tests/suites/test_suite_psa_crypto.function

/* BEGIN_HEADER */
#include <stdint.h>

#include "mbedtls/asn1.h"
#include "mbedtls/asn1write.h"
#include "mbedtls/oid.h"

/* For MBEDTLS_CTR_DRBG_MAX_REQUEST, knowing that psa_generate_random()
 * uses mbedtls_ctr_drbg internally. */
#include "mbedtls/ctr_drbg.h"

#include "psa/crypto.h"
#include "psa_crypto_slot_management.h"

#include "test/asn1_helpers.h"
#include "test/psa_crypto_helpers.h"
#include "test/psa_exercise_key.h"

/** An invalid export length that will never be set by psa_export_key(). */
static const size_t INVALID_EXPORT_LENGTH = ~0U;

/** Test if a buffer contains a constant byte value.
 *
 * `mem_is_char(buffer, c, size)` is true after `memset(buffer, c, size)`.
 *
 * \param buffer    Pointer to the beginning of the buffer.
 * \param c         Expected value of every byte.
 * \param size      Size of the buffer in bytes.
 *
 * \return          1 if the buffer is all-bits-zero.
 * \return          0 if there is at least one nonzero byte.
 */
static int mem_is_char( void *buffer, unsigned char c, size_t size )
{
    size_t i;
    for( i = 0; i < size; i++ )
    {
        if( ( (unsigned char *) buffer )[i] != c )
            return( 0 );
    }
    return( 1 );
}

/* Write the ASN.1 INTEGER with the value 2^(bits-1)+x backwards from *p. */
static int asn1_write_10x( unsigned char **p,
                           unsigned char *start,
                           size_t bits,
                           unsigned char x )
{
    int ret;
    int len = bits / 8 + 1;
    if( bits == 0 )
        return( MBEDTLS_ERR_ASN1_INVALID_DATA );
    if( bits <= 8 && x >= 1 << ( bits - 1 ) )
        return( MBEDTLS_ERR_ASN1_INVALID_DATA );
    if( *p < start || *p - start < (ptrdiff_t) len )
        return( MBEDTLS_ERR_ASN1_BUF_TOO_SMALL );
    *p -= len;
    ( *p )[len-1] = x;
    if( bits % 8 == 0 )
        ( *p )[1] |= 1;
    else
        ( *p )[0] |= 1 << ( bits % 8 );
    MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( p, start, len ) );
    MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( p, start,
                                                       MBEDTLS_ASN1_INTEGER ) );
    return( len );
}

static int construct_fake_rsa_key( unsigned char *buffer,
                                   size_t buffer_size,
                                   unsigned char **p,
                                   size_t bits,
                                   int keypair )
{
    size_t half_bits = ( bits + 1 ) / 2;
    int ret;
    int len = 0;
    /* Construct something that looks like a DER encoding of
     * as defined by PKCS#1 v2.2 (RFC 8017) section A.1.2:
     *   RSAPrivateKey ::= SEQUENCE {
     *       version           Version,
     *       modulus           INTEGER,  -- n
     *       publicExponent    INTEGER,  -- e
     *       privateExponent   INTEGER,  -- d
     *       prime1            INTEGER,  -- p
     *       prime2            INTEGER,  -- q
     *       exponent1         INTEGER,  -- d mod (p-1)
     *       exponent2         INTEGER,  -- d mod (q-1)
     *       coefficient       INTEGER,  -- (inverse of q) mod p
     *       otherPrimeInfos   OtherPrimeInfos OPTIONAL
     *   }
     * Or, for a public key, the same structure with only
     * version, modulus and publicExponent.
     */
    *p = buffer + buffer_size;
    if( keypair )
    {
        MBEDTLS_ASN1_CHK_ADD( len, /* pq */
                              asn1_write_10x( p, buffer, half_bits, 1 ) );
        MBEDTLS_ASN1_CHK_ADD( len, /* dq */
                              asn1_write_10x( p, buffer, half_bits, 1 ) );
        MBEDTLS_ASN1_CHK_ADD( len, /* dp */
                              asn1_write_10x( p, buffer, half_bits, 1 ) );
        MBEDTLS_ASN1_CHK_ADD( len, /* q */
                              asn1_write_10x( p, buffer, half_bits, 1 ) );
        MBEDTLS_ASN1_CHK_ADD( len, /* p != q to pass mbedtls sanity checks */
                              asn1_write_10x( p, buffer, half_bits, 3 ) );
        MBEDTLS_ASN1_CHK_ADD( len, /* d */
                              asn1_write_10x( p, buffer, bits, 1 ) );
    }
    MBEDTLS_ASN1_CHK_ADD( len, /* e = 65537 */
                          asn1_write_10x( p, buffer, 17, 1 ) );
    MBEDTLS_ASN1_CHK_ADD( len, /* n */
                          asn1_write_10x( p, buffer, bits, 1 ) );
    if( keypair )
        MBEDTLS_ASN1_CHK_ADD( len, /* version = 0 */
                              mbedtls_asn1_write_int( p, buffer, 0 ) );
    MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( p, buffer, len ) );
    {
        const unsigned char tag =
            MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE;
        MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( p, buffer, tag ) );
    }
    return( len );
}

int exercise_mac_setup( psa_key_type_t key_type,
                        const unsigned char *key_bytes,
                        size_t key_length,
                        psa_algorithm_t alg,
                        psa_mac_operation_t *operation,
                        psa_status_t *status )
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;

    psa_set_key_usage_flags( &attributes, PSA_KEY_USAGE_SIGN_HASH );
    psa_set_key_algorithm( &attributes, alg );
    psa_set_key_type( &attributes, key_type );
    PSA_ASSERT( psa_import_key( &attributes, key_bytes, key_length, &key ) );

    *status = psa_mac_sign_setup( operation, key, alg );
    /* Whether setup succeeded or failed, abort must succeed. */
    PSA_ASSERT( psa_mac_abort( operation ) );
    /* If setup failed, reproduce the failure, so that the caller can
     * test the resulting state of the operation object. */
    if( *status != PSA_SUCCESS )
    {
        TEST_EQUAL( psa_mac_sign_setup( operation, key, alg ), *status );
    }

    psa_destroy_key( key );
    return( 1 );

exit:
    psa_destroy_key( key );
    return( 0 );
}

int exercise_cipher_setup( psa_key_type_t key_type,
                           const unsigned char *key_bytes,
                           size_t key_length,
                           psa_algorithm_t alg,
                           psa_cipher_operation_t *operation,
                           psa_status_t *status )
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;

    psa_set_key_usage_flags( &attributes, PSA_KEY_USAGE_ENCRYPT );
    psa_set_key_algorithm( &attributes, alg );
    psa_set_key_type( &attributes, key_type );
    PSA_ASSERT( psa_import_key( &attributes, key_bytes, key_length, &key ) );

    *status = psa_cipher_encrypt_setup( operation, key, alg );
    /* Whether setup succeeded or failed, abort must succeed. */
    PSA_ASSERT( psa_cipher_abort( operation ) );
    /* If setup failed, reproduce the failure, so that the caller can
     * test the resulting state of the operation object. */
    if( *status != PSA_SUCCESS )
    {
        TEST_EQUAL( psa_cipher_encrypt_setup( operation, key, alg ),
                    *status );
    }

    psa_destroy_key( key );
    return( 1 );

exit:
    psa_destroy_key( key );
    return( 0 );
}

static int test_operations_on_invalid_key( mbedtls_svc_key_id_t key )
{
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
    mbedtls_svc_key_id_t key_id = mbedtls_svc_key_id_make( 1, 0x6964 );
    uint8_t buffer[1];
    size_t length;
    int ok = 0;

    psa_set_key_id( &attributes, key_id );
    psa_set_key_usage_flags( &attributes, PSA_KEY_USAGE_ENCRYPT );
    psa_set_key_algorithm( &attributes, PSA_ALG_CTR );
    psa_set_key_type( &attributes, PSA_KEY_TYPE_AES );
    TEST_EQUAL( psa_get_key_attributes( key, &attributes ),
                PSA_ERROR_DOES_NOT_EXIST );
    TEST_EQUAL(
        MBEDTLS_SVC_KEY_ID_GET_KEY_ID( psa_get_key_id( &attributes ) ), 0 );
    TEST_EQUAL(
        MBEDTLS_SVC_KEY_ID_GET_OWNER_ID( psa_get_key_id( &attributes ) ), 0 );
    TEST_EQUAL( psa_get_key_lifetime( &attributes ), 0 );
    TEST_EQUAL( psa_get_key_usage_flags( &attributes ), 0 );
    TEST_EQUAL( psa_get_key_algorithm( &attributes ), 0 );
    TEST_EQUAL( psa_get_key_type( &attributes ), 0 );
    TEST_EQUAL( psa_get_key_bits( &attributes ), 0 );

    TEST_EQUAL( psa_export_key( key, buffer, sizeof( buffer ), &length ),
                PSA_ERROR_DOES_NOT_EXIST );
    TEST_EQUAL( psa_export_public_key( key,
                                       buffer, sizeof( buffer ), &length ),
                PSA_ERROR_DOES_NOT_EXIST );

    ok = 1;

exit:
    /*
     * Key attributes may have been returned by psa_get_key_attributes()
     * thus reset them as required.
     */
    psa_reset_key_attributes( &attributes );

    return( ok );
}

/* Assert that a key isn't reported as having a slot number. */
#if defined(MBEDTLS_PSA_CRYPTO_SE_C)
#define ASSERT_NO_SLOT_NUMBER( attributes )                             \
    do                                                                  \
    {                                                                   \
        psa_key_slot_number_t ASSERT_NO_SLOT_NUMBER_slot_number;        \
        TEST_EQUAL( psa_get_key_slot_number(                            \
                        attributes,                                     \
                        &ASSERT_NO_SLOT_NUMBER_slot_number ),           \
                    PSA_ERROR_INVALID_ARGUMENT );                       \
    }                                                                   \
    while( 0 )
#else /* MBEDTLS_PSA_CRYPTO_SE_C */
#define ASSERT_NO_SLOT_NUMBER( attributes )     \
    ( (void) 0 )
#endif /* MBEDTLS_PSA_CRYPTO_SE_C */

/* An overapproximation of the amount of storage needed for a key of the
 * given type and with the given content. The API doesn't make it easy
 * to find a good value for the size. The current implementation doesn't
 * care about the value anyway. */
#define KEY_BITS_FROM_DATA( type, data )        \
    ( data )->len

typedef enum {
    IMPORT_KEY = 0,
    GENERATE_KEY = 1,
    DERIVE_KEY = 2
} generate_method;

/* END_HEADER */

/* BEGIN_DEPENDENCIES
 * depends_on:MBEDTLS_PSA_CRYPTO_C
 * END_DEPENDENCIES
 */

/* BEGIN_CASE */
void static_checks( )
{
    size_t max_truncated_mac_size =
        PSA_ALG_MAC_TRUNCATION_MASK >> PSA_MAC_TRUNCATION_OFFSET;

    /* Check that the length for a truncated MAC always fits in the algorithm
     * encoding. The shifted mask is the maximum truncated value. The
     * untruncated algorithm may be one byte larger. */
    TEST_ASSERT( PSA_MAC_MAX_SIZE <= 1 + max_truncated_mac_size );

#if defined(MBEDTLS_TEST_DEPRECATED)
    /* Check deprecated constants. */
    TEST_EQUAL( PSA_ERROR_UNKNOWN_ERROR, PSA_ERROR_GENERIC_ERROR );
    TEST_EQUAL( PSA_ERROR_OCCUPIED_SLOT, PSA_ERROR_ALREADY_EXISTS );
    TEST_EQUAL( PSA_ERROR_EMPTY_SLOT, PSA_ERROR_DOES_NOT_EXIST );
    TEST_EQUAL( PSA_ERROR_INSUFFICIENT_CAPACITY, PSA_ERROR_INSUFFICIENT_DATA );
    TEST_EQUAL( PSA_ERROR_TAMPERING_DETECTED, PSA_ERROR_CORRUPTION_DETECTED );
    TEST_EQUAL( PSA_KEY_USAGE_SIGN, PSA_KEY_USAGE_SIGN_HASH );
    TEST_EQUAL( PSA_KEY_USAGE_VERIFY, PSA_KEY_USAGE_VERIFY_HASH );
    TEST_EQUAL( PSA_ASYMMETRIC_SIGNATURE_MAX_SIZE, PSA_SIGNATURE_MAX_SIZE );

    TEST_EQUAL( PSA_ECC_CURVE_SECP160K1, PSA_ECC_FAMILY_SECP_K1 );
    TEST_EQUAL( PSA_ECC_CURVE_SECP192K1, PSA_ECC_FAMILY_SECP_K1 );
    TEST_EQUAL( PSA_ECC_CURVE_SECP224K1, PSA_ECC_FAMILY_SECP_K1 );
    TEST_EQUAL( PSA_ECC_CURVE_SECP256K1, PSA_ECC_FAMILY_SECP_K1 );
    TEST_EQUAL( PSA_ECC_CURVE_SECP160R1, PSA_ECC_FAMILY_SECP_R1 );
    TEST_EQUAL( PSA_ECC_CURVE_SECP192R1, PSA_ECC_FAMILY_SECP_R1 );
    TEST_EQUAL( PSA_ECC_CURVE_SECP224R1, PSA_ECC_FAMILY_SECP_R1 );
    TEST_EQUAL( PSA_ECC_CURVE_SECP256R1, PSA_ECC_FAMILY_SECP_R1 );
    TEST_EQUAL( PSA_ECC_CURVE_SECP384R1, PSA_ECC_FAMILY_SECP_R1 );
    TEST_EQUAL( PSA_ECC_CURVE_SECP521R1, PSA_ECC_FAMILY_SECP_R1 );
    TEST_EQUAL( PSA_ECC_CURVE_SECP160R2, PSA_ECC_FAMILY_SECP_R2 );
    TEST_EQUAL( PSA_ECC_CURVE_SECT163K1, PSA_ECC_FAMILY_SECT_K1 );
    TEST_EQUAL( PSA_ECC_CURVE_SECT233K1, PSA_ECC_FAMILY_SECT_K1 );
    TEST_EQUAL( PSA_ECC_CURVE_SECT239K1, PSA_ECC_FAMILY_SECT_K1 );
    TEST_EQUAL( PSA_ECC_CURVE_SECT283K1, PSA_ECC_FAMILY_SECT_K1 );
    TEST_EQUAL( PSA_ECC_CURVE_SECT409K1, PSA_ECC_FAMILY_SECT_K1 );
    TEST_EQUAL( PSA_ECC_CURVE_SECT571K1, PSA_ECC_FAMILY_SECT_K1 );
    TEST_EQUAL( PSA_ECC_CURVE_SECT163R1, PSA_ECC_FAMILY_SECT_R1 );
    TEST_EQUAL( PSA_ECC_CURVE_SECT193R1, PSA_ECC_FAMILY_SECT_R1 );
    TEST_EQUAL( PSA_ECC_CURVE_SECT233R1, PSA_ECC_FAMILY_SECT_R1 );
    TEST_EQUAL( PSA_ECC_CURVE_SECT283R1, PSA_ECC_FAMILY_SECT_R1 );
    TEST_EQUAL( PSA_ECC_CURVE_SECT409R1, PSA_ECC_FAMILY_SECT_R1 );
    TEST_EQUAL( PSA_ECC_CURVE_SECT571R1, PSA_ECC_FAMILY_SECT_R1 );
    TEST_EQUAL( PSA_ECC_CURVE_SECT163R2, PSA_ECC_FAMILY_SECT_R2 );
    TEST_EQUAL( PSA_ECC_CURVE_SECT193R2, PSA_ECC_FAMILY_SECT_R2 );
    TEST_EQUAL( PSA_ECC_CURVE_BRAINPOOL_P256R1, PSA_ECC_FAMILY_BRAINPOOL_P_R1 );
    TEST_EQUAL( PSA_ECC_CURVE_BRAINPOOL_P384R1, PSA_ECC_FAMILY_BRAINPOOL_P_R1 );
    TEST_EQUAL( PSA_ECC_CURVE_BRAINPOOL_P512R1, PSA_ECC_FAMILY_BRAINPOOL_P_R1 );
    TEST_EQUAL( PSA_ECC_CURVE_CURVE25519, PSA_ECC_FAMILY_MONTGOMERY );
    TEST_EQUAL( PSA_ECC_CURVE_CURVE448, PSA_ECC_FAMILY_MONTGOMERY );

    TEST_EQUAL( PSA_ECC_CURVE_SECP_K1, PSA_ECC_FAMILY_SECP_K1 );
    TEST_EQUAL( PSA_ECC_CURVE_SECP_R1, PSA_ECC_FAMILY_SECP_R1 );
    TEST_EQUAL( PSA_ECC_CURVE_SECP_R2, PSA_ECC_FAMILY_SECP_R2 );
    TEST_EQUAL( PSA_ECC_CURVE_SECT_K1, PSA_ECC_FAMILY_SECT_K1 );
    TEST_EQUAL( PSA_ECC_CURVE_SECT_R1, PSA_ECC_FAMILY_SECT_R1 );
    TEST_EQUAL( PSA_ECC_CURVE_SECT_R2, PSA_ECC_FAMILY_SECT_R2 );
    TEST_EQUAL( PSA_ECC_CURVE_BRAINPOOL_P_R1, PSA_ECC_FAMILY_BRAINPOOL_P_R1 );
    TEST_EQUAL( PSA_ECC_CURVE_MONTGOMERY, PSA_ECC_FAMILY_MONTGOMERY );

    TEST_EQUAL( PSA_DH_GROUP_FFDHE2048, PSA_DH_FAMILY_RFC7919 );
    TEST_EQUAL( PSA_DH_GROUP_FFDHE3072, PSA_DH_FAMILY_RFC7919 );
    TEST_EQUAL( PSA_DH_GROUP_FFDHE4096, PSA_DH_FAMILY_RFC7919 );
    TEST_EQUAL( PSA_DH_GROUP_FFDHE6144, PSA_DH_FAMILY_RFC7919 );
    TEST_EQUAL( PSA_DH_GROUP_FFDHE8192, PSA_DH_FAMILY_RFC7919 );

    TEST_EQUAL( PSA_DH_GROUP_RFC7919, PSA_DH_FAMILY_RFC7919 );
    TEST_EQUAL( PSA_DH_GROUP_CUSTOM, PSA_DH_FAMILY_CUSTOM );
#endif
}
/* END_CASE */

/* BEGIN_CASE */
void import_with_policy( int type_arg,
                         int usage_arg, int alg_arg,
                         int expected_status_arg )
{
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
    psa_key_attributes_t got_attributes = PSA_KEY_ATTRIBUTES_INIT;
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_type_t type = type_arg;
    psa_key_usage_t usage = usage_arg;
    psa_algorithm_t alg = alg_arg;
    psa_status_t expected_status = expected_status_arg;
    const uint8_t key_material[16] = {0};
    psa_status_t status;

    PSA_ASSERT( psa_crypto_init( ) );

    psa_set_key_type( &attributes, type );
    psa_set_key_usage_flags( &attributes, usage );
    psa_set_key_algorithm( &attributes, alg );

    status = psa_import_key( &attributes,
                             key_material, sizeof( key_material ),
                             &key );
    TEST_EQUAL( status, expected_status );
    if( status != PSA_SUCCESS )
        goto exit;

    PSA_ASSERT( psa_get_key_attributes( key, &got_attributes ) );
    TEST_EQUAL( psa_get_key_type( &got_attributes ), type );
    TEST_EQUAL( psa_get_key_usage_flags( &got_attributes ), usage );
    TEST_EQUAL( psa_get_key_algorithm( &got_attributes ), alg );
    ASSERT_NO_SLOT_NUMBER( &got_attributes );

    PSA_ASSERT( psa_destroy_key( key ) );
    test_operations_on_invalid_key( key );

exit:
    /*
     * Key attributes may have been returned by psa_get_key_attributes()
     * thus reset them as required.
     */
    psa_reset_key_attributes( &got_attributes );

    psa_destroy_key( key );
    PSA_DONE( );
}
/* END_CASE */

/* BEGIN_CASE */
void import_with_data( data_t *data, int type_arg,
                       int attr_bits_arg,
                       int expected_status_arg )
{
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
    psa_key_attributes_t got_attributes = PSA_KEY_ATTRIBUTES_INIT;
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_type_t type = type_arg;
    size_t attr_bits = attr_bits_arg;
    psa_status_t expected_status = expected_status_arg;
    psa_status_t status;

    PSA_ASSERT( psa_crypto_init( ) );

    psa_set_key_type( &attributes, type );
    psa_set_key_bits( &attributes, attr_bits );

    status = psa_import_key( &attributes, data->x, data->len, &key );
    TEST_EQUAL( status, expected_status );
    if( status != PSA_SUCCESS )
        goto exit;

    PSA_ASSERT( psa_get_key_attributes( key, &got_attributes ) );
    TEST_EQUAL( psa_get_key_type( &got_attributes ), type );
    if( attr_bits != 0 )
        TEST_EQUAL( attr_bits, psa_get_key_bits( &got_attributes ) );
    ASSERT_NO_SLOT_NUMBER( &got_attributes );

    PSA_ASSERT( psa_destroy_key( key ) );
    test_operations_on_invalid_key( key );

exit:
    /*
     * Key attributes may have been returned by psa_get_key_attributes()
     * thus reset them as required.
     */
    psa_reset_key_attributes( &got_attributes );

    psa_destroy_key( key );
    PSA_DONE( );
}
/* END_CASE */

/* BEGIN_CASE */
void import_large_key( int type_arg, int byte_size_arg,
                       int expected_status_arg )
{
    psa_key_type_t type = type_arg;
    size_t byte_size = byte_size_arg;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
    psa_status_t expected_status = expected_status_arg;
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_status_t status;
    uint8_t *buffer = NULL;
    size_t buffer_size = byte_size + 1;
    size_t n;

    /* Skip the test case if the target running the test cannot
     * accomodate large keys due to heap size constraints */
    ASSERT_ALLOC_WEAK( buffer, buffer_size );
    memset( buffer, 'K', byte_size );

    PSA_ASSERT( psa_crypto_init( ) );

    /* Try importing the key */
    psa_set_key_usage_flags( &attributes, PSA_KEY_USAGE_EXPORT );
    psa_set_key_type( &attributes, type );
    status = psa_import_key( &attributes, buffer, byte_size, &key );
    TEST_ASSUME( status != PSA_ERROR_INSUFFICIENT_MEMORY );
    TEST_EQUAL( status, expected_status );

    if( status == PSA_SUCCESS )
    {
        PSA_ASSERT( psa_get_key_attributes( key, &attributes ) );
        TEST_EQUAL( psa_get_key_type( &attributes ), type );
        TEST_EQUAL( psa_get_key_bits( &attributes ),
                    PSA_BYTES_TO_BITS( byte_size ) );
        ASSERT_NO_SLOT_NUMBER( &attributes );
        memset( buffer, 0, byte_size + 1 );
        PSA_ASSERT( psa_export_key( key, buffer, byte_size, &n ) );
        for( n = 0; n < byte_size; n++ )
            TEST_EQUAL( buffer[n], 'K' );
        for( n = byte_size; n < buffer_size; n++ )
            TEST_EQUAL( buffer[n], 0 );
    }

exit:
    /*
     * Key attributes may have been returned by psa_get_key_attributes()
     * thus reset them as required.
     */
    psa_reset_key_attributes( &attributes );

    psa_destroy_key( key );
    PSA_DONE( );
    mbedtls_free( buffer );
}
/* END_CASE */

/* BEGIN_CASE */
void import_rsa_made_up( int bits_arg, int keypair, int expected_status_arg )
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    size_t bits = bits_arg;
    psa_status_t expected_status = expected_status_arg;
    psa_status_t status;
    psa_key_type_t type =
        keypair ? PSA_KEY_TYPE_RSA_KEY_PAIR : PSA_KEY_TYPE_RSA_PUBLIC_KEY;
    size_t buffer_size = /* Slight overapproximations */
        keypair ? bits * 9 / 16 + 80 : bits / 8 + 20;
    unsigned char *buffer = NULL;
    unsigned char *p;
    int ret;
    size_t length;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;

    PSA_ASSERT( psa_crypto_init( ) );
    ASSERT_ALLOC( buffer, buffer_size );

    TEST_ASSERT( ( ret = construct_fake_rsa_key( buffer, buffer_size, &p,
                                                 bits, keypair ) ) >= 0 );
    length = ret;

    /* Try importing the key */
    psa_set_key_type( &attributes, type );
    status = psa_import_key( &attributes, p, length, &key );
    TEST_EQUAL( status, expected_status );

    if( status == PSA_SUCCESS )
        PSA_ASSERT( psa_destroy_key( key ) );

exit:
    mbedtls_free( buffer );
    PSA_DONE( );
}
/* END_CASE */

/* BEGIN_CASE */
void import_export( data_t *data,
                    int type_arg,
                    int usage_arg, int alg_arg,
                    int expected_bits,
                    int export_size_delta,
                    int expected_export_status_arg,
                    int canonical_input )
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_type_t type = type_arg;
    psa_algorithm_t alg = alg_arg;
    psa_status_t expected_export_status = expected_export_status_arg;
    psa_status_t status;
    unsigned char *exported = NULL;
    unsigned char *reexported = NULL;
    size_t export_size;
    size_t exported_length = INVALID_EXPORT_LENGTH;
    size_t reexported_length;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
    psa_key_attributes_t got_attributes = PSA_KEY_ATTRIBUTES_INIT;

    export_size = (ptrdiff_t) data->len + export_size_delta;
    ASSERT_ALLOC( exported, export_size );
    if( ! canonical_input )
        ASSERT_ALLOC( reexported, export_size );
    PSA_ASSERT( psa_crypto_init( ) );

    psa_set_key_usage_flags( &attributes, usage_arg );
    psa_set_key_algorithm( &attributes, alg );
    psa_set_key_type( &attributes, type );

    /* Import the key */
    PSA_ASSERT( psa_import_key( &attributes, data->x, data->len, &key ) );

    /* Test the key information */
    PSA_ASSERT( psa_get_key_attributes( key, &got_attributes ) );
    TEST_EQUAL( psa_get_key_type( &got_attributes ), type );
    TEST_EQUAL( psa_get_key_bits( &got_attributes ), (size_t) expected_bits );
    ASSERT_NO_SLOT_NUMBER( &got_attributes );

    /* Export the key */
    status = psa_export_key( key, exported, export_size, &exported_length );
    TEST_EQUAL( status, expected_export_status );

    /* The exported length must be set by psa_export_key() to a value between 0
     * and export_size. On errors, the exported length must be 0. */
    TEST_ASSERT( exported_length != INVALID_EXPORT_LENGTH );
    TEST_ASSERT( status == PSA_SUCCESS || exported_length == 0 );
    TEST_ASSERT( exported_length <= export_size );

    TEST_ASSERT( mem_is_char( exported + exported_length, 0,
                              export_size - exported_length ) );
    if( status != PSA_SUCCESS )
    {
        TEST_EQUAL( exported_length, 0 );
        goto destroy;
    }

    /* Run sanity checks on the exported key. For non-canonical inputs,
     * this validates the canonical representations. For canonical inputs,
     * this doesn't directly validate the implementation, but it still helps
     * by cross-validating the test data with the sanity check code. */
    if( ! mbedtls_test_psa_exercise_key( key, usage_arg, 0 ) )
        goto exit;

    if( canonical_input )
        ASSERT_COMPARE( data->x, data->len, exported, exported_length );
    else
    {
        mbedtls_svc_key_id_t key2 = MBEDTLS_SVC_KEY_ID_INIT;
        PSA_ASSERT( psa_import_key( &attributes, exported, exported_length,
                                    &key2 ) );
        PSA_ASSERT( psa_export_key( key2,
                                    reexported,
                                    export_size,
                                    &reexported_length ) );
        ASSERT_COMPARE( exported, exported_length,
                        reexported, reexported_length );
        PSA_ASSERT( psa_destroy_key( key2 ) );
    }
    TEST_ASSERT( exported_length <= PSA_EXPORT_KEY_OUTPUT_SIZE( type, psa_get_key_bits( &got_attributes ) ) );

destroy:
    /* Destroy the key */
    PSA_ASSERT( psa_destroy_key( key ) );
    test_operations_on_invalid_key( key );

exit:
    /*
     * Key attributes may have been returned by psa_get_key_attributes()
     * thus reset them as required.
     */
    psa_reset_key_attributes( &got_attributes );

    mbedtls_free( exported );
    mbedtls_free( reexported );
    PSA_DONE( );
}
/* END_CASE */

/* BEGIN_CASE */
void import_export_public_key( data_t *data,
                               int type_arg,
                               int alg_arg,
                               int export_size_delta,
                               int expected_export_status_arg,
                               data_t *expected_public_key )
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_type_t type = type_arg;
    psa_algorithm_t alg = alg_arg;
    psa_status_t expected_export_status = expected_export_status_arg;
    psa_status_t status;
    unsigned char *exported = NULL;
    size_t export_size = expected_public_key->len + export_size_delta;
    size_t exported_length = INVALID_EXPORT_LENGTH;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;

    PSA_ASSERT( psa_crypto_init( ) );

    psa_set_key_usage_flags( &attributes, PSA_KEY_USAGE_EXPORT );
    psa_set_key_algorithm( &attributes, alg );
    psa_set_key_type( &attributes, type );

    /* Import the key */
    PSA_ASSERT( psa_import_key( &attributes, data->x, data->len, &key ) );

    /* Export the public key */
    ASSERT_ALLOC( exported, export_size );
    status = psa_export_public_key( key,
                                    exported, export_size,
                                    &exported_length );
    TEST_EQUAL( status, expected_export_status );
    if( status == PSA_SUCCESS )
    {
        psa_key_type_t public_type = PSA_KEY_TYPE_PUBLIC_KEY_OF_KEY_PAIR( type );
        size_t bits;
        PSA_ASSERT( psa_get_key_attributes( key, &attributes ) );
        bits = psa_get_key_bits( &attributes );
        TEST_ASSERT( expected_public_key->len <=
                     PSA_EXPORT_KEY_OUTPUT_SIZE( public_type, bits ) );
        ASSERT_COMPARE( expected_public_key->x, expected_public_key->len,
                        exported, exported_length );
    }

exit:
    /*
     * Key attributes may have been returned by psa_get_key_attributes()
     * thus reset them as required.
     */
    psa_reset_key_attributes( &attributes );

    mbedtls_free( exported );
    psa_destroy_key( key );
    PSA_DONE( );
}
/* END_CASE */

/* BEGIN_CASE */
void import_and_exercise_key( data_t *data,
                              int type_arg,
                              int bits_arg,
                              int alg_arg )
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_type_t type = type_arg;
    size_t bits = bits_arg;
    psa_algorithm_t alg = alg_arg;
    psa_key_usage_t usage = mbedtls_test_psa_usage_to_exercise( type, alg );
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
    psa_key_attributes_t got_attributes = PSA_KEY_ATTRIBUTES_INIT;

    PSA_ASSERT( psa_crypto_init( ) );

    psa_set_key_usage_flags( &attributes, usage );
    psa_set_key_algorithm( &attributes, alg );
    psa_set_key_type( &attributes, type );

    /* Import the key */
    PSA_ASSERT( psa_import_key( &attributes, data->x, data->len, &key ) );

    /* Test the key information */
    PSA_ASSERT( psa_get_key_attributes( key, &got_attributes ) );
    TEST_EQUAL( psa_get_key_type( &got_attributes ), type );
    TEST_EQUAL( psa_get_key_bits( &got_attributes ), bits );

    /* Do something with the key according to its type and permitted usage. */
    if( ! mbedtls_test_psa_exercise_key( key, usage, alg ) )
        goto exit;

    PSA_ASSERT( psa_destroy_key( key ) );
    test_operations_on_invalid_key( key );

exit:
    /*
     * Key attributes may have been returned by psa_get_key_attributes()
     * thus reset them as required.
     */
    psa_reset_key_attributes( &got_attributes );

    psa_reset_key_attributes( &attributes );
    psa_destroy_key( key );
    PSA_DONE( );
}
/* END_CASE */

/* BEGIN_CASE */
void effective_key_attributes( int type_arg, int expected_type_arg,
                               int bits_arg, int expected_bits_arg,
                               int usage_arg, int expected_usage_arg,
                               int alg_arg, int expected_alg_arg )
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_type_t key_type = type_arg;
    psa_key_type_t expected_key_type = expected_type_arg;
    size_t bits = bits_arg;
    size_t expected_bits = expected_bits_arg;
    psa_algorithm_t alg = alg_arg;
    psa_algorithm_t expected_alg = expected_alg_arg;
    psa_key_usage_t usage = usage_arg;
    psa_key_usage_t expected_usage = expected_usage_arg;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;

    PSA_ASSERT( psa_crypto_init( ) );

    psa_set_key_usage_flags( &attributes, usage );
    psa_set_key_algorithm( &attributes, alg );
    psa_set_key_type( &attributes, key_type );
    psa_set_key_bits( &attributes, bits );

    PSA_ASSERT( psa_generate_key( &attributes, &key ) );
    psa_reset_key_attributes( &attributes );

    PSA_ASSERT( psa_get_key_attributes( key, &attributes ) );
    TEST_EQUAL( psa_get_key_type( &attributes ), expected_key_type );
    TEST_EQUAL( psa_get_key_bits( &attributes ), expected_bits );
    TEST_EQUAL( psa_get_key_usage_flags( &attributes ), expected_usage );
    TEST_EQUAL( psa_get_key_algorithm( &attributes ), expected_alg );

exit:
    /*
     * Key attributes may have been returned by psa_get_key_attributes()
     * thus reset them as required.
     */
    psa_reset_key_attributes( &attributes );

    psa_destroy_key( key );
    PSA_DONE( );
}
/* END_CASE */

/* BEGIN_CASE */
void check_key_policy( int type_arg, int bits_arg,
                       int usage_arg, int alg_arg )
{
    test_effective_key_attributes( type_arg, type_arg, bits_arg, bits_arg,
                                   usage_arg, usage_arg, alg_arg, alg_arg );
    goto exit;
}
/* END_CASE */

/* BEGIN_CASE */
void key_attributes_init( )
{
    /* Test each valid way of initializing the object, except for `= {0}`, as
     * Clang 5 complains when `-Wmissing-field-initializers` is used, even
     * though it's OK by the C standard. We could test for this, but we'd need
     * to supress the Clang warning for the test. */
    psa_key_attributes_t func = psa_key_attributes_init( );
    psa_key_attributes_t init = PSA_KEY_ATTRIBUTES_INIT;
    psa_key_attributes_t zero;

    memset( &zero, 0, sizeof( zero ) );

    TEST_EQUAL( psa_get_key_lifetime( &func ), PSA_KEY_LIFETIME_VOLATILE );
    TEST_EQUAL( psa_get_key_lifetime( &init ), PSA_KEY_LIFETIME_VOLATILE );
    TEST_EQUAL( psa_get_key_lifetime( &zero ), PSA_KEY_LIFETIME_VOLATILE );

    TEST_EQUAL( psa_get_key_type( &func ), 0 );
    TEST_EQUAL( psa_get_key_type( &init ), 0 );
    TEST_EQUAL( psa_get_key_type( &zero ), 0 );

    TEST_EQUAL( psa_get_key_bits( &func ), 0 );
    TEST_EQUAL( psa_get_key_bits( &init ), 0 );
    TEST_EQUAL( psa_get_key_bits( &zero ), 0 );

    TEST_EQUAL( psa_get_key_usage_flags( &func ), 0 );
    TEST_EQUAL( psa_get_key_usage_flags( &init ), 0 );
    TEST_EQUAL( psa_get_key_usage_flags( &zero ), 0 );

    TEST_EQUAL( psa_get_key_algorithm( &func ), 0 );
    TEST_EQUAL( psa_get_key_algorithm( &init ), 0 );
    TEST_EQUAL( psa_get_key_algorithm( &zero ), 0 );
}
/* END_CASE */

/* BEGIN_CASE */
void mac_key_policy( int policy_usage,
                     int policy_alg,
                     int key_type,
                     data_t *key_data,
                     int exercise_alg )
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
    psa_mac_operation_t operation = PSA_MAC_OPERATION_INIT;
    psa_status_t status;
    unsigned char mac[PSA_MAC_MAX_SIZE];

    PSA_ASSERT( psa_crypto_init( ) );

    psa_set_key_usage_flags( &attributes, policy_usage );
    psa_set_key_algorithm( &attributes, policy_alg );
    psa_set_key_type( &attributes, key_type );

    PSA_ASSERT( psa_import_key( &attributes, key_data->x, key_data->len,
                                &key ) );

    status = psa_mac_sign_setup( &operation, key, exercise_alg );
    if( policy_alg == exercise_alg &&
        ( policy_usage & PSA_KEY_USAGE_SIGN_HASH ) != 0 )
        PSA_ASSERT( status );
    else
        TEST_EQUAL( status, PSA_ERROR_NOT_PERMITTED );
    psa_mac_abort( &operation );

    memset( mac, 0, sizeof( mac ) );
    status = psa_mac_verify_setup( &operation, key, exercise_alg );
    if( policy_alg == exercise_alg &&
        ( policy_usage & PSA_KEY_USAGE_VERIFY_HASH ) != 0 )
        PSA_ASSERT( status );
    else
        TEST_EQUAL( status, PSA_ERROR_NOT_PERMITTED );

exit:
    psa_mac_abort( &operation );
    psa_destroy_key( key );
    PSA_DONE( );
}
/* END_CASE */

/* BEGIN_CASE */
void cipher_key_policy( int policy_usage,
                        int policy_alg,
                        int key_type,
                        data_t *key_data,
                        int exercise_alg )
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
    psa_cipher_operation_t operation = PSA_CIPHER_OPERATION_INIT;
    psa_status_t status;

    PSA_ASSERT( psa_crypto_init( ) );

    psa_set_key_usage_flags( &attributes, policy_usage );
    psa_set_key_algorithm( &attributes, policy_alg );
    psa_set_key_type( &attributes, key_type );

    PSA_ASSERT( psa_import_key( &attributes, key_data->x, key_data->len,
                                &key ) );

    status = psa_cipher_encrypt_setup( &operation, key, exercise_alg );
    if( policy_alg == exercise_alg &&
        ( policy_usage & PSA_KEY_USAGE_ENCRYPT ) != 0 )
        PSA_ASSERT( status );
    else
        TEST_EQUAL( status, PSA_ERROR_NOT_PERMITTED );
    psa_cipher_abort( &operation );

    status = psa_cipher_decrypt_setup( &operation, key, exercise_alg );
    if( policy_alg == exercise_alg &&
        ( policy_usage & PSA_KEY_USAGE_DECRYPT ) != 0 )
        PSA_ASSERT( status );
    else
        TEST_EQUAL( status, PSA_ERROR_NOT_PERMITTED );

exit:
    psa_cipher_abort( &operation );
    psa_destroy_key( key );
    PSA_DONE( );
}
/* END_CASE */

/* BEGIN_CASE */
void aead_key_policy( int policy_usage,
                      int policy_alg,
                      int key_type,
                      data_t *key_data,
                      int nonce_length_arg,
                      int tag_length_arg,
                      int exercise_alg )
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
    psa_status_t status;
    unsigned char nonce[16] = {0};
    size_t nonce_length = nonce_length_arg;
    unsigned char tag[16];
    size_t tag_length = tag_length_arg;
    size_t output_length;

    TEST_ASSERT( nonce_length <= sizeof( nonce ) );
    TEST_ASSERT( tag_length <= sizeof( tag ) );

    PSA_ASSERT( psa_crypto_init( ) );

    psa_set_key_usage_flags( &attributes, policy_usage );
    psa_set_key_algorithm( &attributes, policy_alg );
    psa_set_key_type( &attributes, key_type );

    PSA_ASSERT( psa_import_key( &attributes, key_data->x, key_data->len,
                                &key ) );

    status = psa_aead_encrypt( key, exercise_alg,
                               nonce, nonce_length,
                               NULL, 0,
                               NULL, 0,
                               tag, tag_length,
                               &output_length );
    if( policy_alg == exercise_alg &&
        ( policy_usage & PSA_KEY_USAGE_ENCRYPT ) != 0 )
        PSA_ASSERT( status );
    else
        TEST_EQUAL( status, PSA_ERROR_NOT_PERMITTED );

    memset( tag, 0, sizeof( tag ) );
    status = psa_aead_decrypt( key, exercise_alg,
                               nonce, nonce_length,
                               NULL, 0,
                               tag, tag_length,
                               NULL, 0,
                               &output_length );
    if( policy_alg == exercise_alg &&
        ( policy_usage & PSA_KEY_USAGE_DECRYPT ) != 0 )
        TEST_EQUAL( status, PSA_ERROR_INVALID_SIGNATURE );
    else
        TEST_EQUAL( status, PSA_ERROR_NOT_PERMITTED );

exit:
    psa_destroy_key( key );
    PSA_DONE( );
}
/* END_CASE */

/* BEGIN_CASE */
void asymmetric_encryption_key_policy( int policy_usage,
                                       int policy_alg,
                                       int key_type,
                                       data_t *key_data,
                                       int exercise_alg )
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
    psa_status_t status;
    size_t key_bits;
    size_t buffer_length;
    unsigned char *buffer = NULL;
    size_t output_length;

    PSA_ASSERT( psa_crypto_init( ) );

    psa_set_key_usage_flags( &attributes, policy_usage );
    psa_set_key_algorithm( &attributes, policy_alg );
    psa_set_key_type( &attributes, key_type );

    PSA_ASSERT( psa_import_key( &attributes, key_data->x, key_data->len,
                                &key ) );

    PSA_ASSERT( psa_get_key_attributes( key, &attributes ) );
    key_bits = psa_get_key_bits( &attributes );
    buffer_length = PSA_ASYMMETRIC_ENCRYPT_OUTPUT_SIZE( key_type, key_bits,
                                                        exercise_alg );
    ASSERT_ALLOC( buffer, buffer_length );

    status = psa_asymmetric_encrypt( key, exercise_alg,
                                     NULL, 0,
                                     NULL, 0,
                                     buffer, buffer_length,
                                     &output_length );
    if( policy_alg == exercise_alg &&
        ( policy_usage & PSA_KEY_USAGE_ENCRYPT ) != 0 )
        PSA_ASSERT( status );
    else
        TEST_EQUAL( status, PSA_ERROR_NOT_PERMITTED );

    if( buffer_length != 0 )
        memset( buffer, 0, buffer_length );
    status = psa_asymmetric_decrypt( key, exercise_alg,
                                     buffer, buffer_length,
                                     NULL, 0,
                                     buffer, buffer_length,
                                     &output_length );
    if( policy_alg == exercise_alg &&
        ( policy_usage & PSA_KEY_USAGE_DECRYPT ) != 0 )
        TEST_EQUAL( status, PSA_ERROR_INVALID_PADDING );
    else
        TEST_EQUAL( status, PSA_ERROR_NOT_PERMITTED );

exit:
    /*
     * Key attributes may have been returned by psa_get_key_attributes()
     * thus reset them as required.
     */
    psa_reset_key_attributes( &attributes );

    psa_destroy_key( key );
    PSA_DONE( );
    mbedtls_free( buffer );
}
/* END_CASE */

/* BEGIN_CASE */
void asymmetric_signature_key_policy( int policy_usage,
                                      int policy_alg,
                                      int key_type,
                                      data_t *key_data,
                                      int exercise_alg,
                                      int payload_length_arg )
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
    psa_status_t status;
    unsigned char payload[PSA_HASH_MAX_SIZE] = {1};
    /* If `payload_length_arg > 0`, `exercise_alg` is supposed to be
     * compatible with the policy and `payload_length_arg` is supposed to be
     * a valid input length to sign. If `payload_length_arg <= 0`,
     * `exercise_alg` is supposed to be forbidden by the policy. */
    int compatible_alg = payload_length_arg > 0;
    size_t payload_length = compatible_alg ? payload_length_arg : 0;
    unsigned char signature[PSA_SIGNATURE_MAX_SIZE] = {0};
    size_t signature_length;

    PSA_ASSERT( psa_crypto_init( ) );

    psa_set_key_usage_flags( &attributes, policy_usage );
    psa_set_key_algorithm( &attributes, policy_alg );
    psa_set_key_type( &attributes, key_type );

    PSA_ASSERT( psa_import_key( &attributes, key_data->x, key_data->len,
                                &key ) );

    status = psa_sign_hash( key, exercise_alg,
                            payload, payload_length,
                            signature, sizeof( signature ),
                            &signature_length );
    if( compatible_alg && ( policy_usage & PSA_KEY_USAGE_SIGN_HASH ) != 0 )
        PSA_ASSERT( status );
    else
        TEST_EQUAL( status, PSA_ERROR_NOT_PERMITTED );

    memset( signature, 0, sizeof( signature ) );
    status = psa_verify_hash( key, exercise_alg,
                              payload, payload_length,
                              signature, sizeof( signature ) );
    if( compatible_alg && ( policy_usage & PSA_KEY_USAGE_VERIFY_HASH ) != 0 )
        TEST_EQUAL( status, PSA_ERROR_INVALID_SIGNATURE );
    else
        TEST_EQUAL( status, PSA_ERROR_NOT_PERMITTED );

exit:
    psa_destroy_key( key );
    PSA_DONE( );
}
/* END_CASE */

/* BEGIN_CASE */
void derive_key_policy( int policy_usage,
                        int policy_alg,
                        int key_type,
                        data_t *key_data,
                        int exercise_alg )
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
    psa_key_derivation_operation_t operation = PSA_KEY_DERIVATION_OPERATION_INIT;
    psa_status_t status;

    PSA_ASSERT( psa_crypto_init( ) );

    psa_set_key_usage_flags( &attributes, policy_usage );
    psa_set_key_algorithm( &attributes, policy_alg );
    psa_set_key_type( &attributes, key_type );

    PSA_ASSERT( psa_import_key( &attributes, key_data->x, key_data->len,
                                &key ) );

    PSA_ASSERT( psa_key_derivation_setup( &operation, exercise_alg ) );

    if( PSA_ALG_IS_TLS12_PRF( exercise_alg ) ||
            PSA_ALG_IS_TLS12_PSK_TO_MS( exercise_alg ) )
    {
        PSA_ASSERT( psa_key_derivation_input_bytes(
                                            &operation,
                                            PSA_KEY_DERIVATION_INPUT_SEED,
                                            (const uint8_t*) "", 0) );
    }

    status = psa_key_derivation_input_key( &operation,
                                           PSA_KEY_DERIVATION_INPUT_SECRET,
                                           key );

    if( policy_alg == exercise_alg &&
        ( policy_usage & PSA_KEY_USAGE_DERIVE ) != 0 )
        PSA_ASSERT( status );
    else
        TEST_EQUAL( status, PSA_ERROR_NOT_PERMITTED );

exit:
    psa_key_derivation_abort( &operation );
    psa_destroy_key( key );
    PSA_DONE( );
}
/* END_CASE */

/* BEGIN_CASE */
void agreement_key_policy( int policy_usage,
                           int policy_alg,
                           int key_type_arg,
                           data_t *key_data,
                           int exercise_alg,
                           int expected_status_arg )
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
    psa_key_type_t key_type = key_type_arg;
    psa_key_derivation_operation_t operation = PSA_KEY_DERIVATION_OPERATION_INIT;
    psa_status_t status;
    psa_status_t expected_status = expected_status_arg;

    PSA_ASSERT( psa_crypto_init( ) );

    psa_set_key_usage_flags( &attributes, policy_usage );
    psa_set_key_algorithm( &attributes, policy_alg );
    psa_set_key_type( &attributes, key_type );

    PSA_ASSERT( psa_import_key( &attributes, key_data->x, key_data->len,
                                &key ) );

    PSA_ASSERT( psa_key_derivation_setup( &operation, exercise_alg ) );
    status = mbedtls_test_psa_key_agreement_with_self( &operation, key );

    TEST_EQUAL( status, expected_status );

exit:
    psa_key_derivation_abort( &operation );
    psa_destroy_key( key );
    PSA_DONE( );
}
/* END_CASE */

/* BEGIN_CASE */
void key_policy_alg2( int key_type_arg, data_t *key_data,
                      int usage_arg, int alg_arg, int alg2_arg )
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_type_t key_type = key_type_arg;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
    psa_key_attributes_t got_attributes = PSA_KEY_ATTRIBUTES_INIT;
    psa_key_usage_t usage = usage_arg;
    psa_algorithm_t alg = alg_arg;
    psa_algorithm_t alg2 = alg2_arg;

    PSA_ASSERT( psa_crypto_init( ) );

    psa_set_key_usage_flags( &attributes, usage );
    psa_set_key_algorithm( &attributes, alg );
    psa_set_key_enrollment_algorithm( &attributes, alg2 );
    psa_set_key_type( &attributes, key_type );
    PSA_ASSERT( psa_import_key( &attributes, key_data->x, key_data->len,
                                &key ) );

    PSA_ASSERT( psa_get_key_attributes( key, &got_attributes ) );
    TEST_EQUAL( psa_get_key_usage_flags( &got_attributes ), usage );
    TEST_EQUAL( psa_get_key_algorithm( &got_attributes ), alg );
    TEST_EQUAL( psa_get_key_enrollment_algorithm( &got_attributes ), alg2 );

    if( ! mbedtls_test_psa_exercise_key( key, usage, alg ) )
        goto exit;
    if( ! mbedtls_test_psa_exercise_key( key, usage, alg2 ) )
        goto exit;

exit:
    /*
     * Key attributes may have been returned by psa_get_key_attributes()
     * thus reset them as required.
     */
    psa_reset_key_attributes( &got_attributes );

    psa_destroy_key( key );
    PSA_DONE( );
}
/* END_CASE */

/* BEGIN_CASE */
void raw_agreement_key_policy( int policy_usage,
                               int policy_alg,
                               int key_type_arg,
                               data_t *key_data,
                               int exercise_alg,
                               int expected_status_arg )
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
    psa_key_type_t key_type = key_type_arg;
    psa_key_derivation_operation_t operation = PSA_KEY_DERIVATION_OPERATION_INIT;
    psa_status_t status;
    psa_status_t expected_status = expected_status_arg;

    PSA_ASSERT( psa_crypto_init( ) );

    psa_set_key_usage_flags( &attributes, policy_usage );
    psa_set_key_algorithm( &attributes, policy_alg );
    psa_set_key_type( &attributes, key_type );

    PSA_ASSERT( psa_import_key( &attributes, key_data->x, key_data->len,
                                &key ) );

    status = mbedtls_test_psa_raw_key_agreement_with_self( exercise_alg, key );

    TEST_EQUAL( status, expected_status );

exit:
    psa_key_derivation_abort( &operation );
    psa_destroy_key( key );
    PSA_DONE( );
}
/* END_CASE */

/* BEGIN_CASE */
void copy_success( int source_usage_arg,
                   int source_alg_arg, int source_alg2_arg,
                   int type_arg, data_t *material,
                   int copy_attributes,
                   int target_usage_arg,
                   int target_alg_arg, int target_alg2_arg,
                   int expected_usage_arg,
                   int expected_alg_arg, int expected_alg2_arg )
{
    psa_key_attributes_t source_attributes = PSA_KEY_ATTRIBUTES_INIT;
    psa_key_attributes_t target_attributes = PSA_KEY_ATTRIBUTES_INIT;
    psa_key_usage_t expected_usage = expected_usage_arg;
    psa_algorithm_t expected_alg = expected_alg_arg;
    psa_algorithm_t expected_alg2 = expected_alg2_arg;
    mbedtls_svc_key_id_t source_key = MBEDTLS_SVC_KEY_ID_INIT;
    mbedtls_svc_key_id_t target_key = MBEDTLS_SVC_KEY_ID_INIT;
    uint8_t *export_buffer = NULL;

    PSA_ASSERT( psa_crypto_init( ) );

    /* Prepare the source key. */
    psa_set_key_usage_flags( &source_attributes, source_usage_arg );
    psa_set_key_algorithm( &source_attributes, source_alg_arg );
    psa_set_key_enrollment_algorithm( &source_attributes, source_alg2_arg );
    psa_set_key_type( &source_attributes, type_arg );
    PSA_ASSERT( psa_import_key( &source_attributes,
                                material->x, material->len,
                                &source_key ) );
    PSA_ASSERT( psa_get_key_attributes( source_key, &source_attributes ) );

    /* Prepare the target attributes. */
    if( copy_attributes )
    {
        target_attributes = source_attributes;
        /* Set volatile lifetime to reset the key identifier to 0. */
        psa_set_key_lifetime( &target_attributes, PSA_KEY_LIFETIME_VOLATILE );
    }

    if( target_usage_arg != -1 )
        psa_set_key_usage_flags( &target_attributes, target_usage_arg );
    if( target_alg_arg != -1 )
        psa_set_key_algorithm( &target_attributes, target_alg_arg );
    if( target_alg2_arg != -1 )
        psa_set_key_enrollment_algorithm( &target_attributes, target_alg2_arg );

    /* Copy the key. */
    PSA_ASSERT( psa_copy_key( source_key,
                              &target_attributes, &target_key ) );

    /* Destroy the source to ensure that this doesn't affect the target. */
    PSA_ASSERT( psa_destroy_key( source_key ) );

    /* Test that the target slot has the expected content and policy. */
    PSA_ASSERT( psa_get_key_attributes( target_key, &target_attributes ) );
    TEST_EQUAL( psa_get_key_type( &source_attributes ),
                psa_get_key_type( &target_attributes ) );
    TEST_EQUAL( psa_get_key_bits( &source_attributes ),
                psa_get_key_bits( &target_attributes ) );
    TEST_EQUAL( expected_usage, psa_get_key_usage_flags( &target_attributes ) );
    TEST_EQUAL( expected_alg, psa_get_key_algorithm( &target_attributes ) );
    TEST_EQUAL( expected_alg2,
                psa_get_key_enrollment_algorithm( &target_attributes ) );
    if( expected_usage & PSA_KEY_USAGE_EXPORT )
    {
        size_t length;
        ASSERT_ALLOC( export_buffer, material->len );
        PSA_ASSERT( psa_export_key( target_key, export_buffer,
                                    material->len, &length ) );
        ASSERT_COMPARE( material->x, material->len,
                        export_buffer, length );
    }
    if( ! mbedtls_test_psa_exercise_key( target_key, expected_usage, expected_alg ) )
        goto exit;
    if( ! mbedtls_test_psa_exercise_key( target_key, expected_usage, expected_alg2 ) )
        goto exit;

    PSA_ASSERT( psa_destroy_key( target_key ) );

exit:
    /*
     * Source and target key attributes may have been returned by
     * psa_get_key_attributes() thus reset them as required.
     */
    psa_reset_key_attributes( &source_attributes );
    psa_reset_key_attributes( &target_attributes );

    PSA_DONE( );
    mbedtls_free( export_buffer );
}
/* END_CASE */

/* BEGIN_CASE */
void copy_fail( int source_usage_arg,
                int source_alg_arg, int source_alg2_arg,
                int type_arg, data_t *material,
                int target_type_arg, int target_bits_arg,
                int target_usage_arg,
                int target_alg_arg, int target_alg2_arg,
                int expected_status_arg )
{
    psa_key_attributes_t source_attributes = PSA_KEY_ATTRIBUTES_INIT;
    psa_key_attributes_t target_attributes = PSA_KEY_ATTRIBUTES_INIT;
    mbedtls_svc_key_id_t source_key = MBEDTLS_SVC_KEY_ID_INIT;
    mbedtls_svc_key_id_t target_key = MBEDTLS_SVC_KEY_ID_INIT;

    PSA_ASSERT( psa_crypto_init( ) );

    /* Prepare the source key. */
    psa_set_key_usage_flags( &source_attributes, source_usage_arg );
    psa_set_key_algorithm( &source_attributes, source_alg_arg );
    psa_set_key_enrollment_algorithm( &source_attributes, source_alg2_arg );
    psa_set_key_type( &source_attributes, type_arg );
    PSA_ASSERT( psa_import_key( &source_attributes,
                                material->x, material->len,
                                &source_key ) );

    /* Prepare the target attributes. */
    psa_set_key_type( &target_attributes, target_type_arg );
    psa_set_key_bits( &target_attributes, target_bits_arg );
    psa_set_key_usage_flags( &target_attributes, target_usage_arg );
    psa_set_key_algorithm( &target_attributes, target_alg_arg );
    psa_set_key_enrollment_algorithm( &target_attributes, target_alg2_arg );

    /* Try to copy the key. */
    TEST_EQUAL( psa_copy_key( source_key,
                              &target_attributes, &target_key ),
                expected_status_arg );

    PSA_ASSERT( psa_destroy_key( source_key ) );

exit:
    psa_reset_key_attributes( &source_attributes );
    psa_reset_key_attributes( &target_attributes );
    PSA_DONE( );
}
/* END_CASE */

/* BEGIN_CASE */
void hash_operation_init( )
{
    const uint8_t input[1] = { 0 };
    /* Test each valid way of initializing the object, except for `= {0}`, as
     * Clang 5 complains when `-Wmissing-field-initializers` is used, even
     * though it's OK by the C standard. We could test for this, but we'd need
     * to supress the Clang warning for the test. */
    psa_hash_operation_t func = psa_hash_operation_init( );
    psa_hash_operation_t init = PSA_HASH_OPERATION_INIT;
    psa_hash_operation_t zero;

    memset( &zero, 0, sizeof( zero ) );

    /* A freshly-initialized hash operation should not be usable. */
    TEST_EQUAL( psa_hash_update( &func, input, sizeof( input ) ),
                PSA_ERROR_BAD_STATE );
    TEST_EQUAL( psa_hash_update( &init, input, sizeof( input ) ),
                PSA_ERROR_BAD_STATE );
    TEST_EQUAL( psa_hash_update( &zero, input, sizeof( input ) ),
                PSA_ERROR_BAD_STATE );

    /* A default hash operation should be abortable without error. */
    PSA_ASSERT( psa_hash_abort( &func ) );
    PSA_ASSERT( psa_hash_abort( &init ) );
    PSA_ASSERT( psa_hash_abort( &zero ) );
}
/* END_CASE */

/* BEGIN_CASE */
void hash_setup( int alg_arg,
                 int expected_status_arg )
{
    psa_algorithm_t alg = alg_arg;
    psa_status_t expected_status = expected_status_arg;
    psa_hash_operation_t operation = PSA_HASH_OPERATION_INIT;
    psa_status_t status;

    PSA_ASSERT( psa_crypto_init( ) );

    status = psa_hash_setup( &operation, alg );
    TEST_EQUAL( status, expected_status );

    /* Whether setup succeeded or failed, abort must succeed. */
    PSA_ASSERT( psa_hash_abort( &operation ) );

    /* If setup failed, reproduce the failure, so as to
     * test the resulting state of the operation object. */
    if( status != PSA_SUCCESS )
        TEST_EQUAL( psa_hash_setup( &operation, alg ), status );

    /* Now the operation object should be reusable. */
#if defined(KNOWN_SUPPORTED_HASH_ALG)
    PSA_ASSERT( psa_hash_setup( &operation, KNOWN_SUPPORTED_HASH_ALG ) );
    PSA_ASSERT( psa_hash_abort( &operation ) );
#endif

exit:
    PSA_DONE( );
}
/* END_CASE */

/* BEGIN_CASE */
void hash_compute_fail( int alg_arg, data_t *input,
                        int output_size_arg, int expected_status_arg )
{
    psa_algorithm_t alg = alg_arg;
    uint8_t *output = NULL;
    size_t output_size = output_size_arg;
    size_t output_length = INVALID_EXPORT_LENGTH;
    psa_status_t expected_status = expected_status_arg;
    psa_status_t status;

    ASSERT_ALLOC( output, output_size );

    PSA_ASSERT( psa_crypto_init( ) );

    status = psa_hash_compute( alg, input->x, input->len,
                               output, output_size, &output_length );
    TEST_EQUAL( status, expected_status );
    TEST_ASSERT( output_length <= output_size );

exit:
    mbedtls_free( output );
    PSA_DONE( );
}
/* END_CASE */

/* BEGIN_CASE */
void hash_compare_fail( int alg_arg, data_t *input,
                        data_t *reference_hash,
                        int expected_status_arg )
{
    psa_algorithm_t alg = alg_arg;
    psa_status_t expected_status = expected_status_arg;
    psa_status_t status;

    PSA_ASSERT( psa_crypto_init( ) );

    status = psa_hash_compare( alg, input->x, input->len,
                               reference_hash->x, reference_hash->len );
    TEST_EQUAL( status, expected_status );

exit:
    PSA_DONE( );
}
/* END_CASE */

/* BEGIN_CASE */
void hash_compute_compare( int alg_arg, data_t *input,
                           data_t *expected_output )
{
    psa_algorithm_t alg = alg_arg;
    uint8_t output[PSA_HASH_MAX_SIZE + 1];
    size_t output_length = INVALID_EXPORT_LENGTH;
    size_t i;

    PSA_ASSERT( psa_crypto_init( ) );

    /* Compute with tight buffer */
    PSA_ASSERT( psa_hash_compute( alg, input->x, input->len,
                                  output, PSA_HASH_LENGTH( alg ),
                                  &output_length ) );
    TEST_EQUAL( output_length, PSA_HASH_LENGTH( alg ) );
    ASSERT_COMPARE( output, output_length,
                    expected_output->x, expected_output->len );

    /* Compute with larger buffer */
    PSA_ASSERT( psa_hash_compute( alg, input->x, input->len,
                                  output, sizeof( output ),
                                  &output_length ) );
    TEST_EQUAL( output_length, PSA_HASH_LENGTH( alg ) );
    ASSERT_COMPARE( output, output_length,
                    expected_output->x, expected_output->len );

    /* Compare with correct hash */
    PSA_ASSERT( psa_hash_compare( alg, input->x, input->len,
                                  output, output_length ) );

    /* Compare with trailing garbage */
    TEST_EQUAL( psa_hash_compare( alg, input->x, input->len,
                                  output, output_length + 1 ),
                PSA_ERROR_INVALID_SIGNATURE );

    /* Compare with truncated hash */
    TEST_EQUAL( psa_hash_compare( alg, input->x, input->len,
                                  output, output_length - 1 ),
                PSA_ERROR_INVALID_SIGNATURE );

    /* Compare with corrupted value */
    for( i = 0; i < output_length; i++ )
    {
        mbedtls_test_set_step( i );
        output[i] ^= 1;
        TEST_EQUAL( psa_hash_compare( alg, input->x, input->len,
                                      output, output_length ),
                    PSA_ERROR_INVALID_SIGNATURE );
        output[i] ^= 1;
    }

exit:
    PSA_DONE( );
}
/* END_CASE */

/* BEGIN_CASE depends_on:PSA_WANT_ALG_SHA_256 */
void hash_bad_order( )
{
    psa_algorithm_t alg = PSA_ALG_SHA_256;
    unsigned char input[] = "";
    /* SHA-256 hash of an empty string */
    const unsigned char valid_hash[] = {
        0xe3, 0xb0, 0xc4, 0x42, 0x98, 0xfc, 0x1c, 0x14, 0x9a, 0xfb, 0xf4, 0xc8,
        0x99, 0x6f, 0xb9, 0x24, 0x27, 0xae, 0x41, 0xe4, 0x64, 0x9b, 0x93, 0x4c,
        0xa4, 0x95, 0x99, 0x1b, 0x78, 0x52, 0xb8, 0x55 };
    unsigned char hash[sizeof(valid_hash)] = { 0 };
    size_t hash_len;
    psa_hash_operation_t operation = PSA_HASH_OPERATION_INIT;

    PSA_ASSERT( psa_crypto_init( ) );

    /* Call setup twice in a row. */
    PSA_ASSERT( psa_hash_setup( &operation, alg ) );
    TEST_EQUAL( psa_hash_setup( &operation, alg ),
                PSA_ERROR_BAD_STATE );
    PSA_ASSERT( psa_hash_abort( &operation ) );

    /* Call update without calling setup beforehand. */
    TEST_EQUAL( psa_hash_update( &operation, input, sizeof( input ) ),
                PSA_ERROR_BAD_STATE );
    PSA_ASSERT( psa_hash_abort( &operation ) );

    /* Call update after finish. */
    PSA_ASSERT( psa_hash_setup( &operation, alg ) );
    PSA_ASSERT( psa_hash_finish( &operation,
                                 hash, sizeof( hash ), &hash_len ) );
    TEST_EQUAL( psa_hash_update( &operation, input, sizeof( input ) ),
                PSA_ERROR_BAD_STATE );
    PSA_ASSERT( psa_hash_abort( &operation ) );

    /* Call verify without calling setup beforehand. */
    TEST_EQUAL( psa_hash_verify( &operation,
                                 valid_hash, sizeof( valid_hash ) ),
                PSA_ERROR_BAD_STATE );
    PSA_ASSERT( psa_hash_abort( &operation ) );

    /* Call verify after finish. */
    PSA_ASSERT( psa_hash_setup( &operation, alg ) );
    PSA_ASSERT( psa_hash_finish( &operation,
                                 hash, sizeof( hash ), &hash_len ) );
    TEST_EQUAL( psa_hash_verify( &operation,
                                 valid_hash, sizeof( valid_hash ) ),
                PSA_ERROR_BAD_STATE );
    PSA_ASSERT( psa_hash_abort( &operation ) );

    /* Call verify twice in a row. */
    PSA_ASSERT( psa_hash_setup( &operation, alg ) );
    PSA_ASSERT( psa_hash_verify( &operation,
                                 valid_hash, sizeof( valid_hash ) ) );
    TEST_EQUAL( psa_hash_verify( &operation,
                                 valid_hash, sizeof( valid_hash ) ),
                PSA_ERROR_BAD_STATE );
    PSA_ASSERT( psa_hash_abort( &operation ) );

    /* Call finish without calling setup beforehand. */
    TEST_EQUAL( psa_hash_finish( &operation,
                                 hash, sizeof( hash ), &hash_len ),
                PSA_ERROR_BAD_STATE );
    PSA_ASSERT( psa_hash_abort( &operation ) );

    /* Call finish twice in a row. */
    PSA_ASSERT( psa_hash_setup( &operation, alg ) );
    PSA_ASSERT( psa_hash_finish( &operation,
                                 hash, sizeof( hash ), &hash_len ) );
    TEST_EQUAL( psa_hash_finish( &operation,
                                 hash, sizeof( hash ), &hash_len ),
                PSA_ERROR_BAD_STATE );
    PSA_ASSERT( psa_hash_abort( &operation ) );

    /* Call finish after calling verify. */
    PSA_ASSERT( psa_hash_setup( &operation, alg ) );
    PSA_ASSERT( psa_hash_verify( &operation,
                                 valid_hash, sizeof( valid_hash ) ) );
    TEST_EQUAL( psa_hash_finish( &operation,
                                 hash, sizeof( hash ), &hash_len ),
                PSA_ERROR_BAD_STATE );
    PSA_ASSERT( psa_hash_abort( &operation ) );

exit:
    PSA_DONE( );
}
/* END_CASE */

/* BEGIN_CASE depends_on:PSA_WANT_ALG_SHA_256 */
void hash_verify_bad_args( )
{
    psa_algorithm_t alg = PSA_ALG_SHA_256;
    /* SHA-256 hash of an empty string with 2 extra bytes (0xaa and 0xbb)
     * appended to it */
    unsigned char hash[] = {
        0xe3, 0xb0, 0xc4, 0x42, 0x98, 0xfc, 0x1c, 0x14, 0x9a, 0xfb, 0xf4, 0xc8,
        0x99, 0x6f, 0xb9, 0x24, 0x27, 0xae, 0x41, 0xe4, 0x64, 0x9b, 0x93, 0x4c,
        0xa4, 0x95, 0x99, 0x1b, 0x78, 0x52, 0xb8, 0x55, 0xaa, 0xbb };
    size_t expected_size = PSA_HASH_LENGTH( alg );
    psa_hash_operation_t operation = PSA_HASH_OPERATION_INIT;

    PSA_ASSERT( psa_crypto_init( ) );

    /* psa_hash_verify with a smaller hash than expected */
    PSA_ASSERT( psa_hash_setup( &operation, alg ) );
    TEST_EQUAL( psa_hash_verify( &operation, hash, expected_size - 1 ),
                PSA_ERROR_INVALID_SIGNATURE );

    /* psa_hash_verify with a non-matching hash */
    PSA_ASSERT( psa_hash_setup( &operation, alg ) );
    TEST_EQUAL( psa_hash_verify( &operation, hash + 1, expected_size ),
                PSA_ERROR_INVALID_SIGNATURE );

    /* psa_hash_verify with a hash longer than expected */
    PSA_ASSERT( psa_hash_setup( &operation, alg ) );
    TEST_EQUAL( psa_hash_verify( &operation, hash, sizeof( hash ) ),
                PSA_ERROR_INVALID_SIGNATURE );

exit:
    PSA_DONE( );
}
/* END_CASE */

/* BEGIN_CASE depends_on:MBEDTLS_SHA256_C */
void hash_finish_bad_args( )
{
    psa_algorithm_t alg = PSA_ALG_SHA_256;
    unsigned char hash[PSA_HASH_MAX_SIZE];
    size_t expected_size = PSA_HASH_LENGTH( alg );
    psa_hash_operation_t operation = PSA_HASH_OPERATION_INIT;
    size_t hash_len;

    PSA_ASSERT( psa_crypto_init( ) );

    /* psa_hash_finish with a smaller hash buffer than expected */
    PSA_ASSERT( psa_hash_setup( &operation, alg ) );
    TEST_EQUAL( psa_hash_finish( &operation,
                                 hash, expected_size - 1, &hash_len ),
                PSA_ERROR_BUFFER_TOO_SMALL );

exit:
    PSA_DONE( );
}
/* END_CASE */

/* BEGIN_CASE depends_on:MBEDTLS_SHA256_C */
void hash_clone_source_state( )
{
    psa_algorithm_t alg = PSA_ALG_SHA_256;
    unsigned char hash[PSA_HASH_MAX_SIZE];
    psa_hash_operation_t op_source = PSA_HASH_OPERATION_INIT;
    psa_hash_operation_t op_init = PSA_HASH_OPERATION_INIT;
    psa_hash_operation_t op_setup = PSA_HASH_OPERATION_INIT;
    psa_hash_operation_t op_finished = PSA_HASH_OPERATION_INIT;
    psa_hash_operation_t op_aborted = PSA_HASH_OPERATION_INIT;
    size_t hash_len;

    PSA_ASSERT( psa_crypto_init( ) );
    PSA_ASSERT( psa_hash_setup( &op_source, alg ) );

    PSA_ASSERT( psa_hash_setup( &op_setup, alg ) );
    PSA_ASSERT( psa_hash_setup( &op_finished, alg ) );
    PSA_ASSERT( psa_hash_finish( &op_finished,
                                 hash, sizeof( hash ), &hash_len ) );
    PSA_ASSERT( psa_hash_setup( &op_aborted, alg ) );
    PSA_ASSERT( psa_hash_abort( &op_aborted ) );

    TEST_EQUAL( psa_hash_clone( &op_source, &op_setup ),
                PSA_ERROR_BAD_STATE );

    PSA_ASSERT( psa_hash_clone( &op_source, &op_init ) );
    PSA_ASSERT( psa_hash_finish( &op_init,
                                 hash, sizeof( hash ), &hash_len ) );
    PSA_ASSERT( psa_hash_clone( &op_source, &op_finished ) );
    PSA_ASSERT( psa_hash_finish( &op_finished,
                                 hash, sizeof( hash ), &hash_len ) );
    PSA_ASSERT( psa_hash_clone( &op_source, &op_aborted ) );
    PSA_ASSERT( psa_hash_finish( &op_aborted,
                                 hash, sizeof( hash ), &hash_len ) );

exit:
    psa_hash_abort( &op_source );
    psa_hash_abort( &op_init );
    psa_hash_abort( &op_setup );
    psa_hash_abort( &op_finished );
    psa_hash_abort( &op_aborted );
    PSA_DONE( );
}
/* END_CASE */

/* BEGIN_CASE depends_on:MBEDTLS_SHA256_C */
void hash_clone_target_state( )
{
    psa_algorithm_t alg = PSA_ALG_SHA_256;
    unsigned char hash[PSA_HASH_MAX_SIZE];
    psa_hash_operation_t op_init = PSA_HASH_OPERATION_INIT;
    psa_hash_operation_t op_setup = PSA_HASH_OPERATION_INIT;
    psa_hash_operation_t op_finished = PSA_HASH_OPERATION_INIT;
    psa_hash_operation_t op_aborted = PSA_HASH_OPERATION_INIT;
    psa_hash_operation_t op_target = PSA_HASH_OPERATION_INIT;
    size_t hash_len;

    PSA_ASSERT( psa_crypto_init( ) );

    PSA_ASSERT( psa_hash_setup( &op_setup, alg ) );
    PSA_ASSERT( psa_hash_setup( &op_finished, alg ) );
    PSA_ASSERT( psa_hash_finish( &op_finished,
                                 hash, sizeof( hash ), &hash_len ) );
    PSA_ASSERT( psa_hash_setup( &op_aborted, alg ) );
    PSA_ASSERT( psa_hash_abort( &op_aborted ) );

    PSA_ASSERT( psa_hash_clone( &op_setup, &op_target ) );
    PSA_ASSERT( psa_hash_finish( &op_target,
                                 hash, sizeof( hash ), &hash_len ) );

    TEST_EQUAL( psa_hash_clone( &op_init, &op_target ), PSA_ERROR_BAD_STATE );
    TEST_EQUAL( psa_hash_clone( &op_finished, &op_target ),
                PSA_ERROR_BAD_STATE );
    TEST_EQUAL( psa_hash_clone( &op_aborted, &op_target ),
                PSA_ERROR_BAD_STATE );

exit:
    psa_hash_abort( &op_target );
    psa_hash_abort( &op_init );
    psa_hash_abort( &op_setup );
    psa_hash_abort( &op_finished );
    psa_hash_abort( &op_aborted );
    PSA_DONE( );
}
/* END_CASE */

/* BEGIN_CASE */
void mac_operation_init( )
{
    const uint8_t input[1] = { 0 };

    /* Test each valid way of initializing the object, except for `= {0}`, as
     * Clang 5 complains when `-Wmissing-field-initializers` is used, even
     * though it's OK by the C standard. We could test for this, but we'd need
     * to supress the Clang warning for the test. */
    psa_mac_operation_t func = psa_mac_operation_init( );
    psa_mac_operation_t init = PSA_MAC_OPERATION_INIT;
    psa_mac_operation_t zero;

    memset( &zero, 0, sizeof( zero ) );

    /* A freshly-initialized MAC operation should not be usable. */
    TEST_EQUAL( psa_mac_update( &func,
                                input, sizeof( input ) ),
                PSA_ERROR_BAD_STATE );
    TEST_EQUAL( psa_mac_update( &init,
                                input, sizeof( input ) ),
                PSA_ERROR_BAD_STATE );
    TEST_EQUAL( psa_mac_update( &zero,
                                input, sizeof( input ) ),
                PSA_ERROR_BAD_STATE );

    /* A default MAC operation should be abortable without error. */
    PSA_ASSERT( psa_mac_abort( &func ) );
    PSA_ASSERT( psa_mac_abort( &init ) );
    PSA_ASSERT( psa_mac_abort( &zero ) );
}
/* END_CASE */

/* BEGIN_CASE */
void mac_setup( int key_type_arg,
                data_t *key,
                int alg_arg,
                int expected_status_arg )
{
    psa_key_type_t key_type = key_type_arg;
    psa_algorithm_t alg = alg_arg;
    psa_status_t expected_status = expected_status_arg;
    psa_mac_operation_t operation = PSA_MAC_OPERATION_INIT;
    psa_status_t status = PSA_ERROR_GENERIC_ERROR;
#if defined(KNOWN_SUPPORTED_MAC_ALG)
    const uint8_t smoke_test_key_data[16] = "kkkkkkkkkkkkkkkk";
#endif

    PSA_ASSERT( psa_crypto_init( ) );

    if( ! exercise_mac_setup( key_type, key->x, key->len, alg,
                              &operation, &status ) )
        goto exit;
    TEST_EQUAL( status, expected_status );

    /* The operation object should be reusable. */
#if defined(KNOWN_SUPPORTED_MAC_ALG)
    if( ! exercise_mac_setup( KNOWN_SUPPORTED_MAC_KEY_TYPE,
                              smoke_test_key_data,
                              sizeof( smoke_test_key_data ),
                              KNOWN_SUPPORTED_MAC_ALG,
                              &operation, &status ) )
        goto exit;
    TEST_EQUAL( status, PSA_SUCCESS );
#endif

exit:
    PSA_DONE( );
}
/* END_CASE */

/* BEGIN_CASE depends_on:PSA_WANT_KEY_TYPE_HMAC:PSA_WANT_ALG_HMAC:PSA_WANT_ALG_SHA_256 */
void mac_bad_order( )
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_type_t key_type = PSA_KEY_TYPE_HMAC;
    psa_algorithm_t alg = PSA_ALG_HMAC(PSA_ALG_SHA_256);
    const uint8_t key_data[] = {
        0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
        0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
        0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa };
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
    psa_mac_operation_t operation = PSA_MAC_OPERATION_INIT;
    uint8_t sign_mac[PSA_MAC_MAX_SIZE + 10] = { 0 };
    size_t sign_mac_length = 0;
    const uint8_t input[] = { 0xbb, 0xbb, 0xbb, 0xbb };
    const uint8_t verify_mac[] = {
        0x74, 0x65, 0x93, 0x8c, 0xeb, 0x1d, 0xb3, 0x76, 0x5a, 0x38, 0xe7, 0xdd,
        0x85, 0xc5, 0xad, 0x4f, 0x07, 0xe7, 0xd5, 0xb2, 0x64, 0xf0, 0x1a, 0x1a,
        0x2c, 0xf9, 0x18, 0xca, 0x59, 0x7e, 0x5d, 0xf6 };

    PSA_ASSERT( psa_crypto_init( ) );
    psa_set_key_usage_flags( &attributes, PSA_KEY_USAGE_SIGN_HASH | PSA_KEY_USAGE_VERIFY_HASH );
    psa_set_key_algorithm( &attributes, alg );
    psa_set_key_type( &attributes, key_type );

    PSA_ASSERT( psa_import_key( &attributes, key_data, sizeof( key_data ),
                                &key ) );

    /* Call update without calling setup beforehand. */
    TEST_EQUAL( psa_mac_update( &operation, input, sizeof( input ) ),
                PSA_ERROR_BAD_STATE );
    PSA_ASSERT( psa_mac_abort( &operation ) );

    /* Call sign finish without calling setup beforehand. */
    TEST_EQUAL( psa_mac_sign_finish( &operation, sign_mac, sizeof( sign_mac ),
                                     &sign_mac_length),
                PSA_ERROR_BAD_STATE );
    PSA_ASSERT( psa_mac_abort( &operation ) );

    /* Call verify finish without calling setup beforehand. */
    TEST_EQUAL( psa_mac_verify_finish( &operation,
                                       verify_mac, sizeof( verify_mac ) ),
                PSA_ERROR_BAD_STATE );
    PSA_ASSERT( psa_mac_abort( &operation ) );

    /* Call setup twice in a row. */
    PSA_ASSERT( psa_mac_sign_setup( &operation, key, alg ) );
    TEST_EQUAL( psa_mac_sign_setup( &operation, key, alg ),
                PSA_ERROR_BAD_STATE );
    PSA_ASSERT( psa_mac_abort( &operation ) );

    /* Call update after sign finish. */
    PSA_ASSERT( psa_mac_sign_setup( &operation, key, alg ) );
    PSA_ASSERT( psa_mac_update( &operation, input, sizeof( input ) ) );
    PSA_ASSERT( psa_mac_sign_finish( &operation,
                                     sign_mac, sizeof( sign_mac ),
                                     &sign_mac_length ) );
    TEST_EQUAL( psa_mac_update( &operation, input, sizeof( input ) ),
                PSA_ERROR_BAD_STATE );
    PSA_ASSERT( psa_mac_abort( &operation ) );

    /* Call update after verify finish. */
    PSA_ASSERT( psa_mac_verify_setup( &operation, key, alg ) );
    PSA_ASSERT( psa_mac_update( &operation, input, sizeof( input ) ) );
    PSA_ASSERT( psa_mac_verify_finish( &operation,
                                       verify_mac, sizeof( verify_mac ) ) );
    TEST_EQUAL( psa_mac_update( &operation, input, sizeof( input ) ),
                PSA_ERROR_BAD_STATE );
    PSA_ASSERT( psa_mac_abort( &operation ) );

    /* Call sign finish twice in a row. */
    PSA_ASSERT( psa_mac_sign_setup( &operation, key, alg ) );
    PSA_ASSERT( psa_mac_update( &operation, input, sizeof( input ) ) );
    PSA_ASSERT( psa_mac_sign_finish( &operation,
                                     sign_mac, sizeof( sign_mac ),
                                     &sign_mac_length ) );
    TEST_EQUAL( psa_mac_sign_finish( &operation,
                                     sign_mac, sizeof( sign_mac ),
                                     &sign_mac_length ),
                PSA_ERROR_BAD_STATE );
    PSA_ASSERT( psa_mac_abort( &operation ) );

    /* Call verify finish twice in a row. */
    PSA_ASSERT( psa_mac_verify_setup( &operation, key, alg ) );
    PSA_ASSERT( psa_mac_update( &operation, input, sizeof( input ) ) );
    PSA_ASSERT( psa_mac_verify_finish( &operation,
                                       verify_mac, sizeof( verify_mac ) ) );
    TEST_EQUAL( psa_mac_verify_finish( &operation,
                                       verify_mac, sizeof( verify_mac ) ),
                PSA_ERROR_BAD_STATE );
    PSA_ASSERT( psa_mac_abort( &operation ) );

    /* Setup sign but try verify. */
    PSA_ASSERT( psa_mac_sign_setup( &operation, key, alg ) );
    PSA_ASSERT( psa_mac_update( &operation, input, sizeof( input ) ) );
    TEST_EQUAL( psa_mac_verify_finish( &operation,
                                       verify_mac, sizeof( verify_mac ) ),
                PSA_ERROR_BAD_STATE );
    PSA_ASSERT( psa_mac_abort( &operation ) );

    /* Setup verify but try sign. */
    PSA_ASSERT( psa_mac_verify_setup( &operation, key, alg ) );
    PSA_ASSERT( psa_mac_update( &operation, input, sizeof( input ) ) );
    TEST_EQUAL( psa_mac_sign_finish( &operation,
                                     sign_mac, sizeof( sign_mac ),
                                     &sign_mac_length ),
                PSA_ERROR_BAD_STATE );
    PSA_ASSERT( psa_mac_abort( &operation ) );

    PSA_ASSERT( psa_destroy_key( key ) );

exit:
    PSA_DONE( );
}
/* END_CASE */

/* BEGIN_CASE */
void mac_sign( int key_type_arg,
               data_t *key_data,
               int alg_arg,
               data_t *input,
               data_t *expected_mac )
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_type_t key_type = key_type_arg;
    psa_algorithm_t alg = alg_arg;
    psa_mac_operation_t operation = PSA_MAC_OPERATION_INIT;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
    uint8_t *actual_mac = NULL;
    size_t mac_buffer_size =
        PSA_MAC_LENGTH( key_type, PSA_BYTES_TO_BITS( key_data->len ), alg );
    size_t mac_length = 0;
    const size_t output_sizes_to_test[] = {
        0,
        1,
        expected_mac->len - 1,
        expected_mac->len,
        expected_mac->len + 1,
    };

    TEST_ASSERT( mac_buffer_size <= PSA_MAC_MAX_SIZE );
    /* We expect PSA_MAC_LENGTH to be exact. */
    TEST_ASSERT( expected_mac->len == mac_buffer_size );

    PSA_ASSERT( psa_crypto_init( ) );

    psa_set_key_usage_flags( &attributes, PSA_KEY_USAGE_SIGN_HASH );
    psa_set_key_algorithm( &attributes, alg );
    psa_set_key_type( &attributes, key_type );

    PSA_ASSERT( psa_import_key( &attributes, key_data->x, key_data->len,
                                &key ) );

    for( size_t i = 0; i < ARRAY_LENGTH( output_sizes_to_test ); i++ )
    {
        const size_t output_size = output_sizes_to_test[i];
        psa_status_t expected_status =
            ( output_size >= expected_mac->len ? PSA_SUCCESS :
              PSA_ERROR_BUFFER_TOO_SMALL );

        mbedtls_test_set_step( output_size );
        ASSERT_ALLOC( actual_mac, output_size );

        /* Calculate the MAC. */
        PSA_ASSERT( psa_mac_sign_setup( &operation, key, alg ) );
        PSA_ASSERT( psa_mac_update( &operation,
                                    input->x, input->len ) );
        TEST_EQUAL( psa_mac_sign_finish( &operation,
                                         actual_mac, output_size,
                                         &mac_length ),
                    expected_status );
        PSA_ASSERT( psa_mac_abort( &operation ) );

        if( expected_status == PSA_SUCCESS )
        {
            ASSERT_COMPARE( expected_mac->x, expected_mac->len,
                            actual_mac, mac_length );
        }
        mbedtls_free( actual_mac );
        actual_mac = NULL;
    }

exit:
    psa_mac_abort( &operation );
    psa_destroy_key( key );
    PSA_DONE( );
    mbedtls_free( actual_mac );
}
/* END_CASE */

/* BEGIN_CASE */
void mac_verify( int key_type_arg,
                 data_t *key_data,
                 int alg_arg,
                 data_t *input,
                 data_t *expected_mac )
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_type_t key_type = key_type_arg;
    psa_algorithm_t alg = alg_arg;
    psa_mac_operation_t operation = PSA_MAC_OPERATION_INIT;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
    uint8_t *perturbed_mac = NULL;

    TEST_ASSERT( expected_mac->len <= PSA_MAC_MAX_SIZE );

    PSA_ASSERT( psa_crypto_init( ) );

    psa_set_key_usage_flags( &attributes, PSA_KEY_USAGE_VERIFY_HASH );
    psa_set_key_algorithm( &attributes, alg );
    psa_set_key_type( &attributes, key_type );

    PSA_ASSERT( psa_import_key( &attributes, key_data->x, key_data->len,
                                &key ) );

    /* Test the correct MAC. */
    PSA_ASSERT( psa_mac_verify_setup( &operation, key, alg ) );
    PSA_ASSERT( psa_mac_update( &operation,
                                input->x, input->len ) );
    PSA_ASSERT( psa_mac_verify_finish( &operation,
                                       expected_mac->x,
                                       expected_mac->len ) );

    /* Test a MAC that's too short. */
    PSA_ASSERT( psa_mac_verify_setup( &operation, key, alg ) );
    PSA_ASSERT( psa_mac_update( &operation,
                                input->x, input->len ) );
    TEST_EQUAL( psa_mac_verify_finish( &operation,
                                       expected_mac->x,
                                       expected_mac->len - 1 ),
                PSA_ERROR_INVALID_SIGNATURE );

    /* Test a MAC that's too long. */
    ASSERT_ALLOC( perturbed_mac, expected_mac->len + 1 );
    memcpy( perturbed_mac, expected_mac->x, expected_mac->len );
    PSA_ASSERT( psa_mac_verify_setup( &operation, key, alg ) );
    PSA_ASSERT( psa_mac_update( &operation,
                                input->x, input->len ) );
    TEST_EQUAL( psa_mac_verify_finish( &operation,
                                       perturbed_mac,
                                       expected_mac->len + 1 ),
                PSA_ERROR_INVALID_SIGNATURE );

    /* Test changing one byte. */
    for( size_t i = 0; i < expected_mac->len; i++ )
    {
        mbedtls_test_set_step( i );
        perturbed_mac[i] ^= 1;
        PSA_ASSERT( psa_mac_verify_setup( &operation, key, alg ) );
        PSA_ASSERT( psa_mac_update( &operation,
                                    input->x, input->len ) );
        TEST_EQUAL( psa_mac_verify_finish( &operation,
                                           perturbed_mac,
                                           expected_mac->len ),
                    PSA_ERROR_INVALID_SIGNATURE );
        perturbed_mac[i] ^= 1;
    }

exit:
    psa_mac_abort( &operation );
    psa_destroy_key( key );
    PSA_DONE( );
    mbedtls_free( perturbed_mac );
}
/* END_CASE */

/* BEGIN_CASE */
void cipher_operation_init( )
{
    const uint8_t input[1] = { 0 };
    unsigned char output[1] = { 0 };
    size_t output_length;
    /* Test each valid way of initializing the object, except for `= {0}`, as
     * Clang 5 complains when `-Wmissing-field-initializers` is used, even
     * though it's OK by the C standard. We could test for this, but we'd need
     * to supress the Clang warning for the test. */
    psa_cipher_operation_t func = psa_cipher_operation_init( );
    psa_cipher_operation_t init = PSA_CIPHER_OPERATION_INIT;
    psa_cipher_operation_t zero;

    memset( &zero, 0, sizeof( zero ) );

    /* A freshly-initialized cipher operation should not be usable. */
    TEST_EQUAL( psa_cipher_update( &func,
                                   input, sizeof( input ),
                                   output, sizeof( output ),
                                   &output_length ),
                PSA_ERROR_BAD_STATE );
    TEST_EQUAL( psa_cipher_update( &init,
                                   input, sizeof( input ),
                                   output, sizeof( output ),
                                   &output_length ),
                PSA_ERROR_BAD_STATE );
    TEST_EQUAL( psa_cipher_update( &zero,
                                   input, sizeof( input ),
                                   output, sizeof( output ),
                                   &output_length ),
                PSA_ERROR_BAD_STATE );

    /* A default cipher operation should be abortable without error. */
    PSA_ASSERT( psa_cipher_abort( &func ) );
    PSA_ASSERT( psa_cipher_abort( &init ) );
    PSA_ASSERT( psa_cipher_abort( &zero ) );
}
/* END_CASE */

/* BEGIN_CASE */
void cipher_setup( int key_type_arg,
                   data_t *key,
                   int alg_arg,
                   int expected_status_arg )
{
    psa_key_type_t key_type = key_type_arg;
    psa_algorithm_t alg = alg_arg;
    psa_status_t expected_status = expected_status_arg;
    psa_cipher_operation_t operation = PSA_CIPHER_OPERATION_INIT;
    psa_status_t status;
#if defined(KNOWN_SUPPORTED_CIPHER_ALG)
    const uint8_t smoke_test_key_data[16] = "kkkkkkkkkkkkkkkk";
#endif

    PSA_ASSERT( psa_crypto_init( ) );

    if( ! exercise_cipher_setup( key_type, key->x, key->len, alg,
                                 &operation, &status ) )
        goto exit;
    TEST_EQUAL( status, expected_status );

    /* The operation object should be reusable. */
#if defined(KNOWN_SUPPORTED_CIPHER_ALG)
    if( ! exercise_cipher_setup( KNOWN_SUPPORTED_CIPHER_KEY_TYPE,
                                 smoke_test_key_data,
                                 sizeof( smoke_test_key_data ),
                                 KNOWN_SUPPORTED_CIPHER_ALG,
                                 &operation, &status ) )
        goto exit;
    TEST_EQUAL( status, PSA_SUCCESS );
#endif

exit:
    psa_cipher_abort( &operation );
    PSA_DONE( );
}
/* END_CASE */

/* BEGIN_CASE depends_on:MBEDTLS_AES_C:MBEDTLS_CIPHER_MODE_CBC:MBEDTLS_CIPHER_PADDING_PKCS7 */
void cipher_bad_order( )
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_type_t key_type = PSA_KEY_TYPE_AES;
    psa_algorithm_t alg = PSA_ALG_CBC_PKCS7;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
    psa_cipher_operation_t operation = PSA_CIPHER_OPERATION_INIT;
    unsigned char iv[PSA_BLOCK_CIPHER_BLOCK_LENGTH(PSA_KEY_TYPE_AES)] = { 0 };
    const uint8_t key_data[] = {
        0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
        0xaa, 0xaa, 0xaa, 0xaa };
    const uint8_t text[] = {
        0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb,
        0xbb, 0xbb, 0xbb, 0xbb };
    uint8_t buffer[PSA_BLOCK_CIPHER_BLOCK_LENGTH(PSA_KEY_TYPE_AES)] = { 0 };
    size_t length = 0;

    PSA_ASSERT( psa_crypto_init( ) );
    psa_set_key_usage_flags( &attributes, PSA_KEY_USAGE_ENCRYPT | PSA_KEY_USAGE_DECRYPT );
    psa_set_key_algorithm( &attributes, alg );
    psa_set_key_type( &attributes, key_type );
    PSA_ASSERT( psa_import_key( &attributes, key_data, sizeof( key_data ),
                                &key ) );

    /* Call encrypt setup twice in a row. */
    PSA_ASSERT( psa_cipher_encrypt_setup( &operation, key, alg ) );
    TEST_EQUAL( psa_cipher_encrypt_setup( &operation, key, alg ),
                PSA_ERROR_BAD_STATE );
    PSA_ASSERT( psa_cipher_abort( &operation ) );

    /* Call decrypt setup twice in a row. */
    PSA_ASSERT( psa_cipher_decrypt_setup( &operation, key, alg ) );
    TEST_EQUAL( psa_cipher_decrypt_setup( &operation, key, alg ),
                PSA_ERROR_BAD_STATE );
    PSA_ASSERT( psa_cipher_abort( &operation ) );

    /* Generate an IV without calling setup beforehand. */
    TEST_EQUAL( psa_cipher_generate_iv( &operation,
                                        buffer, sizeof( buffer ),
                                        &length ),
                PSA_ERROR_BAD_STATE );
    PSA_ASSERT( psa_cipher_abort( &operation ) );

    /* Generate an IV twice in a row. */
    PSA_ASSERT( psa_cipher_encrypt_setup( &operation, key, alg ) );
    PSA_ASSERT( psa_cipher_generate_iv( &operation,
                                        buffer, sizeof( buffer ),
                                        &length ) );
    TEST_EQUAL( psa_cipher_generate_iv( &operation,
                                        buffer, sizeof( buffer ),
                                        &length ),
                PSA_ERROR_BAD_STATE );
    PSA_ASSERT( psa_cipher_abort( &operation ) );

    /* Generate an IV after it's already set. */
    PSA_ASSERT( psa_cipher_encrypt_setup( &operation, key, alg ) );
    PSA_ASSERT( psa_cipher_set_iv( &operation,
                                   iv, sizeof( iv ) ) );
    TEST_EQUAL( psa_cipher_generate_iv( &operation,
                                        buffer, sizeof( buffer ),
                                        &length ),
                PSA_ERROR_BAD_STATE );
    PSA_ASSERT( psa_cipher_abort( &operation ) );

    /* Set an IV without calling setup beforehand. */
    TEST_EQUAL( psa_cipher_set_iv( &operation,
                                   iv, sizeof( iv ) ),
                PSA_ERROR_BAD_STATE );
    PSA_ASSERT( psa_cipher_abort( &operation ) );

    /* Set an IV after it's already set. */
    PSA_ASSERT( psa_cipher_encrypt_setup( &operation, key, alg ) );
    PSA_ASSERT( psa_cipher_set_iv( &operation,
                                   iv, sizeof( iv ) ) );
    TEST_EQUAL( psa_cipher_set_iv( &operation,
                                   iv, sizeof( iv ) ),
                PSA_ERROR_BAD_STATE );
    PSA_ASSERT( psa_cipher_abort( &operation ) );

    /* Set an IV after it's already generated. */
    PSA_ASSERT( psa_cipher_encrypt_setup( &operation, key, alg ) );
    PSA_ASSERT( psa_cipher_generate_iv( &operation,
                                        buffer, sizeof( buffer ),
                                        &length ) );
    TEST_EQUAL( psa_cipher_set_iv( &operation,
                                   iv, sizeof( iv ) ),
                PSA_ERROR_BAD_STATE );
    PSA_ASSERT( psa_cipher_abort( &operation ) );

    /* Call update without calling setup beforehand. */
    TEST_EQUAL( psa_cipher_update( &operation,
                                   text, sizeof( text ),
                                   buffer, sizeof( buffer ),
                                   &length ),
                PSA_ERROR_BAD_STATE );
    PSA_ASSERT( psa_cipher_abort( &operation ) );

    /* Call update without an IV where an IV is required. */
    TEST_EQUAL( psa_cipher_update( &operation,
                                   text, sizeof( text ),
                                   buffer, sizeof( buffer ),
                                   &length ),
                PSA_ERROR_BAD_STATE );
    PSA_ASSERT( psa_cipher_abort( &operation ) );

    /* Call update after finish. */
    PSA_ASSERT( psa_cipher_encrypt_setup( &operation, key, alg ) );
    PSA_ASSERT( psa_cipher_set_iv( &operation,
                                   iv, sizeof( iv ) ) );
    PSA_ASSERT( psa_cipher_finish( &operation,
                                   buffer, sizeof( buffer ), &length ) );
    TEST_EQUAL( psa_cipher_update( &operation,
                                   text, sizeof( text ),
                                   buffer, sizeof( buffer ),
                                   &length ),
                PSA_ERROR_BAD_STATE );
    PSA_ASSERT( psa_cipher_abort( &operation ) );

    /* Call finish without calling setup beforehand. */
    TEST_EQUAL( psa_cipher_finish( &operation,
                                   buffer, sizeof( buffer ), &length ),
                PSA_ERROR_BAD_STATE );
    PSA_ASSERT( psa_cipher_abort( &operation ) );

    /* Call finish without an IV where an IV is required. */
    PSA_ASSERT( psa_cipher_encrypt_setup( &operation, key, alg ) );
    /* Not calling update means we are encrypting an empty buffer, which is OK
     * for cipher modes with padding. */
    TEST_EQUAL( psa_cipher_finish( &operation,
                                   buffer, sizeof( buffer ), &length ),
                PSA_ERROR_BAD_STATE );
    PSA_ASSERT( psa_cipher_abort( &operation ) );

    /* Call finish twice in a row. */
    PSA_ASSERT( psa_cipher_encrypt_setup( &operation, key, alg ) );
    PSA_ASSERT( psa_cipher_set_iv( &operation,
                                   iv, sizeof( iv ) ) );
    PSA_ASSERT( psa_cipher_finish( &operation,
                                   buffer, sizeof( buffer ), &length ) );
    TEST_EQUAL( psa_cipher_finish( &operation,
                                   buffer, sizeof( buffer ), &length ),
                PSA_ERROR_BAD_STATE );
    PSA_ASSERT( psa_cipher_abort( &operation ) );

    PSA_ASSERT( psa_destroy_key( key ) );

exit:
    psa_cipher_abort( &operation );
    PSA_DONE( );
}
/* END_CASE */

/* BEGIN_CASE */
void cipher_encrypt( int alg_arg, int key_type_arg,
                     data_t *key_data, data_t *iv,
                     data_t *input, data_t *expected_output,
                     int expected_status_arg )
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_status_t status;
    psa_key_type_t key_type = key_type_arg;
    psa_algorithm_t alg = alg_arg;
    psa_status_t expected_status = expected_status_arg;
    unsigned char *output = NULL;
    size_t output_buffer_size = 0;
    size_t function_output_length = 0;
    size_t total_output_length = 0;
    psa_cipher_operation_t operation = PSA_CIPHER_OPERATION_INIT;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;

    PSA_ASSERT( psa_crypto_init( ) );

    psa_set_key_usage_flags( &attributes, PSA_KEY_USAGE_ENCRYPT );
    psa_set_key_algorithm( &attributes, alg );
    psa_set_key_type( &attributes, key_type );

    PSA_ASSERT( psa_import_key( &attributes, key_data->x, key_data->len,
                                &key ) );

    PSA_ASSERT( psa_cipher_encrypt_setup( &operation, key, alg ) );

    if( iv->len > 0 )
    {
        PSA_ASSERT( psa_cipher_set_iv( &operation, iv->x, iv->len ) );
    }

    output_buffer_size = ( (size_t) input->len +
                           PSA_BLOCK_CIPHER_BLOCK_LENGTH( key_type ) );
    ASSERT_ALLOC( output, output_buffer_size );

    PSA_ASSERT( psa_cipher_update( &operation,
                                   input->x, input->len,
                                   output, output_buffer_size,
                                   &function_output_length ) );
    total_output_length += function_output_length;
    status = psa_cipher_finish( &operation,
                                output + total_output_length,
                                output_buffer_size - total_output_length,
                                &function_output_length );
    total_output_length += function_output_length;

    TEST_EQUAL( status, expected_status );
    if( expected_status == PSA_SUCCESS )
    {
        PSA_ASSERT( psa_cipher_abort( &operation ) );
        ASSERT_COMPARE( expected_output->x, expected_output->len,
                        output, total_output_length );
    }

exit:
    psa_cipher_abort( &operation );
    mbedtls_free( output );
    psa_destroy_key( key );
    PSA_DONE( );
}
/* END_CASE */

/* BEGIN_CASE */
void cipher_encrypt_multipart( int alg_arg, int key_type_arg,
                               data_t *key_data, data_t *iv,
                               data_t *input,
                               int first_part_size_arg,
                               int output1_length_arg, int output2_length_arg,
                               data_t *expected_output )
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_type_t key_type = key_type_arg;
    psa_algorithm_t alg = alg_arg;
    size_t first_part_size = first_part_size_arg;
    size_t output1_length = output1_length_arg;
    size_t output2_length = output2_length_arg;
    unsigned char *output = NULL;
    size_t output_buffer_size = 0;
    size_t function_output_length = 0;
    size_t total_output_length = 0;
    psa_cipher_operation_t operation = PSA_CIPHER_OPERATION_INIT;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;

    PSA_ASSERT( psa_crypto_init( ) );

    psa_set_key_usage_flags( &attributes, PSA_KEY_USAGE_ENCRYPT );
    psa_set_key_algorithm( &attributes, alg );
    psa_set_key_type( &attributes, key_type );

    PSA_ASSERT( psa_import_key( &attributes, key_data->x, key_data->len,
                                &key ) );

    PSA_ASSERT( psa_cipher_encrypt_setup( &operation, key, alg ) );

    if( iv->len > 0 )
    {
        PSA_ASSERT( psa_cipher_set_iv( &operation, iv->x, iv->len ) );
    }

    output_buffer_size = ( (size_t) input->len +
                           PSA_BLOCK_CIPHER_BLOCK_LENGTH( key_type ) );
    ASSERT_ALLOC( output, output_buffer_size );

    TEST_ASSERT( first_part_size <= input->len );
    PSA_ASSERT( psa_cipher_update( &operation, input->x, first_part_size,
                                   output, output_buffer_size,
                                   &function_output_length ) );
    TEST_ASSERT( function_output_length == output1_length );
    total_output_length += function_output_length;
    PSA_ASSERT( psa_cipher_update( &operation,
                                   input->x + first_part_size,
                                   input->len - first_part_size,
                                   output + total_output_length,
                                   output_buffer_size - total_output_length,
                                   &function_output_length ) );
    TEST_ASSERT( function_output_length == output2_length );
    total_output_length += function_output_length;
    PSA_ASSERT( psa_cipher_finish( &operation,
                                   output + total_output_length,
                                   output_buffer_size - total_output_length,
                                   &function_output_length ) );
    total_output_length += function_output_length;
    PSA_ASSERT( psa_cipher_abort( &operation ) );

    ASSERT_COMPARE( expected_output->x, expected_output->len,
                    output, total_output_length );

exit:
    psa_cipher_abort( &operation );
    mbedtls_free( output );
    psa_destroy_key( key );
    PSA_DONE( );
}
/* END_CASE */

/* BEGIN_CASE */
void cipher_decrypt_multipart( int alg_arg, int key_type_arg,
                               data_t *key_data, data_t *iv,
                               data_t *input,
                               int first_part_size_arg,
                               int output1_length_arg, int output2_length_arg,
                               data_t *expected_output )
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_type_t key_type = key_type_arg;
    psa_algorithm_t alg = alg_arg;
    size_t first_part_size = first_part_size_arg;
    size_t output1_length = output1_length_arg;
    size_t output2_length = output2_length_arg;
    unsigned char *output = NULL;
    size_t output_buffer_size = 0;
    size_t function_output_length = 0;
    size_t total_output_length = 0;
    psa_cipher_operation_t operation = PSA_CIPHER_OPERATION_INIT;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;

    PSA_ASSERT( psa_crypto_init( ) );

    psa_set_key_usage_flags( &attributes, PSA_KEY_USAGE_DECRYPT );
    psa_set_key_algorithm( &attributes, alg );
    psa_set_key_type( &attributes, key_type );

    PSA_ASSERT( psa_import_key( &attributes, key_data->x, key_data->len,
                                &key ) );

    PSA_ASSERT( psa_cipher_decrypt_setup( &operation, key, alg ) );

    if( iv->len > 0 )
    {
        PSA_ASSERT( psa_cipher_set_iv( &operation, iv->x, iv->len ) );
    }

    output_buffer_size = ( (size_t) input->len +
                           PSA_BLOCK_CIPHER_BLOCK_LENGTH( key_type ) );
    ASSERT_ALLOC( output, output_buffer_size );

    TEST_ASSERT( first_part_size <= input->len );
    PSA_ASSERT( psa_cipher_update( &operation,
                                   input->x, first_part_size,
                                   output, output_buffer_size,
                                   &function_output_length ) );
    TEST_ASSERT( function_output_length == output1_length );
    total_output_length += function_output_length;
    PSA_ASSERT( psa_cipher_update( &operation,
                                   input->x + first_part_size,
                                   input->len - first_part_size,
                                   output + total_output_length,
                                   output_buffer_size - total_output_length,
                                   &function_output_length ) );
    TEST_ASSERT( function_output_length == output2_length );
    total_output_length += function_output_length;
    PSA_ASSERT( psa_cipher_finish( &operation,
                                   output + total_output_length,
                                   output_buffer_size - total_output_length,
                                   &function_output_length ) );
    total_output_length += function_output_length;
    PSA_ASSERT( psa_cipher_abort( &operation ) );

    ASSERT_COMPARE( expected_output->x, expected_output->len,
                    output, total_output_length );

exit:
    psa_cipher_abort( &operation );
    mbedtls_free( output );
    psa_destroy_key( key );
    PSA_DONE( );
}
/* END_CASE */

/* BEGIN_CASE */
void cipher_decrypt( int alg_arg, int key_type_arg,
                     data_t *key_data, data_t *iv,
                     data_t *input, data_t *expected_output,
                     int expected_status_arg )
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_status_t status;
    psa_key_type_t key_type = key_type_arg;
    psa_algorithm_t alg = alg_arg;
    psa_status_t expected_status = expected_status_arg;
    unsigned char *output = NULL;
    size_t output_buffer_size = 0;
    size_t function_output_length = 0;
    size_t total_output_length = 0;
    psa_cipher_operation_t operation = PSA_CIPHER_OPERATION_INIT;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;

    PSA_ASSERT( psa_crypto_init( ) );

    psa_set_key_usage_flags( &attributes, PSA_KEY_USAGE_DECRYPT );
    psa_set_key_algorithm( &attributes, alg );
    psa_set_key_type( &attributes, key_type );

    PSA_ASSERT( psa_import_key( &attributes, key_data->x, key_data->len,
                                &key ) );

    PSA_ASSERT( psa_cipher_decrypt_setup( &operation, key, alg ) );

    if( iv->len > 0 )
    {
        PSA_ASSERT( psa_cipher_set_iv( &operation, iv->x, iv->len ) );
    }

    output_buffer_size = ( (size_t) input->len +
                           PSA_BLOCK_CIPHER_BLOCK_LENGTH( key_type ) );
    ASSERT_ALLOC( output, output_buffer_size );

    PSA_ASSERT( psa_cipher_update( &operation,
                                   input->x, input->len,
                                   output, output_buffer_size,
                                   &function_output_length ) );
    total_output_length += function_output_length;
    status = psa_cipher_finish( &operation,
                                output + total_output_length,
                                output_buffer_size - total_output_length,
                                &function_output_length );
    total_output_length += function_output_length;
    TEST_EQUAL( status, expected_status );

    if( expected_status == PSA_SUCCESS )
    {
        PSA_ASSERT( psa_cipher_abort( &operation ) );
        ASSERT_COMPARE( expected_output->x, expected_output->len,
                        output, total_output_length );
    }

exit:
    psa_cipher_abort( &operation );
    mbedtls_free( output );
    psa_destroy_key( key );
    PSA_DONE( );
}
/* END_CASE */

/* BEGIN_CASE */
void cipher_verify_output( int alg_arg, int key_type_arg,
                           data_t *key_data,
                           data_t *input )
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_type_t key_type = key_type_arg;
    psa_algorithm_t alg = alg_arg;
    unsigned char iv[16] = {0};
    size_t iv_size = 16;
    size_t iv_length = 0;
    unsigned char *output1 = NULL;
    size_t output1_size = 0;
    size_t output1_length = 0;
    unsigned char *output2 = NULL;
    size_t output2_size = 0;
    size_t output2_length = 0;
    size_t function_output_length = 0;
    psa_cipher_operation_t operation1 = PSA_CIPHER_OPERATION_INIT;
    psa_cipher_operation_t operation2 = PSA_CIPHER_OPERATION_INIT;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;

    PSA_ASSERT( psa_crypto_init( ) );

    psa_set_key_usage_flags( &attributes, PSA_KEY_USAGE_ENCRYPT | PSA_KEY_USAGE_DECRYPT );
    psa_set_key_algorithm( &attributes, alg );
    psa_set_key_type( &attributes, key_type );

    PSA_ASSERT( psa_import_key( &attributes, key_data->x, key_data->len,
                                &key ) );

    PSA_ASSERT( psa_cipher_encrypt_setup( &operation1, key, alg ) );
    PSA_ASSERT( psa_cipher_decrypt_setup( &operation2, key, alg ) );

    if( alg != PSA_ALG_ECB_NO_PADDING )
    {
        PSA_ASSERT( psa_cipher_generate_iv( &operation1,
                                            iv, iv_size,
                                            &iv_length ) );
    }
    output1_size = ( (size_t) input->len +
                     PSA_BLOCK_CIPHER_BLOCK_LENGTH( key_type ) );
    ASSERT_ALLOC( output1, output1_size );

    PSA_ASSERT( psa_cipher_update( &operation1, input->x, input->len,
                                   output1, output1_size,
                                   &output1_length ) );
    PSA_ASSERT( psa_cipher_finish( &operation1,
                                   output1 + output1_length,
                                   output1_size - output1_length,
                                   &function_output_length ) );

    output1_length += function_output_length;

    PSA_ASSERT( psa_cipher_abort( &operation1 ) );

    output2_size = output1_length;
    ASSERT_ALLOC( output2, output2_size );

    if( iv_length > 0 )
    {
        PSA_ASSERT( psa_cipher_set_iv( &operation2,
                                       iv, iv_length ) );
    }

    PSA_ASSERT( psa_cipher_update( &operation2, output1, output1_length,
                                   output2, output2_size,
                                   &output2_length ) );
    function_output_length = 0;
    PSA_ASSERT( psa_cipher_finish( &operation2,
                                   output2 + output2_length,
                                   output2_size - output2_length,
                                   &function_output_length ) );

    output2_length += function_output_length;

    PSA_ASSERT( psa_cipher_abort( &operation2 ) );

    ASSERT_COMPARE( input->x, input->len, output2, output2_length );

exit:
    psa_cipher_abort( &operation1 );
    psa_cipher_abort( &operation2 );
    mbedtls_free( output1 );
    mbedtls_free( output2 );
    psa_destroy_key( key );
    PSA_DONE( );
}
/* END_CASE */

/* BEGIN_CASE */
void cipher_verify_output_multipart( int alg_arg,
                                     int key_type_arg,
                                     data_t *key_data,
                                     data_t *input,
                                     int first_part_size_arg )
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_type_t key_type = key_type_arg;
    psa_algorithm_t alg = alg_arg;
    size_t first_part_size = first_part_size_arg;
    unsigned char iv[16] = {0};
    size_t iv_size = 16;
    size_t iv_length = 0;
    unsigned char *output1 = NULL;
    size_t output1_buffer_size = 0;
    size_t output1_length = 0;
    unsigned char *output2 = NULL;
    size_t output2_buffer_size = 0;
    size_t output2_length = 0;
    size_t function_output_length;
    psa_cipher_operation_t operation1 = PSA_CIPHER_OPERATION_INIT;
    psa_cipher_operation_t operation2 = PSA_CIPHER_OPERATION_INIT;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;

    PSA_ASSERT( psa_crypto_init( ) );

    psa_set_key_usage_flags( &attributes, PSA_KEY_USAGE_ENCRYPT | PSA_KEY_USAGE_DECRYPT );
    psa_set_key_algorithm( &attributes, alg );
    psa_set_key_type( &attributes, key_type );

    PSA_ASSERT( psa_import_key( &attributes, key_data->x, key_data->len,
                                &key ) );

    PSA_ASSERT( psa_cipher_encrypt_setup( &operation1, key, alg ) );
    PSA_ASSERT( psa_cipher_decrypt_setup( &operation2, key, alg ) );

    if( alg != PSA_ALG_ECB_NO_PADDING )
    {
        PSA_ASSERT( psa_cipher_generate_iv( &operation1,
                                            iv, iv_size,
                                            &iv_length ) );
    }

    output1_buffer_size = ( (size_t) input->len +
                            PSA_BLOCK_CIPHER_BLOCK_LENGTH( key_type ) );
    ASSERT_ALLOC( output1, output1_buffer_size );

    TEST_ASSERT( first_part_size <= input->len );

    PSA_ASSERT( psa_cipher_update( &operation1, input->x, first_part_size,
                                   output1, output1_buffer_size,
                                   &function_output_length ) );
    output1_length += function_output_length;

    PSA_ASSERT( psa_cipher_update( &operation1,
                                   input->x + first_part_size,
                                   input->len - first_part_size,
                                   output1, output1_buffer_size,
                                   &function_output_length ) );
    output1_length += function_output_length;

    PSA_ASSERT( psa_cipher_finish( &operation1,
                                   output1 + output1_length,
                                   output1_buffer_size - output1_length,
                                   &function_output_length ) );
    output1_length += function_output_length;

    PSA_ASSERT( psa_cipher_abort( &operation1 ) );

    output2_buffer_size = output1_length;
    ASSERT_ALLOC( output2, output2_buffer_size );

    if( iv_length > 0 )
    {
        PSA_ASSERT( psa_cipher_set_iv( &operation2,
                                       iv, iv_length ) );
    }

    PSA_ASSERT( psa_cipher_update( &operation2, output1, first_part_size,
                                   output2, output2_buffer_size,
                                   &function_output_length ) );
    output2_length += function_output_length;

    PSA_ASSERT( psa_cipher_update( &operation2,
                                   output1 + first_part_size,
                                   output1_length - first_part_size,
                                   output2, output2_buffer_size,
                                   &function_output_length ) );
    output2_length += function_output_length;

    PSA_ASSERT( psa_cipher_finish( &operation2,
                                   output2 + output2_length,
                                   output2_buffer_size - output2_length,
                                   &function_output_length ) );
    output2_length += function_output_length;

    PSA_ASSERT( psa_cipher_abort( &operation2 ) );

    ASSERT_COMPARE( input->x, input->len, output2, output2_length );

exit:
    psa_cipher_abort( &operation1 );
    psa_cipher_abort( &operation2 );
    mbedtls_free( output1 );
    mbedtls_free( output2 );
    psa_destroy_key( key );
    PSA_DONE( );
}
/* END_CASE */

/* BEGIN_CASE */
void aead_encrypt_decrypt( int key_type_arg, data_t *key_data,
                           int alg_arg,
                           data_t *nonce,
                           data_t *additional_data,
                           data_t *input_data,
                           int expected_result_arg )
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_type_t key_type = key_type_arg;
    psa_algorithm_t alg = alg_arg;
    unsigned char *output_data = NULL;
    size_t output_size = 0;
    size_t output_length = 0;
    unsigned char *output_data2 = NULL;
    size_t output_length2 = 0;
    size_t tag_length = PSA_AEAD_TAG_LENGTH( alg );
    psa_status_t status = PSA_ERROR_GENERIC_ERROR;
    psa_status_t expected_result = expected_result_arg;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;

    output_size = input_data->len + tag_length;
    /* For all currently defined algorithms, PSA_AEAD_ENCRYPT_OUTPUT_SIZE
     * should be exact. */
    if( expected_result != PSA_ERROR_INVALID_ARGUMENT )
        TEST_EQUAL( output_size,
                    PSA_AEAD_ENCRYPT_OUTPUT_SIZE( alg, input_data->len ) );
    ASSERT_ALLOC( output_data, output_size );

    PSA_ASSERT( psa_crypto_init( ) );

    psa_set_key_usage_flags( &attributes, PSA_KEY_USAGE_ENCRYPT | PSA_KEY_USAGE_DECRYPT );
    psa_set_key_algorithm( &attributes, alg );
    psa_set_key_type( &attributes, key_type );

    PSA_ASSERT( psa_import_key( &attributes, key_data->x, key_data->len,
                                &key ) );

    status = psa_aead_encrypt( key, alg,
                               nonce->x, nonce->len,
                               additional_data->x,
                               additional_data->len,
                               input_data->x, input_data->len,
                               output_data, output_size,
                               &output_length );

    /* If the operation is not supported, just skip and not fail in case the
     * encryption involves a common limitation of cryptography hardwares and
     * an alternative implementation. */
    if( status == PSA_ERROR_NOT_SUPPORTED )
    {
        MBEDTLS_TEST_PSA_SKIP_IF_ALT_AES_192( key_type, key_data->len * 8 );
        MBEDTLS_TEST_PSA_SKIP_IF_ALT_GCM_NOT_12BYTES_NONCE( alg, nonce->len );
    }

    TEST_EQUAL( status, expected_result );

    if( PSA_SUCCESS == expected_result )
    {
        ASSERT_ALLOC( output_data2, output_length );

        /* For all currently defined algorithms, PSA_AEAD_DECRYPT_OUTPUT_SIZE
         * should be exact. */
        TEST_EQUAL( input_data->len,
                    PSA_AEAD_DECRYPT_OUTPUT_SIZE( alg, output_length ) );

        TEST_EQUAL( psa_aead_decrypt( key, alg,
                                      nonce->x, nonce->len,
                                      additional_data->x,
                                      additional_data->len,
                                      output_data, output_length,
                                      output_data2, output_length,
                                      &output_length2 ),
                    expected_result );

        ASSERT_COMPARE( input_data->x, input_data->len,
                        output_data2, output_length2 );
    }

exit:
    psa_destroy_key( key );
    mbedtls_free( output_data );
    mbedtls_free( output_data2 );
    PSA_DONE( );
}
/* END_CASE */

/* BEGIN_CASE */
void aead_encrypt( int key_type_arg, data_t *key_data,
                   int alg_arg,
                   data_t *nonce,
                   data_t *additional_data,
                   data_t *input_data,
                   data_t *expected_result )
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_type_t key_type = key_type_arg;
    psa_algorithm_t alg = alg_arg;
    unsigned char *output_data = NULL;
    size_t output_size = 0;
    size_t output_length = 0;
    size_t tag_length = PSA_AEAD_TAG_LENGTH( alg );
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
    psa_status_t status = PSA_ERROR_GENERIC_ERROR;

    output_size = input_data->len + tag_length;
    /* For all currently defined algorithms, PSA_AEAD_ENCRYPT_OUTPUT_SIZE
     * should be exact. */
    TEST_EQUAL( output_size,
                PSA_AEAD_ENCRYPT_OUTPUT_SIZE( alg, input_data->len ) );
    ASSERT_ALLOC( output_data, output_size );

    PSA_ASSERT( psa_crypto_init( ) );

    psa_set_key_usage_flags( &attributes, PSA_KEY_USAGE_ENCRYPT  );
    psa_set_key_algorithm( &attributes, alg );
    psa_set_key_type( &attributes, key_type );

    PSA_ASSERT( psa_import_key( &attributes, key_data->x, key_data->len,
                                &key ) );

    status = psa_aead_encrypt( key, alg,
                               nonce->x, nonce->len,
                               additional_data->x, additional_data->len,
                               input_data->x, input_data->len,
                               output_data, output_size,
                               &output_length );

    /* If the operation is not supported, just skip and not fail in case the
     * encryption involves a common limitation of cryptography hardwares and
     * an alternative implementation. */
    if( status == PSA_ERROR_NOT_SUPPORTED )
    {
        MBEDTLS_TEST_PSA_SKIP_IF_ALT_AES_192( key_type, key_data->len * 8 );
        MBEDTLS_TEST_PSA_SKIP_IF_ALT_GCM_NOT_12BYTES_NONCE( alg, nonce->len );
    }

    PSA_ASSERT( status );
    ASSERT_COMPARE( expected_result->x, expected_result->len,
                    output_data, output_length );

exit:
    psa_destroy_key( key );
    mbedtls_free( output_data );
    PSA_DONE( );
}
/* END_CASE */

/* BEGIN_CASE */
void aead_decrypt( int key_type_arg, data_t *key_data,
                   int alg_arg,
                   data_t *nonce,
                   data_t *additional_data,
                   data_t *input_data,
                   data_t *expected_data,
                   int expected_result_arg )
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_type_t key_type = key_type_arg;
    psa_algorithm_t alg = alg_arg;
    unsigned char *output_data = NULL;
    size_t output_size = 0;
    size_t output_length = 0;
    size_t tag_length = PSA_AEAD_TAG_LENGTH( alg );
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
    psa_status_t expected_result = expected_result_arg;
    psa_status_t status = PSA_ERROR_GENERIC_ERROR;

    output_size = input_data->len - tag_length;
    /* For all currently defined algorithms, PSA_AEAD_DECRYPT_OUTPUT_SIZE
     * should be exact. */
    if( expected_result != PSA_ERROR_INVALID_ARGUMENT )
        TEST_EQUAL( output_size,
                    PSA_AEAD_DECRYPT_OUTPUT_SIZE( alg, input_data->len ) );
    ASSERT_ALLOC( output_data, output_size );

    PSA_ASSERT( psa_crypto_init( ) );

    psa_set_key_usage_flags( &attributes, PSA_KEY_USAGE_DECRYPT  );
    psa_set_key_algorithm( &attributes, alg );
    psa_set_key_type( &attributes, key_type );

    PSA_ASSERT( psa_import_key( &attributes, key_data->x, key_data->len,
                                &key ) );

    status = psa_aead_decrypt( key, alg,
                               nonce->x, nonce->len,
                               additional_data->x,
                               additional_data->len,
                               input_data->x, input_data->len,
                               output_data, output_size,
                               &output_length );

    /* If the operation is not supported, just skip and not fail in case the
     * decryption involves a common limitation of cryptography hardwares and
     * an alternative implementation. */
    if( status == PSA_ERROR_NOT_SUPPORTED )
    {
        MBEDTLS_TEST_PSA_SKIP_IF_ALT_AES_192( key_type, key_data->len * 8 );
        MBEDTLS_TEST_PSA_SKIP_IF_ALT_GCM_NOT_12BYTES_NONCE( alg, nonce->len );
    }

    TEST_EQUAL( status, expected_result );

    if( expected_result == PSA_SUCCESS )
        ASSERT_COMPARE( expected_data->x, expected_data->len,
                        output_data, output_length );

exit:
    psa_destroy_key( key );
    mbedtls_free( output_data );
    PSA_DONE( );
}
/* END_CASE */

/* BEGIN_CASE */
void signature_size( int type_arg,
                     int bits,
                     int alg_arg,
                     int expected_size_arg )
{
    psa_key_type_t type = type_arg;
    psa_algorithm_t alg = alg_arg;
    size_t actual_size = PSA_SIGN_OUTPUT_SIZE( type, bits, alg );

    TEST_EQUAL( actual_size, (size_t) expected_size_arg );
#if defined(MBEDTLS_TEST_DEPRECATED)
    TEST_EQUAL( actual_size,
                PSA_ASYMMETRIC_SIGN_OUTPUT_SIZE( type, bits, alg ) );
#endif /* MBEDTLS_TEST_DEPRECATED */

exit:
    ;
}
/* END_CASE */

/* BEGIN_CASE */
void sign_deterministic( int key_type_arg, data_t *key_data,
                         int alg_arg, data_t *input_data,
                         data_t *output_data )
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_type_t key_type = key_type_arg;
    psa_algorithm_t alg = alg_arg;
    size_t key_bits;
    unsigned char *signature = NULL;
    size_t signature_size;
    size_t signature_length = 0xdeadbeef;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;

    PSA_ASSERT( psa_crypto_init( ) );

    psa_set_key_usage_flags( &attributes, PSA_KEY_USAGE_SIGN_HASH );
    psa_set_key_algorithm( &attributes, alg );
    psa_set_key_type( &attributes, key_type );

    PSA_ASSERT( psa_import_key( &attributes, key_data->x, key_data->len,
                                &key ) );
    PSA_ASSERT( psa_get_key_attributes( key, &attributes ) );
    key_bits = psa_get_key_bits( &attributes );

    /* Allocate a buffer which has the size advertized by the
     * library. */
    signature_size = PSA_SIGN_OUTPUT_SIZE( key_type,
                                                      key_bits, alg );
    TEST_ASSERT( signature_size != 0 );
    TEST_ASSERT( signature_size <= PSA_SIGNATURE_MAX_SIZE );
    ASSERT_ALLOC( signature, signature_size );

    /* Perform the signature. */
    PSA_ASSERT( psa_sign_hash( key, alg,
                               input_data->x, input_data->len,
                               signature, signature_size,
                               &signature_length ) );
    /* Verify that the signature is what is expected. */
    ASSERT_COMPARE( output_data->x, output_data->len,
                    signature, signature_length );

#if defined(MBEDTLS_TEST_DEPRECATED)
    memset( signature, 0, signature_size );
    signature_length = INVALID_EXPORT_LENGTH;
    PSA_ASSERT( psa_asymmetric_sign( key, alg,
                                     input_data->x, input_data->len,
                                     signature, signature_size,
                                     &signature_length ) );
    ASSERT_COMPARE( output_data->x, output_data->len,
                    signature, signature_length );
#endif /* MBEDTLS_TEST_DEPRECATED */

exit:
    /*
     * Key attributes may have been returned by psa_get_key_attributes()
     * thus reset them as required.
     */
    psa_reset_key_attributes( &attributes );

    psa_destroy_key( key );
    mbedtls_free( signature );
    PSA_DONE( );
}
/* END_CASE */

/* BEGIN_CASE */
void sign_fail( int key_type_arg, data_t *key_data,
                int alg_arg, data_t *input_data,
                int signature_size_arg, int expected_status_arg )
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_type_t key_type = key_type_arg;
    psa_algorithm_t alg = alg_arg;
    size_t signature_size = signature_size_arg;
    psa_status_t actual_status;
    psa_status_t expected_status = expected_status_arg;
    unsigned char *signature = NULL;
    size_t signature_length = 0xdeadbeef;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;

    ASSERT_ALLOC( signature, signature_size );

    PSA_ASSERT( psa_crypto_init( ) );

    psa_set_key_usage_flags( &attributes, PSA_KEY_USAGE_SIGN_HASH );
    psa_set_key_algorithm( &attributes, alg );
    psa_set_key_type( &attributes, key_type );

    PSA_ASSERT( psa_import_key( &attributes, key_data->x, key_data->len,
                                &key ) );

    actual_status = psa_sign_hash( key, alg,
                                   input_data->x, input_data->len,
                                   signature, signature_size,
                                   &signature_length );
    TEST_EQUAL( actual_status, expected_status );
    /* The value of *signature_length is unspecified on error, but
     * whatever it is, it should be less than signature_size, so that
     * if the caller tries to read *signature_length bytes without
     * checking the error code then they don't overflow a buffer. */
    TEST_ASSERT( signature_length <= signature_size );

#if defined(MBEDTLS_TEST_DEPRECATED)
    signature_length = INVALID_EXPORT_LENGTH;
    TEST_EQUAL( psa_asymmetric_sign( key, alg,
                                     input_data->x, input_data->len,
                                     signature, signature_size,
                                     &signature_length ),
                expected_status );
    TEST_ASSERT( signature_length <= signature_size );
#endif /* MBEDTLS_TEST_DEPRECATED */

exit:
    psa_reset_key_attributes( &attributes );
    psa_destroy_key( key );
    mbedtls_free( signature );
    PSA_DONE( );
}
/* END_CASE */

/* BEGIN_CASE */
void sign_verify( int key_type_arg, data_t *key_data,
                  int alg_arg, data_t *input_data )
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_type_t key_type = key_type_arg;
    psa_algorithm_t alg = alg_arg;
    size_t key_bits;
    unsigned char *signature = NULL;
    size_t signature_size;
    size_t signature_length = 0xdeadbeef;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;

    PSA_ASSERT( psa_crypto_init( ) );

    psa_set_key_usage_flags( &attributes, PSA_KEY_USAGE_SIGN_HASH | PSA_KEY_USAGE_VERIFY_HASH );
    psa_set_key_algorithm( &attributes, alg );
    psa_set_key_type( &attributes, key_type );

    PSA_ASSERT( psa_import_key( &attributes, key_data->x, key_data->len,
                                &key ) );
    PSA_ASSERT( psa_get_key_attributes( key, &attributes ) );
    key_bits = psa_get_key_bits( &attributes );

    /* Allocate a buffer which has the size advertized by the
     * library. */
    signature_size = PSA_SIGN_OUTPUT_SIZE( key_type,
                                                      key_bits, alg );
    TEST_ASSERT( signature_size != 0 );
    TEST_ASSERT( signature_size <= PSA_SIGNATURE_MAX_SIZE );
    ASSERT_ALLOC( signature, signature_size );

    /* Perform the signature. */
    PSA_ASSERT( psa_sign_hash( key, alg,
                               input_data->x, input_data->len,
                               signature, signature_size,
                               &signature_length ) );
    /* Check that the signature length looks sensible. */
    TEST_ASSERT( signature_length <= signature_size );
    TEST_ASSERT( signature_length > 0 );

    /* Use the library to verify that the signature is correct. */
    PSA_ASSERT( psa_verify_hash( key, alg,
                                 input_data->x, input_data->len,
                                 signature, signature_length ) );

    if( input_data->len != 0 )
    {
        /* Flip a bit in the input and verify that the signature is now
         * detected as invalid. Flip a bit at the beginning, not at the end,
         * because ECDSA may ignore the last few bits of the input. */
        input_data->x[0] ^= 1;
        TEST_EQUAL( psa_verify_hash( key, alg,
                                     input_data->x, input_data->len,
                                     signature, signature_length ),
                    PSA_ERROR_INVALID_SIGNATURE );
    }

exit:
    /*
     * Key attributes may have been returned by psa_get_key_attributes()
     * thus reset them as required.
     */
    psa_reset_key_attributes( &attributes );

    psa_destroy_key( key );
    mbedtls_free( signature );
    PSA_DONE( );
}
/* END_CASE */

/* BEGIN_CASE */
void asymmetric_verify( int key_type_arg, data_t *key_data,
                        int alg_arg, data_t *hash_data,
                        data_t *signature_data )
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_type_t key_type = key_type_arg;
    psa_algorithm_t alg = alg_arg;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;

    TEST_ASSERT( signature_data->len <= PSA_SIGNATURE_MAX_SIZE );

    PSA_ASSERT( psa_crypto_init( ) );

    psa_set_key_usage_flags( &attributes, PSA_KEY_USAGE_VERIFY_HASH );
    psa_set_key_algorithm( &attributes, alg );
    psa_set_key_type( &attributes, key_type );

    PSA_ASSERT( psa_import_key( &attributes, key_data->x, key_data->len,
                                &key ) );

    PSA_ASSERT( psa_verify_hash( key, alg,
                                 hash_data->x, hash_data->len,
                                 signature_data->x, signature_data->len ) );

#if defined(MBEDTLS_TEST_DEPRECATED)
    PSA_ASSERT( psa_asymmetric_verify( key, alg,
                                       hash_data->x, hash_data->len,
                                       signature_data->x,
                                       signature_data->len ) );

#endif /* MBEDTLS_TEST_DEPRECATED */

exit:
    psa_reset_key_attributes( &attributes );
    psa_destroy_key( key );
    PSA_DONE( );
}
/* END_CASE */

/* BEGIN_CASE */
void asymmetric_verify_fail( int key_type_arg, data_t *key_data,
                             int alg_arg, data_t *hash_data,
                             data_t *signature_data,
                             int expected_status_arg )
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_type_t key_type = key_type_arg;
    psa_algorithm_t alg = alg_arg;
    psa_status_t actual_status;
    psa_status_t expected_status = expected_status_arg;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;

    PSA_ASSERT( psa_crypto_init( ) );

    psa_set_key_usage_flags( &attributes, PSA_KEY_USAGE_VERIFY_HASH );
    psa_set_key_algorithm( &attributes, alg );
    psa_set_key_type( &attributes, key_type );

    PSA_ASSERT( psa_import_key( &attributes, key_data->x, key_data->len,
                                &key ) );

    actual_status = psa_verify_hash( key, alg,
                                     hash_data->x, hash_data->len,
                                     signature_data->x, signature_data->len );
    TEST_EQUAL( actual_status, expected_status );

#if defined(MBEDTLS_TEST_DEPRECATED)
    TEST_EQUAL( psa_asymmetric_verify( key, alg,
                                       hash_data->x, hash_data->len,
                                       signature_data->x, signature_data->len ),
                expected_status );
#endif /* MBEDTLS_TEST_DEPRECATED */

exit:
    psa_reset_key_attributes( &attributes );
    psa_destroy_key( key );
    PSA_DONE( );
}
/* END_CASE */

/* BEGIN_CASE */
void asymmetric_encrypt( int key_type_arg,
                         data_t *key_data,
                         int alg_arg,
                         data_t *input_data,
                         data_t *label,
                         int expected_output_length_arg,
                         int expected_status_arg )
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_type_t key_type = key_type_arg;
    psa_algorithm_t alg = alg_arg;
    size_t expected_output_length = expected_output_length_arg;
    size_t key_bits;
    unsigned char *output = NULL;
    size_t output_size;
    size_t output_length = ~0;
    psa_status_t actual_status;
    psa_status_t expected_status = expected_status_arg;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;

    PSA_ASSERT( psa_crypto_init( ) );

    /* Import the key */
    psa_set_key_usage_flags( &attributes, PSA_KEY_USAGE_ENCRYPT );
    psa_set_key_algorithm( &attributes, alg );
    psa_set_key_type( &attributes, key_type );
    PSA_ASSERT( psa_import_key( &attributes, key_data->x, key_data->len,
                                &key ) );

    /* Determine the maximum output length */
    PSA_ASSERT( psa_get_key_attributes( key, &attributes ) );
    key_bits = psa_get_key_bits( &attributes );
    output_size = PSA_ASYMMETRIC_ENCRYPT_OUTPUT_SIZE( key_type, key_bits, alg );
    ASSERT_ALLOC( output, output_size );

    /* Encrypt the input */
    actual_status = psa_asymmetric_encrypt( key, alg,
                                            input_data->x, input_data->len,
                                            label->x, label->len,
                                            output, output_size,
                                            &output_length );
    TEST_EQUAL( actual_status, expected_status );
    TEST_EQUAL( output_length, expected_output_length );

    /* If the label is empty, the test framework puts a non-null pointer
     * in label->x. Test that a null pointer works as well. */
    if( label->len == 0 )
    {
        output_length = ~0;
        if( output_size != 0 )
            memset( output, 0, output_size );
        actual_status = psa_asymmetric_encrypt( key, alg,
                                                input_data->x, input_data->len,
                                                NULL, label->len,
                                                output, output_size,
                                                &output_length );
        TEST_EQUAL( actual_status, expected_status );
        TEST_EQUAL( output_length, expected_output_length );
    }

exit:
    /*
     * Key attributes may have been returned by psa_get_key_attributes()
     * thus reset them as required.
     */
    psa_reset_key_attributes( &attributes );

    psa_destroy_key( key );
    mbedtls_free( output );
    PSA_DONE( );
}
/* END_CASE */

/* BEGIN_CASE */
void asymmetric_encrypt_decrypt( int key_type_arg,
                                 data_t *key_data,
                                 int alg_arg,
                                 data_t *input_data,
                                 data_t *label )
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_type_t key_type = key_type_arg;
    psa_algorithm_t alg = alg_arg;
    size_t key_bits;
    unsigned char *output = NULL;
    size_t output_size;
    size_t output_length = ~0;
    unsigned char *output2 = NULL;
    size_t output2_size;
    size_t output2_length = ~0;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;

    PSA_ASSERT( psa_crypto_init( ) );

    psa_set_key_usage_flags( &attributes, PSA_KEY_USAGE_ENCRYPT | PSA_KEY_USAGE_DECRYPT );
    psa_set_key_algorithm( &attributes, alg );
    psa_set_key_type( &attributes, key_type );

    PSA_ASSERT( psa_import_key( &attributes, key_data->x, key_data->len,
                                &key ) );

    /* Determine the maximum ciphertext length */
    PSA_ASSERT( psa_get_key_attributes( key, &attributes ) );
    key_bits = psa_get_key_bits( &attributes );
    output_size = PSA_ASYMMETRIC_ENCRYPT_OUTPUT_SIZE( key_type, key_bits, alg );
    ASSERT_ALLOC( output, output_size );
    output2_size = input_data->len;
    ASSERT_ALLOC( output2, output2_size );

    /* We test encryption by checking that encrypt-then-decrypt gives back
     * the original plaintext because of the non-optional random
     * part of encryption process which prevents using fixed vectors. */
    PSA_ASSERT( psa_asymmetric_encrypt( key, alg,
                                        input_data->x, input_data->len,
                                        label->x, label->len,
                                        output, output_size,
                                        &output_length ) );
    /* We don't know what ciphertext length to expect, but check that
     * it looks sensible. */
    TEST_ASSERT( output_length <= output_size );

    PSA_ASSERT( psa_asymmetric_decrypt( key, alg,
                                        output, output_length,
                                        label->x, label->len,
                                        output2, output2_size,
                                        &output2_length ) );
    ASSERT_COMPARE( input_data->x, input_data->len,
                    output2, output2_length );

exit:
    /*
     * Key attributes may have been returned by psa_get_key_attributes()
     * thus reset them as required.
     */
    psa_reset_key_attributes( &attributes );

    psa_destroy_key( key );
    mbedtls_free( output );
    mbedtls_free( output2 );
    PSA_DONE( );
}
/* END_CASE */

/* BEGIN_CASE */
void asymmetric_decrypt( int key_type_arg,
                         data_t *key_data,
                         int alg_arg,
                         data_t *input_data,
                         data_t *label,
                         data_t *expected_data )
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_type_t key_type = key_type_arg;
    psa_algorithm_t alg = alg_arg;
    unsigned char *output = NULL;
    size_t output_size = 0;
    size_t output_length = ~0;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;

    output_size = expected_data->len;
    ASSERT_ALLOC( output, output_size );

    PSA_ASSERT( psa_crypto_init( ) );

    psa_set_key_usage_flags( &attributes, PSA_KEY_USAGE_DECRYPT );
    psa_set_key_algorithm( &attributes, alg );
    psa_set_key_type( &attributes, key_type );

    PSA_ASSERT( psa_import_key( &attributes, key_data->x, key_data->len,
                                &key ) );

    PSA_ASSERT( psa_asymmetric_decrypt( key, alg,
                                        input_data->x, input_data->len,
                                        label->x, label->len,
                                        output,
                                        output_size,
                                        &output_length ) );
    ASSERT_COMPARE( expected_data->x, expected_data->len,
                    output, output_length );

    /* If the label is empty, the test framework puts a non-null pointer
     * in label->x. Test that a null pointer works as well. */
    if( label->len == 0 )
    {
        output_length = ~0;
        if( output_size != 0 )
            memset( output, 0, output_size );
        PSA_ASSERT( psa_asymmetric_decrypt( key, alg,
                                            input_data->x, input_data->len,
                                            NULL, label->len,
                                            output,
                                            output_size,
                                            &output_length ) );
        ASSERT_COMPARE( expected_data->x, expected_data->len,
                        output, output_length );
    }

exit:
    psa_reset_key_attributes( &attributes );
    psa_destroy_key( key );
    mbedtls_free( output );
    PSA_DONE( );
}
/* END_CASE */

/* BEGIN_CASE */
void asymmetric_decrypt_fail( int key_type_arg,
                              data_t *key_data,
                              int alg_arg,
                              data_t *input_data,
                              data_t *label,
                              int output_size_arg,
                              int expected_status_arg  )
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_type_t key_type = key_type_arg;
    psa_algorithm_t alg = alg_arg;
    unsigned char *output = NULL;
    size_t output_size = output_size_arg;
    size_t output_length = ~0;
    psa_status_t actual_status;
    psa_status_t expected_status = expected_status_arg;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;

    ASSERT_ALLOC( output, output_size );

    PSA_ASSERT( psa_crypto_init( ) );

    psa_set_key_usage_flags( &attributes, PSA_KEY_USAGE_DECRYPT );
    psa_set_key_algorithm( &attributes, alg );
    psa_set_key_type( &attributes, key_type );

    PSA_ASSERT( psa_import_key( &attributes, key_data->x, key_data->len,
                                &key ) );

    actual_status = psa_asymmetric_decrypt( key, alg,
                                            input_data->x, input_data->len,
                                            label->x, label->len,
                                            output, output_size,
                                            &output_length );
    TEST_EQUAL( actual_status, expected_status );
    TEST_ASSERT( output_length <= output_size );

    /* If the label is empty, the test framework puts a non-null pointer
     * in label->x. Test that a null pointer works as well. */
    if( label->len == 0 )
    {
        output_length = ~0;
        if( output_size != 0 )
            memset( output, 0, output_size );
        actual_status = psa_asymmetric_decrypt( key, alg,
                                                input_data->x, input_data->len,
                                                NULL, label->len,
                                                output, output_size,
                                                &output_length );
        TEST_EQUAL( actual_status, expected_status );
        TEST_ASSERT( output_length <= output_size );
    }

exit:
    psa_reset_key_attributes( &attributes );
    psa_destroy_key( key );
    mbedtls_free( output );
    PSA_DONE( );
}
/* END_CASE */

/* BEGIN_CASE */
void key_derivation_init( )
{
    /* Test each valid way of initializing the object, except for `= {0}`, as
     * Clang 5 complains when `-Wmissing-field-initializers` is used, even
     * though it's OK by the C standard. We could test for this, but we'd need
     * to supress the Clang warning for the test. */
    size_t capacity;
    psa_key_derivation_operation_t func = psa_key_derivation_operation_init( );
    psa_key_derivation_operation_t init = PSA_KEY_DERIVATION_OPERATION_INIT;
    psa_key_derivation_operation_t zero;

    memset( &zero, 0, sizeof( zero ) );

    /* A default operation should not be able to report its capacity. */
    TEST_EQUAL( psa_key_derivation_get_capacity( &func, &capacity ),
                PSA_ERROR_BAD_STATE );
    TEST_EQUAL( psa_key_derivation_get_capacity( &init, &capacity ),
                PSA_ERROR_BAD_STATE );
    TEST_EQUAL( psa_key_derivation_get_capacity( &zero, &capacity ),
                PSA_ERROR_BAD_STATE );

    /* A default operation should be abortable without error. */
    PSA_ASSERT( psa_key_derivation_abort(&func) );
    PSA_ASSERT( psa_key_derivation_abort(&init) );
    PSA_ASSERT( psa_key_derivation_abort(&zero) );
}
/* END_CASE */

/* BEGIN_CASE */
void derive_setup( int alg_arg, int expected_status_arg )
{
    psa_algorithm_t alg = alg_arg;
    psa_status_t expected_status = expected_status_arg;
    psa_key_derivation_operation_t operation = PSA_KEY_DERIVATION_OPERATION_INIT;

    PSA_ASSERT( psa_crypto_init( ) );

    TEST_EQUAL( psa_key_derivation_setup( &operation, alg ),
                expected_status );

exit:
    psa_key_derivation_abort( &operation );
    PSA_DONE( );
}
/* END_CASE */

/* BEGIN_CASE */
void derive_set_capacity( int alg_arg, int capacity_arg,
                          int expected_status_arg )
{
    psa_algorithm_t alg = alg_arg;
    size_t capacity = capacity_arg;
    psa_status_t expected_status = expected_status_arg;
    psa_key_derivation_operation_t operation = PSA_KEY_DERIVATION_OPERATION_INIT;

    PSA_ASSERT( psa_crypto_init( ) );

    PSA_ASSERT( psa_key_derivation_setup( &operation, alg ) );

    TEST_EQUAL( psa_key_derivation_set_capacity( &operation, capacity ),
                expected_status );

exit:
    psa_key_derivation_abort( &operation );
    PSA_DONE( );
}
/* END_CASE */

/* BEGIN_CASE */
void derive_input( int alg_arg,
                   int step_arg1, int key_type_arg1, data_t *input1,
                   int expected_status_arg1,
                   int step_arg2, int key_type_arg2, data_t *input2,
                   int expected_status_arg2,
                   int step_arg3, int key_type_arg3, data_t *input3,
                   int expected_status_arg3,
                   int output_key_type_arg, int expected_output_status_arg )
{
    psa_algorithm_t alg = alg_arg;
    psa_key_derivation_step_t steps[] = {step_arg1, step_arg2, step_arg3};
    psa_key_type_t key_types[] = {key_type_arg1, key_type_arg2, key_type_arg3};
    psa_status_t expected_statuses[] = {expected_status_arg1,
                                        expected_status_arg2,
                                        expected_status_arg3};
    data_t *inputs[] = {input1, input2, input3};
    mbedtls_svc_key_id_t keys[] = { MBEDTLS_SVC_KEY_ID_INIT,
                                    MBEDTLS_SVC_KEY_ID_INIT,
                                    MBEDTLS_SVC_KEY_ID_INIT };
    psa_key_derivation_operation_t operation = PSA_KEY_DERIVATION_OPERATION_INIT;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
    size_t i;
    psa_key_type_t output_key_type = output_key_type_arg;
    mbedtls_svc_key_id_t output_key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_status_t expected_output_status = expected_output_status_arg;
    psa_status_t actual_output_status;

    PSA_ASSERT( psa_crypto_init( ) );

    psa_set_key_usage_flags( &attributes, PSA_KEY_USAGE_DERIVE );
    psa_set_key_algorithm( &attributes, alg );

    PSA_ASSERT( psa_key_derivation_setup( &operation, alg ) );

    for( i = 0; i < ARRAY_LENGTH( steps ); i++ )
    {
        if( key_types[i] != PSA_KEY_TYPE_NONE )
        {
            psa_set_key_type( &attributes, key_types[i] );
            PSA_ASSERT( psa_import_key( &attributes,
                                        inputs[i]->x, inputs[i]->len,
                                        &keys[i] ) );
            if( PSA_KEY_TYPE_IS_KEY_PAIR( key_types[i] ) &&
                steps[i] == PSA_KEY_DERIVATION_INPUT_SECRET )
            {
                // When taking a private key as secret input, use key agreement
                // to add the shared secret to the derivation
                TEST_EQUAL( mbedtls_test_psa_key_agreement_with_self(
                                &operation, keys[i] ),
                            expected_statuses[i] );
            }
            else
            {
                TEST_EQUAL( psa_key_derivation_input_key( &operation, steps[i],
                                                          keys[i] ),
                            expected_statuses[i] );
            }
        }
        else
        {
            TEST_EQUAL( psa_key_derivation_input_bytes(
                            &operation, steps[i],
                            inputs[i]->x, inputs[i]->len ),
                        expected_statuses[i] );
        }
    }

    if( output_key_type != PSA_KEY_TYPE_NONE )
    {
        psa_reset_key_attributes( &attributes );
        psa_set_key_type( &attributes, PSA_KEY_TYPE_RAW_DATA );
        psa_set_key_bits( &attributes, 8 );
        actual_output_status =
            psa_key_derivation_output_key( &attributes, &operation,
                                           &output_key );
    }
    else
    {
        uint8_t buffer[1];
        actual_output_status =
            psa_key_derivation_output_bytes( &operation,
                                             buffer, sizeof( buffer ) );
    }
    TEST_EQUAL( actual_output_status, expected_output_status );

exit:
    psa_key_derivation_abort( &operation );
    for( i = 0; i < ARRAY_LENGTH( keys ); i++ )
        psa_destroy_key( keys[i] );
    psa_destroy_key( output_key );
    PSA_DONE( );
}
/* END_CASE */

/* BEGIN_CASE */
void test_derive_invalid_key_derivation_state( int alg_arg )
{
    psa_algorithm_t alg = alg_arg;
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    size_t key_type = PSA_KEY_TYPE_DERIVE;
    psa_key_derivation_operation_t operation = PSA_KEY_DERIVATION_OPERATION_INIT;
    unsigned char input1[] = "Input 1";
    size_t input1_length = sizeof( input1 );
    unsigned char input2[] = "Input 2";
    size_t input2_length = sizeof( input2 );
    uint8_t buffer[42];
    size_t capacity = sizeof( buffer );
    const uint8_t key_data[22] = { 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b,
                                   0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b,
                                   0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b};
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;

    PSA_ASSERT( psa_crypto_init( ) );

    psa_set_key_usage_flags( &attributes, PSA_KEY_USAGE_DERIVE );
    psa_set_key_algorithm( &attributes, alg );
    psa_set_key_type( &attributes, key_type );

    PSA_ASSERT( psa_import_key( &attributes,
                                key_data, sizeof( key_data ),
                                &key ) );

    /* valid key derivation */
    if( !mbedtls_test_psa_setup_key_derivation_wrap( &operation, key, alg,
                                                     input1, input1_length,
                                                     input2, input2_length,
                                                     capacity ) )
        goto exit;

    /* state of operation shouldn't allow additional generation */
    TEST_EQUAL(  psa_key_derivation_setup( &operation, alg ),
                 PSA_ERROR_BAD_STATE );

    PSA_ASSERT( psa_key_derivation_output_bytes( &operation, buffer, capacity ) );

    TEST_EQUAL( psa_key_derivation_output_bytes( &operation, buffer, capacity ),
                PSA_ERROR_INSUFFICIENT_DATA );

exit:
    psa_key_derivation_abort( &operation );
    psa_destroy_key( key );
    PSA_DONE( );
}
/* END_CASE */

/* BEGIN_CASE */
void test_derive_invalid_key_derivation_tests( )
{
    uint8_t output_buffer[16];
    size_t buffer_size = 16;
    size_t capacity = 0;
    psa_key_derivation_operation_t operation = PSA_KEY_DERIVATION_OPERATION_INIT;

    TEST_ASSERT( psa_key_derivation_output_bytes( &operation,
                                                  output_buffer, buffer_size )
                 == PSA_ERROR_BAD_STATE );

    TEST_ASSERT( psa_key_derivation_get_capacity( &operation, &capacity )
                 == PSA_ERROR_BAD_STATE );

    PSA_ASSERT( psa_key_derivation_abort( &operation ) );

    TEST_ASSERT( psa_key_derivation_output_bytes( &operation,
                                                  output_buffer, buffer_size )
                 == PSA_ERROR_BAD_STATE );

    TEST_ASSERT( psa_key_derivation_get_capacity( &operation, &capacity )
                 == PSA_ERROR_BAD_STATE );

exit:
    psa_key_derivation_abort( &operation );
}
/* END_CASE */

/* BEGIN_CASE */
void derive_output( int alg_arg,
                    int step1_arg, data_t *input1,
                    int step2_arg, data_t *input2,
                    int step3_arg, data_t *input3,
                    int requested_capacity_arg,
                    data_t *expected_output1,
                    data_t *expected_output2 )
{
    psa_algorithm_t alg = alg_arg;
    psa_key_derivation_step_t steps[] = {step1_arg, step2_arg, step3_arg};
    data_t *inputs[] = {input1, input2, input3};
    mbedtls_svc_key_id_t keys[] = { MBEDTLS_SVC_KEY_ID_INIT,
                                    MBEDTLS_SVC_KEY_ID_INIT,
                                    MBEDTLS_SVC_KEY_ID_INIT };
    size_t requested_capacity = requested_capacity_arg;
    psa_key_derivation_operation_t operation = PSA_KEY_DERIVATION_OPERATION_INIT;
    uint8_t *expected_outputs[2] =
        {expected_output1->x, expected_output2->x};
    size_t output_sizes[2] =
        {expected_output1->len, expected_output2->len};
    size_t output_buffer_size = 0;
    uint8_t *output_buffer = NULL;
    size_t expected_capacity;
    size_t current_capacity;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
    psa_status_t status;
    size_t i;

    for( i = 0; i < ARRAY_LENGTH( expected_outputs ); i++ )
    {
        if( output_sizes[i] > output_buffer_size )
            output_buffer_size = output_sizes[i];
        if( output_sizes[i] == 0 )
            expected_outputs[i] = NULL;
    }
    ASSERT_ALLOC( output_buffer, output_buffer_size );
    PSA_ASSERT( psa_crypto_init( ) );

    psa_set_key_usage_flags( &attributes, PSA_KEY_USAGE_DERIVE );
    psa_set_key_algorithm( &attributes, alg );
    psa_set_key_type( &attributes, PSA_KEY_TYPE_DERIVE );

    /* Extraction phase. */
    PSA_ASSERT( psa_key_derivation_setup( &operation, alg ) );
    PSA_ASSERT( psa_key_derivation_set_capacity( &operation,
                                                 requested_capacity ) );
    for( i = 0; i < ARRAY_LENGTH( steps ); i++ )
    {
        switch( steps[i] )
        {
            case 0:
                break;
            case PSA_KEY_DERIVATION_INPUT_SECRET:
                PSA_ASSERT( psa_import_key( &attributes,
                                            inputs[i]->x, inputs[i]->len,
                                            &keys[i] ) );
                PSA_ASSERT( psa_key_derivation_input_key(
                                &operation, steps[i], keys[i] ) );
                break;
            default:
                PSA_ASSERT( psa_key_derivation_input_bytes(
                                &operation, steps[i],
                                inputs[i]->x, inputs[i]->len ) );
                break;
        }
    }

    PSA_ASSERT( psa_key_derivation_get_capacity( &operation,
                                                 &current_capacity ) );
    TEST_EQUAL( current_capacity, requested_capacity );
    expected_capacity = requested_capacity;

    /* Expansion phase. */
    for( i = 0; i < ARRAY_LENGTH( expected_outputs ); i++ )
    {
        /* Read some bytes. */
        status = psa_key_derivation_output_bytes( &operation,
                                                  output_buffer, output_sizes[i] );
        if( expected_capacity == 0 && output_sizes[i] == 0 )
        {
            /* Reading 0 bytes when 0 bytes are available can go either way. */
            TEST_ASSERT( status == PSA_SUCCESS ||
                         status == PSA_ERROR_INSUFFICIENT_DATA );
            continue;
        }
        else if( expected_capacity == 0 ||
                 output_sizes[i] > expected_capacity )
        {
            /* Capacity exceeded. */
            TEST_EQUAL( status, PSA_ERROR_INSUFFICIENT_DATA );
            expected_capacity = 0;
            continue;
        }
        /* Success. Check the read data. */
        PSA_ASSERT( status );
        if( output_sizes[i] != 0 )
            ASSERT_COMPARE( output_buffer, output_sizes[i],
                            expected_outputs[i], output_sizes[i] );
        /* Check the operation status. */
        expected_capacity -= output_sizes[i];
        PSA_ASSERT( psa_key_derivation_get_capacity( &operation,
                                                     &current_capacity ) );
        TEST_EQUAL( expected_capacity, current_capacity );
    }
    PSA_ASSERT( psa_key_derivation_abort( &operation ) );

exit:
    mbedtls_free( output_buffer );
    psa_key_derivation_abort( &operation );
    for( i = 0; i < ARRAY_LENGTH( keys ); i++ )
        psa_destroy_key( keys[i] );
    PSA_DONE( );
}
/* END_CASE */

/* BEGIN_CASE */
void derive_full( int alg_arg,
                  data_t *key_data,
                  data_t *input1,
                  data_t *input2,
                  int requested_capacity_arg )
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_algorithm_t alg = alg_arg;
    size_t requested_capacity = requested_capacity_arg;
    psa_key_derivation_operation_t operation = PSA_KEY_DERIVATION_OPERATION_INIT;
    unsigned char output_buffer[16];
    size_t expected_capacity = requested_capacity;
    size_t current_capacity;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;

    PSA_ASSERT( psa_crypto_init( ) );

    psa_set_key_usage_flags( &attributes, PSA_KEY_USAGE_DERIVE );
    psa_set_key_algorithm( &attributes, alg );
    psa_set_key_type( &attributes, PSA_KEY_TYPE_DERIVE );

    PSA_ASSERT( psa_import_key( &attributes, key_data->x, key_data->len,
                                &key ) );

    if( !mbedtls_test_psa_setup_key_derivation_wrap( &operation, key, alg,
                                                     input1->x, input1->len,
                                                     input2->x, input2->len,
                                                     requested_capacity ) )
        goto exit;

    PSA_ASSERT( psa_key_derivation_get_capacity( &operation,
                                                 &current_capacity ) );
    TEST_EQUAL( current_capacity, expected_capacity );

    /* Expansion phase. */
    while( current_capacity > 0 )
    {
        size_t read_size = sizeof( output_buffer );
        if( read_size > current_capacity )
            read_size = current_capacity;
        PSA_ASSERT( psa_key_derivation_output_bytes( &operation,
                                                     output_buffer,
                                                     read_size ) );
        expected_capacity -= read_size;
        PSA_ASSERT( psa_key_derivation_get_capacity( &operation,
                                                     &current_capacity ) );
        TEST_EQUAL( current_capacity, expected_capacity );
    }

    /* Check that the operation refuses to go over capacity. */
    TEST_EQUAL( psa_key_derivation_output_bytes( &operation, output_buffer, 1 ),
                PSA_ERROR_INSUFFICIENT_DATA );

    PSA_ASSERT( psa_key_derivation_abort( &operation ) );

exit:
    psa_key_derivation_abort( &operation );
    psa_destroy_key( key );
    PSA_DONE( );
}
/* END_CASE */

/* BEGIN_CASE */
void derive_key_exercise( int alg_arg,
                          data_t *key_data,
                          data_t *input1,
                          data_t *input2,
                          int derived_type_arg,
                          int derived_bits_arg,
                          int derived_usage_arg,
                          int derived_alg_arg )
{
    mbedtls_svc_key_id_t base_key = MBEDTLS_SVC_KEY_ID_INIT;
    mbedtls_svc_key_id_t derived_key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_algorithm_t alg = alg_arg;
    psa_key_type_t derived_type = derived_type_arg;
    size_t derived_bits = derived_bits_arg;
    psa_key_usage_t derived_usage = derived_usage_arg;
    psa_algorithm_t derived_alg = derived_alg_arg;
    size_t capacity = PSA_BITS_TO_BYTES( derived_bits );
    psa_key_derivation_operation_t operation = PSA_KEY_DERIVATION_OPERATION_INIT;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
    psa_key_attributes_t got_attributes = PSA_KEY_ATTRIBUTES_INIT;

    PSA_ASSERT( psa_crypto_init( ) );

    psa_set_key_usage_flags( &attributes, PSA_KEY_USAGE_DERIVE );
    psa_set_key_algorithm( &attributes, alg );
    psa_set_key_type( &attributes, PSA_KEY_TYPE_DERIVE );
    PSA_ASSERT( psa_import_key( &attributes, key_data->x, key_data->len,
                                &base_key ) );

    /* Derive a key. */
    if ( mbedtls_test_psa_setup_key_derivation_wrap( &operation, base_key, alg,
                                                     input1->x, input1->len,
                                                     input2->x, input2->len,
                                                     capacity ) )
        goto exit;

    psa_set_key_usage_flags( &attributes, derived_usage );
    psa_set_key_algorithm( &attributes, derived_alg );
    psa_set_key_type( &attributes, derived_type );
    psa_set_key_bits( &attributes, derived_bits );
    PSA_ASSERT( psa_key_derivation_output_key( &attributes, &operation,
                                               &derived_key ) );

    /* Test the key information */
    PSA_ASSERT( psa_get_key_attributes( derived_key, &got_attributes ) );
    TEST_EQUAL( psa_get_key_type( &got_attributes ), derived_type );
    TEST_EQUAL( psa_get_key_bits( &got_attributes ), derived_bits );

    /* Exercise the derived key. */
    if( ! mbedtls_test_psa_exercise_key( derived_key, derived_usage, derived_alg ) )
        goto exit;

exit:
    /*
     * Key attributes may have been returned by psa_get_key_attributes()
     * thus reset them as required.
     */
    psa_reset_key_attributes( &got_attributes );

    psa_key_derivation_abort( &operation );
    psa_destroy_key( base_key );
    psa_destroy_key( derived_key );
    PSA_DONE( );
}
/* END_CASE */

/* BEGIN_CASE */
void derive_key_export( int alg_arg,
                        data_t *key_data,
                        data_t *input1,
                        data_t *input2,
                        int bytes1_arg,
                        int bytes2_arg )
{
    mbedtls_svc_key_id_t base_key = MBEDTLS_SVC_KEY_ID_INIT;
    mbedtls_svc_key_id_t derived_key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_algorithm_t alg = alg_arg;
    size_t bytes1 = bytes1_arg;
    size_t bytes2 = bytes2_arg;
    size_t capacity = bytes1 + bytes2;
    psa_key_derivation_operation_t operation = PSA_KEY_DERIVATION_OPERATION_INIT;
    uint8_t *output_buffer = NULL;
    uint8_t *export_buffer = NULL;
    psa_key_attributes_t base_attributes = PSA_KEY_ATTRIBUTES_INIT;
    psa_key_attributes_t derived_attributes = PSA_KEY_ATTRIBUTES_INIT;
    size_t length;

    ASSERT_ALLOC( output_buffer, capacity );
    ASSERT_ALLOC( export_buffer, capacity );
    PSA_ASSERT( psa_crypto_init( ) );

    psa_set_key_usage_flags( &base_attributes, PSA_KEY_USAGE_DERIVE );
    psa_set_key_algorithm( &base_attributes, alg );
    psa_set_key_type( &base_attributes, PSA_KEY_TYPE_DERIVE );
    PSA_ASSERT( psa_import_key( &base_attributes, key_data->x, key_data->len,
                                &base_key ) );

    /* Derive some material and output it. */
    if( !mbedtls_test_psa_setup_key_derivation_wrap( &operation, base_key, alg,
                                                     input1->x, input1->len,
                                                     input2->x, input2->len,
                                                     capacity ) )
        goto exit;

    PSA_ASSERT( psa_key_derivation_output_bytes( &operation,
                                                 output_buffer,
                                                 capacity ) );
    PSA_ASSERT( psa_key_derivation_abort( &operation ) );

    /* Derive the same output again, but this time store it in key objects. */
    if( !mbedtls_test_psa_setup_key_derivation_wrap( &operation, base_key, alg,
                                                     input1->x, input1->len,
                                                     input2->x, input2->len,
                                                     capacity ) )
        goto exit;

    psa_set_key_usage_flags( &derived_attributes, PSA_KEY_USAGE_EXPORT );
    psa_set_key_algorithm( &derived_attributes, 0 );
    psa_set_key_type( &derived_attributes, PSA_KEY_TYPE_RAW_DATA );
    psa_set_key_bits( &derived_attributes, PSA_BYTES_TO_BITS( bytes1 ) );
    PSA_ASSERT( psa_key_derivation_output_key( &derived_attributes, &operation,
                                               &derived_key ) );
    PSA_ASSERT( psa_export_key( derived_key,
                                export_buffer, bytes1,
                                &length ) );
    TEST_EQUAL( length, bytes1 );
    PSA_ASSERT( psa_destroy_key( derived_key ) );
    psa_set_key_bits( &derived_attributes, PSA_BYTES_TO_BITS( bytes2 ) );
    PSA_ASSERT( psa_key_derivation_output_key( &derived_attributes, &operation,
                                               &derived_key ) );
    PSA_ASSERT( psa_export_key( derived_key,
                                export_buffer + bytes1, bytes2,
                                &length ) );
    TEST_EQUAL( length, bytes2 );

    /* Compare the outputs from the two runs. */
    ASSERT_COMPARE( output_buffer, bytes1 + bytes2,
                    export_buffer, capacity );

exit:
    mbedtls_free( output_buffer );
    mbedtls_free( export_buffer );
    psa_key_derivation_abort( &operation );
    psa_destroy_key( base_key );
    psa_destroy_key( derived_key );
    PSA_DONE( );
}
/* END_CASE */

/* BEGIN_CASE */
void derive_key( int alg_arg,
                 data_t *key_data, data_t *input1, data_t *input2,
                 int type_arg, int bits_arg,
                 int expected_status_arg,
                 int is_large_output )
{
    mbedtls_svc_key_id_t base_key = MBEDTLS_SVC_KEY_ID_INIT;
    mbedtls_svc_key_id_t derived_key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_algorithm_t alg = alg_arg;
    psa_key_type_t type = type_arg;
    size_t bits = bits_arg;
    psa_status_t expected_status = expected_status_arg;
    psa_key_derivation_operation_t operation = PSA_KEY_DERIVATION_OPERATION_INIT;
    psa_key_attributes_t base_attributes = PSA_KEY_ATTRIBUTES_INIT;
    psa_key_attributes_t derived_attributes = PSA_KEY_ATTRIBUTES_INIT;

    PSA_ASSERT( psa_crypto_init( ) );

    psa_set_key_usage_flags( &base_attributes, PSA_KEY_USAGE_DERIVE );
    psa_set_key_algorithm( &base_attributes, alg );
    psa_set_key_type( &base_attributes, PSA_KEY_TYPE_DERIVE );
    PSA_ASSERT( psa_import_key( &base_attributes, key_data->x, key_data->len,
                                &base_key ) );

    if( !mbedtls_test_psa_setup_key_derivation_wrap( &operation, base_key, alg,
                                                     input1->x, input1->len,
                                                     input2->x, input2->len,
                                                     SIZE_MAX ) )
        goto exit;

    psa_set_key_usage_flags( &derived_attributes, PSA_KEY_USAGE_EXPORT );
    psa_set_key_algorithm( &derived_attributes, 0 );
    psa_set_key_type( &derived_attributes, type );
    psa_set_key_bits( &derived_attributes, bits );

    psa_status_t status =
      psa_key_derivation_output_key( &derived_attributes,
                                     &operation,
                                     &derived_key );
    if( is_large_output > 0 )
      TEST_ASSUME( status != PSA_ERROR_INSUFFICIENT_MEMORY );
    TEST_EQUAL( status, expected_status );

exit:
    psa_key_derivation_abort( &operation );
    psa_destroy_key( base_key );
    psa_destroy_key( derived_key );
    PSA_DONE( );
}
/* END_CASE */

/* BEGIN_CASE */
void key_agreement_setup( int alg_arg,
                          int our_key_type_arg, int our_key_alg_arg,
                          data_t *our_key_data, data_t *peer_key_data,
                          int expected_status_arg )
{
    mbedtls_svc_key_id_t our_key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_algorithm_t alg = alg_arg;
    psa_algorithm_t our_key_alg = our_key_alg_arg;
    psa_key_type_t our_key_type = our_key_type_arg;
    psa_key_derivation_operation_t operation = PSA_KEY_DERIVATION_OPERATION_INIT;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
    psa_status_t expected_status = expected_status_arg;
    psa_status_t status;

    PSA_ASSERT( psa_crypto_init( ) );

    psa_set_key_usage_flags( &attributes, PSA_KEY_USAGE_DERIVE );
    psa_set_key_algorithm( &attributes, our_key_alg );
    psa_set_key_type( &attributes, our_key_type );
    PSA_ASSERT( psa_import_key( &attributes,
                                our_key_data->x, our_key_data->len,
                                &our_key ) );

    /* The tests currently include inputs that should fail at either step.
     * Test cases that fail at the setup step should be changed to call
     * key_derivation_setup instead, and this function should be renamed
     * to key_agreement_fail. */
    status = psa_key_derivation_setup( &operation, alg );
    if( status == PSA_SUCCESS )
    {
        TEST_EQUAL( psa_key_derivation_key_agreement(
                        &operation, PSA_KEY_DERIVATION_INPUT_SECRET,
                        our_key,
                        peer_key_data->x, peer_key_data->len ),
                    expected_status );
    }
    else
    {
        TEST_ASSERT( status == expected_status );
    }

exit:
    psa_key_derivation_abort( &operation );
    psa_destroy_key( our_key );
    PSA_DONE( );
}
/* END_CASE */

/* BEGIN_CASE */
void raw_key_agreement( int alg_arg,
                        int our_key_type_arg, data_t *our_key_data,
                        data_t *peer_key_data,
                        data_t *expected_output )
{
    mbedtls_svc_key_id_t our_key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_algorithm_t alg = alg_arg;
    psa_key_type_t our_key_type = our_key_type_arg;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
    unsigned char *output = NULL;
    size_t output_length = ~0;

    ASSERT_ALLOC( output, expected_output->len );
    PSA_ASSERT( psa_crypto_init( ) );

    psa_set_key_usage_flags( &attributes, PSA_KEY_USAGE_DERIVE );
    psa_set_key_algorithm( &attributes, alg );
    psa_set_key_type( &attributes, our_key_type );
    PSA_ASSERT( psa_import_key( &attributes,
                                our_key_data->x, our_key_data->len,
                                &our_key ) );

    PSA_ASSERT( psa_raw_key_agreement( alg, our_key,
                                       peer_key_data->x, peer_key_data->len,
                                       output, expected_output->len,
                                       &output_length ) );
    ASSERT_COMPARE( output, output_length,
                    expected_output->x, expected_output->len );

exit:
    mbedtls_free( output );
    psa_destroy_key( our_key );
    PSA_DONE( );
}
/* END_CASE */

/* BEGIN_CASE */
void key_agreement_capacity( int alg_arg,
                             int our_key_type_arg, data_t *our_key_data,
                             data_t *peer_key_data,
                             int expected_capacity_arg )
{
    mbedtls_svc_key_id_t our_key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_algorithm_t alg = alg_arg;
    psa_key_type_t our_key_type = our_key_type_arg;
    psa_key_derivation_operation_t operation = PSA_KEY_DERIVATION_OPERATION_INIT;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
    size_t actual_capacity;
    unsigned char output[16];

    PSA_ASSERT( psa_crypto_init( ) );

    psa_set_key_usage_flags( &attributes, PSA_KEY_USAGE_DERIVE );
    psa_set_key_algorithm( &attributes, alg );
    psa_set_key_type( &attributes, our_key_type );
    PSA_ASSERT( psa_import_key( &attributes,
                                our_key_data->x, our_key_data->len,
                                &our_key ) );

    PSA_ASSERT( psa_key_derivation_setup( &operation, alg ) );
    PSA_ASSERT( psa_key_derivation_key_agreement(
                    &operation,
                    PSA_KEY_DERIVATION_INPUT_SECRET, our_key,
                    peer_key_data->x, peer_key_data->len ) );
    if( PSA_ALG_IS_HKDF( PSA_ALG_KEY_AGREEMENT_GET_KDF( alg ) ) )
    {
        /* The test data is for info="" */
        PSA_ASSERT( psa_key_derivation_input_bytes( &operation,
                                                    PSA_KEY_DERIVATION_INPUT_INFO,
                                                    NULL, 0 ) );
    }

    /* Test the advertized capacity. */
    PSA_ASSERT( psa_key_derivation_get_capacity(
                    &operation, &actual_capacity ) );
    TEST_EQUAL( actual_capacity, (size_t) expected_capacity_arg );

    /* Test the actual capacity by reading the output. */
    while( actual_capacity > sizeof( output ) )
    {
        PSA_ASSERT( psa_key_derivation_output_bytes( &operation,
                                                     output, sizeof( output ) ) );
        actual_capacity -= sizeof( output );
    }
    PSA_ASSERT( psa_key_derivation_output_bytes( &operation,
                                                 output, actual_capacity ) );
    TEST_EQUAL( psa_key_derivation_output_bytes( &operation, output, 1 ),
                PSA_ERROR_INSUFFICIENT_DATA );

exit:
    psa_key_derivation_abort( &operation );
    psa_destroy_key( our_key );
    PSA_DONE( );
}
/* END_CASE */

/* BEGIN_CASE */
void key_agreement_output( int alg_arg,
                           int our_key_type_arg, data_t *our_key_data,
                           data_t *peer_key_data,
                           data_t *expected_output1, data_t *expected_output2 )
{
    mbedtls_svc_key_id_t our_key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_algorithm_t alg = alg_arg;
    psa_key_type_t our_key_type = our_key_type_arg;
    psa_key_derivation_operation_t operation = PSA_KEY_DERIVATION_OPERATION_INIT;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
    uint8_t *actual_output = NULL;

    ASSERT_ALLOC( actual_output, MAX( expected_output1->len,
                                      expected_output2->len ) );

    PSA_ASSERT( psa_crypto_init( ) );

    psa_set_key_usage_flags( &attributes, PSA_KEY_USAGE_DERIVE );
    psa_set_key_algorithm( &attributes, alg );
    psa_set_key_type( &attributes, our_key_type );
    PSA_ASSERT( psa_import_key( &attributes,
                                our_key_data->x, our_key_data->len,
                                &our_key ) );

    PSA_ASSERT( psa_key_derivation_setup( &operation, alg ) );
    PSA_ASSERT( psa_key_derivation_key_agreement(
                    &operation,
                    PSA_KEY_DERIVATION_INPUT_SECRET, our_key,
                    peer_key_data->x, peer_key_data->len ) );
    if( PSA_ALG_IS_HKDF( PSA_ALG_KEY_AGREEMENT_GET_KDF( alg ) ) )
    {
        /* The test data is for info="" */
        PSA_ASSERT( psa_key_derivation_input_bytes( &operation,
                                                    PSA_KEY_DERIVATION_INPUT_INFO,
                                                    NULL, 0 ) );
    }

    PSA_ASSERT( psa_key_derivation_output_bytes( &operation,
                                                 actual_output,
                                                 expected_output1->len ) );
    ASSERT_COMPARE( actual_output, expected_output1->len,
                    expected_output1->x, expected_output1->len );
    if( expected_output2->len != 0 )
    {
        PSA_ASSERT( psa_key_derivation_output_bytes( &operation,
                                                     actual_output,
                                                     expected_output2->len ) );
        ASSERT_COMPARE( actual_output, expected_output2->len,
                        expected_output2->x, expected_output2->len );
    }

exit:
    psa_key_derivation_abort( &operation );
    psa_destroy_key( our_key );
    PSA_DONE( );
    mbedtls_free( actual_output );
}
/* END_CASE */

/* BEGIN_CASE */
void generate_random( int bytes_arg )
{
    size_t bytes = bytes_arg;
    unsigned char *output = NULL;
    unsigned char *changed = NULL;
    size_t i;
    unsigned run;

    TEST_ASSERT( bytes_arg >= 0 );

    ASSERT_ALLOC( output, bytes );
    ASSERT_ALLOC( changed, bytes );

    PSA_ASSERT( psa_crypto_init( ) );

    /* Run several times, to ensure that every output byte will be
     * nonzero at least once with overwhelming probability
     * (2^(-8*number_of_runs)). */
    for( run = 0; run < 10; run++ )
    {
        if( bytes != 0 )
            memset( output, 0, bytes );
        PSA_ASSERT( psa_generate_random( output, bytes ) );

        for( i = 0; i < bytes; i++ )
        {
            if( output[i] != 0 )
                ++changed[i];
        }
    }

    /* Check that every byte was changed to nonzero at least once. This
     * validates that psa_generate_random is overwriting every byte of
     * the output buffer. */
    for( i = 0; i < bytes; i++ )
    {
        TEST_ASSERT( changed[i] != 0 );
    }

exit:
    PSA_DONE( );
    mbedtls_free( output );
    mbedtls_free( changed );
}
/* END_CASE */

/* BEGIN_CASE */
void generate_key( int type_arg,
                   int bits_arg,
                   int usage_arg,
                   int alg_arg,
                   int expected_status_arg,
                   int is_large_key )
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_type_t type = type_arg;
    psa_key_usage_t usage = usage_arg;
    size_t bits = bits_arg;
    psa_algorithm_t alg = alg_arg;
    psa_status_t expected_status = expected_status_arg;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
    psa_key_attributes_t got_attributes = PSA_KEY_ATTRIBUTES_INIT;

    PSA_ASSERT( psa_crypto_init( ) );

    psa_set_key_usage_flags( &attributes, usage );
    psa_set_key_algorithm( &attributes, alg );
    psa_set_key_type( &attributes, type );
    psa_set_key_bits( &attributes, bits );

    /* Generate a key */
    psa_status_t status = psa_generate_key( &attributes, &key );

    if( is_large_key > 0 )
      TEST_ASSUME( status != PSA_ERROR_INSUFFICIENT_MEMORY );
    TEST_EQUAL( status , expected_status );
    if( expected_status != PSA_SUCCESS )
        goto exit;

    /* Test the key information */
    PSA_ASSERT( psa_get_key_attributes( key, &got_attributes ) );
    TEST_EQUAL( psa_get_key_type( &got_attributes ), type );
    TEST_EQUAL( psa_get_key_bits( &got_attributes ), bits );

    /* Do something with the key according to its type and permitted usage. */
    if( ! mbedtls_test_psa_exercise_key( key, usage, alg ) )
        goto exit;

exit:
    /*
     * Key attributes may have been returned by psa_get_key_attributes()
     * thus reset them as required.
     */
    psa_reset_key_attributes( &got_attributes );

    psa_destroy_key( key );
    PSA_DONE( );
}
/* END_CASE */

/* BEGIN_CASE depends_on:MBEDTLS_RSA_C:MBEDTLS_GENPRIME:MBEDTLS_PKCS1_V15 */
void generate_key_rsa( int bits_arg,
                       data_t *e_arg,
                       int expected_status_arg )
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_type_t type = PSA_KEY_TYPE_RSA_KEY_PAIR;
    size_t bits = bits_arg;
    psa_key_usage_t usage = PSA_KEY_USAGE_ENCRYPT | PSA_KEY_USAGE_DECRYPT;
    psa_algorithm_t alg = PSA_ALG_RSA_PKCS1V15_SIGN_RAW;
    psa_status_t expected_status = expected_status_arg;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
    uint8_t *exported = NULL;
    size_t exported_size =
        PSA_EXPORT_KEY_OUTPUT_SIZE( PSA_KEY_TYPE_RSA_PUBLIC_KEY, bits );
    size_t exported_length = SIZE_MAX;
    uint8_t *e_read_buffer = NULL;
    int is_default_public_exponent = 0;
    size_t e_read_size = PSA_KEY_DOMAIN_PARAMETERS_SIZE( type, bits );
    size_t e_read_length = SIZE_MAX;

    if( e_arg->len == 0 ||
        ( e_arg->len == 3 &&
          e_arg->x[0] == 1 && e_arg->x[1] == 0 && e_arg->x[2] == 1 ) )
    {
        is_default_public_exponent = 1;
        e_read_size = 0;
    }
    ASSERT_ALLOC( e_read_buffer, e_read_size );
    ASSERT_ALLOC( exported, exported_size );

    PSA_ASSERT( psa_crypto_init( ) );

    psa_set_key_usage_flags( &attributes, usage );
    psa_set_key_algorithm( &attributes, alg );
    PSA_ASSERT( psa_set_key_domain_parameters( &attributes, type,
                                               e_arg->x, e_arg->len ) );
    psa_set_key_bits( &attributes, bits );

    /* Generate a key */
    TEST_EQUAL( psa_generate_key( &attributes, &key ), expected_status );
    if( expected_status != PSA_SUCCESS )
        goto exit;

    /* Test the key information */
    PSA_ASSERT( psa_get_key_attributes( key, &attributes ) );
    TEST_EQUAL( psa_get_key_type( &attributes ), type );
    TEST_EQUAL( psa_get_key_bits( &attributes ), bits );
    PSA_ASSERT( psa_get_key_domain_parameters( &attributes,
                                               e_read_buffer, e_read_size,
                                               &e_read_length ) );
    if( is_default_public_exponent )
        TEST_EQUAL( e_read_length, 0 );
    else
        ASSERT_COMPARE( e_read_buffer, e_read_length, e_arg->x, e_arg->len );

    /* Do something with the key according to its type and permitted usage. */
    if( ! mbedtls_test_psa_exercise_key( key, usage, alg ) )
        goto exit;

    /* Export the key and check the public exponent. */
    PSA_ASSERT( psa_export_public_key( key,
                                       exported, exported_size,
                                       &exported_length ) );
    {
        uint8_t *p = exported;
        uint8_t *end = exported + exported_length;
        size_t len;
        /*   RSAPublicKey ::= SEQUENCE {
         *      modulus            INTEGER,    -- n
         *      publicExponent     INTEGER  }  -- e
         */
        TEST_EQUAL( 0, mbedtls_asn1_get_tag( &p, end, &len,
                                             MBEDTLS_ASN1_SEQUENCE |
                                             MBEDTLS_ASN1_CONSTRUCTED ) );
        TEST_ASSERT( mbedtls_test_asn1_skip_integer( &p, end, bits, bits, 1 ) );
        TEST_EQUAL( 0, mbedtls_asn1_get_tag( &p, end, &len,
                                             MBEDTLS_ASN1_INTEGER ) );
        if( len >= 1 && p[0] == 0 )
        {
            ++p;
            --len;
        }
        if( e_arg->len == 0 )
        {
            TEST_EQUAL( len, 3 );
            TEST_EQUAL( p[0], 1 );
            TEST_EQUAL( p[1], 0 );
            TEST_EQUAL( p[2], 1 );
        }
        else
            ASSERT_COMPARE( p, len, e_arg->x, e_arg->len );
    }

exit:
    /*
     * Key attributes may have been returned by psa_get_key_attributes() or
     * set by psa_set_key_domain_parameters() thus reset them as required.
     */
    psa_reset_key_attributes( &attributes );

    psa_destroy_key( key );
    PSA_DONE( );
    mbedtls_free( e_read_buffer );
    mbedtls_free( exported );
}
/* END_CASE */

/* BEGIN_CASE depends_on:MBEDTLS_PSA_CRYPTO_STORAGE_C */
void persistent_key_load_key_from_storage( data_t *data,
                                           int type_arg, int bits_arg,
                                           int usage_flags_arg, int alg_arg,
                                           int generation_method )
{
    mbedtls_svc_key_id_t key_id = mbedtls_svc_key_id_make( 1, 1 );
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    mbedtls_svc_key_id_t base_key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_type_t type = type_arg;
    size_t bits = bits_arg;
    psa_key_usage_t usage_flags = usage_flags_arg;
    psa_algorithm_t alg = alg_arg;
    psa_key_derivation_operation_t operation = PSA_KEY_DERIVATION_OPERATION_INIT;
    unsigned char *first_export = NULL;
    unsigned char *second_export = NULL;
    size_t export_size = PSA_EXPORT_KEY_OUTPUT_SIZE( type, bits );
    size_t first_exported_length;
    size_t second_exported_length;

    if( usage_flags & PSA_KEY_USAGE_EXPORT )
    {
        ASSERT_ALLOC( first_export, export_size );
        ASSERT_ALLOC( second_export, export_size );
    }

    PSA_ASSERT( psa_crypto_init() );

    psa_set_key_id( &attributes, key_id );
    psa_set_key_usage_flags( &attributes, usage_flags );
    psa_set_key_algorithm( &attributes, alg );
    psa_set_key_type( &attributes, type );
    psa_set_key_bits( &attributes, bits );

    switch( generation_method )
    {
        case IMPORT_KEY:
            /* Import the key */
            PSA_ASSERT( psa_import_key( &attributes, data->x, data->len,
                                        &key ) );
            break;

        case GENERATE_KEY:
            /* Generate a key */
            PSA_ASSERT( psa_generate_key( &attributes, &key ) );
            break;

        case DERIVE_KEY:
#if defined(PSA_WANT_ALG_HKDF) && defined(PSA_WANT_ALG_SHA_256)
            {
                /* Create base key */
                psa_algorithm_t derive_alg = PSA_ALG_HKDF( PSA_ALG_SHA_256 );
                psa_key_attributes_t base_attributes = PSA_KEY_ATTRIBUTES_INIT;
                psa_set_key_usage_flags( &base_attributes,
                                         PSA_KEY_USAGE_DERIVE );
                psa_set_key_algorithm( &base_attributes, derive_alg );
                psa_set_key_type( &base_attributes, PSA_KEY_TYPE_DERIVE );
                PSA_ASSERT( psa_import_key( &base_attributes,
                                            data->x, data->len,
                                            &base_key ) );
                /* Derive a key. */
                PSA_ASSERT( psa_key_derivation_setup( &operation, derive_alg ) );
                PSA_ASSERT( psa_key_derivation_input_key(
                                &operation,
                                PSA_KEY_DERIVATION_INPUT_SECRET, base_key ) );
                PSA_ASSERT( psa_key_derivation_input_bytes(
                                &operation, PSA_KEY_DERIVATION_INPUT_INFO,
                                NULL, 0 ) );
                PSA_ASSERT( psa_key_derivation_output_key( &attributes,
                                                           &operation,
                                                           &key ) );
                PSA_ASSERT( psa_key_derivation_abort( &operation ) );
                PSA_ASSERT( psa_destroy_key( base_key ) );
                base_key = MBEDTLS_SVC_KEY_ID_INIT;
            }
#else
            TEST_ASSUME( ! "KDF not supported in this configuration" );
#endif
            break;

        default:
            TEST_ASSERT( ! "generation_method not implemented in test" );
            break;
    }
    psa_reset_key_attributes( &attributes );

    /* Export the key if permitted by the key policy. */
    if( usage_flags & PSA_KEY_USAGE_EXPORT )
    {
        PSA_ASSERT( psa_export_key( key,
                                    first_export, export_size,
                                    &first_exported_length ) );
        if( generation_method == IMPORT_KEY )
            ASSERT_COMPARE( data->x, data->len,
                            first_export, first_exported_length );
    }

    /* Shutdown and restart */
    PSA_ASSERT( psa_purge_key( key ) );
    PSA_DONE();
    PSA_ASSERT( psa_crypto_init() );

    /* Check key slot still contains key data */
    PSA_ASSERT( psa_get_key_attributes( key, &attributes ) );
    TEST_ASSERT( mbedtls_svc_key_id_equal(
                     psa_get_key_id( &attributes ), key_id ) );
    TEST_EQUAL( psa_get_key_lifetime( &attributes ),
                PSA_KEY_LIFETIME_PERSISTENT );
    TEST_EQUAL( psa_get_key_type( &attributes ), type );
    TEST_EQUAL( psa_get_key_bits( &attributes ), bits );
    TEST_EQUAL( psa_get_key_usage_flags( &attributes ), usage_flags );
    TEST_EQUAL( psa_get_key_algorithm( &attributes ), alg );

    /* Export the key again if permitted by the key policy. */
    if( usage_flags & PSA_KEY_USAGE_EXPORT )
    {
        PSA_ASSERT( psa_export_key( key,
                                    second_export, export_size,
                                    &second_exported_length ) );
        ASSERT_COMPARE( first_export, first_exported_length,
                        second_export, second_exported_length );
    }

    /* Do something with the key according to its type and permitted usage. */
    if( ! mbedtls_test_psa_exercise_key( key, usage_flags, alg ) )
        goto exit;

exit:
    /*
     * Key attributes may have been returned by psa_get_key_attributes()
     * thus reset them as required.
     */
    psa_reset_key_attributes( &attributes );

    mbedtls_free( first_export );
    mbedtls_free( second_export );
    psa_key_derivation_abort( &operation );
    psa_destroy_key( base_key );
    psa_destroy_key( key );
    PSA_DONE();
}
/* END_CASE */