tests/suites/test_suite_pk.function

/* BEGIN_HEADER */
#include "mbedtls/pk.h"
#include "mbedtls/psa_util.h"
#include "pk_internal.h"

/* For error codes */
#include "mbedtls/asn1.h"
#include "mbedtls/base64.h"
#include "mbedtls/ecp.h"
#include "mbedtls/error.h"
#include "mbedtls/rsa.h"
#include "rsa_internal.h"
#include "pk_internal.h"

#include <limits.h>
#include <stdint.h>

/* Needed only for test case data under #if defined(MBEDTLS_USE_PSA_CRYPTO),
 * but the test code generator requires test case data to be valid C code
 * unconditionally (https://github.com/Mbed-TLS/mbedtls/issues/2023). */
#include "psa/crypto.h"
#include "mbedtls/psa_util.h"

#include <test/psa_exercise_key.h>

/* Needed for the definition of MBEDTLS_PK_WRITE_PUBKEY_MAX_SIZE. */
#include "pkwrite.h"

/* Used for properly sizing the key buffer in pk_genkey_ec() */
#include "psa_util_internal.h"

#define RSA_KEY_SIZE   MBEDTLS_RSA_GEN_KEY_MIN_BITS
#define RSA_KEY_LEN   (MBEDTLS_RSA_GEN_KEY_MIN_BITS/8)

#if defined(MBEDTLS_RSA_C) ||                                           \
    defined(MBEDTLS_PK_RSA_ALT_SUPPORT) ||                              \
    defined(MBEDTLS_ECDSA_C) ||                                         \
    defined(MBEDTLS_USE_PSA_CRYPTO)
#define PK_CAN_SIGN_SOME
#endif

/* MBEDTLS_TEST_PK_PSA_SIGN is enabled when:
 * - The build has PK_[PARSE/WRITE]_C for RSA or ECDSA signature.
 * - The build has built-in ECC and ECDSA signature.
 */
#if (defined(MBEDTLS_PK_PARSE_C) && defined(MBEDTLS_PK_WRITE_C) && \
    ((defined(MBEDTLS_RSA_C) && defined(MBEDTLS_GENPRIME)) || \
    defined(MBEDTLS_PK_CAN_ECDSA_SIGN))) || \
    (defined(MBEDTLS_ECP_C) && defined(MBEDTLS_PK_CAN_ECDSA_SIGN))
#define MBEDTLS_TEST_PK_PSA_SIGN
#endif

#if defined(MBEDTLS_PSA_CRYPTO_C) && defined(PSA_WANT_KEY_TYPE_ECC_PUBLIC_KEY)
/* Pick an elliptic curve that's supported by PSA. Note that the curve is
 * not guaranteed to be supported by the ECP module.
 *
 * This should always find a curve if ECC is enabled in the build, except in
 * one edge case: in a build with MBEDTLS_PSA_CRYPTO_CONFIG disabled and
 * where the only legacy curve is secp224k1, which is not supported in PSA,
 * PSA_WANT_KEY_TYPE_ECC_PUBLIC_KEY ends up enabled but PSA does not
 * support any curve.
 */

/* First try all the curves that can do both ECDSA and ECDH, then try
 * the ECDH-only curves. (There are no curves that can do ECDSA but not ECDH.)
 * This way, if ECDSA is enabled then the curve that's selected here will
 * be ECDSA-capable, and likewise for ECDH. */
#if defined(PSA_WANT_ECC_SECP_R1_192)
#define MBEDTLS_TEST_PSA_ECC_ONE_FAMILY PSA_ECC_FAMILY_SECP_R1
#define MBEDTLS_TEST_PSA_ECC_ONE_CURVE_BITS 192
#define MBEDTLS_TEST_ECP_DP_ONE_CURVE MBEDTLS_ECP_DP_SECP192R1
#elif defined(PSA_WANT_ECC_SECP_R1_224)
#define MBEDTLS_TEST_PSA_ECC_ONE_FAMILY PSA_ECC_FAMILY_SECP_R1
#define MBEDTLS_TEST_PSA_ECC_ONE_CURVE_BITS 224
#define MBEDTLS_TEST_ECP_DP_ONE_CURVE MBEDTLS_ECP_DP_SECP224R1
#elif defined(PSA_WANT_ECC_SECP_R1_256)
#define MBEDTLS_TEST_PSA_ECC_ONE_FAMILY PSA_ECC_FAMILY_SECP_R1
#define MBEDTLS_TEST_PSA_ECC_ONE_CURVE_BITS 256
#define MBEDTLS_TEST_ECP_DP_ONE_CURVE MBEDTLS_ECP_DP_SECP256R1
#elif defined(PSA_WANT_ECC_SECP_R1_384)
#define MBEDTLS_TEST_PSA_ECC_ONE_FAMILY PSA_ECC_FAMILY_SECP_R1
#define MBEDTLS_TEST_PSA_ECC_ONE_CURVE_BITS 384
#define MBEDTLS_TEST_ECP_DP_ONE_CURVE MBEDTLS_ECP_DP_SECP384R1
#elif defined(PSA_WANT_ECC_SECP_R1_521)
#define MBEDTLS_TEST_PSA_ECC_ONE_FAMILY PSA_ECC_FAMILY_SECP_R1
#define MBEDTLS_TEST_PSA_ECC_ONE_CURVE_BITS 521
#define MBEDTLS_TEST_ECP_DP_ONE_CURVE MBEDTLS_ECP_DP_SECP521R1
#elif defined(PSA_WANT_ECC_SECP_K1_192)
#define MBEDTLS_TEST_PSA_ECC_ONE_FAMILY PSA_ECC_FAMILY_SECP_K1
#define MBEDTLS_TEST_PSA_ECC_ONE_CURVE_BITS 192
#define MBEDTLS_TEST_ECP_DP_ONE_CURVE MBEDTLS_ECP_DP_SECP192K1
#elif defined(PSA_WANT_ECC_SECP_K1_224)
#define MBEDTLS_TEST_PSA_ECC_ONE_FAMILY PSA_ECC_FAMILY_SECP_K1
#define MBEDTLS_TEST_PSA_ECC_ONE_CURVE_BITS 224
#define MBEDTLS_TEST_ECP_DP_ONE_CURVE MBEDTLS_ECP_DP_SECP224K1
#elif defined(PSA_WANT_ECC_SECP_K1_256)
#define MBEDTLS_TEST_PSA_ECC_ONE_FAMILY PSA_ECC_FAMILY_SECP_K1
#define MBEDTLS_TEST_PSA_ECC_ONE_CURVE_BITS 256
#define MBEDTLS_TEST_ECP_DP_ONE_CURVE MBEDTLS_ECP_DP_SECP256K1
#elif defined(PSA_WANT_ECC_BRAINPOOL_P_R1_256)
#define MBEDTLS_TEST_PSA_ECC_ONE_FAMILY PSA_ECC_FAMILY_BRAINPOOL_P_R1
#define MBEDTLS_TEST_PSA_ECC_ONE_CURVE_BITS 256
#define MBEDTLS_TEST_ECP_DP_ONE_CURVE MBEDTLS_ECP_DP_BP256R1
#elif defined(PSA_WANT_ECC_BRAINPOOL_P_R1_384)
#define MBEDTLS_TEST_PSA_ECC_ONE_FAMILY PSA_ECC_FAMILY_BRAINPOOL_P_R1
#define MBEDTLS_TEST_PSA_ECC_ONE_CURVE_BITS 384
#define MBEDTLS_TEST_ECP_DP_ONE_CURVE MBEDTLS_ECP_DP_BP384R1
#elif defined(PSA_WANT_ECC_BRAINPOOL_P_R1_512)
#define MBEDTLS_TEST_PSA_ECC_ONE_FAMILY PSA_ECC_FAMILY_BRAINPOOL_P_R1
#define MBEDTLS_TEST_PSA_ECC_ONE_CURVE_BITS 512
#define MBEDTLS_TEST_ECP_DP_ONE_CURVE MBEDTLS_ECP_DP_BP512R1
#elif defined(PSA_WANT_ECC_MONTGOMERY_255)
#define MBEDTLS_TEST_PSA_ECC_ONE_FAMILY PSA_ECC_FAMILY_MONTGOMERY
#define MBEDTLS_TEST_PSA_ECC_ONE_CURVE_BITS 255
#define MBEDTLS_TEST_ECP_DP_ONE_CURVE MBEDTLS_ECP_DP_CURVE25519
#elif defined(PSA_WANT_ECC_MONTGOMERY_448)
#define MBEDTLS_TEST_PSA_ECC_ONE_FAMILY PSA_ECC_FAMILY_MONTGOMERY
#define MBEDTLS_TEST_PSA_ECC_ONE_CURVE_BITS 448
#define MBEDTLS_TEST_ECP_DP_ONE_CURVE MBEDTLS_ECP_DP_CURVE448
#endif /* curve selection */

#if defined(MBEDTLS_TEST_PSA_ECC_ONE_FAMILY)
#define MBEDTLS_TEST_PSA_ECC_AT_LEAST_ONE_CURVE
#endif

/* Pick a second curve, for tests that need two supported curves of the
 * same size. For simplicity, we only handle a subset of configurations,
 * and both curves will support both ECDH and ECDSA. */
#if defined(PSA_WANT_ECC_SECP_R1_192) && defined(PSA_WANT_ECC_SECP_K1_192)
/* Identical redefinition of the ONE macros, to confirm that they have
 * the values we expect here. */
#define MBEDTLS_TEST_PSA_ECC_ONE_FAMILY PSA_ECC_FAMILY_SECP_R1
#define MBEDTLS_TEST_PSA_ECC_ANOTHER_FAMILY PSA_ECC_FAMILY_SECP_K1
#define MBEDTLS_TEST_PSA_ECC_ONE_CURVE_BITS 192
#define MBEDTLS_TEST_PSA_ECC_HAVE_TWO_FAMILIES
#elif defined(PSA_WANT_ECC_SECP_R1_256) && defined(PSA_WANT_ECC_SECP_K1_256)
#define MBEDTLS_TEST_PSA_ECC_ONE_FAMILY PSA_ECC_FAMILY_SECP_R1
#define MBEDTLS_TEST_PSA_ECC_ANOTHER_FAMILY PSA_ECC_FAMILY_SECP_K1
#define MBEDTLS_TEST_PSA_ECC_ONE_CURVE_BITS 256
#define MBEDTLS_TEST_PSA_ECC_HAVE_TWO_FAMILIES
#endif

/* Pick a second bit-size, for tests that need two supported curves of the
 * same family. For simplicity, we only handle a subset of configurations,
 * and both curves will support both ECDH and ECDSA. */
#if defined(PSA_WANT_ECC_SECP_R1_192) && defined(PSA_WANT_ECC_SECP_R1_256)
/* Identical redefinition of the ONE macros, to confirm that they have
 * the values we expect here. */
#define MBEDTLS_TEST_PSA_ECC_ONE_FAMILY PSA_ECC_FAMILY_SECP_R1
#define MBEDTLS_TEST_PSA_ECC_ONE_CURVE_BITS 192
#define MBEDTLS_TEST_PSA_ECC_ANOTHER_CURVE_BITS 256
#define MBEDTLS_TEST_PSA_ECC_HAVE_TWO_BITS
#elif defined(PSA_WANT_ECC_SECP_R1_256) && defined(PSA_WANT_ECC_SECP_R1_384)
#define MBEDTLS_TEST_PSA_ECC_ONE_FAMILY PSA_ECC_FAMILY_SECP_R1
#define MBEDTLS_TEST_PSA_ECC_ONE_CURVE_BITS 256
#define MBEDTLS_TEST_PSA_ECC_ANOTHER_CURVE_BITS 384
#define MBEDTLS_TEST_PSA_ECC_HAVE_TWO_BITS
#endif

#endif /* defined(MBEDTLS_PSA_CRYPTO_C) && defined(PSA_WANT_KEY_TYPE_ECC_PUBLIC_KEY) */

/* Always define the macros so that we can use them in test data. */
#if !defined(MBEDTLS_TEST_PSA_ECC_ONE_FAMILY)
#define MBEDTLS_TEST_PSA_ECC_ONE_FAMILY 0
#define MBEDTLS_TEST_PSA_ECC_ONE_CURVE_BITS 0
#define MBEDTLS_TEST_ECP_DP_ONE_CURVE 0
#endif
#if !defined(MBEDTLS_TEST_PSA_ECC_ANOTHER_FAMILY)
#define MBEDTLS_TEST_PSA_ECC_ANOTHER_FAMILY 0
#endif
#if !defined(MBEDTLS_TEST_PSA_ECC_ANOTHER_CURVE_BITS)
#define MBEDTLS_TEST_PSA_ECC_ANOTHER_CURVE_BITS 0
#endif

/* Get an available MD alg to be used in sign/verify tests. */
#if defined(MBEDTLS_MD_CAN_SHA1)
#define MBEDTLS_MD_ALG_FOR_TEST         MBEDTLS_MD_SHA1
#elif defined(MBEDTLS_MD_CAN_SHA224)
#define MBEDTLS_MD_ALG_FOR_TEST         MBEDTLS_MD_SHA224
#elif defined(MBEDTLS_MD_CAN_SHA256)
#define MBEDTLS_MD_ALG_FOR_TEST         MBEDTLS_MD_SHA256
#elif defined(MBEDTLS_MD_CAN_SHA384)
#define MBEDTLS_MD_ALG_FOR_TEST         MBEDTLS_MD_SHA384
#elif defined(MBEDTLS_MD_CAN_SHA512)
#define MBEDTLS_MD_ALG_FOR_TEST         MBEDTLS_MD_SHA512
#endif

#if defined(MBEDTLS_PK_USE_PSA_EC_DATA)
static int pk_genkey_ec(mbedtls_pk_context *pk, mbedtls_ecp_group_id grp_id)
{
    psa_status_t status;
    psa_key_attributes_t key_attr = PSA_KEY_ATTRIBUTES_INIT;
    size_t curve_bits;
    psa_ecc_family_t curve = mbedtls_ecc_group_to_psa(grp_id, &curve_bits);
    int ret;

    if (curve == 0) {
        return MBEDTLS_ERR_PK_BAD_INPUT_DATA;
    }

    psa_set_key_type(&key_attr, PSA_KEY_TYPE_ECC_KEY_PAIR(curve));
    psa_set_key_bits(&key_attr, curve_bits);
    psa_key_usage_t usage = PSA_KEY_USAGE_EXPORT | PSA_KEY_USAGE_COPY;
    psa_algorithm_t sign_alg = 0;
    psa_algorithm_t derive_alg = 0;
    if (mbedtls_pk_get_type(pk) != MBEDTLS_PK_ECDSA) {
        usage |= PSA_KEY_USAGE_DERIVE;
        derive_alg = PSA_ALG_ECDH;
    }
    if (mbedtls_pk_get_type(pk) != MBEDTLS_PK_ECKEY_DH &&
        curve != PSA_ECC_FAMILY_MONTGOMERY) {
        usage |= PSA_KEY_USAGE_SIGN_HASH | PSA_KEY_USAGE_SIGN_MESSAGE;
#if defined(MBEDTLS_ECDSA_DETERMINISTIC)
        sign_alg = PSA_ALG_DETERMINISTIC_ECDSA(PSA_ALG_ANY_HASH);
#else
        sign_alg = PSA_ALG_ECDSA(PSA_ALG_ANY_HASH);
#endif
    }
    if (derive_alg != 0) {
        psa_set_key_algorithm(&key_attr, derive_alg);
        if (sign_alg != 0) {
            psa_set_key_enrollment_algorithm(&key_attr, sign_alg);
        }
    } else {
        psa_set_key_algorithm(&key_attr, sign_alg);
    }
    psa_set_key_usage_flags(&key_attr, usage);

    status = psa_generate_key(&key_attr, &pk->priv_id);
    if (status != PSA_SUCCESS) {
        return MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE;
    }

    status = psa_export_public_key(pk->priv_id, pk->pub_raw, sizeof(pk->pub_raw),
                                   &pk->pub_raw_len);
    if (status != PSA_SUCCESS) {
        ret = MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE;
        goto exit;
    }

    pk->ec_family = curve;
    pk->ec_bits = curve_bits;

    return 0;

exit:
    status = psa_destroy_key(pk->priv_id);
    return (ret != 0) ? ret : psa_pk_status_to_mbedtls(status);
}
#endif /* MBEDTLS_PK_USE_PSA_EC_DATA */

/** Generate a key of the desired type.
 *
 * \param pk               The PK object to fill. It must have been initialized
 *                         with mbedtls_pk_setup().
 * \param curve_or_keybits - For RSA keys, the key size in bits.
 *                         - For EC keys, the curve (\c MBEDTLS_ECP_DP_xxx).
 *
 * \return                 The status from the underlying type-specific key
 *                         generation function.
 * \return                 -1 if the key type is not recognized.
 */
static int pk_genkey(mbedtls_pk_context *pk, int curve_or_keybits)
{
    (void) pk;
    (void) curve_or_keybits;

#if defined(MBEDTLS_RSA_C) && defined(MBEDTLS_GENPRIME)
    if (mbedtls_pk_get_type(pk) == MBEDTLS_PK_RSA) {
        return mbedtls_rsa_gen_key(mbedtls_pk_rsa(*pk),
                                   mbedtls_test_rnd_std_rand, NULL,
                                   curve_or_keybits, 3);
    }
#endif
#if defined(MBEDTLS_PK_HAVE_ECC_KEYS)
    if (mbedtls_pk_get_type(pk) == MBEDTLS_PK_ECKEY ||
        mbedtls_pk_get_type(pk) == MBEDTLS_PK_ECKEY_DH ||
        mbedtls_pk_get_type(pk) == MBEDTLS_PK_ECDSA) {
        int ret;

#if defined(MBEDTLS_PK_USE_PSA_EC_DATA)
        ret = pk_genkey_ec(pk, curve_or_keybits);
        if (ret != 0) {
            return ret;
        }

        return 0;
#else
        ret = mbedtls_ecp_group_load(&mbedtls_pk_ec_rw(*pk)->grp, curve_or_keybits);
        if (ret != 0) {
            return ret;
        }
        return mbedtls_ecp_gen_keypair(&mbedtls_pk_ec_rw(*pk)->grp,
                                       &mbedtls_pk_ec_rw(*pk)->d,
                                       &mbedtls_pk_ec_rw(*pk)->Q,
                                       mbedtls_test_rnd_std_rand, NULL);
#endif /* MBEDTLS_PK_USE_PSA_EC_DATA */

    }
#endif /* MBEDTLS_PK_HAVE_ECC_KEYS */
    return -1;
}

#if defined(MBEDTLS_PSA_CRYPTO_C)
static psa_key_usage_t pk_get_psa_attributes_implied_usage(
    psa_key_usage_t expected_usage)
{
    /* Usage implied universally */
    if (expected_usage & PSA_KEY_USAGE_SIGN_HASH) {
        expected_usage |= PSA_KEY_USAGE_SIGN_MESSAGE;
    }
    if (expected_usage & PSA_KEY_USAGE_VERIFY_HASH) {
        expected_usage |= PSA_KEY_USAGE_VERIFY_MESSAGE;
    }
    /* Usage implied by mbedtls_pk_get_psa_attributes() */
    if (expected_usage & PSA_KEY_USAGE_SIGN_HASH) {
        expected_usage |= PSA_KEY_USAGE_VERIFY_HASH;
    }
    if (expected_usage & PSA_KEY_USAGE_SIGN_MESSAGE) {
        expected_usage |= PSA_KEY_USAGE_VERIFY_MESSAGE;
    }
    if (expected_usage & PSA_KEY_USAGE_DECRYPT) {
        expected_usage |= PSA_KEY_USAGE_ENCRYPT;
    }
    expected_usage |= PSA_KEY_USAGE_EXPORT | PSA_KEY_USAGE_COPY;
    return expected_usage;
}

#define RSA_WRITE_PUBKEY_MAX_SIZE                                       \
    PSA_KEY_EXPORT_RSA_PUBLIC_KEY_MAX_SIZE(PSA_VENDOR_RSA_MAX_KEY_BITS)
#define ECP_WRITE_PUBKEY_MAX_SIZE                                       \
    PSA_KEY_EXPORT_ECC_PUBLIC_KEY_MAX_SIZE(PSA_VENDOR_ECC_MAX_CURVE_BITS)
static int pk_public_same(const mbedtls_pk_context *pk1,
                          const mbedtls_pk_context *pk2)
{
    int ok = 0;

    mbedtls_pk_type_t type = mbedtls_pk_get_type(pk1);
    TEST_EQUAL(type, mbedtls_pk_get_type(pk2));

    switch (type) {
#if defined(MBEDTLS_RSA_C)
        case MBEDTLS_PK_RSA:
        {
            const mbedtls_rsa_context *rsa1 = mbedtls_pk_rsa(*pk1);
            const mbedtls_rsa_context *rsa2 = mbedtls_pk_rsa(*pk2);
            TEST_EQUAL(mbedtls_rsa_get_padding_mode(rsa1),
                       mbedtls_rsa_get_padding_mode(rsa2));
            TEST_EQUAL(mbedtls_rsa_get_md_alg(rsa1),
                       mbedtls_rsa_get_md_alg(rsa2));
            unsigned char buf1[RSA_WRITE_PUBKEY_MAX_SIZE];
            unsigned char *p1 = buf1 + sizeof(buf1);
            int len1 = mbedtls_rsa_write_pubkey(rsa1, buf1, &p1);
            TEST_LE_U(0, len1);
            unsigned char buf2[RSA_WRITE_PUBKEY_MAX_SIZE];
            unsigned char *p2 = buf2 + sizeof(buf2);
            int len2 = mbedtls_rsa_write_pubkey(rsa2, buf2, &p2);
            TEST_LE_U(0, len2);
            TEST_MEMORY_COMPARE(p1, len1, p2, len2);
            break;
        }
#endif /* MBEDTLS_RSA_C */

#if defined(MBEDTLS_PK_HAVE_ECC_KEYS)
        case MBEDTLS_PK_ECKEY:
        case MBEDTLS_PK_ECKEY_DH:
        case MBEDTLS_PK_ECDSA:
        {
#if defined(MBEDTLS_PK_USE_PSA_EC_DATA)
            TEST_MEMORY_COMPARE(pk1->pub_raw, pk1->pub_raw_len,
                                pk2->pub_raw, pk2->pub_raw_len);
            TEST_EQUAL(pk1->ec_family, pk2->ec_family);
            TEST_EQUAL(pk1->ec_bits, pk2->ec_bits);

#else /* MBEDTLS_PK_USE_PSA_EC_DATA */
            const mbedtls_ecp_keypair *ec1 = mbedtls_pk_ec_ro(*pk1);
            const mbedtls_ecp_keypair *ec2 = mbedtls_pk_ec_ro(*pk2);
            TEST_EQUAL(mbedtls_ecp_keypair_get_group_id(ec1),
                       mbedtls_ecp_keypair_get_group_id(ec2));
            unsigned char buf1[ECP_WRITE_PUBKEY_MAX_SIZE];
            size_t len1 = 99999991;
            TEST_EQUAL(mbedtls_ecp_write_public_key(
                           ec1, MBEDTLS_ECP_PF_UNCOMPRESSED,
                           &len1, buf1, sizeof(buf1)), 0);
            unsigned char buf2[ECP_WRITE_PUBKEY_MAX_SIZE];
            size_t len2 = 99999992;
            TEST_EQUAL(mbedtls_ecp_write_public_key(
                           ec2, MBEDTLS_ECP_PF_UNCOMPRESSED,
                           &len2, buf2, sizeof(buf2)), 0);
            TEST_MEMORY_COMPARE(buf1, len1, buf2, len2);
#endif /* MBEDTLS_PK_USE_PSA_EC_DATA */
        }
        break;
#endif /* MBEDTLS_PK_HAVE_ECC_KEYS */

        default:
            TEST_FAIL("Unsupported pk type in pk_public_same");
    }

    ok = 1;

exit:
    return ok;
}
#endif /* MBEDTLS_PSA_CRYPTO_C */

#if defined(MBEDTLS_RSA_C)
int mbedtls_rsa_decrypt_func(void *ctx, size_t *olen,
                             const unsigned char *input, unsigned char *output,
                             size_t output_max_len)
{
    return mbedtls_rsa_pkcs1_decrypt((mbedtls_rsa_context *) ctx,
                                     mbedtls_test_rnd_std_rand, NULL,
                                     olen, input, output, output_max_len);
}
int mbedtls_rsa_sign_func(void *ctx,
                          int (*f_rng)(void *, unsigned char *, size_t), void *p_rng,
                          mbedtls_md_type_t md_alg, unsigned int hashlen,
                          const unsigned char *hash, unsigned char *sig)
{
    ((void) f_rng);
    ((void) p_rng);
    return mbedtls_rsa_pkcs1_sign((mbedtls_rsa_context *) ctx,
                                  mbedtls_test_rnd_std_rand, NULL,
                                  md_alg, hashlen, hash, sig);
}
size_t mbedtls_rsa_key_len_func(void *ctx)
{
    return ((const mbedtls_rsa_context *) ctx)->len;
}
#endif /* MBEDTLS_RSA_C */

typedef enum {
    /* The values are compatible with thinking of "from pair" as a boolean. */
    FROM_PUBLIC = 0,
    FROM_PAIR = 1
} from_pair_t;

#if defined(MBEDTLS_PSA_CRYPTO_C)
static int pk_setup_for_type(mbedtls_pk_type_t pk_type, int want_pair,
                             mbedtls_pk_context *pk, psa_key_type_t *psa_type)
{
    if (pk_type == MBEDTLS_PK_NONE) {
        return 0;
    }
    TEST_EQUAL(mbedtls_pk_setup(pk, mbedtls_pk_info_from_type(pk_type)), 0);

    switch (pk_type) {
#if defined(MBEDTLS_RSA_C)
        case MBEDTLS_PK_RSA:
        {
            *psa_type = PSA_KEY_TYPE_RSA_KEY_PAIR;
            mbedtls_rsa_context *rsa = mbedtls_pk_rsa(*pk);
            if (want_pair) {
#if defined(MBEDTLS_GENPRIME)
                TEST_EQUAL(mbedtls_rsa_gen_key(
                               rsa,
                               mbedtls_test_rnd_std_rand, NULL,
                               MBEDTLS_RSA_GEN_KEY_MIN_BITS, 65537), 0);
#else
                TEST_FAIL("I don't know how to create an RSA key pair in this configuration.");
#endif
            } else {
                unsigned char N[PSA_BITS_TO_BYTES(MBEDTLS_RSA_GEN_KEY_MIN_BITS)] = { 0xff };
                N[sizeof(N) - 1] = 0x03;
                const unsigned char E[1] = { 0x03 };
                TEST_EQUAL(mbedtls_rsa_import_raw(rsa,
                                                  N, sizeof(N),
                                                  NULL, 0, NULL, 0, NULL, 0,
                                                  E, sizeof(E)), 0);
                TEST_EQUAL(mbedtls_rsa_complete(rsa), 0);
            }
            break;
        }
#endif /* MBEDTLS_RSA_C */

#if defined(MBEDTLS_PK_HAVE_ECC_KEYS)
        case MBEDTLS_PK_ECKEY:
        case MBEDTLS_PK_ECKEY_DH:
        case MBEDTLS_PK_ECDSA:
        {
            mbedtls_ecp_group_id grp_id = MBEDTLS_TEST_ECP_DP_ONE_CURVE;
            size_t bits;
            *psa_type = PSA_KEY_TYPE_ECC_KEY_PAIR(mbedtls_ecc_group_to_psa(grp_id, &bits));
            TEST_EQUAL(pk_genkey(pk, grp_id), 0);
            if (!want_pair) {
#if defined(MBEDTLS_PK_USE_PSA_EC_DATA)
                psa_key_attributes_t pub_attributes = PSA_KEY_ATTRIBUTES_INIT;
                psa_set_key_type(&pub_attributes,
                                 PSA_KEY_TYPE_PUBLIC_KEY_OF_KEY_PAIR(*psa_type));
                psa_set_key_usage_flags(&pub_attributes,
                                        PSA_KEY_USAGE_EXPORT |
                                        PSA_KEY_USAGE_COPY |
                                        PSA_KEY_USAGE_VERIFY_MESSAGE |
                                        PSA_KEY_USAGE_VERIFY_HASH);
                psa_set_key_algorithm(&pub_attributes, PSA_ALG_ECDSA_ANY);
                PSA_ASSERT(psa_destroy_key(pk->priv_id));
                pk->priv_id = MBEDTLS_SVC_KEY_ID_INIT;
#else
                mbedtls_ecp_keypair *ec = mbedtls_pk_ec_rw(*pk);
                mbedtls_mpi_free(&ec->d);
#endif
            }
            break;
        }
#endif /* MBEDTLS_PK_HAVE_ECC_KEYS */

        default:
            TEST_FAIL("Unknown PK type in test data");
            break;
    }

    if (!want_pair) {
        *psa_type = PSA_KEY_TYPE_PUBLIC_KEY_OF_KEY_PAIR(*psa_type);
    }
    return 0;

exit:
    return MBEDTLS_ERR_ERROR_GENERIC_ERROR;
}
#endif

#if defined(MBEDTLS_PSA_CRYPTO_C)
/* Create a new PSA key which will contain only the public part of the private
 * key which is provided in input. For this new key:
 * - Type is the public counterpart of the private key.
 * - Usage is the copied from the original private key, but the PSA_KEY_USAGE_EXPORT
 *   flag is removed. This is to prove that mbedtls_pk_copy_from_psa() doesn't
 *   require the key to have the EXPORT flag.
 * - Algorithm is copied from the original key pair.
 */
static mbedtls_svc_key_id_t psa_pub_key_from_priv(mbedtls_svc_key_id_t priv_id)
{
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
    psa_key_type_t type;
    psa_algorithm_t alg;
    psa_key_usage_t usage;
    unsigned char pub_key_buf[PSA_EXPORT_PUBLIC_KEY_MAX_SIZE];
    size_t pub_key_len;
    mbedtls_svc_key_id_t pub_key = MBEDTLS_SVC_KEY_ID_INIT;

    /* Get attributes from the private key. */
    PSA_ASSERT(psa_get_key_attributes(priv_id, &attributes));
    type = psa_get_key_type(&attributes);
    usage = psa_get_key_usage_flags(&attributes);
    alg = psa_get_key_algorithm(&attributes);
    psa_reset_key_attributes(&attributes);

    /* Export the public key and then import it in a new slot. */
    PSA_ASSERT(psa_export_public_key(priv_id, pub_key_buf, sizeof(pub_key_buf), &pub_key_len));

    /* Notes:
     * - psa_import_key() automatically determines the key's bit length
     *   from the provided key data. That's why psa_set_key_bits() is not used
     *   below.
     */
    type = PSA_KEY_TYPE_PUBLIC_KEY_OF_KEY_PAIR(type);
    usage &= ~PSA_KEY_USAGE_EXPORT;
    psa_set_key_type(&attributes, type);
    psa_set_key_usage_flags(&attributes, usage);
    psa_set_key_algorithm(&attributes, alg);

    PSA_ASSERT(psa_import_key(&attributes, pub_key_buf, pub_key_len, &pub_key));

exit:
    psa_reset_key_attributes(&attributes);
    return pub_key;
}

/* Create a copy of a PSA key with same usage and algorithm policy and destroy
 * the original one. */
mbedtls_svc_key_id_t psa_copy_and_destroy(mbedtls_svc_key_id_t orig_key_id)
{
    psa_key_attributes_t orig_attr = PSA_KEY_ATTRIBUTES_INIT;
    psa_key_attributes_t new_attr = PSA_KEY_ATTRIBUTES_INIT;
    mbedtls_svc_key_id_t new_key_id = MBEDTLS_SVC_KEY_ID_INIT;

    PSA_ASSERT(psa_get_key_attributes(orig_key_id, &orig_attr));
    psa_set_key_usage_flags(&new_attr, psa_get_key_usage_flags(&orig_attr));
    psa_set_key_algorithm(&new_attr, psa_get_key_algorithm(&orig_attr));

    PSA_ASSERT(psa_copy_key(orig_key_id, &new_attr, &new_key_id));
    psa_destroy_key(orig_key_id);

exit:
    psa_reset_key_attributes(&orig_attr);
    psa_reset_key_attributes(&new_attr);
    return new_key_id;
}

psa_status_t pk_psa_import_key(unsigned char *key_data, size_t key_len,
                               psa_key_type_t type, psa_key_usage_t usage,
                               psa_algorithm_t alg, mbedtls_svc_key_id_t *key)
{
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
    psa_status_t status;

    *key = MBEDTLS_SVC_KEY_ID_INIT;

    /* Note: psa_import_key() automatically determines the key's bit length
     * from the provided key data. That's why psa_set_key_bits() is not used below. */
    psa_set_key_usage_flags(&attributes, usage);
    psa_set_key_algorithm(&attributes, alg);
    psa_set_key_type(&attributes, type);
    status = psa_import_key(&attributes, key_data, key_len, key);

    return status;
}

psa_status_t pk_psa_genkey_generic(psa_key_type_t type, size_t bits,
                                   psa_key_usage_t usage, psa_algorithm_t alg,
                                   mbedtls_svc_key_id_t *key)
{
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
    psa_status_t status;

    *key = MBEDTLS_SVC_KEY_ID_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);
    status = psa_generate_key(&attributes, key);

    return status;
}

/*
 * Generate an ECC key using PSA and return the key identifier of that key,
 * or 0 if the key generation failed.
 * The key uses NIST P-256 and is usable for signing with SHA-256.
 */
mbedtls_svc_key_id_t pk_psa_genkey_ecc(void)
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;

    pk_psa_genkey_generic(PSA_KEY_TYPE_ECC_KEY_PAIR(PSA_ECC_FAMILY_SECP_R1), 256,
                          PSA_KEY_USAGE_SIGN_HASH, PSA_ALG_ECDSA(PSA_ALG_SHA_256),
                          &key);

    return key;
}

/*
 * Generate an RSA key using PSA and return the key identifier of that key,
 * or 0 if the key generation failed.
 */
mbedtls_svc_key_id_t pk_psa_genkey_rsa(void)
{
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;

    pk_psa_genkey_generic(PSA_KEY_TYPE_RSA_KEY_PAIR, 1024, PSA_KEY_USAGE_SIGN_HASH,
                          PSA_ALG_RSA_PKCS1V15_SIGN_RAW, &key);

    return key;
}
#endif /* MBEDTLS_PSA_CRYPTO_C */
/* END_HEADER */

/* BEGIN_DEPENDENCIES
 * depends_on:MBEDTLS_PK_C
 * END_DEPENDENCIES
 */

/* BEGIN_CASE depends_on:MBEDTLS_USE_PSA_CRYPTO */
void pk_psa_utils(int key_is_rsa)
{
    mbedtls_pk_context pk, pk2;
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;

    const char * const name = "Opaque";
    size_t bitlen;

    mbedtls_md_type_t md_alg = MBEDTLS_MD_NONE;
    unsigned char b1[1], b2[1];
    size_t len;
    mbedtls_pk_debug_item dbg;

    mbedtls_pk_init(&pk);
    mbedtls_pk_init(&pk2);
    USE_PSA_INIT();

    TEST_ASSERT(mbedtls_pk_setup_opaque(&pk, MBEDTLS_SVC_KEY_ID_INIT) ==
                MBEDTLS_ERR_PK_BAD_INPUT_DATA);

    mbedtls_pk_free(&pk);
    mbedtls_pk_init(&pk);

    if (key_is_rsa) {
        bitlen = 1024; /* hardcoded in genkey() */
        key = pk_psa_genkey_rsa();
    } else {
        bitlen = 256; /* hardcoded in genkey() */
        key = pk_psa_genkey_ecc();
    }
    if (mbedtls_svc_key_id_is_null(key)) {
        goto exit;
    }

    TEST_ASSERT(mbedtls_pk_setup_opaque(&pk, key) == 0);

    TEST_ASSERT(mbedtls_pk_get_type(&pk) == MBEDTLS_PK_OPAQUE);
    TEST_ASSERT(strcmp(mbedtls_pk_get_name(&pk), name) == 0);

    TEST_ASSERT(mbedtls_pk_get_bitlen(&pk) == bitlen);
    TEST_ASSERT(mbedtls_pk_get_len(&pk) == (bitlen + 7) / 8);

    if (key_is_rsa) {
        TEST_ASSERT(mbedtls_pk_can_do(&pk, MBEDTLS_PK_ECKEY) == 0);
        TEST_ASSERT(mbedtls_pk_can_do(&pk, MBEDTLS_PK_ECDSA) == 0);
        TEST_ASSERT(mbedtls_pk_can_do(&pk, MBEDTLS_PK_RSA) == 1);
    } else {
        TEST_ASSERT(mbedtls_pk_can_do(&pk, MBEDTLS_PK_ECKEY) == 1);
        TEST_ASSERT(mbedtls_pk_can_do(&pk, MBEDTLS_PK_ECDSA) == 1);
        TEST_ASSERT(mbedtls_pk_can_do(&pk, MBEDTLS_PK_RSA) == 0);
    }

    /* unsupported operations: verify, decrypt, encrypt */
    if (key_is_rsa == 1) {
        TEST_ASSERT(mbedtls_pk_verify(&pk, md_alg,
                                      b1, sizeof(b1), b2, sizeof(b2))
                    == MBEDTLS_ERR_PK_TYPE_MISMATCH);
    } else {
        TEST_ASSERT(mbedtls_pk_decrypt(&pk, b1, sizeof(b1),
                                       b2, &len, sizeof(b2),
                                       NULL, NULL)
                    == MBEDTLS_ERR_PK_TYPE_MISMATCH);
    }
    TEST_ASSERT(mbedtls_pk_encrypt(&pk, b1, sizeof(b1),
                                   b2, &len, sizeof(b2),
                                   NULL, NULL)
                == MBEDTLS_ERR_PK_TYPE_MISMATCH);

    /* unsupported functions: check_pair, debug */
    if (key_is_rsa) {
        TEST_ASSERT(mbedtls_pk_setup(&pk2,
                                     mbedtls_pk_info_from_type(MBEDTLS_PK_RSA)) == 0);
    } else {
        TEST_ASSERT(mbedtls_pk_setup(&pk2,
                                     mbedtls_pk_info_from_type(MBEDTLS_PK_ECKEY)) == 0);
    }
    TEST_ASSERT(mbedtls_pk_check_pair(&pk, &pk2,
                                      mbedtls_test_rnd_std_rand, NULL)
                == MBEDTLS_ERR_PK_TYPE_MISMATCH);
    TEST_ASSERT(mbedtls_pk_debug(&pk, &dbg)
                == MBEDTLS_ERR_PK_TYPE_MISMATCH);

    /* test that freeing the context does not destroy the key */
    mbedtls_pk_free(&pk);
    TEST_ASSERT(PSA_SUCCESS == psa_get_key_attributes(key, &attributes));
    TEST_ASSERT(PSA_SUCCESS == psa_destroy_key(key));

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

    mbedtls_pk_free(&pk);   /* redundant except upon error */
    mbedtls_pk_free(&pk2);
    USE_PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE depends_on:MBEDTLS_USE_PSA_CRYPTO */
void pk_can_do_ext(int opaque_key, int key_type, int key_usage, int key_alg,
                   int key_alg2, int curve_or_keybits, int alg_check, int usage_check,
                   int result)
{
    mbedtls_pk_context pk;
    mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;

    mbedtls_pk_init(&pk);
    USE_PSA_INIT();

    if (opaque_key == 1) {
        psa_set_key_usage_flags(&attributes, key_usage);
        psa_set_key_algorithm(&attributes, key_alg);
        if (key_alg2 != 0) {
            psa_set_key_enrollment_algorithm(&attributes, key_alg2);
        }
        psa_set_key_type(&attributes, key_type);
        psa_set_key_bits(&attributes, curve_or_keybits);

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

        if (mbedtls_svc_key_id_is_null(key)) {
            goto exit;
        }

        TEST_EQUAL(mbedtls_pk_setup_opaque(&pk, key), 0);

        TEST_EQUAL(mbedtls_pk_get_type(&pk), MBEDTLS_PK_OPAQUE);
    } else {
        TEST_EQUAL(mbedtls_pk_setup(&pk,
                                    mbedtls_pk_info_from_type(key_type)), 0);
        TEST_EQUAL(pk_genkey(&pk, curve_or_keybits), 0);
        TEST_EQUAL(mbedtls_pk_get_type(&pk), key_type);
    }

    TEST_EQUAL(mbedtls_pk_can_do_ext(&pk, alg_check, usage_check), result);

exit:
    psa_reset_key_attributes(&attributes);
    PSA_ASSERT(psa_destroy_key(key));
    mbedtls_pk_free(&pk);
    USE_PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE */
void pk_invalid_param()
{
    mbedtls_pk_context ctx;
    mbedtls_pk_type_t pk_type = 0;
    unsigned char buf[] = { 0x01, 0x02, 0x03, 0x04, 0x05, 0x06 };
    size_t buf_size = sizeof(buf);

    mbedtls_pk_init(&ctx);
    USE_PSA_INIT();

    TEST_EQUAL(MBEDTLS_ERR_PK_BAD_INPUT_DATA,
               mbedtls_pk_verify_restartable(&ctx, MBEDTLS_MD_NONE,
                                             NULL, buf_size,
                                             buf, buf_size,
                                             NULL));
    TEST_EQUAL(MBEDTLS_ERR_PK_BAD_INPUT_DATA,
               mbedtls_pk_verify_restartable(&ctx, MBEDTLS_MD_SHA256,
                                             NULL, 0,
                                             buf, buf_size,
                                             NULL));
    TEST_EQUAL(MBEDTLS_ERR_PK_BAD_INPUT_DATA,
               mbedtls_pk_verify_ext(pk_type, NULL,
                                     &ctx, MBEDTLS_MD_NONE,
                                     NULL, buf_size,
                                     buf, buf_size));
    TEST_EQUAL(MBEDTLS_ERR_PK_BAD_INPUT_DATA,
               mbedtls_pk_verify_ext(pk_type, NULL,
                                     &ctx, MBEDTLS_MD_SHA256,
                                     NULL, 0,
                                     buf, buf_size));
    TEST_EQUAL(MBEDTLS_ERR_PK_BAD_INPUT_DATA,
               mbedtls_pk_sign_restartable(&ctx, MBEDTLS_MD_NONE,
                                           NULL, buf_size,
                                           buf, buf_size, &buf_size,
                                           NULL, NULL,
                                           NULL));
    TEST_EQUAL(MBEDTLS_ERR_PK_BAD_INPUT_DATA,
               mbedtls_pk_sign_restartable(&ctx, MBEDTLS_MD_SHA256,
                                           NULL, 0,
                                           buf, buf_size, &buf_size,
                                           NULL, NULL,
                                           NULL));
    TEST_EQUAL(MBEDTLS_ERR_PK_BAD_INPUT_DATA,
               mbedtls_pk_sign_ext(pk_type, &ctx, MBEDTLS_MD_NONE,
                                   NULL, buf_size,
                                   buf, buf_size, &buf_size,
                                   NULL, NULL));
    TEST_EQUAL(MBEDTLS_ERR_PK_BAD_INPUT_DATA,
               mbedtls_pk_sign_ext(pk_type, &ctx, MBEDTLS_MD_SHA256,
                                   NULL, 0,
                                   buf, buf_size, &buf_size,
                                   NULL, NULL));
exit:
    mbedtls_pk_free(&ctx);
    USE_PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE */
void valid_parameters()
{
    mbedtls_pk_context pk;
    unsigned char buf[1];
    size_t len;
    void *options = NULL;

    mbedtls_pk_init(&pk);
    USE_PSA_INIT();

    TEST_ASSERT(mbedtls_pk_setup(&pk, NULL) ==
                MBEDTLS_ERR_PK_BAD_INPUT_DATA);

    /* In informational functions, we accept NULL where a context pointer
     * is expected because that's what the library has done forever.
     * We do not document that NULL is accepted, so we may wish to change
     * the behavior in a future version. */
    TEST_ASSERT(mbedtls_pk_get_bitlen(NULL) == 0);
    TEST_ASSERT(mbedtls_pk_get_len(NULL) == 0);
    TEST_ASSERT(mbedtls_pk_can_do(NULL, MBEDTLS_PK_NONE) == 0);

    TEST_ASSERT(mbedtls_pk_sign_restartable(&pk,
                                            MBEDTLS_MD_NONE,
                                            NULL, 0,
                                            buf, sizeof(buf), &len,
                                            mbedtls_test_rnd_std_rand, NULL,
                                            NULL) ==
                MBEDTLS_ERR_PK_BAD_INPUT_DATA);

    TEST_ASSERT(mbedtls_pk_sign(&pk,
                                MBEDTLS_MD_NONE,
                                NULL, 0,
                                buf, sizeof(buf), &len,
                                mbedtls_test_rnd_std_rand, NULL) ==
                MBEDTLS_ERR_PK_BAD_INPUT_DATA);

    TEST_ASSERT(mbedtls_pk_sign_ext(MBEDTLS_PK_NONE, &pk,
                                    MBEDTLS_MD_NONE,
                                    NULL, 0,
                                    buf, sizeof(buf), &len,
                                    mbedtls_test_rnd_std_rand, NULL) ==
                MBEDTLS_ERR_PK_BAD_INPUT_DATA);

    TEST_ASSERT(mbedtls_pk_verify_restartable(&pk,
                                              MBEDTLS_MD_NONE,
                                              NULL, 0,
                                              buf, sizeof(buf),
                                              NULL) ==
                MBEDTLS_ERR_PK_BAD_INPUT_DATA);

    TEST_ASSERT(mbedtls_pk_verify(&pk,
                                  MBEDTLS_MD_NONE,
                                  NULL, 0,
                                  buf, sizeof(buf)) ==
                MBEDTLS_ERR_PK_BAD_INPUT_DATA);

    TEST_ASSERT(mbedtls_pk_verify_ext(MBEDTLS_PK_NONE, options,
                                      &pk,
                                      MBEDTLS_MD_NONE,
                                      NULL, 0,
                                      buf, sizeof(buf)) ==
                MBEDTLS_ERR_PK_BAD_INPUT_DATA);

    TEST_ASSERT(mbedtls_pk_encrypt(&pk,
                                   NULL, 0,
                                   NULL, &len, 0,
                                   mbedtls_test_rnd_std_rand, NULL) ==
                MBEDTLS_ERR_PK_BAD_INPUT_DATA);

    TEST_ASSERT(mbedtls_pk_decrypt(&pk,
                                   NULL, 0,
                                   NULL, &len, 0,
                                   mbedtls_test_rnd_std_rand, NULL) ==
                MBEDTLS_ERR_PK_BAD_INPUT_DATA);

#if defined(MBEDTLS_PK_PARSE_C)
    TEST_ASSERT(mbedtls_pk_parse_key(&pk, NULL, 0, NULL, 1,
                                     mbedtls_test_rnd_std_rand, NULL) ==
                MBEDTLS_ERR_PK_KEY_INVALID_FORMAT);

    TEST_ASSERT(mbedtls_pk_parse_public_key(&pk, NULL, 0) ==
                MBEDTLS_ERR_PK_KEY_INVALID_FORMAT);
#endif /* MBEDTLS_PK_PARSE_C */
    USE_PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE depends_on:MBEDTLS_PK_WRITE_C:MBEDTLS_PK_PARSE_C */
void valid_parameters_pkwrite(data_t *key_data)
{
    mbedtls_pk_context pk;

    /* For the write tests to be effective, we need a valid key pair. */
    mbedtls_pk_init(&pk);
    USE_PSA_INIT();

    TEST_ASSERT(mbedtls_pk_parse_key(&pk,
                                     key_data->x, key_data->len, NULL, 0,
                                     mbedtls_test_rnd_std_rand, NULL) == 0);

    TEST_ASSERT(mbedtls_pk_write_key_der(&pk, NULL, 0) ==
                MBEDTLS_ERR_ASN1_BUF_TOO_SMALL);

    TEST_ASSERT(mbedtls_pk_write_pubkey_der(&pk, NULL, 0) ==
                MBEDTLS_ERR_ASN1_BUF_TOO_SMALL);

#if defined(MBEDTLS_PEM_WRITE_C)
    TEST_ASSERT(mbedtls_pk_write_key_pem(&pk, NULL, 0) ==
                MBEDTLS_ERR_BASE64_BUFFER_TOO_SMALL);

    TEST_ASSERT(mbedtls_pk_write_pubkey_pem(&pk, NULL, 0) ==
                MBEDTLS_ERR_BASE64_BUFFER_TOO_SMALL);
#endif /* MBEDTLS_PEM_WRITE_C */

exit:
    mbedtls_pk_free(&pk);
    USE_PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE */
void pk_utils(int type, int curve_or_keybits, int bitlen, int len, char *name)
{
    mbedtls_pk_context pk;

    mbedtls_pk_init(&pk);
    USE_PSA_INIT();

    TEST_ASSERT(mbedtls_pk_setup(&pk, mbedtls_pk_info_from_type(type)) == 0);
    TEST_ASSERT(pk_genkey(&pk, curve_or_keybits) == 0);

    TEST_ASSERT((int) mbedtls_pk_get_type(&pk) == type);
    TEST_ASSERT(mbedtls_pk_can_do(&pk, type));
    TEST_ASSERT(mbedtls_pk_get_bitlen(&pk) == (unsigned) bitlen);
    TEST_ASSERT(mbedtls_pk_get_len(&pk) == (unsigned) len);
    TEST_ASSERT(strcmp(mbedtls_pk_get_name(&pk), name) == 0);

exit:
    mbedtls_pk_free(&pk);
    USE_PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE depends_on:MBEDTLS_PK_PARSE_C:MBEDTLS_FS_IO */
void mbedtls_pk_check_pair(char *pub_file, char *prv_file, int ret)
{
    mbedtls_pk_context pub, prv, alt;
#if defined(MBEDTLS_USE_PSA_CRYPTO)
    mbedtls_svc_key_id_t opaque_key_id = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_attributes_t opaque_key_attr = PSA_KEY_ATTRIBUTES_INIT;
    int is_ec_key = 0;
#endif /* MBEDTLS_USE_PSA_CRYPTO */

    mbedtls_pk_init(&pub);
    mbedtls_pk_init(&prv);
    mbedtls_pk_init(&alt);
    USE_PSA_INIT();

#if defined(MBEDTLS_USE_PSA_CRYPTO)
    /* mbedtls_pk_check_pair() returns either PK or ECP error codes depending
       on MBEDTLS_USE_PSA_CRYPTO so here we dynamically translate between the
       two */
    if (ret == MBEDTLS_ERR_ECP_BAD_INPUT_DATA) {
        ret = MBEDTLS_ERR_PK_BAD_INPUT_DATA;
    }
#endif /* MBEDTLS_USE_PSA_CRYPTO */

    TEST_ASSERT(mbedtls_pk_parse_public_keyfile(&pub, pub_file) == 0);
    TEST_ASSERT(mbedtls_pk_parse_keyfile(&prv, prv_file, NULL,
                                         mbedtls_test_rnd_std_rand, NULL)
                == 0);

    TEST_ASSERT(mbedtls_pk_check_pair(&pub, &prv,
                                      mbedtls_test_rnd_std_rand, NULL)
                == ret);

#if defined(MBEDTLS_RSA_C) && defined(MBEDTLS_PK_RSA_ALT_SUPPORT)
    if (mbedtls_pk_get_type(&prv) == MBEDTLS_PK_RSA) {
        TEST_ASSERT(mbedtls_pk_setup_rsa_alt(&alt, mbedtls_pk_rsa(prv),
                                             mbedtls_rsa_decrypt_func, mbedtls_rsa_sign_func,
                                             mbedtls_rsa_key_len_func) == 0);
        TEST_ASSERT(mbedtls_pk_check_pair(&pub, &alt,
                                          mbedtls_test_rnd_std_rand, NULL)
                    == ret);
    }
#endif
#if defined(MBEDTLS_USE_PSA_CRYPTO)
    is_ec_key = (mbedtls_pk_get_type(&prv) == MBEDTLS_PK_ECKEY);
    /* Turn the prv PK context into an opaque one.*/
    TEST_EQUAL(mbedtls_pk_get_psa_attributes(&prv, PSA_KEY_USAGE_SIGN_HASH,
                                             &opaque_key_attr), 0);
    TEST_EQUAL(mbedtls_pk_import_into_psa(&prv, &opaque_key_attr, &opaque_key_id), 0);
    mbedtls_pk_free(&prv);
    mbedtls_pk_init(&prv);
    TEST_EQUAL(mbedtls_pk_setup_opaque(&prv, opaque_key_id), 0);
    /* Test check_pair() between the opaque key we just created and the public PK counterpart.
     * Note: opaque EC keys support check_pair(), whereas RSA ones do not. */
    if (is_ec_key) {
        TEST_EQUAL(mbedtls_pk_check_pair(&pub, &prv, mbedtls_test_rnd_std_rand,
                                         NULL), ret);
    } else {
        TEST_EQUAL(mbedtls_pk_check_pair(&pub, &prv, mbedtls_test_rnd_std_rand,
                                         NULL), MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE);
    }
#endif

exit:
#if defined(MBEDTLS_USE_PSA_CRYPTO)
    psa_destroy_key(opaque_key_id);
#endif /* MBEDTLS_USE_PSA_CRYPTO */
    mbedtls_pk_free(&pub);
    mbedtls_pk_free(&prv);
    mbedtls_pk_free(&alt);
    USE_PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE depends_on:MBEDTLS_RSA_C */
void pk_rsa_verify_test_vec(data_t *message_str, int padding, int digest,
                            int mod, char *input_N, char *input_E,
                            data_t *result_str, int expected_result)
{
    mbedtls_rsa_context *rsa;
    mbedtls_pk_context pk;
    mbedtls_pk_restart_ctx *rs_ctx = NULL;
#if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE)
    mbedtls_pk_restart_ctx ctx;

    rs_ctx = &ctx;
    mbedtls_pk_restart_init(rs_ctx);
    // this setting would ensure restart would happen if ECC was used
    mbedtls_ecp_set_max_ops(1);
#endif

    mbedtls_pk_init(&pk);
    MD_OR_USE_PSA_INIT();

    TEST_ASSERT(mbedtls_pk_setup(&pk, mbedtls_pk_info_from_type(MBEDTLS_PK_RSA)) == 0);
    rsa = mbedtls_pk_rsa(pk);

    rsa->len = (mod + 7) / 8;
    if (padding >= 0) {
        TEST_EQUAL(mbedtls_rsa_set_padding(rsa, padding, MBEDTLS_MD_NONE), 0);
    }

    TEST_ASSERT(mbedtls_test_read_mpi(&rsa->N, input_N) == 0);
    TEST_ASSERT(mbedtls_test_read_mpi(&rsa->E, input_E) == 0);

    int actual_result;
    actual_result = mbedtls_pk_verify(&pk, digest, message_str->x, 0,
                                      result_str->x, mbedtls_pk_get_len(&pk));
#if !defined(MBEDTLS_USE_PSA_CRYPTO)
    if (actual_result == MBEDTLS_ERR_RSA_INVALID_PADDING &&
        expected_result == MBEDTLS_ERR_RSA_VERIFY_FAILED) {
        /* Tolerate INVALID_PADDING error for an invalid signature with
         * the legacy API (but not with PSA). */
    } else
#endif
    {
        TEST_EQUAL(actual_result, expected_result);
    }

    actual_result = mbedtls_pk_verify_restartable(&pk, digest, message_str->x, 0,
                                                  result_str->x,
                                                  mbedtls_pk_get_len(&pk),
                                                  rs_ctx);
#if !defined(MBEDTLS_USE_PSA_CRYPTO)
    if (actual_result == MBEDTLS_ERR_RSA_INVALID_PADDING &&
        expected_result == MBEDTLS_ERR_RSA_VERIFY_FAILED) {
        /* Tolerate INVALID_PADDING error for an invalid signature with
         * the legacy API (but not with PSA). */
    } else
#endif
    {
        TEST_EQUAL(actual_result, expected_result);
    }

exit:
#if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE)
    mbedtls_pk_restart_free(rs_ctx);
#endif
    mbedtls_pk_free(&pk);
    MD_OR_USE_PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE depends_on:MBEDTLS_RSA_C */
void pk_rsa_verify_ext_test_vec(data_t *message_str, int digest,
                                int mod, char *input_N,
                                char *input_E, data_t *result_str,
                                int pk_type, int mgf1_hash_id,
                                int salt_len, int sig_len,
                                int result)
{
    mbedtls_rsa_context *rsa;
    mbedtls_pk_context pk;
    mbedtls_pk_rsassa_pss_options pss_opts;
    void *options;
    int ret;

    mbedtls_pk_init(&pk);
    MD_OR_USE_PSA_INIT();

    TEST_ASSERT(mbedtls_pk_setup(&pk, mbedtls_pk_info_from_type(MBEDTLS_PK_RSA)) == 0);
    rsa = mbedtls_pk_rsa(pk);

    rsa->len = (mod + 7) / 8;
    TEST_ASSERT(mbedtls_test_read_mpi(&rsa->N, input_N) == 0);
    TEST_ASSERT(mbedtls_test_read_mpi(&rsa->E, input_E) == 0);


    if (mgf1_hash_id < 0) {
        options = NULL;
    } else {
        options = &pss_opts;

        pss_opts.mgf1_hash_id = mgf1_hash_id;
        pss_opts.expected_salt_len = salt_len;
    }

    ret = mbedtls_pk_verify_ext(pk_type, options, &pk,
                                digest, message_str->x, message_str->len,
                                result_str->x, sig_len);

#if defined(MBEDTLS_USE_PSA_CRYPTO)
    if (result == MBEDTLS_ERR_RSA_INVALID_PADDING) {
        /* Mbed TLS distinguishes "invalid padding" from "valid padding but
         * the rest of the signature is invalid". This has little use in
         * practice and PSA doesn't report this distinction.
         * In this case, PSA returns PSA_ERROR_INVALID_SIGNATURE translated
         * to MBEDTLS_ERR_RSA_VERIFY_FAILED.
         * However, currently `mbedtls_pk_verify_ext()` may use either the
         * PSA or the Mbed TLS API, depending on the PSS options used.
         * So, it may return either INVALID_PADDING or INVALID_SIGNATURE.
         */
        TEST_ASSERT(ret == result || ret == MBEDTLS_ERR_RSA_VERIFY_FAILED);
    } else
#endif
    {
        TEST_EQUAL(ret, result);
    }

exit:
    mbedtls_pk_free(&pk);
    MD_OR_USE_PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE depends_on:MBEDTLS_PK_CAN_ECDSA_VERIFY */
void pk_ec_test_vec(int type, int id, data_t *key, data_t *hash,
                    data_t *sig, int ret)
{
    mbedtls_pk_context pk;

    mbedtls_pk_init(&pk);
    USE_PSA_INIT();

    TEST_ASSERT(mbedtls_pk_setup(&pk, mbedtls_pk_info_from_type(type)) == 0);

    TEST_ASSERT(mbedtls_pk_can_do(&pk, MBEDTLS_PK_ECDSA));
#if defined(MBEDTLS_PK_USE_PSA_EC_DATA)
    TEST_ASSERT(key->len <= MBEDTLS_PK_MAX_EC_PUBKEY_RAW_LEN);
    memcpy(pk.pub_raw, key->x, key->len);
    pk.ec_family = mbedtls_ecc_group_to_psa(id, &(pk.ec_bits));
    pk.pub_raw_len = key->len;
#else
    mbedtls_ecp_keypair *eckey = (mbedtls_ecp_keypair *) mbedtls_pk_ec(pk);

    TEST_ASSERT(mbedtls_ecp_group_load(&eckey->grp, id) == 0);
    TEST_ASSERT(mbedtls_ecp_point_read_binary(&eckey->grp, &eckey->Q,
                                              key->x, key->len) == 0);
#endif

    // MBEDTLS_MD_NONE is used since it will be ignored.
    TEST_ASSERT(mbedtls_pk_verify(&pk, MBEDTLS_MD_NONE,
                                  hash->x, hash->len, sig->x, sig->len) == ret);

exit:
    mbedtls_pk_free(&pk);
    USE_PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE depends_on:MBEDTLS_ECP_RESTARTABLE:MBEDTLS_ECDSA_C:MBEDTLS_ECDSA_DETERMINISTIC */
void pk_sign_verify_restart(int pk_type, int grp_id, char *d_str,
                            char *QX_str, char *QY_str,
                            int md_alg, data_t *hash, data_t *sig_check,
                            int max_ops, int min_restart, int max_restart)
{
    int ret, cnt_restart;
    mbedtls_pk_restart_ctx rs_ctx;
    mbedtls_pk_context prv, pub;
    unsigned char sig[MBEDTLS_ECDSA_MAX_LEN];
    size_t slen;

    mbedtls_pk_restart_init(&rs_ctx);
    mbedtls_pk_init(&prv);
    mbedtls_pk_init(&pub);
    USE_PSA_INIT();

    memset(sig, 0, sizeof(sig));

    TEST_ASSERT(mbedtls_pk_setup(&prv, mbedtls_pk_info_from_type(pk_type)) == 0);
    TEST_ASSERT(mbedtls_ecp_group_load(&mbedtls_pk_ec_rw(prv)->grp, grp_id) == 0);
    TEST_ASSERT(mbedtls_test_read_mpi(&mbedtls_pk_ec_rw(prv)->d, d_str) == 0);

    TEST_ASSERT(mbedtls_pk_setup(&pub, mbedtls_pk_info_from_type(pk_type)) == 0);
    TEST_ASSERT(mbedtls_ecp_group_load(&mbedtls_pk_ec_rw(pub)->grp, grp_id) == 0);
    TEST_ASSERT(mbedtls_ecp_point_read_string(&mbedtls_pk_ec_rw(pub)->Q, 16, QX_str, QY_str) == 0);

    mbedtls_ecp_set_max_ops(max_ops);

    slen = sizeof(sig);
    cnt_restart = 0;
    do {
        ret = mbedtls_pk_sign_restartable(&prv, md_alg, hash->x, hash->len,
                                          sig, sizeof(sig), &slen,
                                          mbedtls_test_rnd_std_rand, NULL,
                                          &rs_ctx);
    } while (ret == MBEDTLS_ERR_ECP_IN_PROGRESS && ++cnt_restart);

    TEST_ASSERT(ret == 0);
    TEST_ASSERT(slen == sig_check->len);
    TEST_ASSERT(memcmp(sig, sig_check->x, slen) == 0);

    TEST_ASSERT(cnt_restart >= min_restart);
    TEST_ASSERT(cnt_restart <= max_restart);

    cnt_restart = 0;
    do {
        ret = mbedtls_pk_verify_restartable(&pub, md_alg,
                                            hash->x, hash->len, sig, slen, &rs_ctx);
    } while (ret == MBEDTLS_ERR_ECP_IN_PROGRESS && ++cnt_restart);

    TEST_ASSERT(ret == 0);
    TEST_ASSERT(cnt_restart >= min_restart);
    TEST_ASSERT(cnt_restart <= max_restart);

    sig[0]++;
    do {
        ret = mbedtls_pk_verify_restartable(&pub, md_alg,
                                            hash->x, hash->len, sig, slen, &rs_ctx);
    } while (ret == MBEDTLS_ERR_ECP_IN_PROGRESS);
    TEST_ASSERT(ret != 0);
    sig[0]--;

    /* Do we leak memory when aborting? try verify then sign
     * This test only makes sense when we actually restart */
    if (min_restart > 0) {
        ret = mbedtls_pk_verify_restartable(&pub, md_alg,
                                            hash->x, hash->len, sig, slen, &rs_ctx);
        TEST_ASSERT(ret == MBEDTLS_ERR_ECP_IN_PROGRESS);
        mbedtls_pk_restart_free(&rs_ctx);

        slen = sizeof(sig);
        ret = mbedtls_pk_sign_restartable(&prv, md_alg, hash->x, hash->len,
                                          sig, sizeof(sig), &slen,
                                          mbedtls_test_rnd_std_rand, NULL,
                                          &rs_ctx);
        TEST_ASSERT(ret == MBEDTLS_ERR_ECP_IN_PROGRESS);
    }

exit:
    mbedtls_pk_restart_free(&rs_ctx);
    mbedtls_pk_free(&prv);
    mbedtls_pk_free(&pub);
    USE_PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE depends_on:MBEDTLS_MD_CAN_SHA256:PK_CAN_SIGN_SOME */
void pk_sign_verify(int type, int curve_or_keybits, int rsa_padding, int rsa_md_alg,
                    int sign_ret, int verify_ret)
{
    mbedtls_pk_context pk;
    size_t sig_len;
    unsigned char hash[32]; // Hard-coded for SHA256
    size_t hash_len = sizeof(hash);
    unsigned char sig[MBEDTLS_PK_SIGNATURE_MAX_SIZE];
    void *rs_ctx = NULL;
#if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE)
    mbedtls_pk_restart_ctx ctx;

    rs_ctx = &ctx;
    mbedtls_pk_restart_init(rs_ctx);
    /* This value is large enough that the operation will complete in one run.
     * See comments at the top of ecp_test_vect_restart in
     * test_suite_ecp.function for estimates of operation counts. */
    mbedtls_ecp_set_max_ops(42000);
#endif

    mbedtls_pk_init(&pk);
    MD_OR_USE_PSA_INIT();

    memset(hash, 0x2a, sizeof(hash));
    memset(sig, 0, sizeof(sig));

    TEST_ASSERT(mbedtls_pk_setup(&pk, mbedtls_pk_info_from_type(type)) == 0);
    TEST_ASSERT(pk_genkey(&pk, curve_or_keybits) == 0);

#if defined(MBEDTLS_RSA_C)
    if (type == MBEDTLS_PK_RSA) {
        TEST_ASSERT(mbedtls_rsa_set_padding(mbedtls_pk_rsa(pk), rsa_padding, rsa_md_alg) == 0);
    }
#else
    (void) rsa_padding;
    (void) rsa_md_alg;
#endif /* MBEDTLS_RSA_C */

    TEST_ASSERT(mbedtls_pk_sign_restartable(&pk, MBEDTLS_MD_SHA256,
                                            hash, hash_len,
                                            sig, sizeof(sig), &sig_len,
                                            mbedtls_test_rnd_std_rand, NULL,
                                            rs_ctx) == sign_ret);
    if (sign_ret == 0) {
        TEST_ASSERT(sig_len <= MBEDTLS_PK_SIGNATURE_MAX_SIZE);
    } else {
        sig_len = MBEDTLS_PK_SIGNATURE_MAX_SIZE;
    }

    TEST_ASSERT(mbedtls_pk_verify(&pk, MBEDTLS_MD_SHA256,
                                  hash, hash_len, sig, sig_len) == verify_ret);

    if (verify_ret == 0) {
        hash[0]++;
        TEST_ASSERT(mbedtls_pk_verify(&pk, MBEDTLS_MD_SHA256,
                                      hash, hash_len, sig, sig_len) != 0);
        hash[0]--;

        sig[0]++;
        TEST_ASSERT(mbedtls_pk_verify(&pk, MBEDTLS_MD_SHA256,
                                      hash, hash_len, sig, sig_len) != 0);
        sig[0]--;
    }

    TEST_ASSERT(mbedtls_pk_sign(&pk, MBEDTLS_MD_SHA256, hash, hash_len,
                                sig, sizeof(sig), &sig_len,
                                mbedtls_test_rnd_std_rand,
                                NULL) == sign_ret);
    if (sign_ret == 0) {
        TEST_ASSERT(sig_len <= MBEDTLS_PK_SIGNATURE_MAX_SIZE);
    } else {
        sig_len = MBEDTLS_PK_SIGNATURE_MAX_SIZE;
    }

    TEST_ASSERT(mbedtls_pk_verify_restartable(&pk, MBEDTLS_MD_SHA256,
                                              hash, hash_len, sig, sig_len, rs_ctx) == verify_ret);

    if (verify_ret == 0) {
        hash[0]++;
        TEST_ASSERT(mbedtls_pk_verify_restartable(&pk, MBEDTLS_MD_SHA256,
                                                  hash, sizeof(hash), sig, sig_len, rs_ctx) != 0);
        hash[0]--;

        sig[0]++;
        TEST_ASSERT(mbedtls_pk_verify_restartable(&pk, MBEDTLS_MD_SHA256,
                                                  hash, sizeof(hash), sig, sig_len, rs_ctx) != 0);
        sig[0]--;
    }

exit:
#if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE)
    mbedtls_pk_restart_free(rs_ctx);
#endif
    mbedtls_pk_free(&pk);
    MD_OR_USE_PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE depends_on:MBEDTLS_RSA_C */
void pk_rsa_encrypt_decrypt_test(data_t *message, int mod, int padding,
                                 char *input_P, char *input_Q,
                                 char *input_N, char *input_E,
                                 int ret)
{
    unsigned char output[300], result[300];
    mbedtls_test_rnd_pseudo_info rnd_info;
    mbedtls_mpi N, P, Q, E;
    mbedtls_rsa_context *rsa;
    mbedtls_pk_context pk;
    size_t olen, rlen;

    mbedtls_pk_init(&pk);
    mbedtls_mpi_init(&N); mbedtls_mpi_init(&P);
    mbedtls_mpi_init(&Q); mbedtls_mpi_init(&E);
    MD_OR_USE_PSA_INIT();

    memset(&rnd_info,  0, sizeof(mbedtls_test_rnd_pseudo_info));
    memset(output,     0, sizeof(output));

    /* encryption test */

    /* init pk-rsa context */
    TEST_ASSERT(mbedtls_pk_setup(&pk, mbedtls_pk_info_from_type(MBEDTLS_PK_RSA)) == 0);
    rsa = mbedtls_pk_rsa(pk);
    mbedtls_rsa_set_padding(rsa, padding, MBEDTLS_MD_SHA1);

    /* load public key */
    rsa->len = (mod + 7) / 8;
    TEST_ASSERT(mbedtls_test_read_mpi(&rsa->N, input_N) == 0);
    TEST_ASSERT(mbedtls_test_read_mpi(&rsa->E, input_E) == 0);

    TEST_ASSERT(mbedtls_pk_encrypt(&pk, message->x, message->len,
                                   output, &olen, sizeof(output),
                                   mbedtls_test_rnd_pseudo_rand, &rnd_info) == ret);

    /* decryption test */
    mbedtls_mpi_init(&N); mbedtls_mpi_init(&P);
    mbedtls_mpi_init(&Q); mbedtls_mpi_init(&E);

    /* init pk-rsa context */
    mbedtls_pk_free(&pk);
    TEST_ASSERT(mbedtls_pk_setup(&pk,
                                 mbedtls_pk_info_from_type(MBEDTLS_PK_RSA)) == 0);
    rsa = mbedtls_pk_rsa(pk);
    mbedtls_rsa_set_padding(rsa, padding, MBEDTLS_MD_SHA1);

    /* load public key */
    TEST_ASSERT(mbedtls_test_read_mpi(&N, input_N) == 0);
    TEST_ASSERT(mbedtls_test_read_mpi(&E, input_E) == 0);

    /* load private key */
    TEST_ASSERT(mbedtls_test_read_mpi(&P, input_P) == 0);
    TEST_ASSERT(mbedtls_test_read_mpi(&Q, input_Q) == 0);
    TEST_ASSERT(mbedtls_rsa_import(rsa, &N, &P, &Q, NULL, &E) == 0);
    TEST_EQUAL(mbedtls_rsa_get_len(rsa), (mod + 7) / 8);
    TEST_ASSERT(mbedtls_rsa_complete(rsa) == 0);

    TEST_EQUAL(mbedtls_pk_get_len(&pk), (mod + 7) / 8);
    TEST_EQUAL(mbedtls_pk_get_bitlen(&pk), mod);

    memset(result, 0, sizeof(result));
    rlen = 0;
    TEST_ASSERT(mbedtls_pk_decrypt(&pk, output, olen,
                                   result, &rlen, sizeof(result),
                                   mbedtls_test_rnd_pseudo_rand, &rnd_info) == ret);
    if (ret == 0) {
        TEST_ASSERT(rlen == message->len);
        TEST_ASSERT(memcmp(result, message->x, rlen) == 0);
    }

exit:
    mbedtls_mpi_free(&N); mbedtls_mpi_free(&P);
    mbedtls_mpi_free(&Q); mbedtls_mpi_free(&E);
    mbedtls_pk_free(&pk);
    MD_OR_USE_PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE depends_on:MBEDTLS_RSA_C */
void pk_rsa_decrypt_test_vec(data_t *cipher, int mod, int padding, int md_alg,
                             char *input_P, char *input_Q,
                             char *input_N, char *input_E,
                             data_t *clear, int ret)
{
    unsigned char output[256];
    mbedtls_test_rnd_pseudo_info rnd_info;
    mbedtls_mpi N, P, Q, E;
    mbedtls_rsa_context *rsa;
    mbedtls_pk_context pk;
    size_t olen;

    mbedtls_pk_init(&pk);
    mbedtls_mpi_init(&N); mbedtls_mpi_init(&P);
    mbedtls_mpi_init(&Q); mbedtls_mpi_init(&E);
    MD_OR_USE_PSA_INIT();

    memset(&rnd_info,  0, sizeof(mbedtls_test_rnd_pseudo_info));

    /* init pk-rsa context */
    TEST_ASSERT(mbedtls_pk_setup(&pk, mbedtls_pk_info_from_type(MBEDTLS_PK_RSA)) == 0);
    rsa = mbedtls_pk_rsa(pk);

    /* load public key */
    TEST_ASSERT(mbedtls_test_read_mpi(&N, input_N) == 0);
    TEST_ASSERT(mbedtls_test_read_mpi(&E, input_E) == 0);

    /* load private key */
    TEST_ASSERT(mbedtls_test_read_mpi(&P, input_P) == 0);
    TEST_ASSERT(mbedtls_test_read_mpi(&Q, input_Q) == 0);
    TEST_ASSERT(mbedtls_rsa_import(rsa, &N, &P, &Q, NULL, &E) == 0);
    TEST_EQUAL(mbedtls_rsa_get_len(rsa), (mod + 7) / 8);
    TEST_ASSERT(mbedtls_rsa_complete(rsa) == 0);

    TEST_EQUAL(mbedtls_pk_get_bitlen(&pk), mod);
    TEST_EQUAL(mbedtls_pk_get_len(&pk), (mod + 7) / 8);

    /* set padding mode */
    if (padding >= 0) {
        TEST_EQUAL(mbedtls_rsa_set_padding(rsa, padding, md_alg), 0);
    }

    /* decryption test */
    memset(output, 0, sizeof(output));
    olen = 0;
    TEST_ASSERT(mbedtls_pk_decrypt(&pk, cipher->x, cipher->len,
                                   output, &olen, sizeof(output),
                                   mbedtls_test_rnd_pseudo_rand, &rnd_info) == ret);
    if (ret == 0) {
        TEST_ASSERT(olen == clear->len);
        TEST_ASSERT(memcmp(output, clear->x, olen) == 0);
    }

exit:
    mbedtls_mpi_free(&N); mbedtls_mpi_free(&P);
    mbedtls_mpi_free(&Q); mbedtls_mpi_free(&E);
    mbedtls_pk_free(&pk);
    MD_OR_USE_PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE depends_on:MBEDTLS_RSA_C:MBEDTLS_USE_PSA_CRYPTO */
void pk_wrap_rsa_decrypt_test_vec(data_t *cipher, int mod,
                                  char *input_P, char *input_Q,
                                  char *input_N, char *input_E,
                                  int padding_mode,
                                  data_t *clear, int ret)
{
    unsigned char output[256];
    mbedtls_test_rnd_pseudo_info rnd_info;
    mbedtls_mpi N, P, Q, E;
    mbedtls_rsa_context *rsa;
    mbedtls_pk_context pk;
    mbedtls_svc_key_id_t key_id = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_attributes_t key_attr = PSA_KEY_ATTRIBUTES_INIT;
    size_t olen;

    mbedtls_pk_init(&pk);
    mbedtls_mpi_init(&N); mbedtls_mpi_init(&P);
    mbedtls_mpi_init(&Q); mbedtls_mpi_init(&E);
    USE_PSA_INIT();

    memset(&rnd_info,  0, sizeof(mbedtls_test_rnd_pseudo_info));

    /* init pk-rsa context */
    TEST_EQUAL(mbedtls_pk_setup(&pk,
                                mbedtls_pk_info_from_type(MBEDTLS_PK_RSA)), 0);
    rsa = mbedtls_pk_rsa(pk);

    /* load public key */
    TEST_EQUAL(mbedtls_test_read_mpi(&N, input_N), 0);
    TEST_EQUAL(mbedtls_test_read_mpi(&E, input_E), 0);

    /* load private key */
    TEST_EQUAL(mbedtls_test_read_mpi(&P, input_P), 0);
    TEST_EQUAL(mbedtls_test_read_mpi(&Q, input_Q), 0);
    TEST_EQUAL(mbedtls_rsa_import(rsa, &N, &P, &Q, NULL, &E), 0);
    TEST_EQUAL(mbedtls_rsa_get_len(rsa), (mod + 7) / 8);
    TEST_EQUAL(mbedtls_rsa_complete(rsa), 0);

    /* Set padding mode */
    if (padding_mode == MBEDTLS_RSA_PKCS_V21) {
        TEST_EQUAL(mbedtls_rsa_set_padding(rsa, padding_mode, MBEDTLS_MD_SHA1), 0);
    }

    /* Turn PK context into an opaque one. */
    TEST_EQUAL(mbedtls_pk_get_psa_attributes(&pk, PSA_KEY_USAGE_DECRYPT, &key_attr), 0);
    TEST_EQUAL(mbedtls_pk_import_into_psa(&pk, &key_attr, &key_id), 0);
    mbedtls_pk_free(&pk);
    mbedtls_pk_init(&pk);
    TEST_EQUAL(mbedtls_pk_setup_opaque(&pk, key_id), 0);

    TEST_EQUAL(mbedtls_pk_get_bitlen(&pk), mod);

    /* decryption test */
    memset(output, 0, sizeof(output));
    olen = 0;
    TEST_EQUAL(mbedtls_pk_decrypt(&pk, cipher->x, cipher->len,
                                  output, &olen, sizeof(output),
                                  mbedtls_test_rnd_pseudo_rand, &rnd_info), ret);
    if (ret == 0) {
        TEST_EQUAL(olen, clear->len);
        TEST_EQUAL(memcmp(output, clear->x, olen), 0);
    }

    TEST_EQUAL(PSA_SUCCESS, psa_destroy_key(key_id));

exit:
    mbedtls_mpi_free(&N); mbedtls_mpi_free(&P);
    mbedtls_mpi_free(&Q); mbedtls_mpi_free(&E);
    mbedtls_pk_free(&pk);
    USE_PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE */
void pk_ec_nocrypt(int type)
{
    mbedtls_pk_context pk;
    unsigned char output[100];
    unsigned char input[100];
    mbedtls_test_rnd_pseudo_info rnd_info;
    size_t olen = 0;
    int ret = MBEDTLS_ERR_PK_TYPE_MISMATCH;

    mbedtls_pk_init(&pk);
    USE_PSA_INIT();

    memset(&rnd_info,  0, sizeof(mbedtls_test_rnd_pseudo_info));
    memset(output,     0, sizeof(output));
    memset(input,      0, sizeof(input));

    TEST_ASSERT(mbedtls_pk_setup(&pk, mbedtls_pk_info_from_type(type)) == 0);

    TEST_ASSERT(mbedtls_pk_encrypt(&pk, input, sizeof(input),
                                   output, &olen, sizeof(output),
                                   mbedtls_test_rnd_pseudo_rand, &rnd_info) == ret);

    TEST_ASSERT(mbedtls_pk_decrypt(&pk, input, sizeof(input),
                                   output, &olen, sizeof(output),
                                   mbedtls_test_rnd_pseudo_rand, &rnd_info) == ret);

exit:
    mbedtls_pk_free(&pk);
    USE_PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE depends_on:MBEDTLS_RSA_C */
void pk_rsa_overflow()
{
    mbedtls_pk_context pk;
    size_t hash_len = UINT_MAX + 1, sig_len = UINT_MAX + 1;
    unsigned char hash[50], sig[100];

    mbedtls_pk_init(&pk);
    USE_PSA_INIT();

    memset(hash, 0x2a, sizeof(hash));
    memset(sig, 0, sizeof(sig));

    TEST_EQUAL(mbedtls_pk_setup(&pk,
                                mbedtls_pk_info_from_type(MBEDTLS_PK_RSA)), 0);

#if defined(MBEDTLS_PKCS1_V21)
    TEST_EQUAL(mbedtls_pk_verify_ext(MBEDTLS_PK_RSASSA_PSS, NULL, &pk,
                                     MBEDTLS_MD_NONE, hash, hash_len, sig, sig_len),
               MBEDTLS_ERR_PK_BAD_INPUT_DATA);
#endif /* MBEDTLS_PKCS1_V21 */

    TEST_EQUAL(mbedtls_pk_verify(&pk, MBEDTLS_MD_NONE, hash, hash_len,
                                 sig, sig_len),
               MBEDTLS_ERR_PK_BAD_INPUT_DATA);

#if defined(MBEDTLS_PKCS1_V21)
    TEST_EQUAL(mbedtls_pk_sign_ext(MBEDTLS_PK_RSASSA_PSS, &pk,
                                   MBEDTLS_MD_NONE, hash, hash_len,
                                   sig, sizeof(sig), &sig_len,
                                   mbedtls_test_rnd_std_rand, NULL),
               MBEDTLS_ERR_PK_BAD_INPUT_DATA);
#endif /* MBEDTLS_PKCS1_V21 */

    TEST_EQUAL(mbedtls_pk_sign(&pk, MBEDTLS_MD_NONE, hash, hash_len,
                               sig, sizeof(sig), &sig_len,
                               mbedtls_test_rnd_std_rand, NULL),
               MBEDTLS_ERR_PK_BAD_INPUT_DATA);

exit:
    mbedtls_pk_free(&pk);
    USE_PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE depends_on:MBEDTLS_RSA_C:MBEDTLS_PK_RSA_ALT_SUPPORT */
void pk_rsa_alt()
{
    /*
     * An rsa_alt context can only do private operations (decrypt, sign).
     * Test it against the public operations (encrypt, verify) of a
     * corresponding rsa context.
     */
    mbedtls_rsa_context raw;
    mbedtls_pk_context rsa, alt;
    mbedtls_pk_debug_item dbg_items[10];
    unsigned char hash[50], sig[RSA_KEY_LEN];
    unsigned char msg[50], ciph[RSA_KEY_LEN], test[50];
    size_t sig_len, ciph_len, test_len;
    int ret = MBEDTLS_ERR_PK_TYPE_MISMATCH;

    mbedtls_rsa_init(&raw);
    mbedtls_pk_init(&rsa);
    mbedtls_pk_init(&alt);
    USE_PSA_INIT();

    memset(hash, 0x2a, sizeof(hash));
    memset(sig, 0, sizeof(sig));
    memset(msg, 0x2a, sizeof(msg));
    memset(ciph, 0, sizeof(ciph));
    memset(test, 0, sizeof(test));

    /* Initialize PK RSA context with random key */
    TEST_ASSERT(mbedtls_pk_setup(&rsa,
                                 mbedtls_pk_info_from_type(MBEDTLS_PK_RSA)) == 0);
    TEST_ASSERT(pk_genkey(&rsa, RSA_KEY_SIZE) == 0);

    /* Extract key to the raw rsa context */
    TEST_ASSERT(mbedtls_rsa_copy(&raw, mbedtls_pk_rsa(rsa)) == 0);

    /* Initialize PK RSA_ALT context */
    TEST_ASSERT(mbedtls_pk_setup_rsa_alt(&alt, (void *) &raw,
                                         mbedtls_rsa_decrypt_func, mbedtls_rsa_sign_func,
                                         mbedtls_rsa_key_len_func) == 0);

    /* Test administrative functions */
    TEST_ASSERT(mbedtls_pk_can_do(&alt, MBEDTLS_PK_RSA));
    TEST_ASSERT(mbedtls_pk_get_bitlen(&alt) == RSA_KEY_SIZE);
    TEST_ASSERT(mbedtls_pk_get_len(&alt) == RSA_KEY_LEN);
    TEST_ASSERT(mbedtls_pk_get_type(&alt) == MBEDTLS_PK_RSA_ALT);
    TEST_ASSERT(strcmp(mbedtls_pk_get_name(&alt), "RSA-alt") == 0);

#if defined(MBEDTLS_PSA_CRYPTO_C)
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
    TEST_EQUAL(mbedtls_pk_get_psa_attributes(&alt,
                                             PSA_KEY_USAGE_ENCRYPT,
                                             &attributes),
               MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE);
    mbedtls_svc_key_id_t key_id = MBEDTLS_SVC_KEY_ID_INIT;
    TEST_EQUAL(mbedtls_pk_import_into_psa(&alt, &attributes, &key_id),
               MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE);
#endif /* MBEDTLS_PSA_CRYPTO_C */

    /* Test signature */
#if SIZE_MAX > UINT_MAX
    TEST_ASSERT(mbedtls_pk_sign(&alt, MBEDTLS_MD_NONE, hash, SIZE_MAX,
                                sig, sizeof(sig), &sig_len,
                                mbedtls_test_rnd_std_rand, NULL)
                == MBEDTLS_ERR_PK_BAD_INPUT_DATA);
#endif /* SIZE_MAX > UINT_MAX */
    TEST_ASSERT(mbedtls_pk_sign(&alt, MBEDTLS_MD_NONE, hash, sizeof(hash),
                                sig, sizeof(sig), &sig_len,
                                mbedtls_test_rnd_std_rand, NULL)
                == 0);
    TEST_ASSERT(sig_len == RSA_KEY_LEN);
    TEST_ASSERT(mbedtls_pk_verify(&rsa, MBEDTLS_MD_NONE,
                                  hash, sizeof(hash), sig, sig_len) == 0);

    /* Test decrypt */
    TEST_ASSERT(mbedtls_pk_encrypt(&rsa, msg, sizeof(msg),
                                   ciph, &ciph_len, sizeof(ciph),
                                   mbedtls_test_rnd_std_rand, NULL) == 0);
    TEST_ASSERT(mbedtls_pk_decrypt(&alt, ciph, ciph_len,
                                   test, &test_len, sizeof(test),
                                   mbedtls_test_rnd_std_rand, NULL) == 0);
    TEST_ASSERT(test_len == sizeof(msg));
    TEST_ASSERT(memcmp(test, msg, test_len) == 0);

    /* Test forbidden operations */
    TEST_ASSERT(mbedtls_pk_encrypt(&alt, msg, sizeof(msg),
                                   ciph, &ciph_len, sizeof(ciph),
                                   mbedtls_test_rnd_std_rand, NULL) == ret);
    TEST_ASSERT(mbedtls_pk_verify(&alt, MBEDTLS_MD_NONE,
                                  hash, sizeof(hash), sig, sig_len) == ret);
    TEST_ASSERT(mbedtls_pk_debug(&alt, dbg_items) == ret);

exit:
    mbedtls_rsa_free(&raw);
    mbedtls_pk_free(&rsa); mbedtls_pk_free(&alt);
    USE_PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE depends_on:MBEDTLS_MD_CAN_SHA256:MBEDTLS_USE_PSA_CRYPTO:MBEDTLS_TEST_PK_PSA_SIGN */
void pk_psa_sign(int psa_type, int bits, int rsa_padding)
{
    mbedtls_pk_context pk;
    unsigned char hash[32];
    unsigned char sig[MBEDTLS_PK_SIGNATURE_MAX_SIZE];
    unsigned char legacy_pub_key[MBEDTLS_PK_WRITE_PUBKEY_MAX_SIZE];
    unsigned char opaque_pub_key[MBEDTLS_PK_WRITE_PUBKEY_MAX_SIZE];
    size_t sig_len, legacy_pub_key_len, opaque_pub_key_len;
    mbedtls_svc_key_id_t key_id = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
#if defined(MBEDTLS_RSA_C) || defined(MBEDTLS_PK_WRITE_C)
    int ret;
#endif /* MBEDTLS_RSA_C || MBEDTLS_PK_WRITE_C */
#if defined(MBEDTLS_PK_CAN_ECDSA_SIGN)
    mbedtls_ecp_group_id ecp_grp_id;
#endif /* MBEDTLS_PK_CAN_ECDSA_SIGN */

    /*
     * Following checks are perfomed:
     * - create an RSA/EC opaque context;
     * - sign with opaque context for both EC and RSA keys;
     * - [EC only] verify with opaque context;
     * - verify that public keys of opaque and non-opaque contexts match;
     * - verify with non-opaque context.
     */

    mbedtls_pk_init(&pk);
    USE_PSA_INIT();

    /* Create the legacy EC/RSA PK context. */
#if defined(MBEDTLS_RSA_C) && defined(MBEDTLS_GENPRIME)
    if (PSA_KEY_TYPE_IS_RSA(psa_type)) {
        TEST_ASSERT(mbedtls_pk_setup(&pk,
                                     mbedtls_pk_info_from_type(MBEDTLS_PK_RSA)) == 0);
        TEST_EQUAL(pk_genkey(&pk, bits), 0);
        TEST_EQUAL(mbedtls_rsa_set_padding(mbedtls_pk_rsa(pk), rsa_padding, MBEDTLS_MD_NONE), 0);
    }
#else /* MBEDTLS_RSA_C && MBEDTLS_GENPRIME */
    (void) rsa_padding;
#endif /* MBEDTLS_RSA_C && MBEDTLS_GENPRIME */
#if defined(MBEDTLS_PK_CAN_ECDSA_SIGN)
    if (PSA_KEY_TYPE_IS_ECC_KEY_PAIR(psa_type)) {
        ecp_grp_id = mbedtls_ecc_group_from_psa(psa_type, bits);
        TEST_ASSERT(mbedtls_pk_setup(&pk, mbedtls_pk_info_from_type(MBEDTLS_PK_ECKEY)) == 0);
        TEST_ASSERT(pk_genkey(&pk, ecp_grp_id) == 0);
    }
#endif /* MBEDTLS_PK_CAN_ECDSA_SIGN */

    /* Export public key from the non-opaque PK context we just created. */
#if defined(MBEDTLS_PK_PARSE_C) && defined(MBEDTLS_PK_WRITE_C)
    ret = mbedtls_pk_write_pubkey_der(&pk, legacy_pub_key, sizeof(legacy_pub_key));
    TEST_ASSERT(ret >= 0);
    legacy_pub_key_len = (size_t) ret;
    /* mbedtls_pk_write_pubkey_der() writes backwards in the data buffer so we
     * shift data back to the beginning of the buffer. */
    memmove(legacy_pub_key,
            legacy_pub_key + sizeof(legacy_pub_key) - legacy_pub_key_len,
            legacy_pub_key_len);
#else /* MBEDTLS_PK_PARSE_C && MBEDTLS_PK_WRITE_C */
#if defined(MBEDTLS_PK_CAN_ECDSA_SIGN)
    if (PSA_KEY_TYPE_IS_ECC_KEY_PAIR(psa_type)) {
        TEST_EQUAL(mbedtls_ecp_point_write_binary(&(mbedtls_pk_ec_ro(pk)->grp),
                                                  &(mbedtls_pk_ec_ro(pk)->Q),
                                                  MBEDTLS_ECP_PF_UNCOMPRESSED,
                                                  &legacy_pub_key_len, legacy_pub_key,
                                                  sizeof(legacy_pub_key)), 0);
    }
#endif /* MBEDTLS_PK_CAN_ECDSA_SIGN */
#if defined(MBEDTLS_RSA_C)
    if (PSA_KEY_TYPE_IS_RSA(psa_type)) {
        unsigned char *end = legacy_pub_key + sizeof(legacy_pub_key);
        ret = mbedtls_rsa_write_pubkey(mbedtls_pk_rsa(pk), legacy_pub_key, &end);
        legacy_pub_key_len = (size_t) ret;
        TEST_ASSERT(legacy_pub_key_len > 0);
        /* mbedtls_rsa_write_pubkey() writes data backward in the buffer so
         * we shift that to the origin of the buffer instead. */
        memmove(legacy_pub_key, end, legacy_pub_key_len);
    }
#endif /* MBEDTLS_RSA_C */
#endif /* MBEDTLS_PK_PARSE_C && MBEDTLS_PK_WRITE_C */

    /* Turn the PK context into an opaque one. */
    TEST_EQUAL(mbedtls_pk_get_psa_attributes(&pk, PSA_KEY_USAGE_SIGN_HASH, &attributes), 0);
    TEST_EQUAL(mbedtls_pk_import_into_psa(&pk, &attributes, &key_id), 0);
    mbedtls_pk_free(&pk);
    mbedtls_pk_init(&pk);
    TEST_EQUAL(mbedtls_pk_setup_opaque(&pk, key_id), 0);

    PSA_ASSERT(psa_get_key_attributes(key_id, &attributes));
    TEST_EQUAL(psa_get_key_type(&attributes), (psa_key_type_t) psa_type);
    TEST_EQUAL(psa_get_key_bits(&attributes), (size_t) bits);
    TEST_EQUAL(psa_get_key_lifetime(&attributes), PSA_KEY_LIFETIME_VOLATILE);

    /* Sign with the opaque context. */
    memset(hash, 0x2a, sizeof(hash));
    memset(sig, 0, sizeof(sig));
    TEST_ASSERT(mbedtls_pk_sign(&pk, MBEDTLS_MD_SHA256,
                                hash, sizeof(hash), sig, sizeof(sig), &sig_len,
                                NULL, NULL) == 0);
    /* Only opaque EC keys support verification. */
    if (PSA_KEY_TYPE_IS_ECC_KEY_PAIR(psa_type)) {
        TEST_ASSERT(mbedtls_pk_verify(&pk, MBEDTLS_MD_SHA256,
                                      hash, sizeof(hash), sig, sig_len) == 0);
    }

    /* Export public key from the opaque PK context. */
#if defined(MBEDTLS_PK_PARSE_C) && defined(MBEDTLS_PK_WRITE_C)
    ret = mbedtls_pk_write_pubkey_der(&pk, opaque_pub_key, sizeof(opaque_pub_key));
    TEST_ASSERT(ret >= 0);
    opaque_pub_key_len = (size_t) ret;
    /* mbedtls_pk_write_pubkey_der() writes backwards in the data buffer. */
    memmove(opaque_pub_key,
            opaque_pub_key + sizeof(opaque_pub_key) - opaque_pub_key_len,
            opaque_pub_key_len);
#else /* MBEDTLS_PK_PARSE_C && MBEDTLS_PK_WRITE_C */
    TEST_EQUAL(psa_export_public_key(key_id, opaque_pub_key, sizeof(opaque_pub_key),
                                     &opaque_pub_key_len), PSA_SUCCESS);
#endif /* MBEDTLS_PK_PARSE_C && MBEDTLS_PK_WRITE_C */

    /* Check that the public keys of opaque and non-opaque PK contexts match. */
    TEST_EQUAL(opaque_pub_key_len, legacy_pub_key_len);
    TEST_MEMORY_COMPARE(opaque_pub_key, opaque_pub_key_len, legacy_pub_key, legacy_pub_key_len);

    /* Destroy the opaque PK context and the wrapped PSA key. */
    mbedtls_pk_free(&pk);
    TEST_ASSERT(PSA_SUCCESS == psa_destroy_key(key_id));

    /* Create a new non-opaque PK context to verify the signature. */
    mbedtls_pk_init(&pk);
#if defined(MBEDTLS_PK_PARSE_C) && defined(MBEDTLS_PK_WRITE_C)
    TEST_EQUAL(mbedtls_pk_parse_public_key(&pk, legacy_pub_key, legacy_pub_key_len), 0);
#else /* MBEDTLS_PK_PARSE_C && MBEDTLS_PK_WRITE_C */
#if defined(MBEDTLS_PK_CAN_ECDSA_SIGN)
    if (PSA_KEY_TYPE_IS_ECC_KEY_PAIR(psa_type)) {
        TEST_EQUAL(mbedtls_pk_setup(&pk, mbedtls_pk_info_from_type(MBEDTLS_PK_ECKEY)), 0);
        TEST_EQUAL(mbedtls_ecp_group_load(&(mbedtls_pk_ec_rw(pk)->grp), ecp_grp_id), 0);
        TEST_EQUAL(mbedtls_ecp_point_read_binary(&(mbedtls_pk_ec_ro(pk)->grp),
                                                 &(mbedtls_pk_ec_rw(pk)->Q),
                                                 legacy_pub_key, legacy_pub_key_len), 0);
    }
#endif /* MBEDTLS_PK_CAN_ECDSA_SIGN */
#if defined(MBEDTLS_RSA_C)
    if (PSA_KEY_TYPE_IS_RSA(psa_type)) {
        TEST_EQUAL(mbedtls_pk_setup(&pk, mbedtls_pk_info_from_type(MBEDTLS_PK_RSA)), 0);
        TEST_EQUAL(mbedtls_rsa_parse_pubkey(mbedtls_pk_rsa(pk), legacy_pub_key,
                                            legacy_pub_key_len), 0);
    }
#endif /* MBEDTLS_RSA_C */
#endif /* MBEDTLS_PK_PARSE_C && MBEDTLS_PK_WRITE_C */

#if defined(MBEDTLS_RSA_C)
    if (PSA_KEY_TYPE_IS_RSA(psa_type)) {
        TEST_EQUAL(mbedtls_rsa_set_padding(mbedtls_pk_rsa(pk), rsa_padding, MBEDTLS_MD_NONE), 0);
    }
#endif /* MBEDTLS_RSA_C */
    TEST_ASSERT(mbedtls_pk_verify(&pk, MBEDTLS_MD_SHA256,
                                  hash, sizeof(hash), sig, sig_len) == 0);

exit:
    psa_reset_key_attributes(&attributes);

    mbedtls_pk_free(&pk);
    USE_PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE depends_on:MBEDTLS_GENPRIME */
void pk_sign_ext(int pk_type, int curve_or_keybits, int key_pk_type, int md_alg)
{
    mbedtls_pk_context pk;
    size_t sig_len;
    unsigned char sig[MBEDTLS_PK_SIGNATURE_MAX_SIZE];
    unsigned char hash[MBEDTLS_MD_MAX_SIZE];
    size_t hash_len = mbedtls_md_get_size_from_type(md_alg);
    void const *options = NULL;
    mbedtls_pk_rsassa_pss_options rsassa_pss_options;
    memset(hash, 0x2a, sizeof(hash));
    memset(sig, 0, sizeof(sig));

    mbedtls_pk_init(&pk);
    MD_OR_USE_PSA_INIT();

    TEST_EQUAL(mbedtls_pk_setup(&pk,
                                mbedtls_pk_info_from_type(pk_type)), 0);
    TEST_EQUAL(pk_genkey(&pk, curve_or_keybits), 0);

    TEST_EQUAL(mbedtls_pk_sign_ext(key_pk_type, &pk, md_alg, hash, hash_len,
                                   sig, sizeof(sig), &sig_len,
                                   mbedtls_test_rnd_std_rand, NULL), 0);

    if (key_pk_type == MBEDTLS_PK_RSASSA_PSS) {
        rsassa_pss_options.mgf1_hash_id = md_alg;
        TEST_ASSERT(hash_len != 0);
        rsassa_pss_options.expected_salt_len = hash_len;
        options = (const void *) &rsassa_pss_options;
    }
    TEST_EQUAL(mbedtls_pk_verify_ext(key_pk_type, options, &pk, md_alg,
                                     hash, hash_len, sig, sig_len), 0);
exit:
    mbedtls_pk_free(&pk);
    MD_OR_USE_PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE depends_on:MBEDTLS_RSA_C:MBEDTLS_GENPRIME:MBEDTLS_USE_PSA_CRYPTO */
void pk_psa_wrap_sign_ext(int pk_type, int key_bits, int key_pk_type, int md_alg)
{
    mbedtls_pk_context pk;
    size_t sig_len, pkey_len;
    mbedtls_svc_key_id_t key_id = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_attributes_t key_attr = PSA_KEY_ATTRIBUTES_INIT;
    unsigned char sig[MBEDTLS_PK_SIGNATURE_MAX_SIZE];
    unsigned char pkey[PSA_EXPORT_PUBLIC_KEY_MAX_SIZE];
    unsigned char *pkey_start;
    unsigned char hash[PSA_HASH_MAX_SIZE];
    psa_algorithm_t psa_md_alg = mbedtls_md_psa_alg_from_type(md_alg);
    size_t hash_len = PSA_HASH_LENGTH(psa_md_alg);
    void const *options = NULL;
    mbedtls_pk_rsassa_pss_options rsassa_pss_options;
    int ret;

    mbedtls_pk_init(&pk);
    PSA_INIT();

    /* Create legacy RSA public/private key in PK context. */
    mbedtls_pk_init(&pk);
    TEST_EQUAL(mbedtls_pk_setup(&pk,
                                mbedtls_pk_info_from_type(pk_type)), 0);
    TEST_EQUAL(mbedtls_rsa_gen_key(mbedtls_pk_rsa(pk),
                                   mbedtls_test_rnd_std_rand, NULL,
                                   key_bits, 3), 0);

    if (key_pk_type == MBEDTLS_PK_RSASSA_PSS) {
        mbedtls_rsa_set_padding(mbedtls_pk_rsa(pk), MBEDTLS_RSA_PKCS_V21, MBEDTLS_MD_NONE);
    }

    /* Export underlying public key for re-importing in a legacy context.
     * Note: mbedtls_rsa_write_key() writes backwards in the data buffer. */
    pkey_start = pkey + sizeof(pkey);
    ret = mbedtls_rsa_write_pubkey(mbedtls_pk_rsa(pk), pkey, &pkey_start);
    TEST_ASSERT(ret >= 0);

    pkey_len = (size_t) ret;
    /* mbedtls_pk_write_pubkey_der() writes backwards in the data buffer. */
    pkey_start = pkey + sizeof(pkey) - pkey_len;

    /* Turn PK context into an opaque one. */
    TEST_EQUAL(mbedtls_pk_get_psa_attributes(&pk, PSA_KEY_USAGE_SIGN_HASH, &key_attr), 0);
    TEST_EQUAL(mbedtls_pk_import_into_psa(&pk, &key_attr, &key_id), 0);
    mbedtls_pk_free(&pk);
    mbedtls_pk_init(&pk);
    TEST_EQUAL(mbedtls_pk_setup_opaque(&pk, key_id), 0);

    memset(hash, 0x2a, sizeof(hash));
    memset(sig, 0, sizeof(sig));

#if defined(MBEDTLS_PKCS1_V21)
    /* Check that trying to use the wrong pk_type in sign_ext() results in a failure.
     * The PSA key was setup to use PKCS1 v1.5 signature algorithm, but here we try
     * to use it for PSS (PKCS1 v2.1) and it should fail. */
    if (key_pk_type == MBEDTLS_PK_RSA) {
        TEST_EQUAL(mbedtls_pk_sign_ext(MBEDTLS_PK_RSASSA_PSS, &pk, md_alg, hash, hash_len,
                                       sig, sizeof(sig), &sig_len,
                                       mbedtls_test_rnd_std_rand, NULL),
                   MBEDTLS_ERR_RSA_BAD_INPUT_DATA);
    }
#endif /* MBEDTLS_PKCS1_V21 */

    /* Perform sign_ext() with the correct pk_type. */
    TEST_EQUAL(mbedtls_pk_sign_ext(key_pk_type, &pk, md_alg, hash, hash_len,
                                   sig, sizeof(sig), &sig_len,
                                   mbedtls_test_rnd_std_rand, NULL), 0);

    /* verify_ext() is not supported when using an opaque context. */
    if (key_pk_type == MBEDTLS_PK_RSASSA_PSS) {
        mbedtls_pk_rsassa_pss_options pss_opts = {
            .mgf1_hash_id = md_alg,
            .expected_salt_len = MBEDTLS_RSA_SALT_LEN_ANY,
        };
        TEST_EQUAL(mbedtls_pk_verify_ext(key_pk_type, &pss_opts, &pk, md_alg,
                                         hash, hash_len, sig, sig_len),
                   MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE);
    } else {
        TEST_EQUAL(mbedtls_pk_verify_ext(key_pk_type, NULL, &pk, md_alg,
                                         hash, hash_len, sig, sig_len),
                   MBEDTLS_ERR_PK_TYPE_MISMATCH);
    }

    mbedtls_pk_free(&pk);
    TEST_EQUAL(PSA_SUCCESS, psa_destroy_key(key_id));

    mbedtls_pk_init(&pk);
    TEST_EQUAL(mbedtls_pk_setup(&pk,
                                mbedtls_pk_info_from_type(pk_type)), 0);
    TEST_EQUAL(mbedtls_rsa_parse_pubkey(mbedtls_pk_rsa(pk), pkey_start, pkey_len), 0);

    if (key_pk_type == MBEDTLS_PK_RSASSA_PSS) {
        rsassa_pss_options.mgf1_hash_id = md_alg;
        TEST_ASSERT(hash_len != 0);
        rsassa_pss_options.expected_salt_len = hash_len;
        options = (const void *) &rsassa_pss_options;
    }
    TEST_EQUAL(mbedtls_pk_verify_ext(key_pk_type, options, &pk, md_alg,
                                     hash, hash_len, sig, sig_len), 0);

exit:
    mbedtls_pk_free(&pk);
    PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE depends_on:MBEDTLS_PSA_CRYPTO_C */
void pk_get_psa_attributes(int pk_type, int from_pair,
                           int usage_arg,
                           int to_pair, int expected_alg)
{
    mbedtls_pk_context pk;
    mbedtls_pk_init(&pk);
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
    psa_key_usage_t usage = usage_arg;
    mbedtls_svc_key_id_t new_key_id = MBEDTLS_SVC_KEY_ID_INIT;

    PSA_INIT();

    psa_key_type_t expected_psa_type = 0;
    TEST_EQUAL(pk_setup_for_type(pk_type, from_pair,
                                 &pk, &expected_psa_type), 0);
    if (!to_pair) {
        expected_psa_type = PSA_KEY_TYPE_PUBLIC_KEY_OF_KEY_PAIR(expected_psa_type);
    }

    psa_key_lifetime_t lifetime = PSA_KEY_LIFETIME_VOLATILE; //TODO: diversity
    mbedtls_svc_key_id_t key_id = MBEDTLS_SVC_KEY_ID_INIT; //TODO: diversity
    psa_set_key_id(&attributes, key_id);
    psa_set_key_lifetime(&attributes, lifetime);
    psa_set_key_enrollment_algorithm(&attributes, 42);
    psa_key_usage_t expected_usage = pk_get_psa_attributes_implied_usage(usage);

#if defined(MBEDTLS_ECDSA_DETERMINISTIC)
    /* When the resulting algorithm is ECDSA, the compile-time configuration
     * can cause it to be either deterministic or randomized ECDSA.
     * Rather than have two near-identical sets of test data depending on
     * the configuration, always use randomized in the test data and
     * tweak the expected result here. */
    if (expected_alg == PSA_ALG_ECDSA(PSA_ALG_ANY_HASH)) {
        expected_alg = PSA_ALG_DETERMINISTIC_ECDSA(PSA_ALG_ANY_HASH);
    }
#endif

    TEST_EQUAL(mbedtls_pk_get_psa_attributes(&pk, usage, &attributes), 0);

    TEST_EQUAL(psa_get_key_lifetime(&attributes), lifetime);
    TEST_ASSERT(mbedtls_svc_key_id_equal(psa_get_key_id(&attributes),
                                         key_id));
    TEST_EQUAL(psa_get_key_type(&attributes), expected_psa_type);
    TEST_EQUAL(psa_get_key_bits(&attributes),
               mbedtls_pk_get_bitlen(&pk));
    TEST_EQUAL(psa_get_key_usage_flags(&attributes), expected_usage);
    TEST_EQUAL(psa_get_key_algorithm(&attributes), expected_alg);
    TEST_EQUAL(psa_get_key_enrollment_algorithm(&attributes), PSA_ALG_NONE);

    TEST_EQUAL(mbedtls_pk_import_into_psa(&pk, &attributes, &new_key_id), 0);
    if (!mbedtls_test_key_consistency_psa_pk(new_key_id, &pk)) {
        goto exit;
    }

exit:
    mbedtls_pk_free(&pk);
    psa_reset_key_attributes(&attributes);
    psa_destroy_key(new_key_id);
    PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE depends_on:MBEDTLS_PSA_CRYPTO_C:MBEDTLS_RSA_C:MBEDTLS_PKCS1_V21:MBEDTLS_GENPRIME */
void pk_rsa_v21_get_psa_attributes(int md_type, int from_pair,
                                   int usage_arg,
                                   int to_pair, int expected_alg)
{
    mbedtls_pk_context pk;
    mbedtls_pk_init(&pk);
    psa_key_usage_t usage = usage_arg;
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
    mbedtls_svc_key_id_t new_key_id = MBEDTLS_SVC_KEY_ID_INIT;

    PSA_INIT();

    psa_key_type_t expected_psa_type = 0;
    TEST_EQUAL(pk_setup_for_type(MBEDTLS_PK_RSA, from_pair,
                                 &pk, &expected_psa_type), 0);
    mbedtls_rsa_context *rsa = mbedtls_pk_rsa(pk);
    TEST_EQUAL(mbedtls_rsa_set_padding(rsa, MBEDTLS_RSA_PKCS_V21, md_type), 0);
    if (!to_pair) {
        expected_psa_type = PSA_KEY_TYPE_PUBLIC_KEY_OF_KEY_PAIR(expected_psa_type);
    }
    psa_key_usage_t expected_usage = pk_get_psa_attributes_implied_usage(usage);

    TEST_EQUAL(mbedtls_pk_get_psa_attributes(&pk, usage, &attributes), 0);

    TEST_EQUAL(psa_get_key_lifetime(&attributes), PSA_KEY_LIFETIME_VOLATILE);
    TEST_ASSERT(mbedtls_svc_key_id_equal(psa_get_key_id(&attributes),
                                         MBEDTLS_SVC_KEY_ID_INIT));
    TEST_EQUAL(psa_get_key_type(&attributes), expected_psa_type);
    TEST_EQUAL(psa_get_key_bits(&attributes),
               mbedtls_pk_get_bitlen(&pk));
    TEST_EQUAL(psa_get_key_usage_flags(&attributes), expected_usage);
    TEST_EQUAL(psa_get_key_algorithm(&attributes), expected_alg);
    TEST_EQUAL(psa_get_key_enrollment_algorithm(&attributes), PSA_ALG_NONE);

    TEST_EQUAL(mbedtls_pk_import_into_psa(&pk, &attributes, &new_key_id), 0);
    if (!mbedtls_test_key_consistency_psa_pk(new_key_id, &pk)) {
        goto exit;
    }

exit:
    mbedtls_pk_free(&pk);
    psa_reset_key_attributes(&attributes);
    psa_destroy_key(new_key_id);
    PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE depends_on:MBEDTLS_PSA_CRYPTO_C */
void pk_get_psa_attributes_fail(int pk_type, int from_pair,
                                int usage_arg,
                                int expected_ret)
{
    mbedtls_pk_context pk;
    mbedtls_pk_init(&pk);
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
    psa_key_usage_t usage = usage_arg;

    PSA_INIT();

    psa_key_type_t expected_psa_type;
    TEST_EQUAL(pk_setup_for_type(pk_type, from_pair,
                                 &pk, &expected_psa_type), 0);

    TEST_EQUAL(mbedtls_pk_get_psa_attributes(&pk, usage, &attributes),
               expected_ret);

exit:
    mbedtls_pk_free(&pk);
    psa_reset_key_attributes(&attributes);
    PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE depends_on:MBEDTLS_PSA_CRYPTO_C:PSA_WANT_KEY_TYPE_ECC_KEY_PAIR_GENERATE:MBEDTLS_TEST_PSA_ECC_AT_LEAST_ONE_CURVE:MBEDTLS_PSA_CRYPTO_STORAGE_C */
void pk_import_into_psa_lifetime(int from_opaque,
                                 int from_persistent, /* when from opaque */
                                 int from_exportable, /* when from opaque */
                                 int to_public,
                                 int to_persistent)
{
    mbedtls_pk_context pk;
    mbedtls_pk_init(&pk);
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
    mbedtls_svc_key_id_t old_key_id = MBEDTLS_SVC_KEY_ID_INIT;
    mbedtls_svc_key_id_t new_key_id = MBEDTLS_SVC_KEY_ID_INIT;
    mbedtls_svc_key_id_t expected_key_id = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_lifetime_t expected_lifetime = PSA_KEY_LIFETIME_VOLATILE;

    PSA_INIT();

    if (from_opaque) {
#if defined(MBEDTLS_USE_PSA_CRYPTO)
        psa_key_type_t from_psa_type =
            PSA_KEY_TYPE_ECC_KEY_PAIR(MBEDTLS_TEST_PSA_ECC_ONE_FAMILY);
        psa_set_key_type(&attributes, from_psa_type);
        psa_set_key_bits(&attributes, MBEDTLS_TEST_PSA_ECC_ONE_CURVE_BITS);
        psa_set_key_usage_flags(
            &attributes,
            (from_exportable ? PSA_KEY_USAGE_EXPORT : PSA_KEY_USAGE_COPY) |
            PSA_KEY_USAGE_SIGN_HASH | PSA_KEY_USAGE_VERIFY_HASH);
        psa_set_key_algorithm(&attributes, PSA_ALG_ECDH);
        if (from_persistent) {
            psa_set_key_id(&attributes, mbedtls_svc_key_id_make(0, 1));
        }
        PSA_ASSERT(psa_generate_key(&attributes, &old_key_id));
        TEST_EQUAL(mbedtls_pk_setup_opaque(&pk, old_key_id), 0);
        psa_reset_key_attributes(&attributes);
#else
        (void) from_persistent;
        (void) from_exportable;
        TEST_FAIL("Attempted to test opaque key without opaque key support");
#endif
    } else {
        psa_key_type_t psa_type_according_to_setup;
        TEST_EQUAL(pk_setup_for_type(MBEDTLS_PK_ECKEY, 1,
                                     &pk, &psa_type_according_to_setup), 0);
    }

    if (to_persistent) {
        expected_key_id = mbedtls_svc_key_id_make(42, 2);
        psa_set_key_id(&attributes, expected_key_id);
        /* psa_set_key_id() sets the lifetime to PERSISTENT */
        expected_lifetime = PSA_KEY_LIFETIME_PERSISTENT;
    }

    psa_key_usage_t to_usage =
        to_public ? PSA_KEY_USAGE_VERIFY_HASH : PSA_KEY_USAGE_SIGN_HASH;
    TEST_EQUAL(mbedtls_pk_get_psa_attributes(&pk, to_usage,
                                             &attributes), 0);
    /* mbedtls_pk_get_psa_attributes() is specified to not modify
     * the persistence attributes. */
    TEST_EQUAL(psa_get_key_lifetime(&attributes), expected_lifetime);
    TEST_EQUAL(MBEDTLS_SVC_KEY_ID_GET_KEY_ID(psa_get_key_id(&attributes)),
               MBEDTLS_SVC_KEY_ID_GET_KEY_ID(expected_key_id));

    TEST_EQUAL(mbedtls_pk_import_into_psa(&pk, &attributes, &new_key_id), 0);
    if (!mbedtls_test_key_consistency_psa_pk(new_key_id, &pk)) {
        goto exit;
    }

    PSA_ASSERT(psa_get_key_attributes(new_key_id, &attributes));
    TEST_EQUAL(psa_get_key_lifetime(&attributes), expected_lifetime);
    /* Here expected_key_id=0 for a volatile key, but we expect
     * attributes to contain a dynamically assigned key id which we
     * can't predict. */
    if (to_persistent) {
        TEST_ASSERT(mbedtls_svc_key_id_equal(psa_get_key_id(&attributes),
                                             expected_key_id));
    }

exit:
    mbedtls_pk_free(&pk);
    psa_reset_key_attributes(&attributes);
    psa_destroy_key(old_key_id);
    psa_destroy_key(new_key_id);
    PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE depends_on:MBEDTLS_USE_PSA_CRYPTO */
void pk_get_psa_attributes_opaque(int from_type_arg, int from_bits_arg,
                                  int from_usage_arg, int from_alg_arg,
                                  int usage_arg,
                                  int expected_ret,
                                  int to_pair, int expected_usage_arg)
{
    mbedtls_pk_context pk;
    mbedtls_pk_init(&pk);
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
    mbedtls_svc_key_id_t old_key_id = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_type_t from_type = from_type_arg;
    size_t bits = from_bits_arg;
    psa_key_usage_t from_usage = from_usage_arg;
    psa_algorithm_t alg = from_alg_arg;
    psa_key_usage_t usage = usage_arg;
    psa_key_usage_t expected_usage = expected_usage_arg;
    mbedtls_svc_key_id_t new_key_id = MBEDTLS_SVC_KEY_ID_INIT;

    PSA_INIT();

    psa_set_key_type(&attributes, from_type);
    psa_set_key_bits(&attributes, bits);
    psa_set_key_usage_flags(&attributes, from_usage);
    psa_set_key_algorithm(&attributes, alg);
    psa_set_key_enrollment_algorithm(&attributes, 42);
    PSA_ASSERT(psa_generate_key(&attributes, &old_key_id));
    TEST_EQUAL(mbedtls_pk_setup_opaque(&pk, old_key_id), 0);

    psa_key_type_t expected_psa_type =
        to_pair ? from_type : PSA_KEY_TYPE_PUBLIC_KEY_OF_KEY_PAIR(from_type);

    TEST_EQUAL(mbedtls_pk_get_psa_attributes(&pk, usage, &attributes),
               expected_ret);

    if (expected_ret == 0) {
        TEST_EQUAL(psa_get_key_lifetime(&attributes), PSA_KEY_LIFETIME_VOLATILE);
        TEST_ASSERT(mbedtls_svc_key_id_equal(psa_get_key_id(&attributes),
                                             MBEDTLS_SVC_KEY_ID_INIT));
        TEST_EQUAL(psa_get_key_type(&attributes), expected_psa_type);
        TEST_EQUAL(psa_get_key_bits(&attributes), bits);
        TEST_EQUAL(psa_get_key_usage_flags(&attributes), expected_usage);
        TEST_EQUAL(psa_get_key_algorithm(&attributes), alg);
        TEST_EQUAL(psa_get_key_enrollment_algorithm(&attributes), PSA_ALG_NONE);

        int expected_import_ret = 0;
        if (to_pair &&
            !(from_usage & (PSA_KEY_USAGE_COPY | PSA_KEY_USAGE_EXPORT))) {
            expected_import_ret = MBEDTLS_ERR_PK_TYPE_MISMATCH;
        }
        TEST_EQUAL(mbedtls_pk_import_into_psa(&pk, &attributes, &new_key_id),
                   expected_import_ret);
        if (expected_import_ret == 0) {
            if (!mbedtls_test_key_consistency_psa_pk(new_key_id, &pk)) {
                goto exit;
            }
        }
    }

exit:
    mbedtls_pk_free(&pk);
    psa_destroy_key(old_key_id);
    psa_destroy_key(new_key_id);
    psa_reset_key_attributes(&attributes);
    PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE depends_on:MBEDTLS_PSA_CRYPTO_C */
void pk_import_into_psa_fail(int pk_type, int from_pair,
                             int type_arg, int bits_arg,
                             int expected_ret)
{
    mbedtls_pk_context pk;
    mbedtls_pk_init(&pk);
    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
    psa_key_type_t type = type_arg;
    size_t bits = bits_arg;
    mbedtls_svc_key_id_t key_id = mbedtls_svc_key_id_make(0, 42);

    PSA_INIT();

    psa_key_type_t expected_psa_type;
    TEST_EQUAL(pk_setup_for_type(pk_type, from_pair,
                                 &pk, &expected_psa_type), 0);

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

    TEST_EQUAL(mbedtls_pk_import_into_psa(&pk, &attributes, &key_id),
               expected_ret);
    TEST_ASSERT(mbedtls_svc_key_id_equal(key_id, MBEDTLS_SVC_KEY_ID_INIT));

exit:
    psa_destroy_key(key_id);
    mbedtls_pk_free(&pk);
    psa_reset_key_attributes(&attributes);
    PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE depends_on:MBEDTLS_USE_PSA_CRYPTO */
void pk_import_into_psa_opaque(int from_type, int from_bits,
                               int from_usage, int from_alg,
                               int to_type, int to_bits,
                               int to_usage, int to_alg,
                               int expected_ret)
{
    mbedtls_pk_context pk;
    mbedtls_pk_init(&pk);
    psa_key_attributes_t from_attributes = PSA_KEY_ATTRIBUTES_INIT;
    mbedtls_svc_key_id_t from_key_id = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_attributes_t to_attributes = PSA_KEY_ATTRIBUTES_INIT;
    mbedtls_svc_key_id_t to_key_id = MBEDTLS_SVC_KEY_ID_INIT;
    psa_key_attributes_t actual_attributes = PSA_KEY_ATTRIBUTES_INIT;

    PSA_INIT();

    psa_set_key_type(&from_attributes, from_type);
    psa_set_key_bits(&from_attributes, from_bits);
    psa_set_key_usage_flags(&from_attributes, from_usage);
    psa_set_key_algorithm(&from_attributes, from_alg);
    PSA_ASSERT(psa_generate_key(&from_attributes, &from_key_id));
    TEST_EQUAL(mbedtls_pk_setup_opaque(&pk, from_key_id), 0);

    psa_set_key_type(&to_attributes, to_type);
    psa_set_key_bits(&to_attributes, to_bits);
    psa_set_key_usage_flags(&to_attributes, to_usage);
    psa_set_key_algorithm(&to_attributes, to_alg);

    TEST_EQUAL(mbedtls_pk_import_into_psa(&pk, &to_attributes, &to_key_id),
               expected_ret);

    if (expected_ret == 0) {
        PSA_ASSERT(psa_get_key_attributes(to_key_id, &actual_attributes));
        TEST_EQUAL(to_type, psa_get_key_type(&actual_attributes));
        if (to_bits != 0) {
            TEST_EQUAL(to_bits, psa_get_key_bits(&actual_attributes));
        }
        TEST_EQUAL(to_alg, psa_get_key_algorithm(&actual_attributes));
        psa_key_usage_t expected_usage = to_usage;
        if (expected_usage & PSA_KEY_USAGE_SIGN_HASH) {
            expected_usage |= PSA_KEY_USAGE_SIGN_MESSAGE;
        }
        if (expected_usage & PSA_KEY_USAGE_VERIFY_HASH) {
            expected_usage |= PSA_KEY_USAGE_VERIFY_MESSAGE;
        }
        TEST_EQUAL(expected_usage, psa_get_key_usage_flags(&actual_attributes));
        if (!mbedtls_test_key_consistency_psa_pk(to_key_id, &pk)) {
            goto exit;
        }
    } else {
        TEST_ASSERT(mbedtls_svc_key_id_equal(to_key_id, MBEDTLS_SVC_KEY_ID_INIT));
    }

exit:
    mbedtls_pk_free(&pk);
    psa_destroy_key(from_key_id);
    psa_destroy_key(to_key_id);
    psa_reset_key_attributes(&from_attributes);
    psa_reset_key_attributes(&to_attributes);
    psa_reset_key_attributes(&actual_attributes);
    PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE depends_on:MBEDTLS_PSA_CRYPTO_C*/
void pk_copy_from_psa_fail(void)
{
    mbedtls_pk_context pk_ctx;
    mbedtls_svc_key_id_t key_id = MBEDTLS_SVC_KEY_ID_INIT;

    mbedtls_pk_init(&pk_ctx);
    PSA_INIT();

    /* Null pk pointer. */
    TEST_EQUAL(mbedtls_pk_copy_from_psa(key_id, NULL),
               MBEDTLS_ERR_PK_BAD_INPUT_DATA);
    TEST_EQUAL(mbedtls_pk_copy_public_from_psa(key_id, NULL),
               MBEDTLS_ERR_PK_BAD_INPUT_DATA);

    /* Invalid key ID. */
    TEST_EQUAL(mbedtls_pk_copy_from_psa(mbedtls_svc_key_id_make(0, 0), &pk_ctx),
               MBEDTLS_ERR_PK_BAD_INPUT_DATA);
    TEST_EQUAL(mbedtls_pk_copy_public_from_psa(mbedtls_svc_key_id_make(0, 0), &pk_ctx),
               MBEDTLS_ERR_PK_BAD_INPUT_DATA);

#if defined(PSA_WANT_KEY_TYPE_DH_KEY_PAIR_GENERATE)
    /* Generate a key type that is not handled by the PK module. */
    PSA_ASSERT(pk_psa_genkey_generic(PSA_KEY_TYPE_DH_KEY_PAIR(PSA_DH_FAMILY_RFC7919), 2048,
                                     PSA_KEY_USAGE_EXPORT, PSA_ALG_NONE, &key_id));
    TEST_EQUAL(mbedtls_pk_copy_from_psa(key_id, &pk_ctx), MBEDTLS_ERR_PK_BAD_INPUT_DATA);
    TEST_EQUAL(mbedtls_pk_copy_public_from_psa(key_id, &pk_ctx), MBEDTLS_ERR_PK_BAD_INPUT_DATA);
    psa_destroy_key(key_id);
#endif /* PSA_WANT_KEY_TYPE_DH_KEY_PAIR_GENERATE */

#if defined(MBEDTLS_PK_HAVE_ECC_KEYS) && defined(PSA_WANT_ECC_SECP_R1_256) && \
    defined(PSA_WANT_KEY_TYPE_ECC_KEY_PAIR_GENERATE)
    /* Generate an EC key which cannot be exported. */
    PSA_ASSERT(pk_psa_genkey_generic(PSA_KEY_TYPE_ECC_KEY_PAIR(PSA_ECC_FAMILY_SECP_R1), 256,
                                     0, PSA_ALG_NONE, &key_id));
    TEST_EQUAL(mbedtls_pk_copy_from_psa(key_id, &pk_ctx), MBEDTLS_ERR_PK_TYPE_MISMATCH);
    psa_destroy_key(key_id);
#endif /* MBEDTLS_PK_HAVE_ECC_KEYS && PSA_WANT_ECC_SECP_R1_256 &&
          PSA_WANT_KEY_TYPE_ECC_KEY_PAIR_GENERATE */

exit:
    mbedtls_pk_free(&pk_ctx);
    psa_destroy_key(key_id);
    PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE depends_on:MBEDTLS_PSA_CRYPTO_C:MBEDTLS_PSA_ACCEL_ALG_RSA_PKCS1V15_SIGN:MBEDTLS_PSA_ACCEL_KEY_TYPE_RSA_KEY_PAIR_BASIC:!MBEDTLS_RSA_C */
void pk_copy_from_psa_builtin_fail()
{
    mbedtls_pk_context pk_ctx;
    mbedtls_svc_key_id_t key_id = MBEDTLS_SVC_KEY_ID_INIT;

    mbedtls_pk_init(&pk_ctx);
    PSA_INIT();

    PSA_ASSERT(pk_psa_genkey_generic(PSA_KEY_TYPE_RSA_KEY_PAIR,
                                     PSA_VENDOR_RSA_GENERATE_MIN_KEY_BITS,
                                     PSA_KEY_USAGE_SIGN_HASH | PSA_KEY_USAGE_EXPORT,
                                     PSA_ALG_RSA_PKCS1V15_SIGN(PSA_ALG_SHA_256),
                                     &key_id));
    TEST_EQUAL(mbedtls_pk_copy_from_psa(key_id, &pk_ctx), MBEDTLS_ERR_PK_BAD_INPUT_DATA);
exit:
    mbedtls_pk_free(&pk_ctx);
    psa_destroy_key(key_id);
    PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE depends_on:MBEDTLS_PSA_CRYPTO_C*/
void pk_copy_from_psa_success(data_t *priv_key_data, int key_type_arg,
                              int key_alg_arg)
{
    psa_key_type_t key_type = key_type_arg;
    psa_algorithm_t key_alg = key_alg_arg;
    psa_key_usage_t key_usage = PSA_KEY_USAGE_SIGN_HASH | PSA_KEY_USAGE_VERIFY_HASH |
                                PSA_KEY_USAGE_EXPORT | PSA_KEY_USAGE_COPY;
    mbedtls_pk_context pk_priv, pk_priv_copy_public, pk_pub, pk_pub_copy_public;
    mbedtls_svc_key_id_t priv_key_id = MBEDTLS_SVC_KEY_ID_INIT;
    mbedtls_svc_key_id_t pub_key_id = MBEDTLS_SVC_KEY_ID_INIT;

    mbedtls_pk_init(&pk_priv);
    mbedtls_pk_init(&pk_priv_copy_public);
    mbedtls_pk_init(&pk_pub);
    mbedtls_pk_init(&pk_pub_copy_public);
    PSA_INIT();

    if (key_type == PSA_KEY_TYPE_RSA_KEY_PAIR) {
        key_usage |= PSA_KEY_USAGE_ENCRYPT | PSA_KEY_USAGE_DECRYPT;
    }

    /* Create both a private key and its public counterpart in PSA. */
    PSA_ASSERT(pk_psa_import_key(priv_key_data->x, priv_key_data->len,
                                 key_type, key_usage, key_alg, &priv_key_id));
    pub_key_id = psa_pub_key_from_priv(priv_key_id);

    /* Create 4 PK contexts starting from the PSA keys we just created. */
    TEST_EQUAL(mbedtls_pk_copy_from_psa(priv_key_id, &pk_priv), 0);
    TEST_EQUAL(mbedtls_pk_copy_public_from_psa(priv_key_id, &pk_priv_copy_public), 0);
    TEST_EQUAL(mbedtls_pk_copy_from_psa(pub_key_id, &pk_pub), 0);
    TEST_EQUAL(mbedtls_pk_copy_public_from_psa(pub_key_id, &pk_pub_copy_public), 0);

    /* Destroy both PSA keys to prove that generated PK contexts are independent
     * from them. */
    priv_key_id = psa_copy_and_destroy(priv_key_id);
    pub_key_id = psa_copy_and_destroy(pub_key_id);

    /* - Check that the generated PK contexts are of the correct type.
     * - [Only for RSA] check that the padding mode is correct.
     */
    if (PSA_KEY_TYPE_IS_ECC_KEY_PAIR(key_type)) {
        TEST_EQUAL(mbedtls_pk_get_type(&pk_priv), MBEDTLS_PK_ECKEY);
        TEST_EQUAL(mbedtls_pk_get_type(&pk_pub), MBEDTLS_PK_ECKEY);
    } else {
        TEST_EQUAL(mbedtls_pk_get_type(&pk_priv), MBEDTLS_PK_RSA);
        TEST_EQUAL(mbedtls_pk_get_type(&pk_pub), MBEDTLS_PK_RSA);
#if defined(MBEDTLS_RSA_C)
        mbedtls_rsa_context *rsa_priv = mbedtls_pk_rsa(pk_priv);
        mbedtls_rsa_context *rsa_pub = mbedtls_pk_rsa(pk_pub);
        if (PSA_ALG_IS_RSA_OAEP(key_alg) || PSA_ALG_IS_RSA_PSS(key_alg)) {
            TEST_EQUAL(mbedtls_rsa_get_padding_mode(rsa_priv), MBEDTLS_RSA_PKCS_V21);
            TEST_EQUAL(mbedtls_rsa_get_padding_mode(rsa_pub), MBEDTLS_RSA_PKCS_V21);
        } else {
            TEST_EQUAL(mbedtls_rsa_get_padding_mode(rsa_priv), MBEDTLS_RSA_PKCS_V15);
            TEST_EQUAL(mbedtls_rsa_get_padding_mode(rsa_pub), MBEDTLS_RSA_PKCS_V15);
        }
#endif /* MBEDTLS_RSA_C */
    }

    /* Check that generated private/public PK contexts form a valid private/public key pair. */
    TEST_EQUAL(mbedtls_pk_check_pair(&pk_pub, &pk_priv, mbedtls_test_rnd_std_rand, NULL), 0);

    /* Check consistency between copied PSA keys and generated PK contexts. */
    TEST_EQUAL(mbedtls_test_key_consistency_psa_pk(priv_key_id, &pk_priv), 1);
    TEST_EQUAL(mbedtls_test_key_consistency_psa_pk(priv_key_id, &pk_pub), 1);
    TEST_EQUAL(mbedtls_test_key_consistency_psa_pk(pub_key_id, &pk_priv), 1);
    TEST_EQUAL(mbedtls_test_key_consistency_psa_pk(pub_key_id, &pk_pub), 1);

    /* Test that the keys from mbedtls_pk_copy_public_from_psa() are identical
     * to the public keys from mbedtls_pk_copy_from_psa(). */
    mbedtls_test_set_step(1);
    TEST_ASSERT(pk_public_same(&pk_pub, &pk_priv_copy_public));
    mbedtls_test_set_step(2);
    TEST_ASSERT(pk_public_same(&pk_pub, &pk_pub_copy_public));

exit:
    mbedtls_pk_free(&pk_priv);
    mbedtls_pk_free(&pk_priv_copy_public);
    mbedtls_pk_free(&pk_pub);
    mbedtls_pk_free(&pk_pub_copy_public);
    psa_destroy_key(priv_key_id);
    psa_destroy_key(pub_key_id);
    PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE depends_on:MBEDTLS_PSA_CRYPTO_C*/
void pk_copy_public_from_psa(data_t *priv_key_data, int key_type_arg)
{
    psa_key_type_t key_type = key_type_arg;
    mbedtls_pk_context pk_from_exportable;
    mbedtls_pk_init(&pk_from_exportable);
    mbedtls_pk_context pk_from_non_exportable;
    mbedtls_pk_init(&pk_from_non_exportable);
    mbedtls_pk_context pk_private;
    mbedtls_pk_init(&pk_private);
    mbedtls_svc_key_id_t non_exportable_key_id = MBEDTLS_SVC_KEY_ID_INIT;
    mbedtls_svc_key_id_t exportable_key_id = MBEDTLS_SVC_KEY_ID_INIT;

    PSA_INIT();

    PSA_ASSERT(pk_psa_import_key(priv_key_data->x, priv_key_data->len,
                                 key_type,
                                 PSA_KEY_USAGE_EXPORT,
                                 PSA_ALG_NONE,
                                 &exportable_key_id));
    PSA_ASSERT(pk_psa_import_key(priv_key_data->x, priv_key_data->len,
                                 key_type,
                                 0,
                                 PSA_ALG_NONE,
                                 &non_exportable_key_id));

    TEST_EQUAL(mbedtls_pk_copy_public_from_psa(exportable_key_id,
                                               &pk_from_exportable), 0);
    TEST_EQUAL(mbedtls_pk_copy_public_from_psa(non_exportable_key_id,
                                               &pk_from_non_exportable), 0);

    /* Check that the non-exportable key really is non-exportable */
    TEST_EQUAL(mbedtls_pk_copy_from_psa(non_exportable_key_id, &pk_private),
               MBEDTLS_ERR_PK_TYPE_MISMATCH);

    psa_destroy_key(exportable_key_id);
    psa_destroy_key(non_exportable_key_id);

    /* The goal of this test function is mostly to check that
     * mbedtls_pk_copy_public_from_psa works with a non-exportable key pair.
     * We check that the resulting key is the same as for an exportable
     * key pair. We rely on pk_copy_from_psa_success tests to validate that
     * the result is correct. */
    TEST_ASSERT(pk_public_same(&pk_from_non_exportable, &pk_from_exportable));

exit:
    mbedtls_pk_free(&pk_from_non_exportable);
    mbedtls_pk_free(&pk_from_exportable);
    mbedtls_pk_free(&pk_private);
    psa_destroy_key(exportable_key_id);
    psa_destroy_key(non_exportable_key_id);
    PSA_DONE();
}
/* END_CASE */