tests/suites/test_suite_rsa.function

/* BEGIN_HEADER */
#include "mbedtls/rsa.h"
#include "rsa_alt_helpers.h"
#include "mbedtls/md5.h"
#include "mbedtls/sha1.h"
#include "mbedtls/sha256.h"
#include "mbedtls/sha512.h"
#include "mbedtls/entropy.h"
#include "mbedtls/ctr_drbg.h"

/* END_HEADER */

/* BEGIN_DEPENDENCIES
 * depends_on:MBEDTLS_RSA_C:MBEDTLS_BIGNUM_C:MBEDTLS_GENPRIME
 * END_DEPENDENCIES
 */

/* BEGIN_CASE */
void rsa_invalid_param()
{
    mbedtls_rsa_context ctx;
    const int invalid_padding = 42;
    const int invalid_hash_id = 0xff;

    mbedtls_rsa_init(&ctx);

    TEST_EQUAL(mbedtls_rsa_set_padding(&ctx, invalid_padding, MBEDTLS_MD_NONE),
               MBEDTLS_ERR_RSA_INVALID_PADDING);

    TEST_EQUAL(mbedtls_rsa_set_padding(&ctx, MBEDTLS_RSA_PKCS_V21,
                                       invalid_hash_id),
               MBEDTLS_ERR_RSA_INVALID_PADDING);

#if !defined(MBEDTLS_PKCS1_V15)
    TEST_EQUAL(mbedtls_rsa_set_padding(&ctx, MBEDTLS_RSA_PKCS_V15,
                                       MBEDTLS_MD_NONE),
               MBEDTLS_ERR_RSA_INVALID_PADDING);
#endif

#if !defined(MBEDTLS_PKCS1_V21)
    TEST_EQUAL(mbedtls_rsa_set_padding(&ctx, MBEDTLS_RSA_PKCS_V21,
                                       MBEDTLS_MD_NONE),
               MBEDTLS_ERR_RSA_INVALID_PADDING);
#endif

exit:
    mbedtls_rsa_free(&ctx);
}
/* END_CASE */

/* BEGIN_CASE */
void rsa_init_free(int reinit)
{
    mbedtls_rsa_context ctx;

    /* Double free is not explicitly documented to work, but we rely on it
     * even inside the library so that you can call mbedtls_rsa_free()
     * unconditionally on an error path without checking whether it has
     * already been called in the success path. */

    mbedtls_rsa_init(&ctx);
    mbedtls_rsa_free(&ctx);

    if (reinit)
        mbedtls_rsa_init(&ctx);
    mbedtls_rsa_free(&ctx);

    /* This test case always succeeds, functionally speaking. A plausible
     * bug might trigger an invalid pointer dereference or a memory leak. */
    goto exit;
}
/* END_CASE */

/* BEGIN_CASE */
void mbedtls_rsa_pkcs1_sign(data_t *message_str,
                            int padding_mode,
                            int digest,
                            int mod,
                            int radix_P,
                            char *input_P,
                            int radix_Q,
                            char *input_Q,
                            int radix_N,
                            char *input_N,
                            int radix_E,
                            char *input_E,
                            data_t *result_str,
                            int result)
{
    unsigned char hash_result[MBEDTLS_MD_MAX_SIZE];
    const mbedtls_md_info_t *md_info = mbedtls_md_info_from_type(digest);
    unsigned char output[256];
    mbedtls_rsa_context ctx;
    mbedtls_mpi N, P, Q, E;
    mbedtls_test_rnd_pseudo_info rnd_info;

    mbedtls_mpi_init(&N);
    mbedtls_mpi_init(&P);
    mbedtls_mpi_init(&Q);
    mbedtls_mpi_init(&E);
    mbedtls_rsa_init(&ctx);
    TEST_ASSERT(mbedtls_rsa_set_padding(&ctx, padding_mode, MBEDTLS_MD_NONE) ==
                0);

    memset(hash_result, 0x00, sizeof(hash_result));
    memset(output, 0x00, sizeof(output));
    memset(&rnd_info, 0, sizeof(mbedtls_test_rnd_pseudo_info));

    TEST_ASSERT(mbedtls_test_read_mpi(&P, radix_P, input_P) == 0);
    TEST_ASSERT(mbedtls_test_read_mpi(&Q, radix_Q, input_Q) == 0);
    TEST_ASSERT(mbedtls_test_read_mpi(&N, radix_N, input_N) == 0);
    TEST_ASSERT(mbedtls_test_read_mpi(&E, radix_E, input_E) == 0);

    TEST_ASSERT(mbedtls_rsa_import(&ctx, &N, &P, &Q, NULL, &E) == 0);
    TEST_ASSERT(mbedtls_rsa_get_len(&ctx) == (size_t)(mod / 8));
    TEST_ASSERT(mbedtls_rsa_complete(&ctx) == 0);
    TEST_ASSERT(mbedtls_rsa_check_privkey(&ctx) == 0);

    if (md_info != NULL)
        TEST_ASSERT(mbedtls_md(md_info, message_str->x, message_str->len,
                               hash_result) == 0);

    TEST_ASSERT(mbedtls_rsa_pkcs1_sign(&ctx, &mbedtls_test_rnd_pseudo_rand,
                                       &rnd_info, digest,
                                       mbedtls_md_get_size(md_info),
                                       hash_result, output) == result);
    if (result == 0) {
        TEST_ASSERT(mbedtls_test_hexcmp(output, result_str->x, ctx.len,
                                        result_str->len) == 0);
    }

exit:
    mbedtls_mpi_free(&N);
    mbedtls_mpi_free(&P);
    mbedtls_mpi_free(&Q);
    mbedtls_mpi_free(&E);
    mbedtls_rsa_free(&ctx);
}
/* END_CASE */

/* BEGIN_CASE */
void mbedtls_rsa_pkcs1_verify(data_t *message_str,
                              int padding_mode,
                              int digest,
                              int mod,
                              int radix_N,
                              char *input_N,
                              int radix_E,
                              char *input_E,
                              data_t *result_str,
                              int result)
{
    unsigned char hash_result[MBEDTLS_MD_MAX_SIZE];
    const mbedtls_md_info_t *md_info = mbedtls_md_info_from_type(digest);
    mbedtls_rsa_context ctx;
    mbedtls_mpi N, E;

    mbedtls_mpi_init(&N);
    mbedtls_mpi_init(&E);
    mbedtls_rsa_init(&ctx);
    TEST_ASSERT(mbedtls_rsa_set_padding(&ctx, padding_mode, MBEDTLS_MD_NONE) ==
                0);
    memset(hash_result, 0x00, sizeof(hash_result));

    TEST_ASSERT(mbedtls_test_read_mpi(&N, radix_N, input_N) == 0);
    TEST_ASSERT(mbedtls_test_read_mpi(&E, radix_E, input_E) == 0);
    TEST_ASSERT(mbedtls_rsa_import(&ctx, &N, NULL, NULL, NULL, &E) == 0);
    TEST_ASSERT(mbedtls_rsa_get_len(&ctx) == (size_t)(mod / 8));
    TEST_ASSERT(mbedtls_rsa_check_pubkey(&ctx) == 0);

    if (md_info != NULL)
        TEST_ASSERT(mbedtls_md(md_info, message_str->x, message_str->len,
                               hash_result) == 0);

    TEST_ASSERT(mbedtls_rsa_pkcs1_verify(&ctx, digest,
                                         mbedtls_md_get_size(md_info),
                                         hash_result, result_str->x) == result);

exit:
    mbedtls_mpi_free(&N);
    mbedtls_mpi_free(&E);
    mbedtls_rsa_free(&ctx);
}
/* END_CASE */

/* BEGIN_CASE */
void rsa_pkcs1_sign_raw(data_t *hash_result,
                        int padding_mode,
                        int mod,
                        int radix_P,
                        char *input_P,
                        int radix_Q,
                        char *input_Q,
                        int radix_N,
                        char *input_N,
                        int radix_E,
                        char *input_E,
                        data_t *result_str)
{
    unsigned char output[256];
    mbedtls_rsa_context ctx;
    mbedtls_mpi N, P, Q, E;
    mbedtls_test_rnd_pseudo_info rnd_info;

    mbedtls_rsa_init(&ctx);
    mbedtls_mpi_init(&N);
    mbedtls_mpi_init(&P);
    mbedtls_mpi_init(&Q);
    mbedtls_mpi_init(&E);

    TEST_ASSERT(mbedtls_rsa_set_padding(&ctx, padding_mode, MBEDTLS_MD_NONE) ==
                0);

    memset(output, 0x00, sizeof(output));
    memset(&rnd_info, 0, sizeof(mbedtls_test_rnd_pseudo_info));

    TEST_ASSERT(mbedtls_test_read_mpi(&P, radix_P, input_P) == 0);
    TEST_ASSERT(mbedtls_test_read_mpi(&Q, radix_Q, input_Q) == 0);
    TEST_ASSERT(mbedtls_test_read_mpi(&N, radix_N, input_N) == 0);
    TEST_ASSERT(mbedtls_test_read_mpi(&E, radix_E, input_E) == 0);

    TEST_ASSERT(mbedtls_rsa_import(&ctx, &N, &P, &Q, NULL, &E) == 0);
    TEST_ASSERT(mbedtls_rsa_get_len(&ctx) == (size_t)(mod / 8));
    TEST_ASSERT(mbedtls_rsa_complete(&ctx) == 0);
    TEST_ASSERT(mbedtls_rsa_check_privkey(&ctx) == 0);

    TEST_ASSERT(mbedtls_rsa_pkcs1_sign(&ctx, &mbedtls_test_rnd_pseudo_rand,
                                       &rnd_info, MBEDTLS_MD_NONE,
                                       hash_result->len, hash_result->x,
                                       output) == 0);

    TEST_ASSERT(mbedtls_test_hexcmp(output, result_str->x, ctx.len,
                                    result_str->len) == 0);

exit:
    mbedtls_mpi_free(&N);
    mbedtls_mpi_free(&P);
    mbedtls_mpi_free(&Q);
    mbedtls_mpi_free(&E);

    mbedtls_rsa_free(&ctx);
}
/* END_CASE */

/* BEGIN_CASE */
void rsa_pkcs1_verify_raw(data_t *hash_result,
                          int padding_mode,
                          int mod,
                          int radix_N,
                          char *input_N,
                          int radix_E,
                          char *input_E,
                          data_t *result_str,
                          int correct)
{
    unsigned char output[256];
    mbedtls_rsa_context ctx;

    mbedtls_mpi N, E;
    mbedtls_mpi_init(&N);
    mbedtls_mpi_init(&E);

    mbedtls_rsa_init(&ctx);
    TEST_ASSERT(mbedtls_rsa_set_padding(&ctx, padding_mode, MBEDTLS_MD_NONE) ==
                0);
    memset(output, 0x00, sizeof(output));

    TEST_ASSERT(mbedtls_test_read_mpi(&N, radix_N, input_N) == 0);
    TEST_ASSERT(mbedtls_test_read_mpi(&E, radix_E, input_E) == 0);

    TEST_ASSERT(mbedtls_rsa_import(&ctx, &N, NULL, NULL, NULL, &E) == 0);
    TEST_ASSERT(mbedtls_rsa_get_len(&ctx) == (size_t)(mod / 8));
    TEST_ASSERT(mbedtls_rsa_check_pubkey(&ctx) == 0);

    TEST_ASSERT(mbedtls_rsa_pkcs1_verify(&ctx, MBEDTLS_MD_NONE,
                                         hash_result->len, hash_result->x,
                                         result_str->x) == correct);

exit:
    mbedtls_mpi_free(&N);
    mbedtls_mpi_free(&E);
    mbedtls_rsa_free(&ctx);
}
/* END_CASE */

/* BEGIN_CASE */
void mbedtls_rsa_pkcs1_encrypt(data_t *message_str,
                               int padding_mode,
                               int mod,
                               int radix_N,
                               char *input_N,
                               int radix_E,
                               char *input_E,
                               data_t *result_str,
                               int result)
{
    unsigned char output[256];
    mbedtls_rsa_context ctx;
    mbedtls_test_rnd_pseudo_info rnd_info;

    mbedtls_mpi N, E;
    mbedtls_mpi_init(&N);
    mbedtls_mpi_init(&E);

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

    mbedtls_rsa_init(&ctx);
    TEST_ASSERT(mbedtls_rsa_set_padding(&ctx, padding_mode, MBEDTLS_MD_NONE) ==
                0);
    memset(output, 0x00, sizeof(output));

    TEST_ASSERT(mbedtls_test_read_mpi(&N, radix_N, input_N) == 0);
    TEST_ASSERT(mbedtls_test_read_mpi(&E, radix_E, input_E) == 0);

    TEST_ASSERT(mbedtls_rsa_import(&ctx, &N, NULL, NULL, NULL, &E) == 0);
    TEST_ASSERT(mbedtls_rsa_get_len(&ctx) == (size_t)(mod / 8));
    TEST_ASSERT(mbedtls_rsa_check_pubkey(&ctx) == 0);

    TEST_ASSERT(mbedtls_rsa_pkcs1_encrypt(&ctx, &mbedtls_test_rnd_pseudo_rand,
                                          &rnd_info, message_str->len,
                                          message_str->x, output) == result);
    if (result == 0) {
        TEST_ASSERT(mbedtls_test_hexcmp(output, result_str->x, ctx.len,
                                        result_str->len) == 0);
    }

exit:
    mbedtls_mpi_free(&N);
    mbedtls_mpi_free(&E);
    mbedtls_rsa_free(&ctx);
}
/* END_CASE */

/* BEGIN_CASE */
void rsa_pkcs1_encrypt_bad_rng(data_t *message_str,
                               int padding_mode,
                               int mod,
                               int radix_N,
                               char *input_N,
                               int radix_E,
                               char *input_E,
                               data_t *result_str,
                               int result)
{
    unsigned char output[256];
    mbedtls_rsa_context ctx;

    mbedtls_mpi N, E;

    mbedtls_mpi_init(&N);
    mbedtls_mpi_init(&E);
    mbedtls_rsa_init(&ctx);
    TEST_ASSERT(mbedtls_rsa_set_padding(&ctx, padding_mode, MBEDTLS_MD_NONE) ==
                0);
    memset(output, 0x00, sizeof(output));

    TEST_ASSERT(mbedtls_test_read_mpi(&N, radix_N, input_N) == 0);
    TEST_ASSERT(mbedtls_test_read_mpi(&E, radix_E, input_E) == 0);

    TEST_ASSERT(mbedtls_rsa_import(&ctx, &N, NULL, NULL, NULL, &E) == 0);
    TEST_ASSERT(mbedtls_rsa_get_len(&ctx) == (size_t)(mod / 8));
    TEST_ASSERT(mbedtls_rsa_check_pubkey(&ctx) == 0);

    TEST_ASSERT(mbedtls_rsa_pkcs1_encrypt(&ctx, &mbedtls_test_rnd_zero_rand,
                                          NULL, message_str->len,
                                          message_str->x, output) == result);
    if (result == 0) {
        TEST_ASSERT(mbedtls_test_hexcmp(output, result_str->x, ctx.len,
                                        result_str->len) == 0);
    }

exit:
    mbedtls_mpi_free(&N);
    mbedtls_mpi_free(&E);
    mbedtls_rsa_free(&ctx);
}
/* END_CASE */

/* BEGIN_CASE */
void mbedtls_rsa_pkcs1_decrypt(data_t *message_str,
                               int padding_mode,
                               int mod,
                               int radix_P,
                               char *input_P,
                               int radix_Q,
                               char *input_Q,
                               int radix_N,
                               char *input_N,
                               int radix_E,
                               char *input_E,
                               int max_output,
                               data_t *result_str,
                               int result)
{
    unsigned char output[32];
    mbedtls_rsa_context ctx;
    size_t output_len;
    mbedtls_test_rnd_pseudo_info rnd_info;
    mbedtls_mpi N, P, Q, E;

    mbedtls_mpi_init(&N);
    mbedtls_mpi_init(&P);
    mbedtls_mpi_init(&Q);
    mbedtls_mpi_init(&E);

    mbedtls_rsa_init(&ctx);
    TEST_ASSERT(mbedtls_rsa_set_padding(&ctx, padding_mode, MBEDTLS_MD_NONE) ==
                0);

    memset(output, 0x00, sizeof(output));
    memset(&rnd_info, 0, sizeof(mbedtls_test_rnd_pseudo_info));

    TEST_ASSERT(mbedtls_test_read_mpi(&P, radix_P, input_P) == 0);
    TEST_ASSERT(mbedtls_test_read_mpi(&Q, radix_Q, input_Q) == 0);
    TEST_ASSERT(mbedtls_test_read_mpi(&N, radix_N, input_N) == 0);
    TEST_ASSERT(mbedtls_test_read_mpi(&E, radix_E, input_E) == 0);

    TEST_ASSERT(mbedtls_rsa_import(&ctx, &N, &P, &Q, NULL, &E) == 0);
    TEST_ASSERT(mbedtls_rsa_get_len(&ctx) == (size_t)(mod / 8));
    TEST_ASSERT(mbedtls_rsa_complete(&ctx) == 0);
    TEST_ASSERT(mbedtls_rsa_check_privkey(&ctx) == 0);

    output_len = 0;

    TEST_ASSERT(mbedtls_rsa_pkcs1_decrypt(
                    &ctx, mbedtls_test_rnd_pseudo_rand, &rnd_info, &output_len,
                    message_str->x, output, max_output) == result);
    if (result == 0) {
        TEST_ASSERT(mbedtls_test_hexcmp(output, result_str->x, output_len,
                                        result_str->len) == 0);
    }

exit:
    mbedtls_mpi_free(&N);
    mbedtls_mpi_free(&P);
    mbedtls_mpi_free(&Q);
    mbedtls_mpi_free(&E);
    mbedtls_rsa_free(&ctx);
}
/* END_CASE */

/* BEGIN_CASE */
void mbedtls_rsa_public(data_t *message_str,
                        int mod,
                        int radix_N,
                        char *input_N,
                        int radix_E,
                        char *input_E,
                        data_t *result_str,
                        int result)
{
    unsigned char output[256];
    mbedtls_rsa_context ctx, ctx2; /* Also test mbedtls_rsa_copy() while at it
                                    */

    mbedtls_mpi N, E;

    mbedtls_mpi_init(&N);
    mbedtls_mpi_init(&E);
    mbedtls_rsa_init(&ctx);
    mbedtls_rsa_init(&ctx2);
    memset(output, 0x00, sizeof(output));

    TEST_ASSERT(mbedtls_test_read_mpi(&N, radix_N, input_N) == 0);
    TEST_ASSERT(mbedtls_test_read_mpi(&E, radix_E, input_E) == 0);

    TEST_ASSERT(mbedtls_rsa_import(&ctx, &N, NULL, NULL, NULL, &E) == 0);

    /* Check test data consistency */
    TEST_ASSERT(message_str->len == (size_t)(mod / 8));
    TEST_ASSERT(mbedtls_rsa_get_len(&ctx) == (size_t)(mod / 8));
    TEST_ASSERT(mbedtls_rsa_check_pubkey(&ctx) == 0);

    TEST_ASSERT(mbedtls_rsa_public(&ctx, message_str->x, output) == result);
    if (result == 0) {
        TEST_ASSERT(mbedtls_test_hexcmp(output, result_str->x, ctx.len,
                                        result_str->len) == 0);
    }

    /* And now with the copy */
    TEST_ASSERT(mbedtls_rsa_copy(&ctx2, &ctx) == 0);
    /* clear the original to be sure */
    mbedtls_rsa_free(&ctx);

    TEST_ASSERT(mbedtls_rsa_check_pubkey(&ctx2) == 0);

    memset(output, 0x00, sizeof(output));
    TEST_ASSERT(mbedtls_rsa_public(&ctx2, message_str->x, output) == result);
    if (result == 0) {
        TEST_ASSERT(mbedtls_test_hexcmp(output, result_str->x, ctx.len,
                                        result_str->len) == 0);
    }

exit:
    mbedtls_mpi_free(&N);
    mbedtls_mpi_free(&E);
    mbedtls_rsa_free(&ctx);
    mbedtls_rsa_free(&ctx2);
}
/* END_CASE */

/* BEGIN_CASE */
void mbedtls_rsa_private(data_t *message_str,
                         int mod,
                         int radix_P,
                         char *input_P,
                         int radix_Q,
                         char *input_Q,
                         int radix_N,
                         char *input_N,
                         int radix_E,
                         char *input_E,
                         data_t *result_str,
                         int result)
{
    unsigned char output[256];
    mbedtls_rsa_context ctx, ctx2; /* Also test mbedtls_rsa_copy() while at it
                                    */
    mbedtls_mpi N, P, Q, E;
    mbedtls_test_rnd_pseudo_info rnd_info;
    int i;

    mbedtls_mpi_init(&N);
    mbedtls_mpi_init(&P);
    mbedtls_mpi_init(&Q);
    mbedtls_mpi_init(&E);
    mbedtls_rsa_init(&ctx);
    mbedtls_rsa_init(&ctx2);

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

    TEST_ASSERT(mbedtls_test_read_mpi(&P, radix_P, input_P) == 0);
    TEST_ASSERT(mbedtls_test_read_mpi(&Q, radix_Q, input_Q) == 0);
    TEST_ASSERT(mbedtls_test_read_mpi(&N, radix_N, input_N) == 0);
    TEST_ASSERT(mbedtls_test_read_mpi(&E, radix_E, input_E) == 0);

    TEST_ASSERT(mbedtls_rsa_import(&ctx, &N, &P, &Q, NULL, &E) == 0);

    /* Check test data consistency */
    TEST_ASSERT(message_str->len == (size_t)(mod / 8));
    TEST_ASSERT(mbedtls_rsa_get_len(&ctx) == (size_t)(mod / 8));
    TEST_ASSERT(mbedtls_rsa_complete(&ctx) == 0);
    TEST_ASSERT(mbedtls_rsa_check_privkey(&ctx) == 0);

    /* repeat three times to test updating of blinding values */
    for (i = 0; i < 3; i++) {
        memset(output, 0x00, sizeof(output));
        TEST_ASSERT(mbedtls_rsa_private(&ctx, mbedtls_test_rnd_pseudo_rand,
                                        &rnd_info, message_str->x,
                                        output) == result);
        if (result == 0) {
            TEST_ASSERT(mbedtls_test_hexcmp(output, result_str->x, ctx.len,
                                            result_str->len) == 0);
        }
    }

    /* And now one more time with the copy */
    TEST_ASSERT(mbedtls_rsa_copy(&ctx2, &ctx) == 0);
    /* clear the original to be sure */
    mbedtls_rsa_free(&ctx);

    TEST_ASSERT(mbedtls_rsa_check_privkey(&ctx2) == 0);

    memset(output, 0x00, sizeof(output));
    TEST_ASSERT(mbedtls_rsa_private(&ctx2, mbedtls_test_rnd_pseudo_rand,
                                    &rnd_info, message_str->x,
                                    output) == result);
    if (result == 0) {
        TEST_ASSERT(mbedtls_test_hexcmp(output, result_str->x, ctx2.len,
                                        result_str->len) == 0);
    }

exit:
    mbedtls_mpi_free(&N);
    mbedtls_mpi_free(&P);
    mbedtls_mpi_free(&Q);
    mbedtls_mpi_free(&E);

    mbedtls_rsa_free(&ctx);
    mbedtls_rsa_free(&ctx2);
}
/* END_CASE */

/* BEGIN_CASE */
void rsa_check_privkey_null()
{
    mbedtls_rsa_context ctx;
    memset(&ctx, 0x00, sizeof(mbedtls_rsa_context));

    TEST_ASSERT(mbedtls_rsa_check_privkey(&ctx) ==
                MBEDTLS_ERR_RSA_KEY_CHECK_FAILED);
}
/* END_CASE */

/* BEGIN_CASE */
void mbedtls_rsa_check_pubkey(int radix_N,
                              char *input_N,
                              int radix_E,
                              char *input_E,
                              int result)
{
    mbedtls_rsa_context ctx;
    mbedtls_mpi N, E;

    mbedtls_mpi_init(&N);
    mbedtls_mpi_init(&E);
    mbedtls_rsa_init(&ctx);

    if (strlen(input_N)) {
        TEST_ASSERT(mbedtls_test_read_mpi(&N, radix_N, input_N) == 0);
    }
    if (strlen(input_E)) {
        TEST_ASSERT(mbedtls_test_read_mpi(&E, radix_E, input_E) == 0);
    }

    TEST_ASSERT(mbedtls_rsa_import(&ctx, &N, NULL, NULL, NULL, &E) == 0);
    TEST_ASSERT(mbedtls_rsa_check_pubkey(&ctx) == result);

exit:
    mbedtls_mpi_free(&N);
    mbedtls_mpi_free(&E);
    mbedtls_rsa_free(&ctx);
}
/* END_CASE */

/* BEGIN_CASE */
void mbedtls_rsa_check_privkey(int mod,
                               int radix_P,
                               char *input_P,
                               int radix_Q,
                               char *input_Q,
                               int radix_N,
                               char *input_N,
                               int radix_E,
                               char *input_E,
                               int radix_D,
                               char *input_D,
                               int radix_DP,
                               char *input_DP,
                               int radix_DQ,
                               char *input_DQ,
                               int radix_QP,
                               char *input_QP,
                               int result)
{
    mbedtls_rsa_context ctx;

    mbedtls_rsa_init(&ctx);

    ctx.len = mod / 8;
    if (strlen(input_P)) {
        TEST_ASSERT(mbedtls_test_read_mpi(&ctx.P, radix_P, input_P) == 0);
    }
    if (strlen(input_Q)) {
        TEST_ASSERT(mbedtls_test_read_mpi(&ctx.Q, radix_Q, input_Q) == 0);
    }
    if (strlen(input_N)) {
        TEST_ASSERT(mbedtls_test_read_mpi(&ctx.N, radix_N, input_N) == 0);
    }
    if (strlen(input_E)) {
        TEST_ASSERT(mbedtls_test_read_mpi(&ctx.E, radix_E, input_E) == 0);
    }
    if (strlen(input_D)) {
        TEST_ASSERT(mbedtls_test_read_mpi(&ctx.D, radix_D, input_D) == 0);
    }
#if !defined(MBEDTLS_RSA_NO_CRT)
    if (strlen(input_DP)) {
        TEST_ASSERT(mbedtls_test_read_mpi(&ctx.DP, radix_DP, input_DP) == 0);
    }
    if (strlen(input_DQ)) {
        TEST_ASSERT(mbedtls_test_read_mpi(&ctx.DQ, radix_DQ, input_DQ) == 0);
    }
    if (strlen(input_QP)) {
        TEST_ASSERT(mbedtls_test_read_mpi(&ctx.QP, radix_QP, input_QP) == 0);
    }
#else
    ((void)radix_DP);
    ((void)input_DP);
    ((void)radix_DQ);
    ((void)input_DQ);
    ((void)radix_QP);
    ((void)input_QP);
#endif

    TEST_ASSERT(mbedtls_rsa_check_privkey(&ctx) == result);

exit:
    mbedtls_rsa_free(&ctx);
}
/* END_CASE */

/* BEGIN_CASE */
void rsa_check_pubpriv(int mod,
                       int radix_Npub,
                       char *input_Npub,
                       int radix_Epub,
                       char *input_Epub,
                       int radix_P,
                       char *input_P,
                       int radix_Q,
                       char *input_Q,
                       int radix_N,
                       char *input_N,
                       int radix_E,
                       char *input_E,
                       int radix_D,
                       char *input_D,
                       int radix_DP,
                       char *input_DP,
                       int radix_DQ,
                       char *input_DQ,
                       int radix_QP,
                       char *input_QP,
                       int result)
{
    mbedtls_rsa_context pub, prv;

    mbedtls_rsa_init(&pub);
    mbedtls_rsa_init(&prv);

    pub.len = mod / 8;
    prv.len = mod / 8;

    if (strlen(input_Npub)) {
        TEST_ASSERT(mbedtls_test_read_mpi(&pub.N, radix_Npub, input_Npub) == 0);
    }
    if (strlen(input_Epub)) {
        TEST_ASSERT(mbedtls_test_read_mpi(&pub.E, radix_Epub, input_Epub) == 0);
    }

    if (strlen(input_P)) {
        TEST_ASSERT(mbedtls_test_read_mpi(&prv.P, radix_P, input_P) == 0);
    }
    if (strlen(input_Q)) {
        TEST_ASSERT(mbedtls_test_read_mpi(&prv.Q, radix_Q, input_Q) == 0);
    }
    if (strlen(input_N)) {
        TEST_ASSERT(mbedtls_test_read_mpi(&prv.N, radix_N, input_N) == 0);
    }
    if (strlen(input_E)) {
        TEST_ASSERT(mbedtls_test_read_mpi(&prv.E, radix_E, input_E) == 0);
    }
    if (strlen(input_D)) {
        TEST_ASSERT(mbedtls_test_read_mpi(&prv.D, radix_D, input_D) == 0);
    }
#if !defined(MBEDTLS_RSA_NO_CRT)
    if (strlen(input_DP)) {
        TEST_ASSERT(mbedtls_test_read_mpi(&prv.DP, radix_DP, input_DP) == 0);
    }
    if (strlen(input_DQ)) {
        TEST_ASSERT(mbedtls_test_read_mpi(&prv.DQ, radix_DQ, input_DQ) == 0);
    }
    if (strlen(input_QP)) {
        TEST_ASSERT(mbedtls_test_read_mpi(&prv.QP, radix_QP, input_QP) == 0);
    }
#else
    ((void)radix_DP);
    ((void)input_DP);
    ((void)radix_DQ);
    ((void)input_DQ);
    ((void)radix_QP);
    ((void)input_QP);
#endif

    TEST_ASSERT(mbedtls_rsa_check_pub_priv(&pub, &prv) == result);

exit:
    mbedtls_rsa_free(&pub);
    mbedtls_rsa_free(&prv);
}
/* END_CASE */

/* BEGIN_CASE depends_on:MBEDTLS_CTR_DRBG_C:MBEDTLS_ENTROPY_C:ENTROPY_HAVE_STRONG */
void mbedtls_rsa_gen_key(int nrbits, int exponent, int result)
{
    mbedtls_rsa_context ctx;
    mbedtls_entropy_context entropy;
    mbedtls_ctr_drbg_context ctr_drbg;
    const char *pers = "test_suite_rsa";

    mbedtls_ctr_drbg_init(&ctr_drbg);
    mbedtls_entropy_init(&entropy);
    mbedtls_rsa_init(&ctx);

    TEST_ASSERT(mbedtls_ctr_drbg_seed(&ctr_drbg, mbedtls_entropy_func, &entropy,
                                      (const unsigned char *)pers,
                                      strlen(pers)) == 0);

    TEST_ASSERT(mbedtls_rsa_gen_key(&ctx, mbedtls_ctr_drbg_random, &ctr_drbg,
                                    nrbits, exponent) == result);
    if (result == 0) {
        TEST_ASSERT(mbedtls_rsa_check_privkey(&ctx) == 0);
        TEST_ASSERT(mbedtls_mpi_cmp_mpi(&ctx.P, &ctx.Q) > 0);
    }

exit:
    mbedtls_rsa_free(&ctx);
    mbedtls_ctr_drbg_free(&ctr_drbg);
    mbedtls_entropy_free(&entropy);
}
/* END_CASE */

/* BEGIN_CASE depends_on:MBEDTLS_CTR_DRBG_C:MBEDTLS_ENTROPY_C */
void mbedtls_rsa_deduce_primes(int radix_N,
                               char *input_N,
                               int radix_D,
                               char *input_D,
                               int radix_E,
                               char *input_E,
                               int radix_P,
                               char *output_P,
                               int radix_Q,
                               char *output_Q,
                               int corrupt,
                               int result)
{
    mbedtls_mpi N, P, Pp, Q, Qp, D, E;

    mbedtls_mpi_init(&N);
    mbedtls_mpi_init(&P);
    mbedtls_mpi_init(&Q);
    mbedtls_mpi_init(&Pp);
    mbedtls_mpi_init(&Qp);
    mbedtls_mpi_init(&D);
    mbedtls_mpi_init(&E);

    TEST_ASSERT(mbedtls_test_read_mpi(&N, radix_N, input_N) == 0);
    TEST_ASSERT(mbedtls_test_read_mpi(&D, radix_D, input_D) == 0);
    TEST_ASSERT(mbedtls_test_read_mpi(&E, radix_E, input_E) == 0);
    TEST_ASSERT(mbedtls_test_read_mpi(&Qp, radix_P, output_P) == 0);
    TEST_ASSERT(mbedtls_test_read_mpi(&Pp, radix_Q, output_Q) == 0);

    if (corrupt)
        TEST_ASSERT(mbedtls_mpi_add_int(&D, &D, 2) == 0);

    /* Try to deduce P, Q from N, D, E only. */
    TEST_ASSERT(mbedtls_rsa_deduce_primes(&N, &D, &E, &P, &Q) == result);

    if (!corrupt) {
        /* Check if (P,Q) = (Pp, Qp) or (P,Q) = (Qp, Pp) */
        TEST_ASSERT((mbedtls_mpi_cmp_mpi(&P, &Pp) == 0 &&
                     mbedtls_mpi_cmp_mpi(&Q, &Qp) == 0) ||
                    (mbedtls_mpi_cmp_mpi(&P, &Qp) == 0 &&
                     mbedtls_mpi_cmp_mpi(&Q, &Pp) == 0));
    }

exit:
    mbedtls_mpi_free(&N);
    mbedtls_mpi_free(&P);
    mbedtls_mpi_free(&Q);
    mbedtls_mpi_free(&Pp);
    mbedtls_mpi_free(&Qp);
    mbedtls_mpi_free(&D);
    mbedtls_mpi_free(&E);
}
/* END_CASE */

/* BEGIN_CASE */
void mbedtls_rsa_deduce_private_exponent(int radix_P,
                                         char *input_P,
                                         int radix_Q,
                                         char *input_Q,
                                         int radix_E,
                                         char *input_E,
                                         int radix_D,
                                         char *output_D,
                                         int corrupt,
                                         int result)
{
    mbedtls_mpi P, Q, D, Dp, E, R, Rp;

    mbedtls_mpi_init(&P);
    mbedtls_mpi_init(&Q);
    mbedtls_mpi_init(&D);
    mbedtls_mpi_init(&Dp);
    mbedtls_mpi_init(&E);
    mbedtls_mpi_init(&R);
    mbedtls_mpi_init(&Rp);

    TEST_ASSERT(mbedtls_test_read_mpi(&P, radix_P, input_P) == 0);
    TEST_ASSERT(mbedtls_test_read_mpi(&Q, radix_Q, input_Q) == 0);
    TEST_ASSERT(mbedtls_test_read_mpi(&E, radix_E, input_E) == 0);
    TEST_ASSERT(mbedtls_test_read_mpi(&Dp, radix_D, output_D) == 0);

    if (corrupt) {
        /* Make E even */
        TEST_ASSERT(mbedtls_mpi_set_bit(&E, 0, 0) == 0);
    }

    /* Try to deduce D from N, P, Q, E. */
    TEST_ASSERT(mbedtls_rsa_deduce_private_exponent(&P, &Q, &E, &D) == result);

    if (!corrupt) {
        /*
         * Check that D and Dp agree modulo LCM(P-1, Q-1).
         */

        /* Replace P,Q by P-1, Q-1 */
        TEST_ASSERT(mbedtls_mpi_sub_int(&P, &P, 1) == 0);
        TEST_ASSERT(mbedtls_mpi_sub_int(&Q, &Q, 1) == 0);

        /* Check D == Dp modulo P-1 */
        TEST_ASSERT(mbedtls_mpi_mod_mpi(&R, &D, &P) == 0);
        TEST_ASSERT(mbedtls_mpi_mod_mpi(&Rp, &Dp, &P) == 0);
        TEST_ASSERT(mbedtls_mpi_cmp_mpi(&R, &Rp) == 0);

        /* Check D == Dp modulo Q-1 */
        TEST_ASSERT(mbedtls_mpi_mod_mpi(&R, &D, &Q) == 0);
        TEST_ASSERT(mbedtls_mpi_mod_mpi(&Rp, &Dp, &Q) == 0);
        TEST_ASSERT(mbedtls_mpi_cmp_mpi(&R, &Rp) == 0);
    }

exit:

    mbedtls_mpi_free(&P);
    mbedtls_mpi_free(&Q);
    mbedtls_mpi_free(&D);
    mbedtls_mpi_free(&Dp);
    mbedtls_mpi_free(&E);
    mbedtls_mpi_free(&R);
    mbedtls_mpi_free(&Rp);
}
/* END_CASE */

/* BEGIN_CASE depends_on:MBEDTLS_CTR_DRBG_C:MBEDTLS_ENTROPY_C:ENTROPY_HAVE_STRONG */
void mbedtls_rsa_import(int radix_N,
                        char *input_N,
                        int radix_P,
                        char *input_P,
                        int radix_Q,
                        char *input_Q,
                        int radix_D,
                        char *input_D,
                        int radix_E,
                        char *input_E,
                        int successive,
                        int is_priv,
                        int res_check,
                        int res_complete)
{
    mbedtls_mpi N, P, Q, D, E;
    mbedtls_rsa_context ctx;

    /* Buffers used for encryption-decryption test */
    unsigned char *buf_orig = NULL;
    unsigned char *buf_enc = NULL;
    unsigned char *buf_dec = NULL;

    mbedtls_entropy_context entropy;
    mbedtls_ctr_drbg_context ctr_drbg;
    const char *pers = "test_suite_rsa";

    const int have_N = (strlen(input_N) > 0);
    const int have_P = (strlen(input_P) > 0);
    const int have_Q = (strlen(input_Q) > 0);
    const int have_D = (strlen(input_D) > 0);
    const int have_E = (strlen(input_E) > 0);

    mbedtls_ctr_drbg_init(&ctr_drbg);
    mbedtls_entropy_init(&entropy);
    mbedtls_rsa_init(&ctx);

    mbedtls_mpi_init(&N);
    mbedtls_mpi_init(&P);
    mbedtls_mpi_init(&Q);
    mbedtls_mpi_init(&D);
    mbedtls_mpi_init(&E);

    TEST_ASSERT(mbedtls_ctr_drbg_seed(&ctr_drbg, mbedtls_entropy_func, &entropy,
                                      (const unsigned char *)pers,
                                      strlen(pers)) == 0);

    if (have_N)
        TEST_ASSERT(mbedtls_test_read_mpi(&N, radix_N, input_N) == 0);

    if (have_P)
        TEST_ASSERT(mbedtls_test_read_mpi(&P, radix_P, input_P) == 0);

    if (have_Q)
        TEST_ASSERT(mbedtls_test_read_mpi(&Q, radix_Q, input_Q) == 0);

    if (have_D)
        TEST_ASSERT(mbedtls_test_read_mpi(&D, radix_D, input_D) == 0);

    if (have_E)
        TEST_ASSERT(mbedtls_test_read_mpi(&E, radix_E, input_E) == 0);

    if (!successive) {
        TEST_ASSERT(mbedtls_rsa_import(&ctx, have_N ? &N : NULL,
                                       have_P ? &P : NULL, have_Q ? &Q : NULL,
                                       have_D ? &D : NULL,
                                       have_E ? &E : NULL) == 0);
    } else {
        /* Import N, P, Q, D, E separately.
         * This should make no functional difference. */

        TEST_ASSERT(mbedtls_rsa_import(&ctx, have_N ? &N : NULL, NULL, NULL,
                                       NULL, NULL) == 0);

        TEST_ASSERT(mbedtls_rsa_import(&ctx, NULL, have_P ? &P : NULL, NULL,
                                       NULL, NULL) == 0);

        TEST_ASSERT(mbedtls_rsa_import(&ctx, NULL, NULL, have_Q ? &Q : NULL,
                                       NULL, NULL) == 0);

        TEST_ASSERT(mbedtls_rsa_import(&ctx, NULL, NULL, NULL,
                                       have_D ? &D : NULL, NULL) == 0);

        TEST_ASSERT(mbedtls_rsa_import(&ctx, NULL, NULL, NULL, NULL,
                                       have_E ? &E : NULL) == 0);
    }

    TEST_ASSERT(mbedtls_rsa_complete(&ctx) == res_complete);

    /* On expected success, perform some public and private
     * key operations to check if the key is working properly. */
    if (res_complete == 0) {
        if (is_priv)
            TEST_ASSERT(mbedtls_rsa_check_privkey(&ctx) == res_check);
        else
            TEST_ASSERT(mbedtls_rsa_check_pubkey(&ctx) == res_check);

        if (res_check != 0)
            goto exit;

        buf_orig = mbedtls_calloc(1, mbedtls_rsa_get_len(&ctx));
        buf_enc = mbedtls_calloc(1, mbedtls_rsa_get_len(&ctx));
        buf_dec = mbedtls_calloc(1, mbedtls_rsa_get_len(&ctx));
        if (buf_orig == NULL || buf_enc == NULL || buf_dec == NULL)
            goto exit;

        TEST_ASSERT(mbedtls_ctr_drbg_random(&ctr_drbg, buf_orig,
                                            mbedtls_rsa_get_len(&ctx)) == 0);

        /* Make sure the number we're generating is smaller than the modulus */
        buf_orig[0] = 0x00;

        TEST_ASSERT(mbedtls_rsa_public(&ctx, buf_orig, buf_enc) == 0);

        if (is_priv) {
            TEST_ASSERT(mbedtls_rsa_private(&ctx, mbedtls_ctr_drbg_random,
                                            &ctr_drbg, buf_enc, buf_dec) == 0);

            TEST_ASSERT(memcmp(buf_orig, buf_dec, mbedtls_rsa_get_len(&ctx)) ==
                        0);
        }
    }

exit:

    mbedtls_free(buf_orig);
    mbedtls_free(buf_enc);
    mbedtls_free(buf_dec);

    mbedtls_rsa_free(&ctx);

    mbedtls_ctr_drbg_free(&ctr_drbg);
    mbedtls_entropy_free(&entropy);

    mbedtls_mpi_free(&N);
    mbedtls_mpi_free(&P);
    mbedtls_mpi_free(&Q);
    mbedtls_mpi_free(&D);
    mbedtls_mpi_free(&E);
}
/* END_CASE */

/* BEGIN_CASE */
void mbedtls_rsa_export(int radix_N,
                        char *input_N,
                        int radix_P,
                        char *input_P,
                        int radix_Q,
                        char *input_Q,
                        int radix_D,
                        char *input_D,
                        int radix_E,
                        char *input_E,
                        int is_priv,
                        int successive)
{
    /* Original MPI's with which we set up the RSA context */
    mbedtls_mpi N, P, Q, D, E;

    /* Exported MPI's */
    mbedtls_mpi Ne, Pe, Qe, De, Ee;

    const int have_N = (strlen(input_N) > 0);
    const int have_P = (strlen(input_P) > 0);
    const int have_Q = (strlen(input_Q) > 0);
    const int have_D = (strlen(input_D) > 0);
    const int have_E = (strlen(input_E) > 0);

    mbedtls_rsa_context ctx;

    mbedtls_rsa_init(&ctx);

    mbedtls_mpi_init(&N);
    mbedtls_mpi_init(&P);
    mbedtls_mpi_init(&Q);
    mbedtls_mpi_init(&D);
    mbedtls_mpi_init(&E);

    mbedtls_mpi_init(&Ne);
    mbedtls_mpi_init(&Pe);
    mbedtls_mpi_init(&Qe);
    mbedtls_mpi_init(&De);
    mbedtls_mpi_init(&Ee);

    /* Setup RSA context */

    if (have_N)
        TEST_ASSERT(mbedtls_test_read_mpi(&N, radix_N, input_N) == 0);

    if (have_P)
        TEST_ASSERT(mbedtls_test_read_mpi(&P, radix_P, input_P) == 0);

    if (have_Q)
        TEST_ASSERT(mbedtls_test_read_mpi(&Q, radix_Q, input_Q) == 0);

    if (have_D)
        TEST_ASSERT(mbedtls_test_read_mpi(&D, radix_D, input_D) == 0);

    if (have_E)
        TEST_ASSERT(mbedtls_test_read_mpi(&E, radix_E, input_E) == 0);

    TEST_ASSERT(mbedtls_rsa_import(&ctx, strlen(input_N) ? &N : NULL,
                                   strlen(input_P) ? &P : NULL,
                                   strlen(input_Q) ? &Q : NULL,
                                   strlen(input_D) ? &D : NULL,
                                   strlen(input_E) ? &E : NULL) == 0);

    TEST_ASSERT(mbedtls_rsa_complete(&ctx) == 0);

    /*
     * Export parameters and compare to original ones.
     */

    /* N and E must always be present. */
    if (!successive) {
        TEST_ASSERT(mbedtls_rsa_export(&ctx, &Ne, NULL, NULL, NULL, &Ee) == 0);
    } else {
        TEST_ASSERT(mbedtls_rsa_export(&ctx, &Ne, NULL, NULL, NULL, NULL) == 0);
        TEST_ASSERT(mbedtls_rsa_export(&ctx, NULL, NULL, NULL, NULL, &Ee) == 0);
    }
    TEST_ASSERT(mbedtls_mpi_cmp_mpi(&N, &Ne) == 0);
    TEST_ASSERT(mbedtls_mpi_cmp_mpi(&E, &Ee) == 0);

    /* If we were providing enough information to setup a complete private
     * context, we expect to be able to export all core parameters. */

    if (is_priv) {
        if (!successive) {
            TEST_ASSERT(mbedtls_rsa_export(&ctx, NULL, &Pe, &Qe, &De, NULL) ==
                        0);
        } else {
            TEST_ASSERT(mbedtls_rsa_export(&ctx, NULL, &Pe, NULL, NULL, NULL) ==
                        0);
            TEST_ASSERT(mbedtls_rsa_export(&ctx, NULL, NULL, &Qe, NULL, NULL) ==
                        0);
            TEST_ASSERT(mbedtls_rsa_export(&ctx, NULL, NULL, NULL, &De, NULL) ==
                        0);
        }

        if (have_P)
            TEST_ASSERT(mbedtls_mpi_cmp_mpi(&P, &Pe) == 0);

        if (have_Q)
            TEST_ASSERT(mbedtls_mpi_cmp_mpi(&Q, &Qe) == 0);

        if (have_D)
            TEST_ASSERT(mbedtls_mpi_cmp_mpi(&D, &De) == 0);

        /* While at it, perform a sanity check */
        TEST_ASSERT(mbedtls_rsa_validate_params(&Ne, &Pe, &Qe, &De, &Ee, NULL,
                                                NULL) == 0);
    }

exit:

    mbedtls_rsa_free(&ctx);

    mbedtls_mpi_free(&N);
    mbedtls_mpi_free(&P);
    mbedtls_mpi_free(&Q);
    mbedtls_mpi_free(&D);
    mbedtls_mpi_free(&E);

    mbedtls_mpi_free(&Ne);
    mbedtls_mpi_free(&Pe);
    mbedtls_mpi_free(&Qe);
    mbedtls_mpi_free(&De);
    mbedtls_mpi_free(&Ee);
}
/* END_CASE */

/* BEGIN_CASE depends_on:MBEDTLS_ENTROPY_C:ENTROPY_HAVE_STRONG:MBEDTLS_ENTROPY_C:MBEDTLS_CTR_DRBG_C */
void mbedtls_rsa_validate_params(int radix_N,
                                 char *input_N,
                                 int radix_P,
                                 char *input_P,
                                 int radix_Q,
                                 char *input_Q,
                                 int radix_D,
                                 char *input_D,
                                 int radix_E,
                                 char *input_E,
                                 int prng,
                                 int result)
{
    /* Original MPI's with which we set up the RSA context */
    mbedtls_mpi N, P, Q, D, E;

    const int have_N = (strlen(input_N) > 0);
    const int have_P = (strlen(input_P) > 0);
    const int have_Q = (strlen(input_Q) > 0);
    const int have_D = (strlen(input_D) > 0);
    const int have_E = (strlen(input_E) > 0);

    mbedtls_entropy_context entropy;
    mbedtls_ctr_drbg_context ctr_drbg;
    const char *pers = "test_suite_rsa";

    mbedtls_mpi_init(&N);
    mbedtls_mpi_init(&P);
    mbedtls_mpi_init(&Q);
    mbedtls_mpi_init(&D);
    mbedtls_mpi_init(&E);

    mbedtls_ctr_drbg_init(&ctr_drbg);
    mbedtls_entropy_init(&entropy);
    TEST_ASSERT(mbedtls_ctr_drbg_seed(&ctr_drbg, mbedtls_entropy_func, &entropy,
                                      (const unsigned char *)pers,
                                      strlen(pers)) == 0);

    if (have_N)
        TEST_ASSERT(mbedtls_test_read_mpi(&N, radix_N, input_N) == 0);

    if (have_P)
        TEST_ASSERT(mbedtls_test_read_mpi(&P, radix_P, input_P) == 0);

    if (have_Q)
        TEST_ASSERT(mbedtls_test_read_mpi(&Q, radix_Q, input_Q) == 0);

    if (have_D)
        TEST_ASSERT(mbedtls_test_read_mpi(&D, radix_D, input_D) == 0);

    if (have_E)
        TEST_ASSERT(mbedtls_test_read_mpi(&E, radix_E, input_E) == 0);

    TEST_ASSERT(mbedtls_rsa_validate_params(
                    have_N ? &N : NULL, have_P ? &P : NULL, have_Q ? &Q : NULL,
                    have_D ? &D : NULL, have_E ? &E : NULL,
                    prng ? mbedtls_ctr_drbg_random : NULL,
                    prng ? &ctr_drbg : NULL) == result);
exit:

    mbedtls_ctr_drbg_free(&ctr_drbg);
    mbedtls_entropy_free(&entropy);

    mbedtls_mpi_free(&N);
    mbedtls_mpi_free(&P);
    mbedtls_mpi_free(&Q);
    mbedtls_mpi_free(&D);
    mbedtls_mpi_free(&E);
}
/* END_CASE */

/* BEGIN_CASE depends_on:MBEDTLS_CTR_DRBG_C:MBEDTLS_ENTROPY_C */
void mbedtls_rsa_export_raw(data_t *input_N,
                            data_t *input_P,
                            data_t *input_Q,
                            data_t *input_D,
                            data_t *input_E,
                            int is_priv,
                            int successive)
{
    /* Exported buffers */
    unsigned char bufNe[256];
    unsigned char bufPe[128];
    unsigned char bufQe[128];
    unsigned char bufDe[256];
    unsigned char bufEe[1];

    mbedtls_rsa_context ctx;

    mbedtls_rsa_init(&ctx);

    /* Setup RSA context */
    TEST_ASSERT(mbedtls_rsa_import_raw(
                    &ctx, input_N->len ? input_N->x : NULL, input_N->len,
                    input_P->len ? input_P->x : NULL, input_P->len,
                    input_Q->len ? input_Q->x : NULL, input_Q->len,
                    input_D->len ? input_D->x : NULL, input_D->len,
                    input_E->len ? input_E->x : NULL, input_E->len) == 0);

    TEST_ASSERT(mbedtls_rsa_complete(&ctx) == 0);

    /*
     * Export parameters and compare to original ones.
     */

    /* N and E must always be present. */
    if (!successive) {
        TEST_ASSERT(mbedtls_rsa_export_raw(&ctx, bufNe, input_N->len, NULL, 0,
                                           NULL, 0, NULL, 0, bufEe,
                                           input_E->len) == 0);
    } else {
        TEST_ASSERT(mbedtls_rsa_export_raw(&ctx, bufNe, input_N->len, NULL, 0,
                                           NULL, 0, NULL, 0, NULL, 0) == 0);
        TEST_ASSERT(mbedtls_rsa_export_raw(&ctx, NULL, 0, NULL, 0, NULL, 0,
                                           NULL, 0, bufEe, input_E->len) == 0);
    }
    TEST_ASSERT(memcmp(input_N->x, bufNe, input_N->len) == 0);
    TEST_ASSERT(memcmp(input_E->x, bufEe, input_E->len) == 0);

    /* If we were providing enough information to setup a complete private
     * context, we expect to be able to export all core parameters. */

    if (is_priv) {
        if (!successive) {
            TEST_ASSERT(mbedtls_rsa_export_raw(
                            &ctx, NULL, 0, bufPe,
                            input_P->len ? input_P->len : sizeof(bufPe), bufQe,
                            input_Q->len ? input_Q->len : sizeof(bufQe), bufDe,
                            input_D->len ? input_D->len : sizeof(bufDe), NULL,
                            0) == 0);
        } else {
            TEST_ASSERT(mbedtls_rsa_export_raw(&ctx, NULL, 0, bufPe,
                                               input_P->len ? input_P->len :
                                                              sizeof(bufPe),
                                               NULL, 0, NULL, 0, NULL, 0) == 0);

            TEST_ASSERT(mbedtls_rsa_export_raw(&ctx, NULL, 0, NULL, 0, bufQe,
                                               input_Q->len ? input_Q->len :
                                                              sizeof(bufQe),
                                               NULL, 0, NULL, 0) == 0);

            TEST_ASSERT(mbedtls_rsa_export_raw(
                            &ctx, NULL, 0, NULL, 0, NULL, 0, bufDe,
                            input_D->len ? input_D->len : sizeof(bufDe), NULL,
                            0) == 0);
        }

        if (input_P->len)
            TEST_ASSERT(memcmp(input_P->x, bufPe, input_P->len) == 0);

        if (input_Q->len)
            TEST_ASSERT(memcmp(input_Q->x, bufQe, input_Q->len) == 0);

        if (input_D->len)
            TEST_ASSERT(memcmp(input_D->x, bufDe, input_D->len) == 0);
    }

exit:
    mbedtls_rsa_free(&ctx);
}
/* END_CASE */

/* BEGIN_CASE depends_on:MBEDTLS_CTR_DRBG_C:MBEDTLS_ENTROPY_C:ENTROPY_HAVE_STRONG */
void mbedtls_rsa_import_raw(data_t *input_N,
                            data_t *input_P,
                            data_t *input_Q,
                            data_t *input_D,
                            data_t *input_E,
                            int successive,
                            int is_priv,
                            int res_check,
                            int res_complete)
{
    /* Buffers used for encryption-decryption test */
    unsigned char *buf_orig = NULL;
    unsigned char *buf_enc = NULL;
    unsigned char *buf_dec = NULL;

    mbedtls_rsa_context ctx;
    mbedtls_entropy_context entropy;
    mbedtls_ctr_drbg_context ctr_drbg;

    const char *pers = "test_suite_rsa";

    mbedtls_ctr_drbg_init(&ctr_drbg);
    mbedtls_entropy_init(&entropy);
    mbedtls_rsa_init(&ctx);

    TEST_ASSERT(mbedtls_ctr_drbg_seed(&ctr_drbg, mbedtls_entropy_func, &entropy,
                                      (const unsigned char *)pers,
                                      strlen(pers)) == 0);

    if (!successive) {
        TEST_ASSERT(mbedtls_rsa_import_raw(
                        &ctx, (input_N->len > 0) ? input_N->x : NULL,
                        input_N->len, (input_P->len > 0) ? input_P->x : NULL,
                        input_P->len, (input_Q->len > 0) ? input_Q->x : NULL,
                        input_Q->len, (input_D->len > 0) ? input_D->x : NULL,
                        input_D->len, (input_E->len > 0) ? input_E->x : NULL,
                        input_E->len) == 0);
    } else {
        /* Import N, P, Q, D, E separately.
         * This should make no functional difference. */

        TEST_ASSERT(mbedtls_rsa_import_raw(
                        &ctx, (input_N->len > 0) ? input_N->x : NULL,
                        input_N->len, NULL, 0, NULL, 0, NULL, 0, NULL, 0) == 0);

        TEST_ASSERT(mbedtls_rsa_import_raw(
                        &ctx, NULL, 0, (input_P->len > 0) ? input_P->x : NULL,
                        input_P->len, NULL, 0, NULL, 0, NULL, 0) == 0);

        TEST_ASSERT(
            mbedtls_rsa_import_raw(&ctx, NULL, 0, NULL, 0,
                                   (input_Q->len > 0) ? input_Q->x : NULL,
                                   input_Q->len, NULL, 0, NULL, 0) == 0);

        TEST_ASSERT(
            mbedtls_rsa_import_raw(&ctx, NULL, 0, NULL, 0, NULL, 0,
                                   (input_D->len > 0) ? input_D->x : NULL,
                                   input_D->len, NULL, 0) == 0);

        TEST_ASSERT(
            mbedtls_rsa_import_raw(&ctx, NULL, 0, NULL, 0, NULL, 0, NULL, 0,
                                   (input_E->len > 0) ? input_E->x : NULL,
                                   input_E->len) == 0);
    }

    TEST_ASSERT(mbedtls_rsa_complete(&ctx) == res_complete);

    /* On expected success, perform some public and private
     * key operations to check if the key is working properly. */
    if (res_complete == 0) {
        if (is_priv)
            TEST_ASSERT(mbedtls_rsa_check_privkey(&ctx) == res_check);
        else
            TEST_ASSERT(mbedtls_rsa_check_pubkey(&ctx) == res_check);

        if (res_check != 0)
            goto exit;

        buf_orig = mbedtls_calloc(1, mbedtls_rsa_get_len(&ctx));
        buf_enc = mbedtls_calloc(1, mbedtls_rsa_get_len(&ctx));
        buf_dec = mbedtls_calloc(1, mbedtls_rsa_get_len(&ctx));
        if (buf_orig == NULL || buf_enc == NULL || buf_dec == NULL)
            goto exit;

        TEST_ASSERT(mbedtls_ctr_drbg_random(&ctr_drbg, buf_orig,
                                            mbedtls_rsa_get_len(&ctx)) == 0);

        /* Make sure the number we're generating is smaller than the modulus */
        buf_orig[0] = 0x00;

        TEST_ASSERT(mbedtls_rsa_public(&ctx, buf_orig, buf_enc) == 0);

        if (is_priv) {
            TEST_ASSERT(mbedtls_rsa_private(&ctx, mbedtls_ctr_drbg_random,
                                            &ctr_drbg, buf_enc, buf_dec) == 0);

            TEST_ASSERT(memcmp(buf_orig, buf_dec, mbedtls_rsa_get_len(&ctx)) ==
                        0);
        }
    }

exit:

    mbedtls_free(buf_orig);
    mbedtls_free(buf_enc);
    mbedtls_free(buf_dec);

    mbedtls_rsa_free(&ctx);

    mbedtls_ctr_drbg_free(&ctr_drbg);
    mbedtls_entropy_free(&entropy);
}
/* END_CASE */

/* BEGIN_CASE depends_on:MBEDTLS_SELF_TEST */
void rsa_selftest()
{
    TEST_ASSERT(mbedtls_rsa_self_test(1) == 0);
}
/* END_CASE */