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/* BEGIN_HEADER */
/* Test random generation as a whole. */
#include "mbedtls/bignum.h"
#include "mbedtls/ctr_drbg.h"
#include "mbedtls/ecdsa.h"
#include "mbedtls/entropy.h"
#include "mbedtls/hmac_drbg.h"
#include "mbedtls/psa_util.h"
#include "psa/crypto.h"
/* How many bytes to generate in each test case for repeated generation.
* This must be high enough that the probability of generating the same
* output twice is infinitesimal, but low enough that random generators
* are willing to deliver that much. */
#define OUTPUT_SIZE 32
/* END_HEADER */
/* BEGIN_CASE depends_on:MBEDTLS_ENTROPY_C:!MBEDTLS_TEST_NULL_ENTROPY:MBEDTLS_CTR_DRBG_C */
void random_twice_with_ctr_drbg()
{
mbedtls_entropy_context entropy;
mbedtls_ctr_drbg_context drbg;
unsigned char output1[OUTPUT_SIZE];
unsigned char output2[OUTPUT_SIZE];
/* First round */
mbedtls_entropy_init(&entropy);
mbedtls_ctr_drbg_init(&drbg);
TEST_EQUAL(0, mbedtls_ctr_drbg_seed(&drbg,
mbedtls_entropy_func, &entropy,
NULL, 0));
TEST_EQUAL(0, mbedtls_ctr_drbg_random(&drbg,
output1, sizeof(output1)));
mbedtls_ctr_drbg_free(&drbg);
mbedtls_entropy_free(&entropy);
/* Second round */
mbedtls_entropy_init(&entropy);
mbedtls_ctr_drbg_init(&drbg);
TEST_EQUAL(0, mbedtls_ctr_drbg_seed(&drbg,
mbedtls_entropy_func, &entropy,
NULL, 0));
TEST_EQUAL(0, mbedtls_ctr_drbg_random(&drbg,
output2, sizeof(output2)));
mbedtls_ctr_drbg_free(&drbg);
mbedtls_entropy_free(&entropy);
/* The two rounds must generate different random data. */
TEST_ASSERT(memcmp(output1, output2, OUTPUT_SIZE) != 0);
exit:
mbedtls_ctr_drbg_free(&drbg);
mbedtls_entropy_free(&entropy);
}
/* END_CASE */
/* BEGIN_CASE depends_on:MBEDTLS_ENTROPY_C:!MBEDTLS_TEST_NULL_ENTROPY:MBEDTLS_HMAC_DRBG_C */
void random_twice_with_hmac_drbg(int md_type)
{
mbedtls_entropy_context entropy;
mbedtls_hmac_drbg_context drbg;
unsigned char output1[OUTPUT_SIZE];
unsigned char output2[OUTPUT_SIZE];
const mbedtls_md_info_t *md_info = mbedtls_md_info_from_type(md_type);
/* First round */
mbedtls_entropy_init(&entropy);
mbedtls_hmac_drbg_init(&drbg);
TEST_EQUAL(0, mbedtls_hmac_drbg_seed(&drbg, md_info,
mbedtls_entropy_func, &entropy,
NULL, 0));
TEST_EQUAL(0, mbedtls_hmac_drbg_random(&drbg,
output1, sizeof(output1)));
mbedtls_hmac_drbg_free(&drbg);
mbedtls_entropy_free(&entropy);
/* Second round */
mbedtls_entropy_init(&entropy);
mbedtls_hmac_drbg_init(&drbg);
TEST_EQUAL(0, mbedtls_hmac_drbg_seed(&drbg, md_info,
mbedtls_entropy_func, &entropy,
NULL, 0));
TEST_EQUAL(0, mbedtls_hmac_drbg_random(&drbg,
output2, sizeof(output2)));
mbedtls_hmac_drbg_free(&drbg);
mbedtls_entropy_free(&entropy);
/* The two rounds must generate different random data. */
TEST_ASSERT(memcmp(output1, output2, OUTPUT_SIZE) != 0);
exit:
mbedtls_hmac_drbg_free(&drbg);
mbedtls_entropy_free(&entropy);
}
/* END_CASE */
/* BEGIN_CASE depends_on:MBEDTLS_PSA_CRYPTO_C:!MBEDTLS_TEST_NULL_ENTROPY:!MBEDTLS_PSA_CRYPTO_EXTERNAL_RNG */
void random_twice_with_psa_from_classic()
{
unsigned char output1[OUTPUT_SIZE];
unsigned char output2[OUTPUT_SIZE];
/* First round */
PSA_ASSERT(psa_crypto_init());
TEST_EQUAL(0, mbedtls_psa_get_random(MBEDTLS_PSA_RANDOM_STATE,
output1, sizeof(output1)));
PSA_DONE();
/* Second round */
PSA_ASSERT(psa_crypto_init());
TEST_EQUAL(0, mbedtls_psa_get_random(MBEDTLS_PSA_RANDOM_STATE,
output2, sizeof(output2)));
PSA_DONE();
/* The two rounds must generate different random data. */
TEST_ASSERT(memcmp(output1, output2, OUTPUT_SIZE) != 0);
exit:
PSA_DONE();
}
/* END_CASE */
/* BEGIN_CASE depends_on:MBEDTLS_PSA_CRYPTO_C:!MBEDTLS_TEST_NULL_ENTROPY:!MBEDTLS_PSA_CRYPTO_EXTERNAL_RNG */
void random_twice_with_psa_from_psa()
{
unsigned char output1[OUTPUT_SIZE];
unsigned char output2[OUTPUT_SIZE];
/* First round */
PSA_ASSERT(psa_crypto_init());
PSA_ASSERT(psa_generate_random(output1, sizeof(output1)));
PSA_DONE();
/* Second round */
PSA_ASSERT(psa_crypto_init());
PSA_ASSERT(psa_generate_random(output2, sizeof(output2)));
PSA_DONE();
/* The two rounds must generate different random data. */
TEST_ASSERT(memcmp(output1, output2, OUTPUT_SIZE) != 0);
exit:
PSA_DONE();
}
/* END_CASE */
/* BEGIN_CASE depends_on:MBEDTLS_PSA_CRYPTO_C */
void mbedtls_psa_get_random_no_init()
{
unsigned char output[1];
TEST_ASSERT(mbedtls_psa_get_random(MBEDTLS_PSA_RANDOM_STATE,
output, sizeof(output)) != 0);
}
/* END_CASE */
/* BEGIN_CASE depends_on:MBEDTLS_PSA_CRYPTO_C */
void mbedtls_psa_get_random_length(int n)
{
unsigned char *output = NULL;
PSA_ASSERT(psa_crypto_init());
ASSERT_ALLOC(output, n);
TEST_EQUAL(0, mbedtls_psa_get_random(MBEDTLS_PSA_RANDOM_STATE,
output, n));
exit:
mbedtls_free(output);
PSA_DONE();
}
/* END_CASE */
/* BEGIN_CASE depends_on:MBEDTLS_PSA_CRYPTO_C:MBEDTLS_ECDSA_C */
void mbedtls_psa_get_random_ecdsa_sign(int curve)
{
mbedtls_ecp_group grp;
mbedtls_mpi d, r, s;
unsigned char buf[] = "This is not a hash.";
mbedtls_ecp_group_init(&grp);
mbedtls_mpi_init(&d);
mbedtls_mpi_init(&r);
mbedtls_mpi_init(&s);
TEST_EQUAL(0, mbedtls_mpi_lset(&d, 123456789));
TEST_EQUAL(0, mbedtls_ecp_group_load(&grp, curve));
PSA_ASSERT(psa_crypto_init());
TEST_EQUAL(0, mbedtls_ecdsa_sign(&grp, &r, &s, &d,
buf, sizeof(buf),
mbedtls_psa_get_random,
MBEDTLS_PSA_RANDOM_STATE));
exit:
mbedtls_mpi_free(&d);
mbedtls_mpi_free(&r);
mbedtls_mpi_free(&s);
mbedtls_ecp_group_free(&grp);
PSA_DONE();
}
/* END_CASE */
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