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ctr_drbg tests: new validation function that doesn't reseed

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This is one of the test scenarios from the CAVP test vectors.
This commit is contained in:
Gilles Peskine 2018-08-03 20:24:54 +02:00 committed by Nir Sonnenschein
parent ef0624f791
commit 4c78665ccd
1 changed files with 39 additions and 2 deletions
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41
tests/suites/test_suite_ctr_drbg.function
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@ -55,8 +55,45 @@ exit:
/* END_CASE */ /* END_CASE */
/* BEGIN_CASE */ /* BEGIN_CASE */
void ctr_drbg_validate_pr( data_t * add_init, data_t * entropy,
data_t * add1, data_t * add2, /* BEGIN_CASE */
void ctr_drbg_validate_no_reseed( char *add_init_string, char *entropy_string,
char *add1_string, char *add2_string,
char *result_string )
{
unsigned char entropy[512];
unsigned char add_init[512];
unsigned char add1[512];
unsigned char add2[512];
mbedtls_ctr_drbg_context ctx;
unsigned char buf[512];
unsigned char result[512];
size_t entropy_len, add_init_len, add1_len, add2_len, result_len;
mbedtls_ctr_drbg_init( &ctx );
entropy_len = unhexify( entropy, entropy_string );
add_init_len = unhexify( add_init, add_init_string );
add1_len = unhexify( add1, add1_string );
add2_len = unhexify( add2, add2_string );
result_len = unhexify( result, result_string );
test_offset_idx = 0;
test_max_idx = entropy_len;
/* CTR_DRBG_Instantiate(entropy[:entropy_len], nonce, perso, <ignored>)
* where nonce||perso = add_init[add_init_len] */
TEST_ASSERT( mbedtls_ctr_drbg_seed_entropy_len( &ctx, mbedtls_test_entropy_func, entropy, add_init, add_init_len, entropy_len ) == 0 );
/* CTR_DRBG_Generate(result_len * 8 bits, add1[:add1_len]) -> buf */
TEST_ASSERT( mbedtls_ctr_drbg_random_with_add( &ctx, buf, result_len, add1, add1_len ) == 0 );
/* CTR_DRBG_Generate(result_len * 8 bits, add2[:add2_len]) -> buf */
TEST_ASSERT( mbedtls_ctr_drbg_random_with_add( &ctx, buf, result_len, add2, add2_len ) == 0 );
TEST_ASSERT( memcmp( buf, result, result_len ) == 0 );
exit:
mbedtls_ctr_drbg_free( &ctx );
}
/* END_CASE */
char *result_string ) char *result_string )
{ {
mbedtls_ctr_drbg_context ctx; mbedtls_ctr_drbg_context ctx;