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Merge remote-tracking branch 'public/pr/1902' into development

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Simon Butcher 2018-10-27 18:36:55 +01:00
commit a07d86e8af
8 changed files with 774 additions and 223 deletions
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713
tests/suites/test_suite_ctr_drbg.data
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168
tests/suites/test_suite_ctr_drbg.function
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@ -1,15 +1,97 @@
/* BEGIN_HEADER */
#include "mbedtls/entropy.h"
#include "mbedtls/ctr_drbg.h"
#include "string.h"
static int test_offset_idx;
/* Modes for ctr_drbg_validate */
enum reseed_mode
{
RESEED_NEVER, /* never reseed */
RESEED_FIRST, /* instantiate, reseed, generate, generate */
RESEED_SECOND, /* instantiate, generate, reseed, generate */
RESEED_ALWAYS /* prediction resistance, no explicit reseed */
};
static size_t test_offset_idx = 0;
static size_t test_max_idx = 0;
static int mbedtls_test_entropy_func( void *data, unsigned char *buf, size_t len )
{
const unsigned char *p = (unsigned char *) data;
if( test_offset_idx + len > test_max_idx )
return( MBEDTLS_ERR_ENTROPY_SOURCE_FAILED );
memcpy( buf, p + test_offset_idx, len );
test_offset_idx += len;
return( 0 );
}
static void ctr_drbg_validate_internal( int reseed_mode, data_t * nonce,
int entropy_len_arg, data_t * entropy,
data_t * reseed,
data_t * add1, data_t * add2,
data_t * result )
{
mbedtls_ctr_drbg_context ctx;
unsigned char buf[64];
size_t entropy_chunk_len = (size_t) entropy_len_arg;
TEST_ASSERT( entropy_chunk_len <= sizeof( buf ) );
test_offset_idx = 0;
mbedtls_ctr_drbg_init( &ctx );
test_max_idx = entropy->len;
/* CTR_DRBG_Instantiate(entropy[:entropy->len], nonce, perso, <ignored>)
* where nonce||perso = nonce[nonce->len] */
TEST_ASSERT( mbedtls_ctr_drbg_seed_entropy_len(
&ctx,
mbedtls_test_entropy_func, entropy->x,
nonce->x, nonce->len,
entropy_chunk_len ) == 0 );
if( reseed_mode == RESEED_ALWAYS )
mbedtls_ctr_drbg_set_prediction_resistance(
&ctx,
MBEDTLS_CTR_DRBG_PR_ON );
if( reseed_mode == RESEED_FIRST )
{
/* CTR_DRBG_Reseed(entropy[idx:idx+entropy->len],
* reseed[:reseed->len]) */
TEST_ASSERT( mbedtls_ctr_drbg_reseed(
&ctx,
reseed->x, reseed->len ) == 0 );
}
/* CTR_DRBG_Generate(result->len * 8 bits, add1[:add1->len]) -> buf */
/* Then reseed if prediction resistance is enabled. */
TEST_ASSERT( mbedtls_ctr_drbg_random_with_add(
&ctx,
buf, result->len,
add1->x, add1->len ) == 0 );
if( reseed_mode == RESEED_SECOND )
{
/* CTR_DRBG_Reseed(entropy[idx:idx+entropy->len],
* reseed[:reseed->len]) */
TEST_ASSERT( mbedtls_ctr_drbg_reseed(
&ctx,
reseed->x, reseed->len ) == 0 );
}
/* CTR_DRBG_Generate(result->len * 8 bits, add2->x[:add2->len]) -> buf */
/* Then reseed if prediction resistance is enabled. */
TEST_ASSERT( mbedtls_ctr_drbg_random_with_add(
&ctx,
buf, result->len,
add2->x, add2->len ) == 0 );
TEST_ASSERT( memcmp( buf, result->x, result->len ) == 0 );
exit:
mbedtls_ctr_drbg_free( &ctx );
}
/* END_HEADER */
/* BEGIN_DEPENDENCIES
@ -18,7 +100,7 @@ static int mbedtls_test_entropy_func( void *data, unsigned char *buf, size_t len
*/
/* BEGIN_CASE */
void ctr_drbg_special_behaviours( )
void ctr_drbg_special_behaviours( )
{
mbedtls_ctr_drbg_context ctx;
unsigned char output[512];
@ -50,54 +132,63 @@ exit:
}
/* END_CASE */
/* BEGIN_CASE */
void ctr_drbg_validate_no_reseed( data_t * add_init, data_t * entropy,
data_t * add1, data_t * add2,
data_t * result_string )
{
data_t empty = { 0, 0 };
ctr_drbg_validate_internal( RESEED_NEVER, add_init,
entropy->len, entropy,
&empty, add1, add2,
result_string );
goto exit; // goto is needed to avoid warning ( no test assertions in func)
}
/* END_CASE */
/* BEGIN_CASE */
void ctr_drbg_validate_pr( data_t * add_init, data_t * entropy,
data_t * add1, data_t * add2,
data_t * result_str )
data_t * result_string )
{
mbedtls_ctr_drbg_context ctx;
unsigned char buf[512];
mbedtls_ctr_drbg_init( &ctx );
test_offset_idx = 0;
TEST_ASSERT( mbedtls_ctr_drbg_seed_entropy_len( &ctx, mbedtls_test_entropy_func, entropy->x, add_init->x, add_init->len, 32 ) == 0 );
mbedtls_ctr_drbg_set_prediction_resistance( &ctx, MBEDTLS_CTR_DRBG_PR_ON );
TEST_ASSERT( mbedtls_ctr_drbg_random_with_add( &ctx, buf, 16, add1->x, add1->len ) == 0 );
TEST_ASSERT( mbedtls_ctr_drbg_random_with_add( &ctx, buf, 16, add2->x, add2->len ) == 0 );
TEST_ASSERT( hexcmp( buf, result_str->x, 16, result_str->len ) == 0 );
exit:
mbedtls_ctr_drbg_free( &ctx );
data_t empty = { 0, 0 };
ctr_drbg_validate_internal( RESEED_ALWAYS, add_init,
entropy->len / 3, entropy,
&empty, add1, add2,
result_string );
goto exit; // goto is needed to avoid warning ( no test assertions in func)
}
/* END_CASE */
/* BEGIN_CASE */
void ctr_drbg_validate_nopr( data_t * add_init, data_t * entropy,
void ctr_drbg_validate_reseed_between( data_t * add_init, data_t * entropy,
data_t * add1, data_t * add_reseed,
data_t * add2, data_t * result_str )
data_t * add2, data_t * result_string )
{
mbedtls_ctr_drbg_context ctx;
unsigned char buf[512];
mbedtls_ctr_drbg_init( &ctx );
test_offset_idx = 0;
TEST_ASSERT( mbedtls_ctr_drbg_seed_entropy_len( &ctx, mbedtls_test_entropy_func, entropy->x, add_init->x, add_init->len, 32 ) == 0 );
TEST_ASSERT( mbedtls_ctr_drbg_random_with_add( &ctx, buf, 16, add1->x, add1->len ) == 0 );
TEST_ASSERT( mbedtls_ctr_drbg_reseed( &ctx, add_reseed->x, add_reseed->len ) == 0 );
TEST_ASSERT( mbedtls_ctr_drbg_random_with_add( &ctx, buf, 16, add2->x, add2->len ) == 0 );
TEST_ASSERT( hexcmp( buf, result_str->x, 16, result_str->len ) == 0 );
exit:
mbedtls_ctr_drbg_free( &ctx );
ctr_drbg_validate_internal( RESEED_SECOND, add_init,
entropy->len / 2, entropy,
add_reseed, add1, add2,
result_string );
goto exit; // goto is needed to avoid warning ( no test assertions in func)
}
/* END_CASE */
/* BEGIN_CASE */
void ctr_drbg_validate_reseed_first( data_t * add_init, data_t * entropy,
data_t * add1, data_t * add_reseed,
data_t * add2, data_t * result_string )
{
ctr_drbg_validate_internal( RESEED_FIRST, add_init,
entropy->len / 2, entropy,
add_reseed, add1, add2,
result_string );
goto exit; // goto is needed to avoid warning ( no test assertions in func)
}
/* END_CASE */
/* BEGIN_CASE */
void ctr_drbg_entropy_usage( )
{
@ -106,10 +197,11 @@ void ctr_drbg_entropy_usage( )
unsigned char entropy[1024];
mbedtls_ctr_drbg_context ctx;
size_t i, reps = 10;
int last_idx;
size_t last_idx;
mbedtls_ctr_drbg_init( &ctx );
test_offset_idx = 0;
test_max_idx = sizeof( entropy );
memset( entropy, 0, sizeof( entropy ) );
memset( out, 0, sizeof( out ) );
memset( add, 0, sizeof( add ) );