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- Added internal ctr_drbg_init_entropy_len() to allow NIST determined entropy tests to work

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This commit is contained in:
Paul Bakker 2011-12-10 21:42:49 +00:00
parent bd4a9d0cda
commit 18d32911c0
2 changed files with 29 additions and 5 deletions
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22
library/ctr_drbg.c
View File

@ -38,11 +38,17 @@
#include <stdio.h> #include <stdio.h>
#endif #endif
int ctr_drbg_init( ctr_drbg_context *ctx, /*
* Non-public function wrapped by ctr_crbg_init(). Necessary to allow NIST
* tests to succeed (which require known length fixed entropy)
*/
int ctr_drbg_init_entropy_len(
ctr_drbg_context *ctx,
int (*f_entropy)(void *, unsigned char *, size_t), int (*f_entropy)(void *, unsigned char *, size_t),
void *p_entropy, void *p_entropy,
const unsigned char *custom, const unsigned char *custom,
size_t len ) size_t len,
size_t entropy_len )
{ {
int ret; int ret;
unsigned char key[CTR_DRBG_KEYSIZE]; unsigned char key[CTR_DRBG_KEYSIZE];
@ -53,7 +59,7 @@ int ctr_drbg_init( ctr_drbg_context *ctx,
ctx->f_entropy = f_entropy; ctx->f_entropy = f_entropy;
ctx->p_entropy = p_entropy; ctx->p_entropy = p_entropy;
ctx->entropy_len = CTR_DRBG_ENTROPY_LEN; ctx->entropy_len = entropy_len;
ctx->reseed_interval = CTR_DRBG_RESEED_INTERVAL; ctx->reseed_interval = CTR_DRBG_RESEED_INTERVAL;
/* /*
@ -67,6 +73,16 @@ int ctr_drbg_init( ctr_drbg_context *ctx,
return( 0 ); return( 0 );
} }
int ctr_drbg_init( ctr_drbg_context *ctx,
int (*f_entropy)(void *, unsigned char *, size_t),
void *p_entropy,
const unsigned char *custom,
size_t len )
{
return( ctr_drbg_init_entropy_len( ctx, f_entropy, p_entropy, custom, len,
CTR_DRBG_ENTROPY_LEN ) );
}
void ctr_drbg_set_prediction_resistance( ctr_drbg_context *ctx, int resistance ) void ctr_drbg_set_prediction_resistance( ctr_drbg_context *ctx, int resistance )
{ {
ctx->prediction_resistance = resistance; ctx->prediction_resistance = resistance;

12
tests/suites/test_suite_ctr_drbg.function
View File

@ -8,6 +8,14 @@ int entropy_func( void *p, unsigned char *buf, size_t len )
test_offset += 32; test_offset += 32;
return( 0 ); return( 0 );
} }
int ctr_drbg_init_entropy_len(
ctr_drbg_context *ctx,
int (*f_entropy)(void *, unsigned char *, size_t),
void *p_entropy,
const unsigned char *custom,
size_t len,
size_t entropy_len );
END_HEADER END_HEADER
BEGIN_DEPENDENCIES BEGIN_DEPENDENCIES
@ -34,7 +42,7 @@ ctr_drbg_validate_pr:add_init_string:entropy_string:add1_string:add2_string:resu
add2_len = unhexify( add2, {add2_string} ); add2_len = unhexify( add2, {add2_string} );
test_offset = 0; test_offset = 0;
TEST_ASSERT( ctr_drbg_init( &ctx, entropy_func, entropy, add_init, add_init_len ) == 0 ); TEST_ASSERT( ctr_drbg_init_entropy_len( &ctx, entropy_func, entropy, add_init, add_init_len, 32 ) == 0 );
ctr_drbg_set_prediction_resistance( &ctx, CTR_DRBG_PR_ON ); ctr_drbg_set_prediction_resistance( &ctx, CTR_DRBG_PR_ON );
TEST_ASSERT( ctr_drbg_random_with_add( &ctx, buf, 16, add1, add1_len ) == 0 ); TEST_ASSERT( ctr_drbg_random_with_add( &ctx, buf, 16, add1, add1_len ) == 0 );
@ -66,7 +74,7 @@ ctr_drbg_validate_nopr:add_init_string:entropy_string:add1_string:add_reseed_str
add2_len = unhexify( add2, {add2_string} ); add2_len = unhexify( add2, {add2_string} );
test_offset = 0; test_offset = 0;
TEST_ASSERT( ctr_drbg_init( &ctx, entropy_func, entropy, add_init, add_init_len ) == 0 ); TEST_ASSERT( ctr_drbg_init_entropy_len( &ctx, entropy_func, entropy, add_init, add_init_len, 32 ) == 0 );
TEST_ASSERT( ctr_drbg_random_with_add( &ctx, buf, 16, add1, add1_len ) == 0 ); TEST_ASSERT( ctr_drbg_random_with_add( &ctx, buf, 16, add1, add1_len ) == 0 );
TEST_ASSERT( ctr_drbg_reseed( &ctx, add_reseed, add_reseed_len ) == 0 ); TEST_ASSERT( ctr_drbg_reseed( &ctx, add_reseed, add_reseed_len ) == 0 );