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Add a concept of entropy source strength.

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The main goal is, we want and error if cycle counter is the only source.
This commit is contained in:
Manuel Pégourié-Gonnard 2015-06-19 10:26:32 +02:00
parent 3f77dfbd52
commit 7580ba475d
5 changed files with 47 additions and 19 deletions
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13
tests/suites/test_suite_entropy.function
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@ -68,9 +68,11 @@ void entropy_too_many_sources( )
* since we don't know how many sources were automatically added.
*/
for( i = 0; i < MBEDTLS_ENTROPY_MAX_SOURCES; i++ )
(void) mbedtls_entropy_add_source( &ctx, entropy_dummy_source, NULL, 16 );
(void) mbedtls_entropy_add_source( &ctx, entropy_dummy_source, NULL,
16, MBEDTLS_ENTROPY_SOURCE_WEAK );
TEST_ASSERT( mbedtls_entropy_add_source( &ctx, entropy_dummy_source, NULL, 16 )
TEST_ASSERT( mbedtls_entropy_add_source( &ctx, entropy_dummy_source, NULL,
16, MBEDTLS_ENTROPY_SOURCE_WEAK )
== MBEDTLS_ERR_ENTROPY_MAX_SOURCES );
exit:
@ -116,7 +118,9 @@ void entropy_source_fail( char *path )
mbedtls_entropy_init( &ctx );
TEST_ASSERT( mbedtls_entropy_add_source( &ctx, entropy_dummy_source, &fail, 16 )
TEST_ASSERT( mbedtls_entropy_add_source( &ctx, entropy_dummy_source,
&fail, 16,
MBEDTLS_ENTROPY_SOURCE_WEAK )
== 0 );
TEST_ASSERT( mbedtls_entropy_func( &ctx, buf, sizeof( buf ) )
@ -147,7 +151,8 @@ void entropy_threshold( int threshold, int chunk_size, int result )
mbedtls_entropy_init( &ctx );
TEST_ASSERT( mbedtls_entropy_add_source( &ctx, entropy_dummy_source,
&chunk_size, threshold ) == 0 );
&chunk_size, threshold,
MBEDTLS_ENTROPY_SOURCE_WEAK ) == 0 );
entropy_dummy_calls = 0;
ret = mbedtls_entropy_func( &ctx, buf, sizeof( buf ) );