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- Added option to prevent default entropy sources from loading (POLARSSL_NO_DEFAULT_ENTROPY_SOURCES)

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This commit is contained in:
Paul Bakker
2011-12-15 20:11:16 +00:00
parent fb3a83f9e3
commit 43655f46b0
5 changed files with 26 additions and 3 deletions
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9
library/entropy.c
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@ -41,7 +41,11 @@ void entropy_init( entropy_context *ctx )
memset( ctx, 0, sizeof(entropy_context) );
sha4_starts( &ctx->accumulator, 0 );
#if defined(POLARSSL_HAVEGE_C)
havege_init( &ctx->havege_data );
#endif
#if !defined(POLARSSL_NO_DEFAULT_ENTROPY_SOURCES)
#if !defined(POLARSSL_NO_PLATFORM_ENTROPY)
entropy_add_source( ctx, platform_entropy_poll, NULL,
ENTROPY_MIN_PLATFORM );
@ -50,10 +54,10 @@ void entropy_init( entropy_context *ctx )
entropy_add_source( ctx, hardclock_poll, NULL, ENTROPY_MIN_HARDCLOCK );
#endif
#if defined(POLARSSL_HAVEGE_C)
havege_init( &ctx->havege_data );
entropy_add_source( ctx, havege_poll, &ctx->havege_data,
ENTROPY_MIN_HAVEGE );
#endif
#endif /* POLARSSL_NO_DEFAULT_ENTROPY_SOURCES */
}
int entropy_add_source( entropy_context *ctx,
@ -117,6 +121,9 @@ int entropy_gather( entropy_context *ctx )
unsigned char buf[ENTROPY_MAX_GATHER];
size_t olen;
if( ctx->source_count == 0 )
return( POLARSSL_ERR_ENTROPY_NO_SOURCES_DEFINED );
/*
* Run through our entropy sources
*/