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Add countermeasure against cache-based lucky 13

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Manuel Pégourié-Gonnard 2015-04-29 01:35:48 +02:00
parent 9ce1bdc151
commit 47fede0d6d
2 changed files with 4 additions and 1 deletions
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3
library/ssl_tls.c
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@ -1825,7 +1825,8 @@ static int ssl_decrypt_buf( ssl_context *ssl )
ssl->in_msglen );
md_hmac_finish( &ssl->transform_in->md_ctx_dec,
ssl->in_msg + ssl->in_msglen );
for( j = 0; j < extra_run; j++ )
/* Call md_process at least once due to cache attacks */
for( j = 0; j < extra_run + 1; j++ )
md_process( &ssl->transform_in->md_ctx_dec, ssl->in_msg );
md_hmac_reset( &ssl->transform_in->md_ctx_dec );