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Introduce polarssl_zeroize() instead of memset() for zeroization

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This commit is contained in:
Paul Bakker 2014-06-13 17:20:13 +02:00
parent bbcb1ce703
commit 3461772559
36 changed files with 325 additions and 129 deletions
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9
library/ccm.c
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@ -42,6 +42,11 @@
#include "polarssl/ccm.h"
/* Implementation that should never be optimized out by the compiler */
static void polarssl_zeroize( void *v, size_t n ) {
volatile unsigned char *p = v; while( n-- ) *p++ = 0;
}
#define CCM_ENCRYPT 0
#define CCM_DECRYPT 1
@ -81,7 +86,7 @@ int ccm_init( ccm_context *ctx, cipher_id_t cipher,
void ccm_free( ccm_context *ctx )
{
(void) cipher_free_ctx( &ctx->cipher_ctx );
memset( ctx, 0, sizeof( ccm_context ) );
polarssl_zeroize( ctx, sizeof( ccm_context ) );
}
/*
@ -320,7 +325,7 @@ int ccm_auth_decrypt( ccm_context *ctx, size_t length,
if( diff != 0 )
{
memset( output, 0, length );
polarssl_zeroize( output, length );
return( POLARSSL_ERR_CCM_AUTH_FAILED );
}