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Add missing calls to _free() in md_wrap

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We can't just assume xxx_free() will only zeroize, because of alternative
implementations
This commit is contained in:
Manuel Pégourié-Gonnard 2015-07-06 11:27:12 +02:00
parent a6dbddce0c
commit 71d296a15d
1 changed files with 5 additions and 10 deletions
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15
library/md_wrap.c
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@ -70,11 +70,6 @@
#define mbedtls_free free
#endif
/* Implementation that should never be optimized out by the compiler */
static void mbedtls_zeroize( void *v, size_t n ) {
volatile unsigned char *p = v; while( n-- ) *p++ = 0;
}
#if defined(MBEDTLS_MD2_C)
static void md2_starts_wrap( void *ctx )
@ -105,7 +100,7 @@ static void *md2_ctx_alloc( void )
static void md2_ctx_free( void *ctx )
{
mbedtls_zeroize( ctx, sizeof( mbedtls_md2_context ) );
mbedtls_md2_free( (mbedtls_md2_context *) ctx );
mbedtls_free( ctx );
}
@ -162,7 +157,7 @@ static void *md4_ctx_alloc( void )
static void md4_ctx_free( void *ctx )
{
mbedtls_zeroize( ctx, sizeof( mbedtls_md4_context ) );
mbedtls_md4_free( (mbedtls_md4_context *) ctx );
mbedtls_free( ctx );
}
@ -217,7 +212,7 @@ static void *md5_ctx_alloc( void )
static void md5_ctx_free( void *ctx )
{
mbedtls_zeroize( ctx, sizeof( mbedtls_md5_context ) );
mbedtls_md5_free( (mbedtls_md5_context *) ctx );
mbedtls_free( ctx );
}
@ -391,7 +386,7 @@ static void *sha224_ctx_alloc( void )
static void sha224_ctx_free( void *ctx )
{
mbedtls_zeroize( ctx, sizeof( mbedtls_sha256_context ) );
mbedtls_sha256_free( (mbedtls_sha256_context *) ctx );
mbedtls_free( ctx );
}
@ -477,7 +472,7 @@ static void *sha384_ctx_alloc( void )
static void sha384_ctx_free( void *ctx )
{
mbedtls_zeroize( ctx, sizeof( mbedtls_sha512_context ) );
mbedtls_sha512_free( (mbedtls_sha512_context *) ctx );
mbedtls_free( ctx );
}