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https://github.com/yuzu-emu/mbedtls.git
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Force cleanup before return
Signed-off-by: gabor-mezei-arm <gabor.mezei@arm.com>
This commit is contained in:
parent
461c5a89df
commit
77d9401705
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@ -252,7 +252,7 @@ int mbedtls_pkcs5_pbkdf2_hmac( mbedtls_md_context_t *ctx, const unsigned char *p
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unsigned int iteration_count,
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uint32_t key_length, unsigned char *output )
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{
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int ret, j;
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int ret = 0, j;
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unsigned int i;
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unsigned char md1[MBEDTLS_MD_MAX_SIZE];
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unsigned char work[MBEDTLS_MD_MAX_SIZE];
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@ -274,16 +274,16 @@ int mbedtls_pkcs5_pbkdf2_hmac( mbedtls_md_context_t *ctx, const unsigned char *p
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// U1 ends up in work
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//
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if( ( ret = mbedtls_md_hmac_starts( ctx, password, plen ) ) != 0 )
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return( ret );
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goto cleanup;
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if( ( ret = mbedtls_md_hmac_update( ctx, salt, slen ) ) != 0 )
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return( ret );
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goto cleanup;
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if( ( ret = mbedtls_md_hmac_update( ctx, counter, 4 ) ) != 0 )
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return( ret );
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goto cleanup;
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if( ( ret = mbedtls_md_hmac_finish( ctx, work ) ) != 0 )
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return( ret );
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goto cleanup;
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memcpy( md1, work, md_size );
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@ -292,13 +292,13 @@ int mbedtls_pkcs5_pbkdf2_hmac( mbedtls_md_context_t *ctx, const unsigned char *p
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// U2 ends up in md1
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//
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if( ( ret = mbedtls_md_hmac_starts( ctx, password, plen ) ) != 0 )
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return( ret );
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goto cleanup;
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if( ( ret = mbedtls_md_hmac_update( ctx, md1, md_size ) ) != 0 )
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return( ret );
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goto cleanup;
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if( ( ret = mbedtls_md_hmac_finish( ctx, md1 ) ) != 0 )
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return( ret );
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goto cleanup;
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// U1 xor U2
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//
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@ -317,11 +317,12 @@ int mbedtls_pkcs5_pbkdf2_hmac( mbedtls_md_context_t *ctx, const unsigned char *p
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break;
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}
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cleanup:
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/* Zeroise buffers to clear sensitive data from memory. */
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mbedtls_zeroize( work, MBEDTLS_MD_MAX_SIZE );
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mbedtls_zeroize( md1, MBEDTLS_MD_MAX_SIZE );
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return( 0 );
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return( ret );
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}
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#if defined(MBEDTLS_SELF_TEST)
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