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Zeroize heap buf on failure in pem.c

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This commit is contained in:
Andres Amaya Garcia 2017-06-26 11:44:54 +01:00
parent 1b7d6f8c03
commit 4f02a7bd6a
1 changed files with 3 additions and 0 deletions
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3
library/pem.c
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@ -341,6 +341,7 @@ int mbedtls_pem_read_buffer( mbedtls_pem_context *ctx, const char *header, const
( defined(MBEDTLS_DES_C) || defined(MBEDTLS_AES_C) ) ( defined(MBEDTLS_DES_C) || defined(MBEDTLS_AES_C) )
if( pwd == NULL ) if( pwd == NULL )
{ {
mbedtls_zeroize( buf, len );
mbedtls_free( buf ); mbedtls_free( buf );
return( MBEDTLS_ERR_PEM_PASSWORD_REQUIRED ); return( MBEDTLS_ERR_PEM_PASSWORD_REQUIRED );
} }
@ -369,10 +370,12 @@ int mbedtls_pem_read_buffer( mbedtls_pem_context *ctx, const char *header, const
*/ */
if( len <= 2 || buf[0] != 0x30 || buf[1] > 0x83 ) if( len <= 2 || buf[0] != 0x30 || buf[1] > 0x83 )
{ {
mbedtls_zeroize( buf, len );
mbedtls_free( buf ); mbedtls_free( buf );
return( MBEDTLS_ERR_PEM_PASSWORD_MISMATCH ); return( MBEDTLS_ERR_PEM_PASSWORD_MISMATCH );
} }
#else #else
mbedtls_zeroize( buf, len );
mbedtls_free( buf ); mbedtls_free( buf );
return( MBEDTLS_ERR_PEM_FEATURE_UNAVAILABLE ); return( MBEDTLS_ERR_PEM_FEATURE_UNAVAILABLE );
#endif /* MBEDTLS_MD5_C && MBEDTLS_CIPHER_MODE_CBC && #endif /* MBEDTLS_MD5_C && MBEDTLS_CIPHER_MODE_CBC &&