Add int return values to MD5 function calls
The following function calls are being deprecated to introduce int
return values.
* mbedtls_md5()
* mbedtls_md5_starts()
* mbedtls_md5_update()
* mbedtls_md5_finish()
* mbedtls_md5_process()
The return codes can be used to return error values. This is important
when using hardware accelerators.
diff --git a/library/md5.c b/library/md5.c
index 5d972dc..dd046af 100644
--- a/library/md5.c
+++ b/library/md5.c
@@ -97,7 +97,7 @@
/*
* MD5 context setup
*/
-void mbedtls_md5_starts( mbedtls_md5_context *ctx )
+int mbedtls_md5_starts_ext( mbedtls_md5_context *ctx )
{
ctx->total[0] = 0;
ctx->total[1] = 0;
@@ -106,10 +106,13 @@
ctx->state[1] = 0xEFCDAB89;
ctx->state[2] = 0x98BADCFE;
ctx->state[3] = 0x10325476;
+
+ return( 0 );
}
#if !defined(MBEDTLS_MD5_PROCESS_ALT)
-void mbedtls_md5_process( mbedtls_md5_context *ctx, const unsigned char data[64] )
+int mbedtls_md5_process_ext( mbedtls_md5_context *ctx,
+ const unsigned char data[64] )
{
uint32_t X[16], A, B, C, D;
@@ -230,19 +233,24 @@
ctx->state[1] += B;
ctx->state[2] += C;
ctx->state[3] += D;
+
+ return( 0 );
}
#endif /* !MBEDTLS_MD5_PROCESS_ALT */
/*
* MD5 process buffer
*/
-void mbedtls_md5_update( mbedtls_md5_context *ctx, const unsigned char *input, size_t ilen )
+int mbedtls_md5_update_ext( mbedtls_md5_context *ctx,
+ const unsigned char *input,
+ size_t ilen )
{
+ int ret;
size_t fill;
uint32_t left;
if( ilen == 0 )
- return;
+ return( 0 );
left = ctx->total[0] & 0x3F;
fill = 64 - left;
@@ -256,7 +264,9 @@
if( left && ilen >= fill )
{
memcpy( (void *) (ctx->buffer + left), input, fill );
- mbedtls_md5_process( ctx, ctx->buffer );
+ if( ( ret = mbedtls_md5_process_ext( ctx, ctx->buffer ) ) != 0 )
+ return( ret );
+
input += fill;
ilen -= fill;
left = 0;
@@ -264,7 +274,9 @@
while( ilen >= 64 )
{
- mbedtls_md5_process( ctx, input );
+ if( ( ret = mbedtls_md5_process_ext( ctx, input ) ) != 0 )
+ return( ret );
+
input += 64;
ilen -= 64;
}
@@ -273,6 +285,8 @@
{
memcpy( (void *) (ctx->buffer + left), input, ilen );
}
+
+ return( 0 );
}
static const unsigned char md5_padding[64] =
@@ -286,8 +300,10 @@
/*
* MD5 final digest
*/
-void mbedtls_md5_finish( mbedtls_md5_context *ctx, unsigned char output[16] )
+int mbedtls_md5_finish_ext( mbedtls_md5_context *ctx,
+ unsigned char output[16] )
{
+ int ret;
uint32_t last, padn;
uint32_t high, low;
unsigned char msglen[8];
@@ -302,13 +318,18 @@
last = ctx->total[0] & 0x3F;
padn = ( last < 56 ) ? ( 56 - last ) : ( 120 - last );
- mbedtls_md5_update( ctx, md5_padding, padn );
- mbedtls_md5_update( ctx, msglen, 8 );
+ if( ( ret = mbedtls_md5_update_ext( ctx, md5_padding, padn ) ) != 0 )
+ return( ret );
+
+ if( ( ret = mbedtls_md5_update_ext( ctx, msglen, 8 ) ) != 0 )
+ return( ret );
PUT_UINT32_LE( ctx->state[0], output, 0 );
PUT_UINT32_LE( ctx->state[1], output, 4 );
PUT_UINT32_LE( ctx->state[2], output, 8 );
PUT_UINT32_LE( ctx->state[3], output, 12 );
+
+ return( 0 );
}
#endif /* !MBEDTLS_MD5_ALT */
@@ -316,15 +337,27 @@
/*
* output = MD5( input buffer )
*/
-void mbedtls_md5( const unsigned char *input, size_t ilen, unsigned char output[16] )
+int mbedtls_md5_ext( const unsigned char *input,
+ size_t ilen,
+ unsigned char output[16] )
{
+ int ret;
mbedtls_md5_context ctx;
mbedtls_md5_init( &ctx );
- mbedtls_md5_starts( &ctx );
- mbedtls_md5_update( &ctx, input, ilen );
- mbedtls_md5_finish( &ctx, output );
+
+ if( ( ret = mbedtls_md5_starts_ext( &ctx ) ) != 0 )
+ return( ret );
+
+ if( ( ret = mbedtls_md5_update_ext( &ctx, input, ilen ) ) != 0 )
+ return( ret );
+
+ if( ( ret = mbedtls_md5_finish_ext( &ctx, output ) ) != 0 )
+ return( ret );
+
mbedtls_md5_free( &ctx );
+
+ return( 0 );
}
#if defined(MBEDTLS_SELF_TEST)
@@ -379,15 +412,12 @@
if( verbose != 0 )
mbedtls_printf( " MD5 test #%d: ", i + 1 );
- mbedtls_md5( md5_test_buf[i], md5_test_buflen[i], md5sum );
+ if( mbedtls_md5_ext( md5_test_buf[i],
+ md5_test_buflen[i], md5sum ) != 0 )
+ goto fail;
if( memcmp( md5sum, md5_test_sum[i], 16 ) != 0 )
- {
- if( verbose != 0 )
- mbedtls_printf( "failed\n" );
-
- return( 1 );
- }
+ goto fail;
if( verbose != 0 )
mbedtls_printf( "passed\n" );
@@ -397,6 +427,12 @@
mbedtls_printf( "\n" );
return( 0 );
+
+fail:
+ if( verbose != 0 )
+ mbedtls_printf( "failed\n" );
+
+ return( 1 );
}
#endif /* MBEDTLS_SELF_TEST */
