- Added generic message digest wrapper for integration with OpenVPN (donated by Fox-IT)
diff --git a/library/md.c b/library/md.c
new file mode 100644
index 0000000..c36cd4e
--- /dev/null
+++ b/library/md.c
@@ -0,0 +1,242 @@
+/**
+ * \file md.c
+ *
+ * \brief Generic message digest wrapper for PolarSSL
+ *
+ * \author Adriaan de Jong <dejong@fox-it.com>
+ *
+ * Copyright (C) 2006-2010, Brainspark B.V.
+ *
+ * This file is part of PolarSSL (http://www.polarssl.org)
+ * Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
+ *
+ * All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "polarssl/config.h"
+
+#if defined(POLARSSL_MD_C)
+
+#include "polarssl/md.h"
+#include "polarssl/md_wrap.h"
+
+#include <string.h>
+#include <stdlib.h>
+
+const md_info_t *md_info_from_string( const char *md_name )
+{
+ if( NULL == md_name )
+ return NULL;
+
+ /* Get the appropriate digest information */
+#if defined(POLARSSL_MD2_C)
+ if( !strcasecmp( "MD2", md_name ) )
+ return md_info_from_type( POLARSSL_MD_MD2 );
+#endif
+#if defined(POLARSSL_MD4_C)
+ if( !strcasecmp( "MD4", md_name ) )
+ return md_info_from_type( POLARSSL_MD_MD4 );
+#endif
+#if defined(POLARSSL_MD5_C)
+ if( !strcasecmp( "MD5", md_name ) )
+ return md_info_from_type( POLARSSL_MD_MD5 );
+#endif
+#if defined(POLARSSL_SHA1_C)
+ if( !strcasecmp( "SHA1", md_name ) || !strcasecmp( "SHA", md_name ) )
+ return md_info_from_type( POLARSSL_MD_SHA1 );
+#endif
+#if defined(POLARSSL_SHA2_C)
+ if( !strcasecmp( "SHA224", md_name ) )
+ return md_info_from_type( POLARSSL_MD_SHA224 );
+ if( !strcasecmp( "SHA256", md_name ) )
+ return md_info_from_type( POLARSSL_MD_SHA256 );
+#endif
+#if defined(POLARSSL_SHA4_C)
+ if( !strcasecmp( "SHA384", md_name ) )
+ return md_info_from_type( POLARSSL_MD_SHA384 );
+ if( !strcasecmp( "SHA512", md_name ) )
+ return md_info_from_type( POLARSSL_MD_SHA512 );
+#endif
+ return NULL;
+}
+
+const md_info_t *md_info_from_type( md_type_t md_type )
+{
+ switch( md_type )
+ {
+#if defined(POLARSSL_MD2_C)
+ case POLARSSL_MD_MD2:
+ return &md2_info;
+#endif
+#if defined(POLARSSL_MD4_C)
+ case POLARSSL_MD_MD4:
+ return &md4_info;
+#endif
+#if defined(POLARSSL_MD5_C)
+ case POLARSSL_MD_MD5:
+ return &md5_info;
+#endif
+#if defined(POLARSSL_SHA1_C)
+ case POLARSSL_MD_SHA1:
+ return &sha1_info;
+#endif
+#if defined(POLARSSL_SHA2_C)
+ case POLARSSL_MD_SHA224:
+ return &sha224_info;
+ case POLARSSL_MD_SHA256:
+ return &sha256_info;
+#endif
+#if defined(POLARSSL_SHA4_C)
+ case POLARSSL_MD_SHA384:
+ return &sha384_info;
+ case POLARSSL_MD_SHA512:
+ return &sha512_info;
+#endif
+ default:
+ return NULL;
+ }
+}
+
+int md_starts( const md_info_t *md_info, md_context_t *ctx )
+{
+ if( md_info == NULL )
+ return 1;
+
+ if( ctx == NULL || ctx->md_ctx != NULL )
+ return 1;
+
+ if( ( ctx->md_ctx = md_info->ctx_alloc_func() ) == NULL )
+ return 1;
+
+ ctx->md_info = md_info;
+
+ md_info->starts_func( ctx->md_ctx );
+
+ return 0;
+}
+
+int md_update( md_context_t *ctx, const unsigned char *input, int ilen )
+{
+ if( ctx == NULL || ctx->md_info == NULL )
+ return 1;
+
+ ctx->md_info->update_func( ctx->md_ctx, input, ilen );
+
+ return 0;
+}
+
+int md_finish( md_context_t *ctx, unsigned char *output )
+{
+ if( ctx == NULL || ctx->md_info == NULL )
+ return 1;
+
+ ctx->md_info->finish_func( ctx->md_ctx, output );
+
+ return 0;
+}
+
+int md_free_ctx( md_context_t *ctx )
+{
+ if( ctx == NULL || ctx->md_info == NULL )
+ return 1;
+
+ ctx->md_info->ctx_free_func( ctx->md_ctx );
+
+ return 0;
+}
+
+int md( const md_info_t *md_info, const unsigned char *input, int ilen,
+ unsigned char *output )
+{
+ if ( md_info == NULL )
+ return 1;
+
+ md_info->digest_func( input, ilen, output );
+
+ return 0;
+}
+
+int md_file( const md_info_t *md_info, const char *path, unsigned char *output )
+{
+ if( md_info == NULL )
+ return 3;
+
+ return md_info->file_func( path, output );
+}
+
+int md_hmac_starts( const md_info_t *md_info, md_context_t *ctx,
+ const unsigned char *key, int keylen )
+{
+ if(md_info == NULL )
+ return 1;
+
+ if( ctx == NULL || ctx->md_ctx != NULL )
+ return 1;
+
+ if( ( ctx->md_ctx = md_info->ctx_alloc_func() ) == NULL )
+ return 1;
+
+ ctx->md_info = md_info;
+
+ md_info->hmac_starts_func( ctx->md_ctx, key, keylen);
+
+ return 0;
+}
+
+int md_hmac_update( md_context_t *ctx, const unsigned char *input, int ilen )
+{
+ if( ctx == NULL || ctx->md_info == NULL )
+ return 1;
+
+ ctx->md_info->hmac_update_func( ctx->md_ctx, input, ilen );
+
+ return 0;
+}
+
+int md_hmac_finish( md_context_t *ctx, unsigned char *output)
+{
+ if( ctx == NULL || ctx->md_info == NULL )
+ return 1;
+
+ ctx->md_info->hmac_finish_func( ctx->md_ctx, output);
+
+ return 0;
+}
+
+int md_hmac_reset( md_context_t *ctx )
+{
+ if( ctx == NULL || ctx->md_info == NULL )
+ return 1;
+
+ ctx->md_info->hmac_reset_func( ctx->md_ctx);
+
+ return 0;
+}
+
+int md_hmac( const md_info_t *md_info, const unsigned char *key, int keylen,
+ const unsigned char *input, int ilen,
+ unsigned char *output )
+{
+ if( md_info == NULL )
+ return 1;
+
+ md_info->hmac_func( key, keylen, input, ilen, output );
+
+ return 0;
+}
+
+#endif
