- Added generic message digest wrapper for integration with OpenVPN (donated by Fox-IT)

diff --git a/tests/suites/test_suite_md.function b/tests/suites/test_suite_md.function
new file mode 100644
index 0000000..82f82b1
--- /dev/null
+++ b/tests/suites/test_suite_md.function
@@ -0,0 +1,223 @@
+BEGIN_HEADER
+#include <polarssl/config.h>
+#include <polarssl/md.h>
+#include <polarssl/md2.h>
+#include <polarssl/md4.h>
+#include <polarssl/md5.h>
+#include <polarssl/sha1.h>
+#include <polarssl/sha2.h>
+#include <polarssl/sha4.h>
+END_HEADER
+
+BEGIN_CASE
+md_text:text_md_name:text_src_string:hex_hash_string
+{
+    char md_name[100];
+    unsigned char src_str[1000];
+    unsigned char hash_str[1000];
+    unsigned char output[100];
+    const md_info_t *md_info = NULL;
+
+    memset(md_name, 0x00, 100);
+    memset(src_str, 0x00, 1000);
+    memset(hash_str, 0x00, 1000);
+    memset(output, 0x00, 100);
+
+    strcpy( (char *) src_str, {text_src_string} );
+    
+    strncpy( (char *) md_name, {text_md_name}, 100 );
+    md_info = md_info_from_string(md_name);
+    TEST_ASSERT( md_info != NULL );
+
+    TEST_ASSERT ( 0 == md( md_info, src_str, strlen( (char *) src_str ), output ) );
+    hexify( hash_str, output, md_get_size(md_info) );
+
+    TEST_ASSERT( strcmp( (char *) hash_str, {hex_hash_string} ) == 0 );
+}
+END_CASE
+
+BEGIN_CASE
+md_hex:text_md_name:hex_src_string:hex_hash_string
+{
+    char md_name[100];
+    unsigned char src_str[10000];
+    unsigned char hash_str[10000];
+    unsigned char output[100];
+    int src_len;
+    const md_info_t *md_info = NULL;
+
+    memset(md_name, 0x00, 100);
+    memset(src_str, 0x00, 10000);
+    memset(hash_str, 0x00, 10000);
+    memset(output, 0x00, 100);
+
+    strncpy( (char *) md_name, {text_md_name}, 100 );
+    md_info = md_info_from_string(md_name);
+    TEST_ASSERT( md_info != NULL );
+
+    src_len = unhexify( src_str, {hex_src_string} );
+    TEST_ASSERT ( 0 == md( md_info, src_str, src_len, output ) );
+
+    hexify( hash_str, output, md_get_size(md_info) );
+
+    TEST_ASSERT( strcmp( (char *) hash_str, {hex_hash_string} ) == 0 );
+}
+END_CASE
+
+BEGIN_CASE
+md_text_multi:text_md_name:text_src_string:hex_hash_string
+{
+    char md_name[100];
+    unsigned char src_str[1000];
+    unsigned char hash_str[1000];
+    unsigned char output[100];
+    
+    const md_info_t *md_info = NULL;
+    md_context_t ctx = MD_CONTEXT_T_INIT;
+
+    memset(md_name, 0x00, 100);
+    memset(src_str, 0x00, 1000);
+    memset(hash_str, 0x00, 1000);
+    memset(output, 0x00, 100);
+
+    strcpy( (char *) src_str, {text_src_string} );
+    
+    strncpy( (char *) md_name, {text_md_name}, 100 );
+    md_info = md_info_from_string(md_name);
+    TEST_ASSERT( md_info != NULL );
+
+    TEST_ASSERT ( 0 == md_starts( md_info, &ctx ) );
+    TEST_ASSERT ( ctx.md_ctx != NULL );
+    TEST_ASSERT ( 0 == md_update( &ctx, src_str, strlen( (char *) src_str ) ) );
+    TEST_ASSERT ( 0 == md_finish( &ctx, output ) );
+    TEST_ASSERT ( 0 == md_free_ctx( &ctx ) );
+    
+    hexify( hash_str, output, md_get_size(md_info) );
+
+    TEST_ASSERT( strcmp( (char *) hash_str, {hex_hash_string} ) == 0 );
+}
+END_CASE
+
+BEGIN_CASE
+md_hex_multi:text_md_name:hex_src_string:hex_hash_string
+{
+    char md_name[100];
+    unsigned char src_str[10000];
+    unsigned char hash_str[10000];
+    unsigned char output[100];
+    int src_len;
+    const md_info_t *md_info = NULL;
+    md_context_t ctx = MD_CONTEXT_T_INIT;
+
+    memset(md_name, 0x00, 100);
+    memset(src_str, 0x00, 10000);
+    memset(hash_str, 0x00, 10000);
+    memset(output, 0x00, 100);
+
+    strncpy( (char *) md_name, {text_md_name}, 100 );
+    md_info = md_info_from_string(md_name);
+    TEST_ASSERT( md_info != NULL );
+
+    src_len = unhexify( src_str, {hex_src_string} );
+    
+    TEST_ASSERT ( 0 == md_starts( md_info, &ctx ) );
+    TEST_ASSERT ( ctx.md_ctx != NULL );
+    TEST_ASSERT ( 0 == md_update( &ctx, src_str, src_len ) );
+    TEST_ASSERT ( 0 == md_finish( &ctx, output ) );
+    TEST_ASSERT ( 0 == md_free_ctx( &ctx ) );
+    
+    hexify( hash_str, output, md_get_size(md_info) );
+
+    TEST_ASSERT( strcmp( (char *) hash_str, {hex_hash_string} ) == 0 );
+}
+END_CASE
+
+BEGIN_CASE
+md_hmac:text_md_name:trunc_size:hex_key_string:hex_src_string:hex_hash_string
+{
+    char md_name[100];
+    unsigned char src_str[10000];
+    unsigned char key_str[10000];
+    unsigned char hash_str[10000];
+    unsigned char output[100];
+    int key_len, src_len;
+    const md_info_t *md_info = NULL;
+
+    memset(md_name, 0x00, 100);
+    memset(src_str, 0x00, 10000);
+    memset(key_str, 0x00, 10000);
+    memset(hash_str, 0x00, 10000);
+    memset(output, 0x00, 100);
+
+    strncpy( (char *) md_name, {text_md_name}, 100 );
+    md_info = md_info_from_string( md_name );
+    TEST_ASSERT( md_info != NULL );
+
+    key_len = unhexify( key_str, {hex_key_string} );
+    src_len = unhexify( src_str, {hex_src_string} );
+
+    TEST_ASSERT ( md_hmac( md_info, key_str, key_len, src_str, src_len, output ) == 0 );
+    hexify( hash_str, output, md_get_size(md_info) );
+
+    TEST_ASSERT( strncmp( (char *) hash_str, {hex_hash_string}, {trunc_size} * 2 ) == 0 );
+}
+END_CASE
+
+BEGIN_CASE
+md_hmac_multi:text_md_name:trunc_size:hex_key_string:hex_src_string:hex_hash_string
+{
+    char md_name[100];
+    unsigned char src_str[10000];
+    unsigned char key_str[10000];
+    unsigned char hash_str[10000];
+    unsigned char output[100];
+    int key_len, src_len;
+    const md_info_t *md_info = NULL;
+    md_context_t ctx = MD_CONTEXT_T_INIT;
+
+    memset(md_name, 0x00, 100);
+    memset(src_str, 0x00, 10000);
+    memset(key_str, 0x00, 10000);
+    memset(hash_str, 0x00, 10000);
+    memset(output, 0x00, 100);
+
+    strncpy( (char *) md_name, {text_md_name}, 100 );
+    md_info = md_info_from_string( md_name );
+    TEST_ASSERT( md_info != NULL );
+
+    key_len = unhexify( key_str, {hex_key_string} );
+    src_len = unhexify( src_str, {hex_src_string} );
+
+    TEST_ASSERT ( 0 == md_hmac_starts( md_info, &ctx, key_str, key_len ) );
+    TEST_ASSERT ( ctx.md_ctx != NULL );
+    TEST_ASSERT ( 0 == md_hmac_update( &ctx, src_str, src_len ) );
+    TEST_ASSERT ( 0 == md_hmac_finish( &ctx, output ) );
+    TEST_ASSERT ( 0 == md_free_ctx( &ctx ) );
+    
+    hexify( hash_str, output, md_get_size(md_info) );
+
+    TEST_ASSERT( strncmp( (char *) hash_str, {hex_hash_string}, {trunc_size} * 2 ) == 0 );
+}
+END_CASE
+BEGIN_CASE
+md_file:text_md_name:filename:hex_hash_string
+{
+    char md_name[100];
+    unsigned char hash_str[1000];
+    unsigned char output[100];
+    const md_info_t *md_info = NULL;
+
+    memset(md_name, 0x00, 100);
+    memset(hash_str, 0x00, 1000);
+    memset(output, 0x00, 100);
+
+    strncpy( (char *) md_name, {text_md_name}, 100 );
+    md_info = md_info_from_string( md_name );
+    TEST_ASSERT( md_info != NULL );
+
+    md_file( md_info, {filename}, output);
+    hexify( hash_str, output, md_get_size(md_info) );
+
+    TEST_ASSERT( strcmp( (char *) hash_str, {hex_hash_string} ) == 0 );
+}
+END_CASE