diff --git a/include/polarssl/md5.h b/include/polarssl/md5.h
new file mode 100644
index 0000000..a772542
--- /dev/null
+++ b/include/polarssl/md5.h
@@ -0,0 +1,119 @@
+/**
+ * \file md5.h
+ */
+#ifndef XYSSL_MD5_H
+#define XYSSL_MD5_H
+
+/**
+ * \brief          MD5 context structure
+ */
+typedef struct
+{
+    unsigned long total[2];     /*!< number of bytes processed  */
+    unsigned long state[4];     /*!< intermediate digest state  */
+    unsigned char buffer[64];   /*!< data block being processed */
+
+    unsigned char ipad[64];     /*!< HMAC: inner padding        */
+    unsigned char opad[64];     /*!< HMAC: outer padding        */
+}
+md5_context;
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * \brief          MD5 context setup
+ *
+ * \param ctx      context to be initialized
+ */
+void md5_starts( md5_context *ctx );
+
+/**
+ * \brief          MD5 process buffer
+ *
+ * \param ctx      MD5 context
+ * \param input    buffer holding the  data
+ * \param ilen     length of the input data
+ */
+void md5_update( md5_context *ctx, unsigned char *input, int ilen );
+
+/**
+ * \brief          MD5 final digest
+ *
+ * \param ctx      MD5 context
+ * \param output   MD5 checksum result
+ */
+void md5_finish( md5_context *ctx, unsigned char output[16] );
+
+/**
+ * \brief          Output = MD5( input buffer )
+ *
+ * \param input    buffer holding the  data
+ * \param ilen     length of the input data
+ * \param output   MD5 checksum result
+ */
+void md5( unsigned char *input, int ilen, unsigned char output[16] );
+
+/**
+ * \brief          Output = MD5( file contents )
+ *
+ * \param path     input file name
+ * \param output   MD5 checksum result
+ *
+ * \return         0 if successful, 1 if fopen failed,
+ *                 or 2 if fread failed
+ */
+int md5_file( char *path, unsigned char output[16] );
+
+/**
+ * \brief          MD5 HMAC context setup
+ *
+ * \param ctx      HMAC context to be initialized
+ * \param key      HMAC secret key
+ * \param keylen   length of the HMAC key
+ */
+void md5_hmac_starts( md5_context *ctx, unsigned char *key, int keylen );
+
+/**
+ * \brief          MD5 HMAC process buffer
+ *
+ * \param ctx      HMAC context
+ * \param input    buffer holding the  data
+ * \param ilen     length of the input data
+ */
+void md5_hmac_update( md5_context *ctx, unsigned char *input, int ilen );
+
+/**
+ * \brief          MD5 HMAC final digest
+ *
+ * \param ctx      HMAC context
+ * \param output   MD5 HMAC checksum result
+ */
+void md5_hmac_finish( md5_context *ctx, unsigned char output[16] );
+
+/**
+ * \brief          Output = HMAC-MD5( hmac key, input buffer )
+ *
+ * \param key      HMAC secret key
+ * \param keylen   length of the HMAC key
+ * \param input    buffer holding the  data
+ * \param ilen     length of the input data
+ * \param output   HMAC-MD5 result
+ */
+void md5_hmac( unsigned char *key, int keylen,
+               unsigned char *input, int ilen,
+               unsigned char output[16] );
+
+/**
+ * \brief          Checkup routine
+ *
+ * \return         0 if successful, or 1 if the test failed
+ */
+int md5_self_test( int verbose );
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* md5.h */