+
−void hmac_md5(unsigned char *text, int text_len,
+
−	      unsigned char* key, int key_len, unsigned char *digest);
+
−     /* text;     pointer to data stream */
+
−     /* text_len; length of data stream */
+
−     /* key;      pointer to authentication key */
+
−     /* key_len;  length of authentication key */
+
−     /* digest;   caller digest to be filled in */