meillo@10: void
meillo@10: hmac_md5(unsigned char *text, int text_len, unsigned char *key, int key_len, unsigned char *digest);
meillo@10: 	 /* text;     pointer to data stream */
meillo@10: 	 /* text_len; length of data stream */
meillo@10: 	 /* key;      pointer to authentication key */
meillo@10: 	 /* key_len;  length of authentication key */
meillo@10: 	 /* digest;   caller digest to be filled in */