meillo@211: void hmac_md5(
meillo@366: 	unsigned char *text,   /* pointer to the message */
meillo@211: 	int textlen,           /* length of the message */
meillo@366: 	unsigned char *key,    /* pointer to the authentication key */
meillo@211: 	int keylen,            /* length of the key */
meillo@366: 	unsigned char *digest  /* pointer to allocated memory to store the computed HMAC */
meillo@211: );