+void hmacsha1_final(hmacsha1 *c, unsigned char *digest);
+void hmacsha1_update(hmacsha1 *c, unsigned char *message, int messagelen);
+void hmacsha1_init(hmacsha1 *c, unsigned char *key, int keylen);
+
+void hmacmd5_final(hmacmd5 *c, unsigned char *digest);
+void hmacmd5_update(hmacmd5 *c, unsigned char *message, int messagelen);
+void hmacmd5_init(hmacmd5 *c, unsigned char *key, int keylen);
+
+char *hmac_printhex(unsigned char *data, char *out, size_t len);
+
+int hmac_strcmp(const char *a, const char *b);