25 #if defined(__GNUC__) && __GNUC__ >= 4 && !defined(__MINGW32__)
26 #pragma GCC visibility push(hidden)
28 void hmac_md5(
const unsigned char key[16],
29 const unsigned char* data,
size_t data_len,
30 unsigned char* digest);
31 #if defined(__GNUC__) && __GNUC__ >= 4 && !defined(__MINGW32__)
32 #pragma GCC visibility pop