DigestState* hmac_sha2_256(uchar*, ulong, uchar*, ulong, uchar*, DigestState*);
DigestState* hmac_sha2_384(uchar*, ulong, uchar*, ulong, uchar*, DigestState*);
DigestState* hmac_sha2_512(uchar*, ulong, uchar*, ulong, uchar*, DigestState*);
DigestState* hmac_sha2_256(uchar*, ulong, uchar*, ulong, uchar*, DigestState*);
DigestState* hmac_sha2_384(uchar*, ulong, uchar*, ulong, uchar*, DigestState*);
DigestState* hmac_sha2_512(uchar*, ulong, uchar*, ulong, uchar*, DigestState*);