Org.BouncyCastle.Crypto.Signers.HMacDsaKCalculator
A deterministic K calculator based on the algorithm in section 3.2 of RFC 6979.
Supply additional input to HMAC_K(V || 0x00 || int2octets(x) || bits2octets(h1)).
Supply additional input to HMAC_K(V || 0x01 || int2octets(x) || bits2octets(h1)).