[solution SkinnyWhiteGuy] Hi, I have been trying to work with HMAC-SHA1 for oAuth, as it is the base requirement for generating the oAuth Signature. According to the definition http://en.wikipedia.org/wiki/Hash-based_message_authentication_code Definition (from RFC 2104) HMAC (K,m) = H ((K ^ opad) || H ((K ^ ipad) || m)) where H is a cryptographic hash function, K is a secret key padded to the right with extra zeros to the input block size of the hash function, or the has