HMAC functions in Delphi (HMAC_SHA256, HMAC_SHA1) 1 Yanniel I came across HMAC (Hash-based message authentication code) functions when developing a RESTful client application in Delphi. The RESTful Web Service API required me to send HMAC_SHA256 signatures (Base64 encoded) with each HTTP request.HMAC functions… … Read more 11 years ago in Algorithm, Base64, Delphi, Delphi Programming, HMAC, MD5, Object Pascal Programming, Object-Oriented Programming, SHA1, SHA256 0