HMAC-SHA1

Overview

HMAC-SHA1 is an HMAC (hash-based message authentication code), a type of message authentication code using a cryptographic hash function and a secret cryptographic key, generated by the SHA-1 hash algorithm.

It is implemented in FPC trunk revision 27319 of March 2014.

Example code: packages/hash/examples/hsha1.pp

// See some samples in: http://en.wikipedia.org/wiki/Hash-based_message_authentication_code
program hsha1;

{$mode objfpc}{$H+}

uses
  HMAC;

begin
  // for HMAC_SHA1("", "") = 0xfbdb1d1b18aa6c08324b7d64b71fb76370690e1d
  WriteLn('Example 1: ', HMACSHA1Print(HMACSHA1Digest('', '')));
  
// for HMAC_SHA1("key", "The quick brown fox jumps over the lazy dog") = 0xde7c9b85b8b78aa6bc8a7a36f70a90701c9db4d9
  WriteLn('Example 2: ', HMACSHA1('key', 'The quick brown fox jumps over the lazy dog'));
end.

See also

• Mailing list thread started by the author of the code.
• HMAC-MD5
• hash

From the Free Pascal wiki, page "HMAC-SHA1", as it stood on 2021-10-28 after a change by Trev, out of the wiki's dump of 2024-05-26. Copyright stays with the author who wrote it, according to the old wiki's Licensing page. If you have concerns about this material, message the admin.