THANK YOU !!!
I have try this , and it works ( the necesary units ( by dependecy you must be put in the same directory ) are .... SynCrypto.pas, SynCommons.pas, SynTable.pas , SynLZ.pas , Synopse.inc , SynopseCommit.inc ( all these files are in this link Github ) OR if you prefer ... are attched to this post
Uses system, SynCrypto
function CalculateHMACSHA256(const value, sKey: String): String;
var
sha256Digest: TSHA256Digest;
begin
try
HMAC_SHA256(UTF8Encode(skey),UTF8Encode(value),sha256Digest);
Result:=UpperCase(SHA256DigestToString(sha256Digest));
except
Result:='';
end;
end;
Synopse.inc
SynopseCommit.inc
SynCommons.pas
SynCrypto.pas
SynLZ.pas
SynTable.pas
sha512-x64sse4.obj
sha512-x86.obj