Result := True; finally Lines.Free; end; end; In your project source (or main form’s OnCreate ):
// Optional: Check expiration date if StrToDateDef(Parts[2], 0) < Now then Exit; file activation delphi 2016
uses System.NetEncoding, System.Hash; function GenerateActivationFile(const MachineID, UserEmail: string; ExpireDays: Integer): string; var ExpireDate: TDateTime; RawData, HashData: string; begin ExpireDate := Now + ExpireDays; RawData := Format('%s|%s|%s', [MachineID, UserEmail, DateToStr(ExpireDate)]); HashData := THashSHA2.GetHashString(RawData, SHA256); Result := TNetEncoding.Base64.Encode(RawData + '|' + HashData); // Save Result to a file, e.g., "activation.key" end; Result := True; finally Lines
if CalculatedHash <> HashPart then Exit; Result := True
On activation, your server returns this encoded string as a .key or .lic file. When your application starts, locate the activation file and validate it.
MachineIDPart := Parts[0]; HashPart := Parts[High(Parts)];
// Rebuild the original data without the hash SetLength(Parts, Length(Parts) - 1); CalculatedHash := THashSHA2.GetHashString(string.Join('|', Parts), SHA256);