File Activation Delphi 2016 May 2026

procedure SignLicenseFile(const LicenseFile: string; const PrivateKey: TArray<Byte>); var LicenseStream: TFileStream; License: TLicenseData; DataToSign: TBytes; Signature: TBytes; begin // Populate License fields (UserName, ProductCode, ExpirationDate, HardwareIDHash, FeatureMask) // ... // Create binary representation of data EXCLUDING the signature field DataToSign := BytesOf(License.UserName) + BytesOf(License.ProductCode) + BytesOf(License.ExpirationDate) + BytesOf(License.FeatureMask) + BytesOf(License.HardwareIDHash);

LicenseStream := TFileStream.Create(LicenseFile, fmCreate); try LicenseStream.WriteBuffer(License, SizeOf(TLicenseData)); finally LicenseStream.Free; end; end; This is the heart of the "File Activation Delphi 2016" process. Your app reads the license file, validates signature, and checks hardware binding. File Activation Delphi 2016

function IsLicenseValid(const LicenseFilePath: string): Boolean; var LicenseStream: TFileStream; License: TLicenseData; DataToVerify: TBytes; StoredSignature: TBytes; PublicKey: TArray<Byte>; // embedded in your app's resources CurrentHardwareID: string; begin Result := False; if not FileExists(LicenseFilePath) then Exit; LicenseStream := TFileStream.Create(LicenseFilePath, fmOpenRead); try if LicenseStream.Read(License, SizeOf(TLicenseData)) <> SizeOf(TLicenseData) then Exit; Now then Result := True

type TLicenseData = packed record Magic: Integer; // Constant identifier, e.g., $4C494345 ('LICE') Version: Byte; // License format version UserName: array[0..99] of Char; ProductCode: TGUID; ExpirationDate: TDateTime; FeatureMask: Int64; HardwareIDHash: array[0..63] of Char; // Base64 of machine hash Signature: array[0..255] of Byte; // RSA signature (2048-bit) end; Your activation server (or a simple Delphi tool you keep in-house) signs the file. You will need a private key (e.g., from OpenSSL). For brevity, assume you have a SignData function that uses RSA-SHA256. var LicenseStream: TFileStream

// Node-locking: Compare stored HardwareID with current machine CurrentHardwareID := GetHardwareID; if CompareMem(@License.HardwareIDHash[0], @CurrentHardwareID[1], Length(CurrentHardwareID)) then begin // Check expiration if License.ExpirationDate > Now then Result := True; end; finally LicenseStream.Free; end; end; In your main project file ( .dpr ) or in the OnCreate event of your main form: