File Activation Delphi 2016 【Best | CHEAT SHEET】

uses Winapi.Windows, System.SysUtils, System.Classes; function GetMachineID: string; var VolumeSerial: DWORD; MaxCompLen, FileSysFlags: DWORD; RootPath: string; ComputerName: array[0..MAX_COMPUTERNAME_LENGTH + 1] of Char; Size: DWORD; begin RootPath := 'C:'; GetVolumeInformation(PChar(RootPath), nil, 0, @VolumeSerial, MaxCompLen, FileSysFlags, nil, 0); Size := MAX_COMPUTERNAME_LENGTH + 1; GetComputerName(ComputerName, Size); Result := Format('%d-%s', [VolumeSerial, string(ComputerName)]); end; ⚠️ Note: For production, combine multiple identifiers (MAC address, processor ID) to avoid false positives. On your server (or within an admin tool), encrypt the machine ID along with expiration date and features. Use System.NetEncoding and a strong cipher (e.g., Delphi's TCipher_AES from System.Encryption ).

// Rebuild the original data without the hash SetLength(Parts, Length(Parts) - 1); CalculatedHash := THashSHA2.GetHashString(string.Join('|', Parts), SHA256);

MachineIDPart := Parts[0]; HashPart := Parts[High(Parts)]; 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;

// Verify machine binding if MachineIDPart <> GetMachineID then Exit; uses Winapi

Here’s a simplified example using Base64 encoding (not secure alone – always use encryption in real apps):

function ValidateActivationFile(const FileName: string): Boolean; var Lines: TStringList; Decoded, MachineIDPart, HashPart, CalculatedHash: string; Parts: TArray<string>; begin Result := False; if not FileExists(FileName) then Exit; Lines := TStringList.Create; try Lines.LoadFromFile(FileName); if Lines.Count = 0 then Exit; Decoded := TNetEncoding.Base64.Decode(Lines[0]); Parts := Decoded.Split(['|']); if Length(Parts) < 3 then Exit; // Rebuild the original data without the hash

// Optional: Check expiration date if StrToDateDef(Parts[2], 0) < Now then Exit;