ThinkSharp.Licensing

Simple library with fluent API for creating and verifying signed licenses

Usage

Hardware Identifier

// Create:
// e.g. "5BED5GAB-E5TGXKGK-01SI8MFF-7T099W78-SRH4"
string hardwareIdentifier = HardwareIdentifier.ForCurrentComputer();

// Validate Checksum
if (!HardwareIdentifier.IsCheckSumValid(hardwareIdentifier))
    Console.WriteLine("Entered hardware identifier is not valid.");
    
// Validate for current computer
if (!HardwareIdentifier.IsValidForCurrentComputer(hardwareIdentifier))
    Console.WriteLine("Your license is not valid for this computer.");

Create Serial Number

// e.g "SNABC-D156-KYJF-C4M5-1H96"
string serialNumber = SerialNumber.Create("ABC");

// Validate CheckSum
if (!SerialNumber.IsCheckSumValid(serialNumber))
    Console.WriteLine("Entered serial number is not valid.");

Create key value Pair

SigningKeyPair pair = Lic.KeyGenerator.GenerateRsaKeyPair();
  Console.WriteLine(pair.PrivateKey);
  Console.WriteLine(pair.PublicKey);

Create signed license

SignedLicense license = Lic.Builder
    .WithRsaPrivateKey(pk)
    .WithHardwareIdentifier(HardwareIdentifier.ForCurrentComputer())
    .WithSerialNumber(SerialNumber.Create("ABC"))
    .WithoutExpiration()
    .WithProperty("Name", "Bill Gates")
    .WithProperty("Company", "Microsoft")
    .SignAndCreate();

Serialize license

var encryptedText = license.Serialize();
// FW9JbxVRYW8hcWBVZ3VHbGosEBxfYhlMZmshHHUxGBVbHBksc3
// 9EHywLc2NNaWIsE39YaAxFbXo7BhhSYxwhZmBJYSAGGxkuEhUj
// GREwFw08GxsxEBc8GywLER8jGBAuGRQ1EgEzExc5Ehs0GSAGZU
// BsRRdOQk1tAGptX0RyLSdPRExxQUN1EWxoQ19jWE5nVCAGahJm
// Ek8/GhFwSwY7ehk3Sm4+cRk4EFh4GVkydFh0U0NURAZUWBVnbW
// 9eXQ5JTWtgElI4cHxaBFtEQ2ZBGlFiSmR5bWsuEHRfAENAYx8+
// U09vQmM+Tg5SakFmcmxKFWM9YQ4yR2NVSVdidUwnE1BuS0BLeX
// tbU0tifnNDQ25teVZjcXl2H2pQVnk7QEBTC19FXFRGeGs6T1FX
// SUR0YmprFmknHRA5VBpOeUdYHQ==

var plainText = license.Serialize(true);
// 5BED4PAB-ZATGXKGK-01SI8MFF-7T088W78-SRH4
// SNABC-3RTC-DMW7-9SC1-MAHA
// 08/28/2017 00:00:00
// 12/31/9999 23:59:59
// Name:Bill Gates
// Company:Microsoft
// A3g2b310qk+7Q86jC2Z890ut2x3TuxxbUd+Xs4fMBRv/HmFl9s
// 9PQV/zEcKM1pcjIuFJ/0YS+bAC22xnnbN2e/SJljYMK5N1J/3g
// NYbvcUa+8qokmGRZZsfnURBcCaRwbQTz4KQvT7kaR+rIwuGXF6
// dpViixIKj6D+618t7BRfY=

Verify License

// throws exception if license is not valid
SignedLicense license = Lic.Verifier
	    .WithRsaPublicKey(publicKey)
	    .WithApplicationCode("ABC")
	    .LoadAndVerify(licenseText);