public static Dictionary <string, object> Validate(License licenseKey, RSAParameters rsaParameters)
{
var keys = ExtractKeys(licenseKey.Keys);
var result = new Dictionary <string, object>();
return(result);
//using (var ms = new MemoryStream())
//using (var br = new BinaryReader(ms))
//{
// var buffer = keys.Attributes;
// ms.Write(buffer, 0, buffer.Length);
// ms.Position = 0;
// while (ms.Position < buffer.Length)
// {
// var token = ms.ReadByte();
// var index = token & 0x1F;
// object val;
// var curr = (ValueType)(token >> TypeBitsToShift);
// switch (curr)
// {
// case ValueType.False:
// val = false;
// break;
// case ValueType.True:
// val = true;
// break;
// case ValueType.Int8:
// val = (int)br.ReadByte();
// break;
// case ValueType.Int32:
// val = br.ReadInt32();
// break;
// case ValueType.Date:
// val = FromDosDate(br.ReadUInt16());
// break;
// case ValueType.String:
// var valLength = (int)br.ReadByte();
// val = Encoding.UTF8.GetString(br.ReadBytes(valLength));
// break;
// default:
// throw new ArgumentOutOfRangeException();
// }
// if (index >= Terms.Length)
// continue; // new field, just skip
// result[Terms[index]] = val;
// }
// var attributesLen = ms.Position;
// ms.SetLength(attributesLen);
// using (var binaryWriter = new BinaryWriter(ms))
// using (var rsa = RSA.Create())
// {
// binaryWriter.Write(licenseKey.Id.ToByteArray());
// binaryWriter.Write(licenseKey.Name);
// rsa.ImportParameters(rsaParameters);
// using (var sha1 = SHA1.Create())
// {
// ms.Position = 0;
// var hash = sha1.ComputeHash(ms);
// if (rsa.VerifyHash(hash, keys.Signature, HashAlgorithmName.SHA1, RSASignaturePadding.Pkcs1) == false)
// throw new InvalidDataException("Could not validate signature on license");
// }
// }
//return result;
//}
}
public static Dictionary <string, object> Validate(License licenseKey, RSAParameters rsaParameters)
{
var keys = ExtractKeys(licenseKey.Keys);
var result = new Dictionary <string, object>();
using (var ms = new MemoryStream())
using (var br = new BinaryReader(ms))
{
var buffer = keys.Attributes;
ms.Write(buffer, 0, buffer.Length);
ms.Position = 0;
while (ms.Position < buffer.Length)
{
var licensePropertyExists = TryGetTermIndexAndType(br, out string licenseProperty, out ValueType type);
object val = type switch
{
ValueType.False => false,
ValueType.True => true,
ValueType.Int8 => (int)br.ReadByte(),
ValueType.Int32 => br.ReadInt32(),
ValueType.Date => FromDosDate(br.ReadUInt16()),
ValueType.String => Encoding.UTF8.GetString(br.ReadBytes((int)br.ReadByte())),
_ => throw new ArgumentOutOfRangeException(),
};
if (licensePropertyExists == false)
{
//new license property
continue;
}
result[licenseProperty] = val;
}
var attributesLen = ms.Position;
ms.SetLength(attributesLen);
using (var binaryWriter = new BinaryWriter(ms))
using (var rsa = RSA.Create())
{
binaryWriter.Write(licenseKey.Id.ToByteArray());
binaryWriter.Write(licenseKey.Name);
rsa.ImportParameters(rsaParameters);
using (var sha1 = SHA1.Create())
{
ms.Position = 0;
var hash = sha1.ComputeHash(ms);
if (rsa.VerifyHash(hash, keys.Signature, HashAlgorithmName.SHA1, RSASignaturePadding.Pkcs1) == false)
{
throw new InvalidDataException("Could not validate signature on license");
}
}
}
return(result);
}
}
private static bool ValidateLicense(License oldLicense, RSAParameters rsaParameters, License newLicense)
{
try
{
LicenseValidator.Validate(oldLicense, rsaParameters);
}
catch (Exception e)
{
if (Logger.IsInfoEnabled)
{
Logger.Info($"Failed to validate license: `{oldLicense}`", e);
}
return(true);
}
if (oldLicense.Id != newLicense.Id)
{
if (Logger.IsInfoEnabled)
{
Logger.Info($"Can't update license because the new license ID is: {newLicense.Id} " +
$"while old license ID is: {oldLicense.Id}");
}
return(false);
}
return(true);
}
public static Dictionary <string, object> Validate(License licenseKey, RSAParameters rsAParameters)
{
if (licenseKey.Keys.Count != 2)
{
throw new InvalidDataException("Wrong number of keys");
}
var result = new Dictionary <string, object>();
using (var ms = new MemoryStream())
using (var br = new BinaryReader(ms))
{
var buffer = GetBytesFromBase64String(licenseKey.Keys.First());
ms.Write(buffer, 0, buffer.Length);
ms.Position = 0;
while (ms.Position < buffer.Length)
{
var token = ms.ReadByte();
var index = token & 0x1F;
object val;
var curr = (ValueType)(token >> TypeBitsToShift);
switch (curr)
{
case ValueType.False:
val = false;
break;
case ValueType.True:
val = true;
break;
case ValueType.Int:
val = (int)br.ReadByte();
break;
case ValueType.Date:
val = FromDosDate(br.ReadUInt16());
break;
case ValueType.String:
var valLength = (int)br.ReadByte();
val = Encoding.UTF8.GetString(br.ReadBytes(valLength));
break;
default:
throw new ArgumentOutOfRangeException();
}
if (index >= Terms.Length)
{
continue; // new field, just skip
}
result[Terms[index]] = val;
}
var attributesLen = ms.Position;
ms.SetLength(attributesLen);
new BinaryWriter(ms).Write(licenseKey.Id.ToByteArray());
new BinaryWriter(ms).Write(licenseKey.Name);
using (var rsa = new RSACryptoServiceProvider())
{
rsa.ImportParameters(rsAParameters);
using (var sha1 = SHA1.Create())
{
ms.Position = 0;
var hash = sha1.ComputeHash(ms);
var signature = licenseKey.Keys.Last();
if (rsa.VerifyHash(hash, GetBytesFromBase64String(signature), HashAlgorithmName.SHA1, RSASignaturePadding.Pkcs1) == false)
{
throw new InvalidDataException("Could not validate signature on license");
}
}
}
return(result);
}
}
