public static string Decrypt(string cipherText, string teaKey, Encoding encoding = null)
{
if (string.IsNullOrEmpty(cipherText))
{
return(null);
}
if (string.IsNullOrEmpty(teaKey))
{
return(null);
}
if (encoding == null)
{
encoding = Encoding.UTF8;
}
byte[] x = Convert.FromBase64String(cipherText);
uint[] v = StrConvert.StrToLongs(x, 0, 0);
// simply convert first 16 chars of password as key
x = encoding.GetBytes(teaKey);
uint[] k = StrConvert.StrToLongs(x, 0, 16);
byte[] decryptText = DecryptBlock(v, k);
return(encoding.GetString(decryptText));
}
public static string Encrypt(string plainText, string teaKey, Encoding encoding = null)
{
if (string.IsNullOrEmpty(plainText))
{
return(null);
}
if (string.IsNullOrEmpty(teaKey))
{
return(null);
}
if (encoding == null)
{
encoding = Encoding.UTF8;
}
byte[] x = Encoding.UTF8.GetBytes(plainText);
uint[] v = StrConvert.StrToLongs(x, 0, 0);
// simply convert first 16 chars of password as key
x = encoding.GetBytes(teaKey);
uint[] k = StrConvert.StrToLongs(x, 0, 16);
byte[] encryptText = EncryptBlock(v, k);
return(Convert.ToBase64String(encryptText));
}
public string Decrypt(string cipherText)
{
if (String.IsNullOrEmpty(cipherText))
{
return(null);
}
byte[] x = Convert.FromBase64String(cipherText);
uint[] v = StrConvert.StrToLongs(x, 0, 0);
return(Encoding.UTF8.GetString(DecryptBlock(v, teakeyArr)));
}
public string Encrypt(string plainText)
{
if (String.IsNullOrEmpty(plainText))
{
return(null);
}
byte[] x = Encoding.UTF8.GetBytes(plainText);
uint[] v = StrConvert.StrToLongs(x, 0, 0);
return(Convert.ToBase64String(EncryptBlock(v, teakeyArr)));
}
protected override ICryptoValue DecryptInternal(ArraySegment <byte> cipherBytes, CancellationToken cancellationToken)
{
cancellationToken.ThrowIfCancellationRequested();
var cipher = GetBytes(cipherBytes);
if (cipher.Length == 0)
{
return(CreateCryptoValue(cipher, cipher, CryptoMode.Decrypt));
}
var v = StrConvert.StrToLongs(cipher, 0, 0);
var k = StrConvert.StrToLongs(Key.GetKey(), 0, 16);
var original = DecryptBlock(v, k);
return(CreateCryptoValue(original, cipher, CryptoMode.Decrypt, o => o.TrimTerminatorWhenDecrypting = true));
}
public bool SetTeaKey(string teaKey)
{
if (String.IsNullOrEmpty(teaKey))
{
return(false);
}
if (teaKey.Length < 16)
{
return(false);
}
this.teakey = teaKey;
byte[] x = Encoding.UTF8.GetBytes(teaKey);
this.teakeyArr = StrConvert.StrToLongs(x, 0, 16);
return(true);
}
protected override ICryptoValue EncryptInternal(ArraySegment <byte> originalBytes, CancellationToken cancellationToken)
{
cancellationToken.ThrowIfCancellationRequested();
var data = GetBytes(originalBytes);
if (data.Length == 0)
{
return(CreateCryptoValue(data, data, CryptoMode.Encrypt));
}
var v = StrConvert.StrToLongs(data, 0, 0);
var k = StrConvert.StrToLongs(Key.GetKey(), 0, 16);
var cipher = EncryptBlock(v, k);
return(CreateCryptoValue(data, cipher, CryptoMode.Encrypt));
}
public void SetTeaKey(string teaKey)
{
this.teakey = teaKey;
byte[] x = Encoding.UTF8.GetBytes(teaKey);
this.teakeyArr = StrConvert.StrToLongs(x, 0, 16);
}
