protected static void Main(string[] args)
{
// This is the provided encoded input
string keyString = "ABvAsOKcGXqc5uQ4O5Z53isJaH31Pa8+PeddljE4mSU=";
Console.WriteLine("This is the encoded string: " + keyString);
// Here I am decoding the encoded input
byte[] data = Encoding.UTF8.GetBytes(keyString);
string decodedString = Encoding.Unicode.GetString(data);
//printing the decoded text
Console.WriteLine("\nThis is the encoded string decoded: " + decodedString);
//creating TripleDes call name
TripleDES decoder = TripleDES.Create();
//Setting the key and vector parameters
byte[] key = Encoding.UTF8.GetBytes("0123456789ABCDEF");
int keySize = 128; // could not figure out where to place the key size :(
byte[] vector = Encoding.UTF8.GetBytes("ABCDEFGH");
// setting the decryptor to type ICryptoTransform
ICryptoTransform decryptor;
// creates the decryptor
decryptor = decoder.CreateDecryptor(key, vector);
decodedString = decryptor.ToString();
Console.WriteLine("");
//Is supposed to print the results
Console.WriteLine("This is the decoded string decrypted: " + decodedString);
}
public override void init(int mode, byte[] key, byte[] iv)
{
m_triDes = new TripleDESCryptoServiceProvider();
m_triDes.Mode = CipherMode.CBC;
m_triDes.Padding = PaddingMode.None;
byte[] tmp;
if (iv.Length > m_ivsize)
{
tmp = new byte[m_ivsize];
Array.Copy(iv, 0, tmp, 0, tmp.Length);
iv = tmp;
}
if (key.Length > m_bsize)
{
tmp = new byte[m_bsize];
Array.Copy(key, 0, tmp, 0, tmp.Length);
key = tmp;
}
try
{
m_cipher = (mode == ENCRYPT_MODE
? m_triDes.CreateEncryptor(key, iv)
: m_triDes.CreateDecryptor(key, iv)
);
}
catch (Exception)
{
m_cipher = null;
}
}
public static string Decryption(string CypherText)
{
byte[] b = Convert.FromBase64String(CypherText);
System.Security.Cryptography.TripleDES des = CreateDES(key);
ICryptoTransform ct = des.CreateDecryptor();
byte[] output = ct.TransformFinalBlock(b, 0, b.Length);
return(Encoding.Unicode.GetString(output));
}
public override byte[] DecryptKey(byte[] rgbEncryptedWrappedKeyData)
{
System.Security.Cryptography.TripleDES tdes = (System.Security.Cryptography.TripleDES) this.Key;
if (((rgbEncryptedWrappedKeyData.Length != 0x20) && (rgbEncryptedWrappedKeyData.Length != 40)) && (rgbEncryptedWrappedKeyData.Length != 0x30))
{
throw new CryptographicException("BadSizeForKeyToBeWrapped");
}
tdes.Mode = CipherMode.CBC;
tdes.Padding = PaddingMode.None;
ICryptoTransform transform = tdes.CreateDecryptor(tdes.Key, TripleDESKeyExchangeFormatter.s_rgbTripleDES_KW_IV);
byte[] buffer1 = transform.TransformFinalBlock(rgbEncryptedWrappedKeyData, 0, rgbEncryptedWrappedKeyData.Length);
Array.Reverse(buffer1);
byte[] buffer2 = new byte[8];
Buffer.BlockCopy(buffer1, 0, buffer2, 0, 8);
byte[] buffer3 = new byte[buffer1.Length - buffer2.Length];
Buffer.BlockCopy(buffer1, 8, buffer3, 0, buffer3.Length);
ICryptoTransform transform2 = tdes.CreateDecryptor(tdes.Key, buffer2);
byte[] buffer4 = transform2.TransformFinalBlock(buffer3, 0, buffer3.Length);
byte[] buffer5 = new byte[buffer4.Length - 8];
Buffer.BlockCopy(buffer4, 0, buffer5, 0, buffer5.Length);
SHA1 sha1 = SHA1.Create();
byte[] buffer6 = sha1.ComputeHash(buffer5);
int bufLen = buffer5.Length;
for (int keyBufPos = 0; bufLen < buffer4.Length; keyBufPos++)
{
if (buffer4[bufLen] != buffer6[keyBufPos])
{
throw new CryptographicException("BadSizeForKeyToBeUnwrapped");
}
bufLen++;
}
return(buffer5);
}
public override string Decrypt(string cipherText, string key, string iv)
{
try
{
System.Security.Cryptography.TripleDES tdes = System.Security.Cryptography.TripleDES.Create();
byte[] inputBytes = Convert.FromBase64String(cipherText);
tdes.Key = Convert.FromBase64String(key);
tdes.IV = Convert.FromBase64String(iv);
MemoryStream ms = new MemoryStream();
CryptoStream cs = new CryptoStream(ms, tdes.CreateDecryptor(), CryptoStreamMode.Write);
cs.Write(inputBytes, 0, inputBytes.Length);
cs.FlushFinalBlock();
return(Encoding.UTF8.GetString(ms.ToArray()));
}
catch (Exception e)
{
return("\nERROR: " + e.Message);
}
}
public override void init(int mode, byte[] key, byte[] iv)
{
if (mode != ENCRYPT_MODE && mode != DECRYPT_MODE) throw new ArgumentOutOfRangeException();
ms = new PipedMemoryStream();
desm = TripleDES.Create();
desm.KeySize = BlockSize * 8;
desm.Padding = PaddingMode.None;
ICryptoTransform ict;
if (mode == ENCRYPT_MODE)
{
ict = desm.CreateEncryptor(key, iv);
}
else
{
ict = desm.CreateDecryptor(key, iv);
}
cs = new CryptoStream(ms, ict, CryptoStreamMode.Write);
}
/// <summary>
/// 解密
/// </summary>
/// <param name="cryptoText">密文</param>
/// <param name="decryptKey">解密密钥</param>
/// <returns></returns>
public string Decrypt(string cryptoText, string decryptKey)
{
if (!string.IsNullOrEmpty(decryptKey))
{
this.key = decryptKey;
mCrypto.Key = GetLegalKey();
}
byte[] arrCryptoText = Convert.FromBase64String(cryptoText);
using (MemoryStream stream = new MemoryStream(arrCryptoText, 0, arrCryptoText.Length))
{
ICryptoTransform decryptor = mCrypto.CreateDecryptor();
using (CryptoStream cStream = new CryptoStream(stream, decryptor, CryptoStreamMode.Read))
{
StreamReader reader = new StreamReader(cStream);
return(reader.ReadToEnd());
}
}
}
public bool Decrypt(ref string value)
{
Byte[] tmp = Convert.FromBase64String(value);
string result = string.Empty;
System.Security.Cryptography.TripleDES tripleDES = System.Security.Cryptography.TripleDES.Create();
ICryptoTransform decryptor = tripleDES.CreateDecryptor(key, iv);
using (MemoryStream ms = new MemoryStream(tmp)) {
try {
using (CryptoStream cs = new CryptoStream(ms, decryptor, CryptoStreamMode.Read)) {
StreamReader reader = new StreamReader(cs);
result = reader.ReadLine();
}
} catch (System.Security.Cryptography.CryptographicException ex) {
value = ex.Message;
return(false);
}
}
tripleDES.Clear();
value = result;
return(true);
}
public override ICryptoTransform CreateDecryptor() => _impl.CreateDecryptor();
public override void init(int mode, byte[] key, byte[] iv)
{
triDes = new TripleDESCryptoServiceProvider();
triDes.Mode = CipherMode.CBC;
triDes.Padding = PaddingMode.None;
//String pad="NoPadding";
//if(padding) pad="PKCS5Padding";
byte[] tmp;
if (iv.Length > ivsize)
{
tmp = new byte[ivsize];
Array.Copy(iv, 0, tmp, 0, tmp.Length);
iv = tmp;
}
if (key.Length > bsize)
{
tmp = new byte[bsize];
Array.Copy(key, 0, tmp, 0, tmp.Length);
key = tmp;
}
try
{
// cipher=javax.crypto.Cipher.getInstance("DESede/CBC/"+pad);
/*
// The following code does not work on IBM's JDK 1.4.1
SecretKeySpec skeySpec = new SecretKeySpec(key, "DESede");
cipher.init((mode==ENCRYPT_MODE?
javax.crypto.Cipher.ENCRYPT_MODE:
javax.crypto.Cipher.DECRYPT_MODE),
skeySpec, new IvParameterSpec(iv));
*/
// DESedeKeySpec keyspec=new DESedeKeySpec(key);
// SecretKeyFactory keyfactory=SecretKeyFactory.getInstance("DESede");
// SecretKey _key=keyfactory.generateSecret(keyspec);
// cipher.init((mode==ENCRYPT_MODE?
// javax.crypto.Cipher.ENCRYPT_MODE:
// javax.crypto.Cipher.DECRYPT_MODE),
// _key, new IvParameterSpec(iv));
cipher = (mode == ENCRYPT_MODE ?
triDes.CreateEncryptor(key, iv) :
triDes.CreateDecryptor(key, iv));
}
catch (Exception e)
{
Console.WriteLine(e);
cipher = null;
}
}
