C# 实现java工具类里的（SecureUtil.desede(key.getBytes()).encryptBase64(“******-******） DeSede| DES3 ECB模式加密

我对接的是utf8格式的密文；
加密输入：
System.Text.Encoding utf8 = System.Text.Encoding.UTF8;
byte[] key = utf8.GetBytes(“553036673260679053756666”);//秘钥
byte[] data = utf8.GetBytes(tempInfo);//数据
返回处理：
Convert.ToBase64String( TripleDes.Des3EncodeECB(key, iv, data))

#region ECB模式
///
/// DES3 ECB模式加密
///
/// 密钥
/// IV(当模式为ECB时，IV无用)
/// 明文的byte数组
/// 密文的byte数组
public static byte[] Des3EncodeECB(byte[] key, byte[] iv, byte[] data)
{
try
{
// Create a MemoryStream.
MemoryStream mStream = new MemoryStream();
TripleDESCryptoServiceProvider tdsp = new TripleDESCryptoServiceProvider();
tdsp.Mode = CipherMode.ECB;
tdsp.Padding = PaddingMode.PKCS7;
// Create a CryptoStream using the MemoryStream
// and the passed key and initialization vector (IV).
CryptoStream cStream = new CryptoStream(mStream,
tdsp.CreateEncryptor(key, iv),
CryptoStreamMode.Write);
// Write the byte array to the crypto stream and flush it.
cStream.Write(data, 0, data.Length);
cStream.FlushFinalBlock();
// Get an array of bytes from the
// MemoryStream that holds the
// encrypted data.
byte[] ret = mStream.ToArray();
// Close the streams.
cStream.Close();
mStream.Close();
// Return the encrypted buffer.
return ret;
}
catch (CryptographicException e)
{
Console.WriteLine(“A Cryptographic error occurred: {0}”, e.Message);
return null;
}
}
///
/// DES3 ECB模式解密
///
/// 密钥
/// IV(当模式为ECB时，IV无用)
/// 密文的byte数组
/// 明文的byte数组
public static byte[] Des3DecodeECB(byte[] key, byte[] iv, byte[] data)
{
try
{
// Create a new MemoryStream using the passed
// array of encrypted data.
MemoryStream msDecrypt = new MemoryStream(data);
TripleDESCryptoServiceProvider tdsp = new TripleDESCryptoServiceProvider();
tdsp.Mode = CipherMode.ECB;
tdsp.Padding = PaddingMode.PKCS7;
// Create a CryptoStream using the MemoryStream
// and the passed key and initialization vector (IV).
CryptoStream csDecrypt = new CryptoStream(msDecrypt,
tdsp.CreateDecryptor(key, iv),
CryptoStreamMode.Read);
// Create buffer to hold the decrypted data.
byte[] fromEncrypt = new byte[data.Length];
// Read the decrypted data out of the crypto stream
// and place it into the temporary buffer.
csDecrypt.Read(fromEncrypt, 0, fromEncrypt.Length);
//Convert the buffer into a string and return it.
return fromEncrypt;
}
catch (CryptographicException e)
{
Console.WriteLine(“A Cryptographic error occurred: {0}”, e.Message);
return null;
}
}
#endregion