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加密： 调用时： Encrypt_DES16(“2AF349243535BCD3”, “1111111111111111”);
public static string Encrypt_DES16(string str_in_data, string str_DES_KEY) //数据为十六进制
{
try
{
byte[] shuju = new byte[8];
byte[] keys = new byte[8];
for (int i = 0; i < 8; i++)
{
shuju[i] = Convert.ToByte(str_in_data.Substring(i * 2, 2), 16);
keys[i] = Convert.ToByte(str_DES_KEY.Substring(i * 2, 2), 16);
}
DES desEncrypt = new DESCryptoServiceProvider();
desEncrypt.Mode = CipherMode.ECB;
//desEncrypt.Key = ASCIIEncoding.ASCII.GetBytes(str_DES_KEY);
desEncrypt.Key = keys;
byte[] Buffer;
Buffer = shuju;//ASCIIEncoding.ASCII.GetBytes(str_in_data);
ICryptoTransform transForm = desEncrypt.CreateEncryptor();
byte[] R;
R = transForm.TransformFinalBlock(Buffer, 0, Buffer.Length);
string return_str = "";
foreach (byte b in R)
{
return_str += b.ToString("X2");
}
return_str = return_str.Substring(0, 16);
return return_str;
}
catch (Exception e)
{
throw e;
}
}
解密：调用时： Encrypt_DES16(“C47EC89B0A247A47”, “1111111111111111”);
//DES解密
public static string Decrypt_DES16(string str_in_data, string str_DES_KEY)//数据和密钥为十六进制
{
byte[] shuju = new byte[8];
byte[] keys = new byte[8];
for (int i = 0; i < 8; i++)
{
shuju[i] = Convert.ToByte(str_in_data.Substring(i * 2, 2), 16);
keys[i] = Convert.ToByte(str_DES_KEY.Substring(i * 2, 2), 16);
}
DES desDecrypt = new DESCryptoServiceProvider();
desDecrypt.Mode = CipherMode.ECB;
desDecrypt.Key = keys;
desDecrypt.Padding = System.Security.Cryptography.PaddingMode.None;
byte[] Buffer = shuju;
ICryptoTransform transForm = desDecrypt.CreateDecryptor();
byte[] R;
R = transForm.TransformFinalBlock(Buffer, 0, Buffer.Length);
string return_str = "";
foreach (byte b in R)
{
return_str += b.ToString("X2");
}
return return_str;
}
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