c# DES加密与解密·· 转载
public string Encrypt(string stringToEncrypt, string sKey)
{
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
byte[] inputByteArray = Encoding.GetEncoding("UTF-8").GetBytes(stringToEncrypt);
des.Key = ASCIIEncoding.UTF8.GetBytes(sKey);
des.IV = ASCIIEncoding.UTF8.GetBytes(sKey);
MemoryStream ms = new MemoryStream();
CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(), CryptoStreamMode.Write);
cs.Write(inputByteArray, 0, inputByteArray.Length);
cs.FlushFinalBlock();
StringBuilder ret = new StringBuilder();
foreach (byte b in ms.ToArray())
{
ret.AppendFormat("{0:X2}", b);
}
ret.ToString();
return ret.ToString();
}
public string Decrypt(string stringToDecrypt, string sKey)
{
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
byte[] inputByteArray = new byte[stringToDecrypt.Length / 2];
for (int x = 0; x < stringToDecrypt.Length / 2; x++)
{
int i = (Convert.ToInt32(stringToDecrypt.Substring(x * 2, 2), 16));
inputByteArray[x] = (byte)i;
}
des.Key = ASCIIEncoding.UTF8.GetBytes(sKey);
des.IV = ASCIIEncoding.UTF8.GetBytes(sKey);
MemoryStream ms = new MemoryStream();
CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write);
cs.Write(inputByteArray, 0, inputByteArray.Length);
cs.FlushFinalBlock();
StringBuilder ret = new StringBuilder();
return System.Text.Encoding.Default.GetString(ms.ToArray());
}
//
publicsealedclass DESEncrypt
...{
private DESEncrypt()
...{
//
// TODO: 在此处添加构造函数逻辑
//
}
privatestaticstring key ="zhoufoxcn";
/**////<summary>
/// 对称加密解密的密钥
///</summary>
publicstaticstring Key
...{
get
...{
return key;
}
set
...{
key = value;
}
}
/**////<summary>
/// DES加密
///</summary>
///<param name="encryptString"></param>
///<returns></returns>
publicstaticstring DesEncrypt(string encryptString)
...{
byte[] keyBytes = Encoding.UTF8.GetBytes(key.Substring(0, 8));
byte[] keyIV = keyBytes;
byte[] inputByteArray = Encoding.UTF8.GetBytes(encryptString);
DESCryptoServiceProvider provider =new DESCryptoServiceProvider();
MemoryStream mStream =new MemoryStream();
CryptoStream cStream =new CryptoStream(mStream, provider.CreateEncryptor(keyBytes, keyIV), CryptoStreamMode.Write);
cStream.Write(inputByteArray, 0, inputByteArray.Length);
cStream.FlushFinalBlock();
return Convert.ToBase64String(mStream.ToArray());
}
/**////<summary>
/// DES解密
///</summary>
///<param name="decryptString"></param>
///<returns></returns>
publicstaticstring DesDecrypt(string decryptString)
...{
byte[] keyBytes = Encoding.UTF8.GetBytes(key.Substring(0, 8));
byte[] keyIV = keyBytes;
byte[] inputByteArray = Convert.FromBase64String(decryptString);
DESCryptoServiceProvider provider =new DESCryptoServiceProvider();
MemoryStream mStream =new MemoryStream();
CryptoStream cStream =new CryptoStream(mStream, provider.CreateDecryptor(keyBytes, keyIV), CryptoStreamMode.Write);
cStream.Write(inputByteArray, 0, inputByteArray.Length);
cStream.FlushFinalBlock();
return Encoding.UTF8.GetString(mStream.ToArray());
}
}
posted on 2013-11-26 20:17 Technology 阅读(202) 评论(0) 编辑 收藏 举报