DEC加密和解密
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2024-03-14 15:38:28
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/// <summary>
/// DEC 加密过程
/// </summary>
/// <param name="pToEncrypt">被加密的字符串</param>
/// <param name="sKey">**(只支持8个字节的**)</param>
/// <returns>加密后的字符串</returns>
public static string Encrypt(string pToEncrypt, string sKey)
{
//访问数据加密标准(DES)算法的加密服务提供程序 (CSP) 版本的包装对象
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
des.Key = ASCIIEncoding.ASCII.GetBytes(sKey); //建立加密对象的**和偏移量
des.IV = ASCIIEncoding.ASCII.GetBytes(sKey); //原文使用ASCIIEncoding.ASCII方法的GetBytes方法
byte[] inputByteArray = Encoding.Default.GetBytes(pToEncrypt);//把字符串放到byte数组中
MemoryStream ms = new MemoryStream();//创建其支持存储区为内存的流
//定义将数据流链接到加密转换的流
CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(), CryptoStreamMode.Write);
cs.Write(inputByteArray, 0, inputByteArray.Length);
cs.FlushFinalBlock();
//上面已经完成了把加密后的结果放到内存中去
StringBuilder ret = new StringBuilder();
foreach (byte b in ms.ToArray())
{
ret.AppendFormat("{0:X2}", b);
}
ret.ToString();
return ret.ToString();
}
/// <summary>
/// DEC 解密过程
/// </summary>
/// <param name="pToDecrypt">被解密的字符串</param>
/// <param name="sKey">**(只支持8个字节的**,同前面的加***相同)</param>
/// <returns>返回被解密的字符串</returns>
public static string Decrypt(string pToDecrypt, string sKey)
{
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
byte[] inputByteArray = new byte[pToDecrypt.Length / 2];
for (int x = 0; x < pToDecrypt.Length / 2; x++)
{
int i = (Convert.ToInt32(pToDecrypt.Substring(x * 2, 2), 16));
inputByteArray[x] = (byte)i;
}
des.Key = ASCIIEncoding.ASCII.GetBytes(sKey); //建立加密对象的**和偏移量,此值重要,不能修改
des.IV = ASCIIEncoding.ASCII.GetBytes(sKey);
MemoryStream ms = new MemoryStream();
CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write);
cs.Write(inputByteArray, 0, inputByteArray.Length);
cs.FlushFinalBlock();
//建立StringBuild对象,createDecrypt使用的是流对象,必须把解密后的文本变成流对象
StringBuilder ret = new StringBuilder();
return System.Text.Encoding.Default.GetString(ms.ToArray());
}
/// <summary>
/// 密码加密过程
/// </summary>
/// <param name="pwd">密码</param>
/// <returns>加密后的字符串</returns>
public static string pwdEncrypt(string pwd)
{
string pwdJm = Encrypt(pwd, "ABCQiS88");
return pwdJm;
}
/// <summary>
/// 密码加密过程
/// </summary>
/// <param name="pwd">密码</param>
/// <returns>加密后的字符串</returns>
public static string pwdDecrypt(string pwd)
{
string pwdJm = Decrypt(pwd, "ABCQiS88");
return pwdJm;
}
一般处理程序调用:String txtPwdD5 = sqlhelper.pwdEncrypt(admin_Password);