C# DES加解密
程序员文章站
2024-03-14 11:02:34
...
Key为八位字符串
/// <summary>
/// DES加密字符串
/// </summary>
/// <param name="pToEncrypt">待加密的字符串</param>
/// <param name="sKey">加***,要求为8位</param>
/// <returns>加密成功返回加密后的字符串,失败返回源串</returns>
public static string DesEncrypt(string pToEncrypt, string sKey)
{
StringBuilder ret = new StringBuilder();
try
{
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
byte[] inputByteArray = Encoding.Default.GetBytes(pToEncrypt);
des.Key = ASCIIEncoding.ASCII.GetBytes(sKey);
des.IV = ASCIIEncoding.ASCII.GetBytes(sKey);
MemoryStream ms = new MemoryStream();
CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(),CryptoStreamMode.Write);
cs.Write(inputByteArray, 0, inputByteArray.Length);
cs.FlushFinalBlock();
foreach (byte b in ms.ToArray())
{
ret.AppendFormat("{0:X2}", b);
}
return ret.ToString();
}
catch
{
return pToEncrypt;
}
}
/// <summary>
/// DES解密字符串
/// </summary>
/// <param name="pToDecrypt">待解密的字符串</param>
/// <param name="sKey">解***,要求为8位,和加***相同</param>
/// <returns>解密成功返回解密后的字符串,失败返源串</returns>
public static string DesDecrypt(string pToDecrypt, string sKey)
{
MemoryStream ms = new MemoryStream();
try
{
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);
des.IV = ASCIIEncoding.ASCII.GetBytes(sKey);
CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write);
cs.Write(inputByteArray, 0, inputByteArray.Length);
cs.FlushFinalBlock();
return System.Text.Encoding.Default.GetString(ms.ToArray());
}
catch
{
return pToDecrypt;
}
}
上一篇: [ACTF新生赛2020]easyre
下一篇: C# DES加解密