来源:网络 | 2013-4-20 | (有1532人读过)
DES加密及解密的算法[常用密钥算法]
简单的使用: //--导入所需要的包 using System.IO; using System.Text; using System.Security.Cryptography; public static string Key = "DKMAB5DE";//加密密钥必须为8位 //加密算法 public static string MD5Encrypt(string pToEncrypt) { DESCryptoServiceProvider des = new DESCryptoServiceProvider(); byte[] inputByteArray = Encoding.Default.GetBytes(pToEncrypt); des.Key = ASCIIEncoding.ASCII.GetBytes(Key); des.IV = ASCIIEncoding.ASCII.GetBytes(Key); 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();
}
//解密算法 public static string MD5Decrypt(string pToDecrypt) { 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(Key); des.IV = ASCIIEncoding.ASCII.GetBytes(Key); 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.ASCII.GetString(ms.ToArray());
}
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