c#MD5加密和解密
- using System.Security.Cryptography;
- using System.IO;
- using System.Text;
-
- ///MD5加密
- public string MD5Encrypt(string pToEncrypt, string sKey)
- {
- 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();
- StringBuilder ret = new StringBuilder();
- foreach(byte b in ms.ToArray())
- {
- ret.AppendFormat("{0:X2}", b);
- }
- ret.ToString();
- return ret.ToString();
-
-
- }
-
- ///MD5解密
- public string MD5Decrypt(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);
- 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();
-
- StringBuilder ret = new StringBuilder();
-
- return System.Text.Encoding.Default.GetString(ms.ToArray());
- }