【标 题】：關於.net的加解密密碼的代碼
【关键字】：.net
【来 源】：http://blog.csdn.net/xiwang6428/archive/2006/10/21/1344063.aspx
/**//// <summary>
/// DES加密字串,并返回加密后的字串
/// </summary>
/// <param name="data">要加密的字串</param>
/// <returns></returns>
public static string EncryptData(string data)
...{
byte[] byKey = System.Text.ASCIIEncoding.ASCII.GetBytes(KEY_64);
byte[] byIV = System.Text.ASCIIEncoding.ASCII.GetBytes(IV_64);
DESCryptoServiceProvider cryptoProvider = new DESCryptoServiceProvider();
int i = cryptoProvider.KeySize;
MemoryStream ms = new MemoryStream();
CryptoStream cst = new CryptoStream(ms, cryptoProvider.CreateEncryptor(byKey, byIV), CryptoStreamMode.Write);
StreamWriter sw = new StreamWriter(cst);
sw.Write(data);
sw.Flush();
cst.FlushFinalBlock();
sw.Flush();
return Convert.ToBase64String(ms.GetBuffer(), 0, (int)ms.Length);
}
/**//// <summary>
/// DES解密字串,并返回解密還原好的字串
/// </summary>
/// <param name="data">要解密的字串</param>
/// <returns></returns>
public static string DecryptData(string data)
...{
byte[] byKey = System.Text.ASCIIEncoding.ASCII.GetBytes(KEY_64);
byte[] byIV = System.Text.ASCIIEncoding.ASCII.GetBytes(IV_64);
byte[] byEnc;
try
...{
byEnc = Convert.FromBase64String(data);
}
catch
...{
return null;
}
DESCryptoServiceProvider cryptoProvider = new DESCryptoServiceProvider();
MemoryStream ms = new MemoryStream(byEnc);
CryptoStream cst = new CryptoStream(ms,cryptoProvider.CreateDecryptor (byKey,byIV),CryptoStreamMode.Read);
StreamReader sr = new StreamReader(cst);
return sr.ReadToEnd();
}
【关键字】：.net
【来 源】：http://blog.csdn.net/xiwang6428/archive/2006/10/21/1344063.aspx
關於.net的加解密密碼的代碼
上星期在社區的時候,我問了好久有關的加解密代碼的問題,結果都沒人能解決. 不得已, 只好自己解決了,以下的代碼:
/**//// <summary> /// DES加密字串,并返回加密后的字串 /// </summary> /// <param name="data">要加密的字串</param> /// <returns></returns> public static string EncryptData(string data) ...{ byte[] byKey = System.Text.ASCIIEncoding.ASCII.GetBytes(KEY_64); byte[] byIV = System.Text.ASCIIEncoding.ASCII.GetBytes(IV_64); DESCryptoServiceProvider cryptoProvider = new DESCryptoServiceProvider(); int i = cryptoProvider.KeySize; MemoryStream ms = new MemoryStream(); CryptoStream cst = new CryptoStream(ms, cryptoProvider.CreateEncryptor(byKey, byIV), CryptoStreamMode.Write); StreamWriter sw = new StreamWriter(cst); sw.Write(data); sw.Flush(); cst.FlushFinalBlock(); sw.Flush(); return Convert.ToBase64String(ms.GetBuffer(), 0, (int)ms.Length); } /**//// <summary> /// DES解密字串,并返回解密還原好的字串 /// </summary> /// <param name="data">要解密的字串</param> /// <returns></returns> public static string DecryptData(string data) ...{ byte[] byKey = System.Text.ASCIIEncoding.ASCII.GetBytes(KEY_64); byte[] byIV = System.Text.ASCIIEncoding.ASCII.GetBytes(IV_64); byte[] byEnc; try ...{ byEnc = Convert.FromBase64String(data); } catch ...{ return null; } DESCryptoServiceProvider cryptoProvider = new DESCryptoServiceProvider(); MemoryStream ms = new MemoryStream(byEnc); CryptoStream cst = new CryptoStream(ms,cryptoProvider.CreateDecryptor (byKey,byIV),CryptoStreamMode.Read); StreamReader sr = new StreamReader(cst); return sr.ReadToEnd(); }注意:密碼和向量的字節數要相同,否則加密后的密碼不能再解密.這是問題的關鍵
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