DES加密代码

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public class DES

{

/// <summary>

/// 获取密钥

/// </summary>

private static string Key

{

get { return @"P@+#wG+Z"; }

}

/// <summary>

/// 获取向量

/// </summary>

private static string IV

{

get { return @"L%n67}G\Mk@k%:~Y"; }

}

/// <summary>

/// DES加密

/// </summary>

/// <param name="plainStr">明文字符串</param>

/// <returns>密文</returns>

public static string DESEncrypt(string plainStr)

{

byte[] bKey = Encoding.UTF8.GetBytes(Key);

byte[] bIV = Encoding.UTF8.GetBytes(IV);

byte[] byteArray = Encoding.UTF8.GetBytes(plainStr);

string encrypt = null;

DESCryptoServiceProvider des = new DESCryptoServiceProvider();

try

{

using (MemoryStream mStream = new MemoryStream())

{

using (CryptoStream cStream = new CryptoStream(mStream, des.CreateEncryptor(bKey, bIV), CryptoStreamMode.Write))

{

cStream.Write(byteArray, 0, byteArray.Length);

cStream.FlushFinalBlock();

encrypt = Convert.ToBase64String(mStream.ToArray());

}

catch { }

des.Clear();

return encrypt;

}

/// <summary>

/// DES解密

/// </summary>

/// <param name="encryptStr">密文字符串</param>

/// <returns>明文</returns>

public static string DESDecrypt(string encryptStr)

{

byte[] bKey = Encoding.UTF8.GetBytes(Key);

byte[] bIV = Encoding.UTF8.GetBytes(IV);

byte[] byteArray = Convert.FromBase64String(encryptStr);

string decrypt = null;

DESCryptoServiceProvider des = new DESCryptoServiceProvider();

try

{

using (MemoryStream mStream = new MemoryStream())

{

using (CryptoStream cStream = new CryptoStream(mStream, des.CreateDecryptor(bKey, bIV), CryptoStreamMode.Write))

{

cStream.Write(byteArray, 0, byteArray.Length);

cStream.FlushFinalBlock();

decrypt = Encoding.UTF8.GetString(mStream.ToArray());

}

catch { }

des.Clear();

return decrypt;

}