/// <summary>
/// DES解密
/// </summary>
/// <param name="buffer">加密的数组</param>
/// <param name="password">密钥</param>
/// <param name="iv">解密矢量：只有在CBC解密模式下才适用</param>
/// <param name="cMode">运算模式</param>
/// <returns></returns>
public static byte[] DecryptDES(DESTYPE type, byte[] buffer, string password, CipherMode cMode = CipherMode.ECB, PaddingMode pMode = PaddingMode.Zeros, byte[] iv = null)
{
try
{
SymmetricAlgorithm des = null;
if (type == DESTYPE.DES)
{
des = new DESCryptoServiceProvider();
}
if (type == DESTYPE.TripleDES)
{
des = new TripleDESCryptoServiceProvider();
}
des.Key = Encoding.UTF8.GetBytes(password);
des.Mode = cMode;
des.Padding = pMode;
if (cMode == CipherMode.CBC)
{
des.IV = iv;
}
return(des.CreateDecryptor().TransformFinalBlock(buffer, 0, buffer.Length));
}
catch (Exception e)
{
throw e;
}
}
/// <summary>
/// DES解密成string
/// </summary>
/// <param name="buffer">加密的数组</param>
/// <param name="password">密钥</param>
/// <param name="iv">解密矢量：只有在CBC解密模式下才适用</param>
/// <param name="cMode">运算模式</param>
/// <returns></returns>
public static string DecryptDESToString(DESTYPE type, string base64text, string password, CipherMode cMode = CipherMode.ECB, PaddingMode pMode = PaddingMode.Zeros, byte[] iv = null)
{
return(Encoding.UTF8.GetString(DecryptDES(type, Convert.FromBase64String(base64text), password, cMode, pMode, iv)));
}
/// <summary>
/// DES解密Base64字符串成string
/// </summary>
/// <param name="buffer">加密的数组</param>
/// <param name="password">密钥</param>
/// <param name="iv">解密矢量：只有在CBC解密模式下才适用</param>
/// <param name="cMode">运算模式</param>
/// <returns></returns>
public static string DecryptDESToString(DESTYPE type, byte[] buffer, string password, CipherMode cMode = CipherMode.ECB, PaddingMode pMode = PaddingMode.Zeros, byte[] iv = null)
{
return(Encoding.UTF8.GetString(DecryptDES(type, buffer, password, cMode, pMode, iv)));
}
/// <summary>
/// DES加密成Base64
/// </summary>
/// <param name="buffer">加密数组</param>
/// <param name="password">加密的密码</param>
/// <param name="iv">密钥</param>
/// <param name="mode">运算模式</param>
/// <returns>Base64字符串</returns>
public static string EncryptDESToBase64(DESTYPE type, byte[] buffer, string password, CipherMode cMode = CipherMode.ECB, PaddingMode pMode = PaddingMode.Zeros, byte[] iv = null)
{
return(Convert.ToBase64String(EncryptDES(type, buffer, password, cMode, pMode, iv)));
}
