/// <summary>
/// 标准的DES解密
/// </summary>
/// <param name="value">预解密值</param>
/// <returns>已解密值</returns>
public static string Decrypt(byte[] desKey, byte[] desIV, string value)
{
if (desKey.Length == 24) //3des
{
var crypto = new SymmetricCrypto(SymmetricMode.TripleDES, desKey, Encoding.ASCII);
crypto.Mode = CipherMode.ECB;
crypto.Padding = PaddingMode.PKCS7;
return(crypto.Decrypt(value));
}
else
{
using (DESCryptoServiceProvider cryptoProvider = new DESCryptoServiceProvider())
{
//从字符串转换为字节组
byte[] buffer = Convert.FromBase64String(value);
MemoryStream ms = new MemoryStream(buffer);
CryptoStream cs = new CryptoStream(ms, cryptoProvider.CreateDecryptor(desKey, desIV),
CryptoStreamMode.Read);
StreamReader sr = new StreamReader(cs);
return(sr.ReadToEnd());
}
}
}
public void EncodingIsSetCorrectly()
{
var crypto = new SymmetricCrypto(new Credential[0], Encoding.ASCII);
crypto.Encoding.Should().Be(Encoding.ASCII);
}
/// <summary>
/// Constructor
/// </summary>
/// <param name="symmetricEncryptionKey"></param>
protected EncryptBase(byte[] symmetricEncryptionKey)
{
_symmetricCrypto = new SymmetricCrypto(symmetricEncryptionKey);
}
public static void EncodingIsSetCorrectly()
{
var crypto = new SymmetricCrypto(Array.Empty <Credential>(), Encoding.ASCII);
crypto.Encoding.Should().Be(Encoding.ASCII);
}
