public static string Decrypt(string key, string value)
{
EncrypEntity entity = new EncrypEntity();
if (!string.IsNullOrEmpty(key))
{
entity.Key = key;
}
entity.Value = value;
return(Decrypt(entity));
}
/// <summary>
/// 解密
/// </summary>
/// <param name="txt"></param>
/// <returns></returns>
public static string Decrypt(EncrypEntity entity)
{
string txt = entity.Value;
int len = txt.Length;
byte[] bs = new byte[len / 2];
// 16进制数组转换会byte数组
for (int i = 0; i < len / 2; i++)
{
bs[i] = (byte)(Convert.ToInt32(txt.Substring(i * 2, 2), 16));
}
byte[] keys = entity.Encoding.GetBytes(entity.Key); // 密钥转换成字节数组
// 异或
for (int i = 0; i < bs.Length; i++)
{
bs[i] = (byte)(bs[i] ^ keys[i % keys.Length]);
}
// byte数组还原成字符串
return(entity.Encoding.GetString(bs));
}
/// <summary>
/// 加密
/// </summary>
/// <param name="txt"></param>
/// <returns></returns>
public static string Encrypt(EncrypEntity entity)
{
StringBuilder sb = new StringBuilder();
string encryptKey = entity.Key;
Encoding encoding = entity.Encoding;
byte[] bs = encoding.GetBytes(entity.Value); // 原字符串转换成字节数组
byte[] keys = encoding.GetBytes(encryptKey); // 密钥转换成字节数组
// 异或
for (int i = 0; i < bs.Length; i++)
{
bs[i] = (byte)(bs[i] ^ keys[i % keys.Length]);
}
// 编码成16进制数组
foreach (byte b in bs)
{
sb.AppendFormat("{0:X2}", b);
}
return(sb.ToString());
}
public static string Encrypt(string value)
{
EncrypEntity entity = new EncrypEntity(value);
return(Encrypt(entity));
}