/// <summary>
/// 使用 变形的 rc4 编码方法对字符串进行加密或者解密
/// </summary>
/// <param name="source">原始字符串</param>
/// <param name="key">密钥</param>
/// <param name="operation">操作 加密还是解密</param>
/// <param name="expiry">加密字串过期时间</param>
/// <returns>加密或者解密后的字符串</returns>
private static string DiscuzAuthcode(string source, string key, DiscuzAuthcodeMode operation, int expiry)
{
if (source == null || key == null)
{
return "";
}
int ckey_length = 4;
string keya, keyb, keyc, cryptkey, result;
string timestamp = UnixTimestamp();
key = MD5(key);
keya = MD5(CutString(key, 0, 16));
keyb = MD5(CutString(key, 16, 16));
keyc = ckey_length > 0 ? (operation == DiscuzAuthcodeMode.Decode ? CutString(source, 0, ckey_length) : RandomString(ckey_length)) : "";
cryptkey = keya + MD5(keya + keyc);
if (operation == DiscuzAuthcodeMode.Decode)
{
byte[] temp;
try
{
temp = System.Convert.FromBase64String(CutString(source, ckey_length));
}
catch
{
try
{
temp = System.Convert.FromBase64String(CutString(source + "=", ckey_length));
}
catch
{
try
{
temp = System.Convert.FromBase64String(CutString(source + "==", ckey_length));
}
catch
{
return "";
}
}
}
result = System.Text.Encoding.Default.GetString(RC4(temp, cryptkey));
if (CutString(result, 10, 16) == CutString(MD5(CutString(result, 26) + keyb), 0, 16))
{
return CutString(result, 26);
}
else
{
return "";
}
}
else
{
source = "0000000000" + CutString(MD5(source + keyb), 0, 16) + source;
byte[] temp = RC4(System.Text.Encoding.Default.GetBytes(source), cryptkey);
return keyc + System.Convert.ToBase64String(temp);
}
}
/// <summary>
/// 使用 变形的 rc4 编码方法对字符串进行加密或者解密
/// </summary>
/// <param name="source">原始字符串</param>
/// <param name="key">密钥</param>
/// <param name="operation">操作 加密还是解密</param>
/// <param name="expiry">密文有效期, 加密时候有效， 单 位 秒，0 为永久有效</param>
/// <returns>加密或者解密后的字符串</returns>
private static string DiscuzAuthcode(string source, string key, DiscuzAuthcodeMode operation, int expiry)
{
if (source == null || key == null)
{
return("");
}
int ckey_length = 4;
string keya, keyb, keyc, cryptkey, result;
key = MD5(key);
keya = MD5(CutString(key, 0, 16));
keyb = MD5(CutString(key, 16, 16));
keyc = ckey_length > 0 ? (operation == DiscuzAuthcodeMode.Decode ? CutString(source, 0, ckey_length) : RandomString(ckey_length)) : "";
cryptkey = keya + MD5(keya + keyc);
if (operation == DiscuzAuthcodeMode.Decode)
{
byte[] temp;
try
{
temp = System.Convert.FromBase64String(CutString(source, ckey_length));
}
catch
{
try
{
temp = System.Convert.FromBase64String(CutString(source + "=", ckey_length));
}
catch
{
try
{
temp = System.Convert.FromBase64String(CutString(source + "==", ckey_length));
}
catch
{
return("");
}
}
}
result = encoding.GetString(RC4(temp, cryptkey));
//throw new Exception(CutString(result, 0, 10));
long timestamp = long.Parse(CutString(result, 0, 10));
if ((timestamp == 0 || timestamp - UnixTimestamp() > 0) && CutString(result, 10, 16) == CutString(MD5(CutString(result, 26) + keyb), 0, 16))
{
return(CutString(result, 26));
}
else
{
return("");
}
}
else
{
source = (expiry == 0 ? "0000000000" : (expiry + UnixTimestamp()).ToString()) + CutString(MD5(source + keyb), 0, 16) + source;
byte[] temp = RC4(encoding.GetBytes(source), cryptkey);
return(keyc + System.Convert.ToBase64String(temp));
}
}
/// <summary>
/// 使用 变形的 rc4 编码方法对字符串进行加密或者解密
/// </summary>
/// <param name="source">原始字符串</param>
/// <param name="key">密钥</param>
/// <param name="operation">操作 加密还是解密</param>
/// <param name="expiry">加密字串过期时间</param>
/// <returns>加密或者解密后的字符串</returns>
private static string DiscuzAuthcode(string source, string key, DiscuzAuthcodeMode operation, int expiry)
{
source = System.Web.HttpUtility.UrlDecode(source);
if (source == null || key == null)
{
return("");
}
int ckey_length = 4;
string keya, keyb, keyc, cryptkey, result;
string timestamp = UnixTimestamp();
key = MD5.Encrypt(key);
keya = MD5.Encrypt(CutString(key, 0, 16));
keyb = MD5.Encrypt(CutString(key, 16, 16));
keyc = ckey_length > 0 ? (operation == DiscuzAuthcodeMode.Decode ? CutString(source, 0, ckey_length) : RandomString(ckey_length)) : "";
cryptkey = keya + MD5.Encrypt(keya + keyc);
if (operation == DiscuzAuthcodeMode.Decode)
{
byte[] temp;
try
{
temp = System.Convert.FromBase64String(CutString(source, ckey_length));
}
catch
{
try
{
temp = System.Convert.FromBase64String(CutString(source + "=", ckey_length));
}
catch
{
try
{
temp = System.Convert.FromBase64String(CutString(source + "==", ckey_length));
}
catch
{
return("");
}
}
}
result = System.Text.Encoding.Default.GetString(RC4(temp, cryptkey));
if (CutString(result, 10, 16) == CutString(MD5.Encrypt(CutString(result, 26) + keyb), 0, 16))
{
return(CutString(result, 26));
}
else
{
return("");
}
}
else
{
source = "0000000000" + CutString(MD5.Encrypt(source + keyb), 0, 16) + source;
byte[] temp = RC4(System.Text.Encoding.Default.GetBytes(source), cryptkey);
return(keyc + System.Convert.ToBase64String(temp));
}
}
/// <summary>
/// 使用 变形的 rc4 编码方法对字符串进行加密或者解密
/// </summary>
/// <param name="source">原始字符串</param>
/// <param name="key">密钥</param>
/// <param name="operation">操作 加密还是解密</param>
/// <returns>加密或者解密后的字符串</returns>
private static string DiscuzAuthcode(string source, string key, DiscuzAuthcodeMode operation)
{
if (source == null || key == null)
{
return "";
}
const int ckeyLength = 7;
key = key.Hash(new MD5CryptoServiceProvider()).ToLower();
string keya = CutString(key, 0, 16).Hash(new MD5CryptoServiceProvider()).ToLower();
string keyb = CutString(key, 16, 16).Hash(new MD5CryptoServiceProvider()).ToLower();
string keyc = (operation == DiscuzAuthcodeMode.Decode ? CutString(source, 0, ckeyLength) : StringGenerator.GetRandomizer(ckeyLength, true, true, true, true));
string cryptkey = keya + (keya + keyc).Hash(new MD5CryptoServiceProvider()).ToLower();
if (operation == DiscuzAuthcodeMode.Decode)
{
byte[] temp;
try
{
temp = Convert.FromBase64String(CutString(source, ckeyLength));
}
catch
{
try
{
temp = Convert.FromBase64String(CutString(source + "=", ckeyLength));
}
catch
{
try
{
temp = Convert.FromBase64String(CutString(source + "==", ckeyLength));
}
catch
{
return "";
}
}
}
string result = Encoding.Default.GetString(RC4(temp, cryptkey));
return CutString(result, 10, 16) == CutString((CutString(result, 26) + keyb).Hash(new MD5CryptoServiceProvider()).ToLower(), 0, 16) ? CutString(result, 26) : "";
}
else
{
source = "0000000000" + CutString((source + keyb).Hash(new MD5CryptoServiceProvider()).ToLower(), 0, 16) + source;
var temp = RC4(Encoding.Default.GetBytes(source), cryptkey);
return keyc + Convert.ToBase64String(temp);
}
}
private static string AuthCode(string source, string key, DiscuzAuthcodeMode operation, int expiry)
{
if (source == null || key == null)
{
return "";
}
int ckey_length = 4;
string keyb;
string keyc;
string cryptkey;
string result;
string timestamp = Utils.UnixTimestamp();
key = Utils.MD5(key);
string keya = Utils.MD5(Utils.CutString(key, 0, 16));
keyb = Utils.MD5(Utils.CutString(key, 16, 16));
keyc = ckey_length > 0
? (operation == DiscuzAuthcodeMode.Decode
? Utils.CutString(source, 0, ckey_length)
: Utils.RandomString(ckey_length))
: "";
cryptkey = keya + Utils.MD5(keya + keyc);
if (operation == DiscuzAuthcodeMode.Decode)
{
byte[] temp;
try
{
temp = Convert.FromBase64String(Utils.CutString(source, ckey_length));
}
catch
{
try
{
temp = Convert.FromBase64String(Utils.CutString(source + "=", ckey_length));
}
catch
{
try
{
temp = Convert.FromBase64String(Utils.CutString(source + "==", ckey_length));
}
catch
{
return "";
}
}
}
result = Encoding.Default.GetString(RC4(temp, cryptkey));
if (Utils.CutString(result, 10, 16) == Utils.CutString(Utils.MD5(Utils.CutString(result, 26) + keyb), 0, 16))
{
return Utils.CutString(result, 26);
}
else
{
return "";
}
}
else
{
source = "0000000000" + Utils.CutString(Utils.MD5(source + keyb), 0, 16) + source;
byte[] temp = RC4(Encoding.Default.GetBytes(source), cryptkey);
return keyc + Convert.ToBase64String(temp);
}
}
/// <summary>
/// 使用 变形的 rc4 编码方法对字符串进行加密或者解密
/// </summary>
/// <param name="source">原始字符串</param>
/// <param name="key">密钥</param>
/// <param name="operation">操作 加密还是解密</param>
/// <param name="expiry">密文有效期, 加密时候有效， 单 位 秒，0 为永久有效</param>
/// <returns>加密或者解密后的字符串</returns>
private static string DiscuzAuthcode(string source, string key, DiscuzAuthcodeMode operation, int expiry)
{
if (source == null || key == null)
{
return "";
}
int ckey_length = 4;
string keya, keyb, keyc, cryptkey, result;
key = MD5(key);
keya = MD5(CutString(key, 0, 16));
keyb = MD5(CutString(key, 16, 16));
keyc = ckey_length > 0 ? (operation == DiscuzAuthcodeMode.Decode ? CutString(source, 0, ckey_length) : RandomString(ckey_length)) : "";
cryptkey = keya + MD5(keya + keyc);
if (operation == DiscuzAuthcodeMode.Decode)
{
byte[] temp;
try
{
temp = System.Convert.FromBase64String(CutString(source, ckey_length));
}
catch
{
try
{
temp = System.Convert.FromBase64String(CutString(source + "=", ckey_length));
}
catch
{
try
{
temp = System.Convert.FromBase64String(CutString(source + "==", ckey_length));
}
catch
{
return "";
}
}
}
result = encoding.GetString(RC4(temp, cryptkey));
//throw new Exception(CutString(result, 0, 10));
long timestamp = long.Parse(CutString(result, 0, 10));
if ((timestamp == 0 || timestamp - UnixTimestamp() > 0) && CutString(result, 10, 16) == CutString(MD5(CutString(result, 26) + keyb), 0, 16))
{
return CutString(result, 26);
}
else
{
return "";
}
}
else
{
source = (expiry == 0 ? "0000000000" : (expiry + UnixTimestamp()).ToString()) + CutString(MD5(source + keyb), 0, 16) + source;
byte[] temp = RC4(encoding.GetBytes(source), cryptkey);
return keyc + System.Convert.ToBase64String(temp);
}
}
