[英]Convert PHP encryption code to C#
I'm trying to convert this piece of code from PHP to C#. 我正在尝试将这段代码从PHP转换为C#。 It's part of a Captive Portal. 它是强制门户的一部分。 Could somebody explain what it does? 有人可以解释它的作用吗?
$hexchal = pack ("H32", $challenge);
if ($uamsecret) {
$newchal = pack ("H*", md5($hexchal . $uamsecret));
} else {
$newchal = $hexchal;
}
$response = md5("\0" . $password . $newchal);
$newpwd = pack("a32", $password);
$pappassword = implode ("", unpack("H32", ($newpwd ^ $newchal)));
Eduardo, 爱德华多,
if you take a look at the pack manual, pack
is used to convert a string in (hex, octal, binary )to his number representation. 如果您看一下pack手册, pack
是用来将一个字符串(十六进制,八进制,二进制)转换为其数字表示形式的。
so 所以
$hexcal = pack('H32', $challenge);
would convert a string like 'cca86bc64ec5889345c4c3d8dfc7ade9' to the actual 0xcca... de9 会将“ cca86bc64ec5889345c4c3d8dfc7ade9”之类的字符串转换为实际的0xcca ... de9
if $uamsecret exist do the same things with the MD5 of hexchal
concacteate with the uamsecret
. 如果$ uamsecret存在,则用hexchal
的MD5和uamsecret进行uamsecret
。 if ($uamsecret) { $newchal = pack ("H*", md5($hexchal . $uamsecret)); if($ uamsecret){$ newchal = pack(“ H *”,md5($ hexchal。$ uamsecret)); } else { $newchal = $hexchal; } else {$ newchal = $ hexchal; } }
$response = md5("\0" . $password . $newchal);
MD% '\\0' + $password + $newchal MD%'\\ 0'+ $ password + $ newchal
$newpwd = pack("a32", $password);
pad password
to 32 byte password
为32字节
$pappassword = implode ("", unpack("H32", ($newpwd ^ $newchal)));
do a xor newpwd
and newchal
and convert it to a hexadecimal string, I don't get the implode()
maybe it's to convert to string to an array of character. 执行xor newpwd
和newchal
并将其转换为十六进制字符串,我没有得到implode()
也许是将其转换为字符串转换为字符数组。
I also encountered the need of php's pack-unpack functions in c# but did not get any good resource. 我也遇到了C#中php的pack-unpack函数的需要,但没有得到任何好的资源。
So i thought to do it myself. 所以我想自己做。 I have verified the function's input with pack/unpack/md5 methods found at onlinephpfunctions.com. 我已经使用onlinephpfunctions.com上的pack / unpack / md5方法验证了该函数的输入。 Since i have done code only as per my requirements. 由于我仅根据我的要求完成了代码。 This can be extended for other formats 可以扩展为其他格式
Pack 包
private static string pack(string input)
{
//only for H32 & H*
return Encoding.Default.GetString(FromHex(input));
}
public static byte[] FromHex(string hex)
{
hex = hex.Replace("-", "");
byte[] raw = new byte[hex.Length / 2];
for (int i = 0; i < raw.Length; i++)
{
raw[i] = Convert.ToByte(hex.Substring(i * 2, 2), 16);
}
return raw;
}
MD5 MD5
private static string md5(string input)
{
byte[] asciiBytes = Encoding.Default.GetBytes(input);
byte[] hashedBytes = MD5CryptoServiceProvider.Create().ComputeHash(asciiBytes);
string hashedString = BitConverter.ToString(hashedBytes).Replace("-", "").ToLower();
return hashedString;
}
Unpack 解压
private static string unpack(string p1, string input)
{
StringBuilder output = new StringBuilder();
for (int i = 0; i < input.Length; i++)
{
string a = Convert.ToInt32(input[i]).ToString("X");
output.Append(a);
}
return output.ToString();
}
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