cPhpBB.cs:
Code: Select all
using System;
using System.Security.Cryptography;
using System.Text;
namespace phpBB
{
/// <summary>
/// Computes the phpBB/SubMD5 hash value for the input data using the implementation provided by http://openwall.com/phpass/ modified by http://www.phpbb.com/.
/// </summary>
/// <remarks>
/// Ported by Ryan Irecki
/// Website: http://www.digilitepc.net/
/// E-mail: razchek@gmail.com
/// </remarks>
class phpBBCryptoServiceProvider
{
/// <summary>
/// The encryption string base.
/// </summary>
private string itoa64 = "./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
/// <summary>
/// Compares the password string given with the hash retrieved from your database.
/// </summary>
/// <param name="password">Plaintext password.</param>
/// <param name="hash">Hash from a SQL database</param>
/// <returns>True if the password is correct, False otherwise.</returns>
public bool phpbbCheckHash(string password, string hash)
{
if (hash.Length == 34) return (hashCryptPrivate(ASCIIEncoding.ASCII.GetBytes(password), hash, itoa64) == hash);
return false;
}
/// <summary>
/// This function will return the resulting hash from the password string you specify.
/// </summary>
/// <param name="password">String to hash.</param>
/// <returns>Encrypted hash.</returns>
/// <remarks>
/// Although this will return the md5 for an older password, I have not added
/// support for older passwords, so they will not work with this class unless
/// I or someone else updates it.
/// </remarks>
public string phpbb_hash(string password)
{
// Generate a random string from a random number with the length of 6.
// You could use a static string instead, doesn't matter. E.g.
// byte[] random = ASCIIEncoding.ASCII.GetBytes("abc123");
byte[] random = ASCIIEncoding.ASCII.GetBytes(new Random().Next(100000, 999999).ToString());
string hash = hashCryptPrivate(ASCIIEncoding.ASCII.GetBytes(password), hashGensaltPrivate(random, itoa64), itoa64);
if (hash.Length == 34) return hash;
return sMD5(password);
}
/// <summary>
/// The workhorse that encrypts your hash.
/// </summary>
/// <param name="password">String to be encrypted. Use: ASCIIEncoding.ASCII.GetBytes();</param>
/// <param name="genSalt">Generated salt.</param>
/// <param name="itoa64">The itoa64 string.</param>
/// <returns>The encrypted hash ready to be compared.</returns>
/// <remarks>
/// password: Saves conversion inside the function, lazy coding really.
/// genSalt: Returns from hashGensaltPrivate(random, itoa64);
/// return: Compare with phpbbCheckHash(password, hash)
/// </remarks>
private string hashCryptPrivate(byte[] password, string genSalt, string itoa64)
{
string output = "*";
MD5CryptoServiceProvider md5 = new MD5CryptoServiceProvider();
if (!genSalt.StartsWith("$H$")) return output;
// $count_log2 = strpos($itoa64, $setting[3]);
int count_log2 = itoa64.IndexOf(genSalt[3]);
if (count_log2 < 7 || count_log2 > 30) return output;
int count = 1 << count_log2;
byte[] salt = ASCIIEncoding.ASCII.GetBytes(genSalt.Substring(4, 8));
if (salt.Length != 8) return output;
byte[] hash = md5.ComputeHash(Combine(salt, password));
do
{
hash = md5.ComputeHash(Combine(hash, password));
} while (count-- > 1);
output = genSalt.Substring(0, 12);
output += hashEncode64(hash, 16, itoa64);
return output;
}
/// <summary>
/// Private function to concat byte arrays.
/// </summary>
/// <param name="b1">Source array.</param>
/// <param name="b2">Array to add to the source array.</param>
/// <returns>Combined byte array.</returns>
private byte[] Combine(byte[] b1, byte[] b2)
{
byte[] retVal = new byte[b1.Length + b2.Length];
Array.Copy(b1, 0, retVal, 0, b1.Length);
Array.Copy(b2, 0, retVal, b1.Length, b2.Length);
return retVal;
}
/// <summary>
/// Encode the hash.
/// </summary>
/// <param name="input">The hash to encode.</param>
/// <param name="count">[This parameter needs documentation].</param>
/// <param name="itoa64">The itoa64 string.</param>
/// <returns>Encoded hash.</returns>
private string hashEncode64(byte[] input, int count, string itoa64)
{
string output = "";
int i = 0; int value = 0;
do
{
value = input[i++];
output += itoa64[value & 0x3f];
if (i < count) value |= input[i] << 8;
output += itoa64[(value >> 6) & 0x3f];
if (i++ >= count)
break;
if (i < count) value |= input[i] << 16;
output += itoa64[(value >> 12) & 0x3f];
if (i++ >= count)
break;
output += itoa64[(value >> 18) & 0x3f];
} while (i < count);
return output;
}
/// <summary>
/// Generate salt for hash generation.
/// </summary>
/// <param name="input">Any random information.</param>
/// <param name="itoa64">The itoa64 string.</param>
/// <returns>Generated salt string</returns>
private string hashGensaltPrivate(byte[] input, string itoa64)
{
int iteration_count_log2 = 6;
string output = "$H$";
output += itoa64[Math.Min(iteration_count_log2 + 5, 30)];
output += hashEncode64(input, 6, itoa64);
return output;
}
/// <summary>
/// Returns a hexadecimal string representation for the encrypted MD5 parameter.
/// </summary>
/// <param name="password">String to be encrypted.</param>
/// <returns>String</returns>
private string sMD5(string password)
{ return sMD5(password, false); }
/// <summary>
/// Returns a hexadecimal string representation for the encrypted MD5 parameter.
/// </summary>
/// <param name="password">String to be encrypted.</param>
/// <param name="raw">Whether or not to produce a raw string.</param>
/// <returns>String</returns>
private string sMD5(string password, bool raw)
{
MD5CryptoServiceProvider md5 = new MD5CryptoServiceProvider();
if (raw) return Encoding.ASCII.GetString(md5.ComputeHash(Encoding.ASCII.GetBytes(password)));
else return BitConverter.ToString(md5.ComputeHash(Encoding.ASCII.GetBytes(password))).Replace("-", "");
}
}
}
Call auth() from any function event. (e.g. button_click())
Code: Select all
void auth()
{
// Initialize the class
phpBBCryptoServiceProvider cPhpBB = new phpBBCryptoServiceProvider();
// Incase your curious. =)
//string localHash = cPhpBB.phpbb_hash("myPassword");
// remoteHash is a hash from your SQL database.
// getSQLhash is a function to query the database and retrieve that hash.
string remoteHash = getSQLhash("username");
// Set the result to see if the password matches or not.
bool result = cPhpBB.phpbbCheckHash("myPassword", remoteHash);
if(result) // If true, the password matches!
MessageBox.Show("Authentication successful.");
else // If false, the password does not!
MessageBox.Show("Authentication failed.");
}Code: Select all
void auth()
{
phpBBCryptoServiceProvider cPhpBB = new phpBBCryptoServiceProvider();
string remoteHash = "$H$9uAiKWrdcDomn7FEqujoPLYuBXvkzV0";
bool result = cPhpBB.phpbbCheckHash("q1w2e3", remoteHash);
if(result) MessageBox.Show("Authentication successful.");
else MessageBox.Show("Authentication failed.");
}Enjoy! If anyone needs any help with the C#, please post here. I'll keep an eye on the thread. =)
