diff options
| author | Ricco Mandahl Jørgensen <riccojorgensen@gmail.com> | 2018-03-13 12:53:24 +0100 |
|---|---|---|
| committer | Ricco Mandahl Jørgensen <riccojorgensen@gmail.com> | 2018-03-13 12:53:24 +0100 |
| commit | 54749b4012cddd9e80f26971dcf45fc352aead26 (patch) | |
| tree | d7b08ab3ff8c0196a0041fa10abeed1a769a514d /PasswordCrackerDistributed/PasswordCrackerServer/PasswordFileHandler.cs | |
First Commit
Diffstat (limited to 'PasswordCrackerDistributed/PasswordCrackerServer/PasswordFileHandler.cs')
| -rw-r--r-- | PasswordCrackerDistributed/PasswordCrackerServer/PasswordFileHandler.cs | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/PasswordCrackerDistributed/PasswordCrackerServer/PasswordFileHandler.cs b/PasswordCrackerDistributed/PasswordCrackerServer/PasswordFileHandler.cs new file mode 100644 index 0000000..8c0780c --- /dev/null +++ b/PasswordCrackerDistributed/PasswordCrackerServer/PasswordFileHandler.cs @@ -0,0 +1,79 @@ +using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Security.Cryptography;
+
+namespace PasswordCrackerServer
+{
+ class PasswordFileHandler
+ {
+ private static readonly Converter<char, byte> Converter = CharToByte;
+
+ /// <summary>
+ /// With this method you can make you own password file
+ /// </summary>
+ /// <param name="filename">Name of password file</param>
+ /// <param name="usernames">List of usernames</param>
+ /// <param name="passwords">List of passwords in clear text</param>
+ /// <exception cref="ArgumentException">if usernames and passwords have different lengths</exception>
+ public static void WritePasswordFile(String filename, String[] usernames, String[] passwords)
+ {
+ HashAlgorithm messageDigest = new SHA1CryptoServiceProvider();
+ if (usernames.Length != passwords.Length)
+ {
+ throw new ArgumentException("usernames and passwords must be same lengths");
+ }
+ using (FileStream fs = new FileStream(filename, FileMode.CreateNew, FileAccess.Write))
+ using (StreamWriter sw = new StreamWriter(fs))
+ {
+ for (int i = 0; i < usernames.Length; i++)
+ {
+ byte[] passwordAsBytes = Array.ConvertAll(passwords[i].ToCharArray(), GetConverter());
+ byte[] encryptedPassword = messageDigest.ComputeHash(passwordAsBytes);
+ String line = usernames[i] + ":" + Convert.ToBase64String(encryptedPassword) + "\n";
+ sw.WriteLine(line);
+ }
+ }
+ }
+
+ /// <summary>
+ /// Reads all the username + encrypted password from the password file
+ /// </summary>
+ /// <param name="filename">the name of the password file</param>
+ /// <returns>A list of (username, encrypted password) pairs</returns>
+ public static List<UserInfo> ReadPasswordFile(String filename)
+ {
+ List<UserInfo> result = new List<UserInfo>();
+
+ FileStream fs = new FileStream(filename, FileMode.Open, FileAccess.Read);
+ using (StreamReader sr = new StreamReader(fs))
+ {
+
+ while (!sr.EndOfStream)
+ {
+ String line = sr.ReadLine();
+ String[] parts = line.Split(":".ToCharArray());
+ UserInfo userInfo = new UserInfo(parts[0], parts[1]);
+ result.Add(userInfo);
+ }
+ return result;
+ }
+ }
+
+ public static Converter<char, byte> GetConverter()
+ {
+ return Converter;
+ }
+
+ /// <summary>
+ /// Converting a char to a byte can be done in many ways.
+ /// This is one way ...
+ /// </summary>
+ /// <param name="ch"></param>
+ /// <returns></returns>
+ private static byte CharToByte(char ch)
+ {
+ return Convert.ToByte(ch);
+ }
+ }
+}
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