128 lines
4.1 KiB
C#
128 lines
4.1 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Text;
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namespace MediaBrowser.Model.Cryptography
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{
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public class PasswordHash
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{
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//Defined from this hash storage spec
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//https://github.com/P-H-C/phc-string-format/blob/master/phc-sf-spec.md
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//$<id>[$<param>=<value>(,<param>=<value>)*][$<salt>[$<hash>]]
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public string Id;
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public Dictionary<string, string> Parameters = new Dictionary<string, string>();
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public string Salt;
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public byte[] SaltBytes;
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public string Hash;
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public byte[] HashBytes;
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public PasswordHash(string storageString)
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{
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string[] splitted = storageString.Split('$');
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Id = splitted[1];
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if (splitted[2].Contains("="))
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{
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foreach (string paramset in (splitted[2].Split(',')))
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{
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if (!String.IsNullOrEmpty(paramset))
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{
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string[] fields = paramset.Split('=');
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if (fields.Length == 2)
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{
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Parameters.Add(fields[0], fields[1]);
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}
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else
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{
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throw new Exception($"Malformed parameter in password hash string {paramset}");
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}
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}
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}
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if (splitted.Length == 5)
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{
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Salt = splitted[3];
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SaltBytes = ConvertFromByteString(Salt);
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Hash = splitted[4];
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HashBytes = ConvertFromByteString(Hash);
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}
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else
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{
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Salt = string.Empty;
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Hash = splitted[3];
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HashBytes = ConvertFromByteString(Hash);
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}
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}
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else
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{
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if (splitted.Length == 4)
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{
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Salt = splitted[2];
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SaltBytes = ConvertFromByteString(Salt);
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Hash = splitted[3];
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HashBytes = ConvertFromByteString(Hash);
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}
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else
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{
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Salt = string.Empty;
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Hash = splitted[2];
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HashBytes = ConvertFromByteString(Hash);
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}
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}
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}
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public PasswordHash(ICryptoProvider cryptoProvider)
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{
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Id = cryptoProvider.DefaultHashMethod;
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SaltBytes = cryptoProvider.GenerateSalt();
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Salt = ConvertToByteString(SaltBytes);
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}
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public static byte[] ConvertFromByteString(string byteString)
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{
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List<byte> Bytes = new List<byte>();
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for (int i = 0; i < byteString.Length; i += 2)
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{
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Bytes.Add(Convert.ToByte(byteString.Substring(i, 2),16));
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}
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return Bytes.ToArray();
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}
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public static string ConvertToByteString(byte[] bytes)
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{
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return BitConverter.ToString(bytes).Replace("-", "");
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}
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private string SerializeParameters()
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{
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string ReturnString = String.Empty;
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foreach (var KVP in Parameters)
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{
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ReturnString += String.Format(",{0}={1}", KVP.Key, KVP.Value);
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}
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if ((!string.IsNullOrEmpty(ReturnString)) && ReturnString[0] == ',')
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{
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ReturnString = ReturnString.Remove(0, 1);
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}
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return ReturnString;
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}
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public override string ToString()
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{
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string outString = "$" +Id;
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string paramstring = SerializeParameters();
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if (!string.IsNullOrEmpty(paramstring))
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{
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outString += $"${paramstring}";
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}
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if (!string.IsNullOrEmpty(Salt))
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{
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outString += $"${Salt}";
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}
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outString += $"${Hash}";
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return outString;
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}
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}
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}
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