36 lines
1.2 KiB
C#
36 lines
1.2 KiB
C#
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using System;
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using System.IO;
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using System.Security.Cryptography;
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using System.Text;
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namespace SharpChat {
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public static class Extensions {
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public static string GetSignedHash(this string str, string key = null)
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=> Encoding.UTF8.GetBytes(str).GetSignedHash(key);
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public static string GetSignedHash(this byte[] bytes, string key = null) {
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if (key == null)
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key = File.Exists(@"login_key.txt") ? File.ReadAllText(@"login_key.txt") : @"woomy";
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StringBuilder sb = new StringBuilder();
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using (HMACSHA256 algo = new HMACSHA256(Encoding.UTF8.GetBytes(key))) {
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byte[] hash = algo.ComputeHash(bytes);
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foreach (byte b in hash)
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sb.AppendFormat(@"{0:x2}", b);
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}
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return sb.ToString();
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}
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public static string GetIdString(this byte[] buffer) {
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const string id_chars = @"abcdefghijklmnopqrstuvwxyz0123456789-_ABCDEFGHIJKLMNOPQRSTUVWXYZ";
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StringBuilder sb = new StringBuilder();
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foreach(byte b in buffer)
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sb.Append(id_chars[b % id_chars.Length]);
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return sb.ToString();
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}
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}
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}
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