wiz0u/WTelegramClient
1
0
Fork 0
mirror of https://github.com/wiz0u/WTelegramClient.git synced 2025-12-06 06:52:01 +01:00
Code Issues Actions Packages Projects Releases Wiki Activity

Remove dependencies on Microsoft.Bcl.HashCode & System.Formats.Asn1

Browse source
This commit is contained in:
Wizou 2022-02-22 11:50:55 +01:00
parent bdbf17aa07
commit 902a37443f
1 changed files with 2 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

4
src/Compat.cs
View file

@ -1,4 +1,5 @@
using System;
using System.Buffers.Binary;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
@ -61,14 +62,13 @@ namespace WTelegram
return new IPEndPoint(IPAddress.Parse(addr[0..colon]), int.Parse(addr[(colon + 1)..]));
}
private static readonly byte[] PemStart = new byte[] { 0x30, 0x82, 0x01, 0x0A, 0x02, 0x82, 0x01, 0x01 };
internal static void ImportFromPem(this RSA rsa, string pem)
{
var header = pem.IndexOf("-----BEGIN RSA PUBLIC KEY-----");
var footer = pem.IndexOf("-----END RSA PUBLIC KEY-----");
if (header == -1 || footer <= header) throw new ArgumentException("Invalid RSA Public Key");
byte[] bytes = System.Convert.FromBase64String(pem[(header+30)..footer]);
if (bytes.Length != 270 || !bytes.Take(8).SequenceEqual(PemStart) || bytes[265] != 0x02 || bytes[266] != 0x03)
if (bytes.Length != 270 || BinaryPrimitives.ReadInt64BigEndian(bytes) != 0x3082010A02820101 || bytes[265] != 0x02 || bytes[266] != 0x03)
throw new ArgumentException("Unrecognized sequence in RSA Public Key");
rsa.ImportParameters(new RSAParameters { Modulus = bytes[8..265], Exponent = bytes[267..270] });
}