70 lines
1.5 KiB
C#
70 lines
1.5 KiB
C#
using System;
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using System.IO;
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using Org.BouncyCastle.Utilities;
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namespace Org.BouncyCastle.Crypto.Tls;
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public class UrlAndHash
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{
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protected readonly string mUrl;
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protected readonly byte[] mSha1Hash;
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public virtual string Url => mUrl;
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public virtual byte[] Sha1Hash => mSha1Hash;
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public UrlAndHash(string url, byte[] sha1Hash)
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{
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if (url == null || url.Length < 1 || url.Length >= 65536)
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{
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throw new ArgumentException("must have length from 1 to (2^16 - 1)", "url");
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}
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if (sha1Hash != null && sha1Hash.Length != 20)
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{
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throw new ArgumentException("must have length == 20, if present", "sha1Hash");
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}
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mUrl = url;
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mSha1Hash = sha1Hash;
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}
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public virtual void Encode(Stream output)
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{
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byte[] buf = Strings.ToByteArray(mUrl);
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TlsUtilities.WriteOpaque16(buf, output);
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if (mSha1Hash == null)
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{
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TlsUtilities.WriteUint8(0, output);
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return;
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}
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TlsUtilities.WriteUint8(1, output);
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output.Write(mSha1Hash, 0, mSha1Hash.Length);
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}
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public static UrlAndHash Parse(TlsContext context, Stream input)
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{
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byte[] array = TlsUtilities.ReadOpaque16(input);
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if (array.Length < 1)
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{
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throw new TlsFatalAlert(47);
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}
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string url = Strings.FromByteArray(array);
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byte[] sha1Hash = null;
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switch (TlsUtilities.ReadUint8(input))
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{
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case 0:
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if (TlsUtilities.IsTlsV12(context))
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{
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throw new TlsFatalAlert(47);
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}
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break;
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case 1:
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sha1Hash = TlsUtilities.ReadFully(20, input);
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break;
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default:
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throw new TlsFatalAlert(47);
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}
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return new UrlAndHash(url, sha1Hash);
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}
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}
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