170 lines
3.6 KiB
C#
170 lines
3.6 KiB
C#
#if !BESTHTTP_DISABLE_ALTERNATE_SSL && (!UNITY_WEBGL || UNITY_EDITOR)
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#pragma warning disable
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using System;
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using System.IO;
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using BestHTTP.SecureProtocol.Org.BouncyCastle.Utilities;
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using BestHTTP.SecureProtocol.Org.BouncyCastle.Utilities.IO;
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namespace BestHTTP.SecureProtocol.Org.BouncyCastle.Asn1
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{
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internal class ConstructedOctetStream
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: BaseInputStream
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{
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private readonly Asn1StreamParser m_parser;
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private bool m_first = true;
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private Stream m_currentStream;
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internal ConstructedOctetStream(Asn1StreamParser parser)
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{
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m_parser = parser;
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}
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public override int Read(byte[] buffer, int offset, int count)
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{
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Streams.ValidateBufferArguments(buffer, offset, count);
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#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER || _UNITY_2021_2_OR_NEWER_
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return Read(buffer.AsSpan(offset, count));
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#else
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if (count < 1)
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return 0;
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if (m_currentStream == null)
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{
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if (!m_first)
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return 0;
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Asn1OctetStringParser next = GetNextParser();
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if (next == null)
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return 0;
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m_first = false;
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m_currentStream = next.GetOctetStream();
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}
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int totalRead = 0;
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for (;;)
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{
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int numRead = m_currentStream.Read(buffer, offset + totalRead, count - totalRead);
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if (numRead > 0)
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{
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totalRead += numRead;
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if (totalRead == count)
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return totalRead;
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}
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else
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{
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Asn1OctetStringParser next = GetNextParser();
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if (next == null)
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{
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m_currentStream = null;
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return totalRead;
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}
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m_currentStream = next.GetOctetStream();
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}
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}
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#endif
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}
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#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER || _UNITY_2021_2_OR_NEWER_
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public override int Read(Span<byte> buffer)
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{
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if (buffer.IsEmpty)
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return 0;
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if (m_currentStream == null)
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{
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if (!m_first)
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return 0;
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Asn1OctetStringParser next = GetNextParser();
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if (next == null)
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return 0;
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m_first = false;
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m_currentStream = next.GetOctetStream();
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}
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int totalRead = 0;
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for (;;)
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{
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int numRead = m_currentStream.Read(buffer[totalRead..]);
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if (numRead > 0)
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{
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totalRead += numRead;
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if (totalRead == buffer.Length)
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return totalRead;
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}
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else
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{
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Asn1OctetStringParser next = GetNextParser();
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if (next == null)
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{
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m_currentStream = null;
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return totalRead;
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}
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m_currentStream = next.GetOctetStream();
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}
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}
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}
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#endif
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public override int ReadByte()
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{
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if (m_currentStream == null)
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{
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if (!m_first)
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return -1;
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Asn1OctetStringParser next = GetNextParser();
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if (next == null)
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return -1;
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m_first = false;
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m_currentStream = next.GetOctetStream();
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}
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for (;;)
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{
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int b = m_currentStream.ReadByte();
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if (b >= 0)
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return b;
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Asn1OctetStringParser next = GetNextParser();
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if (next == null)
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{
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m_currentStream = null;
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return -1;
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}
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m_currentStream = next.GetOctetStream();
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}
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}
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private Asn1OctetStringParser GetNextParser()
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{
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IAsn1Convertible asn1Obj = m_parser.ReadObject();
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if (asn1Obj == null)
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return null;
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if (asn1Obj is Asn1OctetStringParser)
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return (Asn1OctetStringParser)asn1Obj;
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throw new IOException("unknown object encountered: " + Org.BouncyCastle.Utilities.Platform.GetTypeName(asn1Obj));
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}
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}
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}
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#pragma warning restore
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#endif
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