105 lines
2.4 KiB
C#
105 lines
2.4 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.IO;
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namespace BestHTTP.SecureProtocol.Org.BouncyCastle.Asn1
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{
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class DefiniteLengthInputStream
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: LimitedInputStream
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{
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private static readonly byte[] EmptyBytes = new byte[0];
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private readonly int _originalLength;
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private int _remaining;
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internal DefiniteLengthInputStream(
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Stream inStream,
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int length)
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: base(inStream, length)
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{
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if (length < 0)
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throw new ArgumentException("negative lengths not allowed", "length");
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this._originalLength = length;
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this._remaining = length;
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if (length == 0)
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{
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SetParentEofDetect(true);
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}
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}
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internal int Remaining
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{
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get { return _remaining; }
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}
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public override int ReadByte()
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{
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if (_remaining == 0)
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return -1;
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int b = _in.ReadByte();
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if (b < 0)
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throw new EndOfStreamException("DEF length " + _originalLength + " object truncated by " + _remaining);
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if (--_remaining == 0)
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{
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SetParentEofDetect(true);
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}
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return b;
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}
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public override int Read(
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byte[] buf,
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int off,
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int len)
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{
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if (_remaining == 0)
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return 0;
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int toRead = System.Math.Min(len, _remaining);
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int numRead = _in.Read(buf, off, toRead);
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if (numRead < 1)
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throw new EndOfStreamException("DEF length " + _originalLength + " object truncated by " + _remaining);
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if ((_remaining -= numRead) == 0)
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{
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SetParentEofDetect(true);
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}
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return numRead;
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}
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internal void ReadAllIntoByteArray(byte[] buf)
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{
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if (_remaining != buf.Length)
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throw new ArgumentException("buffer length not right for data");
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if ((_remaining -= Streams.ReadFully(_in, buf)) != 0)
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throw new EndOfStreamException("DEF length " + _originalLength + " object truncated by " + _remaining);
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SetParentEofDetect(true);
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}
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internal byte[] ToArray()
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{
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if (_remaining == 0)
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return EmptyBytes;
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byte[] bytes = new byte[_remaining];
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if ((_remaining -= Streams.ReadFully(_in, bytes)) != 0)
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throw new EndOfStreamException("DEF length " + _originalLength + " object truncated by " + _remaining);
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SetParentEofDetect(true);
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return bytes;
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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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