private void CopyBytes(ZipUpdate update, Stream destination, Stream source, long bytesToCopy, bool updateCrc)
{
int num3;
if (destination == source)
{
throw new InvalidOperationException("Destination and source are the same");
}
Crc32 crc = new Crc32();
byte[] buffer = GetBuffer();
long num = bytesToCopy;
long num2 = 0L;
do
{
int length = buffer.Length;
if (bytesToCopy < length)
{
length = (int)bytesToCopy;
}
num3 = source.Read(buffer, 0, length);
if (num3 > 0)
{
if (updateCrc)
{
crc.Update(buffer, 0, num3);
}
destination.Write(buffer, 0, num3);
bytesToCopy -= num3;
num2 += num3;
}
}
while ((num3 > 0) && (bytesToCopy > 0L));
if (num2 != num)
{
throw new ZipException(string.Format("Failed to copy bytes expected {0} read {1}", num, num2));
}
if (updateCrc)
{
update.OutEntry.Crc = crc.Value;
}
}
private void CopyEntryDataDirect(ZipUpdate update, Stream stream, bool updateCrc, ref long destinationPosition, ref long sourcePosition)
{
int num4;
long compressedSize = update.Entry.CompressedSize;
Crc32 crc = new Crc32();
byte[] buffer = GetBuffer();
long num2 = compressedSize;
long num3 = 0L;
do
{
int length = buffer.Length;
if (compressedSize < length)
{
length = (int)compressedSize;
}
stream.Position = sourcePosition;
num4 = stream.Read(buffer, 0, length);
if (num4 > 0)
{
if (updateCrc)
{
crc.Update(buffer, 0, num4);
}
stream.Position = destinationPosition;
stream.Write(buffer, 0, num4);
destinationPosition += num4;
sourcePosition += num4;
compressedSize -= num4;
num3 += num4;
}
}
while ((num4 > 0) && (compressedSize > 0L));
if (num3 != num2)
{
throw new ZipException(string.Format("Failed to copy bytes expected {0} read {1}", num2, num3));
}
if (updateCrc)
{
update.OutEntry.Crc = crc.Value;
}
}
public bool TestArchive(bool testData,
TestStrategy strategy = TestStrategy.FindFirstError,
ZipTestResultHandler resultHandler = null)
{
if (isDisposed_)
{
throw new ObjectDisposedException("ZipFile");
}
TestStatus status = new TestStatus(this);
if (resultHandler != null)
{
resultHandler(status, null);
}
HeaderTest tests = testData ? (HeaderTest.Header | HeaderTest.Extract) : HeaderTest.Header;
bool flag = true;
try
{
for (int i = 0; flag && (i < Count); i++)
{
if (resultHandler != null)
{
status.SetEntry(this[i]);
status.SetOperation(TestOperation.EntryHeader);
resultHandler(status, null);
}
try
{
TestLocalHeader(this[i], tests);
}
catch (ZipException exception)
{
status.AddError();
if (resultHandler != null)
{
resultHandler(status, string.Format("Exception during test - '{0}'", exception.Message));
}
if (strategy == TestStrategy.FindFirstError)
{
flag = false;
}
}
if ((flag && testData) && this[i].IsFile)
{
if (resultHandler != null)
{
status.SetOperation(TestOperation.EntryData);
resultHandler(status, null);
}
Crc32 crc = new Crc32();
using (Stream stream = GetInputStream(this[i]))
{
int num3;
byte[] buffer = new byte[DefaultBufferSize];
long num2 = 0L;
while ((num3 = stream.Read(buffer, 0, buffer.Length)) > 0)
{
crc.Update(buffer, 0, num3);
if (resultHandler != null)
{
num2 += num3;
status.SetBytesTested(num2);
resultHandler(status, null);
}
}
}
if (this[i].Crc != crc.Value)
{
status.AddError();
if (resultHandler != null)
{
resultHandler(status, "CRC mismatch");
}
if (strategy == TestStrategy.FindFirstError)
{
flag = false;
}
}
if ((this[i].Flags & 8) != 0)
{
ZipHelperStream stream2 = new ZipHelperStream(baseStream_);
DescriptorData data = new DescriptorData();
stream2.ReadDataDescriptor(this[i].LocalHeaderRequiresZip64, data);
if (this[i].Crc != data.Crc)
{
status.AddError();
}
if (this[i].CompressedSize != data.CompressedSize)
{
status.AddError();
}
if (this[i].Size != data.Size)
{
status.AddError();
}
}
}
if (resultHandler != null)
{
status.SetOperation(TestOperation.EntryComplete);
resultHandler(status, null);
}
}
if (resultHandler != null)
{
status.SetOperation(TestOperation.MiscellaneousTests);
resultHandler(status, null);
}
}
catch (Exception exception2)
{
status.AddError();
if (resultHandler != null)
{
resultHandler(status, string.Format("Exception during test - '{0}'", exception2.Message));
}
}
if (resultHandler != null)
{
status.SetOperation(TestOperation.Complete);
status.SetEntry(null);
resultHandler(status, null);
}
return (status.ErrorCount == 0);
}
private bool ReadHeader()
{
crc = new Crc32();
if (inputBuffer.Available <= 0)
{
inputBuffer.Fill();
if (inputBuffer.Available <= 0)
{
return false;
}
}
Crc32 crc32 = new Crc32();
int num = inputBuffer.ReadLeByte();
if (num < 0)
{
throw new EndOfStreamException("EOS reading GZIP header");
}
crc32.Update(num);
if (num != 0x1f)
{
throw new GZipException("Error GZIP header, first magic byte doesn't match");
}
num = inputBuffer.ReadLeByte();
if (num < 0)
{
throw new EndOfStreamException("EOS reading GZIP header");
}
if (num != 0x8b)
{
throw new GZipException("Error GZIP header, second magic byte doesn't match");
}
crc32.Update(num);
int num2 = inputBuffer.ReadLeByte();
if (num2 < 0)
{
throw new EndOfStreamException("EOS reading GZIP header");
}
if (num2 != 8)
{
throw new GZipException("Error GZIP header, data not in deflate format");
}
crc32.Update(num2);
int num3 = inputBuffer.ReadLeByte();
if (num3 < 0)
{
throw new EndOfStreamException("EOS reading GZIP header");
}
crc32.Update(num3);
if ((num3 & 0xe0) != 0)
{
throw new GZipException("Reserved flag bits in GZIP header != 0");
}
for (int i = 0; i < 6; i++)
{
int num5 = inputBuffer.ReadLeByte();
if (num5 < 0)
{
throw new EndOfStreamException("EOS reading GZIP header");
}
crc32.Update(num5);
}
if ((num3 & 4) != 0)
{
for (int j = 0; j < 2; j++)
{
int num7 = inputBuffer.ReadLeByte();
if (num7 < 0)
{
throw new EndOfStreamException("EOS reading GZIP header");
}
crc32.Update(num7);
}
if ((inputBuffer.ReadLeByte() < 0) || (inputBuffer.ReadLeByte() < 0))
{
throw new EndOfStreamException("EOS reading GZIP header");
}
int num8 = inputBuffer.ReadLeByte();
int num9 = inputBuffer.ReadLeByte();
if ((num8 < 0) || (num9 < 0))
{
throw new EndOfStreamException("EOS reading GZIP header");
}
crc32.Update(num8);
crc32.Update(num9);
int num10 = (num8 << 8) | num9;
for (int k = 0; k < num10; k++)
{
int num12 = inputBuffer.ReadLeByte();
if (num12 < 0)
{
throw new EndOfStreamException("EOS reading GZIP header");
}
crc32.Update(num12);
}
}
if ((num3 & 8) != 0)
{
int num13;
while ((num13 = inputBuffer.ReadLeByte()) > 0)
{
crc32.Update(num13);
}
if (num13 < 0)
{
throw new EndOfStreamException("EOS reading GZIP header");
}
crc32.Update(num13);
}
if ((num3 & GZipConstants.FCOMMENT) != 0)
{
int num14;
while ((num14 = inputBuffer.ReadLeByte()) > 0)
{
crc32.Update(num14);
}
if (num14 < 0)
{
throw new EndOfStreamException("EOS reading GZIP header");
}
crc32.Update(num14);
}
if ((num3 & 2) != 0)
{
int num16 = inputBuffer.ReadLeByte();
if (num16 < 0)
{
throw new EndOfStreamException("EOS reading GZIP header");
}
int num15 = inputBuffer.ReadLeByte();
if (num15 < 0)
{
throw new EndOfStreamException("EOS reading GZIP header");
}
num16 = (num16 << 8) | num15;
if (num16 != (((int)crc32.Value) & 0xffff))
{
throw new GZipException("Header CRC value mismatch");
}
}
readGZIPHeader = true;
return true;
}