internal bool CheckIntegrity(out string message)
{
message = (string)null;
if (this.existedInArchive)
{
if (!ZipHelper.IsCompressionMethodSupported(this.CompressionMethod))
{
message = string.Format("Unsupported compression method: {0}.", (object)this.CompressionMethod);
return(false);
}
if ((int)this.DiskStartNumber != (int)this.Archive.NumberOfThisDisk)
{
message = "Splitted archive is not supported.";
return(false);
}
if (this.LocalHeaderOffset > this.Archive.Reader.BaseStream.Length)
{
message = "Local file header is corrupted.";
return(false);
}
this.Archive.Reader.BaseStream.Seek(this.LocalHeaderOffset, SeekOrigin.Begin);
this.localFileHeader = new LocalFileHeader();
if (!this.localFileHeader.TryReadBlock(this.Archive.Reader))
{
message = "Local file header is corrupted.";
return(false);
}
if (!this.ValidateLocalFileHeader())
{
message = "Local file header is corrupted.";
return(false);
}
if (this.CompressedDataOffset + this.CompressedLength > this.Archive.Reader.BaseStream.Length)
{
message = "Local file header is corrupted.";
return(false);
}
}
return(true);
}
