| static private CopyStreamChunk ( Stream stream, Stream dest_stream, Array buffer, int length ) : void | ||
| stream | Stream | |
| dest_stream | Stream | |
| buffer | Array | |
| length | int | |
| return | void | |
private static byte[] HashStream(Stream stream, ImageWriter writer, out int strong_name_pointer)
{
Section section = writer.text;
int headerSize = (int)writer.GetHeaderSize();
int pointerToRawData = (int)section.PointerToRawData;
DataDirectory strongNameSignatureDirectory = writer.GetStrongNameSignatureDirectory();
if (strongNameSignatureDirectory.Size == 0)
{
throw new InvalidOperationException();
}
strong_name_pointer = (int)((long)pointerToRawData + (ulong)(strongNameSignatureDirectory.VirtualAddress - section.VirtualAddress));
int size = (int)strongNameSignatureDirectory.Size;
SHA1Managed sHA1Managed = new SHA1Managed();
byte[] numArray = new byte[8192];
using (CryptoStream cryptoStream = new CryptoStream(Stream.Null, sHA1Managed, CryptoStreamMode.Write))
{
stream.Seek((long)0, SeekOrigin.Begin);
CryptoService.CopyStreamChunk(stream, cryptoStream, numArray, headerSize);
stream.Seek((long)pointerToRawData, SeekOrigin.Begin);
CryptoService.CopyStreamChunk(stream, cryptoStream, numArray, strong_name_pointer - pointerToRawData);
stream.Seek((long)size, SeekOrigin.Current);
CryptoService.CopyStreamChunk(stream, cryptoStream, numArray, (int)(stream.Length - (long)(strong_name_pointer + size)));
}
return(sHA1Managed.Hash);
}
public static byte[] ComputeHash(string file)
{
if (!File.Exists(file))
{
return(Empty <byte> .Array);
}
SHA1Managed sHA1Managed = new SHA1Managed();
using (FileStream fileStream = new FileStream(file, FileMode.Open, FileAccess.Read, FileShare.Read))
{
byte[] numArray = new byte[8192];
using (CryptoStream cryptoStream = new CryptoStream(Stream.Null, sHA1Managed, CryptoStreamMode.Write))
{
CryptoService.CopyStreamChunk(fileStream, cryptoStream, numArray, (int)fileStream.Length);
}
}
return(sHA1Managed.Hash);
}
