static byte[] HashStream(Stream stream, ImageWriter writer, out int strong_name_pointer)
{
const int buffer_size = 8192;
var text = writer.text;
var header_size = (int)writer.GetHeaderSize();
var text_section_pointer = (int)text.PointerToRawData;
var strong_name_directory = writer.GetStrongNameSignatureDirectory();
if (strong_name_directory.Size == 0)
throw new InvalidOperationException();
strong_name_pointer = (int)(text_section_pointer
+ (strong_name_directory.VirtualAddress - text.VirtualAddress));
var strong_name_length = (int)strong_name_directory.Size;
var sha1 = new SHA1Managed();
var buffer = new byte[buffer_size];
using (var crypto_stream = new CryptoStream(Stream.Null, sha1, CryptoStreamMode.Write))
{
stream.Seek(0, SeekOrigin.Begin);
CopyStreamChunk(stream, crypto_stream, buffer, header_size);
stream.Seek(text_section_pointer, SeekOrigin.Begin);
CopyStreamChunk(stream, crypto_stream, buffer, (int)strong_name_pointer - text_section_pointer);
stream.Seek(strong_name_length, SeekOrigin.Current);
CopyStreamChunk(stream, crypto_stream, buffer, (int)(stream.Length - (strong_name_pointer + strong_name_length)));
}
return sha1.Hash;
}
public static void StrongName(Stream stream, ImageWriter writer, StrongNameKeyPair key_pair)
{
int strong_name_pointer;
var strong_name = CreateStrongName(key_pair, HashStream(stream, writer, out strong_name_pointer));
PatchStrongName(stream, strong_name_pointer, strong_name);
}
public static ImageWriter CreateWriter(ModuleDefinition module, MetadataBuilder metadata, Stream stream)
{
var writer = new ImageWriter(module, metadata, stream);
writer.BuildSections();
return writer;
}