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PEWriter.cpp
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PEWriter.cpp
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/* Software License Agreement
*
* Copyright(C) 1994-2023 David Lindauer, (LADSoft)
*
* This file is part of the Orange C Compiler package.
*
* The Orange C Compiler package is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* The Orange C Compiler package is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Orange C. If not, see <http://www.gnu.org/licenses/>.
*
* contact information:
* email: TouchStone222@runbox.com <David Lindauer>
*
*/
#include "DotNetPELib.h"
#include "PEFile.h"
#include "MZHeader.h"
#include "PEHeader.h"
#include <ctime>
#include <cstdio>
namespace DotNetPELib
{
// this is a CUSTOM version string for microsoft.
// standard CIL differs
#define RTV_STRING "v4.0.30319"
Byte PEWriter::MZHeader_[] = {
0x4d, 0x5a, 0x90, 0x00, 0x03, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00, 0xFF, 0xFF, 0x00, 0x00, 0xb8, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x80, 0x00, 0x00, 0x00, 0x0e, 0x1f, 0xba, 0x0e, 0x00, 0xb4, 0x09, 0xcd, 0x21, 0xb8, 0x01, 0x4c,
0xcd, 0x21, 0x54, 0x68, 0x69, 0x73, 0x20, 0x70, 0x72, 0x6f, 0x67, 0x72, 0x61, 0x6d, 0x20, 0x63, 0x61, 0x6e, 0x6e,
0x6f, 0x74, 0x20, 0x62, 0x65, 0x20, 0x72, 0x75, 0x6e, 0x20, 0x69, 0x6e, 0x20, 0x44, 0x4f, 0x53, 0x20, 0x6d, 0x6f,
0x64, 0x65, 0x2e, 0x0d, 0x0d, 0x0a, 0x24, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
};
const char* PEWriter::streamNames_[5] = {"#~", "#Strings", "#US", "#GUID", "#Blob"};
static DotNetMetaHeader metaHeader1 = {META_SIG, 1, 1, 0};
DotNetMetaHeader* PEWriter::metaHeader_ = &metaHeader1;
DWord PEWriter::cildata_rva_;
Byte PEWriter::defaultUS_[8] = {0, 3, 0x20, 0, 0};
size_t PEMethod::Write(size_t sizes[MaxTables + ExtraIndexes], std::iostream& out) const
{
Byte dest[512];
int n;
if ((flags_ & 3) == TinyFormat)
{
n = 1;
*(Byte*)dest = (flags_ & 3) + (codeSize_ << 2);
}
else
{
n = 12;
*(Word*)dest = 0x3000 + (flags_ & 0xfff) + (sehData_.size() ? (int)MoreSects : 0);
*(Word*)(dest + 2) = maxStack_;
*(DWord*)(dest + 4) = codeSize_;
*(DWord*)(dest + 8) = signatureToken_;
}
out.write((char*)dest, n);
out.write((char*)code_, codeSize_);
n += codeSize_;
if (sehData_.size())
{
if (n % 4)
{
char align[4];
memset(align, 0, sizeof(align));
out.write((char*)align, 4 - n % 4);
n = n + 3;
n = n & ~3;
}
int end = 0;
while (end < sehData_.size())
{
const CodeContainer::SEHData& edata = sehData_[end];
bool etiny =
edata.tryOffset < 65536 && edata.tryLength < 256 && edata.handlerOffset < 65536 && edata.handlerLength < 256;
if (!etiny)
break;
end++;
}
if (end >= sehData_.size() && sehData_.size() < 21)
{
Byte header[4];
header[0] = EHTable;
header[1] = sehData_.size() * 12 + 4;
header[2] = 0;
header[3] = 0;
out.write((char*)header, 4);
n += 4;
for (int i = 0; i < sehData_.size(); i++)
{
const CodeContainer::SEHData& data = sehData_[i];
Byte bytes[12];
bytes[0] = data.flags;
bytes[1] = 0;
bytes[2] = data.tryOffset & 0xff;
bytes[3] = (data.tryOffset >> 8) & 0xff;
bytes[4] = data.tryLength;
bytes[5] = data.handlerOffset & 0xff;
bytes[6] = (data.handlerOffset >> 8) & 0xff;
bytes[7] = data.handlerLength;
if (data.flags & CodeContainer::SEHData::Filter)
{
bytes[8] = data.filterOffset & 0xff;
bytes[9] = (data.filterOffset >> 8) & 0xff;
bytes[10] = (data.filterOffset >> 16) & 0xff;
bytes[11] = (data.filterOffset >> 24) & 0xff;
}
else
{
bytes[8] = data.classToken & 0xff;
bytes[9] = (data.classToken >> 8) & 0xff;
bytes[10] = (data.classToken >> 16) & 0xff;
bytes[11] = (data.classToken >> 24) & 0xff;
}
out.write((char*)bytes, 12);
n += 12;
}
}
else
{
Byte header[4];
header[0] = EHTable | EHFatFormat;
int q = sehData_.size() * 24 + 4;
header[1] = q & 0xff;
header[2] = (q >> 8) & 0xff;
header[3] = (q >> 16) & 0xff;
out.write((char*)header, 4);
n += 4;
for (int i = 0; i < sehData_.size(); i++)
{
const CodeContainer::SEHData& data = sehData_[i];
Byte bytes[24];
bytes[0] = data.flags;
bytes[1] = 0;
bytes[2] = 0;
bytes[3] = 0;
bytes[4] = data.tryOffset & 0xff;
bytes[5] = (data.tryOffset >> 8) & 0xff;
bytes[6] = (data.tryOffset >> 16) & 0xff;
bytes[7] = (data.tryOffset >> 24) & 0xff;
bytes[8] = data.tryLength & 0xff;
bytes[9] = (data.tryLength >> 8) & 0xff;
bytes[10] = (data.tryLength >> 16) & 0xff;
bytes[11] = (data.tryLength >> 24) & 0xff;
bytes[12] = data.handlerOffset & 0xff;
bytes[13] = (data.handlerOffset >> 8) & 0xff;
bytes[14] = (data.handlerOffset >> 16) & 0xff;
bytes[15] = (data.handlerOffset >> 24) & 0xff;
bytes[16] = data.handlerLength & 0xff;
bytes[17] = (data.handlerLength >> 8) & 0xff;
bytes[18] = (data.handlerLength >> 16) & 0xff;
bytes[19] = (data.handlerLength >> 24) & 0xff;
if (data.flags & CodeContainer::SEHData::Filter)
{
bytes[20] = data.filterOffset & 0xff;
bytes[21] = (data.filterOffset >> 8) & 0xff;
bytes[22] = (data.filterOffset >> 16) & 0xff;
bytes[23] = (data.filterOffset >> 24) & 0xff;
}
else
{
bytes[20] = data.classToken & 0xff;
bytes[21] = (data.classToken >> 8) & 0xff;
bytes[22] = (data.classToken >> 16) & 0xff;
bytes[23] = (data.classToken >> 24) & 0xff;
}
out.write((char*)bytes, 24);
n += 24;
}
}
}
return n;
}
void PEWriter::pool::Ensure(size_t newSize)
{
if (size + newSize > maxSize)
{
if (size + newSize < maxSize * 2)
maxSize = maxSize * 2;
else
maxSize = (maxSize + newSize) * 2;
base = (Byte*)realloc(base, maxSize);
}
}
PEWriter::~PEWriter()
{
delete peHeader_;
delete peObjects_;
delete cor20Header_;
delete tablesHeader_;
for (int i = 0; i < MaxTables; i++)
{
for (auto it = tables_[i].begin(); it != tables_[i].end(); it++)
{
TableEntryBase* x = *it;
delete x;
}
}
for (auto it = methods_.begin(); it != methods_.end(); ++it)
{
PEMethod* method = *it;
delete method;
}
}
size_t PEWriter::AddTableEntry(TableEntryBase* entry)
{
int n = entry->TableIndex();
tables_[n].push_back(entry);
return tables_[n].size();
}
void PEWriter::AddMethod(PEMethod* method)
{
if (method->flags_ & PEMethod::EntryPoint)
{
if (entryPoint_)
throw new PELibError(PELibError::MultipleEntryPoints);
entryPoint_ = method->methodDef_ | (tMethodDef << 24);
}
methods_.push_back(method);
}
size_t PEWriter::HashString(const std::string& utf8)
{
auto it = stringMap_.find(utf8);
if (it != stringMap_.end())
return it->second;
if (strings_.size == 0)
strings_.size++;
strings_.Ensure(utf8.size() + 1);
size_t rv = strings_.size;
memcpy(strings_.base + strings_.size, utf8.c_str(), utf8.size() + 1);
strings_.size += utf8.size() + 1;
stringMap_[utf8] = rv;
return rv;
}
size_t PEWriter::HashUS(std::wstring str)
{
if (us_.size == 0)
us_.size++;
int flag = 0;
us_.Ensure(str.size() * 2 + 5);
size_t rv = us_.size;
int blobLen = str.size() * 2 + 1;
if (blobLen < 0x80)
{
us_.base[us_.size++] = blobLen;
}
else if (blobLen <= 0x3fff)
{
us_.base[us_.size++] = (blobLen >> 8) | 0x80;
us_.base[us_.size++] = blobLen;
}
else
{
blobLen &= 0x1fffffff;
us_.base[us_.size++] = (blobLen >> 24) | 0xc0;
us_.base[us_.size++] = (blobLen >> 16);
us_.base[us_.size++] = (blobLen >> 8);
us_.base[us_.size++] = (blobLen >> 0);
}
for (int i = 0; i < str.size(); i++)
{
int n = str[i];
if (n & 0xff00)
flag = 1;
else if (n <= 8 || (n >= 0x0e && n < 0x20) || n == 0x27 || n == 0x2d || n == 0x7f)
flag = 1;
us_.base[us_.size++] = n & 0xff;
us_.base[us_.size++] = n >> 8;
}
us_.base[us_.size++] = flag;
return rv;
}
size_t PEWriter::HashGUID(Byte* Guid)
{
guid_.Ensure(128 / 8);
size_t rv = guid_.size;
memcpy(guid_.base + rv, Guid, 128 / 8);
guid_.size += 128 / 8;
return (rv / (128 / 8) + 1);
}
size_t PEWriter::HashBlob(Byte* blobData, size_t blobLen)
{
if (blob_.size == 0)
blob_.size++;
int xcount = 0;
blob_.Ensure(blobLen + 4);
size_t rv = blob_.size;
if (blobLen < 0x80)
{
blob_.base[blob_.size++] = blobLen;
}
else if (blobLen <= 0x3fff)
{
blob_.base[blob_.size++] = (blobLen >> 8) | 0x80;
blob_.base[blob_.size++] = blobLen;
}
else
{
blobLen &= 0x1fffffff;
blob_.base[blob_.size++] = (blobLen >> 24) | 0xc0;
blob_.base[blob_.size++] = (blobLen >> 16);
blob_.base[blob_.size++] = (blobLen >> 8);
blob_.base[blob_.size++] = (blobLen >> 0);
}
memcpy(blob_.base + blob_.size, blobData, blobLen);
blob_.size += blobLen;
return rv;
}
size_t PEWriter::RVABytes(Byte* Bytes, size_t dataLen)
{
int pos = rva_.size;
rva_.Ensure(dataLen + pos - rva_.size);
size_t rv = rva_.size;
rva_.size += pos - rva_.size + dataLen;
memcpy(rva_.base + rv, Bytes, dataLen);
return rv;
}
void PEWriter::CalculateObjects(PELib& peLib)
{
peHeader_ = new PEHeader;
memset(peHeader_, 0, sizeof(PEHeader));
peHeader_->signature = PESIG;
peHeader_->cpu_type = PE_INTEL386;
peHeader_->magic = PE_MAGICNUM;
peHeader_->nt_hdr_size = PE_NT_HEADER_SIZE; // optional header sie
peHeader_->flags = PE_FILE_EXECUTABLE + (DLL_ ? PE_FILE_LIBRARY : 0);
peHeader_->linker_major_version = 6;
peHeader_->object_align = objectAlign_;
peHeader_->file_align = fileAlign_;
peHeader_->image_base = imageBase_;
peHeader_->os_major_version = 4;
peHeader_->subsys_major_version = 4;
peHeader_->subsystem = GUI_ ? PE_SUBSYS_WINDOWS : PE_SUBSYS_CONSOLE;
peHeader_->dll_flags = 0x8540; // magic!
peHeader_->stack_size = 0x100000;
peHeader_->stack_commit = 0x1000;
peHeader_->heap_size = 0x100000;
peHeader_->heap_commit = 0x1000;
peHeader_->num_rvas = 16;
peHeader_->num_objects = 2;
peHeader_->header_size = sizeof(MZHeader_) + sizeof(PEHeader) + peHeader_->num_objects * sizeof(PEObject);
if (peHeader_->header_size % fileAlign_)
{
peHeader_->header_size += (fileAlign_ - peHeader_->header_size % fileAlign_);
}
peHeader_->time = time(0);
peObjects_ = new PEObject[MAX_PE_OBJECTS];
memset(peObjects_, 0, sizeof(PEObject) * MAX_PE_OBJECTS);
int n = 0;
strncpy(peObjects_[n].name, ".text", 8);
peObjects_[n++].flags = WINF_EXECUTE | WINF_CODE | WINF_READABLE;
/*
strncpy(peObjects_[n].name, ".rsrc", 8);
peObjects_[n++].flags = WINF_INITDATA | WINF_READABLE;
*/
strncpy(peObjects_[n].name, ".reloc", 8);
peObjects_[n++].flags = WINF_INITDATA | WINF_READABLE | WINF_DISCARDABLE;
size_t currentRVA = sizeof(MZHeader_) + sizeof(PEHeader) + peHeader_->num_objects * sizeof(PEObject);
if (currentRVA % objectAlign_)
{
currentRVA += objectAlign_ - (currentRVA % objectAlign_);
}
peObjects_[0].virtual_addr = currentRVA;
peObjects_[0].raw_ptr = peHeader_->header_size;
peHeader_->code_base = currentRVA;
peHeader_->iat_rva = currentRVA;
peHeader_->iat_size = 8;
currentRVA += peHeader_->iat_size;
peHeader_->com_rva = currentRVA;
peHeader_->com_size = sizeof(DotNetCOR20Header);
currentRVA += peHeader_->com_size;
cor20Header_ = new DotNetCOR20Header;
memset(cor20Header_, 0, sizeof(DotNetCOR20Header));
cor20Header_->cb = sizeof(DotNetCOR20Header);
cor20Header_->MajorRuntimeVersion = 2;
cor20Header_->MinorRuntimeVersion = 5;
// standard CIL expects ONLY bit 0, we are using bit 1 as well
// for interoperability with the microsoft runtimes
cor20Header_->Flags = peLib.GetCorFlags();
cor20Header_->EntryPointToken = entryPoint_;
if (snkFile_.size())
{
snkLen_ = rsaEncoder.LoadStrongNameKeys(snkFile_.c_str());
if (snkLen_)
{
Byte buf[16384];
size_t len = 0;
rsaEncoder.GetPublicKeyData(buf, &len);
((AssemblyDefTableEntry*)tables_[tAssemblyDef][0])->publicKeyIndex_ = HashBlob(buf, len);
((AssemblyDefTableEntry*)tables_[tAssemblyDef][0])->flags_ |= PublicKey;
cor20Header_->Flags |= 8; // strong name signed
}
if (!snkLen_)
{
std::cout << "Warning: key file not found or invalid. Assembly will not be signed" << std::endl;
}
}
cildata_rva_ = currentRVA;
if (rva_.size)
{
currentRVA += rva_.size;
if (currentRVA % 8)
currentRVA += 8 - (currentRVA % 8);
}
size_t lastRVA = currentRVA;
for (auto method : methods_)
{
if (method->flags_ & PEMethod::CIL)
{
if ((method->flags_ & 3) == PEMethod::TinyFormat)
{
method->rva_ = currentRVA;
lastRVA = currentRVA;
currentRVA += 1;
}
else
{
if (currentRVA % 4)
currentRVA += 4 - currentRVA % 4;
method->rva_ = currentRVA;
lastRVA = currentRVA;
currentRVA += 12;
}
currentRVA += method->codeSize_;
if (method->sehData_.size())
{
if (currentRVA % 4)
currentRVA += 4 - currentRVA % 4;
int end = 0;
const CodeContainer::SEHData& data = method->sehData_[end];
while (end < method->sehData_.size())
{
const CodeContainer::SEHData& edata = method->sehData_[end];
bool etiny = edata.tryOffset < 65536 && edata.tryLength < 256 && edata.handlerOffset < 65536 &&
edata.handlerLength < 256;
if (!etiny)
break;
end++;
}
if (end >= method->sehData_.size() && method->sehData_.size() < 21)
{
currentRVA += 4 + method->sehData_.size() * 12;
}
else
{
currentRVA += 4 + method->sehData_.size() * 24;
}
}
}
else
{
method->rva_ = 0;
}
}
if (currentRVA % 4)
{
currentRVA += 4 - currentRVA % 4;
}
cor20Header_->MetaData[0] = currentRVA; // metadata root
currentRVA += 12; // metadataHeader;
currentRVA += 4; // version size;
currentRVA += sizeof(RTV_STRING);
if (currentRVA % 4)
currentRVA += 4 - currentRVA % 4;
currentRVA += 2; // flags
currentRVA += 2; // # streams, will be 5 in our implementation
for (int i = 0; i < 5; i++)
{
currentRVA += 8 + strlen(streamNames_[i]) + 1;
if (currentRVA % 4)
currentRVA += 4 - currentRVA % 4;
}
streamHeaders_[0][0] = currentRVA - cor20Header_->MetaData[0];
tablesHeader_ = new DotNetMetaTablesHeader;
memset(tablesHeader_, 0, sizeof(DotNetMetaTablesHeader));
tablesHeader_->MajorVersion = 2;
tablesHeader_->Reserved2 = 1;
tablesHeader_->MaskSorted = (((longlong)0x1600) << 32) + (0x3325FA00);
if (strings_.size >= 65536)
tablesHeader_->HeapOffsetSizes |= 1;
if (guid_.size >= 65536)
tablesHeader_->HeapOffsetSizes |= 2;
if (blob_.size >= 65536)
tablesHeader_->HeapOffsetSizes |= 4;
n = 0;
size_t counts[MaxTables + ExtraIndexes];
memset(counts, 0, sizeof(counts));
counts[tString] = strings_.size;
counts[tUS] = us_.size;
counts[tGUID] = guid_.size;
counts[tBlob] = blob_.size;
for (int i = 0; i < MaxTables; i++)
if (tables_[i].size())
{
counts[i] = tables_[i].size();
tablesHeader_->MaskValid |= ((longlong)1) << i;
n++;
}
currentRVA += sizeof(DotNetMetaTablesHeader); // tables header
currentRVA += n * sizeof(DWord); // table counts;
for (int i = 0; i < MaxTables; i++)
if (counts[i])
{
Byte buffer[512];
n = tables_[i][0]->Render(counts, buffer);
n *= counts[i];
currentRVA += n;
}
if (currentRVA % 4)
currentRVA += 4 - currentRVA % 4;
// currentRVA += 4;
streamHeaders_[0][1] = currentRVA - streamHeaders_[0][0] - cor20Header_->MetaData[0];
streamHeaders_[1][0] = currentRVA - cor20Header_->MetaData[0];
currentRVA += strings_.size;
if (currentRVA % 4)
currentRVA += 4 - currentRVA % 4;
streamHeaders_[1][1] = currentRVA - streamHeaders_[1][0] - cor20Header_->MetaData[0];
streamHeaders_[2][0] = currentRVA - cor20Header_->MetaData[0];
if (us_.size == 0)
currentRVA += sizeof(defaultUS_); // US May be empty in our implementation we put an empty string there
else
currentRVA += us_.size;
if (currentRVA % 4)
currentRVA += 4 - currentRVA % 4;
streamHeaders_[2][1] = currentRVA - streamHeaders_[2][0] - cor20Header_->MetaData[0];
streamHeaders_[3][0] = currentRVA - cor20Header_->MetaData[0];
currentRVA += guid_.size;
if (currentRVA % 4)
currentRVA += 4 - currentRVA % 4;
streamHeaders_[3][1] = currentRVA - streamHeaders_[3][0] - cor20Header_->MetaData[0];
streamHeaders_[4][0] = currentRVA - cor20Header_->MetaData[0];
currentRVA += blob_.size;
if (currentRVA % 4)
currentRVA += 4 - currentRVA % 4;
streamHeaders_[4][1] = currentRVA - streamHeaders_[4][0] - cor20Header_->MetaData[0];
cor20Header_->MetaData[1] = currentRVA - cor20Header_->MetaData[0];
peHeader_->import_rva = currentRVA;
currentRVA += sizeof(PEImportDir) * 2 + 8;
if (currentRVA % 16)
currentRVA += 16 - currentRVA % 16;
currentRVA += 2 + sizeof("_CorXXXMain") + sizeof("mscoree.dll") + 1;
peHeader_->import_size = currentRVA - peHeader_->import_rva;
if (currentRVA % 4)
currentRVA += 4 - currentRVA % 4;
currentRVA += 2;
peHeader_->entry_point = currentRVA;
currentRVA += 6;
if (snkLen_)
{
cor20Header_->StrongNameSignature[0] = currentRVA;
cor20Header_->StrongNameSignature[1] = snkLen_;
currentRVA += snkLen_;
}
int sect = 0;
peObjects_[sect].virtual_size = currentRVA - peObjects_[sect].virtual_addr;
n = peObjects_[sect].virtual_size;
if (n % fileAlign_)
n += fileAlign_ - n % fileAlign_;
peObjects_[sect].raw_size = n;
peHeader_->code_size = n;
if (currentRVA % objectAlign_)
currentRVA += objectAlign_ - currentRVA % objectAlign_;
peObjects_[sect + 1].raw_ptr = peObjects_[sect].raw_ptr + peObjects_[sect].raw_size;
peObjects_[sect + 1].virtual_addr = currentRVA;
peHeader_->data_base = currentRVA;
sect++;
#if 0
peHeader_->resource_rva = currentRVA;
currentRVA += (sizeof(PEResourceDirTable) + sizeof(PEResourceDirEntry)) * 3; /* resource dirs */
currentRVA += sizeof(PEResourceDataEntry);
currentRVA += 2; /* size of version info */
currentRVA += 48; /* fixed info */
currentRVA += 68; /* VarFileInfo */
currentRVA += 368 - 72; /* String file info base */
std::string nn = peLib.FileName();
n = nn.find_last_of("\\");
if (n != std::string::npos)
n = nn.size() - n;
else
n = nn.size();
if (n % 4)
n += 4 - (n % 4);
currentRVA += n * 2;
char temp[256];
sprintf(temp, "%d.%d.%d.%d", fileVersion[0], fileVersion[1], fileVersion[2], fileVersion[3]);
n = strlen(temp);
if (n % 4)
n += 4 - (n % 4);
n *= 2;
currentRVA += n;
sprintf(temp, "%d.%d.%d.%d", productVersion[0], productVersion[1], productVersion[2], productVersion[3]);
n = strlen(temp);
if (n % 4)
n += 4 - (n % 4);
n *= 2;
currentRVA += n;
sprintf(temp, "%d.%d.%d.%d", assemblyVersion[0], assemblyVersion[1], assemblyVersion[2], assemblyVersion[3]);
n = strlen(temp);
if (n % 4)
n += 4 - (n % 4);
n *= 2;
currentRVA += n;
peObjects_[sect].virtual_size = currentRVA - peObjects_[sect].virtual_addr;
peHeader_->resource_size = peObjects_[sect].virtual_size;
n = peObjects_[sect].virtual_size;
if (n % fileAlign);
n += fileAlign - n % fileAlign;
peObjects_[sect].raw_size = n;
peHeader_->data_size += n;
if (currentRVA %objectAlign)
currentRVA += objectAlign - currentRVA % objectAlign;
peObjects_[sect + 1].raw_ptr = peObjects_[sect].raw_ptr + peObjects_[sect].raw_size;
peObjects_[sect + 1].virtual_addr = currentRVA;
sect++;
#endif
peHeader_->fixup_rva = currentRVA;
currentRVA += 12; // sizeof relocs
peObjects_[sect].virtual_size = currentRVA - peObjects_[sect].virtual_addr;
peHeader_->fixup_size = peObjects_[sect].virtual_size;
n = peObjects_[sect].virtual_size;
if (n % fileAlign_)
n += fileAlign_ - n % fileAlign_;
peObjects_[sect].raw_size = n;
peHeader_->data_size += n;
if (currentRVA % objectAlign_)
currentRVA += objectAlign_ - currentRVA % objectAlign_;
peObjects_[sect + 1].raw_ptr = peObjects_[sect].raw_ptr + peObjects_[sect].raw_size;
peObjects_[sect + 1].virtual_addr = currentRVA;
peHeader_->image_size = currentRVA;
}
void PEWriter::HashPartOfFile(SHA1Context& context, size_t offset, size_t len)
{
outputFile_->seekg(offset);
char buf[8192];
int sz = 0x0;
while (sz < len)
{
int l = len - sz > 8192 ? 8192 : len - sz;
outputFile_->read(buf, l);
SHA1Input(&context, (Byte*)buf, l);
sz += l;
}
}
bool PEWriter::WriteFile(PELib& peLib, std::iostream& out)
{
outputFile_ = &out;
if (!entryPoint_ && !DLL_)
throw new PELibError(PELibError::MissingEntryPoint);
CalculateObjects(peLib);
bool rv = WriteMZData(peLib) && WritePEHeader(peLib) && WritePEObjects(peLib) && WriteIAT(peLib) && WriteCoreHeader(peLib) &&
WriteStaticData(peLib) && WriteMethods(peLib) && WriteMetadataHeaders(peLib) && WriteTables(peLib) &&
WriteStrings(peLib) && WriteUS(peLib) && WriteGUID(peLib) && WriteBlob(peLib) && WriteImports(peLib) &&
WriteEntryPoint(peLib) && WriteHashData(peLib) &&
// WriteVersionInfo(peLib) &&
WriteRelocs(peLib);
if (rv && snkLen_)
{
SHA1Context context;
SHA1Reset(&context);
int pos = 0;
HashPartOfFile(context, 0, 0x80);
// if there was something between here and the PE header we would hash it now
// well we are supposed to zero the pe header checksum and the
// authenticode signature pointer, but, since we don't set them nonzero anyway
// this is fine.
HashPartOfFile(context, 0x80, 0xf8);
HashPartOfFile(context, 0x80 + 0xf8, sizeof(PEObject) * peHeader_->num_objects);
// yes we do NOT hash the gap between the objects table and the first section
for (int i = 0; i < peHeader_->num_objects; i++)
{
if (peObjects_[i].virtual_addr < cor20Header_->StrongNameSignature[0] &&
cor20Header_->StrongNameSignature[0] < peObjects_[i].virtual_addr + peObjects_[i].virtual_size)
{
int offs = cor20Header_->StrongNameSignature[0] - peObjects_[i].virtual_addr;
int sz = cor20Header_->StrongNameSignature[1];
HashPartOfFile(context, peObjects_[i].raw_ptr, offs);
HashPartOfFile(context, peObjects_[i].raw_ptr + offs + sz, peObjects_[i].raw_size - offs - sz);
}
else
{
HashPartOfFile(context, peObjects_[i].raw_ptr, peObjects_[i].raw_size);
}
}
SHA1Result(&context);
Byte sigHash[16384];
memset(sigHash, 0xfe, 128);
size_t sigLen = 0;
rsaEncoder.GetStrongNameSignature(sigHash, &sigLen, (Byte*)context.Message_Digest, 20);
outputFile_->seekp(snkBase_);
outputFile_->write((char*)sigHash, sigLen);
}
return rv;
}
void PEWriter::align(size_t algn) const
{
size_t n = offset();
if (n % algn)
{
// assumes the alignments are 65536 or less
Byte buf[65536];
n = algn - n % algn;
memset(buf, 0, n);
put(buf, n);
}
}
bool PEWriter::WriteMZData(PELib& peLib) const
{
put(MZHeader_, sizeof(MZHeader_));
return true;
}
bool PEWriter::WritePEHeader(PELib& peLib)
{
peBase_ = outputFile_->tellp();
put(peHeader_, sizeof(PEHeader));
return true;
}
bool PEWriter::WritePEObjects(PELib& peLib) const
{
put(peObjects_, sizeof(PEObject) * peHeader_->num_objects);
return true;
}
bool PEWriter::WriteIAT(PELib& peLib) const
{
align(fileAlign_);
DWord n = peHeader_->import_rva;
n += sizeof(PEImportDir) * 2 + 4;
if (n % 16)
n += 16 - n % 16;
put(&n, sizeof(n));
n = 0;
put(&n, sizeof(n));
return true;
}
bool PEWriter::WriteCoreHeader(PELib& peLib)
{
corBase_ = outputFile_->tellp();
put(cor20Header_, sizeof(DotNetCOR20Header));
return true;
}
bool PEWriter::WriteHashData(PELib& peLib)
{
snkBase_ = outputFile_->tellp();
if (snkLen_)
{
Byte buf[2048];
memset(buf, 0, snkLen_);
put(buf, snkLen_);
}
return true;
}
bool PEWriter::WriteMethods(PELib& peLib) const
{
size_t counts[MaxTables + ExtraIndexes];
memset(counts, 0, sizeof(counts));
counts[tString] = strings_.size;
counts[tUS] = us_.size;
counts[tGUID] = guid_.size;
counts[tBlob] = blob_.size;
for (int i = 0; i < MaxTables; i++)
{
counts[i] = tables_[i].size();
}
for (std::list<PEMethod*>::const_iterator it = methods_.begin(); it != methods_.end(); ++it)
{
if ((*it)->flags_ & PEMethod::CIL)
{
if (((*it)->flags_ & 3) == PEMethod::FatFormat)
{
align(4);
}
(*it)->Write(counts, *outputFile_);
}
}
return true;
}
bool PEWriter::WriteMetadataHeaders(PELib& peLib) const
{
align(4);
put(metaHeader_, sizeof(DotNetMetaHeader));
int n = sizeof(RTV_STRING);
if (n % 4)
n += 4 - n % 4;
put(&n, sizeof(n));
put(RTV_STRING, sizeof(RTV_STRING));
align(4);
Word flags = 0;
put(&flags, sizeof(flags));
Word streams = 5;
put(&streams, sizeof(streams));
for (int i = 0; i < 5; i++)
{
put(&streamHeaders_[i][0], 4);
put(&streamHeaders_[i][1], 4);
put(streamNames_[i], strlen(streamNames_[i]) + 1);
align(4);
}
return true;
}
bool PEWriter::WriteTables(PELib& peLib) const
{
size_t counts[MaxTables + ExtraIndexes];
memset(counts, 0, sizeof(counts));
counts[tString] = strings_.size;
counts[tUS] = us_.size;
counts[tGUID] = guid_.size;
counts[tBlob] = blob_.size;
put(tablesHeader_, sizeof(DotNetMetaTablesHeader));
for (int i = 0; i < MaxTables; i++)
{
DWord n = counts[i] = tables_[i].size();
if (n)
{
put(&n, sizeof(n));
}
}
for (int i = 0; i < MaxTables; i++)
{
DWord n = tables_[i].size();
for (int j = 0; j < n; j++)
{
Byte buffer[512];
DWord sz = tables_[i][j]->Render(counts, buffer);
put(buffer, sz);
}
}
align(4);
// DWord n = 0;
// put(&n, sizeof(n));
return true;
}
bool PEWriter::WriteStrings(PELib& peLib) const
{
put(strings_.base, strings_.size);
align(4);
return true;
}
bool PEWriter::WriteUS(PELib& peLib) const
{
if (us_.size == 0)
{
put(defaultUS_, sizeof(defaultUS_));
}
else
{
put(us_.base, us_.size);
}
align(4);
return true;
}
bool PEWriter::WriteGUID(PELib& peLib) const
{
put(guid_.base, guid_.size);
align(4);
return true;
}
bool PEWriter::WriteBlob(PELib& peLib) const
{
put(blob_.base, blob_.size);
align(4);
return true;
}
bool PEWriter::WriteImports(PELib& peLib) const
{
PEImportDir dir[2];
memset(&dir, 0, sizeof(dir));
dir[0].thunkPos2 = peHeader_->import_rva + 2 * sizeof(PEImportDir);
DWord n = dir[0].thunkPos2 + 8;
if (n % 16)
n += 16 - n % 16;
DWord mainName = n;
n += 2;
n += sizeof("_CorXXXMain");
dir[0].dllName = n;
dir[0].thunkPos = peHeader_->iat_rva;
put(&dir, sizeof(dir));
put(&mainName, sizeof(mainName));
n = 0;
put(&n, sizeof(n)); // thunk
align(16);
put(&n, 2); // ord
if (DLL_)
put("_CorDllMain", sizeof("_CorDllMain"));
else
put("_CorExeMain", sizeof("_CorExeMain"));
put("mscoree.dll", sizeof("mscoree.dll"));
align(4);
return true;
}
bool PEWriter::WriteEntryPoint(PELib& peLib) const
{
DWord n = 0;
put(&n, 2);
n = 0x25ff; // JMP[xxx];
put(&n, 2);
n = peObjects_[0].virtual_addr + peHeader_->image_base;
put(&n, 4);
return true;
}
bool PEWriter::WriteStaticData(PELib& peLib) const
{
if (rva_.size)
{
put(rva_.base, rva_.size);
align(8);
}
return true;
}
void PEWriter::VersionString(const wchar_t* name, const char* value) const
{
Word n1 = wcslen(name) * 2 + strlen(value) * 2 + 6 + 2 + 2;
DWord n = wcslen(name) + 2;
if (n % 4)
n1 += n - n % 4;
n = (strlen(value) + 1) * 2;
if (n % 4)
n1 += n - n % 4;
put(&n1, sizeof(n1)); // length
n1 = (strlen(value) + 1) * 2; // value length
put(&n1, sizeof(n1)); // length
wchar_t buf[512];
for (int i = 0; i < n1 / 2; i++)
buf[i] = value[i];
n1 = 1; // type: string
put(&n1, sizeof(n1)); // length
put(name, wcslen(name) + 2);
align(4);
put(buf, n1 * 2);
align(4);
}
bool PEWriter::WriteVersionInfo(PELib& peLib) const
{
align(fileAlign_);
PEResourceDirTable resTable;
PEResourceDirEntry dir;
memset(&resTable, 0, sizeof(resTable));
resTable.ident_entry = 1;
dir.rva_or_id = 16; // version info
dir.escape = 1; // points to a subdir
dir.subdir_or_data = sizeof(resTable) + sizeof(dir);
put(&resTable, sizeof(resTable));
put(&dir, sizeof(dir));
dir.rva_or_id = 1; // index
dir.subdir_or_data += sizeof(resTable) + sizeof(dir);
put(&resTable, sizeof(resTable));
put(&dir, sizeof(dir));
dir.rva_or_id = 0;
dir.escape = 0; // points to a data table