ziphandler.cpp

7-Zip 是一款号称有着现今最高压缩比的压缩软件

// ZipHandler.cpp

#include "StdAfx.h"

#include "ZipHandler.h"

#include "Common/Defs.h"
#include "Common/StringConvert.h"
#include "Common/ComTry.h"
#include "Common/IntToString.h"

#include "Windows/Time.h"
#include "Windows/PropVariant.h"

#include "../../IPassword.h"

#include "../../Common/ProgressUtils.h"
#include "../../Common/StreamObjects.h"
#include "../../Common/CreateCoder.h"
#include "../../Common/FilterCoder.h"

#include "../../Compress/Copy/CopyCoder.h"

#include "../Common/ItemNameUtils.h"
#include "../Common/OutStreamWithCRC.h"

#include "../../Compress/Shrink/ShrinkDecoder.h"
#include "../../Compress/Implode/ImplodeDecoder.h"


#include "../../Crypto/Zip/ZipCipher.h"
#include "../../Crypto/WzAES/WzAES.h"

#ifdef ZIP_STRONG_SUPORT
#include "../../Crypto/ZipStrong/ZipStrong.h"
#endif

using namespace NWindows;

namespace NArchive {
namespace NZip {

// static const CMethodId kMethodId_Store = 0;
static const CMethodId kMethodId_ZipBase = 0x040100;
static const CMethodId kMethodId_BZip2 = 0x040202;

const wchar_t *kHostOS[] =
{
  L"FAT",
  L"AMIGA",
  L"VMS",
  L"Unix",
  L"VM/CMS",
  L"Atari",
  L"HPFS",
  L"Macintosh",
  L"Z-System",
  L"CP/M",
  L"TOPS-20",
  L"NTFS",
  L"SMS/QDOS",
  L"Acorn",
  L"VFAT",
  L"MVS",
  L"BeOS",
  L"Tandem",
  L"OS/400",
  L"OS/X"
};


static const int kNumHostOSes = sizeof(kHostOS) / sizeof(kHostOS[0]);

static const wchar_t *kUnknownOS = L"Unknown";

STATPROPSTG kProps[] =
{
  { NULL, kpidPath, VT_BSTR},
  { NULL, kpidIsDir, VT_BOOL},
  { NULL, kpidSize, VT_UI8},
  { NULL, kpidPackSize, VT_UI8},
  { NULL, kpidMTime, VT_FILETIME},
  { NULL, kpidCTime, VT_FILETIME},
  { NULL, kpidATime, VT_FILETIME},
  
  { NULL, kpidAttrib, VT_UI4},

  { NULL, kpidEncrypted, VT_BOOL},
  { NULL, kpidComment, VT_BSTR},
    
  { NULL, kpidCRC, VT_UI4},

  { NULL, kpidMethod, VT_BSTR},
  { NULL, kpidHostOS, VT_BSTR}

  // { NULL, kpidUnpackVer, VT_UI1},
};

const wchar_t *kMethods[] =
{
  L"Store",
  L"Shrink",
  L"Reduced1",
  L"Reduced2",
  L"Reduced2",
  L"Reduced3",
  L"Implode",
  L"Tokenizing",
  L"Deflate",
  L"Deflate64",
  L"PKImploding",
  L"Unknown",
  L"BZip2"
};

const int kNumMethods = sizeof(kMethods) / sizeof(kMethods[0]);
// const wchar_t *kUnknownMethod = L"Unknown";
const wchar_t *kWavPackMethod = L"WavPack";
const wchar_t *kPPMdMethod = L"PPMd";
const wchar_t *kAESMethod = L"AES";
const wchar_t *kZipCryptoMethod = L"ZipCrypto";
const wchar_t *kStrongCryptoMethod = L"StrongCrypto";

struct CStrongCryptoPair
{
  UInt16 Id;
  const wchar_t *Name;
};

CStrongCryptoPair g_StrongCryptoPairs[] =
{
  { NStrongCryptoFlags::kDES, L"DES" },
  { NStrongCryptoFlags::kRC2old, L"RC2a" },
  { NStrongCryptoFlags::k3DES168, L"3DES-168" },
  { NStrongCryptoFlags::k3DES112, L"3DES-112" },
  { NStrongCryptoFlags::kAES128, L"pkAES-128" },
  { NStrongCryptoFlags::kAES192, L"pkAES-192" },
  { NStrongCryptoFlags::kAES256, L"pkAES-256" },
  { NStrongCryptoFlags::kRC2, L"RC2" },
  { NStrongCryptoFlags::kBlowfish, L"Blowfish" },
  { NStrongCryptoFlags::kTwofish, L"Twofish" },
  { NStrongCryptoFlags::kRC4, L"RC4" }
};

STATPROPSTG kArcProps[] =
{
  { NULL, kpidBit64, VT_BOOL},
  { NULL, kpidComment, VT_BSTR}
};

CHandler::CHandler()
{
  InitMethodProperties();
}

static AString BytesToString(const CByteBuffer &data)
{
  AString s;
  int size = (int)data.GetCapacity();
  if (size > 0)
  {
    char *p = s.GetBuffer(size + 1);
    memcpy(p, (const Byte *)data, size);
    p[size] = '\0';
    s.ReleaseBuffer();
  }
  return s;
}

IMP_IInArchive_Props
IMP_IInArchive_ArcProps

STDMETHODIMP CHandler::GetArchiveProperty(PROPID propID, PROPVARIANT *value)
{
  COM_TRY_BEGIN
  NWindows::NCOM::CPropVariant prop;
  switch(propID)
  {
    case kpidBit64:  if (m_Archive.IsZip64) prop = m_Archive.IsZip64; break;
    case kpidComment:
      prop = MultiByteToUnicodeString(BytesToString(m_Archive.m_ArchiveInfo.Comment), CP_ACP);
      break;
  }
  prop.Detach(value);
  COM_TRY_END
  return S_OK;
}

STDMETHODIMP CHandler::GetNumberOfItems(UInt32 *numItems)
{
  *numItems = m_Items.Size();
  return S_OK;
}

STDMETHODIMP CHandler::GetProperty(UInt32 index, PROPID propID, PROPVARIANT *value)
{
  COM_TRY_BEGIN
  NWindows::NCOM::CPropVariant prop;
  const CItemEx &item = m_Items[index];
  switch(propID)
  {
    case kpidPath:  prop = NItemName::GetOSName2(item.GetUnicodeString(item.Name)); break;
    case kpidIsDir:  prop = item.IsDir(); break;
    case kpidSize:  prop = item.UnPackSize; break;
    case kpidPackSize:  prop = item.PackSize; break;
    case kpidTimeType:
    {
      FILETIME utcFileTime;
      if (item.CentralExtra.GetNtfsTime(NFileHeader::NNtfsExtra::kTagTime, utcFileTime))
        prop = (UInt32)NFileTimeType::kWindows;
      break;
    }
    case kpidCTime:
    {
      FILETIME ft;
      if (item.CentralExtra.GetNtfsTime(NFileHeader::NNtfsExtra::kCTime, ft))
        prop = ft;
      break;
    }
    case kpidATime:
    {
      FILETIME ft;
      if (item.CentralExtra.GetNtfsTime(NFileHeader::NNtfsExtra::kATime, ft))
        prop = ft;
      break;
    }
    case kpidMTime:
    {
      FILETIME utcFileTime;
      if (!item.CentralExtra.GetNtfsTime(NFileHeader::NNtfsExtra::kMTime, utcFileTime))
      {
        FILETIME localFileTime;
        if (NTime::DosTimeToFileTime(item.Time, localFileTime))
        {
          if (!LocalFileTimeToFileTime(&localFileTime, &utcFileTime))
            utcFileTime.dwHighDateTime = utcFileTime.dwLowDateTime = 0;
        }
        else
          utcFileTime.dwHighDateTime = utcFileTime.dwLowDateTime = 0;
      }
      prop = utcFileTime;
      break;
    }
    case kpidAttrib:  prop = item.GetWinAttributes(); break;
    case kpidEncrypted:  prop = item.IsEncrypted(); break;
    case kpidComment:  prop = item.GetUnicodeString(BytesToString(item.Comment)); break;
    case kpidCRC:  if (item.IsThereCrc()) prop = item.FileCRC; break;
    case kpidMethod:
    {
      UInt16 methodId = item.CompressionMethod;
      UString method;
      if (item.IsEncrypted())
      {
        if (methodId == NFileHeader::NCompressionMethod::kWzAES)
        {
          method = kAESMethod;
          CWzAesExtraField aesField;
          if (item.CentralExtra.GetWzAesField(aesField))
          {
            method += L"-";
            wchar_t s[32];
            ConvertUInt64ToString((aesField.Strength + 1) * 64 , s);
            method += s;
            method += L" ";
            methodId = aesField.Method;
          }
        }
        else
        {
          if (item.IsStrongEncrypted())
          {
            CStrongCryptoField f;
            bool finded = false;
            if (item.CentralExtra.GetStrongCryptoField(f))
            {
              for (int i = 0; i < sizeof(g_StrongCryptoPairs) / sizeof(g_StrongCryptoPairs[0]); i++)
              {
                const CStrongCryptoPair &pair = g_StrongCryptoPairs[i];
                if (f.AlgId == pair.Id)
                {
                  method += pair.Name;
                  finded = true;
                  break;
                }
              }
            }
            if (!finded)
              method += kStrongCryptoMethod;
          }
          else
            method += kZipCryptoMethod;
          method += L" ";
        }
      }
      if (methodId < kNumMethods)
        method += kMethods[methodId];
      else if (methodId == NFileHeader::NCompressionMethod::kPPMd)
        method += kPPMdMethod;
      else if (methodId == NFileHeader::NCompressionMethod::kWavPack)
        method += kWavPackMethod;
      else
      {
        wchar_t s[32];
        ConvertUInt64ToString(methodId, s);
        method += s;
      }
      prop = method;
      break;
    }
    case kpidHostOS:
      prop = (item.MadeByVersion.HostOS < kNumHostOSes) ?
        (kHostOS[item.MadeByVersion.HostOS]) : kUnknownOS;
      break;
  }
  prop.Detach(value);
  return S_OK;
  COM_TRY_END
}

class CProgressImp: public CProgressVirt
{
  CMyComPtr<IArchiveOpenCallback> _callback;
public:
  STDMETHOD(SetTotal)(UInt64 numFiles);
  STDMETHOD(SetCompleted)(UInt64 numFiles);
  CProgressImp(IArchiveOpenCallback *callback): _callback(callback) {}
};

STDMETHODIMP CProgressImp::SetTotal(UInt64 numFiles)
{
  if (_callback)
    return _callback->SetTotal(&numFiles, NULL);
  return S_OK;
}

STDMETHODIMP CProgressImp::SetCompleted(UInt64 numFiles)
{
  if (_callback)
    return _callback->SetCompleted(&numFiles, NULL);
  return S_OK;
}

STDMETHODIMP CHandler::Open(IInStream *inStream,
    const UInt64 *maxCheckStartPosition, IArchiveOpenCallback *callback)
{
  COM_TRY_BEGIN
  try
  {
    Close();
    RINOK(inStream->Seek(0, STREAM_SEEK_SET, NULL));
    RINOK(m_Archive.Open(inStream, maxCheckStartPosition));
    CProgressImp progressImp(callback);
    return m_Archive.ReadHeaders(m_Items, &progressImp);
  }
  catch(const CInArchiveException &) { Close(); return S_FALSE; }
  catch(...) { Close(); throw; }
  COM_TRY_END
}

STDMETHODIMP CHandler::Close()
{
  m_Items.Clear();
  m_Archive.Close();
  return S_OK;
}

//////////////////////////////////////
// CHandler::DecompressItems

struct CMethodItem
{
  UInt16 ZipMethod;
  CMyComPtr<ICompressCoder> Coder;
};

class CZipDecoder
{
  NCrypto::NZip::CDecoder *_zipCryptoDecoderSpec;
  NCrypto::NWzAES::CDecoder *_aesDecoderSpec;
  CMyComPtr<ICompressFilter> _zipCryptoDecoder;
  CMyComPtr<ICompressFilter> _aesDecoder;
  #ifdef ZIP_STRONG_SUPORT
  NCrypto::NZipStrong::CDecoder *_zsDecoderSpec;
  CMyComPtr<ICompressFilter> _zsDecoder;
  #endif
  CFilterCoder *filterStreamSpec;
  CMyComPtr<ISequentialInStream> filterStream;
  CMyComPtr<ICryptoGetTextPassword> getTextPassword;
  CObjectVector<CMethodItem> methodItems;