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19e84fea62
upx/src/compress/compress_lzma.cpp
Markus F.X.J. Oberhumer 19e84fea62 all: yet more minor updates
2023-06-09 14:12:05 +02:00

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/* compress_lzma.cpp --
This file is part of the UPX executable compressor.
Copyright (C) 1996-2023 Markus Franz Xaver Johannes Oberhumer
All Rights Reserved.
UPX and the UCL library are free software; you can redistribute them
and/or modify them under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2 of
the License, or (at your option) any later version.
This program 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 this program; see the file COPYING.
If not, write to the Free Software Foundation, Inc.,
59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
Markus F.X.J. Oberhumer
<markus@oberhumer.com>
*/
#include "../conf.h"
#include "compress.h"
#include "../util/membuffer.h"
#if (ACC_CC_CLANG)
#pragma clang diagnostic ignored "-Wshadow"
#endif
#if (ACC_CC_GNUC >= 0x040200)
#pragma GCC diagnostic ignored "-Wshadow"
#endif
#if (ACC_CC_MSC)
#pragma warning(disable : 4456) // -Wno-shadow
#endif
#if (ACC_CC_MSC && (_MSC_VER < 1900))
#pragma warning(disable : 4127) // warning C4127: conditional expression is constant
#endif
void lzma_compress_config_t::reset() noexcept {
pos_bits.reset();
lit_pos_bits.reset();
lit_context_bits.reset();
dict_size.reset();
fast_mode = 2;
num_fast_bytes.reset();
match_finder_cycles = 0;
max_num_probs = 0;
}
// INFO: the LZMA SDK is covered by a permissive license which allows
// using unmodified LZMA source code in UPX and the UPX stubs.
// See SPECIAL EXCEPTION below.
//
// Quoting from lzma-4.43/lzma.txt:
//
// LICENSE
// -------
//
// LZMA SDK is available under any of the following licenses:
//
// 1) GNU Lesser General Public License (GNU LGPL)
// 2) Common Public License (CPL)
// 3) Simplified license for unmodified code (read SPECIAL EXCEPTION)
// 4) Proprietary license
//
// It means that you can select one of these four options and follow rules
// of that license.
//
// 1,2) GNU LGPL and CPL licenses are pretty similar and both these
// licenses are classified as
// - "Free software licenses" at http://www.gnu.org/
// - "OSI-approved" at http://www.opensource.org/
//
// 3) SPECIAL EXCEPTION
//
// Igor Pavlov, as the author of this code, expressly permits you
// to statically or dynamically link your code (or bind by name)
// to the files from LZMA SDK without subjecting your linked
// code to the terms of the CPL or GNU LGPL.
// Any modifications or additions to files from LZMA SDK, however,
// are subject to the GNU LGPL or CPL terms.
//
// SPECIAL EXCEPTION allows you to use LZMA SDK in applications with closed code,
// while you keep LZMA SDK code unmodified.
/*************************************************************************
// compress defaults
**************************************************************************/
static bool prepare_result(lzma_compress_result_t *res, unsigned src_len, int method, int level,
const lzma_compress_config_t *lcconf) {
// setup defaults
res->pos_bits = 2; // 0 .. 4
res->lit_pos_bits = 0; // 0 .. 4
res->lit_context_bits = 3; // 0 .. 8
res->dict_size = 4 * 1024 * 1024; // 1 .. 2**30
res->fast_mode = 2; // 0 .. 2
res->num_fast_bytes = 64; // 5 .. 273
res->match_finder_cycles = 0;
// UPX overrides
res->pos_bits = lzma_compress_config_t::pos_bits_t::default_value;
res->lit_pos_bits = lzma_compress_config_t::lit_pos_bits_t::default_value;
res->lit_context_bits = lzma_compress_config_t::lit_context_bits_t::default_value;
res->dict_size = lzma_compress_config_t::dict_size_t::default_value;
res->num_fast_bytes = lzma_compress_config_t::num_fast_bytes_t::default_value;
// method overrides
if (method >= 0x100) {
res->pos_bits = (method >> 16) & 15;
res->lit_pos_bits = (method >> 12) & 15;
res->lit_context_bits = (method >> 8) & 15;
}
#if 0
// DEBUG - set sizes so that we use a maximum amount of stack.
// These settings cause res->num_probs == 3147574, i.e. we will
// need about 6 MiB of stack during runtime decompression.
res->lit_pos_bits = 4;
res->lit_context_bits = 8;
#endif
// TODO: tune these settings according to level
switch (level) {
case 1:
res->dict_size = 256 * 1024;
res->fast_mode = 0;
res->num_fast_bytes = 8;
break;
case 2:
res->dict_size = 256 * 1024;
res->fast_mode = 0;
break;
case 3:
break;
case 4:
break;
case 5:
break;
case 6:
break;
case 7:
break;
case 8:
break;
case 9:
res->dict_size = 8 * 1024 * 1024;
break;
case 10:
res->dict_size = src_len;
break;
default:
goto error;
}
// cconf overrides
if (lcconf) {
oassign(res->pos_bits, lcconf->pos_bits);
oassign(res->lit_pos_bits, lcconf->lit_pos_bits);
oassign(res->lit_context_bits, lcconf->lit_context_bits);
oassign(res->dict_size, lcconf->dict_size);
oassign(res->num_fast_bytes, lcconf->num_fast_bytes);
}
// limit dictionary size
if (res->dict_size > src_len)
res->dict_size = src_len;
// limit num_probs
if (lcconf && lcconf->max_num_probs) {
for (;;) {
unsigned n = 1846 + (768u << (res->lit_context_bits + res->lit_pos_bits));
if (n <= lcconf->max_num_probs)
break;
if (res->lit_pos_bits > res->lit_context_bits) {
if (res->lit_pos_bits == 0)
goto error;
res->lit_pos_bits -= 1;
} else {
if (res->lit_context_bits == 0)
goto error;
res->lit_context_bits -= 1;
}
}
}
lzma_compress_config_t::pos_bits_t::assertValue(res->pos_bits);
lzma_compress_config_t::lit_pos_bits_t::assertValue(res->lit_pos_bits);
lzma_compress_config_t::lit_context_bits_t::assertValue(res->lit_context_bits);
lzma_compress_config_t::dict_size_t::assertValue(res->dict_size);
lzma_compress_config_t::num_fast_bytes_t::assertValue(res->num_fast_bytes);
res->num_probs = 1846 + (768u << (res->lit_context_bits + res->lit_pos_bits));
NO_printf("\nlzma_compress config: %u %u %u %u %u\n", res->pos_bits, res->lit_pos_bits,
res->lit_context_bits, res->dict_size, res->num_probs);
return true;
error:
return false;
}
/*************************************************************************
// compress - cruft because of pseudo-COM layer
**************************************************************************/
// ensure proper nullptr usage
#include <cstddef>
#undef NULL
#define NULL nullptr
#if defined(__GNUC__)
#undef __null
#define __null nullptr
#endif
#undef MSDOS
#undef OS2
#undef _WIN32
#undef _WIN32_WCE
#undef COMPRESS_MF_MT
#undef _NO_EXCEPTIONS
#include <lzma-sdk/C/Common/MyInitGuid.h>
// #include <lzma-sdk/C/7zip/Compress/LZMA/LZMADecoder.h>
#include <lzma-sdk/C/7zip/Compress/LZMA/LZMAEncoder.h>
namespace MyLzma {
struct InStream final : public ISequentialInStream, public CMyUnknownImp {
virtual ~InStream() {}
MY_UNKNOWN_IMP
const Byte *b_buf = nullptr;
size_t b_size;
size_t b_pos;
void Init(const Byte *data, size_t size) {
b_buf = data;
b_size = size;
b_pos = 0;
}
STDMETHOD(Read)(void *data, UInt32 size, UInt32 *processedSize) override;
};
STDMETHODIMP InStream::Read(void *data, UInt32 size, UInt32 *processedSize) {
size_t remain = b_size - b_pos;
if (size > remain)
size = (UInt32) remain;
memmove(data, b_buf + b_pos, size);
b_pos += size;
if (processedSize != nullptr)
*processedSize = size;
return S_OK;
}
struct OutStream final : public ISequentialOutStream, public CMyUnknownImp {
virtual ~OutStream() {}
MY_UNKNOWN_IMP
Byte *b_buf = nullptr;
size_t b_size;
size_t b_pos;
bool overflow;
void Init(Byte *data, size_t size) {
b_buf = data;
b_size = size;
b_pos = 0;
overflow = false;
}
HRESULT WriteByte(Byte c) {
if (b_pos >= b_size) {
overflow = true;
return E_FAIL;
}
b_buf[b_pos++] = c;
return S_OK;
}
STDMETHOD(Write)(const void *data, UInt32 size, UInt32 *processedSize) override;
};
STDMETHODIMP OutStream::Write(const void *data, UInt32 size, UInt32 *processedSize) {
size_t remain = b_size - b_pos;
if (size > remain)
size = (UInt32) remain, overflow = true;
memmove(b_buf + b_pos, data, size);
b_pos += size;
if (processedSize != nullptr)
*processedSize = size;
return overflow ? E_FAIL : S_OK;
}
struct ProgressInfo final : public ICompressProgressInfo, public CMyUnknownImp {
virtual ~ProgressInfo() {}
MY_UNKNOWN_IMP
STDMETHOD(SetRatioInfo)(const UInt64 *inSize, const UInt64 *outSize) override;
upx_callback_p cb = nullptr;
};
STDMETHODIMP ProgressInfo::SetRatioInfo(const UInt64 *inSize, const UInt64 *outSize) {
if (cb && cb->nprogress)
cb->nprogress(cb, (unsigned) *inSize, (unsigned) *outSize);
return S_OK;
}
} // namespace MyLzma
#include <lzma-sdk/C/Common/Alloc.cpp>
#include <lzma-sdk/C/Common/CRC.cpp>
// #include <lzma-sdk/C/7zip/Common/InBuffer.cpp>
#include <lzma-sdk/C/7zip/Common/OutBuffer.cpp>
#include <lzma-sdk/C/7zip/Common/StreamUtils.cpp>
#include <lzma-sdk/C/7zip/Compress/LZ/LZInWindow.cpp>
// #include <lzma-sdk/C/7zip/Compress/LZ/LZOutWindow.cpp>
// #include <lzma-sdk/C/7zip/Compress/LZMA/LZMADecoder.cpp>
#include <lzma-sdk/C/7zip/Compress/LZMA/LZMAEncoder.cpp>
#include <lzma-sdk/C/7zip/Compress/RangeCoder/RangeCoderBit.cpp>
#undef RC_NORMALIZE
int upx_lzma_compress(const upx_bytep src, unsigned src_len, upx_bytep dst, unsigned *dst_len,
upx_callback_p cb, int method, int level,
const upx_compress_config_t *cconf_parm, upx_compress_result_t *cresult) {
assert(M_IS_LZMA(method));
assert(level > 0);
assert(cresult != nullptr);
int r = UPX_E_ERROR;
HRESULT rh;
const lzma_compress_config_t *const lcconf = cconf_parm ? &cconf_parm->conf_lzma : nullptr;
lzma_compress_result_t *const res = &cresult->result_lzma;
MyLzma::InStream is;
is.AddRef();
is.Init(src, src_len);
MyLzma::OutStream os;
os.AddRef();
os.Init(dst, *dst_len);
MyLzma::ProgressInfo progress;
progress.AddRef();
progress.cb = cb; // progress.Init()
NCompress::NLZMA::CEncoder enc;
const PROPID propIDs[8] = {
NCoderPropID::kPosStateBits, // 0 pb _posStateBits(2)
NCoderPropID::kLitPosBits, // 1 lp _numLiteralPosStateBits(0)
NCoderPropID::kLitContextBits, // 2 lc _numLiteralContextBits(3)
NCoderPropID::kDictionarySize, // 3 ds
NCoderPropID::kAlgorithm, // 4 fm _fastmode
NCoderPropID::kNumFastBytes, // 5 fb
NCoderPropID::kMatchFinderCycles, // 6 mfc _matchFinderCycles, _cutValue
NCoderPropID::kMatchFinder // 7 mf
};
PROPVARIANT pr[8];
const unsigned nprops = 8;
if (!prepare_result(res, src_len, method, level, lcconf))
goto error;
pr[0].vt = pr[1].vt = pr[2].vt = pr[3].vt = pr[4].vt = pr[5].vt = pr[6].vt = VT_UI4;
pr[7].vt = VT_BSTR;
pr[0].uintVal = res->pos_bits;
pr[1].uintVal = res->lit_pos_bits;
pr[2].uintVal = res->lit_context_bits;
pr[3].uintVal = res->dict_size;
pr[4].uintVal = res->fast_mode;
pr[5].uintVal = res->num_fast_bytes;
pr[6].uintVal = res->match_finder_cycles;
static const wchar_t matchfinder[] = L"BT4";
assert(NCompress::NLZMA::FindMatchFinder(matchfinder) >= 0);
pr[7].bstrVal = ACC_PCAST(BSTR, ACC_UNCONST_CAST(wchar_t *, matchfinder));
try {
if (enc.SetCoderProperties(propIDs, pr, nprops) != S_OK)
goto error;
// encode properties in LZMA-style (5 bytes)
if (enc.WriteCoderProperties(&os) != S_OK)
goto error;
if (os.overflow) {
// r = UPX_E_OUTPUT_OVERRUN;
r = UPX_E_NOT_COMPRESSIBLE;
goto error;
}
assert(os.b_pos == 5);
// reset and encode properties in UPX-style (2 bytes)
os.b_pos = 0;
// UPX extra stuff in first byte: 5 high bits convenience for stub decompressor
unsigned t = res->lit_context_bits + res->lit_pos_bits;
os.WriteByte(Byte((t << 3) | res->pos_bits));
os.WriteByte(Byte((res->lit_pos_bits << 4) | res->lit_context_bits));
// compress
rh = enc.Code(&is, &os, nullptr, nullptr, &progress);
} catch (...) {
rh = E_OUTOFMEMORY;
}
assert(is.b_pos <= src_len);
assert(os.b_pos <= *dst_len);
if (rh == E_OUTOFMEMORY)
r = UPX_E_OUT_OF_MEMORY;
else if (os.overflow) {
assert(os.b_pos == *dst_len);
// r = UPX_E_OUTPUT_OVERRUN;
r = UPX_E_NOT_COMPRESSIBLE;
} else if (rh == S_OK) {
assert(is.b_pos == src_len);
r = UPX_E_OK;
}
error:
*dst_len = (unsigned) os.b_pos;
NO_printf("\nlzma_compress: %d: %u %u %u %u %u, %u - > %u\n", r, res->pos_bits,
res->lit_pos_bits, res->lit_context_bits, res->dict_size, res->num_probs, src_len,
*dst_len);
NO_printf("%u %u %u\n", is.__m_RefCount, os.__m_RefCount, progress.__m_RefCount);
return r;
}
/*************************************************************************
// decompress
**************************************************************************/
#undef _LZMA_IN_CB
#undef _LZMA_OUT_READ
#undef _LZMA_PROB32
#undef _LZMA_LOC_OPT
#include <lzma-sdk/C/7zip/Compress/LZMA_C/LzmaDecode.h>
#include <lzma-sdk/C/7zip/Compress/LZMA_C/LzmaDecode.c>
int upx_lzma_decompress(const upx_bytep src, unsigned src_len, upx_bytep dst, unsigned *dst_len,
int method, const upx_compress_result_t *cresult) {
assert(M_IS_LZMA(method));
// see res->num_probs above
COMPILE_TIME_ASSERT(sizeof(CProb) == 2)
COMPILE_TIME_ASSERT(LZMA_BASE_SIZE == 1846)
COMPILE_TIME_ASSERT(LZMA_LIT_SIZE == 768)
CLzmaDecoderState s;
memset(&s, 0, sizeof(s));
SizeT src_out = 0, dst_out = 0;
int r = UPX_E_ERROR;
int rh;
// decode UPX-style properties (2 bytes)
if (src_len < 3) {
r = UPX_E_INPUT_OVERRUN;
goto error;
}
s.Properties.pb = src[0] & 7;
s.Properties.lp = (src[1] >> 4);
s.Properties.lc = src[1] & 15;
if (s.Properties.pb >= 5)
goto error;
if (s.Properties.lp >= 5)
goto error;
if (s.Properties.lc >= 9)
goto error;
// UPX extra stuff in first byte: 5 high bits convenience for stub decompressor
if ((src[0] >> 3) != s.Properties.lc + s.Properties.lp)
goto error;
src += 2;
src_len -= 2;
if (cresult) {
assert(cresult->debug.method == method);
assert(cresult->result_lzma.pos_bits == (unsigned) s.Properties.pb);
assert(cresult->result_lzma.lit_pos_bits == (unsigned) s.Properties.lp);
assert(cresult->result_lzma.lit_context_bits == (unsigned) s.Properties.lc);
assert(cresult->result_lzma.num_probs == (unsigned) LzmaGetNumProbs(&s.Properties));
const lzma_compress_result_t *res = &cresult->result_lzma;
NO_printf("\nlzma_decompress config: %u %u %u %u %u\n", res->pos_bits, res->lit_pos_bits,
res->lit_context_bits, res->dict_size, res->num_probs);
UNUSED(res);
}
s.Probs = (CProb *) malloc(sizeof(CProb) * LzmaGetNumProbs(&s.Properties));
if (!s.Probs) {
r = UPX_E_OUT_OF_MEMORY;
goto error;
}
rh = LzmaDecode(&s, src, src_len, &src_out, dst, *dst_len, &dst_out);
assert(src_out <= src_len);
assert(dst_out <= *dst_len);
if (rh == 0) {
r = UPX_E_OK;
if (src_out != src_len)
r = UPX_E_INPUT_NOT_CONSUMED;
} else if (rh == LZMA_RESULT_INPUT_OVERRUN)
r = UPX_E_INPUT_OVERRUN;
else if (rh == LZMA_RESULT_OUTPUT_OVERRUN)
r = UPX_E_OUTPUT_OVERRUN;
error:
*dst_len = dst_out;
free(s.Probs);
return r;
}
/*************************************************************************
// test_overlap - see <ucl/ucl.h> for semantics
**************************************************************************/
int upx_lzma_test_overlap(const upx_bytep buf, const upx_bytep tbuf, unsigned src_off,
unsigned src_len, unsigned *dst_len, int method,
const upx_compress_result_t *cresult) {
assert(M_IS_LZMA(method));
MemBuffer b(src_off + src_len);
memcpy(b + src_off, buf + src_off, src_len);
unsigned saved_dst_len = *dst_len;
int r = upx_lzma_decompress(raw_index_bytes(b, src_off, src_len), src_len,
raw_bytes(b, *dst_len), dst_len, method, cresult);
if (r != UPX_E_OK)
return r;
if (*dst_len != saved_dst_len)
return UPX_E_ERROR;
// NOTE: there is a very tiny possibility that decompression has
// succeeded but the data is not restored correctly because of
// in-place buffer overlapping, so we use an extra memcmp().
if (tbuf != nullptr && memcmp(tbuf, b, *dst_len) != 0)
return UPX_E_ERROR;
return UPX_E_OK;
}
/*************************************************************************
// misc
**************************************************************************/
int upx_lzma_init(void) { return 0; }
const char *upx_lzma_version_string(void) { return "4.43"; }
/*************************************************************************
// doctest checks
**************************************************************************/
TEST_CASE("upx_lzma_decompress") {
const byte *c_data;
byte d_buf[16];
unsigned d_len;
int r;
c_data = (const byte *) "\x1a\x03\x00\x7f\xed\x3c\x00\x00\x00";
d_len = 16;
r = upx_lzma_decompress(c_data, 9, d_buf, &d_len, M_LZMA, nullptr);
CHECK((r == 0 && d_len == 16));
r = upx_lzma_decompress(c_data, 8, d_buf, &d_len, M_LZMA, nullptr);
CHECK(r == UPX_E_INPUT_OVERRUN);
d_len = 15;
r = upx_lzma_decompress(c_data, 9, d_buf, &d_len, M_LZMA, nullptr);
CHECK(r == UPX_E_OUTPUT_OVERRUN);
}
/* vim:set ts=4 sw=4 et: */
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