/* 7zDec.c -- Decoding from 7z folder | |
2015-11-18 : Igor Pavlov : Public domain */ | |
#include "Precomp.h" | |
#include <string.h> | |
/* #define _7ZIP_PPMD_SUPPPORT */ | |
#include "7z.h" | |
#include "7zCrc.h" | |
#include "Bcj2.h" | |
#include "Bra.h" | |
#include "CpuArch.h" | |
#include "Delta.h" | |
#include "LzmaDec.h" | |
#include "Lzma2Dec.h" | |
#ifdef _7ZIP_PPMD_SUPPPORT | |
#include "Ppmd7.h" | |
#endif | |
#define k_Copy 0 | |
#define k_Delta 3 | |
#define k_LZMA2 0x21 | |
#define k_LZMA 0x30101 | |
#define k_BCJ 0x3030103 | |
#define k_BCJ2 0x303011B | |
#define k_PPC 0x3030205 | |
#define k_IA64 0x3030401 | |
#define k_ARM 0x3030501 | |
#define k_ARMT 0x3030701 | |
#define k_SPARC 0x3030805 | |
#ifdef _7ZIP_PPMD_SUPPPORT | |
#define k_PPMD 0x30401 | |
typedef struct | |
{ | |
IByteIn p; | |
const Byte *cur; | |
const Byte *end; | |
const Byte *begin; | |
UInt64 processed; | |
Bool extra; | |
SRes res; | |
ILookInStream *inStream; | |
} CByteInToLook; | |
static Byte ReadByte(void *pp) | |
{ | |
CByteInToLook *p = (CByteInToLook *)pp; | |
if (p->cur != p->end) | |
return *p->cur++; | |
if (p->res == SZ_OK) | |
{ | |
size_t size = p->cur - p->begin; | |
p->processed += size; | |
p->res = p->inStream->Skip(p->inStream, size); | |
size = (1 << 25); | |
p->res = p->inStream->Look(p->inStream, (const void **)&p->begin, &size); | |
p->cur = p->begin; | |
p->end = p->begin + size; | |
if (size != 0) | |
return *p->cur++;; | |
} | |
p->extra = True; | |
return 0; | |
} | |
static SRes SzDecodePpmd(const Byte *props, unsigned propsSize, UInt64 inSize, ILookInStream *inStream, | |
Byte *outBuffer, SizeT outSize, ISzAlloc *allocMain) | |
{ | |
CPpmd7 ppmd; | |
CByteInToLook s; | |
SRes res = SZ_OK; | |
s.p.Read = ReadByte; | |
s.inStream = inStream; | |
s.begin = s.end = s.cur = NULL; | |
s.extra = False; | |
s.res = SZ_OK; | |
s.processed = 0; | |
if (propsSize != 5) | |
return SZ_ERROR_UNSUPPORTED; | |
{ | |
unsigned order = props[0]; | |
UInt32 memSize = GetUi32(props + 1); | |
if (order < PPMD7_MIN_ORDER || | |
order > PPMD7_MAX_ORDER || | |
memSize < PPMD7_MIN_MEM_SIZE || | |
memSize > PPMD7_MAX_MEM_SIZE) | |
return SZ_ERROR_UNSUPPORTED; | |
Ppmd7_Construct(&ppmd); | |
if (!Ppmd7_Alloc(&ppmd, memSize, allocMain)) | |
return SZ_ERROR_MEM; | |
Ppmd7_Init(&ppmd, order); | |
} | |
{ | |
CPpmd7z_RangeDec rc; | |
Ppmd7z_RangeDec_CreateVTable(&rc); | |
rc.Stream = &s.p; | |
if (!Ppmd7z_RangeDec_Init(&rc)) | |
res = SZ_ERROR_DATA; | |
else if (s.extra) | |
res = (s.res != SZ_OK ? s.res : SZ_ERROR_DATA); | |
else | |
{ | |
SizeT i; | |
for (i = 0; i < outSize; i++) | |
{ | |
int sym = Ppmd7_DecodeSymbol(&ppmd, &rc.p); | |
if (s.extra || sym < 0) | |
break; | |
outBuffer[i] = (Byte)sym; | |
} | |
if (i != outSize) | |
res = (s.res != SZ_OK ? s.res : SZ_ERROR_DATA); | |
else if (s.processed + (s.cur - s.begin) != inSize || !Ppmd7z_RangeDec_IsFinishedOK(&rc)) | |
res = SZ_ERROR_DATA; | |
} | |
} | |
Ppmd7_Free(&ppmd, allocMain); | |
return res; | |
} | |
#endif | |
static SRes SzDecodeLzma(const Byte *props, unsigned propsSize, UInt64 inSize, ILookInStream *inStream, | |
Byte *outBuffer, SizeT outSize, ISzAlloc *allocMain) | |
{ | |
CLzmaDec state; | |
SRes res = SZ_OK; | |
LzmaDec_Construct(&state); | |
RINOK(LzmaDec_AllocateProbs(&state, props, propsSize, allocMain)); | |
state.dic = outBuffer; | |
state.dicBufSize = outSize; | |
LzmaDec_Init(&state); | |
for (;;) | |
{ | |
const void *inBuf = NULL; | |
size_t lookahead = (1 << 18); | |
if (lookahead > inSize) | |
lookahead = (size_t)inSize; | |
res = inStream->Look(inStream, &inBuf, &lookahead); | |
if (res != SZ_OK) | |
break; | |
{ | |
SizeT inProcessed = (SizeT)lookahead, dicPos = state.dicPos; | |
ELzmaStatus status; | |
res = LzmaDec_DecodeToDic(&state, outSize, inBuf, &inProcessed, LZMA_FINISH_END, &status); | |
lookahead -= inProcessed; | |
inSize -= inProcessed; | |
if (res != SZ_OK) | |
break; | |
if (status == LZMA_STATUS_FINISHED_WITH_MARK) | |
{ | |
if (outSize != state.dicPos || inSize != 0) | |
res = SZ_ERROR_DATA; | |
break; | |
} | |
if (outSize == state.dicPos && inSize == 0 && status == LZMA_STATUS_MAYBE_FINISHED_WITHOUT_MARK) | |
break; | |
if (inProcessed == 0 && dicPos == state.dicPos) | |
{ | |
res = SZ_ERROR_DATA; | |
break; | |
} | |
res = inStream->Skip((void *)inStream, inProcessed); | |
if (res != SZ_OK) | |
break; | |
} | |
} | |
LzmaDec_FreeProbs(&state, allocMain); | |
return res; | |
} | |
#ifndef _7Z_NO_METHOD_LZMA2 | |
static SRes SzDecodeLzma2(const Byte *props, unsigned propsSize, UInt64 inSize, ILookInStream *inStream, | |
Byte *outBuffer, SizeT outSize, ISzAlloc *allocMain) | |
{ | |
CLzma2Dec state; | |
SRes res = SZ_OK; | |
Lzma2Dec_Construct(&state); | |
if (propsSize != 1) | |
return SZ_ERROR_DATA; | |
RINOK(Lzma2Dec_AllocateProbs(&state, props[0], allocMain)); | |
state.decoder.dic = outBuffer; | |
state.decoder.dicBufSize = outSize; | |
Lzma2Dec_Init(&state); | |
for (;;) | |
{ | |
const void *inBuf = NULL; | |
size_t lookahead = (1 << 18); | |
if (lookahead > inSize) | |
lookahead = (size_t)inSize; | |
res = inStream->Look(inStream, &inBuf, &lookahead); | |
if (res != SZ_OK) | |
break; | |
{ | |
SizeT inProcessed = (SizeT)lookahead, dicPos = state.decoder.dicPos; | |
ELzmaStatus status; | |
res = Lzma2Dec_DecodeToDic(&state, outSize, inBuf, &inProcessed, LZMA_FINISH_END, &status); | |
lookahead -= inProcessed; | |
inSize -= inProcessed; | |
if (res != SZ_OK) | |
break; | |
if (status == LZMA_STATUS_FINISHED_WITH_MARK) | |
{ | |
if (outSize != state.decoder.dicPos || inSize != 0) | |
res = SZ_ERROR_DATA; | |
break; | |
} | |
if (inProcessed == 0 && dicPos == state.decoder.dicPos) | |
{ | |
res = SZ_ERROR_DATA; | |
break; | |
} | |
res = inStream->Skip((void *)inStream, inProcessed); | |
if (res != SZ_OK) | |
break; | |
} | |
} | |
Lzma2Dec_FreeProbs(&state, allocMain); | |
return res; | |
} | |
#endif | |
static SRes SzDecodeCopy(UInt64 inSize, ILookInStream *inStream, Byte *outBuffer) | |
{ | |
while (inSize > 0) | |
{ | |
const void *inBuf; | |
size_t curSize = (1 << 18); | |
if (curSize > inSize) | |
curSize = (size_t)inSize; | |
RINOK(inStream->Look(inStream, &inBuf, &curSize)); | |
if (curSize == 0) | |
return SZ_ERROR_INPUT_EOF; | |
memcpy(outBuffer, inBuf, curSize); | |
outBuffer += curSize; | |
inSize -= curSize; | |
RINOK(inStream->Skip((void *)inStream, curSize)); | |
} | |
return SZ_OK; | |
} | |
static Bool IS_MAIN_METHOD(UInt32 m) | |
{ | |
switch (m) | |
{ | |
case k_Copy: | |
case k_LZMA: | |
#ifndef _7Z_NO_METHOD_LZMA2 | |
case k_LZMA2: | |
#endif | |
#ifdef _7ZIP_PPMD_SUPPPORT | |
case k_PPMD: | |
#endif | |
return True; | |
} | |
return False; | |
} | |
static Bool IS_SUPPORTED_CODER(const CSzCoderInfo *c) | |
{ | |
return | |
c->NumStreams == 1 | |
/* && c->MethodID <= (UInt32)0xFFFFFFFF */ | |
&& IS_MAIN_METHOD((UInt32)c->MethodID); | |
} | |
#define IS_BCJ2(c) ((c)->MethodID == k_BCJ2 && (c)->NumStreams == 4) | |
static SRes CheckSupportedFolder(const CSzFolder *f) | |
{ | |
if (f->NumCoders < 1 || f->NumCoders > 4) | |
return SZ_ERROR_UNSUPPORTED; | |
if (!IS_SUPPORTED_CODER(&f->Coders[0])) | |
return SZ_ERROR_UNSUPPORTED; | |
if (f->NumCoders == 1) | |
{ | |
if (f->NumPackStreams != 1 || f->PackStreams[0] != 0 || f->NumBonds != 0) | |
return SZ_ERROR_UNSUPPORTED; | |
return SZ_OK; | |
} | |
#ifndef _7Z_NO_METHODS_FILTERS | |
if (f->NumCoders == 2) | |
{ | |
const CSzCoderInfo *c = &f->Coders[1]; | |
if ( | |
/* c->MethodID > (UInt32)0xFFFFFFFF || */ | |
c->NumStreams != 1 | |
|| f->NumPackStreams != 1 | |
|| f->PackStreams[0] != 0 | |
|| f->NumBonds != 1 | |
|| f->Bonds[0].InIndex != 1 | |
|| f->Bonds[0].OutIndex != 0) | |
return SZ_ERROR_UNSUPPORTED; | |
switch ((UInt32)c->MethodID) | |
{ | |
case k_Delta: | |
case k_BCJ: | |
case k_PPC: | |
case k_IA64: | |
case k_SPARC: | |
case k_ARM: | |
case k_ARMT: | |
break; | |
default: | |
return SZ_ERROR_UNSUPPORTED; | |
} | |
return SZ_OK; | |
} | |
#endif | |
if (f->NumCoders == 4) | |
{ | |
if (!IS_SUPPORTED_CODER(&f->Coders[1]) | |
|| !IS_SUPPORTED_CODER(&f->Coders[2]) | |
|| !IS_BCJ2(&f->Coders[3])) | |
return SZ_ERROR_UNSUPPORTED; | |
if (f->NumPackStreams != 4 | |
|| f->PackStreams[0] != 2 | |
|| f->PackStreams[1] != 6 | |
|| f->PackStreams[2] != 1 | |
|| f->PackStreams[3] != 0 | |
|| f->NumBonds != 3 | |
|| f->Bonds[0].InIndex != 5 || f->Bonds[0].OutIndex != 0 | |
|| f->Bonds[1].InIndex != 4 || f->Bonds[1].OutIndex != 1 | |
|| f->Bonds[2].InIndex != 3 || f->Bonds[2].OutIndex != 2) | |
return SZ_ERROR_UNSUPPORTED; | |
return SZ_OK; | |
} | |
return SZ_ERROR_UNSUPPORTED; | |
} | |
#define CASE_BRA_CONV(isa) case k_ ## isa: isa ## _Convert(outBuffer, outSize, 0, 0); break; | |
static SRes SzFolder_Decode2(const CSzFolder *folder, | |
const Byte *propsData, | |
const UInt64 *unpackSizes, | |
const UInt64 *packPositions, | |
ILookInStream *inStream, UInt64 startPos, | |
Byte *outBuffer, SizeT outSize, ISzAlloc *allocMain, | |
Byte *tempBuf[]) | |
{ | |
UInt32 ci; | |
SizeT tempSizes[3] = { 0, 0, 0}; | |
SizeT tempSize3 = 0; | |
Byte *tempBuf3 = 0; | |
RINOK(CheckSupportedFolder(folder)); | |
for (ci = 0; ci < folder->NumCoders; ci++) | |
{ | |
const CSzCoderInfo *coder = &folder->Coders[ci]; | |
if (IS_MAIN_METHOD((UInt32)coder->MethodID)) | |
{ | |
UInt32 si = 0; | |
UInt64 offset; | |
UInt64 inSize; | |
Byte *outBufCur = outBuffer; | |
SizeT outSizeCur = outSize; | |
if (folder->NumCoders == 4) | |
{ | |
UInt32 indices[] = { 3, 2, 0 }; | |
UInt64 unpackSize = unpackSizes[ci]; | |
si = indices[ci]; | |
if (ci < 2) | |
{ | |
Byte *temp; | |
outSizeCur = (SizeT)unpackSize; | |
if (outSizeCur != unpackSize) | |
return SZ_ERROR_MEM; | |
temp = (Byte *)IAlloc_Alloc(allocMain, outSizeCur); | |
if (!temp && outSizeCur != 0) | |
return SZ_ERROR_MEM; | |
outBufCur = tempBuf[1 - ci] = temp; | |
tempSizes[1 - ci] = outSizeCur; | |
} | |
else if (ci == 2) | |
{ | |
if (unpackSize > outSize) /* check it */ | |
return SZ_ERROR_PARAM; | |
tempBuf3 = outBufCur = outBuffer + (outSize - (size_t)unpackSize); | |
tempSize3 = outSizeCur = (SizeT)unpackSize; | |
} | |
else | |
return SZ_ERROR_UNSUPPORTED; | |
} | |
offset = packPositions[si]; | |
inSize = packPositions[si + 1] - offset; | |
RINOK(LookInStream_SeekTo(inStream, startPos + offset)); | |
if (coder->MethodID == k_Copy) | |
{ | |
if (inSize != outSizeCur) /* check it */ | |
return SZ_ERROR_DATA; | |
RINOK(SzDecodeCopy(inSize, inStream, outBufCur)); | |
} | |
else if (coder->MethodID == k_LZMA) | |
{ | |
RINOK(SzDecodeLzma(propsData + coder->PropsOffset, coder->PropsSize, inSize, inStream, outBufCur, outSizeCur, allocMain)); | |
} | |
#ifndef _7Z_NO_METHOD_LZMA2 | |
else if (coder->MethodID == k_LZMA2) | |
{ | |
RINOK(SzDecodeLzma2(propsData + coder->PropsOffset, coder->PropsSize, inSize, inStream, outBufCur, outSizeCur, allocMain)); | |
} | |
#endif | |
#ifdef _7ZIP_PPMD_SUPPPORT | |
else if (coder->MethodID == k_PPMD) | |
{ | |
RINOK(SzDecodePpmd(propsData + coder->PropsOffset, coder->PropsSize, inSize, inStream, outBufCur, outSizeCur, allocMain)); | |
} | |
#endif | |
else | |
return SZ_ERROR_UNSUPPORTED; | |
} | |
else if (coder->MethodID == k_BCJ2) | |
{ | |
UInt64 offset = packPositions[1]; | |
UInt64 s3Size = packPositions[2] - offset; | |
if (ci != 3) | |
return SZ_ERROR_UNSUPPORTED; | |
tempSizes[2] = (SizeT)s3Size; | |
if (tempSizes[2] != s3Size) | |
return SZ_ERROR_MEM; | |
tempBuf[2] = (Byte *)IAlloc_Alloc(allocMain, tempSizes[2]); | |
if (!tempBuf[2] && tempSizes[2] != 0) | |
return SZ_ERROR_MEM; | |
RINOK(LookInStream_SeekTo(inStream, startPos + offset)); | |
RINOK(SzDecodeCopy(s3Size, inStream, tempBuf[2])); | |
if ((tempSizes[0] & 3) != 0 || | |
(tempSizes[1] & 3) != 0 || | |
tempSize3 + tempSizes[0] + tempSizes[1] != outSize) | |
return SZ_ERROR_DATA; | |
{ | |
CBcj2Dec p; | |
p.bufs[0] = tempBuf3; p.lims[0] = tempBuf3 + tempSize3; | |
p.bufs[1] = tempBuf[0]; p.lims[1] = tempBuf[0] + tempSizes[0]; | |
p.bufs[2] = tempBuf[1]; p.lims[2] = tempBuf[1] + tempSizes[1]; | |
p.bufs[3] = tempBuf[2]; p.lims[3] = tempBuf[2] + tempSizes[2]; | |
p.dest = outBuffer; | |
p.destLim = outBuffer + outSize; | |
Bcj2Dec_Init(&p); | |
RINOK(Bcj2Dec_Decode(&p)); | |
{ | |
unsigned i; | |
for (i = 0; i < 4; i++) | |
if (p.bufs[i] != p.lims[i]) | |
return SZ_ERROR_DATA; | |
if (!Bcj2Dec_IsFinished(&p)) | |
return SZ_ERROR_DATA; | |
if (p.dest != p.destLim | |
|| p.state != BCJ2_STREAM_MAIN) | |
return SZ_ERROR_DATA; | |
} | |
} | |
} | |
#ifndef _7Z_NO_METHODS_FILTERS | |
else if (ci == 1) | |
{ | |
if (coder->MethodID == k_Delta) | |
{ | |
if (coder->PropsSize != 1) | |
return SZ_ERROR_UNSUPPORTED; | |
{ | |
Byte state[DELTA_STATE_SIZE]; | |
Delta_Init(state); | |
Delta_Decode(state, (unsigned)(propsData[coder->PropsOffset]) + 1, outBuffer, outSize); | |
} | |
} | |
else | |
{ | |
if (coder->PropsSize != 0) | |
return SZ_ERROR_UNSUPPORTED; | |
switch (coder->MethodID) | |
{ | |
case k_BCJ: | |
{ | |
UInt32 state; | |
x86_Convert_Init(state); | |
x86_Convert(outBuffer, outSize, 0, &state, 0); | |
break; | |
} | |
CASE_BRA_CONV(PPC) | |
CASE_BRA_CONV(IA64) | |
CASE_BRA_CONV(SPARC) | |
CASE_BRA_CONV(ARM) | |
CASE_BRA_CONV(ARMT) | |
default: | |
return SZ_ERROR_UNSUPPORTED; | |
} | |
} | |
} | |
#endif | |
else | |
return SZ_ERROR_UNSUPPORTED; | |
} | |
return SZ_OK; | |
} | |
SRes SzAr_DecodeFolder(const CSzAr *p, UInt32 folderIndex, | |
ILookInStream *inStream, UInt64 startPos, | |
Byte *outBuffer, size_t outSize, | |
ISzAlloc *allocMain) | |
{ | |
SRes res; | |
CSzFolder folder; | |
CSzData sd; | |
const Byte *data = p->CodersData + p->FoCodersOffsets[folderIndex]; | |
sd.Data = data; | |
sd.Size = p->FoCodersOffsets[folderIndex + 1] - p->FoCodersOffsets[folderIndex]; | |
res = SzGetNextFolderItem(&folder, &sd); | |
if (res != SZ_OK) | |
return res; | |
if (sd.Size != 0 | |
|| folder.UnpackStream != p->FoToMainUnpackSizeIndex[folderIndex] | |
|| outSize != SzAr_GetFolderUnpackSize(p, folderIndex)) | |
return SZ_ERROR_FAIL; | |
{ | |
unsigned i; | |
Byte *tempBuf[3] = { 0, 0, 0}; | |
res = SzFolder_Decode2(&folder, data, | |
&p->CoderUnpackSizes[p->FoToCoderUnpackSizes[folderIndex]], | |
p->PackPositions + p->FoStartPackStreamIndex[folderIndex], | |
inStream, startPos, | |
outBuffer, (SizeT)outSize, allocMain, tempBuf); | |
for (i = 0; i < 3; i++) | |
IAlloc_Free(allocMain, tempBuf[i]); | |
if (res == SZ_OK) | |
if (SzBitWithVals_Check(&p->FolderCRCs, folderIndex)) | |
if (CrcCalc(outBuffer, outSize) != p->FolderCRCs.Vals[folderIndex]) | |
res = SZ_ERROR_CRC; | |
return res; | |
} | |
} |