/
HashCalc.cpp
2118 lines (1828 loc) · 46.9 KB
/
HashCalc.cpp
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// HashCalc.cpp
#include "StdAfx.h"
#include "../../../../C/Alloc.h"
#include "../../../../C/CpuArch.h"
#include "../../../Common/DynLimBuf.h"
#include "../../../Common/IntToString.h"
#include "../../../Common/StringToInt.h"
#include "../../Common/FileStreams.h"
#include "../../Common/ProgressUtils.h"
#include "../../Common/StreamObjects.h"
#include "../../Common/StreamUtils.h"
#include "../../Archive/Common/ItemNameUtils.h"
#include "../../Archive/IArchive.h"
#ifdef WANT_OPTIONAL_LOWERCASE
#include "../FileManager/RegistryUtils.h"
#endif
#include "EnumDirItems.h"
#include "HashCalc.h"
using namespace NWindows;
#ifdef EXTERNAL_CODECS
extern const CExternalCodecs *g_ExternalCodecs_Ptr;
#endif
class CHashMidBuf
{
void *_data;
public:
CHashMidBuf(): _data(NULL) {}
operator void *() { return _data; }
bool Alloc(size_t size)
{
if (_data)
return false;
_data = ::MidAlloc(size);
return _data != NULL;
}
~CHashMidBuf() { ::MidFree(_data); }
};
static const char * const k_DefaultHashMethod = "CRC32";
HRESULT CHashBundle::SetMethods(DECL_EXTERNAL_CODECS_LOC_VARS const UStringVector &hashMethods)
{
UStringVector names = hashMethods;
if (names.IsEmpty())
names.Add(UString(k_DefaultHashMethod));
CRecordVector<CMethodId> ids;
CObjectVector<COneMethodInfo> methods;
unsigned i;
for (i = 0; i < names.Size(); i++)
{
COneMethodInfo m;
RINOK(m.ParseMethodFromString(names[i]));
if (m.MethodName.IsEmpty())
m.MethodName = k_DefaultHashMethod;
if (m.MethodName == "*")
{
CRecordVector<CMethodId> tempMethods;
GetHashMethods(EXTERNAL_CODECS_LOC_VARS tempMethods);
methods.Clear();
ids.Clear();
FOR_VECTOR (t, tempMethods)
{
unsigned index = ids.AddToUniqueSorted(tempMethods[t]);
if (ids.Size() != methods.Size())
methods.Insert(index, m);
}
break;
}
else
{
// m.MethodName.RemoveChar(L'-');
CMethodId id;
if (!FindHashMethod(EXTERNAL_CODECS_LOC_VARS m.MethodName, id))
return E_NOTIMPL;
unsigned index = ids.AddToUniqueSorted(id);
if (ids.Size() != methods.Size())
methods.Insert(index, m);
}
}
for (i = 0; i < ids.Size(); i++)
{
CMyComPtr<IHasher> hasher;
AString name;
RINOK(CreateHasher(EXTERNAL_CODECS_LOC_VARS ids[i], name, hasher));
if (!hasher)
throw "Can't create hasher";
const COneMethodInfo &m = methods[i];
{
CMyComPtr<ICompressSetCoderProperties> scp;
hasher.QueryInterface(IID_ICompressSetCoderProperties, &scp);
if (scp)
RINOK(m.SetCoderProps(scp, NULL));
}
const UInt32 digestSize = hasher->GetDigestSize();
if (digestSize > k_HashCalc_DigestSize_Max)
return E_NOTIMPL;
CHasherState &h = Hashers.AddNew();
h.DigestSize = digestSize;
h.Hasher = hasher;
h.Name = name;
for (unsigned k = 0; k < k_HashCalc_NumGroups; k++)
h.InitDigestGroup(k);
}
return S_OK;
}
void CHashBundle::InitForNewFile()
{
CurSize = 0;
FOR_VECTOR (i, Hashers)
{
CHasherState &h = Hashers[i];
h.Hasher->Init();
h.InitDigestGroup(k_HashCalc_Index_Current);
}
}
void CHashBundle::Update(const void *data, UInt32 size)
{
CurSize += size;
FOR_VECTOR (i, Hashers)
Hashers[i].Hasher->Update(data, size);
}
void CHashBundle::SetSize(UInt64 size)
{
CurSize = size;
}
static void AddDigests(Byte *dest, const Byte *src, UInt32 size)
{
unsigned next = 0;
/*
// we could use big-endian addition for sha-1 and sha-256
// but another hashers are little-endian
if (size > 8)
{
for (unsigned i = size; i != 0;)
{
i--;
next += (unsigned)dest[i] + (unsigned)src[i];
dest[i] = (Byte)next;
next >>= 8;
}
}
else
*/
{
for (unsigned i = 0; i < size; i++)
{
next += (unsigned)dest[i] + (unsigned)src[i];
dest[i] = (Byte)next;
next >>= 8;
}
}
// we use little-endian to store extra bytes
dest += k_HashCalc_DigestSize_Max;
for (unsigned i = 0; i < k_HashCalc_ExtraSize; i++)
{
next += (unsigned)dest[i];
dest[i] = (Byte)next;
next >>= 8;
}
}
void CHasherState::AddDigest(unsigned groupIndex, const Byte *data)
{
NumSums[groupIndex]++;
AddDigests(Digests[groupIndex], data, DigestSize);
}
void CHashBundle::Final(bool isDir, bool isAltStream, const UString &path)
{
if (isDir)
NumDirs++;
else if (isAltStream)
{
NumAltStreams++;
AltStreamsSize += CurSize;
}
else
{
NumFiles++;
FilesSize += CurSize;
}
Byte pre[16];
memset(pre, 0, sizeof(pre));
if (isDir)
pre[0] = 1;
FOR_VECTOR (i, Hashers)
{
CHasherState &h = Hashers[i];
if (!isDir)
{
h.Hasher->Final(h.Digests[0]); // k_HashCalc_Index_Current
if (!isAltStream)
h.AddDigest(k_HashCalc_Index_DataSum, h.Digests[0]);
}
h.Hasher->Init();
h.Hasher->Update(pre, sizeof(pre));
h.Hasher->Update(h.Digests[0], h.DigestSize);
for (unsigned k = 0; k < path.Len(); k++)
{
wchar_t c = path[k];
// 21.04: we want same hash for linux and windows paths
#if CHAR_PATH_SEPARATOR != '/'
if (c == CHAR_PATH_SEPARATOR)
c = '/';
// if (c == (wchar_t)('\\' + 0xf000)) c = '\\'; // to debug WSL
// if (c > 0xf000 && c < 0xf080) c -= 0xf000; // to debug WSL
#endif
Byte temp[2] = { (Byte)(c & 0xFF), (Byte)((c >> 8) & 0xFF) };
h.Hasher->Update(temp, 2);
}
Byte tempDigest[k_HashCalc_DigestSize_Max];
h.Hasher->Final(tempDigest);
if (!isAltStream)
h.AddDigest(k_HashCalc_Index_NamesSum, tempDigest);
h.AddDigest(k_HashCalc_Index_StreamsSum, tempDigest);
}
}
static void CSum_Name_OriginalToEscape(const AString &src, AString &dest)
{
dest.Empty();
for (unsigned i = 0; i < src.Len();)
{
char c = src[i++];
if (c == '\n')
{
dest += '\\';
c = 'n';
}
else if (c == '\\')
dest += '\\';
dest += c;
}
}
static bool CSum_Name_EscapeToOriginal(const char *s, AString &dest)
{
bool isOK = true;
dest.Empty();
for (;;)
{
char c = *s++;
if (c == 0)
break;
if (c == '\\')
{
const char c1 = *s;
if (c1 == 'n')
{
c = '\n';
s++;
}
else if (c1 == '\\')
{
c = c1;
s++;
}
else
{
// original md5sum returns NULL for such bad strings
isOK = false;
}
}
dest += c;
}
return isOK;
}
static void SetSpacesAndNul(char *s, unsigned num)
{
for (unsigned i = 0; i < num; i++)
s[i] = ' ';
s[num] = 0;
}
static const unsigned kHashColumnWidth_Min = 4 * 2;
static unsigned GetColumnWidth(unsigned digestSize)
{
const unsigned width = digestSize * 2;
return width < kHashColumnWidth_Min ? kHashColumnWidth_Min: width;
}
static void AddHashResultLine(
AString &_s,
// bool showHash,
// UInt64 fileSize, bool showSize,
const CObjectVector<CHasherState> &hashers
// unsigned digestIndex, = k_HashCalc_Index_Current
)
{
FOR_VECTOR (i, hashers)
{
const CHasherState &h = hashers[i];
char s[k_HashCalc_DigestSize_Max * 2 + 64];
s[0] = 0;
// if (showHash)
HashHexToString(s, h.Digests[k_HashCalc_Index_Current], h.DigestSize);
const unsigned pos = (unsigned)strlen(s);
const int numSpaces = (int)GetColumnWidth(h.DigestSize) - (int)pos;
if (numSpaces > 0)
SetSpacesAndNul(s + pos, (unsigned)numSpaces);
if (i != 0)
_s += ' ';
_s += s;
}
/*
if (showSize)
{
_s += ' ';
static const unsigned kSizeField_Len = 13; // same as in HashCon.cpp
char s[kSizeField_Len + 32];
char *p = s;
SetSpacesAndNul(s, kSizeField_Len);
p = s + kSizeField_Len;
ConvertUInt64ToString(fileSize, p);
int numSpaces = (int)kSizeField_Len - (int)strlen(p);
if (numSpaces > 0)
p -= (unsigned)numSpaces;
_s += p;
}
*/
}
static void Add_LF(CDynLimBuf &hashFileString, const CHashOptionsLocal &options)
{
hashFileString += (char)(options.HashMode_Zero.Val ? 0 : '\n');
}
static void WriteLine(CDynLimBuf &hashFileString,
const CHashOptionsLocal &options,
const UString &path2,
bool isDir,
const AString &methodName,
const AString &hashesString)
{
if (options.HashMode_OnlyHash.Val)
{
hashFileString += hashesString;
Add_LF(hashFileString, options);
return;
}
UString path = path2;
bool isBin = false;
const bool zeroMode = options.HashMode_Zero.Val;
const bool tagMode = options.HashMode_Tag.Val;
#if CHAR_PATH_SEPARATOR != '/'
path.Replace(WCHAR_PATH_SEPARATOR, L'/');
// path.Replace((wchar_t)('\\' + 0xf000), L'\\'); // to debug WSL
#endif
AString utf8;
ConvertUnicodeToUTF8(path, utf8);
AString esc;
CSum_Name_OriginalToEscape(utf8, esc);
if (!zeroMode)
{
if (esc != utf8)
{
/* Original md5sum writes escape in that case.
We do same for compatibility with original md5sum. */
hashFileString += '\\';
}
}
if (isDir && !esc.IsEmpty() && esc.Back() != '/')
esc += '/';
if (tagMode)
{
if (!methodName.IsEmpty())
{
hashFileString += methodName;
hashFileString += ' ';
}
hashFileString += '(';
hashFileString += esc;
hashFileString += ')';
hashFileString += " = ";
}
hashFileString += hashesString;
if (!tagMode)
{
hashFileString += ' ';
hashFileString += (char)(isBin ? '*' : ' ');
hashFileString += esc;
}
Add_LF(hashFileString, options);
}
static void WriteLine(CDynLimBuf &hashFileString,
const CHashOptionsLocal &options,
const UString &path,
bool isDir,
const CHashBundle &hb)
{
AString methodName;
if (!hb.Hashers.IsEmpty())
methodName = hb.Hashers[0].Name;
AString hashesString;
AddHashResultLine(hashesString, hb.Hashers);
WriteLine(hashFileString, options, path, isDir, methodName, hashesString);
}
HRESULT HashCalc(
DECL_EXTERNAL_CODECS_LOC_VARS
const NWildcard::CCensor &censor,
const CHashOptions &options,
AString &errorInfo,
IHashCallbackUI *callback)
{
CDirItems dirItems;
dirItems.Callback = callback;
if (options.StdInMode)
{
CDirItem di;
di.Size = (UInt64)(Int64)-1;
di.SetAsFile();
dirItems.Items.Add(di);
}
else
{
RINOK(callback->StartScanning());
dirItems.SymLinks = options.SymLinks.Val;
dirItems.ScanAltStreams = options.AltStreamsMode;
dirItems.ExcludeDirItems = censor.ExcludeDirItems;
dirItems.ExcludeFileItems = censor.ExcludeFileItems;
dirItems.ShareForWrite = options.OpenShareForWrite;
HRESULT res = EnumerateItems(censor,
options.PathMode,
UString(),
dirItems);
if (res != S_OK)
{
if (res != E_ABORT)
errorInfo = "Scanning error";
return res;
}
RINOK(callback->FinishScanning(dirItems.Stat));
}
unsigned i;
CHashBundle hb;
RINOK(hb.SetMethods(EXTERNAL_CODECS_LOC_VARS options.Methods));
// hb.Init();
hb.NumErrors = dirItems.Stat.NumErrors;
UInt64 totalSize = 0;
if (options.StdInMode)
{
RINOK(callback->SetNumFiles(1));
}
else
{
totalSize = dirItems.Stat.GetTotalBytes();
RINOK(callback->SetTotal(totalSize));
}
const UInt32 kBufSize = 1 << 15;
CHashMidBuf buf;
if (!buf.Alloc(kBufSize))
return E_OUTOFMEMORY;
UInt64 completeValue = 0;
RINOK(callback->BeforeFirstFile(hb));
/*
CDynLimBuf hashFileString((size_t)1 << 31);
const bool needGenerate = !options.HashFilePath.IsEmpty();
*/
for (i = 0; i < dirItems.Items.Size(); i++)
{
CMyComPtr<ISequentialInStream> inStream;
UString path;
bool isDir = false;
bool isAltStream = false;
if (options.StdInMode)
{
inStream = new CStdInFileStream;
}
else
{
path = dirItems.GetLogPath(i);
const CDirItem &di = dirItems.Items[i];
#ifdef _WIN32
isAltStream = di.IsAltStream;
#endif
#ifndef UNDER_CE
// if (di.AreReparseData())
if (di.ReparseData.Size() != 0)
{
CBufInStream *inStreamSpec = new CBufInStream();
inStream = inStreamSpec;
inStreamSpec->Init(di.ReparseData, di.ReparseData.Size());
}
else
#endif
{
CInFileStream *inStreamSpec = new CInFileStream;
inStreamSpec->Set_PreserveATime(options.PreserveATime);
inStream = inStreamSpec;
isDir = di.IsDir();
if (!isDir)
{
const FString phyPath = dirItems.GetPhyPath(i);
if (!inStreamSpec->OpenShared(phyPath, options.OpenShareForWrite))
{
HRESULT res = callback->OpenFileError(phyPath, ::GetLastError());
hb.NumErrors++;
if (res != S_FALSE)
return res;
continue;
}
if (!options.StdInMode)
{
UInt64 curSize = 0;
if (inStreamSpec->GetSize(&curSize) == S_OK)
{
if (curSize > di.Size)
{
totalSize += curSize - di.Size;
RINOK(callback->SetTotal(totalSize));
// printf("\ntotal = %d MiB\n", (unsigned)(totalSize >> 20));
}
}
}
// inStreamSpec->ReloadProps();
}
}
}
RINOK(callback->GetStream(path, isDir));
UInt64 fileSize = 0;
hb.InitForNewFile();
if (!isDir)
{
for (UInt32 step = 0;; step++)
{
if ((step & 0xFF) == 0)
{
// printf("\ncompl = %d\n", (unsigned)(completeValue >> 20));
RINOK(callback->SetCompleted(&completeValue));
}
UInt32 size;
RINOK(inStream->Read(buf, kBufSize, &size));
if (size == 0)
break;
hb.Update(buf, size);
fileSize += size;
completeValue += size;
}
}
hb.Final(isDir, isAltStream, path);
/*
if (needGenerate
&& (options.HashMode_Dirs.Val || !isDir))
{
WriteLine(hashFileString,
options,
path, // change it
isDir,
hb);
if (hashFileString.IsError())
return E_OUTOFMEMORY;
}
*/
RINOK(callback->SetOperationResult(fileSize, hb, !isDir));
RINOK(callback->SetCompleted(&completeValue));
}
/*
if (needGenerate)
{
NFile::NIO::COutFile file;
if (!file.Create(us2fs(options.HashFilePath), true)) // createAlways
return GetLastError_noZero_HRESULT();
if (!file.WriteFull(hashFileString, hashFileString.Len()))
return GetLastError_noZero_HRESULT();
}
*/
return callback->AfterLastFile(hb);
}
static inline char GetHex_Upper(unsigned v)
{
#ifdef WANT_OPTIONAL_LOWERCASE
if (WantLowercaseHashes())
return (char)((v < 10) ? ('0' + v) : ('a' + (v - 10)));
#endif
return (char)((v < 10) ? ('0' + v) : ('A' + (v - 10)));
}
static inline char GetHex_Lower(unsigned v)
{
#ifdef WANT_OPTIONAL_LOWERCASE
if (!WantLowercaseHashes())
return (char)((v < 10) ? ('0' + v) : ('A' + (v - 10)));
#endif
return (char)((v < 10) ? ('0' + v) : ('a' + (v - 10)));
}
void HashHexToString(char *dest, const Byte *data, UInt32 size)
{
dest[size * 2] = 0;
if (!data)
{
for (UInt32 i = 0; i < size; i++)
{
dest[0] = ' ';
dest[1] = ' ';
dest += 2;
}
return;
}
if (size <= 8)
{
dest += size * 2;
for (UInt32 i = 0; i < size; i++)
{
const unsigned b = data[i];
dest -= 2;
dest[0] = GetHex_Upper((b >> 4) & 0xF);
dest[1] = GetHex_Upper(b & 0xF);
}
}
else
{
for (UInt32 i = 0; i < size; i++)
{
const unsigned b = data[i];
dest[0] = GetHex_Lower((b >> 4) & 0xF);
dest[1] = GetHex_Lower(b & 0xF);
dest += 2;
}
}
}
void CHasherState::WriteToString(unsigned digestIndex, char *s) const
{
HashHexToString(s, Digests[digestIndex], DigestSize);
if (digestIndex != 0 && NumSums[digestIndex] != 1)
{
unsigned numExtraBytes = GetNumExtraBytes_for_Group(digestIndex);
if (numExtraBytes > 4)
numExtraBytes = 8;
else // if (numExtraBytes >= 0)
numExtraBytes = 4;
// if (numExtraBytes != 0)
{
s += strlen(s);
*s++ = '-';
// *s = 0;
HashHexToString(s, GetExtraData_for_Group(digestIndex), numExtraBytes);
}
}
}
// ---------- Hash Handler ----------
namespace NHash {
static size_t ParseHexString(const char *s, Byte *dest) throw()
{
size_t num;
for (num = 0;; num++, s += 2)
{
unsigned c = (Byte)s[0];
unsigned v0;
if (c >= '0' && c <= '9') v0 = (c - '0');
else if (c >= 'A' && c <= 'F') v0 = 10 + (c - 'A');
else if (c >= 'a' && c <= 'f') v0 = 10 + (c - 'a');
else
return num;
c = (Byte)s[1];
unsigned v1;
if (c >= '0' && c <= '9') v1 = (c - '0');
else if (c >= 'A' && c <= 'F') v1 = 10 + (c - 'A');
else if (c >= 'a' && c <= 'f') v1 = 10 + (c - 'a');
else
return num;
if (dest)
dest[num] = (Byte)(v1 | (v0 << 4));
}
}
#define IsWhite(c) ((c) == ' ' || (c) == '\t')
bool CHashPair::IsDir() const
{
if (Name.IsEmpty() || Name.Back() != '/')
return false;
// here we expect that Dir items contain only zeros or no Hash
for (size_t i = 0; i < Hash.Size(); i++)
if (Hash[i] != 0)
return false;
return true;
}
bool CHashPair::ParseCksum(const char *s)
{
const char *end;
const UInt32 crc = ConvertStringToUInt32(s, &end);
if (*end != ' ')
return false;
end++;
const UInt64 size = ConvertStringToUInt64(end, &end);
if (*end != ' ')
return false;
end++;
Name = end;
Hash.Alloc(4);
SetBe32(Hash, crc);
Size_from_Arc = size;
Size_from_Arc_Defined = true;
return true;
}
static const char *SkipWhite(const char *s)
{
while (IsWhite(*s))
s++;
return s;
}
static const char * const k_CsumMethodNames[] =
{
"sha256"
, "sha224"
// , "sha512/224"
// , "sha512/256"
, "sha512"
, "sha384"
, "sha1"
, "md5"
, "blake2b"
, "crc64"
, "crc32"
, "cksum"
};
static UString GetMethod_from_FileName(const UString &name)
{
AString s;
ConvertUnicodeToUTF8(name, s);
const int dotPos = s.ReverseFind_Dot();
const char *src = s.Ptr();
bool isExtension = false;
if (dotPos >= 0)
{
isExtension = true;
src = s.Ptr(dotPos + 1);
}
const char *m = "";
unsigned i;
for (i = 0; i < ARRAY_SIZE(k_CsumMethodNames); i++)
{
m = k_CsumMethodNames[i];
if (isExtension)
{
if (StringsAreEqual_Ascii(src, m))
break;
}
else if (IsString1PrefixedByString2_NoCase_Ascii(src, m))
if (StringsAreEqual_Ascii(src + strlen(m), "sums"))
break;
}
UString res;
if (i != ARRAY_SIZE(k_CsumMethodNames))
res = m;
return res;
}
bool CHashPair::Parse(const char *s)
{
// here we keep compatibility with original md5sum / shasum
bool escape = false;
s = SkipWhite(s);
if (*s == '\\')
{
s++;
escape = true;
}
// const char *kMethod = GetMethod_from_FileName(s);
// if (kMethod)
if (ParseHexString(s, NULL) < 4)
{
// BSD-style checksum line
{
const char *s2 = s;
for (; *s2 != 0; s2++)
{
const char c = *s2;
if (c == 0)
return false;
if (c == ' ' || c == '(')
break;
}
Method.SetFrom(s, (unsigned)(s2 - s));
s = s2;
}
IsBSD = true;
if (*s == ' ')
s++;
if (*s != '(')
return false;
s++;
{
const char *s2 = s;
for (; *s2 != 0; s2++)
{}
for (;;)
{
s2--;
if (s2 < s)
return false;
if (*s2 == ')')
break;
}
Name.SetFrom(s, (unsigned)(s2 - s));
s = s2 + 1;
}
s = SkipWhite(s);
if (*s != '=')
return false;
s++;
s = SkipWhite(s);
}
{
const size_t num = ParseHexString(s, NULL);
Hash.Alloc(num);
ParseHexString(s, Hash);
const size_t numChars = num * 2;
HashString.SetFrom(s, (unsigned)numChars);
s += numChars;
}
if (IsBSD)
{
if (*s != 0)
return false;
if (escape)
{
const AString temp (Name);
return CSum_Name_EscapeToOriginal(temp, Name);
}
return true;
}
if (*s == 0)
return true;
if (*s != ' ')
return false;
s++;
const char c = *s;
if (c != ' '
&& c != '*'
&& c != 'U' // shasum Universal
&& c != '^' // shasum 0/1
)
return false;
Mode = c;
s++;
if (escape)
return CSum_Name_EscapeToOriginal(s, Name);
Name = s;
return true;
}
static bool GetLine(CByteBuffer &buf, bool zeroMode, bool cr_lf_Mode, size_t &posCur, AString &s)
{
s.Empty();
size_t pos = posCur;
const Byte *p = buf;
unsigned numDigits = 0;
for (; pos < buf.Size(); pos++)
{
const Byte b = p[pos];
if (b == 0)
{
numDigits = 1;
break;
}
if (zeroMode)
continue;
if (b == 0x0a)
{
numDigits = 1;
break;
}
if (!cr_lf_Mode)
continue;
if (b == 0x0d)
{
if (pos + 1 >= buf.Size())
{
numDigits = 1;
break;
// return false;
}
if (p[pos + 1] == 0x0a)
{
numDigits = 2;
break;
}
}
}
s.SetFrom((const char *)(p + posCur), (unsigned)(pos - posCur));
posCur = pos + numDigits;
return true;