mirror of
https://github.com/hashcat/hashcat.git
synced 2024-12-24 07:28:10 +00:00
490 lines
11 KiB
C++
490 lines
11 KiB
C++
#define STARTL1 2
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static unsigned int DecL1[]={0x8000,0xa000,0xc000,0xd000,0xe000,0xea00,
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0xee00,0xf000,0xf200,0xf200,0xffff};
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static unsigned int PosL1[]={0,0,0,2,3,5,7,11,16,20,24,32,32};
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#define STARTL2 3
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static unsigned int DecL2[]={0xa000,0xc000,0xd000,0xe000,0xea00,0xee00,
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0xf000,0xf200,0xf240,0xffff};
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static unsigned int PosL2[]={0,0,0,0,5,7,9,13,18,22,26,34,36};
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#define STARTHF0 4
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static unsigned int DecHf0[]={0x8000,0xc000,0xe000,0xf200,0xf200,0xf200,
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0xf200,0xf200,0xffff};
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static unsigned int PosHf0[]={0,0,0,0,0,8,16,24,33,33,33,33,33};
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#define STARTHF1 5
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static unsigned int DecHf1[]={0x2000,0xc000,0xe000,0xf000,0xf200,0xf200,
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0xf7e0,0xffff};
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static unsigned int PosHf1[]={0,0,0,0,0,0,4,44,60,76,80,80,127};
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#define STARTHF2 5
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static unsigned int DecHf2[]={0x1000,0x2400,0x8000,0xc000,0xfa00,0xffff,
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0xffff,0xffff};
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static unsigned int PosHf2[]={0,0,0,0,0,0,2,7,53,117,233,0,0};
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#define STARTHF3 6
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static unsigned int DecHf3[]={0x800,0x2400,0xee00,0xfe80,0xffff,0xffff,
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0xffff};
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static unsigned int PosHf3[]={0,0,0,0,0,0,0,2,16,218,251,0,0};
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#define STARTHF4 8
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static unsigned int DecHf4[]={0xff00,0xffff,0xffff,0xffff,0xffff,0xffff};
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static unsigned int PosHf4[]={0,0,0,0,0,0,0,0,0,255,0,0,0};
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void Unpack::Unpack15(bool Solid)
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{
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UnpInitData(Solid);
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UnpInitData15(Solid);
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UnpReadBuf();
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if (!Solid)
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{
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InitHuff();
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UnpPtr=0;
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}
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else
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UnpPtr=WrPtr;
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--DestUnpSize;
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if (DestUnpSize>=0)
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{
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GetFlagsBuf();
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FlagsCnt=8;
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}
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while (DestUnpSize>=0)
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{
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UnpPtr&=MaxWinMask;
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if (Inp.InAddr>ReadTop-30 && !UnpReadBuf())
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break;
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if (((WrPtr-UnpPtr) & MaxWinMask)<270 && WrPtr!=UnpPtr)
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UnpWriteBuf20();
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if (StMode)
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{
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HuffDecode();
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continue;
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}
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if (--FlagsCnt < 0)
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{
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GetFlagsBuf();
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FlagsCnt=7;
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}
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if (FlagBuf & 0x80)
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{
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FlagBuf<<=1;
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if (Nlzb > Nhfb)
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LongLZ();
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else
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HuffDecode();
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}
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else
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{
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FlagBuf<<=1;
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if (--FlagsCnt < 0)
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{
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GetFlagsBuf();
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FlagsCnt=7;
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}
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if (FlagBuf & 0x80)
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{
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FlagBuf<<=1;
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if (Nlzb > Nhfb)
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HuffDecode();
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else
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LongLZ();
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}
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else
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{
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FlagBuf<<=1;
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ShortLZ();
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}
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}
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}
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UnpWriteBuf20();
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}
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#define GetShortLen1(pos) ((pos)==1 ? Buf60+3:ShortLen1[pos])
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#define GetShortLen2(pos) ((pos)==3 ? Buf60+3:ShortLen2[pos])
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void Unpack::ShortLZ()
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{
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static unsigned int ShortLen1[]={1,3,4,4,5,6,7,8,8,4,4,5,6,6,4,0};
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static unsigned int ShortXor1[]={0,0xa0,0xd0,0xe0,0xf0,0xf8,0xfc,0xfe,
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0xff,0xc0,0x80,0x90,0x98,0x9c,0xb0};
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static unsigned int ShortLen2[]={2,3,3,3,4,4,5,6,6,4,4,5,6,6,4,0};
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static unsigned int ShortXor2[]={0,0x40,0x60,0xa0,0xd0,0xe0,0xf0,0xf8,
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0xfc,0xc0,0x80,0x90,0x98,0x9c,0xb0};
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unsigned int Length,SaveLength;
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unsigned int LastDistance;
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unsigned int Distance;
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int DistancePlace;
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NumHuf=0;
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unsigned int BitField=Inp.fgetbits();
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if (LCount==2)
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{
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Inp.faddbits(1);
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if (BitField >= 0x8000)
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{
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CopyString15((unsigned int)LastDist,LastLength);
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return;
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}
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BitField <<= 1;
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LCount=0;
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}
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BitField>>=8;
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// not thread safe, replaced by GetShortLen1 and GetShortLen2 macro
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// ShortLen1[1]=ShortLen2[3]=Buf60+3;
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if (AvrLn1<37)
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{
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for (Length=0;;Length++)
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if (((BitField^ShortXor1[Length]) & (~(0xff>>GetShortLen1(Length))))==0)
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break;
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Inp.faddbits(GetShortLen1(Length));
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}
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else
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{
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for (Length=0;;Length++)
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if (((BitField^ShortXor2[Length]) & (~(0xff>>GetShortLen2(Length))))==0)
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break;
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Inp.faddbits(GetShortLen2(Length));
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}
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if (Length >= 9)
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{
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if (Length == 9)
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{
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LCount++;
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CopyString15((unsigned int)LastDist,LastLength);
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return;
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}
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if (Length == 14)
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{
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LCount=0;
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Length=DecodeNum(Inp.fgetbits(),STARTL2,DecL2,PosL2)+5;
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Distance=(Inp.fgetbits()>>1) | 0x8000;
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Inp.faddbits(15);
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LastLength=Length;
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LastDist=Distance;
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CopyString15(Distance,Length);
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return;
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}
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LCount=0;
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SaveLength=Length;
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Distance=OldDist[(OldDistPtr-(Length-9)) & 3];
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Length=DecodeNum(Inp.fgetbits(),STARTL1,DecL1,PosL1)+2;
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if (Length==0x101 && SaveLength==10)
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{
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Buf60 ^= 1;
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return;
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}
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if (Distance > 256)
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Length++;
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if (Distance >= MaxDist3)
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Length++;
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OldDist[OldDistPtr++]=Distance;
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OldDistPtr = OldDistPtr & 3;
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LastLength=Length;
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LastDist=Distance;
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CopyString15(Distance,Length);
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return;
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}
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LCount=0;
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AvrLn1 += Length;
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AvrLn1 -= AvrLn1 >> 4;
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DistancePlace=DecodeNum(Inp.fgetbits(),STARTHF2,DecHf2,PosHf2) & 0xff;
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Distance=ChSetA[DistancePlace];
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if (--DistancePlace != -1)
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{
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LastDistance=ChSetA[DistancePlace];
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ChSetA[DistancePlace+1]=LastDistance;
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ChSetA[DistancePlace]=Distance;
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}
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Length+=2;
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OldDist[OldDistPtr++] = ++Distance;
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OldDistPtr = OldDistPtr & 3;
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LastLength=Length;
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LastDist=Distance;
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CopyString15(Distance,Length);
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}
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void Unpack::LongLZ()
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{
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unsigned int Length;
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unsigned int Distance;
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unsigned int DistancePlace,NewDistancePlace;
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unsigned int OldAvr2,OldAvr3;
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NumHuf=0;
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Nlzb+=16;
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if (Nlzb > 0xff)
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{
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Nlzb=0x90;
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Nhfb >>= 1;
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}
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OldAvr2=AvrLn2;
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unsigned int BitField=Inp.fgetbits();
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if (AvrLn2 >= 122)
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Length=DecodeNum(BitField,STARTL2,DecL2,PosL2);
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else
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if (AvrLn2 >= 64)
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Length=DecodeNum(BitField,STARTL1,DecL1,PosL1);
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else
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if (BitField < 0x100)
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{
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Length=BitField;
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Inp.faddbits(16);
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}
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else
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{
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for (Length=0;((BitField<<Length)&0x8000)==0;Length++)
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;
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Inp.faddbits(Length+1);
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}
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AvrLn2 += Length;
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AvrLn2 -= AvrLn2 >> 5;
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BitField=Inp.fgetbits();
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if (AvrPlcB > 0x28ff)
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DistancePlace=DecodeNum(BitField,STARTHF2,DecHf2,PosHf2);
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else
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if (AvrPlcB > 0x6ff)
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DistancePlace=DecodeNum(BitField,STARTHF1,DecHf1,PosHf1);
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else
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DistancePlace=DecodeNum(BitField,STARTHF0,DecHf0,PosHf0);
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AvrPlcB += DistancePlace;
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AvrPlcB -= AvrPlcB >> 8;
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while (1)
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{
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Distance = ChSetB[DistancePlace & 0xff];
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NewDistancePlace = NToPlB[Distance++ & 0xff]++;
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if (!(Distance & 0xff))
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CorrHuff(ChSetB,NToPlB);
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else
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break;
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}
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ChSetB[DistancePlace & 0xff]=ChSetB[NewDistancePlace];
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ChSetB[NewDistancePlace]=Distance;
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Distance=((Distance & 0xff00) | (Inp.fgetbits() >> 8)) >> 1;
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Inp.faddbits(7);
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OldAvr3=AvrLn3;
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if (Length!=1 && Length!=4)
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if (Length==0 && Distance <= MaxDist3)
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{
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AvrLn3++;
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AvrLn3 -= AvrLn3 >> 8;
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}
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else
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if (AvrLn3 > 0)
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AvrLn3--;
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Length+=3;
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if (Distance >= MaxDist3)
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Length++;
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if (Distance <= 256)
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Length+=8;
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if (OldAvr3 > 0xb0 || AvrPlc >= 0x2a00 && OldAvr2 < 0x40)
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MaxDist3=0x7f00;
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else
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MaxDist3=0x2001;
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OldDist[OldDistPtr++]=Distance;
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OldDistPtr = OldDistPtr & 3;
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LastLength=Length;
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LastDist=Distance;
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CopyString15(Distance,Length);
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}
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void Unpack::HuffDecode()
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{
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unsigned int CurByte,NewBytePlace;
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unsigned int Length;
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unsigned int Distance;
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int BytePlace;
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unsigned int BitField=Inp.fgetbits();
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if (AvrPlc > 0x75ff)
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BytePlace=DecodeNum(BitField,STARTHF4,DecHf4,PosHf4);
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else
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if (AvrPlc > 0x5dff)
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BytePlace=DecodeNum(BitField,STARTHF3,DecHf3,PosHf3);
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else
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if (AvrPlc > 0x35ff)
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BytePlace=DecodeNum(BitField,STARTHF2,DecHf2,PosHf2);
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else
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if (AvrPlc > 0x0dff)
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BytePlace=DecodeNum(BitField,STARTHF1,DecHf1,PosHf1);
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else
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BytePlace=DecodeNum(BitField,STARTHF0,DecHf0,PosHf0);
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BytePlace&=0xff;
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if (StMode)
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{
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if (BytePlace==0 && BitField > 0xfff)
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BytePlace=0x100;
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if (--BytePlace==-1)
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{
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BitField=Inp.fgetbits();
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Inp.faddbits(1);
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if (BitField & 0x8000)
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{
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NumHuf=StMode=0;
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return;
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}
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else
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{
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Length = (BitField & 0x4000) ? 4 : 3;
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Inp.faddbits(1);
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Distance=DecodeNum(Inp.fgetbits(),STARTHF2,DecHf2,PosHf2);
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Distance = (Distance << 5) | (Inp.fgetbits() >> 11);
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Inp.faddbits(5);
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CopyString15(Distance,Length);
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return;
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}
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}
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}
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else
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if (NumHuf++ >= 16 && FlagsCnt==0)
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StMode=1;
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AvrPlc += BytePlace;
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AvrPlc -= AvrPlc >> 8;
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Nhfb+=16;
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if (Nhfb > 0xff)
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{
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Nhfb=0x90;
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Nlzb >>= 1;
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}
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Window[UnpPtr++]=(byte)(ChSet[BytePlace]>>8);
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--DestUnpSize;
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while (1)
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{
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CurByte=ChSet[BytePlace];
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NewBytePlace=NToPl[CurByte++ & 0xff]++;
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if ((CurByte & 0xff) > 0xa1)
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CorrHuff(ChSet,NToPl);
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else
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break;
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}
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ChSet[BytePlace]=ChSet[NewBytePlace];
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ChSet[NewBytePlace]=CurByte;
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}
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void Unpack::GetFlagsBuf()
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{
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unsigned int Flags,NewFlagsPlace;
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unsigned int FlagsPlace=DecodeNum(Inp.fgetbits(),STARTHF2,DecHf2,PosHf2);
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// Our Huffman table stores 257 items and needs all them in other parts
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// of code such as when StMode is on, so the first item is control item.
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// While normally we do not use the last item to code the flags byte here,
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// we need to check for value 256 when unpacking in case we unpack
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// a corrupt archive.
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if (FlagsPlace>=sizeof(ChSetC)/sizeof(ChSetC[0]))
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return;
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while (1)
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{
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Flags=ChSetC[FlagsPlace];
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FlagBuf=Flags>>8;
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NewFlagsPlace=NToPlC[Flags++ & 0xff]++;
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if ((Flags & 0xff) != 0)
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break;
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CorrHuff(ChSetC,NToPlC);
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}
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ChSetC[FlagsPlace]=ChSetC[NewFlagsPlace];
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ChSetC[NewFlagsPlace]=Flags;
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}
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void Unpack::UnpInitData15(int Solid)
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{
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if (!Solid)
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{
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AvrPlcB=AvrLn1=AvrLn2=AvrLn3=NumHuf=Buf60=0;
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AvrPlc=0x3500;
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MaxDist3=0x2001;
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Nhfb=Nlzb=0x80;
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}
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FlagsCnt=0;
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FlagBuf=0;
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StMode=0;
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LCount=0;
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ReadTop=0;
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}
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void Unpack::InitHuff()
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{
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for (unsigned int I=0;I<256;I++)
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{
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ChSet[I]=ChSetB[I]=I<<8;
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ChSetA[I]=I;
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ChSetC[I]=((~I+1) & 0xff)<<8;
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}
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memset(NToPl,0,sizeof(NToPl));
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memset(NToPlB,0,sizeof(NToPlB));
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memset(NToPlC,0,sizeof(NToPlC));
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CorrHuff(ChSetB,NToPlB);
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}
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void Unpack::CorrHuff(ushort *CharSet,byte *NumToPlace)
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{
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int I,J;
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for (I=7;I>=0;I--)
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for (J=0;J<32;J++,CharSet++)
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*CharSet=(*CharSet & ~0xff) | I;
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memset(NumToPlace,0,sizeof(NToPl));
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for (I=6;I>=0;I--)
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NumToPlace[I]=(7-I)*32;
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}
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void Unpack::CopyString15(uint Distance,uint Length)
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{
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DestUnpSize-=Length;
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while (Length--)
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{
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Window[UnpPtr]=Window[(UnpPtr-Distance) & MaxWinMask];
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UnpPtr=(UnpPtr+1) & MaxWinMask;
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}
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}
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uint Unpack::DecodeNum(uint Num,uint StartPos,uint *DecTab,uint *PosTab)
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{
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int I;
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for (Num&=0xfff0,I=0;DecTab[I]<=Num;I++)
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StartPos++;
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Inp.faddbits(StartPos);
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return(((Num-(I ? DecTab[I-1]:0))>>(16-StartPos))+PosTab[StartPos]);
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}
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