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#include "rar.hpp"
#ifndef SFX_MODULE
extern uint CRCTab[256];
#endif
#define NROUNDS 32
#define rol(x,n,xsize) (((x)<<(n)) | ((x)>>(xsize-(n))))
#define ror(x,n,xsize) (((x)>>(n)) | ((x)<<(xsize-(n))))
#define substLong(t) ( (uint)SubstTable[(uint)t&255] | \
((uint)SubstTable[(int)(t>> 8)&255]<< 8) | \
((uint)SubstTable[(int)(t>>16)&255]<<16) | \
((uint)SubstTable[(int)(t>>24)&255]<<24) )
CryptKeyCacheItem CryptData::Cache[4];
int CryptData::CachePos=0;
#ifndef SFX_MODULE
static byte InitSubstTable[256]={
215, 19,149, 35, 73,197,192,205,249, 28, 16,119, 48,221, 2, 42,
232, 1,177,233, 14, 88,219, 25,223,195,244, 90, 87,239,153,137,
255,199,147, 70, 92, 66,246, 13,216, 40, 62, 29,217,230, 86, 6,
71, 24,171,196,101,113,218,123, 93, 91,163,178,202, 67, 44,235,
107,250, 75,234, 49,167,125,211, 83,114,157,144, 32,193,143, 36,
158,124,247,187, 89,214,141, 47,121,228, 61,130,213,194,174,251,
97,110, 54,229,115, 57,152, 94,105,243,212, 55,209,245, 63, 11,
164,200, 31,156, 81,176,227, 21, 76, 99,139,188,127, 17,248, 51,
207,120,189,210, 8,226, 41, 72,183,203,135,165,166, 60, 98, 7,
122, 38,155,170, 69,172,252,238, 39,134, 59,128,236, 27,240, 80,
131, 3, 85,206,145, 79,154,142,159,220,201,133, 74, 64, 20,129,
224,185,138,103,173,182, 43, 34,254, 82,198,151,231,180, 58, 10,
118, 26,102, 12, 50,132, 22,191,136,111,162,179, 45, 4,148,108,
161, 56, 78,126,242,222, 15,175,146, 23, 33,241,181,190, 77,225,
0, 46,169,186, 68, 95,237, 65, 53,208,253,168, 9, 18,100, 52,
116,184,160, 96,109, 37, 30,106,140,104,150, 5,204,117,112, 84
};
#endif
void CryptData::DecryptBlock(byte *Buf,size_t Size)
{
rin.blockDecrypt(Buf,Size,Buf);
}
#ifndef SFX_MODULE
void CryptData::EncryptBlock20(byte *Buf)
{
uint A,B,C,D,T,TA,TB;
#if defined(BIG_ENDIAN) || !defined(PRESENT_INT32) || !defined(ALLOW_NOT_ALIGNED_INT)
A=((uint)Buf[0]|((uint)Buf[1]<<8)|((uint)Buf[2]<<16)|((uint)Buf[3]<<24))^Key[0];
B=((uint)Buf[4]|((uint)Buf[5]<<8)|((uint)Buf[6]<<16)|((uint)Buf[7]<<24))^Key[1];
C=((uint)Buf[8]|((uint)Buf[9]<<8)|((uint)Buf[10]<<16)|((uint)Buf[11]<<24))^Key[2];
D=((uint)Buf[12]|((uint)Buf[13]<<8)|((uint)Buf[14]<<16)|((uint)Buf[15]<<24))^Key[3];
#else
uint32 *BufPtr=(uint32 *)Buf;
A=BufPtr[0]^Key[0];
B=BufPtr[1]^Key[1];
C=BufPtr[2]^Key[2];
D=BufPtr[3]^Key[3];
#endif
for(int I=0;I<NROUNDS;I++)
{
T=((C+rol(D,11,32))^Key[I&3]);
TA=A^substLong(T);
T=((D^rol(C,17,32))+Key[I&3]);
TB=B^substLong(T);
A=C;
B=D;
C=TA;
D=TB;
}
#if defined(BIG_ENDIAN) || !defined(PRESENT_INT32) || !defined(ALLOW_NOT_ALIGNED_INT)
C^=Key[0];
Buf[0]=(byte)C;
Buf[1]=(byte)(C>>8);
Buf[2]=(byte)(C>>16);
Buf[3]=(byte)(C>>24);
D^=Key[1];
Buf[4]=(byte)D;
Buf[5]=(byte)(D>>8);
Buf[6]=(byte)(D>>16);
Buf[7]=(byte)(D>>24);
A^=Key[2];
Buf[8]=(byte)A;
Buf[9]=(byte)(A>>8);
Buf[10]=(byte)(A>>16);
Buf[11]=(byte)(A>>24);
B^=Key[3];
Buf[12]=(byte)B;
Buf[13]=(byte)(B>>8);
Buf[14]=(byte)(B>>16);
Buf[15]=(byte)(B>>24);
#else
BufPtr[0]=C^Key[0];
BufPtr[1]=D^Key[1];
BufPtr[2]=A^Key[2];
BufPtr[3]=B^Key[3];
#endif
UpdKeys(Buf);
}
void CryptData::DecryptBlock20(byte *Buf)
{
byte InBuf[16];
uint A,B,C,D,T,TA,TB;
#if defined(BIG_ENDIAN) || !defined(PRESENT_INT32) || !defined(ALLOW_NOT_ALIGNED_INT)
A=((uint)Buf[0]|((uint)Buf[1]<<8)|((uint)Buf[2]<<16)|((uint)Buf[3]<<24))^Key[0];
B=((uint)Buf[4]|((uint)Buf[5]<<8)|((uint)Buf[6]<<16)|((uint)Buf[7]<<24))^Key[1];
C=((uint)Buf[8]|((uint)Buf[9]<<8)|((uint)Buf[10]<<16)|((uint)Buf[11]<<24))^Key[2];
D=((uint)Buf[12]|((uint)Buf[13]<<8)|((uint)Buf[14]<<16)|((uint)Buf[15]<<24))^Key[3];
#else
uint32 *BufPtr=(uint32 *)Buf;
A=BufPtr[0]^Key[0];
B=BufPtr[1]^Key[1];
C=BufPtr[2]^Key[2];
D=BufPtr[3]^Key[3];
#endif
memcpy(InBuf,Buf,sizeof(InBuf));
for(int I=NROUNDS-1;I>=0;I--)
{
T=((C+rol(D,11,32))^Key[I&3]);
TA=A^substLong(T);
T=((D^rol(C,17,32))+Key[I&3]);
TB=B^substLong(T);
A=C;
B=D;
C=TA;
D=TB;
}
#if defined(BIG_ENDIAN) || !defined(PRESENT_INT32) || !defined(ALLOW_NOT_ALIGNED_INT)
C^=Key[0];
Buf[0]=(byte)C;
Buf[1]=(byte)(C>>8);
Buf[2]=(byte)(C>>16);
Buf[3]=(byte)(C>>24);
D^=Key[1];
Buf[4]=(byte)D;
Buf[5]=(byte)(D>>8);
Buf[6]=(byte)(D>>16);
Buf[7]=(byte)(D>>24);
A^=Key[2];
Buf[8]=(byte)A;
Buf[9]=(byte)(A>>8);
Buf[10]=(byte)(A>>16);
Buf[11]=(byte)(A>>24);
B^=Key[3];
Buf[12]=(byte)B;
Buf[13]=(byte)(B>>8);
Buf[14]=(byte)(B>>16);
Buf[15]=(byte)(B>>24);
#else
BufPtr[0]=C^Key[0];
BufPtr[1]=D^Key[1];
BufPtr[2]=A^Key[2];
BufPtr[3]=B^Key[3];
#endif
UpdKeys(InBuf);
}
void CryptData::UpdKeys(byte *Buf)
{
for (int I=0;I<16;I+=4)
{
Key[0]^=CRCTab[Buf[I]];
Key[1]^=CRCTab[Buf[I+1]];
Key[2]^=CRCTab[Buf[I+2]];
Key[3]^=CRCTab[Buf[I+3]];
}
}
void CryptData::Swap(byte *Ch1,byte *Ch2)
{
byte Ch=*Ch1;
*Ch1=*Ch2;
*Ch2=Ch;
}
#endif
void CryptData::SetCryptKeys(SecPassword *Password,const byte *Salt,bool Encrypt,bool OldOnly,bool HandsOffHash)
{
if (!Password->IsSet())
return;
wchar PlainPsw[MAXPASSWORD];
Password->Get(PlainPsw,ASIZE(PlainPsw));
if (OldOnly)
{
#ifndef SFX_MODULE
if (CRCTab[1]==0)
InitCRC();
char Psw[MAXPASSWORD];
memset(Psw,0,sizeof(Psw));
// We need to use ASCII password for older encryption algorithms.
WideToChar(PlainPsw,Psw,ASIZE(Psw));
Psw[ASIZE(Psw)-1]=0;
size_t PswLength=strlen(Psw);
SetOldKeys(Psw);
Key[0]=0xD3A3B879L;
Key[1]=0x3F6D12F7L;
Key[2]=0x7515A235L;
Key[3]=0xA4E7F123L;
memcpy(SubstTable,InitSubstTable,sizeof(SubstTable));
for (int J=0;J<256;J++)
for (size_t I=0;I<PswLength;I+=2)
{
uint N1=(byte)CRCTab [ (byte(Psw[I]) - J) &0xff];
uint N2=(byte)CRCTab [ (byte(Psw[I+1]) + J) &0xff];
for (int K=1;N1!=N2;N1=(N1+1)&0xff,K++)
Swap(&SubstTable[N1],&SubstTable[(N1+I+K)&0xff]);
}
for (size_t I=0;I<PswLength;I+=16)
EncryptBlock20((byte *)&Psw[I]);
cleandata(Psw,sizeof(Psw));
#endif
cleandata(PlainPsw,sizeof(PlainPsw));
return;
}
bool Cached=false;
for (uint I=0;I<ASIZE(Cache);I++)
if (Cache[I].Password==*Password &&
(Salt==NULL && !Cache[I].SaltPresent || Salt!=NULL &&
Cache[I].SaltPresent && memcmp(Cache[I].Salt,Salt,SALT_SIZE)==0) &&
Cache[I].HandsOffHash==HandsOffHash)
{
memcpy(AESKey,Cache[I].AESKey,sizeof(AESKey));
memcpy(AESInit,Cache[I].AESInit,sizeof(AESInit));
Cached=true;
break;
}
if (!Cached)
{
byte RawPsw[2*MAXPASSWORD+SALT_SIZE];
WideToRaw(PlainPsw,RawPsw);
size_t RawLength=2*wcslen(PlainPsw);
if (Salt!=NULL)
{
memcpy(RawPsw+RawLength,Salt,SALT_SIZE);
RawLength+=SALT_SIZE;
}
hash_context c;
hash_initial(&c);
const int HashRounds=0x40000;
for (int I=0;I<HashRounds;I++)
{
hash_process( &c, RawPsw, RawLength, HandsOffHash);
byte PswNum[3];
PswNum[0]=(byte)I;
PswNum[1]=(byte)(I>>8);
PswNum[2]=(byte)(I>>16);
hash_process( &c, PswNum, 3, HandsOffHash);
if (I%(HashRounds/16)==0)
{
hash_context tempc=c;
uint32 digest[5];
hash_final( &tempc, digest, HandsOffHash);
AESInit[I/(HashRounds/16)]=(byte)digest[4];
}
}
uint32 digest[5];
hash_final( &c, digest, HandsOffHash);
for (int I=0;I<4;I++)
for (int J=0;J<4;J++)
AESKey[I*4+J]=(byte)(digest[I]>>(J*8));
Cache[CachePos].Password=*Password;
if ((Cache[CachePos].SaltPresent=(Salt!=NULL))==true)
memcpy(Cache[CachePos].Salt,Salt,SALT_SIZE);
Cache[CachePos].HandsOffHash=HandsOffHash;
memcpy(Cache[CachePos].AESKey,AESKey,sizeof(AESKey));
memcpy(Cache[CachePos].AESInit,AESInit,sizeof(AESInit));
CachePos=(CachePos+1)%ASIZE(Cache);
cleandata(RawPsw,sizeof(RawPsw));
}
rin.init(Encrypt ? Rijndael::Encrypt : Rijndael::Decrypt,AESKey,AESInit);
cleandata(PlainPsw,sizeof(PlainPsw));
}
#ifndef SFX_MODULE
void CryptData::SetOldKeys(const char *Password)
{
uint PswCRC=CRC(0xffffffff,Password,strlen(Password));
OldKey[0]=PswCRC&0xffff;
OldKey[1]=(PswCRC>>16)&0xffff;
OldKey[2]=OldKey[3]=0;
PN1=PN2=PN3=0;
byte Ch;
while ((Ch=*Password)!=0)
{
PN1+=Ch;
PN2^=Ch;
PN3+=Ch;
PN3=(byte)rol(PN3,1,8);
OldKey[2]^=Ch^CRCTab[Ch];
OldKey[3]+=Ch+(CRCTab[Ch]>>16);
Password++;
}
}
void CryptData::SetAV15Encryption()
{
OldKey[0]=0x4765;
OldKey[1]=0x9021;
OldKey[2]=0x7382;
OldKey[3]=0x5215;
}
void CryptData::SetCmt13Encryption()
{
PN1=0;
PN2=7;
PN3=77;
}
void CryptData::Crypt(byte *Data,uint Count,int Method)
{
if (Method==OLD_DECODE)
Decode13(Data,Count);
else
if (Method==OLD_ENCODE)
Encode13(Data,Count);
else
Crypt15(Data,Count);
}
void CryptData::Encode13(byte *Data,uint Count)
{
while (Count--)
{
PN2+=PN3;
PN1+=PN2;
*Data+=PN1;
Data++;
}
}
void CryptData::Decode13(byte *Data,uint Count)
{
while (Count--)
{
PN2+=PN3;
PN1+=PN2;
*Data-=PN1;
Data++;
}
}
void CryptData::Crypt15(byte *Data,uint Count)
{
while (Count--)
{
OldKey[0]+=0x1234;
OldKey[1]^=CRCTab[(OldKey[0] & 0x1fe)>>1];
OldKey[2]-=CRCTab[(OldKey[0] & 0x1fe)>>1]>>16;
OldKey[0]^=OldKey[2];
OldKey[3]=ror(OldKey[3]&0xffff,1,16)^OldKey[1];
OldKey[3]=ror(OldKey[3]&0xffff,1,16);
OldKey[0]^=OldKey[3];
*Data^=(byte)(OldKey[0]>>8);
Data++;
}
}
#endif
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