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-rw-r--r--unrar/unrar/crypt.cpp381
1 files changed, 381 insertions, 0 deletions
diff --git a/unrar/unrar/crypt.cpp b/unrar/unrar/crypt.cpp
new file mode 100644
index 0000000..04a1d70
--- /dev/null
+++ b/unrar/unrar/crypt.cpp
@@ -0,0 +1,381 @@
+#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,int 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(char *Password,byte *Salt,bool Encrypt,bool OldOnly,bool HandsOffHash)
+{
+ if (*Password==0)
+ return;
+ if (OldOnly)
+ {
+#ifndef SFX_MODULE
+ if (CRCTab[1]==0)
+ InitCRC();
+ byte Psw[MAXPASSWORD];
+ SetOldKeys(Password);
+ Key[0]=0xD3A3B879L;
+ Key[1]=0x3F6D12F7L;
+ Key[2]=0x7515A235L;
+ Key[3]=0xA4E7F123L;
+ memset(Psw,0,sizeof(Psw));
+#if defined(_WIN_32) && !defined(GUI)
+ CharToOemBuff(Password,(char*)Psw,strlen(Password));
+#else
+ strncpyz((char *)Psw,Password,ASIZE(Psw));
+#endif
+ int PswLength=strlen(Password);
+ memcpy(SubstTable,InitSubstTable,sizeof(SubstTable));
+ for (int J=0;J<256;J++)
+ for (int I=0;I<PswLength;I+=2)
+ {
+ uint N1=(byte)CRCTab[(Psw[I]-J)&0xff];
+ uint N2=(byte)CRCTab[(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 (int I=0;I<PswLength;I+=16)
+ EncryptBlock20(&Psw[I]);
+#endif
+ return;
+ }
+
+ bool Cached=false;
+ for (int I=0;I<sizeof(Cache)/sizeof(Cache[0]);I++)
+ if (strcmp(Cache[I].Password,Password)==0 &&
+ (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)
+ {
+ wchar PswW[MAXPASSWORD];
+ CharToWide(Password,PswW,MAXPASSWORD-1);
+ PswW[MAXPASSWORD-1]=0;
+ byte RawPsw[2*MAXPASSWORD+SALT_SIZE];
+ WideToRaw(PswW,RawPsw);
+ int RawLength=2*strlenw(PswW);
+ 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));
+
+ strcpy(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)%(sizeof(Cache)/sizeof(Cache[0]));
+ }
+ rin.init(Encrypt ? Rijndael::Encrypt : Rijndael::Decrypt,AESKey,AESInit);
+}
+
+
+#ifndef SFX_MODULE
+void CryptData::SetOldKeys(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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