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80 lines
1.4 KiB
C++
80 lines
1.4 KiB
C++
extern uint CRCTab[256];
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void CryptData::SetKey13(const char *Password)
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{
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Key13[0]=Key13[1]=Key13[2]=0;
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for (size_t I=0;Password[I]!=0;I++)
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{
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byte P=Password[I];
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Key13[0]+=P;
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Key13[1]^=P;
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Key13[2]+=P;
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Key13[2]=(byte)rotls(Key13[2],1,8);
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}
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}
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void CryptData::SetKey15(const char *Password)
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{
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InitCRC32(CRCTab);
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uint PswCRC=CRC32(0xffffffff,Password,strlen(Password));
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Key15[0]=PswCRC&0xffff;
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Key15[1]=(PswCRC>>16)&0xffff;
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Key15[2]=Key15[3]=0;
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for (size_t I=0;Password[I]!=0;I++)
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{
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byte P=Password[I];
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Key15[2]^=P^CRCTab[P];
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Key15[3]+=P+(CRCTab[P]>>16);
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}
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}
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void CryptData::SetAV15Encryption()
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{
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InitCRC32(CRCTab);
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Method=CRYPT_RAR15;
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Key15[0]=0x4765;
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Key15[1]=0x9021;
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Key15[2]=0x7382;
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Key15[3]=0x5215;
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}
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void CryptData::SetCmt13Encryption()
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{
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Method=CRYPT_RAR13;
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Key13[0]=0;
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Key13[1]=7;
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Key13[2]=77;
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}
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void CryptData::Decrypt13(byte *Data,size_t Count)
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{
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while (Count--)
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{
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Key13[1]+=Key13[2];
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Key13[0]+=Key13[1];
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*Data-=Key13[0];
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Data++;
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}
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}
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void CryptData::Crypt15(byte *Data,size_t Count)
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{
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while (Count--)
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{
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Key15[0]+=0x1234;
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Key15[1]^=CRCTab[(Key15[0] & 0x1fe)>>1];
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Key15[2]-=CRCTab[(Key15[0] & 0x1fe)>>1]>>16;
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Key15[0]^=Key15[2];
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Key15[3]=rotrs(Key15[3]&0xffff,1,16)^Key15[1];
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Key15[3]=rotrs(Key15[3]&0xffff,1,16);
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Key15[0]^=Key15[3];
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*Data^=(byte)(Key15[0]>>8);
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Data++;
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}
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}
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