blowfishcbc.cs

source for advanced algorithm

            uint pbox17 = pbox[17];

            uint hi = this.ivHi;
            uint lo = this.ivLo;

            count &= ~(BLOCK_SIZE - 1);

            end = posIn + count;

            while (posIn < end)
            {
                hi ^= (((uint)dataIn[posIn    ]) << 24) |
                      (((uint)dataIn[posIn + 1]) << 16) |
                      (((uint)dataIn[posIn + 2]) <<  8) |
                              dataIn[posIn + 3];
 
                lo ^= (((uint)dataIn[posIn + 4]) << 24) |
                      (((uint)dataIn[posIn + 5]) << 16) |
                      (((uint)dataIn[posIn + 6]) <<  8) |
                              dataIn[posIn + 7];

                posIn += 8; 

                hi ^= pbox00;
                lo ^= (((sbox1[(int)(hi >> 24)] + sbox2[(int)((hi >> 16) & 0x0ff)]) ^ sbox3[(int)((hi >> 8) & 0x0ff)]) + sbox4[(int)(hi & 0x0ff)]) ^ pbox01;
                hi ^= (((sbox1[(int)(lo >> 24)] + sbox2[(int)((lo >> 16) & 0x0ff)]) ^ sbox3[(int)((lo >> 8) & 0x0ff)]) + sbox4[(int)(lo & 0x0ff)]) ^ pbox02;
                lo ^= (((sbox1[(int)(hi >> 24)] + sbox2[(int)((hi >> 16) & 0x0ff)]) ^ sbox3[(int)((hi >> 8) & 0x0ff)]) + sbox4[(int)(hi & 0x0ff)]) ^ pbox03;
                hi ^= (((sbox1[(int)(lo >> 24)] + sbox2[(int)((lo >> 16) & 0x0ff)]) ^ sbox3[(int)((lo >> 8) & 0x0ff)]) + sbox4[(int)(lo & 0x0ff)]) ^ pbox04;
                lo ^= (((sbox1[(int)(hi >> 24)] + sbox2[(int)((hi >> 16) & 0x0ff)]) ^ sbox3[(int)((hi >> 8) & 0x0ff)]) + sbox4[(int)(hi & 0x0ff)]) ^ pbox05;
                hi ^= (((sbox1[(int)(lo >> 24)] + sbox2[(int)((lo >> 16) & 0x0ff)]) ^ sbox3[(int)((lo >> 8) & 0x0ff)]) + sbox4[(int)(lo & 0x0ff)]) ^ pbox06;
                lo ^= (((sbox1[(int)(hi >> 24)] + sbox2[(int)((hi >> 16) & 0x0ff)]) ^ sbox3[(int)((hi >> 8) & 0x0ff)]) + sbox4[(int)(hi & 0x0ff)]) ^ pbox07;
                hi ^= (((sbox1[(int)(lo >> 24)] + sbox2[(int)((lo >> 16) & 0x0ff)]) ^ sbox3[(int)((lo >> 8) & 0x0ff)]) + sbox4[(int)(lo & 0x0ff)]) ^ pbox08;
                lo ^= (((sbox1[(int)(hi >> 24)] + sbox2[(int)((hi >> 16) & 0x0ff)]) ^ sbox3[(int)((hi >> 8) & 0x0ff)]) + sbox4[(int)(hi & 0x0ff)]) ^ pbox09;
                hi ^= (((sbox1[(int)(lo >> 24)] + sbox2[(int)((lo >> 16) & 0x0ff)]) ^ sbox3[(int)((lo >> 8) & 0x0ff)]) + sbox4[(int)(lo & 0x0ff)]) ^ pbox10;
                lo ^= (((sbox1[(int)(hi >> 24)] + sbox2[(int)((hi >> 16) & 0x0ff)]) ^ sbox3[(int)((hi >> 8) & 0x0ff)]) + sbox4[(int)(hi & 0x0ff)]) ^ pbox11;
                hi ^= (((sbox1[(int)(lo >> 24)] + sbox2[(int)((lo >> 16) & 0x0ff)]) ^ sbox3[(int)((lo >> 8) & 0x0ff)]) + sbox4[(int)(lo & 0x0ff)]) ^ pbox12;
                lo ^= (((sbox1[(int)(hi >> 24)] + sbox2[(int)((hi >> 16) & 0x0ff)]) ^ sbox3[(int)((hi >> 8) & 0x0ff)]) + sbox4[(int)(hi & 0x0ff)]) ^ pbox13;
                hi ^= (((sbox1[(int)(lo >> 24)] + sbox2[(int)((lo >> 16) & 0x0ff)]) ^ sbox3[(int)((lo >> 8) & 0x0ff)]) + sbox4[(int)(lo & 0x0ff)]) ^ pbox14;
                lo ^= (((sbox1[(int)(hi >> 24)] + sbox2[(int)((hi >> 16) & 0x0ff)]) ^ sbox3[(int)((hi >> 8) & 0x0ff)]) + sbox4[(int)(hi & 0x0ff)]) ^ pbox15;
                hi ^= (((sbox1[(int)(lo >> 24)] + sbox2[(int)((lo >> 16) & 0x0ff)]) ^ sbox3[(int)((lo >> 8) & 0x0ff)]) + sbox4[(int)(lo & 0x0ff)]) ^ pbox16;

                uint swap = lo ^ pbox17;
                lo = hi;
                hi = swap;
                
                dataOut[posOut    ] = (byte)(hi >> 24);
                dataOut[posOut + 1] = (byte)(hi >> 16);
                dataOut[posOut + 2] = (byte)(hi >>  8);
                dataOut[posOut + 3] = (byte) hi;
                
                dataOut[posOut + 4] = (byte)(lo >> 24);
                dataOut[posOut + 5] = (byte)(lo >> 16);
                dataOut[posOut + 6] = (byte)(lo >>  8);
                dataOut[posOut + 7] = (byte) lo;

                posOut += 8;
            }

            this.ivHi = hi;
            this.ivLo = lo;

            return count;
        }

        /// <see cref="BlowfishNET.BlowfishECB.Decrypt"/>
        public new int Decrypt(
            byte[] dataIn,
            int posIn,
            byte[] dataOut,
            int posOut,
            int count) 
        {
            int end;
            uint hi, lo, hiBak, loBak;
            
            uint[] sbox1 = this.sbox1;
            uint[] sbox2 = this.sbox2;
            uint[] sbox3 = this.sbox3;
            uint[] sbox4 = this.sbox4;

            uint[] pbox = this.pbox;

            uint pbox00 = pbox[ 0];
            uint pbox01 = pbox[ 1];
            uint pbox02 = pbox[ 2];
            uint pbox03 = pbox[ 3];
            uint pbox04 = pbox[ 4];
            uint pbox05 = pbox[ 5];
            uint pbox06 = pbox[ 6];
            uint pbox07 = pbox[ 7];
            uint pbox08 = pbox[ 8];
            uint pbox09 = pbox[ 9];
            uint pbox10 = pbox[10];
            uint pbox11 = pbox[11];
            uint pbox12 = pbox[12];
            uint pbox13 = pbox[13];
            uint pbox14 = pbox[14];
            uint pbox15 = pbox[15];
            uint pbox16 = pbox[16];
            uint pbox17 = pbox[17];

            uint ivHi = this.ivHi;
            uint ivLo = this.ivLo;         

            count &= ~(BLOCK_SIZE - 1);

            end = posIn + count;

            while (posIn < end)
            {
                hi = hiBak = (((uint)dataIn[posIn    ]) << 24) |
                                 (((uint)dataIn[posIn + 1]) << 16) |
                                 (((uint)dataIn[posIn + 2]) <<  8) |
                                         dataIn[posIn + 3];
 
                lo = loBak = (((uint)dataIn[posIn + 4]) << 24) |
                                 (((uint)dataIn[posIn + 5]) << 16) |
                                 (((uint)dataIn[posIn + 6]) <<  8) |
                                         dataIn[posIn + 7];
                posIn += 8; 

                hi ^= pbox17;
                lo ^= (((sbox1[(int)(hi >> 24)] + sbox2[(int)((hi >> 16) & 0x0ff)]) ^ sbox3[(int)((hi >> 8) & 0x0ff)]) + sbox4[(int)(hi & 0x0ff)]) ^ pbox16;
                hi ^= (((sbox1[(int)(lo >> 24)] + sbox2[(int)((lo >> 16) & 0x0ff)]) ^ sbox3[(int)((lo >> 8) & 0x0ff)]) + sbox4[(int)(lo & 0x0ff)]) ^ pbox15;
                lo ^= (((sbox1[(int)(hi >> 24)] + sbox2[(int)((hi >> 16) & 0x0ff)]) ^ sbox3[(int)((hi >> 8) & 0x0ff)]) + sbox4[(int)(hi & 0x0ff)]) ^ pbox14;
                hi ^= (((sbox1[(int)(lo >> 24)] + sbox2[(int)((lo >> 16) & 0x0ff)]) ^ sbox3[(int)((lo >> 8) & 0x0ff)]) + sbox4[(int)(lo & 0x0ff)]) ^ pbox13;
                lo ^= (((sbox1[(int)(hi >> 24)] + sbox2[(int)((hi >> 16) & 0x0ff)]) ^ sbox3[(int)((hi >> 8) & 0x0ff)]) + sbox4[(int)(hi & 0x0ff)]) ^ pbox12;
                hi ^= (((sbox1[(int)(lo >> 24)] + sbox2[(int)((lo >> 16) & 0x0ff)]) ^ sbox3[(int)((lo >> 8) & 0x0ff)]) + sbox4[(int)(lo & 0x0ff)]) ^ pbox11;
                lo ^= (((sbox1[(int)(hi >> 24)] + sbox2[(int)((hi >> 16) & 0x0ff)]) ^ sbox3[(int)((hi >> 8) & 0x0ff)]) + sbox4[(int)(hi & 0x0ff)]) ^ pbox10;
                hi ^= (((sbox1[(int)(lo >> 24)] + sbox2[(int)((lo >> 16) & 0x0ff)]) ^ sbox3[(int)((lo >> 8) & 0x0ff)]) + sbox4[(int)(lo & 0x0ff)]) ^ pbox09;
                lo ^= (((sbox1[(int)(hi >> 24)] + sbox2[(int)((hi >> 16) & 0x0ff)]) ^ sbox3[(int)((hi >> 8) & 0x0ff)]) + sbox4[(int)(hi & 0x0ff)]) ^ pbox08;
                hi ^= (((sbox1[(int)(lo >> 24)] + sbox2[(int)((lo >> 16) & 0x0ff)]) ^ sbox3[(int)((lo >> 8) & 0x0ff)]) + sbox4[(int)(lo & 0x0ff)]) ^ pbox07;
                lo ^= (((sbox1[(int)(hi >> 24)] + sbox2[(int)((hi >> 16) & 0x0ff)]) ^ sbox3[(int)((hi >> 8) & 0x0ff)]) + sbox4[(int)(hi & 0x0ff)]) ^ pbox06;
                hi ^= (((sbox1[(int)(lo >> 24)] + sbox2[(int)((lo >> 16) & 0x0ff)]) ^ sbox3[(int)((lo >> 8) & 0x0ff)]) + sbox4[(int)(lo & 0x0ff)]) ^ pbox05;
                lo ^= (((sbox1[(int)(hi >> 24)] + sbox2[(int)((hi >> 16) & 0x0ff)]) ^ sbox3[(int)((hi >> 8) & 0x0ff)]) + sbox4[(int)(hi & 0x0ff)]) ^ pbox04;
                hi ^= (((sbox1[(int)(lo >> 24)] + sbox2[(int)((lo >> 16) & 0x0ff)]) ^ sbox3[(int)((lo >> 8) & 0x0ff)]) + sbox4[(int)(lo & 0x0ff)]) ^ pbox03;
                lo ^= (((sbox1[(int)(hi >> 24)] + sbox2[(int)((hi >> 16) & 0x0ff)]) ^ sbox3[(int)((hi >> 8) & 0x0ff)]) + sbox4[(int)(hi & 0x0ff)]) ^ pbox02;
                hi ^= (((sbox1[(int)(lo >> 24)] + sbox2[(int)((lo >> 16) & 0x0ff)]) ^ sbox3[(int)((lo >> 8) & 0x0ff)]) + sbox4[(int)(lo & 0x0ff)]) ^ pbox01;

                lo ^= ivHi ^ pbox00;
                hi ^= ivLo;

                dataOut[posOut    ] = (byte)(lo >> 24);
                dataOut[posOut + 1] = (byte)(lo >> 16);
                dataOut[posOut + 2] = (byte)(lo >>  8);
                dataOut[posOut + 3] = (byte) lo;
                
                dataOut[posOut + 4] = (byte)(hi >> 24);
                dataOut[posOut + 5] = (byte)(hi >> 16);
                dataOut[posOut + 6] = (byte)(hi >>  8);
                dataOut[posOut + 7] = (byte) hi;

                ivHi = hiBak;
                ivLo = loBak;

                posOut += 8;
            }

            this.ivHi = ivHi;
            this.ivLo = ivLo;

            return count;
        }

        /// <see cref="BlowfishNET.BlowfishECB.Clone"/>
        public new object Clone()
        {
            BlowfishCBC result;

            result = new BlowfishCBC();

            result.pbox = (uint[]) this.pbox.Clone();
            
            result.sbox1 = (uint[]) this.sbox1.Clone();
            result.sbox2 = (uint[]) this.sbox2.Clone();
            result.sbox3 = (uint[]) this.sbox3.Clone();
            result.sbox4 = (uint[]) this.sbox4.Clone();

            result.block = (byte[]) this.block.Clone();

            result.isWeakKey = this.isWeakKey;
        
            result.ivHi = this.ivHi;    
            result.ivLo = this.ivLo;    

            return result;
        }
    }
}