Exemplo n.º 1
0
        /// <summary>
        /// Purpose: To encrypt a raw byte buffer using the specified mode.  The output is a raw byte buffer
        /// </summary>
        /// <param name="inBuffer"></param>
        /// <param name="iMode"></param>
        /// <returns></returns>
        public byte[] EncryptBuffer(byte[] inBuffer)
        {
            int inBufferSize = inBuffer.Length;
            if (inBufferSize == 0)
                return new byte[0];
            // Since this is a block cypher algorithm, we have to encrypt full blocks of data so we
            // have to create a new buffer that is an even block size
            byte pad = 0;
            if (inBufferSize % 8 != 0)
                pad = (byte)(8 - (inBufferSize % 8));
            else
                pad = 8;
            int internalBufferSize = inBufferSize + pad;
            byte[] internalBuffer = new byte[internalBufferSize];
            // Set the pad bytes to the appropriate value
            for (int i = inBufferSize; i < internalBufferSize; i++)
                internalBuffer[i] = pad;

            byte[] outBuffer = new byte[internalBufferSize];
            inBuffer.CopyTo(internalBuffer, 0);

            //Check the buffer's length - should be > 0 and multiple of 8
            if ((internalBufferSize != 0) && (internalBufferSize % 8 == 0))
            {
                switch (mode)
                {
                    case Mode.CBC:
                        BlowfishCBC bfCBC = new BlowfishCBC(key);
                        bfCBC.Encrypt(internalBuffer, 0, outBuffer, 0, internalBuffer.Length);
                        break;
                    case Mode.ECB:
                        BlowfishECB bfECB = new BlowfishECB(key);
                        bfECB.Encrypt(internalBuffer, 0, outBuffer, 0, internalBuffer.Length);
                        break;
                }
            }
            return outBuffer;
        }
Exemplo n.º 2
0
        //////////////////////////////////////////////////////////////////////
        /// <see cref="BlowfishECB.Clone"/>
        public new object Clone()
        {
            BlowfishCBC result;

            result = new BlowfishCBC();

            result.m_pbox = (uint[])this.m_pbox.Clone();

            result.m_sbox1 = (uint[])this.m_sbox1.Clone();
            result.m_sbox2 = (uint[])this.m_sbox2.Clone();
            result.m_sbox3 = (uint[])this.m_sbox3.Clone();
            result.m_sbox4 = (uint[])this.m_sbox4.Clone();

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

            result.m_nIsWeakKey = this.m_nIsWeakKey;

            result.m_ivHi = this.m_ivHi;
            result.m_ivLo = this.m_ivLo;

            return result;
        }
Exemplo n.º 3
0
 /// <summary>
 /// Purpose: To decrypt an encrypted buffer using the specified mode
 /// </summary>
 /// <param name="inBuffer"></param>
 /// <param name="iMode"></param>
 /// <returns></returns>
 public byte[] DecryptBuffer(byte[] inBuffer)
 {
     int internalBufferSize = inBuffer.Length;
     if (internalBufferSize % 8 != 0)
         internalBufferSize += (8 - (internalBufferSize % 8));
     byte[] internalBuffer = new byte[internalBufferSize];
     inBuffer.CopyTo(internalBuffer, 0);
     byte[] outBuffer = new byte[internalBufferSize];
     switch (mode)
     {
         case Mode.CBC:
             BlowfishCBC bfCBC = new BlowfishCBC(key);
             bfCBC.Decrypt(inBuffer, 0, outBuffer, 0, inBuffer.Length);
             break;
         case Mode.ECB:
             BlowfishECB bfECB = new BlowfishECB(key);
             bfECB.Decrypt(inBuffer, 0, outBuffer, 0, inBuffer.Length);
             break;
     }
     return outBuffer;
 }