public ProcessBlock ( byte input, int inOff, byte output, int outOff ) : int | ||
input | byte | |
inOff | int | |
output | byte | |
outOff | int | |
리턴 | int |
public virtual int DoFinal( byte[] outBytes, int outOff) { InitCipher(); int extra = bufOff; byte[] tmp = new byte[bufBlock.Length]; bufOff = 0; if (forEncryption) { Check.OutputLength(outBytes, outOff, extra + macSize, "Output buffer too short"); cipher.ProcessBlock(bufBlock, 0, tmp, 0); Array.Copy(tmp, 0, outBytes, outOff, extra); mac.BlockUpdate(tmp, 0, extra); CalculateMac(); Array.Copy(macBlock, 0, outBytes, outOff + extra, macSize); Reset(false); return(extra + macSize); } else { if (extra < macSize) { throw new InvalidCipherTextException("data too short"); } Check.OutputLength(outBytes, outOff, extra - macSize, "Output buffer too short"); if (extra > macSize) { mac.BlockUpdate(bufBlock, 0, extra - macSize); cipher.ProcessBlock(bufBlock, 0, tmp, 0); Array.Copy(tmp, 0, outBytes, outOff, extra - macSize); } CalculateMac(); if (!VerifyMac(bufBlock, extra - macSize)) { throw new InvalidCipherTextException("mac check in EAX failed"); } Reset(false); return(extra - macSize); } }
public virtual int DoFinal(byte[] outBytes, int outOff) { InitCipher(); int num = bufOff; byte[] array = new byte[bufBlock.Length]; bufOff = 0; if (forEncryption) { Check.OutputLength(outBytes, outOff, num + macSize, "Output buffer too short"); cipher.ProcessBlock(bufBlock, 0, array, 0); Array.Copy(array, 0, outBytes, outOff, num); mac.BlockUpdate(array, 0, num); CalculateMac(); Array.Copy(macBlock, 0, outBytes, outOff + num, macSize); Reset(clearMac: false); return(num + macSize); } if (num < macSize) { throw new InvalidCipherTextException("data too short"); } Check.OutputLength(outBytes, outOff, num - macSize, "Output buffer too short"); if (num > macSize) { mac.BlockUpdate(bufBlock, 0, num - macSize); cipher.ProcessBlock(bufBlock, 0, array, 0); Array.Copy(array, 0, outBytes, outOff, num - macSize); } CalculateMac(); if (!VerifyMac(bufBlock, num - macSize)) { throw new InvalidCipherTextException("mac check in EAX failed"); } Reset(clearMac: false); return(num - macSize); }
public virtual int DoFinal( byte[] outBytes, int outOff) { int extra = bufOff; byte[] tmp = new byte[bufBlock.Length]; bufOff = 0; if (forEncryption) { cipher.ProcessBlock(bufBlock, 0, tmp, 0); cipher.ProcessBlock(bufBlock, blockSize, tmp, blockSize); Array.Copy(tmp, 0, outBytes, outOff, extra); mac.BlockUpdate(tmp, 0, extra); calculateMac(); Array.Copy(macBlock, 0, outBytes, outOff + extra, macSize); Reset(false); return(extra + macSize); } else { if (extra > macSize) { mac.BlockUpdate(bufBlock, 0, extra - macSize); cipher.ProcessBlock(bufBlock, 0, tmp, 0); cipher.ProcessBlock(bufBlock, blockSize, tmp, blockSize); Array.Copy(tmp, 0, outBytes, outOff, extra - macSize); } calculateMac(); if (!verifyMac(bufBlock, extra - macSize)) { throw new InvalidCipherTextException("mac check in EAX failed"); } Reset(false); return(extra - macSize); } }
/** * Process a packet of data for either CCM decryption or encryption. * * @param in data for processing. * @param inOff offset at which data starts in the input array. * @param inLen length of the data in the input array. * @param output output array. * @param outOff offset into output array to start putting processed bytes. * @return the number of bytes added to output. * @throws IllegalStateException if the cipher is not appropriately set up. * @throws InvalidCipherTextException if the input data is truncated or the mac check fails. * @throws DataLengthException if output buffer too short. */ public virtual int ProcessPacket(byte[] input, int inOff, int inLen, byte[] output, int outOff) { // TODO: handle null keyParam (e.g. via RepeatedKeySpec) // Need to keep the CTR and CBC Mac parts around and reset if (keyParam == null) throw new InvalidOperationException("CCM cipher unitialized."); int n = nonce.Length; int q = 15 - n; if (q < 4) { int limitLen = 1 << (8 * q); if (inLen >= limitLen) throw new InvalidOperationException("CCM packet too large for choice of q."); } byte[] iv = new byte[BlockSize]; iv[0] = (byte)((q - 1) & 0x7); nonce.CopyTo(iv, 1); IBlockCipher ctrCipher = new SicBlockCipher(cipher); ctrCipher.Init(forEncryption, new ParametersWithIV(keyParam, iv)); int outputLen; int inIndex = inOff; int outIndex = outOff; if (forEncryption) { outputLen = inLen + macSize; Check.OutputLength(output, outOff, outputLen, "Output buffer too short."); calculateMac(input, inOff, inLen, macBlock); ctrCipher.ProcessBlock(macBlock, 0, macBlock, 0); // S0 while (inIndex < (inOff + inLen - BlockSize)) // S1... { ctrCipher.ProcessBlock(input, inIndex, output, outIndex); outIndex += BlockSize; inIndex += BlockSize; } byte[] block = new byte[BlockSize]; Array.Copy(input, inIndex, block, 0, inLen + inOff - inIndex); ctrCipher.ProcessBlock(block, 0, block, 0); Array.Copy(block, 0, output, outIndex, inLen + inOff - inIndex); Array.Copy(macBlock, 0, output, outOff + inLen, macSize); } else { if (inLen < macSize) throw new InvalidCipherTextException("data too short"); outputLen = inLen - macSize; Check.OutputLength(output, outOff, outputLen, "Output buffer too short."); Array.Copy(input, inOff + outputLen, macBlock, 0, macSize); ctrCipher.ProcessBlock(macBlock, 0, macBlock, 0); for (int i = macSize; i != macBlock.Length; i++) { macBlock[i] = 0; } while (inIndex < (inOff + outputLen - BlockSize)) { ctrCipher.ProcessBlock(input, inIndex, output, outIndex); outIndex += BlockSize; inIndex += BlockSize; } byte[] block = new byte[BlockSize]; Array.Copy(input, inIndex, block, 0, outputLen - (inIndex - inOff)); ctrCipher.ProcessBlock(block, 0, block, 0); Array.Copy(block, 0, output, outIndex, outputLen - (inIndex - inOff)); byte[] calculatedMacBlock = new byte[BlockSize]; calculateMac(output, outOff, outputLen, calculatedMacBlock); if (!Arrays.ConstantTimeAreEqual(macBlock, calculatedMacBlock)) throw new InvalidCipherTextException("mac check in CCM failed"); } return outputLen; }
/** * Process a packet of data for either CCM decryption or encryption. * * @param in data for processing. * @param inOff offset at which data starts in the input array. * @param inLen length of the data in the input array. * @param output output array. * @param outOff offset into output array to start putting processed bytes. * @return the number of bytes added to output. * @throws IllegalStateException if the cipher is not appropriately set up. * @throws InvalidCipherTextException if the input data is truncated or the mac check fails. * @throws DataLengthException if output buffer too short. */ public virtual int ProcessPacket(byte[] input, int inOff, int inLen, byte[] output, int outOff) { // TODO: handle null keyParam (e.g. via RepeatedKeySpec) // Need to keep the CTR and CBC Mac parts around and reset if (keyParam == null) { throw new InvalidOperationException("CCM cipher unitialized."); } int n = nonce.Length; int q = 15 - n; if (q < 4) { int limitLen = 1 << (8 * q); if (inLen >= limitLen) { throw new InvalidOperationException("CCM packet too large for choice of q."); } } byte[] iv = new byte[BlockSize]; iv[0] = (byte)((q - 1) & 0x7); nonce.CopyTo(iv, 1); IBlockCipher ctrCipher = new SicBlockCipher(cipher); ctrCipher.Init(forEncryption, new ParametersWithIV(keyParam, iv)); int outputLen; int inIndex = inOff; int outIndex = outOff; if (forEncryption) { outputLen = inLen + macSize; Check.OutputLength(output, outOff, outputLen, "Output buffer too short."); calculateMac(input, inOff, inLen, macBlock); ctrCipher.ProcessBlock(macBlock, 0, macBlock, 0); // S0 while (inIndex < (inOff + inLen - BlockSize)) // S1... { ctrCipher.ProcessBlock(input, inIndex, output, outIndex); outIndex += BlockSize; inIndex += BlockSize; } byte[] block = new byte[BlockSize]; Array.Copy(input, inIndex, block, 0, inLen + inOff - inIndex); ctrCipher.ProcessBlock(block, 0, block, 0); Array.Copy(block, 0, output, outIndex, inLen + inOff - inIndex); Array.Copy(macBlock, 0, output, outOff + inLen, macSize); } else { if (inLen < macSize) { throw new InvalidCipherTextException("data too short"); } outputLen = inLen - macSize; Check.OutputLength(output, outOff, outputLen, "Output buffer too short."); Array.Copy(input, inOff + outputLen, macBlock, 0, macSize); ctrCipher.ProcessBlock(macBlock, 0, macBlock, 0); for (int i = macSize; i != macBlock.Length; i++) { macBlock[i] = 0; } while (inIndex < (inOff + outputLen - BlockSize)) { ctrCipher.ProcessBlock(input, inIndex, output, outIndex); outIndex += BlockSize; inIndex += BlockSize; } byte[] block = new byte[BlockSize]; Array.Copy(input, inIndex, block, 0, outputLen - (inIndex - inOff)); ctrCipher.ProcessBlock(block, 0, block, 0); Array.Copy(block, 0, output, outIndex, outputLen - (inIndex - inOff)); byte[] calculatedMacBlock = new byte[BlockSize]; calculateMac(output, outOff, outputLen, calculatedMacBlock); if (!Arrays.ConstantTimeAreEqual(macBlock, calculatedMacBlock)) { throw new InvalidCipherTextException("mac check in CCM failed"); } } return(outputLen); }
public byte[] ProcessPacket( byte[] input, int inOff, int inLen) { if (keyParam == null) { throw new InvalidOperationException("CCM cipher unitialized."); } IBlockCipher ctrCipher = new SicBlockCipher(cipher); byte[] iv = new byte[BlockSize]; byte[] output; iv[0] = (byte)(((15 - nonce.Length) - 1) & 0x7); Array.Copy(nonce, 0, iv, 1, nonce.Length); ctrCipher.Init(forEncryption, new ParametersWithIV(keyParam, iv)); if (forEncryption) { int index = inOff; int outOff = 0; output = new byte[inLen + macSize]; calculateMac(input, inOff, inLen, macBlock); ctrCipher.ProcessBlock(macBlock, 0, macBlock, 0); // S0 while (index < inLen - BlockSize) // S1... { ctrCipher.ProcessBlock(input, index, output, outOff); outOff += BlockSize; index += BlockSize; } byte[] block = new byte[BlockSize]; Array.Copy(input, index, block, 0, inLen - index); ctrCipher.ProcessBlock(block, 0, block, 0); Array.Copy(block, 0, output, outOff, inLen - index); outOff += inLen - index; Array.Copy(macBlock, 0, output, outOff, output.Length - outOff); } else { int index = inOff; int outOff = 0; output = new byte[inLen - macSize]; Array.Copy(input, inOff + inLen - macSize, macBlock, 0, macSize); ctrCipher.ProcessBlock(macBlock, 0, macBlock, 0); for (int i = macSize; i != macBlock.Length; i++) { macBlock[i] = 0; } while (outOff < output.Length - BlockSize) { ctrCipher.ProcessBlock(input, index, output, outOff); outOff += BlockSize; index += BlockSize; } byte[] block = new byte[BlockSize]; Array.Copy(input, index, block, 0, output.Length - outOff); ctrCipher.ProcessBlock(block, 0, block, 0); Array.Copy(block, 0, output, outOff, output.Length - outOff); byte[] calculatedMacBlock = new byte[BlockSize]; calculateMac(output, 0, output.Length, calculatedMacBlock); if (!Arrays.ConstantTimeAreEqual(macBlock, calculatedMacBlock)) { throw new InvalidCipherTextException("mac check in CCM failed"); } } return(output); }
public virtual int ProcessPacket(byte[] input, int inOff, int inLen, byte[] output, int outOff) { if (this.keyParam == null) { throw new InvalidOperationException("CCM cipher unitialized."); } int num = this.nonce.Length; int num2 = 15 - num; if (num2 < 4) { int num3 = 1 << 8 * num2; if (inLen >= num3) { throw new InvalidOperationException("CCM packet too large for choice of q."); } } byte[] array = new byte[CcmBlockCipher.BlockSize]; array[0] = (byte)(num2 - 1 & 7); this.nonce.CopyTo(array, 1); IBlockCipher blockCipher = new SicBlockCipher(this.cipher); blockCipher.Init(this.forEncryption, new ParametersWithIV(this.keyParam, array)); int i = inOff; int num4 = outOff; int num5; if (this.forEncryption) { num5 = inLen + this.macSize; Check.OutputLength(output, outOff, num5, "Output buffer too short."); this.calculateMac(input, inOff, inLen, this.macBlock); blockCipher.ProcessBlock(this.macBlock, 0, this.macBlock, 0); while (i < inOff + inLen - CcmBlockCipher.BlockSize) { blockCipher.ProcessBlock(input, i, output, num4); num4 += CcmBlockCipher.BlockSize; i += CcmBlockCipher.BlockSize; } byte[] array2 = new byte[CcmBlockCipher.BlockSize]; Array.Copy(input, i, array2, 0, inLen + inOff - i); blockCipher.ProcessBlock(array2, 0, array2, 0); Array.Copy(array2, 0, output, num4, inLen + inOff - i); Array.Copy(this.macBlock, 0, output, outOff + inLen, this.macSize); } else { if (inLen < this.macSize) { throw new InvalidCipherTextException("data too short"); } num5 = inLen - this.macSize; Check.OutputLength(output, outOff, num5, "Output buffer too short."); Array.Copy(input, inOff + num5, this.macBlock, 0, this.macSize); blockCipher.ProcessBlock(this.macBlock, 0, this.macBlock, 0); for (int num6 = this.macSize; num6 != this.macBlock.Length; num6++) { this.macBlock[num6] = 0; } while (i < inOff + num5 - CcmBlockCipher.BlockSize) { blockCipher.ProcessBlock(input, i, output, num4); num4 += CcmBlockCipher.BlockSize; i += CcmBlockCipher.BlockSize; } byte[] array3 = new byte[CcmBlockCipher.BlockSize]; Array.Copy(input, i, array3, 0, num5 - (i - inOff)); blockCipher.ProcessBlock(array3, 0, array3, 0); Array.Copy(array3, 0, output, num4, num5 - (i - inOff)); byte[] b = new byte[CcmBlockCipher.BlockSize]; this.calculateMac(output, outOff, num5, b); if (!Arrays.ConstantTimeAreEqual(this.macBlock, b)) { throw new InvalidCipherTextException("mac check in CCM failed"); } } return(num5); }
public byte[] ProcessPacket(byte[] input, int inOff, int inLen) { if (parameters == null) { throw new InvalidOperationException("CCM cipher unitialized."); } IBlockCipher ctrCipher = new SicBlockCipher(cipher); byte[] iv = new byte[blockSize]; byte[] nonce = parameters.GetNonce(); int macSize = parameters.MacSize / 8; byte[] output; iv[0] = (byte)(((15 - nonce.Length) - 1) & 0x7); Array.Copy(nonce, 0, iv, 1, nonce.Length); ctrCipher.Init(forEncryption, new ParametersWithIV(parameters.Key, iv)); if (forEncryption) { int index = inOff; int outOff = 0; output = new byte[inLen + macSize]; calculateMac(input, inOff, inLen, macBlock); ctrCipher.ProcessBlock(macBlock, 0, macBlock, 0); // S0 while (index < inLen - blockSize) // S1... { ctrCipher.ProcessBlock(input, index, output, outOff); outOff += blockSize; index += blockSize; } byte[] block = new byte[blockSize]; Array.Copy(input, index, block, 0, inLen - index); ctrCipher.ProcessBlock(block, 0, block, 0); Array.Copy(block, 0, output, outOff, inLen - index); outOff += inLen - index; Array.Copy(macBlock, 0, output, outOff, output.Length - outOff); } else { int index = inOff; int outOff = 0; output = new byte[inLen - macSize]; Array.Copy(input, inOff + inLen - macSize, macBlock, 0, macSize); ctrCipher.ProcessBlock(macBlock, 0, macBlock, 0); for (int i = macSize; i != macBlock.Length; i++) { macBlock[i] = 0; } while (outOff < output.Length - blockSize) { ctrCipher.ProcessBlock(input, index, output, outOff); outOff += blockSize; index += blockSize; } byte[] block = new byte[blockSize]; Array.Copy(input, index, block, 0, output.Length - outOff); ctrCipher.ProcessBlock(block, 0, block, 0); Array.Copy(block, 0, output, outOff, output.Length - outOff); byte[] calculatedMacBlock = new byte[blockSize]; calculateMac(output, 0, output.Length, calculatedMacBlock); if (!areEqual(macBlock, calculatedMacBlock)) { throw new InvalidCipherTextException("mac check in CCM failed"); } } return output; }
public virtual int ProcessPacket(byte[] input, int inOff, int inLen, byte[] output, int outOff) { int num4; if (this.keyParam == null) { throw new InvalidOperationException("CCM cipher unitialized."); } int length = this.nonce.Length; int num2 = 15 - length; if (num2 < 4) { int num3 = ((int)1) << (8 * num2); if (inLen >= num3) { throw new InvalidOperationException("CCM packet too large for choice of q."); } } byte[] array = new byte[BlockSize]; array[0] = (byte)((num2 - 1) & 7); this.nonce.CopyTo(array, 1); IBlockCipher cipher = new SicBlockCipher(this.cipher); cipher.Init(this.forEncryption, new ParametersWithIV(this.keyParam, array)); int num5 = inOff; int num6 = outOff; if (this.forEncryption) { num4 = inLen + this.macSize; Check.OutputLength(output, outOff, num4, "Output buffer too short."); this.CalculateMac(input, inOff, inLen, this.macBlock); byte[] outBuf = new byte[BlockSize]; cipher.ProcessBlock(this.macBlock, 0, outBuf, 0); while (num5 < ((inOff + inLen) - BlockSize)) { cipher.ProcessBlock(input, num5, output, num6); num6 += BlockSize; num5 += BlockSize; } byte[] buffer3 = new byte[BlockSize]; Array.Copy(input, num5, buffer3, 0, (inLen + inOff) - num5); cipher.ProcessBlock(buffer3, 0, buffer3, 0); Array.Copy(buffer3, 0, output, num6, (inLen + inOff) - num5); Array.Copy(outBuf, 0, output, outOff + inLen, this.macSize); return(num4); } if (inLen < this.macSize) { throw new InvalidCipherTextException("data too short"); } num4 = inLen - this.macSize; Check.OutputLength(output, outOff, num4, "Output buffer too short."); Array.Copy(input, inOff + num4, this.macBlock, 0, this.macSize); cipher.ProcessBlock(this.macBlock, 0, this.macBlock, 0); for (int i = this.macSize; i != this.macBlock.Length; i++) { this.macBlock[i] = 0; } while (num5 < ((inOff + num4) - BlockSize)) { cipher.ProcessBlock(input, num5, output, num6); num6 += BlockSize; num5 += BlockSize; } byte[] destinationArray = new byte[BlockSize]; Array.Copy(input, num5, destinationArray, 0, num4 - (num5 - inOff)); cipher.ProcessBlock(destinationArray, 0, destinationArray, 0); Array.Copy(destinationArray, 0, output, num6, num4 - (num5 - inOff)); byte[] macBlock = new byte[BlockSize]; this.CalculateMac(output, outOff, num4, macBlock); if (!Arrays.ConstantTimeAreEqual(this.macBlock, macBlock)) { throw new InvalidCipherTextException("mac check in CCM failed"); } return(num4); }
public byte[] ProcessPacket( byte[] input, int inOff, int inLen) { // TODO: handle null keyParam (e.g. via RepeatedKeySpec) // Need to keep the CTR and CBC Mac parts around and reset if (keyParam == null) throw new InvalidOperationException("CCM cipher unitialized."); IBlockCipher ctrCipher = new SicBlockCipher(cipher); byte[] iv = new byte[BlockSize]; byte[] output; iv[0] = (byte)(((15 - nonce.Length) - 1) & 0x7); Array.Copy(nonce, 0, iv, 1, nonce.Length); ctrCipher.Init(forEncryption, new ParametersWithIV(keyParam, iv)); if (forEncryption) { int index = inOff; int outOff = 0; output = new byte[inLen + macSize]; calculateMac(input, inOff, inLen, macBlock); ctrCipher.ProcessBlock(macBlock, 0, macBlock, 0); // S0 while (index < inLen - BlockSize) // S1... { ctrCipher.ProcessBlock(input, index, output, outOff); outOff += BlockSize; index += BlockSize; } byte[] block = new byte[BlockSize]; Array.Copy(input, index, block, 0, inLen - index); ctrCipher.ProcessBlock(block, 0, block, 0); Array.Copy(block, 0, output, outOff, inLen - index); outOff += inLen - index; Array.Copy(macBlock, 0, output, outOff, output.Length - outOff); } else { int index = inOff; int outOff = 0; output = new byte[inLen - macSize]; Array.Copy(input, inOff + inLen - macSize, macBlock, 0, macSize); ctrCipher.ProcessBlock(macBlock, 0, macBlock, 0); for (int i = macSize; i != macBlock.Length; i++) { macBlock[i] = 0; } while (outOff < output.Length - BlockSize) { ctrCipher.ProcessBlock(input, index, output, outOff); outOff += BlockSize; index += BlockSize; } byte[] block = new byte[BlockSize]; Array.Copy(input, index, block, 0, output.Length - outOff); ctrCipher.ProcessBlock(block, 0, block, 0); Array.Copy(block, 0, output, outOff, output.Length - outOff); byte[] calculatedMacBlock = new byte[BlockSize]; calculateMac(output, 0, output.Length, calculatedMacBlock); if (!Arrays.ConstantTimeAreEqual(macBlock, calculatedMacBlock)) throw new InvalidCipherTextException("mac check in CCM failed"); } return output; }
public virtual int ProcessPacket(byte[] input, int inOff, int inLen, byte[] output, int outOff) { //IL_000d: Unknown result type (might be due to invalid IL or missing references) //IL_0037: Unknown result type (might be due to invalid IL or missing references) if (keyParam == null) { throw new InvalidOperationException("CCM cipher unitialized."); } int num = nonce.Length; int num2 = 15 - num; if (num2 < 4) { int num3 = 1 << 8 * num2; if (inLen >= num3) { throw new InvalidOperationException("CCM packet too large for choice of q."); } } byte[] array = new byte[BlockSize]; array[0] = (byte)((uint)(num2 - 1) & 7u); ((global::System.Array)nonce).CopyTo((global::System.Array)array, 1); IBlockCipher blockCipher = new SicBlockCipher(cipher); blockCipher.Init(forEncryption, new ParametersWithIV(keyParam, array)); int i = inOff; int num4 = outOff; int num5; if (forEncryption) { num5 = inLen + macSize; Check.OutputLength(output, outOff, num5, "Output buffer too short."); CalculateMac(input, inOff, inLen, macBlock); byte[] array2 = new byte[BlockSize]; blockCipher.ProcessBlock(macBlock, 0, array2, 0); for (; i < inOff + inLen - BlockSize; i += BlockSize) { blockCipher.ProcessBlock(input, i, output, num4); num4 += BlockSize; } byte[] array3 = new byte[BlockSize]; global::System.Array.Copy((global::System.Array)input, i, (global::System.Array)array3, 0, inLen + inOff - i); blockCipher.ProcessBlock(array3, 0, array3, 0); global::System.Array.Copy((global::System.Array)array3, 0, (global::System.Array)output, num4, inLen + inOff - i); global::System.Array.Copy((global::System.Array)array2, 0, (global::System.Array)output, outOff + inLen, macSize); } else { if (inLen < macSize) { throw new InvalidCipherTextException("data too short"); } num5 = inLen - macSize; Check.OutputLength(output, outOff, num5, "Output buffer too short."); global::System.Array.Copy((global::System.Array)input, inOff + num5, (global::System.Array)macBlock, 0, macSize); blockCipher.ProcessBlock(macBlock, 0, macBlock, 0); for (int j = macSize; j != macBlock.Length; j++) { macBlock[j] = 0; } for (; i < inOff + num5 - BlockSize; i += BlockSize) { blockCipher.ProcessBlock(input, i, output, num4); num4 += BlockSize; } byte[] array4 = new byte[BlockSize]; global::System.Array.Copy((global::System.Array)input, i, (global::System.Array)array4, 0, num5 - (i - inOff)); blockCipher.ProcessBlock(array4, 0, array4, 0); global::System.Array.Copy((global::System.Array)array4, 0, (global::System.Array)output, num4, num5 - (i - inOff)); byte[] b = new byte[BlockSize]; CalculateMac(output, outOff, num5, b); if (!Arrays.ConstantTimeAreEqual(macBlock, b)) { throw new InvalidCipherTextException("mac check in CCM failed"); } } return(num5); }