protected void ValidateParameters( byte[] inputBuffer, int inputOffset, int inputCount, byte[] outputBuffer, int outputOffset, bool allowZeroCount) { this.ValidateInputBufferParameters(inputBuffer, inputOffset, inputCount, true, allowZeroCount); OperationStream.ValidateBufferParameters(outputBuffer, outputOffset, 0, true); }
protected void ValidateInputBufferParameters( byte[] inputBuffer, int inputOffset, int inputCount, bool validateBlockSize, bool allowZeroCount) { OperationStream.ValidateBufferParameters(inputBuffer, inputOffset, inputCount, allowZeroCount); if (this.FixedInputBlockSize && validateBlockSize && inputCount % this.InputBlockSize != 0) { throw new ArgumentException("Invalid value.", nameof(inputCount)); } }
public uint UpdateChecksum(uint checksum, byte[] buffer, int offset, int length) { if (checksum == 1U || buffer == null) { checksum = 0U; } if (buffer != null) { OperationStream.ValidateBufferParameters(buffer, offset, length, true); checksum ^= uint.MaxValue; for (int index = 0; index < length; ++index) { checksum = Crc32.ComputeCrc32(checksum, buffer[offset + index]); } checksum ^= uint.MaxValue; } return(checksum); }
public override void Write(byte[] buffer, int offset, int count) { this.EnsureNotDisposed(); OperationStream.ValidateBufferParameters(buffer, offset, count, true); if (!this.CanWrite) { throw new NotSupportedException(); } this.TotalPlainCount += (long)count; int count1 = count; int num1 = offset; if (this.inputBufferIndex > 0) { if (count < this.Transform.InputBlockSize - this.inputBufferIndex) { Buffer.BlockCopy((Array)buffer, offset, (Array)this.inputBuffer, this.inputBufferIndex, count); this.inputBufferIndex += count; return; } Buffer.BlockCopy((Array)buffer, offset, (Array)this.inputBuffer, this.inputBufferIndex, this.Transform.InputBlockSize - this.inputBufferIndex); num1 += this.Transform.InputBlockSize - this.inputBufferIndex; count1 -= this.Transform.InputBlockSize - this.inputBufferIndex; this.inputBufferIndex = this.Transform.InputBlockSize; } if (this.outputBufferIndex > 0) { this.baseStream.Write(this.outputBuffer, 0, this.outputBufferIndex); this.outputBufferIndex = 0; } if (this.inputBufferIndex == this.Transform.InputBlockSize) { int count2 = this.Transform.TransformBlock(this.inputBuffer, 0, this.Transform.InputBlockSize, this.outputBuffer, 0); this.TotalTransformedCount += (long)count2; this.baseStream.Write(this.outputBuffer, 0, count2); this.inputBufferIndex = 0; } while (count1 > 0) { if (count1 < this.Transform.InputBlockSize) { Buffer.BlockCopy((Array)buffer, num1, (Array)this.inputBuffer, 0, count1); this.inputBufferIndex += count1; break; } if (!this.Transform.CanTransformMultipleBlocks) { int count2 = this.Transform.TransformBlock(buffer, num1, this.Transform.InputBlockSize, this.outputBuffer, 0); this.TotalTransformedCount += (long)count2; this.baseStream.Write(this.outputBuffer, 0, count2); num1 += this.Transform.InputBlockSize; count1 -= this.Transform.InputBlockSize; } else { int num2 = count1 / this.Transform.InputBlockSize; int inputCount = num2 * this.Transform.InputBlockSize; byte[] numArray = new byte[num2 * this.Transform.OutputBlockSize]; int count2 = this.Transform.TransformBlock(buffer, num1, inputCount, numArray, 0); this.TotalTransformedCount += (long)count2; this.baseStream.Write(numArray, 0, count2); num1 += inputCount; count1 -= inputCount; } } }
public override int Read(byte[] buffer, int offset, int count) { this.EnsureNotDisposed(); OperationStream.ValidateBufferParameters(buffer, offset, count, true); if (!this.CanRead) { throw new NotSupportedException(); } int num1 = count; int dstOffset = offset; if (this.outputBufferIndex != 0) { if (this.outputBufferIndex > count) { Buffer.BlockCopy((Array)this.outputBuffer, 0, (Array)buffer, offset, count); Buffer.BlockCopy((Array)this.outputBuffer, count, (Array)this.outputBuffer, 0, this.outputBufferIndex - count); this.outputBufferIndex -= count; return(count); } Buffer.BlockCopy((Array)this.outputBuffer, 0, (Array)buffer, offset, this.outputBufferIndex); num1 -= this.outputBufferIndex; dstOffset += this.outputBufferIndex; this.outputBufferIndex = 0; } if (this.finalBlockTransformed) { return(count - num1); } if (num1 > this.Transform.OutputBlockSize && this.Transform.CanTransformMultipleBlocks) { int length = (int)Math.Min((long)(num1 / this.Transform.OutputBlockSize * this.Transform.InputBlockSize), this.Length - this.Position); byte[] numArray = new byte[length]; Buffer.BlockCopy((Array)this.inputBuffer, 0, (Array)numArray, 0, this.inputBufferIndex); int num2 = this.inputBufferIndex + this.baseStream.Read(numArray, this.inputBufferIndex, length - this.inputBufferIndex); this.TotalTransformedCount += (long)(num2 - this.inputBufferIndex); this.inputBufferIndex = 0; if (num2 > this.Transform.InputBlockSize) { int num3 = num2 / this.Transform.InputBlockSize * this.Transform.InputBlockSize; int count1 = num2 - num3; if (count1 != 0) { this.inputBufferIndex = count1; Buffer.BlockCopy((Array)numArray, num3, (Array)this.inputBuffer, 0, count1); } byte[] outputBuffer = new byte[num3 / this.Transform.InputBlockSize * this.Transform.OutputBlockSize]; int count2 = this.Transform.TransformBlock(numArray, 0, num3, outputBuffer, 0); this.TotalPlainCount += (long)count2; Buffer.BlockCopy((Array)outputBuffer, 0, (Array)buffer, dstOffset, count2); Array.Clear((Array)numArray, 0, numArray.Length); Array.Clear((Array)outputBuffer, 0, outputBuffer.Length); num1 -= count2; dstOffset += count2; } else { this.inputBuffer = numArray; this.inputBufferIndex = num2; } } int count3; for (; num1 > 0; num1 -= count3) { int num2; for (; this.inputBufferIndex < this.Transform.InputBlockSize; this.inputBufferIndex += num2) { num2 = this.baseStream.Read(this.inputBuffer, this.inputBufferIndex, (int)Math.Min((long)(this.Transform.InputBlockSize - this.inputBufferIndex), this.Length - this.Position)); this.TotalTransformedCount += (long)num2; if (num2 == 0) { byte[] numArray = this.Transform.TransformFinalBlock(this.inputBuffer, 0, this.inputBufferIndex); this.TotalPlainCount += (long)numArray.Length; this.outputBuffer = numArray; this.outputBufferIndex = numArray.Length; this.finalBlockTransformed = true; if (num1 >= this.outputBufferIndex) { Buffer.BlockCopy((Array)this.outputBuffer, 0, (Array)buffer, dstOffset, this.outputBufferIndex); int num3 = num1 - this.outputBufferIndex; this.outputBufferIndex = 0; return(count - num3); } Buffer.BlockCopy((Array)this.outputBuffer, 0, (Array)buffer, dstOffset, num1); this.outputBufferIndex -= num1; Buffer.BlockCopy((Array)this.outputBuffer, num1, (Array)this.outputBuffer, 0, this.outputBufferIndex); return(count); } } count3 = this.Transform.TransformBlock(this.inputBuffer, 0, this.Transform.InputBlockSize, this.outputBuffer, 0); this.TotalPlainCount += (long)count3; this.inputBufferIndex = 0; if (num1 < count3) { Buffer.BlockCopy((Array)this.outputBuffer, 0, (Array)buffer, dstOffset, num1); this.outputBufferIndex = count3 - num1; Buffer.BlockCopy((Array)this.outputBuffer, num1, (Array)this.outputBuffer, 0, this.outputBufferIndex); return(count); } Buffer.BlockCopy((Array)this.outputBuffer, 0, (Array)buffer, dstOffset, count3); dstOffset += count3; } return(count); }