private static void Blake2bLong(byte[] pbOut, int cbOut, byte[] pbIn, int cbIn, Blake2b h) { Debug.Assert((h != null) && (h.HashSize == (64 * 8))); byte[] pbOutLen = new byte[4]; MemUtil.UInt32ToBytesEx((uint)cbOut, pbOutLen, 0); if (cbOut <= 64) { Blake2b hOut = ((cbOut == 64) ? h : new Blake2b(cbOut)); if (cbOut == 64) { hOut.Initialize(); } hOut.TransformBlock(pbOutLen, 0, pbOutLen.Length, pbOutLen, 0); hOut.TransformBlock(pbIn, 0, cbIn, pbIn, 0); hOut.TransformFinalBlock(MemUtil.EmptyByteArray, 0, 0); Array.Copy(hOut.Hash, pbOut, cbOut); if (cbOut < 64) { hOut.Clear(); } return; } h.Initialize(); h.TransformBlock(pbOutLen, 0, pbOutLen.Length, pbOutLen, 0); h.TransformBlock(pbIn, 0, cbIn, pbIn, 0); h.TransformFinalBlock(MemUtil.EmptyByteArray, 0, 0); byte[] pbOutBuffer = new byte[64]; Array.Copy(h.Hash, pbOutBuffer, pbOutBuffer.Length); int ibOut = 64 / 2; Array.Copy(pbOutBuffer, pbOut, ibOut); int cbToProduce = cbOut - ibOut; h.Initialize(); while (cbToProduce > 64) { byte[] pbHash = h.ComputeHash(pbOutBuffer); Array.Copy(pbHash, pbOutBuffer, 64); Array.Copy(pbHash, 0, pbOut, ibOut, 64 / 2); ibOut += 64 / 2; cbToProduce -= 64 / 2; MemUtil.ZeroByteArray(pbHash); } using (Blake2b hOut = new Blake2b(cbToProduce)) { byte[] pbHash = hOut.ComputeHash(pbOutBuffer); Array.Copy(pbHash, 0, pbOut, ibOut, cbToProduce); MemUtil.ZeroByteArray(pbHash); } MemUtil.ZeroByteArray(pbOutBuffer); }
private static void Blake2bLong(byte[] pbOut, int cbOut, byte[] pbIn, int cbIn, Blake2b h) { Debug.Assert((h != null) && (h.HashSize == (64 * 8))); byte[] pbOutLen = new byte[4]; MemUtil.UInt32ToBytesEx((uint)cbOut, pbOutLen, 0); if(cbOut <= 64) { Blake2b hOut = ((cbOut == 64) ? h : new Blake2b(cbOut)); if(cbOut == 64) hOut.Initialize(); hOut.TransformBlock(pbOutLen, 0, pbOutLen.Length, pbOutLen, 0); hOut.TransformBlock(pbIn, 0, cbIn, pbIn, 0); hOut.TransformFinalBlock(MemUtil.EmptyByteArray, 0, 0); Array.Copy(hOut.Hash, pbOut, cbOut); if(cbOut < 64) hOut.Clear(); return; } h.Initialize(); h.TransformBlock(pbOutLen, 0, pbOutLen.Length, pbOutLen, 0); h.TransformBlock(pbIn, 0, cbIn, pbIn, 0); h.TransformFinalBlock(MemUtil.EmptyByteArray, 0, 0); byte[] pbOutBuffer = new byte[64]; Array.Copy(h.Hash, pbOutBuffer, pbOutBuffer.Length); int ibOut = 64 / 2; Array.Copy(pbOutBuffer, pbOut, ibOut); int cbToProduce = cbOut - ibOut; h.Initialize(); while(cbToProduce > 64) { byte[] pbHash = h.ComputeHash(pbOutBuffer); Array.Copy(pbHash, pbOutBuffer, 64); Array.Copy(pbHash, 0, pbOut, ibOut, 64 / 2); ibOut += 64 / 2; cbToProduce -= 64 / 2; MemUtil.ZeroByteArray(pbHash); } using(Blake2b hOut = new Blake2b(cbToProduce)) { byte[] pbHash = hOut.ComputeHash(pbOutBuffer); Array.Copy(pbHash, 0, pbOut, ibOut, cbToProduce); MemUtil.ZeroByteArray(pbHash); } MemUtil.ZeroByteArray(pbOutBuffer); }