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std/node/_crypto/crypto_browserify/browserify_aes/modes/cfb8.js

Deno standard library
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// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.// Copyright 2014-2017 browserify-aes contributors. All rights reserved. MIT license.// Copyright 2013 Maxwell Krohn. All rights reserved. MIT license.// Copyright 2009-2013 Jeff Mott. All rights reserved. MIT license.
import { Buffer } from "../../../../buffer.ts";
function encryptByte(self, byteParam, decrypt) {  const pad = self._cipher.encryptBlock(self._prev);  const out = pad[0] ^ byteParam;
  self._prev = Buffer.concat([    self._prev.slice(1),    Buffer.from([decrypt ? byteParam : out]),  ]);
  return out;}
export const encrypt = function (self, chunk, decrypt) {  const len = chunk.length;  const out = Buffer.allocUnsafe(len);  let i = -1;
  while (++i < len) {    out[i] = encryptByte(self, chunk[i], decrypt);  }
  return out;};