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// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.// Copyright 2017 crypto-browserify. All rights reserved. MIT license.// deno-lint-ignore-file no-var
import { Buffer } from "../../buffer.ts";import { Transform } from "../../stream.ts";import { StringDecoder } from "../../string_decoder.ts";
export function CipherBase(hashMode) {  Transform.call(this);  this.hashMode = typeof hashMode === "string";  if (this.hashMode) {    this[hashMode] = this._finalOrDigest;  } else {    this.final = this._finalOrDigest;  }  if (this._final) {    this.__final = this._final;    this._final = null;  }  this._decoder = null;  this._encoding = null;}// inherits(CipherBase, Transform)CipherBase.prototype = Object.create(Transform.prototype, {  constructor: {    value: CipherBase,    enumerable: false,    writable: true,    configurable: true,  },});
CipherBase.prototype.update = function (data, inputEnc, outputEnc) {  if (typeof data === "string") {    data = Buffer.from(data, inputEnc);  }
  var outData = this._update(data);  if (this.hashMode) return this;
  if (outputEnc) {    outData = this._toString(outData, outputEnc);  }
  return outData;};
CipherBase.prototype.setAutoPadding = function () {};CipherBase.prototype.getAuthTag = function () {  throw new Error("trying to get auth tag in unsupported state");};
CipherBase.prototype.setAuthTag = function () {  throw new Error("trying to set auth tag in unsupported state");};
CipherBase.prototype.setAAD = function () {  throw new Error("trying to set aad in unsupported state");};
CipherBase.prototype._transform = function (data, _, next) {  var err;  try {    if (this.hashMode) {      this._update(data);    } else {      this.push(this._update(data));    }  } catch (e) {    err = e;  } finally {    next(err);  }};CipherBase.prototype._flush = function (done) {  var err;  try {    this.push(this.__final());  } catch (e) {    err = e;  }
  done(err);};CipherBase.prototype._finalOrDigest = function (outputEnc) {  var outData = this.__final() || Buffer.alloc(0);  if (outputEnc) {    outData = this._toString(outData, outputEnc, true);  }  return outData;};
CipherBase.prototype._toString = function (value, enc, fin) {  if (!this._decoder) {    this._decoder = new StringDecoder(enc);    this._encoding = enc;  }
  if (this._encoding !== enc) throw new Error("can't switch encodings");
  var out = this._decoder.write(value);  if (fin) {    out += this._decoder.end();  }
  return out;};
export default CipherBase;