import { Buffer } from "../../../buffer.ts";import AuthCipher from "./auth_cipher.js";import StreamCipher from "./stream_cipher.js";import Transform from "../cipher_base.js";import * as aes from "./aes.js";import ebtk from "../evp_bytes_to_key.ts";import { MODES } from "./modes/mod.js";
function Cipher(mode, key, iv) { Transform.call(this);
this._cache = new Splitter(); this._cipher = new aes.AES(key); this._prev = Buffer.from(iv); this._mode = mode; this._autopadding = true;}
Cipher.prototype = Object.create(Transform.prototype, { constructor: { value: Cipher, enumerable: false, writable: true, configurable: true, },});
Cipher.prototype._update = function (data) { this._cache.add(data); var chunk; var thing; var out = [];
while ((chunk = this._cache.get())) { thing = this._mode.encrypt(this, chunk); out.push(thing); }
return Buffer.concat(out);};
var PADDING = Buffer.alloc(16, 0x10);
Cipher.prototype._final = function () { var chunk = this._cache.flush(); if (this._autopadding) { chunk = this._mode.encrypt(this, chunk); this._cipher.scrub(); return chunk; }
if (!chunk.equals(PADDING)) { this._cipher.scrub(); throw new Error("data not multiple of block length"); }};
Cipher.prototype.setAutoPadding = function (setTo) { this._autopadding = !!setTo; return this;};
function Splitter() { this.cache = Buffer.allocUnsafe(0);}
Splitter.prototype.add = function (data) { this.cache = Buffer.concat([this.cache, data]);};
Splitter.prototype.get = function () { if (this.cache.length > 15) { const out = this.cache.slice(0, 16); this.cache = this.cache.slice(16); return out; } return null;};
Splitter.prototype.flush = function () { var len = 16 - this.cache.length; var padBuff = Buffer.allocUnsafe(len);
var i = -1; while (++i < len) { padBuff.writeUInt8(len, i); }
return Buffer.concat([this.cache, padBuff]);};
export function createCipheriv(suite, password, iv) { var config = MODES[suite.toLowerCase()]; if (!config) throw new TypeError("invalid suite type");
if (typeof password === "string") password = Buffer.from(password); if (password.length !== config.key / 8) { throw new TypeError("invalid key length " + password.length); }
if (typeof iv === "string") iv = Buffer.from(iv); if (config.mode !== "GCM" && iv.length !== config.iv) { throw new TypeError("invalid iv length " + iv.length); }
if (config.type === "stream") { return new StreamCipher(config.module, password, iv); } else if (config.type === "auth") { return new AuthCipher(config.module, password, iv); }
return new Cipher(config.module, password, iv);}
export function createCipher(suite, password) { var config = MODES[suite.toLowerCase()]; if (!config) throw new TypeError("invalid suite type");
var keys = ebtk(password, false, config.key, config.iv); return createCipheriv(suite, keys.key, keys.iv);}