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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.
// deno-lint-ignore-file no-var
import { Buffer } from "internal:deno_node/polyfills/buffer.ts";
import AuthCipher from "internal:deno_node/polyfills/_crypto/crypto_browserify/browserify_aes/auth_cipher.js";
import StreamCipher from "internal:deno_node/polyfills/_crypto/crypto_browserify/browserify_aes/stream_cipher.js";
import Transform from "internal:deno_node/polyfills/_crypto/crypto_browserify/cipher_base.js";
import * as aes from "internal:deno_node/polyfills/_crypto/crypto_browserify/browserify_aes/aes.js";
import ebtk from "internal:deno_node/polyfills/_crypto/crypto_browserify/evp_bytes_to_key.ts";
import { MODES } from "internal:deno_node/polyfills/_crypto/crypto_browserify/browserify_aes/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);
}
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