61 lines
3.3 KiB
JavaScript
61 lines
3.3 KiB
JavaScript
"use strict";
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// Output Feedback
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var __classPrivateFieldSet = (this && this.__classPrivateFieldSet) || function (receiver, state, value, kind, f) {
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if (kind === "m") throw new TypeError("Private method is not writable");
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if (kind === "a" && !f) throw new TypeError("Private accessor was defined without a setter");
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if (typeof state === "function" ? receiver !== state || !f : !state.has(receiver)) throw new TypeError("Cannot write private member to an object whose class did not declare it");
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return (kind === "a" ? f.call(receiver, value) : f ? f.value = value : state.set(receiver, value)), value;
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};
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var __classPrivateFieldGet = (this && this.__classPrivateFieldGet) || function (receiver, state, kind, f) {
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if (kind === "a" && !f) throw new TypeError("Private accessor was defined without a getter");
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if (typeof state === "function" ? receiver !== state || !f : !state.has(receiver)) throw new TypeError("Cannot read private member from an object whose class did not declare it");
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return kind === "m" ? f : kind === "a" ? f.call(receiver) : f ? f.value : state.get(receiver);
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};
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var _OFB_iv, _OFB_lastPrecipher, _OFB_lastPrecipherIndex;
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.OFB = void 0;
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const mode_js_1 = require("./mode.js");
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class OFB extends mode_js_1.ModeOfOperation {
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constructor(key, iv) {
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super("OFB", key, OFB);
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_OFB_iv.set(this, void 0);
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_OFB_lastPrecipher.set(this, void 0);
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_OFB_lastPrecipherIndex.set(this, void 0);
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if (iv) {
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if (iv.length % 16) {
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throw new TypeError("invalid iv size (must be 16 bytes)");
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}
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__classPrivateFieldSet(this, _OFB_iv, new Uint8Array(iv), "f");
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}
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else {
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__classPrivateFieldSet(this, _OFB_iv, new Uint8Array(16), "f");
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}
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__classPrivateFieldSet(this, _OFB_lastPrecipher, this.iv, "f");
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__classPrivateFieldSet(this, _OFB_lastPrecipherIndex, 16, "f");
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}
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get iv() { return new Uint8Array(__classPrivateFieldGet(this, _OFB_iv, "f")); }
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encrypt(plaintext) {
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var _a, _b;
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if (plaintext.length % 16) {
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throw new TypeError("invalid plaintext size (must be multiple of 16 bytes)");
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}
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const ciphertext = new Uint8Array(plaintext);
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for (let i = 0; i < ciphertext.length; i++) {
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if (__classPrivateFieldGet(this, _OFB_lastPrecipherIndex, "f") === 16) {
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__classPrivateFieldSet(this, _OFB_lastPrecipher, this.aes.encrypt(__classPrivateFieldGet(this, _OFB_lastPrecipher, "f")), "f");
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__classPrivateFieldSet(this, _OFB_lastPrecipherIndex, 0, "f");
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}
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ciphertext[i] ^= __classPrivateFieldGet(this, _OFB_lastPrecipher, "f")[__classPrivateFieldSet(this, _OFB_lastPrecipherIndex, (_b = __classPrivateFieldGet(this, _OFB_lastPrecipherIndex, "f"), _a = _b++, _b), "f"), _a];
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}
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return ciphertext;
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}
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decrypt(ciphertext) {
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if (ciphertext.length % 16) {
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throw new TypeError("invalid ciphertext size (must be multiple of 16 bytes)");
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}
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return this.encrypt(ciphertext);
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}
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}
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exports.OFB = OFB;
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_OFB_iv = new WeakMap(), _OFB_lastPrecipher = new WeakMap(), _OFB_lastPrecipherIndex = new WeakMap();
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//# sourceMappingURL=mode-ofb.js.map
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