@logismika/crypto/build/cjs/kuznechik/encrypt.js

Crypto algorithms library

"use strict";
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
    function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
    return new (P || (P = Promise))(function (resolve, reject) {
        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
        function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
        function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
        step((generator = generator.apply(thisArg, _arguments || [])).next());
    });
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.encryptBlock = exports.encrypt = void 0;
const common_1 = require("./common");
const expandKey_1 = require("./expandKey");
const encrypt = (key, data) => __awaiter(void 0, void 0, void 0, function* () {
    const result = new Uint8Array((0, common_1.getOutLength)(data.length));
    const expandedKey = yield (0, expandKey_1.expandKey)(key);
    for (let i = 0; i < data.length; i += common_1.BLOCK_SIZE) {
        const block = data.subarray(i, i + common_1.BLOCK_SIZE);
        const encrypted = (0, exports.encryptBlock)(expandedKey, block);
        result.set(encrypted, i);
    }
    return result;
});
exports.encrypt = encrypt;
const encryptBlock = (key, blk) => {
    let out_blk = blk.slice();
    for (let i = 0; i < 9; i += 1) {
        out_blk = (0, common_1.GOST_Kuz_X)(key.iter_key[i], out_blk);
        out_blk = (0, common_1.GOST_Kuz_S)(out_blk);
        out_blk = (0, common_1.GOST_Kuz_L)(out_blk);
    }
    return (0, common_1.GOST_Kuz_X)(out_blk, key.iter_key[9]);
};
exports.encryptBlock = encryptBlock;