@planq-network/encrypted-backup/lib/schema.js

Libraries for implemented password encrypted account backups

"use strict";
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    if (k2 === undefined) k2 = k;
    var desc = Object.getOwnPropertyDescriptor(m, k);
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    if (k2 === undefined) k2 = k;
    o[k2] = m[k];
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    Object.defineProperty(o, "default", { enumerable: true, value: v });
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    o["default"] = v;
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var __importStar = (this && this.__importStar) || function (mod) {
    if (mod && mod.__esModule) return mod;
    var result = {};
    if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
    __setModuleDefault(result, mod);
    return result;
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.deserializeBackup = exports.serializeBackup = exports.BackupSchema = exports.BufferFromBase64 = void 0;
var result_1 = require("@planq-network/base/lib/result");
var domains_1 = require("@planq-network/phone-number-privacy-common/lib/domains");
var Either_1 = require("fp-ts/lib/Either");
var pipeable_1 = require("fp-ts/lib/pipeable");
var t = __importStar(require("io-ts"));
var config_1 = require("./config");
var errors_1 = require("./errors");
var BASE64_REGEXP = /^(?:[A-Za-z0-9+\/]{4})*(?:[A-Za-z0-9+\/]{2}==|[A-Za-z0-9+\/]{3}=)?$/;
/** Utility type to leverage io-ts for encoding and decoding of buffers from base64 strings. */
exports.BufferFromBase64 = new t.Type('BufferFromBase64', Buffer.isBuffer, function (unk, context) {
    return (0, pipeable_1.pipe)(t.string.validate(unk, context), (0, Either_1.chain)(function (str) {
        // Check that the string is base64 data and return the decoding if it is.
        if (!BASE64_REGEXP.test(str)) {
            return t.failure(unk, context, 'provided string is not base64');
        }
        return t.success(Buffer.from(str, 'base64'));
    }));
}, function (buffer) { return buffer.toString('base64'); });
/** io-ts codec used to encode and decode backups from JSON objects */
exports.BackupSchema = t.intersection([
    // Required fields
    t.type({
        encryptedData: exports.BufferFromBase64,
        nonce: exports.BufferFromBase64,
        version: t.string,
    }),
    // Optional fields
    // https://github.com/gcanti/io-ts/blob/master/index.md#mixing-required-and-optional-props
    t.partial({
        odisDomain: domains_1.SequentialDelayDomainSchema,
        metadata: t.UnknownRecord,
        encryptedFuseKey: exports.BufferFromBase64,
        computationalHardening: t.union([
            t.type({
                function: t.literal(config_1.ComputationalHardeningFunction.PBKDF),
                iterations: t.number,
            }),
            t.intersection([
                t.type({
                    function: t.literal(config_1.ComputationalHardeningFunction.SCRYPT),
                    cost: t.number,
                }),
                t.partial({
                    blockSize: t.number,
                    parallelization: t.number,
                }),
            ]),
        ]),
        environment: t.partial({
            odis: t.type({
                odisUrl: t.string,
                odisPubKey: t.string,
            }),
            circuitBreaker: t.type({
                url: t.string,
                publicKey: t.string,
            }),
        }),
    }),
]);
function serializeBackup(backup) {
    return JSON.stringify(exports.BackupSchema.encode(backup));
}
exports.serializeBackup = serializeBackup;
function deserializeBackup(data) {
    var jsonDecode = (0, result_1.parseJsonAsResult)(data);
    if (!jsonDecode.ok) {
        return (0, result_1.Err)(new errors_1.DecodeError(jsonDecode.error));
    }
    var decoding = exports.BackupSchema.decode(jsonDecode.result);
    if ((0, Either_1.isLeft)(decoding)) {
        return (0, result_1.Err)(new errors_1.DecodeError(new Error("error in validating backup object: ".concat(JSON.stringify(decoding.left)))));
    }
    var backup = decoding.right;
    if (backup.nonce.length !== 32) {
        return (0, result_1.Err)(new errors_1.DecodeError(new Error("expected backup nonce to be 32 bytes but got ".concat(backup.nonce.length))));
    }
    return (0, result_1.Ok)(backup);
}
exports.deserializeBackup = deserializeBackup;
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