73 lines
2.1 KiB
JavaScript
73 lines
2.1 KiB
JavaScript
"use strict";
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var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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exports.encodeRecoveryKey = encodeRecoveryKey;
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exports.decodeRecoveryKey = decodeRecoveryKey;
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var _bs = _interopRequireDefault(require("bs58"));
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/*
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Copyright 2018 New Vector Ltd
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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// picked arbitrarily but to try & avoid clashing with any bitcoin ones
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// (which are also base58 encoded, but bitcoin's involve a lot more hashing)
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const OLM_RECOVERY_KEY_PREFIX = [0x8B, 0x01];
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function encodeRecoveryKey(key) {
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const buf = new Buffer(OLM_RECOVERY_KEY_PREFIX.length + key.length + 1);
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buf.set(OLM_RECOVERY_KEY_PREFIX, 0);
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buf.set(key, OLM_RECOVERY_KEY_PREFIX.length);
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let parity = 0;
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for (let i = 0; i < buf.length - 1; ++i) {
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parity ^= buf[i];
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}
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buf[buf.length - 1] = parity;
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const base58key = _bs.default.encode(buf);
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return base58key.match(/.{1,4}/g).join(" ");
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}
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function decodeRecoveryKey(recoverykey) {
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const result = _bs.default.decode(recoverykey.replace(/ /g, ''));
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let parity = 0;
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for (const b of result) {
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parity ^= b;
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}
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if (parity !== 0) {
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throw new Error("Incorrect parity");
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}
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for (let i = 0; i < OLM_RECOVERY_KEY_PREFIX.length; ++i) {
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if (result[i] !== OLM_RECOVERY_KEY_PREFIX[i]) {
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throw new Error("Incorrect prefix");
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}
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}
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if (result.length !== OLM_RECOVERY_KEY_PREFIX.length + global.Olm.PRIVATE_KEY_LENGTH + 1) {
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throw new Error("Incorrect length");
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}
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return Uint8Array.from(result.slice(OLM_RECOVERY_KEY_PREFIX.length, OLM_RECOVERY_KEY_PREFIX.length + global.Olm.PRIVATE_KEY_LENGTH));
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} |