49 lines
1.9 KiB
TypeScript
49 lines
1.9 KiB
TypeScript
//---------------------------------------------------------------------------
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// @syndicate-lang/core, an implementation of Syndicate dataspaces for JS.
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// Copyright (C) 2016-2021 Tony Garnock-Jones <tonyg@leastfixedpoint.com>
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <https://www.gnu.org/licenses/>.
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//---------------------------------------------------------------------------
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import { Bytes } from '@preserves/core';
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import * as node_crypto from 'crypto';
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export function _btoa(s: string): string {
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try {
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return btoa(s);
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} catch (e) {
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return Buffer.from(s).toString('base64');
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}
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}
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function _finish(hexOutput: boolean, buf: Uint8Array): string {
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if (hexOutput) {
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return Bytes.from(buf).toHex();
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} else {
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return _btoa(String.fromCharCode.apply(null, buf as unknown as number[])).replace(/=/g,'');
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}
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}
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export const randomId =
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(typeof crypto !== 'undefined' && 'getRandomValues' in crypto)
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? ((byteCount: number, hexOutput: boolean = false): string => {
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const buf = new Uint8Array(byteCount);
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crypto.getRandomValues(buf);
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return _finish(hexOutput, buf);
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})
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: ((byteCount: number, hexOutput: boolean = false): string => {
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let buf = node_crypto.randomBytes(byteCount);
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return _finish(hexOutput, buf);
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});
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