49 lines
1.7 KiB
TypeScript
49 lines
1.7 KiB
TypeScript
/*
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* Copyright (C) 2026 Fluxer Contributors
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*
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* This file is part of Fluxer.
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*
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* Fluxer is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero 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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* Fluxer 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 Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with Fluxer. If not, see <https://www.gnu.org/licenses/>.
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*/
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const getRandomBytes = (size = 10) => crypto.getRandomValues(new Uint8Array(size));
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const encodeTotpKey = (bin: Uint8Array) => {
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const alphabet = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ234567';
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let bits = '';
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for (const byte of bin) {
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bits += byte.toString(2).padStart(8, '0');
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}
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let base32 = '';
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for (let i = 0; i < bits.length; i += 5) {
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const chunk = bits.substring(i, i + 5).padEnd(5, '0');
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base32 += alphabet[Number.parseInt(chunk, 2)];
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}
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return base32
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.toLowerCase()
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.replace(/(.{4})/g, '$1 ')
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.trim();
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};
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export const generateTotpSecret = () => encodeTotpKey(getRandomBytes());
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export const encodeTotpSecret = (secret: string) => secret.replace(/[\s._-]+/g, '').toUpperCase();
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export const encodeTotpSecretAsURL = (accountName: string, secret: string, issuer = 'Fluxer') =>
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`otpauth://totp/${encodeURIComponent(issuer)}:${encodeURIComponent(accountName)}\
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?secret=${encodeTotpSecret(secret)}\
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&issuer=${encodeURIComponent(issuer)}`;
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