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refactor: optimize random byte generation for recovery and JWT secret functions

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shuaiplus
2026-03-12 01:59:28 +08:00
parent f51468b7b9
commit a994214e4a
5 changed files with 25 additions and 22 deletions
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src/utils/recovery-code.ts
+8 -7
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@@ -1,4 +1,6 @@
const RECOVERY_ALPHABET = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ234567';
const RECOVERY_ALPHABET_LENGTH = RECOVERY_ALPHABET.length;
const RECOVERY_MAX_UNBIASED_BYTE = Math.floor(256 / RECOVERY_ALPHABET_LENGTH) * RECOVERY_ALPHABET_LENGTH;
function normalizeRecoveryCode(raw: string): string {
return String(raw || '').toUpperCase().replace(/[^A-Z2-7]/g, '');
@@ -9,15 +11,14 @@ function formatRecoveryCode(compact: string): string {
}
export function createRecoveryCode(): string {
const bytes = crypto.getRandomValues(new Uint8Array(20));
let compact = '';
for (const b of bytes) {
compact += RECOVERY_ALPHABET[b % RECOVERY_ALPHABET.length];
}
// 20 bytes -> 20 chars in this simple mapping. Expand to 32 chars for friendlier grouping.
while (compact.length < 32) {
const extra = crypto.getRandomValues(new Uint8Array(1))[0];
compact += RECOVERY_ALPHABET[extra % RECOVERY_ALPHABET.length];
const bytes = crypto.getRandomValues(new Uint8Array(32));
for (const b of bytes) {
if (b >= RECOVERY_MAX_UNBIASED_BYTE) continue;
compact += RECOVERY_ALPHABET[b % RECOVERY_ALPHABET_LENGTH];
if (compact.length >= 32) break;
}
}
return formatRecoveryCode(compact.slice(0, 32));
}