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fix(util): mint the pinned uuid bytes without dead fallback branches

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This commit is contained in:
imccyu
2026-08-21 20:35:35 +08:00
parent f910e4f84f
commit 4e6937064c
1 changed files with 4 additions and 3 deletions
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packages/util/crypto/src/index.ts
+4 -3
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@@ -19,8 +19,9 @@ export type Uuid = `${string}-${string}-${string}-${string}-${string}`
export function randomUUID(): Uuid {
const bytes = globalThis.crypto.getRandomValues(new Uint8Array(16))
// RFC 9562 §5.4: version 4 in the high nibble of byte 6, variant 10 in byte 8.
bytes[6] = ((bytes[6] ?? 0) & 0x0f) | 0x40
bytes[8] = ((bytes[8] ?? 0) & 0x3f) | 0x80
const hex = Array.from(bytes, byte => byte.toString(16).padStart(2, '0')).join('')
const hex = Array.from(bytes, (byte, index) => {
const pinned = index === 6 ? (byte & 0x0f) | 0x40 : index === 8 ? (byte & 0x3f) | 0x80 : byte
return pinned.toString(16).padStart(2, '0')
}).join('')
return `${hex.slice(0, 8)}-${hex.slice(8, 12)}-${hex.slice(12, 16)}-${hex.slice(16, 20)}-${hex.slice(20)}`
}