40 lines
1.3 KiB
TypeScript
40 lines
1.3 KiB
TypeScript
import { getCryptoBackend } from './backend.js';
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export interface X25519KeyPair {
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publicKey: Uint8Array; // 32 bytes
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privateKey: Uint8Array; // 32 bytes
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}
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export async function generateX25519KeyPair(): Promise<X25519KeyPair> {
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const backend = getCryptoBackend();
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const kp = backend.generateKeyPair();
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return { publicKey: kp.publicKey, privateKey: kp.privateKey };
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}
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// ---- base64 helpers (used to persist private keys client-side) ----------
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// Use browser-native btoa/atob. Both are available in Tauri webview and RN
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// (Expo polyfills atob/btoa). No external dep needed.
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export async function toBase64(bytes: Uint8Array): Promise<string> {
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let binary = '';
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for (let i = 0; i < bytes.length; i++) {
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binary += String.fromCharCode(bytes[i]!);
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}
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return btoa(binary);
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}
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export async function fromBase64(input: string): Promise<Uint8Array> {
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const binary = atob(input);
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const out = new Uint8Array(binary.length);
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for (let i = 0; i < binary.length; i++) {
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out[i] = binary.charCodeAt(i);
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}
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return out;
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}
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// Wipe a key best-effort. JS can't truly guarantee zeroization but
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// overwriting the buffer removes the value from live references.
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export function wipe(bytes: Uint8Array): void {
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for (let i = 0; i < bytes.length; i++) bytes[i] = 0;
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}
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