30 lines
870 B
TypeScript
30 lines
870 B
TypeScript
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import { Conf } from '@/config.ts';
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import { generateSeededRsa, LRUCache, publicKeyToPem, secp } from '@/deps.ts';
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const opts = {
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bits: 1024,
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};
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const rsaCache = new LRUCache<string, Promise<string>>({ max: 1000 });
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async function buildSeed(pubkey: string): Promise<string> {
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const key = await Conf.cryptoKey;
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const data = new TextEncoder().encode(pubkey);
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const signature = await window.crypto.subtle.sign('HMAC', key, data);
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return secp.utils.bytesToHex(new Uint8Array(signature));
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}
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async function getPublicKeyPem(pubkey: string): Promise<string> {
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const cached = await rsaCache.get(pubkey);
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if (cached) return cached;
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const seed = await buildSeed(pubkey);
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const { publicKey } = await generateSeededRsa(seed, opts);
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const promise = publicKeyToPem(publicKey);
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rsaCache.set(pubkey, promise);
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return promise;
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}
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export { getPublicKeyPem };
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