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import { fromBase58 } from "../util/base58";
export async function generateKey() {
return await crypto.subtle.generateKey(
{
name: "AES-GCM",
length: 128,
},
true,
["encrypt", "decrypt"],
);
}
export async function encrypt(text: string): Promise<{ encrypted: Uint8Array; iv: Uint8Array; key: Uint8Array }> {
const key = await generateKey();
const iv = crypto.getRandomValues(new Uint8Array(16));
const encryptedBuffer = await crypto.subtle.encrypt(
{
name: "AES-GCM",
iv,
},
key,
new TextEncoder().encode(text),
);
const exportedKey = await crypto.subtle.exportKey("raw", key);
return {
encrypted: new Uint8Array(encryptedBuffer),
key: new Uint8Array(exportedKey),
iv,
};
}
export async function decrypt(encrypted: string, keyData: Uint8Array, iv: string, keyVersion: number): Promise<string> {
const algorithm = keyVersion === 1 ? "AES-CBC" : "AES-GCM";
const key = await crypto.subtle.importKey("raw", keyData, { name: algorithm, length: 128 }, false, ["decrypt"]);
const decrypted = await crypto.subtle.decrypt(
{
name: algorithm,
iv: fromBase58(iv),
},
key,
fromBase58(encrypted),
);
return new TextDecoder().decode(decrypted);
}
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