one/dist/esm/platform/crypto/web.mjs

One is a React framework for web, iOS, and Android apps.

function subtle(verb) {
	const found = globalThis.crypto?.subtle;
	if (!found) {
		throw new Error(`${verb} needs a browser with WebCrypto or a native build that includes one`);
	}
	return found;
}
const webDigestSource = async (algorithm, buffer, offset, length) => {
	if (algorithm === "MD5") {
		throw new Error("Crypto.digest: MD5 needs an iOS or Android build");
	}
	return subtle("Crypto.digest").digest(algorithm, new Uint8Array(buffer, offset, length));
};
async function importKey(raw) {
	return subtle("Crypto.aesEncrypt").importKey("raw", raw, "AES-GCM", false, ["encrypt", "decrypt"]);
}
const webAesEngine = {
	async seal(key, iv, plaintext, additionalData, tagLength) {
		const sealed = await subtle("Crypto.aesEncrypt").encrypt({
			name: "AES-GCM",
			iv,
			tagLength: tagLength * 8,
			...additionalData ? { additionalData } : {}
		}, await importKey(key), plaintext);
		return new Uint8Array(sealed);
	},
	async open(key, iv, ciphertextWithTag, additionalData, tagLength) {
		try {
			const opened = await subtle("Crypto.aesDecrypt").decrypt({
				name: "AES-GCM",
				iv,
				tagLength: tagLength * 8,
				...additionalData ? { additionalData } : {}
			}, await importKey(key), ciphertextWithTag);
			return new Uint8Array(opened);
		} catch {
			throw new Error("Crypto.aesDecrypt: authentication failed");
		}
	},
	random(bytes) {
		const getRandomValues = globalThis.crypto?.getRandomValues;
		if (typeof getRandomValues !== "function") {
			throw new Error("secure random: web crypto is unavailable in this browser.");
		}
		getRandomValues.call(globalThis.crypto, bytes);
	}
};

export { webAesEngine, webDigestSource };
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