@libp2p/crypto/dist/src/hmac/index.browser.js

Crypto primitives for libp2p

import webcrypto from '../webcrypto/index.js';
import lengths from './lengths.js';
const hashTypes = {
    SHA1: 'SHA-1',
    SHA256: 'SHA-256',
    SHA512: 'SHA-512'
};
const sign = async (key, data) => {
    const buf = await webcrypto.get().subtle.sign({ name: 'HMAC' }, key, data);
    return new Uint8Array(buf, 0, buf.byteLength);
};
export async function create(hashType, secret) {
    const hash = hashTypes[hashType];
    const key = await webcrypto.get().subtle.importKey('raw', secret, {
        name: 'HMAC',
        hash: { name: hash }
    }, false, ['sign']);
    return {
        async digest(data) {
            return sign(key, data);
        },
        length: lengths[hashType]
    };
}
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