ts-mls/dist/src/crypto/hash.js

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import { utf8ToBytes } from "@noble/ciphers/utils";
import { encodeVarLenData } from "../codec/variableLength";
import { bytesToBuffer } from "../util/byteArray";
export function makeHashImpl(sc, h) {
    return {
        async digest(data) {
            const result = await sc.digest(h, bytesToBuffer(data));
            return new Uint8Array(result);
        },
        async mac(key, data) {
            const result = await sc.sign("HMAC", await importMacKey(key, h), bytesToBuffer(data));
            return new Uint8Array(result);
        },
        async verifyMac(key, mac, data) {
            return sc.verify("HMAC", await importMacKey(key, h), bytesToBuffer(mac), bytesToBuffer(data));
        },
    };
}
function importMacKey(rawKey, h) {
    return crypto.subtle.importKey("raw", bytesToBuffer(rawKey), {
        name: "HMAC",
        hash: { name: h },
    }, false, ["sign", "verify"]);
}
export function refhash(label, value, h) {
    return h.digest(encodeRefHash(label, value));
}
function encodeRefHash(label, value) {
    const labelBytes = utf8ToBytes(label);
    return new Uint8Array([...encodeVarLenData(labelBytes), ...encodeVarLenData(value)]);
}
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