ts-mls/dist/test/test-vectors/transcriptHashes.test.js

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import { getCiphersuiteFromId, getCiphersuiteImpl } from "../../src/crypto/ciphersuite";
import { hexToBytes } from "@noble/ciphers/utils";
import json from "../../test_vectors/transcript-hashes.json";
import { decodeAuthenticatedContent } from "../../src/authenticatedContent";
import { createConfirmedHash, createInterimHash } from "../../src/transcriptHash";
for (const [index, x] of json.entries()) {
    test(`transcript-hashes test vectors ${index}`, async () => {
        const impl = await getCiphersuiteImpl(getCiphersuiteFromId(x.cipher_suite));
        await testTranscriptHash(x.authenticated_content, x.confirmation_key, x.confirmed_transcript_hash_after, x.interim_transcript_hash_after, x.interim_transcript_hash_before, impl);
    });
}
async function testTranscriptHash(authenticatedContent, confirmationKey, confirmedHashAfter, interimHashAfter, interimHashBefore, impl) {
    const auth = decodeAuthenticatedContent(hexToBytes(authenticatedContent), 0);
    if (auth === undefined || auth[0].content.contentType !== "commit" || auth[0].auth.contentType !== "commit") {
        throw new Error("Could not decode authenticated content");
    }
    const confirmationTag = auth[0].auth.confirmationTag;
    const verified = await impl.hash.verifyMac(hexToBytes(confirmationKey), confirmationTag, hexToBytes(confirmedHashAfter));
    expect(verified).toBe(true);
    const input = { wireformat: auth[0].wireformat, content: auth[0].content, signature: auth[0].auth.signature };
    const computedConfirmedHash = await createConfirmedHash(hexToBytes(interimHashBefore), input, impl.hash);
    expect(computedConfirmedHash).toStrictEqual(hexToBytes(confirmedHashAfter));
    const computedInterimHash = await createInterimHash(hexToBytes(confirmedHashAfter), confirmationTag, impl.hash);
    expect(computedInterimHash).toStrictEqual(hexToBytes(interimHashAfter));
}
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