Function verifyDetachedSignature

src/modules/pgpModel.js:274–292

({plaintext, senderAddress, detachedSignature, keyringId, lookupKey})

}

export async function verifyDetachedSignature({plaintext, senderAddress, detachedSignature, keyringId, lookupKey}) {
  try {
    const keyring = await getPreferredKeyring(keyringId);
    // determine issuer key id
    const signature = await readSignature({armoredSignature: detachedSignature});
    const sigPackets = signature.packets.filterByTag(enums.packet.signature);
    const issuerKeyIDs = sigPackets.map(sigPacket => sigPacket.issuerKeyID);
    // sync keys to preferred keyring
    await syncPublicKeys({keyring, keyIds: issuerKeyIDs, keyringId});
    // check if we have signing keys in local keyring and if not try key discovery
    await Promise.all(issuerKeyIDs.map(keyId => acquireSigningKeys({senderAddress, keyring, lookupKey, keyId})));
    const {signatures} = await keyring.getPgpBackend().verify({plaintext, detachedSignature, keyring});
    await updateKeyBinding(keyring, senderAddress, signatures);
    await addSignatureDetails({signatures, keyring, senderAddress});
    return {signatures};
  } catch (e) {
    throw new MvError(l10n.get('verify_error', [e]), 'VERIFY_ERROR');
  }
}

async function acquireSigningKeys({senderAddress, keyring, lookupKey, keyId}) {
  let {[senderAddress]: signerKeys} = await keyring.getKeyByAddress(senderAddress, {keyId});