Examples with RequestLoadPublicKey im.actor.core.api.rpc.RequestLoadPublicKey used on opensource projects

Example 1 with RequestLoadPublicKey

use of im.actor.core.api.rpc.RequestLoadPublicKey in project actor-platform by actorapp.

the class KeyManagerActor method fetchUserPreKey.

/**
 * Fetching user's pre key by key id
 *
 * @param uid        User's id
 * @param keyGroupId User's key group id
 * @param keyId      Key id
 */
private Promise<PublicKey> fetchUserPreKey(final int uid, final int keyGroupId, final long keyId) {
    User user = users().getValue(uid);
    if (user == null) {
        throw new RuntimeException("Unable to find user #" + uid);
    }
    return pickUserGroup(uid, keyGroupId).flatMap(new Function<Tuple2<UserKeysGroup, UserKeys>, Promise<PublicKey>>() {

        @Override
        public Promise<PublicKey> apply(final Tuple2<UserKeysGroup, UserKeys> keysGroup) {
            for (PublicKey p : keysGroup.getT1().getEphemeralKeys()) {
                if (p.getKeyId() == keyId) {
                    return Promise.success(p);
                }
            }
            // 
            // Downloading pre key
            // 
            ArrayList<Long> ids = new ArrayList<Long>();
            ids.add(keyId);
            final UserKeysGroup finalKeysGroup = keysGroup.getT1();
            return api(new RequestLoadPublicKey(new ApiUserOutPeer(uid, getUser(uid).getAccessHash()), keyGroupId, ids)).map(new Function<ResponsePublicKeys, PublicKey>() {

                @Override
                public PublicKey apply(ResponsePublicKeys responsePublicKeys) {
                    if (responsePublicKeys.getPublicKey().size() == 0) {
                        throw new RuntimeException("Unable to find public key on server");
                    }
                    ApiEncryptionKeySignature sig = null;
                    for (ApiEncryptionKeySignature s : responsePublicKeys.getSignatures()) {
                        if (s.getKeyId() == keyId && "Ed25519".equals(s.getSignatureAlg())) {
                            sig = s;
                            break;
                        }
                    }
                    if (sig == null) {
                        throw new RuntimeException("Unable to find public key on server");
                    }
                    ApiEncryptionKey key = responsePublicKeys.getPublicKey().get(0);
                    byte[] keyHash = RatchetKeySignature.hashForSignature(key.getKeyId(), key.getKeyAlg(), key.getKeyMaterial());
                    if (!Curve25519.verifySignature(keysGroup.getT1().getIdentityKey().getPublicKey(), keyHash, sig.getSignature())) {
                        throw new RuntimeException("Key signature does not isMatch");
                    }
                    PublicKey pkey = new PublicKey(keyId, key.getKeyAlg(), key.getKeyMaterial());
                    UserKeysGroup userKeysGroup = finalKeysGroup.addPublicKey(pkey);
                    cacheUserKeys(keysGroup.getT2().removeUserKeyGroup(userKeysGroup.getKeyGroupId()).addUserKeyGroup(userKeysGroup));
                    return pkey;
                }
            });
        }
    });
}