Examples with Decrypt me.retrodaredevil.solarthing.packets.security.crypto.Decrypt used on opensource projects

Example 1 with Decrypt

use of me.retrodaredevil.solarthing.packets.security.crypto.Decrypt in project solarthing by wildmountainfarms.

the class AlterManagerAction method isDocumentMadeByUs.

private boolean isDocumentMadeByUs(Instant now, ScheduledCommandData scheduledCommandData, StoredPacketGroup existingDocument) {
    LargeIntegrityPacket largeIntegrityPacket = (LargeIntegrityPacket) existingDocument.getPackets().stream().filter(p -> p instanceof LargeIntegrityPacket).findAny().orElse(null);
    if (largeIntegrityPacket == null) {
        LOGGER.warn(SolarThingConstants.SUMMARY_MARKER, "The stored document did not have a LargeIntegrity packet. Someone must be trying to stop a scheduled command!");
        return false;
    }
    String sender = largeIntegrityPacket.getSender();
    if (!commandManager.getSender().equals(sender)) {
        LOGGER.info(SolarThingConstants.SUMMARY_MARKER, "The sender of the large integrity packet we are inspecting is not us (" + commandManager.getSender() + "). It is " + sender + ". Might be a malicious actor, might be a bad setup.");
        return false;
    }
    String encryptedHash = largeIntegrityPacket.getEncryptedHash();
    String data;
    try {
        synchronized (CIPHER) {
            data = Decrypt.decrypt(CIPHER, commandManager.getKeyPair().getPublic(), encryptedHash);
        }
    } catch (InvalidKeyException e) {
        throw new RuntimeException("Should be a valid key!", e);
    } catch (DecryptException e) {
        LOGGER.warn(SolarThingConstants.SUMMARY_MARKER, "The document we are inspecting had a large integrity packet with the sender: " + sender + ", but that's us and we couldn't decrypt their payload. Likely a malicious actor", e);
        return false;
    }
    final String[] split = data.split(",", 2);
    LOGGER.debug("decrypted data: " + data);
    if (split.length != 2) {
        LOGGER.warn(SolarThingConstants.SUMMARY_MARKER, "split.length: " + split.length + " split: " + Arrays.asList(split));
        return false;
    }
    String hexMillis = split[0];
    // String message = split[1]; We don't care what the message is. We don't even care enough to check if it matches the payload's hash
    long dateMillis;
    try {
        dateMillis = Long.parseLong(hexMillis, 16);
    } catch (NumberFormatException e) {
        LOGGER.error(SolarThingConstants.SUMMARY_MARKER, "Error parsing hex date millis", e);
        return false;
    }
    if (dateMillis < scheduledCommandData.getScheduledTimeMillis()) {
        LOGGER.warn(SolarThingConstants.SUMMARY_MARKER, "The dateMillis for this is less than the command's scheduled execution time! This must be a malicious actor!");
        return false;
    }
    if (dateMillis > now.toEpochMilli()) {
        LOGGER.warn(SolarThingConstants.SUMMARY_MARKER, "The dateMillis for this is greater than now! This should never ever happen.");
        return false;
    }
    return true;
}