https://github.com/thekuwayama/simple_nts_client

Simple NTS(Network Time Security) Client
https://github.com/thekuwayama/simple_nts_client

cli ntp nts ruby

Last synced: about 1 year ago
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Simple NTS(Network Time Security) Client

• Host: GitHub
• URL: https://github.com/thekuwayama/simple_nts_client
• Owner: thekuwayama
• License: mit
• Created: 2019-07-11T21:44:40.000Z (almost 7 years ago)
• Default Branch: master
• Last Pushed: 2021-08-21T22:24:07.000Z (almost 5 years ago)
• Last Synced: 2025-04-23T23:06:22.675Z (about 1 year ago)
• Topics: cli, ntp, nts, ruby
• Language: Ruby
• Homepage:
• Size: 68.4 KB
• Stars: 2
• Watchers: 0
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE.txt

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README

          
# simple_nts_client

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simple\_nts\_client is CLI that is simple NTS(Network Time Security) Client implementation.

This CLI prints the now timestamp got with NTS.

Current implementation is based on:

* https://datatracker.ietf.org/doc/html/rfc8915

## Installation

The gem is available at [rubygems.org](https://rubygems.org/gems/simple_nts_client). You can install it the following:

```sh-session

$ gem install simple_nts_client

```

## Usage

```sh-session

$ simple_nts_client --help

Usage: simple_nts_client [options]

    -s, --server VALUE               NTS-KE server name (default time.cloudflare.com)

    -p, --port VALUE                 NTS-KE port number (default 4460)

    -v, --verbose                    verbose mode       (default false)

```

You can run it the following:

```sh-session

$ simple_nts_client

2020-10-30 20:00:00 +0900

```

If you need to access other NTS-KE server or port, you can run it the following:

```sh-session

$ simple_nts_client --server YOURSERVER --port YOURPORT

2020-10-30 20:00:00 +0900

```

## How "simple" client?

* The CLI supports only `AEAD_AES_SIV_CMAC_256` as AEAD algorithms to protect the NTPv4 packet.

* The CLI sends the first one of the received cookies via the response of the New Cookie for NTPv4 record and discards cookies that didn't send.

* The CLI just prints the timestamp adjusted by calculated system clock offset.

## License

The gem is available as open source under the terms of the [MIT License](http://opensource.org/licenses/MIT).