🔑 Ruby OAuth

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OAuth 1.0a is an industry-standard protocol for authorization.

This is a RubyGem for implementing both OAuth 1.0a clients and servers in Ruby applications. See the sibling oauth2 gem for OAuth 2.0, 2.1, & OIDC clients in Ruby.

• OAuth 1.0 Spec
• oauth2 sibling gem for OAuth 2.0 implementations in Ruby.

This gem targets the OAuth 1.0a behavior (the errata that became RFC 5849), while maintaining compatibility with providers that still behave like classic 1.0. Here are the key lines between the two and how this gem handles them:

• oauth_callback
  • 1.0: Optional in practice; some providers accepted flows without it.
  • 1.0a: Consumer SHOULD send oauth_callback when obtaining a Request Token, or explicitly use the out-of-band value "oob".
  • This gem: If you do not pass oauth_callback, we default it to "oob" (OUT_OF_BAND). You can opt-out by passing exclude_callback: true.
• oauth_callback_confirmed
  • 1.0: Not specified.
  • 1.0a: Service Provider MUST return oauth_callback_confirmed=true with the Request Token response. This mitigates session fixation.
  • This gem: Parses token responses but does not include oauth_callback_confirmed in the signature base string (it is a response param, not a signed request param).
• oauth_verifier
  • 1.0: Not present.
  • 1.0a: After the user authorizes, the Provider returns an oauth_verifier to the Consumer, and the Consumer MUST include it when exchanging the Request Token for an Access Token.
  • This gem: Supports oauth_verifier across request helpers and request proxies; pass oauth_verifier to get_access_token in 3‑legged flows.

Practical guidance:

• For 3‑legged flows, always supply oauth_callback when calling consumer.get_request_token, and include oauth_verifier when calling request_token.get_access_token.
• For command‑line or non-HTTP clients, use the special OUT_OF_BAND value ("oob") as the oauth_callback and prompt the user to paste back the displayed verifier.

References: RFC 5849 (OAuth 1.0), sections 5–7; 1.0a security errata.

OAuth Ruby has been maintained by a large number of talented individuals over the years. The primary maintainer since 2020 is Peter Boling (@pboling).

Tokens to Remember
Works with JRuby
Works with Truffle Ruby
Works with MRI Ruby 3
Works with MRI Ruby 2
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... 💖	🧊 🐙 🛖 🧪

Compatible with MRI Ruby 2.3+, and concordant releases of JRuby, and TruffleRuby.

Federated DVCS Repository	Status	Issues	PRs	Wiki	CI	Discussions
🧪 ruby-oauth/oauth on GitLab	The Truth	💚	💚	💚	🏀 Tiny Matrix	➖
🧊 ruby-oauth/oauth on CodeBerg	An Ethical Mirror (Donate)	💚	💚	➖	⭕️ No Matrix	➖
🐙 ruby-oauth/oauth on GitHub	Another Mirror	💚	💚	➖	💯 Full Matrix	💚
🎮️ Discord Server		Let's	talk	about	this	library!

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Alternatively:

Install the gem and add to the application's Gemfile by executing:

bundle add oauth

If bundler is not being used to manage dependencies, install the gem by executing:

gem install oauth

This gem is cryptographically signed, and has verifiable SHA-256 and SHA-512 checksums by stone_checksums. Be sure the gem you install hasn’t been tampered with by following the instructions below.

Add my public key (if you haven’t already, expires 2045-04-29) as a trusted certificate:

gem cert --add <(curl -Ls https://raw.github.com/galtzo-floss/certs/main/pboling.pem)

You only need to do that once. Then proceed to install with:

gem install oauth -P HighSecurity

The HighSecurity trust profile will verify signed gems, and not allow the installation of unsigned dependencies.

If you want to up your security game full-time:

bundle config set --global trust-policy MediumSecurity

MediumSecurity instead of HighSecurity is necessary if not all the gems you use are signed.

NOTE: Be prepared to track down certs for signed gems and add them the same way you added mine.

This is a ruby library which is intended to be used in creating Ruby Consumer and Service Provider applications. It is NOT a Rails plugin, but could easily be used for the foundation for such a Rails plugin.

This gem was originally extracted from @pelle's oauth-plugin gem. After extraction that gem was made to depend on this gem.

Unfortunately, this gem does have some Rails related bits that are optional to load. You don't need Rails! The Rails bits may be pulled out into a separate gem with the 1.x minor updates of this gem.

• oauth-tty (on Gitlab) (rubygems.org)

We need to specify the oauth_callback url explicitly, otherwise it defaults to "oob" (Out of Band)

callback_url = "http://127.0.0.1:3000/oauth/callback"

Create a new OAuth::Consumer instance by passing it a configuration hash:

oauth_consumer = OAuth::Consumer.new("key", "secret", site: "https://agree2")

Start the process by requesting a token

request_token = oauth_consumer.get_request_token(oauth_callback: callback_url)

session[:token] = request_token.token
session[:token_secret] = request_token.secret
redirect_to request_token.authorize_url(oauth_callback: callback_url)

When user returns create an access_token

hash = {oauth_token: session[:token], oauth_token_secret: session[:token_secret]}
request_token = OAuth::RequestToken.from_hash(oauth_consumer, hash)
access_token = request_token.get_access_token
# For 3-legged authorization, flow oauth_verifier is passed as param in callback
# access_token = request_token.get_access_token(oauth_verifier: params[:oauth_verifier])
@photos = access_token.get("/photos.xml")

Now that you have an access token, you can use Typhoeus to interact with the OAuth provider if you choose.

require "typhoeus"
require "oauth/request_proxy/typhoeus_request"
oauth_params = {consumer: oauth_consumer, token: access_token}
hydra = Typhoeus::Hydra.new
req = Typhoeus::Request.new(uri, options) # :method needs to be specified in options
oauth_helper = OAuth::Client::Helper.new(req, oauth_params.merge(request_uri: uri))
req.options[:headers]["Authorization"] = oauth_helper.header # Signs the request
hydra.queue(req)
hydra.run
@response = req.response

• RubyDoc Documentation: [![RubyDoc.info][🚎yard-img]][🚎yard]
• Mailing List/Google Group: [![Mailing List][⛳mail-list-img]][⛳mail-list]
• Live Chat on Gitter: [![Join the chat at https://gitter.im/ruby-oauth/oauth-ruby][🏘chat-img]][🏘chat]
• Maintainer's Blog: [![Blog][🚎blog-img]][🚎blog]

While ruby-oauth tools are free software and will always be, the project would benefit immensely from some funding. Raising a monthly budget of... "dollars" would make the project more sustainable.

We welcome both individual and corporate sponsors! We also offer a wide array of funding channels to account for your preferences (although currently Open Collective is our preferred funding platform).

If you're working in a company that's making significant use of ruby-oauth tools we'd appreciate it if you suggest to your company to become a ruby-oauth sponsor.

You can support the development of ruby-oauth tools via GitHub Sponsors, Liberapay, PayPal, Open Collective and Tidelift.

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Support us with a monthly donation and help us continue our activities. [Become a backer]

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How wonderful it is that nobody need wait a single moment before starting to improve the world.
—Anne Frank

I’m driven by a passion to foster a thriving open-source community – a space where people can tackle complex problems, no matter how small. Revitalizing libraries that have fallen into disrepair, and building new libraries focused on solving real-world challenges, are my passions — totaling 79 hours of FLOSS coding over just the past seven days, a pretty regular week for me. I was recently affected by layoffs, and the tech jobs market is unwelcoming. I’m reaching out here because your support would significantly aid my efforts to provide for my family, and my farm (11 🐔 chickens, 2 🐶 dogs, 3 🐰 rabbits, 8 🐈‍ cats).

If you work at a company that uses my work, please encourage them to support me as a corporate sponsor. My work on gems you use might show up in bundle fund.

I’m developing a new library, floss_funding, designed to empower open-source developers like myself to get paid for the work we do, in a sustainable way. Please give it a look.

Floss-Funding.dev: 👉️ No network calls. 👉️ No tracking. 👉️ No oversight. 👉️ Minimal crypto hashing. 💡 Easily disabled nags

See SECURITY.md.

If you need some ideas of where to help, you could work on adding more code coverage, or if it is already 💯 (see below) check reek, issues, or PRs, or use the gem and think about how it could be better.

We so if you make changes, remember to update it.

See CONTRIBUTING.md for more detailed instructions.

See CONTRIBUTING.md.

Everyone interacting with this project's codebases, issue trackers, chat rooms and mailing lists agrees to follow the .

Made with contributors-img.

Also see GitLab Contributors: https://gitlab.com/ruby-oauth/oauth/-/graphs/main

This Library adheres to . Violations of this scheme should be reported as bugs. Specifically, if a minor or patch version is released that breaks backward compatibility, a new version should be immediately released that restores compatibility. Breaking changes to the public API will only be introduced with new major versions.

dropping support for a platform is both obviously and objectively a breaking change
—Jordan Harband (@ljharb, maintainer of SemVer) in SemVer issue 716

I understand that policy doesn't work universally ("exceptions to every rule!"), but it is the policy here. As such, in many cases it is good to specify a dependency on this library using the Pessimistic Version Constraint with two digits of precision.

For example:

spec.add_dependency("oauth", "~> 1.0")

SemVer should, IMO, but doesn't explicitly, say that dropping support for specific Platforms is a breaking change to an API. It is obvious to many, but not all, and since the spec is silent, the bike shedding is endless.

To get a better understanding of how SemVer is intended to work over a project's lifetime, read this article from the creator of SemVer:

• "Major Version Numbers are Not Sacred"

See CHANGELOG.md for a list of releases.

The gem is available as open source under the terms of the MIT License . See LICENSE.txt for the official Copyright Notice.

• Copyright (c) 2023, 2025 Peter H. Boling, of Galtzo.com , and oauth contributors.

Maintainers have teeth and need to pay their dentists. After getting laid off in an RIF in March and filled with many dozens of rejections, I'm now spending ~60+ hours a week building open source tools. I'm hoping to be able to pay for my kids' health insurance this month, so if you value the work I am doing, I need your support. Please consider sponsoring me or the project.

To join the community or get help 👇️ Join the Discord.

To say "thanks!" ☝️ Join the Discord or 👇️ send money.

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Thanks for RTFM. ☺️