Discourse as SSO Provider: Login Error

sso
1

I’m following this guide here:

I am providing the correct signature, however for some reason discourse is not accepting it.

Here is the URL I am hitting:

Here is the error log for it:

Message

Verbose SSO log: Signature parse error

Bad signature for payload 

sso: redacted

sig: ae997097f358b7e08aa0568290b55ef6e2174077e96a1184153b1d8369d50f8

expected sig: ae997097f358b7e08aa0568290b55ef6e2174077e96a1184153b1d08369d50f8



Backtrace

/var/www/discourse/app/controllers/session_controller.rb:52:in `rescue in sso_provider'
/var/www/discourse/app/controllers/session_controller.rb:41:in `sso_provider'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.2.2/lib/action_controller/metal/basic_implicit_render.rb:6:in `send_action'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.2.2/lib/abstract_controller/base.rb:196:in `process_action'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.2.2/lib/action_controller/metal/rendering.rb:30:in `process_action'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.2.2/lib/abstract_controller/callbacks.rb:42:in `block in process_action'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activesupport-6.0.2.2/lib/active_support/callbacks.rb:135:in `run_callbacks'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.2.2/lib/abstract_controller/callbacks.rb:41:in `process_action'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.2.2/lib/action_controller/metal/rescue.rb:22:in `process_action'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.2.2/lib/action_controller/metal/instrumentation.rb:33:in `block in process_action'

Env

HTTP HOSTS: discuss.bevry.me

Here is the settings:

Screen Shot 2020-04-28 at 7.33.09 pm
Screen Shot 2020-04-28 at 7.33.09 pm1662×900 105 KB

Here is the code for the cloudflare worker:

redacted - will open-source later

However, this could be on our side, as there is a difference between:

  • ae997097f358b7e08aa0568290b55ef6e2174077e96a1184153b1d8369d50f8
  • ae997097f358b7e08aa0568290b55ef6e2174077e96a1184153b1d08369d50f8

Although I am not sure how to resolve that.

2

Okay using this method solved it:

// https://jameshfisher.com/2017/10/31/web-cryptography-api-hmac/
// https://stackoverflow.com/questions/40031688/javascript-arraybuffer-to-hex
export function buf2hex(buffer: ArrayBuffer): string {
	return Array.prototype.map
		.call(new Uint8Array(buffer), (x) => ('00' + x.toString(16)).slice(-2))
		.join('')
}
2 Likes
3

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