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# frozen_string_literal: true
class JiraConnect::ApplicationController < ApplicationController
include Gitlab::Utils::StrongMemoize
skip_before_action :authenticate_user!
skip_before_action :verify_authenticity_token
before_action :verify_atlassian_jwt!
feature_category :integrations
attr_reader :current_jira_installation
private
def verify_atlassian_jwt!
return render_403 unless atlassian_jwt_valid?
@current_jira_installation = installation_from_jwt
end
def verify_qsh_claim!
payload, _ = decode_auth_token!
# Make sure `qsh` claim matches the current request
render_403 unless payload['qsh'] == Atlassian::Jwt.create_query_string_hash(request.url, request.method, jira_connect_base_url)
rescue StandardError
render_403
end
def atlassian_jwt_valid?
return false unless installation_from_jwt
# Verify JWT signature with our stored `shared_secret`
decode_auth_token!
rescue JWT::DecodeError
false
end
def installation_from_jwt
strong_memoize(:installation_from_jwt) do
next unless claims['iss']
JiraConnectInstallation.find_by_client_key(claims['iss'])
end
end
def claims
strong_memoize(:claims) do
next {} unless auth_token
# Decode without verification to get `client_key` in `iss`
payload, _ = Atlassian::Jwt.decode(auth_token, nil, false)
payload
end
end
def jira_user
strong_memoize(:jira_user) do
next unless installation_from_jwt
next unless claims['sub']
# This only works for Jira Cloud installations.
installation_from_jwt.client.user_info(claims['sub'])
end
end
def decode_auth_token!
Atlassian::Jwt.decode(auth_token, installation_from_jwt.shared_secret)
end
def auth_token
strong_memoize(:auth_token) do
params[:jwt] || request.headers['Authorization']&.split(' ', 2)&.last
end
end
end
|
