Module: Legion::API::Routes::AuthHuman

Defined in:
lib/legion/api/auth_human.rb

Class Method Summary collapse

Class Method Details

.exchange_code(entra, code) ⇒ Object 



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# File 'lib/legion/api/auth_human.rb', line 28

def self.exchange_code(entra, code)
  uri = URI("https://login.microsoftonline.com/#{entra[:tenant_id]}/oauth2/v2.0/token")
  response = Net::HTTP.post_form(uri, {
                                   'client_id'     => entra[:client_id],
                                   'client_secret' => entra[:client_secret],
                                   'code'          => code,
                                   'redirect_uri'  => entra[:redirect_uri],
                                   'grant_type'    => 'authorization_code'
                                 })

  return nil unless response.is_a?(Net::HTTPSuccess)

  Legion::JSON.load(response.body)
rescue StandardError => e
  Legion::Logging.warn "AuthHuman#exchange_code failed: #{e.message}" if defined?(Legion::Logging)
  nil
end

.register_authorize(app) ⇒ Object 



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# File 'lib/legion/api/auth_human.rb', line 46

def self.register_authorize(app)
  app.get '/api/auth/authorize' do
    entra = Routes::AuthHuman.resolve_entra_settings
    unless entra[:tenant_id] && entra[:client_id]
      Legion::Logging.error 'API GET /api/auth/authorize returned 500: Entra OAuth settings are missing'
      halt 500, json_error('entra_not_configured', 'Entra OAuth settings are missing', status_code: 500)
    end

    state = Legion::Crypt::JWT.issue(
      { nonce: SecureRandom.hex(16), purpose: 'oauth_state' },
      ttl: 300
    )

    query = URI.encode_www_form({
                                  'client_id'     => entra[:client_id],
                                  'redirect_uri'  => entra[:redirect_uri],
                                  'response_type' => 'code',
                                  'scope'         => 'openid profile',
                                  'state'         => state
                                })

    redirect "https://login.microsoftonline.com/#{entra[:tenant_id]}/oauth2/v2.0/authorize?#{query}"
  end
end

.register_callback(app) ⇒ Object

rubocop:disable Metrics/AbcSize, Metrics/MethodLength



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# File 'lib/legion/api/auth_human.rb', line 71

def self.register_callback(app) # rubocop:disable Metrics/AbcSize, Metrics/MethodLength
  app.get '/api/auth/callback' do
    entra = Routes::AuthHuman.resolve_entra_settings
    unless entra[:tenant_id] && entra[:client_id]
      Legion::Logging.error 'API GET /api/auth/callback returned 500: Entra OAuth settings are missing'
      halt 500, json_error('entra_not_configured', 'Entra OAuth settings are missing', status_code: 500)
    end

    if params[:error]
      Legion::Logging.warn "API GET /api/auth/callback returned 400: #{params[:error_description] || params[:error]}"
      halt 400, json_error('oauth_error', params[:error_description] || params[:error], status_code: 400)
    end
    unless params[:code]
      Legion::Logging.warn 'API GET /api/auth/callback returned 400: authorization code is required'
      halt 400, json_error('missing_code', 'authorization code is required', status_code: 400)
    end

    if params[:state]
      begin
        Legion::Crypt::JWT.verify(params[:state])
      rescue Legion::Crypt::JWT::Error
        Legion::Logging.warn 'API GET /api/auth/callback returned 400: CSRF state token is invalid or expired'
        halt 400, json_error('invalid_state', 'CSRF state token is invalid or expired', status_code: 400)
      end
    end

    token_response = Routes::AuthHuman.exchange_code(entra, params[:code])
    unless token_response
      Legion::Logging.error 'API GET /api/auth/callback returned 502: Failed to exchange code for tokens'
      halt 502, json_error('token_exchange_failed', 'Failed to exchange code for tokens', status_code: 502)
    end

    id_token = token_response[:id_token] || token_response['id_token']
    unless id_token
      Legion::Logging.error 'API GET /api/auth/callback returned 502: Entra did not return an id_token'
      halt 502, json_error('no_id_token', 'Entra did not return an id_token', status_code: 502)
    end

    jwks_url = "https://login.microsoftonline.com/#{entra[:tenant_id]}/discovery/v2.0/keys"
    issuer = "https://login.microsoftonline.com/#{entra[:tenant_id]}/v2.0"

    begin
      claims = Legion::Crypt::JWT.verify_with_jwks(id_token, jwks_url: jwks_url, issuers: [issuer])
    rescue Legion::Crypt::JWT::Error => e
      Legion::Logging.warn "API GET /api/auth/callback returned 401: #{e.message}"
      halt 401, json_error('invalid_id_token', e.message, status_code: 401)
    end

    unless defined?(Legion::Rbac::EntraClaimsMapper)
      halt 501, json_error('claims_mapper_not_available', 'EntraClaimsMapper is not loaded', status_code: 501)
    end

    mapped = Legion::Rbac::EntraClaimsMapper.map_claims(
      claims,
      role_map:     entra[:role_map] || Legion::Rbac::EntraClaimsMapper::DEFAULT_ROLE_MAP,
      group_map:    entra[:group_map] || {},
      default_role: entra[:default_role] || 'worker'
    )

    ttl = 28_800
    token = Legion::API::Token.issue_human_token(
      msid: mapped[:sub], name: mapped[:name], roles: mapped[:roles], ttl: ttl
    )

    Legion::Logging.info "API: human OAuth callback issued token for sub=#{mapped[:sub]}"
    if request.env['HTTP_ACCEPT']&.include?('application/json')
      json_response({
                      access_token: token,
                      token_type:   'Bearer',
                      expires_in:   ttl,
                      roles:        mapped[:roles],
                      name:         mapped[:name]
                    })
    else
      redirect_url = entra[:success_redirect] || '/api/health'
      redirect "#{redirect_url}#access_token=#{token}"
    end
  end
end

.registered(app) ⇒ Object 



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# File 'lib/legion/api/auth_human.rb', line 10

def self.registered(app)
  register_authorize(app)
  register_callback(app)
end

.resolve_entra_settings ⇒ Object 



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# File 'lib/legion/api/auth_human.rb', line 15

def self.resolve_entra_settings
  return {} unless defined?(Legion::Settings)

  rbac = Legion::Settings[:rbac]
  entra = rbac.is_a?(Hash) ? rbac[:entra] : nil
  return entra if entra.is_a?(Hash)

  {}
rescue StandardError => e
  Legion::Logging.debug "AuthHuman#resolve_entra_settings failed: #{e.message}" if defined?(Legion::Logging)
  {}
end