Split docker authentication service
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parent
105017c308
commit
011a905a82
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@ -2,6 +2,10 @@ class JwtController < ApplicationController
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skip_before_action :authenticate_user!
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skip_before_action :verify_authenticity_token
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SERVICES = {
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'docker' => Jwt::DockerAuthenticationService,
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}
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def auth
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@authenticated = authenticate_with_http_basic do |login, password|
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@ci_project = ci_project(login, password)
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@ -9,46 +13,22 @@ class JwtController < ApplicationController
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end
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unless @authenticated
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return render_403 if has_basic_credentials?
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head :forbidden if ActionController::HttpAuthentication::Basic.has_basic_credentials?(request)
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end
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case params[:service]
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when 'docker'
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docker_token_auth(params[:scope], params[:offline_token])
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else
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return render_404
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end
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service = SERVICES[params[:service]]
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head :not_found unless service
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result = service.new(@ci_project, @user, auth_params).execute
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return head result[:http_status] if result[:http_status]
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render json: result
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end
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private
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def render_400
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head :invalid_request
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end
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def render_404
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head :not_found
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end
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def render_403
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head :forbidden
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end
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def docker_token_auth(scope, offline_token)
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payload = {
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aud: params[:service],
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sub: @user.try(:username)
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}
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if offline_token
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return render_403 unless @user
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elsif scope
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access = process_access(scope)
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return render_404 unless access
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payload[:access] = [access]
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end
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render json: { token: encode(payload) }
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def auth_params
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params.permit(:service, :scope, :offline_token, :account, :client_id)
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end
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def ci_project(login, password)
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@ -102,72 +82,4 @@ class JwtController < ApplicationController
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user
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end
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def process_access(scope)
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type, name, actions = scope.split(':', 3)
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actions = actions.split(',')
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case type
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when 'repository'
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process_repository_access(type, name, actions)
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end
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end
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def process_repository_access(type, name, actions)
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project = Project.find_with_namespace(name)
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return unless project
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actions = actions.select do |action|
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can_access?(project, action)
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end
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{ type: 'repository', name: name, actions: actions } if actions
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end
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def default_payload
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{
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aud: 'docker',
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sub: @user.try(:username),
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aud: params[:service],
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}
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end
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def private_key
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@private_key ||= OpenSSL::PKey::RSA.new File.read Gitlab.config.registry.key
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end
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def encode(payload)
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issued_at = Time.now
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payload = payload.merge(
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iss: Gitlab.config.registry.issuer,
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iat: issued_at.to_i,
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nbf: issued_at.to_i - 5.seconds.to_i,
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exp: issued_at.to_i + 60.minutes.to_i,
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jti: SecureRandom.uuid,
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)
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headers = {
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kid: kid(private_key)
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}
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JWT.encode(payload, private_key, 'RS256', headers)
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end
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def can_access?(project, action)
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case action
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when 'pull'
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project == @ci_project || can?(@user, :download_code, project)
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when 'push'
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project == @ci_project || can?(@user, :push_code, project)
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else
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false
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end
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end
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def kid(private_key)
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sha256 = Digest::SHA256.new
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sha256.update(private_key.public_key.to_der)
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payload = StringIO.new(sha256.digest).read(30)
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Base32.encode(payload).split('').each_slice(4).each_with_object([]) do |slice, mem|
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mem << slice.join
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end.join(':')
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end
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end
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@ -0,0 +1,65 @@
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module Jwt
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class DockerAuthenticationService < BaseService
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def execute
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if params[:offline_token]
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return error('forbidden', 403) unless current_user
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end
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{ token: token.encoded }
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end
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private
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def token
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token = ::Jwt::RSAToken.new(registry.key)
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token.issuer = registry.issuer
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token.audience = params[:service]
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token.subject = current_user.try(:username)
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token[:access] = access
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token
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end
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def access
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return unless params[:scope]
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scope = process_scope(params[:scope])
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[scope].compact
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end
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def process_scope(scope)
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type, name, actions = scope.split(':', 3)
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actions = actions.split(',')
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case type
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when 'repository'
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process_repository_access(type, name, actions)
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end
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end
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def process_repository_access(type, name, actions)
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current_project = Project.find_with_namespace(name)
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return unless current_project
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actions = actions.select do |action|
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can_access?(current_project, action)
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end
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{ type: type, name: name, actions: actions } if actions
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end
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def can_access?(current_project, action)
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case action
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when 'pull'
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current_project == project || can?(current_user, :download_code, current_project)
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when 'push'
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current_project == project || can?(current_user, :push_code, current_project)
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else
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false
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end
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end
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def registry
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Gitlab.config.registry
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end
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end
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end
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@ -0,0 +1,36 @@
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module Jwt
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class RSAToken < Token
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attr_reader :key_file
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def initialize(key_file)
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super()
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@key_file = key_file
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end
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def encoded
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headers = {
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kid: kid
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}
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JWT.encode(payload, key, 'RS256', headers)
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end
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private
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def key_data
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@key_data ||= File.read(key_file)
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end
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def key
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@key ||= OpenSSL::PKey::RSA.new(key_data)
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end
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def kid
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sha256 = Digest::SHA256.new
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sha256.update(key.public_key.to_der)
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payload = StringIO.new(sha256.digest).read(30)
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Base32.encode(payload).split('').each_slice(4).each_with_object([]) do |slice, mem|
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mem << slice.join
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end.join(':')
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end
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end
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end
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@ -0,0 +1,48 @@
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module Jwt
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class Token
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attr_accessor :issuer, :subject, :audience, :id
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attr_accessor :issued_at, :not_before, :expire_time
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def initialize
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@payload = {}
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@id = SecureRandom.uuid
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@issued_at = Time.now
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@not_before = issued_at - 5.seconds
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@expire_time = issued_at + 1.minute
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end
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def [](key)
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@payload[key]
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end
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def []=(key, value)
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@payload[key] = value
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end
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def encoded
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raise NotImplementedError
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end
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def payload
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@payload.merge(default_payload)
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end
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def to_json
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payload.to_json
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end
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private
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def default_payload
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{
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jti: id,
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aud: audience,
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sub: subject,
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iss: issuer,
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iat: issued_at.to_i,
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nbf: not_before.to_i,
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exp: expire_time.to_i
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}.compact
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end
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end
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end
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