debian-mirror-gitlab/app/services/auth/container_registry_authentication_service.rb

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module Auth
class ContainerRegistryAuthenticationService < BaseService
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AUDIENCE = 'container_registry'.freeze
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def execute(authentication_abilities:)
@authentication_abilities = authentication_abilities
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return error('UNAVAILABLE', status: 404, message: 'registry not enabled') unless registry.enabled
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unless scope || current_user || project
return error('DENIED', status: 403, message: 'access forbidden')
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end
{ token: authorized_token(scope).encoded }
end
def self.full_access_token(*names)
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names = names.flatten
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registry = Gitlab.config.registry
token = JSONWebToken::RSAToken.new(registry.key)
token.issuer = registry.issuer
token.audience = AUDIENCE
token.expire_time = token_expire_at
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token[:access] = names.map do |name|
{ type: 'repository', name: name, actions: %w(*) }
end
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token.encoded
end
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def self.token_expire_at
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Time.now + Gitlab::CurrentSettings.container_registry_token_expire_delay.minutes
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end
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private
def authorized_token(*accesses)
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JSONWebToken::RSAToken.new(registry.key).tap do |token|
token.issuer = registry.issuer
token.audience = params[:service]
token.subject = current_user.try(:username)
token.expire_time = self.class.token_expire_at
token[:access] = accesses.compact
end
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end
def scope
return unless params[:scope]
@scope ||= process_scope(params[:scope])
end
def process_scope(scope)
type, name, actions = scope.split(':', 3)
actions = actions.split(',')
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case type
when 'registry'
process_registry_access(type, name, actions)
when 'repository'
path = ContainerRegistry::Path.new(name)
process_repository_access(type, path, actions)
end
end
def process_registry_access(type, name, actions)
return unless current_user&.admin?
return unless name == 'catalog'
return unless actions == ['*']
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{ type: type, name: name, actions: ['*'] }
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end
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def process_repository_access(type, path, actions)
return unless path.valid?
requested_project = path.repository_project
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return unless requested_project
actions = actions.select do |action|
can_access?(requested_project, action)
end
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return unless actions.present?
# At this point user/build is already authenticated.
#
ensure_container_repository!(path, actions)
{ type: type, name: path.to_s, actions: actions }
end
##
# Because we do not have two way communication with registry yet,
# we create a container repository image resource when push to the
# registry is successfuly authorized.
#
def ensure_container_repository!(path, actions)
return if path.has_repository?
return unless actions.include?('push')
ContainerRepository.create_from_path!(path)
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end
def can_access?(requested_project, requested_action)
return false unless requested_project.container_registry_enabled?
case requested_action
when 'pull'
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build_can_pull?(requested_project) || user_can_pull?(requested_project) || deploy_token_can_pull?(requested_project)
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when 'push'
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build_can_push?(requested_project) || user_can_push?(requested_project)
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when '*'
user_can_admin?(requested_project)
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else
false
end
end
def registry
Gitlab.config.registry
end
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def can_user?(ability, project)
user = current_user.is_a?(User) ? current_user : nil
can?(user, ability, project)
end
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def build_can_pull?(requested_project)
# Build can:
# 1. pull from its own project (for ex. a build)
# 2. read images from dependent projects if creator of build is a team member
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has_authentication_ability?(:build_read_container_image) &&
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(requested_project == project || can_user?(:build_read_container_image, requested_project))
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end
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def user_can_admin?(requested_project)
has_authentication_ability?(:admin_container_image) &&
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can_user?(:admin_container_image, requested_project)
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end
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def user_can_pull?(requested_project)
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has_authentication_ability?(:read_container_image) &&
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can_user?(:read_container_image, requested_project)
end
def deploy_token_can_pull?(requested_project)
has_authentication_ability?(:read_container_image) &&
current_user.is_a?(DeployToken) &&
current_user.has_access_to?(requested_project) &&
current_user.read_registry?
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end
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##
# We still support legacy pipeline triggers which do not have associated
# actor. New permissions model and new triggers are always associated with
# an actor, so this should be improved in 10.0 version of GitLab.
#
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def build_can_push?(requested_project)
# Build can push only to the project from which it originates
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has_authentication_ability?(:build_create_container_image) &&
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requested_project == project
end
def user_can_push?(requested_project)
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has_authentication_ability?(:create_container_image) &&
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can_user?(:create_container_image, requested_project)
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end
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def error(code, status:, message: '')
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{ errors: [{ code: code, message: message }], http_status: status }
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end
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def has_authentication_ability?(capability)
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@authentication_abilities.to_a.include?(capability)
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end
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end
end