153 lines
4.2 KiB
Ruby
153 lines
4.2 KiB
Ruby
# Check a user's access to perform a git action. All public methods in this
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# class return an instance of `GitlabAccessStatus`
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module Gitlab
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class GitAccess
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DOWNLOAD_COMMANDS = %w{ git-upload-pack git-upload-archive }
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PUSH_COMMANDS = %w{ git-receive-pack }
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attr_reader :actor, :project, :protocol, :user_access, :authentication_abilities
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def initialize(actor, project, protocol, authentication_abilities:)
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@actor = actor
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@project = project
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@protocol = protocol
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@authentication_abilities = authentication_abilities
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@user_access = UserAccess.new(user, project: project)
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end
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def check(cmd, changes)
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return build_status_object(false, "Git access over #{protocol.upcase} is not allowed") unless protocol_allowed?
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unless actor
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return build_status_object(false, "No user or key was provided.")
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end
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if user && !user_access.allowed?
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return build_status_object(false, "Your account has been blocked.")
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end
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unless project && (user_access.can_read_project? || deploy_key_can_read_project?)
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return build_status_object(false, 'The project you were looking for could not be found.')
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end
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case cmd
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when *DOWNLOAD_COMMANDS
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download_access_check
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when *PUSH_COMMANDS
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push_access_check(changes)
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else
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build_status_object(false, "The command you're trying to execute is not allowed.")
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end
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end
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def download_access_check
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if user
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user_download_access_check
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elsif deploy_key
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build_status_object(true)
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else
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raise 'Wrong actor'
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end
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end
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def push_access_check(changes)
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if user
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user_push_access_check(changes)
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elsif deploy_key
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build_status_object(false, "Deploy keys are not allowed to push code.")
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else
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raise 'Wrong actor'
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end
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end
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def user_download_access_check
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unless user_can_download_code? || build_can_download_code?
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return build_status_object(false, "You are not allowed to download code from this project.")
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end
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build_status_object(true)
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end
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def user_can_download_code?
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authentication_abilities.include?(:download_code) && user_access.can_do_action?(:download_code)
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end
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def build_can_download_code?
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authentication_abilities.include?(:build_download_code) && user_access.can_do_action?(:build_download_code)
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end
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def user_push_access_check(changes)
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unless authentication_abilities.include?(:push_code)
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return build_status_object(false, "You are not allowed to upload code for this project.")
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end
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if changes.blank?
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return build_status_object(true)
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end
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unless project.repository.exists?
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return build_status_object(false, "A repository for this project does not exist yet.")
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end
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changes_list = Gitlab::ChangesList.new(changes)
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# Iterate over all changes to find if user allowed all of them to be applied
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changes_list.each do |change|
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status = change_access_check(change)
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unless status.allowed?
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# If user does not have access to make at least one change - cancel all push
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return status
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end
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end
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build_status_object(true)
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end
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def change_access_check(change)
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Checks::ChangeAccess.new(change, user_access: user_access, project: project).exec
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end
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def protocol_allowed?
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Gitlab::ProtocolAccess.allowed?(protocol)
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end
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private
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def matching_merge_request?(newrev, branch_name)
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Checks::MatchingMergeRequest.new(newrev, branch_name, project).match?
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end
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def deploy_key
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actor if actor.is_a?(DeployKey)
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end
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def deploy_key_can_read_project?
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if deploy_key
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return true if project.public?
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deploy_key.projects.include?(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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protected
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def user
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return @user if defined?(@user)
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@user =
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case actor
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when User
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actor
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when DeployKey
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nil
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when Key
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actor.user
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end
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end
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def build_status_object(status, message = '')
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Gitlab::GitAccessStatus.new(status, message)
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end
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end
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end
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