140 lines
3.9 KiB
Ruby
140 lines
3.9 KiB
Ruby
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 :params, :project, :git_cmd, :user
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def check(actor, cmd, project, changes = nil)
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case cmd
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when *DOWNLOAD_COMMANDS
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download_access_check(actor, project)
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when *PUSH_COMMANDS
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if actor.is_a? User
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push_access_check(actor, project, changes)
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elsif actor.is_a? DeployKey
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return build_status_object(false, "Deploy key not allowed to push")
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elsif actor.is_a? Key
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push_access_check(actor.user, project, changes)
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else
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raise 'Wrong actor'
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end
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else
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return build_status_object(false, "Wrong command")
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end
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end
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def download_access_check(actor, project)
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if actor.is_a?(User)
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user_download_access_check(actor, project)
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elsif actor.is_a?(DeployKey)
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if actor.projects.include?(project)
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build_status_object(true)
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else
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build_status_object(false, "Deploy key not allowed to access this project")
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end
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elsif actor.is_a? Key
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user_download_access_check(actor.user, project)
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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(user, project)
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if user && user_allowed?(user) && user.can?(:download_code, project)
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build_status_object(true)
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else
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build_status_object(false, "You don't have access")
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end
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end
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def push_access_check(user, project, changes)
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unless user && user_allowed?(user)
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return build_status_object(false, "You don't have access")
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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, "Repository does not exist")
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end
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changes = changes.lines if changes.kind_of?(String)
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# Iterate over all changes to find if user allowed all of them to be applied
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changes.each do |change|
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status = change_access_check(user, project, 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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return build_status_object(true)
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end
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def change_access_check(user, project, change)
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oldrev, newrev, ref = change.split(' ')
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action = if project.protected_branch?(branch_name(ref))
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# we dont allow force push to protected branch
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if forced_push?(project, oldrev, newrev)
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:force_push_code_to_protected_branches
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# and we dont allow remove of protected branch
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elsif newrev == Gitlab::Git::BLANK_SHA
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:remove_protected_branches
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else
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:push_code_to_protected_branches
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end
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elsif project.repository.tag_names.include?(tag_name(ref))
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# Prevent any changes to existing git tag unless user has permissions
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:admin_project
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else
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:push_code
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end
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if user.can?(action, project)
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build_status_object(true)
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else
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build_status_object(false, "You don't have permission")
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end
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end
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def forced_push?(project, oldrev, newrev)
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Gitlab::ForcePushCheck.force_push?(project, oldrev, newrev)
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end
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private
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def user_allowed?(user)
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Gitlab::UserAccess.allowed?(user)
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end
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def branch_name(ref)
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ref = ref.to_s
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if ref.start_with?('refs/heads')
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ref.sub(%r{\Arefs/heads/}, '')
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else
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nil
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end
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end
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def tag_name(ref)
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ref = ref.to_s
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if ref.start_with?('refs/tags')
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ref.sub(%r{\Arefs/tags/}, '')
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else
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nil
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end
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end
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protected
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def build_status_object(status, message = '')
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GitAccessStatus.new(status, message)
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end
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end
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end
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