78 lines
1.9 KiB
Go
78 lines
1.9 KiB
Go
package authorization
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import (
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"github.com/Sirupsen/logrus"
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"github.com/docker/docker/pkg/plugins"
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)
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// Plugin allows third party plugins to authorize requests and responses
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// in the context of docker API
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type Plugin interface {
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// AuthZRequest authorize the request from the client to the daemon
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AuthZRequest(*Request) (*Response, error)
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// AuthZResponse authorize the response from the daemon to the client
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AuthZResponse(*Request) (*Response, error)
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}
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// NewPlugins constructs and initialize the authorization plugins based on plugin names
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func NewPlugins(names []string) []Plugin {
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plugins := make([]Plugin, len(names))
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for i, name := range names {
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plugins[i] = newAuthorizationPlugin(name)
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}
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return plugins
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}
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// authorizationPlugin is an internal adapter to docker plugin system
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type authorizationPlugin struct {
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plugin *plugins.Plugin
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name string
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}
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func newAuthorizationPlugin(name string) Plugin {
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return &authorizationPlugin{name: name}
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}
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func (a *authorizationPlugin) AuthZRequest(authReq *Request) (*Response, error) {
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logrus.Debugf("AuthZ requset using plugins %s", a.name)
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if err := a.initPlugin(); err != nil {
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return nil, err
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}
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authRes := &Response{}
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if err := a.plugin.Client.Call(AuthZApiRequest, authReq, authRes); err != nil {
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return nil, err
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}
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return authRes, nil
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}
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func (a *authorizationPlugin) AuthZResponse(authReq *Request) (*Response, error) {
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logrus.Debugf("AuthZ response using plugins %s", a.name)
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if err := a.initPlugin(); err != nil {
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return nil, err
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}
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authRes := &Response{}
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if err := a.plugin.Client.Call(AuthZApiResponse, authReq, authRes); err != nil {
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return nil, err
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}
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return authRes, nil
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}
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// initPlugin initialize the authorization plugin if needed
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func (a *authorizationPlugin) initPlugin() error {
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// Lazy loading of plugins
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if a.plugin == nil {
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var err error
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a.plugin, err = plugins.Get(a.name, AuthZApiImplements)
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if err != nil {
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return err
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}
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}
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return nil
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}
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