authcli

Documentation

Overview

Package authcli implements authentication related flags parsing and CLI subcommands.

It can be used from CLI tools that want customize authentication configuration from the command line.

Minimal example of using flags parsing:

authFlags := authcli.Flags{}
defaults := ... // prepare default auth.Options
authFlags.Register(flag.CommandLine, defaults)
flag.Parse()
opts, err := authFlags.Options()
if err != nil {
  // handle error
}
authenticator := auth.NewAuthenticator(ctx, auth.SilentLogin, opts)
httpClient, err := authenticator.Client()
if err != nil {
  // handle error
}

This assumes that either a service account credentials are used (passed via -service-account-json), or the user has previously ran "login" subcommand and their refresh token is already cached. In any case, there will be no interaction with the user (this is what auth.SilentLogin means): if there are no cached token, authenticator.Client will return auth.ErrLoginRequired.

Interaction with the user happens only in "login" subcommand. This subcommand (as well as a bunch of other related commands) can be added to any subcommands.Application.

While it will work with any subcommand.Application, it uses luci-go/common/cli.GetContext() to grab a context for logging, so callers should prefer using cli.Application for hosting auth subcommands and making the context. This ensures consistent logging style between all subcommands of a CLI application:

import (
  ...
  "go.chromium.org/luci/client/authcli"
  "go.chromium.org/luci/common/cli"
)

func GetApplication(defaultAuthOpts auth.Options) *cli.Application {
  return &cli.Application{
    Name:  "app_name",

    Context: func(ctx context.Context) context.Context {
      ... configure logging, etc. ...
      return ctx
    },

    Commands: []*subcommands.Command{
      authcli.SubcommandInfo(defaultAuthOpts, "auth-info", false),
      authcli.SubcommandLogin(defaultAuthOpts, "auth-login", false),
      authcli.SubcommandLogout(defaultAuthOpts, "auth-logout", false),
      ...
    },
  }
}

func main() {
  defaultAuthOpts := ...
  app := GetApplication(defaultAuthOpts)
  os.Exit(subcommands.Run(app, nil))
}

Index

• Constants
• func SubcommandContext(opts auth.Options, name string) *subcommands.Command
• func SubcommandContextWithParams(params CommandParams) *subcommands.Command
• func SubcommandInfo(opts auth.Options, name string, advanced bool) *subcommands.Command
• func SubcommandInfoWithParams(params CommandParams) *subcommands.Command
• func SubcommandLogin(opts auth.Options, name string, advanced bool) *subcommands.Command
• func SubcommandLoginWithParams(params CommandParams) *subcommands.Command
• func SubcommandLogout(opts auth.Options, name string, advanced bool) *subcommands.Command
• func SubcommandLogoutWithParams(params CommandParams) *subcommands.Command
• func SubcommandToken(opts auth.Options, name string) *subcommands.Command
• func SubcommandTokenWithParams(params CommandParams) *subcommands.Command
• type CommandParams
• type Flags
  • func (fl *Flags) Options() (auth.Options, error)
  • func (fl *Flags) Register(f *flag.FlagSet, defaults auth.Options)
  • func (fl *Flags) RegisterIDTokenFlags(f *flag.FlagSet)
• type IDTokenInfo
  • func (tokenInfo IDTokenInfo) PrintFormatted()
• type OAuthTokenInfo
  • func (tokenInfo OAuthTokenInfo) PrintFormatted()

Constants

const (
	ExitCodeSuccess = iota
	ExitCodeNoValidToken
	ExitCodeInvalidInput
	ExitCodeInternalError
	ExitCodeBadLogin
)

Process exit codes for subcommands.

Functions

func SubcommandContext

func SubcommandContext(opts auth.Options, name string) *subcommands.Command

SubcommandContext returns subcommand.Command that can be used to setup new LUCI authentication context for a process tree.

This is an advanced command and shouldn't be usually embedded into binaries. It is primarily used by 'luci-auth' program. It exists to simplify development and debugging of programs that rely on LUCI authentication context.

func SubcommandContextWithParams

func SubcommandContextWithParams(params CommandParams) *subcommands.Command

SubcommandContextWithParams returns subcommand.Command that can be used to setup new LUCI authentication context for a process tree.

func SubcommandInfo

func SubcommandInfo(opts auth.Options, name string, advanced bool) *subcommands.Command

SubcommandInfo returns subcommand.Command that can be used to print current cached credentials.

func SubcommandInfoWithParams

func SubcommandInfoWithParams(params CommandParams) *subcommands.Command

SubcommandInfoWithParams returns subcommand.Command that can be used to print current cached credentials.

func SubcommandLogin

func SubcommandLogin(opts auth.Options, name string, advanced bool) *subcommands.Command

SubcommandLogin returns subcommands.Command that can be used to perform interactive login.

func SubcommandLoginWithParams

func SubcommandLoginWithParams(params CommandParams) *subcommands.Command

SubcommandLoginWithParams returns subcommands.Command that can be used to perform interactive login.

func SubcommandLogout

func SubcommandLogout(opts auth.Options, name string, advanced bool) *subcommands.Command

SubcommandLogout returns subcommands.Command that can be used to purge cached credentials.

func SubcommandLogoutWithParams

func SubcommandLogoutWithParams(params CommandParams) *subcommands.Command

SubcommandLogoutWithParams returns subcommands.Command that can be used to purge cached credentials.

func SubcommandToken

func SubcommandToken(opts auth.Options, name string) *subcommands.Command

SubcommandToken returns subcommand.Command that can be used to print current access token.

func SubcommandTokenWithParams

func SubcommandTokenWithParams(params CommandParams) *subcommands.Command

SubcommandTokenWithParams returns subcommand.Command that can be used to print current access token.

Types

type CommandParams

type CommandParams struct {
	Name     string // name of the subcommand
	Advanced bool   // treat this as an 'advanced' subcommand

	AuthOptions auth.Options // default auth options

	// UseScopeFlags specifies whether scope-related flags must be registered.
	//
	// This is primarily used by `luci-auth` executable.
	//
	// UseScopeFlags is *not needed* for command line tools that call a fixed
	// number of backends. Just add all necessary scopes to AuthOptions.Scopes,
	// no need to expose a flag.
	UseScopeFlags bool

	// UseIDTokenFlags specifies whether to register flags related to ID tokens.
	//
	// This is primarily used by `luci-auth` executable.
	UseIDTokenFlags bool
}

CommandParams specifies various parameters for a subcommand.

type Flags

type Flags struct {
	// contains filtered or unexported fields
}

Flags defines command line flags related to authentication.

func (*Flags) Options

func (fl *Flags) Options() (auth.Options, error)

Options returns auth.Options populated based on parsed command line flags.

func (*Flags) Register

func (fl *Flags) Register(f *flag.FlagSet, defaults auth.Options)

Register adds auth related flags to a FlagSet.

func (*Flags) RegisterIDTokenFlags

func (fl *Flags) RegisterIDTokenFlags(f *flag.FlagSet)

RegisterIDTokenFlags adds flags related to ID tokens.

type IDTokenInfo

type IDTokenInfo struct {
	Email    string `json:"email"`
	Issuer   string `json:"issuer"`
	Subject  string `json:"subject"`
	Audience string `json:"audience"`
}

IDTokenInfo contains details about an ID token.

func (IDTokenInfo) PrintFormatted

func (tokenInfo IDTokenInfo) PrintFormatted()

PrintFormatted prints the token in a human-friendly manner.

type OAuthTokenInfo

type OAuthTokenInfo struct {
	Email    string   `json:"email,omitempty"`
	UID      string   `json:"uid,omitempty"`
	ClientID string   `json:"client_id"`
	Scopes   []string `json:"scopes"`
}

OAuthTokenInfo contains details about an OAuth access token.

func (OAuthTokenInfo) PrintFormatted

func (tokenInfo OAuthTokenInfo) PrintFormatted()

PrintFormatted prints the token in a human-friendly manner.