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pgp_keyfinder.go
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pgp_keyfinder.go
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// Copyright 2015 Keybase, Inc. All rights reserved. Use of
// this source code is governed by the included BSD license.
package engine
import (
"fmt"
"github.com/keybase/client/go/libkb"
keybase1 "github.com/keybase/client/go/protocol"
)
// PGPKeyfinder is an engine to find PGP Keys for users (loaded by
// assertions), possibly tracking them if necessary.
type PGPKeyfinder struct {
arg *PGPKeyfinderArg
uplus []*UserPlusKeys
loggedIn bool
me *libkb.User
runerr error
libkb.Contextified
}
type PGPKeyfinderArg struct {
Users []string
SkipTrack bool
TrackOptions keybase1.TrackOptions
}
// NewPGPKeyfinder creates a PGPKeyfinder engine.
func NewPGPKeyfinder(arg *PGPKeyfinderArg, g *libkb.GlobalContext) *PGPKeyfinder {
return &PGPKeyfinder{
arg: arg,
Contextified: libkb.NewContextified(g),
}
}
// Name is the unique engine name.
func (e *PGPKeyfinder) Name() string {
return "PGPKeyfinder"
}
// GetPrereqs returns the engine prereqs.
func (e *PGPKeyfinder) Prereqs() Prereqs {
return Prereqs{}
}
// RequiredUIs returns the required UIs.
func (e *PGPKeyfinder) RequiredUIs() []libkb.UIKind {
return []libkb.UIKind{}
}
// SubConsumers returns the other UI consumers for this engine.
func (e *PGPKeyfinder) SubConsumers() []libkb.UIConsumer {
return []libkb.UIConsumer{
&TrackEngine{},
&Identify{},
}
}
// Run starts the engine.
func (e *PGPKeyfinder) Run(ctx *Context) error {
e.setup(ctx)
e.verifyUsers(ctx)
e.loadKeys(ctx)
return e.runerr
}
// UsersPlusKeys returns the users found while running the engine,
// plus their pgp keys.
func (e *PGPKeyfinder) UsersPlusKeys() []*UserPlusKeys {
return e.uplus
}
func (e *PGPKeyfinder) setup(ctx *Context) {
if e.runerr != nil {
return
}
ok, err := IsLoggedIn(e, ctx)
if err != nil {
e.runerr = err
return
}
e.loggedIn = ok
}
func (e *PGPKeyfinder) verifyUsers(ctx *Context) {
if e.runerr != nil {
return
}
if e.loggedIn && !e.arg.SkipTrack {
e.loadMe()
e.trackUsers(ctx)
} else {
e.identifyUsers(ctx)
}
}
func (e *PGPKeyfinder) trackUsers(ctx *Context) {
if e.runerr != nil {
return
}
// need to track any users we aren't tracking
for _, u := range e.arg.Users {
if err := e.trackUser(ctx, u); err != nil {
// ignore self track errors
if _, ok := err.(libkb.SelfTrackError); !ok {
e.runerr = err
return
}
}
}
}
func (e *PGPKeyfinder) identifyUsers(ctx *Context) {
if e.runerr != nil {
return
}
// need to identify all the users
for _, u := range e.arg.Users {
if err := e.identifyUser(ctx, u); err != nil {
e.runerr = err
return
}
}
}
func (e *PGPKeyfinder) loadKeys(ctx *Context) {
if e.runerr != nil {
return
}
// get the pgp keys for all the users
for _, x := range e.uplus {
keys := x.User.GetActivePGPKeys(true)
if len(keys) == 0 {
e.runerr = fmt.Errorf("User %s doesn't have a pgp key", x.User.GetName())
return
}
x.Keys = keys
}
}
func (e *PGPKeyfinder) trackUser(ctx *Context, username string) error {
e.G().Log.Debug("tracking user %q", username)
arg := &TrackEngineArg{
Me: e.me,
UserAssertion: username,
Options: e.arg.TrackOptions,
}
eng := NewTrackEngine(arg, e.G())
if err := RunEngine(eng, ctx); err != nil {
return err
}
e.addUser(eng.User(), true)
return nil
}
// PC: maybe we need to bring the TrackUI back for the
// context...so that this one can use an IdentifyUI and trackUser
// can use a TrackUI...
func (e *PGPKeyfinder) identifyUser(ctx *Context, user string) error {
arg := NewIdentifyArg(user, false, false)
eng := NewIdentify(arg, e.G())
if err := RunEngine(eng, ctx); err != nil {
return err
}
e.addUser(eng.User(), false)
return nil
}
type UserPlusKeys struct {
User *libkb.User
IsTracked bool
Keys []*libkb.PGPKeyBundle
}
func (e *PGPKeyfinder) loadMe() {
if e.runerr != nil {
return
}
if e.me != nil {
return
}
me, err := libkb.LoadMe(libkb.NewLoadUserArg(e.G()))
if err != nil {
e.runerr = err
return
}
e.me = me
}
func (e *PGPKeyfinder) addUser(user *libkb.User, tracked bool) {
e.uplus = append(e.uplus, &UserPlusKeys{User: user, IsTracked: tracked})
}