forked from keybase/client
/
prove.go
378 lines (341 loc) · 9.34 KB
/
prove.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"
libkb "github.com/keybase/client/go/libkb"
keybase1 "github.com/keybase/client/go/protocol/keybase1"
jsonw "github.com/keybase/go-jsonw"
"golang.org/x/net/context"
)
// Prove is an engine used for proving ownership of remote accounts,
// like Twitter, GitHub, etc.
type Prove struct {
arg *keybase1.StartProofArg
me *libkb.User
st libkb.ServiceType
supersede bool
proof *jsonw.Wrapper
sig string
sigID keybase1.SigID
postRes *libkb.PostProofRes
signingKey libkb.GenericKey
remoteNameNormalized string
libkb.Contextified
}
// NewProve makes a new Prove Engine given an RPC-friendly ProveArg.
func NewProve(arg *keybase1.StartProofArg, g *libkb.GlobalContext) *Prove {
return &Prove{
arg: arg,
Contextified: libkb.NewContextified(g),
}
}
// Name provides the name of this engine for the engine interface contract
func (p *Prove) Name() string {
return "Prove"
}
// GetPrereqs returns the engine prereqs.
func (p *Prove) Prereqs() Prereqs {
return Prereqs{Device: true}
}
// RequiredUIs returns the required UIs.
func (p *Prove) RequiredUIs() []libkb.UIKind {
return []libkb.UIKind{
libkb.LogUIKind,
libkb.ProveUIKind,
libkb.SecretUIKind,
}
}
// SubConsumers returns the other UI consumers for this engine.
func (p *Prove) SubConsumers() []libkb.UIConsumer {
return nil
}
func (p *Prove) loadMe() (err error) {
p.me, err = libkb.LoadMe(libkb.NewLoadUserForceArg(p.G()))
return
}
func (p *Prove) checkExists1(ctx *Context) (err error) {
proofs := p.me.IDTable().GetActiveProofsFor(p.st)
if len(proofs) != 0 && !p.arg.Force && p.st.LastWriterWins() {
lst := proofs[len(proofs)-1]
var redo bool
redo, err = ctx.ProveUI.PromptOverwrite(context.TODO(), keybase1.PromptOverwriteArg{
Account: lst.ToDisplayString(),
Typ: keybase1.PromptOverwriteType_SOCIAL,
})
if err != nil {
return err
}
if !redo {
return libkb.NotConfirmedError{}
}
p.supersede = true
}
return
}
func (p *Prove) promptRemoteName(ctx *Context) error {
// If the name is already supplied, there's no need to prompt.
if len(p.arg.Username) > 0 {
remoteNameNormalized, err := p.st.NormalizeRemoteName(p.G(), p.arg.Username)
if err == nil {
p.remoteNameNormalized = remoteNameNormalized
}
return err
}
// Prompt for the name, retrying if it's invalid.
var normalizationError error
for {
un, err := ctx.ProveUI.PromptUsername(context.TODO(), keybase1.PromptUsernameArg{
Prompt: p.st.GetPrompt(),
PrevError: libkb.ExportErrorAsStatus(normalizationError),
})
if err != nil {
// Errors here are conditions like EOF. Return them rather than retrying.
return err
}
var remoteNameNormalized string
remoteNameNormalized, normalizationError = p.st.NormalizeRemoteName(p.G(), un)
if normalizationError == nil {
p.remoteNameNormalized = remoteNameNormalized
return nil
}
}
}
func (p *Prove) checkExists2(ctx *Context) (err error) {
p.G().Log.Debug("+ CheckExists2")
defer func() { p.G().Log.Debug("- CheckExists2 -> %s", libkb.ErrToOk(err)) }()
if !p.st.LastWriterWins() {
var found libkb.RemoteProofChainLink
for _, proof := range p.me.IDTable().GetActiveProofsFor(p.st) {
_, name := proof.ToKeyValuePair()
if libkb.Cicmp(name, p.remoteNameNormalized) {
found = proof
break
}
}
if found != nil {
var redo bool
redo, err = ctx.ProveUI.PromptOverwrite(context.TODO(), keybase1.PromptOverwriteArg{
Account: found.ToDisplayString(),
Typ: keybase1.PromptOverwriteType_SITE,
})
if err != nil {
return
}
if !redo {
err = libkb.NotConfirmedError{}
return
}
p.supersede = true
}
}
return
}
func (p *Prove) doPrechecks(ctx *Context) (err error) {
var w *libkb.Markup
w, err = p.st.PreProofCheck(p.G(), p.remoteNameNormalized)
if w != nil {
if uierr := ctx.ProveUI.OutputPrechecks(context.TODO(), keybase1.OutputPrechecksArg{Text: w.Export()}); uierr != nil {
p.G().Log.Warning("prove ui OutputPrechecks call error: %s", uierr)
}
}
return
}
func (p *Prove) doWarnings(ctx *Context) (err error) {
if mu := p.st.PreProofWarning(p.remoteNameNormalized); mu != nil {
var ok bool
arg := keybase1.PreProofWarningArg{Text: mu.Export()}
if ok, err = ctx.ProveUI.PreProofWarning(context.TODO(), arg); err == nil && !ok {
err = libkb.NotConfirmedError{}
}
}
return
}
func (p *Prove) generateProof(ctx *Context) (err error) {
ska := libkb.SecretKeyArg{
Me: p.me,
KeyType: libkb.DeviceSigningKeyType,
}
p.signingKey, err = p.G().Keyrings.GetSecretKeyWithPrompt(ctx.SecretKeyPromptArg(ska, "tracking signature"))
if err != nil {
return err
}
if p.proof, err = p.me.ServiceProof(p.signingKey, p.st, p.remoteNameNormalized); err != nil {
return
}
if p.sig, p.sigID, _, err = libkb.SignJSON(p.proof, p.signingKey); err != nil {
return
}
return
}
func (p *Prove) postProofToServer() (err error) {
arg := libkb.PostProofArg{
Sig: p.sig,
ProofType: p.st.GetProofType(),
ID: p.sigID,
Supersede: p.supersede,
RemoteUsername: p.remoteNameNormalized,
RemoteKey: p.st.GetAPIArgKey(),
SigningKey: p.signingKey,
}
p.postRes, err = libkb.PostProof(arg)
return
}
func (p *Prove) instructAction(ctx *Context) (err error) {
mkp := p.st.PostInstructions(p.remoteNameNormalized)
var txt string
if txt, err = p.st.FormatProofText(p.postRes); err != nil {
return
}
err = ctx.ProveUI.OutputInstructions(context.TODO(), keybase1.OutputInstructionsArg{
Instructions: mkp.Export(),
Proof: txt,
})
if err != nil {
return err
}
return p.checkAutoPost(ctx, txt)
}
func (p *Prove) checkAutoPost(ctx *Context, txt string) error {
if !p.arg.Auto {
return nil
}
if libkb.RemoteServiceTypes[p.arg.Service] != keybase1.ProofType_ROOTER {
return nil
}
p.G().Log.Debug("making automatic post of proof to rooter")
apiArg := libkb.APIArg{
Endpoint: "rooter",
NeedSession: true,
Args: libkb.HTTPArgs{
"post": libkb.S{Val: txt},
"username": libkb.S{Val: p.arg.Username},
},
}
_, err := p.G().API.Post(apiArg)
if err != nil {
p.G().Log.Debug("error posting to rooter: %s", err)
return err
}
return nil
}
func (p *Prove) promptPostedLoop(ctx *Context) (err error) {
found := false
for i := 0; ; i++ {
var retry bool
var status keybase1.ProofStatus
var warn *libkb.Markup
retry, err = ctx.ProveUI.OkToCheck(context.TODO(), keybase1.OkToCheckArg{
Name: p.st.DisplayName(p.remoteNameNormalized),
Attempt: i,
})
if !retry || err != nil {
break
}
found, status, _, err = libkb.CheckPosted(p.postRes.ID)
if found || err != nil {
break
}
warn, err = p.st.RecheckProofPosting(i, status, p.remoteNameNormalized)
if warn != nil {
uierr := ctx.ProveUI.DisplayRecheckWarning(context.TODO(), keybase1.DisplayRecheckWarningArg{
Text: warn.Export(),
})
if uierr != nil {
p.G().Log.Warning("prove ui DisplayRecheckWarning call error: %s", uierr)
}
}
if err != nil {
break
}
}
if !found && err == nil {
err = libkb.ProofNotYetAvailableError{}
}
return
}
func (p *Prove) checkProofText() error {
p.G().Log.Debug("p.postRes.Text: %q", p.postRes.Text)
p.G().Log.Debug("p.sigID: %q", p.sigID)
return p.st.CheckProofText(p.postRes.Text, p.sigID, p.sig)
}
func (p *Prove) getServiceType() (err error) {
if p.st = p.G().Services.GetServiceType(p.arg.Service); p.st == nil {
err = libkb.BadServiceError{Service: p.arg.Service}
}
return
}
// SigID returns the signature id of the proof posted to the
// server.
func (p *Prove) SigID() keybase1.SigID {
return p.sigID
}
// Run runs the Prove engine, performing all steps of the proof process.
func (p *Prove) Run(ctx *Context) (err error) {
p.G().Log.Debug("+ ProofEngine.Run")
defer func() {
p.G().Log.Debug("- ProofEngine.Run -> %s", libkb.ErrToOk(err))
}()
stage := func(s string) {
p.G().Log.Debug("| ProofEngine.Run() %s", s)
}
stage("GetServiceType")
if err = p.getServiceType(); err != nil {
return
}
// Disable creating Facebook proofs in prod for now. (The proof type still
// exists, because we support checking them.) TODO: Delete me!
if p.G().GetRunMode() == libkb.ProductionRunMode && p.st.GetTypeName() == "facebook" {
return fmt.Errorf("Facebook proofs aren't ready yet, but they will be soon!")
}
stage("LoadMe")
if err = p.loadMe(); err != nil {
return
}
stage("CheckExists1")
if err = p.checkExists1(ctx); err != nil {
return
}
stage("PromptRemoteName")
if err = p.promptRemoteName(ctx); err != nil {
return
}
stage("CheckExists2")
if err = p.checkExists2(ctx); err != nil {
return
}
stage("DoPrechecks")
if err = p.doPrechecks(ctx); err != nil {
return
}
stage("DoWarnings")
if err = p.doWarnings(ctx); err != nil {
return
}
stage("GenerateProof")
if err = p.generateProof(ctx); err != nil {
return
}
stage("PostProofToServer")
if err = p.postProofToServer(); err != nil {
return
}
stage("CheckProofText")
if err = p.checkProofText(); err != nil {
return
}
stage("InstructAction")
if err = p.instructAction(ctx); err != nil {
return
}
if !p.arg.PromptPosted {
p.G().Log.Debug("PromptPosted not set, prove run finished")
return
}
stage("PromptPostedLoop")
if err = p.promptPostedLoop(ctx); err != nil {
return
}
ctx.LogUI.Notice("Success!")
return nil
}