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revoke_sigs.go
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revoke_sigs.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 (
"errors"
"fmt"
"github.com/keybase/client/go/libkb"
keybase1 "github.com/keybase/client/go/protocol/keybase1"
)
type RevokeSigsEngine struct {
libkb.Contextified
sigIDQueries []string
}
func NewRevokeSigsEngine(g *libkb.GlobalContext, sigIDQueries []string) *RevokeSigsEngine {
return &RevokeSigsEngine{
sigIDQueries: sigIDQueries,
Contextified: libkb.NewContextified(g),
}
}
func (e *RevokeSigsEngine) Name() string {
return "RevokeSigs"
}
func (e *RevokeSigsEngine) Prereqs() Prereqs {
return Prereqs{
Device: true,
}
}
func (e *RevokeSigsEngine) RequiredUIs() []libkb.UIKind {
return []libkb.UIKind{
libkb.LogUIKind,
libkb.SecretUIKind,
}
}
func (e *RevokeSigsEngine) SubConsumers() []libkb.UIConsumer {
return []libkb.UIConsumer{}
}
func (e *RevokeSigsEngine) getSigIDsToRevoke(me *libkb.User) ([]keybase1.SigID, error) {
ret := make([]keybase1.SigID, len(e.sigIDQueries))
for i, query := range e.sigIDQueries {
if len(query) < keybase1.SigIDQueryMin {
return nil, errors.New("sigID query too short")
}
sigID, err := me.SigIDSearch(query)
if err != nil {
return nil, err
}
ret[i] = sigID
}
return ret, nil
}
func (e *RevokeSigsEngine) Run(m libkb.MetaContext) error {
m.G().LocalSigchainGuard().Set(m.Ctx(), "RevokeSigsEngine")
defer m.G().LocalSigchainGuard().Clear(m.Ctx(), "RevokeSigsEngine")
me, err := libkb.LoadMe(libkb.NewLoadUserArgWithMetaContext(m))
if err != nil {
return err
}
sigIDsToRevoke, err := e.getSigIDsToRevoke(me)
if err != nil {
return err
}
lease, merkleRoot, err := libkb.RequestDowngradeLeaseBySigIDs(m.Ctx(), m.G(), sigIDsToRevoke)
if err != nil {
return err
}
ska := libkb.SecretKeyArg{
Me: me,
KeyType: libkb.DeviceSigningKeyType,
}
sigKey, err := e.G().Keyrings.GetSecretKeyWithPrompt(m, m.SecretKeyPromptArg(ska, "to revoke a signature"))
if err != nil {
return err
}
if sigKey == nil {
return fmt.Errorf("Revocation signing key is nil.")
}
if err = sigKey.CheckSecretKey(); err != nil {
return err
}
proof, err := me.RevokeSigsProof(m, sigKey, sigIDsToRevoke, merkleRoot)
if err != nil {
return err
}
sig, _, linkID, err := libkb.SignJSON(proof.J, sigKey)
if err != nil {
return err
}
kid := sigKey.GetKID()
_, err = m.G().API.Post(m, libkb.APIArg{
Endpoint: "sig/revoke",
SessionType: libkb.APISessionTypeREQUIRED,
Args: libkb.HTTPArgs{
"signing_kid": libkb.S{Val: kid.String()},
"sig": libkb.S{Val: sig},
"downgrade_lease_id": libkb.S{Val: string(lease.LeaseID)},
},
})
if err != nil {
return err
}
return libkb.MerkleCheckPostedUserSig(m, me.GetUID(), proof.Seqno, linkID)
}