forked from keybase/client
/
saltpack_encrypt.go
160 lines (137 loc) · 3.73 KB
/
saltpack_encrypt.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 (
"io"
"github.com/keybase/client/go/libkb"
keybase1 "github.com/keybase/client/go/protocol/keybase1"
)
type SaltpackEncryptArg struct {
Opts keybase1.SaltpackEncryptOptions
Source io.Reader
Sink io.WriteCloser
}
// SaltpackEncrypt encrypts data read from a source into a sink
// for a set of users. It will track them if necessary.
type SaltpackEncrypt struct {
arg *SaltpackEncryptArg
libkb.Contextified
me *libkb.User
}
// NewSaltpackEncrypt creates a SaltpackEncrypt engine.
func NewSaltpackEncrypt(arg *SaltpackEncryptArg, g *libkb.GlobalContext) *SaltpackEncrypt {
return &SaltpackEncrypt{
arg: arg,
Contextified: libkb.NewContextified(g),
}
}
// Name is the unique engine name.
func (e *SaltpackEncrypt) Name() string {
return "SaltpackEncrypt"
}
// GetPrereqs returns the engine prereqs.
func (e *SaltpackEncrypt) Prereqs() Prereqs {
return Prereqs{}
}
// RequiredUIs returns the required UIs.
func (e *SaltpackEncrypt) RequiredUIs() []libkb.UIKind {
return []libkb.UIKind{
libkb.SecretUIKind,
}
}
// SubConsumers returns the other UI consumers for this engine.
func (e *SaltpackEncrypt) SubConsumers() []libkb.UIConsumer {
return []libkb.UIConsumer{
&DeviceKeyfinder{},
}
}
func (e *SaltpackEncrypt) loadMyPublicKeys() ([]libkb.NaclDHKeyPublic, error) {
var ret []libkb.NaclDHKeyPublic
ckf := e.me.GetComputedKeyFamily()
if ckf == nil {
return ret, libkb.NoKeyError{Msg: "no suitable encryption keys found for you"}
}
keys := ckf.GetAllActiveSubkeys()
for _, key := range keys {
if kp, ok := key.(libkb.NaclDHKeyPair); ok {
ret = append(ret, kp.Public)
}
}
if len(ret) == 0 {
return ret, libkb.NoKeyError{Msg: "no suitable encryption keys found for you"}
}
return ret, nil
}
func (e *SaltpackEncrypt) loadMe(ctx *Context) error {
loggedIn, uid, err := IsLoggedIn(e, ctx)
if err != nil || !loggedIn {
return err
}
e.me, err = libkb.LoadMeByUID(e.G(), uid)
return err
}
// Run starts the engine.
func (e *SaltpackEncrypt) Run(ctx *Context) (err error) {
e.G().Log.Debug("+ SaltpackEncrypt::Run")
defer func() {
e.G().Log.Debug("- SaltpackEncrypt::Run -> %v", err)
}()
var receivers []libkb.NaclDHKeyPublic
var sender libkb.NaclDHKeyPair
if err = e.loadMe(ctx); err != nil {
return err
}
if !e.arg.Opts.NoSelfEncrypt && e.me != nil {
receivers, err = e.loadMyPublicKeys()
if err != nil {
return err
}
}
kfarg := DeviceKeyfinderArg{
Users: e.arg.Opts.Recipients,
NeedEncryptKeys: true,
Self: e.me,
}
kf := NewDeviceKeyfinder(e.G(), kfarg)
if err := RunEngine(kf, ctx); err != nil {
return err
}
uplus := kf.UsersPlusKeys()
for _, up := range uplus {
for _, k := range up.DeviceKeys {
gk, err := libkb.ImportKeypairFromKID(k.KID)
if err != nil {
return err
}
kp, ok := gk.(libkb.NaclDHKeyPair)
if !ok {
return libkb.KeyCannotEncryptError{}
}
receivers = append(receivers, kp.Public)
}
}
if !e.arg.Opts.HideSelf && e.me != nil {
ska := libkb.SecretKeyArg{
Me: e.me,
KeyType: libkb.DeviceEncryptionKeyType,
}
key, err := e.G().Keyrings.GetSecretKeyWithPrompt(ctx.SecretKeyPromptArg(ska, "encrypting a message/file"))
if err != nil {
return err
}
kp, ok := key.(libkb.NaclDHKeyPair)
if !ok || kp.Private == nil {
return libkb.KeyCannotDecryptError{}
}
sender = kp
}
encarg := libkb.SaltpackEncryptArg{
Source: e.arg.Source,
Sink: e.arg.Sink,
Receivers: receivers,
Sender: sender,
Binary: e.arg.Opts.Binary,
HideRecipients: e.arg.Opts.HideRecipients,
}
return libkb.SaltpackEncrypt(e.G(), &encarg)
}