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signingkeyseditor.go
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/
signingkeyseditor.go
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/*
*
* * Copyright 2018-2022 The NATS Authors
* * Licensed under the Apache License, Version 2.0 (the "License");
* * you may not use this file except in compliance with the License.
* * You may obtain a copy of the License at
* *
* * http://www.apache.org/licenses/LICENSE-2.0
* *
* * Unless required by applicable law or agreed to in writing, software
* * distributed under the License is distributed on an "AS IS" BASIS,
* * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* * See the License for the specific language governing permissions and
* * limitations under the License.
*
*/
package cmd
import (
"fmt"
cli "github.com/nats-io/cliprompts/v2"
"github.com/nats-io/nkeys"
"github.com/nats-io/nsc/v2/cmd/store"
"github.com/spf13/cobra"
)
type SigningKeysParams struct {
flagName string
paths []string
kind nkeys.PrefixByte
}
func (e *SigningKeysParams) BindFlags(flagName string, shorthand string, kind nkeys.PrefixByte, cmd *cobra.Command) {
e.flagName = flagName
e.kind = kind
if kind == nkeys.PrefixByteCurve {
e.paths = make([]string, 1)
cmd.Flags().StringVarP(&e.paths[0], flagName, shorthand, "", `curve key or keypath or the value "generate" to generate a curve encryption target key on the fly`)
} else {
cmd.Flags().StringSliceVarP(&e.paths, flagName, shorthand, nil, `signing key or keypath or the value "generate" to generate a key pair on the fly - comma separated list or option can be specified multiple times`)
}
}
func (e *SigningKeysParams) BindFlagsForOne(flagName string, shorthand string, kind nkeys.PrefixByte, cmd *cobra.Command) {
e.flagName = flagName
e.kind = kind
if kind == nkeys.PrefixByteCurve {
e.paths = make([]string, 1)
cmd.Flags().StringVarP(&e.paths[0], flagName, shorthand, "", `curve key or keypath or the value "generate" to generate a curve encryption target key on the fly`)
} else {
cmd.Flags().StringSliceVarP(&e.paths, flagName, shorthand, nil, `signing key or keypath or the value "generate" to generate a key pair on the fly`)
}
}
func (e *SigningKeysParams) valid(s string) error {
if s == "generate" {
return nil
}
_, err := e.resolve(s)
return err
}
func (e *SigningKeysParams) resolve(s string) (nkeys.KeyPair, error) {
if s == "" {
return nil, fmt.Errorf("signing key cannot be empty")
}
if s == "generate" {
if kp, err := nkeys.CreatePair(e.kind); err != nil {
return nil, err
} else if s, err = kp.PublicKey(); err != nil {
return nil, err
} else if _, err = store.StoreKey(kp); err != nil {
return nil, err
}
}
kp, err := store.ResolveKey(s)
if err != nil {
return nil, err
}
if kp == nil {
return nil, fmt.Errorf("a %s key is required", e.label())
}
if !store.KeyPairTypeOk(e.kind, kp) {
return nil, fmt.Errorf("invalid %s %s key %q", e.kind.String(), e.label(), s)
}
return kp, nil
}
func (e *SigningKeysParams) label() string {
label := "signing"
if e.kind == nkeys.PrefixByteCurve {
label = "curve"
}
return label
}
func (e *SigningKeysParams) Valid() error {
for _, v := range e.paths {
if err := e.valid(v); err != nil {
return err
}
}
return nil
}
func (e *SigningKeysParams) Empty() bool {
return len(e.paths) == 0
}
func (e *SigningKeysParams) PublicKeys() ([]string, error) {
var keys []string
for _, v := range e.paths {
kp, err := e.resolve(v)
if err != nil {
return nil, err
}
pk, err := kp.PublicKey()
if err != nil {
return nil, err
}
keys = append(keys, pk)
}
return keys, nil
}
func (e *SigningKeysParams) Edit() error {
// verify any keys that were added via flags
for i, v := range e.paths {
sv, err := cli.Prompt(fmt.Sprintf("path to %s nkey or nkey", e.flagName), v, cli.Val(e.valid))
if err != nil {
return err
}
e.paths[i] = sv
}
first := true
for {
m := fmt.Sprintf("add a %s key", e.label())
if !first || len(e.paths) > 0 {
m = fmt.Sprintf("add another %s key", e.label())
}
first = false
ok, err := cli.Confirm(m, false)
if err != nil {
return err
}
if !ok {
break
}
sv, err := cli.Prompt(fmt.Sprintf("path to %s nkey or nkey", e.flagName), "", cli.Val(e.valid))
if err != nil {
return err
}
e.paths = append(e.paths, sv)
}
return nil
}