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//
// Copyright (c) SAS Institute Inc.
//
// 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 token
import (
"context"
"errors"
"fmt"
"os"
"strings"
"time"
"github.com/spf13/cobra"
"github.com/sassoftware/relic/v7/cmdline/shared"
"github.com/sassoftware/relic/v7/config"
"github.com/sassoftware/relic/v7/lib/passprompt"
"github.com/sassoftware/relic/v7/signers/sigerrors"
"github.com/sassoftware/relic/v7/token"
"github.com/sassoftware/relic/v7/token/open"
)
var (
argFile string
argKeyName string
argToken string
argLabel string
argRsaBits uint
argEcdsaBits uint
)
var tokenMap map[string]token.Token
func addKeyFlags(cmd *cobra.Command) {
cmd.Flags().StringVarP(&argKeyName, "key", "k", "", "Name of key section in config file to use")
}
func addSelectOrGenerateFlags(cmd *cobra.Command) {
addKeyFlags(cmd)
cmd.Flags().StringVarP(&argToken, "token", "t", "", "Name of token to generate key in")
cmd.Flags().StringVarP(&argLabel, "label", "l", "", "Label to attach to generated key")
cmd.Flags().UintVar(&argRsaBits, "generate-rsa", 0, "Generate a RSA key of the specified bit size, if needed")
cmd.Flags().UintVar(&argEcdsaBits, "generate-ecdsa", 0, "Generate an ECDSA key of the specified curve size, if needed")
}
// Update key config with values from --token and --label
func newKeyConfig() (*config.KeyConfig, error) {
if err := shared.InitConfig(); err != nil {
return nil, err
}
var keyConf *config.KeyConfig
if argKeyName != "" {
var err error
keyConf, err = shared.CurrentConfig.GetKey(argKeyName)
if err != nil {
return nil, err
}
} else {
if argToken == "" || argLabel == "" {
return nil, errors.New("Either --key, or --token and --label, must be set")
}
argKeyName = fmt.Sprintf("new-key-%d", time.Now().UnixNano())
keyConf = shared.CurrentConfig.NewKey(argKeyName)
}
if argToken != "" {
tokenConf, err := shared.CurrentConfig.GetToken(argToken)
if err != nil {
return nil, err
}
keyConf.SetToken(tokenConf)
}
if argLabel != "" {
keyConf.Label = argLabel
keyConf.ID = ""
}
return keyConf, nil
}
func selectOrGenerate() (key token.Key, err error) {
keyConf, err := newKeyConfig()
if err != nil {
return nil, err
}
tok, err := openToken(keyConf.Token)
if err != nil {
return nil, err
}
key, err = tok.GetKey(context.Background(), argKeyName)
if err == nil {
fmt.Fprintln(os.Stderr, "Using existing key in token")
return key, nil
} else if _, ok := err.(sigerrors.KeyNotFoundError); !ok {
return nil, err
}
fmt.Fprintln(os.Stderr, "Generating a new key in token")
if argRsaBits != 0 {
return tok.Generate(argKeyName, token.KeyTypeRsa, argRsaBits)
} else if argEcdsaBits != 0 {
return tok.Generate(argKeyName, token.KeyTypeEcdsa, argEcdsaBits)
} else {
return nil, errors.New("No matching key exists, specify --generate-rsa or --generate-ecdsa to generate one")
}
}
func openToken(tokenName string) (token.Token, error) {
tok, ok := tokenMap[tokenName]
if ok {
return tok, nil
}
err := shared.InitConfig()
if err != nil {
return nil, err
}
prompt := new(passprompt.PasswordPrompt)
tok, err = open.Token(shared.CurrentConfig, tokenName, prompt)
if err != nil {
return nil, err
}
if tokenMap == nil {
tokenMap = make(map[string]token.Token)
}
tokenMap[tokenName] = tok
return tok, nil
}
func openTokenByKey(keyName string) (token.Token, error) {
if keyName == "" {
return nil, errors.New("--key is a required parameter")
}
err := shared.InitConfig()
if err != nil {
return nil, err
}
keyConf, err := shared.CurrentConfig.GetKey(keyName)
if err != nil {
return nil, err
}
tok, err := openToken(keyConf.Token)
if err != nil {
return nil, err
}
return tok, nil
}
func openKey(keyName string) (token.Key, error) {
tok, err := openTokenByKey(keyName)
if err != nil {
return nil, err
}
key, err := tok.GetKey(context.Background(), keyName)
if err != nil {
tok.Close()
return nil, err
}
return key, err
}
func formatKeyID(keyID []byte) string {
chunks := make([]string, len(keyID))
for i, j := range keyID {
chunks[i] = fmt.Sprintf("%02x", j)
}
return strings.Join(chunks, ":")
}
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