jwt/token/showtoken.go

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// Copyright © 2018 ehlxr <ehlxr.me@gmail.com>
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
package token
import (
"fmt"
"os"
"regexp"
jwt "github.com/dgrijalva/jwt-go"
"github.com/spf13/cobra"
)
// showToken pretty-prints the token on the command line.
func ShowToken(cmd *cobra.Command) error {
flagToken := cmd.LocalFlags().Lookup("token").Value.String()
flagDebug := promptDebug()
flagCompact := promptCompact()
// get the token
tokData, err := loadData(flagToken)
if err != nil {
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return fmt.Errorf("couldn't read token: %v", err)
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}
// trim possible whitespace from token
tokData = regexp.MustCompile(`\s*$`).ReplaceAll(tokData, []byte{})
if flagDebug {
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_, _ = fmt.Fprintf(os.Stderr, "Token len: %v bytes\n", len(tokData))
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}
token, err := jwt.Parse(string(tokData), nil)
if token == nil {
return fmt.Errorf("malformed token: %v", err)
}
// Print the token details
fmt.Println("Header:")
if err := printJSON(token.Header, flagCompact); err != nil {
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return fmt.Errorf("failed to output header: %v", err)
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}
fmt.Println("Claims:")
if err := printJSON(token.Claims, flagCompact); err != nil {
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return fmt.Errorf("failed to output claims: %v", err)
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}
return nil
}