sgaunet/jwt-cli

package cryptojwt

import (
    "encoding/json"
    "fmt"

    "github.com/golang-jwt/jwt/v5"
)

type Encoder interface {
    Encode(payload string) (string, error)
}

type Decoder interface {
    Decode(token string) (string, error)
}

type EncoderDecoder interface {
    Encoder
    Decoder
}

type encoder struct {
}

type decoder struct {
}

func (e *encoder) EncodeJWT(secret interface{}, signingMethod jwt.SigningMethod, payload string) (string, error) {
    claims := jwt.MapClaims{}
    err := json.Unmarshal([]byte(payload), &claims)
    if err != nil {
        return "", fmt.Errorf("payload is not a valid JSON: %w", err)
    }
    // Create token
    token := jwt.NewWithClaims(signingMethod, claims)
    // Generate encoded token and send it as response.
    t, err := token.SignedString(secret)
    return t, err
}

func (d *decoder) DecodeJWT(secret interface{}, token string) (string, error) {
    claims := jwt.MapClaims{}
    _, err := jwt.ParseWithClaims(token, claims, func(token *jwt.Token) (interface{}, error) {
        return secret, nil
    })
    if err != nil {
        return "", err
    }
    res, err := json.MarshalIndent(claims, "", "  ")
    if err != nil {
        return "", err
    }
    return string(res), nil
}