JWT helper, jose-jwt 範例

JwtHelper.apply.cs

record MyInfo
{
    public string foo { get; set; }
    public string bar { get; set; }
    public decimal abc { get; set; }
}

var info = new MyInfo { 
    foo = "FOO 123.456",
    bar = "我是中文字",
    abc = 9876543210.1234m
};

var token = JwtHelper.SimpleEncode(info);
var payload = JwtHelper.SimpleDecode<MyInfo>(token);

JwtHelper.cs

using Jose;
using System;
using System.Linq;
using System.Text;
using System.Text.Json;

static class JwtHelper
{
    static readonly byte[] key192 = { 131, 117, 87, 14, xxx, 150, 19, 75, 24, xxx, 159, 78, 90, 51, xxx, 159, 214, 186, 251, xxx, 207, 246, 142, 127 };

    public static string SimpleEncode<TObject>(TObject payload)
    {
        string json = JsonSerializer.Serialize<TObject>(payload);
        byte[] blob = Encoding.UTF8.GetBytes(json);
        byte[] blobR = blob.Select(b => (byte)~b).ToArray();
        string token = JWT.EncodeBytes(blobR, key192, JweAlgorithm.A192GCMKW, JweEncryption.A192GCM);
        string tokenR = String.Join('.', token.Split('.').Reverse());
        return tokenR;
    }

    public static TObject SimpleDecode<TObject>(string token)
    {
        string tokenR = String.Join('.', token.Split('.').Reverse());
        byte[] blobR = JWT.DecodeBytes(tokenR, key192, JweAlgorithm.A192GCMKW, JweEncryption.A192GCM);
        byte[] blob = blobR.Select(b => (byte)~b).ToArray();
        string json = Encoding.UTF8.GetString(blob, 0, blob.Length);
        TObject payload = JsonSerializer.Deserialize<TObject>(json);
        return payload;
    }
}