如何编码JWT进行APN标记化(.NET,C#)

感谢您的回答,不得不联系许多支持来完成这项工作.这是最终结果的样子.

/// 

    /// Method returns ECDSA signed JWT token format, from json header, json payload and privateKey (pure string extracted from *.p8 file - PKCS#8 format)
    /// 
    /// ECDSA256 key
    /// JSON header, i.e. "{\"alg\":\"ES256\" ,\"kid\":\"1234567899"\"}"
    /// JSON payload, i.e.  {\"iss\":\"MMMMMMMMMM"\",\"iat\":"122222222229"}"
    /// base64url encoded JWT token
    public static string SignES256(string privateKey, string header, string payload)
    {
        CngKey key = CngKey.Import(
            Convert.FromBase64String(privateKey), 
            CngKeyBlobFormat.Pkcs8PrivateBlob);

        using (ECDsaCng dsa = new ECDsaCng(key))
        {
            dsa.HashAlgorithm = CngAlgorithm.Sha256;
            var unsignedJwtData = 
                Url.Base64urlEncode(Encoding.UTF8.GetBytes(header)) + "." + Url.Base64urlEncode(Encoding.UTF8.GetBytes(payload));
            var signature = 
                dsa.SignData(Encoding.UTF8.GetBytes(unsignedJwtData));
            return unsignedJwtData + "." + Url.Base64urlEncode(signature);
        }
    }