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c#apple-push-notificationspushsharp
Mike Keskinov
Mike Keskinov

Reputation: 11878

Pushsharp support of Apple Push Notification Authentication Key

Does pushsharp supports a new Apple approach for sending APN using Apple Push Notification Authentication Key (which never expires) instead of using Certificates? Is any way to use it with pushsharp? If not, is there any other C# library to support it?

Upvotes: 9

Views: 1082

Answers (1)

Mohammad
Mohammad

Reputation: 2764

here you are:

private string GetToken()
{
    var algorithm = "ES256";
    var teamID = "teamID";
    var apnsKeyID = "apnsKeyID";
    var apnsAuthKeyPath = @"apnsAuthKeyPath";
    var epochNow = DateTimeOffset.Now.ToUnixTimeSeconds();

    var header = new Dictionary<string, object>()
    {
        { "alg", algorithm },
        { "kid" , apnsKeyID }
    };
    var payload = new Dictionary<string, object>()
    {
        { "iss", teamID },
        { "iat", epochNow }
    };

    var privateKey = GetPrivateKey(apnsAuthKeyPath);
    var token = Jose.JWT.Encode(payload, privateKey, algorithm: Jose.JwsAlgorithm.ES256, extraHeaders: header);
    return token;
}
private CngKey GetPrivateKey(string apnsAuthKey)
{
    using (var reader = File.OpenText(apnsAuthKey))
    {
        var ecPrivateKeyParameters = (ECPrivateKeyParameters)new PemReader(reader).ReadObject();
        var x = ecPrivateKeyParameters.Parameters.G.AffineXCoord.GetEncoded();
        var y = ecPrivateKeyParameters.Parameters.G.AffineYCoord.GetEncoded();
        var d = ecPrivateKeyParameters.D.ToByteArrayUnsigned();
        return EccKey.New(x, y, d);
    }
}

then you can simply call send method in apns.

Upvotes: 1

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