public static EncryptionResult Encrypt(string userKey, string userSecret, string payload)
{
var userKeyBytes = UrlBase64.Decode(userKey);
var userSecretBytes = UrlBase64.Decode(userSecret);
var payloadBytes = Encoding.UTF8.GetBytes(payload);
return(Encrypt(userKeyBytes, userSecretBytes, payloadBytes));
}
public static void ValidatePrivateKey(string privateKey)
{
if (string.IsNullOrEmpty(privateKey))
{
throw new ArgumentException(@"Valid private key not set");
}
var decodedPrivateKey = UrlBase64.Decode(privateKey);
if (decodedPrivateKey.Length != 32)
{
throw new ArgumentException(@"Vapid private key should be 32 bytes long when decoded.");
}
}
public static void ValidatePublicKey(string publicKey)
{
if (string.IsNullOrEmpty(publicKey))
{
throw new ArgumentException(@"Valid public key not set");
}
var decodedPublicKey = UrlBase64.Decode(publicKey);
if (decodedPublicKey.Length != 65)
{
throw new ArgumentException(@"Vapid public key must be 65 characters long when decoded");
}
}
/// <summary>
/// This method takes the required VAPID parameters and returns the required
/// header to be added to a Web Push Protocol Request.
/// </summary>
/// <param name="audience">This must be the origin of the push service.</param>
/// <param name="subject">This should be a URL or a 'mailto:' email address</param>
/// <param name="publicKey">The VAPID public key as a base64 encoded string</param>
/// <param name="privateKey">The VAPID private key as a base64 encoded string</param>
/// <param name="expiration">The expiration of the VAPID JWT.</param>
/// <returns>A dictionary of header key/value pairs.</returns>
public static Dictionary <string, string> GetVapidHeaders(string audience, string subject, string publicKey,
string privateKey, long expiration = -1)
{
ValidateAudience(audience);
ValidateSubject(subject);
ValidatePublicKey(publicKey);
ValidatePrivateKey(privateKey);
var decodedPrivateKey = UrlBase64.Decode(privateKey);
if (expiration == -1)
{
expiration = UnixTimeNow() + 43200;
}
var header = new Dictionary <string, object>();
header.Add("typ", "JWT");
header.Add("alg", "ES256");
var jwtPayload = new Dictionary <string, object>();
jwtPayload.Add("aud", audience);
jwtPayload.Add("exp", expiration);
jwtPayload.Add("sub", subject);
var signingKey = ECKeyHelper.GetPrivateKey(decodedPrivateKey);
var signer = new JWSSigner(signingKey);
var token = signer.GenerateSignature(header, jwtPayload);
var results = new Dictionary <string, string>();
results.Add("Authorization", "WebPush " + token);
results.Add("Crypto-Key", "p256ecdsa=" + publicKey);
return(results);
}