public bool IsTokenValid(string accessToken)
{
if (!string.IsNullOrEmpty(accessToken) && !string.IsNullOrWhiteSpace(accessToken))
{
try
{
var parser = new JsonWebToken <AccessTokenPayload> .Parser(accessToken);
var payload = parser.GetPayload();
var sign = HashSignatureProvider.CreateHS256(secret);
var isValid = parser.Verify(sign);
var remainingExpDurationS = (payload.ExpirationDate - DateTime.UtcNow).TotalSeconds;
if (isValid && remainingExpDurationS > 0)
{
return(true);
}
}
catch
{
return(false);
}
}
return(false);
}
public string GenerateAccessToken(AccessTokenPayload tokenPayload)
{
var sign = HashSignatureProvider.CreateHS256(secret);
var jwt = new JsonWebToken <AccessTokenPayload>(tokenPayload, sign);
var str = jwt.ToEncodedString();
return(str);
}
/// <summary>
/// Creates a hash signature.
/// </summary>
/// <returns>HashSignatureProvider created from non-null environment value of "JWT_SECRET", or literal "secret"</returns>
private HashSignatureProvider Signature()
{
var secret = Environment.GetEnvironmentVariable("JWT_SECRET");
return(HashSignatureProvider.CreateHS256(secret ?? "secret"));
}