How can I use jwtsecuritytoken in my project ?

Question

User-978659149 posted

Hi, 

I create a project which need session tokens. User who is in the application connect with an authentication key after that for any module he wants to use, I will have a token, this token have an expiration date of 5 minutes for exemple and if there is no error have to be refresh.

I start to code something but I don't understand how to use JwtSecurityToken and i'm new in c#.

private string GenerateToken()
{
    SymmetricSecurityKey key = new SymmetricSecurityKey(Encoding.UTF8.GetBytes("ijustwanttotestsomething"));

    Claim[] claims = new Claim[]
     {
         new Claim(ClaimTypes.Name , "test")
     };

     JwtSecurityToken jwt = new JwtSecurityToken(
         issuer : "Blinkingcaret",
         audience : "Everyone",
         claims : claims,
         notBefore : DateTime.UtcNow,
         expires : DateTime.UtcNow.AddMinutes(1),
         signingCredentials : new SigningCredentials(key, SecurityAlgorithms.HmacSha256)
     );

     return new JwtSecurityTokenHandler().WriteToken(jwt);
}

[HttpPost]
public ActionResult<string> Create()
{
    return GenerateToken();
}

Can i have help to implement expiration and refresh in my project please ?

Answer 1

User765422875 posted

Expiration is implemented by setting the expires property, which you set to:

DateTime.UtcNow.AddMinutes(1)

JSON web tokens are used for Authorization and Information Exchange.

Refer to the following post on guidance.

https://www.meziantou.net/jwt-authentication-with-asp-net-core.htm

Answer 2

User-978659149 posted

Finally how can I test if the token is expired ?

I try the sample in your link but I have an error.

Answer 3

User665608656 posted

Hi soleyne,

Finally how can I test if the token is expired ?

I suggest you set the expiration time to be shorter. When the time is up, if you can't get the token, that's prove the token has expired.

I try the sample in your link but I have an error.

Can you provide your detailed error information?

You can aslo refer this link for more details:

JSON Web Token in ASP.NET Web API 2 using Owin

Best Regards,

YongQing.