How do I implement JWT authentication in ASP.NET?

How do I implement JWT authentication in ASP.NET?

To implement JWT authentication in ASP.NET, you need to configure your application to issue and validate JWT tokens. Start by installing the necessary NuGet packages like Microsoft.AspNetCore.Authentication.JwtBearer.

What are the steps to configure JWT in my ASP.NET project?

First, add the JWT bearer authentication in the Startup.cs file. Then, configure the token validation parameters, including the issuer, audience, and signing key.

Can you show me an example of the token generation code?

Sure! You can use the JwtSecurityTokenHandler to create a token. Here's a simple example:

var tokenHandler = new JwtSecurityTokenHandler();
var tokenDescriptor = new SecurityTokenDescriptor
{
    Subject = new ClaimsIdentity(new Claim[]
    {
        new Claim(ClaimTypes.Name, user.Username)
    }),
    Expires = DateTime.UtcNow.AddHours(1),
    SigningCredentials = new SigningCredentials(new SymmetricSecurityKey(Encoding.UTF8.GetBytes(secretKey)), SecurityAlgorithms.HmacSha256Signature)
};
var token = tokenHandler.CreateToken(tokenDescriptor);
return tokenHandler.WriteToken(token);

What should I do to secure my JWT tokens?

To secure your JWT tokens, ensure you use HTTPS, set a short expiration time, and store the tokens securely on the client side.