.NetCore JwtBearerAuthentication not rejecting exp

问题:

I am generating JWT's to use with my WebApi project. I'm set the token to expire in one minute so that I can test if it rejects the token when submitted after the expiration date.

CreateToken Controller

public async Task<IActionResult> CreateToken([FromBody] CredentialModel model)
{
    var user = await _unitOfWork.UserManager.FindByNameAsync(model.UserName);

    if (user == null) return BadRequest();
    if (Hasher.VerifyHashedPassword(user, user.PasswordHash, model.Password) !=
        PasswordVerificationResult.Success) return BadRequest();

    var userClaims = await UserManager.GetClaimsAsync(user);

    var claims = new[]
    {
        new Claim(JwtRegisteredClaimNames.Sub, user.UserName),
        new Claim(JwtRegisteredClaimNames.Jti, Guid.NewGuid().ToString()),
        new Claim(JwtRegisteredClaimNames.Iat, DateTime.UtcNow.ToString()),
        new Claim(JwtRegisteredClaimNames.GivenName, user.FirstName), 
        new Claim(JwtRegisteredClaimNames.FamilyName, user.LastName),
        new Claim(JwtRegisteredClaimNames.Email, user.Email)
    }
    .Union(userClaims);

    var cert = new Certificate(Configuration["Tokens:Certificate"]);
    var token = new JwtSecurityToken(
        issuer: Configuration["Tokens:Issuer"],
        audience: Configuration["Tokens:Audience"],
        claims: claims,
        expires: DateTime.UtcNow.AddMinutes(1),
        signingCredentials: cert.Signature
    );

    return Ok(new
    {
        token = new JwtSecurityTokenHandler().WriteToken(token),
        expiration = token.ValidTo
    });
}

Token Authentication - Startup Class

app.UseJwtBearerAuthentication(new JwtBearerOptions()
{
    AutomaticAuthenticate = true,
    AutomaticChallenge = true,
    TokenValidationParameters = new TokenValidationParameters()
    {
        ValidIssuer = Configuration["Tokens:Issuer"],
        ValidAudience = Configuration["Tokens:Audience"],
        ValidateIssuerSigningKey = true,
        IssuerSigningKey = new Certificate(Configuration["Tokens:Certificate"]).SecurityKey,
        ValidateLifetime = true
    },
});

Although I am setting validateLifetime = true the tokes are not rejected two minutes later. It will keep accepting the token. Is there a minimum expiration time that I am not aware of or is my setup wrong?

回答1:

I stumbled over the answer here if anyone is interested.

app.UseJwtBearerAuthentication(new JwtBearerOptions()
{
    AutomaticAuthenticate = true,
    AutomaticChallenge = true,
    TokenValidationParameters = new TokenValidationParameters()
    {
        ValidIssuer = Configuration["Tokens:Issuer"],
        ValidAudience = Configuration["Tokens:Audience"],
        ValidateIssuerSigningKey = true,
        IssuerSigningKey = new Certificate(certPath: Configuration["Tokens:Certificate"], isValid: false).SecurityKey,
        ValidateLifetime = true,
        ValidateIssuer = true,
        ValidateAudience = true,
        ClockSkew = TimeSpan.Zero
    },
});