/// <summary>
/// Called when a request to the Token endpoint arrives with a "grant_type" of "password". This occurs when the user has provided name and password
/// credentials directly into the client application's user interface, and the client application is using those to acquire an "access_token" and
/// optional "refresh_token". If the web application supports the
/// resource owner credentials grant type it must validate the context.Username and context.Password as appropriate. To issue an
/// access token the context.Validated must be called with a new ticket containing the claims about the resource owner which should be associated
/// with the access token. The application should take appropriate measures to ensure that the endpoint isn’t abused by malicious callers.
/// The default behavior is to reject this grant type.
/// See also http://tools.ietf.org/html/rfc6749#section-4.3.2
/// </summary>
/// <param name="context">The context of the event carries information in and results out.</param>
/// <returns>
/// Task to enable asynchronous execution
/// </returns>
public override async Task GrantResourceOwnerCredentials(OAuthGrantResourceOwnerCredentialsContext context)
{
var identity = new ClaimsIdentity(context.Options.AuthenticationType);
AppUser user = new AppUser();
using (AuthRepository repo = new AuthRepository())
{
user = repo.FindUser(context.UserName, context.Password);
if (user == null)
{
context.SetError("invalid_grant", "The user name or password is incorrect.");
return;
}
user.UserRoles = repo.GetUserRoles(user.Id);
if (user.Enabled == false)
{
context.SetError("invalid_grant", "The account is disabled.");
return;
}
}
identity.AddClaim(new Claim(ClaimTypes.Name, context.UserName));
identity.AddClaim(new Claim("sub", context.UserName));
foreach (string role in user.UserRoles)
{
identity.AddClaim(new Claim(ClaimTypes.Role, role));
}
var props = new AuthenticationProperties(new Dictionary<string, string>
{
{
"as:client_id", context.ClientId ?? string.Empty
},
{
"displayName", user.Firstname + ' ' + user.Lastname
},
{
"userName", user.UserName
},
{
"userRoles", string.Join(",",identity.Claims.Where(c=> c.Type == ClaimTypes.Role).Select(c => c.Value).ToArray())
}
});
var ticket = new AuthenticationTicket(identity, props);
context.Validated(ticket);
}
