protected override async Task <AuthenticationTicket> AuthenticateCoreAsync()
{
AuthenticationProperties properties = null;
try
{
string code = null;
string state = null;
JObject id = null;
IReadableStringCollection query = Request.Query;
IList <string> values = query.GetValues("code");
if (values != null && values.Count == 1)
{
code = values[0];
}
values = query.GetValues("state");
if (values != null && values.Count == 1)
{
state = values[0];
}
properties = Options.StateDataFormat.Unprotect(state);
if (properties == null)
{
return(null);
}
// OAuth2 10.12 CSRF
if (!ValidateCorrelationId(properties, _logger))
{
return(new AuthenticationTicket(null, properties));
}
string requestPrefix = Request.Scheme + "://" + Request.Host;
string redirectUri = requestPrefix + Request.PathBase + Options.CallbackPath;
// Build up the body for the token request
var body = new List <KeyValuePair <string, string> >();
body.Add(new KeyValuePair <string, string>("grant_type", "authorization_code"));
body.Add(new KeyValuePair <string, string>("code", code));
body.Add(new KeyValuePair <string, string>("redirect_uri", redirectUri));
body.Add(new KeyValuePair <string, string>("client_id", Options.ClientId));
body.Add(new KeyValuePair <string, string>("client_secret", Options.ClientSecret));
// Request the token
var httpRequest =
new HttpRequestMessage(HttpMethod.Post, String.Format(TokenEndpointFormat, Options.Tenant));
httpRequest.Content = new FormUrlEncodedContent(body);
if (Options.RequestLogging)
{
_logger.WriteInformation(httpRequest.ToLogString());
}
var httpResponse = await _httpClient.SendAsync(httpRequest);
httpResponse.EnsureSuccessStatusCode();
string text = await httpResponse.Content.ReadAsStringAsync();
if (Options.ResponseLogging)
{
// Note: avoid using one of the Write* methods that takes a format string as input
// because the curly brackets from a JSON response will be interpreted as
// curly brackets for the format string and function will throw a FormatException
_logger.WriteInformation(httpResponse.ToLogString());
}
// Deserializes the token response
JObject response = JsonConvert.DeserializeObject <JObject>(text);
string accessToken = response.Value <string>("access_token");
string scope = response.Value <string>("scope");
string expires = response.Value <string>("expires_in");
string refreshToken = response.Value <string>("refresh_token");
string idToken = response.Value <string>("id_token");
// id_token should be a Base64 url encoded JSON web token
string[] segments;
if (!String.IsNullOrEmpty(idToken) && (segments = idToken.Split('.')).Length == 3)
{
string payload = base64urldecode(segments[1]);
if (!String.IsNullOrEmpty(payload))
{
id = JObject.Parse(payload);
}
}
var context = new MicrosoftOnlineAuthenticatedContext(Context, id, accessToken, scope, expires, refreshToken);
context.Identity = new ClaimsIdentity(
Options.AuthenticationType,
ClaimsIdentity.DefaultNameClaimType,
ClaimsIdentity.DefaultRoleClaimType);
if (!string.IsNullOrEmpty(context.Subject))
{
context.Identity.AddClaim(
new Claim(ClaimTypes.NameIdentifier, context.Subject, XmlSchemaString, Options.AuthenticationType));
}
if (!string.IsNullOrEmpty(context.Upn))
{
context.Identity.AddClaim(
new Claim(ClaimTypes.Upn, context.Upn, XmlSchemaString, Options.AuthenticationType));
}
if (!string.IsNullOrEmpty(context.Email))
{
context.Identity.AddClaim(
new Claim(ClaimTypes.Email, context.Email, XmlSchemaString, Options.AuthenticationType));
}
else
{
// get user email address from UserInfo endpoint
string userEmail = null;
var userRequest = new HttpRequestMessage(HttpMethod.Get, UserInfoEndpoint);
userRequest.Headers.Authorization = new AuthenticationHeaderValue("Bearer", accessToken);
var userResponse = await _httpClient.SendAsync(userRequest);
var userContent = await userResponse.Content.ReadAsStringAsync();
if (userResponse.IsSuccessStatusCode)
{
var userJson = JObject.Parse(userContent);
userEmail = userJson["EmailAddress"]?.Value <string>();
}
if (!string.IsNullOrEmpty(userEmail))
{
context.Email = userEmail;
context.Identity.AddClaim(
new Claim(ClaimTypes.Email, userEmail, XmlSchemaString, Options.AuthenticationType));
}
}
if (!string.IsNullOrEmpty(context.GivenName))
{
context.Identity.AddClaim(
new Claim(ClaimTypes.GivenName, context.GivenName, XmlSchemaString, Options.AuthenticationType));
}
if (!string.IsNullOrEmpty(context.FamilyName))
{
context.Identity.AddClaim(
new Claim(ClaimTypes.Surname, context.FamilyName, XmlSchemaString, Options.AuthenticationType));
}
if (!string.IsNullOrEmpty(context.Name))
{
context.Identity.AddClaim(
new Claim(ClaimsIdentity.DefaultNameClaimType, context.Name, XmlSchemaString, Options.AuthenticationType));
}
context.Properties = properties;
await Options.Provider.Authenticated(context);
return(new AuthenticationTicket(context.Identity, context.Properties));
}
catch (Exception ex)
{
_logger.WriteError("Authentication failed", ex);
return(new AuthenticationTicket(null, properties));
}
}
/// <summary>
/// Invoked whenever MicrosoftOnline successfully authenticates a user
/// </summary>
/// <param name="context">Contains information about the login session as well as the user <see cref="System.Security.Claims.ClaimsIdentity"/>.</param>
/// <returns>A <see cref="Task"/> representing the completed operation.</returns>
public virtual Task Authenticated(MicrosoftOnlineAuthenticatedContext context)
{
return(OnAuthenticated(context));
}
