/// <summary>
/// Invoked whenever Purecloud succesfully 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(PurecloudAuthenticatedContext context)
{
return(OnAuthenticated(context));
}
protected override async Task <AuthenticationTicket> AuthenticateCoreAsync()
{
AuthenticationProperties properties = null;
try
{
string code = null;
string state = null;
IReadableStringCollection query = Request.Query;
IList <string> values = query.GetValues("error");
if (values != null && values.Count >= 1)
{
_logger.WriteVerbose("Remote server returned an error: " + Request.QueryString);
}
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(Options.CookieManager, properties, _logger))
{
return(new AuthenticationTicket(null, properties));
}
if (code == null)
{
// Null if the remote server returns an error.
return(new AuthenticationTicket(null, properties));
}
string requestPrefix = Request.Scheme + "://" + Request.Host;
string redirectUri = requestPrefix + Request.PathBase + Options.CallbackPath;
var content = new FormUrlEncodedContent(new[]
{
new KeyValuePair <string, string>("grant_type", "authorization_code"),
new KeyValuePair <string, string>("code", code),
new KeyValuePair <string, string>("redirect_uri", redirectUri)
});
var basicAuth = Convert.ToBase64String(Encoding.GetEncoding("ISO-8859-1")
.GetBytes($"{Options.AppId}:{Options.AppSecret}"));
string tokenRequest = "grant_type=authorization_code" +
"&code=" + Uri.EscapeDataString(code) +
"&redirect_uri=" + Uri.EscapeDataString(redirectUri) +
"&client_id=" + Uri.EscapeDataString(Options.AppId) +
"&client_secret=" + Uri.EscapeDataString(Options.AppSecret);
var client = new HttpClient();
client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Basic", basicAuth);
HttpResponseMessage tokenResponse = await client.PostAsync(Options.TokenEndpoint, content, Request.CallCancelled);
tokenResponse.EnsureSuccessStatusCode();
string text = await tokenResponse.Content.ReadAsStringAsync();
JObject response = JObject.Parse(text);
string accessToken = response.Value <string>("access_token");
if (string.IsNullOrWhiteSpace(accessToken))
{
_logger.WriteWarning("Access token was not found");
return(new AuthenticationTicket(null, properties));
}
string expires = response.Value <string>("expires_in");
var clientGetUser = new HttpClient();
clientGetUser.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", accessToken);
var userResponse = await clientGetUser.GetAsync(Options.UserInformationEndpoint, Request.CallCancelled);
userResponse.EnsureSuccessStatusCode();
text = await userResponse.Content.ReadAsStringAsync();
JObject user = JObject.Parse(text);
var context = new PurecloudAuthenticatedContext(Context, user, accessToken, expires);
context.Identity = new ClaimsIdentity(
Options.AuthenticationType,
ClaimsIdentity.DefaultNameClaimType,
ClaimsIdentity.DefaultRoleClaimType);
if (!string.IsNullOrEmpty(context.Id))
{
context.Identity.AddClaim(new Claim(ClaimTypes.NameIdentifier, context.Id, XmlSchemaString, Options.AuthenticationType));
}
if (!string.IsNullOrEmpty(context.UserName))
{
context.Identity.AddClaim(new Claim(ClaimsIdentity.DefaultNameClaimType, context.UserName, XmlSchemaString, Options.AuthenticationType));
}
if (!string.IsNullOrEmpty(context.Email))
{
context.Identity.AddClaim(new Claim(ClaimTypes.Email, context.Email, XmlSchemaString, Options.AuthenticationType));
}
if (!string.IsNullOrEmpty(context.Name))
{
context.Identity.AddClaim(new Claim("urn:Purecloud:name", context.Name, XmlSchemaString, Options.AuthenticationType));
// Many Purecloud accounts do not set the UserName field. Fall back to the Name field instead.
if (string.IsNullOrEmpty(context.UserName))
{
context.Identity.AddClaim(new Claim(ClaimsIdentity.DefaultNameClaimType, context.Name, XmlSchemaString, Options.AuthenticationType));
}
}
if (!string.IsNullOrEmpty(context.Link))
{
context.Identity.AddClaim(new Claim("urn:Purecloud:link", context.Link, 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));
}
}
