private async Task <bool> InvokeAuthorizeEndpointAsync()
{
var authorizeRequest = new AuthorizeEndpointRequest(Context.Request.Query);
var clientContext = new OAuthValidateClientRedirectUriContext(
Context,
Options,
authorizeRequest.ClientId,
authorizeRequest.RedirectUri);
if (!String.IsNullOrEmpty(authorizeRequest.RedirectUri))
{
bool acceptableUri = true;
Uri validatingUri;
if (!Uri.TryCreate(authorizeRequest.RedirectUri, UriKind.Absolute, out validatingUri))
{
// The redirection endpoint URI MUST be an absolute URI
// http://tools.ietf.org/html/rfc6749#section-3.1.2
acceptableUri = false;
}
else if (!String.IsNullOrEmpty(validatingUri.Fragment))
{
// The endpoint URI MUST NOT include a fragment component.
// http://tools.ietf.org/html/rfc6749#section-3.1.2
acceptableUri = false;
}
else if (!Options.AllowInsecureHttp && !Request.IsHttps)
{
// The redirection endpoint SHOULD require the use of TLS
// http://tools.ietf.org/html/rfc6749#section-3.1.2.1
acceptableUri = false;
}
if (!acceptableUri)
{
clientContext.SetError(Constants.Errors.InvalidRequest);
return(await SendErrorRedirectAsync(clientContext, clientContext));
}
}
await Options.Provider.ValidateClientRedirectUri(clientContext);
if (!clientContext.IsValidated)
{
Logger.LogVerbose("Unable to validate client information");
return(await SendErrorRedirectAsync(clientContext, clientContext));
}
var validatingContext = new OAuthValidateAuthorizeRequestContext(
Context,
Options,
authorizeRequest,
clientContext);
if (string.IsNullOrEmpty(authorizeRequest.ResponseType))
{
Logger.LogVerbose("Authorize endpoint request missing required response_type parameter");
validatingContext.SetError(Constants.Errors.InvalidRequest);
}
else if (!authorizeRequest.IsAuthorizationCodeGrantType &&
!authorizeRequest.IsImplicitGrantType)
{
Logger.LogVerbose("Authorize endpoint request contains unsupported response_type parameter");
validatingContext.SetError(Constants.Errors.UnsupportedResponseType);
}
else
{
await Options.Provider.ValidateAuthorizeRequest(validatingContext);
}
if (!validatingContext.IsValidated)
{
// an invalid request is not processed further
return(await SendErrorRedirectAsync(clientContext, validatingContext));
}
_clientContext = clientContext;
_authorizeEndpointRequest = authorizeRequest;
var authorizeEndpointContext = new OAuthAuthorizeEndpointContext(Context, Options, authorizeRequest);
await Options.Provider.AuthorizeEndpoint(authorizeEndpointContext);
return(authorizeEndpointContext.IsRequestCompleted);
}
protected override async Task FinishResponseAsync()
{
//only successful results of an authorize request are altered
if (_clientContext == null ||
_authorizeEndpointRequest == null ||
Response.StatusCode != 200 ||
Context.User == null)
{
return;
}
var identities = new ClaimsPrincipal();
var properties = new AuthenticationProperties();
var returnParameter = new Dictionary <string, string>();
if (_authorizeEndpointRequest.IsAuthorizationCodeGrantType)
{
DateTimeOffset currentUtc = Options.SystemClock.UtcNow;
properties.IssuedUtc = currentUtc;
properties.ExpiresUtc = currentUtc.Add(Options.AuthorizationCodeExpireTimeSpan);
// associate client_id with all subsequent tickets
properties.Items[Constants.Extra.ClientId] = _authorizeEndpointRequest.ClientId;
if (!string.IsNullOrEmpty(_authorizeEndpointRequest.RedirectUri))
{
// keep original request parameter for later comparison
properties.Items[Constants.Extra.RedirectUri] = _authorizeEndpointRequest.RedirectUri;
}
var context = new AuthenticationTokenCreateContext(
Context,
Options.AuthorizationCodeFormat,
new AuthenticationTicket(Context.User, properties, Options.AuthenticationType));
await Options.AuthorizationCodeProvider.CreateAsync(context);
string code = context.Token;
if (string.IsNullOrEmpty(code))
{
Logger.LogError("response_type code requires an Options.AuthorizationCodeProvider implementing a single-use token.");
var errorContext = new OAuthValidateAuthorizeRequestContext(Context, Options, _authorizeEndpointRequest, _clientContext);
errorContext.SetError(Constants.Errors.UnsupportedResponseType);
await SendErrorRedirectAsync(_clientContext, errorContext);
return;
}
var authResponseContext = new OAuthAuthorizationEndpointResponseContext(
Context,
Options,
new AuthenticationTicket(Context.User, properties, Options.AuthenticationType),
_authorizeEndpointRequest,
null,
code);
await Options.Provider.AuthorizationEndpointResponse(authResponseContext);
foreach (var parameter in authResponseContext.AdditionalResponseParameters)
{
returnParameter[parameter.Key] = parameter.Value.ToString();
}
returnParameter[Constants.Parameters.Code] = code;
if (!String.IsNullOrEmpty(_authorizeEndpointRequest.State))
{
returnParameter[Constants.Parameters.State] = _authorizeEndpointRequest.State;
}
string location = string.Empty;
if (_authorizeEndpointRequest.IsFormPostResponseMode)
{
location = Options.FormPostEndpoint.ToString();
returnParameter[Constants.Parameters.RedirectUri] = _clientContext.RedirectUri;
}
else
{
location = _clientContext.RedirectUri;
}
foreach (var key in returnParameter.Keys)
{
location = WebUtilities.AddQueryString(location, key, returnParameter[key]);
}
Response.Redirect(location);
}
else if (_authorizeEndpointRequest.IsImplicitGrantType)
{
string location = _clientContext.RedirectUri;
DateTimeOffset currentUtc = Options.SystemClock.UtcNow;
properties.IssuedUtc = currentUtc;
properties.ExpiresUtc = currentUtc.Add(Options.AccessTokenExpireTimeSpan);
// associate client_id with access token
properties.Items[Constants.Extra.ClientId] = _authorizeEndpointRequest.ClientId;
var accessTokenContext = new AuthenticationTokenCreateContext(
Context,
Options.AccessTokenFormat,
new AuthenticationTicket(Context.User, properties, Options.AuthenticationType));
await Options.AccessTokenProvider.CreateAsync(accessTokenContext);
string accessToken = accessTokenContext.Token;
if (string.IsNullOrEmpty(accessToken))
{
accessToken = accessTokenContext.SerializeTicket();
}
DateTimeOffset?accessTokenExpiresUtc = accessTokenContext.Ticket.Properties.ExpiresUtc;
var appender = new Appender(location, '#');
appender
.Append(Constants.Parameters.AccessToken, accessToken)
.Append(Constants.Parameters.TokenType, Constants.TokenTypes.Bearer);
if (accessTokenExpiresUtc.HasValue)
{
TimeSpan?expiresTimeSpan = accessTokenExpiresUtc - currentUtc;
var expiresIn = (long)(expiresTimeSpan.Value.TotalSeconds + .5);
appender.Append(Constants.Parameters.ExpiresIn, expiresIn.ToString(CultureInfo.InvariantCulture));
}
if (!String.IsNullOrEmpty(_authorizeEndpointRequest.State))
{
appender.Append(Constants.Parameters.State, _authorizeEndpointRequest.State);
}
var authResponseContext = new OAuthAuthorizationEndpointResponseContext(
Context,
Options,
new AuthenticationTicket(Context.User, properties, Options.AuthenticationType),
_authorizeEndpointRequest,
accessToken,
null);
await Options.Provider.AuthorizationEndpointResponse(authResponseContext);
foreach (var parameter in authResponseContext.AdditionalResponseParameters)
{
appender.Append(parameter.Key, parameter.Value.ToString());
}
Response.Redirect(appender.ToString());
}
}
/// <summary>
/// Called for each request to the Authorize endpoint to determine if the request is valid and should continue.
/// The default behavior when using the OAuthAuthorizationServerProvider is to assume well-formed requests, with
/// validated client redirect URI, should continue processing. An application may add any additional constraints.
/// </summary>
/// <param name="context">The context of the event carries information in and results out.</param>
/// <returns>Task to enable asynchronous execution</returns>
public virtual Task ValidateAuthorizeRequest(OAuthValidateAuthorizeRequestContext context)
{
return(OnValidateAuthorizeRequest.Invoke(context));
}