private async Task <bool> SendCryptographyResponseAsync(OpenIdConnectResponse response)
{
var request = Context.GetOpenIdConnectRequest();
if (request == null)
{
request = new OpenIdConnectRequest();
}
Context.SetOpenIdConnectResponse(response);
var notification = new ApplyCryptographyResponseContext(Context, Options, request, response);
await Options.Provider.ApplyCryptographyResponse(notification);
if (notification.HandledResponse)
{
return(true);
}
else if (notification.Skipped)
{
return(false);
}
return(await SendPayloadAsync(response));
}
private async Task <bool> SendCryptographyResponseAsync(OpenIdConnectResponse response)
{
var request = Context.GetOpenIdConnectRequest();
Context.SetOpenIdConnectResponse(response);
response.SetProperty(OpenIdConnectConstants.Properties.MessageType,
OpenIdConnectConstants.MessageTypes.CryptographyResponse);
var notification = new ApplyCryptographyResponseContext(Context, Options, request, response);
await Options.Provider.ApplyCryptographyResponse(notification);
if (notification.HandledResponse)
{
Logger.LogDebug("The discovery request was handled in user code.");
return(true);
}
else if (notification.Skipped)
{
Logger.LogDebug("The default discovery request handling was skipped from user code.");
return(false);
}
Logger.LogInformation("The discovery response was successfully returned: {Response}", response);
return(await SendPayloadAsync(response));
}
private async Task <bool> InvokeCryptographyEndpointAsync()
{
// Metadata requests must be made via GET.
// See http://openid.net/specs/openid-connect-discovery-1_0.html#ProviderConfigurationRequest
if (!string.Equals(Request.Method, "GET", StringComparison.OrdinalIgnoreCase))
{
Logger.LogError("The discovery request was rejected because an invalid " +
"HTTP method was used: {Method}.", Request.Method);
return(await SendErrorPayloadAsync(new OpenIdConnectMessage {
Error = OpenIdConnectConstants.Errors.InvalidRequest,
ErrorDescription = "Invalid HTTP method: make sure to use GET."
}));
}
var validatingContext = new ValidateCryptographyRequestContext(Context, Options);
await Options.Provider.ValidateCryptographyRequest(validatingContext);
if (!validatingContext.IsValidated)
{
Logger.LogInformation("The discovery request was rejected by application code.");
return(await SendErrorPayloadAsync(new OpenIdConnectMessage {
Error = validatingContext.Error ?? OpenIdConnectConstants.Errors.InvalidRequest,
ErrorDescription = validatingContext.ErrorDescription,
ErrorUri = validatingContext.ErrorUri
}));
}
var notification = new HandleCryptographyRequestContext(Context, Options);
foreach (var credentials in Options.SigningCredentials)
{
// Ignore the key if it's not supported.
if (!credentials.Key.IsSupportedAlgorithm(SecurityAlgorithms.RsaSha256Signature) &&
!credentials.Key.IsSupportedAlgorithm(SecurityAlgorithms.RsaSha384Signature) &&
!credentials.Key.IsSupportedAlgorithm(SecurityAlgorithms.RsaSha512Signature))
{
Logger.LogInformation("An unsupported signing key was ignored and excluded " +
"from the key set: {Type}. Only asymmetric security keys " +
"supporting RS256, RS384 or RS512 can be exposed " +
"via the JWKS endpoint.", credentials.Key.GetType().Name);
continue;
}
// Determine whether the security key is a RSA key embedded in a X.509 certificate.
var x509SecurityKey = credentials.Key as X509SecurityKey;
if (x509SecurityKey != null)
{
// Create a new JSON Web Key exposing the
// certificate instead of its public RSA key.
notification.Keys.Add(new JsonWebKey {
Use = JsonWebKeyUseNames.Sig,
Kty = JsonWebAlgorithmsKeyTypes.RSA,
// Resolve the JWA identifier from the algorithm specified in the credentials.
Alg = OpenIdConnectServerHelpers.GetJwtAlgorithm(credentials.Algorithm),
// Use the key identifier specified
// in the signing credentials.
Kid = credentials.Kid,
// x5t must be base64url-encoded.
// See http://tools.ietf.org/html/draft-ietf-jose-json-web-key-31#section-4.8
X5t = Base64UrlEncoder.Encode(x509SecurityKey.Certificate.GetCertHash()),
// Unlike E or N, the certificates contained in x5c
// must be base64-encoded and not base64url-encoded.
// See http://tools.ietf.org/html/draft-ietf-jose-json-web-key-31#section-4.7
X5c = { Convert.ToBase64String(x509SecurityKey.Certificate.RawData) }
});
}
var rsaSecurityKey = credentials.Key as RsaSecurityKey;
if (rsaSecurityKey != null)
{
// Export the RSA public key.
notification.Keys.Add(new JsonWebKey {
Use = JsonWebKeyUseNames.Sig,
Kty = JsonWebAlgorithmsKeyTypes.RSA,
// Resolve the JWA identifier from the algorithm specified in the credentials.
Alg = OpenIdConnectServerHelpers.GetJwtAlgorithm(credentials.Algorithm),
// Use the key identifier specified
// in the signing credentials.
Kid = credentials.Kid,
// Both E and N must be base64url-encoded.
// See http://tools.ietf.org/html/draft-ietf-jose-json-web-key-31#appendix-A.1
E = Base64UrlEncoder.Encode(rsaSecurityKey.Parameters.Exponent),
N = Base64UrlEncoder.Encode(rsaSecurityKey.Parameters.Modulus)
});
}
}
await Options.Provider.HandleCryptographyRequest(notification);
if (notification.HandledResponse)
{
return(true);
}
else if (notification.Skipped)
{
return(false);
}
var payload = new JObject();
var keys = new JArray();
foreach (var key in notification.Keys)
{
var item = new JObject();
// Ensure a key type has been provided.
// See http://tools.ietf.org/html/draft-ietf-jose-json-web-key-31#section-4.1
if (string.IsNullOrEmpty(key.Kty))
{
Logger.LogError("A JSON Web Key was excluded from the key set because " +
"it didn't contain the mandatory 'kid' parameter.");
continue;
}
// Create a dictionary associating the
// JsonWebKey components with their values.
var parameters = new Dictionary <string, string> {
[JsonWebKeyParameterNames.Kid] = key.Kid,
[JsonWebKeyParameterNames.Use] = key.Use,
[JsonWebKeyParameterNames.Kty] = key.Kty,
[JsonWebKeyParameterNames.Alg] = key.Alg,
[JsonWebKeyParameterNames.X5t] = key.X5t,
[JsonWebKeyParameterNames.X5u] = key.X5u,
[JsonWebKeyParameterNames.E] = key.E,
[JsonWebKeyParameterNames.N] = key.N
};
foreach (var parameter in parameters)
{
if (!string.IsNullOrEmpty(parameter.Value))
{
item.Add(parameter.Key, parameter.Value);
}
}
if (key.KeyOps.Any())
{
item.Add(JsonWebKeyParameterNames.KeyOps, JArray.FromObject(key.KeyOps));
}
if (key.X5c.Any())
{
item.Add(JsonWebKeyParameterNames.X5c, JArray.FromObject(key.X5c));
}
keys.Add(item);
}
payload.Add(JsonWebKeyParameterNames.Keys, keys);
var context = new ApplyCryptographyResponseContext(Context, Options, payload);
await Options.Provider.ApplyCryptographyResponse(context);
if (context.HandledResponse)
{
return(true);
}
else if (context.Skipped)
{
return(false);
}
using (var buffer = new MemoryStream())
using (var writer = new JsonTextWriter(new StreamWriter(buffer))) {
payload.WriteTo(writer);
writer.Flush();
Response.ContentLength = buffer.Length;
Response.ContentType = "application/json;charset=UTF-8";
buffer.Seek(offset: 0, loc: SeekOrigin.Begin);
await buffer.CopyToAsync(Response.Body, 4096, Context.RequestAborted);
return(true);
}
}
/// <summary> /// Called before the authorization server starts emitting the OpenID Connect JSON Web Key set associated with this instance. /// If the web application wishes to produce the JSON Web Key set directly in this call, it may write to the /// context.Response directly and should call context.RequestCompleted to stop the default behavior from executing. /// </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 ApplyCryptographyResponse(ApplyCryptographyResponseContext context) => OnApplyCryptographyResponse(context);
