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AuthorizationServiceConfiguration.java
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AuthorizationServiceConfiguration.java
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/*
* Copyright 2015 The AppAuth for Android Authors. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
* in compliance with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software distributed under the
* License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
* express or implied. See the License for the specific language governing permissions and
* limitations under the License.
*/
package net.openid.appauth;
import static net.openid.appauth.Preconditions.checkArgument;
import static net.openid.appauth.Preconditions.checkNotNull;
import android.net.Uri;
import android.os.AsyncTask;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import net.openid.appauth.AuthorizationException.GeneralErrors;
import net.openid.appauth.connectivity.ConnectionBuilder;
import net.openid.appauth.connectivity.DefaultConnectionBuilder;
import net.openid.appauth.internal.Logger;
import org.json.JSONException;
import org.json.JSONObject;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
/**
* Configuration details required to interact with an authorization service.
*/
public class AuthorizationServiceConfiguration {
/**
* The standard base path for well-known resources on domains.
*
* @see "Defining Well-Known Uniform Resource Identifiers (RFC 5785)
* <https://tools.ietf.org/html/rfc5785>"
*/
public static final String WELL_KNOWN_PATH =
".well-known";
/**
* The standard resource under {@link #WELL_KNOWN_PATH .well-known} at which an OpenID Connect
* discovery document can be found under an issuer's base URI.
*
* @see "OpenID Connect discovery 1.0
* <https://openid.net/specs/openid-connect-discovery-1_0.html>"
*/
public static final String OPENID_CONFIGURATION_RESOURCE =
"openid-configuration";
private static final String KEY_AUTHORIZATION_ENDPOINT = "authorizationEndpoint";
private static final String KEY_TOKEN_ENDPOINT = "tokenEndpoint";
private static final String KEY_REGISTRATION_ENDPOINT = "registrationEndpoint";
private static final String KEY_DISCOVERY_DOC = "discoveryDoc";
private static final String KEY_END_SESSION_ENPOINT = "endSessionEndpoint";
/**
* The authorization service's endpoint.
*/
@NonNull
public final Uri authorizationEndpoint;
/**
* The authorization service's token exchange and refresh endpoint.
*/
@NonNull
public final Uri tokenEndpoint;
/**
* The end session service's endpoint;
*/
@Nullable
public final Uri endSessionEndpoint;
/**
* The authorization service's client registration endpoint.
*/
@Nullable
public final Uri registrationEndpoint;
/**
* The discovery document describing the service, if it is an OpenID Connect provider.
*/
@Nullable
public final AuthorizationServiceDiscovery discoveryDoc;
/**
* Creates a service configuration for a basic OAuth2 provider.
* @param authorizationEndpoint The
* [authorization endpoint URI](https://tools.ietf.org/html/rfc6749#section-3.1)
* for the service.
* @param tokenEndpoint The
* [token endpoint URI](https://tools.ietf.org/html/rfc6749#section-3.2)
* for the service.
*/
public AuthorizationServiceConfiguration(
@NonNull Uri authorizationEndpoint,
@NonNull Uri tokenEndpoint) {
this(authorizationEndpoint, tokenEndpoint, null);
}
/**
* Creates a service configuration for a basic OAuth2 provider.
* @param authorizationEndpoint The
* [authorization endpoint URI](https://tools.ietf.org/html/rfc6749#section-3.1)
* for the service.
* @param tokenEndpoint The
* [token endpoint URI](https://tools.ietf.org/html/rfc6749#section-3.2)
* for the service.
* @param registrationEndpoint The optional
* [client registration endpoint URI](https://tools.ietf.org/html/rfc7591#section-3)
*/
public AuthorizationServiceConfiguration(
@NonNull Uri authorizationEndpoint,
@NonNull Uri tokenEndpoint,
@Nullable Uri registrationEndpoint) {
this(authorizationEndpoint, tokenEndpoint, registrationEndpoint, null);
}
/**
* Creates a service configuration for a basic OAuth2 provider.
* @param authorizationEndpoint The
* [authorization endpoint URI](https://tools.ietf.org/html/rfc6749#section-3.1)
* for the service.
* @param tokenEndpoint The
* [token endpoint URI](https://tools.ietf.org/html/rfc6749#section-3.2)
* for the service.
* @param registrationEndpoint The optional
* [client registration endpoint URI](https://tools.ietf.org/html/rfc7591#section-3)
* @param endSessionEndpoint The optional
* [end session endpoint URI](https://tools.ietf.org/html/rfc6749#section-2.2)
* for the service.
*/
public AuthorizationServiceConfiguration(
@NonNull Uri authorizationEndpoint,
@NonNull Uri tokenEndpoint,
@Nullable Uri registrationEndpoint,
@Nullable Uri endSessionEndpoint) {
this.authorizationEndpoint = checkNotNull(authorizationEndpoint);
this.tokenEndpoint = checkNotNull(tokenEndpoint);
this.registrationEndpoint = registrationEndpoint;
this.endSessionEndpoint = endSessionEndpoint;
this.discoveryDoc = null;
}
/**
* Creates an service configuration for an OpenID Connect provider, based on its
* {@link AuthorizationServiceDiscovery discovery document}.
*
* @param discoveryDoc The OpenID Connect discovery document which describes this service.
*/
public AuthorizationServiceConfiguration(
@NonNull AuthorizationServiceDiscovery discoveryDoc) {
checkNotNull(discoveryDoc, "docJson cannot be null");
this.discoveryDoc = discoveryDoc;
this.authorizationEndpoint = discoveryDoc.getAuthorizationEndpoint();
this.tokenEndpoint = discoveryDoc.getTokenEndpoint();
this.registrationEndpoint = discoveryDoc.getRegistrationEndpoint();
this.endSessionEndpoint = discoveryDoc.getEndSessionEndpoint();
}
/**
* Converts the authorization service configuration to JSON for storage or transmission.
*/
@NonNull
public JSONObject toJson() {
JSONObject json = new JSONObject();
JsonUtil.put(json, KEY_AUTHORIZATION_ENDPOINT, authorizationEndpoint.toString());
JsonUtil.put(json, KEY_TOKEN_ENDPOINT, tokenEndpoint.toString());
if (registrationEndpoint != null) {
JsonUtil.put(json, KEY_REGISTRATION_ENDPOINT, registrationEndpoint.toString());
}
if (endSessionEndpoint != null) {
JsonUtil.put(json, KEY_END_SESSION_ENPOINT, endSessionEndpoint.toString());
}
if (discoveryDoc != null) {
JsonUtil.put(json, KEY_DISCOVERY_DOC, discoveryDoc.docJson);
}
return json;
}
/**
* Converts the authorization service configuration to a JSON string for storage or
* transmission.
*/
public String toJsonString() {
return toJson().toString();
}
/**
* Reads an Authorization service configuration from a JSON representation produced by the
* {@link #toJson()} method or some other equivalent producer.
*
* @throws JSONException if the provided JSON does not match the expected structure.
*/
@NonNull
public static AuthorizationServiceConfiguration fromJson(@NonNull JSONObject json)
throws JSONException {
checkNotNull(json, "json object cannot be null");
if (json.has(KEY_DISCOVERY_DOC)) {
try {
AuthorizationServiceDiscovery discoveryDoc =
new AuthorizationServiceDiscovery(json.optJSONObject(KEY_DISCOVERY_DOC));
return new AuthorizationServiceConfiguration(discoveryDoc);
} catch (AuthorizationServiceDiscovery.MissingArgumentException ex) {
throw new JSONException("Missing required field in discovery doc: "
+ ex.getMissingField());
}
} else {
checkArgument(json.has(KEY_AUTHORIZATION_ENDPOINT), "missing authorizationEndpoint");
checkArgument(json.has(KEY_TOKEN_ENDPOINT), "missing tokenEndpoint");
return new AuthorizationServiceConfiguration(
JsonUtil.getUri(json, KEY_AUTHORIZATION_ENDPOINT),
JsonUtil.getUri(json, KEY_TOKEN_ENDPOINT),
JsonUtil.getUriIfDefined(json, KEY_REGISTRATION_ENDPOINT),
JsonUtil.getUriIfDefined(json, KEY_END_SESSION_ENPOINT));
}
}
/**
* Reads an Authorization service configuration from a JSON representation produced by the
* {@link #toJson()} method or some other equivalent producer.
*
* @throws JSONException if the provided JSON does not match the expected structure.
*/
public static AuthorizationServiceConfiguration fromJson(@NonNull String jsonStr)
throws JSONException {
checkNotNull(jsonStr, "json cannot be null");
return AuthorizationServiceConfiguration.fromJson(new JSONObject(jsonStr));
}
/**
* Fetch an AuthorizationServiceConfiguration from an OpenID Connect issuer URI.
* This method is equivalent to {@link #fetchFromUrl(Uri, RetrieveConfigurationCallback)},
* but automatically appends the OpenID connect well-known configuration path to the
* URI.
*
* @param openIdConnectIssuerUri The issuer URI, e.g. "https://accounts.google.com"
* @param callback The callback to invoke upon completion.
*
* @see "OpenID Connect discovery 1.0
* <https://openid.net/specs/openid-connect-discovery-1_0.html>"
*/
public static void fetchFromIssuer(@NonNull Uri openIdConnectIssuerUri,
@NonNull RetrieveConfigurationCallback callback) {
fetchFromUrl(buildConfigurationUriFromIssuer(openIdConnectIssuerUri), callback);
}
/**
* Fetch an AuthorizationServiceConfiguration from an OpenID Connect issuer URI, using
* the {@link DefaultConnectionBuilder default connection builder}.
* This method is equivalent to {@link #fetchFromUrl(Uri, RetrieveConfigurationCallback,
* ConnectionBuilder)}, but automatically appends the OpenID connect well-known
* configuration path to the URI.
*
* @param openIdConnectIssuerUri The issuer URI, e.g. "https://accounts.google.com"
* @param connectionBuilder The connection builder that is used to establish a connection
* to the resource server.
* @param callback The callback to invoke upon completion.
* @see "OpenID Connect discovery 1.0
* <https://openid.net/specs/openid-connect-discovery-1_0.html>"
*/
public static void fetchFromIssuer(@NonNull Uri openIdConnectIssuerUri,
@NonNull RetrieveConfigurationCallback callback,
@NonNull ConnectionBuilder connectionBuilder) {
fetchFromUrl(buildConfigurationUriFromIssuer(openIdConnectIssuerUri),
callback,
connectionBuilder);
}
static Uri buildConfigurationUriFromIssuer(Uri openIdConnectIssuerUri) {
return openIdConnectIssuerUri.buildUpon()
.appendPath(WELL_KNOWN_PATH)
.appendPath(OPENID_CONFIGURATION_RESOURCE)
.build();
}
/**
* Fetch a AuthorizationServiceConfiguration from an OpenID Connect discovery URI, using
* the {@link DefaultConnectionBuilder default connection builder}.
*
* @param openIdConnectDiscoveryUri The OpenID Connect discovery URI
* @param callback A callback to invoke upon completion
*
* @see "OpenID Connect discovery 1.0
* <https://openid.net/specs/openid-connect-discovery-1_0.html>"
*/
public static void fetchFromUrl(@NonNull Uri openIdConnectDiscoveryUri,
@NonNull RetrieveConfigurationCallback callback) {
fetchFromUrl(openIdConnectDiscoveryUri,
callback,
DefaultConnectionBuilder.INSTANCE);
}
/**
* Fetch a AuthorizationServiceConfiguration from an OpenID Connect discovery URI.
*
* @param openIdConnectDiscoveryUri The OpenID Connect discovery URI
* @param connectionBuilder The connection builder that is used to establish a connection
* to the resource server.
* @param callback A callback to invoke upon completion
*
* @see "OpenID Connect discovery 1.0
* <https://openid.net/specs/openid-connect-discovery-1_0.html>"
*/
public static void fetchFromUrl(
@NonNull Uri openIdConnectDiscoveryUri,
@NonNull RetrieveConfigurationCallback callback,
@NonNull ConnectionBuilder connectionBuilder) {
checkNotNull(openIdConnectDiscoveryUri, "openIDConnectDiscoveryUri cannot be null");
checkNotNull(callback, "callback cannot be null");
checkNotNull(connectionBuilder, "connectionBuilder must not be null");
new ConfigurationRetrievalAsyncTask(
openIdConnectDiscoveryUri,
connectionBuilder,
callback)
.execute();
}
/**
* Callback interface for configuration retrieval.
* @see AuthorizationServiceConfiguration#fetchFromUrl(Uri,RetrieveConfigurationCallback)
*/
public interface RetrieveConfigurationCallback {
/**
* Invoked when the retrieval of the discovery doc completes successfully or fails.
*
* <p>Exactly one of `serviceConfiguration` or `ex` will be non-null. If
* `serviceConfiguration` is `null`, a failure occurred during the request. This
* can happen if a bad URL was provided, no connection to the server could be established,
* or the retrieved JSON is incomplete or badly formatted.
*
* @param serviceConfiguration the service configuration that can be used to initialize
* the {@link AuthorizationService}, if retrieval was successful; `null` otherwise.
* @param ex the exception that caused an error.
*/
void onFetchConfigurationCompleted(
@Nullable AuthorizationServiceConfiguration serviceConfiguration,
@Nullable AuthorizationException ex);
}
/**
* ASyncTask that tries to retrieve the discover document and gives the callback with the
* values retrieved from the discovery document. In case of retrieval error, the exception
* is handed back to the callback.
*/
private static class ConfigurationRetrievalAsyncTask
extends AsyncTask<Void, Void, AuthorizationServiceConfiguration> {
private Uri mUri;
private ConnectionBuilder mConnectionBuilder;
private RetrieveConfigurationCallback mCallback;
private AuthorizationException mException;
ConfigurationRetrievalAsyncTask(
Uri uri,
ConnectionBuilder connectionBuilder,
RetrieveConfigurationCallback callback) {
mUri = uri;
mConnectionBuilder = connectionBuilder;
mCallback = callback;
mException = null;
}
@Override
protected AuthorizationServiceConfiguration doInBackground(Void... voids) {
InputStream is = null;
try {
HttpURLConnection conn = mConnectionBuilder.openConnection(mUri);
conn.setRequestMethod("GET");
conn.setDoInput(true);
conn.connect();
is = conn.getInputStream();
JSONObject json = new JSONObject(Utils.readInputStream(is));
AuthorizationServiceDiscovery discovery =
new AuthorizationServiceDiscovery(json);
return new AuthorizationServiceConfiguration(discovery);
} catch (IOException ex) {
Logger.errorWithStack(ex, "Network error when retrieving discovery document");
mException = AuthorizationException.fromTemplate(
GeneralErrors.NETWORK_ERROR,
ex);
} catch (JSONException ex) {
Logger.errorWithStack(ex, "Error parsing discovery document");
mException = AuthorizationException.fromTemplate(
GeneralErrors.JSON_DESERIALIZATION_ERROR,
ex);
} catch (AuthorizationServiceDiscovery.MissingArgumentException ex) {
Logger.errorWithStack(ex, "Malformed discovery document");
mException = AuthorizationException.fromTemplate(
GeneralErrors.INVALID_DISCOVERY_DOCUMENT,
ex);
} finally {
Utils.closeQuietly(is);
}
return null;
}
@Override
protected void onPostExecute(AuthorizationServiceConfiguration configuration) {
if (mException != null) {
mCallback.onFetchConfigurationCompleted(null, mException);
} else {
mCallback.onFetchConfigurationCompleted(configuration, null);
}
}
}
}