mirror of https://github.com/jacekkow/keycloak-protocol-cas

Matthias Piepkorn
2018-11-16 89e3d757b9f6893d16e5c3e49fc407aa1a003931
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
package org.keycloak.protocol.cas;
 
import org.apache.http.HttpEntity;
import org.jboss.logging.Logger;
import org.keycloak.common.util.KeycloakUriBuilder;
import org.keycloak.events.EventBuilder;
import org.keycloak.events.EventType;
import org.keycloak.forms.login.LoginFormsProvider;
import org.keycloak.models.*;
import org.keycloak.protocol.LoginProtocol;
import org.keycloak.protocol.cas.utils.LogoutHelper;
import org.keycloak.services.managers.ClientSessionCode;
import org.keycloak.services.managers.ResourceAdminManager;
import org.keycloak.sessions.AuthenticationSessionModel;
 
import javax.ws.rs.core.HttpHeaders;
import javax.ws.rs.core.Response;
import javax.ws.rs.core.UriInfo;
import java.io.IOException;
import java.net.URI;
 
public class CASLoginProtocol implements LoginProtocol {
    private static final Logger logger = Logger.getLogger(CASLoginProtocol.class);
 
    public static final String LOGIN_PROTOCOL = "cas";
 
    public static final String SERVICE_PARAM = "service";
    public static final String RENEW_PARAM = "renew";
    public static final String GATEWAY_PARAM = "gateway";
    public static final String TICKET_PARAM = "ticket";
    public static final String FORMAT_PARAM = "format";
 
    public static final String TICKET_RESPONSE_PARAM = "ticket";
 
    public static final String SERVICE_TICKET_PREFIX = "ST-";
    public static final String SESSION_SERVICE_TICKET = "service_ticket";
 
    public static final String LOGOUT_REDIRECT_URI = "CAS_LOGOUT_REDIRECT_URI";
 
    protected KeycloakSession session;
    protected RealmModel realm;
    protected UriInfo uriInfo;
    protected HttpHeaders headers;
    protected EventBuilder event;
 
    public CASLoginProtocol(KeycloakSession session, RealmModel realm, UriInfo uriInfo, HttpHeaders headers, EventBuilder event) {
        this.session = session;
        this.realm = realm;
        this.uriInfo = uriInfo;
        this.headers = headers;
        this.event = event;
    }
 
    public CASLoginProtocol() {
    }
 
    @Override
    public CASLoginProtocol setSession(KeycloakSession session) {
        this.session = session;
        return this;
    }
 
    @Override
    public CASLoginProtocol setRealm(RealmModel realm) {
        this.realm = realm;
        return this;
    }
 
    @Override
    public CASLoginProtocol setUriInfo(UriInfo uriInfo) {
        this.uriInfo = uriInfo;
        return this;
    }
 
    @Override
    public CASLoginProtocol setHttpHeaders(HttpHeaders headers) {
        this.headers = headers;
        return this;
    }
 
    @Override
    public CASLoginProtocol setEventBuilder(EventBuilder event) {
        this.event = event;
        return this;
    }
 
    @Override
    public Response authenticated(UserSessionModel userSession, ClientSessionContext clientSessionCtx) {
        AuthenticatedClientSessionModel clientSession = clientSessionCtx.getClientSession();
        ClientSessionCode<AuthenticatedClientSessionModel> accessCode = new ClientSessionCode<>(session, realm, clientSession);
 
        String service = clientSession.getRedirectUri();
        //TODO validate service
 
        String code = accessCode.getOrGenerateCode();
        KeycloakUriBuilder uriBuilder = KeycloakUriBuilder.fromUri(service);
        uriBuilder.queryParam(TICKET_RESPONSE_PARAM, SERVICE_TICKET_PREFIX + code);
 
        URI redirectUri = uriBuilder.build();
 
        Response.ResponseBuilder location = Response.status(302).location(redirectUri);
        return location.build();
    }
 
    @Override
    public Response sendError(AuthenticationSessionModel authSession, Error error) {
        return Response.serverError().entity(error).build();
    }
 
    @Override
    public void backchannelLogout(UserSessionModel userSession, AuthenticatedClientSessionModel clientSession) {
        String logoutUrl = clientSession.getRedirectUri();
        String serviceTicket = clientSession.getNote(CASLoginProtocol.SESSION_SERVICE_TICKET);
        //check if session is fully authenticated (i.e. serviceValidate has been called)
        if (serviceTicket != null && !serviceTicket.isEmpty()) {
            sendSingleLogoutRequest(logoutUrl, serviceTicket);
        }
        ClientModel client = clientSession.getClient();
        new ResourceAdminManager(session).logoutClientSession(uriInfo.getRequestUri(), realm, client, clientSession);
    }
 
    private void sendSingleLogoutRequest(String logoutUrl, String serviceTicket) {
        HttpEntity requestEntity = LogoutHelper.buildSingleLogoutRequest(serviceTicket);
        try {
            LogoutHelper.postWithRedirect(session, logoutUrl, requestEntity);
            logger.debug("Sent CAS single logout for service " + logoutUrl);
        } catch (IOException e) {
            logger.warn("Failed to call CAS service for logout: " + logoutUrl, e);
        }
    }
 
    @Override
    public Response frontchannelLogout(UserSessionModel userSession, AuthenticatedClientSessionModel clientSession) {
        // todo oidc redirect support
        throw new RuntimeException("NOT IMPLEMENTED");
    }
 
    @Override
    public Response finishLogout(UserSessionModel userSession) {
        String redirectUri = userSession.getNote(CASLoginProtocol.LOGOUT_REDIRECT_URI);
 
        event.event(EventType.LOGOUT);
        event.user(userSession.getUser()).session(userSession).success();
        LoginFormsProvider infoPage = session.getProvider(LoginFormsProvider.class).setSuccess("Logout successful");
        if (redirectUri != null) {
            infoPage.setAttribute("pageRedirectUri", redirectUri);
        } else {
            infoPage.setAttribute("skipLink", true);
        }
        return infoPage.createInfoPage();
    }
 
    @Override
    public boolean requireReauthentication(UserSessionModel userSession, AuthenticationSessionModel authSession) {
        return "true".equals(authSession.getClientNote(CASLoginProtocol.RENEW_PARAM));
    }
 
    @Override
    public void close() {
 
    }
}