2 * Copyright 2001-2009 Internet2
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
20 * SAML 1.x assertion consumer service
24 #include "handler/AssertionConsumerService.h"
27 # include "exceptions.h"
28 # include "Application.h"
29 # include "ServiceProvider.h"
30 # include "SessionCache.h"
31 # include "attribute/resolver/ResolutionContext.h"
32 # include <saml/SAMLConfig.h>
33 # include <saml/saml1/core/Assertions.h>
34 # include <saml/saml1/core/Protocols.h>
35 # include <saml/saml2/metadata/Metadata.h>
36 using namespace opensaml::saml1;
37 using namespace opensaml::saml1p;
38 using namespace opensaml;
40 using saml2::NameIDBuilder;
41 using saml2md::EntityDescriptor;
42 using saml2md::SPSSODescriptor;
43 using saml2md::MetadataException;
45 # include "lite/SAMLConstants.h"
48 using namespace shibsp;
49 using namespace xmltooling;
54 #if defined (_MSC_VER)
55 #pragma warning( push )
56 #pragma warning( disable : 4250 )
59 class SHIBSP_DLLLOCAL SAML1Consumer : public AssertionConsumerService
62 SAML1Consumer(const DOMElement* e, const char* appId)
63 : AssertionConsumerService(e, appId, Category::getInstance(SHIBSP_LOGCAT".SSO.SAML1")) {
66 m_post = XMLString::equals(getString("Binding").second, samlconstants::SAML1_PROFILE_BROWSER_POST);
67 if (SPConfig::getConfig().isEnabled(SPConfig::OutOfProcess))
68 m_ssoRule = SAMLConfig::getConfig().SecurityPolicyRuleManager.newPlugin(SAML1BROWSERSSO_POLICY_RULE, e);
71 virtual ~SAML1Consumer() {
78 void generateMetadata(SPSSODescriptor& role, const char* handlerURL) const {
79 AssertionConsumerService::generateMetadata(role, handlerURL);
80 role.addSupport(samlconstants::SAML11_PROTOCOL_ENUM);
81 role.addSupport(samlconstants::SAML10_PROTOCOL_ENUM);
85 void implementProtocol(
86 const Application& application,
87 const HTTPRequest& httpRequest,
88 HTTPResponse& httpResponse,
89 SecurityPolicy& policy,
90 const PropertySet* settings,
91 const XMLObject& xmlObject
95 SecurityPolicyRule* m_ssoRule;
99 #if defined (_MSC_VER)
100 #pragma warning( pop )
103 Handler* SHIBSP_DLLLOCAL SAML1ConsumerFactory(const pair<const DOMElement*,const char*>& p)
105 return new SAML1Consumer(p.first, p.second);
109 class SHIBSP_DLLLOCAL _rulenamed : std::unary_function<const SecurityPolicyRule*,bool>
112 _rulenamed(const char* name) : m_name(name) {}
113 bool operator()(const SecurityPolicyRule* rule) const {
114 return rule ? !strcmp(m_name, rule->getType()) : false;
124 void SAML1Consumer::implementProtocol(
125 const Application& application,
126 const HTTPRequest& httpRequest,
127 HTTPResponse& httpResponse,
128 SecurityPolicy& policy,
129 const PropertySet* settings,
130 const XMLObject& xmlObject
133 // Implementation of SAML 1.x SSO profile(s).
134 m_log.debug("processing message against SAML 1.x SSO profile");
136 // Check for errors...this will throw if it's not a successful message.
137 checkError(&xmlObject);
139 // With the binding aspects now moved out to the MessageDecoder,
140 // the focus here is on the assertion content. For SAML 1.x POST,
141 // all the security comes from the protocol layer, and signing
142 // the assertion isn't sufficient. So we can check the policy
143 // object now and bail if it's not a secured message.
144 if (m_post && !policy.isAuthenticated()) {
145 if (policy.getIssuer() && !policy.getIssuerMetadata())
146 throw MetadataException("Security of SAML 1.x SSO POST response not established.");
147 throw SecurityPolicyException("Security of SAML 1.x SSO POST response not established.");
150 // Remember whether we already established trust.
151 bool alreadySecured = policy.isAuthenticated();
153 const Response* response = dynamic_cast<const Response*>(&xmlObject);
155 throw FatalProfileException("Incoming message was not a samlp:Response.");
157 const vector<saml1::Assertion*>& assertions = response->getAssertions();
158 if (assertions.empty())
159 throw FatalProfileException("Incoming message contained no SAML assertions.");
161 pair<bool,int> minor = response->getMinorVersion();
163 // Maintain list of "legit" tokens to feed to SP subsystems.
164 const AuthenticationStatement* ssoStatement=NULL;
165 vector<const opensaml::Assertion*> tokens;
167 // Also track "bad" tokens that we'll cache but not use.
168 // This is necessary because there may be valid tokens not aimed at us.
169 vector<const opensaml::Assertion*> badtokens;
171 // With this flag on, we ignore any unsigned assertions.
172 const EntityDescriptor* entity = policy.getIssuerMetadata() ? dynamic_cast<const EntityDescriptor*>(policy.getIssuerMetadata()->getParent()) : NULL;
173 pair<bool,bool> flag = application.getRelyingParty(entity)->getBool("requireSignedAssertions");
175 // authnskew allows rejection of SSO if AuthnInstant is too old.
176 const PropertySet* sessionProps = application.getPropertySet("Sessions");
177 pair<bool,unsigned int> authnskew = sessionProps ? sessionProps->getUnsignedInt("maxTimeSinceAuthn") : pair<bool,unsigned int>(false,0);
179 // Saves off error messages potentially helpful for users.
180 string contextualError;
182 // Ensure the BrowserSSO rule is in the policy set.
183 if (find_if(policy.getRules(), _rulenamed(SAML1BROWSERSSO_POLICY_RULE)) == NULL)
184 policy.getRules().push_back(m_ssoRule);
186 // Populate recipient as audience.
187 policy.getAudiences().push_back(application.getRelyingParty(entity)->getXMLString("entityID").second);
189 time_t now = time(NULL);
190 for (vector<saml1::Assertion*>::const_iterator a = assertions.begin(); a!=assertions.end(); ++a) {
192 // Skip unsigned assertion?
193 if (!(*a)->getSignature() && flag.first && flag.second)
194 throw SecurityPolicyException("The incoming assertion was unsigned, violating local security policy.");
196 // We clear the security flag, so we can tell whether the token was secured on its own.
197 policy.setAuthenticated(false);
200 // Extract message bits and re-verify Issuer information.
201 extractMessageDetails(
202 *(*a), (minor.first && minor.second==0) ? samlconstants::SAML10_PROTOCOL_ENUM : samlconstants::SAML11_PROTOCOL_ENUM, policy
205 // Run the policy over the assertion. Handles replay, freshness, and
206 // signature verification, assuming the relevant rules are configured,
207 // along with condition and profile enforcement.
208 policy.evaluate(*(*a));
210 // If no security is in place now, we kick it.
211 if (!alreadySecured && !policy.isAuthenticated())
212 throw SecurityPolicyException("Unable to establish security of incoming assertion.");
214 // Track it as a valid token.
215 tokens.push_back(*a);
217 // Save off the first valid SSO statement.
218 const vector<AuthenticationStatement*>& statements = const_cast<const saml1::Assertion*>(*a)->getAuthenticationStatements();
219 for (vector<AuthenticationStatement*>::const_iterator s = statements.begin(); s!=statements.end(); ++s) {
220 if (authnskew.first && authnskew.second &&
221 (*s)->getAuthenticationInstant() && (now - (*s)->getAuthenticationInstantEpoch() > authnskew.second))
222 contextualError = "The gap between now and the time you logged into your identity provider exceeds the limit.";
223 else if (!ssoStatement) {
229 catch (exception& ex) {
230 m_log.warn("detected a problem with assertion: %s", ex.what());
232 contextualError = ex.what();
233 badtokens.push_back(*a);
238 if (contextualError.empty())
239 throw FatalProfileException("A valid authentication statement was not found in the incoming message.");
240 throw FatalProfileException(contextualError.c_str());
244 SubjectLocality* locality = ssoStatement->getSubjectLocality();
245 if (locality && locality->getIPAddress()) {
246 auto_ptr_char ip(locality->getIPAddress());
247 checkAddress(application, httpRequest, ip.get());
250 m_log.debug("SSO profile processing completed successfully");
252 NameIdentifier* n = ssoStatement->getSubject()->getNameIdentifier();
254 // Now we have to extract the authentication details for attribute and session setup.
256 // Session expiration for SAML 1.x is purely SP-driven, and the method is mapped to a ctx class.
257 pair<bool,unsigned int> lifetime = sessionProps ? sessionProps->getUnsignedInt("lifetime") : pair<bool,unsigned int>(true,28800);
258 if (!lifetime.first || lifetime.second == 0)
259 lifetime.second = 28800;
261 // We've successfully "accepted" at least one SSO token, along with any additional valid tokens.
262 // To complete processing, we need to extract and resolve attributes and then create the session.
264 // Normalize the SAML 1.x NameIdentifier...
265 auto_ptr<NameID> nameid(n ? NameIDBuilder::buildNameID() : NULL);
267 nameid->setName(n->getName());
268 nameid->setFormat(n->getFormat());
269 nameid->setNameQualifier(n->getNameQualifier());
272 // The context will handle deleting attributes and new tokens.
273 auto_ptr<ResolutionContext> ctx(
276 policy.getIssuerMetadata(),
277 (!response->getMinorVersion().first || response->getMinorVersion().second==1) ?
278 samlconstants::SAML11_PROTOCOL_ENUM : samlconstants::SAML10_PROTOCOL_ENUM,
281 ssoStatement->getAuthenticationMethod(),
288 // Copy over any new tokens, but leave them in the context for cleanup.
289 tokens.insert(tokens.end(), ctx->getResolvedAssertions().begin(), ctx->getResolvedAssertions().end());
292 // Now merge in bad tokens for caching.
293 tokens.insert(tokens.end(), badtokens.begin(), badtokens.end());
295 application.getServiceProvider().getSessionCache()->insert(
299 now + lifetime.second,
301 (!response->getMinorVersion().first || response->getMinorVersion().second==1) ?
302 samlconstants::SAML11_PROTOCOL_ENUM : samlconstants::SAML10_PROTOCOL_ENUM,
304 ssoStatement->getAuthenticationInstant() ? ssoStatement->getAuthenticationInstant()->getRawData() : NULL,
306 ssoStatement->getAuthenticationMethod(),
309 ctx.get() ? &ctx->getResolvedAttributes() : NULL