2 * Copyright 2001-2010 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 "Application.h"
28 # include "ServiceProvider.h"
29 # include "SessionCache.h"
30 # include "attribute/resolver/ResolutionContext.h"
31 # include <saml/exceptions.h>
32 # include <saml/SAMLConfig.h>
33 # include <saml/binding/SecurityPolicy.h>
34 # include <saml/binding/SecurityPolicyRule.h>
35 # include <saml/saml1/core/Assertions.h>
36 # include <saml/saml1/core/Protocols.h>
37 # include <saml/saml2/metadata/Metadata.h>
38 # include <xmltooling/io/HTTPRequest.h>
39 # include <xmltooling/util/DateTime.h>
40 using namespace opensaml::saml1;
41 using namespace opensaml::saml1p;
42 using namespace opensaml;
44 using saml2::NameIDBuilder;
45 using saml2md::EntityDescriptor;
46 using saml2md::SPSSODescriptor;
47 using saml2md::MetadataException;
49 # include "lite/SAMLConstants.h"
52 using namespace shibsp;
53 using namespace xmltooling;
58 #if defined (_MSC_VER)
59 #pragma warning( push )
60 #pragma warning( disable : 4250 )
63 class SHIBSP_DLLLOCAL SAML1Consumer : public AssertionConsumerService
66 SAML1Consumer(const DOMElement* e, const char* appId)
67 : AssertionConsumerService(e, appId, Category::getInstance(SHIBSP_LOGCAT".SSO.SAML1")) {
70 m_post = XMLString::equals(getString("Binding").second, samlconstants::SAML1_PROFILE_BROWSER_POST);
71 if (SPConfig::getConfig().isEnabled(SPConfig::OutOfProcess))
72 m_ssoRule = SAMLConfig::getConfig().SecurityPolicyRuleManager.newPlugin(SAML1BROWSERSSO_POLICY_RULE, e);
75 virtual ~SAML1Consumer() {
82 void generateMetadata(SPSSODescriptor& role, const char* handlerURL) const {
83 AssertionConsumerService::generateMetadata(role, handlerURL);
84 role.addSupport(samlconstants::SAML11_PROTOCOL_ENUM);
85 role.addSupport(samlconstants::SAML10_PROTOCOL_ENUM);
89 void implementProtocol(
90 const Application& application,
91 const HTTPRequest& httpRequest,
92 HTTPResponse& httpResponse,
93 SecurityPolicy& policy,
95 const XMLObject& xmlObject
99 SecurityPolicyRule* m_ssoRule;
101 const XMLCh* getProtocolFamily() const {
102 return samlconstants::SAML11_PROTOCOL_ENUM;
107 #if defined (_MSC_VER)
108 #pragma warning( pop )
111 Handler* SHIBSP_DLLLOCAL SAML1ConsumerFactory(const pair<const DOMElement*,const char*>& p)
113 return new SAML1Consumer(p.first, p.second);
117 class SHIBSP_DLLLOCAL _rulenamed : std::unary_function<const SecurityPolicyRule*,bool>
120 _rulenamed(const char* name) : m_name(name) {}
121 bool operator()(const SecurityPolicyRule* rule) const {
122 return rule ? !strcmp(m_name, rule->getType()) : false;
132 void SAML1Consumer::implementProtocol(
133 const Application& application,
134 const HTTPRequest& httpRequest,
135 HTTPResponse& httpResponse,
136 SecurityPolicy& policy,
138 const XMLObject& xmlObject
141 // Implementation of SAML 1.x SSO profile(s).
142 m_log.debug("processing message against SAML 1.x SSO profile");
144 // Check for errors...this will throw if it's not a successful message.
145 checkError(&xmlObject);
147 // With the binding aspects now moved out to the MessageDecoder,
148 // the focus here is on the assertion content. For SAML 1.x POST,
149 // all the security comes from the protocol layer, and signing
150 // the assertion isn't sufficient. So we can check the policy
151 // object now and bail if it's not a secured message.
152 if (m_post && !policy.isAuthenticated()) {
153 if (policy.getIssuer() && !policy.getIssuerMetadata())
154 throw MetadataException("Security of SAML 1.x SSO POST response not established.");
155 throw SecurityPolicyException("Security of SAML 1.x SSO POST response not established.");
158 // Remember whether we already established trust.
159 bool alreadySecured = policy.isAuthenticated();
161 const Response* response = dynamic_cast<const Response*>(&xmlObject);
163 throw FatalProfileException("Incoming message was not a samlp:Response.");
165 const vector<saml1::Assertion*>& assertions = response->getAssertions();
166 if (assertions.empty())
167 throw FatalProfileException("Incoming message contained no SAML assertions.");
169 pair<bool,int> minor = response->getMinorVersion();
171 // Maintain list of "legit" tokens to feed to SP subsystems.
172 const AuthenticationStatement* ssoStatement=nullptr;
173 vector<const opensaml::Assertion*> tokens;
175 // Also track "bad" tokens that we'll cache but not use.
176 // This is necessary because there may be valid tokens not aimed at us.
177 vector<const opensaml::Assertion*> badtokens;
179 // With this flag on, we ignore any unsigned assertions.
180 const EntityDescriptor* entity = policy.getIssuerMetadata() ? dynamic_cast<const EntityDescriptor*>(policy.getIssuerMetadata()->getParent()) : nullptr;
181 pair<bool,bool> flag = application.getRelyingParty(entity)->getBool("requireSignedAssertions");
183 // authnskew allows rejection of SSO if AuthnInstant is too old.
184 const PropertySet* sessionProps = application.getPropertySet("Sessions");
185 pair<bool,unsigned int> authnskew = sessionProps ? sessionProps->getUnsignedInt("maxTimeSinceAuthn") : pair<bool,unsigned int>(false,0);
187 // Saves off error messages potentially helpful for users.
188 string contextualError;
190 // Ensure the BrowserSSO rule is in the policy set.
191 if (find_if(policy.getRules(), _rulenamed(SAML1BROWSERSSO_POLICY_RULE)) == nullptr)
192 policy.getRules().push_back(m_ssoRule);
194 // Populate recipient as audience.
195 policy.getAudiences().push_back(application.getRelyingParty(entity)->getXMLString("entityID").second);
197 time_t now = time(nullptr);
198 for (vector<saml1::Assertion*>::const_iterator a = assertions.begin(); a!=assertions.end(); ++a) {
200 // Skip unsigned assertion?
201 if (!(*a)->getSignature() && flag.first && flag.second)
202 throw SecurityPolicyException("The incoming assertion was unsigned, violating local security policy.");
204 // We clear the security flag, so we can tell whether the token was secured on its own.
205 policy.setAuthenticated(false);
208 // Extract message bits and re-verify Issuer information.
209 extractMessageDetails(
210 *(*a), (minor.first && minor.second==0) ? samlconstants::SAML10_PROTOCOL_ENUM : samlconstants::SAML11_PROTOCOL_ENUM, policy
213 // Run the policy over the assertion. Handles replay, freshness, and
214 // signature verification, assuming the relevant rules are configured,
215 // along with condition and profile enforcement.
216 policy.evaluate(*(*a), &httpRequest);
218 // If no security is in place now, we kick it.
219 if (!alreadySecured && !policy.isAuthenticated())
220 throw SecurityPolicyException("Unable to establish security of incoming assertion.");
222 // Track it as a valid token.
223 tokens.push_back(*a);
225 // Save off the first valid SSO statement.
226 const vector<AuthenticationStatement*>& statements = const_cast<const saml1::Assertion*>(*a)->getAuthenticationStatements();
227 for (vector<AuthenticationStatement*>::const_iterator s = statements.begin(); s!=statements.end(); ++s) {
228 if (authnskew.first && authnskew.second &&
229 (*s)->getAuthenticationInstant() && (now - (*s)->getAuthenticationInstantEpoch() > authnskew.second))
230 contextualError = "The gap between now and the time you logged into your identity provider exceeds the limit.";
231 else if (!ssoStatement) {
237 catch (exception& ex) {
238 m_log.warn("detected a problem with assertion: %s", ex.what());
240 contextualError = ex.what();
241 badtokens.push_back(*a);
246 if (contextualError.empty())
247 throw FatalProfileException("A valid authentication statement was not found in the incoming message.");
248 throw FatalProfileException(contextualError.c_str());
252 SubjectLocality* locality = ssoStatement->getSubjectLocality();
253 if (locality && locality->getIPAddress()) {
254 auto_ptr_char ip(locality->getIPAddress());
255 checkAddress(application, httpRequest, ip.get());
258 m_log.debug("SSO profile processing completed successfully");
260 NameIdentifier* n = ssoStatement->getSubject()->getNameIdentifier();
262 // Now we have to extract the authentication details for attribute and session setup.
264 // Session expiration for SAML 1.x is purely SP-driven, and the method is mapped to a ctx class.
265 pair<bool,unsigned int> lifetime = sessionProps ? sessionProps->getUnsignedInt("lifetime") : pair<bool,unsigned int>(true,28800);
266 if (!lifetime.first || lifetime.second == 0)
267 lifetime.second = 28800;
269 // We've successfully "accepted" at least one SSO token, along with any additional valid tokens.
270 // To complete processing, we need to extract and resolve attributes and then create the session.
272 // Normalize the SAML 1.x NameIdentifier...
273 auto_ptr<NameID> nameid(n ? NameIDBuilder::buildNameID() : nullptr);
275 nameid->setName(n->getName());
276 nameid->setFormat(n->getFormat());
277 nameid->setNameQualifier(n->getNameQualifier());
280 // The context will handle deleting attributes and new tokens.
281 auto_ptr<ResolutionContext> ctx(
284 policy.getIssuerMetadata(),
285 (!response->getMinorVersion().first || response->getMinorVersion().second==1) ?
286 samlconstants::SAML11_PROTOCOL_ENUM : samlconstants::SAML10_PROTOCOL_ENUM,
289 ssoStatement->getAuthenticationMethod(),
296 // Copy over any new tokens, but leave them in the context for cleanup.
297 tokens.insert(tokens.end(), ctx->getResolvedAssertions().begin(), ctx->getResolvedAssertions().end());
300 // Now merge in bad tokens for caching.
301 tokens.insert(tokens.end(), badtokens.begin(), badtokens.end());
303 application.getServiceProvider().getSessionCache()->insert(
307 now + lifetime.second,
309 (!response->getMinorVersion().first || response->getMinorVersion().second==1) ?
310 samlconstants::SAML11_PROTOCOL_ENUM : samlconstants::SAML10_PROTOCOL_ENUM,
312 ssoStatement->getAuthenticationInstant() ? ssoStatement->getAuthenticationInstant()->getRawData() : nullptr,
314 ssoStatement->getAuthenticationMethod(),
317 ctx.get() ? &ctx->getResolvedAttributes() : nullptr