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/binding/SecurityPolicy.h>
34 # include <saml/saml1/core/Assertions.h>
35 # include <saml/saml1/core/Protocols.h>
36 # include <saml/saml2/metadata/Metadata.h>
37 using namespace opensaml::saml1;
38 using namespace opensaml::saml1p;
39 using namespace opensaml;
41 using saml2::NameIDBuilder;
42 using saml2md::EntityDescriptor;
43 using saml2md::SPSSODescriptor;
44 using saml2md::MetadataException;
46 # include "lite/SAMLConstants.h"
49 using namespace shibsp;
50 using namespace xmltooling;
55 #if defined (_MSC_VER)
56 #pragma warning( push )
57 #pragma warning( disable : 4250 )
60 class SHIBSP_DLLLOCAL SAML1Consumer : public AssertionConsumerService
63 SAML1Consumer(const DOMElement* e, const char* appId)
64 : AssertionConsumerService(e, appId, Category::getInstance(SHIBSP_LOGCAT".SSO.SAML1")) {
67 m_post = XMLString::equals(getString("Binding").second, samlconstants::SAML1_PROFILE_BROWSER_POST);
68 if (SPConfig::getConfig().isEnabled(SPConfig::OutOfProcess))
69 m_ssoRule = SAMLConfig::getConfig().SecurityPolicyRuleManager.newPlugin(SAML1BROWSERSSO_POLICY_RULE, e);
72 virtual ~SAML1Consumer() {
79 void generateMetadata(SPSSODescriptor& role, const char* handlerURL) const {
80 AssertionConsumerService::generateMetadata(role, handlerURL);
81 role.addSupport(samlconstants::SAML11_PROTOCOL_ENUM);
82 role.addSupport(samlconstants::SAML10_PROTOCOL_ENUM);
86 void implementProtocol(
87 const Application& application,
88 const HTTPRequest& httpRequest,
89 HTTPResponse& httpResponse,
90 SecurityPolicy& policy,
91 const PropertySet* settings,
92 const XMLObject& xmlObject
96 SecurityPolicyRule* m_ssoRule;
100 #if defined (_MSC_VER)
101 #pragma warning( pop )
104 Handler* SHIBSP_DLLLOCAL SAML1ConsumerFactory(const pair<const DOMElement*,const char*>& p)
106 return new SAML1Consumer(p.first, p.second);
110 class SHIBSP_DLLLOCAL _rulenamed : std::unary_function<const SecurityPolicyRule*,bool>
113 _rulenamed(const char* name) : m_name(name) {}
114 bool operator()(const SecurityPolicyRule* rule) const {
115 return rule ? !strcmp(m_name, rule->getType()) : false;
125 void SAML1Consumer::implementProtocol(
126 const Application& application,
127 const HTTPRequest& httpRequest,
128 HTTPResponse& httpResponse,
129 SecurityPolicy& policy,
130 const PropertySet* settings,
131 const XMLObject& xmlObject
134 // Implementation of SAML 1.x SSO profile(s).
135 m_log.debug("processing message against SAML 1.x SSO profile");
137 // Check for errors...this will throw if it's not a successful message.
138 checkError(&xmlObject);
140 // With the binding aspects now moved out to the MessageDecoder,
141 // the focus here is on the assertion content. For SAML 1.x POST,
142 // all the security comes from the protocol layer, and signing
143 // the assertion isn't sufficient. So we can check the policy
144 // object now and bail if it's not a secured message.
145 if (m_post && !policy.isAuthenticated()) {
146 if (policy.getIssuer() && !policy.getIssuerMetadata())
147 throw MetadataException("Security of SAML 1.x SSO POST response not established.");
148 throw SecurityPolicyException("Security of SAML 1.x SSO POST response not established.");
151 // Remember whether we already established trust.
152 bool alreadySecured = policy.isAuthenticated();
154 const Response* response = dynamic_cast<const Response*>(&xmlObject);
156 throw FatalProfileException("Incoming message was not a samlp:Response.");
158 const vector<saml1::Assertion*>& assertions = response->getAssertions();
159 if (assertions.empty())
160 throw FatalProfileException("Incoming message contained no SAML assertions.");
162 pair<bool,int> minor = response->getMinorVersion();
164 // Maintain list of "legit" tokens to feed to SP subsystems.
165 const AuthenticationStatement* ssoStatement=NULL;
166 vector<const opensaml::Assertion*> tokens;
168 // Also track "bad" tokens that we'll cache but not use.
169 // This is necessary because there may be valid tokens not aimed at us.
170 vector<const opensaml::Assertion*> badtokens;
172 // With this flag on, we ignore any unsigned assertions.
173 const EntityDescriptor* entity = policy.getIssuerMetadata() ? dynamic_cast<const EntityDescriptor*>(policy.getIssuerMetadata()->getParent()) : NULL;
174 pair<bool,bool> flag = application.getRelyingParty(entity)->getBool("requireSignedAssertions");
176 // authnskew allows rejection of SSO if AuthnInstant is too old.
177 const PropertySet* sessionProps = application.getPropertySet("Sessions");
178 pair<bool,unsigned int> authnskew = sessionProps ? sessionProps->getUnsignedInt("maxTimeSinceAuthn") : pair<bool,unsigned int>(false,0);
180 // Saves off error messages potentially helpful for users.
181 string contextualError;
183 // Ensure the BrowserSSO rule is in the policy set.
184 if (find_if(policy.getRules(), _rulenamed(SAML1BROWSERSSO_POLICY_RULE)) == NULL)
185 policy.getRules().push_back(m_ssoRule);
187 // Populate recipient as audience.
188 policy.getAudiences().push_back(application.getRelyingParty(entity)->getXMLString("entityID").second);
190 time_t now = time(NULL);
191 for (vector<saml1::Assertion*>::const_iterator a = assertions.begin(); a!=assertions.end(); ++a) {
193 // Skip unsigned assertion?
194 if (!(*a)->getSignature() && flag.first && flag.second)
195 throw SecurityPolicyException("The incoming assertion was unsigned, violating local security policy.");
197 // We clear the security flag, so we can tell whether the token was secured on its own.
198 policy.setAuthenticated(false);
201 // Extract message bits and re-verify Issuer information.
202 extractMessageDetails(
203 *(*a), (minor.first && minor.second==0) ? samlconstants::SAML10_PROTOCOL_ENUM : samlconstants::SAML11_PROTOCOL_ENUM, policy
206 // Run the policy over the assertion. Handles replay, freshness, and
207 // signature verification, assuming the relevant rules are configured,
208 // along with condition and profile enforcement.
209 policy.evaluate(*(*a), &httpRequest);
211 // If no security is in place now, we kick it.
212 if (!alreadySecured && !policy.isAuthenticated())
213 throw SecurityPolicyException("Unable to establish security of incoming assertion.");
215 // Track it as a valid token.
216 tokens.push_back(*a);
218 // Save off the first valid SSO statement.
219 const vector<AuthenticationStatement*>& statements = const_cast<const saml1::Assertion*>(*a)->getAuthenticationStatements();
220 for (vector<AuthenticationStatement*>::const_iterator s = statements.begin(); s!=statements.end(); ++s) {
221 if (authnskew.first && authnskew.second &&
222 (*s)->getAuthenticationInstant() && (now - (*s)->getAuthenticationInstantEpoch() > authnskew.second))
223 contextualError = "The gap between now and the time you logged into your identity provider exceeds the limit.";
224 else if (!ssoStatement) {
230 catch (exception& ex) {
231 m_log.warn("detected a problem with assertion: %s", ex.what());
233 contextualError = ex.what();
234 badtokens.push_back(*a);
239 if (contextualError.empty())
240 throw FatalProfileException("A valid authentication statement was not found in the incoming message.");
241 throw FatalProfileException(contextualError.c_str());
245 SubjectLocality* locality = ssoStatement->getSubjectLocality();
246 if (locality && locality->getIPAddress()) {
247 auto_ptr_char ip(locality->getIPAddress());
248 checkAddress(application, httpRequest, ip.get());
251 m_log.debug("SSO profile processing completed successfully");
253 NameIdentifier* n = ssoStatement->getSubject()->getNameIdentifier();
255 // Now we have to extract the authentication details for attribute and session setup.
257 // Session expiration for SAML 1.x is purely SP-driven, and the method is mapped to a ctx class.
258 pair<bool,unsigned int> lifetime = sessionProps ? sessionProps->getUnsignedInt("lifetime") : pair<bool,unsigned int>(true,28800);
259 if (!lifetime.first || lifetime.second == 0)
260 lifetime.second = 28800;
262 // We've successfully "accepted" at least one SSO token, along with any additional valid tokens.
263 // To complete processing, we need to extract and resolve attributes and then create the session.
265 // Normalize the SAML 1.x NameIdentifier...
266 auto_ptr<NameID> nameid(n ? NameIDBuilder::buildNameID() : NULL);
268 nameid->setName(n->getName());
269 nameid->setFormat(n->getFormat());
270 nameid->setNameQualifier(n->getNameQualifier());
273 // The context will handle deleting attributes and new tokens.
274 auto_ptr<ResolutionContext> ctx(
277 policy.getIssuerMetadata(),
278 (!response->getMinorVersion().first || response->getMinorVersion().second==1) ?
279 samlconstants::SAML11_PROTOCOL_ENUM : samlconstants::SAML10_PROTOCOL_ENUM,
282 ssoStatement->getAuthenticationMethod(),
289 // Copy over any new tokens, but leave them in the context for cleanup.
290 tokens.insert(tokens.end(), ctx->getResolvedAssertions().begin(), ctx->getResolvedAssertions().end());
293 // Now merge in bad tokens for caching.
294 tokens.insert(tokens.end(), badtokens.begin(), badtokens.end());
296 application.getServiceProvider().getSessionCache()->insert(
300 now + lifetime.second,
302 (!response->getMinorVersion().first || response->getMinorVersion().second==1) ?
303 samlconstants::SAML11_PROTOCOL_ENUM : samlconstants::SAML10_PROTOCOL_ENUM,
305 ssoStatement->getAuthenticationInstant() ? ssoStatement->getAuthenticationInstant()->getRawData() : NULL,
307 ssoStatement->getAuthenticationMethod(),
310 ctx.get() ? &ctx->getResolvedAttributes() : NULL