saml/profile/impl/ConditionsRule.cpp

   1 /*
   2  *  Copyright 2009 Internet2
   3  *
   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
   7  *
   8  *     http://www.apache.org/licenses/LICENSE-2.0
   9  *
  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.
  15  */
  16
  17 /**
  18  * ConditionsRule.cpp
  19  *
  20  * SAML Conditions SecurityPolicyRule.
  21  */
  22
  23 #include "internal.h"
  24 #include "exceptions.h"
  25 #include "binding/SecurityPolicy.h"
  26 #include "binding/SecurityPolicyRule.h"
  27 #include "saml1/core/Assertions.h"
  28 #include "saml2/core/Assertions.h"
  29
  30 #include <xmltooling/logging.h>
  31 #include <xmltooling/XMLToolingConfig.h>
  32 #include <xmltooling/util/ParserPool.h>
  33
  34 using namespace opensaml;
  35 using namespace xmltooling::logging;
  36 using namespace xmltooling;
  37 using namespace std;
  38
  39 namespace opensaml {
  40     class SAML_DLLLOCAL ConditionsRule : public SecurityPolicyRule
  41     {
  42     public:
  43         ConditionsRule(const DOMElement* e);
  44
  45         virtual ~ConditionsRule() {
  46             for_each(m_rules.begin(), m_rules.end(), xmltooling::cleanup<SecurityPolicyRule>());
  47             if (m_doc)
  48                 m_doc->release();
  49         }
  50         const char* getType() const {
  51             return CONDITIONS_POLICY_RULE;
  52         }
  53         bool evaluate(const XMLObject& message, const GenericRequest* request, SecurityPolicy& policy) const;
  54
  55     private:
  56         DOMDocument* m_doc;
  57         vector<SecurityPolicyRule*> m_rules;
  58     };
  59
  60     SecurityPolicyRule* SAML_DLLLOCAL ConditionsRuleFactory(const DOMElement* const & e)
  61     {
  62         return new ConditionsRule(e);
  63     }
  64
  65     static const XMLCh Rule[] =     UNICODE_LITERAL_10(P,o,l,i,c,y,R,u,l,e);
  66     static const XMLCh type[] =     UNICODE_LITERAL_4(t,y,p,e);
  67
  68     const char config[] =
  69         "<PolicyRule type=\"Conditions\" xmlns:saml2=\"urn:oasis:names:tc:SAML:2.0:assertion\" xmlns:saml=\"urn:oasis:names:tc:SAML:1.0:assertion\">"
  70             "<PolicyRule type=\"Audience\"/>"
  71             "<PolicyRule type=\"Ignore\">saml:DoNotCacheCondition</PolicyRule>"
  72             "<PolicyRule type=\"Ignore\">saml2:OneTimeUse</PolicyRule>"
  73             "<PolicyRule type=\"Ignore\">saml2:ProxyRestriction</PolicyRule>"
  74         "</PolicyRule>";
  75 };
  76
  77 ConditionsRule::ConditionsRule(const DOMElement* e) : m_doc(NULL)
  78 {
  79     Category& log=Category::getInstance(SAML_LOGCAT".SecurityPolicyRule.Conditions");
  80
  81     if (!e || !e->hasChildNodes()) {
  82         // Default the configuration.
  83         istringstream in(config);
  84         m_doc = XMLToolingConfig::getConfig().getParser().parse(in);
  85         e = m_doc->getDocumentElement();
  86     }
  87
  88     e = XMLHelper::getFirstChildElement(e, Rule);
  89     while (e) {
  90         auto_ptr_char temp(e->getAttributeNS(NULL, type));
  91         if (temp.get() && *temp.get()) {
  92             try {
  93                 log.info("building SecurityPolicyRule of type %s", temp.get());
  94                 m_rules.push_back(SAMLConfig::getConfig().SecurityPolicyRuleManager.newPlugin(temp.get(),e));
  95             }
  96             catch (exception& ex) {
  97                 log.crit("error building SecurityPolicyRule: %s", ex.what());
  98             }
  99         }
 100         e = XMLHelper::getNextSiblingElement(e, Rule);
 101     }
 102 }
 103
 104 bool ConditionsRule::evaluate(const XMLObject& message, const GenericRequest* request, SecurityPolicy& policy) const
 105 {
 106     const saml2::Assertion* a2=dynamic_cast<const saml2::Assertion*>(&message);
 107     if (a2) {
 108         const saml2::Conditions* conds = a2->getConditions();
 109         if (!conds)
 110             return true;
 111
 112         // First verify the time conditions, using the specified timestamp.
 113         time_t now = policy.getTime();
 114         unsigned int skew = XMLToolingConfig::getConfig().clock_skew_secs;
 115         time_t t = conds->getNotBeforeEpoch();
 116         if (now + skew < t)
 117             throw SecurityPolicyException("Assertion is not yet valid.");
 118         t = conds->getNotOnOrAfterEpoch();
 119         if (t <= now - skew)
 120             throw SecurityPolicyException("Assertion is no longer valid.");
 121
 122         // Now we process conditions, starting with the known types and then extensions.
 123
 124         bool valid;
 125
 126         const vector<saml2::AudienceRestriction*>& acvec = conds->getAudienceRestrictions();
 127         for (vector<saml2::AudienceRestriction*>::const_iterator ac = acvec.begin(); ac != acvec.end(); ++ac) {
 128             valid = false;
 129             for (vector<SecurityPolicyRule*>::const_iterator r = m_rules.begin(); !valid && r != m_rules.end(); ++r)
 130                 valid = (*r)->evaluate(*(*ac), request, policy);
 131             if (!valid)
 132                 throw SecurityPolicyException("AudienceRestriction condition not successfully validated by policy.");
 133         }
 134
 135         const vector<saml2::OneTimeUse*>& otvec = conds->getOneTimeUses();
 136         for (vector<saml2::OneTimeUse*>::const_iterator ot = otvec.begin(); ot!=otvec.end(); ++ot) {
 137             valid = false;
 138             for (vector<SecurityPolicyRule*>::const_iterator r = m_rules.begin(); !valid && r != m_rules.end(); ++r)
 139                 valid = (*r)->evaluate(*(*ot), request, policy);
 140             if (!valid)
 141                 throw SecurityPolicyException("OneTimeUse condition not successfully validated by policy.");
 142         }
 143
 144         const vector<saml2::ProxyRestriction*> pvec = conds->getProxyRestrictions();
 145         for (vector<saml2::ProxyRestriction*>::const_iterator p = pvec.begin(); p != pvec.end(); ++p) {
 146             valid = false;
 147             for (vector<SecurityPolicyRule*>::const_iterator r = m_rules.begin(); !valid && r != m_rules.end(); ++r)
 148                 valid = (*r)->evaluate(*(*p), request, policy);
 149             if (!valid)
 150                 throw SecurityPolicyException("ProxyRestriction condition not successfully validated by policy.");
 151         }
 152
 153         const vector<saml2::Condition*>& convec = conds->getConditions();
 154         for (vector<saml2::Condition*>::const_iterator c = convec.begin(); c != convec.end(); ++c) {
 155             valid = false;
 156             for (vector<SecurityPolicyRule*>::const_iterator r = m_rules.begin(); !valid && r != m_rules.end(); ++r)
 157                 valid = (*r)->evaluate(*(*c), request, policy);
 158             if (!valid) {
 159                 throw SecurityPolicyException(
 160                     "Extension condition ($1) not successfully validated by policy.",
 161                     params(1,((*c)->getSchemaType() ? (*c)->getSchemaType()->toString().c_str() : "Unknown Type"))
 162                     );
 163             }
 164         }
 165
 166         return true;
 167     }
 168
 169     const saml1::Assertion* a1=dynamic_cast<const saml1::Assertion*>(&message);
 170     if (a1) {
 171         const saml1::Conditions* conds = a1->getConditions();
 172         if (!conds)
 173             return true;
 174
 175         // First verify the time conditions, using the specified timestamp.
 176         time_t now = policy.getTime();
 177         unsigned int skew = XMLToolingConfig::getConfig().clock_skew_secs;
 178         time_t t = conds->getNotBeforeEpoch();
 179         if (now + skew < t)
 180             throw SecurityPolicyException("Assertion is not yet valid.");
 181         t = conds->getNotOnOrAfterEpoch();
 182         if (t <= now - skew)
 183             throw SecurityPolicyException("Assertion is no longer valid.");
 184
 185         // Now we process conditions, starting with the known types and then extensions.
 186
 187         bool valid;
 188
 189         const vector<saml1::AudienceRestrictionCondition*>& acvec = conds->getAudienceRestrictionConditions();
 190         for (vector<saml1::AudienceRestrictionCondition*>::const_iterator ac = acvec.begin(); ac != acvec.end(); ++ac) {
 191             valid = false;
 192             for (vector<SecurityPolicyRule*>::const_iterator r = m_rules.begin(); !valid && r != m_rules.end(); ++r)
 193                 valid = (*r)->evaluate(*(*ac), request, policy);
 194             if (!valid)
 195                 throw SecurityPolicyException("AudienceRestrictionCondition not successfully validated by policy.");
 196         }
 197
 198         const vector<saml1::DoNotCacheCondition*>& dncvec = conds->getDoNotCacheConditions();
 199         for (vector<saml1::DoNotCacheCondition*>::const_iterator dnc = dncvec.begin(); dnc != dncvec.end(); ++dnc) {
 200             valid = false;
 201             for (vector<SecurityPolicyRule*>::const_iterator r = m_rules.begin(); !valid && r != m_rules.end(); ++r)
 202                 valid = (*r)->evaluate(*(*dnc), request, policy);
 203             if (!valid)
 204                 throw SecurityPolicyException("DoNotCacheCondition not successfully validated by policy.");
 205         }
 206
 207         const vector<saml1::Condition*>& convec = conds->getConditions();
 208         for (vector<saml1::Condition*>::const_iterator c = convec.begin(); c != convec.end(); ++c) {
 209             valid = false;
 210             for (vector<SecurityPolicyRule*>::const_iterator r = m_rules.begin(); !valid && r != m_rules.end(); ++r)
 211                 valid = (*r)->evaluate(*(*c), request, policy);
 212             if (!valid) {
 213                 throw SecurityPolicyException(
 214                     "Extension condition ($1) not successfully validated by policy.",
 215                     params(1,((*c)->getSchemaType() ? (*c)->getSchemaType()->toString().c_str() : (*c)->getElementQName().toString().c_str()))
 216                     );
 217             }
 218         }
 219
 220         return true;
 221     }
 222
 223     return false;
 224 }