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1 | <?php |
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2 | |||
3 | namespace AerialShip\SamlSPBundle\Bridge; |
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4 | |||
5 | use AerialShip\LightSaml\Bindings; |
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6 | use AerialShip\LightSaml\Model\Assertion\Assertion; |
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7 | use AerialShip\LightSaml\Model\Protocol\Response; |
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8 | use AerialShip\LightSaml\Model\XmlDSig\SignatureXmlValidator; |
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9 | use AerialShip\LightSaml\Security\KeyHelper; |
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10 | use AerialShip\SamlSPBundle\Config\ServiceInfo; |
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11 | use AerialShip\SamlSPBundle\Config\ServiceInfoCollection; |
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12 | use AerialShip\SamlSPBundle\RelyingParty\RelyingPartyInterface; |
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13 | use AerialShip\SamlSPBundle\State\Request\RequestStateStoreInterface; |
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14 | use AerialShip\SamlSPBundle\State\SSO\SSOStateStoreInterface; |
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15 | use Symfony\Component\HttpFoundation\Request; |
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16 | use Symfony\Component\Security\Core\Exception\AuthenticationException; |
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17 | |||
18 | class AssertionConsumer implements RelyingPartyInterface |
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19 | { |
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20 | /** @var BindingManager */ |
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21 | protected $bindingManager; |
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22 | |||
23 | /** @var ServiceInfoCollection */ |
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24 | protected $serviceInfoCollection; |
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25 | |||
26 | /** @var RequestStateStoreInterface */ |
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27 | protected $requestStore; |
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28 | |||
29 | /** @var SSOStateStoreInterface */ |
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30 | protected $ssoStore; |
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31 | |||
32 | |||
33 | |||
34 | |||
35 | public function __construct( |
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36 | BindingManager $bindingManager, |
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37 | ServiceInfoCollection $serviceInfoCollection, |
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38 | RequestStateStoreInterface $requestStore, |
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39 | SSOStateStoreInterface $ssoStore |
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40 | ) { |
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41 | $this->bindingManager = $bindingManager; |
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42 | $this->serviceInfoCollection = $serviceInfoCollection; |
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43 | $this->requestStore = $requestStore; |
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44 | $this->ssoStore = $ssoStore; |
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45 | } |
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46 | |||
47 | |||
48 | |||
49 | /** |
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50 | * @param \Symfony\Component\HttpFoundation\Request $request |
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51 | * @return bool |
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52 | */ |
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53 | public function supports(Request $request) |
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54 | { |
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55 | $result = $request->attributes->get('check_path') == $request->getPathInfo(); |
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56 | return $result; |
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57 | } |
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58 | |||
59 | /** |
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60 | * @param \Symfony\Component\HttpFoundation\Request $request |
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61 | * @throws \RuntimeException |
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62 | * @throws \Symfony\Component\Security\Core\Exception\AuthenticationException |
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63 | * @throws \InvalidArgumentException if cannot manage the Request |
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64 | * @return \Symfony\Component\HttpFoundation\RedirectResponse|SamlSpInfo |
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65 | */ |
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66 | public function manage(Request $request) |
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67 | { |
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68 | if (!$this->supports($request)) { |
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69 | throw new \InvalidArgumentException(); |
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70 | } |
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71 | |||
72 | $response = $this->getSamlResponse($request); |
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73 | $serviceInfo = $this->serviceInfoCollection->findByIDPEntityID($response->getIssuer()); |
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74 | |||
75 | if (!$serviceInfo) { |
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76 | throw new \RuntimeException('Could not find ServiceProvider with entity id: '.$response->getIssuer()); |
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77 | } |
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78 | |||
79 | $serviceInfo->getSpProvider()->setRequest($request); |
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80 | $this->validateResponse($serviceInfo, $response); |
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81 | |||
82 | $assertion = $this->getSingleAssertion($response); |
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83 | |||
84 | $this->createSSOState($serviceInfo, $assertion); |
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0 ignored issues
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85 | |||
86 | return new SamlSpInfo( |
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87 | $serviceInfo->getAuthenticationService(), |
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88 | $assertion->getSubject()->getNameID(), |
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89 | $assertion->getAllAttributes(), |
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90 | $assertion->getAuthnStatement() |
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91 | ); |
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92 | } |
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93 | |||
94 | |||
95 | protected function getSamlResponse(Request $request) |
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96 | { |
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97 | $bindingType = null; |
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98 | /** @var Response $response */ |
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99 | $response = $this->bindingManager->receive($request, $bindingType); |
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100 | if ($bindingType == Bindings::SAML2_HTTP_REDIRECT) { |
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101 | throw new \RuntimeException('SAML protocol response cannot be sent via binding HTTP REDIRECT'); |
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102 | } |
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103 | if (!$response instanceof Response) { |
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104 | throw new \RuntimeException('Expected Protocol/Response type but got '.($response ? get_class($response) : 'nothing')); |
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105 | } |
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106 | |||
107 | return $response; |
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108 | } |
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109 | |||
110 | /** |
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111 | * @param Response $response |
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112 | * @return Assertion |
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113 | * @throws \RuntimeException |
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114 | */ |
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115 | protected function getSingleAssertion(Response $response) |
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116 | { |
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117 | $arr = $response->getAllAssertions(); |
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118 | if (empty($arr)) { |
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119 | throw new \RuntimeException('No assertion received'); |
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120 | } |
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121 | $assertion = array_pop($arr); |
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122 | |||
123 | return $assertion; |
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124 | } |
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125 | |||
126 | |||
127 | protected function createSSOState(ServiceInfo $serviceInfo, Assertion $assertion) |
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128 | { |
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129 | $ssoState = $this->ssoStore->create(); |
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130 | $ssoState->setNameID($assertion->getSubject()->getNameID()->getValue()); |
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131 | $ssoState->setNameIDFormat($assertion->getSubject()->getNameID()->getFormat() ?: ''); |
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132 | $ssoState->setAuthenticationServiceName($serviceInfo->getAuthenticationService()); |
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133 | $ssoState->setProviderID($serviceInfo->getProviderID()); |
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134 | $ssoState->setSessionIndex($assertion->getAuthnStatement()->getSessionIndex()); |
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135 | $this->ssoStore->set($ssoState); |
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136 | |||
137 | return $ssoState; |
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138 | } |
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139 | |||
140 | |||
141 | protected function validateResponse(ServiceInfo $metaProvider, Response $response) |
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142 | { |
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143 | if (!$metaProvider) { |
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144 | throw new \RuntimeException('Unknown issuer '.$response->getIssuer()); |
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145 | } |
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146 | $this->validateState($response); |
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147 | $this->validateStatus($response); |
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148 | $this->validateResponseSignature($metaProvider, $response); |
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149 | foreach ($response->getAllAssertions() as $assertion) { |
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150 | $this->validateAssertion($metaProvider, $assertion); |
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151 | } |
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152 | } |
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153 | |||
154 | protected function validateState(Response $response) |
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155 | { |
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156 | if ($response->getInResponseTo()) { |
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157 | $requestState = $this->requestStore->get($response->getInResponseTo()); |
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158 | if (!$requestState) { |
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159 | throw new \RuntimeException('Got response to a request that was not made'); |
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160 | } |
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161 | if ($requestState->getDestination() != $response->getIssuer()) { |
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162 | throw new \RuntimeException('Got response from different issuer'); |
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163 | } |
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164 | $this->requestStore->remove($requestState); |
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165 | } |
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166 | } |
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167 | |||
168 | protected function validateStatus(Response $response) |
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169 | { |
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170 | if (!$response->getStatus()->isSuccess()) { |
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171 | $status = $response->getStatus()->getStatusCode()->getValue(); |
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172 | $status .= "\n".$response->getStatus()->getMessage(); |
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173 | if ($response->getStatus()->getStatusCode()->getChild()) { |
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174 | $status .= "\n".$response->getStatus()->getStatusCode()->getChild()->getValue(); |
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175 | } |
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176 | throw new AuthenticationException('Unsuccessful SAML response: '.$status); |
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177 | } |
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178 | } |
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179 | |||
180 | protected function validateResponseSignature(ServiceInfo $serviceInfo, Response $response) |
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181 | { |
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182 | /** @var $signature SignatureXmlValidator */ |
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183 | if ($signature = $response->getSignature()) { |
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184 | $keys = $this->getAllKeys($serviceInfo); |
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185 | $signature->validateMulti($keys); |
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186 | } |
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187 | } |
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188 | |||
189 | protected function validateAssertion(ServiceInfo $serviceInfo, Assertion $assertion) |
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190 | { |
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191 | $this->validateAssertionSignature($assertion, $serviceInfo); |
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192 | $this->validateAssertionTime($assertion); |
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193 | $this->validateAssertionSubjectTime($assertion); |
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194 | $this->validateSubjectConfirmationRecipient($assertion, $serviceInfo); |
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195 | } |
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196 | |||
197 | protected function validateAssertionSignature(Assertion $assertion, ServiceInfo $serviceInfo) |
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198 | { |
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199 | /** @var $signature SignatureXmlValidator */ |
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200 | if ($signature = $assertion->getSignature()) { |
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201 | $keys = $this->getAllKeys($serviceInfo); |
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202 | $signature->validateMulti($keys); |
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203 | } else { |
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204 | throw new AuthenticationException('Assertion must be signed'); |
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205 | } |
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206 | } |
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207 | |||
208 | |||
209 | /** |
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210 | * @param Assertion $assertion |
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211 | * @throws \Symfony\Component\Security\Core\Exception\AuthenticationException |
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212 | */ |
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213 | protected function validateAssertionTime(Assertion $assertion) |
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214 | { |
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215 | if ($assertion->getNotBefore() && $assertion->getNotBefore() > time() + 60) { |
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216 | throw new AuthenticationException('Received an assertion that is valid in the future. Check clock synchronization on IdP and SP'); |
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217 | } |
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218 | if ($assertion->getNotOnOrAfter() && $assertion->getNotOnOrAfter() <= time() - 60) { |
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219 | throw new AuthenticationException('Received an assertion that has expired. Check clock synchronization on IdP and SP'); |
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220 | } |
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221 | } |
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222 | |||
223 | /** |
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224 | * @param Assertion $assertion |
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225 | * @throws \Symfony\Component\Security\Core\Exception\AuthenticationException |
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226 | */ |
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227 | protected function validateAssertionSubjectTime(Assertion $assertion) |
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228 | { |
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229 | $arrSubjectConfirmations = $assertion->getSubject()->getSubjectConfirmations(); |
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230 | if ($arrSubjectConfirmations) { |
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0 ignored issues
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show
The expression
$arrSubjectConfirmations of type AerialShip\LightSaml\Mod...n\SubjectConfirmation[] is implicitly converted to a boolean; are you sure this is intended? If so, consider using ! empty($expr) instead to make it clear that you intend to check for an array without elements.
This check marks implicit conversions of arrays to boolean values in a comparison. While in PHP an empty array is considered to be equal (but not identical) to false, this is not always apparent. Consider making the comparison explicit by using
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231 | foreach ($arrSubjectConfirmations as $subjectConfirmation) { |
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232 | if ($data = $subjectConfirmation->getData()) { |
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233 | if ($data->getNotBefore() && $data->getNotBefore() > time() + 60) { |
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234 | throw new AuthenticationException('Received an assertion with a session valid in future. Check clock synchronization on IdP and SP'); |
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235 | } |
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236 | if ($data->getNotOnOrAfter() && $data->getNotOnOrAfter() <= time() - 60) { |
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237 | throw new AuthenticationException('Received an assertion with a session that has expired. Check clock synchronization on IdP and SP'); |
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238 | } |
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239 | } |
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240 | } |
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241 | } |
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242 | } |
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243 | |||
244 | |||
245 | protected function validateSubjectConfirmationRecipient(Assertion $assertion, ServiceInfo $serviceInfo) |
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246 | { |
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247 | $arrACS = $serviceInfo->getSpProvider() |
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248 | ->getEntityDescriptor() |
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249 | ->getFirstSpSsoDescriptor() |
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250 | ->findAssertionConsumerServices(); |
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251 | foreach ($assertion->getSubject()->getSubjectConfirmations() as $subjectConfirmation) { |
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252 | $ok = false; |
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253 | foreach ($arrACS as $acs) { |
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254 | if ($acs->getLocation() == $subjectConfirmation->getData()->getRecipient()) { |
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255 | $ok = true; |
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256 | break; |
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257 | } |
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258 | } |
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259 | if (!$ok) { |
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260 | throw new AuthenticationException( |
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261 | sprintf( |
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262 | 'Invalid Assertion SubjectConfirmation Recipient %s', |
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263 | $subjectConfirmation->getData()->getRecipient() |
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264 | ) |
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265 | ); |
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266 | } |
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267 | } |
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268 | } |
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269 | |||
270 | /** |
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271 | * @param ServiceInfo $metaProvider |
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272 | * @return \XMLSecurityKey[] |
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273 | */ |
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274 | protected function getAllKeys(ServiceInfo $metaProvider) |
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275 | { |
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276 | $result = array(); |
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277 | $edIDP = $metaProvider->getIdpProvider()->getEntityDescriptor(); |
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278 | if ($edIDP) { |
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279 | $arr = $edIDP->getAllIdpSsoDescriptors(); |
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280 | if ($arr) { |
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0 ignored issues
–
show
The expression
$arr of type array<AerialShip\LightSa...a\LoadFromXmlInterface> is implicitly converted to a boolean; are you sure this is intended? If so, consider using ! empty($expr) instead to make it clear that you intend to check for an array without elements.
This check marks implicit conversions of arrays to boolean values in a comparison. While in PHP an empty array is considered to be equal (but not identical) to false, this is not always apparent. Consider making the comparison explicit by using
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281 | $idp = $arr[0]; |
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282 | $keyDescriptors = $idp->getKeyDescriptors(); |
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283 | foreach ($keyDescriptors as $keyDescriptor) { |
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284 | $certificate = $keyDescriptor->getCertificate(); |
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285 | $result[] = KeyHelper::createPublicKey($certificate); |
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286 | } |
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287 | } |
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288 | } |
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289 | |||
290 | return $result; |
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291 | } |
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292 | |||
293 | /** |
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294 | * @param \AerialShip\SamlSPBundle\Config\ServiceInfo $metaProvider |
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295 | * @return null|\XMLSecurityKey |
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296 | */ |
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297 | protected function getSigningKey(ServiceInfo $metaProvider) |
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298 | { |
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299 | $result = null; |
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300 | $edIDP = $metaProvider->getIdpProvider()->getEntityDescriptor(); |
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301 | if ($edIDP) { |
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302 | $arr = $edIDP->getAllIdpSsoDescriptors(); |
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303 | if ($arr) { |
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0 ignored issues
–
show
The expression
$arr of type array<AerialShip\LightSa...a\LoadFromXmlInterface> is implicitly converted to a boolean; are you sure this is intended? If so, consider using ! empty($expr) instead to make it clear that you intend to check for an array without elements.
This check marks implicit conversions of arrays to boolean values in a comparison. While in PHP an empty array is considered to be equal (but not identical) to false, this is not always apparent. Consider making the comparison explicit by using
Loading history...
|
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304 | $idp = $arr[0]; |
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305 | $arr = $idp->findKeyDescriptors('signing'); |
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306 | if ($arr) { |
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307 | $keyDescriptor = $arr[0]; |
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308 | $certificate = $keyDescriptor->getCertificate(); |
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309 | $result = KeyHelper::createPublicKey($certificate); |
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310 | } |
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311 | } |
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312 | } |
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313 | |||
314 | return $result; |
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315 | } |
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316 | } |
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317 |
Unless you are absolutely sure that the expression can never be null because of other conditions, we strongly recommend to add an additional type check to your code: