OpenConext /
Stepup-Gateway
| Total Complexity | 40 |
| Total Lines | 276 |
| Duplicated Lines | 0 % |
| Changes | 2 | ||
| Bugs | 0 | Features | 0 |
Complex classes like CookieService often do a lot of different things. To break such a class down, we need to identify a cohesive component within that class. A common approach to find such a component is to look for fields/methods that share the same prefixes, or suffixes.
Once you have determined the fields that belong together, you can apply the Extract Class refactoring. If the component makes sense as a sub-class, Extract Subclass is also a candidate, and is often faster.
While breaking up the class, it is a good idea to analyze how other classes use CookieService, and based on these observations, apply Extract Interface, too.
| 1 | <?php declare(strict_types=1); |
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| 45 | class CookieService implements CookieServiceInterface |
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| 46 | { |
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| 47 | /** |
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| 48 | * @var CookieHelperInterface |
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| 49 | */ |
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| 50 | private $cookieHelper; |
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| 51 | /** |
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| 52 | * @var InstitutionConfigurationService |
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| 53 | */ |
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| 54 | private $institutionConfigurationService; |
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| 55 | /** |
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| 56 | * @var LoggerInterface |
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| 57 | */ |
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| 58 | private $logger; |
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| 59 | /** |
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| 60 | * @var SecondFactorService |
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| 61 | */ |
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| 62 | private $secondFactorService; |
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| 63 | |||
| 64 | /** |
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| 65 | * @var SecondFactorTypeService |
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| 66 | */ |
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| 67 | private $secondFactorTypeService; |
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| 68 | /** |
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| 69 | * @var ExpirationHelperInterface |
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| 70 | */ |
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| 71 | private $expirationHelper; |
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| 72 | |||
| 73 | public function __construct( |
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| 87 | } |
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| 88 | |||
| 89 | public function handleSsoOn2faCookieStorage( |
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| 90 | ResponseContext $responseContext, |
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| 91 | Request $request, |
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| 92 | Response $httpResponse, |
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| 93 | string $authenticationMode = 'sso' |
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| 94 | ): Response { |
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| 95 | // Check if this specific SP is configured to allow setting of an SSO on 2FA cookie (configured in MW config) |
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| 96 | $remoteSp = $this->getRemoteSp($responseContext); |
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| 97 | if (!$remoteSp->allowedToSetSsoCookieOn2fa()) { |
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| 98 | $this->logger->notice( |
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| 99 | sprintf( |
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| 100 | 'Ignoring SSO on 2FA for SP: %s', |
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| 101 | $remoteSp->getEntityId() |
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| 102 | ) |
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| 103 | ); |
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| 104 | return $httpResponse; |
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| 105 | } |
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| 106 | $secondFactorId = $responseContext->getSelectedSecondFactor(); |
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| 107 | |||
| 108 | // We can only set an SSO on 2FA cookie if a second factor authentication is being handled. |
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| 109 | if ($secondFactorId) { |
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| 110 | $secondFactor = $this->secondFactorService->findByUuid($secondFactorId); |
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| 111 | if (!$secondFactor) { |
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| 112 | throw new RuntimeException(sprintf('Second Factor token not found with ID: %s', $secondFactorId)); |
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| 113 | } |
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| 114 | // Test if the institution of the Identity this SF belongs to has SSO on 2FA enabled |
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| 115 | $isEnabled = $this->institutionConfigurationService->ssoOn2faEnabled($secondFactor->institution); |
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| 116 | $this->logger->notice( |
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| 117 | sprintf( |
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| 118 | 'SSO on 2FA is %senabled for %s', |
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| 119 | $isEnabled ? '' : 'not ', |
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| 120 | $secondFactor->institution |
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| 121 | ) |
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| 122 | ); |
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| 123 | if ($isEnabled) { |
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| 124 | // The cookie reader can return a NullCookie if the cookie is not present, was expired or was otherwise |
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| 125 | // deemed invalid. See the CookieHelper::read implementation for details. |
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| 126 | $ssoCookie = $this->read($request); |
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| 127 | $identityId = $responseContext->getIdentityNameId(); |
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| 128 | $loa = $secondFactor->getLoaLevel($this->secondFactorTypeService); |
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| 129 | $isValid = $this->isCookieValid($ssoCookie, $loa, $identityId); |
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| 130 | $isVerifiedBySsoOn2faCookie = $responseContext->isVerifiedBySsoOn2faCookie(); |
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| 131 | // Did the LoA requirement change? If a higher LoA was requested, or did a new token authentication |
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| 132 | // take place? In that case create a new SSO on 2FA cookie |
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| 133 | if ($this->shouldAddCookie($ssoCookie, $isValid, $loa, $isVerifiedBySsoOn2faCookie)) { |
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| 134 | $cookie = CookieValue::from($identityId, $secondFactor->secondFactorId, $loa); |
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| 135 | $this->store($httpResponse, $cookie); |
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| 136 | } |
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| 137 | } |
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| 138 | } |
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| 139 | $responseContext->finalizeAuthentication(); |
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| 140 | return $httpResponse; |
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| 141 | } |
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| 142 | |||
| 143 | /** |
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| 144 | * Allow high cyclomatic complexity in favour of keeping this method readable |
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| 145 | * @SuppressWarnings(PHPMD.CyclomaticComplexity) |
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| 146 | * @SuppressWarnings(PHPMD.NPathComplexity) |
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| 147 | */ |
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| 148 | public function shouldSkip2faAuthentication( |
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| 149 | ResponseContext $responseContext, |
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| 150 | float $requiredLoa, |
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| 151 | string $identityNameId, |
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| 152 | Collection $secondFactorCollection, |
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| 153 | Request $request |
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| 154 | ): bool { |
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| 155 | if ($responseContext->isForceAuthn()) { |
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| 156 | $this->logger->notice('Ignoring SSO on 2FA cookie when ForceAuthN is specified.'); |
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| 157 | return false; |
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| 158 | } |
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| 159 | $remoteSp = $this->getRemoteSp($responseContext); |
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| 160 | // Test if the SP allows SSO on 2FA to take place (configured in MW config) |
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| 161 | if (!$remoteSp->allowSsoOn2fa()) { |
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| 162 | $this->logger->notice( |
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| 163 | sprintf( |
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| 164 | 'Ignoring SSO on 2FA for SP: %s', |
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| 165 | $remoteSp->getEntityId() |
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| 166 | ) |
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| 167 | ); |
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| 168 | return false; |
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| 169 | } |
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| 170 | $ssoCookie = $this->read($request); |
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| 171 | // Perform validation on the cookie and its contents |
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| 172 | if (!$this->isCookieValid($ssoCookie, $requiredLoa, $identityNameId)) { |
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| 173 | return false; |
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| 174 | } |
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| 175 | if (!$this->secondFactorService->findByUuid($ssoCookie->secondFactorId())) { |
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| 176 | $this->logger->notice( |
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| 177 | 'The second factor stored in the SSO cookie was revoked or has otherwise became unknown to Gateway', |
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| 178 | [ |
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| 179 | 'secondFactorIdFromCookie' => $ssoCookie->secondFactorId() |
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| 180 | ] |
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| 181 | ); |
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| 182 | return false; |
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| 183 | } |
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| 184 | |||
| 185 | /** @var SecondFactor $secondFactor */ |
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| 186 | foreach ($secondFactorCollection as $secondFactor) { |
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| 187 | $loa = $secondFactor->getLoaLevel($this->secondFactorTypeService); |
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| 188 | if ($loa >= $requiredLoa) { |
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| 189 | $this->logger->notice('Verified the current 2FA authentication can be given with the SSO on 2FA cookie'); |
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| 190 | $responseContext->saveSelectedSecondFactor($secondFactor); |
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| 191 | return true; |
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| 192 | } |
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| 193 | } |
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| 194 | return false; |
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| 195 | } |
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| 196 | |||
| 197 | public function getCookieFingerprint(Request $request): string |
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| 198 | { |
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| 199 | return $this->cookieHelper->fingerprint($request); |
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| 200 | } |
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| 201 | |||
| 202 | /** |
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| 203 | * This method determines if an SSO on 2FA cookie should be created. |
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| 204 | * |
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| 205 | * The comments in the code block should give a good feel for what business rules |
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| 206 | * are applied in this method. |
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| 207 | * |
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| 208 | * @param CookieValueInterface $ssoCookie The SSO on 2FA cookie as read from the HTTP response |
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| 209 | * @param float $loa The LoA that was requested for this authentication, used to |
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| 210 | * compare to the LoA stored in the SSO cookie |
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| 211 | * @param bool $wasAuthenticatedWithSsoOn2faCookie Indicator if the currently running authentication was performed |
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| 212 | * with the SSO on 2FA cookie |
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| 213 | */ |
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| 214 | private function shouldAddCookie( |
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| 215 | CookieValueInterface $ssoCookie, |
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| 216 | bool $isCookieValid, |
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| 217 | float $loa, |
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| 218 | bool $wasAuthenticatedWithSsoOn2faCookie |
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| 219 | ): bool { |
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| 220 | // When the cookie is not yet set, was expired or was otherwise deemed invalid, we get a NullCookieValue |
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| 221 | // back from the reader. Indicating there is no valid cookie present. |
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| 222 | $cookieNotSet = $ssoCookie instanceof NullCookieValue; |
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| 223 | // OR the existing cookie does exist, but the LoA stored in that cookie does not match the required LoA |
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| 224 | $cookieDoesNotMeetLoaRequirement = ($ssoCookie instanceof CookieValue && !$ssoCookie->meetsRequiredLoa($loa)); |
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| 225 | if (!$ssoCookie instanceof NullCookieValue && $cookieDoesNotMeetLoaRequirement) { |
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| 226 | $this->logger->notice( |
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| 227 | sprintf( |
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| 228 | 'Storing new SSO on 2FA cookie as LoA requirement (%d changed to %d) changed', |
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| 229 | $ssoCookie->getLoa(), |
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| 230 | $loa |
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| 231 | ) |
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| 232 | ); |
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| 233 | } |
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| 234 | // OR when a new authentication took place, we replace the existing cookie with a new one |
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| 235 | if (!$wasAuthenticatedWithSsoOn2faCookie) { |
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| 236 | $this->logger->notice('Storing new SSO on 2FA cookie as a new authentication took place'); |
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| 237 | } |
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| 238 | |||
| 239 | // Or when the cookie is not valid for some reason (see logs for the specific error) |
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| 240 | if (!$isCookieValid) { |
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| 241 | $this->logger->notice('Storing new SSO on 2FA cookie, the current cookie is invalid'); |
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| 242 | } |
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| 243 | |||
| 244 | return $cookieNotSet || |
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| 245 | !$isCookieValid || |
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| 246 | $cookieDoesNotMeetLoaRequirement || |
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| 247 | !$wasAuthenticatedWithSsoOn2faCookie; |
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| 248 | } |
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| 249 | |||
| 250 | private function store(Response $response, CookieValueInterface $cookieValue) |
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| 253 | } |
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| 254 | |||
| 255 | private function read(Request $request): CookieValueInterface |
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| 256 | { |
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| 257 | try { |
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| 258 | return $this->cookieHelper->read($request); |
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| 259 | } catch (CookieNotFoundException $e) { |
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| 260 | $this->logger->notice('Attempt to decrypt the cookie failed, the cookie could not be found'); |
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| 261 | return new NullCookieValue(); |
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| 262 | } catch (DecryptionFailedException $e) { |
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| 263 | $this->logger->notice('Decryption of the SSO on 2FA cookie failed'); |
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| 264 | return new NullCookieValue(); |
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| 265 | } catch (Exception $e) { |
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| 266 | $this->logger->notice( |
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| 267 | 'Decryption failed, see original message in context', |
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| 268 | ['original-exception-message' => $e->getMessage()] |
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| 269 | ); |
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| 270 | return new NullCookieValue(); |
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| 271 | } |
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| 272 | } |
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| 273 | |||
| 274 | private function getRemoteSp(ResponseContext $responseContext): ServiceProvider |
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| 275 | { |
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| 276 | $remoteSp = $responseContext->getServiceProvider(); |
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| 277 | if (!$remoteSp) { |
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| 278 | throw new RuntimeException('SP not found in the response context, unable to continue with SSO on 2FA'); |
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| 279 | } |
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| 280 | return $remoteSp; |
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| 281 | } |
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| 282 | |||
| 283 | private function isCookieValid(CookieValueInterface $ssoCookie, float $requiredLoa, string $identityNameId): bool |
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| 321 | } |
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| 322 | } |
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| 323 |
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