- // Check freshness.
- time_t now = time(NULL);
- if (response->getIssueInstant()->getEpoch() < now-(2*XMLToolingConfig::getConfig().clock_skew_secs))
- throw BindingException("Detected expired POST profile response.");
-
- // Check replay.
- ReplayCache* replayCache = SAMLConfig::getConfig().getReplayCache();
- if (replayCache) {
- auto_ptr_char id(response->getResponseID());
- if (!replayCache->check("SAML1POST", id.get(), response->getIssueInstant()->getEpoch() + (2*XMLToolingConfig::getConfig().clock_skew_secs))) {
- log.error("replay detected of response ID (%s)", id.get());
- throw BindingException("Rejecting replayed response ID ($1).", params(1,id.get()));
- }
- }
- else
- log.warn("replay cache was not provided, this is a serious security risk!");
-
- /* For SAML 1, the issuer can only be established from any assertions in the message.
- * Generally, errors aren't delivered like this, so there should be one.
- * The Issuer attribute is matched against metadata, and then trust checking can be
- * applied.
- */
- issuer = NULL;
- issuerTrusted = false;
- log.debug("attempting to establish issuer and integrity of message...");
- const vector<Assertion*>& assertions=const_cast<const Response*>(response)->getAssertions();
- if (!assertions.empty()) {
- log.debug("searching metadata for assertion issuer...");
- const EntityDescriptor* provider=
- metadataProvider ? metadataProvider->getEntityDescriptor(assertions.front()->getIssuer()) : NULL;
- if (provider) {
- log.debug("matched assertion issuer against metadata, searching for applicable role...");
- pair<bool,int> minor = response->getMinorVersion();
- issuer=provider->getRoleDescriptor(
- *role,
- (minor.first && minor.second==0) ? SAMLConstants::SAML10_PROTOCOL_ENUM : SAMLConstants::SAML11_PROTOCOL_ENUM
- );
- if (issuer) {
- if (trustEngine && response->getSignature()) {
- issuerTrusted = static_cast<const TrustEngine*>(trustEngine)->validate(
- *(response->getSignature()), *issuer, metadataProvider->getKeyResolver()
- );
- if (!issuerTrusted)
- log.error("unable to verify signature on message with supplied trust engine");
- }
- else {
- log.warn("unable to verify integrity of the message, leaving untrusted");
- }
- }
- else {
- log.warn(
- "unable to find compatible SAML 1.%d role (%s) in metadata",
- (minor.first && minor.second==0) ? 0 : 1,
- role->toString().c_str()
- );
- }
- if (log.isDebugEnabled()) {
- auto_ptr_char iname(assertions.front()->getIssuer());
- log.debug("message from (%s), integrity %sverified", iname.get(), issuerTrusted ? "" : "NOT ");
- }
- }
- else {
- auto_ptr_char temp(assertions.front()->getIssuer());
- log.warn("no metadata found, can't establish identity of issuer (%s)", temp.get());
- }
- }
- else {
- log.warn("no assertions found, can't establish identity of issuer");
- }