use of org.opensaml.security.SecurityException in project cas by apereo.
the class WsFederationHelper method validateSignature.
/**
* validateSignature checks to see if the signature on an assertion is valid.
*
* @param assertion a provided assertion
* @param wsFederationConfiguration WS-Fed configuration provided.
* @return true if the assertion's signature is valid, otherwise false
*/
public boolean validateSignature(final Assertion assertion, final WsFederationConfiguration wsFederationConfiguration) {
if (assertion == null) {
LOGGER.warn("No assertion was provided to validate signatures");
return false;
}
boolean valid = false;
if (assertion.getSignature() != null) {
final SignaturePrevalidator validator = new SAMLSignatureProfileValidator();
try {
validator.validate(assertion.getSignature());
final CriteriaSet criteriaSet = new CriteriaSet();
criteriaSet.add(new UsageCriterion(UsageType.SIGNING));
criteriaSet.add(new EntityRoleCriterion(IDPSSODescriptor.DEFAULT_ELEMENT_NAME));
criteriaSet.add(new ProtocolCriterion(SAMLConstants.SAML20P_NS));
criteriaSet.add(new EntityIdCriterion(wsFederationConfiguration.getIdentityProviderIdentifier()));
try {
final SignatureTrustEngine engine = buildSignatureTrustEngine(wsFederationConfiguration);
valid = engine.validate(assertion.getSignature(), criteriaSet);
} catch (final SecurityException e) {
LOGGER.warn(e.getMessage(), e);
} finally {
if (!valid) {
LOGGER.warn("Signature doesn't match any signing credential.");
}
}
} catch (final SignatureException e) {
LOGGER.warn("Failed to validate assertion signature", e);
}
}
SamlUtils.logSamlObject(this.configBean, assertion);
return valid;
}
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