SignatureValidation filter verifies that a metadata instance is signed correctly with a trusted key, and is the linchpin of the security of most Shibboleth deployments.
The "Sign and Expire" distribution model
SignatureValidationfilter and a
RequiredValidUntilfilter are often used together to securely obtain remote metadata via HTTP. See the
DynamicHTTPMetadataProvidertopics for explicit configuration examples. Other distribution models are discussed in the TrustManagement topic.
There are four approaches to supplying the trust policy to the
- A pointer to a certificate file
- A reference to an externally defined TrustEngine bean
- An inline
- An inline
Filter order is important!
<MetadataFilter> element and the type
SignatureValidation are defined by the
urn:mace:shibboleth:2.0:metadata schema, which can be located at http://shibboleth.net/schema/idp/shibboleth-metadata.xsd.
<security:TrustEngine> element is defined in the
urn:mace:shibboleth:2.0:security namespace, the schema for which is located at http://shibboleth.net/schema/idp/shibboleth-security.xsd
|Boolean||true||If true, this fails to load metadata with no signature on the root XML element.|
(DEPRECATED) Old version of
Path to a certificate file whose key is used to verify the signature.
|The ID of an externally defined CriteriaSet used as input the to the trust engine, not generally used.|
|Bean Reference||SAMLSignatureProfileValidator||The ID of an externally defined SignaturePrevalidator. Used to perform pre-validation of an XML Signature, for example to validate that the signature conforms to a particular profile of XML Signature.|
|Bean Reference||BasicDynamicTrustedNamesStrategy||The ID of an externally defined Function<XMLObject, Set<String>>. This will be used to extract dynamic trusted names from signed metadata elements.|
|Bean Reference||The ID of a |
One of the following two child elements may be configured. Their use conflicts with the
trustEngineRef XML attributes.
A PEM-format public key.
You can obtain a public key from a certificate using a command such as:
|A trust engine plugin that defines how the signature is to be checked|