Class ChainingSignatureTrustEngine

All Implemented Interfaces:
TrustEngine<Signature>, SignatureTrustEngine

public class ChainingSignatureTrustEngine extends Object implements SignatureTrustEngine
Evaluate a signature in sequence using a chain of subordinate trust engines. If the signature may be established as trusted by any of the subordinate engines, the token is considered trusted. Otherwise it is considered untrusted.
  • Field Details

    • log

      @Nonnull private final org.slf4j.Logger log
      Class logger.
    • engines

      @Nonnull private List<SignatureTrustEngine> engines
      The chain of subordinate trust engines.
  • Constructor Details

    • ChainingSignatureTrustEngine

      public ChainingSignatureTrustEngine(@Nonnull @ParameterName(name="chain") List<SignatureTrustEngine> chain)
      chain - the list of trust engines in the chain
  • Method Details

    • getChain

      @Nonnull @Unmodifiable @NotLive public List<SignatureTrustEngine> getChain()
      Get the list of configured trust engines which constitute the trust evaluation chain.
      the modifiable list of trust engines in the chain
    • getKeyInfoResolver

      @Nullable public KeyInfoCredentialResolver getKeyInfoResolver()
      Get the KeyInfoCredentialResolver instance used to resolve (advisory) signing credential information from KeyInfo elements contained within a Signature element. Note that credential(s) obtained via this resolver are not themselves trusted. They must be evaluated against the trusted credential information obtained from the trusted credential resolver.
      Specified by:
      getKeyInfoResolver in interface SignatureTrustEngine
      a KeyInfoCredentialResolver instance
    • validate

      public boolean validate(@Nonnull Signature token, @Nullable CriteriaSet trustBasisCriteria) throws SecurityException
      Validates the token against trusted information obtained in an implementation-specific manner.
      Specified by:
      validate in interface TrustEngine<Signature>
      token - security token to validate
      trustBasisCriteria - criteria used to describe and/or resolve the information which serves as the basis for trust evaluation
      true iff the token is trusted and valid
      SecurityException - thrown if there is a problem validating the security token
    • validate

      public boolean validate(@Nonnull byte[] signature, @Nonnull byte[] content, @Nonnull String algorithmURI, @Nullable CriteriaSet trustBasisCriteria, @Nullable Credential candidateCredential) throws SecurityException
      Determines whether a raw signature over specified content is valid and signed by a trusted credential.

      A candidate verification credential may optionally be supplied. If one is supplied and is determined to successfully verify the signature, an attempt will be made to establish trust on this basis.

      If a candidate credential is not supplied, or it does not successfully verify the signature, some implementations may be able to resolve candidate verification credential(s) in an implementation-specific manner based on the trusted criteria supplied, and then attempt to verify the signature and establish trust on this basis.

      Specified by:
      validate in interface SignatureTrustEngine
      signature - the signature value
      content - the content that was signed
      algorithmURI - the signature algorithm URI which was used to sign the content
      trustBasisCriteria - criteria used to describe and/or resolve the information which serves as the basis for trust evaluation
      candidateCredential - the untrusted candidate credential containing the validation key for the signature (optional)
      true if the signature was valid for the provided content and was signed by a key contained within a credential established as trusted based on the supplied criteria, otherwise false
      SecurityException - thrown if there is a problem attempting to verify the signature such as the signature algorithm not being supported