Examples with SignerInformation org.openecard.bouncycastle.cms.SignerInformation used on opensource projects

Example 1 with SignerInformation

use of org.openecard.bouncycastle.cms.SignerInformation in project open-ecard by ecsec.

the class SignatureVerifier method validate.

public void validate(@Nonnull byte[] signature) throws KeyStoreException, SignatureInvalid {
    try {
        // load BC provider, so that the algorithms are available for the signature verification
        Security.addProvider(new BouncyCastleProvider());
        CMSProcessable wrappedChallenge = new CMSProcessableByteArray(challenge);
        CMSSignedData signedData = new CMSSignedData(wrappedChallenge, signature);
        Store<X509CertificateHolder> certStore = signedData.getCertificates();
        SignerInformationStore signerInfoStore = signedData.getSignerInfos();
        Collection<SignerInformation> signers = signerInfoStore.getSigners();
        Collection<X509Certificate> allCerts = convertCertificates(certStore.getMatches(new AllSelector()));
        for (SignerInformation signer : signers) {
            Collection<X509CertificateHolder> certCollection = certStore.getMatches(signer.getSID());
            X509CertificateHolder cert = certCollection.iterator().next();
            DigestCalculatorProvider dp = new JcaDigestCalculatorProviderBuilder().setProvider("BC").build();
            JcaSignerInfoVerifierBuilder verifBuilder = new JcaSignerInfoVerifierBuilder(dp).setProvider("BC");
            verifBuilder.setSignatureAlgorithmFinder(new DefaultSignatureAlgorithmIdentifierFinder() {

                @Override
                public AlgorithmIdentifier find(String sigAlgName) {
                    if (!AllowedSignatureAlgorithms.isKnownJcaAlgorithm(sigAlgName)) {
                        throw new IllegalArgumentException("Unsupported signature algorithm used.");
                    } else {
                        return super.find(sigAlgName);
                    }
                }
            });
            SignerInformationVerifier verif = verifBuilder.build(cert);
            // verify the signature
            if (!signer.verify(verif)) {
                throw new SignatureInvalid("Signer information could not be verified.");
            }
            // verify the path and certificate
            X509Certificate x509Cert = convertCertificate(cert);
            // TODO: verify that the signature is not too old. How old can it be at max? 1 minute?
            validatePath(x509Cert, allCerts, null);
            // check that the end certificate is under the admissable certificates
            if (ChipGatewayProperties.isUseSubjectWhitelist()) {
                X500Principal subj = x509Cert.getSubjectX500Principal();
                if (!AllowedSubjects.instance().isInSubjects(subj)) {
                    String msg = "The certificate used in the signature has an invalid subject: " + subj.getName();
                    throw new InvalidSubjectException(msg);
                }
            }
        }
        // fail if there is no signature in the SignedData structure
        if (signers.isEmpty()) {
            throw new SignatureInvalid("No signatures present in the given SignedData element.");
        }
    } catch (CertificateException ex) {
        throw new SignatureInvalid("Failed to read a certificate form the CMS data structure.", ex);
    } catch (CertPathBuilderException ex) {
        throw new SignatureInvalid("Failed to build certificate path for PKIX validation.", ex);
    } catch (CMSVerifierCertificateNotValidException ex) {
        throw new SignatureInvalid("Signer certificate was not valid when the signature was created.", ex);
    } catch (CMSException ex) {
        throw new SignatureInvalid("Failed to validate CMS data structure.", ex);
    } catch (InvalidSubjectException ex) {
        throw new SignatureInvalid("Certificate with invalid subject used in signature.", ex);
    } catch (NoSuchAlgorithmException | InvalidAlgorithmParameterException | OperatorCreationException ex) {
        throw new SignatureInvalid("Invalid or unsupported algorithm or algorithm parameter used in signature.", ex);
    } catch (IllegalArgumentException ex) {
        throw new SignatureInvalid("Signature containes an invalid value.", ex);
    }
}