Path testArtifact = Paths.get("path/to/my/file.jar")

// sign using the sigstore public instance
var signer = KeylessSigner.builder().sigstorePublicDefaults().build();
Bundle result = signer.signFile(testArtifact);

// sigstore bundle format (serialized as <artifact>.sigstore.json)
String bundleJson = result.toJson();

Path artifact = Paths.get("path/to/my-artifact");

// import a json formatted sigstore bundle
Path bundleFile = Paths.get("path/to/my-artifact.sigstore.json");
Bundle bundle = Bundle.from(bundleFile, StandardCharsets.UTF_8);

// add certificate policy to verify the identity of the signer
VerificationOptions options = VerificationOptions.builder().addCertificateMatchers(
  CertificateMatcher.fulcio()
    .subjectAlternativeName(StringMatcher.string("[email protected]"))
    .issuer(StringMatcher.string("https://accounts.example.com"))
    .build());

try {
  // verify using the sigstore public instance
  var verifier = new KeylessVerifier.builder().sigstorePublicDefaults().build();
  verifier.verify(artifact, bundle, verificationOptions);
  // verification passed!
} catch (KeylessVerificationException e) {
  // verification failed
}