JarCastingWebAuthn4J
A portable Java library for WebAuthn and Apple App Attest server side verification
Conformance
All mandatory test cases and optional Android Key attestation test cases of FIDO2 Test Tools provided by FIDO Alliance are passed.
Supported Attestation statement format
All attestation statement formats are supported.
- Packed attestation
- FIDO U2F attestation
- Android Key attestation
- Android SafetyNet attestation
- TPM attestation
- Apple Anonymous attestation
- None attestation
- Apple App Attest attestation
Projects using WebAuthn4J
Documentation
You can find out more details from the reference.
Getting from Maven Central
If you are using Maven, just add the webauthn4j as a dependency:
<properties>
...
<!-- Use the latest version whenever possible. -->
<webauthn4j.version>0.14.0.RELEASE</webauthn4j.version>
...
</properties>
<dependencies>
...
<dependency>
<groupId>com.webauthn4j</groupId>
<artifactId>webauthn4j-core</artifactId>
<version>${webauthn4j.version}</version>
</dependency>
...
</dependencies>
Build from source
WebAuthn4J uses a Gradle based build system. In the instructions below, gradlew is invoked from the root of the source tree and serves as a cross-platform, self-contained bootstrap mechanism for the build.
Prerequisites
- Java8 or later
Checkout sources
git clone https://github.com/webauthn4j/webauthn4j
Build all jars
./gradlew build
How to use
Parse and Validation on WebAuthn registration
If your would like to validate Apple App Attest, please see the reference.
// Client properties
byte[] attestationObject = null /* set attestationObject */;
byte[] clientDataJSON = null /* set clientDataJSON */;
String clientExtensionJSON = null; /* set clientExtensionJSON */;
Set<String> transports = null /* set transports */;
// Server properties
Origin origin = null /* set origin */;
String rpId = null /* set rpId */;
Challenge challenge = null /* set challenge */;
byte[] tokenBindingId = null /* set tokenBindingId */;
ServerProperty serverProperty = new ServerProperty(origin, rpId, challenge, tokenBindingId);
// expectations
boolean userVerificationRequired = false;
boolean userPresenceRequired = true;
List<String> expectedExtensionIds = Collections.emptyList();
RegistrationRequest registrationRequest = new RegistrationRequest(attestationObject, clientDataJSON, clientExtensionJSON, transports);
RegistrationParameters registrationParameters = new RegistrationParameters(serverProperty, userVerificationRequired, userPresenceRequired, expectedExtensionIds);
RegistrationData registrationData;
try{
registrationData = webAuthnManager.parse(registrationRequest);
}
catch (DataConversionException e){
// If you would like to handle WebAuthn data structure parse error, please catch DataConversionException
throw e;
}
try{
webAuthnManager.validate(registrationData, registrationParameters);
}
catch (ValidationException e){
// If you would like to handle WebAuthn data validation error, please catch ValidationException
throw e;
}
// please persist Authenticator object, which will be used in the authentication process.
Authenticator authenticator =
new AuthenticatorImpl( // You may create your own Authenticator implementation to save friendly authenticator name
registrationData.getAttestationObject().getAuthenticatorData().getAttestedCredentialData(),
registrationData.getAttestationObject().getAttestationStatement(),
registrationData.getAttestationObject().getAuthenticatorData().getSignCount()
);
save(authenticator); // please persist authenticator in your manner
Parse and Validation on authentication
// Client properties
byte[] credentialId = null /* set credentialId */;
byte[] userHandle = null /* set userHandle */;
byte[] authenticatorData = null /* set authenticatorData */;
byte[] clientDataJSON = null /* set clientDataJSON */;
String clientExtensionJSON = null /* set clientExtensionJSON */;
byte[] signature = null /* set signature */;
// Server properties
Origin origin = null /* set origin */;
String rpId = null /* set rpId */;
Challenge challenge = null /* set challenge */;
byte[] tokenBindingId = null /* set tokenBindingId */;
ServerProperty serverProperty = new ServerProperty(origin, rpId, challenge, tokenBindingId);
// expectations
boolean userVerificationRequired = true;
boolean userPresenceRequired = true;
List<String> expectedExtensionIds = Collections.emptyList();
Authenticator authenticator = load(credentialId); // please load authenticator object persisted in the registration process in your manner
AuthenticationRequest authenticationRequest =
new AuthenticationRequest(
credentialId,
userHandle,
authenticatorData,
clientDataJSON,
clientExtensionJSON,
signature
);
AuthenticationParameters authenticationParameters =
new AuthenticationParameters(
serverProperty,
authenticator,
userVerificationRequired,
userPresenceRequired,
expectedExtensionIds
);
AuthenticationData authenticationData;
try{
authenticationData = webAuthnManager.parse(authenticationRequest);
}
catch (DataConversionException e){
// If you would like to handle WebAuthn data structure parse error, please catch DataConversionException
throw e;
}
try{
webAuthnManager.validate(authenticationData, authenticationParameters);
}
catch (ValidationException e){
// If you would like to handle WebAuthn data validation error, please catch ValidationException
throw e;
}
// please update the counter of the authenticator record
updateCounter(
authenticationData.getCredentialId(),
authenticationData.getAuthenticatorData().getSignCount()
);
Sample application
WebAuthn4J Spring Security is built on the top of WebAuthn4J, and its sample application demonstrates WebAuthn4J feature well. Please see WebAuthn4J Spring Security sample application.
License
WebAuthn4J is Open Source software released under the Apache 2.0 license.
Contributing
Interested in helping out with WebAuthn4J? Great! Your participation in the community is much appreciated! Please feel free to open issues and send pull-requests.
