Examples with AuthenticationRequest com.webauthn4j.data.AuthenticationRequest used on opensource projects

Example 1 with AuthenticationRequest

use of com.webauthn4j.data.AuthenticationRequest in project keycloak by keycloak.

the class WebAuthnAuthenticator method action.

public void action(AuthenticationFlowContext context) {
    MultivaluedMap<String, String> params = context.getHttpRequest().getDecodedFormParameters();
    context.getEvent().detail(Details.CREDENTIAL_TYPE, getCredentialType());
    // receive error from navigator.credentials.get()
    String errorMsgFromWebAuthnApi = params.getFirst(WebAuthnConstants.ERROR);
    if (errorMsgFromWebAuthnApi != null && !errorMsgFromWebAuthnApi.isEmpty()) {
        setErrorResponse(context, WEBAUTHN_ERROR_API_GET, errorMsgFromWebAuthnApi);
        return;
    }
    String baseUrl = UriUtils.getOrigin(context.getUriInfo().getBaseUri());
    String rpId = getRpID(context);
    Origin origin = new Origin(baseUrl);
    Challenge challenge = new DefaultChallenge(context.getAuthenticationSession().getAuthNote(WebAuthnConstants.AUTH_CHALLENGE_NOTE));
    ServerProperty server = new ServerProperty(origin, rpId, challenge, null);
    byte[] credentialId = Base64Url.decode(params.getFirst(WebAuthnConstants.CREDENTIAL_ID));
    byte[] clientDataJSON = Base64Url.decode(params.getFirst(WebAuthnConstants.CLIENT_DATA_JSON));
    byte[] authenticatorData = Base64Url.decode(params.getFirst(WebAuthnConstants.AUTHENTICATOR_DATA));
    byte[] signature = Base64Url.decode(params.getFirst(WebAuthnConstants.SIGNATURE));
    final String userHandle = params.getFirst(WebAuthnConstants.USER_HANDLE);
    final String userId;
    // existing User Handle means that the authenticator used Resident Key supported public key credential
    if (userHandle == null || userHandle.isEmpty()) {
        // Resident Key not supported public key credential was used
        // so rely on the user that has already been authenticated
        userId = context.getUser().getId();
    } else {
        // decode using the same charset as it has been encoded (see: WebAuthnRegister.java)
        userId = new String(Base64Url.decode(userHandle), StandardCharsets.UTF_8);
        if (context.getUser() != null) {
            // Resident Key supported public key credential was used,
            // so need to confirm whether the already authenticated user is equals to one authenticated by the webauthn authenticator
            String firstAuthenticatedUserId = context.getUser().getId();
            if (firstAuthenticatedUserId != null && !firstAuthenticatedUserId.equals(userId)) {
                context.getEvent().detail(WebAuthnConstants.FIRST_AUTHENTICATED_USER_ID, firstAuthenticatedUserId).detail(WebAuthnConstants.AUTHENTICATED_USER_ID, userId);
                setErrorResponse(context, WEBAUTHN_ERROR_DIFFERENT_USER, null);
                return;
            }
        } else {
        // Resident Key supported public key credential was used,
        // and the user has not yet been identified
        // so rely on the user authenticated by the webauthn authenticator
        // NOP
        }
    }
    boolean isUVFlagChecked = false;
    String userVerificationRequirement = getWebAuthnPolicy(context).getUserVerificationRequirement();
    if (WebAuthnConstants.OPTION_REQUIRED.equals(userVerificationRequirement))
        isUVFlagChecked = true;
    UserModel user = session.users().getUserById(context.getRealm(), userId);
    AuthenticationRequest authenticationRequest = new AuthenticationRequest(credentialId, authenticatorData, clientDataJSON, signature);
    AuthenticationParameters authenticationParameters = new AuthenticationParameters(server, // here authenticator cannot be fetched, set it afterwards in WebAuthnCredentialProvider.isValid()
    null, isUVFlagChecked);
    WebAuthnCredentialModelInput cred = new WebAuthnCredentialModelInput(getCredentialType());
    cred.setAuthenticationRequest(authenticationRequest);
    cred.setAuthenticationParameters(authenticationParameters);
    boolean result = false;
    try {
        result = session.userCredentialManager().isValid(context.getRealm(), user, cred);
    } catch (WebAuthnException wae) {
        setErrorResponse(context, WEBAUTHN_ERROR_AUTH_VERIFICATION, wae.getMessage());
        return;
    }
    String encodedCredentialID = Base64Url.encode(credentialId);
    if (result) {
        String isUVChecked = Boolean.toString(isUVFlagChecked);
        logger.debugv("WebAuthn Authentication successed. isUserVerificationChecked = {0}, PublicKeyCredentialID = {1}", isUVChecked, encodedCredentialID);
        context.setUser(user);
        context.getEvent().detail(WebAuthnConstants.USER_VERIFICATION_CHECKED, isUVChecked).detail(WebAuthnConstants.PUBKEY_CRED_ID_ATTR, encodedCredentialID);
        context.success();
    } else {
        context.getEvent().detail(WebAuthnConstants.AUTHENTICATED_USER_ID, userId).detail(WebAuthnConstants.PUBKEY_CRED_ID_ATTR, encodedCredentialID);
        setErrorResponse(context, WEBAUTHN_ERROR_USER_NOT_FOUND, null);
        context.cancelLogin();
    }
}