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package fish.payara.microprofile.config.extensions.gcp;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyVetoException;
import java.io.File;
import java.io.FileInputStream;
import java.security.KeyFactory;
import java.security.NoSuchAlgorithmException;
import java.security.PrivateKey;
import java.security.spec.InvalidKeySpecException;
import java.security.spec.PKCS8EncodedKeySpec;
import java.time.Duration;
import java.time.Instant;
import java.time.temporal.ChronoUnit;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.logging.Level;
import java.util.logging.Logger;
import jakarta.inject.Inject;
import jakarta.json.Json;
import jakarta.json.JsonObject;
import jakarta.json.stream.JsonParser;
import jakarta.json.stream.JsonParser.Event;
import jakarta.ws.rs.client.Client;
import jakarta.ws.rs.client.ClientBuilder;
import jakarta.ws.rs.client.Entity;
import jakarta.ws.rs.client.WebTarget;
import jakarta.ws.rs.core.MediaType;
import jakarta.ws.rs.core.Response;
import com.nimbusds.jose.JOSEException;
import com.nimbusds.jose.JOSEObjectType;
import com.nimbusds.jose.JWSAlgorithm;
import com.nimbusds.jose.JWSHeader;
import com.nimbusds.jose.crypto.RSASSASigner;
import com.nimbusds.jose.util.Base64;
import com.nimbusds.jwt.JWTClaimsSet;
import com.nimbusds.jwt.SignedJWT;
import fish.payara.microprofile.config.extensions.oauth.OAuth2Client;
import fish.payara.microprofile.config.extensions.gcp.model.Secret;
import fish.payara.microprofile.config.extensions.gcp.model.SecretHolder;
import fish.payara.microprofile.config.extensions.gcp.model.SecretsResponse;
import fish.payara.nucleus.microprofile.config.source.extension.ConfiguredExtensionConfigSource;
import fish.payara.nucleus.microprofile.config.spi.MicroprofileConfigConfiguration;
import org.glassfish.api.admin.ServerEnvironment;
import org.jvnet.hk2.annotations.Service;
@Service(name = "gcp-secrets-config-source")
public class GCPSecretsConfigSource extends ConfiguredExtensionConfigSource {
private static final Logger LOGGER = Logger.getLogger(GCPSecretsConfigSource.class.getName());
private static final String AUTH_URL = "https://www.googleapis.com/oauth2/v4/token";
private static final String LIST_SECRETS_ENDPOINT = "https://secretmanager.googleapis.com/v1/projects/%s/secrets";
private static final String SECRET_ENDPOINT = LIST_SECRETS_ENDPOINT + "/%s";
private static final String GET_SECRETS_VERSION_ENDPOINT = SECRET_ENDPOINT + "/versions/latest:access";
private static final String CREATE_SECRET_VERSION_ENDPOINT = SECRET_ENDPOINT + ":addVersion";
private Client client = ClientBuilder.newClient();
private OAuth2Client authClient;
@Inject
private ServerEnvironment env;
@Inject
MicroprofileConfigConfiguration mpconfig;
@Override
public void bootstrap() {
String clientEmail = null;
String privateKey = null;
try {
final File tokenFile = getTokenFile();
if (tokenFile == null) {
LOGGER.warning("Couldn't find token file, make sure it's configured.");
} else {
try (JsonParser parser = Json.createParser(new FileInputStream(getTokenFile()))) {
while (parser.hasNext()) {
JsonParser.Event parseEvent = parser.next();
if (parseEvent == Event.KEY_NAME) {
final String keyName = parser.getString();
parser.next();
switch (keyName) {
case "client_email":
clientEmail = parser.getString();
break;
case "private_key":
privateKey = parser.getString();
break;
}
if (clientEmail != null && privateKey != null) {
break;
}
}
}
if (clientEmail == null || privateKey == null) {
throw new PropertyVetoException("Error reading JSON key file", new PropertyChangeEvent(configuration, "jsonKeyFile", null, null));
}
}
}
} catch (Exception ex) {
LOGGER.log(Level.WARNING, "Couldn't find or read the GCP key file, make sure it exists.", ex);
}
Map data = new HashMap<>();
data.put("grant_type", "urn:ietf:params:oauth:grant-type:jwt-bearer");
if (clientEmail != null && privateKey != null) {
try {
final SignedJWT jwt = buildJwt(
// issuer
clientEmail,
// scope
"https://www.googleapis.com/auth/cloud-platform");
jwt.sign(new RSASSASigner(parsePrivateKey(privateKey)));
data.put("assertion", jwt.serialize());
} catch (NoSuchAlgorithmException | InvalidKeySpecException | JOSEException e) {
LOGGER.log(Level.WARNING, "An error occurred while signing the GCP auth token", e);
}
}
this.authClient = new OAuth2Client(AUTH_URL, data);
}
private String authenticate() {
final Response response = authClient.authenticate();
final int status = response.getStatus();
if (status == 200) {
JsonObject data = response.readEntity(JsonObject.class);
Integer expirySeconds = data.getInt("expires_in");
authClient.expire(Duration.ofSeconds(expirySeconds));
return data.getString("access_token");
} else if (status == 400) {
LOGGER.log(Level.WARNING, "Couldn't authenticate with GCP. Check your configuration options are correct.");
}
return null;
}
@Override
public Map getProperties() {
Map results = new HashMap<>();
final String accessToken = authenticate();
if (accessToken == null) {
return results;
}
final WebTarget secretsTarget = client
.target(String.format(LIST_SECRETS_ENDPOINT, configuration.getProjectName()));
final Response secretsResponse = secretsTarget.request()
.accept(MediaType.APPLICATION_JSON)
.header("Authorization", "Bearer " + accessToken).get();
if (secretsResponse.getStatus() != 200) {
return results;
}
final List secrets = secretsResponse
.readEntity(SecretsResponse.class)
.getSecrets();
for (Secret secret : secrets) {
final String secretName = secret.getName();
results.put(secretName, getValue(secretName));
}
return results;
}
@Override
public Set getPropertyNames() {
return getProperties().keySet();
}
@Override
public String getValue(String propertyName) {
final String accessToken = authenticate();
if (accessToken == null) {
return null;
}
final WebTarget secretTarget = client
.target(String.format(GET_SECRETS_VERSION_ENDPOINT, configuration.getProjectName(), propertyName));
final Response secretResponse = secretTarget
.request()
.accept(MediaType.APPLICATION_JSON)
.header("Authorization", "Bearer " + accessToken)
.get();
final int status = secretResponse.getStatus();
if (status != 200) {
if (status != 400) {
LOGGER.log(Level.WARNING, "Failed to get GCP secret. {0}", secretResponse.readEntity(String.class));
}
return null;
}
final String value = secretResponse
.readEntity(SecretHolder.class)
.getPayload()
.getData();
return value;
}
@Override
public boolean setValue(String name, String value) {
final String accessToken = authenticate();
if (accessToken == null) {
return false;
}
final WebTarget secretTarget = client
.target(String.format(LIST_SECRETS_ENDPOINT, configuration.getProjectName()));
final Response secretResponse = secretTarget
.queryParam("secretId", name)
.request()
.accept(MediaType.APPLICATION_JSON)
.header("Content-Type", MediaType.APPLICATION_JSON)
.header("Authorization", "Bearer " + accessToken)
.post(Entity.entity(new Secret(), MediaType.APPLICATION_JSON));
final int status = secretResponse.getStatus();
if (status != 200 && status != 409) {
LOGGER.log(Level.WARNING, "Failed to set GCP secret. {0}", secretResponse.readEntity(String.class));
return false;
}
final WebTarget addSecretTarget = client
.target(String.format(CREATE_SECRET_VERSION_ENDPOINT, configuration.getProjectName(), name));
final Response addSecretResponse = addSecretTarget
.request()
.accept(MediaType.APPLICATION_JSON)
.header("Content-Type", MediaType.APPLICATION_JSON)
.header("Authorization", "Bearer " + accessToken)
.post(Entity.entity(new SecretHolder(value), MediaType.APPLICATION_JSON));
if (addSecretResponse.getStatus() == 200) {
return true;
}
LOGGER.log(Level.WARNING, "Failed to set GCP secret. {0}", addSecretResponse.readEntity(String.class));
return false;
}
@Override
public boolean deleteValue(String name) {
final String accessToken = authenticate();
if (accessToken == null) {
return false;
}
final WebTarget secretTarget = client
.target(String.format(SECRET_ENDPOINT, configuration.getProjectName(), name));
final Response secretResponse = secretTarget
.request()
.accept(MediaType.APPLICATION_JSON)
.header("Authorization", "Bearer " + accessToken)
.delete();
if (secretResponse.getStatus() == 200) {
return true;
}
LOGGER.log(Level.WARNING, "Failed to delete GCP secret. {0}", secretResponse.readEntity(String.class));
return false;
}
@Override
public String getSource() {
return "cloud";
}
@Override
public String getName() {
return "gcp";
}
@Override
public int getOrdinal() {
return Integer.parseInt(mpconfig.getCloudOrdinality());
}
// Helpers
private static SignedJWT buildJwt(final String issuer, final String scope) {
Instant now = Instant.now();
Instant expiry = now.plus(1, ChronoUnit.MINUTES);
JWTClaimsSet claims = new JWTClaimsSet.Builder()
.issuer(issuer)
.audience(AUTH_URL)
.issueTime(Date.from(now))
.expirationTime(Date.from(expiry))
.claim("scope", scope)
.build();
JWSHeader header = new JWSHeader.Builder(JWSAlgorithm.RS256)
.type(JOSEObjectType.JWT)
.build();
return new SignedJWT(header, claims);
}
private static PrivateKey parsePrivateKey(String privateKey) throws NoSuchAlgorithmException, InvalidKeySpecException {
String privateKeyContent = privateKey
.replaceAll("\\n", "")
.replace("-----BEGIN PRIVATE KEY-----", "")
.replace("-----END PRIVATE KEY-----", "");
KeyFactory kf = KeyFactory.getInstance("RSA");
PKCS8EncodedKeySpec keySpecPKCS8 = new PKCS8EncodedKeySpec(new Base64(privateKeyContent).decode());
return kf.generatePrivate(keySpecPKCS8);
}
private File getTokenFile() {
final String fileName = configuration.getTokenFilePath();
if (fileName != null) {
return env.getConfigDirPath().toPath().resolve(configuration.getTokenFilePath()).toFile();
}
return null;
}
}
