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// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.container.jdisc.athenz.impl;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.google.inject.Inject;
import com.yahoo.component.AbstractComponent;
import com.yahoo.container.core.identity.IdentityConfig;
import com.yahoo.container.jdisc.athenz.AthenzIdentityProvider;
import org.bouncycastle.asn1.pkcs.PKCSObjectIdentifiers;
import org.bouncycastle.asn1.x509.Extension;
import org.bouncycastle.asn1.x509.ExtensionsGenerator;
import org.bouncycastle.asn1.x509.GeneralName;
import org.bouncycastle.asn1.x509.GeneralNames;
import org.bouncycastle.openssl.jcajce.JcaPEMWriter;
import org.bouncycastle.operator.OperatorCreationException;
import org.bouncycastle.operator.jcajce.JcaContentSignerBuilder;
import org.bouncycastle.pkcs.PKCS10CertificationRequest;
import org.bouncycastle.pkcs.PKCS10CertificationRequestBuilder;
import org.bouncycastle.pkcs.jcajce.JcaPKCS10CertificationRequestBuilder;
import org.bouncycastle.util.io.pem.PemObject;
import javax.security.auth.x500.X500Principal;
import java.io.IOException;
import java.io.StringWriter;
import java.security.KeyPair;
import java.security.KeyPairGenerator;
import java.security.NoSuchAlgorithmException;
/**
* @author mortent
*/
public final class AthenzIdentityProviderImpl extends AbstractComponent implements AthenzIdentityProvider {
private InstanceIdentity instanceIdentity;
private final String dnsSuffix;
private final String providerUniqueId;
private final String domain;
private final String service;
@Inject
public AthenzIdentityProviderImpl(IdentityConfig config) throws IOException {
this(config, new ServiceProviderApi(config.loadBalancerAddress()), new AthenzService());
}
// Test only
public AthenzIdentityProviderImpl(IdentityConfig config, ServiceProviderApi serviceProviderApi, AthenzService athenzService) throws IOException {
KeyPair keyPair = createKeyPair();
this.domain = config.domain();
this.service = config.service();
String signedIdentityDocument = serviceProviderApi.getSignedIdentityDocument();
String athenzUrl = getZtsEndpoint(signedIdentityDocument);
this.dnsSuffix = getDnsSuffix(signedIdentityDocument);
this.providerUniqueId = getProviderUniqueId(signedIdentityDocument);
String providerServiceName = getProviderServiceName(signedIdentityDocument);
InstanceRegisterInformation instanceRegisterInformation = new InstanceRegisterInformation(
providerServiceName,
this.domain,
this.service,
signedIdentityDocument,
createCSR(keyPair),
true
);
instanceIdentity = athenzService.sendInstanceRegisterRequest(instanceRegisterInformation, athenzUrl);
}
private static String getProviderUniqueId(String signedIdentityDocument) throws IOException {
return getJsonNode(signedIdentityDocument, "provider-unique-id");
}
private static String getDnsSuffix(String signedIdentityDocument) throws IOException {
return getJsonNode(signedIdentityDocument, "dns-suffix");
}
private static String getProviderServiceName(String signedIdentityDocument) throws IOException {
return getJsonNode(signedIdentityDocument, "provider-service");
}
private static String getZtsEndpoint(String signedIdentityDocument) throws IOException {
return getJsonNode(signedIdentityDocument, "zts-endpoint");
}
private static String getJsonNode(String jsonString, String path) throws IOException {
ObjectMapper mapper = new ObjectMapper();
JsonNode jsonNode = mapper.readTree(jsonString);
return jsonNode.get(path).asText();
}
private static KeyPair createKeyPair() {
try {
KeyPairGenerator kpg = KeyPairGenerator.getInstance("RSA");
return kpg.generateKeyPair();
} catch (NoSuchAlgorithmException e) {
throw new RuntimeException(e);
}
}
private String createCSR(KeyPair keyPair) throws IOException {
try {
// Add SAN dnsname <service>.<domain-with-dashes>.<provider-dnsname-suffix>
// and SAN dnsname <provider-unique-instance-id>.instanceid.athenz.<provider-dnsname-suffix>
GeneralNames subjectAltNames = new GeneralNames(new GeneralName[]{
new GeneralName(GeneralName.dNSName, String.format("%s.%s.%s",
service(),
domain().replace(".", "-"),
dnsSuffix)),
new GeneralName(GeneralName.dNSName, String.format("%s.instanceid.athenz.%s",
providerUniqueId,
dnsSuffix))
});
ExtensionsGenerator extGen = new ExtensionsGenerator();
extGen.addExtension(Extension.subjectAlternativeName, false, subjectAltNames);
X500Principal subject = new X500Principal(
String.format("CN=%s.%s", domain(), service()));
PKCS10CertificationRequestBuilder requestBuilder =
new JcaPKCS10CertificationRequestBuilder(subject, keyPair.getPublic());
requestBuilder.addAttribute(PKCSObjectIdentifiers.pkcs_9_at_extensionRequest, extGen.generate());
PKCS10CertificationRequest csr = requestBuilder.build(
new JcaContentSignerBuilder("SHA256withRSA").build(keyPair.getPrivate()));
PemObject pemObject = new PemObject("CERTIFICATE REQUEST", csr.getEncoded());
try (StringWriter stringWriter = new StringWriter()) {
try (JcaPEMWriter pemWriter = new JcaPEMWriter(stringWriter)) {
pemWriter.writeObject(pemObject);
return stringWriter.toString();
}
}
} catch (OperatorCreationException e) {
throw new RuntimeException(e);
}
}
@Override
public String getNToken() {
return instanceIdentity.getServiceToken();
}
@Override
public String getX509Cert() {
return instanceIdentity.getX509Certificate();
}
@Override
public String domain() {
return domain;
}
@Override
public String service() {
return service;
}
}
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