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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.security;
import com.yahoo.security.tls.TlsContext;
import javax.net.ssl.KeyManager;
import javax.net.ssl.SSLContext;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509ExtendedKeyManager;
import javax.net.ssl.X509ExtendedTrustManager;
import java.io.IOException;
import java.io.UncheckedIOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.security.GeneralSecurityException;
import java.security.KeyStore;
import java.security.PrivateKey;
import java.security.cert.X509Certificate;
import java.util.List;
import static java.util.Collections.singletonList;
/**
* A builder for {@link SSLContext}.
*
* @author bjorncs
*/
public class SslContextBuilder {
private KeyStoreSupplier trustStoreSupplier = () -> null;
private KeyStoreSupplier keyStoreSupplier = () -> null;
private char[] keyStorePassword;
private TrustManagerFactory trustManagerFactory = TrustManagerUtils::createDefaultX509TrustManager;
private KeyManagerFactory keyManagerFactory = KeyManagerUtils::createDefaultX509KeyManager;
private X509ExtendedKeyManager keyManager;
private X509ExtendedTrustManager trustManager;
public SslContextBuilder() {}
public SslContextBuilder withTrustStore(Path file, KeyStoreType trustStoreType) {
this.trustStoreSupplier = () -> KeyStoreBuilder.withType(trustStoreType).fromFile(file).build();
return this;
}
public SslContextBuilder withTrustStore(KeyStore trustStore) {
this.trustStoreSupplier = () -> trustStore;
return this;
}
public SslContextBuilder withTrustStore(X509Certificate caCertificate) {
return withTrustStore(singletonList(caCertificate));
}
public SslContextBuilder withTrustStore(List<X509Certificate> caCertificates) {
this.trustStoreSupplier = () -> createTrustStore(caCertificates);
return this;
}
public SslContextBuilder withTrustStore(Path pemEncodedCaCertificates) {
this.trustStoreSupplier = () -> {
List<X509Certificate> caCertificates =
X509CertificateUtils.certificateListFromPem(new String(Files.readAllBytes(pemEncodedCaCertificates)));
return createTrustStore(caCertificates);
};
return this;
}
public SslContextBuilder withKeyStore(PrivateKey privateKey, X509Certificate certificate) {
return withKeyStore(privateKey, singletonList(certificate));
}
public SslContextBuilder withKeyStore(PrivateKey privateKey, List<X509Certificate> certificates) {
char[] pwd = new char[0];
this.keyStoreSupplier = () -> KeyStoreBuilder.withType(KeyStoreType.JKS).withKeyEntry("default", privateKey, certificates).build();
this.keyStorePassword = pwd;
return this;
}
public SslContextBuilder withKeyStore(KeyStore keyStore, char[] password) {
this.keyStoreSupplier = () -> keyStore;
this.keyStorePassword = password;
return this;
}
public SslContextBuilder withKeyStore(Path file, char[] password, KeyStoreType keyStoreType) {
this.keyStoreSupplier = () -> KeyStoreBuilder.withType(keyStoreType).fromFile(file, password).build();
this.keyStorePassword = password;
return this;
}
public SslContextBuilder withKeyStore(Path privateKeyPemFile, Path certificatesPemFile) {
this.keyStoreSupplier =
() -> {
PrivateKey privateKey = KeyUtils.fromPemEncodedPrivateKey(new String(Files.readAllBytes(privateKeyPemFile)));
List<X509Certificate> certificates = X509CertificateUtils.certificateListFromPem(new String(Files.readAllBytes(certificatesPemFile)));
return KeyStoreBuilder.withType(KeyStoreType.JKS)
.withKeyEntry("default", privateKey, certificates)
.build();
};
this.keyStorePassword = new char[0];
return this;
}
public SslContextBuilder withTrustManagerFactory(TrustManagerFactory trustManagersFactory) {
this.trustManagerFactory = trustManagersFactory;
return this;
}
public SslContextBuilder withKeyManagerFactory(KeyManagerFactory keyManagerFactory) {
this.keyManagerFactory = keyManagerFactory;
return this;
}
/**
* Note: Callee is responsible for configuring the key manager.
* Any keystore configured by {@link #withKeyStore(KeyStore, char[])} or the other overloads will be ignored.
*/
public SslContextBuilder withKeyManager(X509ExtendedKeyManager keyManager) {
this.keyManager = keyManager;
return this;
}
/**
* Note: Callee is responsible for configuring the trust manager.
* Any truststore configured by {@link #withTrustStore(KeyStore)} or the other overloads will be ignored.
*/
public SslContextBuilder withTrustManager(X509ExtendedTrustManager trustManager) {
this.trustManager = trustManager;
return this;
}
public SSLContext build() {
try {
SSLContext sslContext = SSLContext.getInstance(TlsContext.SSL_CONTEXT_VERSION);
X509ExtendedTrustManager trustManager = this.trustManager != null
? this.trustManager
: trustManagerFactory.createTrustManager(trustStoreSupplier.get());
X509ExtendedKeyManager keyManager = this.keyManager != null
? this.keyManager
: keyManagerFactory.createKeyManager(keyStoreSupplier.get(), keyStorePassword);
sslContext.init(new KeyManager[] {keyManager}, new TrustManager[] {trustManager}, null);
return sslContext;
} catch (GeneralSecurityException e) {
throw new RuntimeException(e);
} catch (IOException e) {
throw new UncheckedIOException(e);
}
finally {
keyStorePassword = null;
}
}
private static KeyStore createTrustStore(List<X509Certificate> caCertificates) {
return KeyStoreBuilder.withType(KeyStoreType.JKS)
.withCertificateEntries("cert", caCertificates)
.build();
}
private interface KeyStoreSupplier {
KeyStore get() throws IOException, GeneralSecurityException;
}
/**
* A factory interface for creating {@link X509ExtendedTrustManager}.
*/
@FunctionalInterface
public interface TrustManagerFactory {
X509ExtendedTrustManager createTrustManager(KeyStore truststore) throws GeneralSecurityException;
}
/**
* A factory interface for creating {@link X509ExtendedKeyManager}.
*/
@FunctionalInterface
public interface KeyManagerFactory {
X509ExtendedKeyManager createKeyManager(KeyStore truststore, char[] password) throws GeneralSecurityException;
}
}
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