io.gravitee.common.util.KeyStoreUtils Maven / Gradle / Ivy
/**
* Copyright (C) 2015 The Gravitee team (http://gravitee.io)
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package io.gravitee.common.util;
import static java.util.Arrays.asList;
import java.io.*;
import java.math.BigInteger;
import java.security.*;
import java.security.cert.Certificate;
import java.security.cert.X509Certificate;
import java.util.*;
import org.bouncycastle.asn1.pkcs.PrivateKeyInfo;
import org.bouncycastle.asn1.x500.RDN;
import org.bouncycastle.asn1.x500.X500Name;
import org.bouncycastle.asn1.x500.style.BCStyle;
import org.bouncycastle.asn1.x500.style.IETFUtils;
import org.bouncycastle.cert.X509CertificateHolder;
import org.bouncycastle.cert.X509v3CertificateBuilder;
import org.bouncycastle.cert.jcajce.JcaX509CertificateConverter;
import org.bouncycastle.cert.jcajce.JcaX509CertificateHolder;
import org.bouncycastle.cert.jcajce.JcaX509v3CertificateBuilder;
import org.bouncycastle.jce.provider.BouncyCastleProvider;
import org.bouncycastle.openssl.PEMKeyPair;
import org.bouncycastle.openssl.PEMParser;
import org.bouncycastle.openssl.jcajce.JcaPEMKeyConverter;
import org.bouncycastle.operator.ContentSigner;
import org.bouncycastle.operator.jcajce.JcaContentSignerBuilder;
import org.bouncycastle.util.io.pem.PemReader;
/**
* @author Jeoffrey HAEYAERT (jeoffrey.haeyaert at graviteesource.com)
* @author GraviteeSource Team
*/
public class KeyStoreUtils {
public static final String TYPE_JKS = "JKS";
public static final String TYPE_PEM = "PEM";
public static final String TYPE_PKCS12 = "PKCS12";
public static final String DEFAULT_ALIAS = "dummy-entry";
public static final String DEFAULT_KEYSTORE_TYPE = TYPE_PKCS12;
private static final int DNSNAME = 2;
private static final Date DEFAULT_NOT_BEFORE = new Date(System.currentTimeMillis() - 31536000000L);
private static final Date DEFAULT_NOT_AFTER = new Date(253402300799000L);
private static final int DEFAULT_KEY_LENGTH_BITS = 2048;
private static final String DEFAULT_SIGNATURE_ALGORITHM = "SHA256WithRSAEncryption";
private static final String DEFAULT_ALGORITHM = "RSA";
/**
* Initializes and returns a {@link KeyStore} from a file path.
*
* @param format the format of the specified keystore. Could be PKCS12 or JKS.
* @param path the path to the keystore file to initialize.
* @param password the password required to read the keystore. null if not password.
*
* @return the initialized keystore or an {@link IllegalArgumentException} if the keystore can't be read or initialized.
*/
public static KeyStore initFromPath(String format, String path, String password) {
try (InputStream is = new File(path).toURI().toURL().openStream()) {
final KeyStore keyStore = KeyStore.getInstance(format);
keyStore.load(is, null == password ? null : password.toCharArray());
return keyStore;
} catch (Exception e) {
throw new IllegalArgumentException(String.format("Unable to load keystore from path [%s]", path), e);
}
}
/**
* Initializes and returns a {@link KeyStore} from a base64 encoded content string.
*
* @param format the format of the specified keystore. Could be PKCS12 or JKS.
* @param keystore the base64 encoded content representing the keystore to initialize.
* @param password the password required to read the keystore. null if not password.
*
* @return the initialized keystore or an {@link IllegalArgumentException} if the keystore can't be read or initialized.
*/
public static KeyStore initFromContent(String format, String keystore, String password) {
try {
final ByteArrayInputStream stream = new ByteArrayInputStream(Base64.getDecoder().decode(keystore));
KeyStore keyStore = KeyStore.getInstance(format);
keyStore.load(stream, password.toCharArray());
return keyStore;
} catch (Exception e) {
throw new IllegalArgumentException("Unable to get keystore from base64", e);
}
}
/**
* Initializes and returns a {@link KeyStore} containing a self-signed certificate.
*
* @param fqdn the fully qualified domain name to use as common name (CN) for the self signed certificate.
* @param password the password to use to protect the keystore.
*
* @return the initialized keystore or an {@link IllegalArgumentException} if the keystore initialized.
*/
public static KeyStore initSelfSigned(String fqdn, String password) {
try {
KeyStore keyStore = KeyStore.getInstance(DEFAULT_KEYSTORE_TYPE);
keyStore.load(null, new char[0]);
final KeyPairGenerator keyGen = KeyPairGenerator.getInstance(DEFAULT_ALGORITHM);
final SecureRandom random = new SecureRandom();
keyGen.initialize(DEFAULT_KEY_LENGTH_BITS, random);
final KeyPair keypair = keyGen.generateKeyPair();
PrivateKey privateKey = keypair.getPrivate();
X500Name cn = new X500Name("CN=" + fqdn);
X509v3CertificateBuilder builder = new JcaX509v3CertificateBuilder(
cn,
new BigInteger(64, random),
DEFAULT_NOT_BEFORE,
DEFAULT_NOT_AFTER,
cn,
keypair.getPublic()
);
ContentSigner signer = new JcaContentSignerBuilder(DEFAULT_SIGNATURE_ALGORITHM).build(privateKey);
X509CertificateHolder certHolder = builder.build(signer);
final JcaX509CertificateConverter converter = new JcaX509CertificateConverter().setProvider(new BouncyCastleProvider());
X509Certificate certificate = converter.getCertificate(certHolder);
certificate.verify(keypair.getPublic());
keyStore.setEntry(
DEFAULT_ALIAS,
new KeyStore.PrivateKeyEntry(privateKey, new Certificate[] { certificate }),
new KeyStore.PasswordProtection(password.toCharArray())
);
return keyStore;
} catch (Exception e) {
throw new IllegalArgumentException("Unable to get keystore from base64", e);
}
}
/**
* Initializes and returns a {@link KeyStore} from a list of paths to certificates in PEM format and a list of paths pointing to the corresponding private keys in PEM format.
*
* @param pemPathCertificates the list of certificate paths.
* @param pemPathPrivateKeys the the list of private key paths.
* @param password the password to use to protect the keystore. null if not password.
*
* @return the initialized keystore or an {@link IllegalArgumentException} if the certificates or private keys cannot be read or if the keystore can't be initialized.
*/
public static KeyStore initFromPems(List pemPathCertificates, List pemPathPrivateKeys, String password) {
if (pemPathCertificates.size() != pemPathPrivateKeys.size()) {
throw new IllegalArgumentException(
String.format(
"Mismatch between number of certificates (%s) and number of private keys (%s)",
pemPathCertificates.size(),
pemPathPrivateKeys.size()
)
);
}
try {
final KeyStore keyStore = KeyStore.getInstance(DEFAULT_KEYSTORE_TYPE);
final char[] charPassword = passwordToCharArray(password);
keyStore.load(null, charPassword);
for (int i = 0; i < pemPathCertificates.size(); i++) {
try (
InputStream certIs = new File(pemPathCertificates.get(i)).toURI().toURL().openStream();
InputStream keyIs = new File(pemPathPrivateKeys.get(i)).toURI().toURL().openStream()
) {
final Certificate[] certificates = loadPemCertificates(new String(certIs.readAllBytes()));
final PrivateKey privateKey = loadPemPrivateKey(new String(keyIs.readAllBytes()));
keyStore.setEntry(
DEFAULT_ALIAS + "-" + i,
new KeyStore.PrivateKeyEntry(privateKey, certificates),
new KeyStore.PasswordProtection(charPassword)
);
}
}
return keyStore;
} catch (Exception e) {
throw new IllegalArgumentException("Unable to initialize keystore from pem certificate and private key", e);
}
}
/**
* Initializes and returns a {@link KeyStore} from a certificate content in PEM format and a the corresponding private key content in PEM format.
*
* @param pemCertificate the content of the certificate in PEM format.
* @param pemPrivateKey the content of the private key in PEM format.
* @param password the password to use to protect the keystore. null if not password.
*
* @return the initialized keystore or an {@link IllegalArgumentException} if the certificate or private key cannot be read or if the keystore can't be initialized.
*/
public static KeyStore initFromPem(String pemCertificate, String pemPrivateKey, String password, String alias) {
try {
final KeyStore keyStore = KeyStore.getInstance(DEFAULT_KEYSTORE_TYPE);
final Certificate[] certificates = loadPemCertificates(pemCertificate);
final PrivateKey privateKey = loadPemPrivateKey(pemPrivateKey);
keyStore.load(null, passwordToCharArray(password));
keyStore.setEntry(
alias == null ? DEFAULT_ALIAS : alias,
new KeyStore.PrivateKeyEntry(privateKey, certificates),
new KeyStore.PasswordProtection(passwordToCharArray(password))
);
return keyStore;
} catch (Exception e) {
throw new IllegalArgumentException("Unable to initialize keystore from pem certificate and private key", e);
}
}
/**
* Returns the certificate chain from a PEM content.
*
* @param pem the content of the certificate chain in PEM format.
*
* @return the certificate chain or an {@link IllegalArgumentException} if the certificate chain cannot be read.
*/
public static Certificate[] loadPemCertificates(String pem) throws Exception {
JcaX509CertificateConverter converter = new JcaX509CertificateConverter().setProvider(new BouncyCastleProvider());
final PemReader pemReader = new PemReader(new StringReader(pem));
final List certificates = new ArrayList<>();
try (PEMParser pemParser = new PEMParser(pemReader)) {
Object o;
while ((o = pemParser.readObject()) != null) {
if (o instanceof X509CertificateHolder) {
X509Certificate certificate = converter.getCertificate((X509CertificateHolder) o);
if (certificate == null) {
continue;
}
certificates.add(certificate);
}
}
}
return certificates.toArray(new X509Certificate[0]);
}
/**
* Returns the private key from a PEM content.
*
* @param pem the content of the private key in PEM format.
*
* @return the private key or an {@link IllegalArgumentException} if the private key cannot be read or has not been found.
*/
public static PrivateKey loadPemPrivateKey(String pem) throws IOException {
final JcaPEMKeyConverter converter = new JcaPEMKeyConverter();
PemReader pemReader = new PemReader(new StringReader(pem));
try (PEMParser pemParser = new PEMParser(pemReader)) {
Object o;
while ((o = pemParser.readObject()) != null) {
if (o instanceof PEMKeyPair) {
PrivateKey privateKey = converter.getPrivateKey(((PEMKeyPair) o).getPrivateKeyInfo());
if (privateKey == null) {
continue;
}
return privateKey;
} else if (o instanceof PrivateKeyInfo) {
PrivateKey privateKey = converter.getPrivateKey((PrivateKeyInfo) o);
if (privateKey == null) {
continue;
}
return privateKey;
}
}
throw new IllegalArgumentException("No private key found for the specified pem content.");
}
}
/**
* Convert a password string into a char array.
* Return an empty char array if the specified password is null
*
* @param password the password to convert to char array.
*
* @return the corresponding char array.
*/
public static char[] passwordToCharArray(String password) {
return password != null ? password.toCharArray() : new char[0];
}
/**
* Find the first alias of the specified {@link KeyStore} and returns it as the default alias.
*
* @param keyStore the keystore from where to get the default alias.
*
* @return the first alias found or null if no alias has been found or an {@link IllegalArgumentException} if the alias can't be read from the specified {@link KeyStore}.
*/
public static String getDefaultAlias(KeyStore keyStore) {
try {
if (keyStore.aliases().hasMoreElements()) {
return keyStore.aliases().nextElement();
}
} catch (Exception e) {
throw new IllegalArgumentException("Unable to get default alias from keystore.", e);
}
return null;
}
/**
* Initialize a new {@link KeyStore} in PKCS12 format which is the combination of the 2 provided keystores.
* Note: for convenience, we assume the password is the same for both the source keystores.
*
* @param source1 the first keystore to merge.
* @param source2 the second keystore to merge.
* @param password the password that protects the source keystores.
*
* @return a new {@link KeyStore} which is the combination of the 2 source keystores or an {@link IllegalArgumentException} if one of the source keystores can't be read.
*/
public static KeyStore merge(KeyStore source1, KeyStore source2, String password) {
return merge(asList(source1, source2), password);
}
/**
* Initialize a new {@link KeyStore} in PKCS12 format which is the combination of all the provided keystores.
* Note: for convenience, we assume the password is the same for all the source keystores.
*
* @param sources the keystores to merge.
* @param password the password that protects the source keystores.
*
* @return a new {@link KeyStore} which is the combination of all the source keystores or an {@link IllegalArgumentException} if one of the source keystores can't be read.
*/
public static KeyStore merge(List sources, String password) {
try {
final KeyStore destination = KeyStore.getInstance(DEFAULT_KEYSTORE_TYPE);
destination.load(null, passwordToCharArray(password));
sources.forEach(source -> copy(source, destination, password));
return destination;
} catch (Exception e) {
throw new IllegalArgumentException("Unable to merge the 2 keystores", e);
}
}
/**
* Copy all the {@link KeyStore}'s entries from source to destination {@link KeyStore}.
* Note: for convenience, we assume the password is the same for all the source keystores.
*
* @param source the source {@link KeyStore} containing the entries to copy.
* @param destination the destination {@link KeyStore}.
* @param password the password that protects the source keystores.
*
* @throws IllegalArgumentException if one of the keystores can be read or if copy to the destination {@link KeyStore} creates duplicate aliases.
*/
public static void copy(KeyStore source, KeyStore destination, String password) {
try {
final KeyStore.PasswordProtection passwordProtection = new KeyStore.PasswordProtection(passwordToCharArray(password));
final Enumeration aliases = source.aliases();
while (aliases.hasMoreElements()) {
String alias = aliases.nextElement();
final KeyStore.Entry entry = source.getEntry(alias, passwordProtection);
if (destination.containsAlias(alias)) {
throw new IllegalArgumentException(
String.format("The alias [%s] is present in both keystores. Aliases must be unique.", alias)
);
}
destination.setEntry(alias, entry, passwordProtection);
}
} catch (Exception e) {
throw new IllegalArgumentException("Unable to copy source keystore into destination keystore", e);
}
}
/**
* Returns a {@link Map} with the following structure:
*
* - key: a domain name (or wildcard domain)
* - value: the matching alias
*
*
* The list of the domain names is extracted from certificate Common Name (CN) and Subject Alternative Names (SAN).
* If multiple certificates matches the same CN or SAN, the last one will be kept.
*
* @param keyStore the {@link KeyStore} from where to extract the domain names and aliases or an {@link IllegalArgumentException} if the CN or SAN cannot be read from the specified {@link KeyStore}.
*
* @return the map of domain names and corresponding aliases.
*/
public static Map getCommonNamesByAlias(KeyStore keyStore) {
try {
Map names = new HashMap<>();
final Enumeration aliases = keyStore.aliases();
while (aliases.hasMoreElements()) {
String alias = aliases.nextElement();
final Certificate certificate = keyStore.getCertificate(alias);
if (certificate instanceof X509Certificate) {
final X509Certificate x509Certificate = (X509Certificate) certificate;
final X500Name x500name = new JcaX509CertificateHolder(x509Certificate).getSubject();
final RDN[] rdNs = x500name.getRDNs(BCStyle.CN);
if (rdNs.length > 0) {
names.put(IETFUtils.valueToString(rdNs[0].getFirst().getValue()), alias);
}
Collection> altNames = x509Certificate.getSubjectAlternativeNames();
if (altNames != null) {
altNames
.stream()
.filter(entry -> (int) entry.get(0) == DNSNAME)
.forEach(entry -> names.put(entry.get(1).toString(), alias));
}
}
}
return names;
} catch (Exception e) {
throw new IllegalArgumentException("Unable to extract CN/SAN from keystore.", e);
}
}
}
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