--- /dev/null
+package org.argeo.cms.bc;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.io.Reader;
+import java.math.BigInteger;
+import java.net.InetAddress;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.security.GeneralSecurityException;
+import java.security.KeyPair;
+import java.security.KeyPairGenerator;
+import java.security.KeyStore;
+import java.security.PrivateKey;
+import java.security.SecureRandom;
+import java.security.Security;
+import java.security.cert.Certificate;
+import java.security.cert.CertificateException;
+import java.security.cert.X509Certificate;
+import java.util.Arrays;
+import java.util.Date;
+
+import javax.security.auth.x500.X500Principal;
+
+import org.argeo.api.cms.CmsLog;
+import org.bouncycastle.asn1.pkcs.PrivateKeyInfo;
+import org.bouncycastle.cert.X509CertificateHolder;
+import org.bouncycastle.cert.X509v3CertificateBuilder;
+import org.bouncycastle.cert.jcajce.JcaX509CertificateConverter;
+import org.bouncycastle.cert.jcajce.JcaX509v3CertificateBuilder;
+import org.bouncycastle.jce.provider.BouncyCastleProvider;
+import org.bouncycastle.openssl.PEMParser;
+import org.bouncycastle.openssl.jcajce.JcaPEMKeyConverter;
+import org.bouncycastle.openssl.jcajce.JceOpenSSLPKCS8DecryptorProviderBuilder;
+import org.bouncycastle.operator.ContentSigner;
+import org.bouncycastle.operator.InputDecryptorProvider;
+import org.bouncycastle.operator.OperatorCreationException;
+import org.bouncycastle.operator.jcajce.JcaContentSignerBuilder;
+import org.bouncycastle.pkcs.PKCS8EncryptedPrivateKeyInfo;
+import org.bouncycastle.pkcs.PKCSException;
+
+/** Utilities around the BouncyCastle crypto library. */
+public class BcUtils {
+ private final static CmsLog log = CmsLog.getLog(BcUtils.class);
+
+ private final static String BC_SECURITY_PROVIDER;
+ static {
+ Security.addProvider(new BouncyCastleProvider());
+ BC_SECURITY_PROVIDER = "BC";
+ }
+
+ public static void createSelfSignedKeyStore(Path keyStorePath, char[] keyStorePassword, String keyStoreType) {
+ // for (Provider provider : Security.getProviders())
+ // System.out.println(provider.getName());
+ // File keyStoreFile = keyStorePath.toFile();
+ char[] keyPwd = Arrays.copyOf(keyStorePassword, keyStorePassword.length);
+ if (!Files.exists(keyStorePath)) {
+ try {
+ Files.createDirectories(keyStorePath.getParent());
+ KeyStore keyStore = getKeyStore(keyStorePath, keyStorePassword, keyStoreType);
+ generateSelfSignedCertificate(keyStore,
+ new X500Principal("CN=" + InetAddress.getLocalHost().getHostName() + ",OU=UNSECURE,O=UNSECURE"),
+ 1024, keyPwd);
+ saveKeyStore(keyStorePath, keyStorePassword, keyStore);
+ if (log.isDebugEnabled())
+ log.debug("Created self-signed unsecure keystore " + keyStorePath);
+ } catch (Exception e) {
+ try {
+ if (Files.size(keyStorePath) == 0)
+ Files.delete(keyStorePath);
+ } catch (IOException e1) {
+ // silent
+ }
+ log.error("Cannot create keystore " + keyStorePath, e);
+ }
+ } else {
+ throw new IllegalStateException("Keystore " + keyStorePath + " already exists");
+ }
+ }
+
+ public static X509Certificate generateSelfSignedCertificate(KeyStore keyStore, X500Principal x500Principal,
+ int keySize, char[] keyPassword) {
+ try {
+ KeyPairGenerator kpGen = KeyPairGenerator.getInstance("RSA", BC_SECURITY_PROVIDER);
+ kpGen.initialize(keySize, new SecureRandom());
+ KeyPair pair = kpGen.generateKeyPair();
+ Date notBefore = new Date(System.currentTimeMillis() - 10000);
+ Date notAfter = new Date(System.currentTimeMillis() + 365 * 24L * 3600 * 1000);
+ BigInteger serial = BigInteger.valueOf(System.currentTimeMillis());
+ X509v3CertificateBuilder certGen = new JcaX509v3CertificateBuilder(x500Principal, serial, notBefore,
+ notAfter, x500Principal, pair.getPublic());
+ ContentSigner sigGen = new JcaContentSignerBuilder("SHA256WithRSAEncryption")
+ .setProvider(BC_SECURITY_PROVIDER).build(pair.getPrivate());
+ X509Certificate cert = new JcaX509CertificateConverter().setProvider(BC_SECURITY_PROVIDER)
+ .getCertificate(certGen.build(sigGen));
+ cert.checkValidity(new Date());
+ cert.verify(cert.getPublicKey());
+
+ keyStore.setKeyEntry(x500Principal.getName(), pair.getPrivate(), keyPassword, new Certificate[] { cert });
+ return cert;
+ } catch (GeneralSecurityException | OperatorCreationException e) {
+ throw new RuntimeException("Cannot generate self-signed certificate", e);
+ }
+ }
+
+ public static PrivateKey loadPemPrivateKey(Reader reader, char[] keyPassword) {
+ try (PEMParser pemParser = new PEMParser(reader)) {
+ JcaPEMKeyConverter converter = new JcaPEMKeyConverter().setProvider(BC_SECURITY_PROVIDER);
+ Object object = pemParser.readObject();
+ PrivateKeyInfo privateKeyInfo;
+ if (object instanceof PKCS8EncryptedPrivateKeyInfo) {
+ if (keyPassword == null)
+ throw new IllegalArgumentException("A key password is required");
+ InputDecryptorProvider decProv = new JceOpenSSLPKCS8DecryptorProviderBuilder().build(keyPassword);
+ privateKeyInfo = ((PKCS8EncryptedPrivateKeyInfo) object).decryptPrivateKeyInfo(decProv);
+ } else if (object instanceof PrivateKeyInfo) {
+ privateKeyInfo = (PrivateKeyInfo) object;
+ } else {
+ throw new IllegalArgumentException("Unsupported format for private key");
+ }
+ return converter.getPrivateKey(privateKeyInfo);
+ } catch (IOException | OperatorCreationException | PKCSException e) {
+ throw new RuntimeException("Cannot read private key", e);
+ }
+ }
+
+ public static X509Certificate loadPemCertificate(Reader reader) {
+ try (PEMParser pemParser = new PEMParser(reader)) {
+ X509CertificateHolder certHolder = (X509CertificateHolder) pemParser.readObject();
+ X509Certificate cert = new JcaX509CertificateConverter().setProvider(BC_SECURITY_PROVIDER)
+ .getCertificate(certHolder);
+ return cert;
+ } catch (IOException | CertificateException e) {
+ throw new RuntimeException("Cannot read private key", e);
+ }
+ }
+
+ private static KeyStore getKeyStore(Path keyStoreFile, char[] keyStorePassword, String keyStoreType) {
+ try {
+ KeyStore store = KeyStore.getInstance(keyStoreType, BC_SECURITY_PROVIDER);
+ if (Files.exists(keyStoreFile)) {
+ try (InputStream fis = Files.newInputStream(keyStoreFile)) {
+ store.load(fis, keyStorePassword);
+ }
+ } else {
+ store.load(null);
+ }
+ return store;
+ } catch (GeneralSecurityException | IOException e) {
+ throw new RuntimeException("Cannot load keystore " + keyStoreFile, e);
+ }
+ }
+
+ private static void saveKeyStore(Path keyStoreFile, char[] keyStorePassword, KeyStore keyStore) {
+ try {
+ try (OutputStream fis = Files.newOutputStream(keyStoreFile)) {
+ keyStore.store(fis, keyStorePassword);
+ }
+ } catch (GeneralSecurityException | IOException e) {
+ throw new RuntimeException("Cannot save keystore " + keyStoreFile, e);
+ }
+ }
+
+ /** singleton */
+ private BcUtils() {
+ }
+}
projects / lgpl / argeo-commons.git / blobdiff