org.argeo.cms/src/org/argeo/cms/security/PkiUtils.java

   1 package org.argeo.cms.security;
   2
   3 import java.io.IOException;
   4 import java.io.InputStream;
   5 import java.io.OutputStream;
   6 import java.io.Reader;
   7 import java.math.BigInteger;
   8 import java.net.InetAddress;
   9 import java.nio.file.Files;
  10 import java.nio.file.Path;
  11 import java.security.GeneralSecurityException;
  12 import java.security.KeyPair;
  13 import java.security.KeyPairGenerator;
  14 import java.security.KeyStore;
  15 import java.security.KeyStoreException;
  16 import java.security.PrivateKey;
  17 import java.security.SecureRandom;
  18 import java.security.Security;
  19 import java.security.cert.Certificate;
  20 import java.security.cert.CertificateException;
  21 import java.security.cert.X509Certificate;
  22 import java.util.Arrays;
  23 import java.util.Date;
  24
  25 import javax.security.auth.x500.X500Principal;
  26
  27 import org.argeo.api.cms.CmsConstants;
  28 import org.argeo.api.cms.CmsLog;
  29 import org.argeo.cms.internal.runtime.KernelConstants;
  30 import org.bouncycastle.asn1.pkcs.PrivateKeyInfo;
  31 import org.bouncycastle.cert.X509CertificateHolder;
  32 import org.bouncycastle.cert.X509v3CertificateBuilder;
  33 import org.bouncycastle.cert.jcajce.JcaX509CertificateConverter;
  34 import org.bouncycastle.cert.jcajce.JcaX509v3CertificateBuilder;
  35 import org.bouncycastle.jce.provider.BouncyCastleProvider;
  36 import org.bouncycastle.openssl.PEMParser;
  37 import org.bouncycastle.openssl.jcajce.JcaPEMKeyConverter;
  38 import org.bouncycastle.openssl.jcajce.JceOpenSSLPKCS8DecryptorProviderBuilder;
  39 import org.bouncycastle.operator.ContentSigner;
  40 import org.bouncycastle.operator.InputDecryptorProvider;
  41 import org.bouncycastle.operator.OperatorCreationException;
  42 import org.bouncycastle.operator.jcajce.JcaContentSignerBuilder;
  43 import org.bouncycastle.pkcs.PKCS8EncryptedPrivateKeyInfo;
  44 import org.bouncycastle.pkcs.PKCSException;
  45
  46 /**
  47  * Utilities around private keys and certificate, mostly wrapping BouncyCastle
  48  * implementations.
  49  */
  50 public class PkiUtils {
  51         private final static CmsLog log = CmsLog.getLog(PkiUtils.class);
  52
  53         public final static String PKCS12 = "PKCS12";
  54         public static final String DEFAULT_KEYSTORE_PATH = KernelConstants.DIR_NODE + '/' + CmsConstants.NODE + ".p12";
  55
  56         public static final String DEFAULT_PEM_KEY_PATH = KernelConstants.DIR_NODE + '/' + CmsConstants.NODE + ".key";
  57
  58         public static final String DEFAULT_PEM_CERT_PATH = KernelConstants.DIR_NODE + '/' + CmsConstants.NODE + ".crt";
  59
  60         private final static String SECURITY_PROVIDER;
  61         static {
  62                 Security.addProvider(new BouncyCastleProvider());
  63                 SECURITY_PROVIDER = "BC";
  64         }
  65
  66         public static X509Certificate generateSelfSignedCertificate(KeyStore keyStore, X500Principal x500Principal,
  67                         int keySize, char[] keyPassword) {
  68                 try {
  69                         KeyPairGenerator kpGen = KeyPairGenerator.getInstance("RSA", SECURITY_PROVIDER);
  70                         kpGen.initialize(keySize, new SecureRandom());
  71                         KeyPair pair = kpGen.generateKeyPair();
  72                         Date notBefore = new Date(System.currentTimeMillis() - 10000);
  73                         Date notAfter = new Date(System.currentTimeMillis() + 365 * 24L * 3600 * 1000);
  74                         BigInteger serial = BigInteger.valueOf(System.currentTimeMillis());
  75                         X509v3CertificateBuilder certGen = new JcaX509v3CertificateBuilder(x500Principal, serial, notBefore,
  76                                         notAfter, x500Principal, pair.getPublic());
  77                         ContentSigner sigGen = new JcaContentSignerBuilder("SHA256WithRSAEncryption").setProvider(SECURITY_PROVIDER)
  78                                         .build(pair.getPrivate());
  79                         X509Certificate cert = new JcaX509CertificateConverter().setProvider(SECURITY_PROVIDER)
  80                                         .getCertificate(certGen.build(sigGen));
  81                         cert.checkValidity(new Date());
  82                         cert.verify(cert.getPublicKey());
  83
  84                         keyStore.setKeyEntry(x500Principal.getName(), pair.getPrivate(), keyPassword, new Certificate[] { cert });
  85                         return cert;
  86                 } catch (GeneralSecurityException | OperatorCreationException e) {
  87                         throw new RuntimeException("Cannot generate self-signed certificate", e);
  88                 }
  89         }
  90
  91         public static KeyStore getKeyStore(Path keyStoreFile, char[] keyStorePassword, String keyStoreType) {
  92                 try {
  93                         KeyStore store = KeyStore.getInstance(keyStoreType, SECURITY_PROVIDER);
  94                         if (Files.exists(keyStoreFile)) {
  95                                 try (InputStream fis = Files.newInputStream(keyStoreFile)) {
  96                                         store.load(fis, keyStorePassword);
  97                                 }
  98                         } else {
  99                                 store.load(null);
 100                         }
 101                         return store;
 102                 } catch (GeneralSecurityException | IOException e) {
 103                         throw new RuntimeException("Cannot load keystore " + keyStoreFile, e);
 104                 }
 105         }
 106
 107         public static void saveKeyStore(Path keyStoreFile, char[] keyStorePassword, KeyStore keyStore) {
 108                 try {
 109                         try (OutputStream fis = Files.newOutputStream(keyStoreFile)) {
 110                                 keyStore.store(fis, keyStorePassword);
 111                         }
 112                 } catch (GeneralSecurityException | IOException e) {
 113                         throw new RuntimeException("Cannot save keystore " + keyStoreFile, e);
 114                 }
 115         }
 116
 117 //      public static byte[] pemToPKCS12(final String keyFile, final String cerFile, final String password)
 118 //                      throws Exception {
 119 //              // Get the private key
 120 //              FileReader reader = new FileReader(keyFile);
 121 //
 122 //              PEMReader pem = new PemReader(reader, new PasswordFinder() {
 123 //                      @Override
 124 //                      public char[] getPassword() {
 125 //                              return password.toCharArray();
 126 //                      }
 127 //              });
 128 //
 129 //              PrivateKey key = ((KeyPair) pem.readObject()).getPrivate();
 130 //
 131 //              pem.close();
 132 //              reader.close();
 133 //
 134 //              // Get the certificate
 135 //              reader = new FileReader(cerFile);
 136 //              pem = new PEMReader(reader);
 137 //
 138 //              X509Certificate cert = (X509Certificate) pem.readObject();
 139 //
 140 //              pem.close();
 141 //              reader.close();
 142 //
 143 //              // Put them into a PKCS12 keystore and write it to a byte[]
 144 //              ByteArrayOutputStream bos = new ByteArrayOutputStream();
 145 //              KeyStore ks = KeyStore.getInstance("PKCS12");
 146 //              ks.load(null);
 147 //              ks.setKeyEntry("alias", (Key) key, password.toCharArray(), new java.security.cert.Certificate[] { cert });
 148 //              ks.store(bos, password.toCharArray());
 149 //              bos.close();
 150 //              return bos.toByteArray();
 151 //      }
 152
 153         public static void loadPem(KeyStore keyStore, Reader key, char[] keyPassword, Reader cert) {
 154                 PrivateKey privateKey = loadPemPrivateKey(key, keyPassword);
 155                 X509Certificate certificate = loadPemCertificate(cert);
 156                 try {
 157                         keyStore.setKeyEntry(certificate.getSubjectX500Principal().getName(), privateKey, keyPassword,
 158                                         new java.security.cert.Certificate[] { certificate });
 159                 } catch (KeyStoreException e) {
 160                         throw new RuntimeException("Cannot store PEM certificate", e);
 161                 }
 162         }
 163
 164         public static PrivateKey loadPemPrivateKey(Reader reader, char[] keyPassword) {
 165                 try (PEMParser pemParser = new PEMParser(reader)) {
 166                         JcaPEMKeyConverter converter = new JcaPEMKeyConverter().setProvider("BC");
 167                         Object object = pemParser.readObject();
 168                         PrivateKeyInfo privateKeyInfo;
 169                         if (object instanceof PKCS8EncryptedPrivateKeyInfo) {
 170                                 if (keyPassword == null)
 171                                         throw new IllegalArgumentException("A key password is required");
 172                                 InputDecryptorProvider decProv = new JceOpenSSLPKCS8DecryptorProviderBuilder().build(keyPassword);
 173                                 privateKeyInfo = ((PKCS8EncryptedPrivateKeyInfo) object).decryptPrivateKeyInfo(decProv);
 174                         } else if (object instanceof PrivateKeyInfo) {
 175                                 privateKeyInfo = (PrivateKeyInfo) object;
 176                         } else {
 177                                 throw new IllegalArgumentException("Unsupported format for private key");
 178                         }
 179                         return converter.getPrivateKey(privateKeyInfo);
 180                 } catch (IOException | OperatorCreationException | PKCSException e) {
 181                         throw new RuntimeException("Cannot read private key", e);
 182                 }
 183         }
 184
 185         public static X509Certificate loadPemCertificate(Reader reader) {
 186                 try (PEMParser pemParser = new PEMParser(reader)) {
 187                         X509CertificateHolder certHolder = (X509CertificateHolder) pemParser.readObject();
 188                         X509Certificate cert = new JcaX509CertificateConverter().setProvider(SECURITY_PROVIDER)
 189                                         .getCertificate(certHolder);
 190                         return cert;
 191                 } catch (IOException | CertificateException e) {
 192                         throw new RuntimeException("Cannot read private key", e);
 193                 }
 194         }
 195
 196         public static void main(String[] args) throws Exception {
 197                 final String ALGORITHM = "RSA";
 198                 final String provider = "BC";
 199                 SecureRandom secureRandom = new SecureRandom();
 200                 long begin = System.currentTimeMillis();
 201                 for (int i = 512; i < 1024; i = i + 2) {
 202                         try {
 203                                 KeyPairGenerator keyGen = KeyPairGenerator.getInstance(ALGORITHM, provider);
 204                                 keyGen.initialize(i, secureRandom);
 205                                 keyGen.generateKeyPair();
 206                         } catch (Exception e) {
 207                                 System.err.println(i + " : " + e.getMessage());
 208                         }
 209                 }
 210                 System.out.println((System.currentTimeMillis() - begin) + " ms");
 211
 212                 // // String text = "a";
 213                 // String text =
 214                 // "testtesttesttesttesttesttesttesttesttesttesttesttesttesttest";
 215                 // try {
 216                 // System.out.println(text);
 217                 // PrivateKey privateKey;
 218                 // PublicKey publicKey;
 219                 // char[] password = "changeit".toCharArray();
 220                 // String alias = "CN=test";
 221                 // KeyStore keyStore = KeyStore.getInstance("pkcs12");
 222                 // File p12file = new File("test.p12");
 223                 // p12file.delete();
 224                 // if (!p12file.exists()) {
 225                 // keyStore.load(null);
 226                 // generateSelfSignedCertificate(keyStore, new X500Principal(alias),
 227                 // 513, password);
 228                 // try (OutputStream out = new FileOutputStream(p12file)) {
 229                 // keyStore.store(out, password);
 230                 // }
 231                 // }
 232                 // try (InputStream in = new FileInputStream(p12file)) {
 233                 // keyStore.load(in, password);
 234                 // privateKey = (PrivateKey) keyStore.getKey(alias, password);
 235                 // publicKey = keyStore.getCertificateChain(alias)[0].getPublicKey();
 236                 // }
 237                 // // KeyPair key;
 238                 // // final KeyPairGenerator keyGen =
 239                 // // KeyPairGenerator.getInstance(ALGORITHM);
 240                 // // keyGen.initialize(4096, new SecureRandom());
 241                 // // long begin = System.currentTimeMillis();
 242                 // // key = keyGen.generateKeyPair();
 243                 // // System.out.println((System.currentTimeMillis() - begin) + " ms");
 244                 // // keyStore.load(null);
 245                 // // keyStore.setKeyEntry("test", key.getPrivate(), password, null);
 246                 // // try(OutputStream out=new FileOutputStream(p12file)) {
 247                 // // keyStore.store(out, password);
 248                 // // }
 249                 // // privateKey = key.getPrivate();
 250                 // // publicKey = key.getPublic();
 251                 //
 252                 // Cipher encrypt = Cipher.getInstance(ALGORITHM);
 253                 // encrypt.init(Cipher.ENCRYPT_MODE, publicKey);
 254                 // byte[] encrypted = encrypt.doFinal(text.getBytes());
 255                 // String encryptedBase64 =
 256                 // Base64.getEncoder().encodeToString(encrypted);
 257                 // System.out.println(encryptedBase64);
 258                 // byte[] encryptedFromBase64 =
 259                 // Base64.getDecoder().decode(encryptedBase64);
 260                 //
 261                 // Cipher decrypt = Cipher.getInstance(ALGORITHM);
 262                 // decrypt.init(Cipher.DECRYPT_MODE, privateKey);
 263                 // byte[] decrypted = decrypt.doFinal(encryptedFromBase64);
 264                 // System.out.println(new String(decrypted));
 265                 // } catch (Exception e) {
 266                 // e.printStackTrace();
 267                 // }
 268
 269         }
 270
 271         public static void createSelfSignedKeyStore(Path keyStorePath, char[] keyStorePassword, String keyStoreType) {
 272                 // for (Provider provider : Security.getProviders())
 273                 // System.out.println(provider.getName());
 274                 // File keyStoreFile = keyStorePath.toFile();
 275                 char[] keyPwd = Arrays.copyOf(keyStorePassword, keyStorePassword.length);
 276                 if (!Files.exists(keyStorePath)) {
 277                         try {
 278                                 Files.createDirectories(keyStorePath.getParent());
 279                                 KeyStore keyStore = getKeyStore(keyStorePath, keyStorePassword, keyStoreType);
 280                                 generateSelfSignedCertificate(keyStore,
 281                                                 new X500Principal("CN=" + InetAddress.getLocalHost().getHostName() + ",OU=UNSECURE,O=UNSECURE"),
 282                                                 1024, keyPwd);
 283                                 saveKeyStore(keyStorePath, keyStorePassword, keyStore);
 284                                 if (log.isDebugEnabled())
 285                                         log.debug("Created self-signed unsecure keystore " + keyStorePath);
 286                         } catch (Exception e) {
 287                                 try {
 288                                         if (Files.size(keyStorePath) == 0)
 289                                                 Files.delete(keyStorePath);
 290                                 } catch (IOException e1) {
 291                                         // silent
 292                                 }
 293                                 log.error("Cannot create keystore " + keyStorePath, e);
 294                         }
 295                 } else {
 296                         throw new IllegalStateException("Keystore " + keyStorePath + " already exists");
 297                 }
 298         }
 299
 300 }