org.argeo.cms/src/org/argeo/cms/internal/runtime/PkiUtils.java

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