예제 #1
0
 /**
  * Returns the key size of the given key object.
  *
  * @param key the key object.
  * @return the key size of the given key object.
  * @exception InvalidKeyException if <code>key</code> is invalid.
  */
 protected int engineGetKeySize(Key key) throws InvalidKeyException {
   byte[] encoded = key.getEncoded();
   if (encoded.length != 8) {
     throw new InvalidKeyException("Invalid key length: " + encoded.length + " bytes");
   }
   return 56;
 }
예제 #2
0
  /**
   * Assigns the given key to the given alias, protecting it with the given password.
   *
   * <p>If the given key is of type <code>java.security.PrivateKey</code>, it must be accompanied by
   * a certificate chain certifying the corresponding public key.
   *
   * <p>If the given alias already exists, the keystore information associated with it is overridden
   * by the given key (and possibly certificate chain).
   *
   * @param alias the alias name
   * @param key the key to be associated with the alias
   * @param password the password to protect the key
   * @param chain the certificate chain for the corresponding public key (only required if the given
   *     key is of type <code>java.security.PrivateKey</code>).
   * @exception KeyStoreException if the given key cannot be protected, or this operation fails for
   *     some other reason
   */
  public void engineSetKeyEntry(String alias, Key key, char[] password, Certificate[] chain)
      throws KeyStoreException {
    permissionCheck();

    synchronized (entries) {
      try {
        KeyEntry entry = new KeyEntry();
        entry.date = new Date();

        if (key instanceof PrivateKey) {
          if ((key.getFormat().equals("PKCS#8")) || (key.getFormat().equals("PKCS8"))) {
            entry.protectedPrivKey = encryptPrivateKey(key.getEncoded(), password);
            entry.password = password.clone();
          } else {
            throw new KeyStoreException("Private key is not encoded as PKCS#8");
          }
        } else {
          throw new KeyStoreException("Key is not a PrivateKey");
        }

        // clone the chain
        if (chain != null) {
          if ((chain.length > 1) && !validateChain(chain)) {
            throw new KeyStoreException("Certificate chain does not validate");
          }

          entry.chain = chain.clone();
          entry.chainRefs = new long[entry.chain.length];
        }

        String lowerAlias = alias.toLowerCase();
        if (entries.get(lowerAlias) != null) {
          deletedEntries.put(lowerAlias, entries.get(lowerAlias));
        }

        entries.put(lowerAlias, entry);
        addedEntries.put(lowerAlias, entry);
      } catch (Exception nsae) {
        KeyStoreException ke = new KeyStoreException("Key protection algorithm not found: " + nsae);
        ke.initCause(nsae);
        throw ke;
      }
    }
  }
예제 #3
0
  void implInit(
      int opmode, Key key, AlgorithmParameterSpec params, SecureRandom random, CipherSpi cipherImpl)
      throws InvalidKeyException, InvalidAlgorithmParameterException {
    char[] passwdChars = null;
    salt = null;
    iCount = 0;
    if (key instanceof javax.crypto.interfaces.PBEKey) {
      javax.crypto.interfaces.PBEKey pbeKey = (javax.crypto.interfaces.PBEKey) key;
      passwdChars = pbeKey.getPassword();
      salt = pbeKey.getSalt(); // maybe null if unspecified
      iCount = pbeKey.getIterationCount(); // maybe 0 if unspecified
    } else if (key instanceof SecretKey) {
      byte[] passwdBytes = key.getEncoded();
      if ((passwdBytes == null) || !(key.getAlgorithm().regionMatches(true, 0, "PBE", 0, 3))) {
        throw new InvalidKeyException("Missing password");
      }
      passwdChars = new char[passwdBytes.length];
      for (int i = 0; i < passwdChars.length; i++) {
        passwdChars[i] = (char) (passwdBytes[i] & 0x7f);
      }
    } else {
      throw new InvalidKeyException("SecretKey of PBE type required");
    }

    if (((opmode == Cipher.DECRYPT_MODE) || (opmode == Cipher.UNWRAP_MODE))
        && ((params == null) && ((salt == null) || (iCount == 0)))) {
      throw new InvalidAlgorithmParameterException("Parameters missing");
    }

    if (params == null) {
      // generate default for salt and iteration count if necessary
      if (salt == null) {
        salt = new byte[DEFAULT_SALT_LENGTH];
        if (random != null) {
          random.nextBytes(salt);
        } else {
          SunJCE.getRandom().nextBytes(salt);
        }
      }
      if (iCount == 0) iCount = DEFAULT_COUNT;
    } else if (!(params instanceof PBEParameterSpec)) {
      throw new InvalidAlgorithmParameterException("PBEParameterSpec type required");
    } else {
      PBEParameterSpec pbeParams = (PBEParameterSpec) params;
      // make sure the parameter values are consistent
      if (salt != null) {
        if (!Arrays.equals(salt, pbeParams.getSalt())) {
          throw new InvalidAlgorithmParameterException(
              "Inconsistent value of salt between key and params");
        }
      } else {
        salt = pbeParams.getSalt();
      }
      if (iCount != 0) {
        if (iCount != pbeParams.getIterationCount()) {
          throw new InvalidAlgorithmParameterException(
              "Different iteration count between key and params");
        }
      } else {
        iCount = pbeParams.getIterationCount();
      }
    }
    // salt is recommended to be ideally as long as the output
    // of the hash function. However, it may be too strict to
    // force this; so instead, we'll just require the minimum
    // salt length to be 8-byte which is what PKCS#5 recommends
    // and openssl does.
    if (salt.length < 8) {
      throw new InvalidAlgorithmParameterException("Salt must be at least 8 bytes long");
    }
    if (iCount <= 0) {
      throw new InvalidAlgorithmParameterException("IterationCount must be a positive number");
    }
    byte[] derivedKey = derive(passwdChars, salt, iCount, keySize, CIPHER_KEY);
    SecretKey cipherKey = new SecretKeySpec(derivedKey, algo);

    if (cipherImpl != null && cipherImpl instanceof ARCFOURCipher) {
      ((ARCFOURCipher) cipherImpl).engineInit(opmode, cipherKey, random);

    } else {
      byte[] derivedIv = derive(passwdChars, salt, iCount, 8, CIPHER_IV);
      IvParameterSpec ivSpec = new IvParameterSpec(derivedIv, 0, 8);

      // initialize the underlying cipher
      cipher.init(opmode, cipherKey, ivSpec, random);
    }
  }