예제 #1
0
  @SuppressWarnings("deprecation")
  private byte[] fetchPrivateKeyFromBag(byte[] privateKeyInfo)
      throws IOException, NoSuchAlgorithmException, CertificateException {
    byte[] returnValue = null;
    DerValue val = new DerValue(new ByteArrayInputStream(privateKeyInfo));
    DerInputStream s = val.toDerInputStream();
    int version = s.getInteger();

    if (version != 3) {
      throw new IOException("PKCS12 keystore not in version 3 format");
    }

    /*
     * Read the authSafe.
     */
    byte[] authSafeData;
    ContentInfo authSafe = new ContentInfo(s);
    ObjectIdentifier contentType = authSafe.getContentType();

    if (contentType.equals(ContentInfo.DATA_OID)) {
      authSafeData = authSafe.getData();
    } else /* signed data */ {
      throw new IOException("public key protected PKCS12 not supported");
    }

    DerInputStream as = new DerInputStream(authSafeData);
    DerValue[] safeContentsArray = as.getSequence(2);
    int count = safeContentsArray.length;

    /*
     * Spin over the ContentInfos.
     */
    for (int i = 0; i < count; i++) {
      byte[] safeContentsData;
      ContentInfo safeContents;
      DerInputStream sci;
      byte[] eAlgId = null;

      sci = new DerInputStream(safeContentsArray[i].toByteArray());
      safeContents = new ContentInfo(sci);
      contentType = safeContents.getContentType();
      safeContentsData = null;

      if (contentType.equals(ContentInfo.DATA_OID)) {
        safeContentsData = safeContents.getData();
      } else if (contentType.equals(ContentInfo.ENCRYPTED_DATA_OID)) {
        // The password was used to export the private key from the keychain.
        // The Keychain won't export the key with encrypted data, so we don't need
        // to worry about it.
        continue;
      } else {
        throw new IOException("public key protected PKCS12" + " not supported");
      }
      DerInputStream sc = new DerInputStream(safeContentsData);
      returnValue = extractKeyData(sc);
    }

    return returnValue;
  }
예제 #2
0
  /**
   * Make a DH public key from its DER encoding (X.509).
   *
   * @param encodedKey the encoded key
   * @exception InvalidKeyException if the encoded key does not represent a Diffie-Hellman public
   *     key
   */
  DHPublicKey(byte[] encodedKey) throws InvalidKeyException {
    InputStream inStream = new ByteArrayInputStream(encodedKey);
    try {
      DerValue derKeyVal = new DerValue(inStream);
      if (derKeyVal.tag != DerValue.tag_Sequence) {
        throw new InvalidKeyException("Invalid key format");
      }

      /*
       * Parse the algorithm identifier
       */
      DerValue algid = derKeyVal.data.getDerValue();
      if (algid.tag != DerValue.tag_Sequence) {
        throw new InvalidKeyException("AlgId is not a SEQUENCE");
      }
      DerInputStream derInStream = algid.toDerInputStream();
      ObjectIdentifier oid = derInStream.getOID();
      if (oid == null) {
        throw new InvalidKeyException("Null OID");
      }
      if (derInStream.available() == 0) {
        throw new InvalidKeyException("Parameters missing");
      }

      /*
       * Parse the parameters
       */
      DerValue params = derInStream.getDerValue();
      if (params.tag == DerValue.tag_Null) {
        throw new InvalidKeyException("Null parameters");
      }
      if (params.tag != DerValue.tag_Sequence) {
        throw new InvalidKeyException("Parameters not a SEQUENCE");
      }
      params.data.reset();
      this.p = params.data.getBigInteger();
      this.g = params.data.getBigInteger();
      // Private-value length is OPTIONAL
      if (params.data.available() != 0) {
        this.l = params.data.getInteger();
      }
      if (params.data.available() != 0) {
        throw new InvalidKeyException("Extra parameter data");
      }

      /*
       * Parse the key
       */
      this.key = derKeyVal.data.getBitString();
      parseKeyBits();
      if (derKeyVal.data.available() != 0) {
        throw new InvalidKeyException("Excess key data");
      }

      this.encodedKey = (byte[]) encodedKey.clone();

    } catch (NumberFormatException e) {
      throw new InvalidKeyException("Private-value length too big");

    } catch (IOException e) {
      throw new InvalidKeyException("Error parsing key encoding: " + e.toString());
    }
  }
예제 #3
0
  /**
   * Returns the key associated with the given alias, using the given password to recover it.
   *
   * @param alias the alias name
   * @param password the password for recovering the key. This password is used internally as the
   *     key is exported in a PKCS12 format.
   * @return the requested key, or null if the given alias does not exist or does not identify a
   *     <i>key entry</i>.
   * @exception NoSuchAlgorithmException if the algorithm for recovering the key cannot be found
   * @exception UnrecoverableKeyException if the key cannot be recovered (e.g., the given password
   *     is wrong).
   */
  public Key engineGetKey(String alias, char[] password)
      throws NoSuchAlgorithmException, UnrecoverableKeyException {
    permissionCheck();

    // An empty password is rejected by MacOS API, no private key data
    // is exported. If no password is passed (as is the case when
    // this implementation is used as browser keystore in various
    // deployment scenarios like Webstart, JFX and applets), create
    // a dummy password so MacOS API is happy.
    if (password == null || password.length == 0) {
      // Must not be a char array with only a 0, as this is an empty
      // string.
      if (random == null) {
        random = new SecureRandom();
      }
      password = Long.toString(random.nextLong()).toCharArray();
    }

    Object entry = entries.get(alias.toLowerCase());

    if (entry == null || !(entry instanceof KeyEntry)) {
      return null;
    }

    // This call gives us a PKCS12 bag, with the key inside it.
    byte[] exportedKeyInfo = _getEncodedKeyData(((KeyEntry) entry).keyRef, password);
    if (exportedKeyInfo == null) {
      return null;
    }

    PrivateKey returnValue = null;

    try {
      byte[] pkcs8KeyData = fetchPrivateKeyFromBag(exportedKeyInfo);
      byte[] encryptedKey;
      AlgorithmParameters algParams;
      ObjectIdentifier algOid;
      try {
        // get the encrypted private key
        EncryptedPrivateKeyInfo encrInfo = new EncryptedPrivateKeyInfo(pkcs8KeyData);
        encryptedKey = encrInfo.getEncryptedData();

        // parse Algorithm parameters
        DerValue val = new DerValue(encrInfo.getAlgorithm().encode());
        DerInputStream in = val.toDerInputStream();
        algOid = in.getOID();
        algParams = parseAlgParameters(in);

      } catch (IOException ioe) {
        UnrecoverableKeyException uke =
            new UnrecoverableKeyException(
                "Private key not stored as " + "PKCS#8 EncryptedPrivateKeyInfo: " + ioe);
        uke.initCause(ioe);
        throw uke;
      }

      // Use JCE to decrypt the data using the supplied password.
      SecretKey skey = getPBEKey(password);
      Cipher cipher = Cipher.getInstance(algOid.toString());
      cipher.init(Cipher.DECRYPT_MODE, skey, algParams);
      byte[] decryptedPrivateKey = cipher.doFinal(encryptedKey);
      PKCS8EncodedKeySpec kspec = new PKCS8EncodedKeySpec(decryptedPrivateKey);

      // Parse the key algorithm and then use a JCA key factory to create the private key.
      DerValue val = new DerValue(decryptedPrivateKey);
      DerInputStream in = val.toDerInputStream();

      // Ignore this -- version should be 0.
      int i = in.getInteger();

      // Get the Algorithm ID next
      DerValue[] value = in.getSequence(2);
      AlgorithmId algId = new AlgorithmId(value[0].getOID());
      String algName = algId.getName();

      // Get a key factory for this algorithm.  It's likely to be 'RSA'.
      KeyFactory kfac = KeyFactory.getInstance(algName);
      returnValue = kfac.generatePrivate(kspec);
    } catch (Exception e) {
      UnrecoverableKeyException uke =
          new UnrecoverableKeyException("Get Key failed: " + e.getMessage());
      uke.initCause(e);
      throw uke;
    }

    return returnValue;
  }