| /* |
| * Copyright (c) 2012, 2015, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package com.sun.crypto.provider; |
| |
| import java.security.*; |
| import java.security.spec.*; |
| import javax.crypto.*; |
| import javax.crypto.spec.*; |
| |
| /** |
| * This class represents password-based encryption as defined by the PKCS #5 |
| * standard. |
| * These algorithms implement PBE with HmacSHA1/HmacSHA2-family and AES-CBC. |
| * Padding is done as described in PKCS #5. |
| * |
| * @author Jan Luehe |
| * |
| * |
| * @see javax.crypto.Cipher |
| */ |
| abstract class PBES2Core extends CipherSpi { |
| |
| private static final int DEFAULT_SALT_LENGTH = 20; |
| private static final int DEFAULT_COUNT = 4096; |
| |
| // the encapsulated cipher |
| private final CipherCore cipher; |
| private final int keyLength; // in bits |
| private final int blkSize; // in bits |
| private final PBKDF2Core kdf; |
| private final String pbeAlgo; |
| private final String cipherAlgo; |
| private int iCount = DEFAULT_COUNT; |
| private byte[] salt = null; |
| private IvParameterSpec ivSpec = null; |
| |
| /** |
| * Creates an instance of PBE Scheme 2 according to the selected |
| * password-based key derivation function and encryption scheme. |
| */ |
| PBES2Core(String kdfAlgo, String cipherAlgo, int keySize) |
| throws NoSuchAlgorithmException, NoSuchPaddingException { |
| |
| this.cipherAlgo = cipherAlgo; |
| keyLength = keySize * 8; |
| pbeAlgo = "PBEWith" + kdfAlgo + "And" + cipherAlgo + "_" + keyLength; |
| |
| if (cipherAlgo.equals("AES")) { |
| blkSize = AESConstants.AES_BLOCK_SIZE; |
| cipher = new CipherCore(new AESCrypt(), blkSize); |
| |
| switch(kdfAlgo) { |
| case "HmacSHA1": |
| kdf = new PBKDF2Core.HmacSHA1(); |
| break; |
| case "HmacSHA224": |
| kdf = new PBKDF2Core.HmacSHA224(); |
| break; |
| case "HmacSHA256": |
| kdf = new PBKDF2Core.HmacSHA256(); |
| break; |
| case "HmacSHA384": |
| kdf = new PBKDF2Core.HmacSHA384(); |
| break; |
| case "HmacSHA512": |
| kdf = new PBKDF2Core.HmacSHA512(); |
| break; |
| default: |
| throw new NoSuchAlgorithmException( |
| "No Cipher implementation for " + kdfAlgo); |
| } |
| } else { |
| throw new NoSuchAlgorithmException("No Cipher implementation for " + |
| pbeAlgo); |
| } |
| cipher.setMode("CBC"); |
| cipher.setPadding("PKCS5Padding"); |
| } |
| |
| protected void engineSetMode(String mode) throws NoSuchAlgorithmException { |
| if ((mode != null) && (!mode.equalsIgnoreCase("CBC"))) { |
| throw new NoSuchAlgorithmException("Invalid cipher mode: " + mode); |
| } |
| } |
| |
| protected void engineSetPadding(String paddingScheme) |
| throws NoSuchPaddingException { |
| if ((paddingScheme != null) && |
| (!paddingScheme.equalsIgnoreCase("PKCS5Padding"))) { |
| throw new NoSuchPaddingException("Invalid padding scheme: " + |
| paddingScheme); |
| } |
| } |
| |
| protected int engineGetBlockSize() { |
| return blkSize; |
| } |
| |
| protected int engineGetOutputSize(int inputLen) { |
| return cipher.getOutputSize(inputLen); |
| } |
| |
| protected byte[] engineGetIV() { |
| return cipher.getIV(); |
| } |
| |
| protected AlgorithmParameters engineGetParameters() { |
| AlgorithmParameters params = null; |
| if (salt == null) { |
| // generate random salt and use default iteration count |
| salt = new byte[DEFAULT_SALT_LENGTH]; |
| SunJCE.getRandom().nextBytes(salt); |
| iCount = DEFAULT_COUNT; |
| } |
| if (ivSpec == null) { |
| // generate random IV |
| byte[] ivBytes = new byte[blkSize]; |
| SunJCE.getRandom().nextBytes(ivBytes); |
| ivSpec = new IvParameterSpec(ivBytes); |
| } |
| PBEParameterSpec pbeSpec = new PBEParameterSpec(salt, iCount, ivSpec); |
| try { |
| params = AlgorithmParameters.getInstance(pbeAlgo, |
| SunJCE.getInstance()); |
| params.init(pbeSpec); |
| } catch (NoSuchAlgorithmException nsae) { |
| // should never happen |
| throw new RuntimeException("SunJCE called, but not configured"); |
| } catch (InvalidParameterSpecException ipse) { |
| // should never happen |
| throw new RuntimeException("PBEParameterSpec not supported"); |
| } |
| return params; |
| } |
| |
| protected void engineInit(int opmode, Key key, SecureRandom random) |
| throws InvalidKeyException { |
| try { |
| engineInit(opmode, key, (AlgorithmParameterSpec) null, random); |
| } catch (InvalidAlgorithmParameterException ie) { |
| InvalidKeyException ike = |
| new InvalidKeyException("requires PBE parameters"); |
| ike.initCause(ie); |
| throw ike; |
| } |
| } |
| |
| protected void engineInit(int opmode, Key key, |
| AlgorithmParameterSpec params, |
| SecureRandom random) |
| throws InvalidKeyException, InvalidAlgorithmParameterException { |
| |
| if ((key == null) || |
| (key.getEncoded() == null) || |
| !(key.getAlgorithm().regionMatches(true, 0, "PBE", 0, 3))) { |
| throw new InvalidKeyException("Missing password"); |
| } |
| |
| // TBD: consolidate the salt, ic and IV parameter checks below |
| |
| // Extract salt and iteration count from the key, if present |
| if (key instanceof javax.crypto.interfaces.PBEKey) { |
| salt = ((javax.crypto.interfaces.PBEKey)key).getSalt(); |
| if (salt != null && salt.length < 8) { |
| throw new InvalidAlgorithmParameterException( |
| "Salt must be at least 8 bytes long"); |
| } |
| iCount = ((javax.crypto.interfaces.PBEKey)key).getIterationCount(); |
| if (iCount == 0) { |
| iCount = DEFAULT_COUNT; |
| } else if (iCount < 0) { |
| throw new InvalidAlgorithmParameterException( |
| "Iteration count must be a positive number"); |
| } |
| } |
| |
| // Extract salt, iteration count and IV from the params, if present |
| if (params == null) { |
| if (salt == null) { |
| // generate random salt and use default iteration count |
| salt = new byte[DEFAULT_SALT_LENGTH]; |
| random.nextBytes(salt); |
| iCount = DEFAULT_COUNT; |
| } |
| if ((opmode == Cipher.ENCRYPT_MODE) || |
| (opmode == Cipher.WRAP_MODE)) { |
| // generate random IV |
| byte[] ivBytes = new byte[blkSize]; |
| random.nextBytes(ivBytes); |
| ivSpec = new IvParameterSpec(ivBytes); |
| } |
| } else { |
| if (!(params instanceof PBEParameterSpec)) { |
| throw new InvalidAlgorithmParameterException |
| ("Wrong parameter type: PBE expected"); |
| } |
| // salt and iteration count from the params take precedence |
| byte[] specSalt = ((PBEParameterSpec) params).getSalt(); |
| if (specSalt != null && specSalt.length < 8) { |
| throw new InvalidAlgorithmParameterException( |
| "Salt must be at least 8 bytes long"); |
| } |
| salt = specSalt; |
| int specICount = ((PBEParameterSpec) params).getIterationCount(); |
| if (specICount == 0) { |
| specICount = DEFAULT_COUNT; |
| } else if (specICount < 0) { |
| throw new InvalidAlgorithmParameterException( |
| "Iteration count must be a positive number"); |
| } |
| iCount = specICount; |
| |
| AlgorithmParameterSpec specParams = |
| ((PBEParameterSpec) params).getParameterSpec(); |
| if (specParams != null) { |
| if (specParams instanceof IvParameterSpec) { |
| ivSpec = (IvParameterSpec)specParams; |
| } else { |
| throw new InvalidAlgorithmParameterException( |
| "Wrong parameter type: IV expected"); |
| } |
| } else if ((opmode == Cipher.ENCRYPT_MODE) || |
| (opmode == Cipher.WRAP_MODE)) { |
| // generate random IV |
| byte[] ivBytes = new byte[blkSize]; |
| random.nextBytes(ivBytes); |
| ivSpec = new IvParameterSpec(ivBytes); |
| } else { |
| throw new InvalidAlgorithmParameterException( |
| "Missing parameter type: IV expected"); |
| } |
| } |
| |
| SecretKeySpec cipherKey = null; |
| byte[] derivedKey = null; |
| byte[] passwdBytes = key.getEncoded(); |
| char[] passwdChars = new char[passwdBytes.length]; |
| |
| for (int i=0; i<passwdChars.length; i++) |
| passwdChars[i] = (char) (passwdBytes[i] & 0x7f); |
| |
| PBEKeySpec pbeSpec = |
| new PBEKeySpec(passwdChars, salt, iCount, keyLength); |
| // password char[] was cloned in PBEKeySpec constructor, |
| // so we can zero it out here |
| java.util.Arrays.fill(passwdChars, ' '); |
| java.util.Arrays.fill(passwdBytes, (byte)0x00); |
| |
| SecretKey s = null; |
| |
| try { |
| s = kdf.engineGenerateSecret(pbeSpec); |
| |
| } catch (InvalidKeySpecException ikse) { |
| InvalidKeyException ike = |
| new InvalidKeyException("Cannot construct PBE key"); |
| ike.initCause(ikse); |
| throw ike; |
| } |
| derivedKey = s.getEncoded(); |
| cipherKey = new SecretKeySpec(derivedKey, cipherAlgo); |
| |
| // initialize the underlying cipher |
| cipher.init(opmode, cipherKey, ivSpec, random); |
| } |
| |
| protected void engineInit(int opmode, Key key, AlgorithmParameters params, |
| SecureRandom random) |
| throws InvalidKeyException, InvalidAlgorithmParameterException { |
| AlgorithmParameterSpec pbeSpec = null; |
| if (params != null) { |
| try { |
| pbeSpec = params.getParameterSpec(PBEParameterSpec.class); |
| } catch (InvalidParameterSpecException ipse) { |
| throw new InvalidAlgorithmParameterException( |
| "Wrong parameter type: PBE expected"); |
| } |
| } |
| engineInit(opmode, key, pbeSpec, random); |
| } |
| |
| protected byte[] engineUpdate(byte[] input, int inputOffset, int inputLen) { |
| return cipher.update(input, inputOffset, inputLen); |
| } |
| |
| protected int engineUpdate(byte[] input, int inputOffset, int inputLen, |
| byte[] output, int outputOffset) |
| throws ShortBufferException { |
| return cipher.update(input, inputOffset, inputLen, |
| output, outputOffset); |
| } |
| |
| protected byte[] engineDoFinal(byte[] input, int inputOffset, int inputLen) |
| throws IllegalBlockSizeException, BadPaddingException { |
| return cipher.doFinal(input, inputOffset, inputLen); |
| } |
| |
| protected int engineDoFinal(byte[] input, int inputOffset, int inputLen, |
| byte[] output, int outputOffset) |
| throws ShortBufferException, IllegalBlockSizeException, |
| BadPaddingException { |
| return cipher.doFinal(input, inputOffset, inputLen, |
| output, outputOffset); |
| } |
| |
| protected int engineGetKeySize(Key key) throws InvalidKeyException { |
| return keyLength; |
| } |
| |
| protected byte[] engineWrap(Key key) |
| throws IllegalBlockSizeException, InvalidKeyException { |
| return cipher.wrap(key); |
| } |
| |
| protected Key engineUnwrap(byte[] wrappedKey, String wrappedKeyAlgorithm, |
| int wrappedKeyType) |
| throws InvalidKeyException, NoSuchAlgorithmException { |
| byte[] encodedKey; |
| return cipher.unwrap(wrappedKey, wrappedKeyAlgorithm, |
| wrappedKeyType); |
| } |
| |
| public static final class HmacSHA1AndAES_128 extends PBES2Core { |
| public HmacSHA1AndAES_128() |
| throws NoSuchAlgorithmException, NoSuchPaddingException { |
| super("HmacSHA1", "AES", 16); |
| } |
| } |
| |
| public static final class HmacSHA224AndAES_128 extends PBES2Core { |
| public HmacSHA224AndAES_128() |
| throws NoSuchAlgorithmException, NoSuchPaddingException { |
| super("HmacSHA224", "AES", 16); |
| } |
| } |
| |
| public static final class HmacSHA256AndAES_128 extends PBES2Core { |
| public HmacSHA256AndAES_128() |
| throws NoSuchAlgorithmException, NoSuchPaddingException { |
| super("HmacSHA256", "AES", 16); |
| } |
| } |
| |
| public static final class HmacSHA384AndAES_128 extends PBES2Core { |
| public HmacSHA384AndAES_128() |
| throws NoSuchAlgorithmException, NoSuchPaddingException { |
| super("HmacSHA384", "AES", 16); |
| } |
| } |
| |
| public static final class HmacSHA512AndAES_128 extends PBES2Core { |
| public HmacSHA512AndAES_128() |
| throws NoSuchAlgorithmException, NoSuchPaddingException { |
| super("HmacSHA512", "AES", 16); |
| } |
| } |
| |
| public static final class HmacSHA1AndAES_256 extends PBES2Core { |
| public HmacSHA1AndAES_256() |
| throws NoSuchAlgorithmException, NoSuchPaddingException { |
| super("HmacSHA1", "AES", 32); |
| } |
| } |
| |
| public static final class HmacSHA224AndAES_256 extends PBES2Core { |
| public HmacSHA224AndAES_256() |
| throws NoSuchAlgorithmException, NoSuchPaddingException { |
| super("HmacSHA224", "AES", 32); |
| } |
| } |
| |
| public static final class HmacSHA256AndAES_256 extends PBES2Core { |
| public HmacSHA256AndAES_256() |
| throws NoSuchAlgorithmException, NoSuchPaddingException { |
| super("HmacSHA256", "AES", 32); |
| } |
| } |
| |
| public static final class HmacSHA384AndAES_256 extends PBES2Core { |
| public HmacSHA384AndAES_256() |
| throws NoSuchAlgorithmException, NoSuchPaddingException { |
| super("HmacSHA384", "AES", 32); |
| } |
| } |
| |
| public static final class HmacSHA512AndAES_256 extends PBES2Core { |
| public HmacSHA512AndAES_256() |
| throws NoSuchAlgorithmException, NoSuchPaddingException { |
| super("HmacSHA512", "AES", 32); |
| } |
| } |
| } |