--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/java.base/share/classes/com/sun/crypto/provider/PBES1Core.java Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,535 @@
+/*
+ * Copyright (c) 2002, 2013, 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.
+ *
+ * @author Jan Luehe
+ *
+ *
+ * @see javax.crypto.Cipher
+ */
+final class PBES1Core {
+
+ // the encapsulated DES cipher
+ private CipherCore cipher;
+ private MessageDigest md;
+ private int blkSize;
+ private String algo = null;
+ private byte[] salt = null;
+ private int iCount = 10;
+
+ /**
+ * Creates an instance of PBE Cipher using the specified CipherSpi
+ * instance.
+ *
+ */
+ PBES1Core(String cipherAlg) throws NoSuchAlgorithmException,
+ NoSuchPaddingException {
+ algo = cipherAlg;
+ if (algo.equals("DES")) {
+ cipher = new CipherCore(new DESCrypt(),
+ DESConstants.DES_BLOCK_SIZE);
+ } else if (algo.equals("DESede")) {
+
+ cipher = new CipherCore(new DESedeCrypt(),
+ DESConstants.DES_BLOCK_SIZE);
+ } else {
+ throw new NoSuchAlgorithmException("No Cipher implementation " +
+ "for PBEWithMD5And" + algo);
+ }
+ cipher.setMode("CBC");
+ cipher.setPadding("PKCS5Padding");
+ // get instance of MD5
+ md = MessageDigest.getInstance("MD5");
+ }
+
+ /**
+ * Sets the mode of this cipher. This algorithm can only be run in CBC
+ * mode.
+ *
+ * @param mode the cipher mode
+ *
+ * @exception NoSuchAlgorithmException if the requested cipher mode is
+ * invalid
+ */
+ void setMode(String mode) throws NoSuchAlgorithmException {
+ cipher.setMode(mode);
+ }
+
+ /**
+ * Sets the padding mechanism of this cipher. This algorithm only uses
+ * PKCS #5 padding.
+ *
+ * @param padding the padding mechanism
+ *
+ * @exception NoSuchPaddingException if the requested padding mechanism
+ * is invalid
+ */
+ void setPadding(String paddingScheme) throws NoSuchPaddingException {
+ cipher.setPadding(paddingScheme);
+ }
+
+ /**
+ * Returns the block size (in bytes).
+ *
+ * @return the block size (in bytes)
+ */
+ int getBlockSize() {
+ return DESConstants.DES_BLOCK_SIZE;
+ }
+
+ /**
+ * Returns the length in bytes that an output buffer would need to be in
+ * order to hold the result of the next <code>update</code> or
+ * <code>doFinal</code> operation, given the input length
+ * <code>inputLen</code> (in bytes).
+ *
+ * <p>This call takes into account any unprocessed (buffered) data from a
+ * previous <code>update</code> call, and padding.
+ *
+ * <p>The actual output length of the next <code>update</code> or
+ * <code>doFinal</code> call may be smaller than the length returned by
+ * this method.
+ *
+ * @param inputLen the input length (in bytes)
+ *
+ * @return the required output buffer size (in bytes)
+ *
+ */
+ int getOutputSize(int inputLen) {
+ return cipher.getOutputSize(inputLen);
+ }
+
+ /**
+ * Returns the initialization vector (IV) in a new buffer.
+ *
+ * <p> This is useful in the case where a random IV has been created
+ * (see <a href = "#init">init</a>),
+ * or in the context of password-based encryption or
+ * decryption, where the IV is derived from a user-supplied password.
+ *
+ * @return the initialization vector in a new buffer, or null if the
+ * underlying algorithm does not use an IV, or if the IV has not yet
+ * been set.
+ */
+ byte[] getIV() {
+ return cipher.getIV();
+ }
+
+ /**
+ * Returns the parameters used with this cipher.
+ *
+ * <p>The returned parameters may be the same that were used to initialize
+ * this cipher, or may contain the default set of parameters or a set of
+ * randomly generated parameters used by the underlying cipher
+ * implementation (provided that the underlying cipher implementation
+ * uses a default set of parameters or creates new parameters if it needs
+ * parameters but was not initialized with any).
+ *
+ * @return the parameters used with this cipher, or null if this cipher
+ * does not use any parameters.
+ */
+ AlgorithmParameters getParameters() {
+ AlgorithmParameters params = null;
+ if (salt == null) {
+ salt = new byte[8];
+ SunJCE.getRandom().nextBytes(salt);
+ }
+ PBEParameterSpec pbeSpec = new PBEParameterSpec(salt, iCount);
+ try {
+ params = AlgorithmParameters.getInstance("PBEWithMD5And" +
+ (algo.equalsIgnoreCase("DES")? "DES":"TripleDES"),
+ 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;
+ }
+
+ /**
+ * Initializes this cipher with a key, a set of
+ * algorithm parameters, and a source of randomness.
+ * The cipher is initialized for one of the following four operations:
+ * encryption, decryption, key wrapping or key unwrapping, depending on
+ * the value of <code>opmode</code>.
+ *
+ * <p>If this cipher (including its underlying feedback or padding scheme)
+ * requires any random bytes, it will get them from <code>random</code>.
+ *
+ * @param opmode the operation mode of this cipher (this is one of
+ * the following:
+ * <code>ENCRYPT_MODE</code>, <code>DECRYPT_MODE</code>),
+ * <code>WRAP_MODE</code> or <code>UNWRAP_MODE</code>)
+ * @param key the encryption key
+ * @param params the algorithm parameters
+ * @param random the source of randomness
+ *
+ * @exception InvalidKeyException if the given key is inappropriate for
+ * initializing this cipher
+ * @exception InvalidAlgorithmParameterException if the given algorithm
+ * parameters are inappropriate for this cipher
+ */
+ void init(int opmode, Key key, AlgorithmParameterSpec params,
+ SecureRandom random)
+ throws InvalidKeyException, InvalidAlgorithmParameterException {
+ if (((opmode == Cipher.DECRYPT_MODE) ||
+ (opmode == Cipher.UNWRAP_MODE)) && (params == null)) {
+ throw new InvalidAlgorithmParameterException("Parameters "
+ + "missing");
+ }
+ if ((key == null) ||
+ (key.getEncoded() == null) ||
+ !(key.getAlgorithm().regionMatches(true, 0, "PBE", 0, 3))) {
+ throw new InvalidKeyException("Missing password");
+ }
+
+ if (params == null) {
+ // create random salt and use default iteration count
+ salt = new byte[8];
+ random.nextBytes(salt);
+ } else {
+ if (!(params instanceof PBEParameterSpec)) {
+ throw new InvalidAlgorithmParameterException
+ ("Wrong parameter type: PBE expected");
+ }
+ salt = ((PBEParameterSpec) params).getSalt();
+ // salt must be 8 bytes long (by definition)
+ if (salt.length != 8) {
+ throw new InvalidAlgorithmParameterException
+ ("Salt must be 8 bytes long");
+ }
+ iCount = ((PBEParameterSpec) params).getIterationCount();
+ if (iCount <= 0) {
+ throw new InvalidAlgorithmParameterException
+ ("IterationCount must be a positive number");
+ }
+ }
+
+ byte[] derivedKey = deriveCipherKey(key);
+ // use all but the last 8 bytes as the key value
+ SecretKeySpec cipherKey = new SecretKeySpec(derivedKey, 0,
+ derivedKey.length-8, algo);
+ // use the last 8 bytes as the IV
+ IvParameterSpec ivSpec = new IvParameterSpec(derivedKey,
+ derivedKey.length-8,
+ 8);
+ // initialize the underlying cipher
+ cipher.init(opmode, cipherKey, ivSpec, random);
+ }
+
+ private byte[] deriveCipherKey(Key key) {
+
+ byte[] result = null;
+ byte[] passwdBytes = key.getEncoded();
+
+ if (algo.equals("DES")) {
+ // P || S (password concatenated with salt)
+ byte[] concat = new byte[passwdBytes.length + salt.length];
+ System.arraycopy(passwdBytes, 0, concat, 0, passwdBytes.length);
+ java.util.Arrays.fill(passwdBytes, (byte)0x00);
+ System.arraycopy(salt, 0, concat, passwdBytes.length, salt.length);
+
+ // digest P || S with c iterations
+ byte[] toBeHashed = concat;
+ for (int i = 0; i < iCount; i++) {
+ md.update(toBeHashed);
+ toBeHashed = md.digest(); // this resets the digest
+ }
+ java.util.Arrays.fill(concat, (byte)0x00);
+ result = toBeHashed;
+ } else if (algo.equals("DESede")) {
+ // if the 2 salt halves are the same, invert one of them
+ int i;
+ for (i=0; i<4; i++) {
+ if (salt[i] != salt[i+4])
+ break;
+ }
+ if (i==4) { // same, invert 1st half
+ for (i=0; i<2; i++) {
+ byte tmp = salt[i];
+ salt[i] = salt[3-i];
+ salt[3-1] = tmp;
+ }
+ }
+
+ // Now digest each half (concatenated with password). For each
+ // half, go through the loop as many times as specified by the
+ // iteration count parameter (inner for loop).
+ // Concatenate the output from each digest round with the
+ // password, and use the result as the input to the next digest
+ // operation.
+ byte[] kBytes = null;
+ IvParameterSpec iv = null;
+ byte[] toBeHashed = null;
+ result = new byte[DESedeKeySpec.DES_EDE_KEY_LEN +
+ DESConstants.DES_BLOCK_SIZE];
+ for (i = 0; i < 2; i++) {
+ toBeHashed = new byte[salt.length/2];
+ System.arraycopy(salt, i*(salt.length/2), toBeHashed, 0,
+ toBeHashed.length);
+ for (int j=0; j < iCount; j++) {
+ md.update(toBeHashed);
+ md.update(passwdBytes);
+ toBeHashed = md.digest(); // this resets the digest
+ }
+ System.arraycopy(toBeHashed, 0, result, i*16,
+ toBeHashed.length);
+ }
+ }
+ return result;
+ }
+
+ void init(int opmode, Key key, AlgorithmParameters params,
+ SecureRandom random)
+ throws InvalidKeyException, InvalidAlgorithmParameterException {
+ PBEParameterSpec pbeSpec = null;
+ if (params != null) {
+ try {
+ pbeSpec = params.getParameterSpec(PBEParameterSpec.class);
+ } catch (InvalidParameterSpecException ipse) {
+ throw new InvalidAlgorithmParameterException("Wrong parameter "
+ + "type: PBE "
+ + "expected");
+ }
+ }
+ init(opmode, key, pbeSpec, random);
+ }
+
+ /**
+ * Continues a multiple-part encryption or decryption operation
+ * (depending on how this cipher was initialized), processing another data
+ * part.
+ *
+ * <p>The first <code>inputLen</code> bytes in the <code>input</code>
+ * buffer, starting at <code>inputOffset</code>, are processed, and the
+ * result is stored in a new buffer.
+ *
+ * @param input the input buffer
+ * @param inputOffset the offset in <code>input</code> where the input
+ * starts
+ * @param inputLen the input length
+ *
+ * @return the new buffer with the result
+ *
+ */
+ byte[] update(byte[] input, int inputOffset, int inputLen) {
+ return cipher.update(input, inputOffset, inputLen);
+ }
+
+ /**
+ * Continues a multiple-part encryption or decryption operation
+ * (depending on how this cipher was initialized), processing another data
+ * part.
+ *
+ * <p>The first <code>inputLen</code> bytes in the <code>input</code>
+ * buffer, starting at <code>inputOffset</code>, are processed, and the
+ * result is stored in the <code>output</code> buffer, starting at
+ * <code>outputOffset</code>.
+ *
+ * @param input the input buffer
+ * @param inputOffset the offset in <code>input</code> where the input
+ * starts
+ * @param inputLen the input length
+ * @param output the buffer for the result
+ * @param outputOffset the offset in <code>output</code> where the result
+ * is stored
+ *
+ * @return the number of bytes stored in <code>output</code>
+ *
+ * @exception ShortBufferException if the given output buffer is too small
+ * to hold the result
+ */
+ int update(byte[] input, int inputOffset, int inputLen,
+ byte[] output, int outputOffset)
+ throws ShortBufferException {
+ return cipher.update(input, inputOffset, inputLen,
+ output, outputOffset);
+ }
+
+ /**
+ * Encrypts or decrypts data in a single-part operation,
+ * or finishes a multiple-part operation.
+ * The data is encrypted or decrypted, depending on how this cipher was
+ * initialized.
+ *
+ * <p>The first <code>inputLen</code> bytes in the <code>input</code>
+ * buffer, starting at <code>inputOffset</code>, and any input bytes that
+ * may have been buffered during a previous <code>update</code> operation,
+ * are processed, with padding (if requested) being applied.
+ * The result is stored in a new buffer.
+ *
+ * <p>The cipher is reset to its initial state (uninitialized) after this
+ * call.
+ *
+ * @param input the input buffer
+ * @param inputOffset the offset in <code>input</code> where the input
+ * starts
+ * @param inputLen the input length
+ *
+ * @return the new buffer with the result
+ *
+ * @exception IllegalBlockSizeException if this cipher is a block cipher,
+ * no padding has been requested (only in encryption mode), and the total
+ * input length of the data processed by this cipher is not a multiple of
+ * block size
+ * @exception BadPaddingException if decrypting and padding is chosen,
+ * but the last input data does not have proper padding bytes.
+ */
+ byte[] doFinal(byte[] input, int inputOffset, int inputLen)
+ throws IllegalBlockSizeException, BadPaddingException {
+ return cipher.doFinal(input, inputOffset, inputLen);
+ }
+
+ /**
+ * Encrypts or decrypts data in a single-part operation,
+ * or finishes a multiple-part operation.
+ * The data is encrypted or decrypted, depending on how this cipher was
+ * initialized.
+ *
+ * <p>The first <code>inputLen</code> bytes in the <code>input</code>
+ * buffer, starting at <code>inputOffset</code>, and any input bytes that
+ * may have been buffered during a previous <code>update</code> operation,
+ * are processed, with padding (if requested) being applied.
+ * The result is stored in the <code>output</code> buffer, starting at
+ * <code>outputOffset</code>.
+ *
+ * <p>The cipher is reset to its initial state (uninitialized) after this
+ * call.
+ *
+ * @param input the input buffer
+ * @param inputOffset the offset in <code>input</code> where the input
+ * starts
+ * @param inputLen the input length
+ * @param output the buffer for the result
+ * @param outputOffset the offset in <code>output</code> where the result
+ * is stored
+ *
+ * @return the number of bytes stored in <code>output</code>
+ *
+ * @exception IllegalBlockSizeException if this cipher is a block cipher,
+ * no padding has been requested (only in encryption mode), and the total
+ * input length of the data processed by this cipher is not a multiple of
+ * block size
+ * @exception ShortBufferException if the given output buffer is too small
+ * to hold the result
+ * @exception BadPaddingException if decrypting and padding is chosen,
+ * but the last input data does not have proper padding bytes.
+ */
+ int doFinal(byte[] input, int inputOffset, int inputLen,
+ byte[] output, int outputOffset)
+ throws ShortBufferException, IllegalBlockSizeException,
+ BadPaddingException {
+ return cipher.doFinal(input, inputOffset, inputLen,
+ output, outputOffset);
+ }
+
+ /**
+ * Wrap a key.
+ *
+ * @param key the key to be wrapped.
+ *
+ * @return the wrapped key.
+ *
+ * @exception IllegalBlockSizeException if this cipher is a block
+ * cipher, no padding has been requested, and the length of the
+ * encoding of the key to be wrapped is not a
+ * multiple of the block size.
+ *
+ * @exception InvalidKeyException if it is impossible or unsafe to
+ * wrap the key with this cipher (e.g., a hardware protected key is
+ * being passed to a software only cipher).
+ */
+ byte[] wrap(Key key)
+ throws IllegalBlockSizeException, InvalidKeyException {
+ byte[] result = null;
+
+ try {
+ byte[] encodedKey = key.getEncoded();
+ if ((encodedKey == null) || (encodedKey.length == 0)) {
+ throw new InvalidKeyException("Cannot get an encoding of " +
+ "the key to be wrapped");
+ }
+
+ result = doFinal(encodedKey, 0, encodedKey.length);
+ } catch (BadPaddingException e) {
+ // Should never happen
+ }
+
+ return result;
+ }
+
+ /**
+ * Unwrap a previously wrapped key.
+ *
+ * @param wrappedKey the key to be unwrapped.
+ *
+ * @param wrappedKeyAlgorithm the algorithm the wrapped key is for.
+ *
+ * @param wrappedKeyType the type of the wrapped key.
+ * This is one of <code>Cipher.SECRET_KEY</code>,
+ * <code>Cipher.PRIVATE_KEY</code>, or <code>Cipher.PUBLIC_KEY</code>.
+ *
+ * @return the unwrapped key.
+ *
+ * @exception NoSuchAlgorithmException if no installed providers
+ * can create keys of type <code>wrappedKeyType</code> for the
+ * <code>wrappedKeyAlgorithm</code>.
+ *
+ * @exception InvalidKeyException if <code>wrappedKey</code> does not
+ * represent a wrapped key of type <code>wrappedKeyType</code> for
+ * the <code>wrappedKeyAlgorithm</code>.
+ */
+ Key unwrap(byte[] wrappedKey,
+ String wrappedKeyAlgorithm,
+ int wrappedKeyType)
+ throws InvalidKeyException, NoSuchAlgorithmException {
+ byte[] encodedKey;
+ try {
+ encodedKey = doFinal(wrappedKey, 0, wrappedKey.length);
+ } catch (BadPaddingException ePadding) {
+ throw new InvalidKeyException("The wrapped key is not padded " +
+ "correctly");
+ } catch (IllegalBlockSizeException eBlockSize) {
+ throw new InvalidKeyException("The wrapped key does not have " +
+ "the correct length");
+ }
+ return ConstructKeys.constructKey(encodedKey, wrappedKeyAlgorithm,
+ wrappedKeyType);
+ }
+}