/* Copyright (c) 2001-2009, The HSQL Development Group
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* Neither the name of the HSQL Development Group nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL HSQL DEVELOPMENT GROUP, HSQLDB.ORG,
* OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package org.hsqldb.persist;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.security.NoSuchProviderException;
import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.CipherInputStream;
import javax.crypto.CipherOutputStream;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.KeyGenerator;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.SecretKey;
import javax.crypto.ShortBufferException;
import javax.crypto.spec.SecretKeySpec;
import org.hsqldb.error.Error;
import org.hsqldb.error.ErrorCode;
import org.hsqldb.lib.StringConverter;
public class Crypto {
SecretKeySpec key;
Cipher outCipher;
Cipher inCipher;
public Crypto(String keyString, String cipherName, String provider) {
try {
byte[] encodedKey =
StringConverter.hexStringToByteArray(keyString);
key = new SecretKeySpec(encodedKey, cipherName);
outCipher = provider == null ? Cipher.getInstance(cipherName)
: Cipher.getInstance(cipherName,
provider);
outCipher.init(Cipher.ENCRYPT_MODE, key);
inCipher = provider == null ? Cipher.getInstance(cipherName)
: Cipher.getInstance(cipherName,
provider);
inCipher.init(Cipher.DECRYPT_MODE, key);
return;
} catch (NoSuchPaddingException e) {
throw Error.error(ErrorCode.X_S0531, e);
} catch (NoSuchAlgorithmException e) {
throw Error.error(ErrorCode.X_S0531, e);
} catch (InvalidKeyException e) {
throw Error.error(ErrorCode.X_S0531, e);
} catch (NoSuchProviderException e) {
throw Error.error(ErrorCode.X_S0531, e);
} catch (IOException e) {
throw Error.error(ErrorCode.X_S0531, e);
}
}
public synchronized InputStream getInputStream(InputStream in) {
if (inCipher == null) {
return in;
}
try {
inCipher.init(Cipher.DECRYPT_MODE, key);
return new CipherInputStream(in, inCipher);
} catch (java.security.InvalidKeyException e) {
throw Error.error(ErrorCode.X_S0531, e);
}
}
public synchronized OutputStream getOutputStream(OutputStream out) {
if (outCipher == null) {
return out;
}
try {
outCipher.init(Cipher.ENCRYPT_MODE, key);
return new CipherOutputStream(out, outCipher);
} catch (java.security.InvalidKeyException e) {
throw Error.error(ErrorCode.X_S0531, e);
}
}
public synchronized int decode(byte[] source, int sourceOffset,
int length, byte[] dest, int destOffset) {
if (inCipher == null) {
return length;
}
try {
inCipher.init(Cipher.DECRYPT_MODE, key);
return inCipher.doFinal(source, sourceOffset, length, dest,
destOffset);
} catch (java.security.InvalidKeyException e) {
throw Error.error(ErrorCode.X_S0531, e);
} catch (BadPaddingException e) {
throw Error.error(ErrorCode.X_S0531, e);
} catch (IllegalBlockSizeException e) {
throw Error.error(ErrorCode.X_S0531, e);
} catch (ShortBufferException e) {
throw Error.error(ErrorCode.X_S0531, e);
}
}
public synchronized int encode(byte[] source, int sourceOffset,
int length, byte[] dest, int destOffset) {
if (outCipher == null) {
return length;
}
try {
outCipher.init(Cipher.ENCRYPT_MODE, key);
return outCipher.doFinal(source, sourceOffset, length, dest,
destOffset);
} catch (java.security.InvalidKeyException e) {
throw Error.error(ErrorCode.X_S0531, e);
} catch (BadPaddingException e) {
throw Error.error(ErrorCode.X_S0531, e);
} catch (IllegalBlockSizeException e) {
throw Error.error(ErrorCode.X_S0531, e);
} catch (ShortBufferException e) {
throw Error.error(ErrorCode.X_S0531, e);
}
}
public static byte[] getNewKey(String cipherName, String provider) {
try {
KeyGenerator generator = provider == null
? KeyGenerator.getInstance(cipherName)
: KeyGenerator.getInstance(cipherName,
provider);
SecretKey key = generator.generateKey();
byte[] raw = key.getEncoded();
return raw;
} catch (java.security.NoSuchAlgorithmException e) {
throw Error.error(ErrorCode.X_S0531, e);
} catch (NoSuchProviderException e) {
throw Error.error(ErrorCode.X_S0531, e);
}
}
public synchronized int getEncodedSize(int size) {
try {
return outCipher.getOutputSize(size);
} catch (IllegalStateException ex) {
try {
outCipher.init(Cipher.ENCRYPT_MODE, key);
return outCipher.getOutputSize(size);
} catch (java.security.InvalidKeyException e) {
throw Error.error(ErrorCode.X_S0531, e);
}
}
}
}