/*
* Copyright (C) 2000 - 2014 TagServlet Ltd
*
* This file is part of Open BlueDragon (OpenBD) CFML Server Engine.
*
* OpenBD is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* Free Software Foundation,version 3.
*
* OpenBD 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 for more details.
*
* You should have received a copy of the GNU General Public License
* along with OpenBD. If not, see http://www.gnu.org/licenses/
*
* Additional permission under GNU GPL version 3 section 7
*
* If you modify this Program, or any covered work, by linking or combining
* it with any of the JARS listed in the README.txt (or a modified version of
* (that library), containing parts covered by the terms of that JAR, the
* licensors of this Program grant you additional permission to convey the
* resulting work.
* README.txt @ http://www.openbluedragon.org/license/README.txt
*
* http://www.openbd.org/
* $Id: decrypt.java 2461 2014-12-17 11:48:57Z alan $
*/
package com.naryx.tagfusion.expression.function;
import java.util.List;
import com.nary.security.Cryptography;
import com.naryx.tagfusion.cfm.engine.cfCatchData;
import com.naryx.tagfusion.cfm.engine.cfData;
import com.naryx.tagfusion.cfm.engine.cfSession;
import com.naryx.tagfusion.cfm.engine.cfStringData;
import com.naryx.tagfusion.cfm.engine.cfmRunTimeException;
public class decrypt extends encrypt {
private static final long serialVersionUID = 1L;
public java.util.Map<String,String> getInfo() {
return makeInfo(
"security",
"Decrypts the given string with the optional parameters",
ReturnType.STRING );
}
public String[] getParamInfo() {
return new String[] {
"string to decrypt",
"encryption key",
"encryption algorithm to be applied. If not specified, a default of BD_DEFAULT will be used. The CFMX_COMPAT algorithm option is not supported.",
"the encoding - uu (default), hex or base64 are valid options",
"the salt to be applied in encryption",
"the number of iterations"
};
}
public cfData execute( cfSession _session, List<cfData> parameters ) throws cfmRunTimeException {
// parameters - string, key[, algorithm[, encoding[, IVorSalt[,
// iterations]]]]
String data = parameters.get( parameters.size() - 1 ).getString();
String key = parameters.get( parameters.size() - 2 ).getString();
String fullAlgorithm = getAlgorithm( _session, parameters );
if ( fullAlgorithm.equalsIgnoreCase( "BD_DEFAULT" ) ) {
try {
return new cfStringData( com.nary.security.encrypter.decrypt( data, key ) );
} catch ( Exception e ) {
cfCatchData catchData = new cfCatchData( _session );
catchData.setType( "Add instance" );
catchData.setDetail( "Decrypt" );
catchData.setMessage( "Decryption failed. Is the String encrypted?; " + e );
throw new cfmRunTimeException( catchData );
}
} else if ( fullAlgorithm.equalsIgnoreCase( "BDNET62_COMPAT" ) ) {
try {
return new cfStringData( com.nary.security.encrypter.decrypt( data, key ) );
} catch ( Exception e ) {
cfCatchData catchData = new cfCatchData( _session );
catchData.setType( "Add instance" );
catchData.setDetail( "Decrypt" );
catchData.setMessage( "Decryption failed. Is the String encrypted?; " + e );
throw new cfmRunTimeException( catchData );
}
}
String encoding = getEncoding( _session, parameters );
byte[] ivOrSalt = getIvOrSalt( _session, parameters, 4 );
int iterations = getIterations( _session, parameters, 5 );
try {
byte[] decrypted = Cryptography.doCipher( Cryptography.DECRYPT_MODE, BinaryDecode.decode( _session, encoding, data ), fullAlgorithm, key.getBytes(), ivOrSalt, iterations );
return new cfStringData( new String( decrypted ) );
} catch ( Exception e ) {
throwException( _session, e.getMessage() );
return null; // keep compiler happy
}
}
}