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/*******************************************************************************
* Copyright (c) 2008 IBM Corporation and others.
*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.equinox.internal.security.storage;
import org.eclipse.equinox.internal.security.auth.nls.SecAuthMessages;
import org.eclipse.equinox.security.storage.StorageException;
public class CryptoData {
static final private char MODULE_ID_SEPARATOR = '\t'; // must not be a valid Base64 char
/**
* Separates salt from the data; this must not be a valid Base64 character.
*/
static private final char SALT_SEPARATOR = ',';
final private String moduleID;
final private byte[] salt;
final private byte[] encryptedData;
public CryptoData(String moduleID, byte[] salt, byte[] data) {
this.moduleID = moduleID;
this.salt = salt;
this.encryptedData = data;
}
public String getModuleID() {
return moduleID;
}
public byte[] getSalt() {
return salt;
}
public byte[] getData() {
return encryptedData;
}
public CryptoData(String data) throws StorageException {
// separate moduleID
int pos = data.indexOf(MODULE_ID_SEPARATOR);
String encrypted;
if (pos == -1) { // invalid data format
throw new StorageException(StorageException.DECRYPTION_ERROR, SecAuthMessages.invalidEntryFormat);
} else if (pos == 0) {
moduleID = null;
encrypted = data.substring(1);
} else {
moduleID = data.substring(0, pos);
encrypted = data.substring(pos + 1);
}
// separate salt and data
int saltPos = encrypted.indexOf(SALT_SEPARATOR);
if (saltPos != -1) {
salt = Base64.decode(encrypted.substring(0, saltPos));
encryptedData = Base64.decode(encrypted.substring(saltPos + 1));
} else { // this is a "null" value
if (encrypted.length() != 0) // double check that this is not a broken entry
throw new StorageException(StorageException.DECRYPTION_ERROR, SecAuthMessages.invalidEntryFormat);
salt = null;
encryptedData = null;
}
}
public String toString() {
StringBuffer encryptedText = (moduleID == null) ? new StringBuffer() : new StringBuffer(moduleID);
encryptedText.append(MODULE_ID_SEPARATOR);
if (salt != null)
encryptedText.append(Base64.encode(salt));
if (encryptedData != null) {
encryptedText.append(SALT_SEPARATOR);
encryptedText.append(Base64.encode(encryptedData));
}
return encryptedText.toString();
}
}
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