/*
*
*
* Copyright 1990-2007 Sun Microsystems, Inc. All Rights Reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
*
* This program 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.
*
* This program 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 at /legal/license.txt).
*
* 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 Sun Microsystems, Inc., 4150 Network Circle, Santa
* Clara, CA 95054 or visit www.sun.com if you need additional
* information or have any questions.
*/
package com.sun.satsa.acl;
import com.sun.satsa.util.Utils;
import java.io.IOException;
/**
* This class represents PKCS#15 PIN attributes.
*/
public class PINAttributes {
/** PIN type constant. */
private static final int TYPE_BCD = 0;
/** PIN type constant. */
private static final int TYPE_ASCII = 1;
/** PIN type constant. */
private static final int TYPE_UTF = 2;
/** PIN type constant. */
private static final int TYPE_HN = 3;
/** PIN type constant. */
private static final int TYPE_ISO = 4;
/** PIN flag constant. */
public static final int FLAG_CASE_SENSITIVE = 1;
/** PIN flag constant. */
public static final int FLAG_CHANGE_DISABLED = 2;
/** PIN flag constant. */
public static final int FLAG_UNBLOCK_DISABLED = 4;
/** PIN flag constant. */
public static final int FLAG_NEEDS_PADDING = 8;
/** PIN flag constant. */
public static final int FLAG_DISABLE_ALLOWED = 16;
/** PIN flag constant. */
public static final int FLAG_UNBLOCKING_PIN = 32;
/** PIN label. */
public String label;
/** PIN identifier. */
public int id;
/** pinType PIN attribute. */
public int pinType;
/** minLength PIN attribute. */
public int minLength;
/** storedLength PIN attribute. */
public int storedLength;
/** maxLength PIN attribute. */
public int maxLength;
/** pinReference PIN attribute. */
public int pinReference;
/** padChar PIN attribute. */
public int padChar;
/** pinFlags PIN attribute. */
public int pinFlags;
/** Path PIN attribute. */
public short[] path;
/**
* Constructs PINAttributes object.
*/
public PINAttributes() {}
/**
* Constructs PINAttributes object.
* @param r reader for permissions file.
* @throws java.io.IOException if I/O error occurs.
*/
PINAttributes(ACLFileReader r) throws IOException {
r.checkWord("{");
while (true) {
String s = r.readWord();
if (s.equals("}")) {
break;
}
if (s.equals("label")) {
label = r.readLine();
continue;
}
if (s.equals("id")) {
id = r.readByte();
continue;
}
String h = r.readWord();
if (s.equals("type")) {
if (h.equals("bcd")) {
pinType = TYPE_BCD;
} else
if (h.equals("ascii")) {
pinType = TYPE_ASCII;
} else
if (h.equals("utf")) {
pinType = TYPE_UTF;
} else
if (h.equals("half-nibble")) {
pinType = TYPE_HN;
} else
if (h.equals("iso")) {
pinType = TYPE_ISO;
} else {
throw new IOException();
}
continue;
}
if (s.equals("min")) {
minLength = Integer.parseInt(h, 16);
continue;
}
if (s.equals("stored")) {
storedLength = Integer.parseInt(h, 16);
continue;
}
if (s.equals("max")) {
maxLength = Integer.parseInt(h, 16);
continue;
}
if (s.equals("reference")) {
pinReference = Integer.parseInt(h, 16);
continue;
}
if (s.equals("pad")) {
padChar = Integer.parseInt(h, 16);
continue;
}
if (s.equals("flag")) {
if (h.equals("case-sensitive")) {
pinFlags |= FLAG_CASE_SENSITIVE;
} else
if (h.equals("change-disabled")) {
pinFlags |= FLAG_CHANGE_DISABLED;
} else
if (h.equals("unblock-disabled")) {
pinFlags |= FLAG_UNBLOCK_DISABLED;
} else
if (h.equals("needs-padding")) {
pinFlags |= FLAG_NEEDS_PADDING;
} else
if (h.equals("disable-allowed")) {
pinFlags |= FLAG_DISABLE_ALLOWED;
} else
if (h.equals("unblockingPIN")) {
pinFlags |= FLAG_UNBLOCKING_PIN;
} else {
throw new IOException();
}
continue;
}
throw new IOException();
}
}
/**
* Returns true if this PIN is a number.
* @return true if this PIN is a number.
*/
public boolean isNumeric() {
return (pinType != TYPE_UTF);
}
/**
* Returns maximum PIN length in characters.
* @return maximum PIN length in characters.
*/
public int getMaxLength() {
if ((pinFlags & FLAG_NEEDS_PADDING) == 0) {
return maxLength;
}
if (pinType == TYPE_BCD) {
return storedLength * 2;
}
// UTF symbol may occupy 1 or 2 bytes, additional check is necessary
return storedLength;
}
/**
* Verifies if the specified operation can be performed on this PIN.
* @param action operation identifier.
* @return true if the specified operation can be performed on this PIN.
*/
public boolean check(int action) {
if (action == ACLPermissions.CMD_CHANGE) {
return (pinFlags & FLAG_CHANGE_DISABLED) == 0;
}
if (action == ACLPermissions.CMD_DISABLE) {
return (pinFlags & FLAG_DISABLE_ALLOWED) != 0;
}
if (action == ACLPermissions.CMD_UNBLOCK) {
return (pinFlags & FLAG_UNBLOCK_DISABLED) == 0;
}
return true;
}
/**
* Verifies if this PIN can be used to unblock other PINs.
* @return true if this PIN can be used to unblock other PINs.
*/
public boolean isUnblockingPIN() {
return (pinFlags & FLAG_UNBLOCKING_PIN) != 0;
}
/**
* Transforms string entered by user according to PIN attributes.
* @param s the value enterd by user.
* @return converted and padded PIN value.
*/
public byte[] transform(String s) {
if (s.length() < minLength) {
return null;
}
byte[] data = null;
if (pinType == TYPE_UTF) {
if ((pinFlags & FLAG_CASE_SENSITIVE) == 0) {
s = s.toUpperCase(); // locale?
}
data = Utils.stringToBytes(s);
if (data.length > getMaxLength()) {
return null;
}
} else {
byte[] tmp = new byte[s.length()];
for (int i = 0; i < tmp.length; i++) {
tmp[i] = (byte) (s.charAt(i));
}
if (pinType == TYPE_ASCII || pinType == TYPE_ISO) {
data = tmp;
} else {
if (pinType == TYPE_HN) {
data = tmp;
for (int i = 0; i < data.length; i++) {
data[i] = (byte) (0xf0 | (data[i] - 0x30));
}
} else { // type == TYPE_BCD
data = new byte[(tmp.length + 1) / 2];
for (int i = 0; i < data.length; i++) {
int l = i * 2;
int b1 = tmp[l] - 0x30;
int b2;
if (l + 1 == tmp.length) {
b2 = padChar;
} else {
b2 = tmp[l + 1] - 0x30;
}
data[i] = (byte) ((b1 << 4) | (b2 & 0xf));
}
}
}
}
if (((pinFlags & FLAG_NEEDS_PADDING) == 0) ||
(data.length == storedLength)) {
return data;
}
byte[] r = new byte[storedLength];
System.arraycopy(data, 0, r, 0, data.length);
for (int i = data.length; i < storedLength; i++) {
r[i] = (byte) padChar;
}
return r;
}
}
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