| /* |
| * Copyright (c) 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 sun.java2d.cmm; |
| |
| public class ProfileDataVerifier { |
| /** |
| * Throws an IllegalArgumentException if the data does not correspond |
| * to a valid ICC Profile. |
| * |
| * @param data the specified profile data. |
| */ |
| public static void verify(byte[] data) { |
| if (data == null) { |
| throw new IllegalArgumentException("Invalid ICC Profile Data"); |
| } |
| |
| if (data.length < TOC_OFFSET) { |
| // not enough data for profile header |
| throw new IllegalArgumentException("Invalid ICC Profile Data"); |
| } |
| |
| // check profile size |
| final int size = readInt32(data, 0); |
| final int tagCount = readInt32(data, HEADER_SIZE); |
| |
| if (tagCount < 0 || tagCount > MAX_TAG_COUNT) { |
| throw new IllegalArgumentException("Invalid ICC Profile Data"); |
| } |
| |
| if (size < (TOC_OFFSET + (tagCount * TOC_RECORD_SIZE)) || |
| size > data.length) |
| { |
| throw new IllegalArgumentException("Invalid ICC Profile Data"); |
| } |
| |
| final int sig = readInt32(data, 36); |
| |
| if (PROFILE_FILE_SIGNATURE != sig) { |
| throw new IllegalArgumentException("Invalid ICC Profile Data"); |
| } |
| |
| // verify table of content |
| for (int i = 0; i < tagCount; i++) { |
| final int tag_offset = getTagOffset(i, data); |
| final int tag_size = getTagSize(i, data); |
| |
| if (tag_offset < TOC_OFFSET || tag_offset > size) { |
| throw new IllegalArgumentException("Invalid ICC Profile Data"); |
| } |
| |
| if (tag_size < 0 || |
| tag_size > (Integer.MAX_VALUE - tag_offset) || |
| tag_size + tag_offset > size) |
| { |
| throw new IllegalArgumentException("Invalid ICC Profile Data"); |
| } |
| } |
| } |
| |
| private static int getTagOffset(int idx, byte[] data) { |
| final int pos = TOC_OFFSET + idx * TOC_RECORD_SIZE + 4; |
| return readInt32(data, pos); |
| } |
| |
| private static int getTagSize(int idx, byte[] data) { |
| final int pos = TOC_OFFSET + idx * TOC_RECORD_SIZE + 8; |
| return readInt32(data, pos); |
| } |
| |
| private static int readInt32(byte[] data, int off) { |
| int res = 0; |
| for (int i = 0; i < 4; i++) { |
| res = res << 8; |
| |
| res |= (0xff & data[off++]); |
| } |
| return res; |
| } |
| |
| /** |
| * Lcms limit for the number of tags: 100 |
| * Kcms limit for the number of tags: N/A |
| */ |
| private static final int MAX_TAG_COUNT = 100; |
| |
| private static final int HEADER_SIZE = 128; |
| private static final int TOC_OFFSET = HEADER_SIZE + 4; |
| private static final int TOC_RECORD_SIZE = 12; |
| |
| private static final int PROFILE_FILE_SIGNATURE = 0x61637370; |
| } |