| /* |
| * Copyright (c) 1997, 2011, 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.security.util; |
| |
| import java.security.*; |
| import java.util.HashMap; |
| import java.io.ByteArrayOutputStream; |
| |
| /** |
| * This class is used to compute digests on sections of the Manifest. |
| */ |
| public class ManifestDigester { |
| |
| public static final String MF_MAIN_ATTRS = "Manifest-Main-Attributes"; |
| |
| /** the raw bytes of the manifest */ |
| private byte[] rawBytes; |
| |
| /** the offset/length pair for a section */ |
| private HashMap<String, Entry> entries; // key is a UTF-8 string |
| |
| /** state returned by findSection */ |
| static class Position { |
| int endOfFirstLine; // not including newline character |
| |
| int endOfSection; // end of section, not including the blank line |
| // between sections |
| int startOfNext; // the start of the next section |
| } |
| |
| /** |
| * find a section in the manifest. |
| * |
| * @param offset should point to the starting offset with in the |
| * raw bytes of the next section. |
| * |
| * @pos set by |
| * |
| * @return false if end of bytes has been reached, otherwise returns |
| * true |
| */ |
| @SuppressWarnings("fallthrough") |
| private boolean findSection(int offset, Position pos) |
| { |
| int i = offset, len = rawBytes.length; |
| int last = offset; |
| int next; |
| boolean allBlank = true; |
| |
| pos.endOfFirstLine = -1; |
| |
| while (i < len) { |
| byte b = rawBytes[i]; |
| switch(b) { |
| case '\r': |
| if (pos.endOfFirstLine == -1) |
| pos.endOfFirstLine = i-1; |
| if ((i < len) && (rawBytes[i+1] == '\n')) |
| i++; |
| /* fall through */ |
| case '\n': |
| if (pos.endOfFirstLine == -1) |
| pos.endOfFirstLine = i-1; |
| if (allBlank || (i == len-1)) { |
| if (i == len-1) |
| pos.endOfSection = i; |
| else |
| pos.endOfSection = last; |
| pos.startOfNext = i+1; |
| return true; |
| } |
| else { |
| // start of a new line |
| last = i; |
| allBlank = true; |
| } |
| break; |
| default: |
| allBlank = false; |
| break; |
| } |
| i++; |
| } |
| return false; |
| } |
| |
| public ManifestDigester(byte[] bytes) |
| { |
| rawBytes = bytes; |
| entries = new HashMap<>(); |
| |
| ByteArrayOutputStream baos = new ByteArrayOutputStream(); |
| |
| Position pos = new Position(); |
| |
| if (!findSection(0, pos)) |
| return; // XXX: exception? |
| |
| // create an entry for main attributes |
| entries.put(MF_MAIN_ATTRS, |
| new Entry(0, pos.endOfSection + 1, pos.startOfNext, rawBytes)); |
| |
| int start = pos.startOfNext; |
| while(findSection(start, pos)) { |
| int len = pos.endOfFirstLine-start+1; |
| int sectionLen = pos.endOfSection-start+1; |
| int sectionLenWithBlank = pos.startOfNext-start; |
| |
| if (len > 6) { |
| if (isNameAttr(bytes, start)) { |
| StringBuilder nameBuf = new StringBuilder(sectionLen); |
| |
| try { |
| nameBuf.append( |
| new String(bytes, start+6, len-6, "UTF8")); |
| |
| int i = start + len; |
| if ((i-start) < sectionLen) { |
| if (bytes[i] == '\r') { |
| i += 2; |
| } else { |
| i += 1; |
| } |
| } |
| |
| while ((i-start) < sectionLen) { |
| if (bytes[i++] == ' ') { |
| // name is wrapped |
| int wrapStart = i; |
| while (((i-start) < sectionLen) |
| && (bytes[i++] != '\n')); |
| if (bytes[i-1] != '\n') |
| return; // XXX: exception? |
| int wrapLen; |
| if (bytes[i-2] == '\r') |
| wrapLen = i-wrapStart-2; |
| else |
| wrapLen = i-wrapStart-1; |
| |
| nameBuf.append(new String(bytes, wrapStart, |
| wrapLen, "UTF8")); |
| } else { |
| break; |
| } |
| } |
| |
| entries.put(nameBuf.toString(), |
| new Entry(start, sectionLen, sectionLenWithBlank, |
| rawBytes)); |
| |
| } catch (java.io.UnsupportedEncodingException uee) { |
| throw new IllegalStateException( |
| "UTF8 not available on platform"); |
| } |
| } |
| } |
| start = pos.startOfNext; |
| } |
| } |
| |
| private boolean isNameAttr(byte[] bytes, int start) |
| { |
| return ((bytes[start] == 'N') || (bytes[start] == 'n')) && |
| ((bytes[start+1] == 'a') || (bytes[start+1] == 'A')) && |
| ((bytes[start+2] == 'm') || (bytes[start+2] == 'M')) && |
| ((bytes[start+3] == 'e') || (bytes[start+3] == 'E')) && |
| (bytes[start+4] == ':') && |
| (bytes[start+5] == ' '); |
| } |
| |
| public static class Entry { |
| int offset; |
| int length; |
| int lengthWithBlankLine; |
| byte[] rawBytes; |
| boolean oldStyle; |
| |
| public Entry(int offset, int length, |
| int lengthWithBlankLine, byte[] rawBytes) |
| { |
| this.offset = offset; |
| this.length = length; |
| this.lengthWithBlankLine = lengthWithBlankLine; |
| this.rawBytes = rawBytes; |
| } |
| |
| public byte[] digest(MessageDigest md) |
| { |
| md.reset(); |
| if (oldStyle) { |
| doOldStyle(md,rawBytes, offset, lengthWithBlankLine); |
| } else { |
| md.update(rawBytes, offset, lengthWithBlankLine); |
| } |
| return md.digest(); |
| } |
| |
| private void doOldStyle(MessageDigest md, |
| byte[] bytes, |
| int offset, |
| int length) |
| { |
| // this is too gross to even document, but here goes |
| // the 1.1 jar verification code ignored spaces at the |
| // end of lines when calculating digests, so that is |
| // what this code does. It only gets called if we |
| // are parsing a 1.1 signed signature file |
| int i = offset; |
| int start = offset; |
| int max = offset + length; |
| int prev = -1; |
| while(i <max) { |
| if ((bytes[i] == '\r') && (prev == ' ')) { |
| md.update(bytes, start, i-start-1); |
| start = i; |
| } |
| prev = bytes[i]; |
| i++; |
| } |
| md.update(bytes, start, i-start); |
| } |
| |
| |
| /** Netscape doesn't include the new line. Intel and JavaSoft do */ |
| |
| public byte[] digestWorkaround(MessageDigest md) |
| { |
| md.reset(); |
| md.update(rawBytes, offset, length); |
| return md.digest(); |
| } |
| } |
| |
| public Entry get(String name, boolean oldStyle) { |
| Entry e = entries.get(name); |
| if (e != null) |
| e.oldStyle = oldStyle; |
| return e; |
| } |
| |
| public byte[] manifestDigest(MessageDigest md) { |
| md.reset(); |
| md.update(rawBytes, 0, rawBytes.length); |
| return md.digest(); |
| } |
| |
| } |