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| 1 | /* | ||
| 2 | * Copyright (c) 1997, 2009, Oracle and/or its affiliates. All rights reserved. | ||
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | ||
| 4 | * | ||
| 5 | * This code is free software; you can redistribute it and/or modify it | ||
| 6 | * under the terms of the GNU General Public License version 2 only, as | ||
| 7 | * published by the Free Software Foundation. Oracle designates this | ||
| 8 | * particular file as subject to the "Classpath" exception as provided | ||
| 9 | * by Oracle in the LICENSE file that accompanied this code. | ||
| 10 | * | ||
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT | ||
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | ||
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | ||
| 14 | * version 2 for more details (a copy is included in the LICENSE file that | ||
| 15 | * accompanied this code). | ||
| 16 | * | ||
| 17 | * You should have received a copy of the GNU General Public License version | ||
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, | ||
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | ||
| 20 | * | ||
| 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | ||
| 22 | * or visit www.oracle.com if you need additional information or have any | ||
| 23 | * questions. | ||
| 24 | */ | ||
| 25 | |||
| 26 | package sun.security.util; | ||
| 27 | |||
| 28 | import java.security.*; | ||
| 29 | import java.util.HashMap; | ||
| 30 | import java.io.ByteArrayOutputStream; | ||
| 31 | |||
| 32 | /** | ||
| 33 | * This class is used to compute digests on sections of the Manifest. | ||
| 34 | */ | ||
| 35 | public class ManifestDigester { | ||
| 36 | |||
| 37 | public static final String MF_MAIN_ATTRS = "Manifest-Main-Attributes"; | ||
| 38 | |||
| 39 | /** the raw bytes of the manifest */ | ||
| 40 | private byte rawBytes[]; | ||
| 41 | |||
| 42 | /** the offset/length pair for a section */ | ||
| 43 | private HashMap<String, Entry> entries; // key is a UTF-8 string | ||
| 44 | |||
| 45 | /** state returned by findSection */ | ||
| 46 | static class Position { | ||
| 47 | int endOfFirstLine; // not including newline character | ||
| 48 | |||
| 49 | int endOfSection; // end of section, not including the blank line | ||
| 50 | // between sections | ||
| 51 | int startOfNext; // the start of the next section | ||
| 52 | } | ||
| 53 | |||
| 54 | /** | ||
| 55 | * find a section in the manifest. | ||
| 56 | * | ||
| 57 | * @param offset should point to the starting offset with in the | ||
| 58 | * raw bytes of the next section. | ||
| 59 | * | ||
| 60 | * @pos set by | ||
| 61 | * | ||
| 62 | * @returns false if end of bytes has been reached, otherwise returns | ||
| 63 | * true | ||
| 64 | */ | ||
| 65 | private boolean findSection(int offset, Position pos) | ||
| 66 | { | ||
| 67 | int i = offset, len = rawBytes.length; | ||
| 68 | int last = offset; | ||
| 69 | int next; | ||
| 70 | boolean allBlank = true; | ||
| 71 | |||
| 72 | pos.endOfFirstLine = -1; | ||
| 73 | |||
| 74 | while (i < len) { | ||
| 75 | byte b = rawBytes[i]; | ||
| 76 | switch(b) { | ||
| 77 | case '\r': | ||
| 78 | if (pos.endOfFirstLine == -1) | ||
| 79 | pos.endOfFirstLine = i-1; | ||
| 80 | if ((i < len) && (rawBytes[i+1] == '\n')) | ||
| 81 | i++; | ||
| 82 | case '\n': | ||
| 83 | if (pos.endOfFirstLine == -1) | ||
| 84 | pos.endOfFirstLine = i-1; | ||
| 85 | if (allBlank || (i == len-1)) { | ||
| 86 | if (i == len-1) | ||
| 87 | pos.endOfSection = i; | ||
| 88 | else | ||
| 89 | pos.endOfSection = last; | ||
| 90 | pos.startOfNext = i+1; | ||
| 91 | return true; | ||
| 92 | } | ||
| 93 | else { | ||
| 94 | // start of a new line | ||
| 95 | last = i; | ||
| 96 | allBlank = true; | ||
| 97 | } | ||
| 98 | break; | ||
| 99 | default: | ||
| 100 | allBlank = false; | ||
| 101 | break; | ||
| 102 | } | ||
| 103 | i++; | ||
| 104 | } | ||
| 105 | return false; | ||
| 106 | } | ||
| 107 | |||
| 108 | public ManifestDigester(byte bytes[]) | ||
| 109 | { | ||
| 110 | rawBytes = bytes; | ||
| 111 | entries = new HashMap<String, Entry>(); | ||
| 112 | |||
| 113 | ByteArrayOutputStream baos = new ByteArrayOutputStream(); | ||
| 114 | |||
| 115 | Position pos = new Position(); | ||
| 116 | |||
| 117 | if (!findSection(0, pos)) | ||
| 118 | return; // XXX: exception? | ||
| 119 | |||
| 120 | // create an entry for main attributes | ||
| 121 | entries.put(MF_MAIN_ATTRS, | ||
| 122 | new Entry(0, pos.endOfSection + 1, pos.startOfNext, rawBytes)); | ||
| 123 | |||
| 124 | int start = pos.startOfNext; | ||
| 125 | while(findSection(start, pos)) { | ||
| 126 | int len = pos.endOfFirstLine-start+1; | ||
| 127 | int sectionLen = pos.endOfSection-start+1; | ||
| 128 | int sectionLenWithBlank = pos.startOfNext-start; | ||
| 129 | |||
| 130 | if (len > 6) { | ||
| 131 | if (isNameAttr(bytes, start)) { | ||
| 132 | StringBuilder nameBuf = new StringBuilder(sectionLen); | ||
| 133 | |||
| 134 | try { | ||
| 135 | nameBuf.append( | ||
| 136 | new String(bytes, start+6, len-6, "UTF8")); | ||
| 137 | |||
| 138 | int i = start + len; | ||
| 139 | if ((i-start) < sectionLen) { | ||
| 140 | if (bytes[i] == '\r') { | ||
| 141 | i += 2; | ||
| 142 | } else { | ||
| 143 | i += 1; | ||
| 144 | } | ||
| 145 | } | ||
| 146 | |||
| 147 | while ((i-start) < sectionLen) { | ||
| 148 | if (bytes[i++] == ' ') { | ||
| 149 | // name is wrapped | ||
| 150 | int wrapStart = i; | ||
| 151 | while (((i-start) < sectionLen) | ||
| 152 | && (bytes[i++] != '\n')); | ||
| 153 | if (bytes[i-1] != '\n') | ||
| 154 | return; // XXX: exception? | ||
| 155 | int wrapLen; | ||
| 156 | if (bytes[i-2] == '\r') | ||
| 157 | wrapLen = i-wrapStart-2; | ||
| 158 | else | ||
| 159 | wrapLen = i-wrapStart-1; | ||
| 160 | |||
| 161 | nameBuf.append(new String(bytes, wrapStart, | ||
| 162 | wrapLen, "UTF8")); | ||
| 163 | } else { | ||
| 164 | break; | ||
| 165 | } | ||
| 166 | } | ||
| 167 | |||
| 168 | entries.put(nameBuf.toString(), | ||
| 169 | new Entry(start, sectionLen, sectionLenWithBlank, | ||
| 170 | rawBytes)); | ||
| 171 | |||
| 172 | } catch (java.io.UnsupportedEncodingException uee) { | ||
| 173 | throw new IllegalStateException( | ||
| 174 | "UTF8 not available on platform"); | ||
| 175 | } | ||
| 176 | } | ||
| 177 | } | ||
| 178 | start = pos.startOfNext; | ||
| 179 | } | ||
| 180 | } | ||
| 181 | |||
| 182 | private boolean isNameAttr(byte bytes[], int start) | ||
| 183 | { | ||
| 184 | return ((bytes[start] == 'N') || (bytes[start] == 'n')) && | ||
| 185 | ((bytes[start+1] == 'a') || (bytes[start+1] == 'A')) && | ||
| 186 | ((bytes[start+2] == 'm') || (bytes[start+2] == 'M')) && | ||
| 187 | ((bytes[start+3] == 'e') || (bytes[start+3] == 'E')) && | ||
| 188 | (bytes[start+4] == ':') && | ||
| 189 | (bytes[start+5] == ' '); | ||
| 190 | } | ||
| 191 | |||
| 192 | public static class Entry { | ||
| 193 | int offset; | ||
| 194 | int length; | ||
| 195 | int lengthWithBlankLine; | ||
| 196 | byte[] rawBytes; | ||
| 197 | boolean oldStyle; | ||
| 198 | |||
| 199 | public Entry(int offset, int length, | ||
| 200 | int lengthWithBlankLine, byte[] rawBytes) | ||
| 201 | { | ||
| 202 | this.offset = offset; | ||
| 203 | this.length = length; | ||
| 204 | this.lengthWithBlankLine = lengthWithBlankLine; | ||
| 205 | this.rawBytes = rawBytes; | ||
| 206 | } | ||
| 207 | |||
| 208 | public byte[] digest(MessageDigest md) | ||
| 209 | { | ||
| 210 | md.reset(); | ||
| 211 | if (oldStyle) { | ||
| 212 | doOldStyle(md,rawBytes, offset, lengthWithBlankLine); | ||
| 213 | } else { | ||
| 214 | md.update(rawBytes, offset, lengthWithBlankLine); | ||
| 215 | } | ||
| 216 | return md.digest(); | ||
| 217 | } | ||
| 218 | |||
| 219 | private void doOldStyle(MessageDigest md, | ||
| 220 | byte[] bytes, | ||
| 221 | int offset, | ||
| 222 | int length) | ||
| 223 | { | ||
| 224 | // this is too gross to even document, but here goes | ||
| 225 | // the 1.1 jar verification code ignored spaces at the | ||
| 226 | // end of lines when calculating digests, so that is | ||
| 227 | // what this code does. It only gets called if we | ||
| 228 | // are parsing a 1.1 signed signature file | ||
| 229 | int i = offset; | ||
| 230 | int start = offset; | ||
| 231 | int max = offset + length; | ||
| 232 | int prev = -1; | ||
| 233 | while(i <max) { | ||
| 234 | if ((bytes[i] == '\r') && (prev == ' ')) { | ||
| 235 | md.update(bytes, start, i-start-1); | ||
| 236 | start = i; | ||
| 237 | } | ||
| 238 | prev = bytes[i]; | ||
| 239 | i++; | ||
| 240 | } | ||
| 241 | md.update(bytes, start, i-start); | ||
| 242 | } | ||
| 243 | |||
| 244 | |||
| 245 | /** Netscape doesn't include the new line. Intel and JavaSoft do */ | ||
| 246 | |||
| 247 | public byte[] digestWorkaround(MessageDigest md) | ||
| 248 | { | ||
| 249 | md.reset(); | ||
| 250 | md.update(rawBytes, offset, length); | ||
| 251 | return md.digest(); | ||
| 252 | } | ||
| 253 | } | ||
| 254 | |||
| 255 | public Entry get(String name, boolean oldStyle) { | ||
| 256 | Entry e = entries.get(name); | ||
| 257 | if (e != null) | ||
| 258 | e.oldStyle = oldStyle; | ||
| 259 | return e; | ||
| 260 | } | ||
| 261 | |||
| 262 | public byte[] manifestDigest(MessageDigest md) | ||
| 263 | { | ||
| 264 | md.reset(); | ||
| 265 | md.update(rawBytes, 0, rawBytes.length); | ||
| 266 | return md.digest(); | ||
| 267 | } | ||
| 268 | |||
| 269 | } | ||