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| 1 | /* | ||
| 2 | * Copyright (c) 1996, 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.tools.jar; | ||
| 27 | |||
| 28 | import java.io.*; | ||
| 29 | import java.util.*; | ||
| 30 | import java.security.*; | ||
| 31 | |||
| 32 | import sun.net.www.MessageHeader; | ||
| 33 | import sun.misc.BASE64Encoder; | ||
| 34 | import sun.misc.BASE64Decoder; | ||
| 35 | |||
| 36 | import sun.security.pkcs.*; | ||
| 37 | import sun.security.x509.AlgorithmId; | ||
| 38 | |||
| 39 | /** | ||
| 40 | * <p>A signature file as defined in the <a | ||
| 41 | * href="manifest.html">Manifest and Signature Format</a>. It has | ||
| 42 | * essentially the same structure as a Manifest file in that it is a | ||
| 43 | * set of RFC 822 headers (sections). The first section contains meta | ||
| 44 | * data relevant to the entire file (i.e "Signature-Version:1.0") and | ||
| 45 | * each subsequent section contains data relevant to specific entries: | ||
| 46 | * entry sections. | ||
| 47 | * | ||
| 48 | * <p>Each entry section contains the name of an entry (which must | ||
| 49 | * have a counterpart in the manifest). Like the manifest it contains | ||
| 50 | * a hash, the hash of the manifest section correspondind to the | ||
| 51 | * name. Since the manifest entry contains the hash of the data, this | ||
| 52 | * is equivalent to a signature of the data, plus the attributes of | ||
| 53 | * the manifest entry. | ||
| 54 | * | ||
| 55 | * <p>This signature file format deal with PKCS7 encoded DSA signature | ||
| 56 | * block. It should be straightforward to extent to support other | ||
| 57 | * algorithms. | ||
| 58 | * | ||
| 59 | * @author David Brown | ||
| 60 | * @author Benjamin Renaud */ | ||
| 61 | |||
| 62 | public class SignatureFile { | ||
| 63 | |||
| 64 | /* Are we debugging? */ | ||
| 65 | static final boolean debug = false; | ||
| 66 | |||
| 67 | /* list of headers that all pertain to a particular file in the | ||
| 68 | * archive */ | ||
| 69 | private Vector entries = new Vector(); | ||
| 70 | |||
| 71 | /* Right now we only support SHA hashes */ | ||
| 72 | static final String[] hashes = {"SHA"}; | ||
| 73 | |||
| 74 | static final void debug(String s) { | ||
| 75 | if (debug) | ||
| 76 | System.out.println("sig> " + s); | ||
| 77 | } | ||
| 78 | |||
| 79 | /* | ||
| 80 | * The manifest we're working with. */ | ||
| 81 | private Manifest manifest; | ||
| 82 | |||
| 83 | /* | ||
| 84 | * The file name for the file. This is the raw name, i.e. the | ||
| 85 | * extention-less 8 character name (such as MYSIGN) which wil be | ||
| 86 | * used to build the signature filename (MYSIGN.SF) and the block | ||
| 87 | * filename (MYSIGN.DSA) */ | ||
| 88 | private String rawName; | ||
| 89 | |||
| 90 | /* The digital signature block corresponding to this signature | ||
| 91 | * file. */ | ||
| 92 | private PKCS7 signatureBlock; | ||
| 93 | |||
| 94 | |||
| 95 | /** | ||
| 96 | * Private constructor which takes a name a given signature | ||
| 97 | * file. The name must be extension-less and less or equal to 8 | ||
| 98 | * character in length. */ | ||
| 99 | private SignatureFile(String name) throws JarException { | ||
| 100 | |||
| 101 | entries = new Vector(); | ||
| 102 | |||
| 103 | if (name != null) { | ||
| 104 | if (name.length() > 8 || name.indexOf('.') != -1) { | ||
| 105 | throw new JarException("invalid file name"); | ||
| 106 | } | ||
| 107 | rawName = name.toUpperCase(Locale.ENGLISH); | ||
| 108 | } | ||
| 109 | } | ||
| 110 | |||
| 111 | /** | ||
| 112 | * Private constructor which takes a name a given signature file | ||
| 113 | * and a new file predicate. If it is a new file, a main header | ||
| 114 | * will be added. */ | ||
| 115 | private SignatureFile(String name, boolean newFile) | ||
| 116 | throws JarException { | ||
| 117 | |||
| 118 | this(name); | ||
| 119 | |||
| 120 | if (newFile) { | ||
| 121 | MessageHeader globals = new MessageHeader(); | ||
| 122 | globals.set("Signature-Version", "1.0"); | ||
| 123 | entries.addElement(globals); | ||
| 124 | } | ||
| 125 | } | ||
| 126 | |||
| 127 | /** | ||
| 128 | * Constructs a new Signature file corresponding to a given | ||
| 129 | * Manifest. All entries in the manifest are signed. | ||
| 130 | * | ||
| 131 | * @param manifest the manifest to use. | ||
| 132 | * | ||
| 133 | * @param name for this signature file. This should | ||
| 134 | * be less than 8 characters, and without a suffix (i.e. | ||
| 135 | * without a period in it. | ||
| 136 | * | ||
| 137 | * @exception JarException if an invalid name is passed in. | ||
| 138 | */ | ||
| 139 | public SignatureFile(Manifest manifest, String name) | ||
| 140 | throws JarException { | ||
| 141 | |||
| 142 | this(name, true); | ||
| 143 | |||
| 144 | this.manifest = manifest; | ||
| 145 | Enumeration enum_ = manifest.entries(); | ||
| 146 | while (enum_.hasMoreElements()) { | ||
| 147 | MessageHeader mh = (MessageHeader)enum_.nextElement(); | ||
| 148 | String entryName = mh.findValue("Name"); | ||
| 149 | if (entryName != null) { | ||
| 150 | add(entryName); | ||
| 151 | } | ||
| 152 | } | ||
| 153 | } | ||
| 154 | |||
| 155 | /** | ||
| 156 | * Constructs a new Signature file corresponding to a given | ||
| 157 | * Manifest. Specific entries in the manifest are signed. | ||
| 158 | * | ||
| 159 | * @param manifest the manifest to use. | ||
| 160 | * | ||
| 161 | * @param entries the entries to sign. | ||
| 162 | * | ||
| 163 | * @param filename for this signature file. This should | ||
| 164 | * be less than 8 characters, and without a suffix (i.e. | ||
| 165 | * without a period in it. | ||
| 166 | * | ||
| 167 | * @exception JarException if an invalid name is passed in. | ||
| 168 | */ | ||
| 169 | public SignatureFile(Manifest manifest, String[] entries, | ||
| 170 | String filename) | ||
| 171 | throws JarException { | ||
| 172 | this(filename, true); | ||
| 173 | this.manifest = manifest; | ||
| 174 | add(entries); | ||
| 175 | } | ||
| 176 | |||
| 177 | /** | ||
| 178 | * Construct a Signature file from an input stream. | ||
| 179 | * | ||
| 180 | * @exception IOException if an invalid name is passed in or if a | ||
| 181 | * stream exception occurs. | ||
| 182 | */ | ||
| 183 | public SignatureFile(InputStream is, String filename) | ||
| 184 | throws IOException { | ||
| 185 | this(filename); | ||
| 186 | while (is.available() > 0) { | ||
| 187 | MessageHeader m = new MessageHeader(is); | ||
| 188 | entries.addElement(m); | ||
| 189 | } | ||
| 190 | } | ||
| 191 | |||
| 192 | /** | ||
| 193 | * Construct a Signature file from an input stream. | ||
| 194 | * | ||
| 195 | * @exception IOException if an invalid name is passed in or if a | ||
| 196 | * stream exception occurs. | ||
| 197 | */ | ||
| 198 | public SignatureFile(InputStream is) throws IOException { | ||
| 199 | this(is, null); | ||
| 200 | } | ||
| 201 | |||
| 202 | public SignatureFile(byte[] bytes) throws IOException { | ||
| 203 | this(new ByteArrayInputStream(bytes)); | ||
| 204 | } | ||
| 205 | |||
| 206 | /** | ||
| 207 | * Returns the name of the signature file, ending with a ".SF" | ||
| 208 | * suffix */ | ||
| 209 | public String getName() { | ||
| 210 | return "META-INF/" + rawName + ".SF"; | ||
| 211 | } | ||
| 212 | |||
| 213 | /** | ||
| 214 | * Returns the name of the block file, ending with a block suffix | ||
| 215 | * such as ".DSA". */ | ||
| 216 | public String getBlockName() { | ||
| 217 | String suffix = "DSA"; | ||
| 218 | if (signatureBlock != null) { | ||
| 219 | SignerInfo info = signatureBlock.getSignerInfos()[0]; | ||
| 220 | suffix = info.getDigestEncryptionAlgorithmId().getName(); | ||
| 221 | String temp = AlgorithmId.getEncAlgFromSigAlg(suffix); | ||
| 222 | if (temp != null) suffix = temp; | ||
| 223 | } | ||
| 224 | return "META-INF/" + rawName + "." + suffix; | ||
| 225 | } | ||
| 226 | |||
| 227 | /** | ||
| 228 | * Returns the signature block associated with this file. | ||
| 229 | */ | ||
| 230 | public PKCS7 getBlock() { | ||
| 231 | return signatureBlock; | ||
| 232 | } | ||
| 233 | |||
| 234 | /** | ||
| 235 | * Sets the signature block associated with this file. | ||
| 236 | */ | ||
| 237 | public void setBlock(PKCS7 block) { | ||
| 238 | this.signatureBlock = block; | ||
| 239 | } | ||
| 240 | |||
| 241 | /** | ||
| 242 | * Add a set of entries from the current manifest. | ||
| 243 | */ | ||
| 244 | public void add(String[] entries) throws JarException { | ||
| 245 | for (int i = 0; i < entries.length; i++) { | ||
| 246 | add (entries[i]); | ||
| 247 | } | ||
| 248 | } | ||
| 249 | |||
| 250 | /** | ||
| 251 | * Add a specific entry from the current manifest. | ||
| 252 | */ | ||
| 253 | public void add(String entry) throws JarException { | ||
| 254 | MessageHeader mh = manifest.getEntry(entry); | ||
| 255 | if (mh == null) { | ||
| 256 | throw new JarException("entry " + entry + " not in manifest"); | ||
| 257 | } | ||
| 258 | MessageHeader smh; | ||
| 259 | try { | ||
| 260 | smh = computeEntry(mh); | ||
| 261 | } catch (IOException e) { | ||
| 262 | throw new JarException(e.getMessage()); | ||
| 263 | } | ||
| 264 | entries.addElement(smh); | ||
| 265 | } | ||
| 266 | |||
| 267 | /** | ||
| 268 | * Get the entry corresponding to a given name. Returns null if | ||
| 269 | *the entry does not exist. | ||
| 270 | */ | ||
| 271 | public MessageHeader getEntry(String name) { | ||
| 272 | Enumeration enum_ = entries(); | ||
| 273 | while(enum_.hasMoreElements()) { | ||
| 274 | MessageHeader mh = (MessageHeader)enum_.nextElement(); | ||
| 275 | if (name.equals(mh.findValue("Name"))) { | ||
| 276 | return mh; | ||
| 277 | } | ||
| 278 | } | ||
| 279 | return null; | ||
| 280 | } | ||
| 281 | |||
| 282 | /** | ||
| 283 | * Returns the n-th entry. The global header is a entry 0. */ | ||
| 284 | public MessageHeader entryAt(int n) { | ||
| 285 | return (MessageHeader) entries.elementAt(n); | ||
| 286 | } | ||
| 287 | |||
| 288 | /** | ||
| 289 | * Returns an enumeration of the entries. | ||
| 290 | */ | ||
| 291 | public Enumeration entries() { | ||
| 292 | return entries.elements(); | ||
| 293 | } | ||
| 294 | |||
| 295 | /** | ||
| 296 | * Given a manifest entry, computes the signature entry for this | ||
| 297 | * manifest entry. | ||
| 298 | */ | ||
| 299 | private MessageHeader computeEntry(MessageHeader mh) throws IOException { | ||
| 300 | MessageHeader smh = new MessageHeader(); | ||
| 301 | |||
| 302 | String name = mh.findValue("Name"); | ||
| 303 | if (name == null) { | ||
| 304 | return null; | ||
| 305 | } | ||
| 306 | smh.set("Name", name); | ||
| 307 | |||
| 308 | BASE64Encoder encoder = new BASE64Encoder(); | ||
| 309 | try { | ||
| 310 | for (int i = 0; i < hashes.length; ++i) { | ||
| 311 | MessageDigest dig = getDigest(hashes[i]); | ||
| 312 | ByteArrayOutputStream baos = new ByteArrayOutputStream(); | ||
| 313 | PrintStream ps = new PrintStream(baos); | ||
| 314 | mh.print(ps); | ||
| 315 | byte[] headerBytes = baos.toByteArray(); | ||
| 316 | byte[] digest = dig.digest(headerBytes); | ||
| 317 | smh.set(hashes[i] + "-Digest", encoder.encode(digest)); | ||
| 318 | } | ||
| 319 | return smh; | ||
| 320 | } catch (NoSuchAlgorithmException e) { | ||
| 321 | throw new JarException(e.getMessage()); | ||
| 322 | } | ||
| 323 | } | ||
| 324 | |||
| 325 | private Hashtable digests = new Hashtable(); | ||
| 326 | |||
| 327 | private MessageDigest getDigest(String algorithm) | ||
| 328 | throws NoSuchAlgorithmException { | ||
| 329 | MessageDigest dig = (MessageDigest)digests.get(algorithm); | ||
| 330 | if (dig == null) { | ||
| 331 | dig = MessageDigest.getInstance(algorithm); | ||
| 332 | digests.put(algorithm, dig); | ||
| 333 | } | ||
| 334 | dig.reset(); | ||
| 335 | return dig; | ||
| 336 | } | ||
| 337 | |||
| 338 | |||
| 339 | /** | ||
| 340 | * Add a signature file at current position in a stream | ||
| 341 | */ | ||
| 342 | public void stream(OutputStream os) throws IOException { | ||
| 343 | |||
| 344 | /* the first header in the file should be the global one. | ||
| 345 | * It should say "SignatureFile-Version: x.x"; barf if not | ||
| 346 | */ | ||
| 347 | MessageHeader globals = (MessageHeader) entries.elementAt(0); | ||
| 348 | if (globals.findValue("Signature-Version") == null) { | ||
| 349 | throw new JarException("Signature file requires " + | ||
| 350 | "Signature-Version: 1.0 in 1st header"); | ||
| 351 | } | ||
| 352 | |||
| 353 | PrintStream ps = new PrintStream(os); | ||
| 354 | globals.print(ps); | ||
| 355 | |||
| 356 | for (int i = 1; i < entries.size(); ++i) { | ||
| 357 | MessageHeader mh = (MessageHeader) entries.elementAt(i); | ||
| 358 | mh.print(ps); | ||
| 359 | } | ||
| 360 | } | ||
| 361 | } | ||