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| 1 | +/* | |
| 2 | + * Copyright (c) 1996, 2008, 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 | + | |
| 27 | +package sun.security.ssl; | |
| 28 | + | |
| 29 | +import java.io.*; | |
| 30 | +import java.nio.*; | |
| 31 | +import java.net.SocketException; | |
| 32 | +import java.net.SocketTimeoutException; | |
| 33 | + | |
| 34 | +import javax.crypto.BadPaddingException; | |
| 35 | + | |
| 36 | +import javax.net.ssl.*; | |
| 37 | + | |
| 38 | +import sun.misc.HexDumpEncoder; | |
| 39 | + | |
| 40 | + | |
| 41 | +/** | |
| 42 | + * SSL 3.0 records, as pulled off a TCP stream. Input records are | |
| 43 | + * basically buffers tied to a particular input stream ... a layer | |
| 44 | + * above this must map these records into the model of a continuous | |
| 45 | + * stream of data. | |
| 46 | + * | |
| 47 | + * Since this returns SSL 3.0 records, it's the layer that needs to | |
| 48 | + * map SSL 2.0 style handshake records into SSL 3.0 ones for those | |
| 49 | + * "old" clients that interop with both V2 and V3 servers. Not as | |
| 50 | + * pretty as might be desired. | |
| 51 | + * | |
| 52 | + * NOTE: During handshaking, each message must be hashed to support | |
| 53 | + * verification that the handshake process wasn't compromised. | |
| 54 | + * | |
| 55 | + * @author David Brownell | |
| 56 | + */ | |
| 57 | +class InputRecord extends ByteArrayInputStream implements Record { | |
| 58 | + | |
| 59 | + private HandshakeHash handshakeHash; | |
| 60 | + private int lastHashed; | |
| 61 | + boolean formatVerified = true; // SSLv2 ruled out? | |
| 62 | + private boolean isClosed; | |
| 63 | + private boolean appDataValid; | |
| 64 | + | |
| 65 | + // The ClientHello version to accept. If set to ProtocolVersion.SSL20Hello | |
| 66 | + // and the first message we read is a ClientHello in V2 format, we convert | |
| 67 | + // it to V3. Otherwise we throw an exception when encountering a V2 hello. | |
| 68 | + private ProtocolVersion helloVersion; | |
| 69 | + | |
| 70 | + /* Class and subclass dynamic debugging support */ | |
| 71 | + static final Debug debug = Debug.getInstance("ssl"); | |
| 72 | + | |
| 73 | + /* The existing record length */ | |
| 74 | + private int exlen; | |
| 75 | + | |
| 76 | + /* V2 handshake message */ | |
| 77 | + private byte v2Buf[]; | |
| 78 | + | |
| 79 | + /* | |
| 80 | + * Construct the record to hold the maximum sized input record. | |
| 81 | + * Data will be filled in separately. | |
| 82 | + */ | |
| 83 | + InputRecord() { | |
| 84 | + super(new byte[maxRecordSize]); | |
| 85 | + setHelloVersion(ProtocolVersion.DEFAULT_HELLO); | |
| 86 | + pos = headerSize; | |
| 87 | + count = headerSize; | |
| 88 | + lastHashed = count; | |
| 89 | + exlen = 0; | |
| 90 | + v2Buf = null; | |
| 91 | + } | |
| 92 | + | |
| 93 | + void setHelloVersion(ProtocolVersion helloVersion) { | |
| 94 | + this.helloVersion = helloVersion; | |
| 95 | + } | |
| 96 | + | |
| 97 | + ProtocolVersion getHelloVersion() { | |
| 98 | + return helloVersion; | |
| 99 | + } | |
| 100 | + | |
| 101 | + /* | |
| 102 | + * Enable format checks if initial handshaking hasn't completed | |
| 103 | + */ | |
| 104 | + void enableFormatChecks() { | |
| 105 | + formatVerified = false; | |
| 106 | + } | |
| 107 | + | |
| 108 | + // return whether the data in this record is valid, decrypted data | |
| 109 | + boolean isAppDataValid() { | |
| 110 | + return appDataValid; | |
| 111 | + } | |
| 112 | + | |
| 113 | + void setAppDataValid(boolean value) { | |
| 114 | + appDataValid = value; | |
| 115 | + } | |
| 116 | + | |
| 117 | + /* | |
| 118 | + * Return the content type of the record. | |
| 119 | + */ | |
| 120 | + byte contentType() { | |
| 121 | + return buf[0]; | |
| 122 | + } | |
| 123 | + | |
| 124 | + /* | |
| 125 | + * For handshaking, we need to be able to hash every byte above the | |
| 126 | + * record marking layer. This is where we're guaranteed to see those | |
| 127 | + * bytes, so this is where we can hash them ... especially in the | |
| 128 | + * case of hashing the initial V2 message! | |
| 129 | + */ | |
| 130 | + void setHandshakeHash(HandshakeHash handshakeHash) { | |
| 131 | + this.handshakeHash = handshakeHash; | |
| 132 | + } | |
| 133 | + | |
| 134 | + HandshakeHash getHandshakeHash() { | |
| 135 | + return handshakeHash; | |
| 136 | + } | |
| 137 | + | |
| 138 | + /* | |
| 139 | + * Verify and remove the MAC ... used for all records. | |
| 140 | + */ | |
| 141 | + boolean checkMAC(MAC signer) { | |
| 142 | + int len = signer.MAClen(); | |
| 143 | + if (len == 0) { // no mac | |
| 144 | + return true; | |
| 145 | + } | |
| 146 | + | |
| 147 | + int offset = count - len; | |
| 148 | + | |
| 149 | + if (offset < headerSize) { | |
| 150 | + // data length would be negative, something is wrong | |
| 151 | + return false; | |
| 152 | + } | |
| 153 | + | |
| 154 | + byte[] mac = signer.compute(contentType(), buf, | |
| 155 | + headerSize, offset - headerSize); | |
| 156 | + | |
| 157 | + if (len != mac.length) { | |
| 158 | + throw new RuntimeException("Internal MAC error"); | |
| 159 | + } | |
| 160 | + | |
| 161 | + for (int i = 0; i < len; i++) { | |
| 162 | + if (buf[offset + i] != mac[i]) { | |
| 163 | + return false; | |
| 164 | + } | |
| 165 | + } | |
| 166 | + count -= len; | |
| 167 | + return true; | |
| 168 | + } | |
| 169 | + | |
| 170 | + void decrypt(CipherBox box) throws BadPaddingException { | |
| 171 | + int len = count - headerSize; | |
| 172 | + count = headerSize + box.decrypt(buf, headerSize, len); | |
| 173 | + } | |
| 174 | + | |
| 175 | + | |
| 176 | + /* | |
| 177 | + * Well ... hello_request messages are _never_ hashed since we can't | |
| 178 | + * know when they'd appear in the sequence. | |
| 179 | + */ | |
| 180 | + void ignore(int bytes) { | |
| 181 | + if (bytes > 0) { | |
| 182 | + pos += bytes; | |
| 183 | + lastHashed = pos; | |
| 184 | + } | |
| 185 | + } | |
| 186 | + | |
| 187 | + /* | |
| 188 | + * We hash the (plaintext) we've processed, but only on demand. | |
| 189 | + * | |
| 190 | + * There is one place where we want to access the hash in the middle | |
| 191 | + * of a record: client cert message gets hashed, and part of the | |
| 192 | + * same record is the client cert verify message which uses that hash. | |
| 193 | + * So we track how much we've read and hashed. | |
| 194 | + */ | |
| 195 | + void doHashes() { | |
| 196 | + int len = pos - lastHashed; | |
| 197 | + | |
| 198 | + if (len > 0) { | |
| 199 | + hashInternal(buf, lastHashed, len); | |
| 200 | + lastHashed = pos; | |
| 201 | + } | |
| 202 | + } | |
| 203 | + | |
| 204 | + /* | |
| 205 | + * Need a helper function so we can hash the V2 hello correctly | |
| 206 | + */ | |
| 207 | + private void hashInternal(byte databuf [], int offset, int len) { | |
| 208 | + if (debug != null && Debug.isOn("data")) { | |
| 209 | + try { | |
| 210 | + HexDumpEncoder hd = new HexDumpEncoder(); | |
| 211 | + | |
| 212 | + System.out.println("[read] MD5 and SHA1 hashes: len = " | |
| 213 | + + len); | |
| 214 | + hd.encodeBuffer(new ByteArrayInputStream(databuf, offset, len), | |
| 215 | + System.out); | |
| 216 | + } catch (IOException e) { } | |
| 217 | + } | |
| 218 | + handshakeHash.update(databuf, offset, len); | |
| 219 | + } | |
| 220 | + | |
| 221 | + | |
| 222 | + /* | |
| 223 | + * Handshake messages may cross record boundaries. We "queue" | |
| 224 | + * these in big buffers if we need to cope with this problem. | |
| 225 | + * This is not anticipated to be a common case; if this turns | |
| 226 | + * out to be wrong, this can readily be sped up. | |
| 227 | + */ | |
| 228 | + void queueHandshake(InputRecord r) throws IOException { | |
| 229 | + int len; | |
| 230 | + | |
| 231 | + /* | |
| 232 | + * Hash any data that's read but unhashed. | |
| 233 | + */ | |
| 234 | + doHashes(); | |
| 235 | + | |
| 236 | + /* | |
| 237 | + * Move any unread data to the front of the buffer, | |
| 238 | + * flagging it all as unhashed. | |
| 239 | + */ | |
| 240 | + if (pos > headerSize) { | |
| 241 | + len = count - pos; | |
| 242 | + if (len != 0) { | |
| 243 | + System.arraycopy(buf, pos, buf, headerSize, len); | |
| 244 | + } | |
| 245 | + pos = headerSize; | |
| 246 | + lastHashed = pos; | |
| 247 | + count = headerSize + len; | |
| 248 | + } | |
| 249 | + | |
| 250 | + /* | |
| 251 | + * Grow "buf" if needed | |
| 252 | + */ | |
| 253 | + len = r.available() + count; | |
| 254 | + if (buf.length < len) { | |
| 255 | + byte newbuf []; | |
| 256 | + | |
| 257 | + newbuf = new byte [len]; | |
| 258 | + System.arraycopy(buf, 0, newbuf, 0, count); | |
| 259 | + buf = newbuf; | |
| 260 | + } | |
| 261 | + | |
| 262 | + /* | |
| 263 | + * Append the new buffer to this one. | |
| 264 | + */ | |
| 265 | + System.arraycopy(r.buf, r.pos, buf, count, len - count); | |
| 266 | + count = len; | |
| 267 | + | |
| 268 | + /* | |
| 269 | + * Adjust lastHashed; important for now with clients which | |
| 270 | + * send SSL V2 client hellos. This will go away eventually, | |
| 271 | + * by buffer code cleanup. | |
| 272 | + */ | |
| 273 | + len = r.lastHashed - r.pos; | |
| 274 | + if (pos == headerSize) { | |
| 275 | + lastHashed += len; | |
| 276 | + } else { | |
| 277 | + throw new SSLProtocolException("?? confused buffer hashing ??"); | |
| 278 | + } | |
| 279 | + // we've read the record, advance the pointers | |
| 280 | + r.pos = r.count; | |
| 281 | + } | |
| 282 | + | |
| 283 | + | |
| 284 | + /** | |
| 285 | + * Prevent any more data from being read into this record, | |
| 286 | + * and flag the record as holding no data. | |
| 287 | + */ | |
| 288 | + public void close() { | |
| 289 | + appDataValid = false; | |
| 290 | + isClosed = true; | |
| 291 | + mark = 0; | |
| 292 | + pos = 0; | |
| 293 | + count = 0; | |
| 294 | + } | |
| 295 | + | |
| 296 | + | |
| 297 | + /* | |
| 298 | + * We may need to send this SSL v2 "No Cipher" message back, if we | |
| 299 | + * are faced with an SSLv2 "hello" that's not saying "I talk v3". | |
| 300 | + * It's the only one documented in the V2 spec as a fatal error. | |
| 301 | + */ | |
| 302 | + private static final byte[] v2NoCipher = { | |
| 303 | + (byte)0x80, (byte)0x03, // unpadded 3 byte record | |
| 304 | + (byte)0x00, // ... error message | |
| 305 | + (byte)0x00, (byte)0x01 // ... NO_CIPHER error | |
| 306 | + }; | |
| 307 | + | |
| 308 | + private int readFully(InputStream s, byte b[], int off, int len) | |
| 309 | + throws IOException { | |
| 310 | + int n = 0; | |
| 311 | + while (n < len) { | |
| 312 | + int readLen = s.read(b, off + n, len - n); | |
| 313 | + if (readLen < 0) { | |
| 314 | + return readLen; | |
| 315 | + } | |
| 316 | + | |
| 317 | + if (debug != null && Debug.isOn("packet")) { | |
| 318 | + try { | |
| 319 | + HexDumpEncoder hd = new HexDumpEncoder(); | |
| 320 | + ByteBuffer bb = ByteBuffer.wrap(b, off + n, readLen); | |
| 321 | + | |
| 322 | + System.out.println("[Raw read]: length = " + | |
| 323 | + bb.remaining()); | |
| 324 | + hd.encodeBuffer(bb, System.out); | |
| 325 | + } catch (IOException e) { } | |
| 326 | + } | |
| 327 | + | |
| 328 | + n += readLen; | |
| 329 | + exlen += readLen; | |
| 330 | + } | |
| 331 | + | |
| 332 | + return n; | |
| 333 | + } | |
| 334 | + | |
| 335 | + /* | |
| 336 | + * Read the SSL V3 record ... first time around, check to see if it | |
| 337 | + * really IS a V3 record. Handle SSL V2 clients which can talk V3.0, | |
| 338 | + * as well as real V3 record format; otherwise report an error. | |
| 339 | + */ | |
| 340 | + void read(InputStream s, OutputStream o) throws IOException { | |
| 341 | + if (isClosed) { | |
| 342 | + return; | |
| 343 | + } | |
| 344 | + | |
| 345 | + /* | |
| 346 | + * For SSL it really _is_ an error if the other end went away | |
| 347 | + * so ungracefully as to not shut down cleanly. | |
| 348 | + */ | |
| 349 | + if(exlen < headerSize) { | |
| 350 | + int really = readFully(s, buf, exlen, headerSize - exlen); | |
| 351 | + if (really < 0) { | |
| 352 | + throw new EOFException("SSL peer shut down incorrectly"); | |
| 353 | + } | |
| 354 | + | |
| 355 | + pos = headerSize; | |
| 356 | + count = headerSize; | |
| 357 | + lastHashed = pos; | |
| 358 | + } | |
| 359 | + | |
| 360 | + /* | |
| 361 | + * The first record might use some other record marking convention, | |
| 362 | + * typically SSL v2 header. (PCT could also be detected here.) | |
| 363 | + * This case is currently common -- Navigator 3.0 usually works | |
| 364 | + * this way, as do IE 3.0 and other products. | |
| 365 | + */ | |
| 366 | + if (!formatVerified) { | |
| 367 | + formatVerified = true; | |
| 368 | + /* | |
| 369 | + * The first record must either be a handshake record or an | |
| 370 | + * alert message. If it's not, it is either invalid or an | |
| 371 | + * SSLv2 message. | |
| 372 | + */ | |
| 373 | + if (buf[0] != ct_handshake && buf[0] != ct_alert) { | |
| 374 | + handleUnknownRecord(s, o); | |
| 375 | + } else { | |
| 376 | + readV3Record(s, o); | |
| 377 | + } | |
| 378 | + } else { // formatVerified == true | |
| 379 | + readV3Record(s, o); | |
| 380 | + } | |
| 381 | + } | |
| 382 | + | |
| 383 | + /** | |
| 384 | + * Read a SSL/TLS record. Throw an IOException if the format is invalid. | |
| 385 | + */ | |
| 386 | + private void readV3Record(InputStream s, OutputStream o) | |
| 387 | + throws IOException { | |
| 388 | + ProtocolVersion recordVersion = ProtocolVersion.valueOf(buf[1], buf[2]); | |
| 389 | + // Check if too old (currently not possible) | |
| 390 | + // or if the major version does not match. | |
| 391 | + // The actual version negotiation is in the handshaker classes | |
| 392 | + if ((recordVersion.v < ProtocolVersion.MIN.v) | |
| 393 | + || (recordVersion.major > ProtocolVersion.MAX.major)) { | |
| 394 | + throw new SSLException( | |
| 395 | + "Unsupported record version " + recordVersion); | |
| 396 | + } | |
| 397 | + | |
| 398 | + /* | |
| 399 | + * Get and check length, then the data. | |
| 400 | + */ | |
| 401 | + int contentLen = ((buf[3] & 0x0ff) << 8) + (buf[4] & 0xff); | |
| 402 | + | |
| 403 | + /* | |
| 404 | + * Check for upper bound. | |
| 405 | + */ | |
| 406 | + if (contentLen < 0 || contentLen > maxLargeRecordSize - headerSize) { | |
| 407 | + throw new SSLProtocolException("Bad InputRecord size" | |
| 408 | + + ", count = " + contentLen | |
| 409 | + + ", buf.length = " + buf.length); | |
| 410 | + } | |
| 411 | + | |
| 412 | + /* | |
| 413 | + * Grow "buf" if needed. Since buf is maxRecordSize by default, | |
| 414 | + * this only occurs when we receive records which violate the | |
| 415 | + * SSL specification. This is a workaround for a Microsoft SSL bug. | |
| 416 | + */ | |
| 417 | + if (contentLen > buf.length - headerSize) { | |
| 418 | + byte[] newbuf = new byte[contentLen + headerSize]; | |
| 419 | + System.arraycopy(buf, 0, newbuf, 0, headerSize); | |
| 420 | + buf = newbuf; | |
| 421 | + } | |
| 422 | + | |
| 423 | + if (exlen < contentLen + headerSize) { | |
| 424 | + int really = readFully( | |
| 425 | + s, buf, exlen, contentLen + headerSize - exlen); | |
| 426 | + if (really < 0) { | |
| 427 | + throw new SSLException("SSL peer shut down incorrectly"); | |
| 428 | + } | |
| 429 | + } | |
| 430 | + | |
| 431 | + // now we've got a complete record. | |
| 432 | + count = contentLen + headerSize; | |
| 433 | + exlen = 0; | |
| 434 | + | |
| 435 | + if (debug != null && Debug.isOn("record")) { | |
| 436 | + if (count < 0 || count > (maxRecordSize - headerSize)) { | |
| 437 | + System.out.println(Thread.currentThread().getName() | |
| 438 | + + ", Bad InputRecord size" + ", count = " + count); | |
| 439 | + } | |
| 440 | + System.out.println(Thread.currentThread().getName() | |
| 441 | + + ", READ: " + recordVersion + " " | |
| 442 | + + contentName(contentType()) + ", length = " + available()); | |
| 443 | + } | |
| 444 | + /* | |
| 445 | + * then caller decrypts, verifies, and uncompresses | |
| 446 | + */ | |
| 447 | + } | |
| 448 | + | |
| 449 | + /** | |
| 450 | + * Deal with unknown records. Called if the first data we read on this | |
| 451 | + * connection does not look like an SSL/TLS record. It could a SSLv2 | |
| 452 | + * message, or just garbage. | |
| 453 | + */ | |
| 454 | + private void handleUnknownRecord(InputStream s, OutputStream o) | |
| 455 | + throws IOException { | |
| 456 | + /* | |
| 457 | + * No? Oh well; does it look like a V2 "ClientHello"? | |
| 458 | + * That'd be an unpadded handshake message; we don't | |
| 459 | + * bother checking length just now. | |
| 460 | + */ | |
| 461 | + if (((buf[0] & 0x080) != 0) && buf[2] == 1) { | |
| 462 | + /* | |
| 463 | + * if the user has disabled SSLv2Hello (using | |
| 464 | + * setEnabledProtocol) then throw an | |
| 465 | + * exception | |
| 466 | + */ | |
| 467 | + if (helloVersion != ProtocolVersion.SSL20Hello) { | |
| 468 | + throw new SSLHandshakeException("SSLv2Hello is disabled"); | |
| 469 | + } | |
| 470 | + | |
| 471 | + ProtocolVersion recordVersion = | |
| 472 | + ProtocolVersion.valueOf(buf[3], buf[4]); | |
| 473 | + | |
| 474 | + if (recordVersion == ProtocolVersion.SSL20Hello) { | |
| 475 | + /* | |
| 476 | + * Looks like a V2 client hello, but not one saying | |
| 477 | + * "let's talk SSLv3". So we send an SSLv2 error | |
| 478 | + * message, one that's treated as fatal by clients. | |
| 479 | + * (Otherwise we'll hang.) | |
| 480 | + */ | |
| 481 | + try { | |
| 482 | + writeBuffer(o, v2NoCipher, 0, v2NoCipher.length); | |
| 483 | + } catch (Exception e) { | |
| 484 | + /* NOTHING */ | |
| 485 | + } | |
| 486 | + throw new SSLException("Unsupported SSL v2.0 ClientHello"); | |
| 487 | + } | |
| 488 | + | |
| 489 | + /* | |
| 490 | + * If we can map this into a V3 ClientHello, read and | |
| 491 | + * hash the rest of the V2 handshake, turn it into a | |
| 492 | + * V3 ClientHello message, and pass it up. | |
| 493 | + */ | |
| 494 | + int len = ((buf[0] & 0x7f) << 8) + | |
| 495 | + (buf[1] & 0xff) - 3; | |
| 496 | + if (v2Buf == null) { | |
| 497 | + v2Buf = new byte[len]; | |
| 498 | + } | |
| 499 | + if (exlen < len + headerSize) { | |
| 500 | + int really = readFully( | |
| 501 | + s, v2Buf, exlen - headerSize, len + headerSize - exlen); | |
| 502 | + if (really < 0) { | |
| 503 | + throw new EOFException("SSL peer shut down incorrectly"); | |
| 504 | + } | |
| 505 | + } | |
| 506 | + | |
| 507 | + // now we've got a complete record. | |
| 508 | + exlen = 0; | |
| 509 | + | |
| 510 | + hashInternal(buf, 2, 3); | |
| 511 | + hashInternal(v2Buf, 0, len); | |
| 512 | + V2toV3ClientHello(v2Buf); | |
| 513 | + v2Buf = null; | |
| 514 | + lastHashed = count; | |
| 515 | + | |
| 516 | + if (debug != null && Debug.isOn("record")) { | |
| 517 | + System.out.println( | |
| 518 | + Thread.currentThread().getName() | |
| 519 | + + ", READ: SSL v2, contentType = " | |
| 520 | + + contentName(contentType()) | |
| 521 | + + ", translated length = " + available()); | |
| 522 | + } | |
| 523 | + return; | |
| 524 | + | |
| 525 | + } else { | |
| 526 | + /* | |
| 527 | + * Does it look like a V2 "ServerHello"? | |
| 528 | + */ | |
| 529 | + if (((buf [0] & 0x080) != 0) && buf [2] == 4) { | |
| 530 | + throw new SSLException( | |
| 531 | + "SSL V2.0 servers are not supported."); | |
| 532 | + } | |
| 533 | + | |
| 534 | + /* | |
| 535 | + * If this is a V2 NoCipher message then this means | |
| 536 | + * the other server doesn't support V3. Otherwise, we just | |
| 537 | + * don't understand what it's saying. | |
| 538 | + */ | |
| 539 | + for (int i = 0; i < v2NoCipher.length; i++) { | |
| 540 | + if (buf[i] != v2NoCipher[i]) { | |
| 541 | + throw new SSLException( | |
| 542 | + "Unrecognized SSL message, plaintext connection?"); | |
| 543 | + } | |
| 544 | + } | |
| 545 | + | |
| 546 | + throw new SSLException("SSL V2.0 servers are not supported."); | |
| 547 | + } | |
| 548 | + } | |
| 549 | + | |
| 550 | + /* | |
| 551 | + * Actually do the write here. For SSLEngine's HS data, | |
| 552 | + * we'll override this method and let it take the appropriate | |
| 553 | + * action. | |
| 554 | + */ | |
| 555 | + void writeBuffer(OutputStream s, byte [] buf, int off, int len) | |
| 556 | + throws IOException { | |
| 557 | + s.write(buf, 0, len); | |
| 558 | + s.flush(); | |
| 559 | + } | |
| 560 | + | |
| 561 | + /* | |
| 562 | + * Support "old" clients which are capable of SSL V3.0 protocol ... for | |
| 563 | + * example, Navigator 3.0 clients. The V2 message is in the header and | |
| 564 | + * the bytes passed as parameter. This routine translates the V2 message | |
| 565 | + * into an equivalent V3 one. | |
| 566 | + */ | |
| 567 | + private void V2toV3ClientHello(byte v2Msg []) throws SSLException | |
| 568 | + { | |
| 569 | + int i; | |
| 570 | + | |
| 571 | + /* | |
| 572 | + * Build the first part of the V3 record header from the V2 one | |
| 573 | + * that's now buffered up. (Lengths are fixed up later). | |
| 574 | + */ | |
| 575 | + buf [0] = ct_handshake; | |
| 576 | + buf [1] = buf [3]; // V3.x | |
| 577 | + buf[2] = buf[4]; | |
| 578 | + // header [3..4] for handshake message length | |
| 579 | + // count = 5; | |
| 580 | + | |
| 581 | + /* | |
| 582 | + * Store the generic V3 handshake header: 4 bytes | |
| 583 | + */ | |
| 584 | + buf [5] = 1; // HandshakeMessage.ht_client_hello | |
| 585 | + // buf [6..8] for length of ClientHello (int24) | |
| 586 | + // count += 4; | |
| 587 | + | |
| 588 | + /* | |
| 589 | + * ClientHello header starts with SSL version | |
| 590 | + */ | |
| 591 | + buf [9] = buf [1]; | |
| 592 | + buf [10] = buf [2]; | |
| 593 | + // count += 2; | |
| 594 | + count = 11; | |
| 595 | + | |
| 596 | + /* | |
| 597 | + * Start parsing the V2 message ... | |
| 598 | + */ | |
| 599 | + int cipherSpecLen, sessionIdLen, nonceLen; | |
| 600 | + | |
| 601 | + cipherSpecLen = ((v2Msg [0] & 0xff) << 8) + (v2Msg [1] & 0xff); | |
| 602 | + sessionIdLen = ((v2Msg [2] & 0xff) << 8) + (v2Msg [3] & 0xff); | |
| 603 | + nonceLen = ((v2Msg [4] & 0xff) << 8) + (v2Msg [5] & 0xff); | |
| 604 | + | |
| 605 | + /* | |
| 606 | + * Copy Random value/nonce ... if less than the 32 bytes of | |
| 607 | + * a V3 "Random", right justify and zero pad to the left. Else | |
| 608 | + * just take the last 32 bytes. | |
| 609 | + */ | |
| 610 | + int offset = 6 + cipherSpecLen + sessionIdLen; | |
| 611 | + | |
| 612 | + if (nonceLen < 32) { | |
| 613 | + for (i = 0; i < (32 - nonceLen); i++) | |
| 614 | + buf [count++] = 0; | |
| 615 | + System.arraycopy(v2Msg, offset, buf, count, nonceLen); | |
| 616 | + count += nonceLen; | |
| 617 | + } else { | |
| 618 | + System.arraycopy(v2Msg, offset + (nonceLen - 32), | |
| 619 | + buf, count, 32); | |
| 620 | + count += 32; | |
| 621 | + } | |
| 622 | + | |
| 623 | + /* | |
| 624 | + * Copy Session ID (only one byte length!) | |
| 625 | + */ | |
| 626 | + offset -= sessionIdLen; | |
| 627 | + buf [count++] = (byte) sessionIdLen; | |
| 628 | + | |
| 629 | + System.arraycopy(v2Msg, offset, buf, count, sessionIdLen); | |
| 630 | + count += sessionIdLen; | |
| 631 | + | |
| 632 | + /* | |
| 633 | + * Copy and translate cipher suites ... V2 specs with first byte zero | |
| 634 | + * are really V3 specs (in the last 2 bytes), just copy those and drop | |
| 635 | + * the other ones. Preference order remains unchanged. | |
| 636 | + * | |
| 637 | + * Example: Netscape Navigator 3.0 (exportable) says: | |
| 638 | + * | |
| 639 | + * 0/3, SSL_RSA_EXPORT_WITH_RC4_40_MD5 | |
| 640 | + * 0/6, SSL_RSA_EXPORT_WITH_RC2_CBC_40_MD5 | |
| 641 | + * | |
| 642 | + * Microsoft Internet Explorer 3.0 (exportable) supports only | |
| 643 | + * | |
| 644 | + * 0/3, SSL_RSA_EXPORT_WITH_RC4_40_MD5 | |
| 645 | + */ | |
| 646 | + int j; | |
| 647 | + | |
| 648 | + offset -= cipherSpecLen; | |
| 649 | + j = count + 2; | |
| 650 | + | |
| 651 | + for (i = 0; i < cipherSpecLen; i += 3) { | |
| 652 | + if (v2Msg [offset + i] != 0) | |
| 653 | + continue; | |
| 654 | + buf [j++] = v2Msg [offset + i + 1]; | |
| 655 | + buf [j++] = v2Msg [offset + i + 2]; | |
| 656 | + } | |
| 657 | + | |
| 658 | + j -= count + 2; | |
| 659 | + buf [count++] = (byte) (j >>> 8); | |
| 660 | + buf [count++] = (byte) j; | |
| 661 | + count += j; | |
| 662 | + | |
| 663 | + /* | |
| 664 | + * Append compression methods (default/null only) | |
| 665 | + */ | |
| 666 | + buf [count++] = 1; | |
| 667 | + buf [count++] = 0; // Session.compression_null | |
| 668 | + | |
| 669 | + /* | |
| 670 | + * Fill in lengths of the messages we synthesized (nested: | |
| 671 | + * V3 handshake message within V3 record) and then return | |
| 672 | + */ | |
| 673 | + buf [3] = (byte) (count - headerSize); | |
| 674 | + buf [4] = (byte) ((count - headerSize) >>> 8); | |
| 675 | + | |
| 676 | + buf [headerSize + 1] = 0; | |
| 677 | + buf [headerSize + 2] = (byte) (((count - headerSize) - 4) >>> 8); | |
| 678 | + buf [headerSize + 3] = (byte) ((count - headerSize) - 4); | |
| 679 | + | |
| 680 | + pos = headerSize; | |
| 681 | + } | |
| 682 | + | |
| 683 | + /** | |
| 684 | + * Return a description for the given content type. This method should be | |
| 685 | + * in Record, but since that is an interface this is not possible. | |
| 686 | + * Called from InputRecord and OutputRecord. | |
| 687 | + */ | |
| 688 | + static String contentName(int contentType) { | |
| 689 | + switch (contentType) { | |
| 690 | + case ct_change_cipher_spec: | |
| 691 | + return "Change Cipher Spec"; | |
| 692 | + case ct_alert: | |
| 693 | + return "Alert"; | |
| 694 | + case ct_handshake: | |
| 695 | + return "Handshake"; | |
| 696 | + case ct_application_data: | |
| 697 | + return "Application Data"; | |
| 698 | + default: | |
| 699 | + return "contentType = " + contentType; | |
| 700 | + } | |
| 701 | + } | |
| 702 | + | |
| 703 | +} | |