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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 | } | ||