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| 1 /* | |
| 2 * This file implements the CLIENT Session ID cache. | |
| 3 * | |
| 4 * This Source Code Form is subject to the terms of the Mozilla Public | |
| 5 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 6 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 7 | |
| 8 #include "cert.h" | |
| 9 #include "pk11pub.h" | |
| 10 #include "secitem.h" | |
| 11 #include "ssl.h" | |
| 12 #include "nss.h" | |
| 13 | |
| 14 #include "sslimpl.h" | |
| 15 #include "sslproto.h" | |
| 16 #include "nssilock.h" | |
| 17 #if defined(XP_UNIX) || defined(XP_WIN) || defined(_WINDOWS) || defined(XP_BEOS) | |
| 18 #include <time.h> | |
| 19 #endif | |
| 20 | |
| 21 PRUint32 ssl_sid_timeout = 100; | |
| 22 PRUint32 ssl3_sid_timeout = 86400L; /* 24 hours */ | |
| 23 | |
| 24 static sslSessionID *cache = NULL; | |
| 25 static PZLock * cacheLock = NULL; | |
| 26 | |
| 27 /* sids can be in one of 4 states: | |
| 28 * | |
| 29 * never_cached, created, but not yet put into cache. | |
| 30 * in_client_cache, in the client cache's linked list. | |
| 31 * in_server_cache, entry came from the server's cache file. | |
| 32 * invalid_cache has been removed from the cache. | |
| 33 */ | |
| 34 | |
| 35 #define LOCK_CACHE lock_cache() | |
| 36 #define UNLOCK_CACHE PZ_Unlock(cacheLock) | |
| 37 | |
| 38 static PRCallOnceType lockOnce; | |
| 39 | |
| 40 /* FreeSessionCacheLocks is a callback from NSS_RegisterShutdown which destroys | |
| 41 * the session cache locks on shutdown and resets them to their initial | |
| 42 * state. */ | |
| 43 static SECStatus | |
| 44 FreeSessionCacheLocks(void* appData, void* nssData) | |
| 45 { | |
| 46 static const PRCallOnceType pristineCallOnce; | |
| 47 SECStatus rv; | |
| 48 | |
| 49 if (!cacheLock) { | |
| 50 PORT_SetError(SEC_ERROR_NOT_INITIALIZED); | |
| 51 return SECFailure; | |
| 52 } | |
| 53 | |
| 54 PZ_DestroyLock(cacheLock); | |
| 55 cacheLock = NULL; | |
| 56 | |
| 57 rv = ssl_FreeSymWrapKeysLock(); | |
| 58 if (rv != SECSuccess) { | |
| 59 return rv; | |
| 60 } | |
| 61 | |
| 62 lockOnce = pristineCallOnce; | |
| 63 return SECSuccess; | |
| 64 } | |
| 65 | |
| 66 /* InitSessionCacheLocks is called, protected by lockOnce, to create the | |
| 67 * session cache locks. */ | |
| 68 static PRStatus | |
| 69 InitSessionCacheLocks(void) | |
| 70 { | |
| 71 SECStatus rv; | |
| 72 | |
| 73 cacheLock = PZ_NewLock(nssILockCache); | |
| 74 if (cacheLock == NULL) { | |
| 75 return PR_FAILURE; | |
| 76 } | |
| 77 rv = ssl_InitSymWrapKeysLock(); | |
| 78 if (rv != SECSuccess) { | |
| 79 PRErrorCode error = PORT_GetError(); | |
| 80 PZ_DestroyLock(cacheLock); | |
| 81 cacheLock = NULL; | |
| 82 PORT_SetError(error); | |
| 83 return PR_FAILURE; | |
| 84 } | |
| 85 | |
| 86 rv = NSS_RegisterShutdown(FreeSessionCacheLocks, NULL); | |
| 87 PORT_Assert(SECSuccess == rv); | |
| 88 if (SECSuccess != rv) { | |
| 89 return PR_FAILURE; | |
| 90 } | |
| 91 return PR_SUCCESS; | |
| 92 } | |
| 93 | |
| 94 SECStatus | |
| 95 ssl_InitSessionCacheLocks(void) | |
| 96 { | |
| 97 return (PR_SUCCESS == | |
| 98 PR_CallOnce(&lockOnce, InitSessionCacheLocks)) ? | |
| 99 SECSuccess : SECFailure; | |
| 100 } | |
| 101 | |
| 102 static void | |
| 103 lock_cache(void) | |
| 104 { | |
| 105 ssl_InitSessionCacheLocks(); | |
| 106 PZ_Lock(cacheLock); | |
| 107 } | |
| 108 | |
| 109 /* BEWARE: This function gets called for both client and server SIDs !! | |
| 110 * If the unreferenced sid is not in the cache, Free sid and its contents. | |
| 111 */ | |
| 112 static void | |
| 113 ssl_DestroySID(sslSessionID *sid) | |
| 114 { | |
| 115 int i; | |
| 116 SSL_TRC(8, ("SSL: destroy sid: sid=0x%x cached=%d", sid, sid->cached)); | |
| 117 PORT_Assert(sid->references == 0); | |
| 118 PORT_Assert(sid->cached != in_client_cache); | |
| 119 | |
| 120 if (sid->version < SSL_LIBRARY_VERSION_3_0) { | |
| 121 SECITEM_ZfreeItem(&sid->u.ssl2.masterKey, PR_FALSE); | |
| 122 SECITEM_ZfreeItem(&sid->u.ssl2.cipherArg, PR_FALSE); | |
| 123 } else { | |
| 124 if (sid->u.ssl3.locked.sessionTicket.ticket.data) { | |
| 125 SECITEM_FreeItem(&sid->u.ssl3.locked.sessionTicket.ticket, | |
| 126 PR_FALSE); | |
| 127 } | |
| 128 if (sid->u.ssl3.srvName.data) { | |
| 129 SECITEM_FreeItem(&sid->u.ssl3.srvName, PR_FALSE); | |
| 130 } | |
| 131 if (sid->u.ssl3.originalHandshakeHash.data) { | |
| 132 SECITEM_FreeItem(&sid->u.ssl3.originalHandshakeHash, PR_FALSE); | |
| 133 } | |
| 134 if (sid->u.ssl3.signedCertTimestamps.data) { | |
| 135 SECITEM_FreeItem(&sid->u.ssl3.signedCertTimestamps, PR_FALSE); | |
| 136 } | |
| 137 | |
| 138 if (sid->u.ssl3.lock) { | |
| 139 NSSRWLock_Destroy(sid->u.ssl3.lock); | |
| 140 } | |
| 141 } | |
| 142 | |
| 143 if (sid->peerID != NULL) | |
| 144 PORT_Free((void *)sid->peerID); /* CONST */ | |
| 145 | |
| 146 if (sid->urlSvrName != NULL) | |
| 147 PORT_Free((void *)sid->urlSvrName); /* CONST */ | |
| 148 | |
| 149 if ( sid->peerCert ) { | |
| 150 CERT_DestroyCertificate(sid->peerCert); | |
| 151 } | |
| 152 for (i = 0; i < MAX_PEER_CERT_CHAIN_SIZE && sid->peerCertChain[i]; i++) { | |
| 153 CERT_DestroyCertificate(sid->peerCertChain[i]); | |
| 154 } | |
| 155 if (sid->peerCertStatus.items) { | |
| 156 SECITEM_FreeArray(&sid->peerCertStatus, PR_FALSE); | |
| 157 } | |
| 158 | |
| 159 if ( sid->localCert ) { | |
| 160 CERT_DestroyCertificate(sid->localCert); | |
| 161 } | |
| 162 | |
| 163 PORT_ZFree(sid, sizeof(sslSessionID)); | |
| 164 } | |
| 165 | |
| 166 /* BEWARE: This function gets called for both client and server SIDs !! | |
| 167 * Decrement reference count, and | |
| 168 * free sid if ref count is zero, and sid is not in the cache. | |
| 169 * Does NOT remove from the cache first. | |
| 170 * If the sid is still in the cache, it is left there until next time | |
| 171 * the cache list is traversed. | |
| 172 */ | |
| 173 static void | |
| 174 ssl_FreeLockedSID(sslSessionID *sid) | |
| 175 { | |
| 176 PORT_Assert(sid->references >= 1); | |
| 177 if (--sid->references == 0) { | |
| 178 ssl_DestroySID(sid); | |
| 179 } | |
| 180 } | |
| 181 | |
| 182 /* BEWARE: This function gets called for both client and server SIDs !! | |
| 183 * Decrement reference count, and | |
| 184 * free sid if ref count is zero, and sid is not in the cache. | |
| 185 * Does NOT remove from the cache first. | |
| 186 * These locks are necessary because the sid _might_ be in the cache list. | |
| 187 */ | |
| 188 void | |
| 189 ssl_FreeSID(sslSessionID *sid) | |
| 190 { | |
| 191 LOCK_CACHE; | |
| 192 ssl_FreeLockedSID(sid); | |
| 193 UNLOCK_CACHE; | |
| 194 } | |
| 195 | |
| 196 /************************************************************************/ | |
| 197 | |
| 198 /* | |
| 199 ** Lookup sid entry in cache by Address, port, and peerID string. | |
| 200 ** If found, Increment reference count, and return pointer to caller. | |
| 201 ** If it has timed out or ref count is zero, remove from list and free it. | |
| 202 */ | |
| 203 | |
| 204 sslSessionID * | |
| 205 ssl_LookupSID(const PRIPv6Addr *addr, PRUint16 port, const char *peerID, | |
| 206 const char * urlSvrName) | |
| 207 { | |
| 208 sslSessionID **sidp; | |
| 209 sslSessionID * sid; | |
| 210 PRUint32 now; | |
| 211 | |
| 212 if (!urlSvrName) | |
| 213 return NULL; | |
| 214 now = ssl_Time(); | |
| 215 LOCK_CACHE; | |
| 216 sidp = &cache; | |
| 217 while ((sid = *sidp) != 0) { | |
| 218 PORT_Assert(sid->cached == in_client_cache); | |
| 219 PORT_Assert(sid->references >= 1); | |
| 220 | |
| 221 SSL_TRC(8, ("SSL: Lookup1: sid=0x%x", sid)); | |
| 222 | |
| 223 if (sid->expirationTime < now) { | |
| 224 /* | |
| 225 ** This session-id timed out. | |
| 226 ** Don't even care who it belongs to, blow it out of our cache. | |
| 227 */ | |
| 228 SSL_TRC(7, ("SSL: lookup1, throwing sid out, age=%d refs=%d", | |
| 229 now - sid->creationTime, sid->references)); | |
| 230 | |
| 231 *sidp = sid->next; /* delink it from the list. */ | |
| 232 sid->cached = invalid_cache; /* mark not on list. */ | |
| 233 ssl_FreeLockedSID(sid); /* drop ref count, free. */ | |
| 234 } else if (!memcmp(&sid->addr, addr, sizeof(PRIPv6Addr)) && /* server IP
addr matches */ | |
| 235 (sid->port == port) && /* server port matches */ | |
| 236 /* proxy (peerID) matches */ | |
| 237 (((peerID == NULL) && (sid->peerID == NULL)) || | |
| 238 ((peerID != NULL) && (sid->peerID != NULL) && | |
| 239 PORT_Strcmp(sid->peerID, peerID) == 0)) && | |
| 240 /* is cacheable */ | |
| 241 (sid->version < SSL_LIBRARY_VERSION_3_0 || | |
| 242 sid->u.ssl3.keys.resumable) && | |
| 243 /* server hostname matches. */ | |
| 244 (sid->urlSvrName != NULL) && | |
| 245 ((0 == PORT_Strcmp(urlSvrName, sid->urlSvrName)) || | |
| 246 ((sid->peerCert != NULL) && (SECSuccess == | |
| 247 CERT_VerifyCertName(sid->peerCert, urlSvrName))) ) | |
| 248 ) { | |
| 249 /* Hit */ | |
| 250 sid->lastAccessTime = now; | |
| 251 sid->references++; | |
| 252 break; | |
| 253 } else { | |
| 254 sidp = &sid->next; | |
| 255 } | |
| 256 } | |
| 257 UNLOCK_CACHE; | |
| 258 return sid; | |
| 259 } | |
| 260 | |
| 261 /* | |
| 262 ** Add an sid to the cache or return a previously cached entry to the cache. | |
| 263 ** Although this is static, it is called via ss->sec.cache(). | |
| 264 */ | |
| 265 static void | |
| 266 CacheSID(sslSessionID *sid) | |
| 267 { | |
| 268 PRUint32 expirationPeriod; | |
| 269 | |
| 270 PORT_Assert(sid->cached == never_cached); | |
| 271 | |
| 272 SSL_TRC(8, ("SSL: Cache: sid=0x%x cached=%d addr=0x%08x%08x%08x%08x port=0x%
04x " | |
| 273 "time=%x cached=%d", | |
| 274 sid, sid->cached, sid->addr.pr_s6_addr32[0], | |
| 275 sid->addr.pr_s6_addr32[1], sid->addr.pr_s6_addr32[2], | |
| 276 sid->addr.pr_s6_addr32[3], sid->port, sid->creationTime, | |
| 277 sid->cached)); | |
| 278 | |
| 279 if (!sid->urlSvrName) { | |
| 280 /* don't cache this SID because it can never be matched */ | |
| 281 return; | |
| 282 } | |
| 283 | |
| 284 /* XXX should be different trace for version 2 vs. version 3 */ | |
| 285 if (sid->version < SSL_LIBRARY_VERSION_3_0) { | |
| 286 expirationPeriod = ssl_sid_timeout; | |
| 287 PRINT_BUF(8, (0, "sessionID:", | |
| 288 sid->u.ssl2.sessionID, sizeof(sid->u.ssl2.sessionID))); | |
| 289 PRINT_BUF(8, (0, "masterKey:", | |
| 290 sid->u.ssl2.masterKey.data, sid->u.ssl2.masterKey.len)); | |
| 291 PRINT_BUF(8, (0, "cipherArg:", | |
| 292 sid->u.ssl2.cipherArg.data, sid->u.ssl2.cipherArg.len)); | |
| 293 } else { | |
| 294 if (sid->u.ssl3.sessionIDLength == 0 && | |
| 295 sid->u.ssl3.locked.sessionTicket.ticket.data == NULL) | |
| 296 return; | |
| 297 | |
| 298 /* Client generates the SessionID if this was a stateless resume. */ | |
| 299 if (sid->u.ssl3.sessionIDLength == 0) { | |
| 300 SECStatus rv; | |
| 301 rv = PK11_GenerateRandom(sid->u.ssl3.sessionID, | |
| 302 SSL3_SESSIONID_BYTES); | |
| 303 if (rv != SECSuccess) | |
| 304 return; | |
| 305 sid->u.ssl3.sessionIDLength = SSL3_SESSIONID_BYTES; | |
| 306 } | |
| 307 expirationPeriod = ssl3_sid_timeout; | |
| 308 PRINT_BUF(8, (0, "sessionID:", | |
| 309 sid->u.ssl3.sessionID, sid->u.ssl3.sessionIDLength)); | |
| 310 | |
| 311 sid->u.ssl3.lock = NSSRWLock_New(NSS_RWLOCK_RANK_NONE, NULL); | |
| 312 if (!sid->u.ssl3.lock) { | |
| 313 return; | |
| 314 } | |
| 315 } | |
| 316 PORT_Assert(sid->creationTime != 0 && sid->expirationTime != 0); | |
| 317 if (!sid->creationTime) | |
| 318 sid->lastAccessTime = sid->creationTime = ssl_Time(); | |
| 319 if (!sid->expirationTime) | |
| 320 sid->expirationTime = sid->creationTime + expirationPeriod; | |
| 321 | |
| 322 /* | |
| 323 * Put sid into the cache. Bump reference count to indicate that | |
| 324 * cache is holding a reference. Uncache will reduce the cache | |
| 325 * reference. | |
| 326 */ | |
| 327 LOCK_CACHE; | |
| 328 sid->references++; | |
| 329 sid->cached = in_client_cache; | |
| 330 sid->next = cache; | |
| 331 cache = sid; | |
| 332 UNLOCK_CACHE; | |
| 333 } | |
| 334 | |
| 335 /* | |
| 336 * If sid "zap" is in the cache, | |
| 337 * removes sid from cache, and decrements reference count. | |
| 338 * Caller must hold cache lock. | |
| 339 */ | |
| 340 static void | |
| 341 UncacheSID(sslSessionID *zap) | |
| 342 { | |
| 343 sslSessionID **sidp = &cache; | |
| 344 sslSessionID *sid; | |
| 345 | |
| 346 if (zap->cached != in_client_cache) { | |
| 347 return; | |
| 348 } | |
| 349 | |
| 350 SSL_TRC(8,("SSL: Uncache: zap=0x%x cached=%d addr=0x%08x%08x%08x%08x port=0x
%04x " | |
| 351 "time=%x cipher=%d", | |
| 352 zap, zap->cached, zap->addr.pr_s6_addr32[0], | |
| 353 zap->addr.pr_s6_addr32[1], zap->addr.pr_s6_addr32[2], | |
| 354 zap->addr.pr_s6_addr32[3], zap->port, zap->creationTime, | |
| 355 zap->u.ssl2.cipherType)); | |
| 356 if (zap->version < SSL_LIBRARY_VERSION_3_0) { | |
| 357 PRINT_BUF(8, (0, "sessionID:", | |
| 358 zap->u.ssl2.sessionID, sizeof(zap->u.ssl2.sessionID))); | |
| 359 PRINT_BUF(8, (0, "masterKey:", | |
| 360 zap->u.ssl2.masterKey.data, zap->u.ssl2.masterKey.len)); | |
| 361 PRINT_BUF(8, (0, "cipherArg:", | |
| 362 zap->u.ssl2.cipherArg.data, zap->u.ssl2.cipherArg.len)); | |
| 363 } | |
| 364 | |
| 365 /* See if it's in the cache, if so nuke it */ | |
| 366 while ((sid = *sidp) != 0) { | |
| 367 if (sid == zap) { | |
| 368 /* | |
| 369 ** Bingo. Reduce reference count by one so that when | |
| 370 ** everyone is done with the sid we can free it up. | |
| 371 */ | |
| 372 *sidp = zap->next; | |
| 373 zap->cached = invalid_cache; | |
| 374 ssl_FreeLockedSID(zap); | |
| 375 return; | |
| 376 } | |
| 377 sidp = &sid->next; | |
| 378 } | |
| 379 } | |
| 380 | |
| 381 /* If sid "zap" is in the cache, | |
| 382 * removes sid from cache, and decrements reference count. | |
| 383 * Although this function is static, it is called externally via | |
| 384 * ss->sec.uncache(). | |
| 385 */ | |
| 386 static void | |
| 387 LockAndUncacheSID(sslSessionID *zap) | |
| 388 { | |
| 389 LOCK_CACHE; | |
| 390 UncacheSID(zap); | |
| 391 UNLOCK_CACHE; | |
| 392 | |
| 393 } | |
| 394 | |
| 395 /* choose client or server cache functions for this sslsocket. */ | |
| 396 void | |
| 397 ssl_ChooseSessionIDProcs(sslSecurityInfo *sec) | |
| 398 { | |
| 399 if (sec->isServer) { | |
| 400 sec->cache = ssl_sid_cache; | |
| 401 sec->uncache = ssl_sid_uncache; | |
| 402 } else { | |
| 403 sec->cache = CacheSID; | |
| 404 sec->uncache = LockAndUncacheSID; | |
| 405 } | |
| 406 } | |
| 407 | |
| 408 /* wipe out the entire client session cache. */ | |
| 409 void | |
| 410 SSL_ClearSessionCache(void) | |
| 411 { | |
| 412 LOCK_CACHE; | |
| 413 while(cache != NULL) | |
| 414 UncacheSID(cache); | |
| 415 UNLOCK_CACHE; | |
| 416 } | |
| 417 | |
| 418 /* returns an unsigned int containing the number of seconds in PR_Now() */ | |
| 419 PRUint32 | |
| 420 ssl_Time(void) | |
| 421 { | |
| 422 PRUint32 myTime; | |
| 423 #if defined(XP_UNIX) || defined(XP_WIN) || defined(_WINDOWS) || defined(XP_BEOS) | |
| 424 myTime = time(NULL); /* accurate until the year 2038. */ | |
| 425 #else | |
| 426 /* portable, but possibly slower */ | |
| 427 PRTime now; | |
| 428 PRInt64 ll; | |
| 429 | |
| 430 now = PR_Now(); | |
| 431 LL_I2L(ll, 1000000L); | |
| 432 LL_DIV(now, now, ll); | |
| 433 LL_L2UI(myTime, now); | |
| 434 #endif | |
| 435 return myTime; | |
| 436 } | |
| 437 | |
| 438 void | |
| 439 ssl3_SetSIDSessionTicket(sslSessionID *sid, | |
| 440 /*in/out*/ NewSessionTicket *newSessionTicket) | |
| 441 { | |
| 442 PORT_Assert(sid); | |
| 443 PORT_Assert(newSessionTicket); | |
| 444 | |
| 445 /* if sid->u.ssl3.lock, we are updating an existing entry that is already | |
| 446 * cached or was once cached, so we need to acquire and release the write | |
| 447 * lock. Otherwise, this is a new session that isn't shared with anything | |
| 448 * yet, so no locking is needed. | |
| 449 */ | |
| 450 if (sid->u.ssl3.lock) { | |
| 451 NSSRWLock_LockWrite(sid->u.ssl3.lock); | |
| 452 | |
| 453 /* A server might have sent us an empty ticket, which has the | |
| 454 * effect of clearing the previously known ticket. | |
| 455 */ | |
| 456 if (sid->u.ssl3.locked.sessionTicket.ticket.data) { | |
| 457 SECITEM_FreeItem(&sid->u.ssl3.locked.sessionTicket.ticket, | |
| 458 PR_FALSE); | |
| 459 } | |
| 460 } | |
| 461 | |
| 462 PORT_Assert(!sid->u.ssl3.locked.sessionTicket.ticket.data); | |
| 463 | |
| 464 /* Do a shallow copy, moving the ticket data. */ | |
| 465 sid->u.ssl3.locked.sessionTicket = *newSessionTicket; | |
| 466 newSessionTicket->ticket.data = NULL; | |
| 467 newSessionTicket->ticket.len = 0; | |
| 468 | |
| 469 if (sid->u.ssl3.lock) { | |
| 470 NSSRWLock_UnlockWrite(sid->u.ssl3.lock); | |
| 471 } | |
| 472 } | |
| OLD | NEW |
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Chromium Code Reviews
Issue 992733002:
Remove //net (except for Android test stuff) and sdch (Closed)
Base URL: git@github.com:domokit/mojo.git@master