Add m-esr52 at 52.6.0

1 files changed, 1990 insertions, 0 deletions

diff --git a/security/nss/lib/ssl/sslsnce.c b/security/nss/lib/ssl/sslsnce.c
new file mode 100644
index 000000000..4a4005c2d
--- /dev/null
+++ b/security/nss/lib/ssl/sslsnce.c
@@ -0,0 +1,1990 @@
+/* This file implements the SERVER Session ID cache.
+ * NOTE:  The contents of this file are NOT used by the client.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/* Note: ssl_FreeSID() in sslnonce.c gets used for both client and server
+ * cache sids!
+ *
+ * About record locking among different server processes:
+ *
+ * All processes that are part of the same conceptual server (serving on
+ * the same address and port) MUST share a common SSL session cache.
+ * This code makes the content of the shared cache accessible to all
+ * processes on the same "server".  This code works on Unix and Win32 only.
+ *
+ * We use NSPR anonymous shared memory and move data to & from shared memory.
+ * We must do explicit locking of the records for all reads and writes.
+ * The set of Cache entries are divided up into "sets" of 128 entries.
+ * Each set is protected by a lock.  There may be one or more sets protected
+ * by each lock.  That is, locks to sets are 1:N.
+ * There is one lock for the entire cert cache.
+ * There is one lock for the set of wrapped sym wrap keys.
+ *
+ * The anonymous shared memory is laid out as if it were declared like this:
+ *
+ * struct {
+ *     cacheDescriptor          desc;
+ *     sidCacheLock             sidCacheLocks[ numSIDCacheLocks];
+ *     sidCacheLock             keyCacheLock;
+ *     sidCacheLock             certCacheLock;
+ *     sidCacheSet              sidCacheSets[ numSIDCacheSets ];
+ *     sidCacheEntry            sidCacheData[ numSIDCacheEntries];
+ *     certCacheEntry           certCacheData[numCertCacheEntries];
+ *     SSLWrappedSymWrappingKey keyCacheData[ssl_auth_size][SSL_NUM_WRAP_MECHS];
+ *     PRUint8                  keyNameSuffix[SESS_TICKET_KEY_VAR_NAME_LEN]
+ *     encKeyCacheEntry         ticketEncKey; // Wrapped
+ *     encKeyCacheEntry         ticketMacKey; // Wrapped
+ *     PRBool                   ticketKeysValid;
+ *     sidCacheLock             srvNameCacheLock;
+ *     srvNameCacheEntry        srvNameData[ numSrvNameCacheEntries ];
+ * } cacheMemCacheData;
+ */
+#include "seccomon.h"
+
+#if defined(XP_UNIX) || defined(XP_WIN32) || defined(XP_OS2) || defined(XP_BEOS)
+
+#include "cert.h"
+#include "ssl.h"
+#include "sslimpl.h"
+#include "sslproto.h"
+#include "pk11func.h"
+#include "base64.h"
+#include "keyhi.h"
+#include "blapit.h"
+#include "sechash.h"
+
+#include <stdio.h>
+
+#if defined(XP_UNIX) || defined(XP_BEOS)
+
+#include <syslog.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <errno.h>
+#include <signal.h>
+#include "unix_err.h"
+
+#else
+
+#ifdef XP_WIN32
+#include <wtypes.h>
+#include "win32err.h"
+#endif
+
+#endif
+#include <sys/types.h>
+
+#include "nspr.h"
+#include "sslmutex.h"
+
+/*
+** Format of a cache entry in the shared memory.
+*/
+struct sidCacheEntryStr {
+    /* 16 */ PRIPv6Addr addr; /* client's IP address */
+    /*  4 */ PRUint32 creationTime;
+    /*  4 */ PRUint32 lastAccessTime;
+    /*  4 */ PRUint32 expirationTime;
+    /*  2 */ PRUint16 version;
+    /*  1 */ PRUint8 valid;
+    /*  1 */ PRUint8 sessionIDLength;
+    /* 32 */ PRUint8 sessionID[SSL3_SESSIONID_BYTES];
+    /*  2 */ PRUint16 authType;
+    /*  2 */ PRUint16 authKeyBits;
+    /*  2 */ PRUint16 keaType;
+    /*  2 */ PRUint16 keaKeyBits;
+    /* 72  - common header total */
+
+    union {
+        struct {
+            /*  2 */ ssl3CipherSuite cipherSuite;
+            /*  2 */ PRUint16 compression; /* SSLCompressionMethod */
+
+            /* 54 */ ssl3SidKeys keys; /* keys, wrapped as needed. */
+
+            /*  4 */ PRUint32 masterWrapMech;
+            /*  4 */ PRInt32 certIndex;
+            /*  4 */ PRInt32 srvNameIndex;
+            /* 32 */ PRUint8 srvNameHash[SHA256_LENGTH]; /* SHA256 name hash */
+            /*  2 */ PRUint16 certTypeArgs;
+/*104 */} ssl3;
+
+/* force sizeof(sidCacheEntry) to be a multiple of cache line size */
+struct {
+    /*120 */ PRUint8 filler[120]; /* 72+120==192, a multiple of 16 */
+} forceSize;
+    } u;
+};
+typedef struct sidCacheEntryStr sidCacheEntry;
+
+/* The length of this struct is supposed to be a power of 2, e.g. 4KB */
+struct certCacheEntryStr {
+    PRUint16 certLength;                     /*    2 */
+    PRUint16 sessionIDLength;                /*    2 */
+    PRUint8 sessionID[SSL3_SESSIONID_BYTES]; /*   32 */
+    PRUint8 cert[SSL_MAX_CACHED_CERT_LEN];   /* 4060 */
+};                                           /* total   4096 */
+typedef struct certCacheEntryStr certCacheEntry;
+
+struct sidCacheLockStr {
+    PRUint32 timeStamp;
+    sslMutex mutex;
+    sslPID pid;
+};
+typedef struct sidCacheLockStr sidCacheLock;
+
+struct sidCacheSetStr {
+    PRIntn next;
+};
+typedef struct sidCacheSetStr sidCacheSet;
+
+struct encKeyCacheEntryStr {
+    PRUint8 bytes[512];
+    PRInt32 length;
+};
+typedef struct encKeyCacheEntryStr encKeyCacheEntry;
+
+#define SSL_MAX_DNS_HOST_NAME 1024
+
+struct srvNameCacheEntryStr {
+    PRUint16 type;                            /*    2 */
+    PRUint16 nameLen;                         /*    2 */
+    PRUint8 name[SSL_MAX_DNS_HOST_NAME + 12]; /* 1034 */
+    PRUint8 nameHash[SHA256_LENGTH];          /*   32 */
+                                              /* 1072 */
+};
+typedef struct srvNameCacheEntryStr srvNameCacheEntry;
+
+struct cacheDescStr {
+
+    PRUint32 cacheMemSize;
+
+    PRUint32 numSIDCacheLocks;
+    PRUint32 numSIDCacheSets;
+    PRUint32 numSIDCacheSetsPerLock;
+
+    PRUint32 numSIDCacheEntries;
+    PRUint32 sidCacheSize;
+
+    PRUint32 numCertCacheEntries;
+    PRUint32 certCacheSize;
+
+    PRUint32 numKeyCacheEntries;
+    PRUint32 keyCacheSize;
+
+    PRUint32 numSrvNameCacheEntries;
+    PRUint32 srvNameCacheSize;
+
+    PRUint32 ssl3Timeout;
+
+    PRUint32 numSIDCacheLocksInitialized;
+
+    /* These values are volatile, and are accessed through sharedCache-> */
+    PRUint32 nextCertCacheEntry; /* certCacheLock protects */
+    PRBool stopPolling;
+    PRBool everInherited;
+
+    /* The private copies of these values are pointers into shared mem */
+    /* The copies of these values in shared memory are merely offsets */
+    sidCacheLock *sidCacheLocks;
+    sidCacheLock *keyCacheLock;
+    sidCacheLock *certCacheLock;
+    sidCacheLock *srvNameCacheLock;
+    sidCacheSet *sidCacheSets;
+    sidCacheEntry *sidCacheData;
+    certCacheEntry *certCacheData;
+    SSLWrappedSymWrappingKey *keyCacheData;
+    PRUint8 *ticketKeyNameSuffix;
+    encKeyCacheEntry *ticketEncKey;
+    encKeyCacheEntry *ticketMacKey;
+    PRUint32 *ticketKeysValid;
+    srvNameCacheEntry *srvNameCacheData;
+
+    /* Only the private copies of these pointers are valid */
+    char *cacheMem;
+    struct cacheDescStr *sharedCache; /* shared copy of this struct */
+    PRFileMap *cacheMemMap;
+    PRThread *poller;
+    PRUint32 mutexTimeout;
+    PRBool shared;
+};
+typedef struct cacheDescStr cacheDesc;
+
+static cacheDesc globalCache;
+
+static const char envVarName[] = { SSL_ENV_VAR_NAME };
+
+static PRBool isMultiProcess = PR_FALSE;
+
+#define DEF_SID_CACHE_ENTRIES 10000
+#define DEF_CERT_CACHE_ENTRIES 250
+#define MIN_CERT_CACHE_ENTRIES 125 /* the effective size in old releases. */
+#define DEF_KEY_CACHE_ENTRIES 250
+#define DEF_NAME_CACHE_ENTRIES 1000
+
+#define SID_CACHE_ENTRIES_PER_SET 128
+#define SID_ALIGNMENT 16
+
+#define DEF_SSL3_TIMEOUT 86400L /* 24 hours */
+#define MAX_SSL3_TIMEOUT 86400L /* 24 hours */
+#define MIN_SSL3_TIMEOUT 5      /* seconds  */
+
+#if defined(AIX) || defined(LINUX) || defined(NETBSD) || defined(OPENBSD)
+#define MAX_SID_CACHE_LOCKS 8 /* two FDs per lock */
+#elif defined(OSF1)
+#define MAX_SID_CACHE_LOCKS 16 /* one FD per lock */
+#else
+#define MAX_SID_CACHE_LOCKS 256
+#endif
+
+#define SID_HOWMANY(val, size) (((val) + ((size)-1)) / (size))
+#define SID_ROUNDUP(val, size) ((size)*SID_HOWMANY((val), (size)))
+
+static sslPID myPid;
+static PRUint32 ssl_max_sid_cache_locks = MAX_SID_CACHE_LOCKS;
+
+/* forward static function declarations */
+static PRUint32 SIDindex(cacheDesc *cache, const PRIPv6Addr *addr, PRUint8 *s,
+                         unsigned nl);
+static SECStatus LaunchLockPoller(cacheDesc *cache);
+static SECStatus StopLockPoller(cacheDesc *cache);
+
+struct inheritanceStr {
+    PRUint32 cacheMemSize;
+    PRUint32 fmStrLen;
+};
+
+typedef struct inheritanceStr inheritance;
+
+#if defined(_WIN32) || defined(XP_OS2)
+
+#define DEFAULT_CACHE_DIRECTORY "\\temp"
+
+#endif /* _win32 */
+
+#if defined(XP_UNIX) || defined(XP_BEOS)
+
+#define DEFAULT_CACHE_DIRECTORY "/tmp"
+
+#endif /* XP_UNIX || XP_BEOS */
+
+/************************************************************************/
+
+static PRUint32
+LockSidCacheLock(sidCacheLock *lock, PRUint32 now)
+{
+    SECStatus rv = sslMutex_Lock(&lock->mutex);
+    if (rv != SECSuccess)
+        return 0;
+    if (!now)
+        now = ssl_Time();
+    lock->timeStamp = now;
+    lock->pid = myPid;
+    return now;
+}
+
+static SECStatus
+UnlockSidCacheLock(sidCacheLock *lock)
+{
+    SECStatus rv;
+
+    lock->pid = 0;
+    rv = sslMutex_Unlock(&lock->mutex);
+    return rv;
+}
+
+/* returns the value of ssl_Time on success, zero on failure. */
+static PRUint32
+LockSet(cacheDesc *cache, PRUint32 set, PRUint32 now)
+{
+    PRUint32 lockNum = set % cache->numSIDCacheLocks;
+    sidCacheLock *lock = cache->sidCacheLocks + lockNum;
+
+    return LockSidCacheLock(lock, now);
+}
+
+static SECStatus
+UnlockSet(cacheDesc *cache, PRUint32 set)
+{
+    PRUint32 lockNum = set % cache->numSIDCacheLocks;
+    sidCacheLock *lock = cache->sidCacheLocks + lockNum;
+
+    return UnlockSidCacheLock(lock);
+}
+
+/************************************************************************/
+
+/* Put a certificate in the cache.  Update the cert index in the sce.
+*/
+static PRUint32
+CacheCert(cacheDesc *cache, CERTCertificate *cert, sidCacheEntry *sce)
+{
+    PRUint32 now;
+    certCacheEntry cce;
+
+    if ((cert->derCert.len > SSL_MAX_CACHED_CERT_LEN) ||
+        (cert->derCert.len <= 0) ||
+        (cert->derCert.data == NULL)) {
+        PORT_SetError(SEC_ERROR_INVALID_ARGS);
+        return 0;
+    }
+
+    cce.sessionIDLength = sce->sessionIDLength;
+    PORT_Memcpy(cce.sessionID, sce->sessionID, cce.sessionIDLength);
+
+    cce.certLength = cert->derCert.len;
+    PORT_Memcpy(cce.cert, cert->derCert.data, cce.certLength);
+
+    /* get lock on cert cache */
+    now = LockSidCacheLock(cache->certCacheLock, 0);
+    if (now) {
+
+        /* Find where to place the next cert cache entry. */
+        cacheDesc *sharedCache = cache->sharedCache;
+        PRUint32 ndx = sharedCache->nextCertCacheEntry;
+
+        /* write the entry */
+        cache->certCacheData[ndx] = cce;
+
+        /* remember where we put it. */
+        sce->u.ssl3.certIndex = ndx;
+
+        /* update the "next" cache entry index */
+        sharedCache->nextCertCacheEntry =
+            (ndx + 1) % cache->numCertCacheEntries;
+
+        UnlockSidCacheLock(cache->certCacheLock);
+    }
+    return now;
+}
+
+/* Server configuration hash tables need to account the SECITEM.type
+ * field as well. These functions accomplish that. */
+static PLHashNumber
+Get32BitNameHash(const SECItem *name)
+{
+    PLHashNumber rv = SECITEM_Hash(name);
+
+    PRUint8 *rvc = (PRUint8 *)&rv;
+    rvc[name->len % sizeof(rv)] ^= name->type;
+
+    return rv;
+}
+
+/* Put a name in the cache.  Update the cert index in the sce.
+*/
+static PRUint32
+CacheSrvName(cacheDesc *cache, SECItem *name, sidCacheEntry *sce)
+{
+    PRUint32 now;
+    PRUint32 ndx;
+    srvNameCacheEntry snce;
+
+    if (!name || name->len <= 0 ||
+        name->len > SSL_MAX_DNS_HOST_NAME) {
+        PORT_SetError(SEC_ERROR_INVALID_ARGS);
+        return 0;
+    }
+
+    snce.type = name->type;
+    snce.nameLen = name->len;
+    PORT_Memcpy(snce.name, name->data, snce.nameLen);
+    HASH_HashBuf(HASH_AlgSHA256, snce.nameHash, name->data, name->len);
+
+    /* get index of the next name */
+    ndx = Get32BitNameHash(name);
+    /* get lock on cert cache */
+    now = LockSidCacheLock(cache->srvNameCacheLock, 0);
+    if (now) {
+        if (cache->numSrvNameCacheEntries > 0) {
+            /* Fit the index into array */
+            ndx %= cache->numSrvNameCacheEntries;
+            /* write the entry */
+            cache->srvNameCacheData[ndx] = snce;
+            /* remember where we put it. */
+            sce->u.ssl3.srvNameIndex = ndx;
+            /* Copy hash into sid hash */
+            PORT_Memcpy(sce->u.ssl3.srvNameHash, snce.nameHash, SHA256_LENGTH);
+        }
+        UnlockSidCacheLock(cache->srvNameCacheLock);
+    }
+    return now;
+}
+
+/*
+** Convert local SID to shared memory one
+*/
+static void
+ConvertFromSID(sidCacheEntry *to, sslSessionID *from)
+{
+    to->valid = 1;
+    to->version = from->version;
+    to->addr = from->addr;
+    to->creationTime = from->creationTime;
+    to->lastAccessTime = from->lastAccessTime;
+    to->expirationTime = from->expirationTime;
+    to->authType = from->authType;
+    to->authKeyBits = from->authKeyBits;
+    to->keaType = from->keaType;
+    to->keaKeyBits = from->keaKeyBits;
+
+    to->u.ssl3.cipherSuite = from->u.ssl3.cipherSuite;
+    to->u.ssl3.compression = (PRUint16)from->u.ssl3.compression;
+    to->u.ssl3.keys = from->u.ssl3.keys;
+    to->u.ssl3.masterWrapMech = from->u.ssl3.masterWrapMech;
+    to->sessionIDLength = from->u.ssl3.sessionIDLength;
+    to->u.ssl3.certIndex = -1;
+    to->u.ssl3.srvNameIndex = -1;
+    PORT_Memcpy(to->sessionID, from->u.ssl3.sessionID,
+                to->sessionIDLength);
+    to->u.ssl3.certTypeArgs = 0U;
+    switch (from->authType) {
+        case ssl_auth_ecdsa:
+        case ssl_auth_ecdh_rsa:
+        case ssl_auth_ecdh_ecdsa:
+            PORT_Assert(from->certType.namedCurve);
+            to->u.ssl3.certTypeArgs =
+                (PRUint16)from->certType.namedCurve->name;
+            break;
+        default:
+            break;
+    }
+
+    SSL_TRC(8, ("%d: SSL3: ConvertSID: time=%d addr=0x%08x%08x%08x%08x "
+                "cipherSuite=%d",
+                myPid, to->creationTime, to->addr.pr_s6_addr32[0],
+                to->addr.pr_s6_addr32[1], to->addr.pr_s6_addr32[2],
+                to->addr.pr_s6_addr32[3], to->u.ssl3.cipherSuite));
+}
+
+/*
+** Convert shared memory cache-entry to local memory based one
+** This is only called from ServerSessionIDLookup().
+*/
+static sslSessionID *
+ConvertToSID(sidCacheEntry *from,
+             certCacheEntry *pcce,
+             srvNameCacheEntry *psnce,
+             CERTCertDBHandle *dbHandle)
+{
+    sslSessionID *to;
+
+    to = PORT_ZNew(sslSessionID);
+    if (!to) {
+        return 0;
+    }
+
+    to->u.ssl3.sessionIDLength = from->sessionIDLength;
+    to->u.ssl3.cipherSuite = from->u.ssl3.cipherSuite;
+    to->u.ssl3.compression = (SSLCompressionMethod)from->u.ssl3.compression;
+    to->u.ssl3.keys = from->u.ssl3.keys;
+    to->u.ssl3.masterWrapMech = from->u.ssl3.masterWrapMech;
+    if (from->u.ssl3.srvNameIndex != -1 && psnce) {
+        SECItem name;
+        SECStatus rv;
+        name.type = psnce->type;
+        name.len = psnce->nameLen;
+        name.data = psnce->name;
+        rv = SECITEM_CopyItem(NULL, &to->u.ssl3.srvName, &name);
+        if (rv != SECSuccess) {
+            goto loser;
+        }
+    }
+
+    PORT_Memcpy(to->u.ssl3.sessionID, from->sessionID, from->sessionIDLength);
+
+    /* the portions of the SID that are only restored on the client
+     * are set to invalid values on the server.
+     */
+    to->u.ssl3.clientWriteKey = NULL;
+    to->u.ssl3.serverWriteKey = NULL;
+
+    to->urlSvrName = NULL;
+
+    to->u.ssl3.masterModuleID = (SECMODModuleID)-1; /* invalid value */
+    to->u.ssl3.masterSlotID = (CK_SLOT_ID)-1;       /* invalid value */
+    to->u.ssl3.masterWrapIndex = 0;
+    to->u.ssl3.masterWrapSeries = 0;
+    to->u.ssl3.masterValid = PR_FALSE;
+
+    to->u.ssl3.clAuthModuleID = (SECMODModuleID)-1; /* invalid value */
+    to->u.ssl3.clAuthSlotID = (CK_SLOT_ID)-1;       /* invalid value */
+    to->u.ssl3.clAuthSeries = 0;
+    to->u.ssl3.clAuthValid = PR_FALSE;
+
+    if (from->u.ssl3.certIndex != -1 && pcce) {
+        SECItem derCert;
+
+        derCert.len = pcce->certLength;
+        derCert.data = pcce->cert;
+
+        to->peerCert = CERT_NewTempCertificate(dbHandle, &derCert, NULL,
+                                               PR_FALSE, PR_TRUE);
+        if (to->peerCert == NULL)
+            goto loser;
+    }
+    to->certType.authType = from->authType;
+    switch (from->authType) {
+        case ssl_auth_ecdsa:
+        case ssl_auth_ecdh_rsa:
+        case ssl_auth_ecdh_ecdsa:
+            to->certType.namedCurve =
+                ssl_LookupNamedGroup((SSLNamedGroup)from->u.ssl3.certTypeArgs);
+            break;
+        default:
+            break;
+    }
+
+    to->version = from->version;
+    to->creationTime = from->creationTime;
+    to->lastAccessTime = from->lastAccessTime;
+    to->expirationTime = from->expirationTime;
+    to->cached = in_server_cache;
+    to->addr = from->addr;
+    to->references = 1;
+    to->authType = from->authType;
+    to->authKeyBits = from->authKeyBits;
+    to->keaType = from->keaType;
+    to->keaKeyBits = from->keaKeyBits;
+
+    return to;
+
+loser:
+    if (to) {
+        SECITEM_FreeItem(&to->u.ssl3.srvName, PR_FALSE);
+        PORT_Free(to);
+    }
+    return NULL;
+}
+
+/*
+** Perform some mumbo jumbo on the ip-address and the session-id value to
+** compute a hash value.
+*/
+static PRUint32
+SIDindex(cacheDesc *cache, const PRIPv6Addr *addr, PRUint8 *s, unsigned nl)
+{
+    PRUint32 rv;
+    PRUint32 x[8];
+
+    memset(x, 0, sizeof x);
+    if (nl > sizeof x)
+        nl = sizeof x;
+    memcpy(x, s, nl);
+
+    rv = (addr->pr_s6_addr32[0] ^ addr->pr_s6_addr32[1] ^
+          addr->pr_s6_addr32[2] ^ addr->pr_s6_addr32[3] ^
+          x[0] ^ x[1] ^ x[2] ^ x[3] ^ x[4] ^ x[5] ^ x[6] ^ x[7]) %
+         cache->numSIDCacheSets;
+    return rv;
+}
+
+/*
+** Look something up in the cache. This will invalidate old entries
+** in the process. Caller has locked the cache set!
+** Returns PR_TRUE if found a valid match.  PR_FALSE otherwise.
+*/
+static sidCacheEntry *
+FindSID(cacheDesc *cache, PRUint32 setNum, PRUint32 now,
+        const PRIPv6Addr *addr, unsigned char *sessionID,
+        unsigned sessionIDLength)
+{
+    PRUint32 ndx = cache->sidCacheSets[setNum].next;
+    int i;
+
+    sidCacheEntry *set = cache->sidCacheData +
+                         (setNum * SID_CACHE_ENTRIES_PER_SET);
+
+    for (i = SID_CACHE_ENTRIES_PER_SET; i > 0; --i) {
+        sidCacheEntry *sce;
+
+        ndx = (ndx - 1) % SID_CACHE_ENTRIES_PER_SET;
+        sce = set + ndx;
+
+        if (!sce->valid)
+            continue;
+
+        if (now > sce->expirationTime) {
+            /* SessionID has timed out. Invalidate the entry. */
+            SSL_TRC(7, ("%d: timed out sid entry addr=%08x%08x%08x%08x now=%x "
+                        "time+=%x",
+                        myPid, sce->addr.pr_s6_addr32[0],
+                        sce->addr.pr_s6_addr32[1], sce->addr.pr_s6_addr32[2],
+                        sce->addr.pr_s6_addr32[3], now,
+                        sce->expirationTime));
+            sce->valid = 0;
+            continue;
+        }
+
+        /*
+        ** Next, examine specific session-id/addr data to see if the cache
+        ** entry matches our addr+session-id value
+        */
+        if (sessionIDLength == sce->sessionIDLength &&
+            !memcmp(&sce->addr, addr, sizeof(PRIPv6Addr)) &&
+            !memcmp(sce->sessionID, sessionID, sessionIDLength)) {
+            /* Found it */
+            return sce;
+        }
+    }
+
+    PORT_SetError(SSL_ERROR_SESSION_NOT_FOUND);
+    return NULL;
+}
+
+/************************************************************************/
+
+/* This is the primary function for finding entries in the server's sid cache.
+ * Although it is static, this function is called via the global function
+ * pointer ssl_sid_lookup.
+ */
+static sslSessionID *
+ServerSessionIDLookup(const PRIPv6Addr *addr,
+                      unsigned char *sessionID,
+                      unsigned int sessionIDLength,
+                      CERTCertDBHandle *dbHandle)
+{
+    sslSessionID *sid = 0;
+    sidCacheEntry *psce;
+    certCacheEntry *pcce = 0;
+    srvNameCacheEntry *psnce = 0;
+    cacheDesc *cache = &globalCache;
+    PRUint32 now;
+    PRUint32 set;
+    PRInt32 cndx;
+    sidCacheEntry sce;
+    certCacheEntry cce;
+    srvNameCacheEntry snce;
+
+    set = SIDindex(cache, addr, sessionID, sessionIDLength);
+    now = LockSet(cache, set, 0);
+    if (!now)
+        return NULL;
+
+    psce = FindSID(cache, set, now, addr, sessionID, sessionIDLength);
+    if (psce) {
+        if ((cndx = psce->u.ssl3.certIndex) != -1) {
+            PRUint32 gotLock = LockSidCacheLock(cache->certCacheLock, now);
+            if (gotLock) {
+                pcce = &cache->certCacheData[cndx];
+
+                /* See if the cert's session ID matches the sce cache. */
+                if ((pcce->sessionIDLength == psce->sessionIDLength) &&
+                    !PORT_Memcmp(pcce->sessionID, psce->sessionID,
+                                 pcce->sessionIDLength)) {
+                    cce = *pcce;
+                } else {
+                    /* The cert doesen't match the SID cache entry,
+                    ** so invalidate the SID cache entry.
+                    */
+                    psce->valid = 0;
+                    psce = 0;
+                    pcce = 0;
+                }
+                UnlockSidCacheLock(cache->certCacheLock);
+            } else {
+                /* what the ??.  Didn't get the cert cache lock.
+                ** Don't invalidate the SID cache entry, but don't find it.
+                */
+                PORT_Assert(!("Didn't get cert Cache Lock!"));
+                psce = 0;
+                pcce = 0;
+            }
+        }
+        if (psce && ((cndx = psce->u.ssl3.srvNameIndex) != -1)) {
+            PRUint32 gotLock = LockSidCacheLock(cache->srvNameCacheLock,
+                                                now);
+            if (gotLock) {
+                psnce = &cache->srvNameCacheData[cndx];
+
+                if (!PORT_Memcmp(psnce->nameHash, psce->u.ssl3.srvNameHash,
+                                 SHA256_LENGTH)) {
+                    snce = *psnce;
+                } else {
+                    /* The name doesen't match the SID cache entry,
+                    ** so invalidate the SID cache entry.
+                    */
+                    psce->valid = 0;
+                    psce = 0;
+                    psnce = 0;
+                }
+                UnlockSidCacheLock(cache->srvNameCacheLock);
+            } else {
+                /* what the ??.  Didn't get the cert cache lock.
+                ** Don't invalidate the SID cache entry, but don't find it.
+                */
+                PORT_Assert(!("Didn't get name Cache Lock!"));
+                psce = 0;
+                psnce = 0;
+            }
+        }
+        if (psce) {
+            psce->lastAccessTime = now;
+            sce = *psce; /* grab a copy while holding the lock */
+        }
+    }
+    UnlockSet(cache, set);
+    if (psce) {
+        /* sce conains a copy of the cache entry.
+        ** Convert shared memory format to local format
+        */
+        sid = ConvertToSID(&sce, pcce ? &cce : 0, psnce ? &snce : 0, dbHandle);
+    }
+    return sid;
+}
+
+/*
+** Place a sid into the cache, if it isn't already there.
+*/
+static void
+ServerSessionIDCache(sslSessionID *sid)
+{
+    sidCacheEntry sce;
+    PRUint32 now = 0;
+    cacheDesc *cache = &globalCache;
+
+    if (sid->u.ssl3.sessionIDLength == 0) {
+        return;
+    }
+
+    if (sid->cached == never_cached || sid->cached == invalid_cache) {
+        PRUint32 set;
+        SECItem *name;
+
+        PORT_Assert(sid->creationTime != 0);
+        if (!sid->creationTime)
+            sid->lastAccessTime = sid->creationTime = ssl_Time();
+        /* override caller's expiration time, which uses client timeout
+         * duration, not server timeout duration.
+         */
+        sid->expirationTime = sid->creationTime + cache->ssl3Timeout;
+        SSL_TRC(8, ("%d: SSL: CacheMT: cached=%d addr=0x%08x%08x%08x%08x time=%x "
+                    "cipherSuite=%d",
+                    myPid, sid->cached,
+                    sid->addr.pr_s6_addr32[0], sid->addr.pr_s6_addr32[1],
+                    sid->addr.pr_s6_addr32[2], sid->addr.pr_s6_addr32[3],
+                    sid->creationTime, sid->u.ssl3.cipherSuite));
+        PRINT_BUF(8, (0, "sessionID:", sid->u.ssl3.sessionID,
+                      sid->u.ssl3.sessionIDLength));
+
+        ConvertFromSID(&sce, sid);
+
+        name = &sid->u.ssl3.srvName;
+        if (name->len && name->data) {
+            now = CacheSrvName(cache, name, &sce);
+        }
+        if (sid->peerCert != NULL) {
+            now = CacheCert(cache, sid->peerCert, &sce);
+        }
+
+        set = SIDindex(cache, &sce.addr, sce.sessionID, sce.sessionIDLength);
+        now = LockSet(cache, set, now);
+        if (now) {
+            PRUint32 next = cache->sidCacheSets[set].next;
+            PRUint32 ndx = set * SID_CACHE_ENTRIES_PER_SET + next;
+
+            /* Write out new cache entry */
+            cache->sidCacheData[ndx] = sce;
+
+            cache->sidCacheSets[set].next =
+                (next + 1) % SID_CACHE_ENTRIES_PER_SET;
+
+            UnlockSet(cache, set);
+            sid->cached = in_server_cache;
+        }
+    }
+}
+
+/*
+** Although this is static, it is called from ssl via global function pointer
+**  ssl_sid_uncache.  This invalidates the referenced cache entry.
+*/
+static void
+ServerSessionIDUncache(sslSessionID *sid)
+{
+    cacheDesc *cache = &globalCache;
+    PRUint8 *sessionID;
+    unsigned int sessionIDLength;
+    PRErrorCode err;
+    PRUint32 set;
+    PRUint32 now;
+    sidCacheEntry *psce;
+
+    if (sid == NULL)
+        return;
+
+    /* Uncaching a SID should never change the error code.
+    ** So save it here and restore it before exiting.
+    */
+    err = PR_GetError();
+
+    sessionID = sid->u.ssl3.sessionID;
+    sessionIDLength = sid->u.ssl3.sessionIDLength;
+    SSL_TRC(8, ("%d: SSL3: UncacheMT: valid=%d addr=0x%08x%08x%08x%08x time=%x "
+                "cipherSuite=%d",
+                myPid, sid->cached,
+                sid->addr.pr_s6_addr32[0], sid->addr.pr_s6_addr32[1],
+                sid->addr.pr_s6_addr32[2], sid->addr.pr_s6_addr32[3],
+                sid->creationTime, sid->u.ssl3.cipherSuite));
+    PRINT_BUF(8, (0, "sessionID:", sessionID, sessionIDLength));
+    set = SIDindex(cache, &sid->addr, sessionID, sessionIDLength);
+    now = LockSet(cache, set, 0);
+    if (now) {
+        psce = FindSID(cache, set, now, &sid->addr, sessionID, sessionIDLength);
+        if (psce) {
+            psce->valid = 0;
+        }
+        UnlockSet(cache, set);
+    }
+    sid->cached = invalid_cache;
+    PORT_SetError(err);
+}
+
+#ifdef XP_OS2
+
+#define INCL_DOSPROCESS
+#include <os2.h>
+
+long
+gettid(void)
+{
+    PTIB ptib;
+    PPIB ppib;
+    DosGetInfoBlocks(&ptib, &ppib);
+    return ((long)ptib->tib_ordinal); /* thread id */
+}
+#endif
+
+static void
+CloseCache(cacheDesc *cache)
+{
+    int locks_initialized = cache->numSIDCacheLocksInitialized;
+
+    if (cache->cacheMem) {
+        if (cache->sharedCache) {
+            sidCacheLock *pLock = cache->sidCacheLocks;
+            for (; locks_initialized > 0; --locks_initialized, ++pLock) {
+                /* If everInherited is true, this shared cache was (and may
+                ** still be) in use by multiple processes.  We do not wish to
+                ** destroy the mutexes while they are still in use, but we do
+                ** want to free mutex resources associated with this process.
+                */
+                sslMutex_Destroy(&pLock->mutex,
+                                 cache->sharedCache->everInherited);
+            }
+        }
+        if (cache->shared) {
+            PR_MemUnmap(cache->cacheMem, cache->cacheMemSize);
+        } else {
+            PORT_Free(cache->cacheMem);
+        }
+        cache->cacheMem = NULL;
+    }
+    if (cache->cacheMemMap) {
+        PR_CloseFileMap(cache->cacheMemMap);
+        cache->cacheMemMap = NULL;
+    }
+    memset(cache, 0, sizeof *cache);
+}
+
+static SECStatus
+InitCache(cacheDesc *cache, int maxCacheEntries, int maxCertCacheEntries,
+          int maxSrvNameCacheEntries, PRUint32 ssl3_timeout,
+          const char *directory, PRBool shared)
+{
+    ptrdiff_t ptr;
+    sidCacheLock *pLock;
+    char *cacheMem;
+    PRFileMap *cacheMemMap;
+    char *cfn = NULL; /* cache file name */
+    int locks_initialized = 0;
+    int locks_to_initialize = 0;
+    PRUint32 init_time;
+
+    if ((!cache) || (maxCacheEntries < 0) || (!directory)) {
+        PORT_SetError(SEC_ERROR_INVALID_ARGS);
+        return SECFailure;
+    }
+
+    if (cache->cacheMem) {
+        /* Already done */
+        return SECSuccess;
+    }
+
+    /* make sure loser can clean up properly */
+    cache->shared = shared;
+    cache->cacheMem = cacheMem = NULL;
+    cache->cacheMemMap = cacheMemMap = NULL;
+    cache->sharedCache = (cacheDesc *)0;
+
+    cache->numSIDCacheLocksInitialized = 0;
+    cache->nextCertCacheEntry = 0;
+    cache->stopPolling = PR_FALSE;
+    cache->everInherited = PR_FALSE;
+    cache->poller = NULL;
+    cache->mutexTimeout = 0;
+
+    cache->numSIDCacheEntries = maxCacheEntries ? maxCacheEntries
+                                                : DEF_SID_CACHE_ENTRIES;
+    cache->numSIDCacheSets =
+        SID_HOWMANY(cache->numSIDCacheEntries, SID_CACHE_ENTRIES_PER_SET);
+
+    cache->numSIDCacheEntries =
+        cache->numSIDCacheSets * SID_CACHE_ENTRIES_PER_SET;
+
+    cache->numSIDCacheLocks =
+        PR_MIN(cache->numSIDCacheSets, ssl_max_sid_cache_locks);
+
+    cache->numSIDCacheSetsPerLock =
+        SID_HOWMANY(cache->numSIDCacheSets, cache->numSIDCacheLocks);
+
+    cache->numCertCacheEntries = (maxCertCacheEntries > 0) ? maxCertCacheEntries
+                                                           : 0;
+    cache->numSrvNameCacheEntries = (maxSrvNameCacheEntries >= 0) ? maxSrvNameCacheEntries
+                                                                  : DEF_NAME_CACHE_ENTRIES;
+
+    /* compute size of shared memory, and offsets of all pointers */
+    ptr = 0;
+    cache->cacheMem = (char *)ptr;
+    ptr += SID_ROUNDUP(sizeof(cacheDesc), SID_ALIGNMENT);
+
+    cache->sidCacheLocks = (sidCacheLock *)ptr;
+    cache->keyCacheLock = cache->sidCacheLocks + cache->numSIDCacheLocks;
+    cache->certCacheLock = cache->keyCacheLock + 1;
+    cache->srvNameCacheLock = cache->certCacheLock + 1;
+    ptr = (ptrdiff_t)(cache->srvNameCacheLock + 1);
+    ptr = SID_ROUNDUP(ptr, SID_ALIGNMENT);
+
+    cache->sidCacheSets = (sidCacheSet *)ptr;
+    ptr = (ptrdiff_t)(cache->sidCacheSets + cache->numSIDCacheSets);
+    ptr = SID_ROUNDUP(ptr, SID_ALIGNMENT);
+
+    cache->sidCacheData = (sidCacheEntry *)ptr;
+    ptr = (ptrdiff_t)(cache->sidCacheData + cache->numSIDCacheEntries);
+    ptr = SID_ROUNDUP(ptr, SID_ALIGNMENT);
+
+    cache->certCacheData = (certCacheEntry *)ptr;
+    cache->sidCacheSize =
+        (char *)cache->certCacheData - (char *)cache->sidCacheData;
+
+    if (cache->numCertCacheEntries < MIN_CERT_CACHE_ENTRIES) {
+        /* This is really a poor way to computer this! */
+        cache->numCertCacheEntries = cache->sidCacheSize / sizeof(certCacheEntry);
+        if (cache->numCertCacheEntries < MIN_CERT_CACHE_ENTRIES)
+            cache->numCertCacheEntries = MIN_CERT_CACHE_ENTRIES;
+    }
+    ptr = (ptrdiff_t)(cache->certCacheData + cache->numCertCacheEntries);
+    ptr = SID_ROUNDUP(ptr, SID_ALIGNMENT);
+
+    cache->keyCacheData = (SSLWrappedSymWrappingKey *)ptr;
+    cache->certCacheSize =
+        (char *)cache->keyCacheData - (char *)cache->certCacheData;
+
+    cache->numKeyCacheEntries = ssl_auth_size * SSL_NUM_WRAP_MECHS;
+    ptr = (ptrdiff_t)(cache->keyCacheData + cache->numKeyCacheEntries);
+    ptr = SID_ROUNDUP(ptr, SID_ALIGNMENT);
+
+    cache->keyCacheSize = (char *)ptr - (char *)cache->keyCacheData;
+
+    cache->ticketKeyNameSuffix = (PRUint8 *)ptr;
+    ptr = (ptrdiff_t)(cache->ticketKeyNameSuffix +
+                      SESS_TICKET_KEY_VAR_NAME_LEN);
+    ptr = SID_ROUNDUP(ptr, SID_ALIGNMENT);
+
+    cache->ticketEncKey = (encKeyCacheEntry *)ptr;
+    ptr = (ptrdiff_t)(cache->ticketEncKey + 1);
+    ptr = SID_ROUNDUP(ptr, SID_ALIGNMENT);
+
+    cache->ticketMacKey = (encKeyCacheEntry *)ptr;
+    ptr = (ptrdiff_t)(cache->ticketMacKey + 1);
+    ptr = SID_ROUNDUP(ptr, SID_ALIGNMENT);
+
+    cache->ticketKeysValid = (PRUint32 *)ptr;
+    ptr = (ptrdiff_t)(cache->ticketKeysValid + 1);
+    ptr = SID_ROUNDUP(ptr, SID_ALIGNMENT);
+
+    cache->srvNameCacheData = (srvNameCacheEntry *)ptr;
+    cache->srvNameCacheSize =
+        cache->numSrvNameCacheEntries * sizeof(srvNameCacheEntry);
+    ptr = (ptrdiff_t)(cache->srvNameCacheData + cache->numSrvNameCacheEntries);
+    ptr = SID_ROUNDUP(ptr, SID_ALIGNMENT);
+
+    cache->cacheMemSize = ptr;
+
+    if (ssl3_timeout) {
+        if (ssl3_timeout > MAX_SSL3_TIMEOUT) {
+            ssl3_timeout = MAX_SSL3_TIMEOUT;
+        }
+        if (ssl3_timeout < MIN_SSL3_TIMEOUT) {
+            ssl3_timeout = MIN_SSL3_TIMEOUT;
+        }
+        cache->ssl3Timeout = ssl3_timeout;
+    } else {
+        cache->ssl3Timeout = DEF_SSL3_TIMEOUT;
+    }
+
+    if (shared) {
+/* Create file names */
+#if defined(XP_UNIX) || defined(XP_BEOS)
+        /* there's some confusion here about whether PR_OpenAnonFileMap wants
+        ** a directory name or a file name for its first argument.
+        cfn = PR_smprintf("%s/.sslsvrcache.%d", directory, myPid);
+        */
+        cfn = PR_smprintf("%s", directory);
+#elif defined(XP_WIN32)
+        cfn = PR_smprintf("%s/svrcache_%d_%x.ssl", directory, myPid,
+                          GetCurrentThreadId());
+#elif defined(XP_OS2)
+        cfn = PR_smprintf("%s/svrcache_%d_%x.ssl", directory, myPid,
+                          gettid());
+#else
+#error "Don't know how to create file name for this platform!"
+#endif
+        if (!cfn) {
+            goto loser;
+        }
+
+        /* Create cache */
+        cacheMemMap = PR_OpenAnonFileMap(cfn, cache->cacheMemSize,
+                                         PR_PROT_READWRITE);
+
+        PR_smprintf_free(cfn);
+        if (!cacheMemMap) {
+            goto loser;
+        }
+
+        cacheMem = PR_MemMap(cacheMemMap, 0, cache->cacheMemSize);
+    } else {
+        cacheMem = PORT_Alloc(cache->cacheMemSize);
+    }
+
+    if (!cacheMem) {
+        goto loser;
+    }
+
+    /* Initialize shared memory. This may not be necessary on all platforms */
+    memset(cacheMem, 0, cache->cacheMemSize);
+
+    /* Copy cache descriptor header into shared memory */
+    memcpy(cacheMem, cache, sizeof *cache);
+
+    /* save private copies of these values */
+    cache->cacheMemMap = cacheMemMap;
+    cache->cacheMem = cacheMem;
+    cache->sharedCache = (cacheDesc *)cacheMem;
+
+    /* Fix pointers in our private copy of cache descriptor to point to
+    ** spaces in shared memory
+    */
+    cache->sidCacheLocks = (sidCacheLock *)(cache->cacheMem + (ptrdiff_t)cache->sidCacheLocks);
+    cache->keyCacheLock = (sidCacheLock *)(cache->cacheMem + (ptrdiff_t)cache->keyCacheLock);
+    cache->certCacheLock = (sidCacheLock *)(cache->cacheMem + (ptrdiff_t)cache->certCacheLock);
+    cache->srvNameCacheLock = (sidCacheLock *)(cache->cacheMem + (ptrdiff_t)cache->srvNameCacheLock);
+    cache->sidCacheSets = (sidCacheSet *)(cache->cacheMem + (ptrdiff_t)cache->sidCacheSets);
+    cache->sidCacheData = (sidCacheEntry *)(cache->cacheMem + (ptrdiff_t)cache->sidCacheData);
+    cache->certCacheData = (certCacheEntry *)(cache->cacheMem + (ptrdiff_t)cache->certCacheData);
+    cache->keyCacheData = (SSLWrappedSymWrappingKey *)(cache->cacheMem + (ptrdiff_t)cache->keyCacheData);
+    cache->ticketKeyNameSuffix = (PRUint8 *)(cache->cacheMem + (ptrdiff_t)cache->ticketKeyNameSuffix);
+    cache->ticketEncKey = (encKeyCacheEntry *)(cache->cacheMem + (ptrdiff_t)cache->ticketEncKey);
+    cache->ticketMacKey = (encKeyCacheEntry *)(cache->cacheMem + (ptrdiff_t)cache->ticketMacKey);
+    cache->ticketKeysValid = (PRUint32 *)(cache->cacheMem + (ptrdiff_t)cache->ticketKeysValid);
+    cache->srvNameCacheData = (srvNameCacheEntry *)(cache->cacheMem + (ptrdiff_t)cache->srvNameCacheData);
+
+    /* initialize the locks */
+    init_time = ssl_Time();
+    pLock = cache->sidCacheLocks;
+    for (locks_to_initialize = cache->numSIDCacheLocks + 3;
+         locks_initialized < locks_to_initialize;
+         ++locks_initialized, ++pLock) {
+
+        SECStatus err = sslMutex_Init(&pLock->mutex, shared);
+        if (err) {
+            cache->numSIDCacheLocksInitialized = locks_initialized;
+            goto loser;
+        }
+        pLock->timeStamp = init_time;
+        pLock->pid = 0;
+    }
+    cache->numSIDCacheLocksInitialized = locks_initialized;
+
+    return SECSuccess;
+
+loser:
+    CloseCache(cache);
+    PORT_SetError(SEC_ERROR_LIBRARY_FAILURE);
+    return SECFailure;
+}
+
+PRUint32
+SSL_GetMaxServerCacheLocks(void)
+{
+    return ssl_max_sid_cache_locks + 2;
+    /* The extra two are the cert cache lock and the key cache lock. */
+}
+
+SECStatus
+SSL_SetMaxServerCacheLocks(PRUint32 maxLocks)
+{
+    /* Minimum is 1 sid cache lock, 1 cert cache lock and 1 key cache lock.
+    ** We'd like to test for a maximum value, but not all platforms' header
+    ** files provide a symbol or function or other means of determining
+    ** the maximum, other than trial and error.
+    */
+    if (maxLocks < 3) {
+        PORT_SetError(SEC_ERROR_INVALID_ARGS);
+        return SECFailure;
+    }
+    ssl_max_sid_cache_locks = maxLocks - 2;
+    /* The extra two are the cert cache lock and the key cache lock. */
+    return SECSuccess;
+}
+
+static SECStatus
+ssl_ConfigServerSessionIDCacheInstanceWithOpt(cacheDesc *cache,
+                                              PRUint32 ssl3_timeout,
+                                              const char *directory,
+                                              PRBool shared,
+                                              int maxCacheEntries,
+                                              int maxCertCacheEntries,
+                                              int maxSrvNameCacheEntries)
+{
+    SECStatus rv;
+
+    PORT_Assert(sizeof(sidCacheEntry) == 192);
+    PORT_Assert(sizeof(certCacheEntry) == 4096);
+    PORT_Assert(sizeof(srvNameCacheEntry) == 1072);
+
+    rv = ssl_Init();
+    if (rv != SECSuccess) {
+        return rv;
+    }
+
+    myPid = SSL_GETPID();
+    if (!directory) {
+        directory = DEFAULT_CACHE_DIRECTORY;
+    }
+    rv = InitCache(cache, maxCacheEntries, maxCertCacheEntries,
+                   maxSrvNameCacheEntries, ssl3_timeout, directory, shared);
+    if (rv) {
+        return SECFailure;
+    }
+
+    ssl_sid_lookup = ServerSessionIDLookup;
+    ssl_sid_cache = ServerSessionIDCache;
+    ssl_sid_uncache = ServerSessionIDUncache;
+    return SECSuccess;
+}
+
+SECStatus
+SSL_ConfigServerSessionIDCacheInstance(cacheDesc *cache,
+                                       int maxCacheEntries,
+                                       PRUint32 ssl2_timeout,
+                                       PRUint32 ssl3_timeout,
+                                       const char *directory, PRBool shared)
+{
+    return ssl_ConfigServerSessionIDCacheInstanceWithOpt(cache,
+                                                         ssl3_timeout,
+                                                         directory,
+                                                         shared,
+                                                         maxCacheEntries,
+                                                         -1, -1);
+}
+
+SECStatus
+SSL_ConfigServerSessionIDCache(int maxCacheEntries,
+                               PRUint32 ssl2_timeout,
+                               PRUint32 ssl3_timeout,
+                               const char *directory)
+{
+    ssl_InitSessionCacheLocks(PR_FALSE);
+    return SSL_ConfigServerSessionIDCacheInstance(&globalCache,
+                                                  maxCacheEntries, ssl2_timeout, ssl3_timeout, directory, PR_FALSE);
+}
+
+SECStatus
+SSL_ShutdownServerSessionIDCacheInstance(cacheDesc *cache)
+{
+    CloseCache(cache);
+    return SECSuccess;
+}
+
+SECStatus
+SSL_ShutdownServerSessionIDCache(void)
+{
+#if defined(XP_UNIX) || defined(XP_BEOS)
+    /* Stop the thread that polls cache for expired locks on Unix */
+    StopLockPoller(&globalCache);
+#endif
+    SSL3_ShutdownServerCache();
+    return SSL_ShutdownServerSessionIDCacheInstance(&globalCache);
+}
+
+/* Use this function, instead of SSL_ConfigServerSessionIDCache,
+ * if the cache will be shared by multiple processes.
+ */
+static SECStatus
+ssl_ConfigMPServerSIDCacheWithOpt(PRUint32 ssl3_timeout,
+                                  const char *directory,
+                                  int maxCacheEntries,
+                                  int maxCertCacheEntries,
+                                  int maxSrvNameCacheEntries)
+{
+    char *envValue;
+    char *inhValue;
+    cacheDesc *cache = &globalCache;
+    PRUint32 fmStrLen;
+    SECStatus result;
+    PRStatus prStatus;
+    SECStatus putEnvFailed;
+    inheritance inherit;
+    char fmString[PR_FILEMAP_STRING_BUFSIZE];
+
+    isMultiProcess = PR_TRUE;
+    result = ssl_ConfigServerSessionIDCacheInstanceWithOpt(cache,
+                                                           ssl3_timeout, directory, PR_TRUE,
+                                                           maxCacheEntries, maxCacheEntries, maxSrvNameCacheEntries);
+    if (result != SECSuccess)
+        return result;
+
+    prStatus = PR_ExportFileMapAsString(cache->cacheMemMap,
+                                        sizeof fmString, fmString);
+    if ((prStatus != PR_SUCCESS) || !(fmStrLen = strlen(fmString))) {
+        PORT_SetError(SEC_ERROR_LIBRARY_FAILURE);
+        return SECFailure;
+    }
+
+    inherit.cacheMemSize = cache->cacheMemSize;
+    inherit.fmStrLen = fmStrLen;
+
+    inhValue = BTOA_DataToAscii((unsigned char *)&inherit, sizeof inherit);
+    if (!inhValue || !strlen(inhValue)) {
+        PORT_SetError(SEC_ERROR_LIBRARY_FAILURE);
+        return SECFailure;
+    }
+    envValue = PR_smprintf("%s,%s", inhValue, fmString);
+    if (!envValue || !strlen(envValue)) {
+        PORT_SetError(SEC_ERROR_LIBRARY_FAILURE);
+        return SECFailure;
+    }
+    PORT_Free(inhValue);
+
+    putEnvFailed = (SECStatus)NSS_PutEnv(envVarName, envValue);
+    PR_smprintf_free(envValue);
+    if (putEnvFailed) {
+        PORT_SetError(SEC_ERROR_LIBRARY_FAILURE);
+        result = SECFailure;
+    }
+
+#if defined(XP_UNIX) || defined(XP_BEOS)
+    /* Launch thread to poll cache for expired locks on Unix */
+    LaunchLockPoller(cache);
+#endif
+    return result;
+}
+
+/* Use this function, instead of SSL_ConfigServerSessionIDCache,
+ * if the cache will be shared by multiple processes.
+ */
+SECStatus
+SSL_ConfigMPServerSIDCache(int maxCacheEntries,
+                           PRUint32 ssl2_timeout,
+                           PRUint32 ssl3_timeout,
+                           const char *directory)
+{
+    return ssl_ConfigMPServerSIDCacheWithOpt(ssl3_timeout,
+                                             directory,
+                                             maxCacheEntries,
+                                             -1, -1);
+}
+
+SECStatus
+SSL_ConfigServerSessionIDCacheWithOpt(
+    PRUint32 ssl2_timeout,
+    PRUint32 ssl3_timeout,
+    const char *directory,
+    int maxCacheEntries,
+    int maxCertCacheEntries,
+    int maxSrvNameCacheEntries,
+    PRBool enableMPCache)
+{
+    if (!enableMPCache) {
+        ssl_InitSessionCacheLocks(PR_FALSE);
+        return ssl_ConfigServerSessionIDCacheInstanceWithOpt(&globalCache,
+                                                             ssl3_timeout, directory, PR_FALSE,
+                                                             maxCacheEntries, maxCertCacheEntries, maxSrvNameCacheEntries);
+    } else {
+        return ssl_ConfigMPServerSIDCacheWithOpt(ssl3_timeout, directory,
+                                                 maxCacheEntries, maxCertCacheEntries, maxSrvNameCacheEntries);
+    }
+}
+
+SECStatus
+SSL_InheritMPServerSIDCacheInstance(cacheDesc *cache, const char *envString)
+{
+    unsigned char *decoString = NULL;
+    char *fmString = NULL;
+    char *myEnvString = NULL;
+    unsigned int decoLen;
+    inheritance inherit;
+    cacheDesc my;
+#ifdef WINNT
+    sidCacheLock *newLocks;
+    int locks_initialized = 0;
+    int locks_to_initialize = 0;
+#endif
+    SECStatus status = ssl_Init();
+
+    if (status != SECSuccess) {
+        return status;
+    }
+
+    myPid = SSL_GETPID();
+
+    /* If this child was created by fork(), and not by exec() on unix,
+    ** then isMultiProcess will already be set.
+    ** If not, we'll set it below.
+    */
+    if (isMultiProcess) {
+        if (cache && cache->sharedCache) {
+            cache->sharedCache->everInherited = PR_TRUE;
+        }
+        return SECSuccess; /* already done. */
+    }
+
+    ssl_InitSessionCacheLocks(PR_FALSE);
+
+    ssl_sid_lookup = ServerSessionIDLookup;
+    ssl_sid_cache = ServerSessionIDCache;
+    ssl_sid_uncache = ServerSessionIDUncache;
+
+    if (!envString) {
+        envString = PR_GetEnvSecure(envVarName);
+        if (!envString) {
+            PORT_SetError(SEC_ERROR_LIBRARY_FAILURE);
+            return SECFailure;
+        }
+    }
+    myEnvString = PORT_Strdup(envString);
+    if (!myEnvString)
+        return SECFailure;
+    fmString = strchr(myEnvString, ',');
+    if (!fmString)
+        goto loser;
+    *fmString++ = 0;
+
+    decoString = ATOB_AsciiToData(myEnvString, &decoLen);
+    if (!decoString) {
+        goto loser;
+    }
+    if (decoLen != sizeof inherit) {
+        goto loser;
+    }
+
+    PORT_Memcpy(&inherit, decoString, sizeof inherit);
+
+    if (strlen(fmString) != inherit.fmStrLen) {
+        goto loser;
+    }
+
+    memset(cache, 0, sizeof *cache);
+    cache->cacheMemSize = inherit.cacheMemSize;
+
+    /* Create cache */
+    cache->cacheMemMap = PR_ImportFileMapFromString(fmString);
+    if (!cache->cacheMemMap) {
+        goto loser;
+    }
+    cache->cacheMem = PR_MemMap(cache->cacheMemMap, 0, cache->cacheMemSize);
+    if (!cache->cacheMem) {
+        goto loser;
+    }
+    cache->sharedCache = (cacheDesc *)cache->cacheMem;
+
+    if (cache->sharedCache->cacheMemSize != cache->cacheMemSize) {
+        goto loser;
+    }
+
+    /* We're now going to overwrite the local cache instance with the
+    ** shared copy of the cache struct, then update several values in
+    ** the local cache using the values for cache->cacheMemMap and
+    ** cache->cacheMem computed just above.  So, we copy cache into
+    ** the automatic variable "my", to preserve the variables while
+    ** cache is overwritten.
+    */
+    my = *cache;                                      /* save values computed above. */
+    memcpy(cache, cache->sharedCache, sizeof *cache); /* overwrite */
+
+    /* Fix pointers in our private copy of cache descriptor to point to
+    ** spaces in shared memory, whose address is now in "my".
+    */
+    cache->sidCacheLocks = (sidCacheLock *)(my.cacheMem + (ptrdiff_t)cache->sidCacheLocks);
+    cache->keyCacheLock = (sidCacheLock *)(my.cacheMem + (ptrdiff_t)cache->keyCacheLock);
+    cache->certCacheLock = (sidCacheLock *)(my.cacheMem + (ptrdiff_t)cache->certCacheLock);
+    cache->srvNameCacheLock = (sidCacheLock *)(my.cacheMem + (ptrdiff_t)cache->srvNameCacheLock);
+    cache->sidCacheSets = (sidCacheSet *)(my.cacheMem + (ptrdiff_t)cache->sidCacheSets);
+    cache->sidCacheData = (sidCacheEntry *)(my.cacheMem + (ptrdiff_t)cache->sidCacheData);
+    cache->certCacheData = (certCacheEntry *)(my.cacheMem + (ptrdiff_t)cache->certCacheData);
+    cache->keyCacheData = (SSLWrappedSymWrappingKey *)(my.cacheMem + (ptrdiff_t)cache->keyCacheData);
+    cache->ticketKeyNameSuffix = (PRUint8 *)(my.cacheMem + (ptrdiff_t)cache->ticketKeyNameSuffix);
+    cache->ticketEncKey = (encKeyCacheEntry *)(my.cacheMem + (ptrdiff_t)cache->ticketEncKey);
+    cache->ticketMacKey = (encKeyCacheEntry *)(my.cacheMem + (ptrdiff_t)cache->ticketMacKey);
+    cache->ticketKeysValid = (PRUint32 *)(my.cacheMem + (ptrdiff_t)cache->ticketKeysValid);
+    cache->srvNameCacheData = (srvNameCacheEntry *)(my.cacheMem + (ptrdiff_t)cache->srvNameCacheData);
+
+    cache->cacheMemMap = my.cacheMemMap;
+    cache->cacheMem = my.cacheMem;
+    cache->sharedCache = (cacheDesc *)cache->cacheMem;
+
+#ifdef WINNT
+    /*  On Windows NT we need to "fix" the sidCacheLocks here to support fibers
+    **  When NT fibers are used in a multi-process server, a second level of
+    **  locking is needed to prevent a deadlock, in case a fiber acquires the
+    **  cross-process mutex, yields, and another fiber is later scheduled on
+    **  the same native thread and tries to acquire the cross-process mutex.
+    **  We do this by using a PRLock in the sslMutex. However, it is stored in
+    **  shared memory as part of sidCacheLocks, and we don't want to overwrite
+    **  the PRLock of the parent process. So we need to make new, private
+    **  copies of sidCacheLocks before modifying the sslMutex with our own
+    **  PRLock
+    */
+
+    /* note from jpierre : this should be free'd in child processes when
+    ** a function is added to delete the SSL session cache in the future.
+    */
+    locks_to_initialize = cache->numSIDCacheLocks + 3;
+    newLocks = PORT_NewArray(sidCacheLock, locks_to_initialize);
+    if (!newLocks)
+        goto loser;
+    /* copy the old locks */
+    memcpy(newLocks, cache->sidCacheLocks,
+           locks_to_initialize * sizeof(sidCacheLock));
+    cache->sidCacheLocks = newLocks;
+    /* fix the locks */
+    for (; locks_initialized < locks_to_initialize; ++locks_initialized) {
+        /* now, make a local PRLock in this sslMutex for this child process */
+        SECStatus err;
+        err = sslMutex_2LevelInit(&newLocks[locks_initialized].mutex);
+        if (err != SECSuccess) {
+            cache->numSIDCacheLocksInitialized = locks_initialized;
+            goto loser;
+        }
+    }
+    cache->numSIDCacheLocksInitialized = locks_initialized;
+
+    /* also fix the key and cert cache which use the last 2 lock entries */
+    cache->keyCacheLock = cache->sidCacheLocks + cache->numSIDCacheLocks;
+    cache->certCacheLock = cache->keyCacheLock + 1;
+    cache->srvNameCacheLock = cache->certCacheLock + 1;
+#endif
+
+    PORT_Free(myEnvString);
+    PORT_Free(decoString);
+
+    /* mark that we have inherited this. */
+    cache->sharedCache->everInherited = PR_TRUE;
+    isMultiProcess = PR_TRUE;
+
+    return SECSuccess;
+
+loser:
+    PORT_Free(myEnvString);
+    if (decoString)
+        PORT_Free(decoString);
+    CloseCache(cache);
+    PORT_SetError(SEC_ERROR_LIBRARY_FAILURE);
+    return SECFailure;
+}
+
+SECStatus
+SSL_InheritMPServerSIDCache(const char *envString)
+{
+    return SSL_InheritMPServerSIDCacheInstance(&globalCache, envString);
+}
+
+#if defined(XP_UNIX) || defined(XP_BEOS)
+
+#define SID_LOCK_EXPIRATION_TIMEOUT 30 /* seconds */
+
+static void
+LockPoller(void *arg)
+{
+    cacheDesc *cache = (cacheDesc *)arg;
+    cacheDesc *sharedCache = cache->sharedCache;
+    sidCacheLock *pLock;
+    PRIntervalTime timeout;
+    PRUint32 now;
+    PRUint32 then;
+    int locks_polled = 0;
+    int locks_to_poll = cache->numSIDCacheLocks + 2;
+    PRUint32 expiration = cache->mutexTimeout;
+
+    timeout = PR_SecondsToInterval(expiration);
+    while (!sharedCache->stopPolling) {
+        PR_Sleep(timeout);
+        if (sharedCache->stopPolling)
+            break;
+
+        now = ssl_Time();
+        then = now - expiration;
+        for (pLock = cache->sidCacheLocks, locks_polled = 0;
+             locks_to_poll > locks_polled && !sharedCache->stopPolling;
+             ++locks_polled, ++pLock) {
+            pid_t pid;
+
+            if (pLock->timeStamp < then &&
+                pLock->timeStamp != 0 &&
+                (pid = pLock->pid) != 0) {
+
+                /* maybe we should try the lock? */
+                int result = kill(pid, 0);
+                if (result < 0 && errno == ESRCH) {
+                    SECStatus rv;
+                    /* No process exists by that pid any more.
+                    ** Treat this mutex as abandoned.
+                    */
+                    pLock->timeStamp = now;
+                    pLock->pid = 0;
+                    rv = sslMutex_Unlock(&pLock->mutex);
+                    if (rv != SECSuccess) {
+                        /* Now what? */
+                    }
+                }
+            }
+        } /* end of loop over locks */
+    }     /* end of entire polling loop */
+}
+
+/* Launch thread to poll cache for expired locks */
+static SECStatus
+LaunchLockPoller(cacheDesc *cache)
+{
+    const char *timeoutString;
+    PRThread *pollerThread;
+
+    cache->mutexTimeout = SID_LOCK_EXPIRATION_TIMEOUT;
+    timeoutString = PR_GetEnvSecure("NSS_SSL_SERVER_CACHE_MUTEX_TIMEOUT");
+    if (timeoutString) {
+        long newTime = strtol(timeoutString, 0, 0);
+        if (newTime == 0)
+            return SECSuccess; /* application doesn't want poller thread */
+        if (newTime > 0)
+            cache->mutexTimeout = (PRUint32)newTime;
+        /* if error (newTime < 0) ignore it and use default */
+    }
+
+    pollerThread =
+        PR_CreateThread(PR_USER_THREAD, LockPoller, cache, PR_PRIORITY_NORMAL,
+                        PR_GLOBAL_THREAD, PR_JOINABLE_THREAD, 0);
+    if (!pollerThread) {
+        return SECFailure;
+    }
+    cache->poller = pollerThread;
+    return SECSuccess;
+}
+
+/* Stop the thread that polls cache for expired locks */
+static SECStatus
+StopLockPoller(cacheDesc *cache)
+{
+    if (!cache->poller) {
+        return SECSuccess;
+    }
+    cache->sharedCache->stopPolling = PR_TRUE;
+    if (PR_Interrupt(cache->poller) != PR_SUCCESS) {
+        return SECFailure;
+    }
+    if (PR_JoinThread(cache->poller) != PR_SUCCESS) {
+        return SECFailure;
+    }
+    cache->poller = NULL;
+    return SECSuccess;
+}
+#endif
+
+/************************************************************************
+ *  Code dealing with shared wrapped symmetric wrapping keys below      *
+ ************************************************************************/
+
+/* If now is zero, it implies that the lock is not held, and must be
+** aquired here.
+*/
+static PRBool
+getSvrWrappingKey(PRInt32 symWrapMechIndex,
+                  SSLAuthType authType,
+                  SSLWrappedSymWrappingKey *wswk,
+                  cacheDesc *cache,
+                  PRUint32 lockTime)
+{
+    PRUint32 ndx = (authType * SSL_NUM_WRAP_MECHS) + symWrapMechIndex;
+    SSLWrappedSymWrappingKey *pwswk = cache->keyCacheData + ndx;
+    PRUint32 now = 0;
+    PRBool rv = PR_FALSE;
+
+    if (!cache->cacheMem) { /* cache is uninitialized */
+        PORT_SetError(SSL_ERROR_SERVER_CACHE_NOT_CONFIGURED);
+        return rv;
+    }
+    if (!lockTime) {
+        lockTime = now = LockSidCacheLock(cache->keyCacheLock, now);
+        if (!lockTime) {
+            return rv;
+        }
+    }
+    if (pwswk->authType == authType &&
+        pwswk->symWrapMechIndex == symWrapMechIndex &&
+        pwswk->wrappedSymKeyLen != 0) {
+        *wswk = *pwswk;
+        rv = PR_TRUE;
+    }
+    if (now) {
+        UnlockSidCacheLock(cache->keyCacheLock);
+    }
+    return rv;
+}
+
+PRBool
+ssl_GetWrappingKey(PRInt32 symWrapMechIndex,
+                   SSLAuthType authType,
+                   SSLWrappedSymWrappingKey *wswk)
+{
+    PRBool rv;
+
+    PORT_Assert((unsigned)authType < ssl_auth_size);
+    PORT_Assert((unsigned)symWrapMechIndex < SSL_NUM_WRAP_MECHS);
+    if ((unsigned)authType < ssl_auth_size &&
+        (unsigned)symWrapMechIndex < SSL_NUM_WRAP_MECHS) {
+        rv = getSvrWrappingKey(symWrapMechIndex, authType, wswk,
+                               &globalCache, 0);
+    } else {
+        rv = PR_FALSE;
+    }
+
+    return rv;
+}
+
+/* Wrap and cache a session ticket key. */
+static PRBool
+WrapTicketKey(SECKEYPublicKey *svrPubKey, PK11SymKey *symKey,
+              const char *keyName, encKeyCacheEntry *cacheEntry)
+{
+    SECItem wrappedKey = { siBuffer, NULL, 0 };
+
+    wrappedKey.len = SECKEY_PublicKeyStrength(svrPubKey);
+    PORT_Assert(wrappedKey.len <= sizeof(cacheEntry->bytes));
+    if (wrappedKey.len > sizeof(cacheEntry->bytes))
+        return PR_FALSE;
+    wrappedKey.data = cacheEntry->bytes;
+
+    if (PK11_PubWrapSymKey(CKM_RSA_PKCS, svrPubKey, symKey, &wrappedKey) !=
+        SECSuccess) {
+        SSL_DBG(("%d: SSL[%s]: Unable to wrap session ticket %s.",
+                 SSL_GETPID(), "unknown", keyName));
+        return PR_FALSE;
+    }
+    cacheEntry->length = wrappedKey.len;
+    return PR_TRUE;
+}
+
+static PRBool
+GenerateTicketKeys(void *pwArg, unsigned char *keyName, PK11SymKey **aesKey,
+                   PK11SymKey **macKey)
+{
+    PK11SlotInfo *slot;
+    CK_MECHANISM_TYPE mechanismArray[2];
+    PK11SymKey *aesKeyTmp = NULL;
+    PK11SymKey *macKeyTmp = NULL;
+    cacheDesc *cache = &globalCache;
+    PRUint8 ticketKeyNameSuffixLocal[SESS_TICKET_KEY_VAR_NAME_LEN];
+    PRUint8 *ticketKeyNameSuffix;
+
+    if (!cache->cacheMem) {
+        /* cache is not initalized. Use stack buffer */
+        ticketKeyNameSuffix = ticketKeyNameSuffixLocal;
+    } else {
+        ticketKeyNameSuffix = cache->ticketKeyNameSuffix;
+    }
+
+    if (PK11_GenerateRandom(ticketKeyNameSuffix,
+                            SESS_TICKET_KEY_VAR_NAME_LEN) !=
+        SECSuccess) {
+        SSL_DBG(("%d: SSL[%s]: Unable to generate random key name bytes.",
+                 SSL_GETPID(), "unknown"));
+        goto loser;
+    }
+
+    mechanismArray[0] = CKM_AES_CBC;
+    mechanismArray[1] = CKM_SHA256_HMAC;
+
+    slot = PK11_GetBestSlotMultiple(mechanismArray, 2, pwArg);
+    if (slot) {
+        aesKeyTmp = PK11_KeyGen(slot, mechanismArray[0], NULL,
+                                AES_256_KEY_LENGTH, pwArg);
+        macKeyTmp = PK11_KeyGen(slot, mechanismArray[1], NULL,
+                                SHA256_LENGTH, pwArg);
+        PK11_FreeSlot(slot);
+    }
+
+    if (aesKeyTmp == NULL || macKeyTmp == NULL) {
+        SSL_DBG(("%d: SSL[%s]: Unable to generate session ticket keys.",
+                 SSL_GETPID(), "unknown"));
+        goto loser;
+    }
+    PORT_Memcpy(keyName, ticketKeyNameSuffix, SESS_TICKET_KEY_VAR_NAME_LEN);
+    *aesKey = aesKeyTmp;
+    *macKey = macKeyTmp;
+    return PR_TRUE;
+
+loser:
+    if (aesKeyTmp)
+        PK11_FreeSymKey(aesKeyTmp);
+    if (macKeyTmp)
+        PK11_FreeSymKey(macKeyTmp);
+    return PR_FALSE;
+}
+
+static PRBool
+GenerateAndWrapTicketKeys(SECKEYPublicKey *svrPubKey, void *pwArg,
+                          unsigned char *keyName, PK11SymKey **aesKey,
+                          PK11SymKey **macKey)
+{
+    PK11SymKey *aesKeyTmp = NULL;
+    PK11SymKey *macKeyTmp = NULL;
+    cacheDesc *cache = &globalCache;
+
+    if (!GenerateTicketKeys(pwArg, keyName, &aesKeyTmp, &macKeyTmp)) {
+        goto loser;
+    }
+
+    if (cache->cacheMem) {
+        /* Export the keys to the shared cache in wrapped form. */
+        if (!WrapTicketKey(svrPubKey, aesKeyTmp, "enc key", cache->ticketEncKey))
+            goto loser;
+        if (!WrapTicketKey(svrPubKey, macKeyTmp, "mac key", cache->ticketMacKey))
+            goto loser;
+    }
+    *aesKey = aesKeyTmp;
+    *macKey = macKeyTmp;
+    return PR_TRUE;
+
+loser:
+    if (aesKeyTmp)
+        PK11_FreeSymKey(aesKeyTmp);
+    if (macKeyTmp)
+        PK11_FreeSymKey(macKeyTmp);
+    return PR_FALSE;
+}
+
+static PRBool
+UnwrapCachedTicketKeys(SECKEYPrivateKey *svrPrivKey, unsigned char *keyName,
+                       PK11SymKey **aesKey, PK11SymKey **macKey)
+{
+    SECItem wrappedKey = { siBuffer, NULL, 0 };
+    PK11SymKey *aesKeyTmp = NULL;
+    PK11SymKey *macKeyTmp = NULL;
+    cacheDesc *cache = &globalCache;
+
+    wrappedKey.data = cache->ticketEncKey->bytes;
+    wrappedKey.len = cache->ticketEncKey->length;
+    PORT_Assert(wrappedKey.len <= sizeof(cache->ticketEncKey->bytes));
+    aesKeyTmp = PK11_PubUnwrapSymKey(svrPrivKey, &wrappedKey,
+                                     CKM_AES_CBC, CKA_DECRYPT, 0);
+
+    wrappedKey.data = cache->ticketMacKey->bytes;
+    wrappedKey.len = cache->ticketMacKey->length;
+    PORT_Assert(wrappedKey.len <= sizeof(cache->ticketMacKey->bytes));
+    macKeyTmp = PK11_PubUnwrapSymKey(svrPrivKey, &wrappedKey,
+                                     CKM_SHA256_HMAC, CKA_SIGN, 0);
+
+    if (aesKeyTmp == NULL || macKeyTmp == NULL) {
+        SSL_DBG(("%d: SSL[%s]: Unable to unwrap session ticket keys.",
+                 SSL_GETPID(), "unknown"));
+        goto loser;
+    }
+    SSL_DBG(("%d: SSL[%s]: Successfully unwrapped session ticket keys.",
+             SSL_GETPID(), "unknown"));
+
+    PORT_Memcpy(keyName, cache->ticketKeyNameSuffix,
+                SESS_TICKET_KEY_VAR_NAME_LEN);
+    *aesKey = aesKeyTmp;
+    *macKey = macKeyTmp;
+    return PR_TRUE;
+
+loser:
+    if (aesKeyTmp)
+        PK11_FreeSymKey(aesKeyTmp);
+    if (macKeyTmp)
+        PK11_FreeSymKey(macKeyTmp);
+    return PR_FALSE;
+}
+
+PRBool
+ssl_GetSessionTicketKeys(SECKEYPrivateKey *svrPrivKey,
+                         SECKEYPublicKey *svrPubKey, void *pwArg,
+                         unsigned char *keyName, PK11SymKey **aesKey,
+                         PK11SymKey **macKey)
+{
+    PRUint32 now = 0;
+    PRBool rv = PR_FALSE;
+    PRBool keysGenerated = PR_FALSE;
+    cacheDesc *cache = &globalCache;
+
+    if (!cache->cacheMem) {
+        /* cache is uninitialized. Generate keys and return them
+         * without caching. */
+        return GenerateTicketKeys(pwArg, keyName, aesKey, macKey);
+    }
+
+    now = LockSidCacheLock(cache->keyCacheLock, now);
+    if (!now)
+        return rv;
+
+    if (!*(cache->ticketKeysValid)) {
+        /* Keys do not exist, create them. */
+        if (!GenerateAndWrapTicketKeys(svrPubKey, pwArg, keyName,
+                                       aesKey, macKey))
+            goto loser;
+        keysGenerated = PR_TRUE;
+        *(cache->ticketKeysValid) = 1;
+    }
+
+    rv = PR_TRUE;
+
+loser:
+    UnlockSidCacheLock(cache->keyCacheLock);
+    if (rv && !keysGenerated)
+        rv = UnwrapCachedTicketKeys(svrPrivKey, keyName, aesKey, macKey);
+    return rv;
+}
+
+/* The caller passes in the new value it wants
+ * to set.  This code tests the wrapped sym key entry in the shared memory.
+ * If it is uninitialized, this function writes the caller's value into
+ * the disk entry, and returns false.
+ * Otherwise, it overwrites the caller's wswk with the value obtained from
+ * the disk, and returns PR_TRUE.
+ * This is all done while holding the locks/mutexes necessary to make
+ * the operation atomic.
+ */
+PRBool
+ssl_SetWrappingKey(SSLWrappedSymWrappingKey *wswk)
+{
+    cacheDesc *cache = &globalCache;
+    PRBool rv = PR_FALSE;
+    SSLAuthType authType = wswk->authType;
+    /* type of keys used to wrap SymWrapKey*/
+    PRInt32 symWrapMechIndex = wswk->symWrapMechIndex;
+    PRUint32 ndx;
+    PRUint32 now = 0;
+    SSLWrappedSymWrappingKey myWswk;
+
+    if (!cache->cacheMem) { /* cache is uninitialized */
+        PORT_SetError(SSL_ERROR_SERVER_CACHE_NOT_CONFIGURED);
+        return 0;
+    }
+
+    PORT_Assert((unsigned)authType < ssl_auth_size);
+    if ((unsigned)authType >= ssl_auth_size)
+        return 0;
+
+    PORT_Assert((unsigned)symWrapMechIndex < SSL_NUM_WRAP_MECHS);
+    if ((unsigned)symWrapMechIndex >= SSL_NUM_WRAP_MECHS)
+        return 0;
+
+    ndx = (authType * SSL_NUM_WRAP_MECHS) + symWrapMechIndex;
+    PORT_Memset(&myWswk, 0, sizeof myWswk); /* eliminate UMRs. */
+
+    now = LockSidCacheLock(cache->keyCacheLock, now);
+    if (now) {
+        rv = getSvrWrappingKey(wswk->symWrapMechIndex, wswk->authType,
+                               &myWswk, cache, now);
+        if (rv) {
+            /* we found it on disk, copy it out to the caller. */
+            PORT_Memcpy(wswk, &myWswk, sizeof *wswk);
+        } else {
+            /* Wasn't on disk, and we're still holding the lock, so write it. */
+            cache->keyCacheData[ndx] = *wswk;
+        }
+        UnlockSidCacheLock(cache->keyCacheLock);
+    }
+    return rv;
+}
+
+#else /* MAC version or other platform */
+
+#include "seccomon.h"
+#include "cert.h"
+#include "ssl.h"
+#include "sslimpl.h"
+
+SECStatus
+SSL_ConfigServerSessionIDCache(int maxCacheEntries,
+                               PRUint32 ssl2_timeout,
+                               PRUint32 ssl3_timeout,
+                               const char *directory)
+{
+    PR_ASSERT(!"SSL servers are not supported on this platform. (SSL_ConfigServerSessionIDCache)");
+    return SECFailure;
+}
+
+SECStatus
+SSL_ConfigMPServerSIDCache(int maxCacheEntries,
+                           PRUint32 ssl2_timeout,
+                           PRUint32 ssl3_timeout,
+                           const char *directory)
+{
+    PR_ASSERT(!"SSL servers are not supported on this platform. (SSL_ConfigMPServerSIDCache)");
+    return SECFailure;
+}
+
+SECStatus
+SSL_InheritMPServerSIDCache(const char *envString)
+{
+    PR_ASSERT(!"SSL servers are not supported on this platform. (SSL_InheritMPServerSIDCache)");
+    return SECFailure;
+}
+
+PRBool
+ssl_GetWrappingKey(PRInt32 symWrapMechIndex,
+                   SSLAuthType authType,
+                   SSLWrappedSymWrappingKey *wswk)
+{
+    PRBool rv = PR_FALSE;
+    PR_ASSERT(!"SSL servers are not supported on this platform. (ssl_GetWrappingKey)");
+    return rv;
+}
+
+/* This is a kind of test-and-set.  The caller passes in the new value it wants
+ * to set.  This code tests the wrapped sym key entry in the shared memory.
+ * If it is uninitialized, this function writes the caller's value into
+ * the disk entry, and returns false.
+ * Otherwise, it overwrites the caller's wswk with the value obtained from
+ * the disk, and returns PR_TRUE.
+ * This is all done while holding the locks/mutexes necessary to make
+ * the operation atomic.
+ */
+PRBool
+ssl_SetWrappingKey(SSLWrappedSymWrappingKey *wswk)
+{
+    PRBool rv = PR_FALSE;
+    PR_ASSERT(!"SSL servers are not supported on this platform. (ssl_SetWrappingKey)");
+    return rv;
+}
+
+PRUint32
+SSL_GetMaxServerCacheLocks(void)
+{
+    PR_ASSERT(!"SSL servers are not supported on this platform. (SSL_GetMaxServerCacheLocks)");
+    return -1;
+}
+
+SECStatus
+SSL_SetMaxServerCacheLocks(PRUint32 maxLocks)
+{
+    PR_ASSERT(!"SSL servers are not supported on this platform. (SSL_SetMaxServerCacheLocks)");
+    return SECFailure;
+}
+
+#endif /* XP_UNIX || XP_WIN32 */