/*
- * Copyright (c) 2000-2004 Apple Computer, Inc. All Rights Reserved.
+ * Copyright (c) 2000-2004,2009 Apple Inc. All Rights Reserved.
*
* @APPLE_LICENSE_HEADER_START@
*
- * Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved.
- *
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
//
-// server - the actual SecurityServer server object
+// server - securityd main server object
//
-#include <securityd_client/ucsp.h> // knowledge of mig message sizes
+#include <securityd_client/ucsp.h> // MIG ucsp service
+#include "self.h" // MIG self service
+#include <security_utilities/logging.h>
+#include <security_cdsa_client/mdsclient.h>
#include "server.h"
#include "session.h"
#include "acls.h"
#include "notifications.h"
+#include "child.h"
#include <mach/mach_error.h>
+#include <security_utilities/ccaudit.h>
+#include "pcscmonitor.h"
+
+#include "agentquery.h"
+
using namespace MachPlusPlus;
{
}
+
//
// Construct the server object
//
mBootstrapName(bootstrapName),
mCSPModule(gGuidAppleCSP, mCssm), mCSP(mCSPModule),
mAuthority(authority),
- mCodeSignatures(signatures)
+ mCodeSignatures(signatures),
+ mVerbosity(0),
+ mWaitForClients(true), mShuttingDown(false)
{
+ // make me eternal (in the object mesh)
+ ref();
+
// engage the subsidiary port handler for sleep notifications
- add(sleepWatcher);
+ add(sleepWatcher);
}
// by calling Server::connection() [no argument] until it is released by
// calling Connection::endWork().
//
-Connection &Server::connection(mach_port_t port)
+Connection &Server::connection(mach_port_t port, audit_token_t &auditToken)
{
Server &server = active();
StLock<Mutex> _(server);
Connection *conn = server.mConnections.get(port, CSSM_ERRCODE_INVALID_CONTEXT_HANDLE);
+ conn->process().checkSession(auditToken);
active().mCurrentConnection() = conn;
- conn->beginWork();
+ conn->beginWork(auditToken);
return *conn;
}
return *conn;
}
-void Server::requestComplete()
+void Server::requestComplete(CSSM_RETURN &rcode)
{
// note: there may not be an active connection if connection setup failed
if (RefPointer<Connection> &conn = active().mCurrentConnection()) {
- conn->endWork();
+ conn->endWork(rcode);
conn = NULL;
}
IFDUMPING("state", NodeCore::dumpAll());
RefPointer<Key> Server::key(KeyHandle key)
{
- return HandleObject::findRef<Key>(key, CSSMERR_CSP_INVALID_KEY_REFERENCE);
+ return U32HandleObject::findRef<Key>(key, CSSMERR_CSP_INVALID_KEY_REFERENCE);
}
RefPointer<Database> Server::database(DbHandle db)
{
- RefPointer<Database> database =
- HandleObject::findRef<Database>(db, CSSMERR_DL_INVALID_DB_HANDLE);
- if (database->process() != process())
- CssmError::throwMe(CSSMERR_DL_INVALID_DB_HANDLE);
- return database;
+ return find<Database>(db, CSSMERR_DL_INVALID_DB_HANDLE);
}
RefPointer<KeychainDatabase> Server::keychain(DbHandle db)
{
- RefPointer<KeychainDatabase> keychain =
- HandleObject::findRef<KeychainDatabase>(db, CSSMERR_DL_INVALID_DB_HANDLE);
- if (keychain->process() != process())
- CssmError::throwMe(CSSMERR_DL_INVALID_DB_HANDLE);
- return keychain;
+ return find<KeychainDatabase>(db, CSSMERR_DL_INVALID_DB_HANDLE);
}
-RefPointer<Database> Server::optionalDatabase(DbHandle db)
+RefPointer<Database> Server::optionalDatabase(DbHandle db, bool persistent)
{
- if (db == noDb)
- return &process().localStore();
- else
+ if (persistent && db != noDb)
return database(db);
+ else
+ return &process().localStore();
}
//
// Locate an ACL bearer (database or key) by handle
+// The handle might be used across IPC, so we clamp it accordingly
//
-SecurityServerAcl &Server::aclBearer(AclKind kind, CSSM_HANDLE handle)
+AclSource &Server::aclBearer(AclKind kind, U32HandleObject::Handle handle)
{
- SecurityServerAcl &bearer =
- HandleObject::find<SecurityServerAcl>(handle, CSSMERR_CSSM_INVALID_ADDIN_HANDLE);
- if (kind != bearer.kind())
+ AclSource &bearer = U32HandleObject::find<AclSource>(handle, CSSMERR_CSSM_INVALID_ADDIN_HANDLE);
+ if (kind != bearer.acl().aclKind())
CssmError::throwMe(CSSMERR_CSSM_INVALID_HANDLE_USAGE);
return bearer;
}
{
MachServer::run(0x10000,
MACH_RCV_TRAILER_TYPE(MACH_MSG_TRAILER_FORMAT_0) |
- MACH_RCV_TRAILER_ELEMENTS(MACH_RCV_TRAILER_SENDER));
+ MACH_RCV_TRAILER_ELEMENTS(MACH_RCV_TRAILER_AUDIT));
+}
+
+
+//
+// Handle thread overflow. MachServer will call this if it has hit its thread
+// limit and yet still needs another thread.
+//
+void Server::threadLimitReached(UInt32 limit)
+{
+ Syslog::notice("securityd has reached its thread limit (%ld) - service deadlock is possible",
+ limit);
}
//
// The primary server run-loop function.
-// Invokes the MIG-generated main dispatch function (ucsp_server).
+// Invokes the MIG-generated main dispatch function (ucsp_server), as well
+// as the self-send dispatch (self_server).
// For debug builds, look up request names in a MIG-generated table
// for better debug-log messages.
//
boolean_t ucsp_server(mach_msg_header_t *, mach_msg_header_t *);
+boolean_t self_server(mach_msg_header_t *, mach_msg_header_t *);
-#if defined(NDEBUG)
boolean_t Server::handle(mach_msg_header_t *in, mach_msg_header_t *out)
{
- return ucsp_server(in, out);
+ return ucsp_server(in, out) || self_server(in, out);
}
-#else //NDEBUG
-
-static const struct IPCName { const char *name; int ipc; } ipcNames[] =
- { subsystem_to_name_map_ucsp }; // macro generated by MIG, from ucsp.h
-
-boolean_t Server::handle(mach_msg_header_t *in, mach_msg_header_t *out)
-{
- const int first = ipcNames[0].ipc;
- const char *name = (in->msgh_id >= first && in->msgh_id < first + ucsp_MSG_COUNT) ?
- ipcNames[in->msgh_id - first].name : "OUT OF BOUNDS";
- secdebug("SSreq", "begin %s (%d)", name, in->msgh_id);
- boolean_t result = ucsp_server(in, out);
- secdebug("SSreq", "end %s (%d)", name, in->msgh_id);
- return result;
-}
-
-#endif //NDEBUG
-
//
// Set up a new Connection. This establishes the environment (process et al) as needed
// Everything at and below that level is constructed. This is straight-forward except
// in the case of session re-initialization (see below).
//
-void Server::setupConnection(ConnectLevel type, Port servicePort, Port replyPort, Port taskPort,
- const security_token_t &securityToken, const ClientSetupInfo *info, const char *identity)
+void Server::setupConnection(ConnectLevel type, Port replyPort, Port taskPort,
+ const audit_token_t &auditToken, const ClientSetupInfo *info)
{
+ AuditToken audit(auditToken);
+
// first, make or find the process based on task port
StLock<Mutex> _(*this);
RefPointer<Process> &proc = mProcesses[taskPort];
- if (type == connectNewSession && proc) {
- // The client has talked to us before and now wants to create a new session.
- proc->changeSession(servicePort);
+ if (proc && proc->session().sessionId() != audit.sessionId())
+ proc->changeSession(audit.sessionId());
+ if (proc && type == connectNewProcess) {
+ // the client has amnesia - reset it
+ assert(info);
+ proc->reset(taskPort, info, audit);
+ proc->changeSession(audit.sessionId());
}
if (!proc) {
if (type == connectNewThread) // client error (or attack)
CssmError::throwMe(CSSM_ERRCODE_INTERNAL_ERROR);
- assert(info && identity);
- proc = new Process(servicePort, taskPort, info, identity,
- securityToken.val[0], securityToken.val[1]);
+ assert(info);
+ proc = new Process(taskPort, info, audit);
notifyIfDead(taskPort);
+ mPids[proc->pid()] = proc;
}
// now, establish a connection and register it in the server
//
void Server::notifyDeadName(Port port)
{
- StLock<Mutex> _(*this);
+ // We need the lock to get a proper iterator on mConnections or mProcesses,
+ // but must release it before we call abort or kill, as these might take
+ // unbounded time, including calls out to token daemons etc.
+
+ StLock<Mutex> serverLock(*this);
secdebug("SSports", "port %d is dead", port.port());
// is it a connection?
PortMap<Connection>::iterator conIt = mConnections.find(port);
if (conIt != mConnections.end()) {
- conIt->second->abort();
+ SECURITYD_PORTS_DEAD_CONNECTION(port);
+ RefPointer<Connection> con = conIt->second;
mConnections.erase(conIt);
+ serverLock.unlock();
+ con->abort();
return;
}
// is it a process?
PortMap<Process>::iterator procIt = mProcesses.find(port);
if (procIt != mProcesses.end()) {
- procIt->second->kill();
+ SECURITYD_PORTS_DEAD_PROCESS(port);
+ RefPointer<Process> proc = procIt->second;
+ mPids.erase(proc->pid());
mProcesses.erase(procIt);
+ serverLock.unlock();
+ // The kill may take some time; make sure there is a spare thread around
+ // to prevent deadlocks
+ StLock<MachServer, &Server::busy, &Server::idle> _(*this);
+ proc->kill();
return;
}
- // is it a notification client?
- if (Listener::remove(port))
- return;
-
+ // well, what IS IT?!
+ SECURITYD_PORTS_DEAD_ORPHAN(port);
secdebug("server", "spurious dead port notification for port %d", port.port());
}
//
void Server::notifyNoSenders(Port port, mach_port_mscount_t)
{
- secdebug("SSports", "port %d no senders", port.port());
- Session::destroy(port);
+ SECURITYD_PORTS_DEAD_SESSION(port);
+}
+
+
+//
+// Handling signals.
+// These are sent as Mach messages from ourselves to escape the limitations of
+// the signal handler environment.
+//
+kern_return_t self_server_handleSignal(mach_port_t sport,
+ mach_port_t taskPort, int sig)
+{
+ try {
+ SECURITYD_SIGNAL_HANDLED(sig);
+ if (taskPort != mach_task_self()) {
+ Syslog::error("handleSignal: received from someone other than myself");
+ return KERN_SUCCESS;
+ }
+ switch (sig) {
+ case SIGCHLD:
+ ServerChild::checkChildren();
+ break;
+ case SIGINT:
+ SECURITYD_SHUTDOWN_NOW();
+ Syslog::notice("securityd terminated due to SIGINT");
+ _exit(0);
+ case SIGTERM:
+ Server::active().beginShutdown();
+ break;
+ case SIGPIPE:
+ fprintf(stderr, "securityd ignoring SIGPIPE received");
+ break;
+
+#if defined(DEBUGDUMP)
+ case SIGUSR1:
+ NodeCore::dumpAll();
+ break;
+#endif //DEBUGDUMP
+
+ case SIGUSR2:
+ {
+ extern PCSCMonitor *gPCSC;
+ gPCSC->startSoftTokens();
+ break;
+ }
+
+ default:
+ assert(false);
+ }
+ } catch(...) {
+ secdebug("SS", "exception handling a signal (ignored)");
+ }
+ mach_port_deallocate(mach_task_self(), taskPort);
+ return KERN_SUCCESS;
+}
+
+
+kern_return_t self_server_handleSession(mach_port_t sport,
+ mach_port_t taskPort, uint32_t event, uint64_t ident)
+{
+ try {
+ if (taskPort != mach_task_self()) {
+ Syslog::error("handleSession: received from someone other than myself");
+ return KERN_SUCCESS;
+ }
+ if (event == AUE_SESSION_CLOSE)
+ Session::destroy(ident);
+ } catch(...) {
+ secdebug("SS", "exception handling a signal (ignored)");
+ }
+ mach_port_deallocate(mach_task_self(), taskPort);
+ return KERN_SUCCESS;
}
//
void Server::SleepWatcher::systemWillSleep()
{
- secdebug("SS", "sleep notification received");
+ SECURITYD_POWER_SLEEP();
Session::processSystemSleep();
+ for (set<PowerWatcher *>::const_iterator it = mPowerClients.begin(); it != mPowerClients.end(); it++)
+ (*it)->systemWillSleep();
+}
+
+void Server::SleepWatcher::systemIsWaking()
+{
+ SECURITYD_POWER_WAKE();
+ for (set<PowerWatcher *>::const_iterator it = mPowerClients.begin(); it != mPowerClients.end(); it++)
+ (*it)->systemIsWaking();
+}
+
+void Server::SleepWatcher::systemWillPowerOn()
+{
+ SECURITYD_POWER_ON();
+ Server::active().longTermActivity();
+ for (set<PowerWatcher *>::const_iterator it = mPowerClients.begin(); it != mPowerClients.end(); it++)
+ (*it)->systemWillPowerOn();
+}
+
+void Server::SleepWatcher::add(PowerWatcher *client)
+{
+ assert(mPowerClients.find(client) == mPowerClients.end());
+ mPowerClients.insert(client);
+}
+
+void Server::SleepWatcher::remove(PowerWatcher *client)
+{
+ assert(mPowerClients.find(client) != mPowerClients.end());
+ mPowerClients.erase(client);
}
//
-// Return the primary Cryptographic Service Provider.
-// This will be lazily loaded when it is first requested.
+// Expose the process/pid map to the outside
//
-CssmClient::CSP &Server::getCsp()
+Process *Server::findPid(pid_t pid) const
{
- if (!mCssm->isActive())
- loadCssm();
- return mCSP;
+ PidMap::const_iterator it = mPids.find(pid);
+ return (it == mPids.end()) ? NULL : it->second;
}
//
-// Initialize the CSSM/MDS subsystem.
-// This is thread-safe and can be done lazily.
+// Set delayed shutdown mode
+//
+void Server::waitForClients(bool waiting)
+{
+ mWaitForClients = waiting;
+}
+
+
+//
+// Begin shutdown processing.
+// We relinquish our primary state authority. From now on, we'll be
+// kept alive (only) by our current clients.
+//
+static FILE *reportFile;
+
+void Server::beginShutdown()
+{
+ StLock<Mutex> _(*this);
+ if (!mWaitForClients) {
+ SECURITYD_SHUTDOWN_NOW();
+ _exit(0);
+ } else {
+ if (!mShuttingDown) {
+ mShuttingDown = true;
+ Session::invalidateAuthHosts();
+ SECURITYD_SHUTDOWN_BEGIN();
+ if (verbosity() >= 2) {
+ reportFile = fopen("/var/log/securityd-shutdown.log", "w");
+ shutdownSnitch();
+ }
+ }
+ }
+}
+
+
//
-static void initMds();
+// During shutdown, we report residual clients to dtrace, and allow a state dump
+// for debugging.
+// We don't bother locking for the shuttingDown() check; it's a latching boolean
+// and we'll be good enough without a lock.
+//
+void Server::eventDone()
+{
+ if (this->shuttingDown()) {
+ StLock<Mutex> lazy(*this, false); // lazy lock acquisition
+ if (SECURITYD_SHUTDOWN_COUNT_ENABLED()) {
+ lazy.lock();
+ SECURITYD_SHUTDOWN_COUNT(mProcesses.size(), VProc::Transaction::debugCount());
+ }
+ if (verbosity() >= 2) {
+ lazy.lock();
+ shutdownSnitch();
+ }
+ IFDUMPING("shutdown", NodeCore::dumpAll());
+ }
+}
+
+
+void Server::shutdownSnitch()
+{
+ time_t now;
+ time(&now);
+ fprintf(reportFile, "%.24s %d residual clients:\n", ctime(&now), int(mPids.size()));
+ for (PidMap::const_iterator it = mPids.begin(); it != mPids.end(); ++it)
+ if (SecCodeRef clientCode = it->second->processCode()) {
+ CFRef<CFURLRef> path;
+ OSStatus rc = SecCodeCopyPath(clientCode, kSecCSDefaultFlags, &path.aref());
+ if (path)
+ fprintf(reportFile, " %s (%d)\n", cfString(path).c_str(), it->first);
+ else
+ fprintf(reportFile, "pid=%d (error %d)\n", it->first, int32_t(rc));
+ }
+ fprintf(reportFile, "\n");
+ fflush(reportFile);
+}
-void Server::loadCssm()
+
+//
+// Initialize the CSSM/MDS subsystem.
+// This was once done lazily on demand. These days, we are setting up the
+// system MDS here, and CSSM is pretty much always needed, so this is called
+// early during program startup. Do note that the server may not (yet) be running.
+//
+void Server::loadCssm(bool mdsIsInstalled)
{
if (!mCssm->isActive()) {
StLock<Mutex> _(*this);
+ VProc::Transaction xact;
if (!mCssm->isActive()) {
- try {
- initMds();
- } catch (const CssmError &error) {
- switch (error.osStatus()) {
- case CSSMERR_DL_MDS_ERROR:
- case CSSMERR_DL_OS_ACCESS_DENIED:
- secdebug("SS", "MDS initialization failed; continuing");
- Syslog::warning("MDS initialization failed; continuing");
- break;
- default:
- throw;
- }
- }
+ if (!mdsIsInstalled) { // non-system securityd instance should not reinitialize MDS
+ secdebug("SS", "Installing MDS");
+ IFDEBUG(if (geteuid() == 0))
+ MDSClient::mds().install();
+ }
secdebug("SS", "CSSM initializing");
mCssm->init();
mCSP->attach();
- IFDEBUG(char guids[Guid::stringRepLength+1]);
- secdebug("SS", "CSSM ready with CSP %s", mCSP->guid().toString(guids));
+ secdebug("SS", "CSSM ready with CSP %s", mCSP->guid().toString().c_str());
}
}
}
-#include <Security/mds.h>
-static void initMds()
+//
+// LongtermActivity/lock combo
+//
+LongtermStLock::LongtermStLock(Mutex &lck)
+ : StLock<Mutex>(lck, false) // don't take the lock yet
{
- secdebug("SS", "MDS initializing");
- CssmAllocatorMemoryFunctions memory(Allocator::standard());
- MDS_FUNCS functions;
- MDS_HANDLE handle;
- CssmError::check(MDS_Initialize(NULL, &memory, &functions, &handle));
- CssmError::check(MDS_Install(handle));
- CssmError::check(MDS_Terminate(handle));
+ if (lck.tryLock()) { // uncontested
+ this->mActive = true;
+ } else { // contested - need backup thread
+ Server::active().longTermActivity();
+ this->lock();
+ }
}
projects / apple / securityd.git / blobdiff