Security-57740.1.18.tar.gz

[apple/security.git] / OSX / libsecurity_translocate / lib / SecTranslocateXPCServer.cpp

diff --git a/OSX/libsecurity_translocate/lib/SecTranslocateXPCServer.cpp b/OSX/libsecurity_translocate/lib/SecTranslocateXPCServer.cpp
new file mode 100644 (file)
index 0000000..769f72a
--- /dev/null
+++ b/OSX/libsecurity_translocate/lib/SecTranslocateXPCServer.cpp
@@ -0,0 +1,155 @@
+/*
+ * Copyright (c) 2016 Apple Inc. All Rights Reserved.
+ *
+ * @APPLE_LICENSE_HEADER_START@
+ *
+ * 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
+ * compliance with the License. Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this
+ * file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ *
+ * @APPLE_LICENSE_HEADER_END@
+ */
+
+#include <string>
+#include <vector>
+
+#include <dispatch/dispatch.h>
+#include <xpc/xpc.h>
+
+#include <security_utilities/unix++.h>
+#include <security_utilities/logging.h>
+
+#include "SecTranslocateInterface.hpp"
+#include "SecTranslocateXPCServer.hpp"
+#include "SecTranslocateUtilities.hpp"
+#include "SecTranslocateShared.hpp"
+
+namespace Security {
+namespace SecTranslocate {
+
+static void doCreate(xpc_object_t msg, xpc_object_t reply)
+{
+    const char* original = xpc_dictionary_get_string(msg, kSecTranslocateXPCMessageOriginalPath);
+    const char* dest = xpc_dictionary_get_string(msg, kSecTranslocateXPCMessageDestinationPath);
+
+    string originalPath = original ? original : "";
+    string destPath = dest ? dest: "";
+
+    if( originalPath.empty())
+    {
+        Syslog::error("SecTranslocate: XPCServer, doCreate no path to translocate");
+        UnixError::throwMe(EINVAL);
+    }
+
+    TranslocationPath tPath(originalPath);
+
+    string result = tPath.getOriginalRealPath();
+
+    if(tPath.shouldTranslocate())
+    {
+        result = Security::SecTranslocate::translocatePathForUser(tPath, destPath);
+    }
+    xpc_dictionary_set_string(reply, kSecTranslocateXPCReplySecurePath, result.c_str());
+}
+
+static void doCheckIn(xpc_object_t msg)
+{
+    if (xpc_dictionary_get_value(msg, kSecTranslocateXPCMessagePid) == NULL)
+    {
+        Syslog::error("SecTranslocate, XpcServer, doCheckin, no pid provided");
+        UnixError::throwMe(EINVAL);
+    }
+    int64_t pid = xpc_dictionary_get_int64(msg, kSecTranslocateXPCMessagePid);
+    Translocator * t = getTranslocator();
+    if(t)
+    {
+        t->appLaunchCheckin((pid_t)pid);
+    }
+    else
+    {
+        Syslog::critical("SecTranslocate, XpcServer, doCheckin, No top level translocator");
+        UnixError::throwMe(EINVAL);
+    }
+}
+
+XPCServer::XPCServer(dispatch_queue_t q):notificationQ(q)
+{
+    if(q == NULL)
+    {
+        Syslog::critical("SecTranslocate: XPCServer, no dispatch queue provided");
+        UnixError::throwMe(EINVAL);
+    }
+    //notificationQ is assumed to be serial
+    service = xpc_connection_create_mach_service(SECTRANSLOCATE_XPC_SERVICE_NAME,
+                                                 notificationQ,
+                                                 XPC_CONNECTION_MACH_SERVICE_LISTENER);
+    if (service == NULL)
+    {
+        Syslog::critical("SecTranslocate: XPCServer, failed to create xpc mach service");
+        UnixError::throwMe(ENOMEM);
+    }
+
+    dispatch_retain(notificationQ);
+    xpc_connection_set_event_handler(service, ^(xpc_object_t cmsg) {
+        if (xpc_get_type(cmsg) == XPC_TYPE_CONNECTION) {
+            xpc_connection_t connection = xpc_connection_t(cmsg);
+            Syslog::debug("SecTranslocate: XPCServer, Connection from pid %d", xpc_connection_get_pid(connection));
+            xpc_connection_set_event_handler(connection, ^(xpc_object_t msg) {
+                if (xpc_get_type(msg) == XPC_TYPE_DICTIONARY) {
+                    xpc_retain(msg);
+                    dispatch_async(notificationQ, ^{   // async from here
+                        const char *function = xpc_dictionary_get_string(msg, kSecTranslocateXPCMessageFunction);
+                        Syslog::debug("SecTranslocate: XPCServer, pid %d requested %s", xpc_connection_get_pid(connection), function);
+                        xpc_object_t reply = xpc_dictionary_create_reply(msg);
+                        try {
+                            if (function == NULL) {
+                                xpc_dictionary_set_int64(reply, kSecTranslocateXPCReplyError, EINVAL);
+                            } else if (!strcmp(function, kSecTranslocateXPCFuncCreate)) {
+                                doCreate(msg, reply);
+                            } else if (!strcmp(function, kSecTranslocateXPCFuncCheckIn)) {
+                                doCheckIn(msg);
+                            } else {
+                                xpc_dictionary_set_int64(reply, kSecTranslocateXPCReplyError, EINVAL);
+                            }
+                        } catch (Security::UnixError err) {
+                            xpc_dictionary_set_int64(reply, kSecTranslocateXPCReplyError, err.unixError());
+                        } catch (...) {
+                            xpc_dictionary_set_int64(reply, kSecTranslocateXPCReplyError, EINVAL);
+                        }
+                        xpc_release(msg);
+                        if (reply) {
+                            xpc_connection_send_message(connection, reply);
+                            xpc_release(reply);
+                        }
+                    });
+                }
+            });
+            xpc_connection_resume(connection);
+        } else {
+            const char *s = xpc_copy_description(cmsg);
+            Syslog::error("SecTranslocate: XPCServer, unepxected incoming message - %s", s);
+            free((char*)s);
+        }
+    });
+    xpc_connection_resume(service);
+}
+
+XPCServer::~XPCServer()
+{
+    xpc_connection_cancel(service);
+    dispatch_release(notificationQ);
+}
+
+} //namespace Security
+} //namespace SecTranslocate