Security-57740.1.18.tar.gz

[apple/security.git] / OSX / libsecurity_codesigning / CodeSigningHelper / main.cpp

diff --git a/OSX/libsecurity_codesigning/CodeSigningHelper/main.cpp b/OSX/libsecurity_codesigning/CodeSigningHelper/main.cpp
new file mode 100644 (file)
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+++ b/OSX/libsecurity_codesigning/CodeSigningHelper/main.cpp
@@ -0,0 +1,108 @@
+/*
+ * 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 <Security/CodeSigning.h>
+#include <Security/SecCodePriv.h>
+#include <xpc/xpc.h>
+#include <sandbox.h>
+#include <security_utilities/cfutilities.h>
+#include <security_utilities/cfmunge.h>
+#include <security_utilities/logging.h>
+#include "codedirectory.h"
+
+
+
+static void
+request(xpc_connection_t peer, xpc_object_t event)
+{
+       OSStatus rc;
+       
+       pid_t pid = (pid_t)xpc_dictionary_get_int64(event, "pid");
+       if (pid <= 0)
+               return;
+       
+       xpc_object_t reply = xpc_dictionary_create_reply(event);
+       if (reply == NULL)
+               return;
+       
+       CFTemp<CFDictionaryRef> attributes("{%O=%d}", kSecGuestAttributePid, pid);
+       CFRef<SecCodeRef> code;
+       if ((rc = SecCodeCopyGuestWithAttributes(NULL, attributes, kSecCSDefaultFlags, &code.aref())) == noErr) {
+               
+               // path to base of client code
+               CFRef<CFURLRef> codePath;
+               if ((rc = SecCodeCopyPath(code, kSecCSDefaultFlags, &codePath.aref())) == noErr) {
+                       CFRef<CFDataRef> data = CFURLCreateData(NULL, codePath, kCFStringEncodingUTF8, true);
+                       xpc_dictionary_set_data(reply, "bundleURL", CFDataGetBytePtr(data), CFDataGetLength(data));
+               }
+               
+               // if the caller wants the Info.plist, get it and verify the hash passed by the caller
+               size_t iphLength;
+               if (const void *iphash = xpc_dictionary_get_data(event, "infohash", &iphLength)) {
+                       if (CFRef<CFDataRef> data = SecCodeCopyComponent(code, Security::CodeSigning::cdInfoSlot, CFTempData(iphash, iphLength))) {
+                               xpc_dictionary_set_data(reply, "infoPlist", CFDataGetBytePtr(data), CFDataGetLength(data));
+                       }
+               }
+       }
+       xpc_connection_send_message(peer, reply);
+       xpc_release(reply);
+}
+
+
+static void CodeSigningHelper_peer_event_handler(xpc_connection_t peer, xpc_object_t event)
+{
+       xpc_type_t type = xpc_get_type(event);
+       if (type == XPC_TYPE_ERROR)
+               return;
+       
+       assert(type == XPC_TYPE_DICTIONARY);
+       
+       const char *cmd = xpc_dictionary_get_string(event, "command");
+       if (cmd == NULL) {
+               xpc_connection_cancel(peer);
+       } else if (strcmp(cmd, "fetchData") == 0)
+               request(peer, event);
+       else {
+               Syslog::error("peer sent invalid command %s", cmd);
+               xpc_connection_cancel(peer);
+       }
+}
+
+
+static void CodeSigningHelper_event_handler(xpc_connection_t peer)
+{
+       xpc_connection_set_event_handler(peer, ^(xpc_object_t event) {
+               CodeSigningHelper_peer_event_handler(peer, event);
+       });
+       xpc_connection_resume(peer);
+}
+
+int main(int argc, const char *argv[])
+{
+       char *error = NULL;
+       if (sandbox_init("com.apple.CodeSigningHelper", SANDBOX_NAMED, &error)) {
+               Syslog::error("failed to enter sandbox: %s", error);
+               exit(EXIT_FAILURE);
+       }
+       xpc_main(CodeSigningHelper_event_handler);
+       return 0;
+}