X-Git-Url: https://git.saurik.com/apple/security.git/blobdiff_plain/ce3c8656732c924baf7e88df75eab50891bdc471..fa7225c82381bac4432a6edf16f53b5370238d85:/OSX/libsecurity_codesigning/CodeSigningHelper/main.cpp?ds=sidebyside

diff --git a/OSX/libsecurity_codesigning/CodeSigningHelper/main.cpp b/OSX/libsecurity_codesigning/CodeSigningHelper/main.cpp
new file mode 100644
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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;
+}