build and verify on disk file integrity of pluto and charon executables

src/charon/daemon.c

@@ -672,6 +672,15 @@ int main(int argc, char *argv[])
 	{
 		exit(-1);
 	}
+	
+	if (lib->integrity &&
+		!lib->integrity->check_file(lib->integrity, "charon", argv[0]))
+	{
+		dbg_stderr(1, "integrity check of charon failed");
+		library_deinit();
+		exit(-1);
+	}
+	
 	lib->printf_hook->add_handler(lib->printf_hook, 'R',
 								  traffic_selector_printf_hook,
 								  PRINTF_HOOK_ARGTYPE_POINTER,

src/checksum/Makefile.am

@@ -11,7 +11,10 @@ CLEANFILES = checksum.c checksum_builder
 INCLUDES = -I$(top_srcdir)/src/libstrongswan
 AM_CFLAGS = -rdynamic
 
-libs = $(shell find $(top_builddir)/src -name 'libstrongswan*.so')
+libs =	$(shell find $(top_builddir)/src/libstrongswan $(top_builddir)/src/charon \
+			-name 'libstrongswan*.so') \
+		$(top_builddir)/src/charon/.libs/charon \
+		$(top_builddir)/src/pluto/.libs/pluto
 
 checksum.c : checksum_builder $(libs)
 		./checksum_builder $(libs) > checksum.c

src/checksum/checksum_builder.c

@@ -46,7 +46,7 @@ int main(int argc, char* argv[])
 	printf("integrity_checksum_t checksums[] = {\n");
 	for (i = 1; i < argc; i++)
 	{
-		char *name, *path, *sname;
+		char *name, *path, *sname = NULL;
 		void *handle, *symbol;
 		u_int32_t fsum, ssum;
 		
@@ -65,6 +65,14 @@ int main(int argc, char* argv[])
 			name = strdup("libstrongswan\",");
 			sname = "library_init";
 		}
+		else if (strstr(path, "charon"))
+		{
+			name = strdup("charon\",");
+		}
+		else if (strstr(path, "pluto"))
+		{
+			name = strdup("pluto\",");
+		}
 		else
 		{
 			fprintf(stderr, "don't know how to handle '%s', ignored", path);
@@ -73,25 +81,27 @@ int main(int argc, char* argv[])
 		
 		fsum = integrity->build_file(integrity, path);
 		ssum = 0;
-		handle = dlopen(path, RTLD_LAZY);
-		if (handle)
+		if (sname)
 		{
-			symbol = dlsym(handle, sname);
-			if (symbol)
+			handle = dlopen(path, RTLD_LAZY);
+			if (handle)
 			{
-				ssum = integrity->build_segment(integrity, symbol);
+				symbol = dlsym(handle, sname);
+				if (symbol)
+				{
+					ssum = integrity->build_segment(integrity, symbol);
+				}
+				else
+				{
+					fprintf(stderr, "symbol lookup failed: %s\n", dlerror());
+				}
+				dlclose(handle);
 			}
 			else
 			{
-				fprintf(stderr, "symbol lookup failed: %s\n", dlerror());
+				fprintf(stderr, "dlopen failed: %s\n", dlerror());
 			}
-			dlclose(handle);
 		}
-		else
-		{
-			fprintf(stderr, "dlopen failed: %s\n", dlerror());
-		}
-		
 		printf("\t{\"%-20s0x%08x, 0x%08x},\n", name, fsum, ssum);
 		free(name);
 	}

src/pluto/plutomain.c

@@ -264,6 +264,13 @@ int main(int argc, char **argv)
 	{
 		abort();
 	}
+	if (lib->integrity &&
+		!lib->integrity->check_file(lib->integrity, "pluto", argv[0]))
+	{
+		fprintf(stderr, "integrity check of pluto failed\n");
+		library_deinit();
+		abort();
+	}
 	options = options_create();
 
 	/* handle arguments */