code to check efi version

3 files changed, 249 insertions, 0 deletions

diff --git a/utils/fpswa/Makefile b/utils/fpswa/Makefile
new file mode 100644
index 000000000..ada7fd75b
--- /dev/null
+++ b/utils/fpswa/Makefile
@@ -0,0 +1,11 @@
+INC = /usr/include
+LIB_DIR = /usr/lib
+LIBS = $(LIB_DIR)/libbfd.a $(LIB_DIR)/libiberty.a
+
+all: fpswa_version
+
+fpswa_version:fpswa_version.c $(LIBS)
+	gcc -g -I$(INC) -o fpswa_version fpswa_version.c $(LIBS)
+
+clean:
+	rm -f fpswa_version
diff --git a/utils/fpswa/fpswa_version.c b/utils/fpswa/fpswa_version.c
new file mode 100644
index 000000000..6a41451dd
--- /dev/null
+++ b/utils/fpswa/fpswa_version.c
@@ -0,0 +1,228 @@
+/*
+  FPSWA Version
+    Parse the FPSWA.efi executable to find the version information.
+    The output may be used to compare multiple executables to determine
+    the newest version.
+
+  Copyright 2002 Intel Corporation
+  Copyright 2002 Jenna Hall <jenna.s.hall@intel.com>
+
+  This program is free software; you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation; either version 2, or (at your option)
+  any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program; if not, write to the Free Software
+  Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+*/
+
+#include <stdio.h>
+#include <string.h>
+#include <stddef.h>
+#include <bfd.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <malloc.h>
+
+#define SEARCH_STRING		"FileVersion"
+#define FILENAME_DESCRIPTOR	"InternalName"
+#define FILENAME		"fpswa.efi"
+#define MAX_VERSION_LENGTH	8
+
+/* Static declarations  */
+
+static off_t rsrc_offset = 0;	/* rc info offset - found in header */
+static size_t rsrc_size = 0;	/* rc info size - found in header */
+static int exit_status = 0;
+static char *default_target = NULL;	/* default at runtime */
+
+static void
+parse_section_header (bfd *, asection *, PTR);
+
+static void
+parse_bfd (bfd *);
+
+static void
+parse_file (char *, char *);
+
+static void
+extract_offset (char **);
+
+static void
+parse_unicode(ssize_t, unsigned short *);
+
+static void
+locate_file_version (char **);
+
+
+/* Definitions */
+
+static void
+parse_section_header (bfd *abfd, asection *section, PTR ignored ATTRIBUTE_UNUSED)
+{
+	unsigned int opb = bfd_octets_per_byte(abfd);
+
+	if (!strcmp(bfd_get_section_name(abfd, section), ".rsrc")) {
+		rsrc_offset = section->filepos;
+		rsrc_size = (bfd_section_size(abfd, section) / opb);
+	}
+}
+
+static void
+parse_bfd (bfd *abfd)
+{
+	char **matching;
+
+	if (bfd_check_format_matches (abfd, bfd_object, &matching)) {
+		bfd_map_over_sections (abfd, parse_section_header, (PTR) NULL);
+		return;
+	}
+	else {
+		fprintf(stderr, "Error: not an object file!\n");
+		return;
+	}
+}
+
+static void
+parse_file (char *filename, char *target)
+{
+	bfd *file;
+
+	file = bfd_openr (filename, target);
+	if (file == NULL) {
+		fprintf(stderr, "BFD library error!\n");
+		exit_status = 1;
+		return;
+	}
+
+	parse_bfd (file);
+
+	bfd_close (file);
+}
+
+/*
+ * Parse the executable to find the .rsrc header offset
+ */
+static void
+extract_offset (char **argv)
+{
+	char *target = default_target;
+
+	bfd_init ();
+
+	parse_file (argv[1], target);
+}
+
+/*
+ * Parse the unicode-encoded rc section of the FPSWA file to find the
+ * version string
+ */
+static void
+parse_unicode(ssize_t rc_section_size, unsigned short *buf)
+{
+	unsigned int i= 0;
+	char version_string[MAX_VERSION_LENGTH];
+	char *temp_ptr;
+	unsigned short *buffer_ptr = buf;
+
+	temp_ptr = SEARCH_STRING;
+
+	/* locate the version search string within the Unicode buffer */
+	while (buffer_ptr && (temp_ptr[0] != '\0')) {
+		if (*buffer_ptr == temp_ptr[0]) {
+			temp_ptr++;
+		}
+		else		// reset
+			temp_ptr = SEARCH_STRING;
+		buffer_ptr++;
+	}
+
+	/* parse past the Unicode NULL characters */
+	while (*buffer_ptr == 0) {
+		buffer_ptr++;
+	}
+
+	/* capture the version number string */
+	while (*buffer_ptr != '\0') {
+		version_string[i] = *buffer_ptr;
+		buffer_ptr++; i++;
+	}
+	/* NULL terminate the string */
+	version_string[i] = '\0';
+
+	/* output version string to user */
+	printf("%s\n", version_string);
+
+}
+
+/*
+ * Locate the rc info at that offset in the executable,
+ * then parse that section to locate the FileVersion string
+ */
+static void
+locate_file_version (char **argv)
+{
+	int fd;
+	ssize_t bytes_read = 0;
+	unsigned short *buf = malloc(rsrc_size);
+
+	if (buf == NULL) {
+		fprintf(stderr, "Malloc failed!  Exiting...\n");
+		free(buf);
+		exit(1);
+	}
+
+	if ((fd = open(argv[1], O_RDONLY)) < 0) {
+		fprintf(stderr, "Open failed:  %s\n", sys_errlist[errno]);
+		free(buf);
+		exit(1);
+	}
+
+	/* first search to the beginning of the rc info section */
+	if (lseek(fd, rsrc_offset, SEEK_SET) < 0) {
+		/* seek error; exit */
+		fprintf(stderr, "Seek failed:  %s\n", sys_errlist[errno]);
+		close(fd);
+		free(buf);
+		exit(1);
+	}
+
+	/* next load the rc info section into the buffer for parsing */
+	if ((bytes_read = read(fd, buf, rsrc_size)) < 0) {
+		/* read error; exit */
+		fprintf(stderr, "Read failed:  %s\n", sys_errlist[errno]);
+		close(fd);
+		free(buf);
+		exit(1);
+	}
+
+	/* now parse the rc info section for the FileVersion string */
+	parse_unicode(bytes_read, buf);
+
+	free(buf);
+	close(fd);
+}
+
+int
+main (int argc, char **argv)
+{
+	if (argc != 2) {
+		fprintf(stderr, "Usage: %s FPSWA.efi\n", argv[0]);
+		exit(1);
+	}
+
+	/* parse the executable to find the .rsrc header offset */
+	extract_offset(argv);
+
+	/* locate the rc info at that offset in the executable,
+	   then parse that section to locate the FileVersion string */
+	locate_file_version(argv);
+
+	return exit_status;
+}
diff --git a/utils/fpswa/readme b/utils/fpswa/readme
new file mode 100644
index 000000000..628b6220a
--- /dev/null
+++ b/utils/fpswa/readme
@@ -0,0 +1,10 @@
+*******************************

+FPSWA.efi version check utility

+*******************************

+

+Usage:  fpswa_version FPSWA.efi

+

+

+This utility will extract the version number from an FPSWA.efi binary file.

+The output may then be compared with the output from other FPSWA.efi binaries

+to determine which is the newest on the system, for OS installation purposes.