From: Jan Luebbe <jlu@xxxxxxxxxxxxxx>
Signed-off-by: Jan Luebbe <jlu@xxxxxxxxxxxxxx>
Signed-off-by: Ulrich Ölmann <u.oelmann@xxxxxxxxxxxxxx>
---
images/Makefile | 3 +-
include/filetype.h | 2 +
scripts/.gitignore | 1 +
scripts/Makefile | 1 +
scripts/bareboxcrc.c | 219 +++++++++++++++++++++++++++++++++++++++++++++++++++
5 files changed, 225 insertions(+), 1 deletion(-)
create mode 100644 scripts/bareboxcrc.c
diff --git a/images/Makefile b/images/Makefile
index da9cc8d396ee..812074e624b0 100644
--- a/images/Makefile
+++ b/images/Makefile
@@ -71,7 +71,8 @@ quiet_cmd_pblx ?= PBLX $@
cmd_pblx ?= cat $(obj)/$(patsubst %.pblx,%.pblb,$(2)) > $@; \
$(call size_append, $(obj)/barebox.z) >> $@; \
cat $(obj)/barebox.z >> $@; \
- $(objtree)/scripts/fix_size -f $@
+ $(objtree)/scripts/fix_size -f $@; \
+ $(objtree)/scripts/bareboxcrc $@
$(obj)/%.pblx: $(obj)/%.pblb $(obj)/barebox.z FORCE
$(call if_changed,pblx,$(@F))
diff --git a/include/filetype.h b/include/filetype.h
index e87ca174a89d..ec0e01f64f9f 100644
--- a/include/filetype.h
+++ b/include/filetype.h
@@ -51,6 +51,8 @@ enum filetype is_fat_or_mbr(const unsigned char *sector, unsigned long *bootsec)
int is_fat_boot_sector(const void *_buf);
bool filetype_is_barebox_image(enum filetype ft);
+#define BAREBOX_CRC_MAGIC_VALUE "crc"
+
#define ARM_HEAD_SIZE 0x30
#define ARM_HEAD_MAGICWORD_OFFSET 0x20
#define ARM_HEAD_SIZE_OFFSET 0x2C
diff --git a/scripts/.gitignore b/scripts/.gitignore
index 533bffd97d36..d11ac7f97f32 100644
--- a/scripts/.gitignore
+++ b/scripts/.gitignore
@@ -2,6 +2,7 @@ bin2c
mkimage
fix_size
bareboxenv
+bareboxcrc
bareboxcrc32
kernel-install
bareboximd
diff --git a/scripts/Makefile b/scripts/Makefile
index a5c16b2f3133..1683d38c222d 100644
--- a/scripts/Makefile
+++ b/scripts/Makefile
@@ -8,6 +8,7 @@ hostprogs-y += bin2c
hostprogs-y += mkimage
hostprogs-y += fix_size
hostprogs-y += bareboxenv
+hostprogs-y += bareboxcrc
hostprogs-y += bareboxcrc32
hostprogs-y += kernel-install
hostprogs-$(CONFIG_IMD) += bareboximd
diff --git a/scripts/bareboxcrc.c b/scripts/bareboxcrc.c
new file mode 100644
index 000000000000..37cb9b0a6ce8
--- /dev/null
+++ b/scripts/bareboxcrc.c
@@ -0,0 +1,219 @@
+/*
+ * bareboxcrc.c
+ *
+ * Copyright (C) 2016 Jan Luebbe <j.luebbe@xxxxxxxxxxxxxx>
+ *
+ * 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 of the License, 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, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#define _DEFAULT_SOURCE
+
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <stdint.h>
+#include <limits.h>
+#include <errno.h>
+#include <stdbool.h>
+#include <stdlib.h>
+#include <string.h>
+#include <getopt.h>
+#include <endian.h>
+
+#include "compiler.h"
+
+#include "../include/filetype.h"
+#include "../crypto/crc32.c"
+
+#define EX_SUCCESS 0
+#define EX_NO_CHECKSUM 1
+#define EX_CHECKSUM_FAULTY 2
+#define EX_NO_BAREBOX_HEADER 3
+#define EX_IMAGE_TOO_SMALL 4
+#define EX_IMAGE_TOO_BIG 5
+#define EX_LOCATION_OCCUPIED 6
+#define EX_OUT_OF_MEMORY 7
+#define EX_IO_ERROR 8
+#define EX_WRONG_USAGE 9
+
+void usage(char *prgname)
+{
+ fprintf(stderr, "Usage : %s [OPTION] FILE\n"
+ "\n"
+ "options:\n"
+ " -c verify checksum\n"
+ " -f force\n",
+ prgname);
+}
+
+int get_barebox_head_size(const char *head)
+{
+ if (!strcmp(head + ARM_HEAD_MAGICWORD_OFFSET, "barebox"))
+ return ARM_HEAD_SIZE;
+ else if (!strcmp(head + MIPS_HEAD_MAGICWORD_OFFSET, "barebox"))
+ return MIPS_HEAD_SIZE;
+
+ return 0;
+}
+
+int checksum(FILE *image, bool check, bool force, off_t size)
+{
+ void *buf = malloc(size);
+ int ret = EX_SUCCESS;
+ size_t head_size;
+ uint32_t crc = 0;
+ uint32_t *p;
+
+ if (!buf) {
+ fprintf(stderr, "malloc: out of memory\n");
+ return EX_OUT_OF_MEMORY;
+ }
+
+ if (fseeko(image, 0, SEEK_SET) == -1) {
+ perror("fseeko");
+ ret = EX_IO_ERROR;
+ goto out;
+ }
+
+ if (fread(buf, 1, size, image) < size) {
+ perror("fread");
+ ret = EX_IO_ERROR;
+ goto out;
+ }
+
+ head_size = get_barebox_head_size(buf);
+ if (!head_size) {
+ fprintf(stderr, "image does not contain a barebox header\n");
+ ret = EX_NO_BAREBOX_HEADER;
+ goto out;
+ }
+
+ if (size < head_size + 2 * sizeof(uint32_t)) {
+ fprintf(stderr, "image is too small\n");
+ ret = EX_IMAGE_TOO_SMALL;
+ goto out;
+ }
+
+ p = buf + head_size;
+
+ if (check) {
+ if (strcmp((const char*) p, BAREBOX_CRC_MAGIC_VALUE)) {
+ fprintf(stderr, "image does not contain a checksum\n");
+ ret = EX_NO_CHECKSUM;
+ goto out;
+ }
+ } else {
+ if (!force && (*p != 0x55555555 || *(p+1) != 0x55555555)) {
+ fprintf(stderr, "location for magic value and CRC seems already "
+ "to be occupied by something else\n");
+ ret = EX_LOCATION_OCCUPIED;
+ goto out;
+ }
+
+ if (fseeko(image, head_size, SEEK_SET) == -1) {
+ perror("fseeko");
+ ret = EX_IO_ERROR;
+ goto out;
+ }
+
+ if (fwrite(BAREBOX_CRC_MAGIC_VALUE, sizeof(uint32_t), 1, image) != 1) {
+ perror("fwrite");
+ ret = EX_IO_ERROR;
+ goto out;
+ }
+
+ sprintf((char*) p, "%s", BAREBOX_CRC_MAGIC_VALUE);
+ }
+
+ crc = crc32(crc, buf, head_size + sizeof(uint32_t));
+ crc = crc32(crc, buf + head_size + 2 * sizeof(uint32_t),
+ size - (head_size + 2 * sizeof(uint32_t)));
+ crc = htobe32(crc);
+
+ if (check) {
+ if (crc != *(p + 1)) {
+ fprintf(stderr, "embedded checksum is faulty\n");
+ ret = EX_CHECKSUM_FAULTY;
+ }
+ } else {
+ if (fwrite(&crc, sizeof(uint32_t), 1, image) != 1) {
+ perror("fwrite");
+ ret = EX_IO_ERROR;
+ }
+ }
+
+out:
+ free(buf);
+ return ret;
+}
+
+int main(int argc, char *argv[])
+{
+ FILE *image;
+ bool check = false;
+ bool force = false;
+ int opt;
+ int ret;
+ off_t size;
+
+ while((opt = getopt(argc, argv, "cf")) != -1) {
+ switch (opt) {
+ case 'c':
+ check = true;
+ break;
+ case 'f':
+ force = true;
+ break;
+ }
+ }
+
+ if (optind >= argc) {
+ usage(argv[0]);
+ exit(EX_WRONG_USAGE);
+ }
+
+ image = fopen(argv[optind], check ? "r" : "r+");
+ if (image == NULL) {
+ perror("fopen");
+ exit(EX_IO_ERROR);
+ }
+
+ if (fseeko(image, 0, SEEK_END) == -1) {
+ perror("fseeko");
+ exit(EX_IO_ERROR);
+ }
+ size = ftello(image);
+ if (size == -1) {
+ perror("ftello");
+ exit(EX_IO_ERROR);
+ }
+ if (size > 0xa00000) {
+ fprintf(stderr, "error: image should be smaller than 10 MiB\n");
+ exit(EX_IMAGE_TOO_BIG);
+ }
+
+ ret = checksum(image, check, force, size);
+ if (ret)
+ exit(ret);
+
+ if (fclose(image) != 0) {
+ perror("fclose");
+ exit(EX_IO_ERROR);
+ }
+
+ exit(EX_SUCCESS);
+}
--
2.8.1
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