[PATCH v2] tools: mkimage: Call verify_header after writing image to disk

Pali Rohár
2022-01-14T17:35:23Z

If image backend provides verify_header callback then call it after writing
image to disk. This ensures that written image is correct.

Signed-off-by: Pali Rohár <pali@kernel.org>
---
tools/mkimage.c | 41 +++++++++++++++++++++++++++++++++++++++++
1 file changed, 41 insertions(+)

diff --git a/tools/mkimage.c b/tools/mkimage.c
index fbe883ce3620..d5ad0925225c 100644
--- a/tools/mkimage.c
+++ b/tools/mkimage.c
@@ -336,6 +336,44 @@ static void process_args(int argc, char **argv)
usage("Missing output filename");
}

+static void verify_image(const struct image_type_params *tparams)
+{
+ struct stat sbuf;
+ void *ptr;
+ int ifd;
+
+ ifd = open(params.imagefile, O_RDONLY | O_BINARY);
+ if (ifd < 0) {
+ fprintf(stderr, "%s: Can't open %s: %s\n",
+ params.cmdname, params.imagefile,
+ strerror(errno));
+ exit(EXIT_FAILURE);
+ }
+
+ if (fstat(ifd, &sbuf) < 0) {
+ fprintf(stderr, "%s: Can't stat %s: %s\n",
+ params.cmdname, params.imagefile, strerror(errno));
+ exit(EXIT_FAILURE);
+ }
+ params.file_size = sbuf.st_size;
+
+ ptr = mmap(0, params.file_size, PROT_READ, MAP_SHARED, ifd, 0);
+ if (ptr == MAP_FAILED) {
+ fprintf(stderr, "%s: Can't map %s: %s\n",
+ params.cmdname, params.imagefile, strerror(errno));
+ exit(EXIT_FAILURE);
+ }
+
+ if (tparams->verify_header((unsigned char *)ptr, params.file_size, &params) != 0) {
+ fprintf(stderr, "%s: Failed to verify header of %s\n",
+ params.cmdname, params.imagefile);
+ exit(EXIT_FAILURE);
+ }
+
+ (void)munmap(ptr, params.file_size);
+ (void)close(ifd);
+}
+
int main(int argc, char **argv)
{
int ifd = -1;
@@ -698,6 +736,9 @@ int main(int argc, char **argv)
exit (EXIT_FAILURE);
}

+ if (tparams->verify_header)
+ verify_image(tparams);
+
exit (EXIT_SUCCESS);
}

--
2.20.1