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7d57485a8a
Add an option to open files in read-only mode in mmap_fdt so that fit_check_sign can be used to inspect files on read-only filesystems. For example, this is useful when a key is shipped in a read-only rootfs or squashfs. Signed-off-by: Luca Boccassi <luca.boccassi@microsoft.com>
113 lines
2.3 KiB
C
113 lines
2.3 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2014
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* DENX Software Engineering
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* Heiko Schocher <hs@denx.de>
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*
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* (C) Copyright 2008 Semihalf
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*
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* (C) Copyright 2000-2004
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* DENX Software Engineering
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* Wolfgang Denk, wd@denx.de
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*
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* Updated-by: Prafulla Wadaskar <prafulla@marvell.com>
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* FIT image specific code abstracted from mkimage.c
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* some functions added to address abstraction
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*
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* All rights reserved.
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*/
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#include "imagetool.h"
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#include "mkimage.h"
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#include "fit_common.h"
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#include <image.h>
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#include <u-boot/crc.h>
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int fit_verify_header(unsigned char *ptr, int image_size,
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struct image_tool_params *params)
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{
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if (fdt_check_header(ptr) != EXIT_SUCCESS || !fit_check_format(ptr))
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return EXIT_FAILURE;
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return EXIT_SUCCESS;
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}
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int fit_check_image_types(uint8_t type)
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{
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if (type == IH_TYPE_FLATDT)
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return EXIT_SUCCESS;
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else
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return EXIT_FAILURE;
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}
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int mmap_fdt(const char *cmdname, const char *fname, size_t size_inc,
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void **blobp, struct stat *sbuf, bool delete_on_error,
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bool read_only)
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{
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void *ptr;
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int fd;
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/* Load FIT blob into memory (we need to write hashes/signatures) */
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fd = open(fname, (read_only ? O_RDONLY : O_RDWR) | O_BINARY);
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if (fd < 0) {
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fprintf(stderr, "%s: Can't open %s: %s\n",
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cmdname, fname, strerror(errno));
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goto err;
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}
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if (fstat(fd, sbuf) < 0) {
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fprintf(stderr, "%s: Can't stat %s: %s\n",
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cmdname, fname, strerror(errno));
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goto err;
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}
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if (size_inc) {
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sbuf->st_size += size_inc;
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if (ftruncate(fd, sbuf->st_size)) {
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fprintf(stderr, "%s: Can't expand %s: %s\n",
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cmdname, fname, strerror(errno));
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goto err;
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}
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}
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errno = 0;
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ptr = mmap(0, sbuf->st_size,
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(read_only ? PROT_READ : PROT_READ | PROT_WRITE), MAP_SHARED,
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fd, 0);
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if ((ptr == MAP_FAILED) || (errno != 0)) {
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fprintf(stderr, "%s: Can't read %s: %s\n",
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cmdname, fname, strerror(errno));
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goto err;
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}
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/* check if ptr has a valid blob */
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if (fdt_check_header(ptr)) {
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fprintf(stderr, "%s: Invalid FIT blob\n", cmdname);
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goto err;
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}
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/* expand if needed */
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if (size_inc) {
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int ret;
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ret = fdt_open_into(ptr, ptr, sbuf->st_size);
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if (ret) {
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fprintf(stderr, "%s: Cannot expand FDT: %s\n",
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cmdname, fdt_strerror(ret));
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goto err;
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}
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}
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*blobp = ptr;
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return fd;
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err:
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if (fd >= 0)
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close(fd);
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if (delete_on_error)
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unlink(fname);
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return -1;
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}
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