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c5819701a3
At present this function does not accept a size for the FIT. This means that it must be read from the FIT itself, introducing potential security risk. Update the function to include a size parameter, which can be invalid, in which case fit_check_format() calculates it. For now no callers pass the size, but this can be updated later. Also adjust the return value to an error code so that all the different types of problems can be distinguished by the user. Signed-off-by: Simon Glass <sjg@chromium.org> Reported-by: Bruce Monroe <bruce.monroe@intel.com> Reported-by: Arie Haenel <arie.haenel@intel.com> Reported-by: Julien Lenoir <julien.lenoir@intel.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 ||
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fit_check_format(ptr, IMAGE_SIZE_INVAL))
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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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