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Diffstat (limited to 'tools/image-host.c')
| -rw-r--r-- | tools/image-host.c | 201 |
1 files changed, 201 insertions, 0 deletions
diff --git a/tools/image-host.c b/tools/image-host.c new file mode 100644 index 0000000..82b6cee --- /dev/null +++ b/tools/image-host.c @@ -0,0 +1,201 @@ +/* + * Copyright (c) 2013, Google Inc. + * + * (C) Copyright 2008 Semihalf + * + * (C) Copyright 2000-2006 + * Wolfgang Denk, DENX Software Engineering, wd@denx.de. + * + * See file CREDITS for list of people who contributed to this + * project. + * + * 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., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#include "mkimage.h" +#include <bootstage.h> +#include <image.h> +#include <sha1.h> +#include <time.h> +#include <u-boot/crc.h> +#include <u-boot/md5.h> + +/** + * fit_set_hashes - process FIT component image nodes and calculate hashes + * @fit: pointer to the FIT format image header + * + * fit_set_hashes() adds hash values for all component images in the FIT blob. + * Hashes are calculated for all component images which have hash subnodes + * with algorithm property set to one of the supported hash algorithms. + * + * returns + * 0, on success + * libfdt error code, on failure + */ +int fit_set_hashes(void *fit) +{ + int images_noffset; + int noffset; + int ndepth; + int ret; + + /* Find images parent node offset */ + images_noffset = fdt_path_offset(fit, FIT_IMAGES_PATH); + if (images_noffset < 0) { + printf("Can't find images parent node '%s' (%s)\n", + FIT_IMAGES_PATH, fdt_strerror(images_noffset)); + return images_noffset; + } + + /* Process its subnodes, print out component images details */ + for (ndepth = 0, noffset = fdt_next_node(fit, images_noffset, &ndepth); + (noffset >= 0) && (ndepth > 0); + noffset = fdt_next_node(fit, noffset, &ndepth)) { + if (ndepth == 1) { + /* + * Direct child node of the images parent node, + * i.e. component image node. + */ + ret = fit_image_set_hashes(fit, noffset); + if (ret) + return ret; + } + } + + return 0; +} + +/** + * fit_image_set_hashes - calculate/set hashes for given component image node + * @fit: pointer to the FIT format image header + * @image_noffset: requested component image node + * + * fit_image_set_hashes() adds hash values for an component image node. All + * existing hash subnodes are checked, if algorithm property is set to one of + * the supported hash algorithms, hash value is computed and corresponding + * hash node property is set, for example: + * + * Input component image node structure: + * + * o image@1 (at image_noffset) + * | - data = [binary data] + * o hash@1 + * |- algo = "sha1" + * + * Output component image node structure: + * + * o image@1 (at image_noffset) + * | - data = [binary data] + * o hash@1 + * |- algo = "sha1" + * |- value = sha1(data) + * + * returns: + * 0 on sucess + * <0 on failure + */ +int fit_image_set_hashes(void *fit, int image_noffset) +{ + const void *data; + size_t size; + char *algo; + uint8_t value[FIT_MAX_HASH_LEN]; + int value_len; + int noffset; + int ndepth; + + /* Get image data and data length */ + if (fit_image_get_data(fit, image_noffset, &data, &size)) { + printf("Can't get image data/size\n"); + return -1; + } + + /* Process all hash subnodes of the component image node */ + for (ndepth = 0, noffset = fdt_next_node(fit, image_noffset, &ndepth); + (noffset >= 0) && (ndepth > 0); + noffset = fdt_next_node(fit, noffset, &ndepth)) { + if (ndepth == 1) { + /* Direct child node of the component image node */ + + /* + * Check subnode name, must be equal to "hash". + * Multiple hash nodes require unique unit node + * names, e.g. hash@1, hash@2, etc. + */ + if (strncmp(fit_get_name(fit, noffset, NULL), + FIT_HASH_NODENAME, + strlen(FIT_HASH_NODENAME)) != 0) { + /* Not a hash subnode, skip it */ + continue; + } + + if (fit_image_hash_get_algo(fit, noffset, &algo)) { + printf("Can't get hash algo property for '%s' hash node in '%s' image node\n", + fit_get_name(fit, noffset, NULL), + fit_get_name(fit, image_noffset, NULL)); + return -1; + } + + if (calculate_hash(data, size, algo, value, + &value_len)) { + printf("Unsupported hash algorithm (%s) for '%s' hash node in '%s' image node\n", + algo, fit_get_name(fit, noffset, NULL), + fit_get_name(fit, image_noffset, NULL)); + return -1; + } + + if (fit_image_hash_set_value(fit, noffset, value, + value_len)) { + printf("Can't set hash value for '%s' hash node in '%s' image node\n", + fit_get_name(fit, noffset, NULL), + fit_get_name(fit, image_noffset, NULL)); + return -1; + } + } + } + + return 0; +} + +/** + * fit_image_hash_set_value - set hash value in requested has node + * @fit: pointer to the FIT format image header + * @noffset: hash node offset + * @value: hash value to be set + * @value_len: hash value length + * + * fit_image_hash_set_value() attempts to set hash value in a node at offset + * given and returns operation status to the caller. + * + * returns + * 0, on success + * -1, on failure + */ +int fit_image_hash_set_value(void *fit, int noffset, uint8_t *value, + int value_len) +{ + int ret; + + ret = fdt_setprop(fit, noffset, FIT_VALUE_PROP, value, value_len); + if (ret) { + printf("Can't set hash '%s' property for '%s' node(%s)\n", + FIT_VALUE_PROP, fit_get_name(fit, noffset, NULL), + fdt_strerror(ret)); + return -1; + } + + return 0; +} |