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+/*
+ * 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_hash_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_set_hash_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
+ */
+static int fit_set_hash_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;
+}
+
+/**
+ * fit_image_process_hash - Process a single subnode of the images/ node
+ *
+ * Check each subnode and process accordingly. For hash nodes we generate
+ * a hash of the supplised data and store it in the node.
+ *
+ * @fit: pointer to the FIT format image header
+ * @image_name: name of image being processes (used to display errors)
+ * @noffset: subnode offset
+ * @data: data to process
+ * @size: size of data in bytes
+ * @return 0 if ok, -1 on error
+ */
+static int fit_image_process_hash(void *fit, const char *image_name,
+ int noffset, const void *data, size_t size)
+{
+ uint8_t value[FIT_MAX_HASH_LEN];
+ const char *node_name;
+ int value_len;
+ char *algo;
+
+ node_name = fit_get_name(fit, noffset, NULL);
+
+ 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",
+ node_name, image_name);
+ 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, node_name, image_name);
+ return -1;
+ }
+
+ if (fit_set_hash_value(fit, noffset, value, value_len)) {
+ printf("Can't set hash value for '%s' hash node in '%s' image node\n",
+ node_name, image_name);
+ return -1;
+ }
+
+ return 0;
+}
+
+/**
+ * fit_image_add_verification_data() - calculate/set hash data for image node
+ *
+ * This adds hash values for a 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)
+ *
+ * For signature details, please see doc/uImage.FIT/signature.txt
+ *
+ * @fit: Pointer to the FIT format image header
+ * @image_noffset: Requested component image node
+ * @return: 0 on success, <0 on failure
+ */
+int fit_image_add_verification_data(void *fit, int image_noffset)
+{
+ const char *image_name;
+ const void *data;
+ size_t size;
+ int noffset;
+
+ /* 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;
+ }
+
+ image_name = fit_get_name(fit, image_noffset, NULL);
+
+ /* Process all hash subnodes of the component image node */
+ for (noffset = fdt_first_subnode(fit, image_noffset);
+ noffset >= 0;
+ noffset = fdt_next_subnode(fit, noffset)) {
+ const char *node_name;
+ int ret = 0;
+
+ /*
+ * Check subnode name, must be equal to "hash" or "signature".
+ * Multiple hash nodes require unique unit node
+ * names, e.g. hash@1, hash@2, signature@1, etc.
+ */
+ node_name = fit_get_name(fit, noffset, NULL);
+ if (!strncmp(node_name, FIT_HASH_NODENAME,
+ strlen(FIT_HASH_NODENAME))) {
+ ret = fit_image_process_hash(fit, image_name, noffset,
+ data, size);
+ }
+ if (ret)
+ return -1;
+ }
+
+ return 0;
+}
+
+int fit_add_verification_data(void *fit)
+{
+ int images_noffset;
+ int noffset;
+ 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 (noffset = fdt_first_subnode(fit, images_noffset);
+ noffset >= 0;
+ noffset = fdt_next_subnode(fit, noffset)) {
+ /*
+ * Direct child node of the images parent node,
+ * i.e. component image node.
+ */
+ ret = fit_image_add_verification_data(fit, noffset);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}