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- // SPDX-License-Identifier: GPL-2.0+
- /*
- * Copyright (c) 2013, Google Inc.
- *
- * (C) Copyright 2008 Semihalf
- *
- * (C) Copyright 2000-2006
- * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
- */
- #include "mkimage.h"
- #include <bootm.h>
- #include <fdt_region.h>
- #include <image.h>
- #include <version.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 ret == -FDT_ERR_NOSPACE ? -ENOSPC : -EIO;
- }
- 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;
- int ret;
- 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 -ENOENT;
- }
- 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 -EPROTONOSUPPORT;
- }
- ret = fit_set_hash_value(fit, noffset, value, value_len);
- if (ret) {
- printf("Can't set hash value for '%s' hash node in '%s' image node\n",
- node_name, image_name);
- return ret;
- }
- return 0;
- }
- /**
- * fit_image_write_sig() - write the signature to a FIT
- *
- * This writes the signature and signer data to the FIT.
- *
- * @fit: pointer to the FIT format image header
- * @noffset: hash node offset
- * @value: signature value to be set
- * @value_len: signature value length
- * @comment: Text comment to write (NULL for none)
- *
- * returns
- * 0, on success
- * -FDT_ERR_..., on failure
- */
- static int fit_image_write_sig(void *fit, int noffset, uint8_t *value,
- int value_len, const char *comment, const char *region_prop,
- int region_proplen, const char *cmdname)
- {
- int string_size;
- int ret;
- /*
- * Get the current string size, before we update the FIT and add
- * more
- */
- string_size = fdt_size_dt_strings(fit);
- ret = fdt_setprop(fit, noffset, FIT_VALUE_PROP, value, value_len);
- if (!ret) {
- ret = fdt_setprop_string(fit, noffset, "signer-name",
- "mkimage");
- }
- if (!ret) {
- ret = fdt_setprop_string(fit, noffset, "signer-version",
- PLAIN_VERSION);
- }
- if (comment && !ret)
- ret = fdt_setprop_string(fit, noffset, "comment", comment);
- if (!ret) {
- time_t timestamp = imagetool_get_source_date(cmdname,
- time(NULL));
- ret = fit_set_timestamp(fit, noffset, timestamp);
- }
- if (region_prop && !ret) {
- uint32_t strdata[2];
- ret = fdt_setprop(fit, noffset, "hashed-nodes",
- region_prop, region_proplen);
- /* This is a legacy offset, it is unused, and must remain 0. */
- strdata[0] = 0;
- strdata[1] = cpu_to_fdt32(string_size);
- if (!ret) {
- ret = fdt_setprop(fit, noffset, "hashed-strings",
- strdata, sizeof(strdata));
- }
- }
- return ret;
- }
- static int fit_image_setup_sig(struct image_sign_info *info,
- const char *keydir, void *fit, const char *image_name,
- int noffset, const char *require_keys, const char *engine_id)
- {
- const char *node_name;
- char *algo_name;
- const char *padding_name;
- node_name = fit_get_name(fit, noffset, NULL);
- if (fit_image_hash_get_algo(fit, noffset, &algo_name)) {
- printf("Can't get algo property for '%s' signature node in '%s' image node\n",
- node_name, image_name);
- return -1;
- }
- padding_name = fdt_getprop(fit, noffset, "padding", NULL);
- memset(info, '\0', sizeof(*info));
- info->keydir = keydir;
- info->keyname = fdt_getprop(fit, noffset, FIT_KEY_HINT, NULL);
- info->fit = fit;
- info->node_offset = noffset;
- info->name = strdup(algo_name);
- info->checksum = image_get_checksum_algo(algo_name);
- info->crypto = image_get_crypto_algo(algo_name);
- info->padding = image_get_padding_algo(padding_name);
- info->require_keys = require_keys;
- info->engine_id = engine_id;
- if (!info->checksum || !info->crypto) {
- printf("Unsupported signature algorithm (%s) for '%s' signature node in '%s' image node\n",
- algo_name, node_name, image_name);
- return -1;
- }
- return 0;
- }
- /**
- * fit_image_process_sig- Process a single subnode of the images/ node
- *
- * Check each subnode and process accordingly. For signature nodes we
- * generate a signed hash of the supplised data and store it in the node.
- *
- * @keydir: Directory containing keys to use for signing
- * @keydest: Destination FDT blob to write public keys into
- * @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
- * @comment: Comment to add to signature nodes
- * @require_keys: Mark all keys as 'required'
- * @engine_id: Engine to use for signing
- * @return 0 if ok, -1 on error
- */
- static int fit_image_process_sig(const char *keydir, void *keydest,
- void *fit, const char *image_name,
- int noffset, const void *data, size_t size,
- const char *comment, int require_keys, const char *engine_id,
- const char *cmdname)
- {
- struct image_sign_info info;
- struct image_region region;
- const char *node_name;
- uint8_t *value;
- uint value_len;
- int ret;
- if (fit_image_setup_sig(&info, keydir, fit, image_name, noffset,
- require_keys ? "image" : NULL, engine_id))
- return -1;
- node_name = fit_get_name(fit, noffset, NULL);
- region.data = data;
- region.size = size;
- ret = info.crypto->sign(&info, ®ion, 1, &value, &value_len);
- if (ret) {
- printf("Failed to sign '%s' signature node in '%s' image node: %d\n",
- node_name, image_name, ret);
- /* We allow keys to be missing */
- if (ret == -ENOENT)
- return 0;
- return -1;
- }
- ret = fit_image_write_sig(fit, noffset, value, value_len, comment,
- NULL, 0, cmdname);
- if (ret) {
- if (ret == -FDT_ERR_NOSPACE)
- return -ENOSPC;
- printf("Can't write signature for '%s' signature node in '%s' conf node: %s\n",
- node_name, image_name, fdt_strerror(ret));
- return -1;
- }
- free(value);
- /* Get keyname again, as FDT has changed and invalidated our pointer */
- info.keyname = fdt_getprop(fit, noffset, FIT_KEY_HINT, NULL);
- /*
- * Write the public key into the supplied FDT file; this might fail
- * several times, since we try signing with successively increasing
- * size values
- */
- if (keydest) {
- ret = info.crypto->add_verify_data(&info, keydest);
- if (ret) {
- printf("Failed to add verification data for '%s' signature node in '%s' image node\n",
- node_name, image_name);
- return ret;
- }
- }
- return 0;
- }
- static int fit_image_read_data(char *filename, unsigned char *data,
- int expected_size)
- {
- struct stat sbuf;
- int fd, ret = -1;
- ssize_t n;
- /* Open file */
- fd = open(filename, O_RDONLY | O_BINARY);
- if (fd < 0) {
- printf("Can't open file %s (err=%d => %s)\n",
- filename, errno, strerror(errno));
- return -1;
- }
- /* Compute file size */
- if (fstat(fd, &sbuf) < 0) {
- printf("Can't fstat file %s (err=%d => %s)\n",
- filename, errno, strerror(errno));
- goto err;
- }
- /* Check file size */
- if (sbuf.st_size != expected_size) {
- printf("File %s don't have the expected size (size=%ld, expected=%d)\n",
- filename, sbuf.st_size, expected_size);
- goto err;
- }
- /* Read data */
- n = read(fd, data, sbuf.st_size);
- if (n < 0) {
- printf("Can't read file %s (err=%d => %s)\n",
- filename, errno, strerror(errno));
- goto err;
- }
- /* Check that we have read all the file */
- if (n != sbuf.st_size) {
- printf("Can't read all file %s (read %zd bytes, expexted %ld)\n",
- filename, n, sbuf.st_size);
- goto err;
- }
- ret = 0;
- err:
- close(fd);
- return ret;
- }
- static int fit_image_setup_cipher(struct image_cipher_info *info,
- const char *keydir, void *fit,
- const char *image_name, int image_noffset,
- int noffset)
- {
- char *algo_name;
- char filename[128];
- int ret = -1;
- if (fit_image_cipher_get_algo(fit, noffset, &algo_name)) {
- printf("Can't get algo name for cipher in image '%s'\n",
- image_name);
- goto out;
- }
- info->keydir = keydir;
- /* Read the key name */
- info->keyname = fdt_getprop(fit, noffset, FIT_KEY_HINT, NULL);
- if (!info->keyname) {
- printf("Can't get key name for cipher in image '%s'\n",
- image_name);
- goto out;
- }
- /* Read the IV name */
- info->ivname = fdt_getprop(fit, noffset, "iv-name-hint", NULL);
- if (!info->ivname) {
- printf("Can't get iv name for cipher in image '%s'\n",
- image_name);
- goto out;
- }
- info->fit = fit;
- info->node_noffset = noffset;
- info->name = algo_name;
- info->cipher = image_get_cipher_algo(algo_name);
- if (!info->cipher) {
- printf("Can't get algo for cipher '%s'\n", image_name);
- goto out;
- }
- /* Read the key in the file */
- snprintf(filename, sizeof(filename), "%s/%s%s",
- info->keydir, info->keyname, ".bin");
- info->key = malloc(info->cipher->key_len);
- if (!info->key) {
- printf("Can't allocate memory for key\n");
- ret = -1;
- goto out;
- }
- ret = fit_image_read_data(filename, (unsigned char *)info->key,
- info->cipher->key_len);
- if (ret < 0)
- goto out;
- /* Read the IV in the file */
- snprintf(filename, sizeof(filename), "%s/%s%s",
- info->keydir, info->ivname, ".bin");
- info->iv = malloc(info->cipher->iv_len);
- if (!info->iv) {
- printf("Can't allocate memory for iv\n");
- ret = -1;
- goto out;
- }
- ret = fit_image_read_data(filename, (unsigned char *)info->iv,
- info->cipher->iv_len);
- out:
- return ret;
- }
- int fit_image_write_cipher(void *fit, int image_noffset, int noffset,
- const void *data, size_t size,
- unsigned char *data_ciphered, int data_ciphered_len)
- {
- int ret = -1;
- /* Replace data with ciphered data */
- ret = fdt_setprop(fit, image_noffset, FIT_DATA_PROP,
- data_ciphered, data_ciphered_len);
- if (ret == -FDT_ERR_NOSPACE) {
- ret = -ENOSPC;
- goto out;
- }
- if (ret) {
- printf("Can't replace data with ciphered data (err = %d)\n", ret);
- goto out;
- }
- /* add non ciphered data size */
- ret = fdt_setprop_u32(fit, image_noffset, "data-size-unciphered", size);
- if (ret == -FDT_ERR_NOSPACE) {
- ret = -ENOSPC;
- goto out;
- }
- if (ret) {
- printf("Can't add unciphered data size (err = %d)\n", ret);
- goto out;
- }
- out:
- return ret;
- }
- static int
- fit_image_process_cipher(const char *keydir, void *keydest, void *fit,
- const char *image_name, int image_noffset,
- int node_noffset, const void *data, size_t size,
- const char *cmdname)
- {
- struct image_cipher_info info;
- unsigned char *data_ciphered = NULL;
- int data_ciphered_len;
- int ret;
- memset(&info, 0, sizeof(info));
- ret = fit_image_setup_cipher(&info, keydir, fit, image_name,
- image_noffset, node_noffset);
- if (ret)
- goto out;
- ret = info.cipher->encrypt(&info, data, size,
- &data_ciphered, &data_ciphered_len);
- if (ret)
- goto out;
- /*
- * Write the public key into the supplied FDT file; this might fail
- * several times, since we try signing with successively increasing
- * size values
- */
- if (keydest) {
- ret = info.cipher->add_cipher_data(&info, keydest);
- if (ret) {
- printf("Failed to add verification data for cipher '%s' in image '%s'\n",
- info.keyname, image_name);
- goto out;
- }
- }
- ret = fit_image_write_cipher(fit, image_noffset, node_noffset,
- data, size,
- data_ciphered, data_ciphered_len);
- out:
- free(data_ciphered);
- free((void *)info.key);
- free((void *)info.iv);
- return ret;
- }
- int fit_image_cipher_data(const char *keydir, void *keydest,
- void *fit, int image_noffset, const char *comment,
- int require_keys, const char *engine_id,
- const char *cmdname)
- {
- const char *image_name;
- const void *data;
- size_t size;
- int cipher_node_offset, len;
- /* Get image name */
- image_name = fit_get_name(fit, image_noffset, NULL);
- if (!image_name) {
- printf("Can't get image name\n");
- return -1;
- }
- /* 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;
- }
- /*
- * Don't cipher ciphered data.
- *
- * If the data-size-unciphered property is present the data for this
- * image is already encrypted. This is important as 'mkimage -F' can be
- * run multiple times on a FIT image.
- */
- if (fdt_getprop(fit, image_noffset, "data-size-unciphered", &len))
- return 0;
- if (len != -FDT_ERR_NOTFOUND) {
- printf("Failure testing for data-size-unciphered\n");
- return -1;
- }
- /* Process cipher node if present */
- cipher_node_offset = fdt_subnode_offset(fit, image_noffset,
- FIT_CIPHER_NODENAME);
- if (cipher_node_offset == -FDT_ERR_NOTFOUND)
- return 0;
- if (cipher_node_offset < 0) {
- printf("Failure getting cipher node\n");
- return -1;
- }
- if (!IMAGE_ENABLE_ENCRYPT || !keydir)
- return 0;
- return fit_image_process_cipher(keydir, keydest, fit, image_name,
- image_noffset, cipher_node_offset, data, size, cmdname);
- }
- /**
- * fit_image_add_verification_data() - calculate/set verig. data for image node
- *
- * This adds hash and signature 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)
- *
- * For signature details, please see doc/uImage.FIT/signature.txt
- *
- * @keydir Directory containing *.key and *.crt files (or NULL)
- * @keydest FDT Blob to write public keys into (NULL if none)
- * @fit: Pointer to the FIT format image header
- * @image_noffset: Requested component image node
- * @comment: Comment to add to signature nodes
- * @require_keys: Mark all keys as 'required'
- * @engine_id: Engine to use for signing
- * @return: 0 on success, <0 on failure
- */
- int fit_image_add_verification_data(const char *keydir, void *keydest,
- void *fit, int image_noffset, const char *comment,
- int require_keys, const char *engine_id, const char *cmdname)
- {
- 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);
- } else if (IMAGE_ENABLE_SIGN && keydir &&
- !strncmp(node_name, FIT_SIG_NODENAME,
- strlen(FIT_SIG_NODENAME))) {
- ret = fit_image_process_sig(keydir, keydest,
- fit, image_name, noffset, data, size,
- comment, require_keys, engine_id, cmdname);
- }
- if (ret)
- return ret;
- }
- return 0;
- }
- struct strlist {
- int count;
- char **strings;
- };
- static void strlist_init(struct strlist *list)
- {
- memset(list, '\0', sizeof(*list));
- }
- static void strlist_free(struct strlist *list)
- {
- int i;
- for (i = 0; i < list->count; i++)
- free(list->strings[i]);
- free(list->strings);
- }
- static int strlist_add(struct strlist *list, const char *str)
- {
- char *dup;
- dup = strdup(str);
- list->strings = realloc(list->strings,
- (list->count + 1) * sizeof(char *));
- if (!list || !str)
- return -1;
- list->strings[list->count++] = dup;
- return 0;
- }
- static const char *fit_config_get_image_list(void *fit, int noffset,
- int *lenp, int *allow_missingp)
- {
- static const char default_list[] = FIT_KERNEL_PROP "\0"
- FIT_FDT_PROP;
- const char *prop;
- /* If there is an "image" property, use that */
- prop = fdt_getprop(fit, noffset, "sign-images", lenp);
- if (prop) {
- *allow_missingp = 0;
- return *lenp ? prop : NULL;
- }
- /* Default image list */
- *allow_missingp = 1;
- *lenp = sizeof(default_list);
- return default_list;
- }
- static int fit_config_get_hash_list(void *fit, int conf_noffset,
- int sig_offset, struct strlist *node_inc)
- {
- int allow_missing;
- const char *prop, *iname, *end;
- const char *conf_name, *sig_name;
- char name[200], path[200];
- int image_count;
- int ret, len;
- conf_name = fit_get_name(fit, conf_noffset, NULL);
- sig_name = fit_get_name(fit, sig_offset, NULL);
- /*
- * Build a list of nodes we need to hash. We always need the root
- * node and the configuration.
- */
- strlist_init(node_inc);
- snprintf(name, sizeof(name), "%s/%s", FIT_CONFS_PATH, conf_name);
- if (strlist_add(node_inc, "/") ||
- strlist_add(node_inc, name))
- goto err_mem;
- /* Get a list of images that we intend to sign */
- prop = fit_config_get_image_list(fit, sig_offset, &len,
- &allow_missing);
- if (!prop)
- return 0;
- /* Locate the images */
- end = prop + len;
- image_count = 0;
- for (iname = prop; iname < end; iname += strlen(iname) + 1) {
- int noffset;
- int image_noffset;
- int hash_count;
- image_noffset = fit_conf_get_prop_node(fit, conf_noffset,
- iname);
- if (image_noffset < 0) {
- printf("Failed to find image '%s' in configuration '%s/%s'\n",
- iname, conf_name, sig_name);
- if (allow_missing)
- continue;
- return -ENOENT;
- }
- ret = fdt_get_path(fit, image_noffset, path, sizeof(path));
- if (ret < 0)
- goto err_path;
- if (strlist_add(node_inc, path))
- goto err_mem;
- snprintf(name, sizeof(name), "%s/%s", FIT_CONFS_PATH,
- conf_name);
- /* Add all this image's hashes */
- hash_count = 0;
- for (noffset = fdt_first_subnode(fit, image_noffset);
- noffset >= 0;
- noffset = fdt_next_subnode(fit, noffset)) {
- const char *name = fit_get_name(fit, noffset, NULL);
- if (strncmp(name, FIT_HASH_NODENAME,
- strlen(FIT_HASH_NODENAME)))
- continue;
- ret = fdt_get_path(fit, noffset, path, sizeof(path));
- if (ret < 0)
- goto err_path;
- if (strlist_add(node_inc, path))
- goto err_mem;
- hash_count++;
- }
- if (!hash_count) {
- printf("Failed to find any hash nodes in configuration '%s/%s' image '%s' - without these it is not possible to verify this image\n",
- conf_name, sig_name, iname);
- return -ENOMSG;
- }
- /* Add this image's cipher node if present */
- noffset = fdt_subnode_offset(fit, image_noffset,
- FIT_CIPHER_NODENAME);
- if (noffset != -FDT_ERR_NOTFOUND) {
- if (noffset < 0) {
- printf("Failed to get cipher node in configuration '%s/%s' image '%s': %s\n",
- conf_name, sig_name, iname,
- fdt_strerror(noffset));
- return -EIO;
- }
- ret = fdt_get_path(fit, noffset, path, sizeof(path));
- if (ret < 0)
- goto err_path;
- if (strlist_add(node_inc, path))
- goto err_mem;
- }
- image_count++;
- }
- if (!image_count) {
- printf("Failed to find any images for configuration '%s/%s'\n",
- conf_name, sig_name);
- return -ENOMSG;
- }
- return 0;
- err_mem:
- printf("Out of memory processing configuration '%s/%s'\n", conf_name,
- sig_name);
- return -ENOMEM;
- err_path:
- printf("Failed to get path for image '%s' in configuration '%s/%s': %s\n",
- iname, conf_name, sig_name, fdt_strerror(ret));
- return -ENOENT;
- }
- static int fit_config_get_data(void *fit, int conf_noffset, int noffset,
- struct image_region **regionp, int *region_countp,
- char **region_propp, int *region_proplen)
- {
- char * const exc_prop[] = {"data"};
- struct strlist node_inc;
- struct image_region *region;
- struct fdt_region fdt_regions[100];
- const char *conf_name, *sig_name;
- char path[200];
- int count, i;
- char *region_prop;
- int ret, len;
- conf_name = fit_get_name(fit, conf_noffset, NULL);
- sig_name = fit_get_name(fit, noffset, NULL);
- debug("%s: conf='%s', sig='%s'\n", __func__, conf_name, sig_name);
- /* Get a list of nodes we want to hash */
- ret = fit_config_get_hash_list(fit, conf_noffset, noffset, &node_inc);
- if (ret)
- return ret;
- /* Get a list of regions to hash */
- count = fdt_find_regions(fit, node_inc.strings, node_inc.count,
- exc_prop, ARRAY_SIZE(exc_prop),
- fdt_regions, ARRAY_SIZE(fdt_regions),
- path, sizeof(path), 1);
- if (count < 0) {
- printf("Failed to hash configuration '%s/%s': %s\n", conf_name,
- sig_name, fdt_strerror(ret));
- return -EIO;
- }
- if (count == 0) {
- printf("No data to hash for configuration '%s/%s': %s\n",
- conf_name, sig_name, fdt_strerror(ret));
- return -EINVAL;
- }
- /* Build our list of data blocks */
- region = fit_region_make_list(fit, fdt_regions, count, NULL);
- if (!region) {
- printf("Out of memory hashing configuration '%s/%s'\n",
- conf_name, sig_name);
- return -ENOMEM;
- }
- /* Create a list of all hashed properties */
- debug("Hash nodes:\n");
- for (i = len = 0; i < node_inc.count; i++) {
- debug(" %s\n", node_inc.strings[i]);
- len += strlen(node_inc.strings[i]) + 1;
- }
- region_prop = malloc(len);
- if (!region_prop) {
- printf("Out of memory setting up regions for configuration '%s/%s'\n",
- conf_name, sig_name);
- return -ENOMEM;
- }
- for (i = len = 0; i < node_inc.count;
- len += strlen(node_inc.strings[i]) + 1, i++)
- strcpy(region_prop + len, node_inc.strings[i]);
- strlist_free(&node_inc);
- *region_countp = count;
- *regionp = region;
- *region_propp = region_prop;
- *region_proplen = len;
- return 0;
- }
- static int fit_config_process_sig(const char *keydir, void *keydest,
- void *fit, const char *conf_name, int conf_noffset,
- int noffset, const char *comment, int require_keys,
- const char *engine_id, const char *cmdname)
- {
- struct image_sign_info info;
- const char *node_name;
- struct image_region *region;
- char *region_prop;
- int region_proplen;
- int region_count;
- uint8_t *value;
- uint value_len;
- int ret;
- node_name = fit_get_name(fit, noffset, NULL);
- if (fit_config_get_data(fit, conf_noffset, noffset, ®ion,
- ®ion_count, ®ion_prop, ®ion_proplen))
- return -1;
- if (fit_image_setup_sig(&info, keydir, fit, conf_name, noffset,
- require_keys ? "conf" : NULL, engine_id))
- return -1;
- ret = info.crypto->sign(&info, region, region_count, &value,
- &value_len);
- free(region);
- if (ret) {
- printf("Failed to sign '%s' signature node in '%s' conf node\n",
- node_name, conf_name);
- /* We allow keys to be missing */
- if (ret == -ENOENT)
- return 0;
- return -1;
- }
- ret = fit_image_write_sig(fit, noffset, value, value_len, comment,
- region_prop, region_proplen, cmdname);
- if (ret) {
- if (ret == -FDT_ERR_NOSPACE)
- return -ENOSPC;
- printf("Can't write signature for '%s' signature node in '%s' conf node: %s\n",
- node_name, conf_name, fdt_strerror(ret));
- return -1;
- }
- free(value);
- free(region_prop);
- /* Get keyname again, as FDT has changed and invalidated our pointer */
- info.keyname = fdt_getprop(fit, noffset, FIT_KEY_HINT, NULL);
- /* Write the public key into the supplied FDT file */
- if (keydest) {
- ret = info.crypto->add_verify_data(&info, keydest);
- if (ret) {
- printf("Failed to add verification data for '%s' signature node in '%s' configuration node\n",
- node_name, conf_name);
- }
- return ret;
- }
- return 0;
- }
- static int fit_config_add_verification_data(const char *keydir, void *keydest,
- void *fit, int conf_noffset, const char *comment,
- int require_keys, const char *engine_id, const char *cmdname)
- {
- const char *conf_name;
- int noffset;
- conf_name = fit_get_name(fit, conf_noffset, NULL);
- /* Process all hash subnodes of the configuration node */
- for (noffset = fdt_first_subnode(fit, conf_noffset);
- noffset >= 0;
- noffset = fdt_next_subnode(fit, noffset)) {
- const char *node_name;
- int ret = 0;
- node_name = fit_get_name(fit, noffset, NULL);
- if (!strncmp(node_name, FIT_SIG_NODENAME,
- strlen(FIT_SIG_NODENAME))) {
- ret = fit_config_process_sig(keydir, keydest,
- fit, conf_name, conf_noffset, noffset, comment,
- require_keys, engine_id, cmdname);
- }
- if (ret)
- return ret;
- }
- return 0;
- }
- int fit_cipher_data(const char *keydir, void *keydest, void *fit,
- const char *comment, int require_keys,
- const char *engine_id, const char *cmdname)
- {
- 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_cipher_data(keydir, keydest,
- fit, noffset, comment,
- require_keys, engine_id,
- cmdname);
- if (ret)
- return ret;
- }
- return 0;
- }
- int fit_add_verification_data(const char *keydir, void *keydest, void *fit,
- const char *comment, int require_keys,
- const char *engine_id, const char *cmdname)
- {
- int images_noffset, confs_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(keydir, keydest,
- fit, noffset, comment, require_keys, engine_id,
- cmdname);
- if (ret)
- return ret;
- }
- /* If there are no keys, we can't sign configurations */
- if (!IMAGE_ENABLE_SIGN || !keydir)
- return 0;
- /* Find configurations parent node offset */
- confs_noffset = fdt_path_offset(fit, FIT_CONFS_PATH);
- if (confs_noffset < 0) {
- printf("Can't find images parent node '%s' (%s)\n",
- FIT_CONFS_PATH, fdt_strerror(confs_noffset));
- return -ENOENT;
- }
- /* Process its subnodes, print out component images details */
- for (noffset = fdt_first_subnode(fit, confs_noffset);
- noffset >= 0;
- noffset = fdt_next_subnode(fit, noffset)) {
- ret = fit_config_add_verification_data(keydir, keydest,
- fit, noffset, comment,
- require_keys,
- engine_id, cmdname);
- if (ret)
- return ret;
- }
- return 0;
- }
- #ifdef CONFIG_FIT_SIGNATURE
- int fit_check_sign(const void *fit, const void *key,
- const char *fit_uname_config)
- {
- int cfg_noffset;
- int ret;
- cfg_noffset = fit_conf_get_node(fit, fit_uname_config);
- if (!cfg_noffset)
- return -1;
- printf("Verifying Hash Integrity for node '%s'... ",
- fdt_get_name(fit, cfg_noffset, NULL));
- ret = fit_config_verify(fit, cfg_noffset);
- if (ret)
- return ret;
- printf("Verified OK, loading images\n");
- ret = bootm_host_load_images(fit, cfg_noffset);
- return ret;
- }
- #endif
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