image.c

			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;
}
#endif /* USE_HOSTCC */

/**
 * fit_image_check_hashes - verify data intergity
 * @fit: pointer to the FIT format image header
 * @image_noffset: component image node offset
 *
 * fit_image_check_hashes() goes over component image hash nodes,
 * re-calculates each data hash and compares with the value stored in hash
 * node.
 *
 * returns:
 *     1, if all hashes are valid
 *     0, otherwise (or on error)
 */
int fit_image_check_hashes (const void *fit, int image_noffset)
{
	const void	*data;
	size_t		size;
	char		*algo;
	uint8_t		*fit_value;
	int		fit_value_len;
	uint8_t		value[FIT_MAX_HASH_LEN];
	int		value_len;
	int		noffset;
	int		ndepth;
	char		*err_msg = "";

	/* 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 0;
	}

	/* 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)
				continue;

			if (fit_image_hash_get_algo (fit, noffset, &algo)) {
				err_msg = "Can't get hash algo property";
				goto error;
			}
			printf ("%s", algo);

			if (fit_image_hash_get_value (fit, noffset, &fit_value,
							&fit_value_len)) {
				err_msg = "Can't get hash value property";
				goto error;
			}

			if (calculate_hash (data, size, algo, value, &value_len)) {
				err_msg = "Unsupported hash algorithm";
				goto error;
			}

			if (value_len != fit_value_len) {
				err_msg = "Bad hash value len";
				goto error;
			} else if (memcmp (value, fit_value, value_len) != 0) {
				err_msg = "Bad hash value";
				goto error;
			}
			printf ("+ ");
		}
	}

	return 1;

error:
	printf ("%s for '%s' hash node in '%s' image node\n",
			err_msg, fit_get_name (fit, noffset, NULL),
			fit_get_name (fit, image_noffset, NULL));
	return 0;
}

/**
 * fit_image_check_os - check whether image node is of a given os type
 * @fit: pointer to the FIT format image header
 * @noffset: component image node offset
 * @os: requested image os
 *
 * fit_image_check_os() reads image os property and compares its numeric
 * id with the requested os. Comparison result is returned to the caller.
 *
 * returns:
 *     1 if image is of given os type
 *     0 otherwise (or on error)
 */
int fit_image_check_os (const void *fit, int noffset, uint8_t os)
{
	uint8_t image_os;

	if (fit_image_get_os (fit, noffset, &image_os))
		return 0;
	return (os == image_os);
}

/**
 * fit_image_check_arch - check whether image node is of a given arch
 * @fit: pointer to the FIT format image header
 * @noffset: component image node offset
 * @arch: requested imagearch
 *
 * fit_image_check_arch() reads image arch property and compares its numeric
 * id with the requested arch. Comparison result is returned to the caller.
 *
 * returns:
 *     1 if image is of given arch
 *     0 otherwise (or on error)
 */
int fit_image_check_arch (const void *fit, int noffset, uint8_t arch)
{
	uint8_t image_arch;

	if (fit_image_get_arch (fit, noffset, &image_arch))
		return 0;
	return (arch == image_arch);
}

/**
 * fit_image_check_type - check whether image node is of a given type
 * @fit: pointer to the FIT format image header
 * @noffset: component image node offset
 * @type: requested image type
 *
 * fit_image_check_type() reads image type property and compares its numeric
 * id with the requested type. Comparison result is returned to the caller.
 *
 * returns:
 *     1 if image is of given type
 *     0 otherwise (or on error)
 */
int fit_image_check_type (const void *fit, int noffset, uint8_t type)
{
	uint8_t image_type;

	if (fit_image_get_type (fit, noffset, &image_type))
		return 0;
	return (type == image_type);
}

/**
 * fit_image_check_comp - check whether image node uses given compression
 * @fit: pointer to the FIT format image header
 * @noffset: component image node offset
 * @comp: requested image compression type
 *
 * fit_image_check_comp() reads image compression property and compares its
 * numeric id with the requested compression type. Comparison result is
 * returned to the caller.
 *
 * returns:
 *     1 if image uses requested compression
 *     0 otherwise (or on error)
 */
int fit_image_check_comp (const void *fit, int noffset, uint8_t comp)
{
	uint8_t image_comp;

	if (fit_image_get_comp (fit, noffset, &image_comp))
		return 0;
	return (comp == image_comp);
}

/**
 * fit_check_format - sanity check FIT image format
 * @fit: pointer to the FIT format image header
 *
 * fit_check_format() runs a basic sanity FIT image verification.
 * Routine checks for mandatory properties, nodes, etc.
 *
 * returns:
 *     1, on success
 *     0, on failure
 */
int fit_check_format (const void *fit)
{
	/* mandatory / node 'description' property */
	if (fdt_getprop (fit, 0, FIT_DESC_PROP, NULL) == NULL) {
		debug ("Wrong FIT format: no description\n");
		return 0;
	}

#if defined(CONFIG_TIMESTAMP) || defined(CONFIG_CMD_DATE) || defined(USE_HOSTCC)
	/* mandatory / node 'timestamp' property */
	if (fdt_getprop (fit, 0, FIT_TIMESTAMP_PROP, NULL) == NULL) {
		debug ("Wrong FIT format: no description\n");
		return 0;
	}
#endif

	/* mandatory subimages parent '/images' node */
	if (fdt_path_offset (fit, FIT_IMAGES_PATH) < 0) {
		debug ("Wrong FIT format: no images parent node\n");
		return 0;
	}

	return 1;
}

/**
 * fit_conf_get_node - get node offset for configuration of a given unit name
 * @fit: pointer to the FIT format image header
 * @conf_uname: configuration node unit name
 *
 * fit_conf_get_node() finds a configuration (withing the '/configurations'
 * parant node) of a provided unit name. If configuration is found its node offset
 * is returned to the caller.
 *
 * When NULL is provided in second argument fit_conf_get_node() will search
 * for a default configuration node instead. Default configuration node unit name
 * is retrived from FIT_DEFAULT_PROP property of the '/configurations' node.
 *
 * returns:
 *     configuration node offset when found (>=0)
 *     negative number on failure (FDT_ERR_* code)
 */
int fit_conf_get_node (const void *fit, const char *conf_uname)
{
	int noffset, confs_noffset;
	int len;

	confs_noffset = fdt_path_offset (fit, FIT_CONFS_PATH);
	if (confs_noffset < 0) {
		debug ("Can't find configurations parent node '%s' (%s)\n",
			FIT_CONFS_PATH, fdt_strerror (confs_noffset));
		return confs_noffset;
	}

	if (conf_uname == NULL) {
		/* get configuration unit name from the default property */
		debug ("No configuration specified, trying default...\n");
		conf_uname = (char *)fdt_getprop (fit, confs_noffset, FIT_DEFAULT_PROP, &len);
		if (conf_uname == NULL) {
			fit_get_debug (fit, confs_noffset, FIT_DEFAULT_PROP, len);
			return len;
		}
		debug ("Found default configuration: '%s'\n", conf_uname);
	}

	noffset = fdt_subnode_offset (fit, confs_noffset, conf_uname);
	if (noffset < 0) {
		debug ("Can't get node offset for configuration unit name: '%s' (%s)\n",
			conf_uname, fdt_strerror (noffset));
	}

	return noffset;
}

static int __fit_conf_get_prop_node (const void *fit, int noffset,
		const char *prop_name)
{
	char *uname;
	int len;

	/* get kernel image unit name from configuration kernel property */
	uname = (char *)fdt_getprop (fit, noffset, prop_name, &len);
	if (uname == NULL)
		return len;

	return fit_image_get_node (fit, uname);
}

/**
 * fit_conf_get_kernel_node - get kernel image node offset that corresponds to
 * a given configuration
 * @fit: pointer to the FIT format image header
 * @noffset: configuration node offset
 *
 * fit_conf_get_kernel_node() retrives kernel image node unit name from
 * configuration FIT_KERNEL_PROP property and translates it to the node
 * offset.
 *
 * returns:
 *     image node offset when found (>=0)
 *     negative number on failure (FDT_ERR_* code)
 */
int fit_conf_get_kernel_node (const void *fit, int noffset)
{
	return __fit_conf_get_prop_node (fit, noffset, FIT_KERNEL_PROP);
}

/**
 * fit_conf_get_ramdisk_node - get ramdisk image node offset that corresponds to
 * a given configuration
 * @fit: pointer to the FIT format image header
 * @noffset: configuration node offset
 *
 * fit_conf_get_ramdisk_node() retrives ramdisk image node unit name from
 * configuration FIT_KERNEL_PROP property and translates it to the node
 * offset.
 *
 * returns:
 *     image node offset when found (>=0)
 *     negative number on failure (FDT_ERR_* code)
 */
int fit_conf_get_ramdisk_node (const void *fit, int noffset)
{
	return __fit_conf_get_prop_node (fit, noffset, FIT_RAMDISK_PROP);
}

/**
 * fit_conf_get_fdt_node - get fdt image node offset that corresponds to
 * a given configuration
 * @fit: pointer to the FIT format image header
 * @noffset: configuration node offset
 *
 * fit_conf_get_fdt_node() retrives fdt image node unit name from
 * configuration FIT_KERNEL_PROP property and translates it to the node
 * offset.
 *
 * returns:
 *     image node offset when found (>=0)
 *     negative number on failure (FDT_ERR_* code)
 */
int fit_conf_get_fdt_node (const void *fit, int noffset)
{
	return __fit_conf_get_prop_node (fit, noffset, FIT_FDT_PROP);
}

/**
 * fit_conf_print - prints out the FIT configuration details
 * @fit: pointer to the FIT format image header
 * @conf_noffset: offset of the configuration node
 * @p: pointer to prefix string
 *
 * fit_conf_print() lists all mandatory properies for the processed
 * configuration node.
 *
 * returns:
 *     no returned results
 */
void fit_conf_print (const void *fit, int noffset, const char *p)
{
	char *desc;
	char *uname;
	int ret;

	/* Mandatory properties */
	ret = fit_get_desc (fit, noffset, &desc);
	printf ("%s  Description:  ", p);
	if (ret)
		printf ("unavailable\n");
	else
		printf ("%s\n", desc);

	uname = (char *)fdt_getprop (fit, noffset, FIT_KERNEL_PROP, NULL);
	printf ("%s  Kernel:       ", p);
	if (uname == NULL)
		printf ("unavailable\n");
	else
		printf ("%s\n", uname);

	/* Optional properties */
	uname = (char *)fdt_getprop (fit, noffset, FIT_RAMDISK_PROP, NULL);
	if (uname)
		printf ("%s  Init Ramdisk: %s\n", p, uname);

	uname = (char *)fdt_getprop (fit, noffset, FIT_FDT_PROP, NULL);
	if (uname)
		printf ("%s  FDT:          %s\n", p, uname);
}

/**
 * fit_check_ramdisk - verify FIT format ramdisk subimage
 * @fit_hdr: pointer to the FIT ramdisk header
 * @rd_noffset: ramdisk subimage node offset within FIT image
 * @arch: requested ramdisk image architecture type
 * @verify: data CRC verification flag
 *
 * fit_check_ramdisk() verifies integrity of the ramdisk subimage and from
 * specified FIT image.
 *
 * returns:
 *     1, on success
 *     0, on failure
 */
#ifndef USE_HOSTCC
static int fit_check_ramdisk (const void *fit, int rd_noffset, uint8_t arch, int verify)
{
	fit_image_print (fit, rd_noffset, "   ");

	if (verify) {
		puts ("   Verifying Hash Integrity ... ");
		if (!fit_image_check_hashes (fit, rd_noffset)) {
			puts ("Bad Data Hash\n");
			show_boot_progress (-125);
			return 0;
		}
		puts ("OK\n");
	}

	show_boot_progress (126);
	if (!fit_image_check_os (fit, rd_noffset, IH_OS_LINUX) ||
	    !fit_image_check_arch (fit, rd_noffset, arch) ||
	    !fit_image_check_type (fit, rd_noffset, IH_TYPE_RAMDISK)) {
		printf ("No Linux %s Ramdisk Image\n",
				genimg_get_arch_name(arch));
		show_boot_progress (-126);
		return 0;
	}

	show_boot_progress (127);
	return 1;
}
#endif /* USE_HOSTCC */
#endif /* CONFIG_FIT */