+/**
+ * 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];
+ int value_len;
+ char *algo;
+
+ /*
+ * 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)
+ return 0;
+
+ 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), 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, fit_get_name(fit, noffset, NULL), image_name);
+ 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), image_name);
+ return -1;
+ }
+
+ return 0;
+}
+