mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-08-19 16:38:53 +09:00
![Simon Glass](/assets/img/avatar_default.png)
Move this uncommon header out of the common header. Signed-off-by: Simon Glass <sjg@chromium.org>
168 lines
3.7 KiB
C
168 lines
3.7 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (c) 2019, Softathome
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*/
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#ifdef USE_HOSTCC
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#include "mkimage.h"
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#include <time.h>
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#else
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#include <common.h>
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#include <malloc.h>
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DECLARE_GLOBAL_DATA_PTR;
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#endif /* !USE_HOSdTCC*/
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#include <image.h>
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#include <uboot_aes.h>
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#include <u-boot/aes.h>
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struct cipher_algo cipher_algos[] = {
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{
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.name = "aes128",
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.key_len = AES128_KEY_LENGTH,
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.iv_len = AES_BLOCK_LENGTH,
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#if IMAGE_ENABLE_ENCRYPT
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.calculate_type = EVP_aes_128_cbc,
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#endif
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.encrypt = image_aes_encrypt,
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.decrypt = image_aes_decrypt,
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.add_cipher_data = image_aes_add_cipher_data
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},
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{
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.name = "aes192",
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.key_len = AES192_KEY_LENGTH,
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.iv_len = AES_BLOCK_LENGTH,
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#if IMAGE_ENABLE_ENCRYPT
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.calculate_type = EVP_aes_192_cbc,
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#endif
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.encrypt = image_aes_encrypt,
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.decrypt = image_aes_decrypt,
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.add_cipher_data = image_aes_add_cipher_data
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},
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{
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.name = "aes256",
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.key_len = AES256_KEY_LENGTH,
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.iv_len = AES_BLOCK_LENGTH,
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#if IMAGE_ENABLE_ENCRYPT
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.calculate_type = EVP_aes_256_cbc,
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#endif
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.encrypt = image_aes_encrypt,
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.decrypt = image_aes_decrypt,
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.add_cipher_data = image_aes_add_cipher_data
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}
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};
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struct cipher_algo *image_get_cipher_algo(const char *full_name)
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{
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int i;
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const char *name;
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for (i = 0; i < ARRAY_SIZE(cipher_algos); i++) {
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name = cipher_algos[i].name;
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if (!strncmp(name, full_name, strlen(name)))
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return &cipher_algos[i];
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}
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return NULL;
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}
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static int fit_image_setup_decrypt(struct image_cipher_info *info,
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const void *fit, int image_noffset,
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int cipher_noffset)
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{
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const void *fdt = gd_fdt_blob();
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const char *node_name;
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char node_path[128];
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int noffset;
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char *algo_name;
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int ret;
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node_name = fit_get_name(fit, image_noffset, NULL);
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if (!node_name) {
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printf("Can't get node name\n");
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return -1;
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}
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if (fit_image_cipher_get_algo(fit, cipher_noffset, &algo_name)) {
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printf("Can't get algo name for cipher '%s' in image '%s'\n",
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node_name, node_name);
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return -1;
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}
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info->keyname = fdt_getprop(fit, cipher_noffset, FIT_KEY_HINT, NULL);
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if (!info->keyname) {
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printf("Can't get key name\n");
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return -1;
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}
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info->ivname = fdt_getprop(fit, cipher_noffset, "iv-name-hint", NULL);
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if (!info->ivname) {
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printf("Can't get IV name\n");
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return -1;
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}
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info->fit = fit;
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info->node_noffset = image_noffset;
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info->name = algo_name;
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info->cipher = image_get_cipher_algo(algo_name);
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if (!info->cipher) {
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printf("Can't get cipher\n");
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return -1;
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}
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ret = fit_image_get_data_size_unciphered(fit, image_noffset,
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&info->size_unciphered);
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if (ret) {
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printf("Can't get size of unciphered data\n");
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return -1;
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}
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/*
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* Search the cipher node in the u-boot fdt
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* the path should be: /cipher/key-<algo>-<key>-<iv>
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*/
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snprintf(node_path, sizeof(node_path), "/%s/key-%s-%s-%s",
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FIT_CIPHER_NODENAME, algo_name, info->keyname, info->ivname);
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noffset = fdt_path_offset(fdt, node_path);
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if (noffset < 0) {
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printf("Can't found cipher node offset\n");
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return -1;
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}
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/* read key */
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info->key = fdt_getprop(fdt, noffset, "key", NULL);
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if (!info->key) {
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printf("Can't get key in cipher node '%s'\n", node_path);
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return -1;
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}
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/* read iv */
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info->iv = fdt_getprop(fdt, noffset, "iv", NULL);
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if (!info->iv) {
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printf("Can't get IV in cipher node '%s'\n", node_path);
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return -1;
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}
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return 0;
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}
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int fit_image_decrypt_data(const void *fit,
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int image_noffset, int cipher_noffset,
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const void *data_ciphered, size_t size_ciphered,
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void **data_unciphered, size_t *size_unciphered)
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{
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struct image_cipher_info info;
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int ret;
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ret = fit_image_setup_decrypt(&info, fit, image_noffset,
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cipher_noffset);
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if (ret < 0)
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goto out;
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ret = info.cipher->decrypt(&info, data_ciphered, size_ciphered,
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data_unciphered, size_unciphered);
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out:
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return ret;
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}
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