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mkimage: fit: add support to encrypt image with aes

Browse source 
This commit add the support of encrypting image with aes
in mkimage. To enable the ciphering, a node cipher with
a reference to a key and IV (Initialization Vector) must
be added to the its file. Then mkimage add the encrypted
image to the FIT and add the key and IV to the u-boot
device tree.

Signed-off-by: Philippe Reynes <philippe.reynes@softathome.com>
This commit is contained in:
Philippe Reynes 2019-12-18 18:25:41 +01:00 committed by Tom Rini
parent 1c6cd16de8
commit 7298e42250
10 changed files with 716 additions and 2 deletions
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8
Kconfig
View file

@ -383,6 +383,14 @@ config FIT_ENABLE_RSASSA_PSS_SUPPORT
Enable this to support the pss padding algorithm as described
in the rfc8017 (https://tools.ietf.org/html/rfc8017).
config FIT_CIPHER
bool "Enable ciphering data in a FIT uImages"
depends on DM
select AES
help
Enable the feature of data ciphering/unciphering in the tool mkimage
and in the u-boot support of the FIT image.
config FIT_VERBOSE
bool "Show verbose messages when FIT images fail"
help

1
common/Makefile
View file

@ -113,6 +113,7 @@ obj-$(CONFIG_$(SPL_TPL_)OF_LIBFDT) += image-fdt.o
obj-$(CONFIG_$(SPL_TPL_)FIT) += image-fit.o
obj-$(CONFIG_$(SPL_)MULTI_DTB_FIT) += boot_fit.o common_fit.o
obj-$(CONFIG_$(SPL_TPL_)FIT_SIGNATURE) += image-sig.o
obj-$(CONFIG_$(SPL_TPL_)FIT_CIPHER) += image-cipher.o
obj-$(CONFIG_IO_TRACE) += iotrace.o
obj-y += memsize.o
obj-y += stdio.o

63
common/image-cipher.c Normal file
View file

@ -0,0 +1,63 @@
// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (c) 2019, Softathome
*/
#ifdef USE_HOSTCC
#include "mkimage.h"
#include <time.h>
#else
#include <common.h>
#include <malloc.h>
DECLARE_GLOBAL_DATA_PTR;
#endif /* !USE_HOSTCC*/
#include <image.h>
#include <uboot_aes.h>
#include <u-boot/aes.h>
struct cipher_algo cipher_algos[] = {
{
.name = "aes128",
.key_len = AES128_KEY_LENGTH,
.iv_len = AES_BLOCK_LENGTH,
#if IMAGE_ENABLE_ENCRYPT
.calculate_type = EVP_aes_128_cbc,
#endif
.encrypt = image_aes_encrypt,
.add_cipher_data = image_aes_add_cipher_data
},
{
.name = "aes192",
.key_len = AES192_KEY_LENGTH,
.iv_len = AES_BLOCK_LENGTH,
#if IMAGE_ENABLE_ENCRYPT
.calculate_type = EVP_aes_192_cbc,
#endif
.encrypt = image_aes_encrypt,
.add_cipher_data = image_aes_add_cipher_data
},
{
.name = "aes256",
.key_len = AES256_KEY_LENGTH,
.iv_len = AES_BLOCK_LENGTH,
#if IMAGE_ENABLE_ENCRYPT
.calculate_type = EVP_aes_256_cbc,
#endif
.encrypt = image_aes_encrypt,
.add_cipher_data = image_aes_add_cipher_data
}
};
struct cipher_algo *image_get_cipher_algo(const char *full_name)
{
int i;
const char *name;
for (i = 0; i < ARRAY_SIZE(cipher_algos); i++) {
name = cipher_algos[i].name;
if (!strncmp(name, full_name, strlen(name)))
return &cipher_algos[i];
}
return NULL;
}

27
common/image-fit.c
View file

@ -1080,6 +1080,33 @@ static int fit_image_hash_get_ignore(const void *fit, int noffset, int *ignore)
return 0;
}
/**
* fit_image_cipher_get_algo - get cipher algorithm name
* @fit: pointer to the FIT format image header
* @noffset: cipher node offset
* @algo: double pointer to char, will hold pointer to the algorithm name
*
* fit_image_cipher_get_algo() finds cipher algorithm property in a given
* cipher node. If the property is found its data start address is returned
* to the caller.
*
* returns:
* 0, on success
* -1, on failure
*/
int fit_image_cipher_get_algo(const void *fit, int noffset, char **algo)
{
int len;
*algo = (char *)fdt_getprop(fit, noffset, FIT_ALGO_PROP, &len);
if (!*algo) {
fit_get_debug(fit, noffset, FIT_ALGO_PROP, len);
return -1;
}
return 0;
}
ulong fit_get_end(const void *fit)
{
return map_to_sysmem((void *)(fit + fdt_totalsize(fit)));

63
include/image.h
View file

@ -930,6 +930,10 @@ int booti_setup(ulong image, ulong *relocated_addr, ulong *size,
#define FIT_IGNORE_PROP "uboot-ignore"
#define FIT_SIG_NODENAME "signature"
/* cipher node */
#define FIT_CIPHER_NODENAME "cipher"
#define FIT_ALGO_PROP "algo"
/* image node */
#define FIT_DATA_PROP "data"
#define FIT_DATA_POSITION_PROP "data-position"
@ -1028,6 +1032,10 @@ int fit_image_hash_get_value(const void *fit, int noffset, uint8_t **value,
int fit_set_timestamp(void *fit, int noffset, time_t timestamp);
int fit_cipher_data(const char *keydir, void *keydest, void *fit,
const char *comment, int require_keys,
const char *engine_id, const char *cmdname);
/**
* fit_add_verification_data() - add verification data to FIT image nodes
*
@ -1138,6 +1146,7 @@ struct image_sign_info {
const char *require_keys; /* Value for 'required' property */
const char *engine_id; /* Engine to use for signing */
};
#endif /* Allow struct image_region to always be defined for rsa.h */
/* A part of an image, used for hashing */
@ -1310,6 +1319,60 @@ static inline int fit_image_check_target_arch(const void *fdt, int node)
#endif
}
/*
* At present we only support ciphering on the host, and unciphering on the
* device
*/
#if defined(USE_HOSTCC)
# if defined(CONFIG_FIT_CIPHER)
# define IMAGE_ENABLE_ENCRYPT 1
# define IMAGE_ENABLE_DECRYPT 1
# include <openssl/evp.h>
# else
# define IMAGE_ENABLE_ENCRYPT 0
# define IMAGE_ENABLE_DECRYPT 0
# endif
#else
# define IMAGE_ENABLE_ENCRYPT 0
# define IMAGE_ENABLE_DECRYPT CONFIG_IS_ENABLED(FIT_CIPHER)
#endif
/* Information passed to the ciphering routines */
struct image_cipher_info {
const char *keydir; /* Directory containing keys */
const char *keyname; /* Name of key to use */
const char *ivname; /* Name of IV to use */
const void *fit; /* Pointer to FIT blob */
int node_noffset; /* Offset of the cipher node */
const char *name; /* Algorithm name */
struct cipher_algo *cipher; /* Cipher algorithm information */
const void *fdt_blob; /* FDT containing key and IV */
const void *key; /* Value of the key */
const void *iv; /* Value of the IV */
size_t size_unciphered; /* Size of the unciphered data */
};
struct cipher_algo {
const char *name; /* Name of algorithm */
int key_len; /* Length of the key */
int iv_len; /* Length of the IV */
#if IMAGE_ENABLE_ENCRYPT
const EVP_CIPHER * (*calculate_type)(void);
#endif
int (*encrypt)(struct image_cipher_info *info,
const unsigned char *data, int data_len,
unsigned char **cipher, int *cipher_len);
int (*add_cipher_data)(struct image_cipher_info *info,
void *keydest);
};
int fit_image_cipher_get_algo(const void *fit, int noffset, char **algo);
struct cipher_algo *image_get_cipher_algo(const char *full_name);
#ifdef CONFIG_FIT_VERBOSE
#define fit_unsupported(msg) printf("! %s:%d " \
"FIT images not supported for '%s'\n", \

31
include/u-boot/aes.h Normal file
View file

@ -0,0 +1,31 @@
/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Copyright (c) 2019, Softathome
*/
#ifndef _AES_H
#define _AES_H
#include <errno.h>
#include <image.h>
#if IMAGE_ENABLE_ENCRYPT
int image_aes_encrypt(struct image_cipher_info *info,
const unsigned char *data, int size,
unsigned char **cipher, int *cipher_len);
int image_aes_add_cipher_data(struct image_cipher_info *info, void *keydest);
#else
int image_aes_encrypt(struct image_cipher_info *info,
const unsigned char *data, int size,
unsigned char **cipher, int *cipher_len)
{
return -ENXIO;
}
int image_aes_add_cipher_data(struct image_cipher_info *info, void *keydest)
{
return -ENXIO;
}
#endif /* IMAGE_ENABLE_ENCRYPT */
#endif

136
lib/aes/aes-encrypt.c Normal file
View file

@ -0,0 +1,136 @@
// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (c) 2019,Softathome
*/
#include "mkimage.h"
#include <stdio.h>
#include <string.h>
#include <image.h>
#include <time.h>
#include <openssl/bn.h>
#include <openssl/rsa.h>
#include <openssl/pem.h>
#include <openssl/err.h>
#include <openssl/ssl.h>
#include <openssl/evp.h>
#include <openssl/engine.h>
#include <uboot_aes.h>
#if OPENSSL_VERSION_NUMBER >= 0x10000000L
#define HAVE_ERR_REMOVE_THREAD_STATE
#endif
int image_aes_encrypt(struct image_cipher_info *info,
unsigned char *data, int size,
unsigned char **cipher, int *cipher_len)
{
EVP_CIPHER_CTX *ctx;
unsigned char *buf = NULL;
int buf_len, len, ret = 0;
/* create and initialise the context */
ctx = EVP_CIPHER_CTX_new();
if (!ctx) {
printf("Can't create context\n");
return -1;
}
/* allocate a buffer for the result */
buf = malloc(size + AES_BLOCK_LENGTH);
if (!buf) {
printf("Can't allocate memory to encrypt\n");
ret = -1;
goto out;
}
if (EVP_EncryptInit_ex(ctx, info->cipher->calculate_type(),
NULL, info->key, info->iv) != 1) {
printf("Can't init encryption\n");
ret = -1;
goto out;
}
if (EVP_EncryptUpdate(ctx, buf, &len, data, size) != 1) {
printf("Can't encrypt data\n");
ret = -1;
goto out;
}
buf_len = len;
if (EVP_EncryptFinal_ex(ctx, buf + len, &len) != 1) {
printf("Can't finalise the encryption\n");
ret = -1;
goto out;
}
buf_len += len;
*cipher = buf;
*cipher_len = buf_len;
out:
EVP_CIPHER_CTX_free(ctx);
return ret;
}
int image_aes_add_cipher_data(struct image_cipher_info *info, void *keydest)
{
int parent, node;
char name[128];
int ret = 0;
/* Either create or overwrite the named cipher node */
parent = fdt_subnode_offset(keydest, 0, FIT_CIPHER_NODENAME);
if (parent == -FDT_ERR_NOTFOUND) {
parent = fdt_add_subnode(keydest, 0, FIT_CIPHER_NODENAME);
if (parent < 0) {
ret = parent;
if (ret != -FDT_ERR_NOSPACE) {
fprintf(stderr,
"Couldn't create cipher node: %s\n",
fdt_strerror(parent));
}
}
}
if (ret)
goto done;
/* Either create or overwrite the named key node */
snprintf(name, sizeof(name), "key-%s-%s-%s",
info->name, info->keyname, info->ivname);
node = fdt_subnode_offset(keydest, parent, name);
if (node == -FDT_ERR_NOTFOUND) {
node = fdt_add_subnode(keydest, parent, name);
if (node < 0) {
ret = node;
if (ret != -FDT_ERR_NOSPACE) {
fprintf(stderr,
"Could not create key subnode: %s\n",
fdt_strerror(node));
}
}
} else if (node < 0) {
fprintf(stderr, "Cannot select keys parent: %s\n",
fdt_strerror(node));
ret = node;
}
if (!ret)
ret = fdt_setprop(keydest, node, "iv",
info->iv, info->cipher->iv_len);
if (!ret)
ret = fdt_setprop(keydest, node, "key",
info->key, info->cipher->key_len);
if (!ret)
ret = fdt_setprop_u32(keydest, node, "key-len",
info->cipher->key_len);
done:
if (ret)
ret = ret == -FDT_ERR_NOSPACE ? -ENOSPC : -EIO;
return ret;
}

14
tools/Makefile
View file

@ -59,6 +59,7 @@ hostprogs-$(CONFIG_CMD_BOOTEFI_SELFTEST) += file2include
FIT_OBJS-$(CONFIG_FIT) := fit_common.o fit_image.o image-host.o common/image-fit.o
FIT_SIG_OBJS-$(CONFIG_FIT_SIGNATURE) := common/image-sig.o
FIT_CIPHER_OBJS-$(CONFIG_FIT_CIPHER) := common/image-cipher.o
# The following files are synced with upstream DTC.
# Use synced versions from scripts/dtc/libfdt/.
@ -75,6 +76,9 @@ RSA_OBJS-$(CONFIG_FIT_SIGNATURE) := $(addprefix lib/rsa/, \
rsa-sign.o rsa-verify.o rsa-checksum.o \
rsa-mod-exp.o)
AES_OBJS-$(CONFIG_FIT_CIPHER) := $(addprefix lib/aes/, \
aes-encrypt.o)
ROCKCHIP_OBS = lib/rc4.o rkcommon.o rkimage.o rksd.o rkspi.o
# common objs for dumpimage and mkimage
@ -82,6 +86,7 @@ dumpimage-mkimage-objs := aisimage.o \
atmelimage.o \
$(FIT_OBJS-y) \
$(FIT_SIG_OBJS-y) \
$(FIT_CIPHER_OBJS-y) \
common/bootm.o \
lib/crc32.o \
default_image.o \
@ -116,7 +121,8 @@ dumpimage-mkimage-objs := aisimage.o \
gpimage.o \
gpimage-common.o \
mtk_image.o \
$(RSA_OBJS-y)
$(RSA_OBJS-y) \
$(AES_OBJS-y)
dumpimage-objs := $(dumpimage-mkimage-objs) dumpimage.o
mkimage-objs := $(dumpimage-mkimage-objs) mkimage.o
@ -137,6 +143,12 @@ HOST_EXTRACFLAGS += -DCONFIG_FIT_SIGNATURE
HOST_EXTRACFLAGS += -DCONFIG_FIT_SIGNATURE_MAX_SIZE=$(CONFIG_FIT_SIGNATURE_MAX_SIZE)
endif
ifdef CONFIG_FIT_CIPHER
# This affects include/image.h, but including the board config file
# is tricky, so manually define this options here.
HOST_EXTRACFLAGS += -DCONFIG_FIT_CIPHER
endif
ifdef CONFIG_SYS_U_BOOT_OFFS
HOSTCFLAGS_kwbimage.o += -DCONFIG_SYS_U_BOOT_OFFS=$(CONFIG_SYS_U_BOOT_OFFS)
endif

83
tools/fit_image.c
View file

@ -58,6 +58,14 @@ static int fit_add_file_data(struct image_tool_params *params, size_t size_inc,
ret = fit_set_timestamp(ptr, 0, time);
}
if (!ret) {
ret = fit_cipher_data(params->keydir, dest_blob, ptr,
params->comment,
params->require_keys,
params->engine_id,
params->cmdname);
}
if (!ret) {
ret = fit_add_verification_data(params->keydir, dest_blob, ptr,
params->comment,
@ -74,7 +82,6 @@ static int fit_add_file_data(struct image_tool_params *params, size_t size_inc,
err_keydest:
munmap(ptr, sbuf.st_size);
close(tfd);
return ret;
}
@ -621,6 +628,62 @@ err_no_fd:
return ret;
}
static int copyfile(const char *src, const char *dst)
{
int fd_src = -1, fd_dst = -1;
void *buf = NULL;
ssize_t size;
size_t count;
int ret = -1;
fd_src = open(src, O_RDONLY);
if (fd_src < 0) {
printf("Can't open file %s (%s)\n", src, strerror(errno));
goto out;
}
fd_dst = open(dst, O_WRONLY | O_CREAT, 0700);
if (fd_dst < 0) {
printf("Can't open file %s (%s)\n", dst, strerror(errno));
goto out;
}
buf = malloc(512);
if (!buf) {
printf("Can't allocate buffer to copy file\n");
goto out;
}
while (1) {
size = read(fd_src, buf, 512);
if (size < 0) {
printf("Can't read file %s\n", src);
goto out;
}
if (!size)
break;
count = size;
size = write(fd_dst, buf, count);
if (size < 0) {
printf("Can't write file %s\n", dst);
goto out;
}
}
ret = 0;
out:
if (fd_src >= 0)
close(fd_src);
if (fd_dst >= 0)
close(fd_dst);
if (buf)
free(buf);
return ret;
}
/**
* fit_handle_file - main FIT file processing function
*
@ -636,6 +699,7 @@ err_no_fd:
static int fit_handle_file(struct image_tool_params *params)
{
char tmpfile[MKIMAGE_MAX_TMPFILE_LEN];
char bakfile[MKIMAGE_MAX_TMPFILE_LEN + 4] = {0};
char cmd[MKIMAGE_MAX_DTC_CMDLINE_LEN];
size_t size_inc;
int ret;
@ -670,6 +734,7 @@ static int fit_handle_file(struct image_tool_params *params)
snprintf(cmd, sizeof(cmd), "cp \"%s\" \"%s\"",
params->imagefile, tmpfile);
}
if (*cmd && system(cmd) == -1) {
fprintf (stderr, "%s: system(%s) failed: %s\n",
params->cmdname, cmd, strerror(errno));
@ -681,6 +746,14 @@ static int fit_handle_file(struct image_tool_params *params)
if (ret)
goto err_system;
/*
* Copy the tmpfile to bakfile, then in the following loop
* we copy bakfile to tmpfile. So we always start from the
* beginning.
*/
sprintf(bakfile, "%s%s", tmpfile, ".bak");
rename(tmpfile, bakfile);
/*
* Set hashes for images in the blob. Unfortunately we may need more
* space in either FDT, so keep trying until we succeed.
@ -692,6 +765,11 @@ static int fit_handle_file(struct image_tool_params *params)
* steps of this loop is enough to sign with several keys.
*/
for (size_inc = 0; size_inc < 64 * 1024; size_inc += 1024) {
if (copyfile(bakfile, tmpfile) < 0) {
printf("Can't copy %s to %s\n", bakfile, tmpfile);
ret = -EIO;
break;
}
ret = fit_add_file_data(params, size_inc, tmpfile);
if (!ret || ret != -ENOSPC)
break;
@ -715,13 +793,16 @@ static int fit_handle_file(struct image_tool_params *params)
params->cmdname, tmpfile, params->imagefile,
strerror (errno));
unlink (tmpfile);
unlink(bakfile);
unlink (params->imagefile);
return EXIT_FAILURE;
}
unlink(bakfile);
return EXIT_SUCCESS;
err_system:
unlink(tmpfile);
unlink(bakfile);
return -1;
}

292
tools/image-host.c
View file

@ -12,6 +12,7 @@
#include <bootm.h>
#include <image.h>
#include <version.h>
#include <uboot_aes.h>
/**
* fit_set_hash_value - set hash value in requested has node
@ -268,6 +269,262 @@ static int fit_image_process_sig(const char *keydir, void *keydest,
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 %ld 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,
const char *node_name, 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 '%s' in image '%s'\n",
node_name, image_name);
goto out;
}
info->keydir = keydir;
/* Read the key name */
info->keyname = fdt_getprop(fit, noffset, "key-name-hint", NULL);
if (!info->keyname) {
printf("Can't get key name for cipher '%s' in image '%s'\n",
node_name, 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 '%s' in image '%s'\n",
node_name, 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;
/* Remove unciphered data */
ret = fdt_delprop(fit, image_noffset, FIT_DATA_PROP);
if (ret) {
printf("Can't remove data (err = %d)\n", ret);
goto out;
}
/* Add ciphered data */
ret = fdt_setprop(fit, image_noffset, FIT_DATA_PROP,
data_ciphered, data_ciphered_len);
if (ret) {
printf("Can't add 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) {
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,
const char *node_name, 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_name, 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 node_noffset;
/* 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;
}
/* Process all hash subnodes of the component image node */
for (node_noffset = fdt_first_subnode(fit, image_noffset);
node_noffset >= 0;
node_noffset = fdt_next_subnode(fit, node_noffset)) {
const char *node_name;
int ret = 0;
node_name = fit_get_name(fit, node_noffset, NULL);
if (!node_name) {
printf("Can't get node name\n");
return -1;
}
if (IMAGE_ENABLE_ENCRYPT && keydir &&
!strncmp(node_name, FIT_CIPHER_NODENAME,
strlen(FIT_CIPHER_NODENAME)))
ret = fit_image_process_cipher(keydir, keydest,
fit, image_name,
image_noffset,
node_name, node_noffset,
data, size, cmdname);
if (ret)
return ret;
}
return 0;
}
/**
* fit_image_add_verification_data() - calculate/set verig. data for image node
*
@ -675,6 +932,41 @@ static int fit_config_add_verification_data(const char *keydir, void *keydest,
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)