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/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Copyright 2020 Broadcom Ltd.
*/
#include <common.h>
#include <wdt.h>
#include <fdtdec.h>
#include <asm/types.h>
#include <asm/byteorder.h>
#include <linux/errno.h>
#include <asm/unaligned.h>
#include <malloc.h>
#include "tpl_params.h"
#include "spl_env.h"
#include "bcm_secure.h"
#include "bcm_otp.h"
#include "u-boot/rsa.h"
#include "u-boot/rsa-mod-exp.h"
#include <u-boot/sha256.h>
#include <uboot_aes.h>
#include <watchdog.h>
#define NODE_NAME_LEN 128
static int sec_key_ctrl(bcm_sec_t *sec, bcm_sec_ctrl_t ctrl, void* arg)
{
int rc = 0;
switch(ctrl) {
case SEC_CTRL_KEY_GET:
{
if ( !(sec->state & SEC_STATE_SECURE)) {
u8* env_key = bcm_util_env_var2bin("brcm_pub_testkey", RSA2048_BYTES);
/* We've got test key; try to authenticate with it
* Only works in non-secure mode
* */
if (!env_key) {
debug("No Key in environment \n");
} else {
memcpy(sec->key.rsa_pub, env_key, RSA2048_BYTES);
sec->key.pub = sec->key.rsa_pub;
}
}
}
break;
case SEC_CTRL_KEY_CHAIN_RSA:
if(sec->state & SEC_STATE_SECURE) {
int len = 0;
u8 * k;
int off;
off = fdt_path_offset(arg, "/trust/brcm_pub_key");
if (off < 0) {
printf("ERROR: Can't find /trust/brcm_pub_key node in boot DTB!\n");
}
k = (char*)(fdt_getprop(arg, off, "value", &len));
if (!k || len != RSA2048_BYTES) {
rc = -1;
printf("ERROR: length %d \n", len);
break ;
} else {
memcpy(sec->key.rsa_pub, k, RSA2048_BYTES);
sec->key.pub = sec->key.rsa_pub;
}
}
break;
case SEC_CTRL_KEY_CHAIN_AES:
if(sec->state & SEC_STATE_SECURE) {
int len = 0, alloc_len = 0;
char *_keys_prop[2] = {FIT_AES1, FIT_AES2};
bcm_sec_key_arg_t *aes_arg;
int off;
u8* aes1,aes2;
char key_node[NODE_NAME_LEN];
/* Get aes1 */
snprintf(key_node,NODE_NAME_LEN, "/trust/%s", _keys_prop[0]);
off = fdt_path_offset(arg, key_node);
if (off < 0) {
printf("INFO: Can't find %s node in boot DTB!\n", key_node);
break;
}
aes1 = (char*)(fdt_getprop(arg, off, "value", &len));
if (aes1 && len != BCM_SECBT_AES_CBC128_EK_LEN*2) {
break;
}
/* Get aes2 */
snprintf(key_node,NODE_NAME_LEN, "/trust/%s", _keys_prop[1]);
off = fdt_path_offset(arg, key_node);
if (off < 0) {
printf("INFO: Can't find %s node in boot DTB!\n", key_node);
break;
}
aes2 = (char*)(fdt_getprop(arg, off, "value", &len));
if (aes2 && len != BCM_SECBT_AES_CBC128_EK_LEN*2) {
break;
}
alloc_len = sizeof(bcm_sec_key_arg_t) +
(aes1 && aes2) ? sizeof(bcm_sec_key_aes_arg_t)*2 : sizeof(bcm_sec_key_aes_arg_t);
aes_arg = malloc(alloc_len);
if (!aes_arg) {
break;
}
memset(aes_arg, 0, alloc_len);
if (aes1) {
//printf("Got %s 0x%x\n" , _keys_prop[0], *(u32*)aes1);
strcpy(aes_arg->aes[aes_arg->len].id,_keys_prop[0]);
memcpy(aes_arg->aes[aes_arg->len].key, aes1, BCM_SECBT_AES_CBC128_EK_LEN*2);
aes_arg->len++;
}
if (aes2) {
strcpy(aes_arg->aes[aes_arg->len].id, _keys_prop[1]);
memcpy(aes_arg->aes[aes_arg->len].key, aes2, BCM_SECBT_AES_CBC128_EK_LEN*2);
//printf("Got %s 0x%x\n" , _keys_prop[1], *(u32*)aes2);
aes_arg->len++;
}
sec->key.ch_ek = aes_arg;
}
break;
case SEC_CTRL_KEY_CLEAN_ALL:
bcm_sec_clean_keys(sec);
break;
default:
break;
}
return rc;
}
void bcm_sec_cb_init(bcm_sec_t* sec)
{
sec->cb[SEC_CTRL_ARG_KEY].cb = sec_key_ctrl;
}
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