X-Git-Url: https://git.kernelconcepts.de/?a=blobdiff_plain;f=common%2Fenv_common.c;h=af59c72e1fd7d502f4899d99e8a1458cc7354d13;hb=9e9dd02ae178e0db586fc6eee80a208fc270defe;hp=61c4be54d0ea28e22e0f937235d3b27483a60a67;hpb=bd23b22badadcdc414a900828253961fc5ec6c39;p=karo-tx-uboot.git diff --git a/common/env_common.c b/common/env_common.c index 61c4be54d0..af59c72e1f 100644 --- a/common/env_common.c +++ b/common/env_common.c @@ -5,23 +5,7 @@ * (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH * Andreas Heppel * - * See file CREDITS for list of people who contributed to this - * project. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License as - * published by the Free Software Foundation; either version 2 of - * the License, or (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, - * MA 02111-1307 USA + * SPDX-License-Identifier: GPL-2.0+ */ #include @@ -37,113 +21,16 @@ DECLARE_GLOBAL_DATA_PTR; /************************************************************************ * Default settings to be used when no valid environment is found */ - -const uchar default_environment[] = { -#ifdef CONFIG_BOOTARGS - "bootargs=" CONFIG_BOOTARGS "\0" -#endif -#ifdef CONFIG_BOOTCOMMAND - "bootcmd=" CONFIG_BOOTCOMMAND "\0" -#endif -#ifdef CONFIG_RAMBOOTCOMMAND - "ramboot=" CONFIG_RAMBOOTCOMMAND "\0" -#endif -#ifdef CONFIG_NFSBOOTCOMMAND - "nfsboot=" CONFIG_NFSBOOTCOMMAND "\0" -#endif -#if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0) - "bootdelay=" __stringify(CONFIG_BOOTDELAY) "\0" -#endif -#if defined(CONFIG_BAUDRATE) && (CONFIG_BAUDRATE >= 0) - "baudrate=" __stringify(CONFIG_BAUDRATE) "\0" -#endif -#ifdef CONFIG_LOADS_ECHO - "loads_echo=" __stringify(CONFIG_LOADS_ECHO) "\0" -#endif -#ifdef CONFIG_ETHADDR - "ethaddr=" __stringify(CONFIG_ETHADDR) "\0" -#endif -#ifdef CONFIG_ETH1ADDR - "eth1addr=" __stringify(CONFIG_ETH1ADDR) "\0" -#endif -#ifdef CONFIG_ETH2ADDR - "eth2addr=" __stringify(CONFIG_ETH2ADDR) "\0" -#endif -#ifdef CONFIG_ETH3ADDR - "eth3addr=" __stringify(CONFIG_ETH3ADDR) "\0" -#endif -#ifdef CONFIG_ETH4ADDR - "eth4addr=" __stringify(CONFIG_ETH4ADDR) "\0" -#endif -#ifdef CONFIG_ETH5ADDR - "eth5addr=" __stringify(CONFIG_ETH5ADDR) "\0" -#endif -#ifdef CONFIG_ETHPRIME - "ethprime=" CONFIG_ETHPRIME "\0" -#endif -#ifdef CONFIG_IPADDR - "ipaddr=" __stringify(CONFIG_IPADDR) "\0" -#endif -#ifdef CONFIG_SERVERIP - "serverip=" __stringify(CONFIG_SERVERIP) "\0" -#endif -#ifdef CONFIG_SYS_AUTOLOAD - "autoload=" CONFIG_SYS_AUTOLOAD "\0" -#endif -#ifdef CONFIG_PREBOOT - "preboot=" CONFIG_PREBOOT "\0" -#endif -#ifdef CONFIG_ROOTPATH - "rootpath=" CONFIG_ROOTPATH "\0" -#endif -#ifdef CONFIG_GATEWAYIP - "gatewayip=" __stringify(CONFIG_GATEWAYIP) "\0" -#endif -#ifdef CONFIG_NETMASK - "netmask=" __stringify(CONFIG_NETMASK) "\0" -#endif -#ifdef CONFIG_HOSTNAME - "hostname=" __stringify(CONFIG_HOSTNAME) "\0" -#endif -#ifdef CONFIG_BOOTFILE - "bootfile=" CONFIG_BOOTFILE "\0" -#endif -#ifdef CONFIG_LOADADDR - "loadaddr=" __stringify(CONFIG_LOADADDR) "\0" -#endif -#ifdef CONFIG_CLOCKS_IN_MHZ - "clocks_in_mhz=1\0" -#endif -#if defined(CONFIG_PCI_BOOTDELAY) && (CONFIG_PCI_BOOTDELAY > 0) - "pcidelay=" __stringify(CONFIG_PCI_BOOTDELAY)"\0" -#endif -#ifdef CONFIG_ENV_VARS_UBOOT_CONFIG - "arch=" CONFIG_SYS_ARCH "\0" - "cpu=" CONFIG_SYS_CPU "\0" - "board=" CONFIG_SYS_BOARD "\0" -#ifdef CONFIG_SYS_VENDOR - "vendor=" CONFIG_SYS_VENDOR "\0" -#endif -#ifdef CONFIG_SYS_SOC - "soc=" CONFIG_SYS_SOC "\0" -#endif -#endif -#ifdef CONFIG_EXTRA_ENV_SETTINGS - CONFIG_EXTRA_ENV_SETTINGS -#endif - "\0" -}; +#include struct hsearch_data env_htab = { - .apply = env_check_apply, + .change_ok = env_flags_validate, }; -static uchar __env_get_char_spec(int index) +__weak uchar env_get_char_spec(int index) { return *((uchar *)(gd->env_addr + index)); } -uchar env_get_char_spec(int) - __attribute__((weak, alias("__env_get_char_spec"))); static uchar env_get_char_init(int index) { @@ -176,13 +63,42 @@ const uchar *env_get_addr(int index) return &default_environment[index]; } +/* + * Read an environment variable as a boolean + * Return -1 if variable does not exist (default to true) + */ +int getenv_yesno(const char *var) +{ + char *s = getenv(var); + + if (s == NULL) + return -1; + return (*s == '1' || *s == 'y' || *s == 'Y' || *s == 't' || *s == 'T') ? + 1 : 0; +} + +/* + * Look up the variable from the default environment + */ +char *getenv_default(const char *name) +{ + char *ret_val; + unsigned long really_valid = gd->env_valid; + unsigned long real_gd_flags = gd->flags; + + /* Pretend that the image is bad. */ + gd->flags &= ~GD_FLG_ENV_READY; + gd->env_valid = 0; + ret_val = getenv(name); + gd->env_valid = really_valid; + gd->flags = real_gd_flags; + return ret_val; +} + void set_default_env(const char *s) { - /* - * By default, do not apply changes as they will eventually - * be applied by someone else - */ - int do_apply = 0; + int flags = 0; + if (sizeof(default_environment) > ENV_SIZE) { puts("*** Error - default environment is too large\n\n"); return; @@ -194,14 +110,7 @@ void set_default_env(const char *s) "using default environment\n\n", s + 1); } else { - /* - * This set_to_default was explicitly asked for - * by the user, as opposed to being a recovery - * mechanism. Therefore we check every single - * variable and apply changes to the system - * right away (e.g. baudrate, console). - */ - do_apply = 1; + flags = H_INTERACTIVE; puts(s); } } else { @@ -209,8 +118,8 @@ void set_default_env(const char *s) } if (himport_r(&env_htab, (char *)default_environment, - sizeof(default_environment), '\0', 0, - 0, NULL, do_apply) == 0) + sizeof(default_environment), '\0', flags, 0, + 0, NULL) == 0) error("Environment import failed: errno = %d\n", errno); gd->flags |= GD_FLG_ENV_READY; @@ -225,11 +134,56 @@ int set_default_vars(int nvars, char * const vars[]) * (and use \0 as a separator) */ return himport_r(&env_htab, (const char *)default_environment, - sizeof(default_environment), '\0', H_NOCLEAR, - nvars, vars, 1 /* do_apply */); + sizeof(default_environment), '\0', + H_NOCLEAR | H_INTERACTIVE, 0, nvars, vars); +} + +#ifdef CONFIG_ENV_AES +#include +/** + * env_aes_cbc_get_key() - Get AES-128-CBC key for the environment + * + * This function shall return 16-byte array containing AES-128 key used + * to encrypt and decrypt the environment. This function must be overriden + * by the implementer as otherwise the environment encryption will not + * work. + */ +__weak uint8_t *env_aes_cbc_get_key(void) +{ + return NULL; +} + +static int env_aes_cbc_crypt(env_t *env, const int enc) +{ + unsigned char *data = env->data; + uint8_t *key; + uint8_t key_exp[AES_EXPAND_KEY_LENGTH]; + uint32_t aes_blocks; + + key = env_aes_cbc_get_key(); + if (!key) + return -EINVAL; + + /* First we expand the key. */ + aes_expand_key(key, key_exp); + + /* Calculate the number of AES blocks to encrypt. */ + aes_blocks = ENV_SIZE / AES_KEY_LENGTH; + + if (enc) + aes_cbc_encrypt_blocks(key_exp, data, data, aes_blocks); + else + aes_cbc_decrypt_blocks(key_exp, data, data, aes_blocks); + + return 0; +} +#else +static inline int env_aes_cbc_crypt(env_t *env, const int enc) +{ + return 0; } +#endif -#ifndef CONFIG_SPL_BUILD /* * Check if CRC is valid and (if yes) import the environment. * Note that "buf" may or may not be aligned. @@ -237,6 +191,7 @@ int set_default_vars(int nvars, char * const vars[]) int env_import(const char *buf, int check) { env_t *ep = (env_t *)buf; + int ret; if (check) { uint32_t crc; @@ -249,8 +204,16 @@ int env_import(const char *buf, int check) } } - if (himport_r(&env_htab, (char *)ep->data, ENV_SIZE, '\0', 0, - 0, NULL, 0 /* do_apply */)) { + /* Decrypt the env if desired. */ + ret = env_aes_cbc_crypt(ep, 0); + if (ret) { + error("Failed to decrypt env!\n"); + set_default_env("!import failed"); + return ret; + } + + if (himport_r(&env_htab, (char *)ep->data, ENV_SIZE, '\0', 0, 0, + 0, NULL)) { gd->flags |= GD_FLG_ENV_READY; return 1; } @@ -261,12 +224,36 @@ int env_import(const char *buf, int check) return 0; } -#endif + +/* Emport the environment and generate CRC for it. */ +int env_export(env_t *env_out) +{ + char *res; + ssize_t len; + int ret; + + res = (char *)env_out->data; + len = hexport_r(&env_htab, '\0', 0, &res, ENV_SIZE, 0, NULL); + if (len < 0) { + error("Cannot export environment: errno = %d\n", errno); + return 1; + } + + /* Encrypt the env if desired. */ + ret = env_aes_cbc_crypt(env_out, 1); + if (ret) + return ret; + + env_out->crc = crc32(0, env_out->data, ENV_SIZE); + + return 0; +} void env_relocate(void) { #if defined(CONFIG_NEEDS_MANUAL_RELOC) env_reloc(); + env_htab.change_ok += gd->reloc_off; #endif if (gd->env_valid == 0) { #if defined(CONFIG_ENV_IS_NOWHERE) || defined(CONFIG_SPL_BUILD)