Add optional salt to AUTOBOOT_STOP_STR_SHA256
Adds an optional SALT value to AUTOBOOT_STOP_STR_SHA256. If a string
followed by a ":" is prepended to the sha256, the portion to the left
of the colon will be used as a salt and the password will be appended
to the salt before the sha256 is computed and compared.
Signed-off-by: Joel Peshkin <joel.peshkin@broadcom.com>
Cc: Simon Glass <sjg@chromium.org>
Cc: Bin Meng <bmeng.cn@gmail.com>
Cc: Patrick Delaunay <patrick.delaunay@st.com>
Cc: Heiko Schocher <hs@denx.de>
Cc: Heinrich Schuchardt <xypron.glpk@gmx.de>
Cc: Joel Peshkin <joel.peshkin@broadcom.com>
To: u-boot@lists.denx.de
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Heiko Schocher <hs@denx.de>
diff --git a/common/autoboot.c b/common/autoboot.c
index e628baf..ddb6246 100644
--- a/common/autoboot.c
+++ b/common/autoboot.c
@@ -25,7 +25,7 @@
DECLARE_GLOBAL_DATA_PTR;
-#define MAX_DELAY_STOP_STR 32
+#define MAX_DELAY_STOP_STR 64
#ifndef DEBUG_BOOTKEYS
#define DEBUG_BOOTKEYS 0
@@ -80,6 +80,7 @@
u8 sha_env[SHA256_SUM_LEN];
u8 *sha;
char *presskey;
+ char *c;
const char *algo_name = "sha256";
u_int presskey_len = 0;
int abort = 0;
@@ -89,6 +90,14 @@
if (sha_env_str == NULL)
sha_env_str = AUTOBOOT_STOP_STR_SHA256;
+ presskey = malloc_cache_aligned(MAX_DELAY_STOP_STR);
+ c = strstr(sha_env_str, ":");
+ if (c && (c - sha_env_str < MAX_DELAY_STOP_STR)) {
+ /* preload presskey with salt */
+ memcpy(presskey, sha_env_str, c - sha_env_str);
+ presskey_len = c - sha_env_str;
+ sha_env_str = c + 1;
+ }
/*
* Generate the binary value from the environment hash value
* so that we can compare this value with the computed hash
@@ -100,7 +109,6 @@
return 0;
}
- presskey = malloc_cache_aligned(MAX_DELAY_STOP_STR);
sha = malloc_cache_aligned(SHA256_SUM_LEN);
size = SHA256_SUM_LEN;
/*