Add the command verify that check the signature of
an image with the pre-load header. If the check
succeed, the u-boot env variable 'loadaddr_verified'
is set to the address of the image (without the header).
It allows to run such commands:
tftp script.img && verify $loadaddr && source $loadaddr_verified
Signed-off-by: Philippe Reynes <philippe.rey...@softathome.com>
---
cmd/Kconfig | 7 +++++++
cmd/Makefile | 1 +
cmd/verify.c | 53 ++++++++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 61 insertions(+)
create mode 100644 cmd/verify.c
diff --git a/cmd/Kconfig b/cmd/Kconfig
index 87aa3fb11a..0460d5c3a0 100644
--- a/cmd/Kconfig
+++ b/cmd/Kconfig
@@ -428,6 +428,13 @@ config CMD_THOR_DOWNLOAD
There is no documentation about this within the U-Boot source code
but you should be able to find something on the interwebs.
+config CMD_VERIFY
+ bool "verify the global signature"
+ depends on CMD_BOOTM_PRE_LOAD
+ help
+ Verify the signature provided in a pre-load header of
+ a full image.
+
config CMD_ZBOOT
bool "zboot - x86 boot command"
help
diff --git a/cmd/Makefile b/cmd/Makefile
index 166c652d98..80e054e806 100644
--- a/cmd/Makefile
+++ b/cmd/Makefile
@@ -177,6 +177,7 @@ obj-$(CONFIG_CMD_THOR_DOWNLOAD) += thordown.o
obj-$(CONFIG_CMD_XIMG) += ximg.o
obj-$(CONFIG_CMD_YAFFS2) += yaffs2.o
obj-$(CONFIG_CMD_SPL) += spl.o
+obj-$(CONFIG_CMD_VERIFY) += verify.o
obj-$(CONFIG_CMD_W1) += w1.o
obj-$(CONFIG_CMD_ZIP) += zip.o
obj-$(CONFIG_CMD_ZFS) += zfs.o
diff --git a/cmd/verify.c b/cmd/verify.c
new file mode 100644
index 0000000000..4d055e0790
--- /dev/null
+++ b/cmd/verify.c
@@ -0,0 +1,53 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2022 Philippe Reynes <philippe.rey...@softathome.com>
+ */
+
+#include <common.h>
+#include <env.h>
+#include <image.h>
+#include <mapmem.h>
+
+static ulong verify_get_addr(int argc, char *const argv[])
+{
+ ulong addr;
+
+ if (argc > 0)
+ addr = simple_strtoul(argv[0], NULL, 16);
+ else
+ addr = image_load_addr;
+
+ return addr;
+}
+
+static int do_verify(struct cmd_tbl *cmdtp, int flag, int argc,
+ char *const argv[])
+{
+ ulong addr = verify_get_addr(argc, argv);
+ int ret = 0;
+
+ argc--; argv++;
+
+ addr = verify_get_addr(argc, argv);
+
+ if (CONFIG_IS_ENABLED(CMD_BOOTM_PRE_LOAD)) {
+ ret = image_pre_load(addr);
+
+ if (ret) {
+ ret = CMD_RET_FAILURE;
+ goto out;
+ }
+
+ env_set_hex("loadaddr_verified", addr + image_load_offset);
+ }
+
+ out:
+ return ret;
+}
+
+U_BOOT_CMD(verify, 2, 1, do_verify,
+ "verify the global signature provided in the pre-load header,\n"
+ "\tif the check succeed, the u-boot env variable loadaddr_verified\n"
+ "\tis set to the address of the image (without the header)",
+ "<image addr>"
+);
--
2.17.1
