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 $loadaddr_verified
Signed-off-by: Philippe Reynes philippe.reynes@softathome.com --- cmd/Kconfig | 7 +++++++ cmd/Makefile | 1 + cmd/verify.c | 53 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 61 insertions(+) create mode 100644 cmd/verify.c
diff --git a/cmd/Kconfig b/cmd/Kconfig index 87aa3fb11a..0460d5c3a0 100644 --- a/cmd/Kconfig +++ b/cmd/Kconfig @@ -428,6 +428,13 @@ config CMD_THOR_DOWNLOAD There is no documentation about this within the U-Boot source code but you should be able to find something on the interwebs.
+config CMD_VERIFY + bool "verify the global signature" + depends on CMD_BOOTM_PRE_LOAD + help + Verify the signature provided in a pre-load header of + a full image. + config CMD_ZBOOT bool "zboot - x86 boot command" help diff --git a/cmd/Makefile b/cmd/Makefile index 166c652d98..80e054e806 100644 --- a/cmd/Makefile +++ b/cmd/Makefile @@ -177,6 +177,7 @@ obj-$(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.reynes@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>" +);