[U-Boot] [PATCH 2/7] fdt: add "fdt sign" command

[Heiko Schocher]

check if a fdt is correct signed
pass an optional addr value. Contains the addr of the key blob

Signed-off-by: Heiko Schocher <hs at denx.de>
Cc: Simon Glass <sjg at chromium.org>
---
 common/cmd_fdt.c | 38 +++++++++++++++++++++++++++++++++++++-
 1 file changed, 37 insertions(+), 1 deletion(-)

diff --git a/common/cmd_fdt.c b/common/cmd_fdt.c
index 3a9edd6..b8468ea 100644
--- a/common/cmd_fdt.c
+++ b/common/cmd_fdt.c
@@ -243,7 +243,7 @@ static int do_fdt(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 	/*
 	 * Set the value of a property in the working_fdt.
 	 */
-	} else if (argv[1][0] == 's') {
+	} else if (strncmp(argv[1], "se", 2) == 0) {
 		char *pathp;		/* path */
 		char *prop;		/* property */
 		int  nodeoffset;	/* node offset from libfdt */
@@ -283,6 +283,37 @@ static int do_fdt(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 			return 1;
 		}
 
+#if defined(CONFIG_FIT_SIGNATURE)
+	} else if (strncmp(argv[1], "si", 2) == 0) {
+		int cfg_noffset;
+		int ret;
+		unsigned long addr;
+		struct fdt_header *blob;
+
+		if (!working_fdt)
+			return CMD_RET_FAILURE;
+
+		if (argc > 2) {
+			addr = simple_strtoul(argv[2], NULL, 16);
+			blob = map_sysmem(addr, 0);
+		} else {
+			blob = (struct fdt_header *)gd->fdt_blob;
+		}
+		if (!fdt_valid(&blob))
+			return 1;
+
+		gd->fdt_blob = blob;
+		cfg_noffset = fit_conf_get_node(working_fdt, NULL);
+		if (!cfg_noffset)
+			return CMD_RET_FAILURE;
+
+		ret = fit_config_verify(working_fdt, cfg_noffset);
+		if (ret == 1)
+			return CMD_RET_SUCCESS;
+		else
+			return CMD_RET_FAILURE;
+#endif
+
 	/********************************************************************
 	 * Get the value of a property in the working_fdt.
 	 ********************************************************************/
@@ -992,6 +1023,11 @@ static char fdt_help_text[] =
 	"fdt rsvmem delete <index>           - Delete a mem reserves\n"
 	"fdt chosen [<start> <end>]          - Add/update the /chosen branch in the tree\n"
 	"                                        <start>/<end> - initrd start/end addr\n"
+#if defined(CONFIG_FIT_SIGNATURE)
+	"fdt sign [<addr>]                   - check FIT signature\n"
+	"                                        <start> - addr of key blob\n"
+	"                                                  default gd->fdt_blob\n"
+#endif
 	"NOTE: Dereference aliases by omiting the leading '/', "
 		"e.g. fdt print ethernet0.";
 #endif
-- 
1.8.3.1