[ptxdist] [PATCH v2 4/7] templates/barebox-imx-habv4: use the 'imx-habv4-srk' role group

[Roland Hieber <rhi@pengutronix.de>]

From: Marc Kleine-Budde <mkl@pengutronix.de>

The previous patch taught new code signing providers to set up the
'imx-habv4-srk' role group. This patch uses it for the barebox-imx-habv4
recipe.

Keep backwards compatibility with the old way of using indexed role
names in the library part, so existing recipes can still work with
ptxd_make_imx_habv4_gen_table() if their code signing provider sets up
the roles appropriately.

Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Roland Hieber <rhi@pengutronix.de>
---
PATCH v2 (rhi):
 - split up code signing provider template changes (see previous patch)
   from lib and consumer changes
 - fix ptxd_make_imx_habv4_gen_table() documentation comments

PATCH v1 (mkl): https://lore.ptxdist.org/ptxdist/20210412161900.2376802-2-mkl@pengutronix.de
---
 .../templates/template-barebox-imx-habv4-make |  2 +-
 scripts/lib/ptxd_lib_imx_hab.sh               | 49 ++++++++++++++-----
 2 files changed, 37 insertions(+), 14 deletions(-)

diff --git a/rules/templates/template-barebox-imx-habv4-make b/rules/templates/template-barebox-imx-habv4-make
index eb752c8349d9..cc825dc90292 100644
--- a/rules/templates/template-barebox-imx-habv4-make
+++ b/rules/templates/template-barebox-imx-habv4-make
@@ -74,7 +74,7 @@ $(STATEDIR)/barebox-@package@.compile:
 	@$(call targetinfo)
 
 	@$(call world/env, BAREBOX_@PACKAGE@) \
-		ptxd_make_imx_habv4_gen_table "imx-habv4-srk%d" 4
+		ptxd_make_imx_habv4_gen_table imx-habv4-srk
 
 	@$(call world/compile, BAREBOX_@PACKAGE@)
 
diff --git a/scripts/lib/ptxd_lib_imx_hab.sh b/scripts/lib/ptxd_lib_imx_hab.sh
index d1e2aba99fab..fa5b3e2c1439 100644
--- a/scripts/lib/ptxd_lib_imx_hab.sh
+++ b/scripts/lib/ptxd_lib_imx_hab.sh
@@ -9,12 +9,14 @@
 #
 # ptxd_make_imx_habv4_gen_table - generate the srk fuse file and srk table for i.MX HABv4
 #
-# usage: ptxd_make_imx_habv4_gen_table <template> [<srk_count>]
+# usage: ptxd_make_imx_habv4_gen_table <role group>
+#        ptxd_make_imx_habv4_gen_table <template> [<srk_count>]
 #
+# role group: the group that specifies all roles to access the keys
 # template: the role template to access the keys. Must contain a "%d" which is
 #           used as index
-# srk_count: the number of keys (keys with index 1..srk_count will be used),
-#            defaults to 4
+# srk_count: only when using <template>: the number of keys (keys with index
+#           1..srk_count will be used), defaults to 4
 #
 # The output files are generated in the package build dir:
 #
@@ -25,25 +27,46 @@
 #     This will contain the srk hash which must be written to the fuses
 #
 ptxd_make_imx_habv4_gen_table_impl() {
+    local group="${1}"
     local template="${1}"
     local srk_count="${2}"
     local table_bin="${pkg_build_dir}/imx-srk-table.bin"
     local srk_fuse_bin="${pkg_build_dir}/imx-srk-fuse.bin"
     local -a certs
+    local i
 
-    if [ -z "${srk_count}" ]; then
-	srk_count=4
-    fi
+    case "${template}" in
+	*%d*)	# <template> [<srk_count>]
+	    if [ -z "${srk_count}" ]; then
+		srk_count=4
+	    fi
 
-    if [ "${srk_count}" -gt 4 ]; then
-	ptxd_bailout "HABv4 allows only 4 certificates"
-    fi
+	    if [ "${srk_count}" -gt 4 ]; then
+		ptxd_bailout "HABv4 allows only 4 certificates"
+	    fi
 
-    echo -e "generating $(basename ${table_bin}) and $(basename ${srk_fuse_bin})\n"
+	    for i in $(seq ${srk_count}); do
+		certs[${#certs[*]}]="$(cs_get_ca "$(printf "${template}" ${i})")"
+	    done
+	    ;;
+
+	*)	# <role group>
+	    local -a roles=( $(cs_group_get_roles "${group}") )
+
+	    if [ "${#roles[@]}" -eq 0 ]; then
+		ptxd_bailout "Failed to get roles for group '${group}'"
+	    fi
 
-    for i in $(seq ${srk_count}); do
-	certs[${#certs[*]}]="$(cs_get_ca "$(printf "${template}" ${i})")"
-    done
+	    if [ "${#roles[@]}" -gt 4 ]; then
+		ptxd_bailout "HABv4 allows only 4 certificates"
+	    fi
+
+	    for i in "${roles[@]}"; do
+		certs[${#certs[*]}]="$(cs_get_ca "${i}")"
+	    done
+    esac
+
+    echo -e "generating $(basename ${table_bin}) and $(basename ${srk_fuse_bin})\n"
 
     local orig_IFS="${IFS}"
     IFS=","
-- 
2.30.2


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