import-creds: add support for binary credentials specified on the kernel cmdline

test/TEST-54-CREDS/test.sh

@@ -25,6 +25,7 @@ KERNEL_CREDS=(
     "systemd.set_credential=sysctl.extra:kernel.domainname=sysctltest"
     "systemd.set_credential=login.motd:hello"
     "systemd.set_credential=login.issue:welcome"
+    "systemd.set_credential_binary=waldi:d29vb29mZmZ3dWZmZnd1ZmYK"
     "rd.systemd.import_credentials=no"
 )
 KERNEL_APPEND="${KERNEL_APPEND:-} ${KERNEL_CREDS[*]}"

test/units/testsuite-54.sh

@@ -176,6 +176,7 @@ if systemd-detect-virt -q -c ; then
 elif [ -d /sys/firmware/qemu_fw_cfg/by_name ]; then
     # Verify that passing creds through kernel cmdline works
     [ "$(systemd-creds --system cat kernelcmdlinecred)" = "uff" ]
+    [ "$(systemd-creds --system cat waldi)" = "woooofffwufffwuff" ]
 
     # And that it also works via SMBIOS
     [ "$(systemd-creds --system cat smbioscredential)" = "magicdata" ]