[PATCH ima-evm-utils] boot_aggregate.test: Skip if CONFIG_IMA not enabled

[Petr Vorel <petr.vorel@gmail.com>]

This is required, because when TPM HW available (i.e. -c /dev/tpm0),
evmctl ima_boot_aggregate returns sha1:xxxx.

skip requires to move cleanup().

Signed-off-by: Petr Vorel <petr.vorel@gmail.com>
---
Hi Mimi,

this Fixes problems on current Debian, which has still disabled CONFIG_IMA
(FYI [1]). I was not able to figure out how to get it working with
sample-* files, but maybe there is a way.

Although it sound strange, people may want to build and check evmctl
even on a system with disabled CONFIG_IMA (both Debian and Ubuntu have
outdated ima-evm-utils (1.1)).

Kind regards,
Petr

[1] https://bugs.debian.org/972459 linux: Reenable CONFIG_IMA

 tests/boot_aggregate.test | 35 ++++++++++++++++++++---------------
 1 file changed, 20 insertions(+), 15 deletions(-)

diff --git a/tests/boot_aggregate.test b/tests/boot_aggregate.test
index 42ed7b4..5fd4204 100755
--- a/tests/boot_aggregate.test
+++ b/tests/boot_aggregate.test
@@ -26,21 +26,6 @@ TSSDIR="$(dirname -- "$(which tssstartup)")"
 PCRFILE="/sys/class/tpm/tpm0/device/pcrs"
 MISC_PCRFILE="/sys/class/misc/tpm0/device/pcrs"
 
-if [ "$(id -u)" = 0 ] && [ -c "/dev/tpm0" ]; then
-	ASCII_RUNTIME_MEASUREMENTS="/sys/kernel/security/ima/ascii_runtime_measurements"
-else
-	BINARY_BIOS_MEASUREMENTS="./sample-binary_bios_measurements-pcrs-8-9"
-	ASCII_RUNTIME_MEASUREMENTS="./sample-ascii_runtime_measurements-pcrs-8-9"
-	export TPM_INTERFACE_TYPE="socsim"
-	export TPM_COMMAND_PORT=2321
-	export TPM_PLATFORM_PORT=2322
-	export TPM_SERVER_NAME="localhost"
-
-	# swtpm uses the raw, unencapsulated packet format
-	export TPM_SERVER_TYPE="raw"
-
-fi
-
 # Only stop this test's software TPM
 cleanup() {
 	if [ -n "${SWTPM_PID}" ]; then
@@ -165,6 +150,26 @@ check() {
 	return "$FAIL"
 }
 
+if [ ! -d "/sys/kernel/security/ima" ]; then
+	echo "${CYAN}SKIP: CONFIG_IMA not enabled${NORM}"
+	exit "$SKIP"
+fi
+
+if [ "$(id -u)" = 0 ] && [ -c "/dev/tpm0" ]; then
+	ASCII_RUNTIME_MEASUREMENTS="/sys/kernel/security/ima/ascii_runtime_measurements"
+else
+	BINARY_BIOS_MEASUREMENTS="./sample-binary_bios_measurements-pcrs-8-9"
+	ASCII_RUNTIME_MEASUREMENTS="./sample-ascii_runtime_measurements-pcrs-8-9"
+	export TPM_INTERFACE_TYPE="socsim"
+	export TPM_COMMAND_PORT=2321
+	export TPM_PLATFORM_PORT=2322
+	export TPM_SERVER_NAME="localhost"
+
+	# swtpm uses the raw, unencapsulated packet format
+	export TPM_SERVER_TYPE="raw"
+
+fi
+
 # Start and initialize a software TPM as needed
 if [ "$(id -u)" != 0 ] || [ ! -c "/dev/tpm0" ]; then
 	if [ -f "$PCRFILE" ] || [ -f "$MISC_PCRFILE" ]; then
-- 
2.27.0.rc0