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ima-evm-utils: check the return code from tpm_pcr_read() in ima_measurement()

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Don't log garbage when neither /sys/class/tpm/tpm0/device/pcrs nor
/sys/class/misc/tpm0/device/pcrs can be read and exit nicely with a
value of 1.

Signed-off-by: George Wilson <gcwilson@linux.ibm.com>
Signed-off-by: Mimi Zohar <zohar@linux.vnet.ibm.com>
This commit is contained in:
George Wilson
2018-06-26 10:27:18 -06:00
committed by Mimi Zohar
parent 9119f771a2
commit 8c8f29e870
1 changed files with 2 additions and 1 deletions
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3
src/evmctl.c
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@ -1535,7 +1535,8 @@ static int ima_measurement(const char *file)
log_info("PCRAgg %.2d: ", i);
log_dump(pcr[i], SHA_DIGEST_LENGTH);
tpm_pcr_read(i, hwpcr, sizeof(hwpcr));
if (tpm_pcr_read(i, hwpcr, sizeof(hwpcr)))
exit(1);
log_info("HW PCR-%d: ", i);
log_dump(hwpcr, sizeof(hwpcr));