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ima-evm-utils: treat unallocated banks as an error

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The TPM spec differentiates between an unknown bank and an unallocated
bank.  In terms of re-calculating the PCR, treat them as equivalent.

Signed-off-by: Mimi Zohar <zohar@linux.ibm.com>
This commit is contained in:
Mimi Zohar 2020-02-18 17:31:59 -05:00
parent 9c2298c367
commit dc3897f011
1 changed files with 5 additions and 0 deletions
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src/evmctl.c
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@ -1449,6 +1449,11 @@ static int tpm2_pcr_read(int idx, uint8_t *hwpcr, int len, char **errmsg)
/* get the popen "cmd" return code */
ret = pclose(fp);
/* Treat an unallocated bank as an error */
if (!ret && (strlen(pcr) < SHA_DIGEST_LENGTH))
ret = -1;
if (!ret)
hex2bin(hwpcr, pcr, SHA_DIGEST_LENGTH);
else