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tpm2-util: dont't find best PCR bank if no PCRs are selected whatsoever

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This will otherwise just yield weird log message, complaining that PCRs
were not initialized. But which PCRs if we have none selected?
This commit is contained in:
Lennart Poettering
2023-10-24 22:19:48 +02:00
parent adabcbabff
commit 3ee5e9d5f3
1 changed files with 6 additions and 0 deletions
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6
src/shared/tpm2-util.c
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@@ -2539,6 +2539,12 @@ int tpm2_get_best_pcr_bank(
assert(c);
assert(ret);
if (pcr_mask == 0) {
log_debug("Asked to pick best PCR bank but no PCRs selected we could derive this from. Defaulting to SHA256.");
*ret = TPM2_ALG_SHA256; /* if no PCRs are selected this doesn't matter anyway... */
return 0;
}
FOREACH_TPMS_PCR_SELECTION_IN_TPML_PCR_SELECTION(selection, &c->capability_pcrs) {
TPMI_ALG_HASH hash = selection->hash;
int good;