tpm2_parse_pcr_argument_to_mask() is supposed to parse a PCR mask string, and uses the full blown tpm2_parse_pcr_argument() call at its core, which parses more than just a mask, i.e. values and algorithms too. Which is very confusing at times, because commands such as "systemd-cryptenroll --tpm2-device=auto --tpm2-public-key-pcrs=1:sha1=09dbdbc7f6cdd8029cc90b57a915c19a0ac21bce" are very confusing, since they suggest enrollment with a specific algorithm and has value, but this is not in fact what happens: both are entirely ignored. That this was accepted this way was more an accident than intended, which is already visible in the fact that extensive test case entirely ignores the fact that strings like this are accepted.
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