Hi, is there a way to get the PBKDF settings (struct crypt_pbkdf_type) of an existing key slot in a LUKS2 volume via the libcryptsetup API? This question is related to the default PBKDF algorithm Argon2i for LUKS2 and the out-of-memory errors that you might get when you unlock multiple LUKS2 volumes during system startup via /etc/crypttab. One of my application uses crypt_keyslot_add_by_key() to add a new unbound key slot. Unfortunately this new key slot gets the default PBKDF settings, thus it gets Argon2i. I guess if I would use crypt_set_pbkdf_type() before to set PBKDF2, then the new key slot would get PBKDF2 instead of Argon2i. However, I don't want to hard code PBKDF2 here, but I would like to use the PBKDF settings of the key slot that was unlocked before. So I would need a way to get the PBKDF settings of a key slot and then use crypt_set_pbkdf_type() with those settings before calling crypt_keyslot_add_by_key(). That way the new key slot would get the same PBKDF settings as the current one. Using crypt_get_pbkdf_type() seems to return the default PBKDF algorithm, thus Argon2i for LUKS2. Kind regards, Ingo -- Ingo Franzki eMail: ifranzki@xxxxxxxxxxxxx Tel: ++49 (0)7031-16-4648 Fax: ++49 (0)7031-16-3456 Linux on IBM Z Development, Schoenaicher Str. 220, 71032 Boeblingen, Germany IBM Deutschland Research & Development GmbH / Vorsitzender des Aufsichtsrats: Matthias Hartmann Geschäftsführung: Dirk Wittkopp Sitz der Gesellschaft: Böblingen / Registergericht: Amtsgericht Stuttgart, HRB 243294 IBM DATA Privacy Statement: https://www.ibm.com/privacy/us/en/ _______________________________________________ dm-crypt mailing list dm-crypt@xxxxxxxx https://www.saout.de/mailman/listinfo/dm-crypt
