The Implementation Guidance for FIPS 140-3 says in section D.N
"Password-Based Key Derivation for Storage Applications" that "the
vendor shall document in the module’s Security Policy the length of
a password/passphrase used in key derivation and establish an upper
bound for the probability of having this parameter guessed at random.
This probability shall take into account not only the length of the
password/passphrase, but also the difficulty of guessing it. The
decision on the minimum length of a password used for key derivation is
the vendor’s, but the vendor shall at a minimum informally justify the
decision."
We are choosing a minimum password length of 8 bytes, because NIST's
ACVP testing uses passwords as short as 8 bytes, and requiring longer
passwords combined with an implicit indicator (i.e., returning an error)
would cause the module to fail ACVP testing.
Signed-off-by: Clemens Lang <cllang@redhat.com>
Resolves: rhbz#2144003
