pefs: Check of possible max file size and file name length int overflows.
pefs: Change pefs_hkdf_expand idx argument type to uint8_t.
pefs: Perform GF multiplication in constant time.
pefs: Deprecate pefs randomchain command in documentation.
pefs: Copy HMAC-SHA2 and PBKDF2-HMAC-SHA512 from geli to sys/crypto.
pefs: Switch to sys/crypto/ hmac and pbkdf2 implementations.
pefs: Import crypto_verify_bytes() by Colin Percival.
pefs: Compare sensitive data in constant time.