Userspace crypto interface not available (algif_skcipher)

sirrosh

Hi,

cryptsetup is unusable because of lack of userspace cipher interface modules (algif_*).
Kernel cipher support is sufficient:

phablet@ubuntu-phablet:~$ grep name.*aes /proc/crypto|cut -d : -f 2
 cmac(aes)
 ecb(aes)
 cbc(aes)
 aes
 xts(aes)
 ctr(aes)
 cbc(aes)
 ecb(aes)
 __xts-aes-ce
 __ctr-aes-ce
 __cbc-aes-ce
 __ecb-aes-ce
 aes

but any operation fails with the same reason: "Userspace crypto wrapper cannot use cipher_name"

# Userspace crypto wrapper cannot use aes-xts-plain64 (-95).

Even the benchmarking fails:

phablet@ubuntu-phablet:~$ cryptsetup benchmark
# Tests are approximate using memory only (no storage IO).
PBKDF2-sha1       297890 iterations per second
PBKDF2-sha256     185129 iterations per second
PBKDF2-sha512     168907 iterations per second
PBKDF2-ripemd160  263196 iterations per second
PBKDF2-whirlpool   61134 iterations per second
Required kernel crypto interface not available.
Ensure you have algif_skcipher kernel module loaded.

Suggesting some specific Volla kernel config nuances...

sirrosh

There's an interesting discussion on the Volla's github about deliberately disabled kernel crypto interface in Volla kernel.

I don't quite understand the reason why theese people advertize their commercial product as a (not literally) privacy and security enhanced and then turning off the crypto support in their custom built kernel.

Did I miss something?

Please feel free to join the discussion and/or share this information on other social platforms to get more audience involved.