Hi,
On switching to Linux 6.16-rc1 for my SPAcc driver testing. I see
below failures in CMAC(SM4) & XCBC(SM4).
alg: hash: failed to allocate transform for spacc-xcbc(sm4): -22
alg: hash: failed to allocate transform for spacc-cmac(sm4): -22
alg: self-tests for xcbc(sm4) using spacc-xcbc(sm4) failed (rc=-22)
alg: self-tests for cmac(sm4) using spacc-cmac(sm4) failed (rc=-22)
On cat /proc/crypto, I dont see the CMAC(SM4-generic) &
XCBC(SM4-generic) ciphers listed in spite of me enabling SM4 support
in the kernel config. Am I missing something?
To test, I found a work around by doing a dummy transform alloc (&
freeing it) for CMAC(SM4)/XCBC(SM4) using
struct crypto_ahash *tfm = crypto_alloc_ahash("cmac(sm4)", 0, 0);
The above call registers cmac(sm4-generic) & xcbc(sm4-generic), which
gets things working for the SM4 ciphers on hardware. That happens
because the generic ciphers get registered after dummy transform
alloc.
Appreciate some help on this.
Warm regards,
PK
