Hi,
In February I already tagged some authenc ciphers for FIPS compatibility.
I currently revisit this to get testmgr running all the tests in strict FIPS
mode.
The authenc() class is troublesome.
There is a HASH + ENC part of this method, but you can also add associated data,
which is not encrypted. (using the ctx->null cipher in crypto/authenc.c)
But in FIPS mode the crypto_authenc_init_tfm does:
null = crypto_get_default_null_skcipher();
which results in error, as the crypto_alloc_blkcipher("ecb(cipher_null)", 0, 0);
results in failure due to "ecb(cipher_null)" not FIPS compliant.
How to handle this?
I think GCM also does not encrypt, just hashes, the associated data, it just
does
copy the content itself and does not use a virtual cipher.
Ciao, Marcus
