Is OpenSSL AES-NI not available in pgcrypto?

[aghart...@gmail.com]

Hi all,

A question, may I wrong.

I've a Rocky Linux 8 with OpenSSL 1.1.1 FIPS  and Intel cpu with aes 
support (cat /proc/cpuinfo | grep aes)


Test made with openssl gives me a huge performance with aes enabled vs not:

"openssl speed -elapsed -evp aes-128-cbc" is about 5 time faster than 
"openssl speed -elapsed aes-128-cbc" or another "software calculated 
test", eg. "openssl speed -elapsed bf-cbc"


So OpenSSL is ok.

Postgresql 15 is compiled with openssl:

select name, setting from pg_settings where name = 'ssl_library';
    name | setting
-+-
 ssl_library | OpenSSL
(1 row)

So, a test with pgcrypto:

select pgp_sym_encrypt(data::text, 'pwd') --default to aes128
from generate_series('2022-01-01'::timestamp, '2022-12-31'::timestamp, 
'1 hour'::interval) data


vs

select pgp_sym_encrypt(data::text, 'pwd','cipher-algo=bf') -- blowfish
from generate_series('2022-01-01'::timestamp, '2022-12-31'::timestamp, 
'1 hour'::interval) data


In my test both queries execution is similaraes-128 was expected 
about  5 time faster.


So, why?

Pgcrypto use OpenSSL as backend, so, does it explicit force software aes 
calculation instead of AES-NI cpu ones?


Thanksfor support.

Best regards,

Agharta

Re: Is OpenSSL AES-NI not available in pgcrypto?

[aghart...@gmail.com]

Hi,

I see, I was hoping that wasn't the case.

Thanks a lot for your support.

My best regards,

Agharta


Il 03/01/23 16:54, Peter Eisentraut ha scritto:

On 02.01.23 17:57, aghart...@gmail.com wrote:

select pgp_sym_encrypt(data::text, 'pwd') --default to aes128
from generate_series('2022-01-01'::timestamp, 
'2022-12-31'::timestamp, '1 hour'::interval) data


vs

select pgp_sym_encrypt(data::text, 'pwd','cipher-algo=bf') -- blowfish
from generate_series('2022-01-01'::timestamp, 
'2022-12-31'::timestamp, '1 hour'::interval) data


In my test both queries execution is similaraes-128 was expected 
about  5 time faster.


So, why?

Pgcrypto use OpenSSL as backend, so, does it explicit force software 
aes calculation instead of AES-NI cpu ones?


I suspect it is actually using AES hardware support, but all the other 
overhead of pgcrypto makes the difference not noticeable.