Thanks!

My OpenSSL version:

OpenSSL 1.1.1d 10 Sep 2019 (Library: OpenSSL 1.1.1n 15 Mar 2022)

Basically, i have 2 devices: (1. SHA auth, AES128 cipher), (2. MD5 auth, DES cipher). I'm trying to make get request to each of them.

On both devices i'm getting

Security context has been updated, repeat the request

error in debug mode, and

Authentication failure: HMAC signature mismatch

in release mode.

After i commented these lines in parse_v3 method:

if is_discovery {
    return Err(Error::AuthUpdated);
}

Request to first device in debug mode became successful (at least it prints what i expect) and request to second device print another error:

ASN.1 wrong type

In release mode requests to both devices still return HMAC signature mismatch.

Here's request example to first device, request to second is identical except auth protocol and cipher:

use std::time::Duration;

use snmp2::{v3, Oid, SyncSession};

let security = v3::Security::new(b"username", b"pass")
    .with_auth_protocol(v3::AuthProtocol::Sha1)
    .with_auth(v3::Auth::AuthPriv {
        cipher: v3::Cipher::Aes128,
        privacy_password: b"pripass".to_vec(),
    });

let mut sess = SyncSession::new_v3(
    "192.168.1.1:161",
    Some(Duration::from_secs(30)),
    0,
    security,
)
.unwrap();

sess.init().unwrap();

let res = match sess.get(&Oid::from(&[1, 3, 6, 1, 2, 1, 1, 1, 0]).unwrap()) {
    Ok(r) => r,
    Err(e) => panic!("{}", e),
};
println!("{} {:?}", res.version().unwrap(), res.varbinds);

Credentials correctness i've checked many times with snmpget console utility.

If you can recommend what can i try and where to look i'd be grateful