fix(net_ssh): use filename parameter instead of hardcoded RSA path in bind_key

[unle4rn]

Bug

bind_key() in nets/net_ssh.c (line 112) passes a hardcoded KEYS_FOLDER "ssh_host_rsa_key" to ssh_bind_options_set() regardless of the filename argument, causing all non-RSA key types to fail to load.

Current code

static int bind_key(enum ssh_bind_options_e opt, const char *filename)
{
    if (eaccess(filename, R_OK)) {
        bbs_warning("Can't access key %s - missing or not readable?\n", filename);
        return 0;
    }
    return ssh_bind_options_set(sshbind, opt, KEYS_FOLDER "ssh_host_rsa_key") ? 0 : 1;
}

Expected

    return ssh_bind_options_set(sshbind, opt, filename) ? 0 : 1;

Impact

If the system only has an ed25519 key (no RSA key), net_ssh fails to start with:

ERROR: net_ssh.c:145 start_ssh: Failed to configure listener, unable to bind any SSH keys

The eaccess() check passes for the ed25519 key, but then ssh_bind_options_set is called with the RSA path which doesn't exist, so it silently fails and returns 0 keys bound.

Environment

• LBBS master branch (cloned 2026-06-06)
• Debian 13 (Trixie), libssh 0.11.2
• Config: [keys] with only ed25519 = yes, rsa/dsa/ecdsa = no

Fix

One-line change — replace the hardcoded string with the filename parameter on line 112.

[InterLinked1]

This smells like an AI pull request. Did you actually investigate/test any of this?

[unle4rn]

This smells like an AI pull request. Did you actually investigate/test any of this?

The PR body is AI written yes (no shame), but, of course I tested it, as that is how I was able to get this to work regardless :P you can review the change yourself as it's a pretty common sense change.