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openssh known hosts: ignore hosts without aliases

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tv 2022-07-15 10:27:30 +02:00
parent 9b37b535f4
commit faf453da0b
1 changed files with 47 additions and 34 deletions
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81
krebs/3modules/default.nix
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@ -138,41 +138,54 @@ let
let inherit (config.krebs.build.host.ssh) privkey; in
mkIf (privkey != null) [privkey];
# TODO use imports for merging
services.openssh.knownHosts =
(let inherit (config.krebs.build.host.ssh) pubkey; in
optionalAttrs (pubkey != null) {
localhost = {
hostNames = ["localhost" "127.0.0.1" "::1"];
publicKey = pubkey;
};
})
//
mapAttrs
(name: host: {
hostNames =
concatLists
(mapAttrsToList
(net-name: net:
let
longs = net.aliases;
shorts =
optionals
(cfg.dns.search-domain != null)
(map (removeSuffix ".${cfg.dns.search-domain}")
(filter (hasSuffix ".${cfg.dns.search-domain}")
longs));
add-port = a:
if net.ssh.port != 22
then "[${a}]:${toString net.ssh.port}"
else a;
in
map add-port (shorts ++ longs ++ net.addrs))
host.nets);
publicKey = host.ssh.pubkey;
})
(filterAttrs (_: host: host.ssh.pubkey != null) cfg.hosts);
filterAttrs
(knownHostName: knownHost:
knownHost.publicKey != null &&
knownHost.hostNames != []
)
(mapAttrs
(hostName: host: {
hostNames =
concatLists
(mapAttrsToList
(netName: net:
let
aliases =
concatLists [
shortAliases
net.aliases
net.addrs
];
shortAliases =
optionals
(cfg.dns.search-domain != null)
(map (removeSuffix ".${cfg.dns.search-domain}")
(filter (hasSuffix ".${cfg.dns.search-domain}")
net.aliases));
addPort = alias:
if net.ssh.port != 22
then "[${alias}]:${toString net.ssh.port}"
else alias;
in
map addPort aliases
)
host.nets);
publicKey = host.ssh.pubkey;
})
(foldl' mergeAttrs {} [
cfg.hosts
{
localhost = {
nets.local = {
addrs = [ "127.0.0.1" "::1" ];
aliases = [ "localhost" ];
ssh.port = 22;
};
ssh.pubkey = config.krebs.build.host.ssh.pubkey;
};
}
]));
programs.ssh.extraConfig = concatMapStrings
(net: ''