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|
{ config, lib, pkgs, ... }:
with lib;
let
cfg = config.programs.ssh;
knownHosts = map (h: getAttr h cfg.knownHosts) (attrNames cfg.knownHosts);
host =
{ name, ... }:
{
options = {
hostNames = mkOption {
type = types.listOf types.str;
default = [];
description = ''
A list of host names and/or IP numbers used for accessing
the host's ssh service.
'';
};
publicKey = mkOption {
default = null;
type = types.nullOr types.str;
example = "ecdsa-sha2-nistp521 AAAAE2VjZHN...UEPg==";
description = ''
The public key data for the host. You can fetch a public key
from a running SSH server with the <command>ssh-keyscan</command>
command. The public key should not include any host names, only
the key type and the key itself.
'';
};
publicKeyFile = mkOption {
default = null;
type = types.nullOr types.path;
description = ''
The path to the public key file for the host. The public
key file is read at build time and saved in the Nix store.
You can fetch a public key file from a running SSH server
with the <command>ssh-keyscan</command> command. The content
of the file should follow the same format as described for
the <literal>publicKey</literal> option.
'';
};
};
config = {
hostNames = mkDefault [ name ];
};
};
in
{
options = {
programs.ssh.knownHosts = mkOption {
default = {};
type = types.loaOf (types.submodule host);
description = ''
The set of system-wide known SSH hosts.
'';
example = literalExample ''
[
{
hostNames = [ "myhost" "myhost.mydomain.com" "10.10.1.4" ];
publicKeyFile = ./pubkeys/myhost_ssh_host_dsa_key.pub;
}
{
hostNames = [ "myhost2" ];
publicKeyFile = ./pubkeys/myhost2_ssh_host_dsa_key.pub;
}
]
'';
};
};
config = {
assertions = flip mapAttrsToList cfg.knownHosts (name: data: {
assertion = (data.publicKey == null && data.publicKeyFile != null) ||
(data.publicKey != null && data.publicKeyFile == null);
message = "knownHost ${name} must contain either a publicKey or publicKeyFile";
});
environment.etc."ssh/ssh_known_hosts".text = (flip (concatMapStringsSep "\n") knownHosts
(h: assert h.hostNames != [];
concatStringsSep "," h.hostNames + " "
+ (if h.publicKey != null then h.publicKey else readFile h.publicKeyFile)
)) + "\n";
};
}
|
