Merge pull request #40686 from Izorkin/ssh

ssh: custom config key types

nixos/modules/programs/ssh.nix

@@ -61,6 +61,29 @@ in
         '';
       };
 
+      # Allow DSA keys for now. (These were deprecated in OpenSSH 7.0.)
+      pubkeyAcceptedKeyTypes = mkOption {
+        type = types.listOf types.str;
+        default = [
+          "+ssh-dss"
+        ];
+        example = [ "ssh-ed25519" "ssh-rsa" ];
+        description = ''
+          Specifies the key types that will be used for public key authentication.
+        '';
+      };
+
+      hostKeyAlgorithms = mkOption {
+        type = types.listOf types.str;
+        default = [
+          "+ssh-dss"
+        ];
+        example = [ "ssh-ed25519" "ssh-rsa" ];
+        description = ''
+          Specifies the host key algorithms that the client wants to use in order of preference.
+        '';
+      };
+
       extraConfig = mkOption {
         type = types.lines;
         default = "";
@@ -188,9 +211,8 @@ in
 
         ForwardX11 ${if cfg.forwardX11 then "yes" else "no"}
 
-        # Allow DSA keys for now. (These were deprecated in OpenSSH 7.0.)
+        PubkeyAcceptedKeyTypes ${concatStringsSep "," cfg.pubkeyAcceptedKeyTypes}
-        PubkeyAcceptedKeyTypes +ssh-dss
+        HostKeyAlgorithms ${concatStringsSep "," cfg.hostKeyAlgorithms}
-        HostKeyAlgorithms +ssh-dss
 
         ${cfg.extraConfig}
       '';