1 files changed, 59 insertions, 0 deletions
diff --git a/os/kay/modules/services/sftp.nix b/os/kay/modules/services/sftp.nix
new file mode 100644
index 0000000..f75abc4
--- /dev/null
+++ b/os/kay/modules/services/sftp.nix
@@ -0,0 +1,59 @@
+{ config, ... }:
+
+let
+  storage = "/hdd/users";
+  user = config.global.userdata.name;
+  pubKeys = config.users.users.${user}.openssh.authorizedKeys.keys;
+in
+{
+  users = {
+    groups."sftp".members = [ ];
+
+    users."sftp" = {
+      group = "sftp";
+      shell = "/run/current-system/sw/bin/nologin";
+      isNormalUser = true;
+      openssh.authorizedKeys.keys = [
+        "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIFmA1dyV+o9gfoxlbVG0Y+dn3lVqdFs5fMqfxyNc5/Lr sftp@cez"
+        # https://github.com/zhanghai/MaterialFiles
+        "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAILxKrIaWRACi0oKfJRv6m3uUWKjKNyd9edbbFR5pAONH sftp@paq"
+        # samsung files only support PEM, hence RSA key
+        # https://r1.community.samsung.com/t5/galaxy-s/unable-to-remotely-connect-to-sftp-server-through-my-files/m-p/16347552/highlight/true#M105871
+        "ssh-rsa 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 sftp@paq"
+      ]
+      ++ pubKeys;
+    };
+
+    users."nazer" = {
+      group = "sftp";
+      shell = "/run/current-system/sw/bin/nologin";
+      isNormalUser = true;
+      openssh.authorizedKeys.keys = [
+        "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAICV09w9Ovk9wk4Bhn/06iOn+Ss8lK3AmQAl8+lXHRycu nazu@pc"
+      ];
+    };
+  };
+
+  services.openssh = {
+    # support samsing files
+    settings = {
+      HostKeyAlgorithms = "+ssh-rsa";
+      PubkeyAcceptedAlgorithms = "+ssh-rsa";
+      Macs = [ "hmac-sha2-256" ];
+    };
+
+    # sandboxing
+    extraConfig = ''
+      Match Group sftp
+      # chroot dir should be owned by root
+      # and sub dirs by %u
+      ChrootDirectory ${storage}/%u
+      ForceCommand internal-sftp
+
+      PermitTunnel no
+      AllowAgentForwarding no
+      AllowTcpForwarding no
+      X11Forwarding no
+    '';
+  };
+}