tools/dune

@@ -1,5 +1,5 @@
 (executable
  (public_name offline)
  (name offline)
- (modules offline offline_bin)
+ (modules offline offline_impl offline_bin)
  (libraries cmdliner bos fmt mirage-crypto ptime mte vif))

tools/offline.ml

@@ -1,67 +1,6 @@
-(* TODO
-   - clean up cmdliner
-   - setup: need public key in config file
-   - check sigs *)
-(* doc: https://docs.taler.net/manpages/taler-exchange-offline.1.html *)
-
-open Syntax
-
-let read_file fname = Bos.OS.File.read (Fpath.v fname) |> unwrap_err_msg
-
-let write_file fname content =
-  Bos.OS.File.write (Fpath.v fname) content |> unwrap_err_msg
-
-let base_url = Uri.of_string "http://localhost:3434/"
-
-let management_keys_url =
-  Uri.with_path base_url "/management/keys/" |> Uri.to_string
-
-let download ~output =
-  let open Bos in
-  let uri = management_keys_url in
-  OS.Cmd.run Cmd.(v "curl" % "-s" % "-o" % output % "-X" % "GET" % uri)
-
-let upload ~input =
-  let open Bos in
-  let uri = management_keys_url in
-  OS.Cmd.run
-    Cmd.(
-      v "curl"
-      % "-i"
-      % "-X"
-      % "POST"
-      % "-H"
-      % "Content-Type: application/json"
-      % "--data"
-      % ("@" ^ input)
-      % uri)
-
-let setup ~output =
-  let () = Mirage_crypto_rng_unix.use_default () in
-  let priv, pub = Mirage_crypto_ec.Ed25519.generate () in
-  Fmt.pr "generated master public key:@\n%s@."
-    (Mirage_crypto_ec.Ed25519.pub_to_octets pub |> B32.encode);
-  let priv_data = Mirage_crypto_ec.Ed25519.priv_to_octets priv in
-  write_file output priv_data
-
-let sign ~master_key ~input ~output =
-  let open Crypto in
-  let* input = read_file input in
-  let* master_key = read_file master_key in
-  let master_key = EddsaPrivateKey.of_octets master_key in
-  let* future_key_response = Api.decode Api.FutureKeysResponse.jsont input in
-  let* () = Offline_bin.verify_future_key_response future_key_response in
-  let master_signatures =
-    Offline_bin.make_master_signatures ~master_key future_key_response
-  in
-  let* s = Api.encode Api.MasterSignatures.jsont master_signatures in
-  let* () = write_file output s in
-  Ok ()
-
-(* CLI *)
-
 open Cmdliner
 open Cmdliner.Term.Syntax
+open Offline_impl
 
 let default_master_offline_key_file = "data/master_offline_private_key"
 let default_response_file = "response.json"
@@ -95,7 +34,7 @@ let download_cmd =
   @@ Term.ret
   @@
   let+ output = output in
-  download ~output |> unwrap_err_msg |> to_term_ret
+  download ~output |> to_term_ret
 
 let upload_cmd =
   let doc = "POST /management/keys/" in
@@ -109,7 +48,7 @@ let upload_cmd =
   @@ Term.ret
   @@
   let+ input = input in
-  upload ~input |> unwrap_err_msg |> to_term_ret
+  upload ~input |> to_term_ret
 
 let sign_cmd =
   let doc = "Sign FutureKeysResponse." in

tools/offline_impl.ml

@@ -0,0 +1,57 @@
+(* TODO
+   - check sigs *)
+open Syntax
+
+let read_file fname = Bos.OS.File.read (Fpath.v fname) |> unwrap_err_msg
+
+let write_file fname content =
+  Bos.OS.File.write (Fpath.v fname) content |> unwrap_err_msg
+
+let base_url = Uri.of_string "http://localhost:3434/"
+
+let management_keys_url =
+  Uri.with_path base_url "/management/keys/" |> Uri.to_string
+
+let download ~output =
+  let open Bos in
+  let uri = management_keys_url in
+  OS.Cmd.run Cmd.(v "curl" % "-s" % "-o" % output % "-X" % "GET" % uri)
+  |> unwrap_err_msg
+
+let upload ~input =
+  let open Bos in
+  let uri = management_keys_url in
+  OS.Cmd.run
+    Cmd.(
+      v "curl"
+      % "-i"
+      % "-X"
+      % "POST"
+      % "-H"
+      % "Content-Type: application/json"
+      % "--data"
+      % ("@" ^ input)
+      % uri)
+  |> unwrap_err_msg
+
+let setup ~output =
+  let () = Mirage_crypto_rng_unix.use_default () in
+  let priv, pub = Mirage_crypto_ec.Ed25519.generate () in
+  Fmt.pr "generated master public key:@\n%s@."
+    (Mirage_crypto_ec.Ed25519.pub_to_octets pub |> B32.encode);
+  let priv_data = Mirage_crypto_ec.Ed25519.priv_to_octets priv in
+  write_file output priv_data
+
+let sign ~master_key ~input ~output =
+  let open Crypto in
+  let* input = read_file input in
+  let* master_key = read_file master_key in
+  let master_key = EddsaPrivateKey.of_octets master_key in
+  let* future_key_response = Api.decode Api.FutureKeysResponse.jsont input in
+  let* () = Offline_bin.verify_future_key_response future_key_response in
+  let master_signatures =
+    Offline_bin.make_master_signatures ~master_key future_key_response
+  in
+  let* s = Api.encode Api.MasterSignatures.jsont master_signatures in
+  let* () = write_file output s in
+  Ok ()