feature (pgp): pgp widget

Author: mickael-kerjean

server/plugin/plg_widget_pgp/assets/pgp.diff

@@ -0,0 +1,25 @@
+diff --git a/public/assets/pages/viewerpage/application_editor.js b/public/assets/pages/viewerpage/application_editor.js
+index f9fda1e0..c547be20 100644
+--- a/public/assets/pages/viewerpage/application_editor.js
++++ b/public/assets/pages/viewerpage/application_editor.js
+@@ -27,1 +27,2 @@ class IEditor {}
+ export default async function(render, { acl$, getFilename, getDownloadUrl, mime }) {
++    if ((await import("./pgp.js")).isPGPFile(getFilename())) acl$ = rxjs.of(["GET"]);
+@@ -54,1 +54,1 @@ export default async function(render, { acl$, getFilename, getDownloadUrl, mime
+-            cat(getDownloadUrl()),
++            cat(await import("/plg_widget_pgp/pgp.js").then((m) => m.isPGPFile(getFilename()) ? m.decode(getDownloadUrl()) : getDownloadUrl())),
+diff --git a/public/assets/pages/viewerpage/application_image.js b/public/assets/pages/viewerpage/application_image.js
+index 1227d426..b82330aa 100644
+--- a/public/assets/pages/viewerpage/application_image.js
++++ b/public/assets/pages/viewerpage/application_image.js
+@@ -65,1 +65,3 @@ export default function(render, { getFilename, getDownloadUrl, mime, hasMenubar
+             let src = `${getDownloadUrl()}&size=${window.innerWidth}`;
++            const m = await import("/plg_widget_pgp/pgp.js");
++            if (m.isPGPFile(getFilename())) src = await m.decode(src);
+diff --git a/public/assets/pages/viewerpage/mimetype.js b/public/assets/pages/viewerpage/mimetype.js
+index 0adb0934..d002a70e 100644
+--- a/public/assets/pages/viewerpage/mimetype.js
++++ b/public/assets/pages/viewerpage/mimetype.js
+@@ -3,1 +3,2 @@ import { get as getPlugin } from "../../model/plugin.js";
+ export function opener(file = "", mimes) {
++    file = file.replace(new RegExp(".gpg$"), "");

server/plugin/plg_widget_pgp/assets/pgp.js

@@ -0,0 +1,53 @@
+import { createElement } from "../../lib/skeleton/index.js";
+import { createModal, MODAL_RIGHT_BUTTON } from "../../components/modal.js";
+import notification from "../../components/notification.js";
+import { qs, safe } from "../../lib/dom.js";
+
+import * as openpgp from "https://unpkg.com/openpgp@6.3.0/dist/openpgp.min.mjs";
+
+export function isPGPFile(path) {
+    return new RegExp(".gpg$").test(path);
+}
+
+export async function decode(src) {
+    const $page = createElement(`
+        <div class="component_pgp">
+            <textarea value=""></textarea>
+            <style>${CSS}</style>
+        </div>
+    `);
+    $page.querySelector("textarea").value = `gpg --armor --export-secret-keys me@example.com`;
+    return new Promise((done) => createModal({ withButtonsRight: "decrypt", withButtonsLeft: "cancel" })($page, async (n) => {
+        if (n !== MODAL_RIGHT_BUTTON) return done(src);
+        try {
+            const res = await fetch(src);
+            const encrypted = await res.arrayBuffer();
+            const message = await openpgp.readMessage({
+                binaryMessage: new Uint8Array(encrypted),
+            });
+            const privateKey = await openpgp.readPrivateKey({
+                armoredKey: qs($page, "textarea").value,
+            });
+            const { data } = await openpgp.decrypt({
+                message,
+                decryptionKeys: privateKey,
+                format: "binary",
+            });
+            done(URL.createObjectURL(new Blob([data])));
+        } catch (err) {
+            notification.error(err);
+            done(src);
+        } finally {
+            $page.remove();
+        }
+    }));
+}
+
+const CSS = `
+.component_pgp textarea {
+    width: 100%;
+    border: none;
+    height: 300px;
+    font-size: 0.5rem;
+}
+`;

server/plugin/plg_widget_pgp/index.go

@@ -0,0 +1,30 @@
+package plg_widget_chat
+
+import (
+	_ "embed"
+	"net/http"
+
+	. "github.com/mickael-kerjean/filestash/server/common"
+
+	"github.com/gorilla/mux"
+)
+
+//go:embed assets/pgp.js
+var CTRLJS []byte
+
+//go:embed assets/pgp.diff
+var PATCH []byte
+
+func init() {
+	Hooks.Register.HttpEndpoint(func(r *mux.Router) error {
+		r.HandleFunc(WithBase("/plg_widget_pgp/pgp.js"), func(res http.ResponseWriter, req *http.Request) {
+			http.Redirect(res, req, WithBase("/assets/"+BUILD_REF+"/pages/viewerpage/pgp.js"), http.StatusSeeOther)
+		})
+		r.HandleFunc(WithBase("/assets/"+BUILD_REF+"/pages/viewerpage/pgp.js"), func(res http.ResponseWriter, req *http.Request) {
+			res.Header().Set("Content-Type", "application/javascript")
+			res.Write(CTRLJS)
+		}).Methods("GET")
+		return nil
+	})
+	Hooks.Register.StaticPatch(PATCH)
+}