feat: Temporary certificate acceptance backend

We use the 'certificate-error' event of webContents to detect
certificate verification errors and display a message to manually trust
the certificate.

Certificates are trusted per profile and only until Sophie is restarted.

We still need to build the associated UI, the current one is just a
rough prototype for debugging.

Signed-off-by: Kristóf Marussy <kristof@marussy.com>

1 files changed, 27 insertions, 0 deletions

diff --git a/packages/main/src/infrastructure/electron/impl/ElectronServiceView.ts b/packages/main/src/infrastructure/electron/impl/ElectronServiceView.ts
index d90ff19..edcf758 100644
--- a/packages/main/src/infrastructure/electron/impl/ElectronServiceView.ts
+++ b/packages/main/src/infrastructure/electron/impl/ElectronServiceView.ts
@@ -93,6 +93,33 @@ export default class ElectronServiceView implements ServiceView {
       },
     );
 
+    /**
+     * We use the `'certificate-error'` event instead of `session.setCertificateVerifyProc`
+     * because:
+     *
+     * 1. `'certificate-error'` is bound to the `webContents`, so we can display the certificate
+     *    in the place of the correct service. Note that chromium still manages certificate trust
+     *    per session, so we can't have different trusted certificates for each service of a
+     *    profile.
+     * 2. The results of `'certificate-error'` are _not_ cached, so we can initially reject
+     *    the certificate but we can still accept it once the user trusts it temporarily.
+     */
+    webContents.on(
+      'certificate-error',
+      (event, url, error, certificate, callback, isMainFrame) => {
+        if (service.isCertificateTemporarilyTrusted(certificate)) {
+          event.preventDefault();
+          callback(true);
+          return;
+        }
+        if (isMainFrame) {
+          setLocation(url);
+          service.setCertificateError(error, certificate);
+        }
+        callback(false);
+      },
+    );
+
     webContents.on('page-title-updated', (_event, title) => {
       service.setTitle(title);
     });