Allow self-signed .onion file transfer certs (#1149)

Most Certificate Authorities don't support issuing X.509 certificates for onion
sites. However, it can still be useful to provide a certificate over Tor in
some circumstances, for instance to tie your alphanumeric Tor address to your
site's main identity.

Therefore, many Tor services provide self-signed certificates. This is OK,
since the onion service itself guarantees that you are connecting to the entity
you think you are.

Dino already allows self-signed certs when communicating over Tor (see
81a5505). However, the same exception does not exist yet for HTTP uploads and
downloads - causing these to fail over Tor.

Therefore, in this commit, we add the same exception for uploads/downloads, by
passing the host of the upload/download urls to the already existing invalid
certificate connection handler.

Note that this handler only allows certificates with type
TlsCertificateFlags.UNKNOWN_CA. This means the certificate of your server must
also include the onion http upload and download URLs in its certificate -
otherwise, the file transfer will fail with TlsCertificateFlags.BAD_IDENTITY.

2 files changed, 13 insertions, 0 deletions

diff --git a/plugins/http-files/src/file_provider.vala b/plugins/http-files/src/file_provider.vala
index 34c3a48a..d62e3561 100644
--- a/plugins/http-files/src/file_provider.vala
+++ b/plugins/http-files/src/file_provider.vala
@@ -120,6 +120,11 @@ public class FileProvider : Dino.FileProvider, Object {
         var head_message = new Soup.Message("HEAD", http_receive_data.url);
         head_message.request_headers.append("Accept-Encoding", "identity");
 
+#if SOUP_3_0
+        string transfer_host = Uri.parse(http_receive_data.url, UriFlags.NONE).get_host();
+        head_message.accept_certificate.connect((peer_cert, errors) => { return ConnectionManager.on_invalid_certificate(transfer_host, peer_cert, errors); });
+#endif
+
         try {
 #if SOUP_3_0
             yield session.send_async(head_message, GLib.Priority.LOW, null);
@@ -153,6 +158,11 @@ public class FileProvider : Dino.FileProvider, Object {
 
         var get_message = new Soup.Message("GET", http_receive_data.url);
 
+#if SOUP_3_0
+        string transfer_host = Uri.parse(http_receive_data.url, UriFlags.NONE).get_host();
+        get_message.accept_certificate.connect((peer_cert, errors) => { return ConnectionManager.on_invalid_certificate(transfer_host, peer_cert, errors); });
+#endif
+
         try {
 #if SOUP_3_0
             InputStream stream = yield session.send_async(get_message, GLib.Priority.LOW, file_transfer.cancellable);
diff --git a/plugins/http-files/src/file_sender.vala b/plugins/http-files/src/file_sender.vala
index 957611d0..a2f4769b 100644
--- a/plugins/http-files/src/file_sender.vala
+++ b/plugins/http-files/src/file_sender.vala
@@ -94,7 +94,10 @@ public class HttpFileSender : FileSender, Object {
         if (stream == null) return;
 
         var put_message = new Soup.Message("PUT", file_send_data.url_up);
+
 #if SOUP_3_0
+        string transfer_host = Uri.parse(file_send_data.url_up, UriFlags.NONE).get_host();
+        put_message.accept_certificate.connect((peer_cert, errors) => { return ConnectionManager.on_invalid_certificate(transfer_host, peer_cert, errors); });
         put_message.set_request_body(file_meta.mime_type, file_transfer.input_stream, (ssize_t) file_meta.size);
 #else
         put_message.request_headers.set_content_type(file_meta.mime_type, null);