crypto: index encrypted parts when indexopts try_decrypt is set.

[notmuch] / lib / index.cc

diff --git a/lib/index.cc b/lib/index.cc
index e5ae2ba73d568027f1c661994e073aff8852a942..6e684f5fcda76dcc5fe81895e25194d7c1186e45 100644 (file)
--- a/lib/index.cc
+++ b/lib/index.cc
@@ -364,9 +364,15 @@ _index_content_type (notmuch_message_t *message, GMimeObject *part)
     }
 }
 
+static void
+_index_encrypted_mime_part (notmuch_message_t *message, notmuch_indexopts_t *indexopts,
+                           GMimeContentType *content_type,
+                           GMimeMultipartEncrypted *part);
+
 /* Callback to generate terms for each mime part of a message. */
 static void
 _index_mime_part (notmuch_message_t *message,
+                 notmuch_indexopts_t *indexopts,
                  GMimeObject *part)
 {
     GMimeStream *stream, *filter;
@@ -385,6 +391,7 @@ _index_mime_part (notmuch_message_t *message,
     }
 
     _index_content_type (message, part);
+    content_type = g_mime_object_get_content_type (part);
 
     if (GMIME_IS_MULTIPART (part)) {
        GMimeMultipart *multipart = GMIME_MULTIPART (part);
@@ -409,17 +416,21 @@ _index_mime_part (notmuch_message_t *message,
                }
            }
            if (GMIME_IS_MULTIPART_ENCRYPTED (multipart)) {
-               /* Don't index encrypted parts, but index their content type. */
                _index_content_type (message,
                                     g_mime_multipart_get_part (multipart, i));
-               if ((i != GMIME_MULTIPART_ENCRYPTED_VERSION) &&
-                   (i != GMIME_MULTIPART_ENCRYPTED_CONTENT)) {
-                   _notmuch_database_log (_notmuch_message_database (message),
-                                          "Warning: Unexpected extra parts of multipart/encrypted.\n");
+               if (i == GMIME_MULTIPART_ENCRYPTED_CONTENT) {
+                   _index_encrypted_mime_part(message, indexopts,
+                                              content_type,
+                                              GMIME_MULTIPART_ENCRYPTED (part));
+               } else {
+                   if (i != GMIME_MULTIPART_ENCRYPTED_VERSION) {
+                       _notmuch_database_log (_notmuch_message_database (message),
+                                              "Warning: Unexpected extra parts of multipart/encrypted.\n");
+                   }
                }
                continue;
            }
-           _index_mime_part (message,
+           _index_mime_part (message, indexopts,
                              g_mime_multipart_get_part (multipart, i));
        }
        return;
@@ -430,7 +441,7 @@ _index_mime_part (notmuch_message_t *message,
 
        mime_message = g_mime_message_part_get_message (GMIME_MESSAGE_PART (part));
 
-       _index_mime_part (message, g_mime_message_get_mime_part (mime_message));
+       _index_mime_part (message, indexopts, g_mime_message_get_mime_part (mime_message));
 
        return;
     }
@@ -464,7 +475,6 @@ _index_mime_part (notmuch_message_t *message,
 
     filter = g_mime_stream_filter_new (stream);
 
-    content_type = g_mime_object_get_content_type (part);
     discard_non_term_filter = notmuch_filter_discard_non_term_new (content_type);
 
     g_mime_stream_filter_add (GMIME_STREAM_FILTER (filter),
@@ -502,8 +512,71 @@ _index_mime_part (notmuch_message_t *message,
     }
 }
 
+/* descend (if desired) into the cleartext part of an encrypted MIME
+ * part while indexing. */
+static void
+_index_encrypted_mime_part (notmuch_message_t *message,
+                           notmuch_indexopts_t *indexopts,
+                           g_mime_3_unused(GMimeContentType *content_type),
+                           GMimeMultipartEncrypted *encrypted_data)
+{
+    notmuch_status_t status;
+    GError *err = NULL;
+    notmuch_database_t * notmuch = NULL;
+    GMimeObject *clear = NULL;
+
+    if (!indexopts || !notmuch_indexopts_get_try_decrypt (indexopts))
+       return;
+
+    notmuch = _notmuch_message_database (message);
+
+#if (GMIME_MAJOR_VERSION < 3)
+    {
+       GMimeCryptoContext* crypto_ctx = NULL;
+       const char *protocol = NULL;
+       protocol = g_mime_content_type_get_parameter (content_type, "protocol");
+       status = _notmuch_crypto_get_gmime_ctx_for_protocol (&(indexopts->crypto),
+                                                        protocol, &crypto_ctx);
+       if (status) {
+           _notmuch_database_log (notmuch, "Warning: setup failed for decrypting "
+                                  "during indexing. (%d)\n", status);
+           status = notmuch_message_add_property (message, "index.decryption", "failure");
+           if (status)
+               _notmuch_database_log_append (notmuch, "failed to add index.decryption "
+                                             "property (%d)\n", status);
+           return;
+       }
+       clear = g_mime_multipart_encrypted_decrypt(encrypted_data, crypto_ctx,
+                                                  NULL, &err);
+    }
+#else
+    clear = g_mime_multipart_encrypted_decrypt(encrypted_data, GMIME_DECRYPT_NONE, NULL,
+                                              NULL, &err);
+#endif
+    if (err) {
+       _notmuch_database_log (notmuch, "Failed to decrypt during indexing. (%d:%d) [%s]\n",
+                              err->domain, err->code, err->message);
+       g_error_free(err);
+       /* Indicate that we failed to decrypt during indexing */
+       status = notmuch_message_add_property (message, "index.decryption", "failure");
+       if (status)
+           _notmuch_database_log_append (notmuch, "failed to add index.decryption "
+                                         "property (%d)\n", status);
+       return;
+    }
+    _index_mime_part (message, indexopts, clear);
+    g_object_unref (clear);
+
+    status = notmuch_message_add_property (message, "index.decryption", "success");
+    if (status)
+       _notmuch_database_log (notmuch, "failed to add index.decryption "
+                              "property (%d)\n", status);
+
+}
+
 notmuch_status_t
 _notmuch_message_index_file (notmuch_message_t *message,
+                            notmuch_indexopts_t *indexopts,
                             notmuch_message_file_t *message_file)
 {
     GMimeMessage *mime_message;
@@ -531,7 +604,7 @@ _notmuch_message_index_file (notmuch_message_t *message,
     subject = g_mime_message_get_subject (mime_message);
     _notmuch_message_gen_terms (message, "subject", subject);
 
-    _index_mime_part (message, g_mime_message_get_mime_part (mime_message));
+    _index_mime_part (message, indexopts, g_mime_message_get_mime_part (mime_message));
 
     return NOTMUCH_STATUS_SUCCESS;
 }