3 files changed, 9 insertions, 11 deletions

diff --git a/toxcore/Messenger.c b/toxcore/Messenger.c
index 39572dd0..e85e5ee0 100644
--- a/toxcore/Messenger.c
+++ b/toxcore/Messenger.c
@@ -1115,9 +1115,6 @@ long int new_filesender(const Messenger *m, int32_t friendnumber, uint32_t file_
     if (filename_length > MAX_FILENAME_LENGTH)
         return -2;
 
-    if (file_type == FILEKIND_AVATAR && filename_length != crypto_hash_sha256_BYTES)
-        return -2;
-
     uint32_t i;
 
     for (i = 0; i < MAX_CONCURRENT_FILE_PIPES; ++i) {
@@ -2005,10 +2002,15 @@ static int handle_packet(void *object, int i, uint8_t *temp, uint16_t len)
             ft->paused = FILE_PAUSE_NOT;
             memcpy(ft->id, data + 1 + sizeof(uint32_t) + sizeof(uint64_t), FILE_ID_LENGTH);
 
-            /* Force NULL terminate file name. */
             uint8_t filename_terminated[filename_length + 1];
-            memcpy(filename_terminated, data + head_length, filename_length);
-            filename_terminated[filename_length] = 0;
+            uint8_t *filename = NULL;
+
+            if (filename_length) {
+                /* Force NULL terminate file name. */
+                memcpy(filename_terminated, data + head_length, filename_length);
+                filename_terminated[filename_length] = 0;
+                filename = filename_terminated;
+            }
 
             uint32_t real_filenumber = filenumber;
             real_filenumber += 1;
diff --git a/toxcore/tox.c b/toxcore/tox.c
index b793bd8c..36f87cc6 100644
--- a/toxcore/tox.c
+++ b/toxcore/tox.c
@@ -910,7 +910,7 @@ bool tox_file_get_file_id(const Tox *tox, uint32_t friend_number, uint32_t file_
 uint32_t tox_file_send(Tox *tox, uint32_t friend_number, uint32_t kind, uint64_t file_size, const uint8_t *file_id,
                        const uint8_t *filename, size_t filename_length, TOX_ERR_FILE_SEND *error)
 {
-    if (!filename) {
+    if (filename_length && !filename) {
         SET_ERROR_PARAMETER(error, TOX_ERR_FILE_SEND_NULL);
         return UINT32_MAX;
     }
diff --git a/toxcore/tox.h b/toxcore/tox.h
index b255de5e..8587dfa9 100644
--- a/toxcore/tox.h
+++ b/toxcore/tox.h
@@ -1584,10 +1584,6 @@ typedef enum TOX_ERR_FILE_SEND {
      */
     TOX_ERR_FILE_SEND_FRIEND_NOT_CONNECTED,
     /**
-     * Filename length was 0.
-     */
-    TOX_ERR_FILE_SEND_NAME_EMPTY,
-    /**
      * Filename length exceeded 255 bytes.
      */
     TOX_ERR_FILE_SEND_NAME_INVALID_LENGTH,