mime: properly pass full lines to non-decoded body

Use actual delim count and make sure we also pass on empty lines
(so delim(s) only).

src/util-decode-mime.c

@@ -1566,7 +1566,7 @@ static int ProcessBodyLine(const uint8_t *buf, uint32_t len,
     SCLogDebug("Processing body line");
 
     /* Track length */
-    entity->body_len += len + 2; /* With CRLF */
+    entity->body_len += (len + state->current_line_delimiter_len);
 
     /* Process base-64 content if enabled */
     MimeDecConfig *mdcfg = MimeDecGetConfig();
@@ -1587,24 +1587,17 @@ static int ProcessBodyLine(const uint8_t *buf, uint32_t len,
         }
     } else {
         /* Process non-decoded content */
-        remaining = len;
+        remaining = len + state->current_line_delimiter_len;
         offset = 0;
         while (remaining > 0) {
-
             /* Plan to add CRLF to the end of each line */
             avail = DATA_CHUNK_SIZE - state->data_chunk_len;
-            tobuf = avail > remaining + EOL_LEN ? remaining : avail - EOL_LEN;
+            tobuf = avail > remaining ? remaining : avail;
 
             /* Copy over to buffer */
             memcpy(state->data_chunk + state->data_chunk_len, buf + offset, tobuf);
             state->data_chunk_len += tobuf;
 
-            /* Now always add a CRLF to the end, unless its a partial line */
-            if (tobuf == remaining && state->current_line_delimiter_len > 0) {
-                memcpy(state->data_chunk + state->data_chunk_len, CRLF, EOL_LEN);
-                state->data_chunk_len += EOL_LEN;
-            }
-
             if ((int) (DATA_CHUNK_SIZE - state->data_chunk_len) < 0) {
                 SCLogDebug("Error: Invalid Chunk length: %u",
                         state->data_chunk_len);
@@ -1613,8 +1606,7 @@ static int ProcessBodyLine(const uint8_t *buf, uint32_t len,
             }
 
             /* If buffer full, then invoke callback */
-            if (DATA_CHUNK_SIZE - state->data_chunk_len < EOL_LEN + 1) {
+            if (DATA_CHUNK_SIZE - state->data_chunk_len == 0) {
-
                 /* Invoke pre-processor and callback */
                 ret = ProcessDecodedDataChunk(state->data_chunk,
                         state->data_chunk_len, state);
@@ -2246,11 +2238,6 @@ static int ProcessMimeBody(const uint8_t *buf, uint32_t len,
         }
     }
 
-    /* Ignore empty lines */
-    if (len == 0) {
-        return ret;
-    }
-
     /* First look for boundary */
     MimeDecStackNode *node = state->stack->top;
     if (node == NULL) {