diff options
| -rw-r--r-- | src/libserver/dkim.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/src/libserver/dkim.c b/src/libserver/dkim.c index 29cb30fb9..2a2e7a7a7 100644 --- a/src/libserver/dkim.c +++ b/src/libserver/dkim.c @@ -2062,6 +2062,22 @@ rspamd_dkim_canonize_header (struct rspamd_dkim_common_ctx *ctx, ar = g_hash_table_lookup (task->raw_headers, header_name); if (ar) { + /* Check uniqueness of the header */ + rh = g_ptr_array_index (ar, 0); + if ((rh->type & RSPAMD_HEADER_UNIQUE) && ar->len > 1) { + guint64 random_cookie = ottery_rand_uint64 (); + + msg_warn_dkim ("header %s is intended to be unique by" + " email standards, but we have %d headers of this" + " type, artificially break DKIM check", header_name, + ar->len); + rspamd_dkim_hash_update (ctx->headers_hash, + (const gchar *)&random_cookie, + sizeof (random_cookie)); + + return FALSE; + } + if (ar->len > count) { /* Set skip count */ rh_num = ar->len - count - 1; |