More checks on header line length during reception

[exim.git] / src / src / arc.c

diff --git a/src/src/arc.c b/src/src/arc.c
index 7374ba405b3bf805c8bf67770ede85ef388773b5..6c4bcc641e924e17bb8b37aeeb03180ccc213788 100644 (file)
--- a/src/src/arc.c
+++ b/src/src/arc.c
@@ -984,16 +984,13 @@ return NULL;
 static const uschar *
 arc_verify_seals(arc_ctx * ctx)
 {
-arc_set * as = ctx->arcset_chain;
+arc_set * as = ctx->arcset_chain_last;
 
 if (!as)
   return US"none";
 
-while (as)
-  {
-  if (arc_seal_verify(ctx, as)) return US"fail";
-  as = as->next;
-  }
+for ( ; as; as = as->prev) if (arc_seal_verify(ctx, as)) return US"fail";
+
 DEBUG(D_acl) debug_printf("ARC: AS vfy overall pass\n");
 return NULL;
 }
@@ -1197,7 +1194,7 @@ arc_line * al = (arc_line *)(as+1);
 header_line * h = (header_line *)(al+1);
 
 g = string_catn(g, ARC_HDR_AAR, ARC_HDRLEN_AAR);
-g = string_cat(g, string_sprintf(" i=%d; %s;\r\n\t", instance, identity));
+g = string_fmt_append(g, " i=%d; %s;\r\n\t", instance, identity);
 g = string_catn(g, US ar->data, ar->len);
 
 h->slen = g->ptr - aar_off;
@@ -1258,6 +1255,9 @@ if (  (errstr = exim_dkim_signing_init(privkey, &sctx))
    || (errstr = exim_dkim_sign(&sctx, hm, &hhash, sig)))
   {
   log_write(0, LOG_MAIN, "ARC: %s signing: %s\n", why, errstr);
+  DEBUG(D_transport)
+    debug_printf("private key, or private-key file content, was: '%s'\n",
+      privkey);
   return FALSE;
   }
 return TRUE;
@@ -1307,20 +1307,14 @@ header_line * h = (header_line *)(al+1);
 /* Construct the to-be-signed AMS pseudo-header: everything but the sig. */
 
 ams_off = g->ptr;
-g = string_append(g, 7,
-      ARC_HDR_AMS,
-      US" i=", string_sprintf("%d", instance),
-      US"; a=rsa-sha256; c=relaxed; d=", identity,             /*XXX hardwired */
-      US"; s=", selector);
+g = string_fmt_append(g, "%s i=%d; a=rsa-sha256; c=relaxed; d=%s; s=%s",
+      ARC_HDR_AMS, instance, identity, selector);      /*XXX hardwired a= */
 if (options & ARC_SIGN_OPT_TSTAMP)
-  g = string_append(g, 2,
-      US"; t=", string_sprintf("%lu", (u_long)now));
+  g = string_fmt_append(g, "; t=%lu", (u_long)now);
 if (options & ARC_SIGN_OPT_EXPIRE)
-  g = string_append(g, 2,
-      US"; x=", string_sprintf("%lu", (u_long)expire));
-g = string_append(g, 3,
-      US";\r\n\tbh=", pdkim_encode_base64(bodyhash),
-      US";\r\n\th=");
+  g = string_fmt_append(g, "; x=%lu", (u_long)expire);
+g = string_fmt_append(g, ";\r\n\tbh=%s;\r\n\th=",
+      pdkim_encode_base64(bodyhash));
 
 for(col = 3; rheaders; rheaders = rheaders->prev)
   {
@@ -1605,13 +1599,13 @@ if ((opts = string_nextinlist(&signspec, &sep, NULL, 0)))
       if (*(s += 6) == '=')
        if (*++s == '+')
          {
-         if (!(expire = (time_t)atoi(++s)))
+         if (!(expire = (time_t)atoi(CS ++s)))
            expire = ARC_SIGN_DEFAULT_EXPIRE_DELTA;
          if (!now) now = time(NULL);
          expire += now;
          }
        else
-         expire = (time_t)atol(s);
+         expire = (time_t)atol(CS s);
       else
        {
        if (!now) now = time(NULL);
@@ -1696,12 +1690,13 @@ g = arc_sign_append_ams(g, &arc_sign_ctx, instance, identity, selector,
         including self (but with an empty b= in self)
 */
 
-g = arc_sign_prepend_as(g, &arc_sign_ctx, instance, identity, selector, &ar,
+if (g)
+  g = arc_sign_prepend_as(g, &arc_sign_ctx, instance, identity, selector, &ar,
       privkey, options);
 
 /* Finally, append the dkim headers and return the lot. */
 
-g = string_catn(g, sigheaders->s, sigheaders->ptr);
+if (sigheaders) g = string_catn(g, sigheaders->s, sigheaders->ptr);
 (void) string_from_gstring(g);
 gstring_reset_unused(g);
 return g;
@@ -1800,20 +1795,20 @@ for (as = arc_verify_ctx.arcset_chain, inst = 1; as; as = as->next, inst++)
     blob * d = &hdr_as->d;
 
     for (; inst < as->instance; inst++)
-      g = string_catn(g, ":", 1);
+      g = string_catn(g, US":", 1);
 
     g = d->data && d->len
       ? string_append_listele_n(g, ':', d->data, d->len)
-      : string_catn(g, ":", 1);
+      : string_catn(g, US":", 1);
     }
   else
-    g = string_catn(g, ":", 1);
+    g = string_catn(g, US":", 1);
   }
 return g ? g->s : US"";
 }
 
 
-/* Construct an Authenticate-Results header portion, for the ARC module */
+/* Construct an Authentication-Results header portion, for the ARC module */
 
 gstring *
 authres_arc(gstring * g)
@@ -1827,19 +1822,17 @@ if (arc_state)
   g = string_append(g, 2, US";\n\tarc=", arc_state);
   if (arc_received_instance > 0)
     {
-    g = string_append(g, 3, US" (i=",
-      string_sprintf("%d", arc_received_instance), US")");
+    g = string_fmt_append(g, " (i=%d)", arc_received_instance);
     if (arc_state_reason)
       g = string_append(g, 3, US"(", arc_state_reason, US")");
     g = string_catn(g, US" header.s=", 10);
     highest_ams = arc_received->hdr_ams;
     g = string_catn(g, highest_ams->s.data, highest_ams->s.len);
 
-    g = string_append(g, 2,
-      US" arc.oldest-pass=", string_sprintf("%d", arc_oldest_pass));
+    g = string_fmt_append(g, " arc.oldest-pass=%d", arc_oldest_pass);
 
     if (sender_host_address)
-      g = string_append(g, 2, US" smtp.client-ip=", sender_host_address);
+      g = string_append(g, 2, US" smtp.remote-ip=", sender_host_address);
     }
   else if (arc_state_reason)
     g = string_append(g, 3, US" (", arc_state_reason, US")");