From ede8defad4f44478f69e148022b542a694498087 Mon Sep 17 00:00:00 2001
From: Andreas Baumann <mail@andreasbaumann.cc>
Date: Tue, 19 Jan 2021 18:32:27 +0100
Subject: check_curl: fixed help, usage and errors for TLS 1.3


diff --git a/plugins/check_curl.c b/plugins/check_curl.c
index 2d69b31..ef77918 100644
--- a/plugins/check_curl.c
+++ b/plugins/check_curl.c
@@ -1354,7 +1354,7 @@ process_arguments (int argc, char **argv)
           ssl_version = CURL_SSLVERSION_DEFAULT;
 #endif /* LIBCURL_VERSION_NUM >= MAKE_LIBCURL_VERSION(7, 52, 0) */
         else
-          usage4 (_("Invalid option - Valid SSL/TLS versions: 2, 3, 1, 1.1, 1.2 (with optional '+' suffix)"));
+          usage4 (_("Invalid option - Valid SSL/TLS versions: 2, 3, 1, 1.1, 1.2, 1.3 (with optional '+' suffix)"));
       }
 #if LIBCURL_VERSION_NUM >= MAKE_LIBCURL_VERSION(7, 54, 0)
       if (got_plus) {
@@ -1659,7 +1659,7 @@ print_help (void)
   printf (" %s\n", "-S, --ssl=VERSION[+]");
   printf ("    %s\n", _("Connect via SSL. Port defaults to 443. VERSION is optional, and prevents"));
   printf ("    %s\n", _("auto-negotiation (2 = SSLv2, 3 = SSLv3, 1 = TLSv1, 1.1 = TLSv1.1,"));
-  printf ("    %s\n", _("1.2 = TLSv1.2). With a '+' suffix, newer versions are also accepted."));
+  printf ("    %s\n", _("1.2 = TLSv1.2, 1.3 = TLSv1.3). With a '+' suffix, newer versions are also accepted."));
   printf ("    %s\n", _("Note: SSLv2 and SSLv3 are deprecated and are usually disabled in libcurl"));
   printf (" %s\n", "--sni");
   printf ("    %s\n", _("Enable SSL/TLS hostname extension support (SNI)"));
-- 
cgit v0.10-9-g596f


From d9a5d1faf0400b9da47dee516c035da1a93dc12c Mon Sep 17 00:00:00 2001
From: Andreas Baumann <mail@andreasbaumann.cc>
Date: Tue, 19 Jan 2021 18:35:41 +0100
Subject: check_curl: fixed a potential buffer overflow in url buffer


diff --git a/plugins/check_curl.c b/plugins/check_curl.c
index ef77918..a3f63f1 100644
--- a/plugins/check_curl.c
+++ b/plugins/check_curl.c
@@ -1041,7 +1041,7 @@ redir (curlhelp_write_curlbuf* header_buf)
     const UriPathSegmentA* p = uri.pathHead;
     for (; p; p = p->next) {
       strncat (new_url, "/", DEFAULT_BUFFER_SIZE);
-      strncat (new_url, uri_string (p->text, buf, DEFAULT_BUFFER_SIZE), DEFAULT_BUFFER_SIZE);
+      strncat (new_url, uri_string (p->text, buf, DEFAULT_BUFFER_SIZE), DEFAULT_BUFFER_SIZE-1);
     }
   }
 
-- 
cgit v0.10-9-g596f


From 0f926a3566fb6f3333f3a24e47e2ad204fd0fba4 Mon Sep 17 00:00:00 2001
From: Andreas Baumann <mail@andreasbaumann.cc>
Date: Mon, 8 Mar 2021 19:46:43 +0100
Subject: check_curl: added string_statuscode function for printing HTTP/1.1
 and HTTP/2 correctly


diff --git a/plugins/check_curl.c b/plugins/check_curl.c
index a3f63f1..8f274c2 100644
--- a/plugins/check_curl.c
+++ b/plugins/check_curl.c
@@ -296,6 +296,28 @@ CURLcode sslctxfun(CURL *curl, SSL_CTX *sslctx, void *parm)
 #endif /* USE_OPENSSL */
 #endif /* HAVE_SSL */
 
+/* returns a string "HTTP/1.x" or "HTTP/2" */
+static char *string_statuscode (int major, int minor)
+{
+  static char buf[10];
+
+  switch (major) {
+    case 1:
+      snprintf (buf, sizeof (buf), "HTTP/%d.%d", major, minor);
+      break;
+    case 2:
+    case 3:
+      snprintf (buf, sizeof (buf), "HTTP/%d", major);
+      break;
+    default:
+      /* assuming here HTTP/N with N>=4 */
+      snprintf (buf, sizeof (buf), "HTTP/%d", major);
+      break;
+  }  
+  
+  return buf;
+}
+
 /* Checks if the server 'reply' is one of the expected 'statuscodes' */
 static int
 expected_statuscode (const char *reply, const char *statuscodes)
@@ -746,7 +768,8 @@ GOT_FIRST_CERT:
   if (curlhelp_parse_statusline (header_buf.buf, &status_line) < 0) {
     snprintf (msg, DEFAULT_BUFFER_SIZE, "Unparsable status line in %.3g seconds response time|%s\n",
       total_time, perfstring);
-    die (STATE_CRITICAL, "HTTP CRITICAL HTTP/1.x %ld unknown - %s", code, msg);
+    /* we cannot know the major/minor version here for sure as we cannot parse the first line */
+    die (STATE_CRITICAL, "HTTP CRITICAL HTTP/x.x %ld unknown - %s", code, msg);
   }
 
   /* get result code from cURL */
@@ -823,8 +846,8 @@ GOT_FIRST_CERT:
 
   /* check status codes, set exit status accordingly */
   if( status_line.http_code != code ) {
-    die (STATE_CRITICAL, _("HTTP CRITICAL HTTP/%d.%d %d %s - different HTTP codes (cUrl has %ld)\n"),
-      status_line.http_major, status_line.http_minor,
+    die (STATE_CRITICAL, _("HTTP CRITICAL %s %d %s - different HTTP codes (cUrl has %ld)\n"),
+      string_statuscode (status_line.http_major, status_line.http_minor),
       status_line.http_code, status_line.msg, code);
   }
 
@@ -895,8 +918,8 @@ GOT_FIRST_CERT:
     msg[strlen(msg)-3] = '\0';
 
   /* TODO: separate _() msg and status code: die (result, "HTTP %s: %s\n", state_text(result), msg); */
-  die (result, "HTTP %s: HTTP/%d.%d %d %s%s%s - %d bytes in %.3f second response time %s|%s\n",
-    state_text(result), status_line.http_major, status_line.http_minor,
+  die (result, "HTTP %s: %s %d %s%s%s - %d bytes in %.3f second response time %s|%s\n",
+    state_text(result), string_statuscode (status_line.http_major, status_line.http_minor),
     status_line.http_code, status_line.msg,
     strlen(msg) > 0 ? " - " : "",
     msg, page_len, total_time,
-- 
cgit v0.10-9-g596f