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1/*****************************************************************************
2*
3* Monitoring check_curl plugin
4*
5* License: GPL
6* Copyright (c) 1999-2019 Monitoring Plugins Development Team
7*
8* Description:
9*
10* This file contains the check_curl plugin
11*
12* This plugin tests the HTTP service on the specified host. It can test
13* normal (http) and secure (https) servers, follow redirects, search for
14* strings and regular expressions, check connection times, and report on
15* certificate expiration times.
16*
17* This plugin uses functions from the curl library, see
18* http://curl.haxx.se
19*
20* This program is free software: you can redistribute it and/or modify
21* it under the terms of the GNU General Public License as published by
22* the Free Software Foundation, either version 3 of the License, or
23* (at your option) any later version.
24*
25* This program is distributed in the hope that it will be useful,
26* but WITHOUT ANY WARRANTY; without even the implied warranty of
27* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
28* GNU General Public License for more details.
29*
30* You should have received a copy of the GNU General Public License
31* along with this program. If not, see <http://www.gnu.org/licenses/>.
32*
33*
34*****************************************************************************/
35const char *progname = "check_curl";
36
37const char *copyright = "2006-2019";
38const char *email = "devel@monitoring-plugins.org";
39
40#include <ctype.h>
41
42#include "common.h"
43#include "utils.h"
44
45#ifndef LIBCURL_PROTOCOL_HTTP
46#error libcurl compiled without HTTP support, compiling check_curl plugin does not makes a lot of sense
47#endif
48
49#include "curl/curl.h"
50#include "curl/easy.h"
51
52#include "picohttpparser.h"
53
54#include "uriparser/Uri.h"
55
56#include <arpa/inet.h>
57
58#define MAKE_LIBCURL_VERSION(major, minor, patch) ((major)*0x10000 + (minor)*0x100 + (patch))
59
60#define DEFAULT_BUFFER_SIZE 2048
61#define DEFAULT_SERVER_URL "/"
62#define HTTP_EXPECT "HTTP/"
63#define DEFAULT_MAX_REDIRS 15
64#define INET_ADDR_MAX_SIZE INET6_ADDRSTRLEN
65enum {
66 MAX_IPV4_HOSTLENGTH = 255,
67 HTTP_PORT = 80,
68 HTTPS_PORT = 443,
69 MAX_PORT = 65535
70};
71
72enum {
73 STICKY_NONE = 0,
74 STICKY_HOST = 1,
75 STICKY_PORT = 2
76};
77
78enum {
79 FOLLOW_HTTP_CURL = 0,
80 FOLLOW_LIBCURL = 1
81};
82
83/* for buffers for header and body */
84typedef struct {
85 char *buf;
86 size_t buflen;
87 size_t bufsize;
88} curlhelp_write_curlbuf;
89
90/* for buffering the data sent in PUT */
91typedef struct {
92 char *buf;
93 size_t buflen;
94 off_t pos;
95} curlhelp_read_curlbuf;
96
97/* for parsing the HTTP status line */
98typedef struct {
99 int http_major; /* major version of the protocol, always 1 (HTTP/0.9
100 * never reached the big internet most likely) */
101 int http_minor; /* minor version of the protocol, usually 0 or 1 */
102 int http_code; /* HTTP return code as in RFC 2145 */
103 int http_subcode; /* Microsoft IIS extension, HTTP subcodes, see
104 * http://support.microsoft.com/kb/318380/en-us */
105 const char *msg; /* the human readable message */
106 char *first_line; /* a copy of the first line */
107} curlhelp_statusline;
108
109/* to know the underlying SSL library used by libcurl */
110typedef enum curlhelp_ssl_library {
111 CURLHELP_SSL_LIBRARY_UNKNOWN,
112 CURLHELP_SSL_LIBRARY_OPENSSL,
113 CURLHELP_SSL_LIBRARY_LIBRESSL,
114 CURLHELP_SSL_LIBRARY_GNUTLS,
115 CURLHELP_SSL_LIBRARY_NSS
116} curlhelp_ssl_library;
117
118enum {
119 REGS = 2,
120 MAX_RE_SIZE = 256
121};
122#include "regex.h"
123regex_t preg;
124regmatch_t pmatch[REGS];
125char regexp[MAX_RE_SIZE];
126int cflags = REG_NOSUB | REG_EXTENDED | REG_NEWLINE;
127int errcode;
128int invert_regex = 0;
129
130char *server_address;
131char *host_name;
132char *server_url = 0;
133char server_ip[DEFAULT_BUFFER_SIZE];
134struct curl_slist *server_ips = NULL;
135int specify_port = FALSE;
136unsigned short server_port = HTTP_PORT;
137unsigned short virtual_port = 0;
138int host_name_length;
139char output_header_search[30] = "";
140char output_string_search[30] = "";
141char *warning_thresholds = NULL;
142char *critical_thresholds = NULL;
143int days_till_exp_warn, days_till_exp_crit;
144thresholds *thlds;
145char user_agent[DEFAULT_BUFFER_SIZE];
146int verbose = 0;
147int show_extended_perfdata = FALSE;
148int min_page_len = 0;
149int max_page_len = 0;
150int redir_depth = 0;
151int max_depth = DEFAULT_MAX_REDIRS;
152char *http_method = NULL;
153char *http_post_data = NULL;
154char *http_content_type = NULL;
155CURL *curl;
156struct curl_slist *header_list = NULL;
157curlhelp_write_curlbuf body_buf;
158curlhelp_write_curlbuf header_buf;
159curlhelp_statusline status_line;
160curlhelp_read_curlbuf put_buf;
161char http_header[DEFAULT_BUFFER_SIZE];
162long code;
163long socket_timeout = DEFAULT_SOCKET_TIMEOUT;
164double total_time;
165double time_connect;
166double time_appconnect;
167double time_headers;
168double time_firstbyte;
169char errbuf[CURL_ERROR_SIZE+1];
170CURLcode res;
171char url[DEFAULT_BUFFER_SIZE];
172char msg[DEFAULT_BUFFER_SIZE];
173char perfstring[DEFAULT_BUFFER_SIZE];
174char header_expect[MAX_INPUT_BUFFER] = "";
175char string_expect[MAX_INPUT_BUFFER] = "";
176char server_expect[MAX_INPUT_BUFFER] = HTTP_EXPECT;
177int server_expect_yn = 0;
178char user_auth[MAX_INPUT_BUFFER] = "";
179char proxy_auth[MAX_INPUT_BUFFER] = "";
180char **http_opt_headers;
181int http_opt_headers_count = 0;
182int display_html = FALSE;
183int onredirect = STATE_OK;
184int followmethod = FOLLOW_HTTP_CURL;
185int followsticky = STICKY_NONE;
186int use_ssl = FALSE;
187int use_sni = TRUE;
188int check_cert = FALSE;
189typedef union {
190 struct curl_slist* to_info;
191 struct curl_certinfo* to_certinfo;
192} cert_ptr_union;
193cert_ptr_union cert_ptr;
194int ssl_version = CURL_SSLVERSION_DEFAULT;
195char *client_cert = NULL;
196char *client_privkey = NULL;
197char *ca_cert = NULL;
198int is_openssl_callback = FALSE;
199#if defined(HAVE_SSL) && defined(USE_OPENSSL)
200X509 *cert = NULL;
201#endif /* defined(HAVE_SSL) && defined(USE_OPENSSL) */
202int no_body = FALSE;
203int maximum_age = -1;
204int address_family = AF_UNSPEC;
205curlhelp_ssl_library ssl_library = CURLHELP_SSL_LIBRARY_UNKNOWN;
206int curl_http_version = CURL_HTTP_VERSION_NONE;
207
208int process_arguments (int, char**);
209void handle_curl_option_return_code (CURLcode res, const char* option);
210int check_http (void);
211void redir (curlhelp_write_curlbuf*);
212char *perfd_time (double microsec);
213char *perfd_time_connect (double microsec);
214char *perfd_time_ssl (double microsec);
215char *perfd_time_firstbyte (double microsec);
216char *perfd_time_headers (double microsec);
217char *perfd_time_transfer (double microsec);
218char *perfd_size (int page_len);
219void print_help (void);
220void print_usage (void);
221void print_curl_version (void);
222int curlhelp_initwritebuffer (curlhelp_write_curlbuf*);
223int curlhelp_buffer_write_callback (void*, size_t , size_t , void*);
224void curlhelp_freewritebuffer (curlhelp_write_curlbuf*);
225int curlhelp_initreadbuffer (curlhelp_read_curlbuf *, const char *, size_t);
226int curlhelp_buffer_read_callback (void *, size_t , size_t , void *);
227void curlhelp_freereadbuffer (curlhelp_read_curlbuf *);
228curlhelp_ssl_library curlhelp_get_ssl_library (CURL*);
229const char* curlhelp_get_ssl_library_string (curlhelp_ssl_library);
230int net_noopenssl_check_certificate (cert_ptr_union*, int, int);
231
232int curlhelp_parse_statusline (const char*, curlhelp_statusline *);
233void curlhelp_free_statusline (curlhelp_statusline *);
234char *get_header_value (const struct phr_header* headers, const size_t nof_headers, const char* header);
235int check_document_dates (const curlhelp_write_curlbuf *, char (*msg)[DEFAULT_BUFFER_SIZE]);
236int get_content_length (const curlhelp_write_curlbuf* header_buf, const curlhelp_write_curlbuf* body_buf);
237
238#if defined(HAVE_SSL) && defined(USE_OPENSSL)
239int np_net_ssl_check_certificate(X509 *certificate, int days_till_exp_warn, int days_till_exp_crit);
240#endif /* defined(HAVE_SSL) && defined(USE_OPENSSL) */
241
242void remove_newlines (char *);
243void test_file (char *);
244
245int
246main (int argc, char **argv)
247{
248 int result = STATE_UNKNOWN;
249
250 setlocale (LC_ALL, "");
251 bindtextdomain (PACKAGE, LOCALEDIR);
252 textdomain (PACKAGE);
253
254 /* Parse extra opts if any */
255 argv = np_extra_opts (&argc, argv, progname);
256
257 /* set defaults */
258 snprintf( user_agent, DEFAULT_BUFFER_SIZE, "%s/v%s (monitoring-plugins %s, %s)",
259 progname, NP_VERSION, VERSION, curl_version());
260
261 /* parse arguments */
262 if (process_arguments (argc, argv) == ERROR)
263 usage4 (_("Could not parse arguments"));
264
265 if (display_html == TRUE)
266 printf ("<A HREF=\"%s://%s:%d%s\" target=\"_blank\">",
267 use_ssl ? "https" : "http",
268 host_name ? host_name : server_address,
269 virtual_port ? virtual_port : server_port,
270 server_url);
271
272 result = check_http ();
273 return result;
274}
275
276#ifdef HAVE_SSL
277#ifdef USE_OPENSSL
278
279int verify_callback(int preverify_ok, X509_STORE_CTX *x509_ctx)
280{
281 /* TODO: we get all certificates of the chain, so which ones
282 * should we test?
283 * TODO: is the last certificate always the server certificate?
284 */
285 cert = X509_STORE_CTX_get_current_cert(x509_ctx);
286 return 1;
287}
288
289CURLcode sslctxfun(CURL *curl, SSL_CTX *sslctx, void *parm)
290{
291 SSL_CTX_set_verify(sslctx, SSL_VERIFY_PEER, verify_callback);
292
293 return CURLE_OK;
294}
295
296#endif /* USE_OPENSSL */
297#endif /* HAVE_SSL */
298
299/* Checks if the server 'reply' is one of the expected 'statuscodes' */
300static int
301expected_statuscode (const char *reply, const char *statuscodes)
302{
303 char *expected, *code;
304 int result = 0;
305
306 if ((expected = strdup (statuscodes)) == NULL)
307 die (STATE_UNKNOWN, _("HTTP UNKNOWN - Memory allocation error\n"));
308
309 for (code = strtok (expected, ","); code != NULL; code = strtok (NULL, ","))
310 if (strstr (reply, code) != NULL) {
311 result = 1;
312 break;
313 }
314
315 free (expected);
316 return result;
317}
318
319void
320handle_curl_option_return_code (CURLcode res, const char* option)
321{
322 if (res != CURLE_OK) {
323 snprintf (msg, DEFAULT_BUFFER_SIZE, _("Error while setting cURL option '%s': cURL returned %d - %s"),
324 option, res, curl_easy_strerror(res));
325 die (STATE_CRITICAL, "HTTP CRITICAL - %s\n", msg);
326 }
327}
328
329int
330check_http (void)
331{
332 int result = STATE_OK;
333 int page_len = 0;
334 int i;
335 char *force_host_header = NULL;
336
337 /* initialize curl */
338 if (curl_global_init (CURL_GLOBAL_DEFAULT) != CURLE_OK)
339 die (STATE_UNKNOWN, "HTTP UNKNOWN - curl_global_init failed\n");
340
341 if ((curl = curl_easy_init()) == NULL)
342 die (STATE_UNKNOWN, "HTTP UNKNOWN - curl_easy_init failed\n");
343
344 if (verbose >= 1)
345 handle_curl_option_return_code (curl_easy_setopt (curl, CURLOPT_VERBOSE, TRUE), "CURLOPT_VERBOSE");
346
347 /* print everything on stdout like check_http would do */
348 handle_curl_option_return_code (curl_easy_setopt(curl, CURLOPT_STDERR, stdout), "CURLOPT_STDERR");
349
350 /* initialize buffer for body of the answer */
351 if (curlhelp_initwritebuffer(&body_buf) < 0)
352 die (STATE_UNKNOWN, "HTTP CRITICAL - out of memory allocating buffer for body\n");
353 handle_curl_option_return_code (curl_easy_setopt (curl, CURLOPT_WRITEFUNCTION, (curl_write_callback)curlhelp_buffer_write_callback), "CURLOPT_WRITEFUNCTION");
354 handle_curl_option_return_code (curl_easy_setopt (curl, CURLOPT_WRITEDATA, (void *)&body_buf), "CURLOPT_WRITEDATA");
355
356 /* initialize buffer for header of the answer */
357 if (curlhelp_initwritebuffer( &header_buf ) < 0)
358 die (STATE_UNKNOWN, "HTTP CRITICAL - out of memory allocating buffer for header\n" );
359 handle_curl_option_return_code (curl_easy_setopt (curl, CURLOPT_HEADERFUNCTION, (curl_write_callback)curlhelp_buffer_write_callback), "CURLOPT_HEADERFUNCTION");
360 handle_curl_option_return_code (curl_easy_setopt (curl, CURLOPT_WRITEHEADER, (void *)&header_buf), "CURLOPT_WRITEHEADER");
361
362 /* set the error buffer */
363 handle_curl_option_return_code (curl_easy_setopt (curl, CURLOPT_ERRORBUFFER, errbuf), "CURLOPT_ERRORBUFFER");
364
365 /* set timeouts */
366 handle_curl_option_return_code (curl_easy_setopt (curl, CURLOPT_CONNECTTIMEOUT, socket_timeout), "CURLOPT_CONNECTTIMEOUT");
367 handle_curl_option_return_code (curl_easy_setopt (curl, CURLOPT_TIMEOUT, socket_timeout), "CURLOPT_TIMEOUT");
368
369 /* compose URL: use the address we want to connect to, set Host: header later */
370 snprintf (url, DEFAULT_BUFFER_SIZE, "%s://%s:%d%s",
371 use_ssl ? "https" : "http",
372 use_ssl ? host_name : server_address,
373 server_port,
374 server_url
375 );
376
377 if (verbose>=1)
378 printf ("* curl CURLOPT_URL: %s\n", url);
379 handle_curl_option_return_code (curl_easy_setopt (curl, CURLOPT_URL, url), "CURLOPT_URL");
380
381 /* extract proxy information for legacy proxy https requests */
382 if (!strcmp(http_method, "CONNECT") || strstr(server_url, "http") == server_url) {
383 handle_curl_option_return_code (curl_easy_setopt (curl, CURLOPT_PROXY, server_address), "CURLOPT_PROXY");
384 handle_curl_option_return_code (curl_easy_setopt (curl, CURLOPT_PROXYPORT, (long)server_port), "CURLOPT_PROXYPORT");
385 if (verbose>=2)
386 printf ("* curl CURLOPT_PROXY: %s:%d\n", server_address, server_port);
387 http_method = "GET";
388 handle_curl_option_return_code (curl_easy_setopt (curl, CURLOPT_URL, server_url), "CURLOPT_URL");
389 }
390
391 /* disable body for HEAD request */
392 if (http_method && !strcmp (http_method, "HEAD" )) {
393 no_body = TRUE;
394 }
395
396 /* set HTTP protocol version */
397 handle_curl_option_return_code (curl_easy_setopt (curl, CURLOPT_HTTP_VERSION, curl_http_version), "CURLOPT_HTTP_VERSION");
398
399 /* set HTTP method */
400 if (http_method) {
401 if (!strcmp(http_method, "POST"))
402 handle_curl_option_return_code (curl_easy_setopt (curl, CURLOPT_POST, 1), "CURLOPT_POST");
403 else if (!strcmp(http_method, "PUT"))
404 handle_curl_option_return_code (curl_easy_setopt (curl, CURLOPT_UPLOAD, 1), "CURLOPT_UPLOAD");
405 else
406 handle_curl_option_return_code (curl_easy_setopt (curl, CURLOPT_CUSTOMREQUEST, http_method), "CURLOPT_CUSTOMREQUEST");
407 }
408
409 /* check if Host header is explicitly set in options */
410 if (http_opt_headers_count) {
411 for (i = 0; i < http_opt_headers_count ; i++) {
412 if (strncmp(http_opt_headers[i], "Host:", 5) == 0) {
413 force_host_header = http_opt_headers[i];
414 }
415 }
416 }
417
418 /* set hostname (virtual hosts), not needed if CURLOPT_CONNECT_TO is used, but left in anyway */
419 if(host_name != NULL && force_host_header == NULL) {
420 if((virtual_port != HTTP_PORT && !use_ssl) || (virtual_port != HTTPS_PORT && use_ssl)) {
421 snprintf(http_header, DEFAULT_BUFFER_SIZE, "Host: %s:%d", host_name, virtual_port);
422 } else {
423 snprintf(http_header, DEFAULT_BUFFER_SIZE, "Host: %s", host_name);
424 }
425 header_list = curl_slist_append (header_list, http_header);
426 }
427
428 /* always close connection, be nice to servers */
429 snprintf (http_header, DEFAULT_BUFFER_SIZE, "Connection: close");
430 header_list = curl_slist_append (header_list, http_header);
431
432 /* attach additional headers supplied by the user */
433 /* optionally send any other header tag */
434 if (http_opt_headers_count) {
435 for (i = 0; i < http_opt_headers_count ; i++) {
436 header_list = curl_slist_append (header_list, http_opt_headers[i]);
437 }
438 /* This cannot be free'd here because a redirection will then try to access this and segfault */
439 /* Covered in a testcase in tests/check_http.t */
440 /* free(http_opt_headers); */
441 }
442
443 /* set HTTP headers */
444 handle_curl_option_return_code (curl_easy_setopt( curl, CURLOPT_HTTPHEADER, header_list ), "CURLOPT_HTTPHEADER");
445
446#ifdef LIBCURL_FEATURE_SSL
447
448 /* set SSL version, warn about unsecure or unsupported versions */
449 if (use_ssl) {
450 handle_curl_option_return_code (curl_easy_setopt (curl, CURLOPT_SSLVERSION, ssl_version), "CURLOPT_SSLVERSION");
451 }
452
453 /* client certificate and key to present to server (SSL) */
454 if (client_cert)
455 handle_curl_option_return_code (curl_easy_setopt (curl, CURLOPT_SSLCERT, client_cert), "CURLOPT_SSLCERT");
456 if (client_privkey)
457 handle_curl_option_return_code (curl_easy_setopt (curl, CURLOPT_SSLKEY, client_privkey), "CURLOPT_SSLKEY");
458 if (ca_cert) {
459 /* per default if we have a CA verify both the peer and the
460 * hostname in the certificate, can be switched off later */
461 handle_curl_option_return_code (curl_easy_setopt (curl, CURLOPT_CAINFO, ca_cert), "CURLOPT_CAINFO");
462 handle_curl_option_return_code (curl_easy_setopt( curl, CURLOPT_SSL_VERIFYPEER, 1), "CURLOPT_SSL_VERIFYPEER");
463 handle_curl_option_return_code (curl_easy_setopt( curl, CURLOPT_SSL_VERIFYHOST, 2), "CURLOPT_SSL_VERIFYHOST");
464 } else {
465 /* backward-compatible behaviour, be tolerant in checks
466 * TODO: depending on more options have aspects we want
467 * to be less tolerant about ssl verfications
468 */
469 handle_curl_option_return_code (curl_easy_setopt (curl, CURLOPT_SSL_VERIFYPEER, 0), "CURLOPT_SSL_VERIFYPEER");
470 handle_curl_option_return_code (curl_easy_setopt (curl, CURLOPT_SSL_VERIFYHOST, 0), "CURLOPT_SSL_VERIFYHOST");
471 }
472
473 /* detect SSL library used by libcurl */
474 ssl_library = curlhelp_get_ssl_library (curl);
475
476 /* try hard to get a stack of certificates to verify against */
477 if (check_cert) {
478#if LIBCURL_VERSION_NUM >= MAKE_LIBCURL_VERSION(7, 19, 1)
479 /* inform curl to report back certificates */
480 switch (ssl_library) {
481 case CURLHELP_SSL_LIBRARY_OPENSSL:
482 case CURLHELP_SSL_LIBRARY_LIBRESSL:
483 /* set callback to extract certificate with OpenSSL context function (works with
484 * OpenSSL-style libraries only!) */
485#ifdef USE_OPENSSL
486 /* libcurl and monitoring plugins built with OpenSSL, good */
487 handle_curl_option_return_code (curl_easy_setopt(curl, CURLOPT_SSL_CTX_FUNCTION, sslctxfun), "CURLOPT_SSL_CTX_FUNCTION");
488 is_openssl_callback = TRUE;
489#else /* USE_OPENSSL */
490#endif /* USE_OPENSSL */
491 /* libcurl is built with OpenSSL, monitoring plugins, so falling
492 * back to manually extracting certificate information */
493 handle_curl_option_return_code (curl_easy_setopt (curl, CURLOPT_CERTINFO, 1L), "CURLOPT_CERTINFO");
494 break;
495
496 case CURLHELP_SSL_LIBRARY_NSS:
497#if LIBCURL_VERSION_NUM >= MAKE_LIBCURL_VERSION(7, 34, 0)
498 /* NSS: support for CERTINFO is implemented since 7.34.0 */
499 handle_curl_option_return_code (curl_easy_setopt (curl, CURLOPT_CERTINFO, 1L), "CURLOPT_CERTINFO");
500#else /* LIBCURL_VERSION_NUM >= MAKE_LIBCURL_VERSION(7, 34, 0) */
501 die (STATE_CRITICAL, "HTTP CRITICAL - Cannot retrieve certificates (libcurl linked with SSL library '%s' is too old)\n", curlhelp_get_ssl_library_string (ssl_library));
502#endif /* LIBCURL_VERSION_NUM >= MAKE_LIBCURL_VERSION(7, 34, 0) */
503 break;
504
505 case CURLHELP_SSL_LIBRARY_GNUTLS:
506#if LIBCURL_VERSION_NUM >= MAKE_LIBCURL_VERSION(7, 42, 0)
507 /* GnuTLS: support for CERTINFO is implemented since 7.42.0 */
508 handle_curl_option_return_code (curl_easy_setopt (curl, CURLOPT_CERTINFO, 1L), "CURLOPT_CERTINFO");
509#else /* LIBCURL_VERSION_NUM >= MAKE_LIBCURL_VERSION(7, 42, 0) */
510 die (STATE_CRITICAL, "HTTP CRITICAL - Cannot retrieve certificates (libcurl linked with SSL library '%s' is too old)\n", curlhelp_get_ssl_library_string (ssl_library));
511#endif /* LIBCURL_VERSION_NUM >= MAKE_LIBCURL_VERSION(7, 42, 0) */
512 break;
513
514 case CURLHELP_SSL_LIBRARY_UNKNOWN:
515 default:
516 die (STATE_CRITICAL, "HTTP CRITICAL - Cannot retrieve certificates (unknown SSL library '%s', must implement first)\n", curlhelp_get_ssl_library_string (ssl_library));
517 break;
518 }
519#else /* LIBCURL_VERSION_NUM >= MAKE_LIBCURL_VERSION(7, 19, 1) */
520 /* old libcurl, our only hope is OpenSSL, otherwise we are out of luck */
521 if (ssl_library == CURLHELP_SSL_LIBRARY_OPENSSL || ssl_library == CURLHELP_SSL_LIBRARY_LIBRESSL)
522 handle_curl_option_return_code (curl_easy_setopt(curl, CURLOPT_SSL_CTX_FUNCTION, sslctxfun), "CURLOPT_SSL_CTX_FUNCTION");
523 else
524 die (STATE_CRITICAL, "HTTP CRITICAL - Cannot retrieve certificates (no CURLOPT_SSL_CTX_FUNCTION, no OpenSSL library or libcurl too old and has no CURLOPT_CERTINFO)\n");
525#endif /* LIBCURL_VERSION_NUM >= MAKE_LIBCURL_VERSION(7, 19, 1) */
526 }
527
528#endif /* LIBCURL_FEATURE_SSL */
529
530 /* set default or user-given user agent identification */
531 handle_curl_option_return_code (curl_easy_setopt (curl, CURLOPT_USERAGENT, user_agent), "CURLOPT_USERAGENT");
532
533 /* proxy-authentication */
534 if (strcmp(proxy_auth, ""))
535 handle_curl_option_return_code (curl_easy_setopt (curl, CURLOPT_PROXYUSERPWD, proxy_auth), "CURLOPT_PROXYUSERPWD");
536
537 /* authentication */
538 if (strcmp(user_auth, ""))
539 handle_curl_option_return_code (curl_easy_setopt (curl, CURLOPT_USERPWD, user_auth), "CURLOPT_USERPWD");
540
541 /* TODO: parameter auth method, bitfield of following methods:
542 * CURLAUTH_BASIC (default)
543 * CURLAUTH_DIGEST
544 * CURLAUTH_DIGEST_IE
545 * CURLAUTH_NEGOTIATE
546 * CURLAUTH_NTLM
547 * CURLAUTH_NTLM_WB
548 *
549 * convenience tokens for typical sets of methods:
550 * CURLAUTH_ANYSAFE: most secure, without BASIC
551 * or CURLAUTH_ANY: most secure, even BASIC if necessary
552 *
553 * handle_curl_option_return_code (curl_easy_setopt( curl, CURLOPT_HTTPAUTH, (long)CURLAUTH_DIGEST ), "CURLOPT_HTTPAUTH");
554 */
555
556 /* handle redirections */
557 if (onredirect == STATE_DEPENDENT) {
558 if( followmethod == FOLLOW_LIBCURL ) {
559 handle_curl_option_return_code (curl_easy_setopt (curl, CURLOPT_FOLLOWLOCATION, 1), "CURLOPT_FOLLOWLOCATION");
560
561 /* default -1 is infinite, not good, could lead to zombie plugins!
562 Setting it to one bigger than maximal limit to handle errors nicely below
563 */
564 handle_curl_option_return_code (curl_easy_setopt (curl, CURLOPT_MAXREDIRS, max_depth+1), "CURLOPT_MAXREDIRS");
565
566 /* for now allow only http and https (we are a http(s) check plugin in the end) */
567#if LIBCURL_VERSION_NUM >= MAKE_LIBCURL_VERSION(7, 19, 4)
568 handle_curl_option_return_code (curl_easy_setopt (curl, CURLOPT_REDIR_PROTOCOLS, CURLPROTO_HTTP | CURLPROTO_HTTPS), "CURLOPT_REDIRECT_PROTOCOLS");
569#endif /* LIBCURL_VERSION_NUM >= MAKE_LIBCURL_VERSION(7, 19, 4) */
570
571 /* TODO: handle the following aspects of redirection, make them
572 * command line options too later:
573 CURLOPT_POSTREDIR: method switch
574 CURLINFO_REDIRECT_URL: custom redirect option
575 CURLOPT_REDIRECT_PROTOCOLS: allow people to step outside safe protocols
576 CURLINFO_REDIRECT_COUNT: get the number of redirects, print it, maybe a range option here is nice like for expected page size?
577 */
578 } else {
579 /* old style redirection is handled below */
580 }
581 }
582
583 /* no-body */
584 if (no_body)
585 handle_curl_option_return_code (curl_easy_setopt (curl, CURLOPT_NOBODY, 1), "CURLOPT_NOBODY");
586
587 /* IPv4 or IPv6 forced DNS resolution */
588 if (address_family == AF_UNSPEC)
589 handle_curl_option_return_code (curl_easy_setopt (curl, CURLOPT_IPRESOLVE, CURL_IPRESOLVE_WHATEVER), "CURLOPT_IPRESOLVE(CURL_IPRESOLVE_WHATEVER)");
590 else if (address_family == AF_INET)
591 handle_curl_option_return_code (curl_easy_setopt (curl, CURLOPT_IPRESOLVE, CURL_IPRESOLVE_V4), "CURLOPT_IPRESOLVE(CURL_IPRESOLVE_V4)");
592#if defined (USE_IPV6) && defined (LIBCURL_FEATURE_IPV6)
593 else if (address_family == AF_INET6)
594 handle_curl_option_return_code (curl_easy_setopt (curl, CURLOPT_IPRESOLVE, CURL_IPRESOLVE_V6), "CURLOPT_IPRESOLVE(CURL_IPRESOLVE_V6)");
595#endif
596
597 /* either send http POST data (any data, not only POST)*/
598 if (!strcmp(http_method, "POST") ||!strcmp(http_method, "PUT")) {
599 /* set content of payload for POST and PUT */
600 if (http_content_type) {
601 snprintf (http_header, DEFAULT_BUFFER_SIZE, "Content-Type: %s", http_content_type);
602 header_list = curl_slist_append (header_list, http_header);
603 }
604 /* NULL indicates "HTTP Continue" in libcurl, provide an empty string
605 * in case of no POST/PUT data */
606 if (!http_post_data)
607 http_post_data = "";
608 if (!strcmp(http_method, "POST")) {
609 /* POST method, set payload with CURLOPT_POSTFIELDS */
610 handle_curl_option_return_code (curl_easy_setopt (curl, CURLOPT_POSTFIELDS, http_post_data), "CURLOPT_POSTFIELDS");
611 } else if (!strcmp(http_method, "PUT")) {
612 handle_curl_option_return_code (curl_easy_setopt (curl, CURLOPT_READFUNCTION, (curl_read_callback)curlhelp_buffer_read_callback), "CURLOPT_READFUNCTION");
613 curlhelp_initreadbuffer (&put_buf, http_post_data, strlen (http_post_data));
614 handle_curl_option_return_code (curl_easy_setopt (curl, CURLOPT_READDATA, (void *)&put_buf), "CURLOPT_READDATA");
615 handle_curl_option_return_code (curl_easy_setopt (curl, CURLOPT_INFILESIZE, (curl_off_t)strlen (http_post_data)), "CURLOPT_INFILESIZE");
616 }
617 }
618
619 /* do the request */
620 res = curl_easy_perform(curl);
621
622 if (verbose>=2 && http_post_data)
623 printf ("**** REQUEST CONTENT ****\n%s\n", http_post_data);
624
625 /* free header and server IP resolve lists, we don't need it anymore */
626 curl_slist_free_all (header_list); header_list = NULL;
627 curl_slist_free_all (server_ips); server_ips = NULL;
628
629 /* Curl errors, result in critical Nagios state */
630 if (res != CURLE_OK) {
631 snprintf (msg, DEFAULT_BUFFER_SIZE, _("Invalid HTTP response received from host on port %d: cURL returned %d - %s"),
632 server_port, res, curl_easy_strerror(res));
633 die (STATE_CRITICAL, "HTTP CRITICAL - %s\n", msg);
634 }
635
636 /* certificate checks */
637#ifdef LIBCURL_FEATURE_SSL
638 if (use_ssl == TRUE) {
639 if (check_cert == TRUE) {
640 if (is_openssl_callback) {
641#ifdef USE_OPENSSL
642 /* check certificate with OpenSSL functions, curl has been built against OpenSSL
643 * and we actually have OpenSSL in the monitoring tools
644 */
645 result = np_net_ssl_check_certificate(cert, days_till_exp_warn, days_till_exp_crit);
646 return result;
647#else /* USE_OPENSSL */
648 die (STATE_CRITICAL, "HTTP CRITICAL - Cannot retrieve certificates - OpenSSL callback used and not linked against OpenSSL\n");
649#endif /* USE_OPENSSL */
650 } else {
651 int i;
652 struct curl_slist *slist;
653
654 cert_ptr.to_info = NULL;
655 res = curl_easy_getinfo (curl, CURLINFO_CERTINFO, &cert_ptr.to_info);
656 if (!res && cert_ptr.to_info) {
657#ifdef USE_OPENSSL
658 /* We have no OpenSSL in libcurl, but we can use OpenSSL for X509 cert parsing
659 * We only check the first certificate and assume it's the one of the server
660 */
661 const char* raw_cert = NULL;
662 for (i = 0; i < cert_ptr.to_certinfo->num_of_certs; i++) {
663 for (slist = cert_ptr.to_certinfo->certinfo[i]; slist; slist = slist->next) {
664 if (verbose >= 2)
665 printf ("%d ** %s\n", i, slist->data);
666 if (strncmp (slist->data, "Cert:", 5) == 0) {
667 raw_cert = &slist->data[5];
668 goto GOT_FIRST_CERT;
669 }
670 }
671 }
672GOT_FIRST_CERT:
673 if (!raw_cert) {
674 snprintf (msg, DEFAULT_BUFFER_SIZE, _("Cannot retrieve certificates from CERTINFO information - certificate data was empty"));
675 die (STATE_CRITICAL, "HTTP CRITICAL - %s\n", msg);
676 }
677 BIO* cert_BIO = BIO_new (BIO_s_mem());
678 BIO_write (cert_BIO, raw_cert, strlen(raw_cert));
679 cert = PEM_read_bio_X509 (cert_BIO, NULL, NULL, NULL);
680 if (!cert) {
681 snprintf (msg, DEFAULT_BUFFER_SIZE, _("Cannot read certificate from CERTINFO information - BIO error"));
682 die (STATE_CRITICAL, "HTTP CRITICAL - %s\n", msg);
683 }
684 BIO_free (cert_BIO);
685 result = np_net_ssl_check_certificate(cert, days_till_exp_warn, days_till_exp_crit);
686 return result;
687#else /* USE_OPENSSL */
688 /* We assume we don't have OpenSSL and np_net_ssl_check_certificate at our disposal,
689 * so we use the libcurl CURLINFO data
690 */
691 result = net_noopenssl_check_certificate(&cert_ptr, days_till_exp_warn, days_till_exp_crit);
692 return result;
693#endif /* USE_OPENSSL */
694 } else {
695 snprintf (msg, DEFAULT_BUFFER_SIZE, _("Cannot retrieve certificates - cURL returned %d - %s"),
696 res, curl_easy_strerror(res));
697 die (STATE_CRITICAL, "HTTP CRITICAL - %s\n", msg);
698 }
699 }
700 }
701 }
702#endif /* LIBCURL_FEATURE_SSL */
703
704 /* we got the data and we executed the request in a given time, so we can append
705 * performance data to the answer always
706 */
707 handle_curl_option_return_code (curl_easy_getinfo (curl, CURLINFO_TOTAL_TIME, &total_time), "CURLINFO_TOTAL_TIME");
708 page_len = get_content_length(&header_buf, &body_buf);
709 if(show_extended_perfdata) {
710 handle_curl_option_return_code (curl_easy_getinfo(curl, CURLINFO_CONNECT_TIME, &time_connect), "CURLINFO_CONNECT_TIME");
711 handle_curl_option_return_code (curl_easy_getinfo(curl, CURLINFO_APPCONNECT_TIME, &time_appconnect), "CURLINFO_APPCONNECT_TIME");
712 handle_curl_option_return_code (curl_easy_getinfo(curl, CURLINFO_PRETRANSFER_TIME, &time_headers), "CURLINFO_PRETRANSFER_TIME");
713 handle_curl_option_return_code (curl_easy_getinfo(curl, CURLINFO_STARTTRANSFER_TIME, &time_firstbyte), "CURLINFO_STARTTRANSFER_TIME");
714 snprintf(perfstring, DEFAULT_BUFFER_SIZE, "%s %s %s %s %s %s %s",
715 perfd_time(total_time),
716 perfd_size(page_len),
717 perfd_time_connect(time_connect),
718 use_ssl == TRUE ? perfd_time_ssl (time_appconnect-time_connect) : "",
719 perfd_time_headers(time_headers - time_appconnect),
720 perfd_time_firstbyte(time_firstbyte - time_headers),
721 perfd_time_transfer(total_time-time_firstbyte)
722 );
723 } else {
724 snprintf(perfstring, DEFAULT_BUFFER_SIZE, "%s %s",
725 perfd_time(total_time),
726 perfd_size(page_len)
727 );
728 }
729
730 /* return a CRITICAL status if we couldn't read any data */
731 if (strlen(header_buf.buf) == 0 && strlen(body_buf.buf) == 0)
732 die (STATE_CRITICAL, _("HTTP CRITICAL - No header received from host\n"));
733
734 /* get status line of answer, check sanity of HTTP code */
735 if (curlhelp_parse_statusline (header_buf.buf, &status_line) < 0) {
736 snprintf (msg, DEFAULT_BUFFER_SIZE, "Unparsable status line in %.3g seconds response time|%s\n",
737 total_time, perfstring);
738 die (STATE_CRITICAL, "HTTP CRITICAL HTTP/1.x %ld unknown - %s", code, msg);
739 }
740
741 /* get result code from cURL */
742 handle_curl_option_return_code (curl_easy_getinfo (curl, CURLINFO_RESPONSE_CODE, &code), "CURLINFO_RESPONSE_CODE");
743 if (verbose>=2)
744 printf ("* curl CURLINFO_RESPONSE_CODE is %ld\n", code);
745
746 /* print status line, header, body if verbose */
747 if (verbose >= 2) {
748 printf ("**** HEADER ****\n%s\n**** CONTENT ****\n%s\n", header_buf.buf,
749 (no_body ? " [[ skipped ]]" : body_buf.buf));
750 }
751
752 /* make sure the status line matches the response we are looking for */
753 if (!expected_statuscode(status_line.first_line, server_expect)) {
754 if (server_port == HTTP_PORT)
755 snprintf(msg, DEFAULT_BUFFER_SIZE, _("Invalid HTTP response received from host: %s\n"), status_line.first_line);
756 else
757 snprintf(msg, DEFAULT_BUFFER_SIZE, _("Invalid HTTP response received from host on port %d: %s\n"), server_port, status_line.first_line);
758 die (STATE_CRITICAL, "HTTP CRITICAL - %s", msg);
759 }
760
761 if( server_expect_yn ) {
762 snprintf(msg, DEFAULT_BUFFER_SIZE, _("Status line output matched \"%s\" - "), server_expect);
763 if (verbose)
764 printf ("%s\n",msg);
765 result = STATE_OK;
766 }
767 else {
768 /* illegal return codes result in a critical state */
769 if (code >= 600 || code < 100) {
770 die (STATE_CRITICAL, _("HTTP CRITICAL: Invalid Status (%d, %.40s)\n"), status_line.http_code, status_line.msg);
771 /* server errors result in a critical state */
772 } else if (code >= 500) {
773 result = STATE_CRITICAL;
774 /* client errors result in a warning state */
775 } else if (code >= 400) {
776 result = STATE_WARNING;
777 /* check redirected page if specified */
778 } else if (code >= 300) {
779 if (onredirect == STATE_DEPENDENT) {
780 if( followmethod == FOLLOW_LIBCURL ) {
781 code = status_line.http_code;
782 } else {
783 /* old check_http style redirection, if we come
784 * back here, we are in the same status as with
785 * the libcurl method
786 */
787 redir (&header_buf);
788 }
789 } else {
790 /* this is a specific code in the command line to
791 * be returned when a redirection is encoutered
792 */
793 }
794 result = max_state_alt (onredirect, result);
795 /* all other codes are considered ok */
796 } else {
797 result = STATE_OK;
798 }
799 }
800
801 /* libcurl redirection internally, handle error states here */
802 if( followmethod == FOLLOW_LIBCURL ) {
803 handle_curl_option_return_code (curl_easy_getinfo (curl, CURLINFO_REDIRECT_COUNT, &redir_depth), "CURLINFO_REDIRECT_COUNT");
804 if (verbose >= 2)
805 printf(_("* curl LIBINFO_REDIRECT_COUNT is %d\n"), redir_depth);
806 if (redir_depth > max_depth) {
807 snprintf (msg, DEFAULT_BUFFER_SIZE, "maximum redirection depth %d exceeded in libcurl",
808 max_depth);
809 die (STATE_WARNING, "HTTP WARNING - %s", msg);
810 }
811 }
812
813 /* check status codes, set exit status accordingly */
814 if( status_line.http_code != code ) {
815 die (STATE_CRITICAL, _("HTTP CRITICAL HTTP/%d.%d %d %s - different HTTP codes (cUrl has %ld)\n"),
816 status_line.http_major, status_line.http_minor,
817 status_line.http_code, status_line.msg, code);
818 }
819
820 if (maximum_age >= 0) {
821 result = max_state_alt(check_document_dates(&header_buf, &msg), result);
822 }
823
824 /* Page and Header content checks go here */
825
826 if (strlen (header_expect)) {
827 if (!strstr (header_buf.buf, header_expect)) {
828 strncpy(&output_header_search[0],header_expect,sizeof(output_header_search));
829 if(output_header_search[sizeof(output_header_search)-1]!='\0') {
830 bcopy("...",&output_header_search[sizeof(output_header_search)-4],4);
831 }
832 snprintf (msg, DEFAULT_BUFFER_SIZE, _("%sheader '%s' not found on '%s://%s:%d%s', "), msg, output_header_search, use_ssl ? "https" : "http", host_name ? host_name : server_address, server_port, server_url);
833 result = STATE_CRITICAL;
834 }
835 }
836
837 if (strlen (string_expect)) {
838 if (!strstr (body_buf.buf, string_expect)) {
839 strncpy(&output_string_search[0],string_expect,sizeof(output_string_search));
840 if(output_string_search[sizeof(output_string_search)-1]!='\0') {
841 bcopy("...",&output_string_search[sizeof(output_string_search)-4],4);
842 }
843 snprintf (msg, DEFAULT_BUFFER_SIZE, _("%sstring '%s' not found on '%s://%s:%d%s', "), msg, output_string_search, use_ssl ? "https" : "http", host_name ? host_name : server_address, server_port, server_url);
844 result = STATE_CRITICAL;
845 }
846 }
847
848 if (strlen (regexp)) {
849 errcode = regexec (&preg, body_buf.buf, REGS, pmatch, 0);
850 if ((errcode == 0 && invert_regex == 0) || (errcode == REG_NOMATCH && invert_regex == 1)) {
851 /* OK - No-op to avoid changing the logic around it */
852 result = max_state_alt(STATE_OK, result);
853 }
854 else if ((errcode == REG_NOMATCH && invert_regex == 0) || (errcode == 0 && invert_regex == 1)) {
855 if (invert_regex == 0)
856 snprintf (msg, DEFAULT_BUFFER_SIZE, _("%spattern not found, "), msg);
857 else
858 snprintf (msg, DEFAULT_BUFFER_SIZE, _("%spattern found, "), msg);
859 result = STATE_CRITICAL;
860 }
861 else {
862 regerror (errcode, &preg, errbuf, MAX_INPUT_BUFFER);
863 snprintf (msg, DEFAULT_BUFFER_SIZE, _("%sExecute Error: %s, "), msg, errbuf);
864 result = STATE_UNKNOWN;
865 }
866 }
867
868 /* make sure the page is of an appropriate size */
869 if ((max_page_len > 0) && (page_len > max_page_len)) {
870 snprintf (msg, DEFAULT_BUFFER_SIZE, _("%spage size %d too large, "), msg, page_len);
871 result = max_state_alt(STATE_WARNING, result);
872 } else if ((min_page_len > 0) && (page_len < min_page_len)) {
873 snprintf (msg, DEFAULT_BUFFER_SIZE, _("%spage size %d too small, "), msg, page_len);
874 result = max_state_alt(STATE_WARNING, result);
875 }
876
877 /* -w, -c: check warning and critical level */
878 result = max_state_alt(get_status(total_time, thlds), result);
879
880 /* Cut-off trailing characters */
881 if(msg[strlen(msg)-2] == ',')
882 msg[strlen(msg)-2] = '\0';
883 else
884 msg[strlen(msg)-3] = '\0';
885
886 /* TODO: separate _() msg and status code: die (result, "HTTP %s: %s\n", state_text(result), msg); */
887 die (result, "HTTP %s: HTTP/%d.%d %d %s%s%s - %d bytes in %.3f second response time %s|%s\n",
888 state_text(result), status_line.http_major, status_line.http_minor,
889 status_line.http_code, status_line.msg,
890 strlen(msg) > 0 ? " - " : "",
891 msg, page_len, total_time,
892 (display_html ? "</A>" : ""),
893 perfstring);
894
895 /* proper cleanup after die? */
896 curlhelp_free_statusline(&status_line);
897 curl_easy_cleanup (curl);
898 curl_global_cleanup ();
899 curlhelp_freewritebuffer (&body_buf);
900 curlhelp_freewritebuffer (&header_buf);
901 if (!strcmp (http_method, "PUT")) {
902 curlhelp_freereadbuffer (&put_buf);
903 }
904
905 return result;
906}
907
908int
909uri_strcmp (const UriTextRangeA range, const char* s)
910{
911 if (!range.first) return -1;
912 if (range.afterLast - range.first < strlen (s)) return -1;
913 return strncmp (s, range.first, min( range.afterLast - range.first, strlen (s)));
914}
915
916char*
917uri_string (const UriTextRangeA range, char* buf, size_t buflen)
918{
919 if (!range.first) return "(null)";
920 strncpy (buf, range.first, max (buflen, range.afterLast - range.first));
921 buf[max (buflen, range.afterLast - range.first)] = '\0';
922 buf[range.afterLast - range.first] = '\0';
923 return buf;
924}
925
926void
927redir (curlhelp_write_curlbuf* header_buf)
928{
929 char *location = NULL;
930 curlhelp_statusline status_line;
931 struct phr_header headers[255];
932 size_t nof_headers = 255;
933 size_t msglen;
934 char buf[DEFAULT_BUFFER_SIZE];
935 char ipstr[INET_ADDR_MAX_SIZE];
936 int new_port;
937 char *new_host;
938 char *new_url;
939
940 int res = phr_parse_response (header_buf->buf, header_buf->buflen,
941 &status_line.http_minor, &status_line.http_code, &status_line.msg, &msglen,
942 headers, &nof_headers, 0);
943
944 location = get_header_value (headers, nof_headers, "location");
945
946 if (verbose >= 2)
947 printf(_("* Seen redirect location %s\n"), location);
948
949 if (++redir_depth > max_depth)
950 die (STATE_WARNING,
951 _("HTTP WARNING - maximum redirection depth %d exceeded - %s%s\n"),
952 max_depth, location, (display_html ? "</A>" : ""));
953
954 UriParserStateA state;
955 UriUriA uri;
956 state.uri = &uri;
957 if (uriParseUriA (&state, location) != URI_SUCCESS) {
958 if (state.errorCode == URI_ERROR_SYNTAX) {
959 die (STATE_UNKNOWN,
960 _("HTTP UNKNOWN - Could not parse redirect location '%s'%s\n"),
961 location, (display_html ? "</A>" : ""));
962 } else if (state.errorCode == URI_ERROR_MALLOC) {
963 die (STATE_UNKNOWN, _("HTTP UNKNOWN - Could not allocate URL\n"));
964 }
965 }
966
967 if (verbose >= 2) {
968 printf (_("** scheme: %s\n"),
969 uri_string (uri.scheme, buf, DEFAULT_BUFFER_SIZE));
970 printf (_("** host: %s\n"),
971 uri_string (uri.hostText, buf, DEFAULT_BUFFER_SIZE));
972 printf (_("** port: %s\n"),
973 uri_string (uri.portText, buf, DEFAULT_BUFFER_SIZE));
974 if (uri.hostData.ip4) {
975 inet_ntop (AF_INET, uri.hostData.ip4->data, ipstr, sizeof (ipstr));
976 printf (_("** IPv4: %s\n"), ipstr);
977 }
978 if (uri.hostData.ip6) {
979 inet_ntop (AF_INET, uri.hostData.ip6->data, ipstr, sizeof (ipstr));
980 printf (_("** IPv6: %s\n"), ipstr);
981 }
982 if (uri.pathHead) {
983 printf (_("** path: "));
984 const UriPathSegmentA* p = uri.pathHead;
985 for (; p; p = p->next) {
986 printf ("/%s", uri_string (p->text, buf, DEFAULT_BUFFER_SIZE));
987 }
988 puts ("");
989 }
990 if (uri.query.first) {
991 printf (_("** query: %s\n"),
992 uri_string (uri.query, buf, DEFAULT_BUFFER_SIZE));
993 }
994 if (uri.fragment.first) {
995 printf (_("** fragment: %s\n"),
996 uri_string (uri.fragment, buf, DEFAULT_BUFFER_SIZE));
997 }
998 }
999
1000 use_ssl = !uri_strcmp (uri.scheme, "https");
1001
1002 /* we do a sloppy test here only, because uriparser would have failed
1003 * above, if the port would be invalid, we just check for MAX_PORT
1004 */
1005 if (uri.portText.first) {
1006 new_port = atoi (uri_string (uri.portText, buf, DEFAULT_BUFFER_SIZE));
1007 } else {
1008 new_port = HTTP_PORT;
1009 if (use_ssl)
1010 new_port = HTTPS_PORT;
1011 }
1012 if (new_port > MAX_PORT)
1013 die (STATE_UNKNOWN,
1014 _("HTTP UNKNOWN - Redirection to port above %d - %s%s\n"),
1015 MAX_PORT, location, display_html ? "</A>" : "");
1016
1017 /* by RFC 7231 relative URLs in Location should be taken relative to
1018 * the original URL, so wy try to form a new absolute URL here
1019 */
1020 if (!uri.scheme.first && !uri.hostText.first) {
1021 new_host = strdup (host_name ? host_name : server_address);
1022 } else {
1023 new_host = strdup (uri_string (uri.hostText, buf, DEFAULT_BUFFER_SIZE));
1024 }
1025
1026 /* compose new path */
1027 /* TODO: handle fragments and query part of URL */
1028 new_url = (char *)calloc( 1, DEFAULT_BUFFER_SIZE);
1029 if (uri.pathHead) {
1030 const UriPathSegmentA* p = uri.pathHead;
1031 for (; p; p = p->next) {
1032 strncat (new_url, "/", DEFAULT_BUFFER_SIZE);
1033 strncat (new_url, uri_string (p->text, buf, DEFAULT_BUFFER_SIZE), DEFAULT_BUFFER_SIZE);
1034 }
1035 }
1036
1037 if (server_port==new_port &&
1038 !strncmp(server_address, new_host, MAX_IPV4_HOSTLENGTH) &&
1039 (host_name && !strncmp(host_name, new_host, MAX_IPV4_HOSTLENGTH)) &&
1040 !strcmp(server_url, new_url))
1041 die (STATE_WARNING,
1042 _("HTTP WARNING - redirection creates an infinite loop - %s://%s:%d%s%s\n"),
1043 use_ssl ? "https" : "http", new_host, new_port, new_url, (display_html ? "</A>" : ""));
1044
1045 /* set new values for redirected request */
1046
1047 if (!(followsticky & STICKY_HOST)) {
1048 free (server_address);
1049 server_address = strndup (new_host, MAX_IPV4_HOSTLENGTH);
1050 }
1051 if (!(followsticky & STICKY_PORT)) {
1052 server_port = (unsigned short)new_port;
1053 }
1054
1055 free (host_name);
1056 host_name = strndup (new_host, MAX_IPV4_HOSTLENGTH);
1057
1058 /* reset virtual port */
1059 virtual_port = server_port;
1060
1061 free(new_host);
1062 free (server_url);
1063 server_url = new_url;
1064
1065 uriFreeUriMembersA (&uri);
1066
1067 if (verbose)
1068 printf (_("Redirection to %s://%s:%d%s\n"), use_ssl ? "https" : "http",
1069 host_name ? host_name : server_address, server_port, server_url);
1070
1071 /* TODO: the hash component MUST be taken from the original URL and
1072 * attached to the URL in Location
1073 */
1074
1075 check_http ();
1076}
1077
1078/* check whether a file exists */
1079void
1080test_file (char *path)
1081{
1082 if (access(path, R_OK) == 0)
1083 return;
1084 usage2 (_("file does not exist or is not readable"), path);
1085}
1086
1087int
1088process_arguments (int argc, char **argv)
1089{
1090 char *p;
1091 int c = 1;
1092 char *temp;
1093
1094 enum {
1095 INVERT_REGEX = CHAR_MAX + 1,
1096 SNI_OPTION,
1097 CA_CERT_OPTION,
1098 HTTP_VERSION_OPTION
1099 };
1100
1101 int option = 0;
1102 int got_plus = 0;
1103 static struct option longopts[] = {
1104 STD_LONG_OPTS,
1105 {"link", no_argument, 0, 'L'},
1106 {"nohtml", no_argument, 0, 'n'},
1107 {"ssl", optional_argument, 0, 'S'},
1108 {"sni", no_argument, 0, SNI_OPTION},
1109 {"post", required_argument, 0, 'P'},
1110 {"method", required_argument, 0, 'j'},
1111 {"IP-address", required_argument, 0, 'I'},
1112 {"url", required_argument, 0, 'u'},
1113 {"port", required_argument, 0, 'p'},
1114 {"authorization", required_argument, 0, 'a'},
1115 {"proxy-authorization", required_argument, 0, 'b'},
1116 {"header-string", required_argument, 0, 'd'},
1117 {"string", required_argument, 0, 's'},
1118 {"expect", required_argument, 0, 'e'},
1119 {"regex", required_argument, 0, 'r'},
1120 {"ereg", required_argument, 0, 'r'},
1121 {"eregi", required_argument, 0, 'R'},
1122 {"linespan", no_argument, 0, 'l'},
1123 {"onredirect", required_argument, 0, 'f'},
1124 {"certificate", required_argument, 0, 'C'},
1125 {"client-cert", required_argument, 0, 'J'},
1126 {"private-key", required_argument, 0, 'K'},
1127 {"ca-cert", required_argument, 0, CA_CERT_OPTION},
1128 {"useragent", required_argument, 0, 'A'},
1129 {"header", required_argument, 0, 'k'},
1130 {"no-body", no_argument, 0, 'N'},
1131 {"max-age", required_argument, 0, 'M'},
1132 {"content-type", required_argument, 0, 'T'},
1133 {"pagesize", required_argument, 0, 'm'},
1134 {"invert-regex", no_argument, NULL, INVERT_REGEX},
1135 {"use-ipv4", no_argument, 0, '4'},
1136 {"use-ipv6", no_argument, 0, '6'},
1137 {"extended-perfdata", no_argument, 0, 'E'},
1138 {"http-version", required_argument, 0, HTTP_VERSION_OPTION},
1139 {0, 0, 0, 0}
1140 };
1141
1142 if (argc < 2)
1143 return ERROR;
1144
1145 /* support check_http compatible arguments */
1146 for (c = 1; c < argc; c++) {
1147 if (strcmp ("-to", argv[c]) == 0)
1148 strcpy (argv[c], "-t");
1149 if (strcmp ("-hn", argv[c]) == 0)
1150 strcpy (argv[c], "-H");
1151 if (strcmp ("-wt", argv[c]) == 0)
1152 strcpy (argv[c], "-w");
1153 if (strcmp ("-ct", argv[c]) == 0)
1154 strcpy (argv[c], "-c");
1155 if (strcmp ("-nohtml", argv[c]) == 0)
1156 strcpy (argv[c], "-n");
1157 }
1158
1159 server_url = strdup(DEFAULT_SERVER_URL);
1160
1161 while (1) {
1162 c = getopt_long (argc, argv, "Vvh46t:c:w:A:k:H:P:j:T:I:a:b:d:e:p:s:R:r:u:f:C:J:K:nlLS::m:M:NE", longopts, &option);
1163 if (c == -1 || c == EOF || c == 1)
1164 break;
1165
1166 switch (c) {
1167 case 'h':
1168 print_help();
1169 exit(STATE_UNKNOWN);
1170 break;
1171 case 'V':
1172 print_revision(progname, NP_VERSION);
1173 print_curl_version();
1174 exit(STATE_UNKNOWN);
1175 break;
1176 case 'v':
1177 verbose++;
1178 break;
1179 case 't': /* timeout period */
1180 if (!is_intnonneg (optarg))
1181 usage2 (_("Timeout interval must be a positive integer"), optarg);
1182 else
1183 socket_timeout = (int)strtol (optarg, NULL, 10);
1184 break;
1185 case 'c': /* critical time threshold */
1186 critical_thresholds = optarg;
1187 break;
1188 case 'w': /* warning time threshold */
1189 warning_thresholds = optarg;
1190 break;
1191 case 'H': /* virtual host */
1192 host_name = strdup (optarg);
1193 if (host_name[0] == '[') {
1194 if ((p = strstr (host_name, "]:")) != NULL) { /* [IPv6]:port */
1195 virtual_port = atoi (p + 2);
1196 /* cut off the port */
1197 host_name_length = strlen (host_name) - strlen (p) - 1;
1198 free (host_name);
1199 host_name = strndup (optarg, host_name_length);
1200 }
1201 } else if ((p = strchr (host_name, ':')) != NULL
1202 && strchr (++p, ':') == NULL) { /* IPv4:port or host:port */
1203 virtual_port = atoi (p);
1204 /* cut off the port */
1205 host_name_length = strlen (host_name) - strlen (p) - 1;
1206 free (host_name);
1207 host_name = strndup (optarg, host_name_length);
1208 }
1209 break;
1210 case 'I': /* internet address */
1211 server_address = strdup (optarg);
1212 break;
1213 case 'u': /* URL path */
1214 server_url = strdup (optarg);
1215 break;
1216 case 'p': /* Server port */
1217 if (!is_intnonneg (optarg))
1218 usage2 (_("Invalid port number, expecting a non-negative number"), optarg);
1219 else {
1220 if( strtol(optarg, NULL, 10) > MAX_PORT)
1221 usage2 (_("Invalid port number, supplied port number is too big"), optarg);
1222 server_port = (unsigned short)strtol(optarg, NULL, 10);
1223 specify_port = TRUE;
1224 }
1225 break;
1226 case 'a': /* authorization info */
1227 strncpy (user_auth, optarg, MAX_INPUT_BUFFER - 1);
1228 user_auth[MAX_INPUT_BUFFER - 1] = 0;
1229 break;
1230 case 'b': /* proxy-authorization info */
1231 strncpy (proxy_auth, optarg, MAX_INPUT_BUFFER - 1);
1232 proxy_auth[MAX_INPUT_BUFFER - 1] = 0;
1233 break;
1234 case 'P': /* HTTP POST data in URL encoded format; ignored if settings already */
1235 if (! http_post_data)
1236 http_post_data = strdup (optarg);
1237 if (! http_method)
1238 http_method = strdup("POST");
1239 break;
1240 case 'j': /* Set HTTP method */
1241 if (http_method)
1242 free(http_method);
1243 http_method = strdup (optarg);
1244 break;
1245 case 'A': /* useragent */
1246 strncpy (user_agent, optarg, DEFAULT_BUFFER_SIZE);
1247 user_agent[DEFAULT_BUFFER_SIZE-1] = '\0';
1248 break;
1249 case 'k': /* Additional headers */
1250 if (http_opt_headers_count == 0)
1251 http_opt_headers = malloc (sizeof (char *) * (++http_opt_headers_count));
1252 else
1253 http_opt_headers = realloc (http_opt_headers, sizeof (char *) * (++http_opt_headers_count));
1254 http_opt_headers[http_opt_headers_count - 1] = optarg;
1255 break;
1256 case 'L': /* show html link */
1257 display_html = TRUE;
1258 break;
1259 case 'n': /* do not show html link */
1260 display_html = FALSE;
1261 break;
1262 case 'C': /* Check SSL cert validity */
1263#ifdef LIBCURL_FEATURE_SSL
1264 if ((temp=strchr(optarg,','))!=NULL) {
1265 *temp='\0';
1266 if (!is_intnonneg (optarg))
1267 usage2 (_("Invalid certificate expiration period"), optarg);
1268 days_till_exp_warn = atoi(optarg);
1269 *temp=',';
1270 temp++;
1271 if (!is_intnonneg (temp))
1272 usage2 (_("Invalid certificate expiration period"), temp);
1273 days_till_exp_crit = atoi (temp);
1274 }
1275 else {
1276 days_till_exp_crit=0;
1277 if (!is_intnonneg (optarg))
1278 usage2 (_("Invalid certificate expiration period"), optarg);
1279 days_till_exp_warn = atoi (optarg);
1280 }
1281 check_cert = TRUE;
1282 goto enable_ssl;
1283#endif
1284 case 'J': /* use client certificate */
1285#ifdef LIBCURL_FEATURE_SSL
1286 test_file(optarg);
1287 client_cert = optarg;
1288 goto enable_ssl;
1289#endif
1290 case 'K': /* use client private key */
1291#ifdef LIBCURL_FEATURE_SSL
1292 test_file(optarg);
1293 client_privkey = optarg;
1294 goto enable_ssl;
1295#endif
1296#ifdef LIBCURL_FEATURE_SSL
1297 case CA_CERT_OPTION: /* use CA chain file */
1298 test_file(optarg);
1299 ca_cert = optarg;
1300 goto enable_ssl;
1301#endif
1302 case 'S': /* use SSL */
1303#ifdef LIBCURL_FEATURE_SSL
1304 enable_ssl:
1305 use_ssl = TRUE;
1306 /* ssl_version initialized to CURL_SSLVERSION_DEFAULT as a default.
1307 * Only set if it's non-zero. This helps when we include multiple
1308 * parameters, like -S and -C combinations */
1309 ssl_version = CURL_SSLVERSION_DEFAULT;
1310 if (c=='S' && optarg != NULL) {
1311 char *plus_ptr = strchr(optarg, '+');
1312 if (plus_ptr) {
1313 got_plus = 1;
1314 *plus_ptr = '\0';
1315 }
1316
1317 if (optarg[0] == '2')
1318 ssl_version = CURL_SSLVERSION_SSLv2;
1319 else if (optarg[0] == '3')
1320 ssl_version = CURL_SSLVERSION_SSLv3;
1321 else if (!strcmp (optarg, "1") || !strcmp (optarg, "1.0"))
1322#if LIBCURL_VERSION_NUM >= MAKE_LIBCURL_VERSION(7, 34, 0)
1323 ssl_version = CURL_SSLVERSION_TLSv1_0;
1324#else
1325 ssl_version = CURL_SSLVERSION_DEFAULT;
1326#endif /* LIBCURL_VERSION_NUM >= MAKE_LIBCURL_VERSION(7, 34, 0) */
1327 else if (!strcmp (optarg, "1.1"))
1328#if LIBCURL_VERSION_NUM >= MAKE_LIBCURL_VERSION(7, 34, 0)
1329 ssl_version = CURL_SSLVERSION_TLSv1_1;
1330#else
1331 ssl_version = CURL_SSLVERSION_DEFAULT;
1332#endif /* LIBCURL_VERSION_NUM >= MAKE_LIBCURL_VERSION(7, 34, 0) */
1333 else if (!strcmp (optarg, "1.2"))
1334#if LIBCURL_VERSION_NUM >= MAKE_LIBCURL_VERSION(7, 34, 0)
1335 ssl_version = CURL_SSLVERSION_TLSv1_2;
1336#else
1337 ssl_version = CURL_SSLVERSION_DEFAULT;
1338#endif /* LIBCURL_VERSION_NUM >= MAKE_LIBCURL_VERSION(7, 34, 0) */
1339 else if (!strcmp (optarg, "1.3"))
1340#if LIBCURL_VERSION_NUM >= MAKE_LIBCURL_VERSION(7, 52, 0)
1341 ssl_version = CURL_SSLVERSION_TLSv1_3;
1342#else
1343 ssl_version = CURL_SSLVERSION_DEFAULT;
1344#endif /* LIBCURL_VERSION_NUM >= MAKE_LIBCURL_VERSION(7, 52, 0) */
1345 else
1346 usage4 (_("Invalid option - Valid SSL/TLS versions: 2, 3, 1, 1.1, 1.2 (with optional '+' suffix)"));
1347 }
1348#if LIBCURL_VERSION_NUM >= MAKE_LIBCURL_VERSION(7, 54, 0)
1349 if (got_plus) {
1350 switch (ssl_version) {
1351 case CURL_SSLVERSION_TLSv1_3:
1352 ssl_version |= CURL_SSLVERSION_MAX_TLSv1_3;
1353 break;
1354 case CURL_SSLVERSION_TLSv1_2:
1355 case CURL_SSLVERSION_TLSv1_1:
1356 case CURL_SSLVERSION_TLSv1_0:
1357 ssl_version |= CURL_SSLVERSION_MAX_DEFAULT;
1358 break;
1359 }
1360 } else {
1361 switch (ssl_version) {
1362 case CURL_SSLVERSION_TLSv1_3:
1363 ssl_version |= CURL_SSLVERSION_MAX_TLSv1_3;
1364 break;
1365 case CURL_SSLVERSION_TLSv1_2:
1366 ssl_version |= CURL_SSLVERSION_MAX_TLSv1_2;
1367 break;
1368 case CURL_SSLVERSION_TLSv1_1:
1369 ssl_version |= CURL_SSLVERSION_MAX_TLSv1_1;
1370 break;
1371 case CURL_SSLVERSION_TLSv1_0:
1372 ssl_version |= CURL_SSLVERSION_MAX_TLSv1_0;
1373 break;
1374 }
1375 }
1376#endif /* LIBCURL_VERSION_NUM >= MAKE_LIBCURL_VERSION(7, 54, 0) */
1377 if (verbose >= 2)
1378 printf(_("* Set SSL/TLS version to %d\n"), ssl_version);
1379 if (specify_port == FALSE)
1380 server_port = HTTPS_PORT;
1381 break;
1382#else /* LIBCURL_FEATURE_SSL */
1383 /* -C -J and -K fall through to here without SSL */
1384 usage4 (_("Invalid option - SSL is not available"));
1385 break;
1386 case SNI_OPTION: /* --sni is parsed, but ignored, the default is TRUE with libcurl */
1387 use_sni = TRUE;
1388 break;
1389#endif /* LIBCURL_FEATURE_SSL */
1390 case 'f': /* onredirect */
1391 if (!strcmp (optarg, "ok"))
1392 onredirect = STATE_OK;
1393 else if (!strcmp (optarg, "warning"))
1394 onredirect = STATE_WARNING;
1395 else if (!strcmp (optarg, "critical"))
1396 onredirect = STATE_CRITICAL;
1397 else if (!strcmp (optarg, "unknown"))
1398 onredirect = STATE_UNKNOWN;
1399 else if (!strcmp (optarg, "follow"))
1400 onredirect = STATE_DEPENDENT;
1401 else if (!strcmp (optarg, "stickyport"))
1402 onredirect = STATE_DEPENDENT, followmethod = FOLLOW_HTTP_CURL, followsticky = STICKY_HOST|STICKY_PORT;
1403 else if (!strcmp (optarg, "sticky"))
1404 onredirect = STATE_DEPENDENT, followmethod = FOLLOW_HTTP_CURL, followsticky = STICKY_HOST;
1405 else if (!strcmp (optarg, "follow"))
1406 onredirect = STATE_DEPENDENT, followmethod = FOLLOW_HTTP_CURL, followsticky = STICKY_NONE;
1407 else if (!strcmp (optarg, "curl"))
1408 onredirect = STATE_DEPENDENT, followmethod = FOLLOW_LIBCURL;
1409 else usage2 (_("Invalid onredirect option"), optarg);
1410 if (verbose >= 2)
1411 printf(_("* Following redirects set to %s\n"), state_text(onredirect));
1412 break;
1413 case 'd': /* string or substring */
1414 strncpy (header_expect, optarg, MAX_INPUT_BUFFER - 1);
1415 header_expect[MAX_INPUT_BUFFER - 1] = 0;
1416 break;
1417 case 's': /* string or substring */
1418 strncpy (string_expect, optarg, MAX_INPUT_BUFFER - 1);
1419 string_expect[MAX_INPUT_BUFFER - 1] = 0;
1420 break;
1421 case 'e': /* string or substring */
1422 strncpy (server_expect, optarg, MAX_INPUT_BUFFER - 1);
1423 server_expect[MAX_INPUT_BUFFER - 1] = 0;
1424 server_expect_yn = 1;
1425 break;
1426 case 'T': /* Content-type */
1427 http_content_type = strdup (optarg);
1428 break;
1429 case 'l': /* linespan */
1430 cflags &= ~REG_NEWLINE;
1431 break;
1432 case 'R': /* regex */
1433 cflags |= REG_ICASE;
1434 case 'r': /* regex */
1435 strncpy (regexp, optarg, MAX_RE_SIZE - 1);
1436 regexp[MAX_RE_SIZE - 1] = 0;
1437 errcode = regcomp (&preg, regexp, cflags);
1438 if (errcode != 0) {
1439 (void) regerror (errcode, &preg, errbuf, MAX_INPUT_BUFFER);
1440 printf (_("Could Not Compile Regular Expression: %s"), errbuf);
1441 return ERROR;
1442 }
1443 break;
1444 case INVERT_REGEX:
1445 invert_regex = 1;
1446 break;
1447 case '4':
1448 address_family = AF_INET;
1449 break;
1450 case '6':
1451#if defined (USE_IPV6) && defined (LIBCURL_FEATURE_IPV6)
1452 address_family = AF_INET6;
1453#else
1454 usage4 (_("IPv6 support not available"));
1455#endif
1456 break;
1457 case 'm': /* min_page_length */
1458 {
1459 char *tmp;
1460 if (strchr(optarg, ':') != (char *)NULL) {
1461 /* range, so get two values, min:max */
1462 tmp = strtok(optarg, ":");
1463 if (tmp == NULL) {
1464 printf("Bad format: try \"-m min:max\"\n");
1465 exit (STATE_WARNING);
1466 } else
1467 min_page_len = atoi(tmp);
1468
1469 tmp = strtok(NULL, ":");
1470 if (tmp == NULL) {
1471 printf("Bad format: try \"-m min:max\"\n");
1472 exit (STATE_WARNING);
1473 } else
1474 max_page_len = atoi(tmp);
1475 } else
1476 min_page_len = atoi (optarg);
1477 break;
1478 }
1479 case 'N': /* no-body */
1480 no_body = TRUE;
1481 break;
1482 case 'M': /* max-age */
1483 {
1484 int L = strlen(optarg);
1485 if (L && optarg[L-1] == 'm')
1486 maximum_age = atoi (optarg) * 60;
1487 else if (L && optarg[L-1] == 'h')
1488 maximum_age = atoi (optarg) * 60 * 60;
1489 else if (L && optarg[L-1] == 'd')
1490 maximum_age = atoi (optarg) * 60 * 60 * 24;
1491 else if (L && (optarg[L-1] == 's' ||
1492 isdigit (optarg[L-1])))
1493 maximum_age = atoi (optarg);
1494 else {
1495 fprintf (stderr, "unparsable max-age: %s\n", optarg);
1496 exit (STATE_WARNING);
1497 }
1498 if (verbose >= 2)
1499 printf ("* Maximal age of document set to %d seconds\n", maximum_age);
1500 }
1501 break;
1502 case 'E': /* show extended perfdata */
1503 show_extended_perfdata = TRUE;
1504 break;
1505 case HTTP_VERSION_OPTION:
1506 curl_http_version = CURL_HTTP_VERSION_NONE;
1507 if (strcmp (optarg, "1.0") == 0) {
1508 curl_http_version = CURL_HTTP_VERSION_1_0;
1509 } else if (strcmp (optarg, "1.1") == 0) {
1510 curl_http_version = CURL_HTTP_VERSION_1_1;
1511 } else if ((strcmp (optarg, "2.0") == 0) || (strcmp (optarg, "2") == 0)) {
1512#if LIBCURL_VERSION_NUM >= MAKE_LIBCURL_VERSION(7, 33, 0)
1513 curl_http_version = CURL_HTTP_VERSION_2_0;
1514#else
1515 curl_http_version = CURL_HTTP_VERSION_NONE;
1516#endif /* LIBCURL_VERSION_NUM >= MAKE_LIBCURL_VERSION(7, 33, 0) */
1517 } else {
1518 fprintf (stderr, "unkown http-version parameter: %s\n", optarg);
1519 exit (STATE_WARNING);
1520 }
1521 break;
1522 case '?':
1523 /* print short usage statement if args not parsable */
1524 usage5 ();
1525 break;
1526 }
1527 }
1528
1529 c = optind;
1530
1531 if (server_address == NULL && c < argc)
1532 server_address = strdup (argv[c++]);
1533
1534 if (host_name == NULL && c < argc)
1535 host_name = strdup (argv[c++]);
1536
1537 if (server_address == NULL) {
1538 if (host_name == NULL)
1539 usage4 (_("You must specify a server address or host name"));
1540 else
1541 server_address = strdup (host_name);
1542 }
1543
1544 set_thresholds(&thlds, warning_thresholds, critical_thresholds);
1545
1546 if (critical_thresholds && thlds->critical->end>(double)socket_timeout)
1547 socket_timeout = (int)thlds->critical->end + 1;
1548 if (verbose >= 2)
1549 printf ("* Socket timeout set to %ld seconds\n", socket_timeout);
1550
1551 if (http_method == NULL)
1552 http_method = strdup ("GET");
1553
1554 if (client_cert && !client_privkey)
1555 usage4 (_("If you use a client certificate you must also specify a private key file"));
1556
1557 if (virtual_port == 0)
1558 virtual_port = server_port;
1559 else {
1560 if ((use_ssl && server_port == HTTPS_PORT) || (!use_ssl && server_port == HTTP_PORT))
1561 if(specify_port == FALSE)
1562 server_port = virtual_port;
1563 }
1564
1565 return TRUE;
1566}
1567
1568char *perfd_time (double elapsed_time)
1569{
1570 return fperfdata ("time", elapsed_time, "s",
1571 thlds->warning?TRUE:FALSE, thlds->warning?thlds->warning->end:0,
1572 thlds->critical?TRUE:FALSE, thlds->critical?thlds->critical->end:0,
1573 TRUE, 0, TRUE, socket_timeout);
1574}
1575
1576char *perfd_time_connect (double elapsed_time_connect)
1577{
1578 return fperfdata ("time_connect", elapsed_time_connect, "s", FALSE, 0, FALSE, 0, FALSE, 0, TRUE, socket_timeout);
1579}
1580
1581char *perfd_time_ssl (double elapsed_time_ssl)
1582{
1583 return fperfdata ("time_ssl", elapsed_time_ssl, "s", FALSE, 0, FALSE, 0, FALSE, 0, TRUE, socket_timeout);
1584}
1585
1586char *perfd_time_headers (double elapsed_time_headers)
1587{
1588 return fperfdata ("time_headers", elapsed_time_headers, "s", FALSE, 0, FALSE, 0, FALSE, 0, TRUE, socket_timeout);
1589}
1590
1591char *perfd_time_firstbyte (double elapsed_time_firstbyte)
1592{
1593 return fperfdata ("time_firstbyte", elapsed_time_firstbyte, "s", FALSE, 0, FALSE, 0, FALSE, 0, TRUE, socket_timeout);
1594}
1595
1596char *perfd_time_transfer (double elapsed_time_transfer)
1597{
1598 return fperfdata ("time_transfer", elapsed_time_transfer, "s", FALSE, 0, FALSE, 0, FALSE, 0, TRUE, socket_timeout);
1599}
1600
1601char *perfd_size (int page_len)
1602{
1603 return perfdata ("size", page_len, "B",
1604 (min_page_len>0?TRUE:FALSE), min_page_len,
1605 (min_page_len>0?TRUE:FALSE), 0,
1606 TRUE, 0, FALSE, 0);
1607}
1608
1609void
1610print_help (void)
1611{
1612 print_revision (progname, NP_VERSION);
1613
1614 printf ("Copyright (c) 1999 Ethan Galstad <nagios@nagios.org>\n");
1615 printf (COPYRIGHT, copyright, email);
1616
1617 printf ("%s\n", _("This plugin tests the HTTP service on the specified host. It can test"));
1618 printf ("%s\n", _("normal (http) and secure (https) servers, follow redirects, search for"));
1619 printf ("%s\n", _("strings and regular expressions, check connection times, and report on"));
1620 printf ("%s\n", _("certificate expiration times."));
1621 printf ("\n");
1622 printf ("%s\n", _("It makes use of libcurl to do so. It tries to be as compatible to check_http"));
1623 printf ("%s\n", _("as possible."));
1624
1625 printf ("\n\n");
1626
1627 print_usage ();
1628
1629 printf (_("NOTE: One or both of -H and -I must be specified"));
1630
1631 printf ("\n");
1632
1633 printf (UT_HELP_VRSN);
1634 printf (UT_EXTRA_OPTS);
1635
1636 printf (" %s\n", "-H, --hostname=ADDRESS");
1637 printf (" %s\n", _("Host name argument for servers using host headers (virtual host)"));
1638 printf (" %s\n", _("Append a port to include it in the header (eg: example.com:5000)"));
1639 printf (" %s\n", "-I, --IP-address=ADDRESS");
1640 printf (" %s\n", _("IP address or name (use numeric address if possible to bypass DNS lookup)."));
1641 printf (" %s\n", "-p, --port=INTEGER");
1642 printf (" %s", _("Port number (default: "));
1643 printf ("%d)\n", HTTP_PORT);
1644
1645 printf (UT_IPv46);
1646
1647#ifdef LIBCURL_FEATURE_SSL
1648 printf (" %s\n", "-S, --ssl=VERSION[+]");
1649 printf (" %s\n", _("Connect via SSL. Port defaults to 443. VERSION is optional, and prevents"));
1650 printf (" %s\n", _("auto-negotiation (2 = SSLv2, 3 = SSLv3, 1 = TLSv1, 1.1 = TLSv1.1,"));
1651 printf (" %s\n", _("1.2 = TLSv1.2). With a '+' suffix, newer versions are also accepted."));
1652 printf (" %s\n", _("Note: SSLv2 and SSLv3 are deprecated and are usually disabled in libcurl"));
1653 printf (" %s\n", "--sni");
1654 printf (" %s\n", _("Enable SSL/TLS hostname extension support (SNI)"));
1655#if LIBCURL_VERSION_NUM >= 0x071801
1656 printf (" %s\n", _("Note: --sni is the default in libcurl as SSLv2 and SSLV3 are deprecated and"));
1657 printf (" %s\n", _(" SNI only really works since TLSv1.0"));
1658#else
1659 printf (" %s\n", _("Note: SNI is not supported in libcurl before 7.18.1"));
1660#endif
1661 printf (" %s\n", "-C, --certificate=INTEGER[,INTEGER]");
1662 printf (" %s\n", _("Minimum number of days a certificate has to be valid. Port defaults to 443"));
1663 printf (" %s\n", _("(when this option is used the URL is not checked.)"));
1664 printf (" %s\n", "-J, --client-cert=FILE");
1665 printf (" %s\n", _("Name of file that contains the client certificate (PEM format)"));
1666 printf (" %s\n", _("to be used in establishing the SSL session"));
1667 printf (" %s\n", "-K, --private-key=FILE");
1668 printf (" %s\n", _("Name of file containing the private key (PEM format)"));
1669 printf (" %s\n", _("matching the client certificate"));
1670 printf (" %s\n", "--ca-cert=FILE");
1671 printf (" %s\n", _("CA certificate file to verify peer against"));
1672#endif
1673
1674 printf (" %s\n", "-e, --expect=STRING");
1675 printf (" %s\n", _("Comma-delimited list of strings, at least one of them is expected in"));
1676 printf (" %s", _("the first (status) line of the server response (default: "));
1677 printf ("%s)\n", HTTP_EXPECT);
1678 printf (" %s\n", _("If specified skips all other status line logic (ex: 3xx, 4xx, 5xx processing)"));
1679 printf (" %s\n", "-d, --header-string=STRING");
1680 printf (" %s\n", _("String to expect in the response headers"));
1681 printf (" %s\n", "-s, --string=STRING");
1682 printf (" %s\n", _("String to expect in the content"));
1683 printf (" %s\n", "-u, --url=PATH");
1684 printf (" %s\n", _("URL to GET or POST (default: /)"));
1685 printf (" %s\n", "-P, --post=STRING");
1686 printf (" %s\n", _("URL encoded http POST data"));
1687 printf (" %s\n", "-j, --method=STRING (for example: HEAD, OPTIONS, TRACE, PUT, DELETE, CONNECT)");
1688 printf (" %s\n", _("Set HTTP method."));
1689 printf (" %s\n", "-N, --no-body");
1690 printf (" %s\n", _("Don't wait for document body: stop reading after headers."));
1691 printf (" %s\n", _("(Note that this still does an HTTP GET or POST, not a HEAD.)"));
1692 printf (" %s\n", "-M, --max-age=SECONDS");
1693 printf (" %s\n", _("Warn if document is more than SECONDS old. the number can also be of"));
1694 printf (" %s\n", _("the form \"10m\" for minutes, \"10h\" for hours, or \"10d\" for days."));
1695 printf (" %s\n", "-T, --content-type=STRING");
1696 printf (" %s\n", _("specify Content-Type header media type when POSTing\n"));
1697 printf (" %s\n", "-l, --linespan");
1698 printf (" %s\n", _("Allow regex to span newlines (must precede -r or -R)"));
1699 printf (" %s\n", "-r, --regex, --ereg=STRING");
1700 printf (" %s\n", _("Search page for regex STRING"));
1701 printf (" %s\n", "-R, --eregi=STRING");
1702 printf (" %s\n", _("Search page for case-insensitive regex STRING"));
1703 printf (" %s\n", "--invert-regex");
1704 printf (" %s\n", _("Return CRITICAL if found, OK if not\n"));
1705 printf (" %s\n", "-a, --authorization=AUTH_PAIR");
1706 printf (" %s\n", _("Username:password on sites with basic authentication"));
1707 printf (" %s\n", "-b, --proxy-authorization=AUTH_PAIR");
1708 printf (" %s\n", _("Username:password on proxy-servers with basic authentication"));
1709 printf (" %s\n", "-A, --useragent=STRING");
1710 printf (" %s\n", _("String to be sent in http header as \"User Agent\""));
1711 printf (" %s\n", "-k, --header=STRING");
1712 printf (" %s\n", _("Any other tags to be sent in http header. Use multiple times for additional headers"));
1713 printf (" %s\n", "-E, --extended-perfdata");
1714 printf (" %s\n", _("Print additional performance data"));
1715 printf (" %s\n", "-L, --link");
1716 printf (" %s\n", _("Wrap output in HTML link (obsoleted by urlize)"));
1717 printf (" %s\n", "-f, --onredirect=<ok|warning|critical|follow|sticky|stickyport|curl>");
1718 printf (" %s\n", _("How to handle redirected pages. sticky is like follow but stick to the"));
1719 printf (" %s\n", _("specified IP address. stickyport also ensures port stays the same."));
1720 printf (" %s\n", _("follow uses the old redirection algorithm of check_http."));
1721 printf (" %s\n", _("curl uses CURL_FOLLOWLOCATION built into libcurl."));
1722 printf (" %s\n", "-m, --pagesize=INTEGER<:INTEGER>");
1723 printf (" %s\n", _("Minimum page size required (bytes) : Maximum page size required (bytes)"));
1724 printf ("\n");
1725 printf (" %s\n", "--http-version=VERSION");
1726 printf (" %s\n", _("Connect via specific HTTP protocol."));
1727 printf (" %s\n", _("1.0 = HTTP/1.0, 1.1 = HTTP/1.1, 2.0 = HTTP/2 (HTTP/2 will fail without -S)"));
1728 printf ("\n");
1729
1730 printf (UT_WARN_CRIT);
1731
1732 printf (UT_CONN_TIMEOUT, DEFAULT_SOCKET_TIMEOUT);
1733
1734 printf (UT_VERBOSE);
1735
1736 printf ("\n");
1737 printf ("%s\n", _("Notes:"));
1738 printf (" %s\n", _("This plugin will attempt to open an HTTP connection with the host."));
1739 printf (" %s\n", _("Successful connects return STATE_OK, refusals and timeouts return STATE_CRITICAL"));
1740 printf (" %s\n", _("other errors return STATE_UNKNOWN. Successful connects, but incorrect response"));
1741 printf (" %s\n", _("messages from the host result in STATE_WARNING return values. If you are"));
1742 printf (" %s\n", _("checking a virtual server that uses 'host headers' you must supply the FQDN"));
1743 printf (" %s\n", _("(fully qualified domain name) as the [host_name] argument."));
1744
1745#ifdef LIBCURL_FEATURE_SSL
1746 printf ("\n");
1747 printf (" %s\n", _("This plugin can also check whether an SSL enabled web server is able to"));
1748 printf (" %s\n", _("serve content (optionally within a specified time) or whether the X509 "));
1749 printf (" %s\n", _("certificate is still valid for the specified number of days."));
1750 printf ("\n");
1751 printf (" %s\n", _("Please note that this plugin does not check if the presented server"));
1752 printf (" %s\n", _("certificate matches the hostname of the server, or if the certificate"));
1753 printf (" %s\n", _("has a valid chain of trust to one of the locally installed CAs."));
1754 printf ("\n");
1755 printf ("%s\n", _("Examples:"));
1756 printf (" %s\n\n", "CHECK CONTENT: check_curl -w 5 -c 10 --ssl -H www.verisign.com");
1757 printf (" %s\n", _("When the 'www.verisign.com' server returns its content within 5 seconds,"));
1758 printf (" %s\n", _("a STATE_OK will be returned. When the server returns its content but exceeds"));
1759 printf (" %s\n", _("the 5-second threshold, a STATE_WARNING will be returned. When an error occurs,"));
1760 printf (" %s\n", _("a STATE_CRITICAL will be returned."));
1761 printf ("\n");
1762 printf (" %s\n\n", "CHECK CERTIFICATE: check_curl -H www.verisign.com -C 14");
1763 printf (" %s\n", _("When the certificate of 'www.verisign.com' is valid for more than 14 days,"));
1764 printf (" %s\n", _("a STATE_OK is returned. When the certificate is still valid, but for less than"));
1765 printf (" %s\n", _("14 days, a STATE_WARNING is returned. A STATE_CRITICAL will be returned when"));
1766 printf (" %s\n\n", _("the certificate is expired."));
1767 printf ("\n");
1768 printf (" %s\n\n", "CHECK CERTIFICATE: check_curl -H www.verisign.com -C 30,14");
1769 printf (" %s\n", _("When the certificate of 'www.verisign.com' is valid for more than 30 days,"));
1770 printf (" %s\n", _("a STATE_OK is returned. When the certificate is still valid, but for less than"));
1771 printf (" %s\n", _("30 days, but more than 14 days, a STATE_WARNING is returned."));
1772 printf (" %s\n", _("A STATE_CRITICAL will be returned when certificate expires in less than 14 days"));
1773#endif
1774
1775 printf ("\n %s\n", "CHECK WEBSERVER CONTENT VIA PROXY:");
1776 printf (" %s\n", _("It is recommended to use an environment proxy like:"));
1777 printf (" %s\n", _("http_proxy=http://192.168.100.35:3128 ./check_curl -H www.monitoring-plugins.org"));
1778 printf (" %s\n", _("legacy proxy requests in check_http style still work:"));
1779 printf (" %s\n", _("check_curl -I 192.168.100.35 -p 3128 -u http://www.monitoring-plugins.org/ -H www.monitoring-plugins.org"));
1780
1781#ifdef LIBCURL_FEATURE_SSL
1782 printf ("\n %s\n", "CHECK SSL WEBSERVER CONTENT VIA PROXY USING HTTP 1.1 CONNECT: ");
1783 printf (" %s\n", _("It is recommended to use an environment proxy like:"));
1784 printf (" %s\n", _("https_proxy=http://192.168.100.35:3128 ./check_curl -H www.verisign.com -S"));
1785 printf (" %s\n", _("legacy proxy requests in check_http style still work:"));
1786 printf (" %s\n", _("check_curl -I 192.168.100.35 -p 3128 -u https://www.verisign.com/ -S -j CONNECT -H www.verisign.com "));
1787 printf (" %s\n", _("all these options are needed: -I <proxy> -p <proxy-port> -u <check-url> -S(sl) -j CONNECT -H <webserver>"));
1788 printf (" %s\n", _("a STATE_OK will be returned. When the server returns its content but exceeds"));
1789 printf (" %s\n", _("the 5-second threshold, a STATE_WARNING will be returned. When an error occurs,"));
1790 printf (" %s\n", _("a STATE_CRITICAL will be returned."));
1791
1792#endif
1793
1794 printf (UT_SUPPORT);
1795
1796}
1797
1798
1799
1800void
1801print_usage (void)
1802{
1803 printf ("%s\n", _("Usage:"));
1804 printf (" %s -H <vhost> | -I <IP-address> [-u <uri>] [-p <port>]\n",progname);
1805 printf (" [-J <client certificate file>] [-K <private key>] [--ca-cert <CA certificate file>]\n");
1806 printf (" [-w <warn time>] [-c <critical time>] [-t <timeout>] [-L] [-E] [-a auth]\n");
1807 printf (" [-b proxy_auth] [-f <ok|warning|critcal|follow|sticky|stickyport|curl>]\n");
1808 printf (" [-e <expect>] [-d string] [-s string] [-l] [-r <regex> | -R <case-insensitive regex>]\n");
1809 printf (" [-P string] [-m <min_pg_size>:<max_pg_size>] [-4|-6] [-N] [-M <age>]\n");
1810 printf (" [-A string] [-k string] [-S <version>] [--sni] [-C <warn_age>[,<crit_age>]]\n");
1811 printf (" [-T <content-type>] [-j method]\n");
1812 printf (" [--http-version=<version>]\n");
1813 printf ("\n");
1814 printf ("%s\n", _("WARNING: check_curl is experimental. Please use"));
1815 printf ("%s\n\n", _("check_http if you need a stable version."));
1816}
1817
1818void
1819print_curl_version (void)
1820{
1821 printf( "%s\n", curl_version());
1822}
1823
1824int
1825curlhelp_initwritebuffer (curlhelp_write_curlbuf *buf)
1826{
1827 buf->bufsize = DEFAULT_BUFFER_SIZE;
1828 buf->buflen = 0;
1829 buf->buf = (char *)malloc ((size_t)buf->bufsize);
1830 if (buf->buf == NULL) return -1;
1831 return 0;
1832}
1833
1834int
1835curlhelp_buffer_write_callback (void *buffer, size_t size, size_t nmemb, void *stream)
1836{
1837 curlhelp_write_curlbuf *buf = (curlhelp_write_curlbuf *)stream;
1838
1839 while (buf->bufsize < buf->buflen + size * nmemb + 1) {
1840 buf->bufsize *= buf->bufsize * 2;
1841 buf->buf = (char *)realloc (buf->buf, buf->bufsize);
1842 if (buf->buf == NULL) return -1;
1843 }
1844
1845 memcpy (buf->buf + buf->buflen, buffer, size * nmemb);
1846 buf->buflen += size * nmemb;
1847 buf->buf[buf->buflen] = '\0';
1848
1849 return (int)(size * nmemb);
1850}
1851
1852int
1853curlhelp_buffer_read_callback (void *buffer, size_t size, size_t nmemb, void *stream)
1854{
1855 curlhelp_read_curlbuf *buf = (curlhelp_read_curlbuf *)stream;
1856
1857 size_t n = min (nmemb * size, buf->buflen - buf->pos);
1858
1859 memcpy (buffer, buf->buf + buf->pos, n);
1860 buf->pos += n;
1861
1862 return (int)n;
1863}
1864
1865void
1866curlhelp_freewritebuffer (curlhelp_write_curlbuf *buf)
1867{
1868 free (buf->buf);
1869 buf->buf = NULL;
1870}
1871
1872int
1873curlhelp_initreadbuffer (curlhelp_read_curlbuf *buf, const char *data, size_t datalen)
1874{
1875 buf->buflen = datalen;
1876 buf->buf = (char *)malloc ((size_t)buf->buflen);
1877 if (buf->buf == NULL) return -1;
1878 memcpy (buf->buf, data, datalen);
1879 buf->pos = 0;
1880 return 0;
1881}
1882
1883void
1884curlhelp_freereadbuffer (curlhelp_read_curlbuf *buf)
1885{
1886 free (buf->buf);
1887 buf->buf = NULL;
1888}
1889
1890/* TODO: where to put this, it's actually part of sstrings2 (logically)?
1891 */
1892const char*
1893strrstr2(const char *haystack, const char *needle)
1894{
1895 int counter;
1896 size_t len;
1897 const char *prev_pos;
1898 const char *pos;
1899
1900 if (haystack == NULL || needle == NULL)
1901 return NULL;
1902
1903 if (haystack[0] == '\0' || needle[0] == '\0')
1904 return NULL;
1905
1906 counter = 0;
1907 prev_pos = NULL;
1908 pos = haystack;
1909 len = strlen (needle);
1910 for (;;) {
1911 pos = strstr (pos, needle);
1912 if (pos == NULL) {
1913 if (counter == 0)
1914 return NULL;
1915 else
1916 return prev_pos;
1917 }
1918 counter++;
1919 prev_pos = pos;
1920 pos += len;
1921 if (*pos == '\0') return prev_pos;
1922 }
1923}
1924
1925int
1926curlhelp_parse_statusline (const char *buf, curlhelp_statusline *status_line)
1927{
1928 char *first_line_end;
1929 char *p;
1930 size_t first_line_len;
1931 char *pp;
1932 const char *start;
1933 char *first_line_buf;
1934
1935 /* find last start of a new header */
1936 start = strrstr2 (buf, "\r\nHTTP");
1937 if (start != NULL) {
1938 start += 2;
1939 buf = start;
1940 }
1941
1942 first_line_end = strstr(buf, "\r\n");
1943 if (first_line_end == NULL) return -1;
1944
1945 first_line_len = (size_t)(first_line_end - buf);
1946 status_line->first_line = (char *)malloc (first_line_len + 1);
1947 if (status_line->first_line == NULL) return -1;
1948 memcpy (status_line->first_line, buf, first_line_len);
1949 status_line->first_line[first_line_len] = '\0';
1950 first_line_buf = strdup( status_line->first_line );
1951
1952 /* protocol and version: "HTTP/x.x" SP or "HTTP/2" SP */
1953
1954 p = strtok(first_line_buf, "/");
1955 if( p == NULL ) { free( first_line_buf ); return -1; }
1956 if( strcmp( p, "HTTP" ) != 0 ) { free( first_line_buf ); return -1; }
1957
1958 p = strtok( NULL, " " );
1959 if( p == NULL ) { free( first_line_buf ); return -1; }
1960 if( strchr( p, '.' ) != NULL ) {
1961
1962 /* HTTP 1.x case */
1963 char *ppp;
1964 ppp = strtok( p, "." );
1965 status_line->http_major = (int)strtol( p, &pp, 10 );
1966 if( *pp != '\0' ) { free( first_line_buf ); return -1; }
1967 ppp = strtok( NULL, " " );
1968 status_line->http_minor = (int)strtol( p, &pp, 10 );
1969 if( *pp != '\0' ) { free( first_line_buf ); return -1; }
1970 p += 4; /* 1.x SP */
1971 } else {
1972 /* HTTP 2 case */
1973 status_line->http_major = (int)strtol( p, &pp, 10 );
1974 status_line->http_minor = 0;
1975 p += 2; /* 2 SP */
1976 }
1977
1978 /* status code: "404" or "404.1", then SP */
1979
1980 p = strtok( p, " " );
1981 if( p == NULL ) { free( first_line_buf ); return -1; }
1982 if( strchr( p, '.' ) != NULL ) {
1983 char *ppp;
1984 ppp = strtok( p, "." );
1985 status_line->http_code = (int)strtol( ppp, &pp, 10 );
1986 if( *pp != '\0' ) { free( first_line_buf ); return -1; }
1987 ppp = strtok( NULL, "" );
1988 status_line->http_subcode = (int)strtol( ppp, &pp, 10 );
1989 if( *pp != '\0' ) { free( first_line_buf ); return -1; }
1990 p += 6; /* 400.1 SP */
1991 } else {
1992 status_line->http_code = (int)strtol( p, &pp, 10 );
1993 status_line->http_subcode = -1;
1994 if( *pp != '\0' ) { free( first_line_buf ); return -1; }
1995 p += 4; /* 400 SP */
1996 }
1997
1998 /* Human readable message: "Not Found" CRLF */
1999
2000 p = strtok( p, "" );
2001 if( p == NULL ) { status_line->msg = ""; return 0; }
2002 status_line->msg = status_line->first_line + ( p - first_line_buf );
2003 free( first_line_buf );
2004
2005 return 0;
2006}
2007
2008void
2009curlhelp_free_statusline (curlhelp_statusline *status_line)
2010{
2011 free (status_line->first_line);
2012}
2013
2014void
2015remove_newlines (char *s)
2016{
2017 char *p;
2018
2019 for (p = s; *p != '\0'; p++)
2020 if (*p == '\r' || *p == '\n')
2021 *p = ' ';
2022}
2023
2024char *
2025get_header_value (const struct phr_header* headers, const size_t nof_headers, const char* header)
2026{
2027 int i;
2028 for( i = 0; i < nof_headers; i++ ) {
2029 if( strncasecmp( header, headers[i].name, max( headers[i].name_len, 4 ) ) == 0 ) {
2030 return strndup( headers[i].value, headers[i].value_len );
2031 }
2032 }
2033 return NULL;
2034}
2035
2036int
2037check_document_dates (const curlhelp_write_curlbuf *header_buf, char (*msg)[DEFAULT_BUFFER_SIZE])
2038{
2039 char *server_date = NULL;
2040 char *document_date = NULL;
2041 int date_result = STATE_OK;
2042 curlhelp_statusline status_line;
2043 struct phr_header headers[255];
2044 size_t nof_headers = 255;
2045 size_t msglen;
2046
2047 int res = phr_parse_response (header_buf->buf, header_buf->buflen,
2048 &status_line.http_minor, &status_line.http_code, &status_line.msg, &msglen,
2049 headers, &nof_headers, 0);
2050
2051 server_date = get_header_value (headers, nof_headers, "date");
2052 document_date = get_header_value (headers, nof_headers, "last-modified");
2053
2054 if (!server_date || !*server_date) {
2055 snprintf (*msg, DEFAULT_BUFFER_SIZE, _("%sServer date unknown, "), *msg);
2056 date_result = max_state_alt(STATE_UNKNOWN, date_result);
2057 } else if (!document_date || !*document_date) {
2058 snprintf (*msg, DEFAULT_BUFFER_SIZE, _("%sDocument modification date unknown, "), *msg);
2059 date_result = max_state_alt(STATE_CRITICAL, date_result);
2060 } else {
2061 time_t srv_data = curl_getdate (server_date, NULL);
2062 time_t doc_data = curl_getdate (document_date, NULL);
2063 if (verbose >= 2)
2064 printf ("* server date: '%s' (%d), doc_date: '%s' (%d)\n", server_date, (int)srv_data, document_date, (int)doc_data);
2065 if (srv_data <= 0) {
2066 snprintf (*msg, DEFAULT_BUFFER_SIZE, _("%sServer date \"%100s\" unparsable, "), *msg, server_date);
2067 date_result = max_state_alt(STATE_CRITICAL, date_result);
2068 } else if (doc_data <= 0) {
2069 snprintf (*msg, DEFAULT_BUFFER_SIZE, _("%sDocument date \"%100s\" unparsable, "), *msg, document_date);
2070 date_result = max_state_alt(STATE_CRITICAL, date_result);
2071 } else if (doc_data > srv_data + 30) {
2072 snprintf (*msg, DEFAULT_BUFFER_SIZE, _("%sDocument is %d seconds in the future, "), *msg, (int)doc_data - (int)srv_data);
2073 date_result = max_state_alt(STATE_CRITICAL, date_result);
2074 } else if (doc_data < srv_data - maximum_age) {
2075 int n = (srv_data - doc_data);
2076 if (n > (60 * 60 * 24 * 2)) {
2077 snprintf (*msg, DEFAULT_BUFFER_SIZE, _("%sLast modified %.1f days ago, "), *msg, ((float) n) / (60 * 60 * 24));
2078 date_result = max_state_alt(STATE_CRITICAL, date_result);
2079 } else {
2080 snprintf (*msg, DEFAULT_BUFFER_SIZE, _("%sLast modified %d:%02d:%02d ago, "), *msg, n / (60 * 60), (n / 60) % 60, n % 60);
2081 date_result = max_state_alt(STATE_CRITICAL, date_result);
2082 }
2083 }
2084 }
2085
2086 if (server_date) free (server_date);
2087 if (document_date) free (document_date);
2088
2089 return date_result;
2090}
2091
2092
2093int
2094get_content_length (const curlhelp_write_curlbuf* header_buf, const curlhelp_write_curlbuf* body_buf)
2095{
2096 const char *s;
2097 int content_length = 0;
2098 char *copy;
2099 struct phr_header headers[255];
2100 size_t nof_headers = 255;
2101 size_t msglen;
2102 char *content_length_s = NULL;
2103 curlhelp_statusline status_line;
2104
2105 int res = phr_parse_response (header_buf->buf, header_buf->buflen,
2106 &status_line.http_minor, &status_line.http_code, &status_line.msg, &msglen,
2107 headers, &nof_headers, 0);
2108
2109 content_length_s = get_header_value (headers, nof_headers, "content-length");
2110 if (!content_length_s) {
2111 return header_buf->buflen + body_buf->buflen;
2112 }
2113 content_length_s += strspn (content_length_s, " \t");
2114 content_length = atoi (content_length_s);
2115 if (content_length != body_buf->buflen) {
2116 /* TODO: should we warn if the actual and the reported body length don't match? */
2117 }
2118
2119 if (content_length_s) free (content_length_s);
2120
2121 return header_buf->buflen + body_buf->buflen;
2122}
2123
2124/* TODO: is there a better way in libcurl to check for the SSL library? */
2125curlhelp_ssl_library
2126curlhelp_get_ssl_library (CURL* curl)
2127{
2128 curl_version_info_data* version_data;
2129 char *ssl_version;
2130 char *library;
2131 curlhelp_ssl_library ssl_library = CURLHELP_SSL_LIBRARY_UNKNOWN;
2132
2133 version_data = curl_version_info (CURLVERSION_NOW);
2134 if (version_data == NULL) return CURLHELP_SSL_LIBRARY_UNKNOWN;
2135
2136 ssl_version = strdup (version_data->ssl_version);
2137 if (ssl_version == NULL ) return CURLHELP_SSL_LIBRARY_UNKNOWN;
2138
2139 library = strtok (ssl_version, "/");
2140 if (library == NULL) return CURLHELP_SSL_LIBRARY_UNKNOWN;
2141
2142 if (strcmp (library, "OpenSSL") == 0)
2143 ssl_library = CURLHELP_SSL_LIBRARY_OPENSSL;
2144 else if (strcmp (library, "LibreSSL") == 0)
2145 ssl_library = CURLHELP_SSL_LIBRARY_LIBRESSL;
2146 else if (strcmp (library, "GnuTLS") == 0)
2147 ssl_library = CURLHELP_SSL_LIBRARY_GNUTLS;
2148 else if (strcmp (library, "NSS") == 0)
2149 ssl_library = CURLHELP_SSL_LIBRARY_NSS;
2150
2151 if (verbose >= 2)
2152 printf ("* SSL library string is : %s %s (%d)\n", version_data->ssl_version, library, ssl_library);
2153
2154 free (ssl_version);
2155
2156 return ssl_library;
2157}
2158
2159const char*
2160curlhelp_get_ssl_library_string (curlhelp_ssl_library ssl_library)
2161{
2162 switch (ssl_library) {
2163 case CURLHELP_SSL_LIBRARY_OPENSSL:
2164 return "OpenSSL";
2165 case CURLHELP_SSL_LIBRARY_LIBRESSL:
2166 return "LibreSSL";
2167 case CURLHELP_SSL_LIBRARY_GNUTLS:
2168 return "GnuTLS";
2169 case CURLHELP_SSL_LIBRARY_NSS:
2170 return "NSS";
2171 case CURLHELP_SSL_LIBRARY_UNKNOWN:
2172 default:
2173 return "unknown";
2174 }
2175}
2176
2177#ifdef LIBCURL_FEATURE_SSL
2178#ifndef USE_OPENSSL
2179time_t
2180parse_cert_date (const char *s)
2181{
2182 struct tm tm;
2183 time_t date;
2184 char *res;
2185
2186 if (!s) return -1;
2187
2188 /* Jan 17 14:25:12 2020 GMT */
2189 res = strptime (s, "%Y-%m-%d %H:%M:%S GMT", &tm);
2190 /* Sep 11 12:00:00 2020 GMT */
2191 if (res == NULL) strptime (s, "%Y %m %d %H:%M:%S GMT", &tm);
2192 date = mktime (&tm);
2193
2194 return date;
2195}
2196
2197/* TODO: this needs cleanup in the sslutils.c, maybe we the #else case to
2198 * OpenSSL could be this function
2199 */
2200int
2201net_noopenssl_check_certificate (cert_ptr_union* cert_ptr, int days_till_exp_warn, int days_till_exp_crit)
2202{
2203 int i;
2204 struct curl_slist* slist;
2205 int cname_found = 0;
2206 char* start_date_str = NULL;
2207 char* end_date_str = NULL;
2208 time_t start_date;
2209 time_t end_date;
2210 char *tz;
2211 float time_left;
2212 int days_left;
2213 int time_remaining;
2214 char timestamp[50] = "";
2215 int status = STATE_UNKNOWN;
2216
2217 if (verbose >= 2)
2218 printf ("**** REQUEST CERTIFICATES ****\n");
2219
2220 for (i = 0; i < cert_ptr->to_certinfo->num_of_certs; i++) {
2221 for (slist = cert_ptr->to_certinfo->certinfo[i]; slist; slist = slist->next) {
2222 /* find first common name in subject,
2223 * TODO: check alternative subjects for
2224 * TODO: have a decent parser here and not a hack
2225 * multi-host certificate, check wildcards
2226 */
2227 if (strncasecmp (slist->data, "Subject:", 8) == 0) {
2228 int d = 3;
2229 char* p = strstr (slist->data, "CN=");
2230 if (p == NULL) {
2231 d = 5;
2232 p = strstr (slist->data, "CN = ");
2233 }
2234 if (p != NULL) {
2235 if (strncmp (host_name, p+d, strlen (host_name)) == 0) {
2236 cname_found = 1;
2237 }
2238 }
2239 } else if (strncasecmp (slist->data, "Start Date:", 11) == 0) {
2240 start_date_str = &slist->data[11];
2241 } else if (strncasecmp (slist->data, "Expire Date:", 12) == 0) {
2242 end_date_str = &slist->data[12];
2243 } else if (strncasecmp (slist->data, "Cert:", 5) == 0) {
2244 goto HAVE_FIRST_CERT;
2245 }
2246 if (verbose >= 2)
2247 printf ("%d ** %s\n", i, slist->data);
2248 }
2249 }
2250HAVE_FIRST_CERT:
2251
2252 if (verbose >= 2)
2253 printf ("**** REQUEST CERTIFICATES ****\n");
2254
2255 if (!cname_found) {
2256 printf("%s\n",_("CRITICAL - Cannot retrieve certificate subject."));
2257 return STATE_CRITICAL;
2258 }
2259
2260 start_date = parse_cert_date (start_date_str);
2261 if (start_date <= 0) {
2262 snprintf (msg, DEFAULT_BUFFER_SIZE, _("WARNING - Unparsable 'Start Date' in certificate: '%s'"),
2263 start_date_str);
2264 puts (msg);
2265 return STATE_WARNING;
2266 }
2267
2268 end_date = parse_cert_date (end_date_str);
2269 if (end_date <= 0) {
2270 snprintf (msg, DEFAULT_BUFFER_SIZE, _("WARNING - Unparsable 'Expire Date' in certificate: '%s'"),
2271 start_date_str);
2272 puts (msg);
2273 return STATE_WARNING;
2274 }
2275
2276 time_left = difftime (end_date, time(NULL));
2277 days_left = time_left / 86400;
2278 tz = getenv("TZ");
2279 setenv("TZ", "GMT", 1);
2280 tzset();
2281 strftime(timestamp, 50, "%c %z", localtime(&end_date));
2282 if (tz)
2283 setenv("TZ", tz, 1);
2284 else
2285 unsetenv("TZ");
2286 tzset();
2287
2288 if (days_left > 0 && days_left <= days_till_exp_warn) {
2289 printf (_("%s - Certificate '%s' expires in %d day(s) (%s).\n"), (days_left>days_till_exp_crit)?"WARNING":"CRITICAL", host_name, days_left, timestamp);
2290 if (days_left > days_till_exp_crit)
2291 status = STATE_WARNING;
2292 else
2293 status = STATE_CRITICAL;
2294 } else if (days_left == 0 && time_left > 0) {
2295 if (time_left >= 3600)
2296 time_remaining = (int) time_left / 3600;
2297 else
2298 time_remaining = (int) time_left / 60;
2299
2300 printf (_("%s - Certificate '%s' expires in %u %s (%s)\n"),
2301 (days_left>days_till_exp_crit) ? "WARNING" : "CRITICAL", host_name, time_remaining,
2302 time_left >= 3600 ? "hours" : "minutes", timestamp);
2303
2304 if ( days_left > days_till_exp_crit)
2305 status = STATE_WARNING;
2306 else
2307 status = STATE_CRITICAL;
2308 } else if (time_left < 0) {
2309 printf(_("CRITICAL - Certificate '%s' expired on %s.\n"), host_name, timestamp);
2310 status=STATE_CRITICAL;
2311 } else if (days_left == 0) {
2312 printf (_("%s - Certificate '%s' just expired (%s).\n"), (days_left>days_till_exp_crit)?"WARNING":"CRITICAL", host_name, timestamp);
2313 if (days_left > days_till_exp_crit)
2314 status = STATE_WARNING;
2315 else
2316 status = STATE_CRITICAL;
2317 } else {
2318 printf(_("OK - Certificate '%s' will expire on %s.\n"), host_name, timestamp);
2319 status = STATE_OK;
2320 }
2321 return status;
2322}
2323#endif /* USE_OPENSSL */
2324#endif /* LIBCURL_FEATURE_SSL */