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diff --git a/plugins/check_http.c b/plugins/check_http.c
index 9231a55..ddaca33 100644
--- a/plugins/check_http.c
+++ b/plugins/check_http.c
@@ -124,6 +124,8 @@ char *http_method;
124char *http_post_data; 124char *http_post_data;
125char *http_content_type; 125char *http_content_type;
126char buffer[MAX_INPUT_BUFFER]; 126char buffer[MAX_INPUT_BUFFER];
127char *client_cert = NULL;
128char *client_privkey = NULL;
127 129
128int process_arguments (int, char **); 130int process_arguments (int, char **);
129int check_http (void); 131int check_http (void);
@@ -170,7 +172,14 @@ main (int argc, char **argv)
170 return result; 172 return result;
171} 173}
172 174
173 175/* check whether a file exists */
176void
177test_file (char *path)
178{
179 if (access(path, R_OK) == 0)
180 return;
181 usage2 (_("file does not exist or is not readable"), path);
182}
174 183
175/* process command-line arguments */ 184/* process command-line arguments */
176int 185int
@@ -207,6 +216,8 @@ process_arguments (int argc, char **argv)
207 {"linespan", no_argument, 0, 'l'}, 216 {"linespan", no_argument, 0, 'l'},
208 {"onredirect", required_argument, 0, 'f'}, 217 {"onredirect", required_argument, 0, 'f'},
209 {"certificate", required_argument, 0, 'C'}, 218 {"certificate", required_argument, 0, 'C'},
219 {"client-cert", required_argument, 0, 'E'},
220 {"private-key", required_argument, 0, 'K'},
210 {"useragent", required_argument, 0, 'A'}, 221 {"useragent", required_argument, 0, 'A'},
211 {"header", required_argument, 0, 'k'}, 222 {"header", required_argument, 0, 'k'},
212 {"no-body", no_argument, 0, 'N'}, 223 {"no-body", no_argument, 0, 'N'},
@@ -236,7 +247,7 @@ process_arguments (int argc, char **argv)
236 } 247 }
237 248
238 while (1) { 249 while (1) {
239 c = getopt_long (argc, argv, "Vvh46t:c:w:A:k:H:P:j:T:I:a:b:e:p:s:R:r:u:f:C:nlLS::m:M:N", longopts, &option); 250 c = getopt_long (argc, argv, "Vvh46t:c:w:A:k:H:P:j:T:I:a:b:e:p:s:R:r:u:f:C:E:K:nlLS::m:M:N", longopts, &option);
240 if (c == -1 || c == EOF) 251 if (c == -1 || c == EOF)
241 break; 252 break;
242 253
@@ -301,10 +312,23 @@ process_arguments (int argc, char **argv)
301 days_till_exp_warn = atoi (optarg); 312 days_till_exp_warn = atoi (optarg);
302 } 313 }
303 check_cert = TRUE; 314 check_cert = TRUE;
304 /* Fall through to -S option */ 315 goto enable_ssl;
316#endif
317 case 'E': /* use client certificate */
318#ifdef HAVE_SSL
319 test_file(optarg);
320 client_cert = optarg;
321 goto enable_ssl;
322#endif
323 case 'K': /* use client private key */
324#ifdef HAVE_SSL
325 test_file(optarg);
326 client_privkey = optarg;
327 goto enable_ssl;
305#endif 328#endif
306 case 'S': /* use SSL */ 329 case 'S': /* use SSL */
307#ifdef HAVE_SSL 330#ifdef HAVE_SSL
331 enable_ssl:
308 use_ssl = TRUE; 332 use_ssl = TRUE;
309 if (optarg == NULL || c != 'S') 333 if (optarg == NULL || c != 'S')
310 ssl_version = 0; 334 ssl_version = 0;
@@ -316,6 +340,7 @@ process_arguments (int argc, char **argv)
316 if (specify_port == FALSE) 340 if (specify_port == FALSE)
317 server_port = HTTPS_PORT; 341 server_port = HTTPS_PORT;
318#else 342#else
343 /* -C -E and -K fall through to here without SSL */
319 usage4 (_("Invalid option - SSL is not available")); 344 usage4 (_("Invalid option - SSL is not available"));
320#endif 345#endif
321 break; 346 break;
@@ -497,6 +522,9 @@ process_arguments (int argc, char **argv)
497 if (http_method == NULL) 522 if (http_method == NULL)
498 http_method = strdup ("GET"); 523 http_method = strdup ("GET");
499 524
525 if (client_cert && !client_privkey)
526 usage4 (_("If you use a client certificate you must also specify a private key file"));
527
500 return TRUE; 528 return TRUE;
501} 529}
502 530
@@ -820,7 +848,7 @@ check_http (void)
820 die (STATE_CRITICAL, _("HTTP CRITICAL - Unable to open TCP socket\n")); 848 die (STATE_CRITICAL, _("HTTP CRITICAL - Unable to open TCP socket\n"));
821#ifdef HAVE_SSL 849#ifdef HAVE_SSL
822 if (use_ssl == TRUE) { 850 if (use_ssl == TRUE) {
823 result = np_net_ssl_init_with_hostname_and_version(sd, (use_sni ? host_name : NULL), ssl_version); 851 result = np_net_ssl_init_with_hostname_version_and_certificate(sd, (use_sni ? host_name : NULL), ssl_version, client_cert, client_privkey);
824 if (result != STATE_OK) 852 if (result != STATE_OK)
825 return result; 853 return result;
826 if (check_cert == TRUE) { 854 if (check_cert == TRUE) {
@@ -1354,7 +1382,13 @@ print_help (void)
1354 printf (" %s\n", _("Enable SSL/TLS hostname extension support (SNI)")); 1382 printf (" %s\n", _("Enable SSL/TLS hostname extension support (SNI)"));
1355 printf (" %s\n", "-C, --certificate=INTEGER[,INTEGER]"); 1383 printf (" %s\n", "-C, --certificate=INTEGER[,INTEGER]");
1356 printf (" %s\n", _("Minimum number of days a certificate has to be valid. Port defaults to 443")); 1384 printf (" %s\n", _("Minimum number of days a certificate has to be valid. Port defaults to 443"));
1357 printf (" %s\n", _("(when this option is used the URL is not checked.)\n")); 1385 printf (" %s\n", _("(when this option is used the URL is not checked.)"));
1386 printf (" %s\n", "-E, --client-cert=FILE");
1387 printf (" %s\n", _("Name of file that contains the client certificate (PEM format)"));
1388 printf (" %s\n", _("to be used in establishing the SSL session"));
1389 printf (" %s\n", "-K, --private-key=FILE");
1390 printf (" %s\n", _("Name of file containing the private key (PEM format)"));
1391 printf (" %s\n", _("matching the client certificate"));
1358#endif 1392#endif
1359 1393
1360 printf (" %s\n", "-e, --expect=STRING"); 1394 printf (" %s\n", "-e, --expect=STRING");
@@ -1461,6 +1495,7 @@ print_usage (void)
1461{ 1495{
1462 printf ("%s\n", _("Usage:")); 1496 printf ("%s\n", _("Usage:"));
1463 printf (" %s -H <vhost> | -I <IP-address> [-u <uri>] [-p <port>]\n",progname); 1497 printf (" %s -H <vhost> | -I <IP-address> [-u <uri>] [-p <port>]\n",progname);
1498 printf (" [-E <client certificate file>] [-K <private key>]\n");
1464 printf (" [-w <warn time>] [-c <critical time>] [-t <timeout>] [-L] [-a auth]\n"); 1499 printf (" [-w <warn time>] [-c <critical time>] [-t <timeout>] [-L] [-a auth]\n");
1465 printf (" [-b proxy_auth] [-f <ok|warning|critcal|follow|sticky|stickyport>]\n"); 1500 printf (" [-b proxy_auth] [-f <ok|warning|critcal|follow|sticky|stickyport>]\n");
1466 printf (" [-e <expect>] [-s string] [-l] [-r <regex> | -R <case-insensitive regex>]\n"); 1501 printf (" [-e <expect>] [-s string] [-l] [-r <regex> | -R <case-insensitive regex>]\n");
diff --git a/plugins/netutils.h b/plugins/netutils.h
index 21017f1..765b3d5 100644
--- a/plugins/netutils.h
+++ b/plugins/netutils.h
@@ -100,6 +100,8 @@ extern int address_family;
100/* maybe this could be merged with the above np_net_connect, via some flags */ 100/* maybe this could be merged with the above np_net_connect, via some flags */
101int np_net_ssl_init(int sd); 101int np_net_ssl_init(int sd);
102int np_net_ssl_init_with_hostname(int sd, char *host_name); 102int np_net_ssl_init_with_hostname(int sd, char *host_name);
103int np_net_ssl_init_with_hostname_and_version(int sd, char *host_name, int version);
104int np_net_ssl_init_with_hostname_version_and_certificate(int sd, char *host_name, int version, char *cert, char *privkey);
103void np_net_ssl_cleanup(); 105void np_net_ssl_cleanup();
104int np_net_ssl_write(const void *buf, int num); 106int np_net_ssl_write(const void *buf, int num);
105int np_net_ssl_read(void *buf, int num); 107int np_net_ssl_read(void *buf, int num);
diff --git a/plugins/sslutils.c b/plugins/sslutils.c
index a1ce560..4927e36 100644
--- a/plugins/sslutils.c
+++ b/plugins/sslutils.c
@@ -45,6 +45,10 @@ int np_net_ssl_init_with_hostname(int sd, char *host_name) {
45} 45}
46 46
47int np_net_ssl_init_with_hostname_and_version(int sd, char *host_name, int version) { 47int np_net_ssl_init_with_hostname_and_version(int sd, char *host_name, int version) {
48 return np_net_ssl_init_with_hostname_version_and_certificate(sd, host_name, version, NULL, NULL);
49}
50
51int np_net_ssl_init_with_hostname_version_and_certificate(int sd, char *host_name, int version, char *cert, char *privkey) {
48 const SSL_METHOD *method = NULL; 52 const SSL_METHOD *method = NULL;
49 53
50 switch (version) { 54 switch (version) {
@@ -80,6 +84,14 @@ int np_net_ssl_init_with_hostname_and_version(int sd, char *host_name, int versi
80 printf("%s\n", _("CRITICAL - Cannot create SSL context.")); 84 printf("%s\n", _("CRITICAL - Cannot create SSL context."));
81 return STATE_CRITICAL; 85 return STATE_CRITICAL;
82 } 86 }
87 if (cert && privkey) {
88 SSL_CTX_use_certificate_file(c, cert, SSL_FILETYPE_PEM);
89 SSL_CTX_use_PrivateKey_file(c, privkey, SSL_FILETYPE_PEM);
90 if (!SSL_CTX_check_private_key(c)) {
91 printf ("%s\n", _("CRITICAL - Private key does not seem to match certificate!\n"));
92 return STATE_CRITICAL;
93 }
94 }
83#ifdef SSL_OP_NO_TICKET 95#ifdef SSL_OP_NO_TICKET
84 SSL_CTX_set_options(c, SSL_OP_NO_TICKET); 96 SSL_CTX_set_options(c, SSL_OP_NO_TICKET);
85#endif 97#endif