summaryrefslogtreecommitdiffstats
path: root/plugins/check_http.c
blob: 35b2cca377399e45338f2dd1626dad9f35863ec8 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
/******************************************************************************

 This program is free software; you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation; either version 2 of the License, or
 (at your option) any later version.

 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.

 You should have received a copy of the GNU General Public License
 along with this program; if not, write to the Free Software
 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

 $Id$
 
******************************************************************************/
/* splint -I. -I../../plugins -I../../lib/ -I/usr/kerberos/include/ ../../plugins/check_http.c */

const char *progname = "check_http";
const char *revision = "$Revision$";
const char *copyright = "1999-2004";
const char *email = "nagiosplug-devel@lists.sourceforge.net";

#include "common.h"
#include "netutils.h"
#include "utils.h"

#define INPUT_DELIMITER ";"

#define HTTP_EXPECT "HTTP/1."
enum {
	MAX_IPV4_HOSTLENGTH = 255,
	HTTP_PORT = 80,
	HTTPS_PORT = 443
};

#ifdef HAVE_SSL_H
#include <rsa.h>
#include <crypto.h>
#include <x509.h>
#include <pem.h>
#include <ssl.h>
#include <err.h>
#include <rand.h>
#else
# ifdef HAVE_OPENSSL_SSL_H
# include <openssl/rsa.h>
# include <openssl/crypto.h>
# include <openssl/x509.h>
# include <openssl/pem.h>
# include <openssl/ssl.h>
# include <openssl/err.h>
# include <openssl/rand.h>
# endif
#endif

#ifdef HAVE_SSL
int check_cert = FALSE;
int days_till_exp;
char *randbuff;
SSL_CTX *ctx;
SSL *ssl;
X509 *server_cert;
int connect_SSL (void);
int check_certificate (X509 **);
#endif
int no_body = FALSE;
int maximum_age = -1;

#ifdef HAVE_REGEX_H
enum {
	REGS = 2,
	MAX_RE_SIZE = 256
};
#include <regex.h>
regex_t preg;
regmatch_t pmatch[REGS];
char regexp[MAX_RE_SIZE];
char errbuf[MAX_INPUT_BUFFER];
int cflags = REG_NOSUB | REG_EXTENDED | REG_NEWLINE;
int errcode;
#endif

struct timeval tv;

#define HTTP_URL "/"
#define CRLF "\r\n"

char timestamp[17] = "";
int specify_port = FALSE;
int server_port = HTTP_PORT;
char server_port_text[6] = "";
char server_type[6] = "http";
char *server_address;
char *host_name;
char *server_url;
char *user_agent;
int server_url_length;
int server_expect_yn = 0;
char server_expect[MAX_INPUT_BUFFER] = HTTP_EXPECT;
char string_expect[MAX_INPUT_BUFFER] = "";
double warning_time = 0;
int check_warning_time = FALSE;
double critical_time = 0;
int check_critical_time = FALSE;
char user_auth[MAX_INPUT_BUFFER] = "";
int display_html = FALSE;
char *http_opt_headers;
int onredirect = STATE_OK;
int use_ssl = FALSE;
int verbose = FALSE;
int sd;
int min_page_len = 0;
int max_page_len = 0;
int redir_depth = 0;
int max_depth = 15;
char *http_method;
char *http_post_data;
char *http_content_type;
char buffer[MAX_INPUT_BUFFER];

int process_arguments (int, char **);
static char *base64 (const char *bin, size_t len);
int check_http (void);
void redir (char *pos, char *status_line);
int server_type_check(const char *type);
int server_port_check(int ssl_flag);
char *perfd_time (double microsec);
char *perfd_size (int page_len);
int my_recv (void);
int my_close (void);
void print_help (void);
void print_usage (void);

int
main (int argc, char **argv)
{
	int result = STATE_UNKNOWN;

	/* Set default URL. Must be malloced for subsequent realloc if --onredirect=follow */
	server_url = strdup(HTTP_URL);
	server_url_length = strlen(server_url);
	asprintf (&user_agent, "User-Agent: check_http/%s (nagios-plugins %s)",
	          clean_revstring (revision), VERSION);

	if (process_arguments (argc, argv) == ERROR)
		usage4 (_("Could not parse arguments"));

	if (strstr (timestamp, ":")) {
		if (strstr (server_url, "?"))
			asprintf (&server_url, "%s&%s", server_url, timestamp);
		else
			asprintf (&server_url, "%s?%s", server_url, timestamp);
	}

	if (display_html == TRUE)
		printf ("<A HREF=\"%s://%s:%d%s\" target=\"_blank\">", 
			use_ssl ? "https" : "http", host_name,
			server_port, server_url);

	/* initialize alarm signal handling, set socket timeout, start timer */
	(void) signal (SIGALRM, socket_timeout_alarm_handler);
	(void) alarm (socket_timeout);
	gettimeofday (&tv, NULL);

#ifdef HAVE_SSL
	if (use_ssl && check_cert == TRUE) {
		if (connect_SSL () != OK)
			die (STATE_CRITICAL, _("HTTP CRITICAL - Could not make SSL connection\n"));
		if ((server_cert = SSL_get_peer_certificate (ssl)) != NULL) {
			result = check_certificate (&server_cert);
			X509_free (server_cert);
		}
		else {
			printf (_("CRITICAL - Cannot retrieve server certificate.\n"));
			result = STATE_CRITICAL;
		}
		SSL_shutdown (ssl);
		SSL_free (ssl);
		SSL_CTX_free (ctx);
		close (sd);
	}
	else {
		result = check_http ();
	}
#else
	result = check_http ();
#endif
	return result;
}



/* process command-line arguments */
int
process_arguments (int argc, char **argv)
{
	int c = 1;

	int option = 0;
	static struct option longopts[] = {
		STD_LONG_OPTS,
		{"file",required_argument,0,'F'},
		{"link", no_argument, 0, 'L'},
		{"nohtml", no_argument, 0, 'n'},
		{"ssl", no_argument, 0, 'S'},
		{"verbose", no_argument, 0, 'v'},
		{"post", required_argument, 0, 'P'},
		{"IP-address", required_argument, 0, 'I'},
		{"url", required_argument, 0, 'u'},
		{"string", required_argument, 0, 's'},
		{"regex", required_argument, 0, 'r'},
		{"ereg", required_argument, 0, 'r'},
		{"eregi", required_argument, 0, 'R'},
 		{"linespan", no_argument, 0, 'l'},
		{"onredirect", required_argument, 0, 'f'},
		{"certificate", required_argument, 0, 'C'},
		{"useragent", required_argument, 0, 'A'},
		{"header", required_argument, 0, 'k'},
		{"no-body", no_argument, 0, 'N'},
		{"max-age", required_argument, 0, 'M'},
		{"content-type", required_argument, 0, 'T'},
		{"pagesize", required_argument, 0, 'm'},
		{"use-ipv4", no_argument, 0, '4'},
		{"use-ipv6", no_argument, 0, '6'},
		{0, 0, 0, 0}
	};

	if (argc < 2)
		return ERROR;

	for (c = 1; c < argc; c++) {
		if (strcmp ("-to", argv[c]) == 0)
			strcpy (argv[c], "-t");
		if (strcmp ("-hn", argv[c]) == 0)
			strcpy (argv[c], "-H");
		if (strcmp ("-wt", argv[c]) == 0)
			strcpy (argv[c], "-w");
		if (strcmp ("-ct", argv[c]) == 0)
			strcpy (argv[c], "-c");
		if (strcmp ("-nohtml", argv[c]) == 0)
			strcpy (argv[c], "-n");
	}

	while (1) {
		c = getopt_long (argc, argv, "Vvh46t:c:w:A:k:H:P:T:I:a:e:p:s:R:r:u:f:C:nlLSm:M:N", longopts, &option);
		if (c == -1 || c == EOF)
			break;

		switch (c) {
		case '?': /* usage */
			usage2 (_("Unknown argument"), optarg);
			break;
		case 'h': /* help */
			print_help ();
			exit (STATE_OK);
			break;
		case 'V': /* version */
			print_revision (progname, revision);
			exit (STATE_OK);
			break;
		case 't': /* timeout period */
			if (!is_intnonneg (optarg))
				usage2 (_("Timeout interval must be a positive integer"), optarg);
			else
				socket_timeout = atoi (optarg);
			break;
		case 'c': /* critical time threshold */
			if (!is_nonnegative (optarg))
				usage2 (_("Critical threshold must be integer"), optarg);
			else {
				critical_time = strtod (optarg, NULL);
				check_critical_time = TRUE;
			}
			break;
		case 'w': /* warning time threshold */
			if (!is_nonnegative (optarg))
				usage2 (_("Warning threshold must be integer"), optarg);
			else {
				warning_time = strtod (optarg, NULL);
				check_warning_time = TRUE;
			}
			break;
		case 'A': /* User Agent String */
			asprintf (&user_agent, "User-Agent: %s", optarg);
			break;
		case 'k': /* Additional headers */
			asprintf (&http_opt_headers, "%s", optarg);
			break;
		case 'L': /* show html link */
			display_html = TRUE;
			break;
		case 'n': /* do not show html link */
			display_html = FALSE;
			break;
		case 'S': /* use SSL */
#ifndef HAVE_SSL
			usage4 (_("Invalid option - SSL is not available"));
#endif
			use_ssl = TRUE;
			if (specify_port == FALSE)
				server_port = HTTPS_PORT;
			break;
		case 'C': /* Check SSL cert validity */
#ifdef HAVE_SSL
			if (!is_intnonneg (optarg))
				usage2 (_("Invalid certificate expiration period"), optarg);
			else {
				days_till_exp = atoi (optarg);
				check_cert = TRUE;
			}
#else
			usage4 (_("Invalid option - SSL is not available"));
#endif
			break;
		case 'f': /* onredirect */
			if (!strcmp (optarg, "follow"))
				onredirect = STATE_DEPENDENT;
			if (!strcmp (optarg, "unknown"))
				onredirect = STATE_UNKNOWN;
			if (!strcmp (optarg, "ok"))
				onredirect = STATE_OK;
			if (!strcmp (optarg, "warning"))
				onredirect = STATE_WARNING;
			if (!strcmp (optarg, "critical"))
				onredirect = STATE_CRITICAL;
			if (verbose)
				printf(_("option f:%d \n"), onredirect);  
			break;
		/* Note: H, I, and u must be malloc'd or will fail on redirects */
		case 'H': /* Host Name (virtual host) */
 			host_name = strdup (optarg);
			if (strstr (optarg, ":"))
				sscanf (optarg, "%*[^:]:%d", &server_port);
			break;
		case 'I': /* Server IP-address */
 			server_address = strdup (optarg);
			break;
		case 'u': /* URL path */
			server_url = strdup (optarg);
			server_url_length = strlen (server_url);
			break;
		case 'p': /* Server port */
			if (!is_intnonneg (optarg))
				usage2 (_("Invalid port number"), optarg);
			else {
				server_port = atoi (optarg);
				specify_port = TRUE;
			}
			break;
		case 'a': /* authorization info */
			strncpy (user_auth, optarg, MAX_INPUT_BUFFER - 1);
			user_auth[MAX_INPUT_BUFFER - 1] = 0;
			break;
		case 'P': /* HTTP POST data in URL encoded format */
			if (http_method || http_post_data) break;
			http_method = strdup("POST");
			http_post_data = strdup (optarg);
			break;
		case 's': /* string or substring */
			strncpy (string_expect, optarg, MAX_INPUT_BUFFER - 1);
			string_expect[MAX_INPUT_BUFFER - 1] = 0;
			break;
		case 'e': /* string or substring */
			strncpy (server_expect, optarg, MAX_INPUT_BUFFER - 1);
			server_expect[MAX_INPUT_BUFFER - 1] = 0;
			server_expect_yn = 1;
			break;
		case 'T': /* Content-type */
			asprintf (&http_content_type, "%s", optarg);
			break;
#ifndef HAVE_REGEX_H
 		case 'l': /* linespan */
 		case 'r': /* linespan */
 		case 'R': /* linespan */
			usage4 (_("Call for regex which was not a compiled option"));
			break;
#else
 		case 'l': /* linespan */
 			cflags &= ~REG_NEWLINE;
 			break;
		case 'R': /* regex */
			cflags |= REG_ICASE;
		case 'r': /* regex */
			strncpy (regexp, optarg, MAX_RE_SIZE - 1);
			regexp[MAX_RE_SIZE - 1] = 0;
			errcode = regcomp (&preg, regexp, cflags);
			if (errcode != 0) {
				(void) regerror (errcode, &preg, errbuf, MAX_INPUT_BUFFER);
				printf (_("Could Not Compile Regular Expression: %s"), errbuf);
				return ERROR;
			}
			break;
#endif
		case '4':
			address_family = AF_INET;
			break;
		case '6':
#ifdef USE_IPV6
			address_family = AF_INET6;
#else
			usage4 (_("IPv6 support not available"));
#endif
			break;
		case 'v': /* verbose */
			verbose = TRUE;
			break;
		case 'm': /* min_page_length */
			{
			char *tmp;
			if (strchr(optarg, ':') != (char *)NULL) {
				/* range, so get two values, min:max */
				tmp = strtok(optarg, ":");
				if (tmp == NULL) {
					printf("Bad format: try \"-m min:max\"\n");
					exit (STATE_WARNING);
				} else
					min_page_len = atoi(tmp);

				tmp = strtok(NULL, ":");
				if (tmp == NULL) {
					printf("Bad format: try \"-m min:max\"\n");
					exit (STATE_WARNING);
				} else
					max_page_len = atoi(tmp);
			} else 
				min_page_len = atoi (optarg);
			break;
			}
		case 'N': /* no-body */
			no_body = TRUE;
			break;
		case 'M': /* max-age */
                  {
                    int L = strlen(optarg);
                    if (L && optarg[L-1] == 'm')
                      maximum_age = atoi (optarg) * 60;
                    else if (L && optarg[L-1] == 'h')
                      maximum_age = atoi (optarg) * 60 * 60;
                    else if (L && optarg[L-1] == 'd')
                      maximum_age = atoi (optarg) * 60 * 60 * 24;
                    else if (L && (optarg[L-1] == 's' ||
                                   isdigit (optarg[L-1])))
                      maximum_age = atoi (optarg);
                    else {
                      fprintf (stderr, "unparsable max-age: %s\n", optarg);
                      exit (STATE_WARNING);
                    }
                  }
                  break;
		}
	}

	c = optind;

	if (server_address == NULL && c < argc)
		server_address = strdup (argv[c++]);

	if (host_name == NULL && c < argc)
 		host_name = strdup (argv[c++]);

	if (server_address == NULL) {
		if (host_name == NULL)
			usage4 (_("You must specify a server address or host name"));
		else
			server_address = strdup (host_name);
	}

	if (check_critical_time && critical_time>(double)socket_timeout)
		socket_timeout = (int)critical_time + 1;

	if (http_method == NULL)
		http_method = strdup ("GET");

	return TRUE;
}



/* written by lauri alanko */
static char *
base64 (const char *bin, size_t len)
{

	char *buf = (char *) malloc ((len + 2) / 3 * 4 + 1);
	size_t i = 0, j = 0;

	char BASE64_END = '=';
	char base64_table[64];
	strncpy (base64_table, "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/", 64);

	while (j < len - 2) {
		buf[i++] = base64_table[bin[j] >> 2];
		buf[i++] = base64_table[((bin[j] & 3) << 4) | (bin[j + 1] >> 4)];
		buf[i++] = base64_table[((bin[j + 1] & 15) << 2) | (bin[j + 2] >> 6)];
		buf[i++] = base64_table[bin[j + 2] & 63];
		j += 3;
	}

	switch (len - j) {
	case 1:
		buf[i++] = base64_table[bin[j] >> 2];
		buf[i++] = base64_table[(bin[j] & 3) << 4];
		buf[i++] = BASE64_END;
		buf[i++] = BASE64_END;
		break;
	case 2:
		buf[i++] = base64_table[bin[j] >> 2];
		buf[i++] = base64_table[((bin[j] & 3) << 4) | (bin[j + 1] >> 4)];
		buf[i++] = base64_table[(bin[j + 1] & 15) << 2];
		buf[i++] = BASE64_END;
		break;
	case 0:
		break;
	}

	buf[i] = '\0';
	return buf;
}



/* Returns 1 if we're done processing the document body; 0 to keep going */
static int
document_headers_done (char *full_page)
{
	const char *body;

	for (body = full_page; *body; body++) {
		if (!strncmp (body, "\n\n", 2) || !strncmp (body, "\n\r\n", 3))
			break;
	}

	if (!*body)
		return 0;  /* haven't read end of headers yet */

	full_page[body - full_page] = 0;
	return 1;
}

static time_t
parse_time_string (const char *string)
{
	struct tm tm;
	time_t t;
	memset (&tm, 0, sizeof(tm));

	/* Like this: Tue, 25 Dec 2001 02:59:03 GMT */

	if (isupper (string[0])  &&  /* Tue */
		islower (string[1])  &&
		islower (string[2])  &&
		',' ==   string[3]   &&
		' ' ==   string[4]   &&
		(isdigit(string[5]) || string[5] == ' ') &&   /* 25 */
		isdigit (string[6])  &&
		' ' ==   string[7]   &&
		isupper (string[8])  &&  /* Dec */
		islower (string[9])  &&
		islower (string[10]) &&
		' ' ==   string[11]  &&
		isdigit (string[12]) &&  /* 2001 */
		isdigit (string[13]) &&
		isdigit (string[14]) &&
		isdigit (string[15]) &&
		' ' ==   string[16]  &&
		isdigit (string[17]) &&  /* 02: */
		isdigit (string[18]) &&
		':' ==   string[19]  &&
		isdigit (string[20]) &&  /* 59: */
		isdigit (string[21]) &&
		':' ==   string[22]  &&
		isdigit (string[23]) &&  /* 03 */
		isdigit (string[24]) &&
		' ' ==   string[25]  &&
		'G' ==   string[26]  &&  /* GMT */
		'M' ==   string[27]  &&  /* GMT */
		'T' ==   string[28]) {

		tm.tm_sec  = 10 * (string[23]-'0') + (string[24]-'0');
		tm.tm_min  = 10 * (string[20]-'0') + (string[21]-'0');
		tm.tm_hour = 10 * (string[17]-'0') + (string[18]-'0');
		tm.tm_mday = 10 * (string[5] == ' ' ? 0 : string[5]-'0') + (string[6]-'0');
		tm.tm_mon = (!strncmp (string+8, "Jan", 3) ? 0 :
			!strncmp (string+8, "Feb", 3) ? 1 :
			!strncmp (string+8, "Mar", 3) ? 2 :
			!strncmp (string+8, "Apr", 3) ? 3 :
			!strncmp (string+8, "May", 3) ? 4 :
			!strncmp (string+8, "Jun", 3) ? 5 :
			!strncmp (string+8, "Jul", 3) ? 6 :
			!strncmp (string+8, "Aug", 3) ? 7 :
			!strncmp (string+8, "Sep", 3) ? 8 :
			!strncmp (string+8, "Oct", 3) ? 9 :
			!strncmp (string+8, "Nov", 3) ? 10 :
			!strncmp (string+8, "Dec", 3) ? 11 :
			-1);
		tm.tm_year = ((1000 * (string[12]-'0') +
			100 * (string[13]-'0') +
			10 * (string[14]-'0') +
			(string[15]-'0'))
			- 1900);

		tm.tm_isdst = 0;  /* GMT is never in DST, right? */

		if (tm.tm_mon < 0 || tm.tm_mday < 1 || tm.tm_mday > 31)
			return 0;

		/* 
		This is actually wrong: we need to subtract the local timezone
		offset from GMT from this value.  But, that's ok in this usage,
		because we only comparing these two GMT dates against each other,
		so it doesn't matter what time zone we parse them in.
		*/

		t = mktime (&tm);
		if (t == (time_t) -1) t = 0;

		if (verbose) {
			const char *s = string;
			while (*s && *s != '\r' && *s != '\n')
			fputc (*s++, stdout);
			printf (" ==> %lu\n", (unsigned long) t);
		}

		return t;

	} else {
		return 0;
	}
}



static void
check_document_dates (const char *headers)
{
	const char *s;
	char *server_date = 0;
	char *document_date = 0;

	s = headers;
	while (*s) {
		const char *field = s;
		const char *value = 0;

		/* Find the end of the header field */
		while (*s && !isspace(*s) && *s != ':')
			s++;

		/* Remember the header value, if any. */
		if (*s == ':')
			value = ++s;

		/* Skip to the end of the header, including continuation lines. */
		while (*s && !(*s == '\n' && (s[1] != ' ' && s[1] != '\t')))
			s++;
		s++;

		/* Process this header. */
		if (value && value > field+2) {
			char *ff = (char *) malloc (value-field);
			char *ss = ff;
			while (field < value-1)
				*ss++ = tolower(*field++);
			*ss++ = 0;

			if (!strcmp (ff, "date") || !strcmp (ff, "last-modified")) {
				const char *e;
				while (*value && isspace (*value))
					value++;
				for (e = value; *e && *e != '\r' && *e != '\n'; e++)
					;
				ss = (char *) malloc (e - value + 1);
				strncpy (ss, value, e - value);
				ss[e - value] = 0;
				if (!strcmp (ff, "date")) {
					if (server_date) free (server_date);
					server_date = ss;
				} else {
					if (document_date) free (document_date);
					document_date = ss;
				}
			}
			free (ff);
		}
	}

	/* Done parsing the body.  Now check the dates we (hopefully) parsed.  */
	if (!server_date || !*server_date) {
		die (STATE_UNKNOWN, _("Server date unknown\n"));
	} else if (!document_date || !*document_date) {
		die (STATE_CRITICAL, _("Document modification date unknown\n"));
	} else {
		time_t srv_data = parse_time_string (server_date);
		time_t doc_data = parse_time_string (document_date);

		if (srv_data <= 0) {
			die (STATE_CRITICAL, _("CRITICAL - Server date \"%100s\" unparsable"), server_date);
		} else if (doc_data <= 0) {
			die (STATE_CRITICAL, _("CRITICAL - Document date \"%100s\" unparsable"), document_date);
		} else if (doc_data > srv_data + 30) {
			die (STATE_CRITICAL, _("CRITICAL - Document is %d seconds in the future\n"), (int)doc_data - (int)srv_data);
		} else if (doc_data < srv_data - maximum_age) {
		int n = (srv_data - doc_data);
		if (n > (60 * 60 * 24 * 2))
			die (STATE_CRITICAL,
			  _("CRITICAL - Last modified %.1f days ago\n"),
			  ((float) n) / (60 * 60 * 24));
	else
		die (STATE_CRITICAL,
		    _("CRITICAL - Last modified %d:%02d:%02d ago\n"),
		    n / (60 * 60), (n / 60) % 60, n % 60);
    }

    free (server_date);
    free (document_date);
  }
}

int
get_content_length (const char *headers)
{
	const char *s;
	int content_length = 0;

	s = headers;
	while (*s) {
		const char *field = s;
		const char *value = 0;

		/* Find the end of the header field */
		while (*s && !isspace(*s) && *s != ':')
			s++;

		/* Remember the header value, if any. */
		if (*s == ':')
			value = ++s;

		/* Skip to the end of the header, including continuation lines. */
		while (*s && !(*s == '\n' && (s[1] != ' ' && s[1] != '\t')))
			s++;
		s++;

		/* Process this header. */
		if (value && value > field+2) {
			char *ff = (char *) malloc (value-field);
			char *ss = ff;
			while (field < value-1)
				*ss++ = tolower(*field++);
			*ss++ = 0;

			if (!strcmp (ff, "content-length")) {
				const char *e;
				while (*value && isspace (*value))
					value++;
				for (e = value; *e && *e != '\r' && *e != '\n'; e++)
					;
				ss = (char *) malloc (e - value + 1);
				strncpy (ss, value, e - value);
				ss[e - value] = 0;
				content_length = atoi(ss);
				free (ss);
			}
			free (ff);
		}
	}
	return (content_length);
}

int
check_http (void)
{
	char *msg;
	char *status_line;
	char *status_code;
	char *header;
	char *page;
	char *auth;
	int http_status;
	int i = 0;
	size_t pagesize = 0;
	char *full_page;
	char *buf;
	char *pos;
	long microsec;
	double elapsed_time;
	int page_len = 0;
#ifdef HAVE_SSL
	int sslerr;
#endif

	/* try to connect to the host at the given port number */
#ifdef HAVE_SSL
	if (use_ssl == TRUE) {

		if (connect_SSL () != OK) {
			die (STATE_CRITICAL, _("Unable to open TCP socket\n"));
		}

		if ((server_cert = SSL_get_peer_certificate (ssl)) != NULL) {
			X509_free (server_cert);
		}
		else {
			printf (_("CRITICAL - Cannot retrieve server certificate.\n"));
			return STATE_CRITICAL;
		}

	}
	else {
#endif
		if (my_tcp_connect (server_address, server_port, &sd) != STATE_OK)
			die (STATE_CRITICAL, _("Unable to open TCP socket\n"));
#ifdef HAVE_SSL
	}
#endif

	asprintf (&buf, "%s %s HTTP/1.0\r\n%s\r\n", http_method, server_url, user_agent);

	/* optionally send the host header info */
	if (host_name)
		asprintf (&buf, "%sHost: %s\r\n", buf, host_name);

	/* optionally send any other header tag */
	if (http_opt_headers) {
		for ((pos = strtok(http_opt_headers, INPUT_DELIMITER)); pos; (pos = strtok(NULL, INPUT_DELIMITER)))
			asprintf (&buf, "%s%s\r\n", buf, pos);
	}

	/* optionally send the authentication info */
	if (strlen(user_auth)) {
		auth = base64 (user_auth, strlen (user_auth));
		asprintf (&buf, "%sAuthorization: Basic %s\r\n", buf, auth);
	}

	/* either send http POST data */
	if (http_post_data) {
		if (http_content_type) {
			asprintf (&buf, "%sContent-Type: %s\r\n", buf, http_content_type);
		} else {
			asprintf (&buf, "%sContent-Type: application/x-www-form-urlencoded\r\n", buf);
		}
		
		asprintf (&buf, "%sContent-Length: %i\r\n\r\n", buf, strlen (http_post_data));
		asprintf (&buf, "%s%s%s", buf, http_post_data, CRLF);
	}
	else {
		/* or just a newline so the server knows we're done with the request */
		asprintf (&buf, "%s%s", buf, CRLF);
	}

	if (verbose)
		printf ("%s\n", buf);

#ifdef HAVE_SSL
	if (use_ssl == TRUE) {
		if (SSL_write (ssl, buf, (int)strlen(buf)) == -1) {
			ERR_print_errors_fp (stderr);
			return STATE_CRITICAL;
		}
	}
	else {
#endif
		send (sd, buf, strlen (buf), 0);
#ifdef HAVE_SSL
	}
#endif

	/* fetch the page */
	full_page = strdup("");
	while ((i = my_recv ()) > 0) {
		buffer[i] = '\0';
		asprintf (&full_page, "%s%s", full_page, buffer);
		pagesize += i;

                if (no_body && document_headers_done (full_page)) {
                  i = 0;
                  break;
                }
	}

	if (i < 0 && errno != ECONNRESET) {
#ifdef HAVE_SSL
		if (use_ssl) {
			sslerr=SSL_get_error(ssl, i);
			if ( sslerr == SSL_ERROR_SSL ) {
				die (STATE_WARNING, _("Client Certificate Required\n"));
			} else {
				die (STATE_CRITICAL, _("Error on receive\n"));
			}
		}
		else {
#endif
			die (STATE_CRITICAL, _("Error on receive\n"));
#ifdef HAVE_SSL
		}
#endif
	}

	/* return a CRITICAL status if we couldn't read any data */
	if (pagesize == (size_t) 0)
		die (STATE_CRITICAL, _("No data received %s\n"), timestamp);

	/* close the connection */
	my_close ();

	/* reset the alarm */
	alarm (0);

	/* leave full_page untouched so we can free it later */
	page = full_page;

	if (verbose)
		printf ("%s://%s:%d%s is %d characters\n",
			use_ssl ? "https" : "http", server_address,
			server_port, server_url, pagesize);

	/* find status line and null-terminate it */
	status_line = page;
	page += (size_t) strcspn (page, "\r\n");
	pos = page;
	page += (size_t) strspn (page, "\r\n");
	status_line[strcspn(status_line, "\r\n")] = 0;
	strip (status_line);
	if (verbose)
		printf ("STATUS: %s\n", status_line);

	/* find header info and null-terminate it */
	header = page;
	while (strcspn (page, "\r\n") > 0) {
		page += (size_t) strcspn (page, "\r\n");
		pos = page;
		if ((strspn (page, "\r") == 1 && strspn (page, "\r\n") >= 2) ||
		    (strspn (page, "\n") == 1 && strspn (page, "\r\n") >= 2))
			page += (size_t) 2;
		else
			page += (size_t) 1;
	}
	page += (size_t) strspn (page, "\r\n");
	header[pos - header] = 0;
	if (verbose)
		printf ("**** HEADER ****\n%s\n**** CONTENT ****\n%s\n", header,
                (no_body ? "  [[ skipped ]]" : page));

	/* make sure the status line matches the response we are looking for */
	if (!strstr (status_line, server_expect)) {
		if (server_port == HTTP_PORT)
			asprintf (&msg,
		            _("Invalid HTTP response received from host\n"));
		else
			asprintf (&msg,
			          _("Invalid HTTP response received from host on port %d\n"),
			          server_port);
		die (STATE_CRITICAL, "%s", msg);
	}

	/* Exit here if server_expect was set by user and not default */
	if ( server_expect_yn  )  {
		asprintf (&msg,
		          _("HTTP OK: Status line output matched \"%s\"\n"),
		          server_expect);
		if (verbose)
			printf ("%s\n",msg);
	}
	else {
		/* Status-Line = HTTP-Version SP Status-Code SP Reason-Phrase CRLF */
		/* HTTP-Version   = "HTTP" "/" 1*DIGIT "." 1*DIGIT */
    /* Status-Code = 3 DIGITS */

		status_code = strchr (status_line, ' ') + sizeof (char);
		if (strspn (status_code, "1234567890") != 3)
 			die (STATE_CRITICAL, _("HTTP CRITICAL: Invalid Status Line (%s)\n"), status_line);

		http_status = atoi (status_code);

		/* check the return code */

		if (http_status >= 600 || http_status < 100)
			die (STATE_CRITICAL, _("HTTP CRITICAL: Invalid Status (%s)\n"), status_line);

		/* server errors result in a critical state */
		else if (http_status >= 500)
 			die (STATE_CRITICAL, _("HTTP CRITICAL: %s\n"), status_line);

		/* client errors result in a warning state */
		else if (http_status >= 400)
			die (STATE_WARNING, _("HTTP WARNING: %s\n"), status_line);

		/* check redirected page if specified */
		else if (http_status >= 300) {

			if (onredirect == STATE_DEPENDENT)
				redir (header, status_line);
			else if (onredirect == STATE_UNKNOWN)
				printf (_("UNKNOWN"));
			else if (onredirect == STATE_OK)
				printf (_("OK"));
			else if (onredirect == STATE_WARNING)
				printf (_("WARNING"));
			else if (onredirect == STATE_CRITICAL)
				printf (_("CRITICAL"));
			microsec = deltime (tv);
			elapsed_time = (double)microsec / 1.0e6;
			die (onredirect,
			     _(" - %s - %.3f second response time %s%s|%s %s\n"),
			     status_line, elapsed_time, timestamp,
			     (display_html ? "</A>" : ""),
					 perfd_time (elapsed_time), perfd_size (pagesize));
		} /* end if (http_status >= 300) */

	} /* end else (server_expect_yn)  */
		
        if (maximum_age >= 0) {
          check_document_dates (header);
        }

	/* check elapsed time */
	microsec = deltime (tv);
	elapsed_time = (double)microsec / 1.0e6;
	asprintf (&msg,
	          _("HTTP WARNING: %s - %.3f second response time %s%s|%s %s\n"),
	          status_line, elapsed_time, timestamp,
	          (display_html ? "</A>" : ""),
						perfd_time (elapsed_time), perfd_size (pagesize));
	if (check_critical_time == TRUE && elapsed_time > critical_time)
		die (STATE_CRITICAL, "%s", msg);
	if (check_warning_time == TRUE && elapsed_time > warning_time)
		die (STATE_WARNING, "%s", msg);

	/* Page and Header content checks go here */
	/* these checks should be last */

	if (strlen (string_expect)) {
		if (strstr (page, string_expect)) {
			printf (_("HTTP OK %s - %.3f second response time %s%s|%s %s\n"),
			        status_line, elapsed_time,
			        timestamp, (display_html ? "</A>" : ""),
			        perfd_time (elapsed_time), perfd_size (pagesize));
			exit (STATE_OK);
		}
		else {
			printf (_("CRITICAL - string not found%s|%s %s\n"),
			        (display_html ? "</A>" : ""),
			        perfd_time (elapsed_time), perfd_size (pagesize));
			exit (STATE_CRITICAL);
		}
	}
#ifdef HAVE_REGEX_H
	if (strlen (regexp)) {
		errcode = regexec (&preg, page, REGS, pmatch, 0);
		if (errcode == 0) {
			printf (_("HTTP OK %s - %.3f second response time %s%s|%s %s\n"),
			        status_line, elapsed_time,
			        timestamp, (display_html ? "</A>" : ""),
			        perfd_time (elapsed_time), perfd_size (pagesize));
			exit (STATE_OK);
		}
		else {
			if (errcode == REG_NOMATCH) {
				printf (_("CRITICAL - pattern not found%s|%s %s\n"),
				        (display_html ? "</A>" : ""),
				        perfd_time (elapsed_time), perfd_size (pagesize));
				exit (STATE_CRITICAL);
			}
			else {
				regerror (errcode, &preg, errbuf, MAX_INPUT_BUFFER);
				printf (_("CRITICAL - Execute Error: %s\n"), errbuf);
				exit (STATE_CRITICAL);
			}
		}
	}
#endif

	/* make sure the page is of an appropriate size */
	/* page_len = get_content_length(header); */
	page_len = pagesize;
	if ((max_page_len > 0) && (page_len > max_page_len)) {
		printf (_("HTTP WARNING: page size %d too large%s|%s\n"),
			page_len, (display_html ? "</A>" : ""), perfd_size (page_len) );
		exit (STATE_WARNING);
	} else if ((min_page_len > 0) && (page_len < min_page_len)) {
		printf (_("HTTP WARNING: page size %d too small%s|%s\n"),
			page_len, (display_html ? "</A>" : ""), perfd_size (page_len) );
		exit (STATE_WARNING);
	}
	/* We only get here if all tests have been passed */
	asprintf (&msg, _("HTTP OK %s - %d bytes in %.3f seconds %s%s|%s %s\n"),
	          status_line, page_len, elapsed_time,
	          timestamp, (display_html ? "</A>" : ""),
						perfd_time (elapsed_time), perfd_size (page_len));
	die (STATE_OK, "%s", msg);
	return STATE_UNKNOWN;
}



/* per RFC 2396 */
#define HDR_LOCATION "%*[Ll]%*[Oo]%*[Cc]%*[Aa]%*[Tt]%*[Ii]%*[Oo]%*[Nn]: "
#define URI_HTTP "%[HTPShtps]://"
#define URI_HOST "%[-.abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789]"
#define URI_PORT ":%[0123456789]"
#define URI_PATH "%[-_.!~*'();/?:@&=+$,%#abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789]"
#define HD1 URI_HTTP URI_HOST URI_PORT URI_PATH
#define HD2 URI_HTTP URI_HOST URI_PATH
#define HD3 URI_HTTP URI_HOST URI_PORT
#define HD4 URI_HTTP URI_HOST
#define HD5 URI_PATH

void
redir (char *pos, char *status_line)
{
	int i = 0;
	char *x;
	char xx[2];
	char type[6];
	char *addr;
	char port[6];
	char *url;

	addr = malloc (MAX_IPV4_HOSTLENGTH + 1);
	if (addr == NULL)
		die (STATE_UNKNOWN, _("Could not allocate addr\n"));
	
	url = malloc (strcspn (pos, "\r\n"));
	if (url == NULL)
		die (STATE_UNKNOWN, _("Could not allocate url\n"));

	while (pos) {

		if (sscanf (pos, "%[Ll]%*[Oo]%*[Cc]%*[Aa]%*[Tt]%*[Ii]%*[Oo]%*[Nn]:%n", xx, &i) < 1) {

			pos += (size_t) strcspn (pos, "\r\n");
			pos += (size_t) strspn (pos, "\r\n");
			if (strlen(pos) == 0) 
				die (STATE_UNKNOWN,
						 _("UNKNOWN - Could not find redirect location - %s%s\n"),
						 status_line, (display_html ? "</A>" : ""));
			continue;
		}

		pos += i;
		pos += strspn (pos, " \t\r\n");

		url = realloc (url, strcspn (pos, "\r\n"));
		if (url == NULL)
			die (STATE_UNKNOWN, _("could not allocate url\n"));

		/* URI_HTTP, URI_HOST, URI_PORT, URI_PATH */
		if (sscanf (pos, HD1, type, addr, port, url) == 4) {
			use_ssl = server_type_check (type);
			i = atoi (port);
		}

		/* URI_HTTP URI_HOST URI_PATH */
		else if (sscanf (pos, HD2, type, addr, url) == 3 ) { 
			use_ssl = server_type_check (type);
			i = server_port_check (use_ssl);
		}

		/* URI_HTTP URI_HOST URI_PORT */
		else if(sscanf (pos, HD3, type, addr, port) == 3) {
			strcpy (url, HTTP_URL);
			use_ssl = server_type_check (type);
			i = atoi (port);
		}

		/* URI_HTTP URI_HOST */
		else if(sscanf (pos, HD4, type, addr) == 2) {
			strcpy (url, HTTP_URL);
			use_ssl = server_type_check (type);
			i = server_port_check (use_ssl);
		}

		/* URI_PATH */
		else if (sscanf (pos, HD5, url) == 1) {
			/* relative url */
			if ((url[0] != '/')) {
				if ((x = strrchr(server_url, '/')))
					*x = '\0';
				asprintf (&url, "%s/%s", server_url, url);
			}
			i = server_port;
			strcpy (type, server_type);
			strcpy (addr, host_name);
		} 					

		else {
			die (STATE_UNKNOWN,
					 _("UNKNOWN - Could not parse redirect location - %s%s\n"),
					 pos, (display_html ? "</A>" : ""));
		}

		break;

	} /* end while (pos) */

	if (++redir_depth > max_depth)
		die (STATE_WARNING,
		     _("WARNING - maximum redirection depth %d exceeded - %s://%s:%d%s%s\n"),
		     max_depth, type, addr, i, url, (display_html ? "</A>" : ""));

	if (server_port==i &&
	    !strcmp(server_address, addr) &&
	    (host_name && !strcmp(host_name, addr)) &&
	    !strcmp(server_url, url))
		die (STATE_WARNING,
		     _("WARNING - redirection creates an infinite loop - %s://%s:%d%s%s\n"),
		     type, addr, i, url, (display_html ? "</A>" : ""));

	server_port = i;
	strcpy (server_type, type);

	free (host_name);
	host_name = strdup (addr);

	free (server_address);
	server_address = strdup (addr);

	free (server_url);
	server_url = strdup (url);

	check_http ();
}



int
server_type_check (const char *type)
{
	if (strcmp (type, "https"))
		return FALSE;
	else
		return TRUE;
}

int
server_port_check (int ssl_flag)
{
	if (ssl_flag)
		return HTTPS_PORT;
	else
		return HTTP_PORT;
}



#ifdef HAVE_SSL
int connect_SSL (void)
{
	SSL_METHOD *meth;

	asprintf (&randbuff, "%s", "qwertyuiopasdfghjklqwertyuiopasdfghjkl");
	RAND_seed (randbuff, (int)strlen(randbuff));
	if (verbose)
		printf(_("SSL seeding: %s\n"), (RAND_status()==1 ? _("OK") : _("Failed")) );

	/* Initialize SSL context */
	SSLeay_add_ssl_algorithms ();
	meth = SSLv23_client_method ();
	SSL_load_error_strings ();
	if ((ctx = SSL_CTX_new (meth)) == NULL) {
		printf (_("CRITICAL -  Cannot create SSL context.\n"));
		return STATE_CRITICAL;
	}

	/* Initialize alarm signal handling */
	signal (SIGALRM, socket_timeout_alarm_handler);

	/* Set socket timeout */
	alarm (socket_timeout);

	/* Save start time */
	gettimeofday (&tv, NULL);

	/* Make TCP connection */
	if (my_tcp_connect (server_address, server_port, &sd) == STATE_OK) {
		/* Do the SSL handshake */
		if ((ssl = SSL_new (ctx)) != NULL) {
			SSL_set_cipher_list(ssl, "ALL");
			SSL_set_fd (ssl, sd);
			if (SSL_connect (ssl) != -1)
				return OK;
			ERR_print_errors_fp (stderr);
		}
		else {
			printf (_("CRITICAL - Cannot initiate SSL handshake.\n"));
		}
		SSL_free (ssl);
	}

	SSL_CTX_free (ctx);
	close (sd);

	return STATE_CRITICAL;
}
#endif



#ifdef HAVE_SSL
int
check_certificate (X509 ** certificate)
{
	ASN1_STRING *tm;
	int offset;
	struct tm stamp;
	int days_left;


	/* Retrieve timestamp of certificate */
	tm = X509_get_notAfter (*certificate);

	/* Generate tm structure to process timestamp */
	if (tm->type == V_ASN1_UTCTIME) {
		if (tm->length < 10) {
			printf (_("CRITICAL - Wrong time format in certificate.\n"));
			return STATE_CRITICAL;
		}
		else {
			stamp.tm_year = (tm->data[0] - '0') * 10 + (tm->data[1] - '0');
			if (stamp.tm_year < 50)
				stamp.tm_year += 100;
			offset = 0;
		}
	}
	else {
		if (tm->length < 12) {
			printf (_("CRITICAL - Wrong time format in certificate.\n"));
			return STATE_CRITICAL;
		}
		else {
			stamp.tm_year =
				(tm->data[0] - '0') * 1000 + (tm->data[1] - '0') * 100 +
				(tm->data[2] - '0') * 10 + (tm->data[3] - '0');
			stamp.tm_year -= 1900;
			offset = 2;
		}
	}
	stamp.tm_mon =
		(tm->data[2 + offset] - '0') * 10 + (tm->data[3 + offset] - '0') - 1;
	stamp.tm_mday =
		(tm->data[4 + offset] - '0') * 10 + (tm->data[5 + offset] - '0');
	stamp.tm_hour =
		(tm->data[6 + offset] - '0') * 10 + (tm->data[7 + offset] - '0');
	stamp.tm_min =
		(tm->data[8 + offset] - '0') * 10 + (tm->data[9 + offset] - '0');
	stamp.tm_sec = 0;
	stamp.tm_isdst = -1;

	days_left = (mktime (&stamp) - time (NULL)) / 86400;
	snprintf
		(timestamp, 17, "%02d/%02d/%04d %02d:%02d",
		 stamp.tm_mon + 1,
		 stamp.tm_mday, stamp.tm_year + 1900, stamp.tm_hour, stamp.tm_min);

	if (days_left > 0 && days_left <= days_till_exp) {
		printf (_("WARNING - Certificate expires in %d day(s) (%s).\n"), days_left, timestamp);
		return STATE_WARNING;
	}
	if (days_left < 0) {
		printf (_("CRITICAL - Certificate expired on %s.\n"), timestamp);
		return STATE_CRITICAL;
	}

	if (days_left == 0) {
		printf (_("WARNING - Certificate expires today (%s).\n"), timestamp);
		return STATE_WARNING;
	}

	printf (_("OK - Certificate will expire on %s.\n"), timestamp);

	return STATE_OK;
}
#endif



char *perfd_time (double elapsed_time)
{
	return fperfdata ("time", elapsed_time, "s",
	          check_warning_time, warning_time,
	          check_critical_time, critical_time,
									 TRUE, 0, FALSE, 0);
}



char *perfd_size (int page_len)
{
	return perfdata ("size", page_len, "B",
	          (min_page_len>0?TRUE:FALSE), min_page_len,
	          (min_page_len>0?TRUE:FALSE), 0,
	          TRUE, 0, FALSE, 0);
}



int
my_recv (void)
{
	int i;
#ifdef HAVE_SSL
	if (use_ssl) {
		i = SSL_read (ssl, buffer, MAX_INPUT_BUFFER - 1);
	}
	else {
		i = recv (sd, buffer, MAX_INPUT_BUFFER - 1, 0);
	}
#else
	i = recv (sd, buffer, MAX_INPUT_BUFFER - 1, 0);
#endif
	return i;
}



int
my_close (void)
{
#ifdef HAVE_SSL
	if (use_ssl == TRUE) {
		SSL_shutdown (ssl);
		SSL_free (ssl);
		SSL_CTX_free (ctx);
		return 0;
	}
	else {
#endif
		return close (sd);
#ifdef HAVE_SSL
	}
#endif
}



void
print_help (void)
{
	print_revision (progname, revision);

	printf ("Copyright (c) 1999 Ethan Galstad <nagios@nagios.org>\n");
	printf (COPYRIGHT, copyright, email);

	printf (_("\
This plugin tests the HTTP service on the specified host. It can test\n\
normal (http) and secure (https) servers, follow redirects, search for\n\
strings and regular expressions, check connection times, and report on\n\
certificate expiration times.\n\n"));

	print_usage ();

	printf (_("NOTE: One or both of -H and -I must be specified\n"));

	printf (_(UT_HELP_VRSN));

	printf (_("\
 -H, --hostname=ADDRESS\n\
    Host name argument for servers using host headers (virtual host)\n\
    Append a port to include it in the header (eg: example.com:5000)\n\
 -I, --IP-address=ADDRESS\n\
   IP address or name (use numeric address if possible to bypass DNS lookup).\n\
 -p, --port=INTEGER\n\
   Port number (default: %d)\n"), HTTP_PORT);

	printf (_(UT_IPv46));

#ifdef HAVE_SSL
	printf (_("\
 -S, --ssl\n\
    Connect via SSL\n\
 -C, --certificate=INTEGER\n\
    Minimum number of days a certificate has to be valid.\n\
    (when this option is used the url is not checked.)\n"));
#endif

	printf (_("\
 -e, --expect=STRING\n\
   String to expect in first (status) line of server response (default: %s)\n\
   If specified skips all other status line logic (ex: 3xx, 4xx, 5xx processing)\n\
 -s, --string=STRING\n\
   String to expect in the content\n\
 -u, --url=PATH\n\
   URL to GET or POST (default: /)\n\
 -P, --post=STRING\n\
   URL encoded http POST data\n\
 -N, --no-body\n\
   Don't wait for document body: stop reading after headers.\n\
   (Note that this still does an HTTP GET or POST, not a HEAD.)\n\
 -M, --max-age=SECONDS\n\
   Warn if document is more than SECONDS old. the number can also be of \n\
   the form \"10m\" for minutes, \"10h\" for hours, or \"10d\" for days.\n\
 -T, --content-type=STRING\n\
   specify Content-Type header media type when POSTing\n"), HTTP_EXPECT);

#ifdef HAVE_REGEX_H
	printf (_("\
 -l, --linespan\n\
    Allow regex to span newlines (must precede -r or -R)\n\
 -r, --regex, --ereg=STRING\n\
    Search page for regex STRING\n\
 -R, --eregi=STRING\n\
    Search page for case-insensitive regex STRING\n"));
#endif

	printf (_("\
 -a, --authorization=AUTH_PAIR\n\
   Username:password on sites with basic authentication\n\
 -A, --useragent=STRING\n\
   String to be sent in http header as \"User Agent\"\n\
 -k, --header=STRING\n\
   Any other tags to be sent in http header, separated by semicolon\n\
 -L, --link=URL\n\
   Wrap output in HTML link (obsoleted by urlize)\n\
 -f, --onredirect=<ok|warning|critical|follow>\n\
   How to handle redirected pages\n\
 -m, --pagesize=INTEGER<:INTEGER>\n\
   Minimum page size required (bytes) : Maximum page size required (bytes)\n"));

	printf (_(UT_WARN_CRIT));

	printf (_(UT_TIMEOUT), DEFAULT_SOCKET_TIMEOUT);

	printf (_(UT_VERBOSE));

					printf (_("\
This plugin will attempt to open an HTTP connection with the host. Successful\n\
connects return STATE_OK, refusals and timeouts return STATE_CRITICAL, other\n\
errors return STATE_UNKNOWN.  Successful connects, but incorrect reponse\n\
messages from the host result in STATE_WARNING return values.  If you are\n\
checking a virtual server that uses 'host headers' you must supply the FQDN\n\
(fully qualified domain name) as the [host_name] argument.\n"));

#ifdef HAVE_SSL
	printf (_("\n\
This plugin can also check whether an SSL enabled web server is able to\n\
serve content (optionally within a specified time) or whether the X509 \n\
certificate is still valid for the specified number of days.\n"));
	printf (_("\n\
CHECK CONTENT: check_http -w 5 -c 10 --ssl www.verisign.com\n\n\
When the 'www.verisign.com' server returns its content within 5 seconds, a\n\
STATE_OK will be returned. When the server returns its content but exceeds\n\
the 5-second threshold, a STATE_WARNING will be returned. When an error occurs,\n\
a STATE_CRITICAL will be returned.\n\n"));

	printf (_("\
CHECK CERTIFICATE: check_http www.verisign.com -C 14\n\n\
When the certificate of 'www.verisign.com' is valid for more than 14 days, a\n\
STATE_OK is returned. When the certificate is still valid, but for less than\n\
14 days, a STATE_WARNING is returned. A STATE_CRITICAL will be returned when\n\
the certificate is expired.\n"));
#endif

	printf (_(UT_SUPPORT));

}



void
print_usage (void)
{
	printf ("\
Usage: %s -H <vhost> | -I <IP-address> [-u <uri>] [-p <port>]\n\
                  [-w <warn time>] [-c <critical time>] [-t <timeout>] [-L]\n\
                  [-a auth] [-f <ok | warn | critcal | follow>] [-e <expect>]\n\
                  [-s string] [-l] [-r <regex> | -R <case-insensitive regex>]\n\
                  [-P string] [-m <min_pg_size>:<max_pg_size>] [-4|-6] [-N] \n\
                  [-M <age>] [-A string] [-k string]\n", progname);
}