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
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421
2422
2423
2424
2425
2426
2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449
2450
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
2464
2465
2466
2467
2468
2469
2470
2471
2472
2473
2474
2475
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485
2486
2487
2488
2489
2490
2491
2492
2493
2494
2495
2496
2497
2498
2499
2500
2501
2502
2503
2504
2505
2506
2507
2508
2509
2510
2511
2512
2513
2514
2515
2516
2517
2518
2519
2520
2521
2522
2523
2524
2525
2526
2527
2528
2529
2530
2531
2532
2533
2534
2535
2536
2537
2538
2539
2540
2541
2542
2543
2544
2545
2546
2547
2548
2549
2550
2551
2552
2553
2554
2555
2556
2557
2558
2559
2560
2561
2562
2563
2564
2565
2566
2567
2568
2569
2570
2571
2572
2573
2574
2575
2576
2577
2578
2579
2580
2581
2582
2583
2584
2585
2586
2587
2588
2589
2590
2591
2592
2593
2594
2595
2596
2597
2598
2599
2600
2601
2602
2603
2604
2605
2606
2607
2608
2609
2610
2611
2612
2613
2614
2615
2616
2617
2618
2619
2620
2621
2622
2623
2624
2625
2626
2627
2628
2629
2630
2631
2632
2633
2634
2635
2636
2637
2638
2639
2640
2641
2642
2643
2644
2645
2646
2647
2648
2649
2650
2651
2652
2653
2654
2655
2656
2657
2658
2659
2660
2661
2662
2663
2664
2665
2666
2667
2668
2669
2670
2671
2672
2673
2674
2675
|
<?php
/**
* @file CAS/client.php
* Main class of the phpCAS library
*/
// include internationalization stuff
include_once(dirname(__FILE__).'/languages/languages.php');
// include PGT storage classes
include_once(dirname(__FILE__).'/PGTStorage/pgt-main.php');
/**
* @class CASClient
* The CASClient class is a client interface that provides CAS authentication
* to PHP applications.
*
* @author Pascal Aubry <pascal.aubry at univ-rennes1.fr>
*/
class CASClient
{
// XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
// XX XX
// XX CONFIGURATION XX
// XX XX
// XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
// ########################################################################
// HTML OUTPUT
// ########################################################################
/**
* @addtogroup internalOutput
* @{
*/
/**
* This method filters a string by replacing special tokens by appropriate values
* and prints it. The corresponding tokens are taken into account:
* - __CAS_VERSION__
* - __PHPCAS_VERSION__
* - __SERVER_BASE_URL__
*
* Used by CASClient::PrintHTMLHeader() and CASClient::printHTMLFooter().
*
* @param $str the string to filter and output
*
* @private
*/
function HTMLFilterOutput($str)
{
$str = str_replace('__CAS_VERSION__',$this->getServerVersion(),$str);
$str = str_replace('__PHPCAS_VERSION__',phpCAS::getVersion(),$str);
$str = str_replace('__SERVER_BASE_URL__',$this->getServerBaseURL(),$str);
echo $str;
}
/**
* A string used to print the header of HTML pages. Written by CASClient::setHTMLHeader(),
* read by CASClient::printHTMLHeader().
*
* @hideinitializer
* @private
* @see CASClient::setHTMLHeader, CASClient::printHTMLHeader()
*/
var $_output_header = '';
/**
* This method prints the header of the HTML output (after filtering). If
* CASClient::setHTMLHeader() was not used, a default header is output.
*
* @param $title the title of the page
*
* @see HTMLFilterOutput()
* @private
*/
function printHTMLHeader($title)
{
$this->HTMLFilterOutput(str_replace('__TITLE__',
$title,
(empty($this->_output_header)
? '<html><head><title>__TITLE__</title></head><body><h1>__TITLE__</h1>'
: $this->_output_header)
)
);
}
/**
* A string used to print the footer of HTML pages. Written by CASClient::setHTMLFooter(),
* read by printHTMLFooter().
*
* @hideinitializer
* @private
* @see CASClient::setHTMLFooter, CASClient::printHTMLFooter()
*/
var $_output_footer = '';
/**
* This method prints the footer of the HTML output (after filtering). If
* CASClient::setHTMLFooter() was not used, a default footer is output.
*
* @see HTMLFilterOutput()
* @private
*/
function printHTMLFooter()
{
$this->HTMLFilterOutput(empty($this->_output_footer)
?('<hr><address>phpCAS __PHPCAS_VERSION__ '.$this->getString(CAS_STR_USING_SERVER).' <a href="__SERVER_BASE_URL__">__SERVER_BASE_URL__</a> (CAS __CAS_VERSION__)</a></address></body></html>')
:$this->_output_footer);
}
/**
* This method set the HTML header used for all outputs.
*
* @param $header the HTML header.
*
* @public
*/
function setHTMLHeader($header)
{
$this->_output_header = $header;
}
/**
* This method set the HTML footer used for all outputs.
*
* @param $footer the HTML footer.
*
* @public
*/
function setHTMLFooter($footer)
{
$this->_output_footer = $footer;
}
/** @} */
// ########################################################################
// INTERNATIONALIZATION
// ########################################################################
/**
* @addtogroup internalLang
* @{
*/
/**
* A string corresponding to the language used by phpCAS. Written by
* CASClient::setLang(), read by CASClient::getLang().
* @note debugging information is always in english (debug purposes only).
*
* @hideinitializer
* @private
* @sa CASClient::_strings, CASClient::getString()
*/
var $_lang = '';
/**
* This method returns the language used by phpCAS.
*
* @return a string representing the language
*
* @private
*/
function getLang()
{
if ( empty($this->_lang) )
$this->setLang(PHPCAS_LANG_DEFAULT);
return $this->_lang;
}
/**
* array containing the strings used by phpCAS. Written by CASClient::setLang(), read by
* CASClient::getString() and used by CASClient::setLang().
*
* @note This array is filled by instructions in CAS/languages/<$this->_lang>.php
*
* @private
* @see CASClient::_lang, CASClient::getString(), CASClient::setLang(), CASClient::getLang()
*/
var $_strings;
/**
* This method returns a string depending on the language.
*
* @param $str the index of the string in $_string.
*
* @return the string corresponding to $index in $string.
*
* @private
*/
function getString($str)
{
// call CASclient::getLang() to be sure the language is initialized
$this->getLang();
if ( !isset($this->_strings[$str]) ) {
trigger_error('string `'.$str.'\' not defined for language `'.$this->getLang().'\'',E_USER_ERROR);
}
return $this->_strings[$str];
}
/**
* This method is used to set the language used by phpCAS.
* @note Can be called only once.
*
* @param $lang a string representing the language.
*
* @public
* @sa CAS_LANG_FRENCH, CAS_LANG_ENGLISH
*/
function setLang($lang)
{
// include the corresponding language file
include_once(dirname(__FILE__).'/languages/'.$lang.'.php');
if ( !is_array($this->_strings) ) {
trigger_error('language `'.$lang.'\' is not implemented',E_USER_ERROR);
}
$this->_lang = $lang;
}
/** @} */
// ########################################################################
// CAS SERVER CONFIG
// ########################################################################
/**
* @addtogroup internalConfig
* @{
*/
/**
* a record to store information about the CAS server.
* - $_server["version"]: the version of the CAS server
* - $_server["hostname"]: the hostname of the CAS server
* - $_server["port"]: the port the CAS server is running on
* - $_server["uri"]: the base URI the CAS server is responding on
* - $_server["base_url"]: the base URL of the CAS server
* - $_server["login_url"]: the login URL of the CAS server
* - $_server["service_validate_url"]: the service validating URL of the CAS server
* - $_server["proxy_url"]: the proxy URL of the CAS server
* - $_server["proxy_validate_url"]: the proxy validating URL of the CAS server
* - $_server["logout_url"]: the logout URL of the CAS server
*
* $_server["version"], $_server["hostname"], $_server["port"] and $_server["uri"]
* are written by CASClient::CASClient(), read by CASClient::getServerVersion(),
* CASClient::getServerHostname(), CASClient::getServerPort() and CASClient::getServerURI().
*
* The other fields are written and read by CASClient::getServerBaseURL(),
* CASClient::getServerLoginURL(), CASClient::getServerServiceValidateURL(),
* CASClient::getServerProxyValidateURL() and CASClient::getServerLogoutURL().
*
* @hideinitializer
* @private
*/
var $_server = array(
'version' => -1,
'hostname' => 'none',
'port' => -1,
'uri' => 'none'
);
/**
* This method is used to retrieve the version of the CAS server.
* @return the version of the CAS server.
* @private
*/
function getServerVersion()
{
return $this->_server['version'];
}
/**
* This method is used to retrieve the hostname of the CAS server.
* @return the hostname of the CAS server.
* @private
*/
function getServerHostname()
{ return $this->_server['hostname']; }
/**
* This method is used to retrieve the port of the CAS server.
* @return the port of the CAS server.
* @private
*/
function getServerPort()
{ return $this->_server['port']; }
/**
* This method is used to retrieve the URI of the CAS server.
* @return a URI.
* @private
*/
function getServerURI()
{ return $this->_server['uri']; }
/**
* This method is used to retrieve the base URL of the CAS server.
* @return a URL.
* @private
*/
function getServerBaseURL()
{
// the URL is build only when needed
if ( empty($this->_server['base_url']) ) {
$this->_server['base_url'] = 'https://'
.$this->getServerHostname()
.':'
.$this->getServerPort()
.$this->getServerURI();
}
return $this->_server['base_url'];
}
/**
* This method is used to retrieve the login URL of the CAS server.
* @param $gateway true to check authentication, false to force it
* @param $renew true to force the authentication with the CAS server
* NOTE : It is recommended that CAS implementations ignore the
"gateway" parameter if "renew" is set
* @return a URL.
* @private
*/
function getServerLoginURL($gateway=false,$renew=false) {
phpCAS::traceBegin();
// the URL is build only when needed
if ( empty($this->_server['login_url']) ) {
$this->_server['login_url'] = $this->getServerBaseURL();
$this->_server['login_url'] .= 'login?service=';
// $this->_server['login_url'] .= preg_replace('/&/','%26',$this->getURL());
$this->_server['login_url'] .= urlencode($this->getURL());
if($renew) {
// It is recommended that when the "renew" parameter is set, its value be "true"
$this->_server['login_url'] .= '&renew=true';
} elseif ($gateway) {
// It is recommended that when the "gateway" parameter is set, its value be "true"
$this->_server['login_url'] .= '&gateway=true';
}
}
phpCAS::traceEnd($this->_server['login_url']);
return $this->_server['login_url'];
}
/**
* This method sets the login URL of the CAS server.
* @param $url the login URL
* @private
* @since 0.4.21 by Wyman Chan
*/
function setServerLoginURL($url)
{
return $this->_server['login_url'] = $url;
}
/**
* This method sets the serviceValidate URL of the CAS server.
* @param $url the serviceValidate URL
* @private
* @since 1.1.0 by Joachim Fritschi
*/
function setServerServiceValidateURL($url)
{
return $this->_server['service_validate_url'] = $url;
}
/**
* This method sets the proxyValidate URL of the CAS server.
* @param $url the proxyValidate URL
* @private
* @since 1.1.0 by Joachim Fritschi
*/
function setServerProxyValidateURL($url)
{
return $this->_server['proxy_validate_url'] = $url;
}
/**
* This method sets the samlValidate URL of the CAS server.
* @param $url the samlValidate URL
* @private
* @since 1.1.0 by Joachim Fritschi
*/
function setServerSamlValidateURL($url)
{
return $this->_server['saml_validate_url'] = $url;
}
/**
* This method is used to retrieve the service validating URL of the CAS server.
* @return a URL.
* @private
*/
function getServerServiceValidateURL()
{
// the URL is build only when needed
if ( empty($this->_server['service_validate_url']) ) {
switch ($this->getServerVersion()) {
case CAS_VERSION_1_0:
$this->_server['service_validate_url'] = $this->getServerBaseURL().'validate';
break;
case CAS_VERSION_2_0:
$this->_server['service_validate_url'] = $this->getServerBaseURL().'serviceValidate';
break;
}
}
// return $this->_server['service_validate_url'].'?service='.preg_replace('/&/','%26',$this->getURL());
return $this->_server['service_validate_url'].'?service='.urlencode($this->getURL());
}
/**
* This method is used to retrieve the SAML validating URL of the CAS server.
* @return a URL.
* @private
*/
function getServerSamlValidateURL()
{
phpCAS::traceBegin();
// the URL is build only when needed
if ( empty($this->_server['saml_validate_url']) ) {
switch ($this->getServerVersion()) {
case SAML_VERSION_1_1:
$this->_server['saml_validate_url'] = $this->getServerBaseURL().'samlValidate';
break;
}
}
phpCAS::traceEnd($this->_server['saml_validate_url'].'?TARGET='.urlencode($this->getURL()));
return $this->_server['saml_validate_url'].'?TARGET='.urlencode($this->getURL());
}
/**
* This method is used to retrieve the proxy validating URL of the CAS server.
* @return a URL.
* @private
*/
function getServerProxyValidateURL()
{
// the URL is build only when needed
if ( empty($this->_server['proxy_validate_url']) ) {
switch ($this->getServerVersion()) {
case CAS_VERSION_1_0:
$this->_server['proxy_validate_url'] = '';
break;
case CAS_VERSION_2_0:
$this->_server['proxy_validate_url'] = $this->getServerBaseURL().'proxyValidate';
break;
}
}
// return $this->_server['proxy_validate_url'].'?service='.preg_replace('/&/','%26',$this->getURL());
return $this->_server['proxy_validate_url'].'?service='.urlencode($this->getURL());
}
/**
* This method is used to retrieve the proxy URL of the CAS server.
* @return a URL.
* @private
*/
function getServerProxyURL()
{
// the URL is build only when needed
if ( empty($this->_server['proxy_url']) ) {
switch ($this->getServerVersion()) {
case CAS_VERSION_1_0:
$this->_server['proxy_url'] = '';
break;
case CAS_VERSION_2_0:
$this->_server['proxy_url'] = $this->getServerBaseURL().'proxy';
break;
}
}
return $this->_server['proxy_url'];
}
/**
* This method is used to retrieve the logout URL of the CAS server.
* @return a URL.
* @private
*/
function getServerLogoutURL()
{
// the URL is build only when needed
if ( empty($this->_server['logout_url']) ) {
$this->_server['logout_url'] = $this->getServerBaseURL().'logout';
}
return $this->_server['logout_url'];
}
/**
* This method sets the logout URL of the CAS server.
* @param $url the logout URL
* @private
* @since 0.4.21 by Wyman Chan
*/
function setServerLogoutURL($url)
{
return $this->_server['logout_url'] = $url;
}
/**
* An array to store extra curl options.
*/
var $_curl_options = array();
/**
* This method is used to set additional user curl options.
*/
function setExtraCurlOption($key, $value)
{
$this->_curl_options[$key] = $value;
}
/**
* This method checks to see if the request is secured via HTTPS
* @return true if https, false otherwise
* @private
*/
function isHttps() {
//if ( isset($_SERVER['HTTPS']) && !empty($_SERVER['HTTPS']) ) {
//0.4.24 by Hinnack
if ( isset($_SERVER['HTTPS']) && !empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] == 'on') {
return true;
} else {
return false;
}
}
// ########################################################################
// CONSTRUCTOR
// ########################################################################
/**
* CASClient constructor.
*
* @param $server_version the version of the CAS server
* @param $proxy TRUE if the CAS client is a CAS proxy, FALSE otherwise
* @param $server_hostname the hostname of the CAS server
* @param $server_port the port the CAS server is running on
* @param $server_uri the URI the CAS server is responding on
* @param $start_session Have phpCAS start PHP sessions (default true)
*
* @return a newly created CASClient object
*
* @public
*/
function CASClient(
$server_version,
$proxy,
$server_hostname,
$server_port,
$server_uri,
$start_session = true) {
phpCAS::traceBegin();
// the redirect header() call and DOM parsing code from domxml-php4-php5.php won't work in PHP4 compatibility mode
if (version_compare(PHP_VERSION,'5','>=') && ini_get('zend.ze1_compatibility_mode')) {
phpCAS::error('phpCAS cannot support zend.ze1_compatibility_mode. Sorry.');
}
// skip Session Handling for logout requests and if don't want it'
if ($start_session && !$this->isLogoutRequest()) {
phpCAS::trace("Starting session handling");
// Check for Tickets from the CAS server
if (empty($_GET['ticket'])){
phpCAS::trace("No ticket found");
// only create a session if necessary
if (!isset($_SESSION)) {
phpCAS::trace("No session found, creating new session");
session_start();
}
}else{
phpCAS::trace("Ticket found");
// We have to copy any old data before renaming the session
if (isset($_SESSION)) {
phpCAS::trace("Old active session found, saving old data and destroying session");
$old_session = $_SESSION;
session_destroy();
}else{
session_start();
phpCAS::trace("Starting possible old session to copy variables");
$old_session = $_SESSION;
session_destroy();
}
// set up a new session, of name based on the ticket
$session_id = preg_replace('/[^\w]/','',$_GET['ticket']);
phpCAS::LOG("Session ID: " . $session_id);
session_id($session_id);
session_start();
// restore old session vars
if(isset($old_session)){
phpCAS::trace("Restoring old session vars");
$_SESSION = $old_session;
}
}
}else{
phpCAS::trace("Skipping session creation");
}
// are we in proxy mode ?
$this->_proxy = $proxy;
//check version
switch ($server_version) {
case CAS_VERSION_1_0:
if ( $this->isProxy() )
phpCAS::error('CAS proxies are not supported in CAS '
.$server_version);
break;
case CAS_VERSION_2_0:
break;
case SAML_VERSION_1_1:
break;
default:
phpCAS::error('this version of CAS (`'
.$server_version
.'\') is not supported by phpCAS '
.phpCAS::getVersion());
}
$this->_server['version'] = $server_version;
// check hostname
if ( empty($server_hostname)
|| !preg_match('/[\.\d\-abcdefghijklmnopqrstuvwxyz]*/',$server_hostname) ) {
phpCAS::error('bad CAS server hostname (`'.$server_hostname.'\')');
}
$this->_server['hostname'] = $server_hostname;
// check port
if ( $server_port == 0
|| !is_int($server_port) ) {
phpCAS::error('bad CAS server port (`'.$server_hostname.'\')');
}
$this->_server['port'] = $server_port;
// check URI
if ( !preg_match('/[\.\d\-_abcdefghijklmnopqrstuvwxyz\/]*/',$server_uri) ) {
phpCAS::error('bad CAS server URI (`'.$server_uri.'\')');
}
// add leading and trailing `/' and remove doubles
$server_uri = preg_replace('/\/\//','/','/'.$server_uri.'/');
$this->_server['uri'] = $server_uri;
// set to callback mode if PgtIou and PgtId CGI GET parameters are provided
if ( $this->isProxy() ) {
$this->setCallbackMode(!empty($_GET['pgtIou'])&&!empty($_GET['pgtId']));
}
if ( $this->isCallbackMode() ) {
//callback mode: check that phpCAS is secured
if ( !$this->isHttps() ) {
phpCAS::error('CAS proxies must be secured to use phpCAS; PGT\'s will not be received from the CAS server');
}
} else {
//normal mode: get ticket and remove it from CGI parameters for developpers
$ticket = (isset($_GET['ticket']) ? $_GET['ticket'] : null);
switch ($this->getServerVersion()) {
case CAS_VERSION_1_0: // check for a Service Ticket
if( preg_match('/^ST-/',$ticket) ) {
phpCAS::trace('ST \''.$ticket.'\' found');
//ST present
$this->setST($ticket);
//ticket has been taken into account, unset it to hide it to applications
unset($_GET['ticket']);
} else if ( !empty($ticket) ) {
//ill-formed ticket, halt
phpCAS::error('ill-formed ticket found in the URL (ticket=`'.htmlentities($ticket).'\')');
}
break;
case CAS_VERSION_2_0: // check for a Service or Proxy Ticket
if (preg_match('/^ST-/', $ticket)) {
phpCAS::trace('ST \'' . $ticket . '\' found');
$this->setST($ticket);
unset ($_GET['ticket']);
} else if (preg_match('/^PT-/', $ticket)) {
phpCAS::trace('PT \'' . $ticket . '\' found');
$this->setPT($ticket);
unset($_GET['ticket']);
} else if ( !empty($ticket) ) {
//ill-formed ticket, halt
phpCAS::error('ill-formed ticket found in the URL (ticket=`'.htmlentities($ticket).'\')');
}
break;
case SAML_VERSION_1_1: // SAML just does Service Tickets
if( preg_match('/^[SP]T-/',$ticket) ) {
phpCAS::trace('SA \''.$ticket.'\' found');
$this->setSA($ticket);
unset($_GET['ticket']);
} else if ( !empty($ticket) ) {
//ill-formed ticket, halt
phpCAS::error('ill-formed ticket found in the URL (ticket=`'.htmlentities($ticket).'\')');
}
break;
}
}
phpCAS::traceEnd();
}
/** @} */
// XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
// XX XX
// XX AUTHENTICATION XX
// XX XX
// XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
/**
* @addtogroup internalAuthentication
* @{
*/
/**
* The Authenticated user. Written by CASClient::setUser(), read by CASClient::getUser().
* @attention client applications should use phpCAS::getUser().
*
* @hideinitializer
* @private
*/
var $_user = '';
/**
* This method sets the CAS user's login name.
*
* @param $user the login name of the authenticated user.
*
* @private
*/
function setUser($user)
{
$this->_user = $user;
}
/**
* This method returns the CAS user's login name.
* @warning should be called only after CASClient::forceAuthentication() or
* CASClient::isAuthenticated(), otherwise halt with an error.
*
* @return the login name of the authenticated user
*/
function getUser()
{
if ( empty($this->_user) ) {
phpCAS::error('this method should be used only after '.__CLASS__.'::forceAuthentication() or '.__CLASS__.'::isAuthenticated()');
}
return $this->_user;
}
/***********************************************************************************************************************
* Atrributes section
*
* @author Matthias Crauwels <matthias.crauwels@ugent.be>, Ghent University, Belgium
*
***********************************************************************************************************************/
/**
* The Authenticated users attributes. Written by CASClient::setAttributes(), read by CASClient::getAttributes().
* @attention client applications should use phpCAS::getAttributes().
*
* @hideinitializer
* @private
*/
var $_attributes = array();
function setAttributes($attributes)
{ $this->_attributes = $attributes; }
function getAttributes() {
if ( empty($this->_user) ) { // if no user is set, there shouldn't be any attributes also...
phpCAS::error('this method should be used only after '.__CLASS__.'::forceAuthentication() or '.__CLASS__.'::isAuthenticated()');
}
return $this->_attributes;
}
function hasAttributes()
{ return !empty($this->_attributes); }
function hasAttribute($key)
{ return (is_array($this->_attributes) && array_key_exists($key, $this->_attributes)); }
function getAttribute($key) {
if($this->hasAttribute($key)) {
return $this->_attributes[$key];
}
}
/**
* This method is called to renew the authentication of the user
* If the user is authenticated, renew the connection
* If not, redirect to CAS
* @public
*/
function renewAuthentication(){
phpCAS::traceBegin();
// Either way, the user is authenticated by CAS
if( isset( $_SESSION['phpCAS']['auth_checked'] ) )
unset($_SESSION['phpCAS']['auth_checked']);
if ( $this->isAuthenticated() ) {
phpCAS::trace('user already authenticated; renew');
$this->redirectToCas(false,true);
} else {
$this->redirectToCas();
}
phpCAS::traceEnd();
}
/**
* This method is called to be sure that the user is authenticated. When not
* authenticated, halt by redirecting to the CAS server; otherwise return TRUE.
* @return TRUE when the user is authenticated; otherwise halt.
* @public
*/
function forceAuthentication()
{
phpCAS::traceBegin();
if ( $this->isAuthenticated() ) {
// the user is authenticated, nothing to be done.
phpCAS::trace('no need to authenticate');
$res = TRUE;
} else {
// the user is not authenticated, redirect to the CAS server
if (isset($_SESSION['phpCAS']['auth_checked'])) {
unset($_SESSION['phpCAS']['auth_checked']);
}
$this->redirectToCas(FALSE/* no gateway */);
// never reached
$res = FALSE;
}
phpCAS::traceEnd($res);
return $res;
}
/**
* An integer that gives the number of times authentication will be cached before rechecked.
*
* @hideinitializer
* @private
*/
var $_cache_times_for_auth_recheck = 0;
/**
* Set the number of times authentication will be cached before rechecked.
*
* @param $n an integer.
*
* @public
*/
function setCacheTimesForAuthRecheck($n)
{
$this->_cache_times_for_auth_recheck = $n;
}
/**
* This method is called to check whether the user is authenticated or not.
* @return TRUE when the user is authenticated, FALSE otherwise.
* @public
*/
function checkAuthentication()
{
phpCAS::traceBegin();
if ( $this->isAuthenticated() ) {
phpCAS::trace('user is authenticated');
$res = TRUE;
} else if (isset($_SESSION['phpCAS']['auth_checked'])) {
// the previous request has redirected the client to the CAS server with gateway=true
unset($_SESSION['phpCAS']['auth_checked']);
$res = FALSE;
} else {
// $_SESSION['phpCAS']['auth_checked'] = true;
// $this->redirectToCas(TRUE/* gateway */);
// // never reached
// $res = FALSE;
// avoid a check against CAS on every request
if (! isset($_SESSION['phpCAS']['unauth_count']) )
$_SESSION['phpCAS']['unauth_count'] = -2; // uninitialized
if (($_SESSION['phpCAS']['unauth_count'] != -2 && $this->_cache_times_for_auth_recheck == -1)
|| ($_SESSION['phpCAS']['unauth_count'] >= 0 && $_SESSION['phpCAS']['unauth_count'] < $this->_cache_times_for_auth_recheck))
{
$res = FALSE;
if ($this->_cache_times_for_auth_recheck != -1)
{
$_SESSION['phpCAS']['unauth_count']++;
phpCAS::trace('user is not authenticated (cached for '.$_SESSION['phpCAS']['unauth_count'].' times of '.$this->_cache_times_for_auth_recheck.')');
}
else
{
phpCAS::trace('user is not authenticated (cached for until login pressed)');
}
}
else
{
$_SESSION['phpCAS']['unauth_count'] = 0;
$_SESSION['phpCAS']['auth_checked'] = true;
phpCAS::trace('user is not authenticated (cache reset)');
$this->redirectToCas(TRUE/* gateway */);
// never reached
$res = FALSE;
}
}
phpCAS::traceEnd($res);
return $res;
}
/**
* This method is called to check if the user is authenticated (previously or by
* tickets given in the URL).
*
* @return TRUE when the user is authenticated. Also may redirect to the same URL without the ticket.
*
* @public
*/
function isAuthenticated()
{
phpCAS::traceBegin();
$res = FALSE;
$validate_url = '';
if ( $this->wasPreviouslyAuthenticated() ) {
// the user has already (previously during the session) been
// authenticated, nothing to be done.
phpCAS::trace('user was already authenticated, no need to look for tickets');
$res = TRUE;
}
else {
if ( $this->hasST() ) {
// if a Service Ticket was given, validate it
phpCAS::trace('ST `'.$this->getST().'\' is present');
$this->validateST($validate_url,$text_response,$tree_response); // if it fails, it halts
phpCAS::trace('ST `'.$this->getST().'\' was validated');
if ( $this->isProxy() ) {
$this->validatePGT($validate_url,$text_response,$tree_response); // idem
phpCAS::trace('PGT `'.$this->getPGT().'\' was validated');
$_SESSION['phpCAS']['pgt'] = $this->getPGT();
}
$_SESSION['phpCAS']['user'] = $this->getUser();
$res = TRUE;
}
elseif ( $this->hasPT() ) {
// if a Proxy Ticket was given, validate it
phpCAS::trace('PT `'.$this->getPT().'\' is present');
$this->validatePT($validate_url,$text_response,$tree_response); // note: if it fails, it halts
phpCAS::trace('PT `'.$this->getPT().'\' was validated');
if ( $this->isProxy() ) {
$this->validatePGT($validate_url,$text_response,$tree_response); // idem
phpCAS::trace('PGT `'.$this->getPGT().'\' was validated');
$_SESSION['phpCAS']['pgt'] = $this->getPGT();
}
$_SESSION['phpCAS']['user'] = $this->getUser();
$res = TRUE;
}
elseif ( $this->hasSA() ) {
// if we have a SAML ticket, validate it.
phpCAS::trace('SA `'.$this->getSA().'\' is present');
$this->validateSA($validate_url,$text_response,$tree_response); // if it fails, it halts
phpCAS::trace('SA `'.$this->getSA().'\' was validated');
$_SESSION['phpCAS']['user'] = $this->getUser();
$_SESSION['phpCAS']['attributes'] = $this->getAttributes();
$res = TRUE;
}
else {
// no ticket given, not authenticated
phpCAS::trace('no ticket found');
}
if ($res) {
// if called with a ticket parameter, we need to redirect to the app without the ticket so that CAS-ification is transparent to the browser (for later POSTS)
// most of the checks and errors should have been made now, so we're safe for redirect without masking error messages.
header('Location: '.$this->getURL());
phpCAS::log( "Prepare redirect to : ".$this->getURL() );
}
}
phpCAS::traceEnd($res);
return $res;
}
/**
* This method tells if the current session is authenticated.
* @return true if authenticated based soley on $_SESSION variable
* @since 0.4.22 by Brendan Arnold
*/
function isSessionAuthenticated ()
{
return !empty($_SESSION['phpCAS']['user']);
}
/**
* This method tells if the user has already been (previously) authenticated
* by looking into the session variables.
*
* @note This function switches to callback mode when needed.
*
* @return TRUE when the user has already been authenticated; FALSE otherwise.
*
* @private
*/
function wasPreviouslyAuthenticated()
{
phpCAS::traceBegin();
if ( $this->isCallbackMode() ) {
$this->callback();
}
$auth = FALSE;
if ( $this->isProxy() ) {
// CAS proxy: username and PGT must be present
if ( $this->isSessionAuthenticated() && !empty($_SESSION['phpCAS']['pgt']) ) {
// authentication already done
$this->setUser($_SESSION['phpCAS']['user']);
$this->setPGT($_SESSION['phpCAS']['pgt']);
phpCAS::trace('user = `'.$_SESSION['phpCAS']['user'].'\', PGT = `'.$_SESSION['phpCAS']['pgt'].'\'');
$auth = TRUE;
} elseif ( $this->isSessionAuthenticated() && empty($_SESSION['phpCAS']['pgt']) ) {
// these two variables should be empty or not empty at the same time
phpCAS::trace('username found (`'.$_SESSION['phpCAS']['user'].'\') but PGT is empty');
// unset all tickets to enforce authentication
unset($_SESSION['phpCAS']);
$this->setST('');
$this->setPT('');
} elseif ( !$this->isSessionAuthenticated() && !empty($_SESSION['phpCAS']['pgt']) ) {
// these two variables should be empty or not empty at the same time
phpCAS::trace('PGT found (`'.$_SESSION['phpCAS']['pgt'].'\') but username is empty');
// unset all tickets to enforce authentication
unset($_SESSION['phpCAS']);
$this->setST('');
$this->setPT('');
} else {
phpCAS::trace('neither user not PGT found');
}
} else {
// `simple' CAS client (not a proxy): username must be present
if ( $this->isSessionAuthenticated() ) {
// authentication already done
$this->setUser($_SESSION['phpCAS']['user']);
if(isset($_SESSION['phpCAS']['attributes'])){
$this->setAttributes($_SESSION['phpCAS']['attributes']);
}
phpCAS::trace('user = `'.$_SESSION['phpCAS']['user'].'\'');
$auth = TRUE;
} else {
phpCAS::trace('no user found');
}
}
phpCAS::traceEnd($auth);
return $auth;
}
/**
* This method is used to redirect the client to the CAS server.
* It is used by CASClient::forceAuthentication() and CASClient::checkAuthentication().
* @param $gateway true to check authentication, false to force it
* @param $renew true to force the authentication with the CAS server
* @public
*/
function redirectToCas($gateway=false,$renew=false){
phpCAS::traceBegin();
$cas_url = $this->getServerLoginURL($gateway,$renew);
header('Location: '.$cas_url);
phpCAS::log( "Redirect to : ".$cas_url );
$this->printHTMLHeader($this->getString(CAS_STR_AUTHENTICATION_WANTED));
printf('<p>'.$this->getString(CAS_STR_SHOULD_HAVE_BEEN_REDIRECTED).'</p>',$cas_url);
$this->printHTMLFooter();
phpCAS::traceExit();
exit();
}
// /**
// * This method is used to logout from CAS.
// * @param $url a URL that will be transmitted to the CAS server (to come back to when logged out)
// * @public
// */
// function logout($url = "") {
// phpCAS::traceBegin();
// $cas_url = $this->getServerLogoutURL();
// // v0.4.14 sebastien.gougeon at univ-rennes1.fr
// // header('Location: '.$cas_url);
// if ( $url != "" ) {
// // Adam Moore 1.0.0RC2
// $url = '?service=' . $url . '&url=' . $url;
// }
// header('Location: '.$cas_url . $url);
// session_unset();
// session_destroy();
// $this->printHTMLHeader($this->getString(CAS_STR_LOGOUT));
// printf('<p>'.$this->getString(CAS_STR_SHOULD_HAVE_BEEN_REDIRECTED).'</p>',$cas_url);
// $this->printHTMLFooter();
// phpCAS::traceExit();
// exit();
// }
/**
* This method is used to logout from CAS.
* @params $params an array that contains the optional url and service parameters that will be passed to the CAS server
* @public
*/
function logout($params) {
phpCAS::traceBegin();
$cas_url = $this->getServerLogoutURL();
$paramSeparator = '?';
if (isset($params['url'])) {
$cas_url = $cas_url . $paramSeparator . "url=" . urlencode($params['url']);
$paramSeparator = '&';
}
if (isset($params['service'])) {
$cas_url = $cas_url . $paramSeparator . "service=" . urlencode($params['service']);
}
header('Location: '.$cas_url);
phpCAS::log( "Prepare redirect to : ".$cas_url );
session_unset();
session_destroy();
$this->printHTMLHeader($this->getString(CAS_STR_LOGOUT));
printf('<p>'.$this->getString(CAS_STR_SHOULD_HAVE_BEEN_REDIRECTED).'</p>',$cas_url);
$this->printHTMLFooter();
phpCAS::traceExit();
exit();
}
/**
* @return true if the current request is a logout request.
* @private
*/
function isLogoutRequest() {
return !empty($_POST['logoutRequest']);
}
/**
* @return true if a logout request is allowed.
* @private
*/
function isLogoutRequestAllowed() {
}
/**
* This method handles logout requests.
* @param $check_client true to check the client bofore handling the request,
* false not to perform any access control. True by default.
* @param $allowed_clients an array of host names allowed to send logout requests.
* By default, only the CAs server (declared in the constructor) will be allowed.
* @public
*/
function handleLogoutRequests($check_client=true, $allowed_clients=false) {
phpCAS::traceBegin();
if (!$this->isLogoutRequest()) {
phpCAS::log("Not a logout request");
phpCAS::traceEnd();
return;
}
phpCAS::log("Logout requested");
phpCAS::log("SAML REQUEST: ".$_POST['logoutRequest']);
if ($check_client) {
if (!$allowed_clients) {
$allowed_clients = array( $this->getServerHostname() );
}
$client_ip = $_SERVER['REMOTE_ADDR'];
$client = gethostbyaddr($client_ip);
phpCAS::log("Client: ".$client."/".$client_ip);
$allowed = false;
foreach ($allowed_clients as $allowed_client) {
if (($client == $allowed_client) or ($client_ip == $allowed_client)) {
phpCAS::log("Allowed client '".$allowed_client."' matches, logout request is allowed");
$allowed = true;
break;
} else {
phpCAS::log("Allowed client '".$allowed_client."' does not match");
}
}
if (!$allowed) {
phpCAS::error("Unauthorized logout request from client '".$client."'");
printf("Unauthorized!");
phpCAS::traceExit();
exit();
}
} else {
phpCAS::log("No access control set");
}
// Extract the ticket from the SAML Request
preg_match("|<samlp:SessionIndex>(.*)</samlp:SessionIndex>|", $_POST['logoutRequest'], $tick, PREG_OFFSET_CAPTURE, 3);
$wrappedSamlSessionIndex = preg_replace('|<samlp:SessionIndex>|','',$tick[0][0]);
$ticket2logout = preg_replace('|</samlp:SessionIndex>|','',$wrappedSamlSessionIndex);
phpCAS::log("Ticket to logout: ".$ticket2logout);
$session_id = preg_replace('/[^\w]/','',$ticket2logout);
phpCAS::log("Session id: ".$session_id);
// fix New session ID
session_id($session_id);
$_COOKIE[session_name()]=$session_id;
$_GET[session_name()]=$session_id;
// Overwrite session
session_start();
session_unset();
session_destroy();
printf("Disconnected!");
phpCAS::traceExit();
exit();
}
/** @} */
// XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
// XX XX
// XX BASIC CLIENT FEATURES (CAS 1.0) XX
// XX XX
// XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
// ########################################################################
// ST
// ########################################################################
/**
* @addtogroup internalBasic
* @{
*/
/**
* the Service Ticket provided in the URL of the request if present
* (empty otherwise). Written by CASClient::CASClient(), read by
* CASClient::getST() and CASClient::hasPGT().
*
* @hideinitializer
* @private
*/
var $_st = '';
/**
* This method returns the Service Ticket provided in the URL of the request.
* @return The service ticket.
* @private
*/
function getST()
{ return $this->_st; }
/**
* This method stores the Service Ticket.
* @param $st The Service Ticket.
* @private
*/
function setST($st)
{ $this->_st = $st; }
/**
* This method tells if a Service Ticket was stored.
* @return TRUE if a Service Ticket has been stored.
* @private
*/
function hasST()
{ return !empty($this->_st); }
/** @} */
// ########################################################################
// ST VALIDATION
// ########################################################################
/**
* @addtogroup internalBasic
* @{
*/
/**
* the certificate of the CAS server.
*
* @hideinitializer
* @private
*/
var $_cas_server_cert = '';
/**
* the certificate of the CAS server CA.
*
* @hideinitializer
* @private
*/
var $_cas_server_ca_cert = '';
/**
* Set to true not to validate the CAS server.
*
* @hideinitializer
* @private
*/
var $_no_cas_server_validation = false;
/**
* Set the certificate of the CAS server.
*
* @param $cert the PEM certificate
*/
function setCasServerCert($cert)
{
$this->_cas_server_cert = $cert;
}
/**
* Set the CA certificate of the CAS server.
*
* @param $cert the PEM certificate of the CA that emited the cert of the server
*/
function setCasServerCACert($cert)
{
$this->_cas_server_ca_cert = $cert;
}
/**
* Set no SSL validation for the CAS server.
*/
function setNoCasServerValidation()
{
$this->_no_cas_server_validation = true;
}
/**
* This method is used to validate a ST; halt on failure, and sets $validate_url,
* $text_reponse and $tree_response on success. These parameters are used later
* by CASClient::validatePGT() for CAS proxies.
*
* @param $validate_url the URL of the request to the CAS server.
* @param $text_response the response of the CAS server, as is (XML text).
* @param $tree_response the response of the CAS server, as a DOM XML tree.
*
* @return bool TRUE when successfull, halt otherwise by calling CASClient::authError().
*
* @private
*/
function validateST($validate_url,&$text_response,&$tree_response)
{
phpCAS::traceBegin();
// build the URL to validate the ticket
$validate_url = $this->getServerServiceValidateURL().'&ticket='.$this->getST();
if ( $this->isProxy() ) {
// pass the callback url for CAS proxies
$validate_url .= '&pgtUrl='.$this->getCallbackURL();
}
// open and read the URL
if ( !$this->readURL($validate_url,''/*cookies*/,$headers,$text_response,$err_msg) ) {
phpCAS::trace('could not open URL \''.$validate_url.'\' to validate ('.$err_msg.')');
$this->authError('ST not validated',
$validate_url,
TRUE/*$no_response*/);
}
// analyze the result depending on the version
switch ($this->getServerVersion()) {
case CAS_VERSION_1_0:
if (preg_match('/^no\n/',$text_response)) {
phpCAS::trace('ST has not been validated');
$this->authError('ST not validated',
$validate_url,
FALSE/*$no_response*/,
FALSE/*$bad_response*/,
$text_response);
}
if (!preg_match('/^yes\n/',$text_response)) {
phpCAS::trace('ill-formed response');
$this->authError('ST not validated',
$validate_url,
FALSE/*$no_response*/,
TRUE/*$bad_response*/,
$text_response);
}
// ST has been validated, extract the user name
$arr = preg_split('/\n/',$text_response);
$this->setUser(trim($arr[1]));
break;
case CAS_VERSION_2_0:
// read the response of the CAS server into a DOM object
if ( !($dom = domxml_open_mem($text_response))) {
phpCAS::trace('domxml_open_mem() failed');
$this->authError('ST not validated',
$validate_url,
FALSE/*$no_response*/,
TRUE/*$bad_response*/,
$text_response);
}
// read the root node of the XML tree
if ( !($tree_response = $dom->document_element()) ) {
phpCAS::trace('document_element() failed');
$this->authError('ST not validated',
$validate_url,
FALSE/*$no_response*/,
TRUE/*$bad_response*/,
$text_response);
}
// insure that tag name is 'serviceResponse'
if ( $tree_response->node_name() != 'serviceResponse' ) {
phpCAS::trace('bad XML root node (should be `serviceResponse\' instead of `'.$tree_response->node_name().'\'');
$this->authError('ST not validated',
$validate_url,
FALSE/*$no_response*/,
TRUE/*$bad_response*/,
$text_response);
}
if ( sizeof($success_elements = $tree_response->get_elements_by_tagname("authenticationSuccess")) != 0) {
// authentication succeded, extract the user name
if ( sizeof($user_elements = $success_elements[0]->get_elements_by_tagname("user")) == 0) {
phpCAS::trace('<authenticationSuccess> found, but no <user>');
$this->authError('ST not validated',
$validate_url,
FALSE/*$no_response*/,
TRUE/*$bad_response*/,
$text_response);
}
$user = trim($user_elements[0]->get_content());
phpCAS::trace('user = `'.$user);
$this->setUser($user);
} else if ( sizeof($failure_elements = $tree_response->get_elements_by_tagname("authenticationFailure")) != 0) {
phpCAS::trace('<authenticationFailure> found');
// authentication failed, extract the error code and message
$this->authError('ST not validated',
$validate_url,
FALSE/*$no_response*/,
FALSE/*$bad_response*/,
$text_response,
$failure_elements[0]->get_attribute('code')/*$err_code*/,
trim($failure_elements[0]->get_content())/*$err_msg*/);
} else {
phpCAS::trace('neither <authenticationSuccess> nor <authenticationFailure> found');
$this->authError('ST not validated',
$validate_url,
FALSE/*$no_response*/,
TRUE/*$bad_response*/,
$text_response);
}
break;
}
// at this step, ST has been validated and $this->_user has been set,
phpCAS::traceEnd(TRUE);
return TRUE;
}
// ########################################################################
// SAML VALIDATION
// ########################################################################
/**
* @addtogroup internalBasic
* @{
*/
/**
* This method is used to validate a SAML TICKET; halt on failure, and sets $validate_url,
* $text_reponse and $tree_response on success. These parameters are used later
* by CASClient::validatePGT() for CAS proxies.
*
* @param $validate_url the URL of the request to the CAS server.
* @param $text_response the response of the CAS server, as is (XML text).
* @param $tree_response the response of the CAS server, as a DOM XML tree.
*
* @return bool TRUE when successfull, halt otherwise by calling CASClient::authError().
*
* @private
*/
function validateSA($validate_url,&$text_response,&$tree_response)
{
phpCAS::traceBegin();
// build the URL to validate the ticket
$validate_url = $this->getServerSamlValidateURL();
// open and read the URL
if ( !$this->readURL($validate_url,''/*cookies*/,$headers,$text_response,$err_msg) ) {
phpCAS::trace('could not open URL \''.$validate_url.'\' to validate ('.$err_msg.')');
$this->authError('SA not validated', $validate_url, TRUE/*$no_response*/);
}
phpCAS::trace('server version: '.$this->getServerVersion());
// analyze the result depending on the version
switch ($this->getServerVersion()) {
case SAML_VERSION_1_1:
// read the response of the CAS server into a DOM object
if ( !($dom = domxml_open_mem($text_response))) {
phpCAS::trace('domxml_open_mem() failed');
$this->authError('SA not validated',
$validate_url,
FALSE/*$no_response*/,
TRUE/*$bad_response*/,
$text_response);
}
// read the root node of the XML tree
if ( !($tree_response = $dom->document_element()) ) {
phpCAS::trace('document_element() failed');
$this->authError('SA not validated',
$validate_url,
FALSE/*$no_response*/,
TRUE/*$bad_response*/,
$text_response);
}
// insure that tag name is 'Envelope'
if ( $tree_response->node_name() != 'Envelope' ) {
phpCAS::trace('bad XML root node (should be `Envelope\' instead of `'.$tree_response->node_name().'\'');
$this->authError('SA not validated',
$validate_url,
FALSE/*$no_response*/,
TRUE/*$bad_response*/,
$text_response);
}
// check for the NameIdentifier tag in the SAML response
if ( sizeof($success_elements = $tree_response->get_elements_by_tagname("NameIdentifier")) != 0) {
phpCAS::trace('NameIdentifier found');
$user = trim($success_elements[0]->get_content());
phpCAS::trace('user = `'.$user.'`');
$this->setUser($user);
$this->setSessionAttributes($text_response);
} else {
phpCAS::trace('no <NameIdentifier> tag found in SAML payload');
$this->authError('SA not validated',
$validate_url,
FALSE/*$no_response*/,
TRUE/*$bad_response*/,
$text_response);
}
break;
}
// at this step, ST has been validated and $this->_user has been set,
phpCAS::traceEnd(TRUE);
return TRUE;
}
/**
* This method will parse the DOM and pull out the attributes from the SAML
* payload and put them into an array, then put the array into the session.
*
* @param $text_response the SAML payload.
* @return bool TRUE when successfull, halt otherwise by calling CASClient::authError().
*
* @private
*/
function setSessionAttributes($text_response)
{
phpCAS::traceBegin();
$result = FALSE;
if (isset($_SESSION[SAML_ATTRIBUTES])) {
phpCAS::trace("session attrs already set."); //testbml - do we care?
}
$attr_array = array();
if (($dom = domxml_open_mem($text_response))) {
$xPath = $dom->xpath_new_context();
$xPath->xpath_register_ns('samlp', 'urn:oasis:names:tc:SAML:1.0:protocol');
$xPath->xpath_register_ns('saml', 'urn:oasis:names:tc:SAML:1.0:assertion');
$nodelist = $xPath->xpath_eval("//saml:Attribute");
$attrs = $nodelist->nodeset;
phpCAS::trace($text_response);
foreach($attrs as $attr){
$xres = $xPath->xpath_eval("saml:AttributeValue", $attr);
$name = $attr->get_attribute("AttributeName");
$value_array = array();
foreach($xres->nodeset as $node){
$value_array[] = $node->get_content();
}
phpCAS::trace("* " . $name . "=" . $value_array);
$attr_array[$name] = $value_array;
}
$_SESSION[SAML_ATTRIBUTES] = $attr_array;
// UGent addition...
foreach($attr_array as $attr_key => $attr_value) {
if(count($attr_value) > 1) {
$this->_attributes[$attr_key] = $attr_value;
}
else {
$this->_attributes[$attr_key] = $attr_value[0];
}
}
$result = TRUE;
}
phpCAS::traceEnd($result);
return $result;
}
/** @} */
// XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
// XX XX
// XX PROXY FEATURES (CAS 2.0) XX
// XX XX
// XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
// ########################################################################
// PROXYING
// ########################################################################
/**
* @addtogroup internalProxy
* @{
*/
/**
* A boolean telling if the client is a CAS proxy or not. Written by CASClient::CASClient(),
* read by CASClient::isProxy().
*
* @private
*/
var $_proxy;
/**
* Tells if a CAS client is a CAS proxy or not
*
* @return TRUE when the CAS client is a CAs proxy, FALSE otherwise
*
* @private
*/
function isProxy()
{
return $this->_proxy;
}
/** @} */
// ########################################################################
// PGT
// ########################################################################
/**
* @addtogroup internalProxy
* @{
*/
/**
* the Proxy Grnting Ticket given by the CAS server (empty otherwise).
* Written by CASClient::setPGT(), read by CASClient::getPGT() and CASClient::hasPGT().
*
* @hideinitializer
* @private
*/
var $_pgt = '';
/**
* This method returns the Proxy Granting Ticket given by the CAS server.
* @return The Proxy Granting Ticket.
* @private
*/
function getPGT()
{ return $this->_pgt; }
/**
* This method stores the Proxy Granting Ticket.
* @param $pgt The Proxy Granting Ticket.
* @private
*/
function setPGT($pgt)
{ $this->_pgt = $pgt; }
/**
* This method tells if a Proxy Granting Ticket was stored.
* @return TRUE if a Proxy Granting Ticket has been stored.
* @private
*/
function hasPGT()
{ return !empty($this->_pgt); }
/** @} */
// ########################################################################
// CALLBACK MODE
// ########################################################################
/**
* @addtogroup internalCallback
* @{
*/
/**
* each PHP script using phpCAS in proxy mode is its own callback to get the
* PGT back from the CAS server. callback_mode is detected by the constructor
* thanks to the GET parameters.
*/
/**
* a boolean to know if the CAS client is running in callback mode. Written by
* CASClient::setCallBackMode(), read by CASClient::isCallbackMode().
*
* @hideinitializer
* @private
*/
var $_callback_mode = FALSE;
/**
* This method sets/unsets callback mode.
*
* @param $callback_mode TRUE to set callback mode, FALSE otherwise.
*
* @private
*/
function setCallbackMode($callback_mode)
{
$this->_callback_mode = $callback_mode;
}
/**
* This method returns TRUE when the CAs client is running i callback mode,
* FALSE otherwise.
*
* @return A boolean.
*
* @private
*/
function isCallbackMode()
{
return $this->_callback_mode;
}
/**
* the URL that should be used for the PGT callback (in fact the URL of the
* current request without any CGI parameter). Written and read by
* CASClient::getCallbackURL().
*
* @hideinitializer
* @private
*/
var $_callback_url = '';
/**
* This method returns the URL that should be used for the PGT callback (in
* fact the URL of the current request without any CGI parameter, except if
* phpCAS::setFixedCallbackURL() was used).
*
* @return The callback URL
*
* @private
*/
function getCallbackURL()
{
// the URL is built when needed only
if ( empty($this->_callback_url) ) {
$final_uri = '';
// remove the ticket if present in the URL
$final_uri = 'https://';
/* replaced by Julien Marchal - v0.4.6
* $this->uri .= $_SERVER['SERVER_NAME'];
*/
if(empty($_SERVER['HTTP_X_FORWARDED_SERVER'])){
/* replaced by teedog - v0.4.12
* $final_uri .= $_SERVER['SERVER_NAME'];
*/
if (empty($_SERVER['SERVER_NAME'])) {
$final_uri .= $_SERVER['HTTP_HOST'];
} else {
$final_uri .= $_SERVER['SERVER_NAME'];
}
} else {
$final_uri .= $_SERVER['HTTP_X_FORWARDED_SERVER'];
}
if ( ($this->isHttps() && $_SERVER['SERVER_PORT']!=443)
|| (!$this->isHttps() && $_SERVER['SERVER_PORT']!=80) ) {
$final_uri .= ':';
$final_uri .= $_SERVER['SERVER_PORT'];
}
$request_uri = $_SERVER['REQUEST_URI'];
$request_uri = preg_replace('/\?.*$/','',$request_uri);
$final_uri .= $request_uri;
$this->setCallbackURL($final_uri);
}
return $this->_callback_url;
}
/**
* This method sets the callback url.
*
* @param $callback_url url to set callback
*
* @private
*/
function setCallbackURL($url)
{
return $this->_callback_url = $url;
}
/**
* This method is called by CASClient::CASClient() when running in callback
* mode. It stores the PGT and its PGT Iou, prints its output and halts.
*
* @private
*/
function callback()
{
phpCAS::traceBegin();
$this->printHTMLHeader('phpCAS callback');
$pgt_iou = $_GET['pgtIou'];
$pgt = $_GET['pgtId'];
phpCAS::trace('Storing PGT `'.$pgt.'\' (id=`'.$pgt_iou.'\')');
echo '<p>Storing PGT `'.$pgt.'\' (id=`'.$pgt_iou.'\').</p>';
$this->storePGT($pgt,$pgt_iou);
$this->printHTMLFooter();
phpCAS::traceExit();
exit();
}
/** @} */
// ########################################################################
// PGT STORAGE
// ########################################################################
/**
* @addtogroup internalPGTStorage
* @{
*/
/**
* an instance of a class inheriting of PGTStorage, used to deal with PGT
* storage. Created by CASClient::setPGTStorageFile() or CASClient::setPGTStorageDB(), used
* by CASClient::setPGTStorageFile(), CASClient::setPGTStorageDB() and CASClient::initPGTStorage().
*
* @hideinitializer
* @private
*/
var $_pgt_storage = null;
/**
* This method is used to initialize the storage of PGT's.
* Halts on error.
*
* @private
*/
function initPGTStorage()
{
// if no SetPGTStorageXxx() has been used, default to file
if ( !is_object($this->_pgt_storage) ) {
$this->setPGTStorageFile();
}
// initializes the storage
$this->_pgt_storage->init();
}
/**
* This method stores a PGT. Halts on error.
*
* @param $pgt the PGT to store
* @param $pgt_iou its corresponding Iou
*
* @private
*/
function storePGT($pgt,$pgt_iou)
{
// ensure that storage is initialized
$this->initPGTStorage();
// writes the PGT
$this->_pgt_storage->write($pgt,$pgt_iou);
}
/**
* This method reads a PGT from its Iou and deletes the corresponding storage entry.
*
* @param $pgt_iou the PGT Iou
*
* @return The PGT corresponding to the Iou, FALSE when not found.
*
* @private
*/
function loadPGT($pgt_iou)
{
// ensure that storage is initialized
$this->initPGTStorage();
// read the PGT
return $this->_pgt_storage->read($pgt_iou);
}
/**
* This method is used to tell phpCAS to store the response of the
* CAS server to PGT requests onto the filesystem.
*
* @param $format the format used to store the PGT's (`plain' and `xml' allowed)
* @param $path the path where the PGT's should be stored
*
* @public
*/
function setPGTStorageFile($format='',
$path='')
{
// check that the storage has not already been set
if ( is_object($this->_pgt_storage) ) {
phpCAS::error('PGT storage already defined');
}
// create the storage object
$this->_pgt_storage = new PGTStorageFile($this,$format,$path);
}
/**
* This method is used to tell phpCAS to store the response of the
* CAS server to PGT requests into a database.
* @note The connection to the database is done only when needed.
* As a consequence, bad parameters are detected only when
* initializing PGT storage.
*
* @param $user the user to access the data with
* @param $password the user's password
* @param $database_type the type of the database hosting the data
* @param $hostname the server hosting the database
* @param $port the port the server is listening on
* @param $database the name of the database
* @param $table the name of the table storing the data
*
* @public
*/
function setPGTStorageDB($user,
$password,
$database_type,
$hostname,
$port,
$database,
$table)
{
// check that the storage has not already been set
if ( is_object($this->_pgt_storage) ) {
phpCAS::error('PGT storage already defined');
}
// warn the user that he should use file storage...
trigger_error('PGT storage into database is an experimental feature, use at your own risk',E_USER_WARNING);
// create the storage object
$this->_pgt_storage = new PGTStorageDB($this,$user,$password,$database_type,$hostname,$port,$database,$table);
}
// ########################################################################
// PGT VALIDATION
// ########################################################################
/**
* This method is used to validate a PGT; halt on failure.
*
* @param $validate_url the URL of the request to the CAS server.
* @param $text_response the response of the CAS server, as is (XML text); result
* of CASClient::validateST() or CASClient::validatePT().
* @param $tree_response the response of the CAS server, as a DOM XML tree; result
* of CASClient::validateST() or CASClient::validatePT().
*
* @return bool TRUE when successfull, halt otherwise by calling CASClient::authError().
*
* @private
*/
function validatePGT(&$validate_url,$text_response,$tree_response)
{
// here cannot use phpCAS::traceBegin(); alongside domxml-php4-to-php5.php
phpCAS::log('start validatePGT()');
if ( sizeof($arr = $tree_response->get_elements_by_tagname("proxyGrantingTicket")) == 0) {
phpCAS::trace('<proxyGrantingTicket> not found');
// authentication succeded, but no PGT Iou was transmitted
$this->authError('Ticket validated but no PGT Iou transmitted',
$validate_url,
FALSE/*$no_response*/,
FALSE/*$bad_response*/,
$text_response);
} else {
// PGT Iou transmitted, extract it
$pgt_iou = trim($arr[0]->get_content());
$pgt = $this->loadPGT($pgt_iou);
if ( $pgt == FALSE ) {
phpCAS::trace('could not load PGT');
$this->authError('PGT Iou was transmitted but PGT could not be retrieved',
$validate_url,
FALSE/*$no_response*/,
FALSE/*$bad_response*/,
$text_response);
}
$this->setPGT($pgt);
}
// here, cannot use phpCAS::traceEnd(TRUE); alongside domxml-php4-to-php5.php
phpCAS::log('end validatePGT()');
return TRUE;
}
// ########################################################################
// PGT VALIDATION
// ########################################################################
/**
* This method is used to retrieve PT's from the CAS server thanks to a PGT.
*
* @param $target_service the service to ask for with the PT.
* @param $err_code an error code (PHPCAS_SERVICE_OK on success).
* @param $err_msg an error message (empty on success).
*
* @return a Proxy Ticket, or FALSE on error.
*
* @private
*/
function retrievePT($target_service,&$err_code,&$err_msg)
{
phpCAS::traceBegin();
// by default, $err_msg is set empty and $pt to TRUE. On error, $pt is
// set to false and $err_msg to an error message. At the end, if $pt is FALSE
// and $error_msg is still empty, it is set to 'invalid response' (the most
// commonly encountered error).
$err_msg = '';
// build the URL to retrieve the PT
// $cas_url = $this->getServerProxyURL().'?targetService='.preg_replace('/&/','%26',$target_service).'&pgt='.$this->getPGT();
$cas_url = $this->getServerProxyURL().'?targetService='.urlencode($target_service).'&pgt='.$this->getPGT();
// open and read the URL
if ( !$this->readURL($cas_url,''/*cookies*/,$headers,$cas_response,$err_msg) ) {
phpCAS::trace('could not open URL \''.$cas_url.'\' to validate ('.$err_msg.')');
$err_code = PHPCAS_SERVICE_PT_NO_SERVER_RESPONSE;
$err_msg = 'could not retrieve PT (no response from the CAS server)';
phpCAS::traceEnd(FALSE);
return FALSE;
}
$bad_response = FALSE;
if ( !$bad_response ) {
// read the response of the CAS server into a DOM object
if ( !($dom = @domxml_open_mem($cas_response))) {
phpCAS::trace('domxml_open_mem() failed');
// read failed
$bad_response = TRUE;
}
}
if ( !$bad_response ) {
// read the root node of the XML tree
if ( !($root = $dom->document_element()) ) {
phpCAS::trace('document_element() failed');
// read failed
$bad_response = TRUE;
}
}
if ( !$bad_response ) {
// insure that tag name is 'serviceResponse'
if ( $root->node_name() != 'serviceResponse' ) {
phpCAS::trace('node_name() failed');
// bad root node
$bad_response = TRUE;
}
}
if ( !$bad_response ) {
// look for a proxySuccess tag
if ( sizeof($arr = $root->get_elements_by_tagname("proxySuccess")) != 0) {
// authentication succeded, look for a proxyTicket tag
if ( sizeof($arr = $root->get_elements_by_tagname("proxyTicket")) != 0) {
$err_code = PHPCAS_SERVICE_OK;
$err_msg = '';
phpCAS::trace('original PT: '.trim($arr[0]->get_content()));
$pt = trim($arr[0]->get_content());
phpCAS::traceEnd($pt);
return $pt;
} else {
phpCAS::trace('<proxySuccess> was found, but not <proxyTicket>');
}
}
// look for a proxyFailure tag
else if ( sizeof($arr = $root->get_elements_by_tagname("proxyFailure")) != 0) {
// authentication failed, extract the error
$err_code = PHPCAS_SERVICE_PT_FAILURE;
$err_msg = 'PT retrieving failed (code=`'
.$arr[0]->get_attribute('code')
.'\', message=`'
.trim($arr[0]->get_content())
.'\')';
phpCAS::traceEnd(FALSE);
return FALSE;
} else {
phpCAS::trace('neither <proxySuccess> nor <proxyFailure> found');
}
}
// at this step, we are sure that the response of the CAS server was ill-formed
$err_code = PHPCAS_SERVICE_PT_BAD_SERVER_RESPONSE;
$err_msg = 'Invalid response from the CAS server (response=`'.$cas_response.'\')';
phpCAS::traceEnd(FALSE);
return FALSE;
}
// ########################################################################
// ACCESS TO EXTERNAL SERVICES
// ########################################################################
/**
* This method is used to acces a remote URL.
*
* @param $url the URL to access.
* @param $cookies an array containing cookies strings such as 'name=val'
* @param $headers an array containing the HTTP header lines of the response
* (an empty array on failure).
* @param $body the body of the response, as a string (empty on failure).
* @param $err_msg an error message, filled on failure.
*
* @return TRUE on success, FALSE otherwise (in this later case, $err_msg
* contains an error message).
*
* @private
*/
function readURL($url,$cookies,&$headers,&$body,&$err_msg)
{
phpCAS::traceBegin();
$headers = '';
$body = '';
$err_msg = '';
$res = TRUE;
// initialize the CURL session
$ch = curl_init($url);
if (version_compare(PHP_VERSION,'5.1.3','>=')) {
//only avaible in php5
curl_setopt_array($ch, $this->_curl_options);
} else {
foreach ($this->_curl_options as $key => $value) {
curl_setopt($ch, $key, $value);
}
}
if ($this->_cas_server_cert == '' && $this->_cas_server_ca_cert == '' && !$this->_no_cas_server_validation) {
phpCAS::error('one of the methods phpCAS::setCasServerCert(), phpCAS::setCasServerCACert() or phpCAS::setNoCasServerValidation() must be called.');
}
if ($this->_cas_server_cert != '' && $this->_cas_server_ca_cert != '') {
// This branch added by IDMS. Seems phpCAS implementor got a bit confused about the curl options CURLOPT_SSLCERT and CURLOPT_CAINFO
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 1);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 1);
curl_setopt($ch, CURLOPT_SSLCERT, $this->_cas_server_cert);
curl_setopt($ch, CURLOPT_CAINFO, $this->_cas_server_ca_cert);
curl_setopt($ch, CURLOPT_VERBOSE, '1');
phpCAS::trace('CURL: Set all required opts for mutual authentication ------');
} else if ($this->_cas_server_cert != '' ) {
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 1);
curl_setopt($ch, CURLOPT_SSLCERT, $this->_cas_server_cert);
} else if ($this->_cas_server_ca_cert != '') {
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 1);
curl_setopt($ch, CURLOPT_CAINFO, $this->_cas_server_ca_cert);
} else {
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 1);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
}
// return the CURL output into a variable
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
// get the HTTP header with a callback
$this->_curl_headers = array(); // empty the headers array
curl_setopt($ch, CURLOPT_HEADERFUNCTION, array($this, '_curl_read_headers'));
// add cookies headers
if ( is_array($cookies) ) {
curl_setopt($ch,CURLOPT_COOKIE,implode(';',$cookies));
}
// add extra stuff if SAML
if ($this->hasSA()) {
$more_headers = array ("soapaction: http://www.oasis-open.org/committees/security",
"cache-control: no-cache",
"pragma: no-cache",
"accept: text/xml",
"connection: keep-alive",
"content-type: text/xml");
curl_setopt($ch, CURLOPT_HTTPHEADER, $more_headers);
curl_setopt($ch, CURLOPT_POST, 1);
$data = $this->buildSAMLPayload();
//phpCAS::trace('SAML Payload: '.print_r($data, TRUE));
curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
}
// perform the query
$buf = curl_exec ($ch);
//phpCAS::trace('CURL: Call completed. Response body is: \''.$buf.'\'');
if ( $buf === FALSE ) {
phpCAS::trace('curl_exec() failed');
$err_msg = 'CURL error #'.curl_errno($ch).': '.curl_error($ch);
//phpCAS::trace('curl error: '.$err_msg);
// close the CURL session
curl_close ($ch);
$res = FALSE;
} else {
// close the CURL session
curl_close ($ch);
$headers = $this->_curl_headers;
$body = $buf;
}
phpCAS::traceEnd($res);
return $res;
}
/**
* This method is used to build the SAML POST body sent to /samlValidate URL.
*
* @return the SOAP-encased SAMLP artifact (the ticket).
*
* @private
*/
function buildSAMLPayload()
{
phpCAS::traceBegin();
//get the ticket
$sa = $this->getSA();
//phpCAS::trace("SA: ".$sa);
$body=SAML_SOAP_ENV.SAML_SOAP_BODY.SAMLP_REQUEST.SAML_ASSERTION_ARTIFACT.$sa.SAML_ASSERTION_ARTIFACT_CLOSE.SAMLP_REQUEST_CLOSE.SAML_SOAP_BODY_CLOSE.SAML_SOAP_ENV_CLOSE;
phpCAS::traceEnd($body);
return ($body);
}
/**
* This method is the callback used by readURL method to request HTTP headers.
*/
var $_curl_headers = array();
function _curl_read_headers($ch, $header)
{
$this->_curl_headers[] = $header;
return strlen($header);
}
/**
* This method is used to access an HTTP[S] service.
*
* @param $url the service to access.
* @param $err_code an error code Possible values are PHPCAS_SERVICE_OK (on
* success), PHPCAS_SERVICE_PT_NO_SERVER_RESPONSE, PHPCAS_SERVICE_PT_BAD_SERVER_RESPONSE,
* PHPCAS_SERVICE_PT_FAILURE, PHPCAS_SERVICE_NOT AVAILABLE.
* @param $output the output of the service (also used to give an error
* message on failure).
*
* @return TRUE on success, FALSE otherwise (in this later case, $err_code
* gives the reason why it failed and $output contains an error message).
*
* @public
*/
function serviceWeb($url,&$err_code,&$output)
{
phpCAS::traceBegin();
// at first retrieve a PT
$pt = $this->retrievePT($url,$err_code,$output);
$res = TRUE;
// test if PT was retrieved correctly
if ( !$pt ) {
// note: $err_code and $err_msg are filled by CASClient::retrievePT()
phpCAS::trace('PT was not retrieved correctly');
$res = FALSE;
} else {
// add cookies if necessary
if ( is_array($_SESSION['phpCAS']['services'][$url]['cookies']) ) {
foreach ( $_SESSION['phpCAS']['services'][$url]['cookies'] as $name => $val ) {
$cookies[] = $name.'='.$val;
}
}
// build the URL including the PT
if ( strstr($url,'?') === FALSE ) {
$service_url = $url.'?ticket='.$pt;
} else {
$service_url = $url.'&ticket='.$pt;
}
phpCAS::trace('reading URL`'.$service_url.'\'');
if ( !$this->readURL($service_url,$cookies,$headers,$output,$err_msg) ) {
phpCAS::trace('could not read URL`'.$service_url.'\'');
$err_code = PHPCAS_SERVICE_NOT_AVAILABLE;
// give an error message
$output = sprintf($this->getString(CAS_STR_SERVICE_UNAVAILABLE),
$service_url,
$err_msg);
$res = FALSE;
} else {
// URL has been fetched, extract the cookies
phpCAS::trace('URL`'.$service_url.'\' has been read, storing cookies:');
foreach ( $headers as $header ) {
// test if the header is a cookie
if ( preg_match('/^Set-Cookie:/',$header) ) {
// the header is a cookie, remove the beginning
$header_val = preg_replace('/^Set-Cookie: */','',$header);
// extract interesting information
$name_val = strtok($header_val,'; ');
// extract the name and the value of the cookie
$cookie_name = strtok($name_val,'=');
$cookie_val = strtok('=');
// store the cookie
$_SESSION['phpCAS']['services'][$url]['cookies'][$cookie_name] = $cookie_val;
phpCAS::trace($cookie_name.' -> '.$cookie_val);
}
}
}
}
phpCAS::traceEnd($res);
return $res;
}
/**
* This method is used to access an IMAP/POP3/NNTP service.
*
* @param $url a string giving the URL of the service, including the mailing box
* for IMAP URLs, as accepted by imap_open().
* @param $service a string giving for CAS retrieve Proxy ticket
* @param $flags options given to imap_open().
* @param $err_code an error code Possible values are PHPCAS_SERVICE_OK (on
* success), PHPCAS_SERVICE_PT_NO_SERVER_RESPONSE, PHPCAS_SERVICE_PT_BAD_SERVER_RESPONSE,
* PHPCAS_SERVICE_PT_FAILURE, PHPCAS_SERVICE_NOT AVAILABLE.
* @param $err_msg an error message on failure
* @param $pt the Proxy Ticket (PT) retrieved from the CAS server to access the URL
* on success, FALSE on error).
*
* @return an IMAP stream on success, FALSE otherwise (in this later case, $err_code
* gives the reason why it failed and $err_msg contains an error message).
*
* @public
*/
function serviceMail($url,$service,$flags,&$err_code,&$err_msg,&$pt)
{
phpCAS::traceBegin();
// at first retrieve a PT
$pt = $this->retrievePT($service,$err_code,$output);
$stream = FALSE;
// test if PT was retrieved correctly
if ( !$pt ) {
// note: $err_code and $err_msg are filled by CASClient::retrievePT()
phpCAS::trace('PT was not retrieved correctly');
} else {
phpCAS::trace('opening IMAP URL `'.$url.'\'...');
$stream = @imap_open($url,$this->getUser(),$pt,$flags);
if ( !$stream ) {
phpCAS::trace('could not open URL');
$err_code = PHPCAS_SERVICE_NOT_AVAILABLE;
// give an error message
$err_msg = sprintf($this->getString(CAS_STR_SERVICE_UNAVAILABLE),
$service_url,
var_export(imap_errors(),TRUE));
$pt = FALSE;
$stream = FALSE;
} else {
phpCAS::trace('ok');
}
}
phpCAS::traceEnd($stream);
return $stream;
}
/** @} */
// XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
// XX XX
// XX PROXIED CLIENT FEATURES (CAS 2.0) XX
// XX XX
// XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
// ########################################################################
// PT
// ########################################################################
/**
* @addtogroup internalProxied
* @{
*/
/**
* the Proxy Ticket provided in the URL of the request if present
* (empty otherwise). Written by CASClient::CASClient(), read by
* CASClient::getPT() and CASClient::hasPGT().
*
* @hideinitializer
* @private
*/
var $_pt = '';
/**
* This method returns the Proxy Ticket provided in the URL of the request.
* @return The proxy ticket.
* @private
*/
function getPT()
{
// return 'ST'.substr($this->_pt, 2);
return $this->_pt;
}
/**
* This method stores the Proxy Ticket.
* @param $pt The Proxy Ticket.
* @private
*/
function setPT($pt)
{ $this->_pt = $pt; }
/**
* This method tells if a Proxy Ticket was stored.
* @return TRUE if a Proxy Ticket has been stored.
* @private
*/
function hasPT()
{ return !empty($this->_pt); }
/**
* This method returns the SAML Ticket provided in the URL of the request.
* @return The SAML ticket.
* @private
*/
function getSA()
{ return 'ST'.substr($this->_sa, 2); }
/**
* This method stores the SAML Ticket.
* @param $sa The SAML Ticket.
* @private
*/
function setSA($sa)
{ $this->_sa = $sa; }
/**
* This method tells if a SAML Ticket was stored.
* @return TRUE if a SAML Ticket has been stored.
* @private
*/
function hasSA()
{ return !empty($this->_sa); }
/** @} */
// ########################################################################
// PT VALIDATION
// ########################################################################
/**
* @addtogroup internalProxied
* @{
*/
/**
* This method is used to validate a PT; halt on failure
*
* @return bool TRUE when successfull, halt otherwise by calling CASClient::authError().
*
* @private
*/
function validatePT(&$validate_url,&$text_response,&$tree_response)
{
phpCAS::traceBegin();
// build the URL to validate the ticket
$validate_url = $this->getServerProxyValidateURL().'&ticket='.$this->getPT();
if ( $this->isProxy() ) {
// pass the callback url for CAS proxies
$validate_url .= '&pgtUrl='.$this->getCallbackURL();
}
// open and read the URL
if ( !$this->readURL($validate_url,''/*cookies*/,$headers,$text_response,$err_msg) ) {
phpCAS::trace('could not open URL \''.$validate_url.'\' to validate ('.$err_msg.')');
$this->authError('PT not validated',
$validate_url,
TRUE/*$no_response*/);
}
// read the response of the CAS server into a DOM object
if ( !($dom = domxml_open_mem($text_response))) {
// read failed
$this->authError('PT not validated',
$validate_url,
FALSE/*$no_response*/,
TRUE/*$bad_response*/,
$text_response);
}
// read the root node of the XML tree
if ( !($tree_response = $dom->document_element()) ) {
// read failed
$this->authError('PT not validated',
$validate_url,
FALSE/*$no_response*/,
TRUE/*$bad_response*/,
$text_response);
}
// insure that tag name is 'serviceResponse'
if ( $tree_response->node_name() != 'serviceResponse' ) {
// bad root node
$this->authError('PT not validated',
$validate_url,
FALSE/*$no_response*/,
TRUE/*$bad_response*/,
$text_response);
}
if ( sizeof($arr = $tree_response->get_elements_by_tagname("authenticationSuccess")) != 0) {
// authentication succeded, extract the user name
if ( sizeof($arr = $tree_response->get_elements_by_tagname("user")) == 0) {
// no user specified => error
$this->authError('PT not validated',
$validate_url,
FALSE/*$no_response*/,
TRUE/*$bad_response*/,
$text_response);
}
$this->setUser(trim($arr[0]->get_content()));
} else if ( sizeof($arr = $tree_response->get_elements_by_tagname("authenticationFailure")) != 0) {
// authentication succeded, extract the error code and message
$this->authError('PT not validated',
$validate_url,
FALSE/*$no_response*/,
FALSE/*$bad_response*/,
$text_response,
$arr[0]->get_attribute('code')/*$err_code*/,
trim($arr[0]->get_content())/*$err_msg*/);
} else {
$this->authError('PT not validated',
$validate_url,
FALSE/*$no_response*/,
TRUE/*$bad_response*/,
$text_response);
}
// at this step, PT has been validated and $this->_user has been set,
phpCAS::traceEnd(TRUE);
return TRUE;
}
/** @} */
// XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
// XX XX
// XX MISC XX
// XX XX
// XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
/**
* @addtogroup internalMisc
* @{
*/
// ########################################################################
// URL
// ########################################################################
/**
* the URL of the current request (without any ticket CGI parameter). Written
* and read by CASClient::getURL().
*
* @hideinitializer
* @private
*/
var $_url = '';
/**
* This method returns the URL of the current request (without any ticket
* CGI parameter).
*
* @return The URL
*
* @private
*/
function getURL()
{
phpCAS::traceBegin();
// the URL is built when needed only
if ( empty($this->_url) ) {
$final_uri = '';
// remove the ticket if present in the URL
$final_uri = ($this->isHttps()) ? 'https' : 'http';
$final_uri .= '://';
/* replaced by Julien Marchal - v0.4.6
* $this->_url .= $_SERVER['SERVER_NAME'];
*/
if(empty($_SERVER['HTTP_X_FORWARDED_SERVER'])){
/* replaced by teedog - v0.4.12
* $this->_url .= $_SERVER['SERVER_NAME'];
*/
if (empty($_SERVER['SERVER_NAME'])) {
$server_name = $_SERVER['HTTP_HOST'];
} else {
$server_name = $_SERVER['SERVER_NAME'];
}
} else {
$server_name = $_SERVER['HTTP_X_FORWARDED_SERVER'];
}
$final_uri .= $server_name;
if (!strpos($server_name, ':')) {
if ( ($this->isHttps() && $_SERVER['SERVER_PORT']!=443)
|| (!$this->isHttps() && $_SERVER['SERVER_PORT']!=80) ) {
$final_uri .= ':';
$final_uri .= $_SERVER['SERVER_PORT'];
}
}
$php_is_for_sissies = split("\?", $_SERVER['REQUEST_URI'], 2);
$final_uri .= $php_is_for_sissies[0];
if(sizeof($php_is_for_sissies) > 1){
$cgi_params = '?' . $php_is_for_sissies[1];
} else {
$cgi_params = '?';
}
// remove the ticket if present in the CGI parameters
$cgi_params = preg_replace('/&ticket=[^&]*/','',$cgi_params);
$cgi_params = preg_replace('/\?ticket=[^&;]*/','?',$cgi_params);
$cgi_params = preg_replace('/\?%26/','?',$cgi_params);
$cgi_params = preg_replace('/\?&/','?',$cgi_params);
$cgi_params = preg_replace('/\?$/','',$cgi_params);
$final_uri .= $cgi_params;
$this->setURL($final_uri);
}
phpCAS::traceEnd($this->_url);
return $this->_url;
}
/**
* This method sets the URL of the current request
*
* @param $url url to set for service
*
* @private
*/
function setURL($url)
{
$this->_url = $url;
}
// ########################################################################
// AUTHENTICATION ERROR HANDLING
// ########################################################################
/**
* This method is used to print the HTML output when the user was not authenticated.
*
* @param $failure the failure that occured
* @param $cas_url the URL the CAS server was asked for
* @param $no_response the response from the CAS server (other
* parameters are ignored if TRUE)
* @param $bad_response bad response from the CAS server ($err_code
* and $err_msg ignored if TRUE)
* @param $cas_response the response of the CAS server
* @param $err_code the error code given by the CAS server
* @param $err_msg the error message given by the CAS server
*
* @private
*/
function authError($failure,$cas_url,$no_response,$bad_response='',$cas_response='',$err_code='',$err_msg='')
{
phpCAS::traceBegin();
$this->printHTMLHeader($this->getString(CAS_STR_AUTHENTICATION_FAILED));
printf($this->getString(CAS_STR_YOU_WERE_NOT_AUTHENTICATED),$this->getURL(),$_SERVER['SERVER_ADMIN']);
phpCAS::trace('CAS URL: '.$cas_url);
phpCAS::trace('Authentication failure: '.$failure);
if ( $no_response ) {
phpCAS::trace('Reason: no response from the CAS server');
} else {
if ( $bad_response ) {
phpCAS::trace('Reason: bad response from the CAS server');
} else {
switch ($this->getServerVersion()) {
case CAS_VERSION_1_0:
phpCAS::trace('Reason: CAS error');
break;
case CAS_VERSION_2_0:
if ( empty($err_code) )
phpCAS::trace('Reason: no CAS error');
else
phpCAS::trace('Reason: ['.$err_code.'] CAS error: '.$err_msg);
break;
}
}
phpCAS::trace('CAS response: '.$cas_response);
}
$this->printHTMLFooter();
phpCAS::traceExit();
exit();
}
/** @} */
}
?>
|
