aboutsummaryrefslogtreecommitdiffstats
path: root/src/crypto/tls_openssl.c
blob: 2bb606d37a1a6216a0c427eebcd00666ed82d853 (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
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
2676
2677
2678
2679
2680
2681
2682
2683
2684
2685
2686
2687
2688
2689
2690
2691
2692
2693
2694
2695
2696
2697
2698
2699
2700
2701
2702
2703
2704
2705
2706
2707
2708
2709
2710
2711
2712
2713
2714
2715
2716
2717
2718
2719
2720
2721
2722
2723
2724
2725
2726
2727
2728
2729
2730
2731
2732
2733
2734
2735
2736
2737
2738
2739
2740
2741
2742
2743
2744
2745
2746
2747
2748
2749
2750
2751
2752
2753
2754
2755
2756
2757
2758
2759
2760
2761
2762
2763
2764
2765
2766
2767
2768
2769
2770
2771
2772
2773
2774
2775
2776
2777
2778
2779
2780
2781
2782
2783
2784
2785
2786
2787
2788
2789
2790
2791
2792
2793
2794
2795
2796
2797
2798
2799
2800
2801
2802
2803
2804
2805
2806
2807
2808
2809
2810
2811
2812
2813
2814
2815
2816
2817
2818
2819
2820
2821
2822
2823
2824
2825
2826
2827
2828
2829
2830
2831
2832
2833
2834
2835
2836
2837
2838
2839
2840
2841
2842
2843
2844
2845
2846
2847
2848
2849
2850
2851
2852
2853
2854
2855
2856
2857
2858
2859
2860
2861
2862
2863
2864
2865
2866
2867
2868
2869
2870
2871
2872
2873
2874
2875
2876
2877
2878
2879
2880
2881
2882
2883
2884
2885
2886
2887
2888
2889
2890
2891
2892
2893
2894
2895
2896
2897
2898
2899
2900
2901
2902
2903
2904
2905
2906
2907
2908
2909
2910
2911
2912
2913
2914
2915
2916
2917
2918
2919
2920
2921
2922
2923
2924
2925
2926
2927
2928
2929
2930
2931
2932
2933
2934
2935
2936
2937
2938
2939
2940
2941
2942
2943
2944
2945
2946
2947
2948
2949
2950
2951
2952
2953
2954
2955
2956
2957
2958
2959
2960
2961
2962
2963
2964
2965
2966
2967
2968
2969
2970
2971
2972
2973
2974
2975
2976
2977
2978
2979
2980
2981
2982
2983
2984
2985
2986
2987
2988
2989
2990
2991
2992
2993
2994
2995
2996
2997
2998
2999
3000
3001
3002
3003
3004
3005
3006
3007
3008
3009
3010
3011
3012
3013
3014
3015
3016
3017
3018
3019
3020
3021
3022
3023
3024
3025
3026
3027
3028
3029
3030
3031
3032
3033
3034
3035
3036
3037
3038
3039
3040
3041
3042
3043
3044
3045
3046
3047
3048
3049
3050
3051
3052
3053
3054
3055
3056
3057
3058
3059
3060
3061
3062
3063
3064
3065
3066
3067
3068
3069
3070
3071
3072
3073
3074
3075
3076
3077
3078
3079
3080
3081
3082
3083
3084
3085
3086
3087
3088
3089
3090
3091
3092
3093
3094
3095
3096
3097
3098
3099
3100
3101
3102
3103
3104
3105
3106
3107
3108
3109
3110
3111
3112
3113
3114
3115
3116
3117
3118
3119
3120
3121
3122
3123
3124
3125
3126
3127
3128
3129
3130
3131
3132
3133
3134
3135
3136
3137
3138
3139
3140
3141
3142
3143
3144
3145
3146
3147
3148
3149
3150
3151
3152
3153
3154
3155
3156
3157
3158
3159
3160
3161
3162
3163
3164
3165
3166
3167
3168
3169
3170
3171
3172
3173
3174
3175
3176
3177
3178
3179
3180
3181
3182
3183
3184
3185
3186
3187
3188
3189
3190
3191
3192
3193
3194
3195
3196
3197
3198
3199
3200
3201
3202
3203
3204
3205
3206
3207
3208
3209
3210
3211
3212
3213
3214
3215
3216
3217
3218
3219
3220
3221
3222
3223
3224
3225
3226
3227
3228
3229
3230
3231
3232
3233
3234
3235
3236
3237
3238
3239
3240
3241
3242
3243
3244
3245
3246
3247
3248
3249
3250
3251
3252
3253
3254
3255
3256
3257
3258
3259
3260
3261
3262
3263
3264
3265
3266
3267
3268
3269
3270
3271
3272
3273
3274
3275
3276
3277
3278
3279
3280
3281
3282
3283
3284
3285
3286
3287
3288
3289
3290
3291
3292
3293
3294
3295
3296
3297
3298
3299
3300
3301
3302
3303
3304
3305
3306
3307
3308
3309
3310
3311
3312
3313
3314
3315
3316
3317
3318
3319
3320
3321
3322
3323
3324
3325
3326
3327
3328
3329
3330
3331
3332
3333
3334
3335
3336
3337
3338
3339
3340
3341
3342
3343
3344
3345
3346
3347
3348
3349
3350
3351
3352
3353
3354
3355
3356
3357
3358
3359
3360
3361
3362
3363
3364
3365
3366
3367
3368
3369
3370
3371
3372
3373
3374
3375
3376
3377
3378
3379
3380
3381
3382
3383
3384
3385
3386
3387
3388
3389
3390
3391
3392
3393
3394
3395
3396
3397
3398
3399
3400
3401
3402
3403
3404
3405
3406
3407
3408
3409
3410
3411
3412
3413
3414
3415
3416
3417
3418
3419
3420
3421
3422
3423
3424
3425
3426
3427
3428
3429
3430
3431
3432
3433
3434
3435
3436
3437
3438
3439
3440
3441
3442
3443
3444
3445
3446
3447
3448
3449
3450
3451
3452
3453
3454
3455
3456
3457
3458
3459
3460
3461
3462
3463
3464
3465
3466
3467
3468
3469
3470
3471
3472
3473
3474
3475
3476
3477
3478
3479
3480
3481
3482
3483
3484
3485
3486
3487
3488
3489
3490
3491
3492
3493
3494
3495
3496
3497
3498
3499
3500
3501
3502
3503
3504
3505
3506
3507
3508
3509
3510
3511
3512
3513
3514
3515
3516
3517
3518
3519
3520
3521
3522
3523
3524
3525
3526
3527
3528
3529
3530
3531
3532
3533
3534
3535
3536
3537
3538
3539
3540
3541
3542
3543
3544
3545
3546
3547
3548
3549
3550
3551
3552
3553
3554
3555
3556
3557
3558
3559
3560
3561
3562
3563
3564
3565
3566
3567
3568
3569
3570
3571
3572
3573
3574
3575
3576
3577
3578
3579
3580
3581
3582
3583
3584
3585
3586
3587
3588
3589
3590
3591
3592
3593
3594
3595
3596
3597
3598
3599
3600
3601
3602
3603
3604
3605
3606
3607
3608
3609
3610
3611
3612
3613
3614
3615
3616
3617
3618
3619
3620
3621
3622
3623
3624
3625
3626
3627
3628
3629
3630
3631
3632
3633
3634
3635
3636
3637
3638
3639
3640
3641
3642
3643
3644
3645
3646
3647
3648
3649
3650
3651
3652
3653
3654
3655
3656
3657
3658
3659
3660
3661
3662
3663
3664
3665
3666
3667
3668
3669
3670
3671
3672
3673
3674
3675
3676
3677
3678
3679
3680
3681
3682
3683
3684
3685
3686
3687
3688
3689
3690
3691
3692
3693
3694
3695
3696
3697
3698
3699
3700
3701
3702
3703
3704
3705
3706
3707
3708
3709
3710
3711
3712
3713
3714
3715
3716
3717
3718
3719
3720
3721
3722
3723
3724
3725
3726
3727
3728
3729
3730
3731
3732
3733
3734
3735
3736
3737
3738
3739
3740
3741
3742
3743
3744
3745
3746
3747
3748
3749
3750
3751
3752
3753
3754
3755
3756
3757
3758
3759
3760
3761
3762
3763
3764
3765
3766
3767
3768
3769
3770
3771
3772
3773
3774
3775
3776
3777
3778
3779
3780
3781
3782
3783
3784
3785
3786
3787
3788
3789
3790
3791
3792
3793
3794
3795
3796
3797
3798
3799
3800
3801
3802
3803
3804
3805
3806
3807
3808
3809
3810
3811
3812
3813
3814
3815
3816
3817
3818
3819
3820
3821
3822
3823
3824
3825
3826
3827
3828
3829
3830
3831
3832
3833
3834
3835
3836
3837
3838
3839
3840
3841
3842
3843
3844
3845
3846
3847
3848
3849
3850
3851
3852
3853
3854
3855
3856
3857
3858
3859
3860
3861
3862
3863
3864
3865
3866
3867
3868
3869
3870
3871
3872
3873
3874
3875
3876
3877
3878
3879
3880
3881
3882
3883
3884
3885
3886
3887
3888
3889
3890
3891
3892
3893
3894
3895
3896
3897
3898
3899
3900
3901
3902
3903
3904
3905
3906
3907
3908
3909
3910
3911
3912
3913
3914
3915
3916
3917
3918
3919
3920
3921
3922
3923
3924
3925
3926
3927
3928
3929
3930
3931
3932
3933
3934
3935
3936
3937
3938
3939
3940
3941
3942
3943
3944
3945
3946
3947
3948
3949
3950
3951
3952
3953
3954
3955
3956
3957
3958
3959
3960
3961
3962
3963
3964
3965
3966
3967
3968
3969
3970
3971
3972
3973
3974
3975
3976
3977
3978
3979
3980
3981
3982
3983
3984
3985
3986
3987
3988
3989
3990
3991
3992
3993
3994
3995
3996
3997
3998
3999
4000
4001
4002
4003
4004
4005
4006
4007
4008
4009
4010
4011
4012
4013
4014
4015
4016
4017
4018
4019
4020
4021
4022
4023
4024
4025
4026
4027
4028
4029
4030
4031
4032
4033
4034
4035
4036
4037
4038
4039
4040
4041
4042
4043
4044
4045
4046
4047
4048
4049
4050
4051
4052
4053
4054
4055
4056
4057
4058
4059
4060
4061
4062
4063
4064
4065
4066
4067
4068
4069
4070
4071
4072
4073
4074
4075
4076
4077
4078
4079
4080
4081
4082
4083
4084
4085
4086
4087
4088
4089
4090
4091
4092
4093
4094
4095
4096
4097
4098
4099
4100
4101
4102
4103
4104
4105
4106
4107
4108
4109
4110
4111
4112
4113
4114
4115
4116
4117
4118
4119
4120
4121
4122
4123
4124
4125
4126
4127
4128
4129
4130
4131
4132
4133
4134
4135
4136
4137
4138
4139
4140
4141
4142
4143
4144
4145
4146
4147
4148
4149
4150
4151
4152
4153
4154
4155
4156
4157
4158
4159
4160
4161
4162
4163
4164
4165
4166
4167
4168
4169
4170
4171
4172
4173
4174
4175
4176
4177
4178
4179
4180
4181
4182
4183
4184
4185
4186
4187
4188
4189
4190
4191
4192
4193
4194
4195
4196
4197
4198
4199
4200
4201
4202
4203
4204
4205
4206
4207
4208
4209
4210
4211
4212
4213
4214
4215
4216
4217
4218
4219
4220
4221
4222
4223
4224
4225
4226
4227
4228
4229
4230
4231
4232
4233
4234
4235
4236
4237
4238
4239
4240
4241
4242
4243
4244
4245
4246
4247
4248
4249
4250
4251
4252
4253
4254
4255
4256
4257
4258
4259
4260
4261
4262
4263
4264
4265
4266
4267
4268
4269
4270
4271
4272
4273
4274
4275
4276
4277
4278
4279
4280
4281
4282
4283
4284
4285
4286
4287
4288
4289
4290
4291
4292
4293
4294
4295
4296
4297
4298
4299
4300
4301
4302
4303
4304
4305
4306
/*
 * SSL/TLS interface functions for OpenSSL
 * Copyright (c) 2004-2015, Jouni Malinen <j@w1.fi>
 *
 * This software may be distributed under the terms of the BSD license.
 * See README for more details.
 */

#include "includes.h"

#ifndef CONFIG_SMARTCARD
#ifndef OPENSSL_NO_ENGINE
#ifndef ANDROID
#define OPENSSL_NO_ENGINE
#endif
#endif
#endif

#include <openssl/ssl.h>
#include <openssl/err.h>
#include <openssl/pkcs12.h>
#include <openssl/x509v3.h>
#ifndef OPENSSL_NO_ENGINE
#include <openssl/engine.h>
#endif /* OPENSSL_NO_ENGINE */
#ifndef OPENSSL_NO_DSA
#include <openssl/dsa.h>
#endif
#ifndef OPENSSL_NO_DH
#include <openssl/dh.h>
#endif

#include "common.h"
#include "crypto.h"
#include "sha1.h"
#include "sha256.h"
#include "tls.h"
#include "tls_openssl.h"

#if defined(OPENSSL_IS_BORINGSSL)
/* stack_index_t is the return type of OpenSSL's sk_XXX_num() functions. */
typedef size_t stack_index_t;
#else
typedef int stack_index_t;
#endif

#ifdef SSL_set_tlsext_status_type
#ifndef OPENSSL_NO_TLSEXT
#define HAVE_OCSP
#include <openssl/ocsp.h>
#endif /* OPENSSL_NO_TLSEXT */
#endif /* SSL_set_tlsext_status_type */

#if OPENSSL_VERSION_NUMBER < 0x10100000L || defined(LIBRESSL_VERSION_NUMBER)
/*
 * SSL_get_client_random() and SSL_get_server_random() were added in OpenSSL
 * 1.1.0. Provide compatibility wrappers for older versions.
 */

static size_t SSL_get_client_random(const SSL *ssl, unsigned char *out,
				    size_t outlen)
{
	if (!ssl->s3 || outlen < SSL3_RANDOM_SIZE)
		return 0;
	os_memcpy(out, ssl->s3->client_random, SSL3_RANDOM_SIZE);
	return SSL3_RANDOM_SIZE;
}


static size_t SSL_get_server_random(const SSL *ssl, unsigned char *out,
				    size_t outlen)
{
	if (!ssl->s3 || outlen < SSL3_RANDOM_SIZE)
		return 0;
	os_memcpy(out, ssl->s3->server_random, SSL3_RANDOM_SIZE);
	return SSL3_RANDOM_SIZE;
}


static size_t SSL_SESSION_get_master_key(const SSL_SESSION *session,
					 unsigned char *out, size_t outlen)
{
	if (!session || session->master_key_length < 0 ||
	    (size_t) session->master_key_length > outlen)
		return 0;
	if ((size_t) session->master_key_length < outlen)
		outlen = session->master_key_length;
	os_memcpy(out, session->master_key, outlen);
	return outlen;
}

#endif

#ifdef ANDROID
#include <openssl/pem.h>
#include <keystore/keystore_get.h>

static BIO * BIO_from_keystore(const char *key)
{
	BIO *bio = NULL;
	uint8_t *value = NULL;
	int length = keystore_get(key, strlen(key), &value);
	if (length != -1 && (bio = BIO_new(BIO_s_mem())) != NULL)
		BIO_write(bio, value, length);
	free(value);
	return bio;
}


static int tls_add_ca_from_keystore(X509_STORE *ctx, const char *key_alias)
{
	BIO *bio = BIO_from_keystore(key_alias);
	STACK_OF(X509_INFO) *stack = NULL;
	stack_index_t i;

	if (bio) {
		stack = PEM_X509_INFO_read_bio(bio, NULL, NULL, NULL);
		BIO_free(bio);
	}

	if (!stack) {
		wpa_printf(MSG_WARNING, "TLS: Failed to parse certificate: %s",
			   key_alias);
		return -1;
	}

	for (i = 0; i < sk_X509_INFO_num(stack); ++i) {
		X509_INFO *info = sk_X509_INFO_value(stack, i);

		if (info->x509)
			X509_STORE_add_cert(ctx, info->x509);
		if (info->crl)
			X509_STORE_add_crl(ctx, info->crl);
	}

	sk_X509_INFO_pop_free(stack, X509_INFO_free);

	return 0;
}


static int tls_add_ca_from_keystore_encoded(X509_STORE *ctx,
					    const char *encoded_key_alias)
{
	int rc = -1;
	int len = os_strlen(encoded_key_alias);
	unsigned char *decoded_alias;

	if (len & 1) {
		wpa_printf(MSG_WARNING, "Invalid hex-encoded alias: %s",
			   encoded_key_alias);
		return rc;
	}

	decoded_alias = os_malloc(len / 2 + 1);
	if (decoded_alias) {
		if (!hexstr2bin(encoded_key_alias, decoded_alias, len / 2)) {
			decoded_alias[len / 2] = '\0';
			rc = tls_add_ca_from_keystore(
				ctx, (const char *) decoded_alias);
		}
		os_free(decoded_alias);
	}

	return rc;
}

#endif /* ANDROID */

static int tls_openssl_ref_count = 0;
static int tls_ex_idx_session = -1;

struct tls_context {
	void (*event_cb)(void *ctx, enum tls_event ev,
			 union tls_event_data *data);
	void *cb_ctx;
	int cert_in_cb;
	char *ocsp_stapling_response;
};

static struct tls_context *tls_global = NULL;


struct tls_data {
	SSL_CTX *ssl;
	unsigned int tls_session_lifetime;
};

struct tls_connection {
	struct tls_context *context;
	SSL_CTX *ssl_ctx;
	SSL *ssl;
	BIO *ssl_in, *ssl_out;
#if defined(ANDROID) || !defined(OPENSSL_NO_ENGINE)
	ENGINE *engine;        /* functional reference to the engine */
	EVP_PKEY *private_key; /* the private key if using engine */
#endif /* OPENSSL_NO_ENGINE */
	char *subject_match, *altsubject_match, *suffix_match, *domain_match;
	int read_alerts, write_alerts, failed;

	tls_session_ticket_cb session_ticket_cb;
	void *session_ticket_cb_ctx;

	/* SessionTicket received from OpenSSL hello_extension_cb (server) */
	u8 *session_ticket;
	size_t session_ticket_len;

	unsigned int ca_cert_verify:1;
	unsigned int cert_probe:1;
	unsigned int server_cert_only:1;
	unsigned int invalid_hb_used:1;
	unsigned int success_data:1;

	u8 srv_cert_hash[32];

	unsigned int flags;

	X509 *peer_cert;
	X509 *peer_issuer;
	X509 *peer_issuer_issuer;

	unsigned char client_random[SSL3_RANDOM_SIZE];
	unsigned char server_random[SSL3_RANDOM_SIZE];
};


static struct tls_context * tls_context_new(const struct tls_config *conf)
{
	struct tls_context *context = os_zalloc(sizeof(*context));
	if (context == NULL)
		return NULL;
	if (conf) {
		context->event_cb = conf->event_cb;
		context->cb_ctx = conf->cb_ctx;
		context->cert_in_cb = conf->cert_in_cb;
	}
	return context;
}


#ifdef CONFIG_NO_STDOUT_DEBUG

static void _tls_show_errors(void)
{
	unsigned long err;

	while ((err = ERR_get_error())) {
		/* Just ignore the errors, since stdout is disabled */
	}
}
#define tls_show_errors(l, f, t) _tls_show_errors()

#else /* CONFIG_NO_STDOUT_DEBUG */

static void tls_show_errors(int level, const char *func, const char *txt)
{
	unsigned long err;

	wpa_printf(level, "OpenSSL: %s - %s %s",
		   func, txt, ERR_error_string(ERR_get_error(), NULL));

	while ((err = ERR_get_error())) {
		wpa_printf(MSG_INFO, "OpenSSL: pending error: %s",
			   ERR_error_string(err, NULL));
	}
}

#endif /* CONFIG_NO_STDOUT_DEBUG */


#ifdef CONFIG_NATIVE_WINDOWS

/* Windows CryptoAPI and access to certificate stores */
#include <wincrypt.h>

#ifdef __MINGW32_VERSION
/*
 * MinGW does not yet include all the needed definitions for CryptoAPI, so
 * define here whatever extra is needed.
 */
#define CERT_SYSTEM_STORE_CURRENT_USER (1 << 16)
#define CERT_STORE_READONLY_FLAG 0x00008000
#define CERT_STORE_OPEN_EXISTING_FLAG 0x00004000

#endif /* __MINGW32_VERSION */


struct cryptoapi_rsa_data {
	const CERT_CONTEXT *cert;
	HCRYPTPROV crypt_prov;
	DWORD key_spec;
	BOOL free_crypt_prov;
};


static void cryptoapi_error(const char *msg)
{
	wpa_printf(MSG_INFO, "CryptoAPI: %s; err=%u",
		   msg, (unsigned int) GetLastError());
}


static int cryptoapi_rsa_pub_enc(int flen, const unsigned char *from,
				 unsigned char *to, RSA *rsa, int padding)
{
	wpa_printf(MSG_DEBUG, "%s - not implemented", __func__);
	return 0;
}


static int cryptoapi_rsa_pub_dec(int flen, const unsigned char *from,
				 unsigned char *to, RSA *rsa, int padding)
{
	wpa_printf(MSG_DEBUG, "%s - not implemented", __func__);
	return 0;
}


static int cryptoapi_rsa_priv_enc(int flen, const unsigned char *from,
				  unsigned char *to, RSA *rsa, int padding)
{
	struct cryptoapi_rsa_data *priv =
		(struct cryptoapi_rsa_data *) rsa->meth->app_data;
	HCRYPTHASH hash;
	DWORD hash_size, len, i;
	unsigned char *buf = NULL;
	int ret = 0;

	if (priv == NULL) {
		RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT,
		       ERR_R_PASSED_NULL_PARAMETER);
		return 0;
	}

	if (padding != RSA_PKCS1_PADDING) {
		RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT,
		       RSA_R_UNKNOWN_PADDING_TYPE);
		return 0;
	}

	if (flen != 16 /* MD5 */ + 20 /* SHA-1 */) {
		wpa_printf(MSG_INFO, "%s - only MD5-SHA1 hash supported",
			   __func__);
		RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT,
		       RSA_R_INVALID_MESSAGE_LENGTH);
		return 0;
	}

	if (!CryptCreateHash(priv->crypt_prov, CALG_SSL3_SHAMD5, 0, 0, &hash))
	{
		cryptoapi_error("CryptCreateHash failed");
		return 0;
	}

	len = sizeof(hash_size);
	if (!CryptGetHashParam(hash, HP_HASHSIZE, (BYTE *) &hash_size, &len,
			       0)) {
		cryptoapi_error("CryptGetHashParam failed");
		goto err;
	}

	if ((int) hash_size != flen) {
		wpa_printf(MSG_INFO, "CryptoAPI: Invalid hash size (%u != %d)",
			   (unsigned) hash_size, flen);
		RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT,
		       RSA_R_INVALID_MESSAGE_LENGTH);
		goto err;
	}
	if (!CryptSetHashParam(hash, HP_HASHVAL, (BYTE * ) from, 0)) {
		cryptoapi_error("CryptSetHashParam failed");
		goto err;
	}

	len = RSA_size(rsa);
	buf = os_malloc(len);
	if (buf == NULL) {
		RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT, ERR_R_MALLOC_FAILURE);
		goto err;
	}

	if (!CryptSignHash(hash, priv->key_spec, NULL, 0, buf, &len)) {
		cryptoapi_error("CryptSignHash failed");
		goto err;
	}

	for (i = 0; i < len; i++)
		to[i] = buf[len - i - 1];
	ret = len;

err:
	os_free(buf);
	CryptDestroyHash(hash);

	return ret;
}


static int cryptoapi_rsa_priv_dec(int flen, const unsigned char *from,
				  unsigned char *to, RSA *rsa, int padding)
{
	wpa_printf(MSG_DEBUG, "%s - not implemented", __func__);
	return 0;
}


static void cryptoapi_free_data(struct cryptoapi_rsa_data *priv)
{
	if (priv == NULL)
		return;
	if (priv->crypt_prov && priv->free_crypt_prov)
		CryptReleaseContext(priv->crypt_prov, 0);
	if (priv->cert)
		CertFreeCertificateContext(priv->cert);
	os_free(priv);
}


static int cryptoapi_finish(RSA *rsa)
{
	cryptoapi_free_data((struct cryptoapi_rsa_data *) rsa->meth->app_data);
	os_free((void *) rsa->meth);
	rsa->meth = NULL;
	return 1;
}


static const CERT_CONTEXT * cryptoapi_find_cert(const char *name, DWORD store)
{
	HCERTSTORE cs;
	const CERT_CONTEXT *ret = NULL;

	cs = CertOpenStore((LPCSTR) CERT_STORE_PROV_SYSTEM, 0, 0,
			   store | CERT_STORE_OPEN_EXISTING_FLAG |
			   CERT_STORE_READONLY_FLAG, L"MY");
	if (cs == NULL) {
		cryptoapi_error("Failed to open 'My system store'");
		return NULL;
	}

	if (strncmp(name, "cert://", 7) == 0) {
		unsigned short wbuf[255];
		MultiByteToWideChar(CP_ACP, 0, name + 7, -1, wbuf, 255);
		ret = CertFindCertificateInStore(cs, X509_ASN_ENCODING |
						 PKCS_7_ASN_ENCODING,
						 0, CERT_FIND_SUBJECT_STR,
						 wbuf, NULL);
	} else if (strncmp(name, "hash://", 7) == 0) {
		CRYPT_HASH_BLOB blob;
		int len;
		const char *hash = name + 7;
		unsigned char *buf;

		len = os_strlen(hash) / 2;
		buf = os_malloc(len);
		if (buf && hexstr2bin(hash, buf, len) == 0) {
			blob.cbData = len;
			blob.pbData = buf;
			ret = CertFindCertificateInStore(cs,
							 X509_ASN_ENCODING |
							 PKCS_7_ASN_ENCODING,
							 0, CERT_FIND_HASH,
							 &blob, NULL);
		}
		os_free(buf);
	}

	CertCloseStore(cs, 0);

	return ret;
}


static int tls_cryptoapi_cert(SSL *ssl, const char *name)
{
	X509 *cert = NULL;
	RSA *rsa = NULL, *pub_rsa;
	struct cryptoapi_rsa_data *priv;
	RSA_METHOD *rsa_meth;

	if (name == NULL ||
	    (strncmp(name, "cert://", 7) != 0 &&
	     strncmp(name, "hash://", 7) != 0))
		return -1;

	priv = os_zalloc(sizeof(*priv));
	rsa_meth = os_zalloc(sizeof(*rsa_meth));
	if (priv == NULL || rsa_meth == NULL) {
		wpa_printf(MSG_WARNING, "CryptoAPI: Failed to allocate memory "
			   "for CryptoAPI RSA method");
		os_free(priv);
		os_free(rsa_meth);
		return -1;
	}

	priv->cert = cryptoapi_find_cert(name, CERT_SYSTEM_STORE_CURRENT_USER);
	if (priv->cert == NULL) {
		priv->cert = cryptoapi_find_cert(
			name, CERT_SYSTEM_STORE_LOCAL_MACHINE);
	}
	if (priv->cert == NULL) {
		wpa_printf(MSG_INFO, "CryptoAPI: Could not find certificate "
			   "'%s'", name);
		goto err;
	}

	cert = d2i_X509(NULL,
			(const unsigned char **) &priv->cert->pbCertEncoded,
			priv->cert->cbCertEncoded);
	if (cert == NULL) {
		wpa_printf(MSG_INFO, "CryptoAPI: Could not process X509 DER "
			   "encoding");
		goto err;
	}

	if (!CryptAcquireCertificatePrivateKey(priv->cert,
					       CRYPT_ACQUIRE_COMPARE_KEY_FLAG,
					       NULL, &priv->crypt_prov,
					       &priv->key_spec,
					       &priv->free_crypt_prov)) {
		cryptoapi_error("Failed to acquire a private key for the "
				"certificate");
		goto err;
	}

	rsa_meth->name = "Microsoft CryptoAPI RSA Method";
	rsa_meth->rsa_pub_enc = cryptoapi_rsa_pub_enc;
	rsa_meth->rsa_pub_dec = cryptoapi_rsa_pub_dec;
	rsa_meth->rsa_priv_enc = cryptoapi_rsa_priv_enc;
	rsa_meth->rsa_priv_dec = cryptoapi_rsa_priv_dec;
	rsa_meth->finish = cryptoapi_finish;
	rsa_meth->flags = RSA_METHOD_FLAG_NO_CHECK;
	rsa_meth->app_data = (char *) priv;

	rsa = RSA_new();
	if (rsa == NULL) {
		SSLerr(SSL_F_SSL_CTX_USE_CERTIFICATE_FILE,
		       ERR_R_MALLOC_FAILURE);
		goto err;
	}

	if (!SSL_use_certificate(ssl, cert)) {
		RSA_free(rsa);
		rsa = NULL;
		goto err;
	}
	pub_rsa = cert->cert_info->key->pkey->pkey.rsa;
	X509_free(cert);
	cert = NULL;

	rsa->n = BN_dup(pub_rsa->n);
	rsa->e = BN_dup(pub_rsa->e);
	if (!RSA_set_method(rsa, rsa_meth))
		goto err;

	if (!SSL_use_RSAPrivateKey(ssl, rsa))
		goto err;
	RSA_free(rsa);

	return 0;

err:
	if (cert)
		X509_free(cert);
	if (rsa)
		RSA_free(rsa);
	else {
		os_free(rsa_meth);
		cryptoapi_free_data(priv);
	}
	return -1;
}


static int tls_cryptoapi_ca_cert(SSL_CTX *ssl_ctx, SSL *ssl, const char *name)
{
	HCERTSTORE cs;
	PCCERT_CONTEXT ctx = NULL;
	X509 *cert;
	char buf[128];
	const char *store;
#ifdef UNICODE
	WCHAR *wstore;
#endif /* UNICODE */

	if (name == NULL || strncmp(name, "cert_store://", 13) != 0)
		return -1;

	store = name + 13;
#ifdef UNICODE
	wstore = os_malloc((os_strlen(store) + 1) * sizeof(WCHAR));
	if (wstore == NULL)
		return -1;
	wsprintf(wstore, L"%S", store);
	cs = CertOpenSystemStore(0, wstore);
	os_free(wstore);
#else /* UNICODE */
	cs = CertOpenSystemStore(0, store);
#endif /* UNICODE */
	if (cs == NULL) {
		wpa_printf(MSG_DEBUG, "%s: failed to open system cert store "
			   "'%s': error=%d", __func__, store,
			   (int) GetLastError());
		return -1;
	}

	while ((ctx = CertEnumCertificatesInStore(cs, ctx))) {
		cert = d2i_X509(NULL,
				(const unsigned char **) &ctx->pbCertEncoded,
				ctx->cbCertEncoded);
		if (cert == NULL) {
			wpa_printf(MSG_INFO, "CryptoAPI: Could not process "
				   "X509 DER encoding for CA cert");
			continue;
		}

		X509_NAME_oneline(X509_get_subject_name(cert), buf,
				  sizeof(buf));
		wpa_printf(MSG_DEBUG, "OpenSSL: Loaded CA certificate for "
			   "system certificate store: subject='%s'", buf);

		if (!X509_STORE_add_cert(ssl_ctx->cert_store, cert)) {
			tls_show_errors(MSG_WARNING, __func__,
					"Failed to add ca_cert to OpenSSL "
					"certificate store");
		}

		X509_free(cert);
	}

	if (!CertCloseStore(cs, 0)) {
		wpa_printf(MSG_DEBUG, "%s: failed to close system cert store "
			   "'%s': error=%d", __func__, name + 13,
			   (int) GetLastError());
	}

	return 0;
}


#else /* CONFIG_NATIVE_WINDOWS */

static int tls_cryptoapi_cert(SSL *ssl, const char *name)
{
	return -1;
}

#endif /* CONFIG_NATIVE_WINDOWS */


static void ssl_info_cb(const SSL *ssl, int where, int ret)
{
	const char *str;
	int w;

	wpa_printf(MSG_DEBUG, "SSL: (where=0x%x ret=0x%x)", where, ret);
	w = where & ~SSL_ST_MASK;
	if (w & SSL_ST_CONNECT)
		str = "SSL_connect";
	else if (w & SSL_ST_ACCEPT)
		str = "SSL_accept";
	else
		str = "undefined";

	if (where & SSL_CB_LOOP) {
		wpa_printf(MSG_DEBUG, "SSL: %s:%s",
			   str, SSL_state_string_long(ssl));
	} else if (where & SSL_CB_ALERT) {
		struct tls_connection *conn = SSL_get_app_data((SSL *) ssl);
		wpa_printf(MSG_INFO, "SSL: SSL3 alert: %s:%s:%s",
			   where & SSL_CB_READ ?
			   "read (remote end reported an error)" :
			   "write (local SSL3 detected an error)",
			   SSL_alert_type_string_long(ret),
			   SSL_alert_desc_string_long(ret));
		if ((ret >> 8) == SSL3_AL_FATAL) {
			if (where & SSL_CB_READ)
				conn->read_alerts++;
			else
				conn->write_alerts++;
		}
		if (conn->context->event_cb != NULL) {
			union tls_event_data ev;
			struct tls_context *context = conn->context;
			os_memset(&ev, 0, sizeof(ev));
			ev.alert.is_local = !(where & SSL_CB_READ);
			ev.alert.type = SSL_alert_type_string_long(ret);
			ev.alert.description = SSL_alert_desc_string_long(ret);
			context->event_cb(context->cb_ctx, TLS_ALERT, &ev);
		}
	} else if (where & SSL_CB_EXIT && ret <= 0) {
		wpa_printf(MSG_DEBUG, "SSL: %s:%s in %s",
			   str, ret == 0 ? "failed" : "error",
			   SSL_state_string_long(ssl));
	}
}


#ifndef OPENSSL_NO_ENGINE
/**
 * tls_engine_load_dynamic_generic - load any openssl engine
 * @pre: an array of commands and values that load an engine initialized
 *       in the engine specific function
 * @post: an array of commands and values that initialize an already loaded
 *        engine (or %NULL if not required)
 * @id: the engine id of the engine to load (only required if post is not %NULL
 *
 * This function is a generic function that loads any openssl engine.
 *
 * Returns: 0 on success, -1 on failure
 */
static int tls_engine_load_dynamic_generic(const char *pre[],
					   const char *post[], const char *id)
{
	ENGINE *engine;
	const char *dynamic_id = "dynamic";

	engine = ENGINE_by_id(id);
	if (engine) {
		ENGINE_free(engine);
		wpa_printf(MSG_DEBUG, "ENGINE: engine '%s' is already "
			   "available", id);
		return 0;
	}
	ERR_clear_error();

	engine = ENGINE_by_id(dynamic_id);
	if (engine == NULL) {
		wpa_printf(MSG_INFO, "ENGINE: Can't find engine %s [%s]",
			   dynamic_id,
			   ERR_error_string(ERR_get_error(), NULL));
		return -1;
	}

	/* Perform the pre commands. This will load the engine. */
	while (pre && pre[0]) {
		wpa_printf(MSG_DEBUG, "ENGINE: '%s' '%s'", pre[0], pre[1]);
		if (ENGINE_ctrl_cmd_string(engine, pre[0], pre[1], 0) == 0) {
			wpa_printf(MSG_INFO, "ENGINE: ctrl cmd_string failed: "
				   "%s %s [%s]", pre[0], pre[1],
				   ERR_error_string(ERR_get_error(), NULL));
			ENGINE_free(engine);
			return -1;
		}
		pre += 2;
	}

	/*
	 * Free the reference to the "dynamic" engine. The loaded engine can
	 * now be looked up using ENGINE_by_id().
	 */
	ENGINE_free(engine);

	engine = ENGINE_by_id(id);
	if (engine == NULL) {
		wpa_printf(MSG_INFO, "ENGINE: Can't find engine %s [%s]",
			   id, ERR_error_string(ERR_get_error(), NULL));
		return -1;
	}

	while (post && post[0]) {
		wpa_printf(MSG_DEBUG, "ENGINE: '%s' '%s'", post[0], post[1]);
		if (ENGINE_ctrl_cmd_string(engine, post[0], post[1], 0) == 0) {
			wpa_printf(MSG_DEBUG, "ENGINE: ctrl cmd_string failed:"
				" %s %s [%s]", post[0], post[1],
				   ERR_error_string(ERR_get_error(), NULL));
			ENGINE_remove(engine);
			ENGINE_free(engine);
			return -1;
		}
		post += 2;
	}
	ENGINE_free(engine);

	return 0;
}


/**
 * tls_engine_load_dynamic_pkcs11 - load the pkcs11 engine provided by opensc
 * @pkcs11_so_path: pksc11_so_path from the configuration
 * @pcks11_module_path: pkcs11_module_path from the configuration
 */
static int tls_engine_load_dynamic_pkcs11(const char *pkcs11_so_path,
					  const char *pkcs11_module_path)
{
	char *engine_id = "pkcs11";
	const char *pre_cmd[] = {
		"SO_PATH", NULL /* pkcs11_so_path */,
		"ID", NULL /* engine_id */,
		"LIST_ADD", "1",
		/* "NO_VCHECK", "1", */
		"LOAD", NULL,
		NULL, NULL
	};
	const char *post_cmd[] = {
		"MODULE_PATH", NULL /* pkcs11_module_path */,
		NULL, NULL
	};

	if (!pkcs11_so_path)
		return 0;

	pre_cmd[1] = pkcs11_so_path;
	pre_cmd[3] = engine_id;
	if (pkcs11_module_path)
		post_cmd[1] = pkcs11_module_path;
	else
		post_cmd[0] = NULL;

	wpa_printf(MSG_DEBUG, "ENGINE: Loading pkcs11 Engine from %s",
		   pkcs11_so_path);

	return tls_engine_load_dynamic_generic(pre_cmd, post_cmd, engine_id);
}


/**
 * tls_engine_load_dynamic_opensc - load the opensc engine provided by opensc
 * @opensc_so_path: opensc_so_path from the configuration
 */
static int tls_engine_load_dynamic_opensc(const char *opensc_so_path)
{
	char *engine_id = "opensc";
	const char *pre_cmd[] = {
		"SO_PATH", NULL /* opensc_so_path */,
		"ID", NULL /* engine_id */,
		"LIST_ADD", "1",
		"LOAD", NULL,
		NULL, NULL
	};

	if (!opensc_so_path)
		return 0;

	pre_cmd[1] = opensc_so_path;
	pre_cmd[3] = engine_id;

	wpa_printf(MSG_DEBUG, "ENGINE: Loading OpenSC Engine from %s",
		   opensc_so_path);

	return tls_engine_load_dynamic_generic(pre_cmd, NULL, engine_id);
}
#endif /* OPENSSL_NO_ENGINE */


static void remove_session_cb(SSL_CTX *ctx, SSL_SESSION *sess)
{
	struct wpabuf *buf;

	if (tls_ex_idx_session < 0)
		return;
	buf = SSL_SESSION_get_ex_data(sess, tls_ex_idx_session);
	if (!buf)
		return;
	wpa_printf(MSG_DEBUG,
		   "OpenSSL: Free application session data %p (sess %p)",
		   buf, sess);
	wpabuf_free(buf);

	SSL_SESSION_set_ex_data(sess, tls_ex_idx_session, NULL);
}


void * tls_init(const struct tls_config *conf)
{
	struct tls_data *data;
	SSL_CTX *ssl;
	struct tls_context *context;
	const char *ciphers;

	if (tls_openssl_ref_count == 0) {
		tls_global = context = tls_context_new(conf);
		if (context == NULL)
			return NULL;
#ifdef CONFIG_FIPS
#ifdef OPENSSL_FIPS
		if (conf && conf->fips_mode) {
			static int fips_enabled = 0;

			if (!fips_enabled && !FIPS_mode_set(1)) {
				wpa_printf(MSG_ERROR, "Failed to enable FIPS "
					   "mode");
				ERR_load_crypto_strings();
				ERR_print_errors_fp(stderr);
				os_free(tls_global);
				tls_global = NULL;
				return NULL;
			} else {
				wpa_printf(MSG_INFO, "Running in FIPS mode");
				fips_enabled = 1;
			}
		}
#else /* OPENSSL_FIPS */
		if (conf && conf->fips_mode) {
			wpa_printf(MSG_ERROR, "FIPS mode requested, but not "
				   "supported");
			os_free(tls_global);
			tls_global = NULL;
			return NULL;
		}
#endif /* OPENSSL_FIPS */
#endif /* CONFIG_FIPS */
		SSL_load_error_strings();
		SSL_library_init();
#ifndef OPENSSL_NO_SHA256
		EVP_add_digest(EVP_sha256());
#endif /* OPENSSL_NO_SHA256 */
		/* TODO: if /dev/urandom is available, PRNG is seeded
		 * automatically. If this is not the case, random data should
		 * be added here. */

#ifdef PKCS12_FUNCS
#ifndef OPENSSL_NO_RC2
		/*
		 * 40-bit RC2 is commonly used in PKCS#12 files, so enable it.
		 * This is enabled by PKCS12_PBE_add() in OpenSSL 0.9.8
		 * versions, but it looks like OpenSSL 1.0.0 does not do that
		 * anymore.
		 */
		EVP_add_cipher(EVP_rc2_40_cbc());
#endif /* OPENSSL_NO_RC2 */
		PKCS12_PBE_add();
#endif  /* PKCS12_FUNCS */
	} else {
		context = tls_context_new(conf);
		if (context == NULL)
			return NULL;
	}
	tls_openssl_ref_count++;

	data = os_zalloc(sizeof(*data));
	if (data)
		ssl = SSL_CTX_new(SSLv23_method());
	else
		ssl = NULL;
	if (ssl == NULL) {
		tls_openssl_ref_count--;
		if (context != tls_global)
			os_free(context);
		if (tls_openssl_ref_count == 0) {
			os_free(tls_global);
			tls_global = NULL;
		}
		return NULL;
	}
	data->ssl = ssl;
	if (conf)
		data->tls_session_lifetime = conf->tls_session_lifetime;

	SSL_CTX_set_options(ssl, SSL_OP_NO_SSLv2);
	SSL_CTX_set_options(ssl, SSL_OP_NO_SSLv3);

	SSL_CTX_set_info_callback(ssl, ssl_info_cb);
	SSL_CTX_set_app_data(ssl, context);
	if (data->tls_session_lifetime > 0) {
		SSL_CTX_set_quiet_shutdown(ssl, 1);
		/*
		 * Set default context here. In practice, this will be replaced
		 * by the per-EAP method context in tls_connection_set_verify().
		 */
		SSL_CTX_set_session_id_context(ssl, (u8 *) "hostapd", 7);
		SSL_CTX_set_session_cache_mode(ssl, SSL_SESS_CACHE_SERVER);
		SSL_CTX_set_timeout(ssl, data->tls_session_lifetime);
		SSL_CTX_sess_set_remove_cb(ssl, remove_session_cb);
	} else {
		SSL_CTX_set_session_cache_mode(ssl, SSL_SESS_CACHE_OFF);
	}

	if (tls_ex_idx_session < 0) {
		tls_ex_idx_session = SSL_SESSION_get_ex_new_index(
			0, NULL, NULL, NULL, NULL);
		if (tls_ex_idx_session < 0) {
			tls_deinit(data);
			return NULL;
		}
	}

#ifndef OPENSSL_NO_ENGINE
	wpa_printf(MSG_DEBUG, "ENGINE: Loading dynamic engine");
	ERR_load_ENGINE_strings();
	ENGINE_load_dynamic();

	if (conf &&
	    (conf->opensc_engine_path || conf->pkcs11_engine_path ||
	     conf->pkcs11_module_path)) {
		if (tls_engine_load_dynamic_opensc(conf->opensc_engine_path) ||
		    tls_engine_load_dynamic_pkcs11(conf->pkcs11_engine_path,
						   conf->pkcs11_module_path)) {
			tls_deinit(data);
			return NULL;
		}
	}
#endif /* OPENSSL_NO_ENGINE */

	if (conf && conf->openssl_ciphers)
		ciphers = conf->openssl_ciphers;
	else
		ciphers = "DEFAULT:!EXP:!LOW";
	if (SSL_CTX_set_cipher_list(ssl, ciphers) != 1) {
		wpa_printf(MSG_ERROR,
			   "OpenSSL: Failed to set cipher string '%s'",
			   ciphers);
		tls_deinit(data);
		return NULL;
	}

	return data;
}


void tls_deinit(void *ssl_ctx)
{
	struct tls_data *data = ssl_ctx;
	SSL_CTX *ssl = data->ssl;
	struct tls_context *context = SSL_CTX_get_app_data(ssl);
	if (context != tls_global)
		os_free(context);
	if (data->tls_session_lifetime > 0)
		SSL_CTX_flush_sessions(ssl, 0);
	SSL_CTX_free(ssl);

	tls_openssl_ref_count--;
	if (tls_openssl_ref_count == 0) {
#ifndef OPENSSL_NO_ENGINE
		ENGINE_cleanup();
#endif /* OPENSSL_NO_ENGINE */
		CRYPTO_cleanup_all_ex_data();
		ERR_remove_thread_state(NULL);
		ERR_free_strings();
		EVP_cleanup();
		os_free(tls_global->ocsp_stapling_response);
		tls_global->ocsp_stapling_response = NULL;
		os_free(tls_global);
		tls_global = NULL;
	}

	os_free(data);
}


#ifndef OPENSSL_NO_ENGINE

/* Cryptoki return values */
#define CKR_PIN_INCORRECT 0x000000a0
#define CKR_PIN_INVALID 0x000000a1
#define CKR_PIN_LEN_RANGE 0x000000a2

/* libp11 */
#define ERR_LIB_PKCS11	ERR_LIB_USER

static int tls_is_pin_error(unsigned int err)
{
	return ERR_GET_LIB(err) == ERR_LIB_PKCS11 &&
		(ERR_GET_REASON(err) == CKR_PIN_INCORRECT ||
		 ERR_GET_REASON(err) == CKR_PIN_INVALID ||
		 ERR_GET_REASON(err) == CKR_PIN_LEN_RANGE);
}

#endif /* OPENSSL_NO_ENGINE */


#ifdef ANDROID
/* EVP_PKEY_from_keystore comes from system/security/keystore-engine. */
EVP_PKEY * EVP_PKEY_from_keystore(const char *key_id);
#endif /* ANDROID */

static int tls_engine_init(struct tls_connection *conn, const char *engine_id,
			   const char *pin, const char *key_id,
			   const char *cert_id, const char *ca_cert_id)
{
#if defined(ANDROID) && defined(OPENSSL_IS_BORINGSSL)
#if !defined(OPENSSL_NO_ENGINE)
#error "This code depends on OPENSSL_NO_ENGINE being defined by BoringSSL."
#endif
	if (!key_id)
		return TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED;
	conn->engine = NULL;
	conn->private_key = EVP_PKEY_from_keystore(key_id);
	if (!conn->private_key) {
		wpa_printf(MSG_ERROR,
			   "ENGINE: cannot load private key with id '%s' [%s]",
			   key_id,
			   ERR_error_string(ERR_get_error(), NULL));
		return TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED;
	}
#endif /* ANDROID && OPENSSL_IS_BORINGSSL */

#ifndef OPENSSL_NO_ENGINE
	int ret = -1;
	if (engine_id == NULL) {
		wpa_printf(MSG_ERROR, "ENGINE: Engine ID not set");
		return -1;
	}

	ERR_clear_error();
#ifdef ANDROID
	ENGINE_load_dynamic();
#endif
	conn->engine = ENGINE_by_id(engine_id);
	if (!conn->engine) {
		wpa_printf(MSG_ERROR, "ENGINE: engine %s not available [%s]",
			   engine_id, ERR_error_string(ERR_get_error(), NULL));
		goto err;
	}
	if (ENGINE_init(conn->engine) != 1) {
		wpa_printf(MSG_ERROR, "ENGINE: engine init failed "
			   "(engine: %s) [%s]", engine_id,
			   ERR_error_string(ERR_get_error(), NULL));
		goto err;
	}
	wpa_printf(MSG_DEBUG, "ENGINE: engine initialized");

#ifndef ANDROID
	if (pin && ENGINE_ctrl_cmd_string(conn->engine, "PIN", pin, 0) == 0) {
		wpa_printf(MSG_ERROR, "ENGINE: cannot set pin [%s]",
			   ERR_error_string(ERR_get_error(), NULL));
		goto err;
	}
#endif
	if (key_id) {
		/*
		 * Ensure that the ENGINE does not attempt to use the OpenSSL
		 * UI system to obtain a PIN, if we didn't provide one.
		 */
		struct {
			const void *password;
			const char *prompt_info;
		} key_cb = { "", NULL };

		/* load private key first in-case PIN is required for cert */
		conn->private_key = ENGINE_load_private_key(conn->engine,
							    key_id, NULL,
							    &key_cb);
		if (!conn->private_key) {
			unsigned long err = ERR_get_error();

			wpa_printf(MSG_ERROR,
				   "ENGINE: cannot load private key with id '%s' [%s]",
				   key_id,
				   ERR_error_string(err, NULL));
			if (tls_is_pin_error(err))
				ret = TLS_SET_PARAMS_ENGINE_PRV_BAD_PIN;
			else
				ret = TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED;
			goto err;
		}
	}

	/* handle a certificate and/or CA certificate */
	if (cert_id || ca_cert_id) {
		const char *cmd_name = "LOAD_CERT_CTRL";

		/* test if the engine supports a LOAD_CERT_CTRL */
		if (!ENGINE_ctrl(conn->engine, ENGINE_CTRL_GET_CMD_FROM_NAME,
				 0, (void *)cmd_name, NULL)) {
			wpa_printf(MSG_ERROR, "ENGINE: engine does not support"
				   " loading certificates");
			ret = TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED;
			goto err;
		}
	}

	return 0;

err:
	if (conn->engine) {
		ENGINE_free(conn->engine);
		conn->engine = NULL;
	}

	if (conn->private_key) {
		EVP_PKEY_free(conn->private_key);
		conn->private_key = NULL;
	}

	return ret;
#else /* OPENSSL_NO_ENGINE */
	return 0;
#endif /* OPENSSL_NO_ENGINE */
}


static void tls_engine_deinit(struct tls_connection *conn)
{
#if defined(ANDROID) || !defined(OPENSSL_NO_ENGINE)
	wpa_printf(MSG_DEBUG, "ENGINE: engine deinit");
	if (conn->private_key) {
		EVP_PKEY_free(conn->private_key);
		conn->private_key = NULL;
	}
	if (conn->engine) {
#if !defined(OPENSSL_IS_BORINGSSL)
		ENGINE_finish(conn->engine);
#endif /* !OPENSSL_IS_BORINGSSL */
		conn->engine = NULL;
	}
#endif /* ANDROID || !OPENSSL_NO_ENGINE */
}


int tls_get_errors(void *ssl_ctx)
{
	int count = 0;
	unsigned long err;

	while ((err = ERR_get_error())) {
		wpa_printf(MSG_INFO, "TLS - SSL error: %s",
			   ERR_error_string(err, NULL));
		count++;
	}

	return count;
}


static const char * openssl_content_type(int content_type)
{
	switch (content_type) {
	case 20:
		return "change cipher spec";
	case 21:
		return "alert";
	case 22:
		return "handshake";
	case 23:
		return "application data";
	case 24:
		return "heartbeat";
	case 256:
		return "TLS header info"; /* pseudo content type */
	default:
		return "?";
	}
}


static const char * openssl_handshake_type(int content_type, const u8 *buf,
					   size_t len)
{
	if (content_type != 22 || !buf || len == 0)
		return "";
	switch (buf[0]) {
	case 0:
		return "hello request";
	case 1:
		return "client hello";
	case 2:
		return "server hello";
	case 4:
		return "new session ticket";
	case 11:
		return "certificate";
	case 12:
		return "server key exchange";
	case 13:
		return "certificate request";
	case 14:
		return "server hello done";
	case 15:
		return "certificate verify";
	case 16:
		return "client key exchange";
	case 20:
		return "finished";
	case 21:
		return "certificate url";
	case 22:
		return "certificate status";
	default:
		return "?";
	}
}


static void tls_msg_cb(int write_p, int version, int content_type,
		       const void *buf, size_t len, SSL *ssl, void *arg)
{
	struct tls_connection *conn = arg;
	const u8 *pos = buf;

	if (write_p == 2) {
		wpa_printf(MSG_DEBUG,
			   "OpenSSL: session ver=0x%x content_type=%d",
			   version, content_type);
		wpa_hexdump_key(MSG_MSGDUMP, "OpenSSL: Data", buf, len);
		return;
	}

	wpa_printf(MSG_DEBUG, "OpenSSL: %s ver=0x%x content_type=%d (%s/%s)",
		   write_p ? "TX" : "RX", version, content_type,
		   openssl_content_type(content_type),
		   openssl_handshake_type(content_type, buf, len));
	wpa_hexdump_key(MSG_MSGDUMP, "OpenSSL: Message", buf, len);
	if (content_type == 24 && len >= 3 && pos[0] == 1) {
		size_t payload_len = WPA_GET_BE16(pos + 1);
		if (payload_len + 3 > len) {
			wpa_printf(MSG_ERROR, "OpenSSL: Heartbeat attack detected");
			conn->invalid_hb_used = 1;
		}
	}
}


struct tls_connection * tls_connection_init(void *ssl_ctx)
{
	struct tls_data *data = ssl_ctx;
	SSL_CTX *ssl = data->ssl;
	struct tls_connection *conn;
	long options;
	struct tls_context *context = SSL_CTX_get_app_data(ssl);

	conn = os_zalloc(sizeof(*conn));
	if (conn == NULL)
		return NULL;
	conn->ssl_ctx = ssl;
	conn->ssl = SSL_new(ssl);
	if (conn->ssl == NULL) {
		tls_show_errors(MSG_INFO, __func__,
				"Failed to initialize new SSL connection");
		os_free(conn);
		return NULL;
	}

	conn->context = context;
	SSL_set_app_data(conn->ssl, conn);
	SSL_set_msg_callback(conn->ssl, tls_msg_cb);
	SSL_set_msg_callback_arg(conn->ssl, conn);
	options = SSL_OP_NO_SSLv2 | SSL_OP_NO_SSLv3 |
		SSL_OP_SINGLE_DH_USE;
#ifdef SSL_OP_NO_COMPRESSION
	options |= SSL_OP_NO_COMPRESSION;
#endif /* SSL_OP_NO_COMPRESSION */
	SSL_set_options(conn->ssl, options);

	conn->ssl_in = BIO_new(BIO_s_mem());
	if (!conn->ssl_in) {
		tls_show_errors(MSG_INFO, __func__,
				"Failed to create a new BIO for ssl_in");
		SSL_free(conn->ssl);
		os_free(conn);
		return NULL;
	}

	conn->ssl_out = BIO_new(BIO_s_mem());
	if (!conn->ssl_out) {
		tls_show_errors(MSG_INFO, __func__,
				"Failed to create a new BIO for ssl_out");
		SSL_free(conn->ssl);
		BIO_free(conn->ssl_in);
		os_free(conn);
		return NULL;
	}

	SSL_set_bio(conn->ssl, conn->ssl_in, conn->ssl_out);

	return conn;
}


void tls_connection_deinit(void *ssl_ctx, struct tls_connection *conn)
{
	if (conn == NULL)
		return;
	if (conn->success_data) {
		/*
		 * Make sure ssl_clear_bad_session() does not remove this
		 * session.
		 */
		SSL_set_quiet_shutdown(conn->ssl, 1);
		SSL_shutdown(conn->ssl);
	}
	SSL_free(conn->ssl);
	tls_engine_deinit(conn);
	os_free(conn->subject_match);
	os_free(conn->altsubject_match);
	os_free(conn->suffix_match);
	os_free(conn->domain_match);
	os_free(conn->session_ticket);
	os_free(conn);
}


int tls_connection_established(void *ssl_ctx, struct tls_connection *conn)
{
	return conn ? SSL_is_init_finished(conn->ssl) : 0;
}


int tls_connection_shutdown(void *ssl_ctx, struct tls_connection *conn)
{
	if (conn == NULL)
		return -1;

	/* Shutdown previous TLS connection without notifying the peer
	 * because the connection was already terminated in practice
	 * and "close notify" shutdown alert would confuse AS. */
	SSL_set_quiet_shutdown(conn->ssl, 1);
	SSL_shutdown(conn->ssl);
	return SSL_clear(conn->ssl) == 1 ? 0 : -1;
}


static int tls_match_altsubject_component(X509 *cert, int type,
					  const char *value, size_t len)
{
	GENERAL_NAME *gen;
	void *ext;
	int found = 0;
	stack_index_t i;

	ext = X509_get_ext_d2i(cert, NID_subject_alt_name, NULL, NULL);

	for (i = 0; ext && i < sk_GENERAL_NAME_num(ext); i++) {
		gen = sk_GENERAL_NAME_value(ext, i);
		if (gen->type != type)
			continue;
		if (os_strlen((char *) gen->d.ia5->data) == len &&
		    os_memcmp(value, gen->d.ia5->data, len) == 0)
			found++;
	}

	return found;
}


static int tls_match_altsubject(X509 *cert, const char *match)
{
	int type;
	const char *pos, *end;
	size_t len;

	pos = match;
	do {
		if (os_strncmp(pos, "EMAIL:", 6) == 0) {
			type = GEN_EMAIL;
			pos += 6;
		} else if (os_strncmp(pos, "DNS:", 4) == 0) {
			type = GEN_DNS;
			pos += 4;
		} else if (os_strncmp(pos, "URI:", 4) == 0) {
			type = GEN_URI;
			pos += 4;
		} else {
			wpa_printf(MSG_INFO, "TLS: Invalid altSubjectName "
				   "match '%s'", pos);
			return 0;
		}
		end = os_strchr(pos, ';');
		while (end) {
			if (os_strncmp(end + 1, "EMAIL:", 6) == 0 ||
			    os_strncmp(end + 1, "DNS:", 4) == 0 ||
			    os_strncmp(end + 1, "URI:", 4) == 0)
				break;
			end = os_strchr(end + 1, ';');
		}
		if (end)
			len = end - pos;
		else
			len = os_strlen(pos);
		if (tls_match_altsubject_component(cert, type, pos, len) > 0)
			return 1;
		pos = end + 1;
	} while (end);

	return 0;
}


#ifndef CONFIG_NATIVE_WINDOWS
static int domain_suffix_match(const u8 *val, size_t len, const char *match,
			       int full)
{
	size_t i, match_len;

	/* Check for embedded nuls that could mess up suffix matching */
	for (i = 0; i < len; i++) {
		if (val[i] == '\0') {
			wpa_printf(MSG_DEBUG, "TLS: Embedded null in a string - reject");
			return 0;
		}
	}

	match_len = os_strlen(match);
	if (match_len > len || (full && match_len != len))
		return 0;

	if (os_strncasecmp((const char *) val + len - match_len, match,
			   match_len) != 0)
		return 0; /* no match */

	if (match_len == len)
		return 1; /* exact match */

	if (val[len - match_len - 1] == '.')
		return 1; /* full label match completes suffix match */

	wpa_printf(MSG_DEBUG, "TLS: Reject due to incomplete label match");
	return 0;
}
#endif /* CONFIG_NATIVE_WINDOWS */


static int tls_match_suffix(X509 *cert, const char *match, int full)
{
#ifdef CONFIG_NATIVE_WINDOWS
	/* wincrypt.h has conflicting X509_NAME definition */
	return -1;
#else /* CONFIG_NATIVE_WINDOWS */
	GENERAL_NAME *gen;
	void *ext;
	int i;
	stack_index_t j;
	int dns_name = 0;
	X509_NAME *name;

	wpa_printf(MSG_DEBUG, "TLS: Match domain against %s%s",
		   full ? "": "suffix ", match);

	ext = X509_get_ext_d2i(cert, NID_subject_alt_name, NULL, NULL);

	for (j = 0; ext && j < sk_GENERAL_NAME_num(ext); j++) {
		gen = sk_GENERAL_NAME_value(ext, j);
		if (gen->type != GEN_DNS)
			continue;
		dns_name++;
		wpa_hexdump_ascii(MSG_DEBUG, "TLS: Certificate dNSName",
				  gen->d.dNSName->data,
				  gen->d.dNSName->length);
		if (domain_suffix_match(gen->d.dNSName->data,
					gen->d.dNSName->length, match, full) ==
		    1) {
			wpa_printf(MSG_DEBUG, "TLS: %s in dNSName found",
				   full ? "Match" : "Suffix match");
			return 1;
		}
	}

	if (dns_name) {
		wpa_printf(MSG_DEBUG, "TLS: None of the dNSName(s) matched");
		return 0;
	}

	name = X509_get_subject_name(cert);
	i = -1;
	for (;;) {
		X509_NAME_ENTRY *e;
		ASN1_STRING *cn;

		i = X509_NAME_get_index_by_NID(name, NID_commonName, i);
		if (i == -1)
			break;
		e = X509_NAME_get_entry(name, i);
		if (e == NULL)
			continue;
		cn = X509_NAME_ENTRY_get_data(e);
		if (cn == NULL)
			continue;
		wpa_hexdump_ascii(MSG_DEBUG, "TLS: Certificate commonName",
				  cn->data, cn->length);
		if (domain_suffix_match(cn->data, cn->length, match, full) == 1)
		{
			wpa_printf(MSG_DEBUG, "TLS: %s in commonName found",
				   full ? "Match" : "Suffix match");
			return 1;
		}
	}

	wpa_printf(MSG_DEBUG, "TLS: No CommonName %smatch found",
		   full ? "": "suffix ");
	return 0;
#endif /* CONFIG_NATIVE_WINDOWS */
}


static enum tls_fail_reason openssl_tls_fail_reason(int err)
{
	switch (err) {
	case X509_V_ERR_CERT_REVOKED:
		return TLS_FAIL_REVOKED;
	case X509_V_ERR_CERT_NOT_YET_VALID:
	case X509_V_ERR_CRL_NOT_YET_VALID:
		return TLS_FAIL_NOT_YET_VALID;
	case X509_V_ERR_CERT_HAS_EXPIRED:
	case X509_V_ERR_CRL_HAS_EXPIRED:
		return TLS_FAIL_EXPIRED;
	case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
	case X509_V_ERR_UNABLE_TO_GET_CRL:
	case X509_V_ERR_UNABLE_TO_GET_CRL_ISSUER:
	case X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN:
	case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY:
	case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT:
	case X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE:
	case X509_V_ERR_CERT_CHAIN_TOO_LONG:
	case X509_V_ERR_PATH_LENGTH_EXCEEDED:
	case X509_V_ERR_INVALID_CA:
		return TLS_FAIL_UNTRUSTED;
	case X509_V_ERR_UNABLE_TO_DECRYPT_CERT_SIGNATURE:
	case X509_V_ERR_UNABLE_TO_DECRYPT_CRL_SIGNATURE:
	case X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY:
	case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
	case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
	case X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD:
	case X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD:
	case X509_V_ERR_CERT_UNTRUSTED:
	case X509_V_ERR_CERT_REJECTED:
		return TLS_FAIL_BAD_CERTIFICATE;
	default:
		return TLS_FAIL_UNSPECIFIED;
	}
}


static struct wpabuf * get_x509_cert(X509 *cert)
{
	struct wpabuf *buf;
	u8 *tmp;

	int cert_len = i2d_X509(cert, NULL);
	if (cert_len <= 0)
		return NULL;

	buf = wpabuf_alloc(cert_len);
	if (buf == NULL)
		return NULL;

	tmp = wpabuf_put(buf, cert_len);
	i2d_X509(cert, &tmp);
	return buf;
}


static void openssl_tls_fail_event(struct tls_connection *conn,
				   X509 *err_cert, int err, int depth,
				   const char *subject, const char *err_str,
				   enum tls_fail_reason reason)
{
	union tls_event_data ev;
	struct wpabuf *cert = NULL;
	struct tls_context *context = conn->context;

	if (context->event_cb == NULL)
		return;

	cert = get_x509_cert(err_cert);
	os_memset(&ev, 0, sizeof(ev));
	ev.cert_fail.reason = reason != TLS_FAIL_UNSPECIFIED ?
		reason : openssl_tls_fail_reason(err);
	ev.cert_fail.depth = depth;
	ev.cert_fail.subject = subject;
	ev.cert_fail.reason_txt = err_str;
	ev.cert_fail.cert = cert;
	context->event_cb(context->cb_ctx, TLS_CERT_CHAIN_FAILURE, &ev);
	wpabuf_free(cert);
}


static void openssl_tls_cert_event(struct tls_connection *conn,
				   X509 *err_cert, int depth,
				   const char *subject)
{
	struct wpabuf *cert = NULL;
	union tls_event_data ev;
	struct tls_context *context = conn->context;
	char *altsubject[TLS_MAX_ALT_SUBJECT];
	int alt, num_altsubject = 0;
	GENERAL_NAME *gen;
	void *ext;
	stack_index_t i;
#ifdef CONFIG_SHA256
	u8 hash[32];
#endif /* CONFIG_SHA256 */

	if (context->event_cb == NULL)
		return;

	os_memset(&ev, 0, sizeof(ev));
	if (conn->cert_probe || (conn->flags & TLS_CONN_EXT_CERT_CHECK) ||
	    context->cert_in_cb) {
		cert = get_x509_cert(err_cert);
		ev.peer_cert.cert = cert;
	}
#ifdef CONFIG_SHA256
	if (cert) {
		const u8 *addr[1];
		size_t len[1];
		addr[0] = wpabuf_head(cert);
		len[0] = wpabuf_len(cert);
		if (sha256_vector(1, addr, len, hash) == 0) {
			ev.peer_cert.hash = hash;
			ev.peer_cert.hash_len = sizeof(hash);
		}
	}
#endif /* CONFIG_SHA256 */
	ev.peer_cert.depth = depth;
	ev.peer_cert.subject = subject;

	ext = X509_get_ext_d2i(err_cert, NID_subject_alt_name, NULL, NULL);
	for (i = 0; ext && i < sk_GENERAL_NAME_num(ext); i++) {
		char *pos;

		if (num_altsubject == TLS_MAX_ALT_SUBJECT)
			break;
		gen = sk_GENERAL_NAME_value(ext, i);
		if (gen->type != GEN_EMAIL &&
		    gen->type != GEN_DNS &&
		    gen->type != GEN_URI)
			continue;

		pos = os_malloc(10 + gen->d.ia5->length + 1);
		if (pos == NULL)
			break;
		altsubject[num_altsubject++] = pos;

		switch (gen->type) {
		case GEN_EMAIL:
			os_memcpy(pos, "EMAIL:", 6);
			pos += 6;
			break;
		case GEN_DNS:
			os_memcpy(pos, "DNS:", 4);
			pos += 4;
			break;
		case GEN_URI:
			os_memcpy(pos, "URI:", 4);
			pos += 4;
			break;
		}

		os_memcpy(pos, gen->d.ia5->data, gen->d.ia5->length);
		pos += gen->d.ia5->length;
		*pos = '\0';
	}

	for (alt = 0; alt < num_altsubject; alt++)
		ev.peer_cert.altsubject[alt] = altsubject[alt];
	ev.peer_cert.num_altsubject = num_altsubject;

	context->event_cb(context->cb_ctx, TLS_PEER_CERTIFICATE, &ev);
	wpabuf_free(cert);
	for (alt = 0; alt < num_altsubject; alt++)
		os_free(altsubject[alt]);
}


static int tls_verify_cb(int preverify_ok, X509_STORE_CTX *x509_ctx)
{
	char buf[256];
	X509 *err_cert;
	int err, depth;
	SSL *ssl;
	struct tls_connection *conn;
	struct tls_context *context;
	char *match, *altmatch, *suffix_match, *domain_match;
	const char *err_str;

	err_cert = X509_STORE_CTX_get_current_cert(x509_ctx);
	if (!err_cert)
		return 0;

	err = X509_STORE_CTX_get_error(x509_ctx);
	depth = X509_STORE_CTX_get_error_depth(x509_ctx);
	ssl = X509_STORE_CTX_get_ex_data(x509_ctx,
					 SSL_get_ex_data_X509_STORE_CTX_idx());
	X509_NAME_oneline(X509_get_subject_name(err_cert), buf, sizeof(buf));

	conn = SSL_get_app_data(ssl);
	if (conn == NULL)
		return 0;

	if (depth == 0)
		conn->peer_cert = err_cert;
	else if (depth == 1)
		conn->peer_issuer = err_cert;
	else if (depth == 2)
		conn->peer_issuer_issuer = err_cert;

	context = conn->context;
	match = conn->subject_match;
	altmatch = conn->altsubject_match;
	suffix_match = conn->suffix_match;
	domain_match = conn->domain_match;

	if (!preverify_ok && !conn->ca_cert_verify)
		preverify_ok = 1;
	if (!preverify_ok && depth > 0 && conn->server_cert_only)
		preverify_ok = 1;
	if (!preverify_ok && (conn->flags & TLS_CONN_DISABLE_TIME_CHECKS) &&
	    (err == X509_V_ERR_CERT_HAS_EXPIRED ||
	     err == X509_V_ERR_CERT_NOT_YET_VALID)) {
		wpa_printf(MSG_DEBUG, "OpenSSL: Ignore certificate validity "
			   "time mismatch");
		preverify_ok = 1;
	}

	err_str = X509_verify_cert_error_string(err);

#ifdef CONFIG_SHA256
	/*
	 * Do not require preverify_ok so we can explicity allow otherwise
	 * invalid pinned server certificates.
	 */
	if (depth == 0 && conn->server_cert_only) {
		struct wpabuf *cert;
		cert = get_x509_cert(err_cert);
		if (!cert) {
			wpa_printf(MSG_DEBUG, "OpenSSL: Could not fetch "
				   "server certificate data");
			preverify_ok = 0;
		} else {
			u8 hash[32];
			const u8 *addr[1];
			size_t len[1];
			addr[0] = wpabuf_head(cert);
			len[0] = wpabuf_len(cert);
			if (sha256_vector(1, addr, len, hash) < 0 ||
			    os_memcmp(conn->srv_cert_hash, hash, 32) != 0) {
				err_str = "Server certificate mismatch";
				err = X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN;
				preverify_ok = 0;
			} else if (!preverify_ok) {
				/*
				 * Certificate matches pinned certificate, allow
				 * regardless of other problems.
				 */
				wpa_printf(MSG_DEBUG,
					   "OpenSSL: Ignore validation issues for a pinned server certificate");
				preverify_ok = 1;
			}
			wpabuf_free(cert);
		}
	}
#endif /* CONFIG_SHA256 */

	if (!preverify_ok) {
		wpa_printf(MSG_WARNING, "TLS: Certificate verification failed,"
			   " error %d (%s) depth %d for '%s'", err, err_str,
			   depth, buf);
		openssl_tls_fail_event(conn, err_cert, err, depth, buf,
				       err_str, TLS_FAIL_UNSPECIFIED);
		return preverify_ok;
	}

	wpa_printf(MSG_DEBUG, "TLS: tls_verify_cb - preverify_ok=%d "
		   "err=%d (%s) ca_cert_verify=%d depth=%d buf='%s'",
		   preverify_ok, err, err_str,
		   conn->ca_cert_verify, depth, buf);
	if (depth == 0 && match && os_strstr(buf, match) == NULL) {
		wpa_printf(MSG_WARNING, "TLS: Subject '%s' did not "
			   "match with '%s'", buf, match);
		preverify_ok = 0;
		openssl_tls_fail_event(conn, err_cert, err, depth, buf,
				       "Subject mismatch",
				       TLS_FAIL_SUBJECT_MISMATCH);
	} else if (depth == 0 && altmatch &&
		   !tls_match_altsubject(err_cert, altmatch)) {
		wpa_printf(MSG_WARNING, "TLS: altSubjectName match "
			   "'%s' not found", altmatch);
		preverify_ok = 0;
		openssl_tls_fail_event(conn, err_cert, err, depth, buf,
				       "AltSubject mismatch",
				       TLS_FAIL_ALTSUBJECT_MISMATCH);
	} else if (depth == 0 && suffix_match &&
		   !tls_match_suffix(err_cert, suffix_match, 0)) {
		wpa_printf(MSG_WARNING, "TLS: Domain suffix match '%s' not found",
			   suffix_match);
		preverify_ok = 0;
		openssl_tls_fail_event(conn, err_cert, err, depth, buf,
				       "Domain suffix mismatch",
				       TLS_FAIL_DOMAIN_SUFFIX_MISMATCH);
	} else if (depth == 0 && domain_match &&
		   !tls_match_suffix(err_cert, domain_match, 1)) {
		wpa_printf(MSG_WARNING, "TLS: Domain match '%s' not found",
			   domain_match);
		preverify_ok = 0;
		openssl_tls_fail_event(conn, err_cert, err, depth, buf,
				       "Domain mismatch",
				       TLS_FAIL_DOMAIN_MISMATCH);
	} else
		openssl_tls_cert_event(conn, err_cert, depth, buf);

	if (conn->cert_probe && preverify_ok && depth == 0) {
		wpa_printf(MSG_DEBUG, "OpenSSL: Reject server certificate "
			   "on probe-only run");
		preverify_ok = 0;
		openssl_tls_fail_event(conn, err_cert, err, depth, buf,
				       "Server certificate chain probe",
				       TLS_FAIL_SERVER_CHAIN_PROBE);
	}

#ifdef OPENSSL_IS_BORINGSSL
	if (depth == 0 && (conn->flags & TLS_CONN_REQUEST_OCSP) &&
	    preverify_ok) {
		enum ocsp_result res;

		res = check_ocsp_resp(conn->ssl_ctx, conn->ssl, err_cert,
				      conn->peer_issuer,
				      conn->peer_issuer_issuer);
		if (res == OCSP_REVOKED) {
			preverify_ok = 0;
			openssl_tls_fail_event(conn, err_cert, err, depth, buf,
					       "certificate revoked",
					       TLS_FAIL_REVOKED);
			if (err == X509_V_OK)
				X509_STORE_CTX_set_error(
					x509_ctx, X509_V_ERR_CERT_REVOKED);
		} else if (res != OCSP_GOOD &&
			   (conn->flags & TLS_CONN_REQUIRE_OCSP)) {
			preverify_ok = 0;
			openssl_tls_fail_event(conn, err_cert, err, depth, buf,
					       "bad certificate status response",
					       TLS_FAIL_UNSPECIFIED);
		}
	}
#endif /* OPENSSL_IS_BORINGSSL */

	if (depth == 0 && preverify_ok && context->event_cb != NULL)
		context->event_cb(context->cb_ctx,
				  TLS_CERT_CHAIN_SUCCESS, NULL);

	return preverify_ok;
}


#ifndef OPENSSL_NO_STDIO
static int tls_load_ca_der(struct tls_data *data, const char *ca_cert)
{
	SSL_CTX *ssl_ctx = data->ssl;
	X509_LOOKUP *lookup;
	int ret = 0;

	lookup = X509_STORE_add_lookup(SSL_CTX_get_cert_store(ssl_ctx),
				       X509_LOOKUP_file());
	if (lookup == NULL) {
		tls_show_errors(MSG_WARNING, __func__,
				"Failed add lookup for X509 store");
		return -1;
	}

	if (!X509_LOOKUP_load_file(lookup, ca_cert, X509_FILETYPE_ASN1)) {
		unsigned long err = ERR_peek_error();
		tls_show_errors(MSG_WARNING, __func__,
				"Failed load CA in DER format");
		if (ERR_GET_LIB(err) == ERR_LIB_X509 &&
		    ERR_GET_REASON(err) == X509_R_CERT_ALREADY_IN_HASH_TABLE) {
			wpa_printf(MSG_DEBUG, "OpenSSL: %s - ignoring "
				   "cert already in hash table error",
				   __func__);
		} else
			ret = -1;
	}

	return ret;
}
#endif /* OPENSSL_NO_STDIO */


static int tls_connection_ca_cert(struct tls_data *data,
				  struct tls_connection *conn,
				  const char *ca_cert, const u8 *ca_cert_blob,
				  size_t ca_cert_blob_len, const char *ca_path)
{
	SSL_CTX *ssl_ctx = data->ssl;
	X509_STORE *store;

	/*
	 * Remove previously configured trusted CA certificates before adding
	 * new ones.
	 */
	store = X509_STORE_new();
	if (store == NULL) {
		wpa_printf(MSG_DEBUG, "OpenSSL: %s - failed to allocate new "
			   "certificate store", __func__);
		return -1;
	}
	SSL_CTX_set_cert_store(ssl_ctx, store);

	SSL_set_verify(conn->ssl, SSL_VERIFY_PEER, tls_verify_cb);
	conn->ca_cert_verify = 1;

	if (ca_cert && os_strncmp(ca_cert, "probe://", 8) == 0) {
		wpa_printf(MSG_DEBUG, "OpenSSL: Probe for server certificate "
			   "chain");
		conn->cert_probe = 1;
		conn->ca_cert_verify = 0;
		return 0;
	}

	if (ca_cert && os_strncmp(ca_cert, "hash://", 7) == 0) {
#ifdef CONFIG_SHA256
		const char *pos = ca_cert + 7;
		if (os_strncmp(pos, "server/sha256/", 14) != 0) {
			wpa_printf(MSG_DEBUG, "OpenSSL: Unsupported ca_cert "
				   "hash value '%s'", ca_cert);
			return -1;
		}
		pos += 14;
		if (os_strlen(pos) != 32 * 2) {
			wpa_printf(MSG_DEBUG, "OpenSSL: Unexpected SHA256 "
				   "hash length in ca_cert '%s'", ca_cert);
			return -1;
		}
		if (hexstr2bin(pos, conn->srv_cert_hash, 32) < 0) {
			wpa_printf(MSG_DEBUG, "OpenSSL: Invalid SHA256 hash "
				   "value in ca_cert '%s'", ca_cert);
			return -1;
		}
		conn->server_cert_only = 1;
		wpa_printf(MSG_DEBUG, "OpenSSL: Checking only server "
			   "certificate match");
		return 0;
#else /* CONFIG_SHA256 */
		wpa_printf(MSG_INFO, "No SHA256 included in the build - "
			   "cannot validate server certificate hash");
		return -1;
#endif /* CONFIG_SHA256 */
	}

	if (ca_cert_blob) {
		X509 *cert = d2i_X509(NULL,
				      (const unsigned char **) &ca_cert_blob,
				      ca_cert_blob_len);
		if (cert == NULL) {
			tls_show_errors(MSG_WARNING, __func__,
					"Failed to parse ca_cert_blob");
			return -1;
		}

		if (!X509_STORE_add_cert(SSL_CTX_get_cert_store(ssl_ctx),
					 cert)) {
			unsigned long err = ERR_peek_error();
			tls_show_errors(MSG_WARNING, __func__,
					"Failed to add ca_cert_blob to "
					"certificate store");
			if (ERR_GET_LIB(err) == ERR_LIB_X509 &&
			    ERR_GET_REASON(err) ==
			    X509_R_CERT_ALREADY_IN_HASH_TABLE) {
				wpa_printf(MSG_DEBUG, "OpenSSL: %s - ignoring "
					   "cert already in hash table error",
					   __func__);
			} else {
				X509_free(cert);
				return -1;
			}
		}
		X509_free(cert);
		wpa_printf(MSG_DEBUG, "OpenSSL: %s - added ca_cert_blob "
			   "to certificate store", __func__);
		return 0;
	}

#ifdef ANDROID
	/* Single alias */
	if (ca_cert && os_strncmp("keystore://", ca_cert, 11) == 0) {
		if (tls_add_ca_from_keystore(ssl_ctx->cert_store,
					     &ca_cert[11]) < 0)
			return -1;
		SSL_set_verify(conn->ssl, SSL_VERIFY_PEER, tls_verify_cb);
		return 0;
	}

	/* Multiple aliases separated by space */
	if (ca_cert && os_strncmp("keystores://", ca_cert, 12) == 0) {
		char *aliases = os_strdup(&ca_cert[12]);
		const char *delim = " ";
		int rc = 0;
		char *savedptr;
		char *alias;

		if (!aliases)
			return -1;
		alias = strtok_r(aliases, delim, &savedptr);
		for (; alias; alias = strtok_r(NULL, delim, &savedptr)) {
			if (tls_add_ca_from_keystore_encoded(
				    ssl_ctx->cert_store, alias)) {
				wpa_printf(MSG_WARNING,
					   "OpenSSL: %s - Failed to add ca_cert %s from keystore",
					   __func__, alias);
				rc = -1;
				break;
			}
		}
		os_free(aliases);
		if (rc)
			return rc;

		SSL_set_verify(conn->ssl, SSL_VERIFY_PEER, tls_verify_cb);
		return 0;
	}
#endif /* ANDROID */

#ifdef CONFIG_NATIVE_WINDOWS
	if (ca_cert && tls_cryptoapi_ca_cert(ssl_ctx, conn->ssl, ca_cert) ==
	    0) {
		wpa_printf(MSG_DEBUG, "OpenSSL: Added CA certificates from "
			   "system certificate store");
		return 0;
	}
#endif /* CONFIG_NATIVE_WINDOWS */

	if (ca_cert || ca_path) {
#ifndef OPENSSL_NO_STDIO
		if (SSL_CTX_load_verify_locations(ssl_ctx, ca_cert, ca_path) !=
		    1) {
			tls_show_errors(MSG_WARNING, __func__,
					"Failed to load root certificates");
			if (ca_cert &&
			    tls_load_ca_der(data, ca_cert) == 0) {
				wpa_printf(MSG_DEBUG, "OpenSSL: %s - loaded "
					   "DER format CA certificate",
					   __func__);
			} else
				return -1;
		} else {
			wpa_printf(MSG_DEBUG, "TLS: Trusted root "
				   "certificate(s) loaded");
			tls_get_errors(data);
		}
#else /* OPENSSL_NO_STDIO */
		wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO",
			   __func__);
		return -1;
#endif /* OPENSSL_NO_STDIO */
	} else {
		/* No ca_cert configured - do not try to verify server
		 * certificate */
		conn->ca_cert_verify = 0;
	}

	return 0;
}


static int tls_global_ca_cert(struct tls_data *data, const char *ca_cert)
{
	SSL_CTX *ssl_ctx = data->ssl;

	if (ca_cert) {
		if (SSL_CTX_load_verify_locations(ssl_ctx, ca_cert, NULL) != 1)
		{
			tls_show_errors(MSG_WARNING, __func__,
					"Failed to load root certificates");
			return -1;
		}

		wpa_printf(MSG_DEBUG, "TLS: Trusted root "
			   "certificate(s) loaded");

#ifndef OPENSSL_NO_STDIO
		/* Add the same CAs to the client certificate requests */
		SSL_CTX_set_client_CA_list(ssl_ctx,
					   SSL_load_client_CA_file(ca_cert));
#endif /* OPENSSL_NO_STDIO */
	}

	return 0;
}


int tls_global_set_verify(void *ssl_ctx, int check_crl)
{
	int flags;

	if (check_crl) {
		struct tls_data *data = ssl_ctx;
		X509_STORE *cs = SSL_CTX_get_cert_store(data->ssl);
		if (cs == NULL) {
			tls_show_errors(MSG_INFO, __func__, "Failed to get "
					"certificate store when enabling "
					"check_crl");
			return -1;
		}
		flags = X509_V_FLAG_CRL_CHECK;
		if (check_crl == 2)
			flags |= X509_V_FLAG_CRL_CHECK_ALL;
		X509_STORE_set_flags(cs, flags);
	}
	return 0;
}


static int tls_connection_set_subject_match(struct tls_connection *conn,
					    const char *subject_match,
					    const char *altsubject_match,
					    const char *suffix_match,
					    const char *domain_match)
{
	os_free(conn->subject_match);
	conn->subject_match = NULL;
	if (subject_match) {
		conn->subject_match = os_strdup(subject_match);
		if (conn->subject_match == NULL)
			return -1;
	}

	os_free(conn->altsubject_match);
	conn->altsubject_match = NULL;
	if (altsubject_match) {
		conn->altsubject_match = os_strdup(altsubject_match);
		if (conn->altsubject_match == NULL)
			return -1;
	}

	os_free(conn->suffix_match);
	conn->suffix_match = NULL;
	if (suffix_match) {
		conn->suffix_match = os_strdup(suffix_match);
		if (conn->suffix_match == NULL)
			return -1;
	}

	os_free(conn->domain_match);
	conn->domain_match = NULL;
	if (domain_match) {
		conn->domain_match = os_strdup(domain_match);
		if (conn->domain_match == NULL)
			return -1;
	}

	return 0;
}


static void tls_set_conn_flags(SSL *ssl, unsigned int flags)
{
#ifdef SSL_OP_NO_TICKET
	if (flags & TLS_CONN_DISABLE_SESSION_TICKET)
		SSL_set_options(ssl, SSL_OP_NO_TICKET);
#ifdef SSL_clear_options
	else
		SSL_clear_options(ssl, SSL_OP_NO_TICKET);
#endif /* SSL_clear_options */
#endif /* SSL_OP_NO_TICKET */

#ifdef SSL_OP_NO_TLSv1
	if (flags & TLS_CONN_DISABLE_TLSv1_0)
		SSL_set_options(ssl, SSL_OP_NO_TLSv1);
	else
		SSL_clear_options(ssl, SSL_OP_NO_TLSv1);
#endif /* SSL_OP_NO_TLSv1 */
#ifdef SSL_OP_NO_TLSv1_1
	if (flags & TLS_CONN_DISABLE_TLSv1_1)
		SSL_set_options(ssl, SSL_OP_NO_TLSv1_1);
	else
		SSL_clear_options(ssl, SSL_OP_NO_TLSv1_1);
#endif /* SSL_OP_NO_TLSv1_1 */
#ifdef SSL_OP_NO_TLSv1_2
	if (flags & TLS_CONN_DISABLE_TLSv1_2)
		SSL_set_options(ssl, SSL_OP_NO_TLSv1_2);
	else
		SSL_clear_options(ssl, SSL_OP_NO_TLSv1_2);
#endif /* SSL_OP_NO_TLSv1_2 */
}


int tls_connection_set_verify(void *ssl_ctx, struct tls_connection *conn,
			      int verify_peer, unsigned int flags,
			      const u8 *session_ctx, size_t session_ctx_len)
{
	static int counter = 0;
	struct tls_data *data = ssl_ctx;

	if (conn == NULL)
		return -1;

	if (verify_peer) {
		conn->ca_cert_verify = 1;
		SSL_set_verify(conn->ssl, SSL_VERIFY_PEER |
			       SSL_VERIFY_FAIL_IF_NO_PEER_CERT |
			       SSL_VERIFY_CLIENT_ONCE, tls_verify_cb);
	} else {
		conn->ca_cert_verify = 0;
		SSL_set_verify(conn->ssl, SSL_VERIFY_NONE, NULL);
	}

	tls_set_conn_flags(conn->ssl, flags);
	conn->flags = flags;

	SSL_set_accept_state(conn->ssl);

	if (data->tls_session_lifetime == 0) {
		/*
		 * Set session id context to a unique value to make sure
		 * session resumption cannot be used either through session
		 * caching or TLS ticket extension.
		 */
		counter++;
		SSL_set_session_id_context(conn->ssl,
					   (const unsigned char *) &counter,
					   sizeof(counter));
	} else if (session_ctx) {
		SSL_set_session_id_context(conn->ssl, session_ctx,
					   session_ctx_len);
	}

	return 0;
}


static int tls_connection_client_cert(struct tls_connection *conn,
				      const char *client_cert,
				      const u8 *client_cert_blob,
				      size_t client_cert_blob_len)
{
	if (client_cert == NULL && client_cert_blob == NULL)
		return 0;

#ifdef PKCS12_FUNCS
#if OPENSSL_VERSION_NUMBER < 0x10002000L
	/*
	 * Clear previously set extra chain certificates, if any, from PKCS#12
	 * processing in tls_parse_pkcs12() to allow OpenSSL to build a new
	 * chain properly.
	 */
	SSL_CTX_clear_extra_chain_certs(conn->ssl_ctx);
#endif /* OPENSSL_VERSION_NUMBER < 0x10002000L */
#endif /* PKCS12_FUNCS */

	if (client_cert_blob &&
	    SSL_use_certificate_ASN1(conn->ssl, (u8 *) client_cert_blob,
				     client_cert_blob_len) == 1) {
		wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_certificate_ASN1 --> "
			   "OK");
		return 0;
	} else if (client_cert_blob) {
		tls_show_errors(MSG_DEBUG, __func__,
				"SSL_use_certificate_ASN1 failed");
	}

	if (client_cert == NULL)
		return -1;

#ifdef ANDROID
	if (os_strncmp("keystore://", client_cert, 11) == 0) {
		BIO *bio = BIO_from_keystore(&client_cert[11]);
		X509 *x509 = NULL;
		int ret = -1;
		if (bio) {
			x509 = PEM_read_bio_X509(bio, NULL, NULL, NULL);
			BIO_free(bio);
		}
		if (x509) {
			if (SSL_use_certificate(conn->ssl, x509) == 1)
				ret = 0;
			X509_free(x509);
		}
		return ret;
	}
#endif /* ANDROID */

#ifndef OPENSSL_NO_STDIO
	if (SSL_use_certificate_file(conn->ssl, client_cert,
				     SSL_FILETYPE_ASN1) == 1) {
		wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_certificate_file (DER)"
			   " --> OK");
		return 0;
	}

	if (SSL_use_certificate_file(conn->ssl, client_cert,
				     SSL_FILETYPE_PEM) == 1) {
		ERR_clear_error();
		wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_certificate_file (PEM)"
			   " --> OK");
		return 0;
	}

	tls_show_errors(MSG_DEBUG, __func__,
			"SSL_use_certificate_file failed");
#else /* OPENSSL_NO_STDIO */
	wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO", __func__);
#endif /* OPENSSL_NO_STDIO */

	return -1;
}


static int tls_global_client_cert(struct tls_data *data,
				  const char *client_cert)
{
#ifndef OPENSSL_NO_STDIO
	SSL_CTX *ssl_ctx = data->ssl;

	if (client_cert == NULL)
		return 0;

	if (SSL_CTX_use_certificate_file(ssl_ctx, client_cert,
					 SSL_FILETYPE_ASN1) != 1 &&
	    SSL_CTX_use_certificate_chain_file(ssl_ctx, client_cert) != 1 &&
	    SSL_CTX_use_certificate_file(ssl_ctx, client_cert,
					 SSL_FILETYPE_PEM) != 1) {
		tls_show_errors(MSG_INFO, __func__,
				"Failed to load client certificate");
		return -1;
	}
	return 0;
#else /* OPENSSL_NO_STDIO */
	if (client_cert == NULL)
		return 0;
	wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO", __func__);
	return -1;
#endif /* OPENSSL_NO_STDIO */
}


static int tls_passwd_cb(char *buf, int size, int rwflag, void *password)
{
	if (password == NULL) {
		return 0;
	}
	os_strlcpy(buf, (char *) password, size);
	return os_strlen(buf);
}


#ifdef PKCS12_FUNCS
static int tls_parse_pkcs12(struct tls_data *data, SSL *ssl, PKCS12 *p12,
			    const char *passwd)
{
	EVP_PKEY *pkey;
	X509 *cert;
	STACK_OF(X509) *certs;
	int res = 0;
	char buf[256];

	pkey = NULL;
	cert = NULL;
	certs = NULL;
	if (!passwd)
		passwd = "";
	if (!PKCS12_parse(p12, passwd, &pkey, &cert, &certs)) {
		tls_show_errors(MSG_DEBUG, __func__,
				"Failed to parse PKCS12 file");
		PKCS12_free(p12);
		return -1;
	}
	wpa_printf(MSG_DEBUG, "TLS: Successfully parsed PKCS12 data");

	if (cert) {
		X509_NAME_oneline(X509_get_subject_name(cert), buf,
				  sizeof(buf));
		wpa_printf(MSG_DEBUG, "TLS: Got certificate from PKCS12: "
			   "subject='%s'", buf);
		if (ssl) {
			if (SSL_use_certificate(ssl, cert) != 1)
				res = -1;
		} else {
			if (SSL_CTX_use_certificate(data->ssl, cert) != 1)
				res = -1;
		}
		X509_free(cert);
	}

	if (pkey) {
		wpa_printf(MSG_DEBUG, "TLS: Got private key from PKCS12");
		if (ssl) {
			if (SSL_use_PrivateKey(ssl, pkey) != 1)
				res = -1;
		} else {
			if (SSL_CTX_use_PrivateKey(data->ssl, pkey) != 1)
				res = -1;
		}
		EVP_PKEY_free(pkey);
	}

	if (certs) {
#if OPENSSL_VERSION_NUMBER >= 0x10002000L && !defined(LIBRESSL_VERSION_NUMBER)
		SSL_clear_chain_certs(ssl);
		while ((cert = sk_X509_pop(certs)) != NULL) {
			X509_NAME_oneline(X509_get_subject_name(cert), buf,
					  sizeof(buf));
			wpa_printf(MSG_DEBUG, "TLS: additional certificate"
				   " from PKCS12: subject='%s'", buf);
			if (SSL_add1_chain_cert(ssl, cert) != 1) {
				tls_show_errors(MSG_DEBUG, __func__,
						"Failed to add additional certificate");
				res = -1;
				break;
			}
		}
		if (!res) {
			/* Try to continue anyway */
		}
		sk_X509_free(certs);
#ifndef OPENSSL_IS_BORINGSSL
		res = SSL_build_cert_chain(ssl,
					   SSL_BUILD_CHAIN_FLAG_CHECK |
					   SSL_BUILD_CHAIN_FLAG_IGNORE_ERROR);
		if (!res) {
			tls_show_errors(MSG_DEBUG, __func__,
					"Failed to build certificate chain");
		} else if (res == 2) {
			wpa_printf(MSG_DEBUG,
				   "TLS: Ignore certificate chain verification error when building chain with PKCS#12 extra certificates");
		}
#endif /* OPENSSL_IS_BORINGSSL */
		/*
		 * Try to continue regardless of result since it is possible for
		 * the extra certificates not to be required.
		 */
		res = 0;
#else /* OPENSSL_VERSION_NUMBER >= 0x10002000L */
		SSL_CTX_clear_extra_chain_certs(data->ssl);
		while ((cert = sk_X509_pop(certs)) != NULL) {
			X509_NAME_oneline(X509_get_subject_name(cert), buf,
					  sizeof(buf));
			wpa_printf(MSG_DEBUG, "TLS: additional certificate"
				   " from PKCS12: subject='%s'", buf);
			/*
			 * There is no SSL equivalent for the chain cert - so
			 * always add it to the context...
			 */
			if (SSL_CTX_add_extra_chain_cert(data->ssl, cert) != 1)
			{
				res = -1;
				break;
			}
		}
		sk_X509_free(certs);
#endif /* OPENSSL_VERSION_NUMBER >= 0x10002000L */
	}

	PKCS12_free(p12);

	if (res < 0)
		tls_get_errors(data);

	return res;
}
#endif  /* PKCS12_FUNCS */


static int tls_read_pkcs12(struct tls_data *data, SSL *ssl,
			   const char *private_key, const char *passwd)
{
#ifdef PKCS12_FUNCS
	FILE *f;
	PKCS12 *p12;

	f = fopen(private_key, "rb");
	if (f == NULL)
		return -1;

	p12 = d2i_PKCS12_fp(f, NULL);
	fclose(f);

	if (p12 == NULL) {
		tls_show_errors(MSG_INFO, __func__,
				"Failed to use PKCS#12 file");
		return -1;
	}

	return tls_parse_pkcs12(data, ssl, p12, passwd);

#else /* PKCS12_FUNCS */
	wpa_printf(MSG_INFO, "TLS: PKCS12 support disabled - cannot read "
		   "p12/pfx files");
	return -1;
#endif  /* PKCS12_FUNCS */
}


static int tls_read_pkcs12_blob(struct tls_data *data, SSL *ssl,
				const u8 *blob, size_t len, const char *passwd)
{
#ifdef PKCS12_FUNCS
	PKCS12 *p12;

	p12 = d2i_PKCS12(NULL, (const unsigned char **) &blob, len);
	if (p12 == NULL) {
		tls_show_errors(MSG_INFO, __func__,
				"Failed to use PKCS#12 blob");
		return -1;
	}

	return tls_parse_pkcs12(data, ssl, p12, passwd);

#else /* PKCS12_FUNCS */
	wpa_printf(MSG_INFO, "TLS: PKCS12 support disabled - cannot parse "
		   "p12/pfx blobs");
	return -1;
#endif  /* PKCS12_FUNCS */
}


#ifndef OPENSSL_NO_ENGINE
static int tls_engine_get_cert(struct tls_connection *conn,
			       const char *cert_id,
			       X509 **cert)
{
	/* this runs after the private key is loaded so no PIN is required */
	struct {
		const char *cert_id;
		X509 *cert;
	} params;
	params.cert_id = cert_id;
	params.cert = NULL;

	if (!ENGINE_ctrl_cmd(conn->engine, "LOAD_CERT_CTRL",
			     0, &params, NULL, 1)) {
		unsigned long err = ERR_get_error();

		wpa_printf(MSG_ERROR, "ENGINE: cannot load client cert with id"
			   " '%s' [%s]", cert_id,
			   ERR_error_string(err, NULL));
		if (tls_is_pin_error(err))
			return TLS_SET_PARAMS_ENGINE_PRV_BAD_PIN;
		return TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED;
	}
	if (!params.cert) {
		wpa_printf(MSG_ERROR, "ENGINE: did not properly cert with id"
			   " '%s'", cert_id);
		return TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED;
	}
	*cert = params.cert;
	return 0;
}
#endif /* OPENSSL_NO_ENGINE */


static int tls_connection_engine_client_cert(struct tls_connection *conn,
					     const char *cert_id)
{
#ifndef OPENSSL_NO_ENGINE
	X509 *cert;

	if (tls_engine_get_cert(conn, cert_id, &cert))
		return -1;

	if (!SSL_use_certificate(conn->ssl, cert)) {
		tls_show_errors(MSG_ERROR, __func__,
				"SSL_use_certificate failed");
                X509_free(cert);
		return -1;
	}
	X509_free(cert);
	wpa_printf(MSG_DEBUG, "ENGINE: SSL_use_certificate --> "
		   "OK");
	return 0;

#else /* OPENSSL_NO_ENGINE */
	return -1;
#endif /* OPENSSL_NO_ENGINE */
}


static int tls_connection_engine_ca_cert(struct tls_data *data,
					 struct tls_connection *conn,
					 const char *ca_cert_id)
{
#ifndef OPENSSL_NO_ENGINE
	X509 *cert;
	SSL_CTX *ssl_ctx = data->ssl;
	X509_STORE *store;

	if (tls_engine_get_cert(conn, ca_cert_id, &cert))
		return -1;

	/* start off the same as tls_connection_ca_cert */
	store = X509_STORE_new();
	if (store == NULL) {
		wpa_printf(MSG_DEBUG, "OpenSSL: %s - failed to allocate new "
			   "certificate store", __func__);
		X509_free(cert);
		return -1;
	}
	SSL_CTX_set_cert_store(ssl_ctx, store);
	if (!X509_STORE_add_cert(store, cert)) {
		unsigned long err = ERR_peek_error();
		tls_show_errors(MSG_WARNING, __func__,
				"Failed to add CA certificate from engine "
				"to certificate store");
		if (ERR_GET_LIB(err) == ERR_LIB_X509 &&
		    ERR_GET_REASON(err) == X509_R_CERT_ALREADY_IN_HASH_TABLE) {
			wpa_printf(MSG_DEBUG, "OpenSSL: %s - ignoring cert"
				   " already in hash table error",
				   __func__);
		} else {
			X509_free(cert);
			return -1;
		}
	}
	X509_free(cert);
	wpa_printf(MSG_DEBUG, "OpenSSL: %s - added CA certificate from engine "
		   "to certificate store", __func__);
	SSL_set_verify(conn->ssl, SSL_VERIFY_PEER, tls_verify_cb);
	conn->ca_cert_verify = 1;

	return 0;

#else /* OPENSSL_NO_ENGINE */
	return -1;
#endif /* OPENSSL_NO_ENGINE */
}


static int tls_connection_engine_private_key(struct tls_connection *conn)
{
#if defined(ANDROID) || !defined(OPENSSL_NO_ENGINE)
	if (SSL_use_PrivateKey(conn->ssl, conn->private_key) != 1) {
		tls_show_errors(MSG_ERROR, __func__,
				"ENGINE: cannot use private key for TLS");
		return -1;
	}
	if (!SSL_check_private_key(conn->ssl)) {
		tls_show_errors(MSG_INFO, __func__,
				"Private key failed verification");
		return -1;
	}
	return 0;
#else /* OPENSSL_NO_ENGINE */
	wpa_printf(MSG_ERROR, "SSL: Configuration uses engine, but "
		   "engine support was not compiled in");
	return -1;
#endif /* OPENSSL_NO_ENGINE */
}


static int tls_connection_private_key(struct tls_data *data,
				      struct tls_connection *conn,
				      const char *private_key,
				      const char *private_key_passwd,
				      const u8 *private_key_blob,
				      size_t private_key_blob_len)
{
	SSL_CTX *ssl_ctx = data->ssl;
	char *passwd;
	int ok;

	if (private_key == NULL && private_key_blob == NULL)
		return 0;

	if (private_key_passwd) {
		passwd = os_strdup(private_key_passwd);
		if (passwd == NULL)
			return -1;
	} else
		passwd = NULL;

	SSL_CTX_set_default_passwd_cb(ssl_ctx, tls_passwd_cb);
	SSL_CTX_set_default_passwd_cb_userdata(ssl_ctx, passwd);

	ok = 0;
	while (private_key_blob) {
		if (SSL_use_PrivateKey_ASN1(EVP_PKEY_RSA, conn->ssl,
					    (u8 *) private_key_blob,
					    private_key_blob_len) == 1) {
			wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_PrivateKey_"
				   "ASN1(EVP_PKEY_RSA) --> OK");
			ok = 1;
			break;
		}

		if (SSL_use_PrivateKey_ASN1(EVP_PKEY_DSA, conn->ssl,
					    (u8 *) private_key_blob,
					    private_key_blob_len) == 1) {
			wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_PrivateKey_"
				   "ASN1(EVP_PKEY_DSA) --> OK");
			ok = 1;
			break;
		}

		if (SSL_use_RSAPrivateKey_ASN1(conn->ssl,
					       (u8 *) private_key_blob,
					       private_key_blob_len) == 1) {
			wpa_printf(MSG_DEBUG, "OpenSSL: "
				   "SSL_use_RSAPrivateKey_ASN1 --> OK");
			ok = 1;
			break;
		}

		if (tls_read_pkcs12_blob(data, conn->ssl, private_key_blob,
					 private_key_blob_len, passwd) == 0) {
			wpa_printf(MSG_DEBUG, "OpenSSL: PKCS#12 as blob --> "
				   "OK");
			ok = 1;
			break;
		}

		break;
	}

	while (!ok && private_key) {
#ifndef OPENSSL_NO_STDIO
		if (SSL_use_PrivateKey_file(conn->ssl, private_key,
					    SSL_FILETYPE_ASN1) == 1) {
			wpa_printf(MSG_DEBUG, "OpenSSL: "
				   "SSL_use_PrivateKey_File (DER) --> OK");
			ok = 1;
			break;
		}

		if (SSL_use_PrivateKey_file(conn->ssl, private_key,
					    SSL_FILETYPE_PEM) == 1) {
			wpa_printf(MSG_DEBUG, "OpenSSL: "
				   "SSL_use_PrivateKey_File (PEM) --> OK");
			ok = 1;
			break;
		}
#else /* OPENSSL_NO_STDIO */
		wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO",
			   __func__);
#endif /* OPENSSL_NO_STDIO */

		if (tls_read_pkcs12(data, conn->ssl, private_key, passwd)
		    == 0) {
			wpa_printf(MSG_DEBUG, "OpenSSL: Reading PKCS#12 file "
				   "--> OK");
			ok = 1;
			break;
		}

		if (tls_cryptoapi_cert(conn->ssl, private_key) == 0) {
			wpa_printf(MSG_DEBUG, "OpenSSL: Using CryptoAPI to "
				   "access certificate store --> OK");
			ok = 1;
			break;
		}

		break;
	}

	if (!ok) {
		tls_show_errors(MSG_INFO, __func__,
				"Failed to load private key");
		os_free(passwd);
		return -1;
	}
	ERR_clear_error();
	SSL_CTX_set_default_passwd_cb(ssl_ctx, NULL);
	os_free(passwd);

	if (!SSL_check_private_key(conn->ssl)) {
		tls_show_errors(MSG_INFO, __func__, "Private key failed "
				"verification");
		return -1;
	}

	wpa_printf(MSG_DEBUG, "SSL: Private key loaded successfully");
	return 0;
}


static int tls_global_private_key(struct tls_data *data,
				  const char *private_key,
				  const char *private_key_passwd)
{
	SSL_CTX *ssl_ctx = data->ssl;
	char *passwd;

	if (private_key == NULL)
		return 0;

	if (private_key_passwd) {
		passwd = os_strdup(private_key_passwd);
		if (passwd == NULL)
			return -1;
	} else
		passwd = NULL;

	SSL_CTX_set_default_passwd_cb(ssl_ctx, tls_passwd_cb);
	SSL_CTX_set_default_passwd_cb_userdata(ssl_ctx, passwd);
	if (
#ifndef OPENSSL_NO_STDIO
	    SSL_CTX_use_PrivateKey_file(ssl_ctx, private_key,
					SSL_FILETYPE_ASN1) != 1 &&
	    SSL_CTX_use_PrivateKey_file(ssl_ctx, private_key,
					SSL_FILETYPE_PEM) != 1 &&
#endif /* OPENSSL_NO_STDIO */
	    tls_read_pkcs12(data, NULL, private_key, passwd)) {
		tls_show_errors(MSG_INFO, __func__,
				"Failed to load private key");
		os_free(passwd);
		ERR_clear_error();
		return -1;
	}
	os_free(passwd);
	ERR_clear_error();
	SSL_CTX_set_default_passwd_cb(ssl_ctx, NULL);

	if (!SSL_CTX_check_private_key(ssl_ctx)) {
		tls_show_errors(MSG_INFO, __func__,
				"Private key failed verification");
		return -1;
	}

	return 0;
}


static int tls_connection_dh(struct tls_connection *conn, const char *dh_file)
{
#ifdef OPENSSL_NO_DH
	if (dh_file == NULL)
		return 0;
	wpa_printf(MSG_ERROR, "TLS: openssl does not include DH support, but "
		   "dh_file specified");
	return -1;
#else /* OPENSSL_NO_DH */
	DH *dh;
	BIO *bio;

	/* TODO: add support for dh_blob */
	if (dh_file == NULL)
		return 0;
	if (conn == NULL)
		return -1;

	bio = BIO_new_file(dh_file, "r");
	if (bio == NULL) {
		wpa_printf(MSG_INFO, "TLS: Failed to open DH file '%s': %s",
			   dh_file, ERR_error_string(ERR_get_error(), NULL));
		return -1;
	}
	dh = PEM_read_bio_DHparams(bio, NULL, NULL, NULL);
	BIO_free(bio);
#ifndef OPENSSL_NO_DSA
	while (dh == NULL) {
		DSA *dsa;
		wpa_printf(MSG_DEBUG, "TLS: Failed to parse DH file '%s': %s -"
			   " trying to parse as DSA params", dh_file,
			   ERR_error_string(ERR_get_error(), NULL));
		bio = BIO_new_file(dh_file, "r");
		if (bio == NULL)
			break;
		dsa = PEM_read_bio_DSAparams(bio, NULL, NULL, NULL);
		BIO_free(bio);
		if (!dsa) {
			wpa_printf(MSG_DEBUG, "TLS: Failed to parse DSA file "
				   "'%s': %s", dh_file,
				   ERR_error_string(ERR_get_error(), NULL));
			break;
		}

		wpa_printf(MSG_DEBUG, "TLS: DH file in DSA param format");
		dh = DSA_dup_DH(dsa);
		DSA_free(dsa);
		if (dh == NULL) {
			wpa_printf(MSG_INFO, "TLS: Failed to convert DSA "
				   "params into DH params");
			break;
		}
		break;
	}
#endif /* !OPENSSL_NO_DSA */
	if (dh == NULL) {
		wpa_printf(MSG_INFO, "TLS: Failed to read/parse DH/DSA file "
			   "'%s'", dh_file);
		return -1;
	}

	if (SSL_set_tmp_dh(conn->ssl, dh) != 1) {
		wpa_printf(MSG_INFO, "TLS: Failed to set DH params from '%s': "
			   "%s", dh_file,
			   ERR_error_string(ERR_get_error(), NULL));
		DH_free(dh);
		return -1;
	}
	DH_free(dh);
	return 0;
#endif /* OPENSSL_NO_DH */
}


static int tls_global_dh(struct tls_data *data, const char *dh_file)
{
#ifdef OPENSSL_NO_DH
	if (dh_file == NULL)
		return 0;
	wpa_printf(MSG_ERROR, "TLS: openssl does not include DH support, but "
		   "dh_file specified");
	return -1;
#else /* OPENSSL_NO_DH */
	SSL_CTX *ssl_ctx = data->ssl;
	DH *dh;
	BIO *bio;

	/* TODO: add support for dh_blob */
	if (dh_file == NULL)
		return 0;
	if (ssl_ctx == NULL)
		return -1;

	bio = BIO_new_file(dh_file, "r");
	if (bio == NULL) {
		wpa_printf(MSG_INFO, "TLS: Failed to open DH file '%s': %s",
			   dh_file, ERR_error_string(ERR_get_error(), NULL));
		return -1;
	}
	dh = PEM_read_bio_DHparams(bio, NULL, NULL, NULL);
	BIO_free(bio);
#ifndef OPENSSL_NO_DSA
	while (dh == NULL) {
		DSA *dsa;
		wpa_printf(MSG_DEBUG, "TLS: Failed to parse DH file '%s': %s -"
			   " trying to parse as DSA params", dh_file,
			   ERR_error_string(ERR_get_error(), NULL));
		bio = BIO_new_file(dh_file, "r");
		if (bio == NULL)
			break;
		dsa = PEM_read_bio_DSAparams(bio, NULL, NULL, NULL);
		BIO_free(bio);
		if (!dsa) {
			wpa_printf(MSG_DEBUG, "TLS: Failed to parse DSA file "
				   "'%s': %s", dh_file,
				   ERR_error_string(ERR_get_error(), NULL));
			break;
		}

		wpa_printf(MSG_DEBUG, "TLS: DH file in DSA param format");
		dh = DSA_dup_DH(dsa);
		DSA_free(dsa);
		if (dh == NULL) {
			wpa_printf(MSG_INFO, "TLS: Failed to convert DSA "
				   "params into DH params");
			break;
		}
		break;
	}
#endif /* !OPENSSL_NO_DSA */
	if (dh == NULL) {
		wpa_printf(MSG_INFO, "TLS: Failed to read/parse DH/DSA file "
			   "'%s'", dh_file);
		return -1;
	}

	if (SSL_CTX_set_tmp_dh(ssl_ctx, dh) != 1) {
		wpa_printf(MSG_INFO, "TLS: Failed to set DH params from '%s': "
			   "%s", dh_file,
			   ERR_error_string(ERR_get_error(), NULL));
		DH_free(dh);
		return -1;
	}
	DH_free(dh);
	return 0;
#endif /* OPENSSL_NO_DH */
}


int tls_connection_get_random(void *ssl_ctx, struct tls_connection *conn,
			      struct tls_random *keys)
{
	SSL *ssl;

	if (conn == NULL || keys == NULL)
		return -1;
	ssl = conn->ssl;
	if (ssl == NULL)
		return -1;

	os_memset(keys, 0, sizeof(*keys));
	keys->client_random = conn->client_random;
	keys->client_random_len = SSL_get_client_random(
		ssl, conn->client_random, sizeof(conn->client_random));
	keys->server_random = conn->server_random;
	keys->server_random_len = SSL_get_server_random(
		ssl, conn->server_random, sizeof(conn->server_random));

	return 0;
}


#ifndef CONFIG_FIPS
static int openssl_get_keyblock_size(SSL *ssl)
{
#if OPENSSL_VERSION_NUMBER < 0x10100000L || defined(LIBRESSL_VERSION_NUMBER)
	const EVP_CIPHER *c;
	const EVP_MD *h;
	int md_size;

	if (ssl->enc_read_ctx == NULL || ssl->enc_read_ctx->cipher == NULL ||
	    ssl->read_hash == NULL)
		return -1;

	c = ssl->enc_read_ctx->cipher;
	h = EVP_MD_CTX_md(ssl->read_hash);
	if (h)
		md_size = EVP_MD_size(h);
	else if (ssl->s3)
		md_size = ssl->s3->tmp.new_mac_secret_size;
	else
		return -1;

	wpa_printf(MSG_DEBUG, "OpenSSL: keyblock size: key_len=%d MD_size=%d "
		   "IV_len=%d", EVP_CIPHER_key_length(c), md_size,
		   EVP_CIPHER_iv_length(c));
	return 2 * (EVP_CIPHER_key_length(c) +
		    md_size +
		    EVP_CIPHER_iv_length(c));
#else
	const SSL_CIPHER *ssl_cipher;
	int cipher, digest;
	const EVP_CIPHER *c;
	const EVP_MD *h;

	ssl_cipher = SSL_get_current_cipher(ssl);
	if (!ssl_cipher)
		return -1;
	cipher = SSL_CIPHER_get_cipher_nid(ssl_cipher);
	digest = SSL_CIPHER_get_digest_nid(ssl_cipher);
	wpa_printf(MSG_DEBUG, "OpenSSL: cipher nid %d digest nid %d",
		   cipher, digest);
	if (cipher < 0 || digest < 0)
		return -1;
	c = EVP_get_cipherbynid(cipher);
	h = EVP_get_digestbynid(digest);
	if (!c || !h)
		return -1;

	wpa_printf(MSG_DEBUG,
		   "OpenSSL: keyblock size: key_len=%d MD_size=%d IV_len=%d",
		   EVP_CIPHER_key_length(c), EVP_MD_size(h),
		   EVP_CIPHER_iv_length(c));
	return 2 * (EVP_CIPHER_key_length(c) + EVP_MD_size(h) +
		    EVP_CIPHER_iv_length(c));
#endif
}
#endif /* CONFIG_FIPS */


static int openssl_tls_prf(struct tls_connection *conn,
			   const char *label, int server_random_first,
			   int skip_keyblock, u8 *out, size_t out_len)
{
#ifdef CONFIG_FIPS
	wpa_printf(MSG_ERROR, "OpenSSL: TLS keys cannot be exported in FIPS "
		   "mode");
	return -1;
#else /* CONFIG_FIPS */
	SSL *ssl;
	SSL_SESSION *sess;
	u8 *rnd;
	int ret = -1;
	int skip = 0;
	u8 *tmp_out = NULL;
	u8 *_out = out;
	unsigned char client_random[SSL3_RANDOM_SIZE];
	unsigned char server_random[SSL3_RANDOM_SIZE];
	unsigned char master_key[64];
	size_t master_key_len;
	const char *ver;

	/*
	 * TLS library did not support key generation, so get the needed TLS
	 * session parameters and use an internal implementation of TLS PRF to
	 * derive the key.
	 */

	if (conn == NULL)
		return -1;
	ssl = conn->ssl;
	if (ssl == NULL)
		return -1;
	ver = SSL_get_version(ssl);
	sess = SSL_get_session(ssl);
	if (!ver || !sess)
		return -1;

	if (skip_keyblock) {
		skip = openssl_get_keyblock_size(ssl);
		if (skip < 0)
			return -1;
		tmp_out = os_malloc(skip + out_len);
		if (!tmp_out)
			return -1;
		_out = tmp_out;
	}

	rnd = os_malloc(2 * SSL3_RANDOM_SIZE);
	if (!rnd) {
		os_free(tmp_out);
		return -1;
	}

	SSL_get_client_random(ssl, client_random, sizeof(client_random));
	SSL_get_server_random(ssl, server_random, sizeof(server_random));
	master_key_len = SSL_SESSION_get_master_key(sess, master_key,
						    sizeof(master_key));

	if (server_random_first) {
		os_memcpy(rnd, server_random, SSL3_RANDOM_SIZE);
		os_memcpy(rnd + SSL3_RANDOM_SIZE, client_random,
			  SSL3_RANDOM_SIZE);
	} else {
		os_memcpy(rnd, client_random, SSL3_RANDOM_SIZE);
		os_memcpy(rnd + SSL3_RANDOM_SIZE, server_random,
			  SSL3_RANDOM_SIZE);
	}

	if (os_strcmp(ver, "TLSv1.2") == 0) {
		tls_prf_sha256(master_key, master_key_len,
			       label, rnd, 2 * SSL3_RANDOM_SIZE,
			       _out, skip + out_len);
		ret = 0;
	} else if (tls_prf_sha1_md5(master_key, master_key_len,
				    label, rnd, 2 * SSL3_RANDOM_SIZE,
				    _out, skip + out_len) == 0) {
		ret = 0;
	}
	os_memset(master_key, 0, sizeof(master_key));
	os_free(rnd);
	if (ret == 0 && skip_keyblock)
		os_memcpy(out, _out + skip, out_len);
	bin_clear_free(tmp_out, skip);

	return ret;
#endif /* CONFIG_FIPS */
}


int tls_connection_prf(void *tls_ctx, struct tls_connection *conn,
		       const char *label, int server_random_first,
		       int skip_keyblock, u8 *out, size_t out_len)
{
	if (conn == NULL)
		return -1;
	if (server_random_first || skip_keyblock)
		return openssl_tls_prf(conn, label,
				       server_random_first, skip_keyblock,
				       out, out_len);
	if (SSL_export_keying_material(conn->ssl, out, out_len, label,
				       os_strlen(label), NULL, 0, 0) == 1) {
		wpa_printf(MSG_DEBUG, "OpenSSL: Using internal PRF");
		return 0;
	}
	return openssl_tls_prf(conn, label, server_random_first,
			       skip_keyblock, out, out_len);
}


static struct wpabuf *
openssl_handshake(struct tls_connection *conn, const struct wpabuf *in_data,
		  int server)
{
	int res;
	struct wpabuf *out_data;

	/*
	 * Give TLS handshake data from the server (if available) to OpenSSL
	 * for processing.
	 */
	if (in_data && wpabuf_len(in_data) > 0 &&
	    BIO_write(conn->ssl_in, wpabuf_head(in_data), wpabuf_len(in_data))
	    < 0) {
		tls_show_errors(MSG_INFO, __func__,
				"Handshake failed - BIO_write");
		return NULL;
	}

	/* Initiate TLS handshake or continue the existing handshake */
	if (server)
		res = SSL_accept(conn->ssl);
	else
		res = SSL_connect(conn->ssl);
	if (res != 1) {
		int err = SSL_get_error(conn->ssl, res);
		if (err == SSL_ERROR_WANT_READ)
			wpa_printf(MSG_DEBUG, "SSL: SSL_connect - want "
				   "more data");
		else if (err == SSL_ERROR_WANT_WRITE)
			wpa_printf(MSG_DEBUG, "SSL: SSL_connect - want to "
				   "write");
		else {
			tls_show_errors(MSG_INFO, __func__, "SSL_connect");
			conn->failed++;
		}
	}

	/* Get the TLS handshake data to be sent to the server */
	res = BIO_ctrl_pending(conn->ssl_out);
	wpa_printf(MSG_DEBUG, "SSL: %d bytes pending from ssl_out", res);
	out_data = wpabuf_alloc(res);
	if (out_data == NULL) {
		wpa_printf(MSG_DEBUG, "SSL: Failed to allocate memory for "
			   "handshake output (%d bytes)", res);
		if (BIO_reset(conn->ssl_out) < 0) {
			tls_show_errors(MSG_INFO, __func__,
					"BIO_reset failed");
		}
		return NULL;
	}
	res = res == 0 ? 0 : BIO_read(conn->ssl_out, wpabuf_mhead(out_data),
				      res);
	if (res < 0) {
		tls_show_errors(MSG_INFO, __func__,
				"Handshake failed - BIO_read");
		if (BIO_reset(conn->ssl_out) < 0) {
			tls_show_errors(MSG_INFO, __func__,
					"BIO_reset failed");
		}
		wpabuf_free(out_data);
		return NULL;
	}
	wpabuf_put(out_data, res);

	return out_data;
}


static struct wpabuf *
openssl_get_appl_data(struct tls_connection *conn, size_t max_len)
{
	struct wpabuf *appl_data;
	int res;

	appl_data = wpabuf_alloc(max_len + 100);
	if (appl_data == NULL)
		return NULL;

	res = SSL_read(conn->ssl, wpabuf_mhead(appl_data),
		       wpabuf_size(appl_data));
	if (res < 0) {
		int err = SSL_get_error(conn->ssl, res);
		if (err == SSL_ERROR_WANT_READ ||
		    err == SSL_ERROR_WANT_WRITE) {
			wpa_printf(MSG_DEBUG, "SSL: No Application Data "
				   "included");
		} else {
			tls_show_errors(MSG_INFO, __func__,
					"Failed to read possible "
					"Application Data");
		}
		wpabuf_free(appl_data);
		return NULL;
	}

	wpabuf_put(appl_data, res);
	wpa_hexdump_buf_key(MSG_MSGDUMP, "SSL: Application Data in Finished "
			    "message", appl_data);

	return appl_data;
}


static struct wpabuf *
openssl_connection_handshake(struct tls_connection *conn,
			     const struct wpabuf *in_data,
			     struct wpabuf **appl_data, int server)
{
	struct wpabuf *out_data;

	if (appl_data)
		*appl_data = NULL;

	out_data = openssl_handshake(conn, in_data, server);
	if (out_data == NULL)
		return NULL;
	if (conn->invalid_hb_used) {
		wpa_printf(MSG_INFO, "TLS: Heartbeat attack detected - do not send response");
		wpabuf_free(out_data);
		return NULL;
	}

	if (SSL_is_init_finished(conn->ssl)) {
		wpa_printf(MSG_DEBUG,
			   "OpenSSL: Handshake finished - resumed=%d",
			   tls_connection_resumed(conn->ssl_ctx, conn));
		if (appl_data && in_data)
			*appl_data = openssl_get_appl_data(conn,
							   wpabuf_len(in_data));
	}

	if (conn->invalid_hb_used) {
		wpa_printf(MSG_INFO, "TLS: Heartbeat attack detected - do not send response");
		if (appl_data) {
			wpabuf_free(*appl_data);
			*appl_data = NULL;
		}
		wpabuf_free(out_data);
		return NULL;
	}

	return out_data;
}


struct wpabuf *
tls_connection_handshake(void *ssl_ctx, struct tls_connection *conn,
			 const struct wpabuf *in_data,
			 struct wpabuf **appl_data)
{
	return openssl_connection_handshake(conn, in_data, appl_data, 0);
}


struct wpabuf * tls_connection_server_handshake(void *tls_ctx,
						struct tls_connection *conn,
						const struct wpabuf *in_data,
						struct wpabuf **appl_data)
{
	return openssl_connection_handshake(conn, in_data, appl_data, 1);
}


struct wpabuf * tls_connection_encrypt(void *tls_ctx,
				       struct tls_connection *conn,
				       const struct wpabuf *in_data)
{
	int res;
	struct wpabuf *buf;

	if (conn == NULL)
		return NULL;

	/* Give plaintext data for OpenSSL to encrypt into the TLS tunnel. */
	if ((res = BIO_reset(conn->ssl_in)) < 0 ||
	    (res = BIO_reset(conn->ssl_out)) < 0) {
		tls_show_errors(MSG_INFO, __func__, "BIO_reset failed");
		return NULL;
	}
	res = SSL_write(conn->ssl, wpabuf_head(in_data), wpabuf_len(in_data));
	if (res < 0) {
		tls_show_errors(MSG_INFO, __func__,
				"Encryption failed - SSL_write");
		return NULL;
	}

	/* Read encrypted data to be sent to the server */
	buf = wpabuf_alloc(wpabuf_len(in_data) + 300);
	if (buf == NULL)
		return NULL;
	res = BIO_read(conn->ssl_out, wpabuf_mhead(buf), wpabuf_size(buf));
	if (res < 0) {
		tls_show_errors(MSG_INFO, __func__,
				"Encryption failed - BIO_read");
		wpabuf_free(buf);
		return NULL;
	}
	wpabuf_put(buf, res);

	return buf;
}


struct wpabuf * tls_connection_decrypt(void *tls_ctx,
				       struct tls_connection *conn,
				       const struct wpabuf *in_data)
{
	int res;
	struct wpabuf *buf;

	/* Give encrypted data from TLS tunnel for OpenSSL to decrypt. */
	res = BIO_write(conn->ssl_in, wpabuf_head(in_data),
			wpabuf_len(in_data));
	if (res < 0) {
		tls_show_errors(MSG_INFO, __func__,
				"Decryption failed - BIO_write");
		return NULL;
	}
	if (BIO_reset(conn->ssl_out) < 0) {
		tls_show_errors(MSG_INFO, __func__, "BIO_reset failed");
		return NULL;
	}

	/* Read decrypted data for further processing */
	/*
	 * Even though we try to disable TLS compression, it is possible that
	 * this cannot be done with all TLS libraries. Add extra buffer space
	 * to handle the possibility of the decrypted data being longer than
	 * input data.
	 */
	buf = wpabuf_alloc((wpabuf_len(in_data) + 500) * 3);
	if (buf == NULL)
		return NULL;
	res = SSL_read(conn->ssl, wpabuf_mhead(buf), wpabuf_size(buf));
	if (res < 0) {
		tls_show_errors(MSG_INFO, __func__,
				"Decryption failed - SSL_read");
		wpabuf_free(buf);
		return NULL;
	}
	wpabuf_put(buf, res);

	if (conn->invalid_hb_used) {
		wpa_printf(MSG_INFO, "TLS: Heartbeat attack detected - do not send response");
		wpabuf_free(buf);
		return NULL;
	}

	return buf;
}


int tls_connection_resumed(void *ssl_ctx, struct tls_connection *conn)
{
	return conn ? SSL_cache_hit(conn->ssl) : 0;
}


int tls_connection_set_cipher_list(void *tls_ctx, struct tls_connection *conn,
				   u8 *ciphers)
{
	char buf[500], *pos, *end;
	u8 *c;
	int ret;

	if (conn == NULL || conn->ssl == NULL || ciphers == NULL)
		return -1;

	buf[0] = '\0';
	pos = buf;
	end = pos + sizeof(buf);

	c = ciphers;
	while (*c != TLS_CIPHER_NONE) {
		const char *suite;

		switch (*c) {
		case TLS_CIPHER_RC4_SHA:
			suite = "RC4-SHA";
			break;
		case TLS_CIPHER_AES128_SHA:
			suite = "AES128-SHA";
			break;
		case TLS_CIPHER_RSA_DHE_AES128_SHA:
			suite = "DHE-RSA-AES128-SHA";
			break;
		case TLS_CIPHER_ANON_DH_AES128_SHA:
			suite = "ADH-AES128-SHA";
			break;
		case TLS_CIPHER_RSA_DHE_AES256_SHA:
			suite = "DHE-RSA-AES256-SHA";
			break;
		case TLS_CIPHER_AES256_SHA:
			suite = "AES256-SHA";
			break;
		default:
			wpa_printf(MSG_DEBUG, "TLS: Unsupported "
				   "cipher selection: %d", *c);
			return -1;
		}
		ret = os_snprintf(pos, end - pos, ":%s", suite);
		if (os_snprintf_error(end - pos, ret))
			break;
		pos += ret;

		c++;
	}

	wpa_printf(MSG_DEBUG, "OpenSSL: cipher suites: %s", buf + 1);

#if OPENSSL_VERSION_NUMBER >= 0x10100000L && !defined(LIBRESSL_VERSION_NUMBER)
#if defined(EAP_FAST) || defined(EAP_FAST_DYNAMIC) || defined(EAP_SERVER_FAST)
	if (os_strstr(buf, ":ADH-")) {
		/*
		 * Need to drop to security level 0 to allow anonymous
		 * cipher suites for EAP-FAST.
		 */
		SSL_set_security_level(conn->ssl, 0);
	} else if (SSL_get_security_level(conn->ssl) == 0) {
		/* Force at least security level 1 */
		SSL_set_security_level(conn->ssl, 1);
	}
#endif /* EAP_FAST || EAP_FAST_DYNAMIC || EAP_SERVER_FAST */
#endif

	if (SSL_set_cipher_list(conn->ssl, buf + 1) != 1) {
		tls_show_errors(MSG_INFO, __func__,
				"Cipher suite configuration failed");
		return -1;
	}

	return 0;
}


int tls_get_version(void *ssl_ctx, struct tls_connection *conn,
		    char *buf, size_t buflen)
{
	const char *name;
	if (conn == NULL || conn->ssl == NULL)
		return -1;

	name = SSL_get_version(conn->ssl);
	if (name == NULL)
		return -1;

	os_strlcpy(buf, name, buflen);
	return 0;
}


int tls_get_cipher(void *ssl_ctx, struct tls_connection *conn,
		   char *buf, size_t buflen)
{
	const char *name;
	if (conn == NULL || conn->ssl == NULL)
		return -1;

	name = SSL_get_cipher(conn->ssl);
	if (name == NULL)
		return -1;

	os_strlcpy(buf, name, buflen);
	return 0;
}


int tls_connection_enable_workaround(void *ssl_ctx,
				     struct tls_connection *conn)
{
	SSL_set_options(conn->ssl, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS);

	return 0;
}


#if defined(EAP_FAST) || defined(EAP_FAST_DYNAMIC) || defined(EAP_SERVER_FAST)
/* ClientHello TLS extensions require a patch to openssl, so this function is
 * commented out unless explicitly needed for EAP-FAST in order to be able to
 * build this file with unmodified openssl. */
int tls_connection_client_hello_ext(void *ssl_ctx, struct tls_connection *conn,
				    int ext_type, const u8 *data,
				    size_t data_len)
{
	if (conn == NULL || conn->ssl == NULL || ext_type != 35)
		return -1;

	if (SSL_set_session_ticket_ext(conn->ssl, (void *) data,
				       data_len) != 1)
		return -1;

	return 0;
}
#endif /* EAP_FAST || EAP_FAST_DYNAMIC || EAP_SERVER_FAST */


int tls_connection_get_failed(void *ssl_ctx, struct tls_connection *conn)
{
	if (conn == NULL)
		return -1;
	return conn->failed;
}


int tls_connection_get_read_alerts(void *ssl_ctx, struct tls_connection *conn)
{
	if (conn == NULL)
		return -1;
	return conn->read_alerts;
}


int tls_connection_get_write_alerts(void *ssl_ctx, struct tls_connection *conn)
{
	if (conn == NULL)
		return -1;
	return conn->write_alerts;
}


#ifdef HAVE_OCSP

static void ocsp_debug_print_resp(OCSP_RESPONSE *rsp)
{
#ifndef CONFIG_NO_STDOUT_DEBUG
	BIO *out;
	size_t rlen;
	char *txt;
	int res;

	if (wpa_debug_level > MSG_DEBUG)
		return;

	out = BIO_new(BIO_s_mem());
	if (!out)
		return;

	OCSP_RESPONSE_print(out, rsp, 0);
	rlen = BIO_ctrl_pending(out);
	txt = os_malloc(rlen + 1);
	if (!txt) {
		BIO_free(out);
		return;
	}

	res = BIO_read(out, txt, rlen);
	if (res > 0) {
		txt[res] = '\0';
		wpa_printf(MSG_DEBUG, "OpenSSL: OCSP Response\n%s", txt);
	}
	os_free(txt);
	BIO_free(out);
#endif /* CONFIG_NO_STDOUT_DEBUG */
}


static void debug_print_cert(X509 *cert, const char *title)
{
#ifndef CONFIG_NO_STDOUT_DEBUG
	BIO *out;
	size_t rlen;
	char *txt;
	int res;

	if (wpa_debug_level > MSG_DEBUG)
		return;

	out = BIO_new(BIO_s_mem());
	if (!out)
		return;

	X509_print(out, cert);
	rlen = BIO_ctrl_pending(out);
	txt = os_malloc(rlen + 1);
	if (!txt) {
		BIO_free(out);
		return;
	}

	res = BIO_read(out, txt, rlen);
	if (res > 0) {
		txt[res] = '\0';
		wpa_printf(MSG_DEBUG, "OpenSSL: %s\n%s", title, txt);
	}
	os_free(txt);

	BIO_free(out);
#endif /* CONFIG_NO_STDOUT_DEBUG */
}


static int ocsp_resp_cb(SSL *s, void *arg)
{
	struct tls_connection *conn = arg;
	const unsigned char *p;
	int len, status, reason;
	OCSP_RESPONSE *rsp;
	OCSP_BASICRESP *basic;
	OCSP_CERTID *id;
	ASN1_GENERALIZEDTIME *produced_at, *this_update, *next_update;
	X509_STORE *store;
	STACK_OF(X509) *certs = NULL;

	len = SSL_get_tlsext_status_ocsp_resp(s, &p);
	if (!p) {
		wpa_printf(MSG_DEBUG, "OpenSSL: No OCSP response received");
		return (conn->flags & TLS_CONN_REQUIRE_OCSP) ? 0 : 1;
	}

	wpa_hexdump(MSG_DEBUG, "OpenSSL: OCSP response", p, len);

	rsp = d2i_OCSP_RESPONSE(NULL, &p, len);
	if (!rsp) {
		wpa_printf(MSG_INFO, "OpenSSL: Failed to parse OCSP response");
		return 0;
	}

	ocsp_debug_print_resp(rsp);

	status = OCSP_response_status(rsp);
	if (status != OCSP_RESPONSE_STATUS_SUCCESSFUL) {
		wpa_printf(MSG_INFO, "OpenSSL: OCSP responder error %d (%s)",
			   status, OCSP_response_status_str(status));
		return 0;
	}

	basic = OCSP_response_get1_basic(rsp);
	if (!basic) {
		wpa_printf(MSG_INFO, "OpenSSL: Could not find BasicOCSPResponse");
		return 0;
	}

	store = SSL_CTX_get_cert_store(conn->ssl_ctx);
	if (conn->peer_issuer) {
		debug_print_cert(conn->peer_issuer, "Add OCSP issuer");

		if (X509_STORE_add_cert(store, conn->peer_issuer) != 1) {
			tls_show_errors(MSG_INFO, __func__,
					"OpenSSL: Could not add issuer to certificate store");
		}
		certs = sk_X509_new_null();
		if (certs) {
			X509 *cert;
			cert = X509_dup(conn->peer_issuer);
			if (cert && !sk_X509_push(certs, cert)) {
				tls_show_errors(
					MSG_INFO, __func__,
					"OpenSSL: Could not add issuer to OCSP responder trust store");
				X509_free(cert);
				sk_X509_free(certs);
				certs = NULL;
			}
			if (certs && conn->peer_issuer_issuer) {
				cert = X509_dup(conn->peer_issuer_issuer);
				if (cert && !sk_X509_push(certs, cert)) {
					tls_show_errors(
						MSG_INFO, __func__,
						"OpenSSL: Could not add issuer's issuer to OCSP responder trust store");
					X509_free(cert);
				}
			}
		}
	}

	status = OCSP_basic_verify(basic, certs, store, OCSP_TRUSTOTHER);
	sk_X509_pop_free(certs, X509_free);
	if (status <= 0) {
		tls_show_errors(MSG_INFO, __func__,
				"OpenSSL: OCSP response failed verification");
		OCSP_BASICRESP_free(basic);
		OCSP_RESPONSE_free(rsp);
		return 0;
	}

	wpa_printf(MSG_DEBUG, "OpenSSL: OCSP response verification succeeded");

	if (!conn->peer_cert) {
		wpa_printf(MSG_DEBUG, "OpenSSL: Peer certificate not available for OCSP status check");
		OCSP_BASICRESP_free(basic);
		OCSP_RESPONSE_free(rsp);
		return 0;
	}

	if (!conn->peer_issuer) {
		wpa_printf(MSG_DEBUG, "OpenSSL: Peer issuer certificate not available for OCSP status check");
		OCSP_BASICRESP_free(basic);
		OCSP_RESPONSE_free(rsp);
		return 0;
	}

	id = OCSP_cert_to_id(NULL, conn->peer_cert, conn->peer_issuer);
	if (!id) {
		wpa_printf(MSG_DEBUG, "OpenSSL: Could not create OCSP certificate identifier");
		OCSP_BASICRESP_free(basic);
		OCSP_RESPONSE_free(rsp);
		return 0;
	}

	if (!OCSP_resp_find_status(basic, id, &status, &reason, &produced_at,
				   &this_update, &next_update)) {
		wpa_printf(MSG_INFO, "OpenSSL: Could not find current server certificate from OCSP response%s",
			   (conn->flags & TLS_CONN_REQUIRE_OCSP) ? "" :
			   " (OCSP not required)");
		OCSP_BASICRESP_free(basic);
		OCSP_RESPONSE_free(rsp);
		return (conn->flags & TLS_CONN_REQUIRE_OCSP) ? 0 : 1;
	}

	if (!OCSP_check_validity(this_update, next_update, 5 * 60, -1)) {
		tls_show_errors(MSG_INFO, __func__,
				"OpenSSL: OCSP status times invalid");
		OCSP_BASICRESP_free(basic);
		OCSP_RESPONSE_free(rsp);
		return 0;
	}

	OCSP_BASICRESP_free(basic);
	OCSP_RESPONSE_free(rsp);

	wpa_printf(MSG_DEBUG, "OpenSSL: OCSP status for server certificate: %s",
		   OCSP_cert_status_str(status));

	if (status == V_OCSP_CERTSTATUS_GOOD)
		return 1;
	if (status == V_OCSP_CERTSTATUS_REVOKED)
		return 0;
	if (conn->flags & TLS_CONN_REQUIRE_OCSP) {
		wpa_printf(MSG_DEBUG, "OpenSSL: OCSP status unknown, but OCSP required");
		return 0;
	}
	wpa_printf(MSG_DEBUG, "OpenSSL: OCSP status unknown, but OCSP was not required, so allow connection to continue");
	return 1;
}


static int ocsp_status_cb(SSL *s, void *arg)
{
	char *tmp;
	char *resp;
	size_t len;

	if (tls_global->ocsp_stapling_response == NULL) {
		wpa_printf(MSG_DEBUG, "OpenSSL: OCSP status callback - no response configured");
		return SSL_TLSEXT_ERR_OK;
	}

	resp = os_readfile(tls_global->ocsp_stapling_response, &len);
	if (resp == NULL) {
		wpa_printf(MSG_DEBUG, "OpenSSL: OCSP status callback - could not read response file");
		/* TODO: Build OCSPResponse with responseStatus = internalError
		 */
		return SSL_TLSEXT_ERR_OK;
	}
	wpa_printf(MSG_DEBUG, "OpenSSL: OCSP status callback - send cached response");
	tmp = OPENSSL_malloc(len);
	if (tmp == NULL) {
		os_free(resp);
		return SSL_TLSEXT_ERR_ALERT_FATAL;
	}

	os_memcpy(tmp, resp, len);
	os_free(resp);
	SSL_set_tlsext_status_ocsp_resp(s, tmp, len);

	return SSL_TLSEXT_ERR_OK;
}

#endif /* HAVE_OCSP */


int tls_connection_set_params(void *tls_ctx, struct tls_connection *conn,
			      const struct tls_connection_params *params)
{
	struct tls_data *data = tls_ctx;
	int ret;
	unsigned long err;
	int can_pkcs11 = 0;
	const char *key_id = params->key_id;
	const char *cert_id = params->cert_id;
	const char *ca_cert_id = params->ca_cert_id;
	const char *engine_id = params->engine ? params->engine_id : NULL;

	if (conn == NULL)
		return -1;

	if (params->flags & TLS_CONN_REQUIRE_OCSP_ALL) {
		wpa_printf(MSG_INFO,
			   "OpenSSL: ocsp=3 not supported");
		return -1;
	}

	/*
	 * If the engine isn't explicitly configured, and any of the
	 * cert/key fields are actually PKCS#11 URIs, then automatically
	 * use the PKCS#11 ENGINE.
	 */
	if (!engine_id || os_strcmp(engine_id, "pkcs11") == 0)
		can_pkcs11 = 1;

	if (!key_id && params->private_key && can_pkcs11 &&
	    os_strncmp(params->private_key, "pkcs11:", 7) == 0) {
		can_pkcs11 = 2;
		key_id = params->private_key;
	}

	if (!cert_id && params->client_cert && can_pkcs11 &&
	    os_strncmp(params->client_cert, "pkcs11:", 7) == 0) {
		can_pkcs11 = 2;
		cert_id = params->client_cert;
	}

	if (!ca_cert_id && params->ca_cert && can_pkcs11 &&
	    os_strncmp(params->ca_cert, "pkcs11:", 7) == 0) {
		can_pkcs11 = 2;
		ca_cert_id = params->ca_cert;
	}

	/* If we need to automatically enable the PKCS#11 ENGINE, do so. */
	if (can_pkcs11 == 2 && !engine_id)
		engine_id = "pkcs11";

#if defined(EAP_FAST) || defined(EAP_FAST_DYNAMIC) || defined(EAP_SERVER_FAST)
#if OPENSSL_VERSION_NUMBER < 0x10100000L
	if (params->flags & TLS_CONN_EAP_FAST) {
		wpa_printf(MSG_DEBUG,
			   "OpenSSL: Use TLSv1_method() for EAP-FAST");
		if (SSL_set_ssl_method(conn->ssl, TLSv1_method()) != 1) {
			tls_show_errors(MSG_INFO, __func__,
					"Failed to set TLSv1_method() for EAP-FAST");
			return -1;
		}
	}
#endif
#endif /* EAP_FAST || EAP_FAST_DYNAMIC || EAP_SERVER_FAST */

	while ((err = ERR_get_error())) {
		wpa_printf(MSG_INFO, "%s: Clearing pending SSL error: %s",
			   __func__, ERR_error_string(err, NULL));
	}

	if (engine_id) {
		wpa_printf(MSG_DEBUG, "SSL: Initializing TLS engine");
		ret = tls_engine_init(conn, engine_id, params->pin,
				      key_id, cert_id, ca_cert_id);
		if (ret)
			return ret;
	}
	if (tls_connection_set_subject_match(conn,
					     params->subject_match,
					     params->altsubject_match,
					     params->suffix_match,
					     params->domain_match))
		return -1;

	if (engine_id && ca_cert_id) {
		if (tls_connection_engine_ca_cert(data, conn, ca_cert_id))
			return TLS_SET_PARAMS_ENGINE_PRV_VERIFY_FAILED;
	} else if (tls_connection_ca_cert(data, conn, params->ca_cert,
					  params->ca_cert_blob,
					  params->ca_cert_blob_len,
					  params->ca_path))
		return -1;

	if (engine_id && cert_id) {
		if (tls_connection_engine_client_cert(conn, cert_id))
			return TLS_SET_PARAMS_ENGINE_PRV_VERIFY_FAILED;
	} else if (tls_connection_client_cert(conn, params->client_cert,
					      params->client_cert_blob,
					      params->client_cert_blob_len))
		return -1;

	if (engine_id && key_id) {
		wpa_printf(MSG_DEBUG, "TLS: Using private key from engine");
		if (tls_connection_engine_private_key(conn))
			return TLS_SET_PARAMS_ENGINE_PRV_VERIFY_FAILED;
	} else if (tls_connection_private_key(data, conn,
					      params->private_key,
					      params->private_key_passwd,
					      params->private_key_blob,
					      params->private_key_blob_len)) {
		wpa_printf(MSG_INFO, "TLS: Failed to load private key '%s'",
			   params->private_key);
		return -1;
	}

	if (tls_connection_dh(conn, params->dh_file)) {
		wpa_printf(MSG_INFO, "TLS: Failed to load DH file '%s'",
			   params->dh_file);
		return -1;
	}

	if (params->openssl_ciphers &&
	    SSL_set_cipher_list(conn->ssl, params->openssl_ciphers) != 1) {
		wpa_printf(MSG_INFO,
			   "OpenSSL: Failed to set cipher string '%s'",
			   params->openssl_ciphers);
		return -1;
	}

	tls_set_conn_flags(conn->ssl, params->flags);

#ifdef OPENSSL_IS_BORINGSSL
	if (params->flags & TLS_CONN_REQUEST_OCSP) {
		SSL_enable_ocsp_stapling(conn->ssl);
	}
#else /* OPENSSL_IS_BORINGSSL */
#ifdef HAVE_OCSP
	if (params->flags & TLS_CONN_REQUEST_OCSP) {
		SSL_CTX *ssl_ctx = data->ssl;
		SSL_set_tlsext_status_type(conn->ssl, TLSEXT_STATUSTYPE_ocsp);
		SSL_CTX_set_tlsext_status_cb(ssl_ctx, ocsp_resp_cb);
		SSL_CTX_set_tlsext_status_arg(ssl_ctx, conn);
	}
#else /* HAVE_OCSP */
	if (params->flags & TLS_CONN_REQUIRE_OCSP) {
		wpa_printf(MSG_INFO,
			   "OpenSSL: No OCSP support included - reject configuration");
		return -1;
	}
	if (params->flags & TLS_CONN_REQUEST_OCSP) {
		wpa_printf(MSG_DEBUG,
			   "OpenSSL: No OCSP support included - allow optional OCSP case to continue");
	}
#endif /* HAVE_OCSP */
#endif /* OPENSSL_IS_BORINGSSL */

	conn->flags = params->flags;

	tls_get_errors(data);

	return 0;
}


int tls_global_set_params(void *tls_ctx,
			  const struct tls_connection_params *params)
{
	struct tls_data *data = tls_ctx;
	SSL_CTX *ssl_ctx = data->ssl;
	unsigned long err;

	while ((err = ERR_get_error())) {
		wpa_printf(MSG_INFO, "%s: Clearing pending SSL error: %s",
			   __func__, ERR_error_string(err, NULL));
	}

	if (tls_global_ca_cert(data, params->ca_cert) ||
	    tls_global_client_cert(data, params->client_cert) ||
	    tls_global_private_key(data, params->private_key,
				   params->private_key_passwd) ||
	    tls_global_dh(data, params->dh_file)) {
		wpa_printf(MSG_INFO, "TLS: Failed to set global parameters");
		return -1;
	}

	if (params->openssl_ciphers &&
	    SSL_CTX_set_cipher_list(ssl_ctx, params->openssl_ciphers) != 1) {
		wpa_printf(MSG_INFO,
			   "OpenSSL: Failed to set cipher string '%s'",
			   params->openssl_ciphers);
		return -1;
	}

#ifdef SSL_OP_NO_TICKET
	if (params->flags & TLS_CONN_DISABLE_SESSION_TICKET)
		SSL_CTX_set_options(ssl_ctx, SSL_OP_NO_TICKET);
#ifdef SSL_CTX_clear_options
	else
		SSL_CTX_clear_options(ssl_ctx, SSL_OP_NO_TICKET);
#endif /* SSL_clear_options */
#endif /*  SSL_OP_NO_TICKET */

#ifdef HAVE_OCSP
	SSL_CTX_set_tlsext_status_cb(ssl_ctx, ocsp_status_cb);
	SSL_CTX_set_tlsext_status_arg(ssl_ctx, ssl_ctx);
	os_free(tls_global->ocsp_stapling_response);
	if (params->ocsp_stapling_response)
		tls_global->ocsp_stapling_response =
			os_strdup(params->ocsp_stapling_response);
	else
		tls_global->ocsp_stapling_response = NULL;
#endif /* HAVE_OCSP */

	return 0;
}


#if defined(EAP_FAST) || defined(EAP_FAST_DYNAMIC) || defined(EAP_SERVER_FAST)
/* Pre-shared secred requires a patch to openssl, so this function is
 * commented out unless explicitly needed for EAP-FAST in order to be able to
 * build this file with unmodified openssl. */

#if (defined(OPENSSL_IS_BORINGSSL) || OPENSSL_VERSION_NUMBER >= 0x10100000L) && !defined(LIBRESSL_VERSION_NUMBER)
static int tls_sess_sec_cb(SSL *s, void *secret, int *secret_len,
			   STACK_OF(SSL_CIPHER) *peer_ciphers,
			   const SSL_CIPHER **cipher, void *arg)
#else /* OPENSSL_IS_BORINGSSL */
static int tls_sess_sec_cb(SSL *s, void *secret, int *secret_len,
			   STACK_OF(SSL_CIPHER) *peer_ciphers,
			   SSL_CIPHER **cipher, void *arg)
#endif /* OPENSSL_IS_BORINGSSL */
{
	struct tls_connection *conn = arg;
	int ret;

#if OPENSSL_VERSION_NUMBER < 0x10100000L || defined(LIBRESSL_VERSION_NUMBER)
	if (conn == NULL || conn->session_ticket_cb == NULL)
		return 0;

	ret = conn->session_ticket_cb(conn->session_ticket_cb_ctx,
				      conn->session_ticket,
				      conn->session_ticket_len,
				      s->s3->client_random,
				      s->s3->server_random, secret);
#else
	unsigned char client_random[SSL3_RANDOM_SIZE];
	unsigned char server_random[SSL3_RANDOM_SIZE];

	if (conn == NULL || conn->session_ticket_cb == NULL)
		return 0;

	SSL_get_client_random(s, client_random, sizeof(client_random));
	SSL_get_server_random(s, server_random, sizeof(server_random));

	ret = conn->session_ticket_cb(conn->session_ticket_cb_ctx,
				      conn->session_ticket,
				      conn->session_ticket_len,
				      client_random,
				      server_random, secret);
#endif

	os_free(conn->session_ticket);
	conn->session_ticket = NULL;

	if (ret <= 0)
		return 0;

	*secret_len = SSL_MAX_MASTER_KEY_LENGTH;
	return 1;
}


static int tls_session_ticket_ext_cb(SSL *s, const unsigned char *data,
				     int len, void *arg)
{
	struct tls_connection *conn = arg;

	if (conn == NULL || conn->session_ticket_cb == NULL)
		return 0;

	wpa_printf(MSG_DEBUG, "OpenSSL: %s: length=%d", __func__, len);

	os_free(conn->session_ticket);
	conn->session_ticket = NULL;

	wpa_hexdump(MSG_DEBUG, "OpenSSL: ClientHello SessionTicket "
		    "extension", data, len);

	conn->session_ticket = os_malloc(len);
	if (conn->session_ticket == NULL)
		return 0;

	os_memcpy(conn->session_ticket, data, len);
	conn->session_ticket_len = len;

	return 1;
}
#endif /* EAP_FAST || EAP_FAST_DYNAMIC || EAP_SERVER_FAST */


int tls_connection_set_session_ticket_cb(void *tls_ctx,
					 struct tls_connection *conn,
					 tls_session_ticket_cb cb,
					 void *ctx)
{
#if defined(EAP_FAST) || defined(EAP_FAST_DYNAMIC) || defined(EAP_SERVER_FAST)
	conn->session_ticket_cb = cb;
	conn->session_ticket_cb_ctx = ctx;

	if (cb) {
		if (SSL_set_session_secret_cb(conn->ssl, tls_sess_sec_cb,
					      conn) != 1)
			return -1;
		SSL_set_session_ticket_ext_cb(conn->ssl,
					      tls_session_ticket_ext_cb, conn);
	} else {
		if (SSL_set_session_secret_cb(conn->ssl, NULL, NULL) != 1)
			return -1;
		SSL_set_session_ticket_ext_cb(conn->ssl, NULL, NULL);
	}

	return 0;
#else /* EAP_FAST || EAP_FAST_DYNAMIC || EAP_SERVER_FAST */
	return -1;
#endif /* EAP_FAST || EAP_FAST_DYNAMIC || EAP_SERVER_FAST */
}


int tls_get_library_version(char *buf, size_t buf_len)
{
#if OPENSSL_VERSION_NUMBER >= 0x10100000L && !defined(LIBRESSL_VERSION_NUMBER)
	return os_snprintf(buf, buf_len, "OpenSSL build=%s run=%s",
			   OPENSSL_VERSION_TEXT,
			   OpenSSL_version(OPENSSL_VERSION));
#else
	return os_snprintf(buf, buf_len, "OpenSSL build=%s run=%s",
			   OPENSSL_VERSION_TEXT,
			   SSLeay_version(SSLEAY_VERSION));
#endif
}


void tls_connection_set_success_data(struct tls_connection *conn,
				     struct wpabuf *data)
{
	SSL_SESSION *sess;
	struct wpabuf *old;

	if (tls_ex_idx_session < 0)
		goto fail;
	sess = SSL_get_session(conn->ssl);
	if (!sess)
		goto fail;
	old = SSL_SESSION_get_ex_data(sess, tls_ex_idx_session);
	if (old) {
		wpa_printf(MSG_DEBUG, "OpenSSL: Replacing old success data %p",
			   old);
		wpabuf_free(old);
	}
	if (SSL_SESSION_set_ex_data(sess, tls_ex_idx_session, data) != 1)
		goto fail;

	wpa_printf(MSG_DEBUG, "OpenSSL: Stored success data %p", data);
	conn->success_data = 1;
	return;

fail:
	wpa_printf(MSG_INFO, "OpenSSL: Failed to store success data");
	wpabuf_free(data);
}


void tls_connection_set_success_data_resumed(struct tls_connection *conn)
{
	wpa_printf(MSG_DEBUG,
		   "OpenSSL: Success data accepted for resumed session");
	conn->success_data = 1;
}


const struct wpabuf *
tls_connection_get_success_data(struct tls_connection *conn)
{
	SSL_SESSION *sess;

	if (tls_ex_idx_session < 0 ||
	    !(sess = SSL_get_session(conn->ssl)))
		return NULL;
	return SSL_SESSION_get_ex_data(sess, tls_ex_idx_session);
}


void tls_connection_remove_session(struct tls_connection *conn)
{
	SSL_SESSION *sess;

	sess = SSL_get_session(conn->ssl);
	if (!sess)
		return;

	if (SSL_CTX_remove_session(conn->ssl_ctx, sess) != 1)
		wpa_printf(MSG_DEBUG,
			   "OpenSSL: Session was not cached");
	else
		wpa_printf(MSG_DEBUG,
			   "OpenSSL: Removed cached session to disable session resumption");
}