summaryrefslogtreecommitdiff
path: root/lib/libssl/ssl_lib.c
blob: 12d45ea02516fd75a70b5993e85e172dfb368065 (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
/*! \file ssl/ssl_lib.c
 *  \brief Version independent SSL functions.
 */
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
 * All rights reserved.
 *
 * This package is an SSL implementation written
 * by Eric Young (eay@cryptsoft.com).
 * The implementation was written so as to conform with Netscapes SSL.
 *
 * This library is free for commercial and non-commercial use as long as
 * the following conditions are aheared to.  The following conditions
 * apply to all code found in this distribution, be it the RC4, RSA,
 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
 * included with this distribution is covered by the same copyright terms
 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
 *
 * Copyright remains Eric Young's, and as such any Copyright notices in
 * the code are not to be removed.
 * If this package is used in a product, Eric Young should be given attribution
 * as the author of the parts of the library used.
 * This can be in the form of a textual message at program startup or
 * in documentation (online or textual) provided with the package.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *    "This product includes cryptographic software written by
 *     Eric Young (eay@cryptsoft.com)"
 *    The word 'cryptographic' can be left out if the rouines from the library
 *    being used are not cryptographic related :-).
 * 4. If you include any Windows specific code (or a derivative thereof) from
 *    the apps directory (application code) you must include an acknowledgement:
 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
 *
 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * The licence and distribution terms for any publically available version or
 * derivative of this code cannot be changed.  i.e. this code cannot simply be
 * copied and put under another distribution licence
 * [including the GNU Public Licence.]
 */
/* ====================================================================
 * Copyright (c) 1998-2007 The OpenSSL Project.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. All advertising materials mentioning features or use of this
 *    software must display the following acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
 *
 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
 *    endorse or promote products derived from this software without
 *    prior written permission. For written permission, please contact
 *    openssl-core@openssl.org.
 *
 * 5. Products derived from this software may not be called "OpenSSL"
 *    nor may "OpenSSL" appear in their names without prior written
 *    permission of the OpenSSL Project.
 *
 * 6. Redistributions of any form whatsoever must retain the following
 *    acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
 *
 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 * ====================================================================
 *
 * This product includes cryptographic software written by Eric Young
 * (eay@cryptsoft.com).  This product includes software written by Tim
 * Hudson (tjh@cryptsoft.com).
 *
 */
/* ====================================================================
 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
 * ECC cipher suite support in OpenSSL originally developed by
 * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
 */
/* ====================================================================
 * Copyright 2005 Nokia. All rights reserved.
 *
 * The portions of the attached software ("Contribution") is developed by
 * Nokia Corporation and is licensed pursuant to the OpenSSL open source
 * license.
 *
 * The Contribution, originally written by Mika Kousa and Pasi Eronen of
 * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
 * support (see RFC 4279) to OpenSSL.
 *
 * No patent licenses or other rights except those expressly stated in
 * the OpenSSL open source license shall be deemed granted or received
 * expressly, by implication, estoppel, or otherwise.
 *
 * No assurances are provided by Nokia that the Contribution does not
 * infringe the patent or other intellectual property rights of any third
 * party or that the license provides you with all the necessary rights
 * to make use of the Contribution.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
 * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
 * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
 * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
 * OTHERWISE.
 */

#include <stdio.h>
#include "ssl_locl.h"
#include <openssl/objects.h>
#include <openssl/lhash.h>
#include <openssl/x509v3.h>
#include <openssl/rand.h>
#include <openssl/ocsp.h>
#ifndef OPENSSL_NO_DH
#include <openssl/dh.h>
#endif
#ifndef OPENSSL_NO_ENGINE
#include <openssl/engine.h>
#endif

const char *SSL_version_str = OPENSSL_VERSION_TEXT;

SSL3_ENC_METHOD ssl3_undef_enc_method = {
	/*
	 * Evil casts, but these functions are only called if there's a
	 * library bug.
	 */
	.enc = (int (*)(SSL *, int))ssl_undefined_function,
	.mac = (int (*)(SSL *, unsigned char *, int))ssl_undefined_function,
	.setup_key_block = ssl_undefined_function,
	.generate_master_secret = (int (*)(SSL *, unsigned char *,
	    unsigned char *, int))ssl_undefined_function,
	.change_cipher_state = (int (*)(SSL*, int))ssl_undefined_function,
	.final_finish_mac = (int (*)(SSL *,  const char*, int,
	    unsigned char *))ssl_undefined_function,
	.finish_mac_length = 0,
	.cert_verify_mac = (int (*)(SSL *, int,
	    unsigned char *))ssl_undefined_function,
	.client_finished_label = NULL,
	.client_finished_label_len = 0,
	.server_finished_label = NULL,
	.server_finished_label_len = 0,
	.alert_value = (int (*)(int))ssl_undefined_function,
	.export_keying_material = (int (*)(SSL *, unsigned char *, size_t,
	    const char *, size_t, const unsigned char *, size_t,
	    int use_context))ssl_undefined_function,
};

int
SSL_clear(SSL *s)
{
	if (s->method == NULL) {
		SSLerr(SSL_F_SSL_CLEAR,
		    SSL_R_NO_METHOD_SPECIFIED);
		return (0);
	}

	if (ssl_clear_bad_session(s)) {
		SSL_SESSION_free(s->session);
		s->session = NULL;
	}

	s->error = 0;
	s->hit = 0;
	s->shutdown = 0;

	if (s->renegotiate) {
		SSLerr(SSL_F_SSL_CLEAR,
		    ERR_R_INTERNAL_ERROR);
		return (0);
	}

	s->type = 0;

	s->state = SSL_ST_BEFORE|((s->server) ? SSL_ST_ACCEPT : SSL_ST_CONNECT);

	s->version = s->method->version;
	s->client_version = s->version;
	s->rwstate = SSL_NOTHING;
	s->rstate = SSL_ST_READ_HEADER;
#if 0
	s->read_ahead = s->ctx->read_ahead;
#endif

	if (s->init_buf != NULL) {
		BUF_MEM_free(s->init_buf);
		s->init_buf = NULL;
	}

	ssl_clear_cipher_ctx(s);
	ssl_clear_hash_ctx(&s->read_hash);
	ssl_clear_hash_ctx(&s->write_hash);

	s->first_packet = 0;

#if 1
	/*
	 * Check to see if we were changed into a different method, if
	 * so, revert back if we are not doing session-id reuse.
	 */
	if (!s->in_handshake && (s->session == NULL) &&
	    (s->method != s->ctx->method)) {
		s->method->ssl_free(s);
		s->method = s->ctx->method;
		if (!s->method->ssl_new(s))
			return (0);
	} else
#endif
		s->method->ssl_clear(s);
	return (1);
}

/* Used to change an SSL_CTXs default SSL method type */
int
SSL_CTX_set_ssl_version(SSL_CTX *ctx, const SSL_METHOD *meth)
{
	STACK_OF(SSL_CIPHER)	*sk;

	ctx->method = meth;

	sk = ssl_create_cipher_list(ctx->method, &(ctx->cipher_list),
	    &(ctx->cipher_list_by_id), SSL_DEFAULT_CIPHER_LIST);
	if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= 0)) {
		SSLerr(SSL_F_SSL_CTX_SET_SSL_VERSION,
		    SSL_R_SSL_LIBRARY_HAS_NO_CIPHERS);
		return (0);
	}
	return (1);
}

SSL *
SSL_new(SSL_CTX *ctx)
{
	SSL	*s;

	if (ctx == NULL) {
		SSLerr(SSL_F_SSL_NEW,
		    SSL_R_NULL_SSL_CTX);
		return (NULL);
	}
	if (ctx->method == NULL) {
		SSLerr(SSL_F_SSL_NEW,
		    SSL_R_SSL_CTX_HAS_NO_DEFAULT_SSL_VERSION);
		return (NULL);
	}

	s = calloc(1, sizeof(SSL));
	if (s == NULL)
		goto err;


	s->options = ctx->options;
	s->mode = ctx->mode;
	s->max_cert_list = ctx->max_cert_list;

	if (ctx->cert != NULL) {
		/*
		 * Earlier library versions used to copy the pointer to
		 * the CERT, not its contents; only when setting new
		 * parameters for the per-SSL copy, ssl_cert_new would be
		 * called (and the direct reference to the per-SSL_CTX
		 * settings would be lost, but those still were indirectly
		 * accessed for various purposes, and for that reason they
		 * used to be known as s->ctx->default_cert).
		 * Now we don't look at the SSL_CTX's CERT after having
		 * duplicated it once.
		*/
		s->cert = ssl_cert_dup(ctx->cert);
		if (s->cert == NULL)
			goto err;
	} else
		s->cert=NULL; /* Cannot really happen (see SSL_CTX_new) */

	s->read_ahead = ctx->read_ahead;
	s->msg_callback = ctx->msg_callback;
	s->msg_callback_arg = ctx->msg_callback_arg;
	s->verify_mode = ctx->verify_mode;
#if 0
	s->verify_depth = ctx->verify_depth;
#endif
	s->sid_ctx_length = ctx->sid_ctx_length;
	OPENSSL_assert(s->sid_ctx_length <= sizeof s->sid_ctx);
	memcpy(&s->sid_ctx, &ctx->sid_ctx, sizeof(s->sid_ctx));
	s->verify_callback = ctx->default_verify_callback;
	s->generate_session_id = ctx->generate_session_id;

	s->param = X509_VERIFY_PARAM_new();
	if (!s->param)
		goto err;
	X509_VERIFY_PARAM_inherit(s->param, ctx->param);
#if 0
	s->purpose = ctx->purpose;
	s->trust = ctx->trust;
#endif
	s->quiet_shutdown = ctx->quiet_shutdown;
	s->max_send_fragment = ctx->max_send_fragment;

	CRYPTO_add(&ctx->references, 1, CRYPTO_LOCK_SSL_CTX);
	s->ctx = ctx;
#ifndef OPENSSL_NO_TLSEXT
	s->tlsext_debug_cb = 0;
	s->tlsext_debug_arg = NULL;
	s->tlsext_ticket_expected = 0;
	s->tlsext_status_type = -1;
	s->tlsext_status_expected = 0;
	s->tlsext_ocsp_ids = NULL;
	s->tlsext_ocsp_exts = NULL;
	s->tlsext_ocsp_resp = NULL;
	s->tlsext_ocsp_resplen = -1;
	CRYPTO_add(&ctx->references, 1, CRYPTO_LOCK_SSL_CTX);
	s->initial_ctx = ctx;
# ifndef OPENSSL_NO_NEXTPROTONEG
	s->next_proto_negotiated = NULL;
# endif
#endif

	s->verify_result = X509_V_OK;

	s->method = ctx->method;

	if (!s->method->ssl_new(s))
		goto err;

	s->references = 1;
	s->server = (ctx->method->ssl_accept == ssl_undefined_function) ? 0 : 1;

	SSL_clear(s);

	CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data);

#ifndef OPENSSL_NO_PSK
	s->psk_client_callback = ctx->psk_client_callback;
	s->psk_server_callback = ctx->psk_server_callback;
#endif

	return (s);
 err:
	if (s != NULL) {
		if (s->cert != NULL)
			ssl_cert_free(s->cert);
		if (s->ctx != NULL)
			SSL_CTX_free(s->ctx); /* decrement reference count */
		free(s);
	}
	SSLerr(SSL_F_SSL_NEW,
	    ERR_R_MALLOC_FAILURE);
	return (NULL);
}

int
SSL_CTX_set_session_id_context(SSL_CTX *ctx, const unsigned char *sid_ctx,
    unsigned int sid_ctx_len)
{
	if (sid_ctx_len > sizeof ctx->sid_ctx) {
		SSLerr(SSL_F_SSL_CTX_SET_SESSION_ID_CONTEXT,
		    SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
		return (0);
	}
	ctx->sid_ctx_length = sid_ctx_len;
	memcpy(ctx->sid_ctx, sid_ctx, sid_ctx_len);

	return (1);
}

int
SSL_set_session_id_context(SSL *ssl, const unsigned char *sid_ctx,
    unsigned int sid_ctx_len)
{
	if (sid_ctx_len > SSL_MAX_SID_CTX_LENGTH) {
		SSLerr(SSL_F_SSL_SET_SESSION_ID_CONTEXT,
		    SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
		return (0);
	}
	ssl->sid_ctx_length = sid_ctx_len;
	memcpy(ssl->sid_ctx, sid_ctx, sid_ctx_len);

	return (1);
}

int
SSL_CTX_set_generate_session_id(SSL_CTX *ctx, GEN_SESSION_CB cb)
{
	CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
	ctx->generate_session_id = cb;
	CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
	return (1);
}

int
SSL_set_generate_session_id(SSL *ssl, GEN_SESSION_CB cb)
{
	CRYPTO_w_lock(CRYPTO_LOCK_SSL);
	ssl->generate_session_id = cb;
	CRYPTO_w_unlock(CRYPTO_LOCK_SSL);
	return (1);
}

int
SSL_has_matching_session_id(const SSL *ssl, const unsigned char *id,
    unsigned int id_len)
{
	/*
	 * A quick examination of SSL_SESSION_hash and SSL_SESSION_cmp
	 * shows how we can "construct" a session to give us the desired
	 * check - ie. to find if there's a session in the hash table
	 * that would conflict with any new session built out of this
	 * id/id_len and the ssl_version in use by this SSL.
	 */
	SSL_SESSION r, *p;

	if (id_len > sizeof r.session_id)
		return (0);

	r.ssl_version = ssl->version;
	r.session_id_length = id_len;
	memcpy(r.session_id, id, id_len);

	CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
	p = lh_SSL_SESSION_retrieve(ssl->ctx->sessions, &r);
	CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
	return (p != NULL);
}

int
SSL_CTX_set_purpose(SSL_CTX *s, int purpose)
{
	return (X509_VERIFY_PARAM_set_purpose(s->param, purpose));
}

int
SSL_set_purpose(SSL *s, int purpose)
{
	return (X509_VERIFY_PARAM_set_purpose(s->param, purpose));
}

int
SSL_CTX_set_trust(SSL_CTX *s, int trust)
{
	return (X509_VERIFY_PARAM_set_trust(s->param, trust));
}

int
SSL_set_trust(SSL *s, int trust)
{
	return (X509_VERIFY_PARAM_set_trust(s->param, trust));
}

int
SSL_CTX_set1_param(SSL_CTX *ctx, X509_VERIFY_PARAM *vpm)
{
	return (X509_VERIFY_PARAM_set1(ctx->param, vpm));
}

int
SSL_set1_param(SSL *ssl, X509_VERIFY_PARAM *vpm)
{
	return (X509_VERIFY_PARAM_set1(ssl->param, vpm));
}

void
SSL_free(SSL *s)
{
	int	i;

	if (s == NULL)
		return;

	i = CRYPTO_add(&s->references, -1, CRYPTO_LOCK_SSL);
	if (i > 0)
		return;

	if (s->param)
		X509_VERIFY_PARAM_free(s->param);

	CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data);

	if (s->bbio != NULL) {
		/* If the buffering BIO is in place, pop it off */
		if (s->bbio == s->wbio) {
			s->wbio = BIO_pop(s->wbio);
		}
		BIO_free(s->bbio);
		s->bbio = NULL;
	}
	if (s->rbio != NULL)
		BIO_free_all(s->rbio);
	if ((s->wbio != NULL) && (s->wbio != s->rbio))
		BIO_free_all(s->wbio);

	if (s->init_buf != NULL)
		BUF_MEM_free(s->init_buf);

	/* add extra stuff */
	if (s->cipher_list != NULL)
		sk_SSL_CIPHER_free(s->cipher_list);
	if (s->cipher_list_by_id != NULL)
		sk_SSL_CIPHER_free(s->cipher_list_by_id);

	/* Make the next call work :-) */
	if (s->session != NULL) {
		ssl_clear_bad_session(s);
		SSL_SESSION_free(s->session);
	}

	ssl_clear_cipher_ctx(s);
	ssl_clear_hash_ctx(&s->read_hash);
	ssl_clear_hash_ctx(&s->write_hash);

	if (s->cert != NULL)
		ssl_cert_free(s->cert);
	/* Free up if allocated */

#ifndef OPENSSL_NO_TLSEXT
	free(s->tlsext_hostname);
	if (s->initial_ctx)
		SSL_CTX_free(s->initial_ctx);
#ifndef OPENSSL_NO_EC
	free(s->tlsext_ecpointformatlist);
	free(s->tlsext_ellipticcurvelist);
#endif /* OPENSSL_NO_EC */
	free(s->tlsext_opaque_prf_input);
	if (s->tlsext_ocsp_exts)
		sk_X509_EXTENSION_pop_free(s->tlsext_ocsp_exts,
		    X509_EXTENSION_free);
	if (s->tlsext_ocsp_ids)
		sk_OCSP_RESPID_pop_free(s->tlsext_ocsp_ids, OCSP_RESPID_free);
	free(s->tlsext_ocsp_resp);
#endif

	if (s->client_CA != NULL)
		sk_X509_NAME_pop_free(s->client_CA, X509_NAME_free);

	if (s->method != NULL)
		s->method->ssl_free(s);

	if (s->ctx)
		SSL_CTX_free(s->ctx);


#if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG)
	free(s->next_proto_negotiated);
#endif

#ifndef OPENSSL_NO_SRTP
	if (s->srtp_profiles)
		sk_SRTP_PROTECTION_PROFILE_free(s->srtp_profiles);
#endif

	free(s);
}

void
SSL_set_bio(SSL *s, BIO *rbio, BIO *wbio)
{
	/* If the output buffering BIO is still in place, remove it */
	if (s->bbio != NULL) {
		if (s->wbio == s->bbio) {
			s->wbio = s->wbio->next_bio;
			s->bbio->next_bio = NULL;
		}
	}
	if ((s->rbio != NULL) && (s->rbio != rbio))
		BIO_free_all(s->rbio);
	if ((s->wbio != NULL) && (s->wbio != wbio) && (s->rbio != s->wbio))
		BIO_free_all(s->wbio);
	s->rbio = rbio;
	s->wbio = wbio;
}

BIO *
SSL_get_rbio(const SSL *s)
{
	return (s->rbio);
}

BIO *
SSL_get_wbio(const SSL *s)
{
	return (s->wbio);
}

int
SSL_get_fd(const SSL *s)
{
	return (SSL_get_rfd(s));
}

int
SSL_get_rfd(const SSL *s)
{
	int	 ret = -1;
	BIO	*b, *r;

	b = SSL_get_rbio(s);
	r = BIO_find_type(b, BIO_TYPE_DESCRIPTOR);
	if (r != NULL)
		BIO_get_fd(r, &ret);
	return (ret);
}

int
SSL_get_wfd(const SSL *s)
{
	int	 ret = -1;
	BIO	*b, *r;

	b = SSL_get_wbio(s);
	r = BIO_find_type(b, BIO_TYPE_DESCRIPTOR);
	if (r != NULL)
		BIO_get_fd(r, &ret);
	return (ret);
}

int
SSL_set_fd(SSL *s, int fd)
{
	int	 ret = 0;
	BIO	*bio = NULL;

	bio = BIO_new(BIO_s_socket());

	if (bio == NULL) {
		SSLerr(SSL_F_SSL_SET_FD,
		    ERR_R_BUF_LIB);
		goto err;
	}
	BIO_set_fd(bio, fd, BIO_NOCLOSE);
	SSL_set_bio(s, bio, bio);
	ret = 1;
 err:
	return (ret);
}

int
SSL_set_wfd(SSL *s, int fd)
{
	int	 ret = 0;
	BIO	*bio = NULL;

	if ((s->rbio == NULL) || (BIO_method_type(s->rbio) != BIO_TYPE_SOCKET)
	    || ((int)BIO_get_fd(s->rbio, NULL) != fd)) {
		bio = BIO_new(BIO_s_socket());

		if (bio == NULL) {
			SSLerr(SSL_F_SSL_SET_WFD,
			    ERR_R_BUF_LIB);
			goto err;
		}
		BIO_set_fd(bio, fd, BIO_NOCLOSE);
		SSL_set_bio(s, SSL_get_rbio(s), bio);
	} else
		SSL_set_bio(s, SSL_get_rbio(s), SSL_get_rbio(s));
	ret = 1;
 err:
	return (ret);
}

int
SSL_set_rfd(SSL *s, int fd)
{
	int	 ret = 0;
	BIO	*bio = NULL;

	if ((s->wbio == NULL) || (BIO_method_type(s->wbio) != BIO_TYPE_SOCKET)
	    || ((int)BIO_get_fd(s->wbio, NULL) != fd)) {
		bio = BIO_new(BIO_s_socket());

		if (bio == NULL) {
			SSLerr(SSL_F_SSL_SET_RFD,
			    ERR_R_BUF_LIB);
			goto err;
		}
		BIO_set_fd(bio, fd, BIO_NOCLOSE);
		SSL_set_bio(s, bio, SSL_get_wbio(s));
	} else
		SSL_set_bio(s, SSL_get_wbio(s), SSL_get_wbio(s));
	ret = 1;
 err:
	return (ret);
}


/* return length of latest Finished message we sent, copy to 'buf' */
size_t
SSL_get_finished(const SSL *s, void *buf, size_t count)
{
	size_t	ret = 0;

	if (s->s3 != NULL) {
		ret = s->s3->tmp.finish_md_len;
		if (count > ret)
			count = ret;
		memcpy(buf, s->s3->tmp.finish_md, count);
	}
	return (ret);
}

/* return length of latest Finished message we expected, copy to 'buf' */
size_t
SSL_get_peer_finished(const SSL *s, void *buf, size_t count)
{
	size_t	ret = 0;

	if (s->s3 != NULL) {
		ret = s->s3->tmp.peer_finish_md_len;
		if (count > ret)
			count = ret;
		memcpy(buf, s->s3->tmp.peer_finish_md, count);
	}
	return (ret);
}


int
SSL_get_verify_mode(const SSL *s)
{
	return (s->verify_mode);
}

int
SSL_get_verify_depth(const SSL *s)
{
	return (X509_VERIFY_PARAM_get_depth(s->param));
}

int
(*SSL_get_verify_callback(const SSL *s))(int, X509_STORE_CTX *)
{
	return (s->verify_callback);
}

int
SSL_CTX_get_verify_mode(const SSL_CTX *ctx)
{
	return (ctx->verify_mode);
}

int
SSL_CTX_get_verify_depth(const SSL_CTX *ctx)
{
	return (X509_VERIFY_PARAM_get_depth(ctx->param));
}

int (*SSL_CTX_get_verify_callback(const SSL_CTX *ctx))(int, X509_STORE_CTX *)
{
	return (ctx->default_verify_callback);
}

void
SSL_set_verify(SSL *s, int mode,
    int (*callback)(int ok, X509_STORE_CTX *ctx))
{
	s->verify_mode = mode;
	if (callback != NULL)
		s->verify_callback = callback;
}

void
SSL_set_verify_depth(SSL *s, int depth)
{
	X509_VERIFY_PARAM_set_depth(s->param, depth);
}

void
SSL_set_read_ahead(SSL *s, int yes)
{
	s->read_ahead = yes;
}

int
SSL_get_read_ahead(const SSL *s)
{
	return (s->read_ahead);
}

int
SSL_pending(const SSL *s)
{
	/*
	 * SSL_pending cannot work properly if read-ahead is enabled
	 * (SSL_[CTX_]ctrl(..., SSL_CTRL_SET_READ_AHEAD, 1, NULL)),
	 * and it is impossible to fix since SSL_pending cannot report
	 * errors that may be observed while scanning the new data.
	 * (Note that SSL_pending() is often used as a boolean value,
	 * so we'd better not return -1.)
	 */
	return (s->method->ssl_pending(s));
}

X509 *
SSL_get_peer_certificate(const SSL *s)
{
	X509	*r;

	if ((s == NULL) || (s->session == NULL))
		r = NULL;
	else
		r = s->session->peer;

	if (r == NULL)
		return (r);

	CRYPTO_add(&r->references, 1, CRYPTO_LOCK_X509);

	return (r);
}

STACK_OF(X509) *
SSL_get_peer_cert_chain(const SSL *s)
{
	STACK_OF(X509)	*r;

	if ((s == NULL) || (s->session == NULL) ||
	    (s->session->sess_cert == NULL))
		r = NULL;
	else
		r = s->session->sess_cert->cert_chain;

	/*
	 * If we are a client, cert_chain includes the peer's own
	 * certificate;
	 * if we are a server, it does not.
	 */
	return (r);
}

/*
 * Now in theory, since the calling process own 't' it should be safe to
 * modify.  We need to be able to read f without being hassled
 */
void
SSL_copy_session_id(SSL *t, const SSL *f)
{
	CERT	*tmp;

	/* Do we need to to SSL locking? */
	SSL_set_session(t, SSL_get_session(f));

	/*
	 * What if we are setup as SSLv2 but want to talk SSLv3 or
	 * vice-versa.
	 */
	if (t->method != f->method) {
		t->method->ssl_free(t);	/* cleanup current */
		t->method=f->method;	/* change method */
		t->method->ssl_new(t);	/* setup new */
	}

	tmp = t->cert;
	if (f->cert != NULL) {
		CRYPTO_add(&f->cert->references, 1, CRYPTO_LOCK_SSL_CERT);
		t->cert = f->cert;
	} else
		t->cert = NULL;
	if (tmp != NULL)
		ssl_cert_free(tmp);
	SSL_set_session_id_context(t, f->sid_ctx, f->sid_ctx_length);
}

/* Fix this so it checks all the valid key/cert options */
int
SSL_CTX_check_private_key(const SSL_CTX *ctx)
{
	if ((ctx == NULL) || (ctx->cert == NULL) ||
	    (ctx->cert->key->x509 == NULL)) {
		SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,
		    SSL_R_NO_CERTIFICATE_ASSIGNED);
		return (0);
	}
	if (ctx->cert->key->privatekey == NULL) {
		SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,
		    SSL_R_NO_PRIVATE_KEY_ASSIGNED);
		return (0);
	}
	return (X509_check_private_key(ctx->cert->key->x509,
	    ctx->cert->key->privatekey));
}

/* Fix this function so that it takes an optional type parameter */
int
SSL_check_private_key(const SSL *ssl)
{
	if (ssl == NULL) {
		SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,
		    ERR_R_PASSED_NULL_PARAMETER);
		return (0);
	}
	if (ssl->cert == NULL) {
		SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,
		    SSL_R_NO_CERTIFICATE_ASSIGNED);
		return (0);
	}
	if (ssl->cert->key->x509 == NULL) {
		SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,
		    SSL_R_NO_CERTIFICATE_ASSIGNED);
		return (0);
	}
	if (ssl->cert->key->privatekey == NULL) {
		SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,
		    SSL_R_NO_PRIVATE_KEY_ASSIGNED);
		return (0);
	}
	return (X509_check_private_key(ssl->cert->key->x509,
	    ssl->cert->key->privatekey));
}

int
SSL_accept(SSL *s)
{
	if (s->handshake_func == 0)
		SSL_set_accept_state(s); /* Not properly initialized yet */

	return (s->method->ssl_accept(s));
}

int
SSL_connect(SSL *s)
{
	if (s->handshake_func == 0)
		SSL_set_connect_state(s); /* Not properly initialized yet */

	return (s->method->ssl_connect(s));
}

long
SSL_get_default_timeout(const SSL *s)
{
	return (s->method->get_timeout());
}

int
SSL_read(SSL *s, void *buf, int num)
{
	if (s->handshake_func == 0) {
		SSLerr(SSL_F_SSL_READ,
		    SSL_R_UNINITIALIZED);
		return (-1);
	}

	if (s->shutdown & SSL_RECEIVED_SHUTDOWN) {
		s->rwstate = SSL_NOTHING;
		return (0);
	}
	return (s->method->ssl_read(s, buf, num));
}

int
SSL_peek(SSL *s, void *buf, int num)
{
	if (s->handshake_func == 0) {
		SSLerr(SSL_F_SSL_PEEK,
		    SSL_R_UNINITIALIZED);
		return (-1);
	}

	if (s->shutdown & SSL_RECEIVED_SHUTDOWN) {
		return (0);
	}
	return (s->method->ssl_peek(s, buf, num));
}

int
SSL_write(SSL *s, const void *buf, int num)
{
	if (s->handshake_func == 0) {
		SSLerr(SSL_F_SSL_WRITE,
		    SSL_R_UNINITIALIZED);
		return (-1);
	}

	if (s->shutdown & SSL_SENT_SHUTDOWN) {
		s->rwstate = SSL_NOTHING;
		SSLerr(SSL_F_SSL_WRITE,
		    SSL_R_PROTOCOL_IS_SHUTDOWN);
		return (-1);
	}
	return (s->method->ssl_write(s, buf, num));
}

int
SSL_shutdown(SSL *s)
{
	/*
	 * Note that this function behaves differently from what one might
	 * expect.  Return values are 0 for no success (yet),
	 * 1 for success; but calling it once is usually not enough,
	 * even if blocking I/O is used (see ssl3_shutdown).
	 */

	if (s->handshake_func == 0) {
		SSLerr(SSL_F_SSL_SHUTDOWN,
		    SSL_R_UNINITIALIZED);
		return (-1);
	}

	if ((s != NULL) && !SSL_in_init(s))
		return (s->method->ssl_shutdown(s));
	else
		return (1);
}

int
SSL_renegotiate(SSL *s)
{
	if (s->renegotiate == 0)
		s->renegotiate = 1;

	s->new_session = 1;

	return (s->method->ssl_renegotiate(s));
}

int
SSL_renegotiate_abbreviated(SSL *s)
{
	if (s->renegotiate == 0)
		s->renegotiate = 1;

	s->new_session = 0;

	return (s->method->ssl_renegotiate(s));
}

int
SSL_renegotiate_pending(SSL *s)
{
	/*
	 * Becomes true when negotiation is requested;
	 * false again once a handshake has finished.
	 */
	return (s->renegotiate != 0);
}

long
SSL_ctrl(SSL *s, int cmd, long larg, void *parg)
{
	long	l;

	switch (cmd) {
	case SSL_CTRL_GET_READ_AHEAD:
		return (s->read_ahead);
	case SSL_CTRL_SET_READ_AHEAD:
		l = s->read_ahead;
		s->read_ahead = larg;
		return (l);

	case SSL_CTRL_SET_MSG_CALLBACK_ARG:
		s->msg_callback_arg = parg;
		return (1);

	case SSL_CTRL_OPTIONS:
		return (s->options|=larg);
	case SSL_CTRL_CLEAR_OPTIONS:
		return (s->options&=~larg);
	case SSL_CTRL_MODE:
		return (s->mode|=larg);
	case SSL_CTRL_CLEAR_MODE:
		return (s->mode &=~larg);
	case SSL_CTRL_GET_MAX_CERT_LIST:
		return (s->max_cert_list);
	case SSL_CTRL_SET_MAX_CERT_LIST:
		l = s->max_cert_list;
		s->max_cert_list = larg;
		return (l);
	case SSL_CTRL_SET_MTU:
#ifndef OPENSSL_NO_DTLS1
		if (larg < (long)dtls1_min_mtu())
			return (0);
#endif

		if (SSL_version(s) == DTLS1_VERSION ||
		    SSL_version(s) == DTLS1_BAD_VER) {
			s->d1->mtu = larg;
			return (larg);
		}
		return (0);
	case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
		if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
			return (0);
		s->max_send_fragment = larg;
		return (1);
	case SSL_CTRL_GET_RI_SUPPORT:
		if (s->s3)
			return (s->s3->send_connection_binding);
		else return (0);
	default:
		return (s->method->ssl_ctrl(s, cmd, larg, parg));
	}
}

long
SSL_callback_ctrl(SSL *s, int cmd, void (*fp)(void))
{
	switch (cmd) {
	case SSL_CTRL_SET_MSG_CALLBACK:
		s->msg_callback = (void (*)(int write_p, int version,
		    int content_type, const void *buf, size_t len,
		    SSL *ssl, void *arg))(fp);
		return (1);

	default:
		return (s->method->ssl_callback_ctrl(s, cmd, fp));
	}
}

LHASH_OF(SSL_SESSION) *
SSL_CTX_sessions(SSL_CTX *ctx)
{
	return (ctx->sessions);
}

long
SSL_CTX_ctrl(SSL_CTX *ctx, int cmd, long larg, void *parg)
{
	long	l;

	switch (cmd) {
	case SSL_CTRL_GET_READ_AHEAD:
		return (ctx->read_ahead);
	case SSL_CTRL_SET_READ_AHEAD:
		l = ctx->read_ahead;
		ctx->read_ahead = larg;
		return (l);

	case SSL_CTRL_SET_MSG_CALLBACK_ARG:
		ctx->msg_callback_arg = parg;
		return (1);

	case SSL_CTRL_GET_MAX_CERT_LIST:
		return (ctx->max_cert_list);
	case SSL_CTRL_SET_MAX_CERT_LIST:
		l = ctx->max_cert_list;
		ctx->max_cert_list = larg;
		return (l);

	case SSL_CTRL_SET_SESS_CACHE_SIZE:
		l = ctx->session_cache_size;
		ctx->session_cache_size = larg;
		return (l);
	case SSL_CTRL_GET_SESS_CACHE_SIZE:
		return (ctx->session_cache_size);
	case SSL_CTRL_SET_SESS_CACHE_MODE:
		l = ctx->session_cache_mode;
		ctx->session_cache_mode = larg;
		return (l);
	case SSL_CTRL_GET_SESS_CACHE_MODE:
		return (ctx->session_cache_mode);

	case SSL_CTRL_SESS_NUMBER:
		return (lh_SSL_SESSION_num_items(ctx->sessions));
	case SSL_CTRL_SESS_CONNECT:
		return (ctx->stats.sess_connect);
	case SSL_CTRL_SESS_CONNECT_GOOD:
		return (ctx->stats.sess_connect_good);
	case SSL_CTRL_SESS_CONNECT_RENEGOTIATE:
		return (ctx->stats.sess_connect_renegotiate);
	case SSL_CTRL_SESS_ACCEPT:
		return (ctx->stats.sess_accept);
	case SSL_CTRL_SESS_ACCEPT_GOOD:
		return (ctx->stats.sess_accept_good);
	case SSL_CTRL_SESS_ACCEPT_RENEGOTIATE:
		return (ctx->stats.sess_accept_renegotiate);
	case SSL_CTRL_SESS_HIT:
		return (ctx->stats.sess_hit);
	case SSL_CTRL_SESS_CB_HIT:
		return (ctx->stats.sess_cb_hit);
	case SSL_CTRL_SESS_MISSES:
		return (ctx->stats.sess_miss);
	case SSL_CTRL_SESS_TIMEOUTS:
		return (ctx->stats.sess_timeout);
	case SSL_CTRL_SESS_CACHE_FULL:
		return (ctx->stats.sess_cache_full);
	case SSL_CTRL_OPTIONS:
		return (ctx->options|=larg);
	case SSL_CTRL_CLEAR_OPTIONS:
		return (ctx->options&=~larg);
	case SSL_CTRL_MODE:
		return (ctx->mode|=larg);
	case SSL_CTRL_CLEAR_MODE:
		return (ctx->mode&=~larg);
	case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
		if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
			return (0);
		ctx->max_send_fragment = larg;
		return (1);
	default:
		return (ctx->method->ssl_ctx_ctrl(ctx, cmd, larg, parg));
	}
}

long
SSL_CTX_callback_ctrl(SSL_CTX *ctx, int cmd, void (*fp)(void))
{
	switch (cmd) {
	case SSL_CTRL_SET_MSG_CALLBACK:
		ctx->msg_callback = (void (*)(int write_p, int version,
		    int content_type, const void *buf, size_t len, SSL *ssl,
		    void *arg))(fp);
		return (1);

	default:
		return (ctx->method->ssl_ctx_callback_ctrl(ctx, cmd, fp));
	}
}

int
ssl_cipher_id_cmp(const SSL_CIPHER *a, const SSL_CIPHER *b)
{
	long	l;

	l = a->id - b->id;
	if (l == 0L)
		return (0);
	else
		return ((l > 0) ? 1:-1);
}

int
ssl_cipher_ptr_id_cmp(const SSL_CIPHER * const *ap,
    const SSL_CIPHER * const *bp)
{
	long	l;

	l = (*ap)->id - (*bp)->id;
	if (l == 0L)
		return (0);
	else
		return ((l > 0) ? 1:-1);
}

/*
 * Return a STACK of the ciphers available for the SSL and in order of
 * preference.
 */
STACK_OF(SSL_CIPHER) *
SSL_get_ciphers(const SSL *s)
{
	if (s != NULL) {
		if (s->cipher_list != NULL) {
			return (s->cipher_list);
		} else if ((s->ctx != NULL) && (s->ctx->cipher_list != NULL)) {
			return (s->ctx->cipher_list);
		}
	}
	return (NULL);
}

/*
 * Return a STACK of the ciphers available for the SSL and in order of
 * algorithm id.
 */
STACK_OF(SSL_CIPHER) *
ssl_get_ciphers_by_id(SSL *s)
{
	if (s != NULL) {
		if (s->cipher_list_by_id != NULL) {
			return (s->cipher_list_by_id);
		} else if ((s->ctx != NULL) &&
		    (s->ctx->cipher_list_by_id != NULL)) {
			return (s->ctx->cipher_list_by_id);
		}
	}
	return (NULL);
}

/* The old interface to get the same thing as SSL_get_ciphers(). */
const char *
SSL_get_cipher_list(const SSL *s, int n)
{
	SSL_CIPHER		*c;
	STACK_OF(SSL_CIPHER)	*sk;

	if (s == NULL)
		return (NULL);
	sk = SSL_get_ciphers(s);
	if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= n))
		return (NULL);
	c = sk_SSL_CIPHER_value(sk, n);
	if (c == NULL)
		return (NULL);
	return (c->name);
}

/* Specify the ciphers to be used by default by the SSL_CTX. */
int
SSL_CTX_set_cipher_list(SSL_CTX *ctx, const char *str)
{
	STACK_OF(SSL_CIPHER)	*sk;

	sk = ssl_create_cipher_list(ctx->method, &ctx->cipher_list,
	    &ctx->cipher_list_by_id, str);
	/*
	 * ssl_create_cipher_list may return an empty stack if it
	 * was unable to find a cipher matching the given rule string
	 * (for example if the rule string specifies a cipher which
	 * has been disabled). This is not an error as far as
	 * ssl_create_cipher_list is concerned, and hence
	 * ctx->cipher_list and ctx->cipher_list_by_id has been
	 * updated.
	 */
	if (sk == NULL)
		return (0);
	else if (sk_SSL_CIPHER_num(sk) == 0) {
		SSLerr(SSL_F_SSL_CTX_SET_CIPHER_LIST,
		    SSL_R_NO_CIPHER_MATCH);
		return (0);
	}
	return (1);
}

/* Specify the ciphers to be used by the SSL. */
int
SSL_set_cipher_list(SSL *s, const char *str)
{
	STACK_OF(SSL_CIPHER)	*sk;

	sk = ssl_create_cipher_list(s->ctx->method, &s->cipher_list,
	&s->cipher_list_by_id, str);
	/* see comment in SSL_CTX_set_cipher_list */
	if (sk == NULL)
		return (0);
	else if (sk_SSL_CIPHER_num(sk) == 0) {
		SSLerr(SSL_F_SSL_SET_CIPHER_LIST,
		    SSL_R_NO_CIPHER_MATCH);
		return (0);
	}
	return (1);
}

/* works well for SSLv2, not so good for SSLv3 */
char *
SSL_get_shared_ciphers(const SSL *s, char *buf, int len)
{
	char			*end;
	STACK_OF(SSL_CIPHER)	*sk;
	SSL_CIPHER		*c;
	size_t			 curlen = 0;
	int			 i;

	if ((s->session == NULL) || (s->session->ciphers == NULL) ||
		(len < 2))
	return (NULL);

	sk = s->session->ciphers;
	buf[0] = '\0';
	for (i = 0; i < sk_SSL_CIPHER_num(sk); i++) {
		c = sk_SSL_CIPHER_value(sk, i);
		end = buf + curlen;
		if (strlcat(buf, c->name, len) >= len ||
		    (curlen = strlcat(buf, ":", len)) >= len) {
			/* remove truncated cipher from list */
			*end = '\0';
			break;
		}
	}
	/* remove trailing colon */
	if ((end = strrchr(buf, ':')) != NULL)
		*end = '\0';
	return (buf);
}

int
ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk, unsigned char *p,
    int (*put_cb)(const SSL_CIPHER *, unsigned char *))
{
	int		 i, j = 0;
	SSL_CIPHER	*c;
	unsigned char	*q;

	if (sk == NULL)
		return (0);
	q = p;

	for (i = 0; i < sk_SSL_CIPHER_num(sk); i++) {
		c = sk_SSL_CIPHER_value(sk, i);
		/* Skip TLS v1.2 only ciphersuites if lower than v1.2 */
		if ((c->algorithm_ssl & SSL_TLSV1_2) &&
		    (TLS1_get_client_version(s) < TLS1_2_VERSION))
			continue;
#ifndef OPENSSL_NO_PSK
		/* with PSK there must be client callback set */
		if (((c->algorithm_mkey & SSL_kPSK) ||
		    (c->algorithm_auth & SSL_aPSK)) &&
		    s->psk_client_callback == NULL)
			continue;
#endif /* OPENSSL_NO_PSK */
		j = put_cb ? put_cb(c, p) : ssl_put_cipher_by_char(s, c, p);
		p += j;
	}
	/*
	 * If p == q, no ciphers and caller indicates an error. Otherwise
	 * add SCSV if not renegotiating.
	 */
	if (p != q && !s->renegotiate) {
		static SSL_CIPHER scsv = {
			0, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0
		};
		j = put_cb ? put_cb(&scsv, p) :
		    ssl_put_cipher_by_char(s, &scsv, p);
		p += j;
	}

	return (p - q);
}

STACK_OF(SSL_CIPHER) *
ssl_bytes_to_cipher_list(SSL *s, unsigned char *p, int num,
    STACK_OF(SSL_CIPHER) **skp)
{
	const SSL_CIPHER	*c;
	STACK_OF(SSL_CIPHER)	*sk;
	int			 i, n;

	if (s->s3)
		s->s3->send_connection_binding = 0;

	n = ssl_put_cipher_by_char(s, NULL, NULL);
	if ((num % n) != 0) {
		SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,
		    SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
		return (NULL);
	}
	if ((skp == NULL) || (*skp == NULL))
		sk=sk_SSL_CIPHER_new_null(); /* change perhaps later */
	else {
		sk= *skp;
		sk_SSL_CIPHER_zero(sk);
	}

	for (i = 0; i < num; i += n) {
		/* Check for SCSV */
		if (s->s3 && (n != 3 || !p[0]) &&
		    (p[n - 2] == ((SSL3_CK_SCSV >> 8) & 0xff)) &&
		    (p[n - 1] == (SSL3_CK_SCSV & 0xff))) {
			/* SCSV fatal if renegotiating */
			if (s->renegotiate) {
				SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,
				    SSL_R_SCSV_RECEIVED_WHEN_RENEGOTIATING);
				ssl3_send_alert(s, SSL3_AL_FATAL,
				    SSL_AD_HANDSHAKE_FAILURE);

				goto err;
			}
			s->s3->send_connection_binding = 1;
			p += n;
			continue;
		}

		c = ssl_get_cipher_by_char(s, p);
		p += n;
		if (c != NULL) {
			if (!sk_SSL_CIPHER_push(sk, c)) {
				SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,
				    ERR_R_MALLOC_FAILURE);
				goto err;
			}
		}
	}

	if (skp != NULL)
		*skp = sk;
	return (sk);
 err:
	if ((skp == NULL) || (*skp == NULL))
		sk_SSL_CIPHER_free(sk);
	return (NULL);
}


#ifndef OPENSSL_NO_TLSEXT
/*
 * Return a servername extension value if provided in Client Hello, or NULL.
 * So far, only host_name types are defined (RFC 3546).
 */
const char *
SSL_get_servername(const SSL *s, const int type)
{
	if (type != TLSEXT_NAMETYPE_host_name)
		return (NULL);

	return (s->session && !s->tlsext_hostname ?
	    s->session->tlsext_hostname :
	    s->tlsext_hostname);
}

int
SSL_get_servername_type(const SSL *s)
{
	if (s->session &&
	    (!s->tlsext_hostname ?
	    s->session->tlsext_hostname : s->tlsext_hostname))
		return (TLSEXT_NAMETYPE_host_name);
	return (-1);
}

# ifndef OPENSSL_NO_NEXTPROTONEG
/*
 * SSL_select_next_proto implements the standard protocol selection. It is
 * expected that this function is called from the callback set by
 * SSL_CTX_set_next_proto_select_cb.
 *
 * The protocol data is assumed to be a vector of 8-bit, length prefixed byte
 * strings. The length byte itself is not included in the length. A byte
 * string of length 0 is invalid. No byte string may be truncated.
 *
 * The current, but experimental algorithm for selecting the protocol is:
 *
 * 1) If the server doesn't support NPN then this is indicated to the
 * callback. In this case, the client application has to abort the connection
 * or have a default application level protocol.
 *
 * 2) If the server supports NPN, but advertises an empty list then the
 * client selects the first protcol in its list, but indicates via the
 * API that this fallback case was enacted.
 *
 * 3) Otherwise, the client finds the first protocol in the server's list
 * that it supports and selects this protocol. This is because it's
 * assumed that the server has better information about which protocol
 * a client should use.
 *
 * 4) If the client doesn't support any of the server's advertised
 * protocols, then this is treated the same as case 2.
 *
 * It returns either
 * OPENSSL_NPN_NEGOTIATED if a common protocol was found, or
 * OPENSSL_NPN_NO_OVERLAP if the fallback case was reached.
 */
int
SSL_select_next_proto(unsigned char **out, unsigned char *outlen,
    const unsigned char *server, unsigned int server_len,
    const unsigned char *client, unsigned int client_len)
{
	unsigned int		 i, j;
	const unsigned char	*result;
	int			 status = OPENSSL_NPN_UNSUPPORTED;

	/*
	 * For each protocol in server preference order,
	 * see if we support it.
	 */
	for (i = 0; i < server_len; ) {
		for (j = 0; j < client_len; ) {
			if (server[i] == client[j] &&
			    memcmp(&server[i + 1],
			    &client[j + 1], server[i]) == 0) {
				/* We found a match */
				result = &server[i];
				status = OPENSSL_NPN_NEGOTIATED;
				goto found;
			}
			j += client[j];
			j++;
		}
		i += server[i];
		i++;
	}

	/* There's no overlap between our protocols and the server's list. */
	result = client;
	status = OPENSSL_NPN_NO_OVERLAP;

 found:
	*out = (unsigned char *) result + 1;
	*outlen = result[0];
	return (status);
}

/*
 * SSL_get0_next_proto_negotiated sets *data and *len to point to the client's
 * requested protocol for this connection and returns 0. If the client didn't
 * request any protocol, then *data is set to NULL.
 *
 * Note that the client can request any protocol it chooses. The value returned
 * from this function need not be a member of the list of supported protocols
 * provided by the callback.
 */
void
SSL_get0_next_proto_negotiated(const SSL *s, const unsigned char **data,
    unsigned *len)
{
	*data = s->next_proto_negotiated;
	if (!*data) {
		*len = 0;
	} else {
		*len = s->next_proto_negotiated_len;
	}
}

/*
 * SSL_CTX_set_next_protos_advertised_cb sets a callback that is called when a
 * TLS server needs a list of supported protocols for Next Protocol
 * Negotiation. The returned list must be in wire format.  The list is returned
 * by setting |out| to point to it and |outlen| to its length. This memory will
 * not be modified, but one should assume that the SSL* keeps a reference to
 * it.
 *
 * The callback should return SSL_TLSEXT_ERR_OK if it wishes to advertise.
 * Otherwise, no such extension will be included in the ServerHello.
 */
void
SSL_CTX_set_next_protos_advertised_cb(SSL_CTX *ctx, int (*cb) (SSL *ssl,
    const unsigned char **out, unsigned int *outlen, void *arg), void *arg)
{
	ctx->next_protos_advertised_cb = cb;
	ctx->next_protos_advertised_cb_arg = arg;
}

/*
 * SSL_CTX_set_next_proto_select_cb sets a callback that is called when a
 * client needs to select a protocol from the server's provided list. |out|
 * must be set to point to the selected protocol (which may be within |in|).
 * The length of the protocol name must be written into |outlen|. The server's
 * advertised protocols are provided in |in| and |inlen|. The callback can
 * assume that |in| is syntactically valid.
 *
 * The client must select a protocol. It is fatal to the connection if this
 * callback returns a value other than SSL_TLSEXT_ERR_OK.
 */
void
SSL_CTX_set_next_proto_select_cb(SSL_CTX *ctx, int (*cb) (SSL *s,
    unsigned char **out, unsigned char *outlen, const unsigned char *in,
    unsigned int inlen, void *arg), void *arg)
{
	ctx->next_proto_select_cb = cb;
	ctx->next_proto_select_cb_arg = arg;
}
# endif
#endif

int
SSL_export_keying_material(SSL *s, unsigned char *out, size_t olen,
    const char *label, size_t llen, const unsigned char *p, size_t plen,
    int use_context)
{
	if (s->version < TLS1_VERSION)
		return (-1);

	return (s->method->ssl3_enc->export_keying_material(s, out, olen,
	    label, llen, p, plen, use_context));
}

static unsigned long
ssl_session_hash(const SSL_SESSION *a)
{
	unsigned long	l;

	l = (unsigned long)
	    ((unsigned int) a->session_id[0]     )|
	    ((unsigned int) a->session_id[1]<< 8L)|
	    ((unsigned long)a->session_id[2]<<16L)|
	    ((unsigned long)a->session_id[3]<<24L);
	return (l);
}

/*
 * NB: If this function (or indeed the hash function which uses a sort of
 * coarser function than this one) is changed, ensure
 * SSL_CTX_has_matching_session_id() is checked accordingly. It relies on being
 * able to construct an SSL_SESSION that will collide with any existing session
 * with a matching session ID.
 */
static int
ssl_session_cmp(const SSL_SESSION *a, const SSL_SESSION *b)
{
	if (a->ssl_version != b->ssl_version)
		return (1);
	if (a->session_id_length != b->session_id_length)
		return (1);
	return (memcmp(a->session_id, b->session_id, a->session_id_length));
}

/*
 * These wrapper functions should remain rather than redeclaring
 * SSL_SESSION_hash and SSL_SESSION_cmp for void* types and casting each
 * variable. The reason is that the functions aren't static, they're exposed via
 * ssl.h.
 */
static
IMPLEMENT_LHASH_HASH_FN(ssl_session, SSL_SESSION)
static
IMPLEMENT_LHASH_COMP_FN(ssl_session, SSL_SESSION)

SSL_CTX *
SSL_CTX_new(const SSL_METHOD *meth)
{
	SSL_CTX	*ret = NULL;

	if (meth == NULL) {
		SSLerr(SSL_F_SSL_CTX_NEW,
		    SSL_R_NULL_SSL_METHOD_PASSED);
		return (NULL);
	}

	if (SSL_get_ex_data_X509_STORE_CTX_idx() < 0) {
		SSLerr(SSL_F_SSL_CTX_NEW,
		    SSL_R_X509_VERIFICATION_SETUP_PROBLEMS);
		goto err;
	}
	ret = calloc(1, sizeof(SSL_CTX));
	if (ret == NULL)
		goto err;

	ret->method = meth;

	ret->cert_store = NULL;
	ret->session_cache_mode = SSL_SESS_CACHE_SERVER;
	ret->session_cache_size = SSL_SESSION_CACHE_MAX_SIZE_DEFAULT;
	ret->session_cache_head = NULL;
	ret->session_cache_tail = NULL;

	/* We take the system default */
	ret->session_timeout = meth->get_timeout();

	ret->new_session_cb = 0;
	ret->remove_session_cb = 0;
	ret->get_session_cb = 0;
	ret->generate_session_id = 0;

	memset((char *)&ret->stats, 0, sizeof(ret->stats));

	ret->references = 1;
	ret->quiet_shutdown = 0;

	ret->info_callback = NULL;

	ret->app_verify_callback = 0;
	ret->app_verify_arg = NULL;

	ret->max_cert_list = SSL_MAX_CERT_LIST_DEFAULT;
	ret->read_ahead = 0;
	ret->msg_callback = 0;
	ret->msg_callback_arg = NULL;
	ret->verify_mode = SSL_VERIFY_NONE;
#if 0
	ret->verify_depth=-1; /* Don't impose a limit (but x509_lu.c does) */
#endif
	ret->sid_ctx_length = 0;
	ret->default_verify_callback = NULL;
	if ((ret->cert = ssl_cert_new()) == NULL)
		goto err;

	ret->default_passwd_callback = 0;
	ret->default_passwd_callback_userdata = NULL;
	ret->client_cert_cb = 0;
	ret->app_gen_cookie_cb = 0;
	ret->app_verify_cookie_cb = 0;

	ret->sessions = lh_SSL_SESSION_new();
	if (ret->sessions == NULL)
		goto err;
	ret->cert_store = X509_STORE_new();
	if (ret->cert_store == NULL)
		goto err;

	ssl_create_cipher_list(ret->method, &ret->cipher_list,
	    &ret->cipher_list_by_id, SSL_DEFAULT_CIPHER_LIST);
	if (ret->cipher_list == NULL ||
	    sk_SSL_CIPHER_num(ret->cipher_list) <= 0) {
		SSLerr(SSL_F_SSL_CTX_NEW,
		    SSL_R_LIBRARY_HAS_NO_CIPHERS);
		goto err2;
	}

	ret->param = X509_VERIFY_PARAM_new();
	if (!ret->param)
		goto err;

	if ((ret->md5 = EVP_get_digestbyname("ssl3-md5")) == NULL) {
		SSLerr(SSL_F_SSL_CTX_NEW,
		    SSL_R_UNABLE_TO_LOAD_SSL3_MD5_ROUTINES);
		goto err2;
	}
	if ((ret->sha1 = EVP_get_digestbyname("ssl3-sha1")) == NULL) {
		SSLerr(SSL_F_SSL_CTX_NEW,
		    SSL_R_UNABLE_TO_LOAD_SSL3_SHA1_ROUTINES);
		goto err2;
	}

	if ((ret->client_CA = sk_X509_NAME_new_null()) == NULL)
		goto err;

	CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_CTX, ret, &ret->ex_data);

	ret->extra_certs = NULL;
	/* No compression for DTLS */
	if (meth->version != DTLS1_VERSION)
		ret->comp_methods = SSL_COMP_get_compression_methods();

	ret->max_send_fragment = SSL3_RT_MAX_PLAIN_LENGTH;

#ifndef OPENSSL_NO_TLSEXT
	ret->tlsext_servername_callback = 0;
	ret->tlsext_servername_arg = NULL;
	/* Setup RFC4507 ticket keys */
	if ((RAND_pseudo_bytes(ret->tlsext_tick_key_name, 16) <= 0)
	    || (RAND_bytes(ret->tlsext_tick_hmac_key, 16) <= 0)
	    || (RAND_bytes(ret->tlsext_tick_aes_key, 16) <= 0))
		ret->options |= SSL_OP_NO_TICKET;

	ret->tlsext_status_cb = 0;
	ret->tlsext_status_arg = NULL;

# ifndef OPENSSL_NO_NEXTPROTONEG
	ret->next_protos_advertised_cb = 0;
	ret->next_proto_select_cb = 0;
# endif
#endif
#ifndef OPENSSL_NO_PSK
	ret->psk_identity_hint = NULL;
	ret->psk_client_callback = NULL;
	ret->psk_server_callback = NULL;
#endif
#ifndef OPENSSL_NO_ENGINE
	ret->client_cert_engine = NULL;
#ifdef OPENSSL_SSL_CLIENT_ENGINE_AUTO
#define eng_strx(x)	#x
#define eng_str(x)	eng_strx(x)
	/* Use specific client engine automatically... ignore errors */
	{
		ENGINE *eng;
		eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
		if (!eng) {
			ERR_clear_error();
			ENGINE_load_builtin_engines();
			eng = ENGINE_by_id(eng_str(
			    OPENSSL_SSL_CLIENT_ENGINE_AUTO));
		}
		if (!eng || !SSL_CTX_set_client_cert_engine(ret, eng))
			ERR_clear_error();
	}
#endif
#endif
	/*
	 * Default is to connect to non-RI servers. When RI is more widely
	 * deployed might change this.
	 */
	ret->options |= SSL_OP_LEGACY_SERVER_CONNECT;

	return (ret);
 err:
	SSLerr(SSL_F_SSL_CTX_NEW,
	    ERR_R_MALLOC_FAILURE);
 err2:
	if (ret != NULL)
		SSL_CTX_free(ret);
	return (NULL);
}

#if 0
static void
SSL_COMP_free(SSL_COMP *comp)
{
	free(comp);
}
#endif

void
SSL_CTX_free(SSL_CTX *a)
{
	int	i;

	if (a == NULL)
		return;

	i = CRYPTO_add(&a->references, -1, CRYPTO_LOCK_SSL_CTX);
	if (i > 0)
		return;

	if (a->param)
		X509_VERIFY_PARAM_free(a->param);

	/*
	 * Free internal session cache. However: the remove_cb() may reference
	 * the ex_data of SSL_CTX, thus the ex_data store can only be removed
	 * after the sessions were flushed.
	 * As the ex_data handling routines might also touch the session cache,
	 * the most secure solution seems to be: empty (flush) the cache, then
	 * free ex_data, then finally free the cache.
	 * (See ticket [openssl.org #212].)
	 */
	if (a->sessions != NULL)
		SSL_CTX_flush_sessions(a, 0);

	CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_CTX, a, &a->ex_data);

	if (a->sessions != NULL)
		lh_SSL_SESSION_free(a->sessions);

	if (a->cert_store != NULL)
		X509_STORE_free(a->cert_store);
	if (a->cipher_list != NULL)
		sk_SSL_CIPHER_free(a->cipher_list);
	if (a->cipher_list_by_id != NULL)
		sk_SSL_CIPHER_free(a->cipher_list_by_id);
	if (a->cert != NULL)
		ssl_cert_free(a->cert);
	if (a->client_CA != NULL)
		sk_X509_NAME_pop_free(a->client_CA, X509_NAME_free);
	if (a->extra_certs != NULL)
		sk_X509_pop_free(a->extra_certs, X509_free);
#if 0 /* This should never be done, since it removes a global database */
	if (a->comp_methods != NULL)
		sk_SSL_COMP_pop_free(a->comp_methods, SSL_COMP_free);
#else
	a->comp_methods = NULL;
#endif

#ifndef OPENSSL_NO_SRTP
	if (a->srtp_profiles)
		sk_SRTP_PROTECTION_PROFILE_free(a->srtp_profiles);
#endif

#ifndef OPENSSL_NO_PSK
	free(a->psk_identity_hint);
#endif
#ifndef OPENSSL_NO_ENGINE
	if (a->client_cert_engine)
		ENGINE_finish(a->client_cert_engine);
#endif

	free(a);
}

void
SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx, pem_password_cb *cb)
{
	ctx->default_passwd_callback = cb;
}

void
SSL_CTX_set_default_passwd_cb_userdata(SSL_CTX *ctx, void *u)
{
	ctx->default_passwd_callback_userdata = u;
}

void
SSL_CTX_set_cert_verify_callback(SSL_CTX *ctx, int (*cb)(X509_STORE_CTX *,
    void *), void *arg)
{
	ctx->app_verify_callback = cb;
	ctx->app_verify_arg = arg;
}

void
SSL_CTX_set_verify(SSL_CTX *ctx, int mode, int (*cb)(int, X509_STORE_CTX *))
{
	ctx->verify_mode = mode;
	ctx->default_verify_callback = cb;
}

void
SSL_CTX_set_verify_depth(SSL_CTX *ctx, int depth)
{
	X509_VERIFY_PARAM_set_depth(ctx->param, depth);
}

void
ssl_set_cert_masks(CERT *c, const SSL_CIPHER *cipher)
{
	CERT_PKEY	*cpk;
	int		 rsa_enc, rsa_tmp, rsa_sign, dh_tmp, dh_rsa, dh_dsa, dsa_sign;
	int		 rsa_enc_export, dh_rsa_export, dh_dsa_export;
	int		 rsa_tmp_export, dh_tmp_export, kl;
	unsigned long	 mask_k, mask_a, emask_k, emask_a;
	int		 have_ecc_cert, ecdh_ok, ecdsa_ok, ecc_pkey_size;
#ifndef OPENSSL_NO_ECDH
	int		 have_ecdh_tmp;
#endif
	X509		*x = NULL;
	EVP_PKEY	*ecc_pkey = NULL;
	int		 signature_nid = 0, pk_nid = 0, md_nid = 0;

	if (c == NULL)
		return;

	kl = SSL_C_EXPORT_PKEYLENGTH(cipher);

	rsa_tmp = (c->rsa_tmp != NULL || c->rsa_tmp_cb != NULL);
	rsa_tmp_export = (c->rsa_tmp_cb != NULL ||
	(rsa_tmp && RSA_size(c->rsa_tmp)*8 <= kl));
#ifndef OPENSSL_NO_DH
	dh_tmp = (c->dh_tmp != NULL || c->dh_tmp_cb != NULL);
	dh_tmp_export = (c->dh_tmp_cb != NULL ||
	(dh_tmp && DH_size(c->dh_tmp)*8 <= kl));
#else
	dh_tmp = dh_tmp_export = 0;
#endif

#ifndef OPENSSL_NO_ECDH
	have_ecdh_tmp = (c->ecdh_tmp != NULL || c->ecdh_tmp_cb != NULL);
#endif
	cpk = &(c->pkeys[SSL_PKEY_RSA_ENC]);
	rsa_enc = (cpk->x509 != NULL && cpk->privatekey != NULL);
	rsa_enc_export = (rsa_enc && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
	cpk = &(c->pkeys[SSL_PKEY_RSA_SIGN]);
	rsa_sign = (cpk->x509 != NULL && cpk->privatekey != NULL);
	cpk = &(c->pkeys[SSL_PKEY_DSA_SIGN]);
	dsa_sign = (cpk->x509 != NULL && cpk->privatekey != NULL);
	cpk = &(c->pkeys[SSL_PKEY_DH_RSA]);
	dh_rsa = (cpk->x509 != NULL && cpk->privatekey != NULL);
	dh_rsa_export = (dh_rsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
	cpk = &(c->pkeys[SSL_PKEY_DH_DSA]);
/* FIX THIS EAY EAY EAY */
	dh_dsa = (cpk->x509 != NULL && cpk->privatekey != NULL);
	dh_dsa_export = (dh_dsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
	cpk = &(c->pkeys[SSL_PKEY_ECC]);
	have_ecc_cert = (cpk->x509 != NULL && cpk->privatekey != NULL);
	mask_k = 0;
	mask_a = 0;
	emask_k = 0;
	emask_a = 0;




	cpk = &(c->pkeys[SSL_PKEY_GOST01]);
	if (cpk->x509 != NULL && cpk->privatekey !=NULL) {
		mask_k |= SSL_kGOST;
		mask_a |= SSL_aGOST01;
	}
	cpk = &(c->pkeys[SSL_PKEY_GOST94]);
	if (cpk->x509 != NULL && cpk->privatekey !=NULL) {
		mask_k |= SSL_kGOST;
		mask_a |= SSL_aGOST94;
	}

	if (rsa_enc || (rsa_tmp && rsa_sign))
		mask_k|=SSL_kRSA;
	if (rsa_enc_export || (rsa_tmp_export && (rsa_sign || rsa_enc)))
		emask_k|=SSL_kRSA;

#if 0
	/* The match needs to be both kEDH and aRSA or aDSA, so don't worry */
	if ((dh_tmp || dh_rsa || dh_dsa) &&
		(rsa_enc || rsa_sign || dsa_sign))
	mask_k|=SSL_kEDH;
	if ((dh_tmp_export || dh_rsa_export || dh_dsa_export) &&
		(rsa_enc || rsa_sign || dsa_sign))
	emask_k|=SSL_kEDH;
#endif

	if (dh_tmp_export)
		emask_k|=SSL_kEDH;

	if (dh_tmp)
		mask_k|=SSL_kEDH;

	if (dh_rsa)
		mask_k|=SSL_kDHr;
	if (dh_rsa_export)
		emask_k|=SSL_kDHr;

	if (dh_dsa)
		mask_k|=SSL_kDHd;
	if (dh_dsa_export)
		emask_k|=SSL_kDHd;

	if (rsa_enc || rsa_sign) {
		mask_a|=SSL_aRSA;
		emask_a|=SSL_aRSA;
	}

	if (dsa_sign) {
		mask_a|=SSL_aDSS;
		emask_a|=SSL_aDSS;
	}

	mask_a|=SSL_aNULL;
	emask_a|=SSL_aNULL;


	/*
	 * An ECC certificate may be usable for ECDH and/or
	 * ECDSA cipher suites depending on the key usage extension.
	 */
	if (have_ecc_cert) {
		/* This call populates extension flags (ex_flags) */
		x = (c->pkeys[SSL_PKEY_ECC]).x509;
		X509_check_purpose(x, -1, 0);
		ecdh_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
		(x->ex_kusage & X509v3_KU_KEY_AGREEMENT) : 1;
		ecdsa_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
		(x->ex_kusage & X509v3_KU_DIGITAL_SIGNATURE) : 1;
		ecc_pkey = X509_get_pubkey(x);
		ecc_pkey_size = (ecc_pkey != NULL) ?
		EVP_PKEY_bits(ecc_pkey) : 0;
		EVP_PKEY_free(ecc_pkey);
		if ((x->sig_alg) && (x->sig_alg->algorithm)) {
			signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
			OBJ_find_sigid_algs(signature_nid, &md_nid, &pk_nid);
		}
#ifndef OPENSSL_NO_ECDH
		if (ecdh_ok) {

			if (pk_nid == NID_rsaEncryption || pk_nid == NID_rsa) {
				mask_k|=SSL_kECDHr;
				mask_a|=SSL_aECDH;
				if (ecc_pkey_size <= 163) {
					emask_k|=SSL_kECDHr;
					emask_a|=SSL_aECDH;
				}
			}

			if (pk_nid == NID_X9_62_id_ecPublicKey) {
				mask_k|=SSL_kECDHe;
				mask_a|=SSL_aECDH;
				if (ecc_pkey_size <= 163) {
					emask_k|=SSL_kECDHe;
					emask_a|=SSL_aECDH;
				}
			}
		}
#endif
#ifndef OPENSSL_NO_ECDSA
		if (ecdsa_ok) {
			mask_a|=SSL_aECDSA;
			emask_a|=SSL_aECDSA;
		}
#endif
	}

#ifndef OPENSSL_NO_ECDH
	if (have_ecdh_tmp) {
		mask_k|=SSL_kEECDH;
		emask_k|=SSL_kEECDH;
	}
#endif

#ifndef OPENSSL_NO_PSK
	mask_k |= SSL_kPSK;
	mask_a |= SSL_aPSK;
	emask_k |= SSL_kPSK;
	emask_a |= SSL_aPSK;
#endif

	c->mask_k = mask_k;
	c->mask_a = mask_a;
	c->export_mask_k = emask_k;
	c->export_mask_a = emask_a;
	c->valid = 1;
}

/* This handy macro borrowed from crypto/x509v3/v3_purp.c */
#define ku_reject(x, usage) \
	(((x)->ex_flags & EXFLAG_KUSAGE) && !((x)->ex_kusage & (usage)))

#ifndef OPENSSL_NO_EC

int
ssl_check_srvr_ecc_cert_and_alg(X509 *x, SSL *s)
{
	unsigned long		 alg_k, alg_a;
	EVP_PKEY		*pkey = NULL;
	int			 keysize = 0;
	int			 signature_nid = 0, md_nid = 0, pk_nid = 0;
	const SSL_CIPHER	*cs = s->s3->tmp.new_cipher;

	alg_k = cs->algorithm_mkey;
	alg_a = cs->algorithm_auth;

	if (SSL_C_IS_EXPORT(cs)) {
		/* ECDH key length in export ciphers must be <= 163 bits */
		pkey = X509_get_pubkey(x);
		if (pkey == NULL)
			return (0);
		keysize = EVP_PKEY_bits(pkey);
		EVP_PKEY_free(pkey);
		if (keysize > 163)
			return (0);
	}

	/* This call populates the ex_flags field correctly */
	X509_check_purpose(x, -1, 0);
	if ((x->sig_alg) && (x->sig_alg->algorithm)) {
		signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
		OBJ_find_sigid_algs(signature_nid, &md_nid, &pk_nid);
	}
	if (alg_k & SSL_kECDHe || alg_k & SSL_kECDHr) {
		/* key usage, if present, must allow key agreement */
		if (ku_reject(x, X509v3_KU_KEY_AGREEMENT)) {
			SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG,
			    SSL_R_ECC_CERT_NOT_FOR_KEY_AGREEMENT);
			return (0);
		}
		if ((alg_k & SSL_kECDHe) && TLS1_get_version(s) <
		    TLS1_2_VERSION) {
			/* signature alg must be ECDSA */
			if (pk_nid != NID_X9_62_id_ecPublicKey) {
				SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG,
				    SSL_R_ECC_CERT_SHOULD_HAVE_SHA1_SIGNATURE);
				return (0);
			}
		}
		if ((alg_k & SSL_kECDHr) && TLS1_get_version(s) <
		    TLS1_2_VERSION) {
			/* signature alg must be RSA */
			if (pk_nid != NID_rsaEncryption && pk_nid != NID_rsa) {
				SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG,
				    SSL_R_ECC_CERT_SHOULD_HAVE_RSA_SIGNATURE);
				return (0);
			}
		}
	}
	if (alg_a & SSL_aECDSA) {
		/* key usage, if present, must allow signing */
		if (ku_reject(x, X509v3_KU_DIGITAL_SIGNATURE)) {
			SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG,
			    SSL_R_ECC_CERT_NOT_FOR_SIGNING);
			return (0);
		}
	}

	return (1);
	/* all checks are ok */
}

#endif

/* THIS NEEDS CLEANING UP */
CERT_PKEY *
ssl_get_server_send_pkey(const SSL *s)
{
	unsigned long	 alg_k, alg_a;
	CERT		*c;
	int		 i;

	c = s->cert;
	ssl_set_cert_masks(c, s->s3->tmp.new_cipher);

	alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
	alg_a = s->s3->tmp.new_cipher->algorithm_auth;

	if (alg_k & (SSL_kECDHr|SSL_kECDHe)) {
		/*
		 * We don't need to look at SSL_kEECDH
		 * since no certificate is needed for
		 * anon ECDH and for authenticated
		 * EECDH, the check for the auth
		 * algorithm will set i correctly
		 * NOTE: For ECDH-RSA, we need an ECC
		 * not an RSA cert but for EECDH-RSA
		 * we need an RSA cert. Placing the
		 * checks for SSL_kECDH before RSA
		 * checks ensures the correct cert is chosen.
		 */
		i = SSL_PKEY_ECC;
	} else if (alg_a & SSL_aECDSA) {
		i = SSL_PKEY_ECC;
	} else if (alg_k & SSL_kDHr)
		i = SSL_PKEY_DH_RSA;
	else if (alg_k & SSL_kDHd)
		i = SSL_PKEY_DH_DSA;
	else if (alg_a & SSL_aDSS)
		i = SSL_PKEY_DSA_SIGN;
	else if (alg_a & SSL_aRSA) {
		if (c->pkeys[SSL_PKEY_RSA_ENC].x509 == NULL)
			i = SSL_PKEY_RSA_SIGN;
		else
			i = SSL_PKEY_RSA_ENC;
	} else if (alg_a & SSL_aKRB5) {
		/* VRS something else here? */
		return (NULL);
	} else if (alg_a & SSL_aGOST94)
		i = SSL_PKEY_GOST94;
	else if (alg_a & SSL_aGOST01)
		i = SSL_PKEY_GOST01;
	else { /* if (alg_a & SSL_aNULL) */
		SSLerr(SSL_F_SSL_GET_SERVER_SEND_PKEY,
		    ERR_R_INTERNAL_ERROR);
		return (NULL);
	}

	return (c->pkeys + i);
}

X509 *
ssl_get_server_send_cert(const SSL *s)
{
	CERT_PKEY	*cpk;

	cpk = ssl_get_server_send_pkey(s);
	if (!cpk)
		return (NULL);
	return (cpk->x509);
}

EVP_PKEY *
ssl_get_sign_pkey(SSL *s, const SSL_CIPHER *cipher, const EVP_MD **pmd)
{
	unsigned long	 alg_a;
	CERT		*c;
	int		 idx = -1;

	alg_a = cipher->algorithm_auth;
	c = s->cert;

	if ((alg_a & SSL_aDSS) &&
	    (c->pkeys[SSL_PKEY_DSA_SIGN].privatekey != NULL))
		idx = SSL_PKEY_DSA_SIGN;
	else if (alg_a & SSL_aRSA) {
		if (c->pkeys[SSL_PKEY_RSA_SIGN].privatekey != NULL)
			idx = SSL_PKEY_RSA_SIGN;
		else if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey != NULL)
			idx = SSL_PKEY_RSA_ENC;
	} else if ((alg_a & SSL_aECDSA) &&
	    (c->pkeys[SSL_PKEY_ECC].privatekey != NULL))
		idx = SSL_PKEY_ECC;
	if (idx == -1) {
		SSLerr(SSL_F_SSL_GET_SIGN_PKEY,
		    ERR_R_INTERNAL_ERROR);
		return (NULL);
	}
	if (pmd)
		*pmd = c->pkeys[idx].digest;
	return (c->pkeys[idx].privatekey);
}

void
ssl_update_cache(SSL *s, int mode)
{
	int	i;

	/*
	 * If the session_id_length is 0, we are not supposed to cache it,
	 * and it would be rather hard to do anyway :-)
	 */
	if (s->session->session_id_length == 0)
		return;

	i = s->session_ctx->session_cache_mode;
	if ((i & mode) && (!s->hit) && ((i & SSL_SESS_CACHE_NO_INTERNAL_STORE)
	    || SSL_CTX_add_session(s->session_ctx, s->session))
	    && (s->session_ctx->new_session_cb != NULL)) {
		CRYPTO_add(&s->session->references, 1, CRYPTO_LOCK_SSL_SESSION);
		if (!s->session_ctx->new_session_cb(s, s->session))
			SSL_SESSION_free(s->session);
	}

	/* auto flush every 255 connections */
	if ((!(i & SSL_SESS_CACHE_NO_AUTO_CLEAR)) &&
	    ((i & mode) == mode)) {
		if ((((mode & SSL_SESS_CACHE_CLIENT) ?
		    s->session_ctx->stats.sess_connect_good :
		    s->session_ctx->stats.sess_accept_good) & 0xff) == 0xff) {
			SSL_CTX_flush_sessions(s->session_ctx, time(NULL));
		}
	}
}

const SSL_METHOD *
SSL_get_ssl_method(SSL *s)
{
	return (s->method);
}

int
SSL_set_ssl_method(SSL *s, const SSL_METHOD *meth)
{
	int	conn = -1;
	int	ret = 1;

	if (s->method != meth) {
		if (s->handshake_func != NULL)
			conn = (s->handshake_func == s->method->ssl_connect);

		if (s->method->version == meth->version)
			s->method = meth;
		else {
			s->method->ssl_free(s);
			s->method = meth;
			ret = s->method->ssl_new(s);
		}

		if (conn == 1)
			s->handshake_func = meth->ssl_connect;
		else if (conn == 0)
			s->handshake_func = meth->ssl_accept;
	}
	return (ret);
}

int
SSL_get_error(const SSL *s, int i)
{
	int		 reason;
	unsigned long	 l;
	BIO		*bio;

	if (i > 0)
		return (SSL_ERROR_NONE);

	/* Make things return SSL_ERROR_SYSCALL when doing SSL_do_handshake
	 * etc, where we do encode the error */
	if ((l = ERR_peek_error()) != 0) {
		if (ERR_GET_LIB(l) == ERR_LIB_SYS)
			return (SSL_ERROR_SYSCALL);
		else
			return (SSL_ERROR_SSL);
	}

	if ((i < 0) && SSL_want_read(s)) {
		bio = SSL_get_rbio(s);
		if (BIO_should_read(bio))
			return (SSL_ERROR_WANT_READ);
		else if (BIO_should_write(bio))
			/*
			 * This one doesn't make too much sense...  We never
			 * try to write to the rbio, and an application
			 * program where rbio and wbio are separate couldn't
			 * even know what it should wait for.  However if we
			 * ever set s->rwstate incorrectly (so that we have
			 * SSL_want_read(s) instead of SSL_want_write(s))
			 * and rbio and wbio *are* the same, this test works
			 * around that bug; so it might be safer to keep it.
			 */
		return (SSL_ERROR_WANT_WRITE);
		else if (BIO_should_io_special(bio)) {
			reason = BIO_get_retry_reason(bio);
			if (reason == BIO_RR_CONNECT)
				return (SSL_ERROR_WANT_CONNECT);
			else if (reason == BIO_RR_ACCEPT)
				return (SSL_ERROR_WANT_ACCEPT);
			else
				return (SSL_ERROR_SYSCALL); /* unknown */
		}
	}

	if ((i < 0) && SSL_want_write(s)) {
		bio = SSL_get_wbio(s);
		if (BIO_should_write(bio))
			return (SSL_ERROR_WANT_WRITE);
		else if (BIO_should_read(bio)) {
			/*
			 * See above (SSL_want_read(s) with
			 * BIO_should_write(bio))
			 */
			return (SSL_ERROR_WANT_READ);
		} else if (BIO_should_io_special(bio)) {
			reason = BIO_get_retry_reason(bio);
			if (reason == BIO_RR_CONNECT)
				return (SSL_ERROR_WANT_CONNECT);
			else if (reason == BIO_RR_ACCEPT)
				return (SSL_ERROR_WANT_ACCEPT);
			else
				return (SSL_ERROR_SYSCALL);
		}
	}
	if ((i < 0) && SSL_want_x509_lookup(s)) {
		return (SSL_ERROR_WANT_X509_LOOKUP);
	}

	if (i == 0) {
		if ((s->shutdown & SSL_RECEIVED_SHUTDOWN) &&
		    (s->s3->warn_alert == SSL_AD_CLOSE_NOTIFY))
		return (SSL_ERROR_ZERO_RETURN);
	}
	return (SSL_ERROR_SYSCALL);
}

int
SSL_do_handshake(SSL *s)
{
	int	ret = 1;

	if (s->handshake_func == NULL) {
		SSLerr(SSL_F_SSL_DO_HANDSHAKE,
		    SSL_R_CONNECTION_TYPE_NOT_SET);
		return (-1);
	}

	s->method->ssl_renegotiate_check(s);

	if (SSL_in_init(s) || SSL_in_before(s)) {
		ret = s->handshake_func(s);
	}
	return (ret);
}

/*
 * For the next 2 functions, SSL_clear() sets shutdown and so
 * one of these calls will reset it
 */
void
SSL_set_accept_state(SSL *s)
{
	s->server = 1;
	s->shutdown = 0;
	s->state = SSL_ST_ACCEPT|SSL_ST_BEFORE;
	s->handshake_func = s->method->ssl_accept;
	/* clear the current cipher */
	ssl_clear_cipher_ctx(s);
	ssl_clear_hash_ctx(&s->read_hash);
	ssl_clear_hash_ctx(&s->write_hash);
}

void
SSL_set_connect_state(SSL *s)
{
	s->server = 0;
	s->shutdown = 0;
	s->state = SSL_ST_CONNECT|SSL_ST_BEFORE;
	s->handshake_func = s->method->ssl_connect;
	/* clear the current cipher */
	ssl_clear_cipher_ctx(s);
	ssl_clear_hash_ctx(&s->read_hash);
	ssl_clear_hash_ctx(&s->write_hash);
}

int
ssl_undefined_function(SSL *s)
{
	SSLerr(SSL_F_SSL_UNDEFINED_FUNCTION,
	    ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
	return (0);
}

int
ssl_undefined_void_function(void)
{
	SSLerr(SSL_F_SSL_UNDEFINED_VOID_FUNCTION,
	    ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
	return (0);
}

int
ssl_undefined_const_function(const SSL *s)
{
	SSLerr(SSL_F_SSL_UNDEFINED_CONST_FUNCTION,
	    ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
	return (0);
}

SSL_METHOD *
ssl_bad_method(int ver)
{
	SSLerr(SSL_F_SSL_BAD_METHOD,
	    ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
	return (NULL);
}

const char *
SSL_get_version(const SSL *s)
{
	if (s->version == TLS1_2_VERSION)
		return ("TLSv1.2");
	else if (s->version == TLS1_1_VERSION)
		return ("TLSv1.1");
	else if (s->version == TLS1_VERSION)
		return ("TLSv1");
	else if (s->version == SSL3_VERSION)
		return ("SSLv3");
	else
		return ("unknown");
}

SSL *
SSL_dup(SSL *s)
{
	STACK_OF(X509_NAME) *sk;
	X509_NAME *xn;
	SSL *ret;
	int i;

	if ((ret = SSL_new(SSL_get_SSL_CTX(s))) == NULL)
		return (NULL);

	ret->version = s->version;
	ret->type = s->type;
	ret->method = s->method;

	if (s->session != NULL) {
		/* This copies session-id, SSL_METHOD, sid_ctx, and 'cert' */
		SSL_copy_session_id(ret, s);
	} else {
		/*
		 * No session has been established yet, so we have to expect
		 * that s->cert or ret->cert will be changed later --
		 * they should not both point to the same object,
		 * and thus we can't use SSL_copy_session_id.
		 */

		ret->method->ssl_free(ret);
		ret->method = s->method;
		ret->method->ssl_new(ret);

		if (s->cert != NULL) {
			if (ret->cert != NULL) {
				ssl_cert_free(ret->cert);
			}
			ret->cert = ssl_cert_dup(s->cert);
			if (ret->cert == NULL)
				goto err;
		}

		SSL_set_session_id_context(ret,
		s->sid_ctx, s->sid_ctx_length);
	}

	ret->options = s->options;
	ret->mode = s->mode;
	SSL_set_max_cert_list(ret, SSL_get_max_cert_list(s));
	SSL_set_read_ahead(ret, SSL_get_read_ahead(s));
	ret->msg_callback = s->msg_callback;
	ret->msg_callback_arg = s->msg_callback_arg;
	SSL_set_verify(ret, SSL_get_verify_mode(s),
	SSL_get_verify_callback(s));
	SSL_set_verify_depth(ret, SSL_get_verify_depth(s));
	ret->generate_session_id = s->generate_session_id;

	SSL_set_info_callback(ret, SSL_get_info_callback(s));

	ret->debug = s->debug;

	/* copy app data, a little dangerous perhaps */
	if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_SSL,
	    &ret->ex_data, &s->ex_data))
		goto err;

	/* setup rbio, and wbio */
	if (s->rbio != NULL) {
		if (!BIO_dup_state(s->rbio,(char *)&ret->rbio))
			goto err;
	}
	if (s->wbio != NULL) {
		if (s->wbio != s->rbio) {
			if (!BIO_dup_state(s->wbio,(char *)&ret->wbio))
				goto err;
		} else
			ret->wbio = ret->rbio;
	}
	ret->rwstate = s->rwstate;
	ret->in_handshake = s->in_handshake;
	ret->handshake_func = s->handshake_func;
	ret->server = s->server;
	ret->renegotiate = s->renegotiate;
	ret->new_session = s->new_session;
	ret->quiet_shutdown = s->quiet_shutdown;
	ret->shutdown = s->shutdown;
	/* SSL_dup does not really work at any state, though */
	ret->state=s->state;
	ret->rstate = s->rstate;

	/*
	 * Would have to copy ret->init_buf, ret->init_msg, ret->init_num,
	 * ret->init_off
	 */
	ret->init_num = 0;

	ret->hit = s->hit;

	X509_VERIFY_PARAM_inherit(ret->param, s->param);

	/* dup the cipher_list and cipher_list_by_id stacks */
	if (s->cipher_list != NULL) {
		if ((ret->cipher_list =
		    sk_SSL_CIPHER_dup(s->cipher_list)) == NULL)
			goto err;
	}
	if (s->cipher_list_by_id != NULL) {
		if ((ret->cipher_list_by_id =
		    sk_SSL_CIPHER_dup(s->cipher_list_by_id)) == NULL)
			goto err;
	}

	/* Dup the client_CA list */
	if (s->client_CA != NULL) {
		if ((sk = sk_X509_NAME_dup(s->client_CA)) == NULL) goto err;
			ret->client_CA = sk;
		for (i = 0; i < sk_X509_NAME_num(sk); i++) {
			xn = sk_X509_NAME_value(sk, i);
			if (sk_X509_NAME_set(sk, i,
			    X509_NAME_dup(xn)) == NULL) {
				X509_NAME_free(xn);
				goto err;
			}
		}
	}

	if (0) {
 err:
		if (ret != NULL)
			SSL_free(ret);
		ret = NULL;
	}
	return (ret);
}

void
ssl_clear_cipher_ctx(SSL *s)
{
	if (s->enc_read_ctx != NULL) {
		EVP_CIPHER_CTX_cleanup(s->enc_read_ctx);
		free(s->enc_read_ctx);
		s->enc_read_ctx = NULL;
	}
	if (s->enc_write_ctx != NULL) {
		EVP_CIPHER_CTX_cleanup(s->enc_write_ctx);
		free(s->enc_write_ctx);
		s->enc_write_ctx = NULL;
	}
#ifndef OPENSSL_NO_COMP
	if (s->expand != NULL) {
		COMP_CTX_free(s->expand);
		s->expand = NULL;
	}
	if (s->compress != NULL) {
		COMP_CTX_free(s->compress);
		s->compress = NULL;
	}
#endif
}

/* Fix this function so that it takes an optional type parameter */
X509 *
SSL_get_certificate(const SSL *s)
{
	if (s->cert != NULL)
		return (s->cert->key->x509);
	else
		return (NULL);
}

/* Fix this function so that it takes an optional type parameter */
EVP_PKEY *
SSL_get_privatekey(SSL *s)
{
	if (s->cert != NULL)
		return (s->cert->key->privatekey);
	else
		return (NULL);
}

const SSL_CIPHER *
SSL_get_current_cipher(const SSL *s)
{
	if ((s->session != NULL) && (s->session->cipher != NULL))
		return (s->session->cipher);
	return (NULL);
}
#ifdef OPENSSL_NO_COMP
const void *
SSL_get_current_compression(SSL *s)
{
	return (NULL);
}

const void *
SSL_get_current_expansion(SSL *s)
{
	return (NULL);
}
#else

const COMP_METHOD *
SSL_get_current_compression(SSL *s)
{
	if (s->compress != NULL)
		return (s->compress->meth);
	return (NULL);
}

const COMP_METHOD *
SSL_get_current_expansion(SSL *s)
{
	if (s->expand != NULL)
		return (s->expand->meth);
	return (NULL);
}
#endif

int
ssl_init_wbio_buffer(SSL *s, int push)
{
	BIO	*bbio;

	if (s->bbio == NULL) {
		bbio = BIO_new(BIO_f_buffer());
		if (bbio == NULL)
			return (0);
		s->bbio = bbio;
	} else {
		bbio = s->bbio;
		if (s->bbio == s->wbio)
			s->wbio = BIO_pop(s->wbio);
	}
	(void)BIO_reset(bbio);
/*	if (!BIO_set_write_buffer_size(bbio,16*1024)) */
	if (!BIO_set_read_buffer_size(bbio, 1)) {
		SSLerr(SSL_F_SSL_INIT_WBIO_BUFFER,
		    ERR_R_BUF_LIB);
		return (0);
	}
	if (push) {
		if (s->wbio != bbio)
			s->wbio = BIO_push(bbio, s->wbio);
	} else {
		if (s->wbio == bbio)
			s->wbio = BIO_pop(bbio);
	}
	return (1);
}

void
ssl_free_wbio_buffer(SSL *s)
{
	if (s->bbio == NULL)
		return;

	if (s->bbio == s->wbio) {
		/* remove buffering */
		s->wbio = BIO_pop(s->wbio);
	}
	BIO_free(s->bbio);
	s->bbio = NULL;
}

void
SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx, int mode)
{
	ctx->quiet_shutdown = mode;
}

int
SSL_CTX_get_quiet_shutdown(const SSL_CTX *ctx)
{
	return (ctx->quiet_shutdown);
}

void
SSL_set_quiet_shutdown(SSL *s, int mode)
{
	s->quiet_shutdown = mode;
}

int
SSL_get_quiet_shutdown(const SSL *s)
{
	return (s->quiet_shutdown);
}

void
SSL_set_shutdown(SSL *s, int mode)
{
	s->shutdown = mode;
}

int
SSL_get_shutdown(const SSL *s)
{
	return (s->shutdown);
}

int
SSL_version(const SSL *s)
{
	return (s->version);
}

SSL_CTX *
SSL_get_SSL_CTX(const SSL *ssl)
{
	return (ssl->ctx);
}

SSL_CTX *
SSL_set_SSL_CTX(SSL *ssl, SSL_CTX* ctx)
{
	if (ssl->ctx == ctx)
		return (ssl->ctx);
#ifndef OPENSSL_NO_TLSEXT
	if (ctx == NULL)
		ctx = ssl->initial_ctx;
#endif
	if (ssl->cert != NULL)
		ssl_cert_free(ssl->cert);
	ssl->cert = ssl_cert_dup(ctx->cert);
	CRYPTO_add(&ctx->references, 1, CRYPTO_LOCK_SSL_CTX);
	if (ssl->ctx != NULL)
		SSL_CTX_free(ssl->ctx); /* decrement reference count */
	ssl->ctx = ctx;
	return (ssl->ctx);
}

#ifndef OPENSSL_NO_STDIO
int
SSL_CTX_set_default_verify_paths(SSL_CTX *ctx)
{
	return (X509_STORE_set_default_paths(ctx->cert_store));
}

int
SSL_CTX_load_verify_locations(SSL_CTX *ctx, const char *CAfile,
    const char *CApath)
{
	return (X509_STORE_load_locations(ctx->cert_store, CAfile, CApath));
}
#endif

void
SSL_set_info_callback(SSL *ssl,
    void (*cb)(const SSL *ssl, int type, int val))
{
	ssl->info_callback = cb;
}

void (*SSL_get_info_callback(const SSL *ssl))(const SSL *ssl, int type, int val)
{
	return (ssl->info_callback);
}

int
SSL_state(const SSL *ssl)
{
	return (ssl->state);
}

void
SSL_set_state(SSL *ssl, int state)
{
	ssl->state = state;
}

void
SSL_set_verify_result(SSL *ssl, long arg)
{
	ssl->verify_result = arg;
}

long
SSL_get_verify_result(const SSL *ssl)
{
	return (ssl->verify_result);
}

int
SSL_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
    CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func)
{
	return (CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL, argl, argp,
	    new_func, dup_func, free_func));
}

int
SSL_set_ex_data(SSL *s, int idx, void *arg)
{
	return (CRYPTO_set_ex_data(&s->ex_data, idx, arg));
}

void *
SSL_get_ex_data(const SSL *s, int idx)
{
	return (CRYPTO_get_ex_data(&s->ex_data, idx));
}

int
SSL_CTX_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
    CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func)
{
	return (CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL_CTX, argl, argp,
	    new_func, dup_func, free_func));
}

int
SSL_CTX_set_ex_data(SSL_CTX *s, int idx, void *arg)
{
	return (CRYPTO_set_ex_data(&s->ex_data, idx, arg));
}

void *
SSL_CTX_get_ex_data(const SSL_CTX *s, int idx)
{
	return (CRYPTO_get_ex_data(&s->ex_data, idx));
}

int
ssl_ok(SSL *s)
{
	return (1);
}

X509_STORE *
SSL_CTX_get_cert_store(const SSL_CTX *ctx)
{
	return (ctx->cert_store);
}

void
SSL_CTX_set_cert_store(SSL_CTX *ctx, X509_STORE *store)
{
	if (ctx->cert_store != NULL)
		X509_STORE_free(ctx->cert_store);
	ctx->cert_store = store;
}

int
SSL_want(const SSL *s)
{
	return (s->rwstate);
}

/*!
 * \brief Set the callback for generating temporary RSA keys.
 * \param ctx the SSL context.
 * \param cb the callback
 */

void
SSL_CTX_set_tmp_rsa_callback(SSL_CTX *ctx, RSA *(*cb)(SSL *ssl,
    int is_export,
int keylength))
{
	SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb);
}

void
SSL_set_tmp_rsa_callback(SSL *ssl, RSA *(*cb)(SSL *ssl,
    int is_export,
int keylength))
{
	SSL_callback_ctrl(ssl, SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb);
}

#ifdef DOXYGEN
/*!
 * \brief The RSA temporary key callback function.
 * \param ssl the SSL session.
 * \param is_export \c TRUE if the temp RSA key is for an export ciphersuite.
 * \param keylength if \c is_export is \c TRUE, then \c keylength is the size
 * of the required key in bits.
 * \return the temporary RSA key.
 * \sa SSL_CTX_set_tmp_rsa_callback, SSL_set_tmp_rsa_callback
 */

RSA *
cb(SSL *ssl, int is_export, int keylength)
{}
#endif

/*!
 * \brief Set the callback for generating temporary DH keys.
 * \param ctx the SSL context.
 * \param dh the callback
 */

#ifndef OPENSSL_NO_DH
void
SSL_CTX_set_tmp_dh_callback(SSL_CTX *ctx, DH *(*dh)(SSL *ssl, int is_export,
    int keylength))
{
	SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh);
}

void
SSL_set_tmp_dh_callback(SSL *ssl, DH *(*dh)(SSL *ssl, int is_export,
    int keylength))
{
	SSL_callback_ctrl(ssl, SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh);
}
#endif

#ifndef OPENSSL_NO_ECDH
void
SSL_CTX_set_tmp_ecdh_callback(SSL_CTX *ctx, EC_KEY *(*ecdh)(SSL *ssl,
    int is_export, int keylength))
{
	SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_TMP_ECDH_CB,
	    (void (*)(void))ecdh);
}

void
SSL_set_tmp_ecdh_callback(SSL *ssl, EC_KEY *(*ecdh)(SSL *ssl, int is_export,
    int keylength))
{
	SSL_callback_ctrl(ssl, SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh);
}
#endif

#ifndef OPENSSL_NO_PSK
int
SSL_CTX_use_psk_identity_hint(SSL_CTX *ctx, const char *identity_hint)
{
	if (identity_hint != NULL && strlen(identity_hint) >
	    PSK_MAX_IDENTITY_LEN) {
		SSLerr(SSL_F_SSL_CTX_USE_PSK_IDENTITY_HINT,
		    SSL_R_DATA_LENGTH_TOO_LONG);
		return (0);
	}
	free(ctx->psk_identity_hint);
	if (identity_hint != NULL) {
		ctx->psk_identity_hint = BUF_strdup(identity_hint);
		if (ctx->psk_identity_hint == NULL)
			return (0);
	} else
		ctx->psk_identity_hint = NULL;
	return (1);
}

int
SSL_use_psk_identity_hint(SSL *s, const char *identity_hint)
{
	if (s == NULL)
		return (0);

	if (s->session == NULL)
		return (1); /* session not created yet, ignored */

	if (identity_hint != NULL && strlen(identity_hint) >
	    PSK_MAX_IDENTITY_LEN) {
		SSLerr(SSL_F_SSL_USE_PSK_IDENTITY_HINT,
		    SSL_R_DATA_LENGTH_TOO_LONG);
		return (0);
	}
	free(s->session->psk_identity_hint);
	if (identity_hint != NULL) {
		s->session->psk_identity_hint = BUF_strdup(identity_hint);
		if (s->session->psk_identity_hint == NULL)
			return (0);
	} else
		s->session->psk_identity_hint = NULL;
	return (1);
}

const char *
SSL_get_psk_identity_hint(const SSL *s)
{
	if (s == NULL || s->session == NULL)
		return (NULL);
	return (s->session->psk_identity_hint);
}

const char *
SSL_get_psk_identity(const SSL *s)
{
	if (s == NULL || s->session == NULL)
		return (NULL);
	return (s->session->psk_identity);
}

void
SSL_set_psk_client_callback(SSL *s,
    unsigned int (*cb)(SSL *ssl, const char *hint,
    char *identity, unsigned int max_identity_len, unsigned char *psk,
    unsigned int max_psk_len))
{
	s->psk_client_callback = cb;
}

void
SSL_CTX_set_psk_client_callback(SSL_CTX *ctx,
    unsigned int (*cb)(SSL *ssl, const char *hint,
    char *identity, unsigned int max_identity_len, unsigned char *psk,
    unsigned int max_psk_len))
{
	ctx->psk_client_callback = cb;
}

void
SSL_set_psk_server_callback(SSL *s,
    unsigned int (*cb)(SSL *ssl, const char *identity,
    unsigned char *psk, unsigned int max_psk_len))
{
	s->psk_server_callback = cb;
}

void
SSL_CTX_set_psk_server_callback(SSL_CTX *ctx,
    unsigned int (*cb)(SSL *ssl, const char *identity,
    unsigned char *psk, unsigned int max_psk_len))
{
	ctx->psk_server_callback = cb;
}
#endif

void
SSL_CTX_set_msg_callback(SSL_CTX *ctx, void (*cb)(int write_p, int version,
    int content_type, const void *buf, size_t len, SSL *ssl, void *arg))
{
	SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_MSG_CALLBACK,
	    (void (*)(void))cb);
}

void
SSL_set_msg_callback(SSL *ssl, void (*cb)(int write_p, int version,
    int content_type, const void *buf, size_t len, SSL *ssl, void *arg))
{
	SSL_callback_ctrl(ssl, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
}

/*
 * Allocates new EVP_MD_CTX and sets pointer to it into given pointer
 * vairable, freeing  EVP_MD_CTX previously stored in that variable, if
 * any. If EVP_MD pointer is passed, initializes ctx with this md
 * Returns newly allocated ctx;
 */
EVP_MD_CTX *
ssl_replace_hash(EVP_MD_CTX **hash, const EVP_MD *md)
{
	ssl_clear_hash_ctx(hash);
	*hash = EVP_MD_CTX_create();
	if (*hash != NULL && md != NULL)
		EVP_DigestInit_ex(*hash, md, NULL);
	return (*hash);
}

void
ssl_clear_hash_ctx(EVP_MD_CTX **hash)
{
	if (*hash)
		EVP_MD_CTX_destroy(*hash);
	*hash = NULL;
}

void
SSL_set_debug(SSL *s, int debug)
{
	s->debug = debug;
}

int
SSL_cache_hit(SSL *s)
{
	return (s->hit);
}

IMPLEMENT_STACK_OF(SSL_CIPHER)
IMPLEMENT_STACK_OF(SSL_COMP)
IMPLEMENT_OBJ_BSEARCH_GLOBAL_CMP_FN(SSL_CIPHER, SSL_CIPHER,
    ssl_cipher_id);