DXR is a code search and navigation tool aimed at making sense of large projects. It supports full-text and regex searches as well as structural queries.

Mercurial (cdf352f02ac4)

VCS Links

Line Code
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
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

/*
 * Moved from secpkcs7.c
 */

#include "cert.h"
#include "certi.h"
#include "secder.h"
#include "secasn1.h"
#include "secoid.h"
#include "certdb.h"
#include "certxutl.h"
#include "prtime.h"
#include "secerr.h"
#include "pk11func.h"
#include "dev.h"
#include "dev3hack.h"
#include "nssbase.h"
#if defined(DPC_RWLOCK) || defined(GLOBAL_RWLOCK)
#include "nssrwlk.h"
#endif
#include "pk11priv.h"

const SEC_ASN1Template SEC_CERTExtensionTemplate[] = {
    { SEC_ASN1_SEQUENCE, 0, NULL, sizeof(CERTCertExtension) },
    { SEC_ASN1_OBJECT_ID, offsetof(CERTCertExtension, id) },
    { SEC_ASN1_OPTIONAL | SEC_ASN1_BOOLEAN, /* XXX DER_DEFAULT */
      offsetof(CERTCertExtension, critical) },
    { SEC_ASN1_OCTET_STRING, offsetof(CERTCertExtension, value) },
    { 0 }
};

static const SEC_ASN1Template SEC_CERTExtensionsTemplate[] = {
    { SEC_ASN1_SEQUENCE_OF, 0, SEC_CERTExtensionTemplate }
};

/*
 * XXX Also, these templates need to be tested; Lisa did the obvious
 * translation but they still should be verified.
 */

const SEC_ASN1Template CERT_IssuerAndSNTemplate[] = {
    { SEC_ASN1_SEQUENCE, 0, NULL, sizeof(CERTIssuerAndSN) },
    { SEC_ASN1_SAVE, offsetof(CERTIssuerAndSN, derIssuer) },
    { SEC_ASN1_INLINE, offsetof(CERTIssuerAndSN, issuer), CERT_NameTemplate },
    { SEC_ASN1_INTEGER, offsetof(CERTIssuerAndSN, serialNumber) },
    { 0 }
};

SEC_ASN1_MKSUB(SECOID_AlgorithmIDTemplate)
SEC_ASN1_MKSUB(CERT_TimeChoiceTemplate)

static const SEC_ASN1Template cert_CrlKeyTemplate[] = {
    { SEC_ASN1_SEQUENCE, 0, NULL, sizeof(CERTCrlKey) },
    { SEC_ASN1_INTEGER | SEC_ASN1_OPTIONAL, offsetof(CERTCrlKey, dummy) },
    { SEC_ASN1_SKIP },
    { SEC_ASN1_ANY, offsetof(CERTCrlKey, derName) },
    { SEC_ASN1_SKIP_REST },
    { 0 }
};

static const SEC_ASN1Template cert_CrlEntryTemplate[] = {
    { SEC_ASN1_SEQUENCE, 0, NULL, sizeof(CERTCrlEntry) },
    { SEC_ASN1_INTEGER, offsetof(CERTCrlEntry, serialNumber) },
    { SEC_ASN1_INLINE | SEC_ASN1_XTRN, offsetof(CERTCrlEntry, revocationDate),
      SEC_ASN1_SUB(CERT_TimeChoiceTemplate) },
    { SEC_ASN1_OPTIONAL | SEC_ASN1_SEQUENCE_OF,
      offsetof(CERTCrlEntry, extensions), SEC_CERTExtensionTemplate },
    { 0 }
};

const SEC_ASN1Template CERT_CrlTemplate[] = {
    { SEC_ASN1_SEQUENCE, 0, NULL, sizeof(CERTCrl) },
    { SEC_ASN1_INTEGER | SEC_ASN1_OPTIONAL, offsetof(CERTCrl, version) },
    { SEC_ASN1_INLINE | SEC_ASN1_XTRN, offsetof(CERTCrl, signatureAlg),
      SEC_ASN1_SUB(SECOID_AlgorithmIDTemplate) },
    { SEC_ASN1_SAVE, offsetof(CERTCrl, derName) },
    { SEC_ASN1_INLINE, offsetof(CERTCrl, name), CERT_NameTemplate },
    { SEC_ASN1_INLINE | SEC_ASN1_XTRN, offsetof(CERTCrl, lastUpdate),
      SEC_ASN1_SUB(CERT_TimeChoiceTemplate) },
    { SEC_ASN1_INLINE | SEC_ASN1_OPTIONAL | SEC_ASN1_XTRN,
      offsetof(CERTCrl, nextUpdate), SEC_ASN1_SUB(CERT_TimeChoiceTemplate) },
    { SEC_ASN1_OPTIONAL | SEC_ASN1_SEQUENCE_OF, offsetof(CERTCrl, entries),
      cert_CrlEntryTemplate },
    { SEC_ASN1_OPTIONAL | SEC_ASN1_CONSTRUCTED | SEC_ASN1_CONTEXT_SPECIFIC |
          SEC_ASN1_EXPLICIT | 0,
      offsetof(CERTCrl, extensions), SEC_CERTExtensionsTemplate },
    { 0 }
};

const SEC_ASN1Template CERT_CrlTemplateNoEntries[] = {
    { SEC_ASN1_SEQUENCE, 0, NULL, sizeof(CERTCrl) },
    { SEC_ASN1_INTEGER | SEC_ASN1_OPTIONAL, offsetof(CERTCrl, version) },
    { SEC_ASN1_INLINE | SEC_ASN1_XTRN, offsetof(CERTCrl, signatureAlg),
      SEC_ASN1_SUB(SECOID_AlgorithmIDTemplate) },
    { SEC_ASN1_SAVE, offsetof(CERTCrl, derName) },
    { SEC_ASN1_INLINE, offsetof(CERTCrl, name), CERT_NameTemplate },
    { SEC_ASN1_INLINE | SEC_ASN1_XTRN, offsetof(CERTCrl, lastUpdate),
      SEC_ASN1_SUB(CERT_TimeChoiceTemplate) },
    { SEC_ASN1_INLINE | SEC_ASN1_OPTIONAL | SEC_ASN1_XTRN,
      offsetof(CERTCrl, nextUpdate), SEC_ASN1_SUB(CERT_TimeChoiceTemplate) },
    { SEC_ASN1_OPTIONAL | SEC_ASN1_SEQUENCE_OF |
      SEC_ASN1_SKIP }, /* skip entries */
    { SEC_ASN1_OPTIONAL | SEC_ASN1_CONSTRUCTED | SEC_ASN1_CONTEXT_SPECIFIC |
          SEC_ASN1_EXPLICIT | 0,
      offsetof(CERTCrl, extensions), SEC_CERTExtensionsTemplate },
    { 0 }
};

const SEC_ASN1Template CERT_CrlTemplateEntriesOnly[] = {
    { SEC_ASN1_SEQUENCE, 0, NULL, sizeof(CERTCrl) },
    { SEC_ASN1_SKIP | SEC_ASN1_INTEGER | SEC_ASN1_OPTIONAL },
    { SEC_ASN1_SKIP },
    { SEC_ASN1_SKIP },
    { SEC_ASN1_SKIP | SEC_ASN1_INLINE | SEC_ASN1_XTRN,
      offsetof(CERTCrl, lastUpdate), SEC_ASN1_SUB(CERT_TimeChoiceTemplate) },
    { SEC_ASN1_SKIP | SEC_ASN1_INLINE | SEC_ASN1_OPTIONAL | SEC_ASN1_XTRN,
      offsetof(CERTCrl, nextUpdate), SEC_ASN1_SUB(CERT_TimeChoiceTemplate) },
    { SEC_ASN1_OPTIONAL | SEC_ASN1_SEQUENCE_OF, offsetof(CERTCrl, entries),
      cert_CrlEntryTemplate }, /* decode entries */
    { SEC_ASN1_SKIP_REST },
    { 0 }
};

const SEC_ASN1Template CERT_SignedCrlTemplate[] = {
    { SEC_ASN1_SEQUENCE, 0, NULL, sizeof(CERTSignedCrl) },
    { SEC_ASN1_SAVE, offsetof(CERTSignedCrl, signatureWrap.data) },
    { SEC_ASN1_INLINE, offsetof(CERTSignedCrl, crl), CERT_CrlTemplate },
    { SEC_ASN1_INLINE | SEC_ASN1_XTRN,
      offsetof(CERTSignedCrl, signatureWrap.signatureAlgorithm),
      SEC_ASN1_SUB(SECOID_AlgorithmIDTemplate) },
    { SEC_ASN1_BIT_STRING, offsetof(CERTSignedCrl, signatureWrap.signature) },
    { 0 }
};

static const SEC_ASN1Template cert_SignedCrlTemplateNoEntries[] = {
    { SEC_ASN1_SEQUENCE, 0, NULL, sizeof(CERTSignedCrl) },
    { SEC_ASN1_SAVE, offsetof(CERTSignedCrl, signatureWrap.data) },
    { SEC_ASN1_INLINE, offsetof(CERTSignedCrl, crl),
      CERT_CrlTemplateNoEntries },
    { SEC_ASN1_INLINE | SEC_ASN1_XTRN,
      offsetof(CERTSignedCrl, signatureWrap.signatureAlgorithm),
      SEC_ASN1_SUB(SECOID_AlgorithmIDTemplate) },
    { SEC_ASN1_BIT_STRING, offsetof(CERTSignedCrl, signatureWrap.signature) },
    { 0 }
};

const SEC_ASN1Template CERT_SetOfSignedCrlTemplate[] = {
    { SEC_ASN1_SET_OF, 0, CERT_SignedCrlTemplate },
};

/* get CRL version */
int
cert_get_crl_version(CERTCrl* crl)
{
    /* CRL version is defaulted to v1 */
    int version = SEC_CRL_VERSION_1;
    if (crl && crl->version.data != 0) {
        version = (int)DER_GetUInteger(&crl->version);
    }
    return version;
}

/* check the entries in the CRL */
SECStatus
cert_check_crl_entries(CERTCrl* crl)
{
    CERTCrlEntry** entries;
    CERTCrlEntry* entry;
    PRBool hasCriticalExten = PR_FALSE;
    SECStatus rv = SECSuccess;

    if (!crl) {
        return SECFailure;
    }

    if (crl->entries == NULL) {
        /* CRLs with no entries are valid */
        return (SECSuccess);
    }

    /* Look in the crl entry extensions.  If there is a critical extension,
       then the crl version must be v2; otherwise, it should be v1.
     */
    entries = crl->entries;
    while (*entries) {
        entry = *entries;
        if (entry->extensions) {
            /* If there is a critical extension in the entries, then the
               CRL must be of version 2.  If we already saw a critical
               extension,
               there is no need to check the version again.
            */
            if (hasCriticalExten == PR_FALSE) {
                hasCriticalExten = cert_HasCriticalExtension(entry->extensions);
                if (hasCriticalExten) {
                    if (cert_get_crl_version(crl) != SEC_CRL_VERSION_2) {
                        /* only CRL v2 critical extensions are supported */
                        PORT_SetError(SEC_ERROR_CRL_V1_CRITICAL_EXTENSION);
                        rv = SECFailure;
                        break;
                    }
                }
            }

            /* For each entry, make sure that it does not contain an unknown
               critical extension.  If it does, we must reject the CRL since
               we don't know how to process the extension.
            */
            if (cert_HasUnknownCriticalExten(entry->extensions) == PR_TRUE) {
                PORT_SetError(SEC_ERROR_CRL_UNKNOWN_CRITICAL_EXTENSION);
                rv = SECFailure;
                break;
            }
        }
        ++entries;
    }
    return (rv);
}

/* Check the version of the CRL.  If there is a critical extension in the crl
   or crl entry, then the version must be v2. Otherwise, it should be v1. If
   the crl contains critical extension(s), then we must recognized the
   extension's OID.
   */
SECStatus
cert_check_crl_version(CERTCrl* crl)
{
    PRBool hasCriticalExten = PR_FALSE;
    int version = cert_get_crl_version(crl);

    if (version > SEC_CRL_VERSION_2) {
        PORT_SetError(SEC_ERROR_CRL_INVALID_VERSION);
        return (SECFailure);
    }

    /* Check the crl extensions for a critial extension.  If one is found,
       and the version is not v2, then we are done.
     */
    if (crl->extensions) {
        hasCriticalExten = cert_HasCriticalExtension(crl->extensions);
        if (hasCriticalExten) {
            if (version != SEC_CRL_VERSION_2) {
                /* only CRL v2 critical extensions are supported */
                PORT_SetError(SEC_ERROR_CRL_V1_CRITICAL_EXTENSION);
                return (SECFailure);
            }
            /* make sure that there is no unknown critical extension */
            if (cert_HasUnknownCriticalExten(crl->extensions) == PR_TRUE) {
                PORT_SetError(SEC_ERROR_CRL_UNKNOWN_CRITICAL_EXTENSION);
                return (SECFailure);
            }
        }
    }

    return (SECSuccess);
}

/*
 * Generate a database key, based on the issuer name from a
 * DER crl.
 */
SECStatus
CERT_KeyFromDERCrl(PLArenaPool* arena, SECItem* derCrl, SECItem* key)
{
    SECStatus rv;
    CERTSignedData sd;
    CERTCrlKey crlkey;
    PLArenaPool* myArena;

    if (!arena) {
        /* arena needed for QuickDER */
        myArena = PORT_NewArena(DER_DEFAULT_CHUNKSIZE);
    } else {
        myArena = arena;
    }
    PORT_Memset(&sd, 0, sizeof(sd));
    rv = SEC_QuickDERDecodeItem(myArena, &sd, CERT_SignedDataTemplate, derCrl);
    if (SECSuccess == rv) {
        PORT_Memset(&crlkey, 0, sizeof(crlkey));
        rv = SEC_QuickDERDecodeItem(myArena, &crlkey, cert_CrlKeyTemplate,
                                    &sd.data);
    }

    /* make a copy so the data doesn't point to memory inside derCrl, which
       may be temporary */
    if (SECSuccess == rv) {
        rv = SECITEM_CopyItem(arena, key, &crlkey.derName);
    }

    if (myArena != arena) {
        PORT_FreeArena(myArena, PR_FALSE);
    }

    return rv;
}

#define GetOpaqueCRLFields(x) ((OpaqueCRLFields*)x->opaque)

SECStatus
CERT_CompleteCRLDecodeEntries(CERTSignedCrl* crl)
{
    SECStatus rv = SECSuccess;
    SECItem* crldata = NULL;
    OpaqueCRLFields* extended = NULL;

    if ((!crl) || (!(extended = (OpaqueCRLFields*)crl->opaque)) ||
        (PR_TRUE == extended->decodingError)) {
        rv = SECFailure;
    } else {
        if (PR_FALSE == extended->partial) {
            /* the CRL has already been fully decoded */
            return SECSuccess;
        }
        if (PR_TRUE == extended->badEntries) {
            /* the entries decoding already failed */
            return SECFailure;
        }
        crldata = &crl->signatureWrap.data;
        if (!crldata) {
            rv = SECFailure;
        }
    }

    if (SECSuccess == rv) {
        rv = SEC_QuickDERDecodeItem(crl->arena, &crl->crl,
                                    CERT_CrlTemplateEntriesOnly, crldata);
        if (SECSuccess == rv) {
            extended->partial = PR_FALSE; /* successful decode, avoid
                decoding again */
        } else {
            extended->decodingError = PR_TRUE;
            extended->badEntries = PR_TRUE;
            /* cache the decoding failure. If it fails the first time,
               it will fail again, which will grow the arena and leak
               memory, so we want to avoid it */
        }
        rv = cert_check_crl_entries(&crl->crl);
        if (rv != SECSuccess) {
            extended->badExtensions = PR_TRUE;
        }
    }
    return rv;
}

/*
 * take a DER CRL and decode it into a CRL structure
 * allow reusing the input DER without making a copy
 */
CERTSignedCrl*
CERT_DecodeDERCrlWithFlags(PLArenaPool* narena, SECItem* derSignedCrl, int type,
                           PRInt32 options)
{
    PLArenaPool* arena;
    CERTSignedCrl* crl;
    SECStatus rv;
    OpaqueCRLFields* extended = NULL;
    const SEC_ASN1Template* crlTemplate = CERT_SignedCrlTemplate;
    PRInt32 testOptions = options;

    PORT_Assert(derSignedCrl);
    if (!derSignedCrl) {
        PORT_SetError(SEC_ERROR_INVALID_ARGS);
        return NULL;
    }

    /* Adopting DER requires not copying it.  Code that sets ADOPT flag
     * but doesn't set DONT_COPY probably doesn't know What it is doing.
     * That condition is a programming error in the caller.
     */
    testOptions &= (CRL_DECODE_ADOPT_HEAP_DER | CRL_DECODE_DONT_COPY_DER);
    PORT_Assert(testOptions != CRL_DECODE_ADOPT_HEAP_DER);
    if (testOptions == CRL_DECODE_ADOPT_HEAP_DER) {
        PORT_SetError(SEC_ERROR_INVALID_ARGS);
        return NULL;
    }

    /* make a new arena if needed */
    if (narena == NULL) {
        arena = PORT_NewArena(DER_DEFAULT_CHUNKSIZE);
        if (!arena) {
            return NULL;
        }
    } else {
        arena = narena;
    }

    /* allocate the CRL structure */
    crl = (CERTSignedCrl*)PORT_ArenaZAlloc(arena, sizeof(CERTSignedCrl));
    if (!crl) {
        PORT_SetError(SEC_ERROR_NO_MEMORY);
        goto loser;
    }

    crl->arena = arena;

    /* allocate opaque fields */
    crl->opaque = (void*)PORT_ArenaZAlloc(arena, sizeof(OpaqueCRLFields));
    if (!crl->opaque) {
        goto loser;
    }
    extended = (OpaqueCRLFields*)crl->opaque;
    if (options & CRL_DECODE_ADOPT_HEAP_DER) {
        extended->heapDER = PR_TRUE;
    }
    if (options & CRL_DECODE_DONT_COPY_DER) {
        crl->derCrl = derSignedCrl; /* DER is not copied . The application
                                       must keep derSignedCrl until it
                                       destroys the CRL */
    } else {
        crl->derCrl = (SECItem*)PORT_ArenaZAlloc(arena, sizeof(SECItem));
        if (crl->derCrl == NULL) {
            goto loser;
        }
        rv = SECITEM_CopyItem(arena, crl->derCrl, derSignedCrl);
        if (rv != SECSuccess) {
            goto loser;
        }
    }

    /* Save the arena in the inner crl for CRL extensions support */
    crl->crl.arena = arena;
    if (options & CRL_DECODE_SKIP_ENTRIES) {
        crlTemplate = cert_SignedCrlTemplateNoEntries;
        extended->partial = PR_TRUE;
    }

    /* decode the CRL info */
    switch (type) {
        case SEC_CRL_TYPE:
            rv = SEC_QuickDERDecodeItem(arena, crl, crlTemplate, crl->derCrl);
            if (rv != SECSuccess) {
                extended->badDER = PR_TRUE;
                break;
            }
            /* check for critical extensions */
            rv = cert_check_crl_version(&crl->crl);
            if (rv != SECSuccess) {
                extended->badExtensions = PR_TRUE;
                break;
            }

            if (PR_TRUE == extended->partial) {
                /* partial decoding, don't verify entries */
                break;
            }

            rv = cert_check_crl_entries(&crl->crl);
            if (rv != SECSuccess) {
                extended->badExtensions = PR_TRUE;
            }

            break;

        default:
            PORT_SetError(SEC_ERROR_INVALID_ARGS);
            rv = SECFailure;
            break;
    }

    if (rv != SECSuccess) {
        goto loser;
    }

    crl->referenceCount = 1;

    return (crl);

loser:
    if (options & CRL_DECODE_KEEP_BAD_CRL) {
        if (extended) {
            extended->decodingError = PR_TRUE;
        }
        if (crl) {
            crl->referenceCount = 1;
            return (crl);
        }
    }

    if ((narena == NULL) && arena) {
        PORT_FreeArena(arena, PR_FALSE);
    }

    return (0);
}

/*
 * take a DER CRL and decode it into a CRL structure
 */
CERTSignedCrl*
CERT_DecodeDERCrl(PLArenaPool* narena, SECItem* derSignedCrl, int type)
{
    return CERT_DecodeDERCrlWithFlags(narena, derSignedCrl, type,
                                      CRL_DECODE_DEFAULT_OPTIONS);
}

/*
 * Lookup a CRL in the databases. We mirror the same fast caching data base
 *  caching stuff used by certificates....?
 * return values :
 *
 * SECSuccess means we got a valid decodable DER CRL, or no CRL at all.
 * Caller may distinguish those cases by the value returned in "decoded".
 * When DER CRL is not found, error code will be SEC_ERROR_CRL_NOT_FOUND.
 *
 * SECFailure means we got a fatal error - most likely, we found a CRL,
 * and it failed decoding, or there was an out of memory error. Do NOT ignore
 * it and specifically do NOT treat it the same as having no CRL, as this
 * can compromise security !!! Ideally, you should treat this case as if you
 * received a "catch-all" CRL where all certs you were looking up are
 * considered to be revoked
 */
static SECStatus
SEC_FindCrlByKeyOnSlot(PK11SlotInfo* slot, SECItem* crlKey, int type,
                       CERTSignedCrl** decoded, PRInt32 decodeoptions)
{
    SECStatus rv = SECSuccess;
    CERTSignedCrl* crl = NULL;
    SECItem* derCrl = NULL;
    CK_OBJECT_HANDLE crlHandle = 0;
    char* url = NULL;

    PORT_Assert(decoded);
    if (!decoded) {
        PORT_SetError(SEC_ERROR_INVALID_ARGS);
        return SECFailure;
    }

    derCrl = PK11_FindCrlByName(&slot, &crlHandle, crlKey, type, &url);
    if (derCrl == NULL) {
        /* if we had a problem other than the CRL just didn't exist, return
         * a failure to the upper level */
        int nsserror = PORT_GetError();
        if (nsserror != SEC_ERROR_CRL_NOT_FOUND) {
            rv = SECFailure;
        }
        goto loser;
    }
    PORT_Assert(crlHandle != CK_INVALID_HANDLE);
    /* PK11_FindCrlByName obtained a slot reference. */

    /* derCRL is a fresh HEAP copy made for us by PK11_FindCrlByName.
       Force adoption of the DER CRL from the heap - this will cause it
       to be automatically freed when SEC_DestroyCrl is invoked */
    decodeoptions |= (CRL_DECODE_ADOPT_HEAP_DER | CRL_DECODE_DONT_COPY_DER);

    crl = CERT_DecodeDERCrlWithFlags(NULL, derCrl, type, decodeoptions);
    if (crl) {
        crl->slot = slot;
        slot = NULL;   /* adopt it */
        derCrl = NULL; /* adopted by the crl struct */
        crl->pkcs11ID = crlHandle;
        if (url) {
            crl->url = PORT_ArenaStrdup(crl->arena, url);
        }
    } else {
        rv = SECFailure;
    }

    if (url) {
        PORT_Free(url);
    }

    if (slot) {
        PK11_FreeSlot(slot);
    }

loser:
    if (derCrl) {
        SECITEM_FreeItem(derCrl, PR_TRUE);
    }

    *decoded = crl;

    return rv;
}

CERTSignedCrl*
crl_storeCRL(PK11SlotInfo* slot, char* url, CERTSignedCrl* newCrl,
             SECItem* derCrl, int type)
{
    CERTSignedCrl *oldCrl = NULL, *crl = NULL;
    PRBool deleteOldCrl = PR_FALSE;
    CK_OBJECT_HANDLE crlHandle = CK_INVALID_HANDLE;

    PORT_Assert(newCrl);
    PORT_Assert(derCrl);
    PORT_Assert(type == SEC_CRL_TYPE);

    if (type != SEC_CRL_TYPE) {
        PORT_SetError(SEC_ERROR_INVALID_ARGS);
        return NULL;
    }

    /* we can't use the cache here because we must look in the same
       token */
    (void)SEC_FindCrlByKeyOnSlot(slot, &newCrl->crl.derName, type, &oldCrl,
                                 CRL_DECODE_SKIP_ENTRIES);
    /* if there is an old crl on the token, make sure the one we are
       installing is newer. If not, exit out, otherwise delete the
       old crl.
     */
    if (oldCrl != NULL) {
        /* if it's already there, quietly continue */
        if (SECITEM_CompareItem(newCrl->derCrl, oldCrl->derCrl) == SECEqual) {
            crl = newCrl;
            crl->slot = PK11_ReferenceSlot(slot);
            crl->pkcs11ID = oldCrl->pkcs11ID;
            if (oldCrl->url && !url)
                url = oldCrl->url;
            if (url)
                crl->url = PORT_ArenaStrdup(crl->arena, url);
            goto done;
        }
        if (!SEC_CrlIsNewer(&newCrl->crl, &oldCrl->crl)) {
            PORT_SetError(SEC_ERROR_OLD_CRL);
            goto done;
        }

        /* if we have a url in the database, use that one */
        if (oldCrl->url && !url) {
            url = oldCrl->url;
        }

        /* really destroy this crl */
        /* first drum it out of the permanment Data base */
        deleteOldCrl = PR_TRUE;
    }

    /* invalidate CRL cache for this issuer */
    CERT_CRLCacheRefreshIssuer(NULL, &newCrl->crl.derName);
    /* Write the new entry into the data base */
    crlHandle = PK11_PutCrl(slot, derCrl, &newCrl->crl.derName, url, type);
    if (crlHandle != CK_INVALID_HANDLE) {
        crl = newCrl;
        crl->slot = PK11_ReferenceSlot(slot);
        crl->pkcs11ID = crlHandle;
        if (url) {
            crl->url = PORT_ArenaStrdup(crl->arena, url);
        }
    }

done:
    if (oldCrl) {
        if (deleteOldCrl && crlHandle != CK_INVALID_HANDLE) {
            SEC_DeletePermCRL(oldCrl);
        }
        SEC_DestroyCrl(oldCrl);
    }

    return crl;
}

/*
 *
 * create a new CRL from DER material.
 *
 * The signature on this CRL must be checked before you
 * load it. ???
 */
CERTSignedCrl*
SEC_NewCrl(CERTCertDBHandle* handle, char* url, SECItem* derCrl, int type)
{
    CERTSignedCrl* retCrl = NULL;
    PK11SlotInfo* slot = PK11_GetInternalKeySlot();
    retCrl =
        PK11_ImportCRL(slot, derCrl, url, type, NULL, CRL_IMPORT_BYPASS_CHECKS,
                       NULL, CRL_DECODE_DEFAULT_OPTIONS);
    PK11_FreeSlot(slot);

    return retCrl;
}

CERTSignedCrl*
SEC_FindCrlByDERCert(CERTCertDBHandle* handle, SECItem* derCrl, int type)
{
    PLArenaPool* arena;
    SECItem crlKey;
    SECStatus rv;
    CERTSignedCrl* crl = NULL;

    /* create a scratch arena */
    arena = PORT_NewArena(DER_DEFAULT_CHUNKSIZE);
    if (arena == NULL) {
        return (NULL);
    }

    /* extract the database key from the cert */
    rv = CERT_KeyFromDERCrl(arena, derCrl, &crlKey);
    if (rv != SECSuccess) {
        goto loser;
    }

    /* find the crl */
    crl = SEC_FindCrlByName(handle, &crlKey, type);

loser:
    PORT_FreeArena(arena, PR_FALSE);
    return (crl);
}

CERTSignedCrl*
SEC_DupCrl(CERTSignedCrl* acrl)
{
    if (acrl) {
        PR_ATOMIC_INCREMENT(&acrl->referenceCount);
        return acrl;
    }
    return NULL;
}

SECStatus
SEC_DestroyCrl(CERTSignedCrl* crl)
{
    if (crl) {
        if (PR_ATOMIC_DECREMENT(&crl->referenceCount) < 1) {
            if (crl->slot) {
                PK11_FreeSlot(crl->slot);
            }
            if (GetOpaqueCRLFields(crl) &&
                PR_TRUE == GetOpaqueCRLFields(crl)->heapDER) {
                SECITEM_FreeItem(crl->derCrl, PR_TRUE);
            }
            if (crl->arena) {
                PORT_FreeArena(crl->arena, PR_FALSE);
            }
        }
        return SECSuccess;
    } else {
        return SECFailure;
    }
}

SECStatus
SEC_LookupCrls(CERTCertDBHandle* handle, CERTCrlHeadNode** nodes, int type)
{
    CERTCrlHeadNode* head;
    PLArenaPool* arena = NULL;
    SECStatus rv;

    *nodes = NULL;

    arena = PORT_NewArena(DER_DEFAULT_CHUNKSIZE);
    if (arena == NULL) {
        return SECFailure;
    }

    /* build a head structure */
    head = (CERTCrlHeadNode*)PORT_ArenaAlloc(arena, sizeof(CERTCrlHeadNode));
    head->arena = arena;
    head->first = NULL;
    head->last = NULL;
    head->dbhandle = handle;

    /* Look up the proper crl types */
    *nodes = head;

    rv = PK11_LookupCrls(head, type, NULL);

    if (rv != SECSuccess) {
        if (arena) {
            PORT_FreeArena(arena, PR_FALSE);
            *nodes = NULL;
        }
    }

    return rv;
}

/* These functions simply return the address of the above-declared templates.
** This is necessary for Windows DLLs.  Sigh.
*/
SEC_ASN1_CHOOSER_IMPLEMENT(CERT_IssuerAndSNTemplate)
SEC_ASN1_CHOOSER_IMPLEMENT(CERT_CrlTemplate)
SEC_ASN1_CHOOSER_IMPLEMENT(CERT_SignedCrlTemplate)
SEC_ASN1_CHOOSER_IMPLEMENT(CERT_SetOfSignedCrlTemplate)

/* CRL cache code starts here */

/* constructor */
static SECStatus CachedCrl_Create(CachedCrl** returned, CERTSignedCrl* crl,
                                  CRLOrigin origin);
/* destructor */
static SECStatus CachedCrl_Destroy(CachedCrl* crl);

/* create hash table of CRL entries */
static SECStatus CachedCrl_Populate(CachedCrl* crlobject);

/* empty the cache content */
static SECStatus CachedCrl_Depopulate(CachedCrl* crl);

/* are these CRLs the same, as far as the cache is concerned ?
   Or are they the same token object, but with different DER ? */

static SECStatus CachedCrl_Compare(CachedCrl* a, CachedCrl* b, PRBool* isDupe,
                                   PRBool* isUpdated);

/* create a DPCache object */
static SECStatus DPCache_Create(CRLDPCache** returned, CERTCertificate* issuer,
                                const SECItem* subject, SECItem* dp);

/* destructor for CRL DPCache object */
static SECStatus DPCache_Destroy(CRLDPCache* cache);

/* add a new CRL object to the dynamic array of CRLs of the DPCache, and
   returns the cached CRL object . Needs write access to DPCache. */
static SECStatus DPCache_AddCRL(CRLDPCache* cache, CachedCrl* crl,
                                PRBool* added);

/* fetch the CRL for this DP from the PKCS#11 tokens */
static SECStatus DPCache_FetchFromTokens(CRLDPCache* cache, PRTime vfdate,
                                         void* wincx);

/* update the content of the CRL cache, including fetching of CRLs, and
   reprocessing with specified issuer and date */
static SECStatus DPCache_GetUpToDate(CRLDPCache* cache, CERTCertificate* issuer,
                                     PRBool readlocked, PRTime vfdate,
                                     void* wincx);

/* returns true if there are CRLs from PKCS#11 slots */
static PRBool DPCache_HasTokenCRLs(CRLDPCache* cache);

/* remove CRL at offset specified */
static SECStatus DPCache_RemoveCRL(CRLDPCache* cache, PRUint32 offset);

/* Pick best CRL to use . needs write access */
static SECStatus DPCache_SelectCRL(CRLDPCache* cache);

/* create an issuer cache object (per CA subject ) */
static SECStatus IssuerCache_Create(CRLIssuerCache** returned,
                                    CERTCertificate* issuer,
                                    const SECItem* subject, const SECItem* dp);

/* destructor for CRL IssuerCache object */
SECStatus IssuerCache_Destroy(CRLIssuerCache* cache);

/* add a DPCache to the issuer cache */
static SECStatus IssuerCache_AddDP(CRLIssuerCache* cache,
                                   CERTCertificate* issuer,
                                   const SECItem* subject, const SECItem* dp,
                                   CRLDPCache** newdpc);

/* get a particular DPCache object from an IssuerCache */
static CRLDPCache* IssuerCache_GetDPCache(CRLIssuerCache* cache,
                                          const SECItem* dp);

/*
** Pre-allocator hash allocator ops.
*/

/* allocate memory for hash table */
static void* PR_CALLBACK
PreAllocTable(void* pool, PRSize size)
{
    PreAllocator* alloc = (PreAllocator*)pool;
    PORT_Assert(alloc);
    if (!alloc) {
        /* no allocator, or buffer full */
        return NULL;
    }
    if (size > (alloc->len - alloc->used)) {
        /* initial buffer full, let's use the arena */
        alloc->extra += size;
        return PORT_ArenaAlloc(alloc->arena, size);
    }
    /* use the initial buffer */
    alloc->used += size;
    return (char*)alloc->data + alloc->used - size;
}

/* free hash table memory.
   Individual PreAllocator elements cannot be freed, so this is a no-op. */
static void PR_CALLBACK
PreFreeTable(void* pool, void* item)
{
}

/* allocate memory for hash table */
static PLHashEntry* PR_CALLBACK
PreAllocEntry(void* pool, const void* key)
{
    return PreAllocTable(pool, sizeof(PLHashEntry));
}

/* free hash table entry.
   Individual PreAllocator elements cannot be freed, so this is a no-op. */
static void PR_CALLBACK
PreFreeEntry(void* pool, PLHashEntry* he, PRUintn flag)
{
}

/* methods required for PL hash table functions */
static PLHashAllocOps preAllocOps = { PreAllocTable, PreFreeTable,
                                      PreAllocEntry, PreFreeEntry };

/* destructor for PreAllocator object */
void
PreAllocator_Destroy(PreAllocator* allocator)
{
    if (!allocator) {
        return;
    }
    if (allocator->arena) {
        PORT_FreeArena(allocator->arena, PR_TRUE);
    }
}

/* constructor for PreAllocator object */
PreAllocator*
PreAllocator_Create(PRSize size)
{
    PLArenaPool* arena = NULL;
    PreAllocator* prebuffer = NULL;
    arena = PORT_NewArena(DER_DEFAULT_CHUNKSIZE);
    if (!arena) {
        return NULL;
    }
    prebuffer = (PreAllocator*)PORT_ArenaZAlloc(arena, sizeof(PreAllocator));
    if (!prebuffer) {
        PORT_FreeArena(arena, PR_TRUE);
        return NULL;
    }
    prebuffer->arena = arena;

    if (size) {
        prebuffer->len = size;
        prebuffer->data = PORT_ArenaAlloc(arena, size);
        if (!prebuffer->data) {
            PORT_FreeArena(arena, PR_TRUE);
            return NULL;
        }
    }
    return prebuffer;
}

/* global Named CRL cache object */
static NamedCRLCache namedCRLCache = { NULL, NULL };

/* global CRL cache object */
static CRLCache crlcache = { NULL, NULL };

/* initial state is off */
static PRBool crlcache_initialized = PR_FALSE;

PRTime CRLCache_Empty_TokenFetch_Interval = 60 * 1000000; /* how often
    to query the tokens for CRL objects, in order to discover new objects, if
    the cache does not contain any token CRLs . In microseconds */

PRTime CRLCache_TokenRefetch_Interval = 600 * 1000000; /* how often
   to query the tokens for CRL objects, in order to discover new objects, if
   the cache already contains token CRLs In microseconds */

PRTime CRLCache_ExistenceCheck_Interval = 60 * 1000000; /* how often to check
    if a token CRL object still exists. In microseconds */

/* this function is called at NSS initialization time */
SECStatus
InitCRLCache(void)
{
    if (PR_FALSE == crlcache_initialized) {
        PORT_Assert(NULL == crlcache.lock);
        PORT_Assert(NULL == crlcache.issuers);
        PORT_Assert(NULL == namedCRLCache.lock);
        PORT_Assert(NULL == namedCRLCache.entries);
        if (crlcache.lock || crlcache.issuers || namedCRLCache.lock ||
            namedCRLCache.entries) {
            /* CRL cache already partially initialized */
            PORT_SetError(SEC_ERROR_LIBRARY_FAILURE);
            return SECFailure;
        }
#ifdef GLOBAL_RWLOCK
        crlcache.lock = NSSRWLock_New(NSS_RWLOCK_RANK_NONE, NULL);
#else
        crlcache.lock = PR_NewLock();
#endif
        namedCRLCache.lock = PR_NewLock();
        crlcache.issuers = PL_NewHashTable(0, SECITEM_Hash, SECITEM_HashCompare,
                                           PL_CompareValues, NULL, NULL);
        namedCRLCache.entries = PL_NewHashTable(
            0, SECITEM_Hash, SECITEM_HashCompare, PL_CompareValues, NULL, NULL);
        if (!crlcache.lock || !namedCRLCache.lock || !crlcache.issuers ||
            !namedCRLCache.entries) {
            if (crlcache.lock) {
#ifdef GLOBAL_RWLOCK
                NSSRWLock_Destroy(crlcache.lock);
#else
                PR_DestroyLock(crlcache.lock);
#endif
                crlcache.lock = NULL;
            }
            if (namedCRLCache.lock) {
                PR_DestroyLock(namedCRLCache.lock);
                namedCRLCache.lock = NULL;
            }
            if (crlcache.issuers) {
                PL_HashTableDestroy(crlcache.issuers);
                crlcache.issuers = NULL;
            }
            if (namedCRLCache.entries) {
                PL_HashTableDestroy(namedCRLCache.entries);
                namedCRLCache.entries = NULL;
            }

            return SECFailure;
        }
        crlcache_initialized = PR_TRUE;
        return SECSuccess;
    } else {
        PORT_Assert(crlcache.lock);
        PORT_Assert(crlcache.issuers);
        if ((NULL == crlcache.lock) || (NULL == crlcache.issuers)) {
            /* CRL cache not fully initialized */
            return SECFailure;
        } else {
            /* CRL cache already initialized */
            return SECSuccess;
        }
    }
}

/* destructor for CRL DPCache object */
static SECStatus
DPCache_Destroy(CRLDPCache* cache)
{
    PRUint32 i = 0;
    PORT_Assert(cache);
    if (!cache) {
        PORT_Assert(0);
        PORT_SetError(SEC_ERROR_LIBRARY_FAILURE);
        return SECFailure;
    }
    if (cache->lock) {
#ifdef DPC_RWLOCK
        NSSRWLock_Destroy(cache->lock);
#else
        PR_DestroyLock(cache->lock);
#endif
    } else {
        PORT_Assert(0);
        return SECFailure;
    }
    /* destroy all our CRL objects */
    for (i = 0; i < cache->ncrls; i++) {
        if (!cache->crls || !cache->crls[i] ||
            SECSuccess != CachedCrl_Destroy(cache->crls[i])) {
            return SECFailure;
        }
    }
    /* free the array of CRLs */
    if (cache->crls) {
        PORT_Free(cache->crls);
    }
    /* destroy the cert */
    if (cache->issuerDERCert) {
        SECITEM_FreeItem(cache->issuerDERCert, PR_TRUE);
    }
    /* free the subject */
    if (cache->subject) {
        SECITEM_FreeItem(cache->subject, PR_TRUE);
    }
    /* free the distribution points */
    if (cache->distributionPoint) {
        SECITEM_FreeItem(cache->distributionPoint, PR_TRUE);
    }
    PORT_Free(cache);
    return SECSuccess;
}

/* destructor for CRL IssuerCache object */
SECStatus
IssuerCache_Destroy(CRLIssuerCache* cache)
{
    PORT_Assert(cache);
    if (!cache) {
        PORT_Assert(0);
        PORT_SetError(SEC_ERROR_LIBRARY_FAILURE);
        return SECFailure;
    }
#ifdef XCRL
    if (cache->lock) {
        NSSRWLock_Destroy(cache->lock);
    } else {
        PORT_Assert(0);
        PORT_SetError(SEC_ERROR_LIBRARY_FAILURE);
        return SECFailure;
    }
    if (cache->issuer) {
        CERT_DestroyCertificate(cache->issuer);
    }
#endif
    /* free the subject */
    if (cache->subject) {
        SECITEM_FreeItem(cache->subject, PR_TRUE);
    }
    if (SECSuccess != DPCache_Destroy(cache->dpp)) {
        PORT_Assert(0);
        return SECFailure;
    }
    PORT_Free(cache);
    return SECSuccess;
}

/* create a named CRL entry object */
static SECStatus
NamedCRLCacheEntry_Create(NamedCRLCacheEntry** returned)
{
    NamedCRLCacheEntry* entry = NULL;
    if (!returned) {
        PORT_Assert(0);
        PORT_SetError(SEC_ERROR_LIBRARY_FAILURE);
        return SECFailure;
    }
    *returned = NULL;
    entry = (NamedCRLCacheEntry*)PORT_ZAlloc(sizeof(NamedCRLCacheEntry));
    if (!entry) {
        return SECFailure;
    }
    *returned = entry;
    return SECSuccess;
}

/* destroy a named CRL entry object */
static SECStatus
NamedCRLCacheEntry_Destroy(NamedCRLCacheEntry* entry)
{
    if (!entry) {
        PORT_Assert(0);
        PORT_SetError(SEC_ERROR_LIBRARY_FAILURE);
        return SECFailure;
    }
    if (entry->crl) {
        /* named CRL cache owns DER memory */
        SECITEM_ZfreeItem(entry->crl, PR_TRUE);
    }
    if (entry->canonicalizedName) {
        SECITEM_FreeItem(entry->canonicalizedName, PR_TRUE);
    }
    PORT_Free(entry);
    return SECSuccess;
}

/* callback function used in hash table destructor */
static PRIntn PR_CALLBACK
FreeIssuer(PLHashEntry* he, PRIntn i, void* arg)
{
    CRLIssuerCache* issuer = NULL;
    SECStatus* rv = (SECStatus*)arg;

    PORT_Assert(he);
    if (!he) {
        return HT_ENUMERATE_NEXT;
    }
    issuer = (CRLIssuerCache*)he->value;
    PORT_Assert(issuer);
    if (issuer) {
        if (SECSuccess != IssuerCache_Destroy(issuer)) {
            PORT_Assert(rv);
            if (rv) {
                *rv = SECFailure;
            }
            return HT_ENUMERATE_NEXT;
        }
    }
    return HT_ENUMERATE_NEXT;
}

/* callback function used in hash table destructor */
static PRIntn PR_CALLBACK
FreeNamedEntries(PLHashEntry* he, PRIntn i, void* arg)
{
    NamedCRLCacheEntry* entry = NULL;
    SECStatus* rv = (SECStatus*)arg;

    PORT_Assert(he);
    if (!he) {
        return HT_ENUMERATE_NEXT;
    }
    entry = (NamedCRLCacheEntry*)he->value;
    PORT_Assert(entry);
    if (entry) {
        if (SECSuccess != NamedCRLCacheEntry_Destroy(entry)) {
            PORT_Assert(rv);
            if (rv) {
                *rv = SECFailure;
            }
            return HT_ENUMERATE_NEXT;
        }
    }
    return HT_ENUMERATE_NEXT;
}

/* needs to be called at NSS shutdown time
   This will destroy the global CRL cache, including
   - the hash table of issuer cache objects
   - the issuer cache objects
   - DPCache objects in issuer cache objects */
SECStatus
ShutdownCRLCache(void)
{
    SECStatus rv = SECSuccess;
    if (PR_FALSE == crlcache_initialized && !crlcache.lock &&
        !crlcache.issuers) {
        /* CRL cache has already been shut down */
        return SECSuccess;
    }
    if (PR_TRUE == crlcache_initialized &&
        (!crlcache.lock || !crlcache.issuers || !namedCRLCache.lock ||
         !namedCRLCache.entries)) {
        /* CRL cache has partially been shut down */
        PORT_SetError(SEC_ERROR_LIBRARY_FAILURE);
        return SECFailure;
    }
    /* empty the CRL cache */
    /* free the issuers */
    PL_HashTableEnumerateEntries(crlcache.issuers, &FreeIssuer, &rv);
    /* free the hash table of issuers */
    PL_HashTableDestroy(crlcache.issuers);
    crlcache.issuers = NULL;
/* free the global lock */
#ifdef GLOBAL_RWLOCK
    NSSRWLock_Destroy(crlcache.lock);
#else
    PR_DestroyLock(crlcache.lock);
#endif
    crlcache.lock = NULL;

    /* empty the named CRL cache. This must be done after freeing the CRL
     * cache, since some CRLs in this cache are in the memory for the other  */
    /* free the entries */
    PL_HashTableEnumerateEntries(namedCRLCache.entries, &FreeNamedEntries, &rv);
    /* free the hash table of issuers */
    PL_HashTableDestroy(namedCRLCache.entries);
    namedCRLCache.entries = NULL;
    /* free the global lock */
    PR_DestroyLock(namedCRLCache.lock);
    namedCRLCache.lock = NULL;

    crlcache_initialized = PR_FALSE;
    return rv;
}

/* add a new CRL object to the dynamic array of CRLs of the DPCache, and
   returns the cached CRL object . Needs write access to DPCache. */
static SECStatus
DPCache_AddCRL(CRLDPCache* cache, CachedCrl* newcrl, PRBool* added)
{
    CachedCrl** newcrls = NULL;
    PRUint32 i = 0;
    PORT_Assert(cache);
    PORT_Assert(newcrl);
    PORT_Assert(added);
    if (!cache || !newcrl || !added) {
        PORT_SetError(SEC_ERROR_LIBRARY_FAILURE);
        return SECFailure;
    }

    *added = PR_FALSE;
    /* before adding a new CRL, check if it is a duplicate */
    for (i = 0; i < cache->ncrls; i++) {
        CachedCrl* existing = NULL;
        SECStatus rv = SECSuccess;
        PRBool dupe = PR_FALSE, updated = PR_FALSE;
        if (!cache->crls) {
            PORT_Assert(0);
            return SECFailure;
        }
        existing = cache->crls[i];
        if (!existing) {
            PORT_Assert(0);
            return SECFailure;
        }
        rv = CachedCrl_Compare(existing, newcrl, &dupe, &updated);
        if (SECSuccess != rv) {
            PORT_Assert(0);
            PORT_SetError(SEC_ERROR_LIBRARY_FAILURE);
            return SECFailure;
        }
        if (PR_TRUE == dupe) {
            /* dupe */
            PORT_SetError(SEC_ERROR_CRL_ALREADY_EXISTS);
            return SECSuccess;
        }
        if (PR_TRUE == updated) {
            /* this token CRL is in the same slot and has the same object ID,
               but different content. We need to remove the old object */
            if (SECSuccess != DPCache_RemoveCRL(cache, i)) {
                PORT_Assert(0);
                PORT_SetError(SEC_ERROR_LIBRARY_FAILURE);
                return PR_FALSE;
            }
        }
    }

    newcrls = (CachedCrl**)PORT_Realloc(cache->crls, (cache->ncrls + 1) * sizeof(CachedCrl*));
    if (!newcrls) {
        return SECFailure;
    }
    cache->crls = newcrls;
    cache->ncrls++;
    cache->crls[cache->ncrls - 1] = newcrl;
    *added = PR_TRUE;
    return SECSuccess;
}

/* remove CRL at offset specified */
static SECStatus
DPCache_RemoveCRL(CRLDPCache* cache, PRUint32 offset)
{
    CachedCrl* acrl = NULL;
    PORT_Assert(cache);
    if (!cache || (!cache->crls) || (!(offset < cache->ncrls))) {
        PORT_SetError(SEC_ERROR_LIBRARY_FAILURE);
        return SECFailure;
    }
    acrl = cache->crls[offset];
    PORT_Assert(acrl);
    if (!acrl) {
        PORT_SetError(SEC_ERROR_LIBRARY_FAILURE);
        return SECFailure;
    }
    cache->crls[offset] = cache->crls[cache->ncrls - 1];
    cache->crls[cache->ncrls - 1] = NULL;
    cache->ncrls--;
    if (cache->selected == acrl) {
        cache->selected = NULL;
    }
    if (SECSuccess != CachedCrl_Destroy(acrl)) {
        PORT_Assert(0);
        PORT_SetError(SEC_ERROR_LIBRARY_FAILURE);
        return SECFailure;
    }
    return SECSuccess;
}

/* check whether a CRL object stored in a PKCS#11 token still exists in
   that token . This has to be efficient (the entire CRL value cannot be
   transferred accross the token boundaries), so this is accomplished by
   simply fetching the subject attribute and making sure it hasn't changed .
   Note that technically, the CRL object could have been replaced with a new
   PKCS#11 object of the same ID and subject (which actually happens in
   softoken), but this function has no way of knowing that the object
   value changed, since CKA_VALUE isn't checked. */
static PRBool
TokenCRLStillExists(CERTSignedCrl* crl)
{
    NSSItem newsubject;
    SECItem subject;
    CK_ULONG crl_class;
    PRStatus status;
    PK11SlotInfo* slot = NULL;
    nssCryptokiObject instance;
    NSSArena* arena;
    PRBool xstatus = PR_TRUE;
    SECItem* oldSubject = NULL;

    PORT_Assert(crl);
    if (!crl) {
        return PR_FALSE;
    }
    slot = crl->slot;
    PORT_Assert(crl->slot);
    if (!slot) {
        return PR_FALSE;
    }
    oldSubject = &crl->crl.derName;
    PORT_Assert(oldSubject);
    if (!oldSubject) {
        return PR_FALSE;
    }

    /* query subject and type attributes in order to determine if the
       object has been deleted */

    /* first, make an nssCryptokiObject */
    instance.handle = crl->pkcs11ID;
    PORT_Assert(instance.handle);
    if (!instance.handle) {
        return PR_FALSE;
    }
    instance.token = PK11Slot_GetNSSToken(slot);
    PORT_Assert(instance.token);
    if (!instance.token) {
        return PR_FALSE;
    }
    instance.isTokenObject = PR_TRUE;
    instance.label = NULL;

    arena = NSSArena_Create();
    PORT_Assert(arena);
    if (!arena) {
        return PR_FALSE;
    }

    status =
        nssCryptokiCRL_GetAttributes(&instance, NULL,          /* XXX sessionOpt */
                                     arena, NULL, &newsubject, /* subject */
                                     &crl_class,               /* class */
                                     NULL, NULL);
    if (PR_SUCCESS == status) {
        subject.data = newsubject.data;
        subject.len = newsubject.size;
        if (SECITEM_CompareItem(oldSubject, &subject) != SECEqual) {
            xstatus = PR_FALSE;
        }
        if (CKO_NETSCAPE_CRL != crl_class) {
            xstatus = PR_FALSE;
        }
    } else {
        xstatus = PR_FALSE;
    }
    NSSArena_Destroy(arena);
    return xstatus;
}

/* verify the signature of a CRL against its issuer at a given date */
static SECStatus
CERT_VerifyCRL(CERTSignedCrl* crlobject, CERTCertificate* issuer, PRTime vfdate,
               void* wincx)
{
    return CERT_VerifySignedData(&crlobject->signatureWrap, issuer, vfdate,
                                 wincx);
}

/* verify a CRL and update cache state */
static SECStatus
CachedCrl_Verify(CRLDPCache* cache, CachedCrl* crlobject, PRTime vfdate,
                 void* wincx)
{
    /*  Check if it is an invalid CRL
        if we got a bad CRL, we want to cache it in order to avoid
        subsequent fetches of this same identical bad CRL. We set
        the cache to the invalid state to ensure that all certs on this
        DP are considered to have unknown status from now on. The cache
        object will remain in this state until the bad CRL object
        is removed from the token it was fetched from. If the cause
        of the failure is that we didn't have the issuer cert to
        verify the signature, this state can be cleared when
        the issuer certificate becomes available if that causes the
        signature to verify */

    if (!cache || !crlobject) {
        PORT_Assert(0);
        PORT_SetError(SEC_ERROR_LIBRARY_FAILURE);
        return SECFailure;
    }
    if (PR_TRUE == GetOpaqueCRLFields(crlobject->crl)->decodingError) {
        crlobject->sigChecked = PR_TRUE; /* we can never verify a CRL
            with bogus DER. Mark it checked so we won't try again */
        PORT_SetError(SEC_ERROR_BAD_DER);
        return SECSuccess;
    } else {
        SECStatus signstatus = SECFailure;
        if (cache->issuerDERCert) {
            CERTCertificate* issuer = CERT_NewTempCertificate(
                cache->dbHandle, cache->issuerDERCert, NULL, PR_FALSE, PR_TRUE);

            if (issuer) {
                signstatus =
                    CERT_VerifyCRL(crlobject->crl, issuer, vfdate, wincx);
                CERT_DestroyCertificate(issuer);
            }
        }
        if (SECSuccess != signstatus) {
            if (!cache->issuerDERCert) {
                /* we tried to verify without an issuer cert . This is
                   because this CRL came through a call to SEC_FindCrlByName.
                   So, we don't cache this verification failure. We'll try
                   to verify the CRL again when a certificate from that issuer
                   becomes available */
            } else {
                crlobject->sigChecked = PR_TRUE;
            }
            PORT_SetError(SEC_ERROR_CRL_BAD_SIGNATURE);
            return SECSuccess;
        } else {
            crlobject->sigChecked = PR_TRUE;
            crlobject->sigValid = PR_TRUE;
        }
    }

    return SECSuccess;
}

/* fetch the CRLs for this DP from the PKCS#11 tokens */
static SECStatus
DPCache_FetchFromTokens(CRLDPCache* cache, PRTime vfdate, void* wincx)
{
    SECStatus rv = SECSuccess;
    CERTCrlHeadNode head;
    if (!cache) {
        PORT_Assert(0);
        PORT_SetError(SEC_ERROR_LIBRARY_FAILURE);
        return SECFailure;
    }
    /* first, initialize list */
    memset(&head, 0, sizeof(head));
    head.arena = PORT_NewArena(DER_DEFAULT_CHUNKSIZE);
    rv = pk11_RetrieveCrls(&head, cache->subject, wincx);

    /* if this function fails, something very wrong happened, such as an out
       of memory error during CRL decoding. We don't want to proceed and must
       mark the cache object invalid */
    if (SECFailure == rv) {
        /* fetch failed, add error bit */
        cache->invalid |= CRL_CACHE_LAST_FETCH_FAILED;
    } else {
        /* fetch was successful, clear this error bit */
        cache->invalid &= (~CRL_CACHE_LAST_FETCH_FAILED);
    }

    /* add any CRLs found to our array */
    if (SECSuccess == rv) {
        CERTCrlNode* crlNode = NULL;

        for (crlNode = head.first; crlNode; crlNode = crlNode->next) {
            CachedCrl* returned = NULL;
            CERTSignedCrl* crlobject = crlNode->crl;
            if (!crlobject) {
                PORT_Assert(0);
                continue;
            }
            rv = CachedCrl_Create(&returned, crlobject, CRL_OriginToken);
            if (SECSuccess == rv) {
                PRBool added = PR_FALSE;
                rv = DPCache_AddCRL(cache, returned, &added);
                if (PR_TRUE != added) {
                    rv = CachedCrl_Destroy(returned);
                    returned = NULL;
                } else if (vfdate) {
                    rv = CachedCrl_Verify(cache, returned, vfdate, wincx);
                }
            } else {
                /* not enough memory to add the CRL to the cache. mark it
                   invalid so we will try again . */
                cache->invalid |= CRL_CACHE_LAST_FETCH_FAILED;
            }
            if (SECFailure == rv) {
                break;
            }
        }
    }

    if (head.arena) {
        CERTCrlNode* crlNode = NULL;
        /* clean up the CRL list in case we got a partial one
           during a failed fetch */
        for (crlNode = head.first; crlNode; crlNode = crlNode->next) {
            if (crlNode->crl) {
                SEC_DestroyCrl(crlNode->crl); /* free the CRL. Either it got
                   added to the cache and the refcount got bumped, or not, and
                   thus we need to free its RAM */
            }
        }
        PORT_FreeArena(head.arena, PR_FALSE); /* destroy CRL list */
    }

    return rv;
}

static SECStatus
CachedCrl_GetEntry(CachedCrl* crl, const SECItem* sn, CERTCrlEntry** returned)
{
    CERTCrlEntry* acrlEntry;

    PORT_Assert(crl);
    PORT_Assert(crl->entries);
    PORT_Assert(sn);
    PORT_Assert(returned);
    if (!crl || !sn || !returned || !crl->entries) {
        PORT_SetError(SEC_ERROR_INVALID_ARGS);
        return SECFailure;
    }
    acrlEntry = PL_HashTableLookup(crl->entries, (void*)sn);
    if (acrlEntry) {
        *returned = acrlEntry;
    } else {
        *returned = NULL;
    }
    return SECSuccess;
}

/* check if a particular SN is in the CRL cache and return its entry */
dpcacheStatus
DPCache_Lookup(CRLDPCache* cache, const SECItem* sn, CERTCrlEntry** returned)
{
    SECStatus rv;
    if (!cache || !sn || !returned) {
        PORT_SetError(SEC_ERROR_INVALID_ARGS);
        /* no cache or SN to look up, or no way to return entry */
        return dpcacheCallerError;
    }
    *returned = NULL;
    if (0 != cache->invalid) {
        /* the cache contains a bad CRL, or there was a CRL fetching error. */
        PORT_SetError(SEC_ERROR_CRL_INVALID);
        return dpcacheInvalidCacheError;
    }
    if (!cache->selected) {
        /* no CRL means no entry to return. This is OK, except for
         * NIST policy */
        return dpcacheEmpty;
    }
    rv = CachedCrl_GetEntry(cache->selected, sn, returned);
    if (SECSuccess != rv) {
        return dpcacheLookupError;
    } else {
        if (*returned) {
            return dpcacheFoundEntry;
        } else {
            return dpcacheNoEntry;
        }
    }
}

#if defined(DPC_RWLOCK)

#define DPCache_LockWrite()                    \
    {                                          \
        if (readlocked) {                      \
            NSSRWLock_UnlockRead(cache->lock); \
        }                                      \
        NSSRWLock_LockWrite(cache->lock);      \
    }

#define DPCache_UnlockWrite()                \
    {                                        \
        if (readlocked) {                    \
            NSSRWLock_LockRead(cache->lock); \
        }                                    \
        NSSRWLock_UnlockWrite(cache->lock);  \
    }

#else

/* with a global lock, we are always locked for read before we need write
   access, so do nothing */

#define DPCache_LockWrite() \
    {                       \
    }

#define DPCache_UnlockWrite() \
    {                         \
    }

#endif

/* update the content of the CRL cache, including fetching of CRLs, and
   reprocessing with specified issuer and date . We are always holding
   either the read or write lock on DPCache upon entry. */
static SECStatus
DPCache_GetUpToDate(CRLDPCache* cache, CERTCertificate* issuer,
                    PRBool readlocked, PRTime vfdate, void* wincx)
{
    /* Update the CRLDPCache now. We don't cache token CRL lookup misses
       yet, as we have no way of getting notified of new PKCS#11 object
       creation that happens in a token  */
    SECStatus rv = SECSuccess;
    PRUint32 i = 0;
    PRBool forcedrefresh = PR_FALSE;
    PRBool dirty = PR_FALSE; /* whether something was changed in the
                                cache state during this update cycle */
    PRBool hastokenCRLs = PR_FALSE;
    PRTime now = 0;
    PRTime lastfetch = 0;
    PRBool mustunlock = PR_FALSE;

    if (!cache) {
        PORT_SetError(SEC_ERROR_LIBRARY_FAILURE);
        return SECFailure;
    }

    /* first, make sure we have obtained all the CRLs we need.
       We do an expensive token fetch in the following cases :
       1) cache is empty because no fetch was ever performed yet
       2) cache is explicitly set to refresh state
       3) cache is in invalid state because last fetch failed
       4) cache contains no token CRLs, and it's been more than one minute
          since the last fetch
       5) cache contains token CRLs, and it's been more than 10 minutes since
          the last fetch
    */
    forcedrefresh = cache->refresh;
    lastfetch = cache->lastfetch;
    if (PR_TRUE != forcedrefresh &&
        (!(cache->invalid & CRL_CACHE_LAST_FETCH_FAILED))) {
        now = PR_Now();
        hastokenCRLs = DPCache_HasTokenCRLs(cache);
    }
    if ((0 == lastfetch) ||

        (PR_TRUE == forcedrefresh) ||

        (cache->invalid & CRL_CACHE_LAST_FETCH_FAILED) ||

        ((PR_FALSE == hastokenCRLs) &&
         ((now - cache->lastfetch > CRLCache_Empty_TokenFetch_Interval) ||
          (now < cache->lastfetch))) ||

        ((PR_TRUE == hastokenCRLs) &&
         ((now - cache->lastfetch > CRLCache_TokenRefetch_Interval) ||
          (now < cache->lastfetch)))) {
        /* the cache needs to be refreshed, and/or we had zero CRL for this
           DP. Try to get one from PKCS#11 tokens */
        DPCache_LockWrite();
        /* check if another thread updated before us, and skip update if so */
        if (lastfetch == cache->lastfetch) {
            /* we are the first */
            rv = DPCache_FetchFromTokens(cache, vfdate, wincx);
            if (PR_TRUE == cache->refresh) {
                cache->refresh = PR_FALSE; /* clear refresh state */
            }
            dirty = PR_TRUE;
            cache->lastfetch = PR_Now();
        }
        DPCache_UnlockWrite();
    }

    /* now, make sure we have no extraneous CRLs (deleted token objects)
       we'll do this inexpensive existence check either
       1) if there was a token object fetch
       2) every minute */
    if ((PR_TRUE != dirty) && (!now)) {
        now = PR_Now();
    }
    if ((PR_TRUE == dirty) ||
        ((now - cache->lastcheck > CRLCache_ExistenceCheck_Interval) ||
         (now < cache->lastcheck))) {
        PRTime lastcheck = cache->lastcheck;
        mustunlock = PR_FALSE;
        /* check if all CRLs still exist */
        for (i = 0; (i < cache->ncrls); i++) {
            CachedCrl* savcrl = cache->crls[i];
            if ((!savcrl) || (savcrl && CRL_OriginToken != savcrl->origin)) {
                /* we only want to check token CRLs */
                continue;
            }
            if ((PR_TRUE != TokenCRLStillExists(savcrl->crl))) {

                /* this CRL is gone */
                if (PR_TRUE != mustunlock) {
                    DPCache_LockWrite();
                    mustunlock = PR_TRUE;
                }
                /* first, we need to check if another thread did an update
                   before we did */
                if (lastcheck == cache->lastcheck) {
                    /* the CRL is gone. And we are the one to do the update */
                    DPCache_RemoveCRL(cache, i);
                    dirty = PR_TRUE;
                }
                /* stay locked here intentionally so we do all the other
                   updates in this thread for the remaining CRLs */
            }
        }
        if (PR_TRUE == mustunlock) {
            cache->lastcheck = PR_Now();
            DPCache_UnlockWrite();
            mustunlock = PR_FALSE;
        }
    }

    /* add issuer certificate if it was previously unavailable */
    if (issuer && (NULL == cache->issuerDERCert) &&
        (SECSuccess == CERT_CheckCertUsage(issuer, KU_CRL_SIGN))) {
        /* if we didn't have a valid issuer cert yet, but we do now. add it */
        DPCache_LockWrite();
        if (!cache->issuerDERCert) {
            dirty = PR_TRUE;
            cache->dbHandle = issuer->dbhandle;
            cache->issuerDERCert = SECITEM_DupItem(&issuer->derCert);
        }
        DPCache_UnlockWrite();
    }

    /* verify CRLs that couldn't be checked when inserted into the cache
       because the issuer cert or a verification date was unavailable.
       These are CRLs that were inserted into the cache through
       SEC_FindCrlByName, or through manual insertion, rather than through a
       certificate verification (CERT_CheckCRL) */

    if (cache->issuerDERCert && vfdate) {
        mustunlock = PR_FALSE;
        /* re-process all unverified CRLs */
        for (i = 0; i < cache->ncrls; i++) {
            CachedCrl* savcrl = cache->crls[i];
            if (!savcrl) {
                continue;
            }
            if (PR_TRUE != savcrl->sigChecked) {
                if (!mustunlock) {
                    DPCache_LockWrite();
                    mustunlock = PR_TRUE;
                }
                /* first, we need to check if another thread updated
                   it before we did, and abort if it has been modified since
                   we acquired the lock. Make sure first that the CRL is still
                   in the array at the same position */
                if ((i < cache->ncrls) && (savcrl == cache->crls[i]) &&
                    (PR_TRUE != savcrl->sigChecked)) {
                    /* the CRL is still there, unverified. Do it */
                    CachedCrl_Verify(cache, savcrl, vfdate, wincx);
                    dirty = PR_TRUE;
                }
                /* stay locked here intentionally so we do all the other
                   updates in this thread for the remaining CRLs */
            }
            if (mustunlock && !dirty) {
                DPCache_UnlockWrite();
                mustunlock = PR_FALSE;
            }
        }
    }

    if (dirty || cache->mustchoose) {
        /* changes to the content of the CRL cache necessitate examining all
           CRLs for selection of the most appropriate one to cache */
        if (!mustunlock) {
            DPCache_LockWrite();
            mustunlock = PR_TRUE;
        }
        DPCache_SelectCRL(cache);
        cache->mustchoose = PR_FALSE;
    }
    if (mustunlock)
        DPCache_UnlockWrite();

    return rv;
}

/* callback for qsort to sort by thisUpdate */
static int
SortCRLsByThisUpdate(const void* arg1, const void* arg2)
{
    PRTime timea, timeb;
    SECStatus rv = SECSuccess;
    CachedCrl *a, *b;

    a = *(CachedCrl**)arg1;
    b = *(CachedCrl**)arg2;

    if (!a || !b) {
        PORT_Assert(0);
        PORT_SetError(SEC_ERROR_LIBRARY_FAILURE);
        rv = SECFailure;
    }

    if (SECSuccess == rv) {
        rv = DER_DecodeTimeChoice(&timea, &a->crl->crl.lastUpdate);
    }
    if (SECSuccess == rv) {
        rv = DER_DecodeTimeChoice(&timeb, &b->crl->crl.lastUpdate);
    }
    if (SECSuccess == rv) {
        if (timea > timeb) {
            return 1; /* a is better than b */
        }
        if (timea < timeb) {
            return -1; /* a is not as good as b */
        }
    }

    /* if they are equal, or if all else fails, use pointer differences */
    PORT_Assert(a != b); /* they should never be equal */
    return a > b ? 1 : -1;
}

/* callback for qsort to sort a set of disparate CRLs, some of which are
   invalid DER or failed signature check.

   Validated CRLs are differentiated by thisUpdate .
   Validated CRLs are preferred over non-validated CRLs .
   Proper DER CRLs are preferred over non-DER data .
*/
static int
SortImperfectCRLs(const void* arg1, const void* arg2)
{
    CachedCrl *a, *b;

    a = *(CachedCrl**)arg1;
    b = *(CachedCrl**)arg2;

    if (!a || !b) {
        PORT_SetError(SEC_ERROR_LIBRARY_FAILURE);
        PORT_Assert(0);
    } else {
        PRBool aDecoded = PR_FALSE, bDecoded = PR_FALSE;
        if ((PR_TRUE == a->sigValid) && (PR_TRUE == b->sigValid)) {
            /* both CRLs have been validated, choose the latest one */
            return SortCRLsByThisUpdate(arg1, arg2);
        }
        if (PR_TRUE == a->sigValid) {
            return 1; /* a is greater than b */
        }
        if (PR_TRUE == b->sigValid) {
            return -1; /* a is not as good as b */
        }
        aDecoded = GetOpaqueCRLFields(a->crl)->decodingError;
        bDecoded = GetOpaqueCRLFields(b->crl)->decodingError;
        /* neither CRL had its signature check pass */
        if ((PR_FALSE == aDecoded) && (PR_FALSE == bDecoded)) {
            /* both CRLs are proper DER, choose the latest one */
            return SortCRLsByThisUpdate(arg1, arg2);
        }
        if (PR_FALSE == aDecoded) {
            return 1; /* a is better than b */
        }
        if (PR_FALSE == bDecoded) {
            return -1; /* a is not as good as b */
        }
        /* both are invalid DER. sigh. */
    }
    /* if they are equal, or if all else fails, use pointer differences */
    PORT_Assert(a != b); /* they should never be equal */
    return a > b ? 1 : -1;
}

/* Pick best CRL to use . needs write access */
static SECStatus
DPCache_SelectCRL(CRLDPCache* cache)
{
    PRUint32 i;
    PRBool valid = PR_TRUE;
    CachedCrl* selected = NULL;

    PORT_Assert(cache);
    if (!cache) {
        PORT_SetError(SEC_ERROR_LIBRARY_FAILURE);
        return SECFailure;
    }
    /* if any invalid CRL is present, then the CRL cache is
       considered invalid, for security reasons */
    for (i = 0; i < cache->ncrls; i++) {
        if (!cache->crls[i] || !cache->crls[i]->sigChecked ||
            !cache->crls[i]->sigValid) {
            valid = PR_FALSE;
            break;
        }
    }
    if (PR_TRUE == valid) {
        /* all CRLs are valid, clear this error */
        cache->invalid &= (~CRL_CACHE_INVALID_CRLS);
    } else {
        /* some CRLs are invalid, set this error */
        cache->invalid |= CRL_CACHE_INVALID_CRLS;
    }

    if (cache->invalid) {
        /* cache is in an invalid state, so reset it */
        if (cache->selected) {
            cache->selected = NULL;
        }
        /* also sort the CRLs imperfectly */
        qsort(cache->crls, cache->ncrls, sizeof(CachedCrl*), SortImperfectCRLs);
        return SECSuccess;
    }

    if (cache->ncrls) {
        /* all CRLs are good, sort them by thisUpdate */
        qsort(cache->crls, cache->ncrls, sizeof(CachedCrl*), SortCRLsByThisUpdate);

        /* pick the newest CRL */
        selected = cache->crls[cache->ncrls - 1];

        /* and populate the cache */
        if (SECSuccess != CachedCrl_Populate(selected)) {
            return SECFailure;
        }
    }

    cache->selected = selected;

    return SECSuccess;
}

/* initialize a DPCache object */
static SECStatus
DPCache_Create(CRLDPCache** returned, CERTCertificate* issuer,
               const SECItem* subject, SECItem* dp)
{
    CRLDPCache* cache = NULL;
    PORT_Assert(returned);
    /* issuer and dp are allowed to be NULL */
    if (!returned || !subject) {
        PORT_Assert(0);
        PORT_SetError(SEC_ERROR_LIBRARY_FAILURE);
        return SECFailure;
    }
    *returned = NULL;
    cache = PORT_ZAlloc(sizeof(CRLDPCache));
    if (!cache) {
        return SECFailure;
    }
#ifdef DPC_RWLOCK
    cache->lock = NSSRWLock_New(NSS_RWLOCK_RANK_NONE, NULL);
#else
    cache->lock = PR_NewLock();
#endif
    if (!cache->lock) {
        PORT_Free(cache);
        return SECFailure;
    }
    if (issuer) {
        cache->dbHandle = issuer->dbhandle;
        cache->issuerDERCert = SECITEM_DupItem(&issuer->derCert);
    }
    cache->distributionPoint = SECITEM_DupItem(dp);
    cache->subject = SECITEM_DupItem(subject);
    cache->lastfetch = 0;
    cache->lastcheck = 0;
    *returned = cache;
    return SECSuccess;
}

/* create an issuer cache object (per CA subject ) */
static SECStatus
IssuerCache_Create(CRLIssuerCache** returned, CERTCertificate* issuer,
                   const SECItem* subject, const SECItem* dp)
{
    SECStatus rv = SECSuccess;
    CRLIssuerCache* cache = NULL;
    PORT_Assert(returned);
    PORT_Assert(subject);
    /* issuer and dp are allowed to be NULL */
    if (!returned || !subject) {
        PORT_Assert(0);
        PORT_SetError(SEC_ERROR_LIBRARY_FAILURE);
        return SECFailure;
    }
    *returned = NULL;
    cache = (CRLIssuerCache*)PORT_ZAlloc(sizeof(CRLIssuerCache));
    if (!cache) {
        return SECFailure;
    }
    cache->subject = SECITEM_DupItem(subject);
#ifdef XCRL
    cache->lock = NSSRWLock_New(NSS_RWLOCK_RANK_NONE, NULL);
    if (!cache->lock) {
        rv = SECFailure;
    }
    if (SECSuccess == rv && issuer) {
        cache->issuer = CERT_DupCertificate(issuer);
        if (!cache->issuer) {
            rv = SECFailure;
        }
    }
#endif
    if (SECSuccess != rv) {
        PORT_Assert(SECSuccess == IssuerCache_Destroy(cache));
        return SECFailure;
    }
    *returned = cache;
    return SECSuccess;
}

/* add a DPCache to the issuer cache */
static SECStatus
IssuerCache_AddDP(CRLIssuerCache* cache, CERTCertificate* issuer,
                  const SECItem* subject, const SECItem* dp,
                  CRLDPCache** newdpc)
{
    /* now create the required DP cache object */
    if (!cache || !subject || !newdpc) {
        PORT_Assert(0);
        PORT_SetError(SEC_ERROR_LIBRARY_FAILURE);
        return SECFailure;
    }
    if (!dp) {
        /* default distribution point */
        SECStatus rv = DPCache_Create(&cache->dpp, issuer, subject, NULL);
        if (SECSuccess == rv) {
            *newdpc = cache->dpp;
            return SECSuccess;
        }
    } else {
        /* we should never hit this until we support multiple DPs */
        PORT_Assert(dp);
        /* XCRL allocate a new distribution point cache object, initialize it,
           and add it to the hash table of DPs */
    }
    return SECFailure;
}

/* add an IssuerCache to the global hash table of issuers */
static SECStatus
CRLCache_AddIssuer(CRLIssuerCache* issuer)
{
    PORT_Assert(issuer);
    PORT_Assert(crlcache.issuers);
    if (!issuer || !crlcache.issuers) {
        PORT_SetError(SEC_ERROR_LIBRARY_FAILURE);
        return SECFailure;
    }
    if (NULL == PL_HashTableAdd(crlcache.issuers, (void*)issuer->subject,
                                (void*)issuer)) {
        return SECFailure;
    }
    return SECSuccess;
}

/* retrieve the issuer cache object for a given issuer subject */
static SECStatus
CRLCache_GetIssuerCache(CRLCache* cache, const SECItem* subject,
                        CRLIssuerCache** returned)
{
    /* we need to look up the issuer in the hash table */
    SECStatus rv = SECSuccess;
    PORT_Assert(cache);
    PORT_Assert(subject);
    PORT_Assert(returned);
    PORT_Assert(crlcache.issuers);
    if (!cache || !subject || !returned || !crlcache.issuers) {
        PORT_SetError(SEC_ERROR_LIBRARY_FAILURE);
        rv = SECFailure;
    }

    if (SECSuccess == rv) {
        *returned = (CRLIssuerCache*)PL_HashTableLookup(crlcache.issuers,
                                                        (void*)subject);
    }

    return rv;
}

/* retrieve the full CRL object that best matches the content of a DPCache */
static CERTSignedCrl*
GetBestCRL(CRLDPCache* cache, PRBool entries)
{
    CachedCrl* acrl = NULL;

    PORT_Assert(cache);
    if (!cache) {
        PORT_SetError(SEC_ERROR_LIBRARY_FAILURE);
        return NULL;
    }

    if (0 == cache->ncrls) {
        /* empty cache*/
        PORT_SetError(SEC_ERROR_CRL_NOT_FOUND);
        return NULL;
    }

    /* if we have a valid full CRL selected, return it */
    if (cache->selected) {
        return SEC_DupCrl(cache->selected->crl);
    }

    /* otherwise, use latest valid DER CRL */
    acrl = cache->crls[cache->ncrls - 1];

    if (acrl && (PR_FALSE == GetOpaqueCRLFields(acrl->crl)->decodingError)) {
        SECStatus rv = SECSuccess;
        if (PR_TRUE == entries) {
            rv = CERT_CompleteCRLDecodeEntries(acrl->crl);
        }
        if (SECSuccess == rv) {
            return SEC_DupCrl(acrl->crl);
        }
    }

    PORT_SetError(SEC_ERROR_CRL_NOT_FOUND);
    return NULL;
}

/* get a particular DPCache object from an IssuerCache */
static CRLDPCache*
IssuerCache_GetDPCache(CRLIssuerCache* cache, const SECItem* dp)
{
    CRLDPCache* dpp = NULL;
    PORT_Assert(cache);
    /* XCRL for now we only support the "default" DP, ie. the
       full CRL. So we can return the global one without locking. In
       the future we will have a lock */
    PORT_Assert(NULL == dp);
    if (!cache || dp) {
        PORT_SetError(SEC_ERROR_LIBRARY_FAILURE);
        return NULL;
    }
#ifdef XCRL
    NSSRWLock_LockRead(cache->lock);
#endif
    dpp = cache->dpp;
#ifdef XCRL
    NSSRWLock_UnlockRead(cache->lock);
#endif
    return dpp;
}

/* get a DPCache object for the given issuer subject and dp
   Automatically creates the cache object if it doesn't exist yet.
   */
SECStatus
AcquireDPCache(CERTCertificate* issuer, const SECItem* subject,
               const SECItem* dp, PRTime t, void* wincx, CRLDPCache** dpcache,
               PRBool* writeLocked)
{
    SECStatus rv = SECSuccess;
    CRLIssuerCache* issuercache = NULL;
#ifdef GLOBAL_RWLOCK
    PRBool globalwrite = PR_FALSE;
#endif
    PORT_Assert(crlcache.lock);
    if (!crlcache.lock) {
        /* CRL cache is not initialized */
        PORT_SetError(SEC_ERROR_LIBRARY_FAILURE);
        return SECFailure;
    }
#ifdef GLOBAL_RWLOCK
    NSSRWLock_LockRead(crlcache.lock);
#else
    PR_Lock(crlcache.lock);
#endif
    rv = CRLCache_GetIssuerCache(&crlcache, subject, &issuercache);
    if (SECSuccess != rv) {
#ifdef GLOBAL_RWLOCK
        NSSRWLock_UnlockRead(crlcache.lock);
#else
        PR_Unlock(crlcache.lock);
#endif
        PORT_SetError(SEC_ERROR_LIBRARY_FAILURE);
        return SECFailure;
    }
    if (!issuercache) {
        /* there is no cache for this issuer yet. This means this is the
           first time we look up a cert from that issuer, and we need to
           create the cache. */

        rv = IssuerCache_Create(&issuercache, issuer, subject, dp);
        if (SECSuccess == rv && !issuercache) {
            PORT_Assert(issuercache);
            rv = SECFailure;
        }

        if (SECSuccess == rv) {
            /* This is the first time we look up a cert of this issuer.
               Create the DPCache for this DP . */
            rv = IssuerCache_AddDP(issuercache, issuer, subject, dp, dpcache);
        }

        if (SECSuccess == rv) {
            /* lock the DPCache for write to ensure the update happens in this
               thread */
            *writeLocked = PR_TRUE;
#ifdef DPC_RWLOCK
            NSSRWLock_LockWrite((*dpcache)->lock);
#else
            PR_Lock((*dpcache)->lock);
#endif
        }

        if (SECSuccess == rv) {
/* now add the new issuer cache to the global hash table of
   issuers */
#ifdef GLOBAL_RWLOCK
            CRLIssuerCache* existing = NULL;
            NSSRWLock_UnlockRead(crlcache.lock);
            /* when using a r/w lock for the global cache, check if the issuer
               already exists before adding to the hash table */
            NSSRWLock_LockWrite(crlcache.lock);
            globalwrite = PR_TRUE;
            rv = CRLCache_GetIssuerCache(&crlcache, subject, &existing);
            if (!existing) {
#endif
                rv = CRLCache_AddIssuer(issuercache);
                if (SECSuccess != rv) {
                    /* failure */
                    rv = SECFailure;
                }
#ifdef GLOBAL_RWLOCK
            } else {
                /* somebody else updated before we did */
                IssuerCache_Destroy(issuercache); /* destroy the new object */
                issuercache = existing;           /* use the existing one */
                *dpcache = IssuerCache_GetDPCache(issuercache, dp);
            }
#endif
        }

/* now unlock the global cache. We only want to lock the issuer hash
   table addition. Holding it longer would hurt scalability */
#ifdef GLOBAL_RWLOCK
        if (PR_TRUE == globalwrite) {
            NSSRWLock_UnlockWrite(crlcache.lock);
            globalwrite = PR_FALSE;
        } else {
            NSSRWLock_UnlockRead(crlcache.lock);
        }
#else
        PR_Unlock(crlcache.lock);
#endif

        /* if there was a failure adding an issuer cache object, destroy it */
        if (SECSuccess != rv && issuercache) {
            if (PR_TRUE == *writeLocked) {
#ifdef DPC_RWLOCK
                NSSRWLock_UnlockWrite((*dpcache)->lock);
#else
                PR_Unlock((*dpcache)->lock);
#endif
            }
            IssuerCache_Destroy(issuercache);
            issuercache = NULL;
        }

        if (SECSuccess != rv) {
            return SECFailure;
        }
    } else {
#ifdef GLOBAL_RWLOCK
        NSSRWLock_UnlockRead(crlcache.lock);
#else
        PR_Unlock(crlcache.lock);
#endif
        *dpcache = IssuerCache_GetDPCache(issuercache, dp);
    }
    /* we now have a DPCache that we can use for lookups */
    /* lock it for read, unless we already locked for write */
    if (PR_FALSE == *writeLocked) {
#ifdef DPC_RWLOCK
        NSSRWLock_LockRead((*dpcache)->lock);
#else
        PR_Lock((*dpcache)->lock);
#endif
    }

    if (SECSuccess == rv) {
        /* currently there is always one and only one DPCache per issuer */
        PORT_Assert(*dpcache);
        if (*dpcache) {
            /* make sure the DP cache is up to date before using it */
            rv = DPCache_GetUpToDate(*dpcache, issuer, PR_FALSE == *writeLocked,
                                     t, wincx);
        } else {
            rv = SECFailure;
        }
    }
    return rv;
}

/* unlock access to the DPCache */
void
ReleaseDPCache(CRLDPCache* dpcache, PRBool writeLocked)
{
    if (!dpcache) {
        PORT_SetError(SEC_ERROR_LIBRARY_FAILURE);
        return;
    }
#ifdef DPC_RWLOCK
    if (PR_TRUE == writeLocked) {
        NSSRWLock_UnlockWrite(dpcache->lock);
    } else {
        NSSRWLock_UnlockRead(dpcache->lock);
    }
#else
    PR_Unlock(dpcache->lock);
#endif
}

SECStatus
cert_CheckCertRevocationStatus(CERTCertificate* cert, CERTCertificate* issuer,
                               const SECItem* dp, PRTime t, void* wincx,
                               CERTRevocationStatus* revStatus,
                               CERTCRLEntryReasonCode* revReason)
{
    PRBool lockedwrite = PR_FALSE;
    SECStatus rv = SECSuccess;
    CRLDPCache* dpcache = NULL;
    CERTRevocationStatus status = certRevocationStatusRevoked;
    CERTCRLEntryReasonCode reason = crlEntryReasonUnspecified;
    CERTCrlEntry* entry = NULL;
    dpcacheStatus ds;

    if (!cert || !issuer) {
        PORT_SetError(SEC_ERROR_LIBRARY_FAILURE);
        return SECFailure;
    }

    if (revStatus) {
        *revStatus = status;
    }
    if (revReason) {
        *revReason = reason;
    }

    if (t &&
        secCertTimeValid != CERT_CheckCertValidTimes(issuer, t, PR_FALSE)) {
        /* we won't be able to check the CRL's signature if the issuer cert
           is expired as of the time we are verifying. This may cause a valid
           CRL to be cached as bad. short-circuit to avoid this case. */
        PORT_SetError(SEC_ERROR_EXPIRED_ISSUER_CERTIFICATE);
        return SECFailure;
    }

    rv = AcquireDPCache(issuer, &issuer->derSubject, dp, t, wincx, &dpcache,
                        &lockedwrite);
    PORT_Assert(SECSuccess == rv);
    if (SECSuccess != rv) {
        PORT_SetError(SEC_ERROR_LIBRARY_FAILURE);
        return SECFailure;
    }
    /* now look up the certificate SN in the DP cache's CRL */
    ds = DPCache_Lookup(dpcache, &cert->serialNumber, &entry);
    switch (ds) {
        case dpcacheFoundEntry:
            PORT_Assert(entry);
            /* check the time if we have one */
            if (entry->revocationDate.data && entry->revocationDate.len) {
                PRTime revocationDate = 0;
                if (SECSuccess ==
                    DER_DecodeTimeChoice(&revocationDate,
                                         &entry->revocationDate)) {
                    /* we got a good revocation date, only consider the
                       certificate revoked if the time we are inquiring about
                       is past the revocation date */
                    if (t >= revocationDate) {
                        rv = SECFailure;
                    } else {
                        status = certRevocationStatusValid;
                    }
                } else {
                    /* invalid revocation date, consider the certificate
                       permanently revoked */
                    rv = SECFailure;
                }
            } else {
                /* no revocation date, certificate is permanently revoked */
                rv = SECFailure;
            }
            if (SECFailure == rv) {
                (void)CERT_FindCRLEntryReasonExten(entry, &reason);
                PORT_SetError(SEC_ERROR_REVOKED_CERTIFICATE);
            }
            break;

        case dpcacheEmpty:
            /* useful for NIST policy */
            status = certRevocationStatusUnknown;
            break;

        case dpcacheNoEntry:
            status = certRevocationStatusValid;
            break;

        case dpcacheInvalidCacheError:
            /* treat it as unknown and let the caller decide based on
               the policy */
            status = certRevocationStatusUnknown;
            break;

        default:
            /* leave status as revoked */
            break;
    }

    ReleaseDPCache(dpcache, lockedwrite);
    if (revStatus) {
        *revStatus = status;
    }
    if (revReason) {
        *revReason = reason;
    }
    return rv;
}

/* check CRL revocation status of given certificate and issuer */
SECStatus
CERT_CheckCRL(CERTCertificate* cert, CERTCertificate* issuer, const SECItem* dp,
              PRTime t, void* wincx)
{
    return cert_CheckCertRevocationStatus(cert, issuer, dp, t, wincx, NULL,
                                          NULL);
}

/* retrieve full CRL object that best matches the cache status */
CERTSignedCrl*
SEC_FindCrlByName(CERTCertDBHandle* handle, SECItem* crlKey, int type)
{
    CERTSignedCrl* acrl = NULL;
    CRLDPCache* dpcache = NULL;
    SECStatus rv = SECSuccess;
    PRBool writeLocked = PR_FALSE;

    if (!crlKey) {
        PORT_SetError(SEC_ERROR_INVALID_ARGS);
        return NULL;
    }

    rv = AcquireDPCache(NULL, crlKey, NULL, 0, NULL, &dpcache, &writeLocked);
    if (SECSuccess == rv) {
        acrl = GetBestCRL(dpcache, PR_TRUE); /* decode entries, because
        SEC_FindCrlByName always returned fully decoded CRLs in the past */
        ReleaseDPCache(dpcache, writeLocked);
    }
    return acrl;
}

/* invalidate the CRL cache for a given issuer, which forces a refetch of
   CRL objects from PKCS#11 tokens */
void
CERT_CRLCacheRefreshIssuer(CERTCertDBHandle* dbhandle, SECItem* crlKey)
{
    CRLDPCache* cache = NULL;
    SECStatus rv = SECSuccess;
    PRBool writeLocked = PR_FALSE;
    PRBool readlocked;

    (void)dbhandle; /* silence compiler warnings */

    /* XCRL we will need to refresh all the DPs of the issuer in the future,
            not just the default one */
    rv = AcquireDPCache(NULL, crlKey, NULL, 0, NULL, &cache, &writeLocked);
    if (SECSuccess != rv) {
        return;
    }
    /* we need to invalidate the DPCache here */
    readlocked = (writeLocked == PR_TRUE ? PR_FALSE : PR_TRUE);
    DPCache_LockWrite();
    cache->refresh = PR_TRUE;
    DPCache_UnlockWrite();
    ReleaseDPCache(cache, writeLocked);
    return;
}

/* add the specified RAM CRL object to the cache */
SECStatus
CERT_CacheCRL(CERTCertDBHandle* dbhandle, SECItem* newdercrl)
{
    CRLDPCache* cache = NULL;
    SECStatus rv = SECSuccess;
    PRBool writeLocked = PR_FALSE;
    PRBool readlocked;
    CachedCrl* returned = NULL;
    PRBool added = PR_FALSE;
    CERTSignedCrl* newcrl = NULL;
    int realerror = 0;

    if (!dbhandle || !newdercrl) {
        PORT_SetError(SEC_ERROR_INVALID_ARGS);
        return SECFailure;
    }

    /* first decode the DER CRL to make sure it's OK */
    newcrl = CERT_DecodeDERCrlWithFlags(NULL, newdercrl, SEC_CRL_TYPE,
                                        CRL_DECODE_DONT_COPY_DER |
                                            CRL_DECODE_SKIP_ENTRIES);

    if (!newcrl) {
        return SECFailure;
    }

    /* XXX check if it has IDP extension. If so, do not proceed and set error */

    rv = AcquireDPCache(NULL, &newcrl->crl.derName, NULL, 0, NULL, &cache,
                        &writeLocked);
    if (SECSuccess == rv) {
        readlocked = (writeLocked == PR_TRUE ? PR_FALSE : PR_TRUE);

        rv = CachedCrl_Create(&returned, newcrl, CRL_OriginExplicit);
        if (SECSuccess == rv && returned) {
            DPCache_LockWrite();
            rv = DPCache_AddCRL(cache, returned, &added);
            if (PR_TRUE != added) {
                realerror = PORT_GetError();
                CachedCrl_Destroy(returned);
                returned = NULL;
            }
            DPCache_UnlockWrite();
        }

        ReleaseDPCache(cache, writeLocked);

        if (!added) {
            rv = SECFailure;
        }
    }
    SEC_DestroyCrl(newcrl); /* free the CRL. Either it got added to the cache
        and the refcount got bumped, or not, and thus we need to free its
        RAM */
    if (realerror) {
        PORT_SetError(realerror);
    }
    return rv;
}

/* remove the specified RAM CRL object from the cache */
SECStatus
CERT_UncacheCRL(CERTCertDBHandle* dbhandle, SECItem* olddercrl)
{
    CRLDPCache* cache = NULL;
    SECStatus rv = SECSuccess;
    PRBool writeLocked = PR_FALSE;
    PRBool readlocked;
    PRBool removed = PR_FALSE;
    PRUint32 i;
    CERTSignedCrl* oldcrl = NULL;

    if (!dbhandle || !olddercrl) {
        PORT_SetError(SEC_ERROR_INVALID_ARGS);
        return SECFailure;
    }

    /* first decode the DER CRL to make sure it's OK */
    oldcrl = CERT_DecodeDERCrlWithFlags(NULL, olddercrl, SEC_CRL_TYPE,
                                        CRL_DECODE_DONT_COPY_DER |
                                            CRL_DECODE_SKIP_ENTRIES);

    if (!oldcrl) {
        /* if this DER CRL can't decode, it can't be in the cache */
        return SECFailure;
    }

    rv = AcquireDPCache(NULL, &oldcrl->crl.derName, NULL, 0, NULL, &cache,
                        &writeLocked);
    if (SECSuccess == rv) {
        CachedCrl* returned = NULL;

        readlocked = (writeLocked == PR_TRUE ? PR_FALSE : PR_TRUE);

        rv = CachedCrl_Create(&returned, oldcrl, CRL_OriginExplicit);
        if (SECSuccess == rv && returned) {
            DPCache_LockWrite();
            for (i = 0; i < cache->ncrls; i++) {
                PRBool dupe = PR_FALSE, updated = PR_FALSE;
                rv = CachedCrl_Compare(returned, cache->crls[i], &dupe,
                                       &updated);
                if (SECSuccess != rv) {
                    PORT_SetError(SEC_ERROR_LIBRARY_FAILURE);
                    break;
                }
                if (PR_TRUE == dupe) {
                    rv = DPCache_RemoveCRL(cache, i); /* got a match */
                    if (SECSuccess == rv) {
                        cache->mustchoose = PR_TRUE;
                        removed = PR_TRUE;
                    }
                    break;
                }
            }

            DPCache_UnlockWrite();

            if (SECSuccess != CachedCrl_Destroy(returned)) {
                rv = SECFailure;
            }
        }

        ReleaseDPCache(cache, writeLocked);
    }
    if (SECSuccess != SEC_DestroyCrl(oldcrl)) {
        /* need to do this because object is refcounted */
        rv = SECFailure;
    }
    if (SECSuccess == rv && PR_TRUE != removed) {
        PORT_SetError(SEC_ERROR_CRL_NOT_FOUND);
    }
    return rv;
}

SECStatus
cert_AcquireNamedCRLCache(NamedCRLCache** returned)
{
    PORT_Assert(returned);
    if (!namedCRLCache.lock) {
        PORT_Assert(0);
        return SECFailure;
    }
    PR_Lock(namedCRLCache.lock);
    *returned = &namedCRLCache;
    return SECSuccess;
}

/* This must be called only while cache is acquired, and the entry is only
 * valid until cache is released.
 */
SECStatus
cert_FindCRLByGeneralName(NamedCRLCache* ncc, const SECItem* canonicalizedName,
                          NamedCRLCacheEntry** retEntry)
{
    if (!ncc || !canonicalizedName || !retEntry) {
        PORT_SetError(SEC_ERROR_INVALID_ARGS);
        return SECFailure;
    }
    *retEntry = (NamedCRLCacheEntry*)PL_HashTableLookup(
        namedCRLCache.entries, (void*)canonicalizedName);
    return SECSuccess;
}

SECStatus
cert_ReleaseNamedCRLCache(NamedCRLCache* ncc)
{
    if (!ncc) {
        return SECFailure;
    }
    if (!ncc->lock) {
        PORT_Assert(0);
        return SECFailure;
    }
    PR_Unlock(namedCRLCache.lock);
    return SECSuccess;
}

/* creates new named cache entry from CRL, and tries to add it to CRL cache */
static SECStatus
addCRLToCache(CERTCertDBHandle* dbhandle, SECItem* crl,
              const SECItem* canonicalizedName, NamedCRLCacheEntry** newEntry)
{
    SECStatus rv = SECSuccess;
    NamedCRLCacheEntry* entry = NULL;

    /* create new named entry */
    if (SECSuccess != NamedCRLCacheEntry_Create(newEntry) || !*newEntry) {
        /* no need to keep unused CRL around */
        SECITEM_ZfreeItem(crl, PR_TRUE);
        return SECFailure;
    }
    entry = *newEntry;
    entry->crl = crl; /* named CRL cache owns DER */
    entry->lastAttemptTime = PR_Now();
    entry->canonicalizedName = SECITEM_DupItem(canonicalizedName);
    if (!entry->canonicalizedName) {
        rv = NamedCRLCacheEntry_Destroy(entry); /* destroys CRL too */
        PORT_Assert(SECSuccess == rv);
        return SECFailure;
    }
    /* now, attempt to insert CRL into CRL cache */
    if (SECSuccess == CERT_CacheCRL(dbhandle, entry->crl)) {
        entry->inCRLCache = PR_TRUE;
        entry->successfulInsertionTime = entry->lastAttemptTime;
    } else {
        switch (PR_GetError()) {
            case SEC_ERROR_CRL_ALREADY_EXISTS:
                entry->dupe = PR_TRUE;
                break;

            case SEC_ERROR_BAD_DER:
                entry->badDER = PR_TRUE;
                break;

            /* all other reasons */
            default:
                entry->unsupported = PR_TRUE;
                break;
        }
        rv = SECFailure;
        /* no need to keep unused CRL around */
        SECITEM_ZfreeItem(entry->crl, PR_TRUE);
        entry->crl = NULL;
    }
    return rv;
}

/* take ownership of CRL, and insert it into the named CRL cache
 * and indexed CRL cache
 */
SECStatus
cert_CacheCRLByGeneralName(CERTCertDBHandle* dbhandle, SECItem* crl,
                           const SECItem* canonicalizedName)
{
    NamedCRLCacheEntry *oldEntry, *newEntry = NULL;
    NamedCRLCache* ncc = NULL;
    SECStatus rv = SECSuccess;

    PORT_Assert(namedCRLCache.lock);
    PORT_Assert(namedCRLCache.entries);

    if (!crl || !canonicalizedName) {
        PORT_Assert(0);
        PORT_SetError(SEC_ERROR_INVALID_ARGS);
        return SECFailure;
    }

    rv = cert_AcquireNamedCRLCache(&ncc);
    PORT_Assert(SECSuccess == rv);
    if (SECSuccess != rv) {
        SECITEM_ZfreeItem(crl, PR_TRUE);
        return SECFailure;
    }
    rv = cert_FindCRLByGeneralName(ncc, canonicalizedName, &oldEntry);
    PORT_Assert(SECSuccess == rv);
    if (SECSuccess != rv) {
        (void)cert_ReleaseNamedCRLCache(ncc);
        SECITEM_ZfreeItem(crl, PR_TRUE);
        return SECFailure;
    }
    if (SECSuccess ==
        addCRLToCache(dbhandle, crl, canonicalizedName, &newEntry)) {
        if (!oldEntry) {
            /* add new good entry to the hash table */
            if (NULL == PL_HashTableAdd(namedCRLCache.entries,
                                        (void*)newEntry->canonicalizedName,
                                        (void*)newEntry)) {
                PORT_Assert(0);
                NamedCRLCacheEntry_Destroy(newEntry);
                rv = SECFailure;
            }
        } else {
            PRBool removed;
            /* remove the old CRL from the cache if needed */
            if (oldEntry->inCRLCache) {
                rv = CERT_UncacheCRL(dbhandle, oldEntry->crl);
                PORT_Assert(SECSuccess == rv);
            }
            removed = PL_HashTableRemove(namedCRLCache.entries,
                                         (void*)oldEntry->canonicalizedName);
            PORT_Assert(removed);
            if (!removed) {
                rv = SECFailure;
                /* leak old entry since we couldn't remove it from the hash
                 * table */
            } else {
                PORT_CheckSuccess(NamedCRLCacheEntry_Destroy(oldEntry));
            }
            if (NULL == PL_HashTableAdd(namedCRLCache.entries,
                                        (void*)newEntry->canonicalizedName,
                                        (void*)newEntry)) {
                PORT_Assert(0);
                rv = SECFailure;
            }
        }
    } else {
        /* error adding new CRL to cache */
        if (!oldEntry) {
            /* no old cache entry, use the new one even though it's bad */
            if (NULL == PL_HashTableAdd(namedCRLCache.entries,
                                        (void*)newEntry->canonicalizedName,
                                        (void*)newEntry)) {
                PORT_Assert(0);
                rv = SECFailure;
            }
        } else {
            if (oldEntry->inCRLCache) {
                /* previous cache entry was good, keep it and update time */
                oldEntry->lastAttemptTime = newEntry->lastAttemptTime;
                /* throw away new bad entry */
                rv = NamedCRLCacheEntry_Destroy(newEntry);
                PORT_Assert(SECSuccess == rv);
            } else {
                /* previous cache entry was bad, just replace it */
                PRBool removed = PL_HashTableRemove(
                    namedCRLCache.entries, (void*)oldEntry->canonicalizedName);
                PORT_Assert(removed);
                if (!removed) {
                    /* leak old entry since we couldn't remove it from the hash
                     * table */
                    rv = SECFailure;
                } else {
                    PORT_CheckSuccess(NamedCRLCacheEntry_Destroy(oldEntry));
                }
                if (NULL == PL_HashTableAdd(namedCRLCache.entries,
                                            (void*)newEntry->canonicalizedName,
                                            (void*)newEntry)) {
                    PORT_Assert(0);
                    rv = SECFailure;
                }
            }
        }
    }
    PORT_CheckSuccess(cert_ReleaseNamedCRLCache(ncc));

    return rv;
}

static SECStatus
CachedCrl_Create(CachedCrl** returned, CERTSignedCrl* crl, CRLOrigin origin)
{
    CachedCrl* newcrl = NULL;
    if (!returned) {
        PORT_SetError(SEC_ERROR_LIBRARY_FAILURE);
        return SECFailure;
    }
    newcrl = PORT_ZAlloc(sizeof(CachedCrl));
    if (!newcrl) {
        return SECFailure;
    }
    newcrl->crl = SEC_DupCrl(crl);
    newcrl->origin = origin;
    *returned = newcrl;
    return SECSuccess;
}

/* empty the cache content */
static SECStatus
CachedCrl_Depopulate(CachedCrl* crl)
{
    if (!crl) {
        PORT_SetError(SEC_ERROR_LIBRARY_FAILURE);
        return SECFailure;
    }
    /* destroy the hash table */
    if (crl->entries) {
        PL_HashTableDestroy(crl->entries);
        crl->entries = NULL;
    }

    /* free the pre buffer */
    if (crl->prebuffer) {
        PreAllocator_Destroy(crl->prebuffer);
        crl->prebuffer = NULL;
    }
    return SECSuccess;
}

static SECStatus
CachedCrl_Destroy(CachedCrl* crl)
{
    if (!crl) {
        PORT_SetError(SEC_ERROR_LIBRARY_FAILURE);
        return SECFailure;
    }
    CachedCrl_Depopulate(crl);
    SEC_DestroyCrl(crl->crl);
    PORT_Free(crl);
    return SECSuccess;
}

/* create hash table of CRL entries */
static SECStatus
CachedCrl_Populate(CachedCrl* crlobject)
{
    SECStatus rv = SECFailure;
    CERTCrlEntry** crlEntry = NULL;
    PRUint32 numEntries = 0;

    if (!crlobject) {
        PORT_SetError(SEC_ERROR_LIBRARY_FAILURE);
        return SECFailure;
    }
    /* complete the entry decoding . XXX thread-safety of CRL object */
    rv = CERT_CompleteCRLDecodeEntries(crlobject->crl);
    if (SECSuccess != rv) {
        crlobject->unbuildable = PR_TRUE; /* don't try to build this again */
        return SECFailure;
    }

    if (crlobject->entries && crlobject->prebuffer) {
        /* cache is already built */
        return SECSuccess;
    }

    /* build the hash table from the full CRL */
    /* count CRL entries so we can pre-allocate space for hash table entries */
    for (crlEntry = crlobject->crl->crl.entries; crlEntry && *crlEntry;
         crlEntry++) {
        numEntries++;
    }
    crlobject->prebuffer =
        PreAllocator_Create(numEntries * sizeof(PLHashEntry));
    PORT_Assert(crlobject->prebuffer);
    if (!crlobject->prebuffer) {
        return SECFailure;
    }
    /* create a new hash table */
    crlobject->entries =
        PL_NewHashTable(0, SECITEM_Hash, SECITEM_HashCompare, PL_CompareValues,
                        &preAllocOps, crlobject->prebuffer);
    PORT_Assert(crlobject->entries);
    if (!crlobject->entries) {
        return SECFailure;
    }
    /* add all serial numbers to the hash table */
    for (crlEntry = crlobject->crl->crl.entries; crlEntry && *crlEntry;
         crlEntry++) {
        PL_HashTableAdd(crlobject->entries, &(*crlEntry)->serialNumber,
                        *crlEntry);
    }

    return SECSuccess;
}

/* returns true if there are CRLs from PKCS#11 slots */
static PRBool
DPCache_HasTokenCRLs(CRLDPCache* cache)
{
    PRBool answer = PR_FALSE;
    PRUint32 i;
    for (i = 0; i < cache->ncrls; i++) {
        if (cache->crls[i] && (CRL_OriginToken == cache->crls[i]->origin)) {
            answer = PR_TRUE;
            break;
        }
    }
    return answer;
}

/* are these CRLs the same, as far as the cache is concerned ? */
/* are these CRLs the same token object but with different DER ?
   This can happen if the DER CRL got updated in the token, but the PKCS#11
   object ID did not change. NSS softoken has the unfortunate property to
   never change the object ID for CRL objects. */
static SECStatus
CachedCrl_Compare(CachedCrl* a, CachedCrl* b, PRBool* isDupe, PRBool* isUpdated)
{
    PORT_Assert(a);
    PORT_Assert(b);
    PORT_Assert(isDupe);
    PORT_Assert(isUpdated);
    if (!a || !b || !isDupe || !isUpdated || !a->crl || !b->crl) {
        PORT_SetError(SEC_ERROR_LIBRARY_FAILURE);
        return SECFailure;
    }

    *isDupe = *isUpdated = PR_FALSE;

    if (a == b) {
        /* dupe */
        *isDupe = PR_TRUE;
        *isUpdated = PR_FALSE;
        return SECSuccess;
    }
    if (b->origin != a->origin) {
        /* CRLs of different origins are not considered dupes,
           and can't be updated either */
        return SECSuccess;
    }
    if (CRL_OriginToken == b->origin) {
        /* for token CRLs, slot and PKCS#11 object handle must match for CRL
           to truly be a dupe */
        if ((b->crl->slot == a->crl->slot) &&
            (b->crl->pkcs11ID == a->crl->pkcs11ID)) {
            /* ASN.1 DER needs to match for dupe check */
            /* could optimize by just checking a few fields like thisUpdate */
            if (SECEqual ==
                SECITEM_CompareItem(b->crl->derCrl, a->crl->derCrl)) {
                *isDupe = PR_TRUE;
            } else {
                *isUpdated = PR_TRUE;
            }
        }
        return SECSuccess;
    }
    if (CRL_OriginExplicit == b->origin) {
        /* We need to make sure this is the same object that the user provided
           to CERT_CacheCRL previously. That API takes a SECItem*, thus, we
           just do a pointer comparison here.
        */
        if (b->crl->derCrl == a->crl->derCrl) {
            *isDupe = PR_TRUE;
        }
    }
    return SECSuccess;
}