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.

Untracked file

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
/*
 * The contents of this file are subject to the Mozilla Public
 * License Version 1.1 (the "License"); you may not use this file
 * except in compliance with the License. You may obtain a copy of
 * the License at http://www.mozilla.org/MPL/
 * 
 * Software distributed under the License is distributed on an "AS
 * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
 * implied. See the License for the specific language governing
 * rights and limitations under the License.
 * 
 * The Original Code is the Netscape security libraries.
 * 
 * The Initial Developer of the Original Code is Netscape
 * Communications Corporation.  Portions created by Netscape are 
 * Copyright (C) 1994-2000 Netscape Communications Corporation.  All
 * Rights Reserved.
 * 
 * Contributor(s):
 * 
 * Alternatively, the contents of this file may be used under the
 * terms of the GNU General Public License Version 2 or later (the
 * "GPL"), in which case the provisions of the GPL are applicable 
 * instead of those above.  If you wish to allow use of your 
 * version of this file only under the terms of the GPL and not to
 * allow others to use your version of this file under the MPL,
 * indicate your decision by deleting the provisions above and
 * replace them with the notice and other provisions required by
 * the GPL.  If you do not delete the provisions above, a recipient
 * may use your version of this file under either the MPL or the
 * GPL.
 */
/*
 * Initialize the PCKS 11 subsystem
 */
#include "seccomon.h"
#include "secmod.h"
#include "nssilock.h"
#include "secmodi.h"
#include "pk11func.h"
#include "pki3hack.h"
#include "secerr.h"

/* these are for displaying error messages */

static  SECMODModuleList *modules = NULL;
static  SECMODModuleList *modulesDB = NULL;
static  SECMODModuleList *modulesUnload = NULL;
static  SECMODModule *internalModule = NULL;
static  SECMODModule *defaultDBModule = NULL;
static  SECMODModule *pendingModule = NULL;
static SECMODListLock *moduleLock = NULL;

int secmod_PrivateModuleCount = 0;

extern PK11DefaultArrayEntry PK11_DefaultArray[];
extern int num_pk11_default_mechanisms;


void
SECMOD_Init() 
{
    /* don't initialize twice */
    if (moduleLock) return;

    moduleLock = SECMOD_NewListLock();
    PK11_InitSlotLists();
}


SECStatus
SECMOD_Shutdown() 
{
    /* destroy the lock */
    if (moduleLock) {
	SECMOD_DestroyListLock(moduleLock);
	moduleLock = NULL;
    }
    /* free the internal module */
    if (internalModule) {
	SECMOD_DestroyModule(internalModule);
	internalModule = NULL;
    }

    /* free the default database module */
    if (defaultDBModule) {
	SECMOD_DestroyModule(defaultDBModule);
	defaultDBModule = NULL;
    }
	
    /* destroy the list */
    if (modules) {
	SECMOD_DestroyModuleList(modules);
	modules = NULL;
    }
   
    if (modulesDB) {
	SECMOD_DestroyModuleList(modulesDB);
	modulesDB = NULL;
    }

    if (modulesUnload) {
	SECMOD_DestroyModuleList(modulesUnload);
	modulesUnload = NULL;
    }

    /* make all the slots and the lists go away */
    PK11_DestroySlotLists();

    nss_DumpModuleLog();

#ifdef DEBUG
    if (PR_GetEnv("NSS_STRICT_SHUTDOWN")) {
	PORT_Assert(secmod_PrivateModuleCount == 0);
    }
#endif
    if (secmod_PrivateModuleCount) {
    	PORT_SetError(SEC_ERROR_BUSY);
	return SECFailure;
    }
    return SECSuccess;
}


/*
 * retrieve the internal module
 */
SECMODModule *
SECMOD_GetInternalModule(void)
{
   return internalModule;
}


SECStatus
secmod_AddModuleToList(SECMODModuleList **moduleList,SECMODModule *newModule)
{
    SECMODModuleList *mlp, *newListElement, *last = NULL;

    newListElement = SECMOD_NewModuleListElement();
    if (newListElement == NULL) {
	return SECFailure;
    }

    newListElement->module = SECMOD_ReferenceModule(newModule);

    SECMOD_GetWriteLock(moduleLock);
    /* Added it to the end (This is very inefficient, but Adding a module
     * on the fly should happen maybe 2-3 times through the life this program
     * on a given computer, and this list should be *SHORT*. */
    for(mlp = *moduleList; mlp != NULL; mlp = mlp->next) {
	last = mlp;
    }

    if (last == NULL) {
	*moduleList = newListElement;
    } else {
	SECMOD_AddList(last,newListElement,NULL);
    }
    SECMOD_ReleaseWriteLock(moduleLock);
    return SECSuccess;
}

SECStatus
SECMOD_AddModuleToList(SECMODModule *newModule)
{
    if (newModule->internal && !internalModule) {
	internalModule = SECMOD_ReferenceModule(newModule);
    }
    return secmod_AddModuleToList(&modules,newModule);
}

SECStatus
SECMOD_AddModuleToDBOnlyList(SECMODModule *newModule)
{
    if (defaultDBModule == NULL) {
	defaultDBModule = SECMOD_ReferenceModule(newModule);
    }
    return secmod_AddModuleToList(&modulesDB,newModule);
}

SECStatus
SECMOD_AddModuleToUnloadList(SECMODModule *newModule)
{
    return secmod_AddModuleToList(&modulesUnload,newModule);
}

/*
 * get the list of PKCS11 modules that are available.
 */
SECMODModuleList * SECMOD_GetDefaultModuleList() { return modules; }
SECMODModuleList *SECMOD_GetDeadModuleList() { return modulesUnload; }
SECMODModuleList *SECMOD_GetDBModuleList() { return modulesDB; }

/*
 * This lock protects the global module lists.
 * it also protects changes to the slot array (module->slots[]) and slot count 
 * (module->slotCount) in each module. It is a read/write lock with multiple 
 * readers or one writer. Writes are uncommon. 
 * Because of legacy considerations protection of the slot array and count is 
 * only necessary in applications if the application calls 
 * SECMOD_UpdateSlotList() or SECMOD_WaitForAnyTokenEvent(), though all new
 * applications are encouraged to acquire this lock when reading the
 * slot array information directly.
 */
SECMODListLock *SECMOD_GetDefaultModuleListLock() { return moduleLock; }



/*
 * find a module by name, and add a reference to it.
 * return that module.
 */
SECMODModule *
SECMOD_FindModule(const char *name)
{
    SECMODModuleList *mlp;
    SECMODModule *module = NULL;

    SECMOD_GetReadLock(moduleLock);
    for(mlp = modules; mlp != NULL; mlp = mlp->next) {
	if (PORT_Strcmp(name,mlp->module->commonName) == 0) {
	    module = mlp->module;
	    SECMOD_ReferenceModule(module);
	    break;
	}
    }
    if (module) {
	goto found;
    }
    for(mlp = modulesUnload; mlp != NULL; mlp = mlp->next) {
	if (PORT_Strcmp(name,mlp->module->commonName) == 0) {
	    module = mlp->module;
	    SECMOD_ReferenceModule(module);
	    break;
	}
    }

found:
    SECMOD_ReleaseReadLock(moduleLock);

    return module;
}

/*
 * find a module by ID, and add a reference to it.
 * return that module.
 */
SECMODModule *
SECMOD_FindModuleByID(SECMODModuleID id) 
{
    SECMODModuleList *mlp;
    SECMODModule *module = NULL;

    SECMOD_GetReadLock(moduleLock);
    for(mlp = modules; mlp != NULL; mlp = mlp->next) {
	if (id == mlp->module->moduleID) {
	    module = mlp->module;
	    SECMOD_ReferenceModule(module);
	    break;
	}
    }
    SECMOD_ReleaseReadLock(moduleLock);
    if (module == NULL) {
	PORT_SetError(SEC_ERROR_NO_MODULE);
    }
    return module;
}

/*
 * Find the Slot based on ID and the module.
 */
PK11SlotInfo *
SECMOD_FindSlotByID(SECMODModule *module, CK_SLOT_ID slotID)
{
    int i;
    PK11SlotInfo *slot = NULL;

    SECMOD_GetReadLock(moduleLock);
    for (i=0; i < module->slotCount; i++) {
	PK11SlotInfo *cSlot = module->slots[i];

	if (cSlot->slotID == slotID) {
	    slot = PK11_ReferenceSlot(cSlot);
	    break;
	}
    }
    SECMOD_ReleaseReadLock(moduleLock);

    if (slot == NULL) {
	PORT_SetError(SEC_ERROR_NO_SLOT_SELECTED);
    }
    return slot;
}

/*
 * lookup the Slot module based on it's module ID and slot ID.
 */
PK11SlotInfo *
SECMOD_LookupSlot(SECMODModuleID moduleID,CK_SLOT_ID slotID) 
{
    SECMODModule *module;
    PK11SlotInfo *slot;

    module = SECMOD_FindModuleByID(moduleID);
    if (module == NULL) return NULL;

    slot = SECMOD_FindSlotByID(module, slotID);
    SECMOD_DestroyModule(module);
    return slot;
}


/*
 * find a module by name or module pointer and delete it off the module list.
 * optionally remove it from secmod.db.
 */
SECStatus
SECMOD_DeleteModuleEx(const char *name, SECMODModule *mod, 
						int *type, PRBool permdb) 
{
    SECMODModuleList *mlp;
    SECMODModuleList **mlpp;
    SECStatus rv = SECFailure;

    *type = SECMOD_EXTERNAL;

    SECMOD_GetWriteLock(moduleLock);
    for (mlpp = &modules,mlp = modules; 
				mlp != NULL; mlpp = &mlp->next, mlp = *mlpp) {
	if ((name && (PORT_Strcmp(name,mlp->module->commonName) == 0)) ||
							mod == mlp->module) {
	    /* don't delete the internal module */
	    if (!mlp->module->internal) {
		SECMOD_RemoveList(mlpp,mlp);
		/* delete it after we release the lock */
		rv = STAN_RemoveModuleFromDefaultTrustDomain(mlp->module);
	    } else if (mlp->module->isFIPS) {
		*type = SECMOD_FIPS;
	    } else {
		*type = SECMOD_INTERNAL;
	    }
	    break;
	}
    }
    if (mlp) {
	goto found;
    }
    /* not on the internal list, check the unload list */
    for (mlpp = &modulesUnload,mlp = modulesUnload; 
				mlp != NULL; mlpp = &mlp->next, mlp = *mlpp) {
	if ((name && (PORT_Strcmp(name,mlp->module->commonName) == 0)) ||
							mod == mlp->module) {
	    /* don't delete the internal module */
	    if (!mlp->module->internal) {
		SECMOD_RemoveList(mlpp,mlp);
		rv = SECSuccess;
	    } else if (mlp->module->isFIPS) {
		*type = SECMOD_FIPS;
	    } else {
		*type = SECMOD_INTERNAL;
	    }
	    break;
	}
    }
found:
    SECMOD_ReleaseWriteLock(moduleLock);


    if (rv == SECSuccess) {
	if (permdb) {
 	    SECMOD_DeletePermDB(mlp->module);
	}
	SECMOD_DestroyModuleListElement(mlp);
    }
    return rv;
}

/*
 * find a module by name and delete it off the module list
 */
SECStatus
SECMOD_DeleteModule(const char *name, int *type) 
{
    return SECMOD_DeleteModuleEx(name, NULL, type, PR_TRUE);
}

/*
 * find a module by name and delete it off the module list
 */
SECStatus
SECMOD_DeleteInternalModule(const char *name) 
{
    SECMODModuleList *mlp;
    SECMODModuleList **mlpp;
    SECStatus rv = SECFailure;

    if (pendingModule) {
	PORT_SetError(SEC_ERROR_MODULE_STUCK);
	return rv;
    }

    SECMOD_GetWriteLock(moduleLock);
    for(mlpp = &modules,mlp = modules; 
				mlp != NULL; mlpp = &mlp->next, mlp = *mlpp) {
	if (PORT_Strcmp(name,mlp->module->commonName) == 0) {
	    /* don't delete the internal module */
	    if (mlp->module->internal) {
		SECMOD_RemoveList(mlpp,mlp);
		rv = STAN_RemoveModuleFromDefaultTrustDomain(mlp->module);
	    } 
	    break;
	}
    }
    SECMOD_ReleaseWriteLock(moduleLock);

    if (rv == SECSuccess) {
	SECMODModule *newModule,*oldModule;

	if (mlp->module->isFIPS) {
    	    newModule = SECMOD_CreateModule(NULL, SECMOD_INT_NAME,
				NULL, SECMOD_INT_FLAGS);
	} else {
    	    newModule = SECMOD_CreateModule(NULL, SECMOD_FIPS_NAME,
				NULL, SECMOD_FIPS_FLAGS);
	}
	if (newModule) {
	    newModule->libraryParams = 
	     PORT_ArenaStrdup(newModule->arena,mlp->module->libraryParams);
	    rv = SECMOD_AddModule(newModule);
	    if (rv != SECSuccess) {
		SECMOD_DestroyModule(newModule);
		newModule = NULL;
	    }
	}
	if (newModule == NULL) {
	    SECMODModuleList *last = NULL,*mlp2;
	   /* we're in pretty deep trouble if this happens...Security
	    * not going to work well... try to put the old module back on
	    * the list */
	   SECMOD_GetWriteLock(moduleLock);
	   for(mlp2 = modules; mlp2 != NULL; mlp2 = mlp->next) {
		last = mlp2;
	   }

	   if (last == NULL) {
		modules = mlp;
	   } else {
		SECMOD_AddList(last,mlp,NULL);
	   }
	   SECMOD_ReleaseWriteLock(moduleLock);
	   return SECFailure; 
	}
	pendingModule = oldModule = internalModule;
	internalModule = NULL;
	SECMOD_DestroyModule(oldModule);
 	SECMOD_DeletePermDB(mlp->module);
	SECMOD_DestroyModuleListElement(mlp);
	internalModule = newModule; /* adopt the module */
    }
    return rv;
}

SECStatus
SECMOD_AddModule(SECMODModule *newModule) 
{
    SECStatus rv;
    SECMODModule *oldModule;

    /* Test if a module w/ the same name already exists */
    /* and return SECWouldBlock if so. */
    /* We should probably add a new return value such as */
    /* SECDublicateModule, but to minimize ripples, I'll */
    /* give SECWouldBlock a new meaning */
    if ((oldModule = SECMOD_FindModule(newModule->commonName)) != NULL) {
	SECMOD_DestroyModule(oldModule);
        return SECWouldBlock;
        /* module already exists. */
    }

    rv = SECMOD_LoadPKCS11Module(newModule);
    if (rv != SECSuccess) {
	return rv;
    }

    if (newModule->parent == NULL) {
	newModule->parent = SECMOD_ReferenceModule(defaultDBModule);
    }

    SECMOD_AddPermDB(newModule);
    SECMOD_AddModuleToList(newModule);

    rv = STAN_AddModuleToDefaultTrustDomain(newModule);

    return rv;
}

PK11SlotInfo *
SECMOD_FindSlot(SECMODModule *module,const char *name) 
{
    int i;
    char *string;
    PK11SlotInfo *retSlot = NULL;

    SECMOD_GetReadLock(moduleLock);
    for (i=0; i < module->slotCount; i++) {
	PK11SlotInfo *slot = module->slots[i];

	if (PK11_IsPresent(slot)) {
	    string = PK11_GetTokenName(slot);
	} else {
	    string = PK11_GetSlotName(slot);
	}
	if (PORT_Strcmp(name,string) == 0) {
	    retSlot = PK11_ReferenceSlot(slot);
	    break;
	}
    }
    SECMOD_ReleaseReadLock(moduleLock);

    if (retSlot == NULL) {
	PORT_SetError(SEC_ERROR_NO_SLOT_SELECTED);
    }
    return retSlot;
}

SECStatus
PK11_GetModInfo(SECMODModule *mod,CK_INFO *info)
{
    CK_RV crv;

    if (mod->functionList == NULL) return SECFailure;
    crv = PK11_GETTAB(mod)->C_GetInfo(info);
    if (crv != CKR_OK) {
	PORT_SetError(PK11_MapError(crv));
    }	
    return (crv == CKR_OK) ? SECSuccess : SECFailure;
}

/* Determine if we have the FIP's module loaded as the default
 * module to trigger other bogus FIPS requirements in PKCS #12 and
 * SSL
 */
PRBool
PK11_IsFIPS(void)
{
    SECMODModule *mod = SECMOD_GetInternalModule();

    if (mod && mod->internal) {
	return mod->isFIPS;
    }

    return PR_FALSE;
}

/* combines NewModule() & AddModule */
/* give a string for the module name & the full-path for the dll, */
/* installs the PKCS11 module & update registry */
SECStatus 
SECMOD_AddNewModuleEx(const char* moduleName, const char* dllPath,
                              unsigned long defaultMechanismFlags,
                              unsigned long cipherEnableFlags,
                              char* modparms, char* nssparms)
{
    SECMODModule *module;
    SECStatus result = SECFailure;
    int s,i;
    PK11SlotInfo* slot;

    PR_SetErrorText(0, NULL);

    module = SECMOD_CreateModule(dllPath, moduleName, modparms, nssparms);

    if (module == NULL) {
	return result;
    }

    if (module->dllName != NULL) {
        if (module->dllName[0] != 0) {
            result = SECMOD_AddModule(module);
            if (result == SECSuccess) {
                /* turn on SSL cipher enable flags */
                module->ssl[0] = cipherEnableFlags;

 		SECMOD_GetReadLock(moduleLock);
                /* check each slot to turn on appropriate mechanisms */
                for (s = 0; s < module->slotCount; s++) {
                    slot = (module->slots)[s];
                    /* for each possible mechanism */
                    for (i=0; i < num_pk11_default_mechanisms; i++) {
                        /* we are told to turn it on by default ? */
			PRBool add = 
			 (PK11_DefaultArray[i].flag & defaultMechanismFlags) ?
						PR_TRUE: PR_FALSE;
                        result = PK11_UpdateSlotAttribute(slot, 
					&(PK11_DefaultArray[i]),  add);
                    } /* for each mechanism */
                    /* disable each slot if the defaultFlags say so */
                    if (defaultMechanismFlags & PK11_DISABLE_FLAG) {
                        PK11_UserDisableSlot(slot);
                    }
                } /* for each slot of this module */
 		SECMOD_ReleaseReadLock(moduleLock);

                /* delete and re-add module in order to save changes 
		 * to the module */
		result = SECMOD_UpdateModule(module);
            }
        }
    }
    SECMOD_DestroyModule(module);
    return result;
}

SECStatus 
SECMOD_AddNewModule(const char* moduleName, const char* dllPath,
                              unsigned long defaultMechanismFlags,
                              unsigned long cipherEnableFlags)
{
    return SECMOD_AddNewModuleEx(moduleName, dllPath, defaultMechanismFlags,
                  cipherEnableFlags, 
                  NULL, NULL); /* don't pass module or nss params */
}

SECStatus 
SECMOD_UpdateModule(SECMODModule *module)
{
    SECStatus result;

    result = SECMOD_DeletePermDB(module);
                
    if (result == SECSuccess) {          
	result = SECMOD_AddPermDB(module);
    }
    return result;
}

/* Public & Internal(Security Library)  representation of
 * encryption mechanism flags conversion */

/* Currently, the only difference is that internal representation 
 * puts RANDOM_FLAG at bit 31 (Most-significant bit), but
 * public representation puts this bit at bit 28
 */
unsigned long 
SECMOD_PubMechFlagstoInternal(unsigned long publicFlags)
{
    unsigned long internalFlags = publicFlags;

    if (publicFlags & PUBLIC_MECH_RANDOM_FLAG) {
        internalFlags &= ~PUBLIC_MECH_RANDOM_FLAG;
        internalFlags |= SECMOD_RANDOM_FLAG;
    }
    return internalFlags;
}

unsigned long 
SECMOD_InternaltoPubMechFlags(unsigned long internalFlags) 
{
    unsigned long publicFlags = internalFlags;

    if (internalFlags & SECMOD_RANDOM_FLAG) {
        publicFlags &= ~SECMOD_RANDOM_FLAG;
        publicFlags |= PUBLIC_MECH_RANDOM_FLAG;
    }
    return publicFlags;
}


/* Public & Internal(Security Library)  representation of */
/* cipher flags conversion */
/* Note: currently they are just stubs */
unsigned long 
SECMOD_PubCipherFlagstoInternal(unsigned long publicFlags) 
{
    return publicFlags;
}

unsigned long 
SECMOD_InternaltoPubCipherFlags(unsigned long internalFlags) 
{
    return internalFlags;
}

/* Funtion reports true if module of modType is installed/configured */
PRBool 
SECMOD_IsModulePresent( unsigned long int pubCipherEnableFlags )
{
    PRBool result = PR_FALSE;
    SECMODModuleList *mods = SECMOD_GetDefaultModuleList();
    SECMOD_GetReadLock(moduleLock);


    for ( ; mods != NULL; mods = mods->next) {
        if (mods->module->ssl[0] & 
		SECMOD_PubCipherFlagstoInternal(pubCipherEnableFlags)) {
            result = PR_TRUE;
        }
    }

    SECMOD_ReleaseReadLock(moduleLock);
    return result;
}

/* create a new ModuleListElement */
SECMODModuleList *SECMOD_NewModuleListElement(void) 
{
    SECMODModuleList *newModList;

    newModList= (SECMODModuleList *) PORT_Alloc(sizeof(SECMODModuleList));
    if (newModList) {
	newModList->next = NULL;
	newModList->module = NULL;
    }
    return newModList;
}

/*
 * make a new reference to a module so It doesn't go away on us
 */
SECMODModule *
SECMOD_ReferenceModule(SECMODModule *module) 
{
    PK11_USE_THREADS(PZ_Lock((PZLock *)module->refLock);)
    PORT_Assert(module->refCount > 0);

    module->refCount++;
    PK11_USE_THREADS(PZ_Unlock((PZLock*)module->refLock);)
    return module;
}


/* destroy an existing module */
void
SECMOD_DestroyModule(SECMODModule *module) 
{
    PRBool willfree = PR_FALSE;
    int slotCount;
    int i;

    PK11_USE_THREADS(PZ_Lock((PZLock *)module->refLock);)
    if (module->refCount-- == 1) {
	willfree = PR_TRUE;
    }
    PORT_Assert(willfree || (module->refCount > 0));
    PK11_USE_THREADS(PZ_Unlock((PZLock *)module->refLock);)

    if (!willfree) {
	return;
    }
   
    if (module->parent != NULL) {
	SECMODModule *parent = module->parent;
	/* paranoia, don't loop forever if the modules are looped */
	module->parent = NULL;
	SECMOD_DestroyModule(parent);
    }

    /* slots can't really disappear until our module starts freeing them,
     * so this check is safe */
    slotCount = module->slotCount;
    if (slotCount == 0) {
	SECMOD_SlotDestroyModule(module,PR_FALSE);
	return;
    }

    /* now free all out slots, when they are done, they will cause the
     * module to disappear altogether */
    for (i=0 ; i < slotCount; i++) {
	if (!module->slots[i]->disabled) {
		PK11_ClearSlotList(module->slots[i]);
	}
	PK11_FreeSlot(module->slots[i]);
    }
    /* WARNING: once the last slot has been freed is it possible (even likely)
     * that module is no more... touching it now is a good way to go south */
}


/* we can only get here if we've destroyed the module, or some one has
 * erroneously freed a slot that wasn't referenced. */
void
SECMOD_SlotDestroyModule(SECMODModule *module, PRBool fromSlot) 
{
    PRBool willfree = PR_FALSE;
    if (fromSlot) {
        PORT_Assert(module->refCount == 0);
	PK11_USE_THREADS(PZ_Lock((PZLock *)module->refLock);)
	if (module->slotCount-- == 1) {
	    willfree = PR_TRUE;
	}
	PORT_Assert(willfree || (module->slotCount > 0));
	PK11_USE_THREADS(PZ_Unlock((PZLock *)module->refLock);)
        if (!willfree) return;
    }

    if (module == pendingModule) {
	pendingModule = NULL;
    }

    if (module->loaded) {
	SECMOD_UnloadModule(module);
    }
    PK11_USE_THREADS(PZ_DestroyLock((PZLock *)module->refLock);)
    PORT_FreeArena(module->arena,PR_FALSE);
    secmod_PrivateModuleCount--;
}

/* destroy a list element
 * this destroys a single element, and returns the next element
 * on the chain. It makes it easy to implement for loops to delete
 * the chain. It also make deleting a single element easy */
SECMODModuleList *
SECMOD_DestroyModuleListElement(SECMODModuleList *element) 
{
    SECMODModuleList *next = element->next;

    if (element->module) {
	SECMOD_DestroyModule(element->module);
	element->module = NULL;
    }
    PORT_Free(element);
    return next;
}


/*
 * Destroy an entire module list
 */
void
SECMOD_DestroyModuleList(SECMODModuleList *list) 
{
    SECMODModuleList *lp;

    for ( lp = list; lp != NULL; lp = SECMOD_DestroyModuleListElement(lp)) ;
}

PRBool
SECMOD_CanDeleteInternalModule(void)
{
    return (PRBool) (pendingModule == NULL);
}

/*
 * check to see if the module has added new slots. PKCS 11 v2.20 allows for
 * modules to add new slots, but never remove them. Slots cannot be added 
 * between a call to C_GetSlotLlist(Flag, NULL, &count) and the subsequent
 * C_GetSlotList(flag, &data, &count) so that the array doesn't accidently
 * grow on the caller. It is permissible for the slots to increase between
 * successive calls with NULL to get the size.
 */
SECStatus
SECMOD_UpdateSlotList(SECMODModule *mod)
{
    CK_RV crv;
    CK_ULONG count;
    int i, oldCount;
    PRBool freeRef = PR_FALSE;
    void *mark;
    CK_ULONG *slotIDs = NULL;
    PK11SlotInfo **newSlots = NULL;
    PK11SlotInfo **oldSlots = NULL;

    /* C_GetSlotList is not a session function, make sure 
     * calls are serialized */
    PZ_Lock(mod->refLock);
    freeRef = PR_TRUE;
    /* see if the number of slots have changed */
    crv = PK11_GETTAB(mod)->C_GetSlotList(PR_FALSE, NULL, &count);
    if (crv != CKR_OK) {
	PORT_SetError(PK11_MapError(crv));
	goto loser;
    }
    /* nothing new, blow out early, we want this function to be quick
     * and cheap in the normal case  */
    if (count == mod->slotCount) {
 	PZ_Unlock(mod->refLock);
	return SECSuccess;
    }
    if (count < mod->slotCount) {
	/* shouldn't happen with a properly functioning PKCS #11 module */
	PORT_SetError( SEC_ERROR_INCOMPATIBLE_PKCS11 );
	goto loser;
    }

    /* get the new slot list */
    slotIDs = PORT_NewArray(CK_SLOT_ID, count);
    if (slotIDs == NULL) {
	goto loser;
    }

    crv = PK11_GETTAB(mod)->C_GetSlotList(PR_FALSE, slotIDs, &count);
    if (crv != CKR_OK) {
	PORT_SetError(PK11_MapError(crv));
	goto loser;
    }
    freeRef = PR_FALSE;
    PZ_Unlock(mod->refLock);
    mark = PORT_ArenaMark(mod->arena);
    if (mark == NULL) {
	goto loser;
    }
    newSlots = PORT_ArenaZNewArray(mod->arena,PK11SlotInfo *,count);

    /* walk down the new slot ID list returned from the module. We keep
     * the old slots which match a returned ID, and we initialize the new 
     * slots. */
    for (i=0; i < count; i++) {
	PK11SlotInfo *slot = SECMOD_FindSlotByID(mod,slotIDs[i]);

	if (!slot) {
	    /* we have a new slot create a new slot data structure */
	    slot = PK11_NewSlotInfo(mod);
	    if (!slot) {
		goto loser;
	    }
	    PK11_InitSlot(mod, slotIDs[i], slot);
	    STAN_InitTokenForSlotInfo(NULL, slot);
	}
	newSlots[i] = slot;
    }
    STAN_ResetTokenInterator(NULL);
    PORT_Free(slotIDs);
    slotIDs = NULL;
    PORT_ArenaUnmark(mod->arena, mark);

    /* until this point we're still using the old slot list. Now we update
     * module slot list. We update the slots (array) first then the count, 
     * since we've already guarrenteed that count has increased (just in case 
     * someone is looking at the slots field of  module without holding the 
     * moduleLock */
    SECMOD_GetWriteLock(moduleLock);
    oldCount =mod->slotCount;
    oldSlots = mod->slots;
    mod->slots = newSlots; /* typical arena 'leak'... old mod->slots is
			    * allocated out of the module arena and won't
			    * be freed until the module is freed */
    mod->slotCount = count;
    SECMOD_ReleaseWriteLock(moduleLock);
    /* free our old references before forgetting about oldSlot*/
    for (i=0; i < oldCount; i++) {
	PK11_FreeSlot(oldSlots[i]);
    }
    return SECSuccess;

loser:
    if (freeRef) {
	PZ_Unlock(mod->refLock);
    }
    if (slotIDs) {
	PORT_Free(slotIDs);
    }
    /* free all the slots we allocated. newSlots are part of the
     * mod arena. NOTE: the newSlots array contain both new and old
     * slots, but we kept a reference to the old slots when we built the new
     * array, so we need to free all the slots in newSlots array. */
    if (newSlots) {
	for (i=0; i < count; i++) {
	    if (newSlots[i] == NULL) {
		break; /* hit the last one */
	    }
	    PK11_FreeSlot(newSlots[i]);
	}
    }
    /* must come after freeing newSlots */
    if (mark) {
 	PORT_ArenaRelease(mod->arena, mark);
    }
    return SECFailure;
}

/*
 * this handles modules that do not support C_WaitForSlotEvent().
 * The internal flags are stored. Note that C_WaitForSlotEvent() does not
 * have a timeout, so we don't have one for handleWaitForSlotEvent() either.
 */
PK11SlotInfo *
secmod_HandleWaitForSlotEvent(SECMODModule *mod,  unsigned long flags,
						PRIntervalTime latency)
{
    PRBool removableSlotsFound = PR_FALSE;
    int i;
    int error = SEC_ERROR_NO_EVENT;

    PZ_Lock(mod->refLock);
    if (mod->evControlMask & SECMOD_END_WAIT) {
	mod->evControlMask &= ~SECMOD_END_WAIT;
	PZ_Unlock(mod->refLock);
	PORT_SetError(SEC_ERROR_NO_EVENT);
	return NULL;
    }
    mod->evControlMask |= SECMOD_WAIT_SIMULATED_EVENT;
    while (mod->evControlMask & SECMOD_WAIT_SIMULATED_EVENT) {
	PZ_Unlock(mod->refLock);
	/* now is a good time to see if new slots have been added */
	SECMOD_UpdateSlotList(mod);

	/* loop through all the slots on a module */
	SECMOD_GetReadLock(moduleLock);
	for (i=0; i < mod->slotCount; i++) {
	    PK11SlotInfo *slot = mod->slots[i];
	    uint16 series;
	    PRBool present;

	    /* perm modules do not change */
	    if (slot->isPerm) {
		continue;
	    }
	    removableSlotsFound = PR_TRUE;
	    /* simulate the PKCS #11 module flags. are the flags different
	     * from the last time we called? */
	    series = slot->series;
	    present = PK11_IsPresent(slot);
	    if ((slot->flagSeries != series) || (slot->flagState != present)) {
		slot->flagState = present;
		slot->flagSeries = series;
		SECMOD_ReleaseReadLock(moduleLock);
		PZ_Lock(mod->refLock);
		mod->evControlMask &= ~SECMOD_END_WAIT;
		PZ_Unlock(mod->refLock);
		return PK11_ReferenceSlot(slot);
	    }
	}
	SECMOD_ReleaseReadLock(moduleLock);
	/* if everything was perm modules, don't lock up forever */
	if (!removableSlotsFound) {
	    error =SEC_ERROR_NO_SLOT_SELECTED;
	    PZ_Lock(mod->refLock);
	    break;
	}
	if (flags & CKF_DONT_BLOCK) {
	    PZ_Lock(mod->refLock);
	    break;
	}
	PR_Sleep(latency);
 	PZ_Lock(mod->refLock);
    }
    mod->evControlMask &= ~SECMOD_END_WAIT;
    PZ_Unlock(mod->refLock);
    PORT_SetError(error);
    return NULL;
}

/*
 * this function waits for a token event on any slot of a given module
 * This function should not be called from more than one thread of the
 * same process (though other threads can make other library calls
 * on this module while this call is blocked).
 */
PK11SlotInfo *
SECMOD_WaitForAnyTokenEvent(SECMODModule *mod, unsigned long flags,
						 PRIntervalTime latency)
{
    CK_SLOT_ID id;
    CK_RV crv;
    PK11SlotInfo *slot;

    /* first the the PKCS #11 call */
    PZ_Lock(mod->refLock);
    if (mod->evControlMask & SECMOD_END_WAIT) {
	goto end_wait;
    }
    mod->evControlMask |= SECMOD_WAIT_PKCS11_EVENT;
    PZ_Unlock(mod->refLock);
    crv = PK11_GETTAB(mod)->C_WaitForSlotEvent(flags, &id, NULL);
    PZ_Lock(mod->refLock);
    mod->evControlMask &= ~SECMOD_WAIT_PKCS11_EVENT;
    /* if we are in end wait, short circuit now, don't even risk
     * going into secmod_HandleWaitForSlotEvent */
    if (mod->evControlMask & SECMOD_END_WAIT) {
	goto end_wait;
    }
    PZ_Unlock(mod->refLock);
    if (crv == CKR_FUNCTION_NOT_SUPPORTED) {
	/* module doesn't support that call, simulate it */
	return secmod_HandleWaitForSlotEvent(mod, flags, latency);
    }
    if (crv != CKR_OK) {
	/* we can get this error if finalize was called while we were
	 * still running. This is the only way to force a C_WaitForSlotEvent()
	 * to return in PKCS #11. In this case, just return that there
	 * was no event. */
	if (crv == CKR_CRYPTOKI_NOT_INITIALIZED) {
	    PORT_SetError(SEC_ERROR_NO_EVENT);
	} else {
	    PORT_SetError(PK11_MapError(crv));
	}
	return NULL;
    }
    slot = SECMOD_FindSlotByID(mod, id);
    if (slot == NULL) {
	/* possibly a new slot that was added? */
	SECMOD_UpdateSlotList(mod);
	slot = SECMOD_FindSlotByID(mod, id);
    }
    return slot;

    /* must be called with the lock on. */
end_wait:
    mod->evControlMask &= ~SECMOD_END_WAIT;
    PZ_Unlock(mod->refLock);
    PORT_SetError(SEC_ERROR_NO_EVENT);
    return NULL;
}

/*
 * This function "wakes up" WaitForAnyTokenEvent. It's a pretty drastic
 * function, possibly bringing down the pkcs #11 module in question. This
 * should be OK because 1) it does reinitialize, and 2) it should only be
 * called when we are on our way to tear the whole system down anyway.
 */
SECStatus
SECMOD_CancelWait(SECMODModule *mod)
{
    unsigned long controlMask = mod->evControlMask;
    SECStatus rv = SECSuccess;
    CK_RV crv;

    PZ_Lock(mod->refLock);
    mod->evControlMask |= SECMOD_END_WAIT;
    controlMask = mod->evControlMask;
    if (controlMask & SECMOD_WAIT_PKCS11_EVENT) {
	/* NOTE: this call will drop all transient keys, in progress
	 * operations, and any authentication. This is the only documented
	 * way to get WaitForSlotEvent to return. Also note: for non-thread
	 * safe tokens, we need to hold the module lock, this is not yet at
	 * system shutdown/starup time, so we need to protect these calls */
	crv = PK11_GETTAB(mod)->C_Finalize(NULL);
	/* ok, we slammed the module down, now we need to reinit it in case
	 * we intend to use it again */
	if (crv = CKR_OK) {
	    secmod_ModuleInit(mod);
	} else {
	    /* Finalized failed for some reason,  notify the application
	     * so maybe it has a prayer of recovering... */
	    PORT_SetError(PK11_MapError(crv));
	    rv = SECFailure;
	}
    } else if (controlMask & SECMOD_WAIT_SIMULATED_EVENT) {
	mod->evControlMask &= ~SECMOD_WAIT_SIMULATED_EVENT; 
				/* Simulated events will eventually timeout
				 * and wake up in the loop */
    }
    PZ_Unlock(mod->refLock);
    return rv;
}

/*
 * check to see if the module has removable slots that we may need to
 * watch for.
 */
PRBool
SECMOD_HasRemovableSlots(SECMODModule *mod)
{
    int i;
    PRBool ret = PR_FALSE;

    SECMOD_GetReadLock(moduleLock);
    for (i=0; i < mod->slotCount; i++) {
	PK11SlotInfo *slot = mod->slots[i];
	/* perm modules are not inserted or removed */
	if (slot->isPerm) {
	    continue;
	}
	ret = PR_TRUE;
	break;
    }
    SECMOD_ReleaseReadLock(moduleLock);
    return ret;
}