diff options
Diffstat (limited to 'security/nss/lib/softoken/lgglue.c')
| -rw-r--r-- | security/nss/lib/softoken/lgglue.c | 408 |
1 files changed, 408 insertions, 0 deletions
diff --git a/security/nss/lib/softoken/lgglue.c b/security/nss/lib/softoken/lgglue.c new file mode 100644 index 000000000..94f054129 --- /dev/null +++ b/security/nss/lib/softoken/lgglue.c @@ -0,0 +1,408 @@ +/* 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/. */ +/* + * The following code handles the storage of PKCS 11 modules used by the + * NSS. This file is written to abstract away how the modules are + * stored so we can deside that later. + */ +#include "sftkdb.h" +#include "sftkdbti.h" +#include "sdb.h" +#include "prsystem.h" +#include "prprf.h" +#include "prenv.h" +#include "lgglue.h" +#include "secerr.h" +#include "softoken.h" + +static LGOpenFunc legacy_glue_open = NULL; +static LGReadSecmodFunc legacy_glue_readSecmod = NULL; +static LGReleaseSecmodFunc legacy_glue_releaseSecmod = NULL; +static LGDeleteSecmodFunc legacy_glue_deleteSecmod = NULL; +static LGAddSecmodFunc legacy_glue_addSecmod = NULL; +static LGShutdownFunc legacy_glue_shutdown = NULL; + +/* + * The following 3 functions duplicate the work done by bl_LoadLibrary. + * We should make bl_LoadLibrary a global and replace the call to + * sftkdb_LoadLibrary(const char *libname) with it. + */ +#ifdef XP_UNIX +#include <unistd.h> +#define LG_MAX_LINKS 20 +static char * +sftkdb_resolvePath(const char *orig) +{ + int count = 0; + int len = 0; + int ret = -1; + char *resolved = NULL; + char *source = NULL; + + len = 1025; /* MAX PATH +1*/ + if (strlen(orig) + 1 > len) { + /* PATH TOO LONG */ + return NULL; + } + resolved = PORT_Alloc(len); + if (!resolved) { + return NULL; + } + source = PORT_Alloc(len); + if (!source) { + goto loser; + } + PORT_Strcpy(source, orig); + /* Walk down all the links */ + while (count++ < LG_MAX_LINKS) { + char *tmp; + /* swap our previous sorce out with resolved */ + /* read it */ + ret = readlink(source, resolved, len - 1); + if (ret < 0) { + break; + } + resolved[ret] = 0; + tmp = source; + source = resolved; + resolved = tmp; + } + if (count > 1) { + ret = 0; + } +loser: + if (resolved) { + PORT_Free(resolved); + } + if (ret < 0) { + if (source) { + PORT_Free(source); + source = NULL; + } + } + return source; +} + +#endif + +static PRLibrary * +sftkdb_LoadFromPath(const char *path, const char *libname) +{ + char *c; + int pathLen, nameLen, fullPathLen; + char *fullPathName = NULL; + PRLibSpec libSpec; + PRLibrary *lib = NULL; + + /* strip of our parent's library name */ + c = strrchr(path, PR_GetDirectorySeparator()); + if (!c) { + return NULL; /* invalid path */ + } + pathLen = (c - path) + 1; + nameLen = strlen(libname); + fullPathLen = pathLen + nameLen + 1; + fullPathName = (char *)PORT_Alloc(fullPathLen); + if (fullPathName == NULL) { + return NULL; /* memory allocation error */ + } + PORT_Memcpy(fullPathName, path, pathLen); + PORT_Memcpy(fullPathName + pathLen, libname, nameLen); + fullPathName[fullPathLen - 1] = 0; + + libSpec.type = PR_LibSpec_Pathname; + libSpec.value.pathname = fullPathName; + lib = PR_LoadLibraryWithFlags(libSpec, PR_LD_NOW | PR_LD_LOCAL); + PORT_Free(fullPathName); + return lib; +} + +static PRLibrary * +sftkdb_LoadLibrary(const char *libname) +{ + PRLibrary *lib = NULL; + PRFuncPtr fn_addr; + char *parentLibPath = NULL; + + fn_addr = (PRFuncPtr)&sftkdb_LoadLibrary; + parentLibPath = PR_GetLibraryFilePathname(SOFTOKEN_LIB_NAME, fn_addr); + + if (!parentLibPath) { + goto done; + } + + lib = sftkdb_LoadFromPath(parentLibPath, libname); +#ifdef XP_UNIX + /* handle symbolic link case */ + if (!lib) { + char *trueParentLibPath = sftkdb_resolvePath(parentLibPath); + if (!trueParentLibPath) { + goto done; + } + lib = sftkdb_LoadFromPath(trueParentLibPath, libname); + PORT_Free(trueParentLibPath); + } +#endif + +done: + if (parentLibPath) { + PORT_Free(parentLibPath); + } + + /* still couldn't load it, try the generic path */ + if (!lib) { + PRLibSpec libSpec; + libSpec.type = PR_LibSpec_Pathname; + libSpec.value.pathname = libname; + lib = PR_LoadLibraryWithFlags(libSpec, PR_LD_NOW | PR_LD_LOCAL); + } + + return lib; +} + +/* + * stub files for legacy db's to be able to encrypt and decrypt + * various keys and attributes. + */ +static SECStatus +sftkdb_encrypt_stub(PLArenaPool *arena, SDB *sdb, SECItem *plainText, + SECItem **cipherText) +{ + SFTKDBHandle *handle = sdb->app_private; + SECStatus rv; + + if (handle == NULL) { + return SECFailure; + } + + /* if we aren't the key handle, try the other handle */ + if (handle->type != SFTK_KEYDB_TYPE) { + handle = handle->peerDB; + } + + /* not a key handle */ + if (handle == NULL || handle->passwordLock == NULL) { + return SECFailure; + } + + PZ_Lock(handle->passwordLock); + if (handle->passwordKey.data == NULL) { + PZ_Unlock(handle->passwordLock); + /* PORT_SetError */ + return SECFailure; + } + + rv = sftkdb_EncryptAttribute(arena, + handle->newKey ? handle->newKey : &handle->passwordKey, + plainText, cipherText); + PZ_Unlock(handle->passwordLock); + + return rv; +} + +/* + * stub files for legacy db's to be able to encrypt and decrypt + * various keys and attributes. + */ +static SECStatus +sftkdb_decrypt_stub(SDB *sdb, SECItem *cipherText, SECItem **plainText) +{ + SFTKDBHandle *handle = sdb->app_private; + SECStatus rv; + SECItem *oldKey = NULL; + + if (handle == NULL) { + return SECFailure; + } + + /* if we aren't th handle, try the other handle */ + oldKey = handle->oldKey; + if (handle->type != SFTK_KEYDB_TYPE) { + handle = handle->peerDB; + } + + /* not a key handle */ + if (handle == NULL || handle->passwordLock == NULL) { + return SECFailure; + } + + PZ_Lock(handle->passwordLock); + if (handle->passwordKey.data == NULL) { + PZ_Unlock(handle->passwordLock); + /* PORT_SetError */ + return SECFailure; + } + rv = sftkdb_DecryptAttribute(oldKey ? oldKey : &handle->passwordKey, + cipherText, plainText); + PZ_Unlock(handle->passwordLock); + + return rv; +} + +static const char *LEGACY_LIB_NAME = + SHLIB_PREFIX "nssdbm" SHLIB_VERSION "." SHLIB_SUFFIX; +/* + * 2 bools to tell us if we've check the legacy library successfully or + * not. Initialize on startup to false by the C BSS segment; + */ +static PRLibrary *legacy_glue_lib = NULL; +static SECStatus +sftkdbLoad_Legacy() +{ + PRLibrary *lib = NULL; + LGSetCryptFunc setCryptFunction = NULL; + + if (legacy_glue_lib) { + return SECSuccess; + } + + lib = sftkdb_LoadLibrary(LEGACY_LIB_NAME); + if (lib == NULL) { + return SECFailure; + } + + legacy_glue_open = (LGOpenFunc)PR_FindFunctionSymbol(lib, "legacy_Open"); + legacy_glue_readSecmod = + (LGReadSecmodFunc)PR_FindFunctionSymbol(lib, "legacy_ReadSecmodDB"); + legacy_glue_releaseSecmod = + (LGReleaseSecmodFunc)PR_FindFunctionSymbol(lib, "legacy_ReleaseSecmodDBData"); + legacy_glue_deleteSecmod = + (LGDeleteSecmodFunc)PR_FindFunctionSymbol(lib, "legacy_DeleteSecmodDB"); + legacy_glue_addSecmod = + (LGAddSecmodFunc)PR_FindFunctionSymbol(lib, "legacy_AddSecmodDB"); + legacy_glue_shutdown = + (LGShutdownFunc)PR_FindFunctionSymbol(lib, "legacy_Shutdown"); + setCryptFunction = + (LGSetCryptFunc)PR_FindFunctionSymbol(lib, "legacy_SetCryptFunctions"); + + if (!legacy_glue_open || !legacy_glue_readSecmod || + !legacy_glue_releaseSecmod || !legacy_glue_deleteSecmod || + !legacy_glue_addSecmod || !setCryptFunction) { + PR_UnloadLibrary(lib); + return SECFailure; + } + + setCryptFunction(sftkdb_encrypt_stub, sftkdb_decrypt_stub); + legacy_glue_lib = lib; + return SECSuccess; +} + +CK_RV +sftkdbCall_open(const char *dir, const char *certPrefix, const char *keyPrefix, + int certVersion, int keyVersion, int flags, + SDB **certDB, SDB **keyDB) +{ + SECStatus rv; + + rv = sftkdbLoad_Legacy(); + if (rv != SECSuccess) { + return CKR_GENERAL_ERROR; + } + if (!legacy_glue_open) { + PORT_SetError(SEC_ERROR_LIBRARY_FAILURE); + return SECFailure; + } + return (*legacy_glue_open)(dir, certPrefix, keyPrefix, + certVersion, keyVersion, + flags, certDB, keyDB); +} + +char ** +sftkdbCall_ReadSecmodDB(const char *appName, const char *filename, + const char *dbname, char *params, PRBool rw) +{ + SECStatus rv; + + rv = sftkdbLoad_Legacy(); + if (rv != SECSuccess) { + return NULL; + } + if (!legacy_glue_readSecmod) { + PORT_SetError(SEC_ERROR_LIBRARY_FAILURE); + return NULL; + } + return (*legacy_glue_readSecmod)(appName, filename, dbname, params, rw); +} + +SECStatus +sftkdbCall_ReleaseSecmodDBData(const char *appName, + const char *filename, const char *dbname, + char **moduleSpecList, PRBool rw) +{ + SECStatus rv; + + rv = sftkdbLoad_Legacy(); + if (rv != SECSuccess) { + return rv; + } + if (!legacy_glue_releaseSecmod) { + PORT_SetError(SEC_ERROR_LIBRARY_FAILURE); + return SECFailure; + } + return (*legacy_glue_releaseSecmod)(appName, filename, dbname, + moduleSpecList, rw); +} + +SECStatus +sftkdbCall_DeleteSecmodDB(const char *appName, + const char *filename, const char *dbname, + char *args, PRBool rw) +{ + SECStatus rv; + + rv = sftkdbLoad_Legacy(); + if (rv != SECSuccess) { + return rv; + } + if (!legacy_glue_deleteSecmod) { + PORT_SetError(SEC_ERROR_LIBRARY_FAILURE); + return SECFailure; + } + return (*legacy_glue_deleteSecmod)(appName, filename, dbname, args, rw); +} + +SECStatus +sftkdbCall_AddSecmodDB(const char *appName, + const char *filename, const char *dbname, + char *module, PRBool rw) +{ + SECStatus rv; + + rv = sftkdbLoad_Legacy(); + if (rv != SECSuccess) { + return rv; + } + if (!legacy_glue_addSecmod) { + PORT_SetError(SEC_ERROR_LIBRARY_FAILURE); + return SECFailure; + } + return (*legacy_glue_addSecmod)(appName, filename, dbname, module, rw); +} + +CK_RV +sftkdbCall_Shutdown(void) +{ + CK_RV crv = CKR_OK; + char *disableUnload = NULL; + if (!legacy_glue_lib) { + return CKR_OK; + } + if (legacy_glue_shutdown) { +#ifdef NO_FORK_CHECK + PRBool parentForkedAfterC_Initialize = PR_FALSE; +#endif + crv = (*legacy_glue_shutdown)(parentForkedAfterC_Initialize); + } + disableUnload = PR_GetEnvSecure("NSS_DISABLE_UNLOAD"); + if (!disableUnload) { + PR_UnloadLibrary(legacy_glue_lib); + } + legacy_glue_lib = NULL; + legacy_glue_open = NULL; + legacy_glue_readSecmod = NULL; + legacy_glue_releaseSecmod = NULL; + legacy_glue_deleteSecmod = NULL; + legacy_glue_addSecmod = NULL; + return crv; +} |