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686 lines
18 KiB
C
686 lines
18 KiB
C
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/*
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* The following code handles the storage of PKCS 11 modules used by the
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* NSS. For the rest of NSS, only one kind of database handle exists:
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*
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* SFTKDBHandle
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*
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* There is one SFTKDBHandle for each key database and one for each cert
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* database. These databases are opened as associated pairs, one pair per
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* slot. SFTKDBHandles are reference counted objects.
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*
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* Each SFTKDBHandle points to a low level database handle (SDB). This handle
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* represents the underlying physical database. These objects are not
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* reference counted, and are 'owned' by their respective SFTKDBHandles.
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*/
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#include "prprf.h"
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#include "prsystem.h"
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#include "secport.h"
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#include "utilpars.h"
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#include "secerr.h"
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#if defined (_WIN32)
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#include <io.h>
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#endif
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/****************************************************************
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*
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* Secmod database.
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*
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* The new secmod database is simply a text file with each of the module
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* entries in the following form:
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*
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* #
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* # This is a comment The next line is the library to load
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* library=libmypkcs11.so
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* name="My PKCS#11 module"
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* params="my library's param string"
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* nss="NSS parameters"
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* other="parameters for other libraries and applications"
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*
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* library=libmynextpk11.so
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* name="My other PKCS#11 module"
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*/
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/*
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* Smart string cat functions. Automatically manage the memory.
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* The first parameter is the source string. If it's null, we
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* allocate memory for it. If it's not, we reallocate memory
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* so the the concanenated string fits.
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*/
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static char *
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nssutil_DupnCat(char *baseString, const char *str, int str_len)
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{
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int len = (baseString ? PORT_Strlen(baseString) : 0) + 1;
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char *newString;
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len += str_len;
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newString = (char *) PORT_Realloc(baseString,len);
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if (newString == NULL) {
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PORT_Free(baseString);
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return NULL;
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}
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if (baseString == NULL) *newString = 0;
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return PORT_Strncat(newString,str, str_len);
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}
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/* Same as nssutil_DupnCat except it concatenates the full string, not a
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* partial one */
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static char *
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nssutil_DupCat(char *baseString, const char *str)
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{
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return nssutil_DupnCat(baseString, str, PORT_Strlen(str));
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}
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/* function to free up all the memory associated with a null terminated
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* array of module specs */
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static SECStatus
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nssutil_releaseSpecList(char **moduleSpecList)
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{
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if (moduleSpecList) {
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char **index;
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for(index = moduleSpecList; *index; index++) {
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PORT_Free(*index);
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}
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PORT_Free(moduleSpecList);
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}
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return SECSuccess;
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}
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#define SECMOD_STEP 10
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static SECStatus
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nssutil_growList(char ***pModuleList, int *useCount, int last)
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{
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char **newModuleList;
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*useCount += SECMOD_STEP;
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newModuleList = (char **)PORT_Realloc(*pModuleList,
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*useCount*sizeof(char *));
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if (newModuleList == NULL) {
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return SECFailure;
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}
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PORT_Memset(&newModuleList[last],0, sizeof(char *)*SECMOD_STEP);
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*pModuleList = newModuleList;
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return SECSuccess;
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}
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static
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char *_NSSUTIL_GetOldSecmodName(const char *dbname,const char *filename)
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{
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char *file = NULL;
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char *dirPath = PORT_Strdup(dbname);
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char *sep;
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sep = PORT_Strrchr(dirPath,*NSSUTIL_PATH_SEPARATOR);
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#ifdef _WIN32
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if (!sep) {
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/* utilparst.h defines NSSUTIL_PATH_SEPARATOR as "/" for all
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* platforms. */
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sep = PORT_Strrchr(dirPath,'\\');
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}
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#endif
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if (sep) {
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*sep = 0;
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file = PR_smprintf("%s"NSSUTIL_PATH_SEPARATOR"%s", dirPath, filename);
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} else {
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file = PR_smprintf("%s", filename);
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}
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PORT_Free(dirPath);
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return file;
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}
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static SECStatus nssutil_AddSecmodDB(const char *appName,
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const char *filename, const char *dbname,
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char *module, PRBool rw);
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#ifdef XP_UNIX
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#include <unistd.h>
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#endif
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#include <fcntl.h>
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/* same as fopen, except it doesn't use umask, but explicit */
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FILE *
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lfopen(const char *name, const char *mode, int flags)
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{
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int fd;
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FILE *file;
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fd = open(name, flags, 0600);
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if (fd < 0) {
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return NULL;
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}
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file = fdopen(fd, mode);
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if (!file) {
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close(fd);
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}
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/* file inherits fd */
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return file;
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}
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#define MAX_LINE_LENGTH 2048
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/*
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* Read all the existing modules in out of the file.
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*/
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static char **
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nssutil_ReadSecmodDB(const char *appName,
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const char *filename, const char *dbname,
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char *params, PRBool rw)
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{
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FILE *fd = NULL;
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char **moduleList = NULL;
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int moduleCount = 1;
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int useCount = SECMOD_STEP;
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char line[MAX_LINE_LENGTH];
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PRBool internal = PR_FALSE;
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PRBool skipParams = PR_FALSE;
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char *moduleString = NULL;
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char *paramsValue=NULL;
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PRBool failed = PR_TRUE;
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moduleList = (char **) PORT_ZAlloc(useCount*sizeof(char **));
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if (moduleList == NULL) return NULL;
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if (dbname == NULL) {
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goto return_default;
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}
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/* do we really want to use streams here */
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fd = fopen(dbname, "r");
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if (fd == NULL) goto done;
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/*
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* the following loop takes line separated config lines and collapses
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* the lines to a single string, escaping and quoting as necessary.
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*/
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/* loop state variables */
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moduleString = NULL; /* current concatenated string */
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internal = PR_FALSE; /* is this an internal module */
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skipParams = PR_FALSE; /* did we find an override parameter block*/
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paramsValue = NULL; /* the current parameter block value */
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while (fgets(line, sizeof(line), fd) != NULL) {
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int len = PORT_Strlen(line);
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/* remove the ending newline */
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if (len && line[len-1] == '\n') {
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len--;
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line[len] = 0;
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}
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if (*line == '#') {
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continue;
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}
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if (*line != 0) {
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/*
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* The PKCS #11 group standard assumes blocks of strings
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* separated by new lines, clumped by new lines. Internally
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* we take strings separated by spaces, so we may need to escape
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* certain spaces.
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*/
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char *value = PORT_Strchr(line,'=');
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/* there is no value, write out the stanza as is */
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if (value == NULL || value[1] == 0) {
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if (moduleString) {
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moduleString = nssutil_DupnCat(moduleString," ", 1);
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if (moduleString == NULL) goto loser;
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}
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moduleString = nssutil_DupCat(moduleString, line);
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if (moduleString == NULL) goto loser;
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/* value is already quoted, just write it out */
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} else if (value[1] == '"') {
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if (moduleString) {
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moduleString = nssutil_DupnCat(moduleString," ", 1);
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if (moduleString == NULL) goto loser;
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}
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moduleString = nssutil_DupCat(moduleString, line);
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if (moduleString == NULL) goto loser;
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/* we have an override parameter section, remember that
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* we found this (see following comment about why this
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* is necessary). */
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if (PORT_Strncasecmp(line, "parameters", 10) == 0) {
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skipParams = PR_TRUE;
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}
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/*
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* The internal token always overrides it's parameter block
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* from the passed in parameters, so wait until then end
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* before we include the parameter block in case we need to
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* override it. NOTE: if the parameter block is quoted with ("),
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* this override does not happen. This allows you to override
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* the application's parameter configuration.
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*
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* parameter block state is controlled by the following variables:
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* skipParams - Bool : set to true of we have an override param
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* block (all other blocks, either implicit or explicit are
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* ignored).
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* paramsValue - char * : pointer to the current param block. In
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* the absence of overrides, paramsValue is set to the first
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* parameter block we find. All subsequent blocks are ignored.
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* When we find an internal token, the application passed
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* parameters take precident.
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*/
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} else if (PORT_Strncasecmp(line, "parameters", 10) == 0) {
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/* already have parameters */
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if (paramsValue) {
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continue;
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}
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paramsValue = NSSUTIL_Quote(&value[1], '"');
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if (paramsValue == NULL) goto loser;
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continue;
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} else {
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/* may need to quote */
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char *newLine;
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if (moduleString) {
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moduleString = nssutil_DupnCat(moduleString," ", 1);
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if (moduleString == NULL) goto loser;
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}
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moduleString = nssutil_DupnCat(moduleString,line,value-line+1);
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if (moduleString == NULL) goto loser;
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newLine = NSSUTIL_Quote(&value[1],'"');
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if (newLine == NULL) goto loser;
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moduleString = nssutil_DupCat(moduleString,newLine);
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PORT_Free(newLine);
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if (moduleString == NULL) goto loser;
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}
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/* check to see if it's internal? */
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if (PORT_Strncasecmp(line, "NSS=", 4) == 0) {
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/* This should be case insensitive! reviewers make
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* me fix it if it's not */
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if (PORT_Strstr(line,"internal")) {
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internal = PR_TRUE;
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/* override the parameters */
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if (paramsValue) {
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PORT_Free(paramsValue);
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}
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paramsValue = NSSUTIL_Quote(params, '"');
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}
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}
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continue;
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}
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if ((moduleString == NULL) || (*moduleString == 0)) {
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continue;
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}
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/*
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* if we are here, we have found a complete stanza. Now write out
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* any param section we may have found.
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*/
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if (paramsValue) {
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/* we had an override */
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if (!skipParams) {
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moduleString = nssutil_DupnCat(moduleString," parameters=", 12);
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if (moduleString == NULL) goto loser;
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moduleString = nssutil_DupCat(moduleString, paramsValue);
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if (moduleString == NULL) goto loser;
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}
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PORT_Free(paramsValue);
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paramsValue = NULL;
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}
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if ((moduleCount+1) >= useCount) {
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SECStatus rv;
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rv = nssutil_growList(&moduleList, &useCount, moduleCount+1);
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if (rv != SECSuccess) {
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goto loser;
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}
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}
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if (internal) {
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moduleList[0] = moduleString;
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} else {
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moduleList[moduleCount] = moduleString;
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moduleCount++;
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}
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moduleString = NULL;
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internal = PR_FALSE;
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skipParams = PR_FALSE;
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}
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if (moduleString) {
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PORT_Free(moduleString);
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moduleString = NULL;
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}
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done:
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/* if we couldn't open a pkcs11 database, look for the old one */
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if (fd == NULL) {
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char *olddbname = _NSSUTIL_GetOldSecmodName(dbname,filename);
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PRStatus status;
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/* couldn't get the old name */
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if (!olddbname) {
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goto bail;
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}
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/* old one exists */
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status = PR_Access(olddbname, PR_ACCESS_EXISTS);
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if (status == PR_SUCCESS) {
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PR_smprintf_free(olddbname);
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PORT_ZFree(moduleList, useCount*sizeof(char **));
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PORT_SetError(SEC_ERROR_LEGACY_DATABASE);
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return NULL;
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}
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bail:
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if (olddbname) {
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PR_smprintf_free(olddbname);
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}
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}
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return_default:
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if (!moduleList[0]) {
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char * newParams;
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moduleString = PORT_Strdup(NSSUTIL_DEFAULT_INTERNAL_INIT1);
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newParams = NSSUTIL_Quote(params,'"');
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if (newParams == NULL) goto loser;
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moduleString = nssutil_DupCat(moduleString, newParams);
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PORT_Free(newParams);
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if (moduleString == NULL) goto loser;
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moduleString = nssutil_DupCat(moduleString,
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NSSUTIL_DEFAULT_INTERNAL_INIT2);
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if (moduleString == NULL) goto loser;
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moduleString = nssutil_DupCat(moduleString,
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NSSUTIL_DEFAULT_SFTKN_FLAGS);
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if (moduleString == NULL) goto loser;
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moduleString = nssutil_DupCat(moduleString,
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NSSUTIL_DEFAULT_INTERNAL_INIT3);
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if (moduleString == NULL) goto loser;
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moduleList[0] = moduleString;
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moduleString = NULL;
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}
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failed = PR_FALSE;
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loser:
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/*
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* cleanup
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*/
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/* deal with trust cert db here */
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if (moduleString) {
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PORT_Free(moduleString);
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moduleString = NULL;
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}
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if (paramsValue) {
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PORT_Free(paramsValue);
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paramsValue = NULL;
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}
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if (failed || (moduleList[0] == NULL)) {
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/* This is wrong! FIXME */
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nssutil_releaseSpecList(moduleList);
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moduleList = NULL;
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failed = PR_TRUE;
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}
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if (fd != NULL) {
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fclose(fd);
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} else if (!failed && rw) {
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/* update our internal module */
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nssutil_AddSecmodDB(appName,filename,dbname,moduleList[0],rw);
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}
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return moduleList;
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}
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static SECStatus
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nssutil_ReleaseSecmodDBData(const char *appName,
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const char *filename, const char *dbname,
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char **moduleSpecList, PRBool rw)
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{
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if (moduleSpecList) {
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nssutil_releaseSpecList(moduleSpecList);
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}
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return SECSuccess;
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}
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/*
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* Delete a module from the Data Base
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*/
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static SECStatus
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nssutil_DeleteSecmodDB(const char *appName,
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const char *filename, const char *dbname,
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char *args, PRBool rw)
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{
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/* SHDB_FIXME implement */
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FILE *fd = NULL;
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FILE *fd2 = NULL;
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char line[MAX_LINE_LENGTH];
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char *dbname2 = NULL;
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char *block = NULL;
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char *name = NULL;
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char *lib = NULL;
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int name_len, lib_len;
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PRBool skip = PR_FALSE;
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PRBool found = PR_FALSE;
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if (dbname == NULL) {
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PORT_SetError(SEC_ERROR_INVALID_ARGS);
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return SECFailure;
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}
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if (!rw) {
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PORT_SetError(SEC_ERROR_READ_ONLY);
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return SECFailure;
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}
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dbname2 = PORT_Strdup(dbname);
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if (dbname2 == NULL) goto loser;
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dbname2[strlen(dbname)-1]++;
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/* do we really want to use streams here */
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fd = fopen(dbname, "r");
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if (fd == NULL) goto loser;
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fd2 = lfopen(dbname2, "w+", O_CREAT|O_RDWR|O_TRUNC);
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if (fd2 == NULL) goto loser;
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name = NSSUTIL_ArgGetParamValue("name",args);
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if (name) {
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name_len = PORT_Strlen(name);
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}
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lib = NSSUTIL_ArgGetParamValue("library",args);
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if (lib) {
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lib_len = PORT_Strlen(lib);
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}
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|
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/*
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* the following loop takes line separated config files and collapses
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* the lines to a single string, escaping and quoting as necessary.
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*/
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/* loop state variables */
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block = NULL;
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skip = PR_FALSE;
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while (fgets(line, sizeof(line), fd) != NULL) {
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/* If we are processing a block (we haven't hit a blank line yet */
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if (*line != '\n') {
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/* skip means we are in the middle of a block we are deleting */
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if (skip) {
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continue;
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}
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/* if we haven't found the block yet, check to see if this block
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* matches our requirements */
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if (!found && ((name && (PORT_Strncasecmp(line,"name=",5) == 0) &&
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(PORT_Strncmp(line+5,name,name_len) == 0)) ||
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(lib && (PORT_Strncasecmp(line,"library=",8) == 0) &&
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(PORT_Strncmp(line+8,lib,lib_len) == 0)))) {
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/* yup, we don't need to save any more data, */
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PORT_Free(block);
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block=NULL;
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/* we don't need to collect more of this block */
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skip = PR_TRUE;
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/* we don't need to continue searching for the block */
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found =PR_TRUE;
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continue;
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}
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/* not our match, continue to collect data in this block */
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block = nssutil_DupCat(block,line);
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continue;
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}
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/* we've collected a block of data that wasn't the module we were
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* looking for, write it out */
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if (block) {
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fwrite(block, PORT_Strlen(block), 1, fd2);
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PORT_Free(block);
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block = NULL;
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}
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/* If we didn't just delete the this block, keep the blank line */
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if (!skip) {
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fputs(line,fd2);
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}
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/* we are definately not in a deleted block anymore */
|
|
skip = PR_FALSE;
|
|
}
|
|
fclose(fd);
|
|
fclose(fd2);
|
|
if (found) {
|
|
/* rename dbname2 to dbname */
|
|
PR_Delete(dbname);
|
|
PR_Rename(dbname2,dbname);
|
|
} else {
|
|
PR_Delete(dbname2);
|
|
}
|
|
PORT_Free(dbname2);
|
|
PORT_Free(lib);
|
|
PORT_Free(name);
|
|
PORT_Free(block);
|
|
return SECSuccess;
|
|
|
|
loser:
|
|
if (fd != NULL) {
|
|
fclose(fd);
|
|
}
|
|
if (fd2 != NULL) {
|
|
fclose(fd2);
|
|
}
|
|
if (dbname2) {
|
|
PR_Delete(dbname2);
|
|
PORT_Free(dbname2);
|
|
}
|
|
PORT_Free(lib);
|
|
PORT_Free(name);
|
|
return SECFailure;
|
|
}
|
|
|
|
/*
|
|
* Add a module to the Data base
|
|
*/
|
|
static SECStatus
|
|
nssutil_AddSecmodDB(const char *appName,
|
|
const char *filename, const char *dbname,
|
|
char *module, PRBool rw)
|
|
{
|
|
FILE *fd = NULL;
|
|
char *block = NULL;
|
|
PRBool libFound = PR_FALSE;
|
|
|
|
if (dbname == NULL) {
|
|
PORT_SetError(SEC_ERROR_INVALID_ARGS);
|
|
return SECFailure;
|
|
}
|
|
|
|
/* can't write to a read only module */
|
|
if (!rw) {
|
|
PORT_SetError(SEC_ERROR_READ_ONLY);
|
|
return SECFailure;
|
|
}
|
|
|
|
/* remove the previous version if it exists */
|
|
(void) nssutil_DeleteSecmodDB(appName, filename,
|
|
dbname, module, rw);
|
|
|
|
fd = lfopen(dbname, "a+", O_CREAT|O_RDWR|O_APPEND);
|
|
if (fd == NULL) {
|
|
return SECFailure;
|
|
}
|
|
module = NSSUTIL_ArgStrip(module);
|
|
while (*module) {
|
|
int count;
|
|
char *keyEnd = PORT_Strchr(module,'=');
|
|
char *value;
|
|
|
|
if (PORT_Strncmp(module, "library=", 8) == 0) {
|
|
libFound=PR_TRUE;
|
|
}
|
|
if (keyEnd == NULL) {
|
|
block = nssutil_DupCat(block, module);
|
|
break;
|
|
}
|
|
block = nssutil_DupnCat(block, module, keyEnd-module+1);
|
|
if (block == NULL) { goto loser; }
|
|
value = NSSUTIL_ArgFetchValue(&keyEnd[1], &count);
|
|
if (value) {
|
|
block = nssutil_DupCat(block, NSSUTIL_ArgStrip(value));
|
|
PORT_Free(value);
|
|
}
|
|
if (block == NULL) { goto loser; }
|
|
block = nssutil_DupnCat(block, "\n", 1);
|
|
module = keyEnd + 1 + count;
|
|
module = NSSUTIL_ArgStrip(module);
|
|
}
|
|
if (block) {
|
|
if (!libFound) {
|
|
fprintf(fd,"library=\n");
|
|
}
|
|
fwrite(block, PORT_Strlen(block), 1, fd);
|
|
fprintf(fd,"\n");
|
|
PORT_Free(block);
|
|
block = NULL;
|
|
}
|
|
fclose(fd);
|
|
return SECSuccess;
|
|
|
|
loser:
|
|
PORT_Free(block);
|
|
fclose(fd);
|
|
return SECFailure;
|
|
}
|
|
|
|
|
|
char **
|
|
NSSUTIL_DoModuleDBFunction(unsigned long function,char *parameters, void *args)
|
|
{
|
|
char *secmod = NULL;
|
|
char *appName = NULL;
|
|
char *filename = NULL;
|
|
NSSDBType dbType = NSS_DB_TYPE_NONE;
|
|
PRBool rw;
|
|
static char *success="Success";
|
|
char **rvstr = NULL;
|
|
|
|
|
|
secmod = _NSSUTIL_GetSecmodName(parameters, &dbType, &appName,
|
|
&filename, &rw);
|
|
if ((dbType == NSS_DB_TYPE_LEGACY) ||
|
|
(dbType == NSS_DB_TYPE_MULTIACCESS)) {
|
|
/* we can't handle the old database, only softoken can */
|
|
PORT_SetError(SEC_ERROR_LEGACY_DATABASE);
|
|
rvstr = NULL;
|
|
goto done;
|
|
}
|
|
|
|
switch (function) {
|
|
case SECMOD_MODULE_DB_FUNCTION_FIND:
|
|
rvstr = nssutil_ReadSecmodDB(appName,filename,
|
|
secmod,(char *)parameters,rw);
|
|
break;
|
|
case SECMOD_MODULE_DB_FUNCTION_ADD:
|
|
rvstr = (nssutil_AddSecmodDB(appName,filename,
|
|
secmod,(char *)args,rw) == SECSuccess) ? &success: NULL;
|
|
break;
|
|
case SECMOD_MODULE_DB_FUNCTION_DEL:
|
|
rvstr = (nssutil_DeleteSecmodDB(appName,filename,
|
|
secmod,(char *)args,rw) == SECSuccess) ? &success: NULL;
|
|
break;
|
|
case SECMOD_MODULE_DB_FUNCTION_RELEASE:
|
|
rvstr = (nssutil_ReleaseSecmodDBData(appName,filename,
|
|
secmod, (char **)args,rw) == SECSuccess) ? &success: NULL;
|
|
break;
|
|
}
|
|
done:
|
|
if (secmod) PR_smprintf_free(secmod);
|
|
if (appName) PORT_Free(appName);
|
|
if (filename) PORT_Free(filename);
|
|
return rvstr;
|
|
}
|