Adding upstream version 115.8.0esr.upstream/115.8.0esr

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 946 insertions, 0 deletions

diff --git a/security/nss/lib/util/utilmod.c b/security/nss/lib/util/utilmod.c
new file mode 100644
index 0000000000..3ed7b3dd61
--- /dev/null
+++ b/security/nss/lib/util/utilmod.c
@@ -0,0 +1,946 @@
+/* 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. For the rest of NSS, only one kind of database handle exists:
+ *
+ *     SFTKDBHandle
+ *
+ * There is one SFTKDBHandle for each key database and one for each cert
+ * database. These databases are opened as associated pairs, one pair per
+ * slot. SFTKDBHandles are reference counted objects.
+ *
+ * Each SFTKDBHandle points to a low level database handle (SDB). This handle
+ * represents the underlying physical database. These objects are not
+ * reference counted, and are 'owned' by their respective SFTKDBHandles.
+ */
+
+#include "prprf.h"
+#include "prsystem.h"
+#include "secport.h"
+#include "utilpars.h"
+#include "secerr.h"
+
+#if defined(_WIN32)
+#include <io.h>
+#include <windows.h>
+#endif
+#ifdef XP_UNIX
+#include <unistd.h>
+#endif
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+
+#if defined(_WIN32)
+#define os_fdopen _fdopen
+#define os_truncate_open_flags _O_CREAT | _O_RDWR | _O_TRUNC
+#define os_append_open_flags _O_CREAT | _O_RDWR | _O_APPEND
+#define os_open_permissions_type int
+#define os_open_permissions_default _S_IREAD | _S_IWRITE
+#define os_stat_type struct _stat
+
+/*
+ * Convert a UTF8 string to Unicode wide character
+ */
+LPWSTR
+_NSSUTIL_UTF8ToWide(const char *buf)
+{
+    DWORD size;
+    LPWSTR wide;
+
+    if (!buf) {
+        return NULL;
+    }
+
+    size = MultiByteToWideChar(CP_UTF8, 0, buf, -1, NULL, 0);
+    if (size == 0) {
+        return NULL;
+    }
+    wide = PORT_Alloc(sizeof(WCHAR) * size);
+    if (!wide) {
+        return NULL;
+    }
+    size = MultiByteToWideChar(CP_UTF8, 0, buf, -1, wide, size);
+    if (size == 0) {
+        PORT_Free(wide);
+        return NULL;
+    }
+    return wide;
+}
+
+static int
+os_open(const char *filename, int oflag, int pmode)
+{
+    int fd;
+
+    if (!filename) {
+        return -1;
+    }
+
+    wchar_t *filenameWide = _NSSUTIL_UTF8ToWide(filename);
+    if (!filenameWide) {
+        return -1;
+    }
+    fd = _wopen(filenameWide, oflag, pmode);
+    PORT_Free(filenameWide);
+
+    return fd;
+}
+
+static int
+os_stat(const char *path, os_stat_type *buffer)
+{
+    int result;
+
+    if (!path) {
+        return -1;
+    }
+
+    wchar_t *pathWide = _NSSUTIL_UTF8ToWide(path);
+    if (!pathWide) {
+        return -1;
+    }
+    result = _wstat(pathWide, buffer);
+    PORT_Free(pathWide);
+
+    return result;
+}
+
+static FILE *
+os_fopen(const char *filename, const char *mode)
+{
+    FILE *fp;
+
+    if (!filename || !mode) {
+        return NULL;
+    }
+
+    wchar_t *filenameWide = _NSSUTIL_UTF8ToWide(filename);
+    if (!filenameWide) {
+        return NULL;
+    }
+    wchar_t *modeWide = _NSSUTIL_UTF8ToWide(mode);
+    if (!modeWide) {
+        PORT_Free(filenameWide);
+        return NULL;
+    }
+    fp = _wfopen(filenameWide, modeWide);
+    PORT_Free(filenameWide);
+    PORT_Free(modeWide);
+
+    return fp;
+}
+
+PRStatus
+_NSSUTIL_Access(const char *path, PRAccessHow how)
+{
+    int result;
+
+    if (!path) {
+        return PR_FAILURE;
+    }
+
+    int mode;
+    switch (how) {
+        case PR_ACCESS_WRITE_OK:
+            mode = 2;
+            break;
+        case PR_ACCESS_READ_OK:
+            mode = 4;
+            break;
+        case PR_ACCESS_EXISTS:
+            mode = 0;
+            break;
+        default:
+            return PR_FAILURE;
+    }
+
+    wchar_t *pathWide = _NSSUTIL_UTF8ToWide(path);
+    if (!pathWide) {
+        return PR_FAILURE;
+    }
+    result = _waccess(pathWide, mode);
+    PORT_Free(pathWide);
+
+    return result < 0 ? PR_FAILURE : PR_SUCCESS;
+}
+
+static PRStatus
+nssutil_Delete(const char *name)
+{
+    BOOL result;
+
+    if (!name) {
+        return PR_FAILURE;
+    }
+
+    wchar_t *nameWide = _NSSUTIL_UTF8ToWide(name);
+    if (!nameWide) {
+        return PR_FAILURE;
+    }
+    result = DeleteFileW(nameWide);
+    PORT_Free(nameWide);
+
+    return result ? PR_SUCCESS : PR_FAILURE;
+}
+
+static PRStatus
+nssutil_Rename(const char *from, const char *to)
+{
+    BOOL result;
+
+    if (!from || !to) {
+        return PR_FAILURE;
+    }
+
+    wchar_t *fromWide = _NSSUTIL_UTF8ToWide(from);
+    if (!fromWide) {
+        return PR_FAILURE;
+    }
+    wchar_t *toWide = _NSSUTIL_UTF8ToWide(to);
+    if (!toWide) {
+        PORT_Free(fromWide);
+        return PR_FAILURE;
+    }
+    result = MoveFileW(fromWide, toWide);
+    PORT_Free(fromWide);
+    PORT_Free(toWide);
+
+    return result ? PR_SUCCESS : PR_FAILURE;
+}
+#else
+#define os_fopen fopen
+#define os_open open
+#define os_fdopen fdopen
+#define os_stat stat
+#define os_truncate_open_flags O_CREAT | O_RDWR | O_TRUNC
+#define os_append_open_flags O_CREAT | O_RDWR | O_APPEND
+#define os_open_permissions_type mode_t
+#define os_open_permissions_default 0600
+#define os_stat_type struct stat
+#define nssutil_Delete PR_Delete
+#define nssutil_Rename PR_Rename
+#endif
+
+/****************************************************************
+ *
+ * Secmod database.
+ *
+ * The new secmod database is simply a text file with each of the module
+ * entries in the following form:
+ *
+ * #
+ * # This is a comment The next line is the library to load
+ * library=libmypkcs11.so
+ * name="My PKCS#11 module"
+ * params="my library's param string"
+ * nss="NSS parameters"
+ * other="parameters for other libraries and applications"
+ *
+ * library=libmynextpk11.so
+ * name="My other PKCS#11 module"
+ */
+
+/*
+ * Smart string cat functions. Automatically manage the memory.
+ * The first parameter is the destination string. If it's null, we
+ * allocate memory for it. If it's not, we reallocate memory
+ * so the the concanenated string fits.
+ */
+static char *
+nssutil_DupnCat(char *baseString, const char *str, int str_len)
+{
+    int baseStringLen = baseString ? PORT_Strlen(baseString) : 0;
+    int len = baseStringLen + 1;
+    char *newString;
+
+    len += str_len;
+    newString = (char *)PORT_Realloc(baseString, len);
+    if (newString == NULL) {
+        PORT_Free(baseString);
+        return NULL;
+    }
+    PORT_Memcpy(&newString[baseStringLen], str, str_len);
+    newString[len - 1] = 0;
+    return newString;
+}
+
+/* Same as nssutil_DupnCat except it concatenates the full string, not a
+ * partial one */
+static char *
+nssutil_DupCat(char *baseString, const char *str)
+{
+    return nssutil_DupnCat(baseString, str, PORT_Strlen(str));
+}
+
+/* function to free up all the memory associated with a null terminated
+ * array of module specs */
+static SECStatus
+nssutil_releaseSpecList(char **moduleSpecList)
+{
+    if (moduleSpecList) {
+        char **index;
+        for (index = moduleSpecList; *index; index++) {
+            PORT_Free(*index);
+        }
+        PORT_Free(moduleSpecList);
+    }
+    return SECSuccess;
+}
+
+#define SECMOD_STEP 10
+static SECStatus
+nssutil_growList(char ***pModuleList, int *useCount, int last)
+{
+    char **newModuleList;
+
+    *useCount += SECMOD_STEP;
+    newModuleList = (char **)PORT_Realloc(*pModuleList,
+                                          *useCount * sizeof(char *));
+    if (newModuleList == NULL) {
+        return SECFailure;
+    }
+    PORT_Memset(&newModuleList[last], 0, sizeof(char *) * SECMOD_STEP);
+    *pModuleList = newModuleList;
+    return SECSuccess;
+}
+
+static char *
+_NSSUTIL_GetOldSecmodName(const char *dbname, const char *filename)
+{
+    char *file = NULL;
+    char *dirPath = PORT_Strdup(dbname);
+    char *sep;
+
+    sep = PORT_Strrchr(dirPath, *NSSUTIL_PATH_SEPARATOR);
+#ifdef _WIN32
+    if (!sep) {
+        /* utilparst.h defines NSSUTIL_PATH_SEPARATOR as "/" for all
+         * platforms. */
+        sep = PORT_Strrchr(dirPath, '\\');
+    }
+#endif
+    if (sep) {
+        *sep = 0;
+        file = PR_smprintf("%s" NSSUTIL_PATH_SEPARATOR "%s", dirPath, filename);
+    } else {
+        file = PR_smprintf("%s", filename);
+    }
+    PORT_Free(dirPath);
+    return file;
+}
+
+static SECStatus nssutil_AddSecmodDBEntry(const char *appName,
+                                          const char *filename,
+                                          const char *dbname,
+                                          const char *module, PRBool rw);
+
+enum lfopen_mode { lfopen_truncate,
+                   lfopen_append };
+
+FILE *
+lfopen(const char *name, enum lfopen_mode om, os_open_permissions_type open_perms)
+{
+    int fd;
+    FILE *file;
+
+    fd = os_open(name,
+                 (om == lfopen_truncate) ? os_truncate_open_flags : os_append_open_flags,
+                 open_perms);
+    if (fd < 0) {
+        return NULL;
+    }
+    file = os_fdopen(fd, (om == lfopen_truncate) ? "w+" : "a+");
+    if (!file) {
+        close(fd);
+    }
+    /* file inherits fd */
+    return file;
+}
+
+#define MAX_LINE_LENGTH 2048
+
+/*
+ * Read all the existing modules in out of the file.
+ */
+static char **
+nssutil_ReadSecmodDB(const char *appName,
+                     const char *filename, const char *dbname,
+                     char *params, PRBool rw)
+{
+    FILE *fd = NULL;
+    char **moduleList = NULL;
+    int moduleCount = 1;
+    int useCount = SECMOD_STEP;
+    char line[MAX_LINE_LENGTH];
+    PRBool internal = PR_FALSE;
+    PRBool skipParams = PR_FALSE;
+    char *moduleString = NULL;
+    char *paramsValue = NULL;
+    PRBool failed = PR_TRUE;
+
+    moduleList = (char **)PORT_ZAlloc(useCount * sizeof(char *));
+    if (moduleList == NULL)
+        return NULL;
+
+    if (dbname == NULL) {
+        goto return_default;
+    }
+
+    /* do we really want to use streams here */
+    fd = os_fopen(dbname, "r");
+    if (fd == NULL)
+        goto done;
+
+    /*
+     * the following loop takes line separated config lines and collapses
+     * the lines to a single string, escaping and quoting as necessary.
+     */
+    /* loop state variables */
+    moduleString = NULL;   /* current concatenated string */
+    internal = PR_FALSE;   /* is this an internal module */
+    skipParams = PR_FALSE; /* did we find an override parameter block*/
+    paramsValue = NULL;    /* the current parameter block value */
+    do {
+        int len;
+
+        if (fgets(line, sizeof(line), fd) == NULL) {
+            goto endloop;
+        }
+
+        /* remove the ending newline */
+        len = PORT_Strlen(line);
+        if (len >= 2 && line[len - 2] == '\r' && line[len - 1] == '\n') {
+            len = len - 2;
+            line[len] = 0;
+        } else if (len && (line[len - 1] == '\n' || line[len - 1] == '\r')) {
+            len--;
+            line[len] = 0;
+        }
+        if (*line == '#') {
+            continue;
+        }
+        if (*line != 0) {
+            /*
+             * The PKCS #11 group standard assumes blocks of strings
+             * separated by new lines, clumped by new lines. Internally
+             * we take strings separated by spaces, so we may need to escape
+             * certain spaces.
+             */
+            char *value = PORT_Strchr(line, '=');
+
+            /* there is no value, write out the stanza as is */
+            if (value == NULL || value[1] == 0) {
+                if (moduleString) {
+                    moduleString = nssutil_DupnCat(moduleString, " ", 1);
+                    if (moduleString == NULL)
+                        goto loser;
+                }
+                moduleString = nssutil_DupCat(moduleString, line);
+                if (moduleString == NULL)
+                    goto loser;
+                /* value is already quoted, just write it out */
+            } else if (value[1] == '"') {
+                if (moduleString) {
+                    moduleString = nssutil_DupnCat(moduleString, " ", 1);
+                    if (moduleString == NULL)
+                        goto loser;
+                }
+                moduleString = nssutil_DupCat(moduleString, line);
+                if (moduleString == NULL)
+                    goto loser;
+                /* we have an override parameter section, remember that
+                 * we found this (see following comment about why this
+                 * is necessary). */
+                if (PORT_Strncasecmp(line, "parameters", 10) == 0) {
+                    skipParams = PR_TRUE;
+                }
+                /*
+                 * The internal token always overrides it's parameter block
+                 * from the passed in parameters, so wait until then end
+                 * before we include the parameter block in case we need to
+                 * override it. NOTE: if the parameter block is quoted with ("),
+                 * this override does not happen. This allows you to override
+                 * the application's parameter configuration.
+                 *
+                 * parameter block state is controlled by the following variables:
+                 *  skipParams - Bool : set to true of we have an override param
+                 *    block (all other blocks, either implicit or explicit are
+                 *    ignored).
+                 *  paramsValue - char * : pointer to the current param block. In
+                 *    the absence of overrides, paramsValue is set to the first
+                 *    parameter block we find. All subsequent blocks are ignored.
+                 *    When we find an internal token, the application passed
+                 *    parameters take precident.
+                 */
+            } else if (PORT_Strncasecmp(line, "parameters", 10) == 0) {
+                /* already have parameters */
+                if (paramsValue) {
+                    continue;
+                }
+                paramsValue = NSSUTIL_Quote(&value[1], '"');
+                if (paramsValue == NULL)
+                    goto loser;
+                continue;
+            } else {
+                /* may need to quote */
+                char *newLine;
+                if (moduleString) {
+                    moduleString = nssutil_DupnCat(moduleString, " ", 1);
+                    if (moduleString == NULL)
+                        goto loser;
+                }
+                moduleString = nssutil_DupnCat(moduleString, line, value - line + 1);
+                if (moduleString == NULL)
+                    goto loser;
+                newLine = NSSUTIL_Quote(&value[1], '"');
+                if (newLine == NULL)
+                    goto loser;
+                moduleString = nssutil_DupCat(moduleString, newLine);
+                PORT_Free(newLine);
+                if (moduleString == NULL)
+                    goto loser;
+            }
+
+            /* check to see if it's internal? */
+            if (PORT_Strncasecmp(line, "NSS=", 4) == 0) {
+                /* This should be case insensitive! reviewers make
+                 * me fix it if it's not */
+                if (PORT_Strstr(line, "internal")) {
+                    internal = PR_TRUE;
+                    /* override the parameters */
+                    if (paramsValue) {
+                        PORT_Free(paramsValue);
+                    }
+                    paramsValue = NSSUTIL_Quote(params, '"');
+                }
+            }
+            continue;
+        }
+        if ((moduleString == NULL) || (*moduleString == 0)) {
+            continue;
+        }
+
+    endloop:
+        /*
+         * if we are here, we have found a complete stanza. Now write out
+         * any param section we may have found.
+         */
+        if (paramsValue) {
+            /* we had an override */
+            if (!skipParams) {
+                moduleString = nssutil_DupnCat(moduleString, " parameters=", 12);
+                if (moduleString == NULL)
+                    goto loser;
+                moduleString = nssutil_DupCat(moduleString, paramsValue);
+                if (moduleString == NULL)
+                    goto loser;
+            }
+            PORT_Free(paramsValue);
+            paramsValue = NULL;
+        }
+
+        if ((moduleCount + 1) >= useCount) {
+            SECStatus rv;
+            rv = nssutil_growList(&moduleList, &useCount, moduleCount + 1);
+            if (rv != SECSuccess) {
+                goto loser;
+            }
+        }
+
+        if (internal) {
+            moduleList[0] = moduleString;
+        } else {
+            moduleList[moduleCount] = moduleString;
+            moduleCount++;
+        }
+        moduleString = NULL;
+        internal = PR_FALSE;
+        skipParams = PR_FALSE;
+    } while (!feof(fd));
+
+    if (moduleString) {
+        PORT_Free(moduleString);
+        moduleString = NULL;
+    }
+done:
+    /* if we couldn't open a pkcs11 database, look for the old one */
+    if (fd == NULL) {
+        char *olddbname = _NSSUTIL_GetOldSecmodName(dbname, filename);
+        PRStatus status;
+
+        /* couldn't get the old name */
+        if (!olddbname) {
+            goto bail;
+        }
+
+        /* old one exists */
+        status = _NSSUTIL_Access(olddbname, PR_ACCESS_EXISTS);
+        if (status == PR_SUCCESS) {
+            PR_smprintf_free(olddbname);
+            PORT_ZFree(moduleList, useCount * sizeof(char *));
+            PORT_SetError(SEC_ERROR_LEGACY_DATABASE);
+            return NULL;
+        }
+
+    bail:
+        if (olddbname) {
+            PR_smprintf_free(olddbname);
+        }
+    }
+
+return_default:
+
+    if (!moduleList[0]) {
+        char *newParams;
+        moduleString = PORT_Strdup(NSSUTIL_DEFAULT_INTERNAL_INIT1);
+        newParams = NSSUTIL_Quote(params, '"');
+        if (newParams == NULL)
+            goto loser;
+        moduleString = nssutil_DupCat(moduleString, newParams);
+        PORT_Free(newParams);
+        if (moduleString == NULL)
+            goto loser;
+        moduleString = nssutil_DupCat(moduleString,
+                                      NSSUTIL_DEFAULT_INTERNAL_INIT2);
+        if (moduleString == NULL)
+            goto loser;
+        moduleString = nssutil_DupCat(moduleString,
+                                      NSSUTIL_DEFAULT_SFTKN_FLAGS);
+        if (moduleString == NULL)
+            goto loser;
+        moduleString = nssutil_DupCat(moduleString,
+                                      NSSUTIL_DEFAULT_INTERNAL_INIT3);
+        if (moduleString == NULL)
+            goto loser;
+        moduleList[0] = moduleString;
+        moduleString = NULL;
+    }
+    failed = PR_FALSE;
+
+loser:
+    /*
+     * cleanup
+     */
+    /* deal with trust cert db here */
+    if (moduleString) {
+        PORT_Free(moduleString);
+        moduleString = NULL;
+    }
+    if (paramsValue) {
+        PORT_Free(paramsValue);
+        paramsValue = NULL;
+    }
+    if (failed || (moduleList[0] == NULL)) {
+        /* This is wrong! FIXME */
+        nssutil_releaseSpecList(moduleList);
+        moduleList = NULL;
+        failed = PR_TRUE;
+    }
+    if (fd != NULL) {
+        fclose(fd);
+    } else if (!failed && rw) {
+        /* update our internal module */
+        nssutil_AddSecmodDBEntry(appName, filename, dbname, moduleList[0], rw);
+    }
+    return moduleList;
+}
+
+static SECStatus
+nssutil_ReleaseSecmodDBData(const char *appName,
+                            const char *filename, const char *dbname,
+                            char **moduleSpecList, PRBool rw)
+{
+    if (moduleSpecList) {
+        nssutil_releaseSpecList(moduleSpecList);
+    }
+    return SECSuccess;
+}
+
+/*
+ * Delete a module from the Data Base
+ */
+static SECStatus
+nssutil_DeleteSecmodDBEntry(const char *appName,
+                            const char *filename,
+                            const char *dbname,
+                            const char *args,
+                            PRBool rw)
+{
+    /* SHDB_FIXME implement */
+    os_stat_type stat_existing;
+    os_open_permissions_type file_mode;
+    FILE *fd = NULL;
+    FILE *fd2 = NULL;
+    char line[MAX_LINE_LENGTH];
+    char *dbname2 = NULL;
+    char *block = NULL;
+    char *name = NULL;
+    char *lib = NULL;
+    int name_len = 0, lib_len = 0;
+    PRBool skip = PR_FALSE;
+    PRBool found = PR_FALSE;
+
+    if (dbname == NULL) {
+        PORT_SetError(SEC_ERROR_INVALID_ARGS);
+        return SECFailure;
+    }
+
+    if (!rw) {
+        PORT_SetError(SEC_ERROR_READ_ONLY);
+        return SECFailure;
+    }
+
+    dbname2 = PORT_Strdup(dbname);
+    if (dbname2 == NULL)
+        goto loser;
+    dbname2[strlen(dbname) - 1]++;
+
+    /* get the permissions of the existing file, or use the default */
+    if (!os_stat(dbname, &stat_existing)) {
+        file_mode = stat_existing.st_mode;
+    } else {
+        file_mode = os_open_permissions_default;
+    }
+
+    /* do we really want to use streams here */
+    fd = os_fopen(dbname, "r");
+    if (fd == NULL)
+        goto loser;
+
+    fd2 = lfopen(dbname2, lfopen_truncate, file_mode);
+
+    if (fd2 == NULL)
+        goto loser;
+
+    name = NSSUTIL_ArgGetParamValue("name", args);
+    if (name) {
+        name_len = PORT_Strlen(name);
+    }
+    lib = NSSUTIL_ArgGetParamValue("library", args);
+    if (lib) {
+        lib_len = PORT_Strlen(lib);
+    }
+
+    /*
+     * the following loop takes line separated config files and collapses
+     * the lines to a single string, escaping and quoting as necessary.
+     */
+    /* loop state variables */
+    block = NULL;
+    skip = PR_FALSE;
+    while (fgets(line, sizeof(line), fd) != NULL) {
+        /* If we are processing a block (we haven't hit a blank line yet */
+        if (*line != '\n') {
+            /* skip means we are in the middle of a block we are deleting */
+            if (skip) {
+                continue;
+            }
+            /* if we haven't found the block yet, check to see if this block
+             * matches our requirements */
+            if (!found && ((name && (PORT_Strncasecmp(line, "name=", 5) == 0) &&
+                            (PORT_Strncmp(line + 5, name, name_len) == 0)) ||
+                           (lib && (PORT_Strncasecmp(line, "library=", 8) == 0) &&
+                            (PORT_Strncmp(line + 8, lib, lib_len) == 0)))) {
+
+                /* yup, we don't need to save any more data, */
+                PORT_Free(block);
+                block = NULL;
+                /* we don't need to collect more of this block */
+                skip = PR_TRUE;
+                /* we don't need to continue searching for the block */
+                found = PR_TRUE;
+                continue;
+            }
+            /* not our match, continue to collect data in this block */
+            block = nssutil_DupCat(block, line);
+            continue;
+        }
+        /* we've collected a block of data that wasn't the module we were
+         * looking for, write it out */
+        if (block) {
+            fwrite(block, PORT_Strlen(block), 1, fd2);
+            PORT_Free(block);
+            block = NULL;
+        }
+        /* If we didn't just delete the this block, keep the blank line */
+        if (!skip) {
+            fputs(line, fd2);
+        }
+        /* we are definately not in a deleted block anymore */
+        skip = PR_FALSE;
+    }
+    fclose(fd);
+    fclose(fd2);
+    if (found) {
+        /* rename dbname2 to dbname */
+        nssutil_Delete(dbname);
+        nssutil_Rename(dbname2, dbname);
+    } else {
+        nssutil_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) {
+        nssutil_Delete(dbname2);
+        PORT_Free(dbname2);
+    }
+    PORT_Free(lib);
+    PORT_Free(name);
+    return SECFailure;
+}
+
+/*
+ * Add a module to the Data base
+ */
+static SECStatus
+nssutil_AddSecmodDBEntry(const char *appName,
+                         const char *filename, const char *dbname,
+                         const char *module, PRBool rw)
+{
+    os_stat_type stat_existing;
+    os_open_permissions_type file_mode;
+    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_DeleteSecmodDBEntry(appName, filename, dbname, module, rw);
+
+    /* get the permissions of the existing file, or use the default */
+    if (!os_stat(dbname, &stat_existing)) {
+        file_mode = stat_existing.st_mode;
+    } else {
+        file_mode = os_open_permissions_default;
+    }
+
+    fd = lfopen(dbname, lfopen_append, file_mode);
+    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_AddSecmodDBEntry(appName, filename,
+                                              secmod, (char *)args, rw) == SECSuccess)
+                        ? &success
+                        : NULL;
+            break;
+        case SECMOD_MODULE_DB_FUNCTION_DEL:
+            rvstr = (nssutil_DeleteSecmodDBEntry(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;
+}