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/*
* OpenVPN -- An application to securely tunnel IP networks
* over a single TCP/UDP port, with support for SSL/TLS-based
* session authentication and key exchange,
* packet encryption, packet authentication, and
* packet compression.
*
* Copyright (C) 2002-2021 OpenVPN Inc <sales@openvpn.net>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef _PLUGIN_AUTH_PAM_UTILS__H
#define _PLUGIN_AUTH_PAM_UTILS__H
/**
* Read 'tosearch', replace all occurrences of 'searchfor' with 'replacewith' and return
* a pointer to the NEW string. Does not modify the input strings. Will not enter an
* infinite loop with clever 'searchfor' and 'replacewith' strings.
*
* @author Daniel Johnson - Progman2000@usa.net / djohnson@progman.us
*
* @param tosearch haystack to search in
* @param searchfor needle to search for in the haystack
* @param replacewith when a match is found, replace needle with this string
*
* @return Returns NULL when any parameter is NULL or the worst-case result is to large ( >= SIZE_MAX).
* Otherwise it returns a pointer to a new buffer containing the modified input
*/
char *
searchandreplace(const char *tosearch, const char *searchfor, const char *replacewith);
/**
* Given an environmental variable name, search
* the envp array for its value
*
* @param name Environment variable to look up
* @param envp Environment variable table with all key/value pairs
*
* @return Returns a pointer to the value of the environment variable if found, otherwise NULL is returned.
*/
const char *
get_env(const char *name, const char *envp[]);
/**
* Return the length of a string array
*
* @param array Pointer to the array to calculate size of
*
*/
int
string_array_len(const char *array[]);
#endif
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