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/**
* Feathery FTP-Server <https://sourceforge.net/projects/feathery>
* Copyright (C) 2005-2010 Andreas Martin (andreas.martin@linuxmail.org)
*
* ftpAccount.c - User account handling
*
* User account management is based on username, password and
* access-rights. An account can be created with the function
* ftpCreateAccount.
*
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* 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, see <http://www.gnu.org/licenses/>.
*/
#include <string.h>
#include "ftpTypes.h"
#include "ftpConfig.h"
#include "ftp.h"
/**
* @brief User account data
*/
typedef struct
{
char name[MAXLEN_USERNAME+1]; ///< user name
char passw[MAXLEN_PASSWORD+1]; ///< password of the account
char ftpRoot[MAX_PATH_LEN+1]; ///< root path of the user account on the server
int ftpRootLen; ///< length of ftpRoot
int accRights; ///< access rights of a account
}ftpUserAccount_S;
/**
* @brief Array which holds all registered user accounts
*/
LOCAL ftpUserAccount_S ftpUsers[MAX_USERS];
int ftpDeleteAccount(const char* name)
{
int n;
n = ftpFindAccount(name); // check if account already exists
if(n > 0)
{
ftpUsers[n - 1].name[0] = '\0'; // delete account
return 0;
}
return -1;
}
/**
* @brief Creates a new user account
*
* The translated path depends on the current working directory of the
* session and the root path of the session. In addition the path will
* be normalized.
* normalize root and check if normalized path really exists
*
* @param name user name
* @param passw account password
* @param root root directory of the account
* @param acc access rights, can be any combination of the following flags:
* - FTP_ACC_RD read access
* - FTP_ACC_WR write access
* - FTP_ACC_LS access to directory listing
* - FTP_ACC_DIR changing of working dir allowed
*
* @return 0 on success; -1 if MAX_USERS is reached
*/
int ftpCreateAccount(const char* name, const char* passw, const char* root, int acc)
{
int n;
n = ftpFindAccount(name); // check if account already exists
if(n > 0)
{
ftpUsers[n - 1].name[0] = '\0'; // delete account
}
for(n = 0; n < MAX_USERS; n++)
{
if(ftpUsers[n].name[0] == '\0')
{
strncpy(ftpUsers[n].name, name, MAXLEN_USERNAME);
strncpy(ftpUsers[n].passw, passw, MAXLEN_PASSWORD);
strncpy(ftpUsers[n].ftpRoot, root, MAX_PATH_LEN);
ftpUsers[n].ftpRootLen = (int)strlen(root);
ftpUsers[n].accRights = acc;
return 0;
}
}
return -1;
}
/**
* @brief Return the account id for a user name
*
* The function searches ftpUsers for the passed user name.
* The returned account id is the index + 1 in ftpUsers.
*
* @param name user name
*
* @return 0 if user is not found; 1 to MAX_USERS+1 if user is found
*/
int ftpFindAccount(const char* name)
{
if(name[0] != '\0') {
int n;
for(n = 0; n < MAX_USERS; n++) {
if(!strncmp(ftpUsers[n].name, name, MAXLEN_USERNAME)) {
return n + 1;
}
}
}
return 0;
}
const char * ftpFindAccountById(int userid)
{
if(userid == 0) {
return 0;
}
else if(ftpUsers[userid - 1].name[0] == '\0') {
return 0;
}
return ftpUsers[userid - 1].name;
}
/**
* @brief Checks the password of a user account
*
* Compares the passed password to the saved password in ftpUsers
*
* @param userId user account id
* @param passw password
*
* @return - 0: password is correct
* - -1: invalid user account id
* - else: incorrect password
*/
int ftpCheckPassword(int userId, const char* passw)
{
if(userId == 0) {
return -1;
}
else if(ftpUsers[userId - 1].passw[0] == '\0') {
return 0;
}
else {
return strncmp(ftpUsers[userId - 1].passw, passw, MAXLEN_PASSWORD);
}
}
/**
* @brief Checks if the account has the needed rights
*
* Compares the passed access rights to the saved rights in ftpUsers
*
* @param userId user account id
* @param accRights needed access rights
*
* @return - 0: the needed access rights are fulfilled
* - -1: invalid user account id
*/
int ftpCheckAccRights(int userId, int accRights)
{
if(!userId)
return -1;
if((ftpUsers[userId - 1].accRights & accRights) == accRights)
return 0;
return -1;
}
/**
* @brief Returns the root directory of a account
*
* @param userId user account id
* @param len length of the returned path
*
* @return root directory name or NULL if the user account id is invalid
*/
const char* ftpGetRoot(int userId, int* len)
{
if(!userId)
return NULL;
if(len)
*len = ftpUsers[userId - 1].ftpRootLen;
return ftpUsers[userId - 1].ftpRoot;
}
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