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/* Copyright (C) 1999 Beau Kuiper
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 2, 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, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
#include "ftpd.h"
#include "auth.h"
#define GOT_USER 1
#define NOT_GOT_USER 0
/* This file contains code to autheticate against custom password files */
typedef struct
{
char *udata;
char *password;
char *username;
char *homedir;
char *rootdir;
} PASSWDSTRUCT;
int internalauth_config(char *username, char *data, int line, void *h)
{
PASSWDSTRUCT *handle = (PASSWDSTRUCT *)h;
if (strcmp(username, handle->username) == 0)
{
handle->udata = strdupwrapper(data);
return(GOT_USER);
}
return(NOT_GOT_USER);
}
void *internalauth_gethandle(FTPSTATE *peer, TOKENSET *tset, char *username, int *err)
{
PASSWDSTRUCT *newhandle;
int result, error, line;
char *passwdfile = NULL;
/* assume we don't find the user */
*err = AUTH_USERNKNOW;
newhandle = mallocwrapper(sizeof(PASSWDSTRUCT));
newhandle->username = strdupwrapper(username);
passwdfile = mktokconfstr(tset, auth_getcursectionid(peer), "internal_passfile", NULL);
if (passwdfile == NULL)
goto logerror;
/* make sure that the password file is secure */
result = loadconfigfile(passwdfile, internalauth_config, newhandle, TRUE, &error, &line);
switch (result)
{
case CONFIG_OK:
goto error;
case CONFIG_HANDLER_ERROR:
break; /* found the user */
default:
goto logerror;
}
if (strchrcount(newhandle->udata, ':') != 2)
{
freewrapper(newhandle->udata);
goto error;
}
newhandle->password = newhandle->udata;
newhandle->homedir = strchr(newhandle->udata, ':') + 1;
/* lets hope this doesn't cause heart attacks. It may not
work with flakey C compilers */
newhandle->homedir[-1] = 0;
newhandle->rootdir = strchr(newhandle->homedir, ':') + 1;
newhandle->rootdir[-1] = 0;
*err = AUTH_OK;
freewrapper(passwdfile);
return(newhandle);
logerror:
if (passwdfile == NULL)
log_addentry(MYLOG_INFO, NULL, "You didn't specify a password file for internal authentication!");
else
log_giveentry(MYLOG_INFO, NULL, safe_snprintf("Error loading '%s': %s", passwdfile, config_errorstr(result)));
*err = AUTH_ERROR;
error:
freeifnotnull(passwdfile);
freewrapper(newhandle->username);
freewrapper(newhandle);
return(NULL);
}
void internalauth_freehandle(void *h)
{
PASSWDSTRUCT *handle = (PASSWDSTRUCT *)h;
freewrapper(handle->udata);
freewrapper(handle->username);
freewrapper(handle);
}
int internalauth_checkpasswd(void *h, char *password, char **errmsg)
{
PASSWDSTRUCT *handle = (PASSWDSTRUCT *)h;
return(chkpassword(handle->password, password));
}
char *internalauth_gethomedir(void *h)
{
return(((PASSWDSTRUCT *)h)->homedir);
}
char *internalauth_getrootdir(void *h)
{
return(((PASSWDSTRUCT *)h)->rootdir);
}
PERMSTRUCT internalauth_commands =
{
internalauth_checkpasswd,
internalauth_gethomedir,
internalauth_getrootdir,
NULL,
NULL,
NULL,
internalauth_gethandle,
internalauth_freehandle,
NULL,
};
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