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/*
passwd.c - NSS lookup functions for passwd database
Copyright (C) 2006 West Consulting
Copyright (C) 2006, 2007, 2008, 2010 Arthur de Jong
Copyright (C) 2010 Symas Corporation
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301 USA
*/
#include "config.h"
#include <string.h>
#include <errno.h>
#include "prototypes.h"
#include "common.h"
#include "compat/attrs.h"
static nss_status_t read_passwd(
TFILE *fp,struct passwd *result,
char *buffer,size_t buflen,int *errnop)
{
int32_t tmpint32;
size_t bufptr=0;
READ_BUF_STRING(fp,result->pw_name);
READ_BUF_STRING(fp,result->pw_passwd);
READ_TYPE(fp,result->pw_uid,uid_t);
READ_TYPE(fp,result->pw_gid,gid_t);
READ_BUF_STRING(fp,result->pw_gecos);
READ_BUF_STRING(fp,result->pw_dir);
READ_BUF_STRING(fp,result->pw_shell);
return NSS_STATUS_SUCCESS;
}
#ifdef HAVE_NSSWITCH_H
nss_status_t _nss_nslcd_getpwnam_r(
#else /* not HAVE_NSSWITCH_H */
nss_status_t _nss_ldap_getpwnam_r(
#endif /* HAVE_NSSWITCH_H */
const char *name,struct passwd *result,char *buffer,size_t buflen,
int *errnop)
{
NSS_BYNAME(NSLCD_ACTION_PASSWD_BYNAME,
name,
read_passwd(fp,result,buffer,buflen,errnop));
}
#ifdef HAVE_NSSWITCH_H
nss_status_t _nss_nslcd_getpwuid_r(
#else /* not HAVE_NSSWITCH_H */
nss_status_t _nss_ldap_getpwuid_r(
#endif /* HAVE_NSSWITCH_H */
uid_t uid,struct passwd *result,char *buffer,
size_t buflen,int *errnop)
{
NSS_BYTYPE(NSLCD_ACTION_PASSWD_BYUID,
uid,uid_t,
read_passwd(fp,result,buffer,buflen,errnop));
}
/* thread-local file pointer to an ongoing request */
static __thread TFILE *pwentfp;
/* open a connection to the nslcd and write the request */
#ifdef HAVE_NSSWITCH_H
nss_status_t _nss_ldap_setpwent(nss_backend_t *be,void *args)
#else /* not HAVE_NSSWITCH_H */
nss_status_t _nss_ldap_setpwent(int UNUSED(stayopen))
#endif /* HAVE_NSSWITCH_H */
{
NSS_SETENT(pwentfp);
}
/* read password data from an opened stream */
#ifdef HAVE_NSSWITCH_H
nss_status_t _nss_nslcd_getpwent_r(
#else /* not HAVE_NSSWITCH_H */
nss_status_t _nss_ldap_getpwent_r(
#endif /* HAVE_NSSWITCH_H */
struct passwd *result,char *buffer,size_t buflen,int *errnop)
{
NSS_GETENT(pwentfp,NSLCD_ACTION_PASSWD_ALL,
read_passwd(pwentfp,result,buffer,buflen,errnop));
}
/* close the stream opened with setpwent() above */
#ifdef HAVE_NSSWITCH_H
nss_status_t _nss_ldap_endpwent(nss_backend_t *be,void *args)
#else /* not HAVE_NSSWITCH_H */
nss_status_t _nss_ldap_endpwent(void)
#endif /* HAVE_NSSWITCH_H */
{
NSS_ENDENT(pwentfp);
}
#ifdef HAVE_NSSWITCH_H
static nss_status_t _nss_ldap_getpwnam_r(nss_backend_t *be,void *args)
{
struct passwd priv_pw;
struct passwd *pw=NSS_ARGS(args)->buf.result?(struct passwd *)NSS_ARGS(args)->buf.result:&priv_pw;
char *buffer=NSS_ARGS(args)->buf.buffer;
size_t buflen=NSS_ARGS(args)->buf.buflen;
char *name=(char *)NSS_ARGS(args)->key.name;
char *data_ptr;
nss_status_t status;
if (NSS_ARGS(args)->buf.buflen < 0)
{
NSS_ARGS(args)->erange=1;
status=NSS_STATUS_TRYAGAIN;
return status;
}
status=_nss_nslcd_getpwnam_r(name,pw,buffer,buflen,&errno);
if (status!=NSS_STATUS_SUCCESS)
return status;
if (!NSS_ARGS(args)->buf.result)
{
/* result==NULL, return file format */
data_ptr=(char *)malloc(buflen);
sprintf(data_ptr,"%s:%s:%d:%d:%s:%s:%s",
pw->pw_name,"x",(int) pw->pw_uid,(int) pw->pw_gid,pw->pw_gecos,
pw->pw_dir,pw->pw_shell);
/* copy file-format data to buffer provided by front-end */
strcpy(buffer,data_ptr);
if (data_ptr)
free(data_ptr);
NSS_ARGS(args)->returnval=NSS_ARGS(args)->buf.buffer;
NSS_ARGS(args)->returnlen=strlen(NSS_ARGS(args)->buf.buffer);
}
else
{
NSS_ARGS(args)->returnval=NSS_ARGS(args)->buf.result;
}
return status;
}
static nss_status_t _nss_ldap_getpwuid_r(nss_backend_t *be,void *args)
{
struct passwd priv_pw;
struct passwd *pw=NSS_ARGS(args)->buf.result ?
NSS_ARGS(args)->buf.result : &priv_pw;
uid_t uid=NSS_ARGS(args)->key.uid;
char *data_ptr;
char *buffer=NSS_ARGS(args)->buf.buffer;
size_t buflen=NSS_ARGS(args)->buf.buflen;
nss_status_t status;
status=_nss_nslcd_getpwuid_r(uid,pw,buffer,buflen,&errno);
if (status!=NSS_STATUS_SUCCESS)
return status;
if (!NSS_ARGS(args)->buf.result)
{
/* result==NULL, return file format */
data_ptr=(char *)malloc((size_t) buflen);
sprintf(data_ptr,"%s:%s:%d:%d:%s:%s:%s",
pw->pw_name,"x",(int) pw->pw_uid,(int) pw->pw_gid,pw->pw_gecos,
pw->pw_dir,pw->pw_shell);
/* copy file-format data to buffer provided by front-end */
strcpy(buffer,data_ptr);
if (data_ptr)
free((void *)data_ptr);
NSS_ARGS(args)->returnval=NSS_ARGS(args)->buf.buffer;
NSS_ARGS(args)->returnlen=strlen(NSS_ARGS(args)->buf.buffer);
}
else
{
NSS_ARGS(args)->returnval=NSS_ARGS(args)->buf.result;
}
return status;
}
static nss_status_t _nss_ldap_getpwent_r(nss_backend_t *be,void *args)
{
struct passwd priv_pw;
struct passwd *pw=NSS_ARGS(args)->buf.result?(struct passwd *)NSS_ARGS(args)->buf.result:&priv_pw;
char *buffer=NSS_ARGS(args)->buf.buffer;
size_t buflen=NSS_ARGS(args)->buf.buflen;
char *data_ptr;
nss_status_t status;
status=_nss_nslcd_getpwent_r(pw,buffer,buflen,&errno);
if (status!=NSS_STATUS_SUCCESS)
return status;
if (!NSS_ARGS(args)->buf.result)
{
/* result==NULL, return file format */
data_ptr=(char *)malloc(buflen);
sprintf(data_ptr,"%s:%s:%d:%d:%s:%s:%s",
pw->pw_name,"x",(int) pw->pw_uid,(int) pw->pw_gid,pw->pw_gecos,
pw->pw_dir,pw->pw_shell);
/* copy file-format data to buffer provided by front-end */
strcpy(buffer,data_ptr);
if (data_ptr)
free(data_ptr);
NSS_ARGS(args)->returnval=NSS_ARGS(args)->buf.buffer;
NSS_ARGS(args)->returnlen=strlen(NSS_ARGS(args)->buf.buffer);
}
else
{
NSS_ARGS(args)->returnval=NSS_ARGS(args)->buf.result;
}
return status;
}
static nss_status_t _nss_ldap_passwd_destr(nss_backend_t *pw_context,void *args)
{
return _nss_ldap_default_destr(pw_context,args);
}
static nss_backend_op_t passwd_ops[]={
_nss_ldap_passwd_destr,
_nss_ldap_endpwent, /* NSS_DBOP_ENDENT */
_nss_ldap_setpwent, /* NSS_DBOP_SETENT */
_nss_ldap_getpwent_r, /* NSS_DBOP_GETENT */
_nss_ldap_getpwnam_r, /* NSS_DBOP_PASSWD_BYNAME */
_nss_ldap_getpwuid_r /* NSS_DBOP_PASSWD_BYUID */
};
nss_backend_t *_nss_ldap_passwd_constr(const char *db_name,
const char *src_name,const char *cfg_args)
{
nss_ldap_backend_t *be;
if (!(be=(nss_ldap_backend_t *)malloc(sizeof(*be))))
return NULL;
be->ops=passwd_ops;
be->n_ops=sizeof(passwd_ops)/sizeof(nss_backend_op_t);
if (_nss_ldap_default_constr(be)!=NSS_STATUS_SUCCESS)
return NULL;
return (nss_backend_t *)be;
}
#endif /* HAVE_NSSWITCH_H */
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