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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"
/* read a passwd entry from the stream */
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 NSS_FLAVOUR_GLIBC
/* get a single passwd entry by name */
nss_status_t _nss_ldap_getpwnam_r(
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));
}
/* get a single passwd entry by uid */
nss_status_t _nss_ldap_getpwuid_r(
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 read all passwd entries */
nss_status_t _nss_ldap_setpwent(int UNUSED(stayopen))
{
NSS_SETENT(pwentfp);
}
/* read password data from an opened stream */
nss_status_t _nss_ldap_getpwent_r(
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 */
nss_status_t _nss_ldap_endpwent(void)
{
NSS_ENDENT(pwentfp);
}
#endif /* NSS_FLAVOUR_GLIBC */
#ifdef NSS_FLAVOUR_SOLARIS
#ifdef HAVE_STRUCT_NSS_XBYY_ARGS_RETURNLEN
static nss_status_t read_passwdstring(TFILE *fp,nss_XbyY_args_t *args)
{
struct passwd result;
nss_status_t retv;
char *buffer;
size_t buflen;
/* read the passwd */
retv=read_passwd(fp,&result,NSS_ARGS(args)->buf.buffer,args->buf.buflen,&errno);
if (retv!=NSS_STATUS_SUCCESS)
return retv;
/* allocate a temporary buffer */
buflen=args->buf.buflen;
buffer=(char *)malloc(buflen);
/* build the formatted string */
/* FIXME: implement proper buffer size checking */
sprintf(buffer,"%s:%s:%d:%d:%s:%s:%s",
result.pw_name,result.pw_passwd,(int)result.pw_uid,(int)result.pw_gid,result.pw_gecos,
result.pw_dir,result.pw_shell);
/* copy the result back to the result buffer and free the temporary one */
strcpy(NSS_ARGS(args)->buf.buffer,buffer);
free(buffer);
NSS_ARGS(args)->returnval=NSS_ARGS(args)->buf.buffer;
NSS_ARGS(args)->returnlen=strlen(NSS_ARGS(args)->buf.buffer);
return NSS_STATUS_SUCCESS;
}
#define READ_RESULT(fp) \
NSS_ARGS(args)->buf.result? \
read_passwd(fp,(struct passwd *)NSS_ARGS(args)->buf.result,NSS_ARGS(args)->buf.buffer,NSS_ARGS(args)->buf.buflen,&errno): \
read_passwdstring(fp,args); \
if ((NSS_ARGS(args)->buf.result)&&(retv==NSS_STATUS_SUCCESS)) \
NSS_ARGS(args)->returnval=NSS_ARGS(args)->buf.result;
#else /* not HAVE_STRUCT_NSS_XBYY_ARGS_RETURNLEN */
#define READ_RESULT(fp) \
read_passwd(fp,(struct passwd *)NSS_ARGS(args)->buf.result,NSS_ARGS(args)->buf.buffer,NSS_ARGS(args)->buf.buflen,&errno); \
if (retv==NSS_STATUS_SUCCESS) \
NSS_ARGS(args)->returnval=NSS_ARGS(args)->buf.result;
#endif /* not HAVE_STRUCT_NSS_XBYY_ARGS_RETURNLEN */
static nss_status_t passwd_getpwnam(nss_backend_t UNUSED(*be),void *args)
{
NSS_BYNAME(NSLCD_ACTION_PASSWD_BYNAME,
NSS_ARGS(args)->key.name,
READ_RESULT(fp));
}
static nss_status_t passwd_getpwuid(nss_backend_t UNUSED(*be),void *args)
{
NSS_BYTYPE(NSLCD_ACTION_PASSWD_BYUID,
NSS_ARGS(args)->key.uid,uid_t,
READ_RESULT(fp));
}
/* open a connection to the nslcd and write the request */
static nss_status_t passwd_setpwent(nss_backend_t *be,void UNUSED(*args))
{
NSS_SETENT(LDAP_BE(be)->fp);
}
/* read password data from an opened stream */
static nss_status_t passwd_getpwent(nss_backend_t *be,void *args)
{
NSS_GETENT(LDAP_BE(be)->fp,NSLCD_ACTION_PASSWD_ALL,
READ_RESULT(LDAP_BE(be)->fp));
}
/* close the stream opened with setpwent() above */
static nss_status_t passwd_endpwent(nss_backend_t *be,void UNUSED(*args))
{
NSS_ENDENT(LDAP_BE(be)->fp);
}
static nss_backend_op_t passwd_ops[]={
nss_ldap_destructor,
passwd_endpwent,
passwd_setpwent,
passwd_getpwent,
passwd_getpwnam,
passwd_getpwuid
};
nss_backend_t *_nss_ldap_passwd_constr(const char UNUSED(*db_name),
const char UNUSED(*src_name),const char UNUSED(*cfg_args))
{
return nss_ldap_constructor(passwd_ops,sizeof(passwd_ops));
}
#endif /* NSS_FLAVOUR_SOLARIS */
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