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/* Copyright (C) 1996, 1997 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Thorsten Kukuk <kukuk@vt.uni-paderborn.de>, 1996.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include <nss.h>
#include <ctype.h>
#include <errno.h>
#include <string.h>
#include <syslog.h>
#include <bits/libc-lock.h>
#include <rpc/rpc.h>
#include <rpcsvc/yp.h>
#include <rpcsvc/ypclnt.h>
#if defined (HAVE_SECURE_RPC)
#include <rpc/key_prot.h>
extern int xdecrypt (char *, char *);
#endif
#include "nss-nis.h"
/* If we haven't found the entry, we give a SUCCESS and an empty key back. */
enum nss_status
_nss_nis_getpublickey (const char *netname, char *pkey)
{
enum nss_status retval;
char *domain, *result;
int len;
pkey[0] = 0;
if (netname == NULL)
{
__set_errno (EINVAL);
return NSS_STATUS_UNAVAIL;
}
domain = strchr (netname, '@');
if (!domain)
return NSS_STATUS_UNAVAIL;
domain++;
retval = yperr2nss (yp_match (domain, "publickey.byname", netname,
strlen (netname), &result, &len));
if (retval != NSS_STATUS_SUCCESS)
{
if (retval == NSS_STATUS_TRYAGAIN)
__set_errno (EAGAIN);
return retval;
}
if (result != NULL)
{
char *p = strchr (result, ':');
if (p != NULL)
*p = 0;
strcpy (pkey, result);
}
return NSS_STATUS_SUCCESS;
}
enum nss_status
_nss_nis_getsecretkey (const char *netname, char *skey, char *passwd)
{
#if defined (HAVE_SECURE_RPC)
enum nss_status retval;
char buf[1024];
char *domain, *result;
int len;
skey[0] = 0;
if (netname == NULL || passwd == NULL)
{
__set_errno (EINVAL);
return NSS_STATUS_UNAVAIL;
}
domain = strchr (netname, '@');
if (!domain)
return NSS_STATUS_UNAVAIL;
domain++;
retval = yperr2nss (yp_match (domain, "publickey.byname", netname,
strlen (netname), &result, &len));
if (retval != NSS_STATUS_SUCCESS)
{
if (retval == NSS_STATUS_TRYAGAIN)
__set_errno (EAGAIN);
return retval;
}
if (result != NULL)
{
char *p = strchr (result, ':');
if (p == NULL)
return NSS_STATUS_SUCCESS;
p++;
strcpy (buf, p);
if (!xdecrypt (buf, passwd))
return NSS_STATUS_SUCCESS;
if (memcmp (buf, &(buf[HEXKEYBYTES]), KEYCHECKSUMSIZE) != 0)
return NSS_STATUS_SUCCESS;
buf[HEXKEYBYTES] = 0;
strcpy (skey, buf);
}
#else
skey[0] = 0;
#endif
return NSS_STATUS_SUCCESS;
}
/* Parse uid and group information from the passed string.
The format of the string passed is uid:gid,grp,grp, ... */
static enum nss_status
parse_netid_str (const char *s, uid_t *uidp, gid_t *gidp, int *gidlenp,
gid_t *gidlist)
{
char *p;
int gidlen;
if (!s || !isdigit (*s))
{
syslog (LOG_ERR, "netname2user: expecting uid '%s'", s);
return NSS_STATUS_NOTFOUND; /* XXX need a better error */
}
/* Fetch the uid */
*uidp = (atoi (s));
if (*uidp == 0)
{
syslog (LOG_ERR, "netname2user: should not have uid 0");
return NSS_STATUS_NOTFOUND;
}
/* Now get the group list */
p = strchr (s, ':');
if (!p)
{
syslog (LOG_ERR, "netname2user: missing group id list in '%s'", s);
return NSS_STATUS_NOTFOUND;
}
++p; /* skip ':' */
if (!p || (!isdigit (*p)))
{
syslog (LOG_ERR, "netname2user: missing group id list in '%s'.", p);
return NSS_STATUS_NOTFOUND;
}
*gidp = (atoi (p));
gidlen = 0;
while ((p = strchr (p, ',')) != NULL)
{
p++;
gidlist[gidlen++] = atoi (p);
}
*gidlenp = gidlen;
return NSS_STATUS_SUCCESS;
}
enum nss_status
_nss_nis_netname2user (char netname[MAXNETNAMELEN + 1], uid_t *uidp,
gid_t *gidp, int *gidlenp, gid_t *gidlist)
{
char *domain;
int yperr;
char *lookup;
int len;
domain = strchr (netname, '@');
if (!domain)
return NSS_STATUS_UNAVAIL;
/* Point past the '@' character */
domain++;
lookup = NULL;
yperr = yp_match (domain, "netid.byname", netname, strlen (netname),
&lookup, &len);
switch (yperr)
{
case YPERR_SUCCESS:
break; /* the successful case */
case YPERR_DOMAIN:
case YPERR_KEY:
return NSS_STATUS_NOTFOUND;
case YPERR_MAP:
default:
return NSS_STATUS_UNAVAIL;
}
if (lookup)
{
enum nss_status err;
lookup[len] = '\0';
err = parse_netid_str (lookup, uidp, gidp, gidlenp, gidlist);
free (lookup);
return err;
}
else
return NSS_STATUS_NOTFOUND;
return NSS_STATUS_SUCCESS;
}
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