-/* Copyright (C) 1996, 1997, 1998, 2001 Free Software Foundation, Inc.
+/* Copyright (C) 1996-2020 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.
+ 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.
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.
+ Lesser 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. */
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <https://www.gnu.org/licenses/>. */
-#include <nss.h>
-#include <pwd.h>
+#include <assert.h>
#include <ctype.h>
#include <errno.h>
+#include <nss.h>
+#include <pwd.h>
#include <string.h>
-#include <bits/libc-lock.h>
+#include <libc-lock.h>
#include <rpcsvc/yp.h>
#include <rpcsvc/ypclnt.h>
#include "nss-nis.h"
+#include <libnsl.h>
/* Get the declaration of the parser function. */
#define ENTNAME pwent
/* Protect global state against multiple changers */
__libc_lock_define_initialized (static, lock)
-static bool_t new_start = 1;
+static bool new_start = true;
static char *oldkey;
static int oldkeylen;
+static intern_t intern;
-enum nss_status
-_nss_nis_setpwent (int stayopen)
+
+int
+_nis_saveit (int instatus, char *inkey, int inkeylen, char *inval,
+ int invallen, char *indata)
{
- __libc_lock_lock (lock);
+ intern_t *intern = (intern_t *) indata;
+
+ if (instatus != YP_TRUE)
+ return 1;
- new_start = 1;
- if (oldkey != NULL)
+ if (inkey && inkeylen > 0 && inval && invallen > 0)
{
- free (oldkey);
- oldkey = NULL;
- oldkeylen = 0;
+ struct response_t *bucket = intern->next;
+
+ if (__glibc_unlikely (bucket == NULL))
+ {
+#define MINSIZE 4096 - 4 * sizeof (void *)
+ const size_t minsize = MAX (MINSIZE, 2 * (invallen + 1));
+ bucket = malloc (sizeof (struct response_t) + minsize);
+ if (bucket == NULL)
+ /* We have no error code for out of memory. */
+ return 1;
+
+ bucket->next = NULL;
+ bucket->size = minsize;
+ intern->start = intern->next = bucket;
+ intern->offset = 0;
+ }
+ else if (__builtin_expect (invallen + 1 > bucket->size - intern->offset,
+ 0))
+ {
+ /* We need a new (larger) buffer. */
+ const size_t newsize = 2 * MAX (bucket->size, invallen + 1);
+ struct response_t *newp = malloc (sizeof (struct response_t)
+ + newsize);
+ if (newp == NULL)
+ /* We have no error code for out of memory. */
+ return 1;
+
+ /* Mark the old bucket as full. */
+ bucket->size = intern->offset;
+
+ newp->next = NULL;
+ newp->size = newsize;
+ bucket = intern->next = bucket->next = newp;
+ intern->offset = 0;
+ }
+
+ char *p = mempcpy (&bucket->mem[intern->offset], inval, invallen);
+ if (__glibc_unlikely (p[-1] != '\0'))
+ {
+ *p = '\0';
+ ++invallen;
+ }
+ intern->offset += invallen;
}
- __libc_lock_unlock (lock);
+ return 0;
+}
- return NSS_STATUS_SUCCESS;
+
+static void
+internal_nis_endpwent (void)
+{
+ new_start = true;
+ free (oldkey);
+ oldkey = NULL;
+ oldkeylen = 0;
+
+ struct response_t *curr = intern.start;
+
+ while (curr != NULL)
+ {
+ struct response_t *last = curr;
+ curr = curr->next;
+ free (last);
+ }
+
+ intern.next = intern.start = NULL;
}
+
enum nss_status
_nss_nis_endpwent (void)
{
__libc_lock_lock (lock);
- new_start = 1;
- if (oldkey != NULL)
- {
- free (oldkey);
- oldkey = NULL;
- oldkeylen = 0;
- }
+ internal_nis_endpwent ();
__libc_lock_unlock (lock);
return NSS_STATUS_SUCCESS;
}
+
+enum nss_status
+internal_nis_setpwent (void)
+{
+ /* We have to read all the data now. */
+ char *domain;
+ if (__glibc_unlikely (yp_get_default_domain (&domain)))
+ return NSS_STATUS_UNAVAIL;
+
+ struct ypall_callback ypcb;
+
+ ypcb.foreach = _nis_saveit;
+ ypcb.data = (char *) &intern;
+ enum nss_status status = yperr2nss (yp_all (domain, "passwd.byname", &ypcb));
+
+
+ /* Mark the last buffer as full. */
+ if (intern.next != NULL)
+ intern.next->size = intern.offset;
+
+ intern.next = intern.start;
+ intern.offset = 0;
+
+ return status;
+}
+
+
+enum nss_status
+_nss_nis_setpwent (int stayopen)
+{
+ enum nss_status result = NSS_STATUS_SUCCESS;
+
+ __libc_lock_lock (lock);
+
+ internal_nis_endpwent ();
+
+ if (_nsl_default_nss () & NSS_FLAG_SETENT_BATCH_READ)
+ result = internal_nis_setpwent ();
+
+ __libc_lock_unlock (lock);
+
+ return result;
+}
+
+
static enum nss_status
internal_nis_getpwent_r (struct passwd *pwd, char *buffer, size_t buflen,
int *errnop)
{
- struct parser_data *data = (void *) buffer;
- char *domain;
- int parse_res;
+ /* If we read the entire database at setpwent time we just iterate
+ over the data we have in memory. */
+ bool batch_read = intern.start != NULL;
- if (yp_get_default_domain (&domain))
+ char *domain = NULL;
+ if (!batch_read && __builtin_expect (yp_get_default_domain (&domain), 0))
return NSS_STATUS_UNAVAIL;
/* Get the next entry until we found a correct one. */
+ int parse_res;
do
{
- enum nss_status retval;
- char *result, *outkey, *result2, *p;
- int len, keylen, len2;
- size_t namelen;
+ char *result;
+ char *outkey;
+ int len;
+ int keylen;
+
+ if (batch_read)
+ {
+ struct response_t *bucket;
- if (new_start)
- retval = yperr2nss (yp_first (domain, "passwd.byname",
- &outkey, &keylen, &result, &len));
+ handle_batch_read:
+ bucket = intern.next;
+
+ if (__glibc_unlikely (intern.offset >= bucket->size))
+ {
+ if (bucket->next == NULL)
+ return NSS_STATUS_NOTFOUND;
+
+ /* We look at all the content in the current bucket. Go on
+ to the next. */
+ bucket = intern.next = bucket->next;
+ intern.offset = 0;
+ }
+
+ for (result = &bucket->mem[intern.offset]; isspace (*result);
+ ++result)
+ ++intern.offset;
+
+ len = strlen (result);
+ }
else
- retval = yperr2nss ( yp_next (domain, "passwd.byname",
- oldkey, oldkeylen,
- &outkey, &keylen, &result, &len));
-
- if (retval != NSS_STATUS_SUCCESS)
- {
- if (retval == NSS_STATUS_NOTFOUND)
- *errnop = ENOENT;
- else if (retval == NSS_STATUS_TRYAGAIN)
- *errnop = errno;
- return retval;
- }
+ {
+ int yperr;
+
+ if (new_start)
+ {
+ /* Maybe we should read the database in one piece. */
+ if ((_nsl_default_nss () & NSS_FLAG_SETENT_BATCH_READ)
+ && internal_nis_setpwent () == NSS_STATUS_SUCCESS
+ && intern.start != NULL)
+ {
+ batch_read = true;
+ goto handle_batch_read;
+ }
+
+ yperr = yp_first (domain, "passwd.byname", &outkey, &keylen,
+ &result, &len);
+ }
+ else
+ yperr = yp_next (domain, "passwd.byname", oldkey, oldkeylen,
+ &outkey, &keylen, &result, &len);
+
+ if (__glibc_unlikely (yperr != YPERR_SUCCESS))
+ {
+ enum nss_status retval = yperr2nss (yperr);
+
+ if (retval == NSS_STATUS_TRYAGAIN)
+ *errnop = errno;
+ return retval;
+ }
+ }
/* Check for adjunct style secret passwords. They can be
- recognized by a password starting with "##". */
- p = strchr (result, ':');
- if (p != NULL /* This better should be true in all cases. */
+ recognized by a password starting with "##". We do not use
+ it if the passwd.adjunct.byname table is supposed to be used
+ as a shadow.byname replacement. */
+ char *p = strchr (result, ':');
+ size_t namelen;
+ char *result2;
+ int len2;
+ if ((_nsl_default_nss () & NSS_FLAG_ADJUNCT_AS_SHADOW) == 0
+ && p != NULL /* This better should be true in all cases. */
&& p[1] == '#' && p[2] == '#'
&& (namelen = p - result,
yp_match (domain, "passwd.adjunct.byname", result, namelen,
&result2, &len2)) == YPERR_SUCCESS)
{
- /* We found a passwd.adjunct entry. Merge encrypted
+ /* We found a passwd.adjunct.byname entry. Merge encrypted
password therein into original result. */
char *encrypted = strchr (result2, ':');
char *endp;
}
restlen = len - (p - result);
- if ((size_t) (namelen + (endp - encrypted) + restlen + 2) > buflen)
+ if (__builtin_expect ((size_t) (namelen + (endp - encrypted)
+ + restlen + 2) > buflen, 0))
{
free (result2);
free (result);
return NSS_STATUS_TRYAGAIN;
}
- __mempcpy (__mempcpy (__mempcpy (__mempcpy (buffer, result, namelen),
- ":", 1),
- encrypted, endp - encrypted),
- p, restlen + 1);
+ mempcpy (mempcpy (mempcpy (mempcpy (buffer, result, namelen),
+ ":", 1),
+ encrypted, endp - encrypted),
+ p, restlen + 1);
p = buffer;
free (result2);
else
{
non_adjunct:
- if ((size_t) (len + 1) > buflen)
+ if (__glibc_unlikely ((size_t) (len + 1) > buflen))
{
free (result);
*errnop = ERANGE;
return NSS_STATUS_TRYAGAIN;
}
- p = strncpy (buffer, result, len);
- buffer[len] = '\0';
+ p = buffer;
+ *((char *) mempcpy (buffer, result, len)) = '\0';
}
while (isspace (*p))
- ++p;
- free (result);
+ ++p;
+ if (!batch_read)
+ free (result);
- parse_res = _nss_files_parse_pwent (p, pwd, data, buflen, errnop);
- if (parse_res == -1)
+ parse_res = _nss_files_parse_pwent (p, pwd, (void *) buffer, buflen,
+ errnop);
+ if (__glibc_unlikely (parse_res == -1))
{
- free (outkey);
+ if (!batch_read)
+ free (outkey);
*errnop = ERANGE;
return NSS_STATUS_TRYAGAIN;
}
- free (oldkey);
- oldkey = outkey;
- oldkeylen = keylen;
- new_start = 0;
+ if (batch_read)
+ intern.offset += len + 1;
+ else
+ {
+ free (oldkey);
+ oldkey = outkey;
+ oldkeylen = keylen;
+ new_start = false;
+ }
}
while (parse_res < 1);
_nss_nis_getpwnam_r (const char *name, struct passwd *pwd,
char *buffer, size_t buflen, int *errnop)
{
- struct parser_data *data = (void *) buffer;
- enum nss_status retval;
- char *domain, *result, *result2, *p;
- int len, len2, parse_res;
- size_t namelen;
-
if (name == NULL)
{
*errnop = EINVAL;
return NSS_STATUS_UNAVAIL;
}
- if (yp_get_default_domain (&domain))
+ char *domain;
+ if (__glibc_unlikely (yp_get_default_domain (&domain)))
return NSS_STATUS_UNAVAIL;
- namelen = strlen (name);
+ size_t namelen = strlen (name);
- retval = yperr2nss (yp_match (domain, "passwd.byname", name,
- namelen, &result, &len));
+ char *result;
+ int len;
+ int yperr = yp_match (domain, "passwd.byname", name, namelen, &result, &len);
- if (retval != NSS_STATUS_SUCCESS)
+ if (__glibc_unlikely (yperr != YPERR_SUCCESS))
{
- if (retval == NSS_STATUS_NOTFOUND)
- *errnop = ENOENT;
- else if (retval == NSS_STATUS_TRYAGAIN)
+ enum nss_status retval = yperr2nss (yperr);
+
+ if (retval == NSS_STATUS_TRYAGAIN)
*errnop = errno;
return retval;
}
/* Check for adjunct style secret passwords. They can be recognized
- by a password starting with "##". */
- p = strchr (result, ':');
- if (p != NULL /* This better should be true in all cases. */
+ by a password starting with "##". We do not use it if the
+ passwd.adjunct.byname table is supposed to be used as a shadow.byname
+ replacement. */
+ char *result2;
+ int len2;
+ char *p = strchr (result, ':');
+ if ((_nsl_default_nss () & NSS_FLAG_ADJUNCT_AS_SHADOW) == 0
+ && p != NULL /* This better should be true in all cases. */
&& p[1] == '#' && p[2] == '#'
&& yp_match (domain, "passwd.adjunct.byname", name, namelen,
&result2, &len2) == YPERR_SUCCESS)
{
- /* We found a passwd.adjunct entry. Merge encrypted password
+ /* We found a passwd.adjunct.byname entry. Merge encrypted password
therein into original result. */
char *encrypted = strchr (result2, ':');
char *endp;
- size_t restlen;
if (encrypted == NULL
|| (endp = strchr (++encrypted, ':')) == NULL
goto non_adjunct;
}
- restlen = len - (p - result);
- if ((size_t) (namelen + (endp - encrypted) + restlen + 2) > buflen)
+ size_t restlen = len - (p - result);
+ if (__builtin_expect ((size_t) (namelen + (endp - encrypted)
+ + restlen + 2) > buflen, 0))
{
free (result2);
free (result);
else
{
non_adjunct:
- if ((size_t) (len + 1) > buflen)
+ if (__glibc_unlikely ((size_t) (len + 1) > buflen))
{
free (result);
*errnop = ERANGE;
++p;
free (result);
- parse_res = _nss_files_parse_pwent (p, pwd, data, buflen, errnop);
- if (parse_res < 1)
+ int parse_res = _nss_files_parse_pwent (p, pwd, (void *) buffer, buflen,
+ errnop);
+ if (__glibc_unlikely (parse_res < 1))
{
if (parse_res == -1)
- return NSS_STATUS_TRYAGAIN;
+ return NSS_STATUS_TRYAGAIN;
else
- {
- *errnop = ENOENT;
- return NSS_STATUS_NOTFOUND;
- }
+ return NSS_STATUS_NOTFOUND;
}
else
return NSS_STATUS_SUCCESS;
_nss_nis_getpwuid_r (uid_t uid, struct passwd *pwd,
char *buffer, size_t buflen, int *errnop)
{
- struct parser_data *data = (void *) buffer;
- enum nss_status retval;
- char *domain, *result, *p, *result2;
- int len, nlen, parse_res, len2;
- char buf[32];
- size_t namelen;
-
- if (yp_get_default_domain (&domain))
+ char *domain;
+ if (__glibc_unlikely (yp_get_default_domain (&domain)))
return NSS_STATUS_UNAVAIL;
- nlen = sprintf (buf, "%d", uid);
+ char buf[32];
+ int nlen = snprintf (buf, sizeof (buf), "%lu", (unsigned long int) uid);
- retval = yperr2nss (yp_match (domain, "passwd.byuid", buf,
- nlen, &result, &len));
+ char *result;
+ int len;
+ int yperr = yp_match (domain, "passwd.byuid", buf, nlen, &result, &len);
- if (retval != NSS_STATUS_SUCCESS)
+ if (__glibc_unlikely (yperr != YPERR_SUCCESS))
{
- if (retval == NSS_STATUS_NOTFOUND)
- *errnop = ENOENT;
- else if (retval == NSS_STATUS_TRYAGAIN)
+ enum nss_status retval = yperr2nss (yperr);
+
+ if (retval == NSS_STATUS_TRYAGAIN)
*errnop = errno;
return retval;
}
/* Check for adjunct style secret passwords. They can be recognized
- by a password starting with "##". */
- p = strchr (result, ':');
- if (p != NULL /* This better should be true in all cases. */
+ by a password starting with "##". We do not use it if the
+ passwd.adjunct.byname table is supposed to be used as a shadow.byname
+ replacement. */
+ char *result2;
+ int len2;
+ size_t namelen;
+ char *p = strchr (result, ':');
+ if ((_nsl_default_nss () & NSS_FLAG_ADJUNCT_AS_SHADOW) == 0
+ && p != NULL /* This better should be true in all cases. */
&& p[1] == '#' && p[2] == '#'
&& (namelen = p - result,
yp_match (domain, "passwd.adjunct.byname", result, namelen,
&result2, &len2)) == YPERR_SUCCESS)
{
- /* We found a passwd.adjunct entry. Merge encrypted password
+ /* We found a passwd.adjunct.byname entry. Merge encrypted password
therein into original result. */
char *encrypted = strchr (result2, ':');
char *endp;
}
restlen = len - (p - result);
- if ((size_t) (namelen + (endp - encrypted) + restlen + 2) > buflen)
+ if (__builtin_expect ((size_t) (namelen + (endp - encrypted)
+ + restlen + 2) > buflen, 0))
{
free (result2);
free (result);
else
{
non_adjunct:
- if ((size_t) (len + 1) > buflen)
+ if (__glibc_unlikely ((size_t) (len + 1) > buflen))
{
free (result);
*errnop = ERANGE;
++p;
free (result);
- parse_res = _nss_files_parse_pwent (p, pwd, data, buflen, errnop);
- if (parse_res < 1)
+ int parse_res = _nss_files_parse_pwent (p, pwd, (void *) buffer, buflen,
+ errnop);
+ if (__glibc_unlikely (parse_res < 1))
{
if (parse_res == -1)
- return NSS_STATUS_TRYAGAIN;
+ return NSS_STATUS_TRYAGAIN;
else
- {
- *errnop = ENOENT;
- return NSS_STATUS_NOTFOUND;
- }
+ return NSS_STATUS_NOTFOUND;
}
else
return NSS_STATUS_SUCCESS;
projects / thirdparty / glibc.git / blobdiff