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/*
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passwd.c - NSS lookup functions for passwd database
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Copyright (C) 2006 West Consulting
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Copyright (C) 2006-2015 Arthur de Jong
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Copyright (C) 2010 Symas Corporation
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA
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*/
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#include "config.h"
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#include <string.h>
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#include <errno.h>
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#include "prototypes.h"
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#include "common.h"
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#include "compat/attrs.h"
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/* read a passwd entry from the stream */
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static nss_status_t read_passwd(TFILE *fp, struct passwd *result,
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char *buffer, size_t buflen, int *errnop)
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{
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int32_t tmpint32;
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size_t bufptr = 0;
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memset(result, 0, sizeof(struct passwd));
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READ_BUF_STRING(fp, result->pw_name);
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READ_BUF_STRING(fp, result->pw_passwd);
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READ_INT32(fp, result->pw_uid);
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READ_INT32(fp, result->pw_gid);
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READ_BUF_STRING(fp, result->pw_gecos);
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READ_BUF_STRING(fp, result->pw_dir);
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READ_BUF_STRING(fp, result->pw_shell);
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#ifdef HAVE_STRUCT_PASSWD_PW_CLASS
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/* set the user access class to an empty string */
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result->pw_class = result->pw_name + strlen(result->pw_name);
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#endif /* HAVE_STRUCT_PASSWD_PW_CLASS */
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return NSS_STATUS_SUCCESS;
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}
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#ifdef NSS_FLAVOUR_GLIBC
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/* get a single passwd entry by name */
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nss_status_t NSS_NAME(getpwnam_r)(const char *name, struct passwd *result,
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char *buffer, size_t buflen, int *errnop)
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{
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NSS_GETONE(NSLCD_ACTION_PASSWD_BYNAME,
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WRITE_STRING(fp, name),
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read_passwd(fp, result, buffer, buflen, errnop));
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}
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/* get a single passwd entry by uid */
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nss_status_t NSS_NAME(getpwuid_r)(uid_t uid, struct passwd *result,
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char *buffer, size_t buflen, int *errnop)
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{
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NSS_GETONE(NSLCD_ACTION_PASSWD_BYUID,
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WRITE_INT32(fp, uid),
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read_passwd(fp, result, buffer, buflen, errnop));
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}
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/* thread-local file pointer to an ongoing request */
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static TLS TFILE *pwentfp;
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/* open a connection to read all passwd entries */
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nss_status_t NSS_NAME(setpwent)(int UNUSED(stayopen))
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{
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NSS_SETENT(pwentfp);
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}
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/* read password data from an opened stream */
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nss_status_t NSS_NAME(getpwent_r)(struct passwd *result,
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char *buffer, size_t buflen, int *errnop)
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{
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NSS_GETENT(pwentfp, NSLCD_ACTION_PASSWD_ALL,
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read_passwd(pwentfp, result, buffer, buflen, errnop));
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}
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/* close the stream opened with setpwent() above */
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nss_status_t NSS_NAME(endpwent)(void)
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{
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NSS_ENDENT(pwentfp);
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}
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#endif /* NSS_FLAVOUR_GLIBC */
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#ifdef NSS_FLAVOUR_SOLARIS
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#ifdef HAVE_STRUCT_NSS_XBYY_ARGS_RETURNLEN
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static char *passwd2str(struct passwd *result, char *buffer, size_t buflen)
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{
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int res;
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res = snprintf(buffer, buflen, "%s:%s:%d:%d:%s:%s:%s",
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result->pw_name, result->pw_passwd, (int)result->pw_uid,
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(int)result->pw_gid, result->pw_gecos, result->pw_dir,
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result->pw_shell);
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if ((res < 0) || (res >= (int)buflen))
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return NULL;
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return buffer;
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}
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#endif /* HAVE_STRUCT_NSS_XBYY_ARGS_RETURNLEN */
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static nss_status_t read_result(TFILE *fp, nss_XbyY_args_t *args)
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{
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READ_RESULT(passwd, &args->erange);
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}
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static nss_status_t passwd_getpwnam(nss_backend_t UNUSED(*be), void *args)
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{
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NSS_GETONE(NSLCD_ACTION_PASSWD_BYNAME,
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WRITE_STRING(fp, NSS_ARGS(args)->key.name),
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read_result(fp, args));
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}
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static nss_status_t passwd_getpwuid(nss_backend_t UNUSED(*be), void *args)
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{
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NSS_GETONE(NSLCD_ACTION_PASSWD_BYUID,
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WRITE_INT32(fp, NSS_ARGS(args)->key.uid),
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read_result(fp, args));
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}
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/* open a connection to the nslcd and write the request */
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static nss_status_t passwd_setpwent(nss_backend_t *be, void UNUSED(*args))
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{
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NSS_SETENT(LDAP_BE(be)->fp);
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}
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/* read password data from an opened stream */
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static nss_status_t passwd_getpwent(nss_backend_t *be, void *args)
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{
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NSS_GETENT(LDAP_BE(be)->fp, NSLCD_ACTION_PASSWD_ALL,
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read_result(LDAP_BE(be)->fp, args));
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}
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/* close the stream opened with setpwent() above */
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static nss_status_t passwd_endpwent(nss_backend_t *be, void UNUSED(*args))
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{
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NSS_ENDENT(LDAP_BE(be)->fp);
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}
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static nss_backend_op_t passwd_ops[] = {
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nss_ldap_destructor,
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passwd_endpwent,
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passwd_setpwent,
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passwd_getpwent,
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passwd_getpwnam,
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passwd_getpwuid
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};
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nss_backend_t *NSS_NAME(passwd_constr)(const char UNUSED(*db_name),
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const char UNUSED(*src_name),
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const char UNUSED(*cfg_args))
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{
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return nss_ldap_constructor(passwd_ops, sizeof(passwd_ops));
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}
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#endif /* NSS_FLAVOUR_SOLARIS */
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