/*

   shadow.c - NSS lookup functions for shadow database

   Copyright (C) 2006 West Consulting

   Copyright (C) 2006-2015 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 single shadow entry from the stream */

static nss_status_t read_spwd(TFILE *fp, struct spwd *result,

                              char *buffer, size_t buflen, int *errnop)

{

  int32_t tmpint32;

  size_t bufptr = 0;

  memset(result, 0, sizeof(struct spwd));

  READ_BUF_STRING(fp, result->sp_namp);

  READ_BUF_STRING(fp, result->sp_pwdp);

  READ_INT32(fp, result->sp_lstchg);

  READ_INT32(fp, result->sp_min);

  READ_INT32(fp, result->sp_max);

  READ_INT32(fp, result->sp_warn);

  READ_INT32(fp, result->sp_inact);

  READ_INT32(fp, result->sp_expire);

  READ_INT32(fp, result->sp_flag);

  return NSS_STATUS_SUCCESS;

}

#ifdef NSS_FLAVOUR_GLIBC

/* get a shadow entry by name */

nss_status_t NSS_NAME(getspnam_r)(const char *name, struct spwd *result,

                                  char *buffer, size_t buflen, int *errnop)

{

  NSS_GETONE(NSLCD_ACTION_SHADOW_BYNAME,

             WRITE_STRING(fp, name),

             read_spwd(fp, result, buffer, buflen, errnop));

}

/* thread-local file pointer to an ongoing request */

static TLS TFILE *spentfp;

/* start listing all shadow users */

nss_status_t NSS_NAME(setspent)(int UNUSED(stayopen))

{

  NSS_SETENT(spentfp);

}

/* return a single shadow entry read from the stream */

nss_status_t NSS_NAME(getspent_r)(struct spwd *result,

                                  char *buffer, size_t buflen, int *errnop)

{

  NSS_GETENT(spentfp, NSLCD_ACTION_SHADOW_ALL,

             read_spwd(spentfp, result, buffer, buflen, errnop));

}

/* close the stream opened by setspent() above */

nss_status_t NSS_NAME(endspent)(void)

{

  NSS_ENDENT(spentfp);

}

#endif /* NSS_FLAVOUR_GLIBC */

#ifdef NSS_FLAVOUR_SOLARIS

#ifdef HAVE_STRUCT_NSS_XBYY_ARGS_RETURNLEN

static char *spwd2str(struct spwd *result, char *buffer, size_t buflen)

{

  /* snprintf writes a terminating \0 on Solaris */

  snprintf(buffer, buflen, "%s:%s:", result->sp_namp, result->sp_pwdp);

  if (result->sp_lstchg >= 0)

    snprintf(buffer, buflen - strlen(buffer) - 1, "%d", result->sp_lstchg);

  strlcat(buffer, ":", buflen);

  if (result->sp_min >= 0)

    snprintf(buffer, buflen - strlen(buffer) - 1, "%d", result->sp_min);

  strlcat(buffer, ":", buflen);

  if (result->sp_max >= 0)

    snprintf(buffer, buflen - strlen(buffer) - 1, "%d", result->sp_max);

  strlcat(buffer, ":", buflen);

  if (result->sp_warn >= 0)

    snprintf(buffer, buflen - strlen(buffer) - 1, "%d", result->sp_warn);

  strlcat(buffer, ":", buflen);

  if (result->sp_inact >= 0)

    snprintf(buffer, buflen - strlen(buffer) - 1, "%d", result->sp_inact);

  strlcat(buffer, ":", buflen);

  if (result->sp_expire >= 0)

    snprintf(buffer, buflen - strlen(buffer) - 1, "%d", result->sp_expire);

  strlcat(buffer, ":", buflen);

  if (result->sp_flag > 0)

    snprintf(buffer, buflen - strlen(buffer) - 1, "%x", result->sp_flag);

  if (strlen(buffer) >= buflen - 1)

    return NULL;

  return buffer;

}

#endif /* HAVE_STRUCT_NSS_XBYY_ARGS_RETURNLEN */

static nss_status_t read_result(TFILE *fp, nss_XbyY_args_t *args)

{

  READ_RESULT(spwd, &args->erange);

}

static nss_status_t shadow_getspnam(nss_backend_t UNUSED(*be), void *args)

{

  NSS_GETONE(NSLCD_ACTION_SHADOW_BYNAME,

             WRITE_STRING(fp, NSS_ARGS(args)->key. name),

             read_result(fp, args));

}

static nss_status_t shadow_setspent(nss_backend_t *be, void UNUSED(*args))

{

  NSS_SETENT(LDAP_BE(be)->fp);

}

static nss_status_t shadow_getspent(nss_backend_t *be, void *args)

{

  NSS_GETENT(LDAP_BE(be)->fp, NSLCD_ACTION_SHADOW_ALL,

             read_result(LDAP_BE(be)->fp, args));

}

static nss_status_t shadow_endspent(nss_backend_t *be, void UNUSED(*args))

{

  NSS_ENDENT(LDAP_BE(be)->fp);

}

static nss_backend_op_t shadow_ops[] = {

  nss_ldap_destructor,

  shadow_endspent,

  shadow_setspent,

  shadow_getspent,

  shadow_getspnam

};

nss_backend_t *NSS_NAME(shadow_constr)(const char UNUSED(*db_name),

                                       const char UNUSED(*src_name),

                                       const char UNUSED(*cfg_args))

{

  return nss_ldap_constructor(shadow_ops, sizeof(shadow_ops));

}

#endif /* NSS_FLAVOUR_SOLARIS */