openbsd-compat/port-uw.c

   1 /*
   2  * Copyright (c) 2005 The SCO Group. All rights reserved.
   3  * Copyright (c) 2005 Tim Rice. All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  15  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  16  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  17  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  18  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  19  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  20  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  21  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  23  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  24  */
  25
  26 #include "includes.h"
  27
  28 #ifdef HAVE_LIBIAF
  29 #ifdef HAVE_CRYPT_H
  30 #include <crypt.h>
  31 #endif
  32 #include "packet.h"
  33 #include "buffer.h"
  34 #include "log.h"
  35 #include "servconf.h"
  36 #include "auth.h"
  37 #include "auth-options.h"
  38
  39 int nischeck(char *);
  40
  41 int
  42 sys_auth_passwd(Authctxt *authctxt, const char *password)
  43 {
  44         struct passwd *pw = authctxt->pw;
  45         char *salt;
  46         int result;
  47
  48         /* Just use the supplied fake password if authctxt is invalid */
  49         char *pw_password = authctxt->valid ? shadow_pw(pw) : pw->pw_passwd;
  50
  51         /* Check for users with no password. */
  52         if (strcmp(pw_password, "") == 0 && strcmp(password, "") == 0)
  53                 return (1);
  54
  55         /* Encrypt the candidate password using the proper salt. */
  56         salt = (pw_password[0] && pw_password[1]) ? pw_password : "xx";
  57
  58         /*
  59          * Authentication is accepted if the encrypted passwords
  60          * are identical.
  61          */
  62 #ifdef UNIXWARE_LONG_PASSWORDS
  63         if (!nischeck(pw->pw_name)) {
  64                 result = ((strcmp(bigcrypt(password, salt), pw_password) == 0)
  65                 ||  (strcmp(osr5bigcrypt(password, salt), pw_password) == 0));
  66         }
  67         else
  68 #endif /* UNIXWARE_LONG_PASSWORDS */
  69                 result = (strcmp(xcrypt(password, salt), pw_password) == 0);
  70
  71 #if !defined(BROKEN_LIBIAF)
  72         if (authctxt->valid)
  73                 free(pw_password);
  74 #endif
  75         return(result);
  76 }
  77
  78 #ifdef UNIXWARE_LONG_PASSWORDS
  79 int
  80 nischeck(char *namep)
  81 {
  82         char password_file[] = "/etc/passwd";
  83         FILE *fd;
  84         struct passwd *ent = NULL;
  85
  86         if ((fd = fopen (password_file, "r")) == NULL) {
  87                 /*
  88                  * If the passwd file has dissapeared we are in a bad state.
  89                  * However, returning 0 will send us back through the
  90                  * authentication scheme that has checked the ia database for
  91                  * passwords earlier.
  92                  */
  93                 return(0);
  94         }
  95
  96         /*
  97          * fgetpwent() only reads from password file, so we know for certain
  98          * that the user is local.
  99          */
 100         while (ent = fgetpwent(fd)) {
 101                 if (strcmp (ent->pw_name, namep) == 0) {
 102                         /* Local user */
 103                         fclose (fd);
 104                         return(0);
 105                 }
 106         }
 107
 108         fclose (fd);
 109         return (1);
 110 }
 111
 112 #endif /* UNIXWARE_LONG_PASSWORDS */
 113
 114 /*
 115         NOTE: ia_get_logpwd() allocates memory for arg 2
 116         functions that call shadow_pw() will need to free
 117  */
 118
 119 #if !defined(BROKEN_LIBIAF)
 120 char *
 121 get_iaf_password(struct passwd *pw)
 122 {
 123         char *pw_password = NULL;
 124
 125         uinfo_t uinfo;
 126         if (!ia_openinfo(pw->pw_name,&uinfo)) {
 127                 ia_get_logpwd(uinfo, &pw_password);
 128                 if (pw_password == NULL)
 129                         fatal("ia_get_logpwd: Unable to get the shadow passwd");
 130                 ia_closeinfo(uinfo);
 131                 return pw_password;
 132         }
 133         else
 134                 fatal("ia_openinfo: Unable to open the shadow passwd file");
 135 }
 136 #endif /* !BROKEN_LIBIAF */
 137 #endif /* HAVE_LIBIAF */
 138