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 #include <sys/types.h>
  30 #ifdef HAVE_CRYPT_H
  31 # include <crypt.h>
  32 #endif
  33 #include <pwd.h>
  34 #include <stdarg.h>
  35 #include <stdlib.h>
  36 #include <stdio.h>
  37 #include <string.h>
  38
  39 #include "xmalloc.h"
  40 #include "packet.h"
  41 #include "buffer.h"
  42 #include "auth-options.h"
  43 #include "log.h"
  44 #include "servconf.h"
  45 #include "key.h"
  46 #include "hostfile.h"
  47 #include "auth.h"
  48 #include "ssh.h"
  49
  50 int nischeck(char *);
  51
  52 int
  53 sys_auth_passwd(Authctxt *authctxt, const char *password)
  54 {
  55         struct passwd *pw = authctxt->pw;
  56         char *salt;
  57         int result;
  58
  59         /* Just use the supplied fake password if authctxt is invalid */
  60         char *pw_password = authctxt->valid ? shadow_pw(pw) : pw->pw_passwd;
  61
  62         /* Check for users with no password. */
  63         if (strcmp(pw_password, "") == 0 && strcmp(password, "") == 0)
  64                 return (1);
  65
  66         /* Encrypt the candidate password using the proper salt. */
  67         salt = (pw_password[0] && pw_password[1]) ? pw_password : "xx";
  68
  69         /*
  70          * Authentication is accepted if the encrypted passwords
  71          * are identical.
  72          */
  73 #ifdef UNIXWARE_LONG_PASSWORDS
  74         if (!nischeck(pw->pw_name)) {
  75                 result = ((strcmp(bigcrypt(password, salt), pw_password) == 0)
  76                 ||  (strcmp(osr5bigcrypt(password, salt), pw_password) == 0));
  77         }
  78         else
  79 #endif /* UNIXWARE_LONG_PASSWORDS */
  80                 result = (strcmp(xcrypt(password, salt), pw_password) == 0);
  81
  82 #ifdef USE_LIBIAF
  83         if (authctxt->valid)
  84                 free(pw_password);
  85 #endif
  86         return(result);
  87 }
  88
  89 #ifdef UNIXWARE_LONG_PASSWORDS
  90 int
  91 nischeck(char *namep)
  92 {
  93         char password_file[] = "/etc/passwd";
  94         FILE *fd;
  95         struct passwd *ent = NULL;
  96
  97         if ((fd = fopen (password_file, "r")) == NULL) {
  98                 /*
  99                  * If the passwd file has dissapeared we are in a bad state.
 100                  * However, returning 0 will send us back through the
 101                  * authentication scheme that has checked the ia database for
 102                  * passwords earlier.
 103                  */
 104                 return(0);
 105         }
 106
 107         /*
 108          * fgetpwent() only reads from password file, so we know for certain
 109          * that the user is local.
 110          */
 111         while (ent = fgetpwent(fd)) {
 112                 if (strcmp (ent->pw_name, namep) == 0) {
 113                         /* Local user */
 114                         fclose (fd);
 115                         return(0);
 116                 }
 117         }
 118
 119         fclose (fd);
 120         return (1);
 121 }
 122
 123 #endif /* UNIXWARE_LONG_PASSWORDS */
 124
 125 /*
 126         NOTE: ia_get_logpwd() allocates memory for arg 2
 127         functions that call shadow_pw() will need to free
 128  */
 129
 130 #ifdef USE_LIBIAF
 131 char *
 132 get_iaf_password(struct passwd *pw)
 133 {
 134         char *pw_password = NULL;
 135
 136         uinfo_t uinfo;
 137         if (!ia_openinfo(pw->pw_name,&uinfo)) {
 138                 ia_get_logpwd(uinfo, &pw_password);
 139                 if (pw_password == NULL)
 140                         fatal("ia_get_logpwd: Unable to get the shadow passwd");
 141                 ia_closeinfo(uinfo);
 142                 return pw_password;
 143         }
 144         else
 145                 fatal("ia_openinfo: Unable to open the shadow passwd file");
 146 }
 147 #endif /* USE_LIBIAF */
 148 #endif /* HAVE_LIBIAF */
 149