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 #if defined(HAVE_LIBIAF) && !defined(HAVE_SECUREWARE) 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 "auth-options.h" 42 #include "log.h" 43 #include "misc.h" /* servconf.h needs misc.h for struct ForwardOptions */ 44 #include "servconf.h" 45 #include "hostfile.h" 46 #include "auth.h" 47 #include "ssh.h" 48 #include "ssh_api.h" 49 50 int nischeck(char *); 51 52 int 53 sys_auth_passwd(struct ssh *ssh, const char *password) 54 { 55 Authctxt *authctxt = ssh->authctxt; 56 struct passwd *pw = authctxt->pw; 57 char *salt; 58 int result; 59 60 /* Just use the supplied fake password if authctxt is invalid */ 61 char *pw_password = authctxt->valid ? shadow_pw(pw) : pw->pw_passwd; 62 63 /* Check for users with no password. */ 64 if (strcmp(pw_password, "") == 0 && strcmp(password, "") == 0) 65 return (1); 66 67 /* Encrypt the candidate password using the proper salt. */ 68 salt = (pw_password[0] && pw_password[1]) ? pw_password : "xx"; 69 70 /* 71 * Authentication is accepted if the encrypted passwords 72 * are identical. 73 */ 74 #ifdef UNIXWARE_LONG_PASSWORDS 75 if (!nischeck(pw->pw_name)) { 76 result = ((strcmp(bigcrypt(password, salt), pw_password) == 0) 77 || (strcmp(osr5bigcrypt(password, salt), pw_password) == 0)); 78 } 79 else 80 #endif /* UNIXWARE_LONG_PASSWORDS */ 81 result = (strcmp(xcrypt(password, salt), pw_password) == 0); 82 83 #ifdef USE_LIBIAF 84 if (authctxt->valid) 85 free(pw_password); 86 #endif 87 return(result); 88 } 89 90 #ifdef UNIXWARE_LONG_PASSWORDS 91 int 92 nischeck(char *namep) 93 { 94 char password_file[] = "/etc/passwd"; 95 FILE *fd; 96 struct passwd *ent = NULL; 97 98 if ((fd = fopen (password_file, "r")) == NULL) { 99 /* 100 * If the passwd file has disappeared we are in a bad state. 101 * However, returning 0 will send us back through the 102 * authentication scheme that has checked the ia database for 103 * passwords earlier. 104 */ 105 return(0); 106 } 107 108 /* 109 * fgetpwent() only reads from password file, so we know for certain 110 * that the user is local. 111 */ 112 while (ent = fgetpwent(fd)) { 113 if (strcmp (ent->pw_name, namep) == 0) { 114 /* Local user */ 115 fclose (fd); 116 return(0); 117 } 118 } 119 120 fclose (fd); 121 return (1); 122 } 123 124 #endif /* UNIXWARE_LONG_PASSWORDS */ 125 126 /* 127 NOTE: ia_get_logpwd() allocates memory for arg 2 128 functions that call shadow_pw() will need to free 129 */ 130 131 #ifdef USE_LIBIAF 132 char * 133 get_iaf_password(struct passwd *pw) 134 { 135 char *pw_password = NULL; 136 137 uinfo_t uinfo; 138 if (!ia_openinfo(pw->pw_name,&uinfo)) { 139 ia_get_logpwd(uinfo, &pw_password); 140 if (pw_password == NULL) 141 fatal("ia_get_logpwd: Unable to get the shadow passwd"); 142 ia_closeinfo(uinfo); 143 return pw_password; 144 } 145 else 146 fatal("ia_openinfo: Unable to open the shadow passwd file"); 147 } 148 #endif /* USE_LIBIAF */ 149 #endif /* HAVE_LIBIAF and not HAVE_SECUREWARE */ 150 151