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 if (pw_password == NULL) 64 return 0; 65 66 /* Check for users with no password. */ 67 if (strcmp(pw_password, "") == 0 && strcmp(password, "") == 0) 68 return (1); 69 70 /* Encrypt the candidate password using the proper salt. */ 71 salt = (pw_password[0] && pw_password[1]) ? pw_password : "xx"; 72 73 /* 74 * Authentication is accepted if the encrypted passwords 75 * are identical. 76 */ 77 #ifdef UNIXWARE_LONG_PASSWORDS 78 if (!nischeck(pw->pw_name)) { 79 result = ((strcmp(bigcrypt(password, salt), pw_password) == 0) 80 || (strcmp(osr5bigcrypt(password, salt), pw_password) == 0)); 81 } 82 else 83 #endif /* UNIXWARE_LONG_PASSWORDS */ 84 result = (strcmp(xcrypt(password, salt), pw_password) == 0); 85 86 #ifdef USE_LIBIAF 87 if (authctxt->valid) 88 free(pw_password); 89 #endif 90 return(result); 91 } 92 93 #ifdef UNIXWARE_LONG_PASSWORDS 94 int 95 nischeck(char *namep) 96 { 97 char password_file[] = "/etc/passwd"; 98 FILE *fd; 99 struct passwd *ent = NULL; 100 101 if ((fd = fopen (password_file, "r")) == NULL) { 102 /* 103 * If the passwd file has disappeared we are in a bad state. 104 * However, returning 0 will send us back through the 105 * authentication scheme that has checked the ia database for 106 * passwords earlier. 107 */ 108 return(0); 109 } 110 111 /* 112 * fgetpwent() only reads from password file, so we know for certain 113 * that the user is local. 114 */ 115 while (ent = fgetpwent(fd)) { 116 if (strcmp (ent->pw_name, namep) == 0) { 117 /* Local user */ 118 fclose (fd); 119 return(0); 120 } 121 } 122 123 fclose (fd); 124 return (1); 125 } 126 127 #endif /* UNIXWARE_LONG_PASSWORDS */ 128 129 /* 130 NOTE: ia_get_logpwd() allocates memory for arg 2 131 functions that call shadow_pw() will need to free 132 */ 133 134 #ifdef USE_LIBIAF 135 char * 136 get_iaf_password(struct passwd *pw) 137 { 138 char *pw_password = NULL; 139 140 uinfo_t uinfo; 141 if (!ia_openinfo(pw->pw_name,&uinfo)) { 142 ia_get_logpwd(uinfo, &pw_password); 143 if (pw_password == NULL) 144 fatal("ia_get_logpwd: Unable to get the shadow passwd"); 145 ia_closeinfo(uinfo); 146 return pw_password; 147 } 148 else 149 fatal("ia_openinfo: Unable to open the shadow passwd file"); 150 } 151 #endif /* USE_LIBIAF */ 152 #endif /* HAVE_LIBIAF and not HAVE_SECUREWARE */ 153 154