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 "key.h" 42 #include "auth-options.h" 43 #include "log.h" 44 #include "misc.h" /* servconf.h needs misc.h for struct ForwardOptions */ 45 #include "servconf.h" 46 #include "hostfile.h" 47 #include "auth.h" 48 #include "ssh.h" 49 #include "ssh_api.h" 50 51 int nischeck(char *); 52 53 int 54 sys_auth_passwd(struct ssh *ssh, const char *password) 55 { 56 Authctxt *authctxt = ssh->authctxt; 57 struct passwd *pw = authctxt->pw; 58 char *salt; 59 int result; 60 61 /* Just use the supplied fake password if authctxt is invalid */ 62 char *pw_password = authctxt->valid ? shadow_pw(pw) : pw->pw_passwd; 63 64 /* Check for users with no password. */ 65 if (strcmp(pw_password, "") == 0 && strcmp(password, "") == 0) 66 return (1); 67 68 /* Encrypt the candidate password using the proper salt. */ 69 salt = (pw_password[0] && pw_password[1]) ? pw_password : "xx"; 70 71 /* 72 * Authentication is accepted if the encrypted passwords 73 * are identical. 74 */ 75 #ifdef UNIXWARE_LONG_PASSWORDS 76 if (!nischeck(pw->pw_name)) { 77 result = ((strcmp(bigcrypt(password, salt), pw_password) == 0) 78 || (strcmp(osr5bigcrypt(password, salt), pw_password) == 0)); 79 } 80 else 81 #endif /* UNIXWARE_LONG_PASSWORDS */ 82 result = (strcmp(xcrypt(password, salt), pw_password) == 0); 83 84 #ifdef USE_LIBIAF 85 if (authctxt->valid) 86 free(pw_password); 87 #endif 88 return(result); 89 } 90 91 #ifdef UNIXWARE_LONG_PASSWORDS 92 int 93 nischeck(char *namep) 94 { 95 char password_file[] = "/etc/passwd"; 96 FILE *fd; 97 struct passwd *ent = NULL; 98 99 if ((fd = fopen (password_file, "r")) == NULL) { 100 /* 101 * If the passwd file has disappeared we are in a bad state. 102 * However, returning 0 will send us back through the 103 * authentication scheme that has checked the ia database for 104 * passwords earlier. 105 */ 106 return(0); 107 } 108 109 /* 110 * fgetpwent() only reads from password file, so we know for certain 111 * that the user is local. 112 */ 113 while (ent = fgetpwent(fd)) { 114 if (strcmp (ent->pw_name, namep) == 0) { 115 /* Local user */ 116 fclose (fd); 117 return(0); 118 } 119 } 120 121 fclose (fd); 122 return (1); 123 } 124 125 #endif /* UNIXWARE_LONG_PASSWORDS */ 126 127 /* 128 NOTE: ia_get_logpwd() allocates memory for arg 2 129 functions that call shadow_pw() will need to free 130 */ 131 132 #ifdef USE_LIBIAF 133 char * 134 get_iaf_password(struct passwd *pw) 135 { 136 char *pw_password = NULL; 137 138 uinfo_t uinfo; 139 if (!ia_openinfo(pw->pw_name,&uinfo)) { 140 ia_get_logpwd(uinfo, &pw_password); 141 if (pw_password == NULL) 142 fatal("ia_get_logpwd: Unable to get the shadow passwd"); 143 ia_closeinfo(uinfo); 144 return pw_password; 145 } 146 else 147 fatal("ia_openinfo: Unable to open the shadow passwd file"); 148 } 149 #endif /* USE_LIBIAF */ 150 #endif /* HAVE_LIBIAF and not HAVE_SECUREWARE */ 151 152