1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #pragma ident "%Z%%M% %I% %E% SMI" 27 28 #include <sys/types.h> 29 #include <sys/varargs.h> 30 #include <string.h> 31 #include <syslog.h> 32 #include <stdlib.h> 33 34 #include <security/pam_appl.h> 35 #include <security/pam_modules.h> 36 #include <security/pam_impl.h> 37 38 #include <libintl.h> 39 #include <passwdutil.h> 40 41 #include <smbsrv/libsmb.h> 42 43 /*PRINTFLIKE3*/ 44 static void 45 error(boolean_t nowarn, pam_handle_t *pamh, char *fmt, ...) 46 { 47 va_list ap; 48 char message[PAM_MAX_MSG_SIZE]; 49 50 if (nowarn) 51 return; 52 53 va_start(ap, fmt); 54 (void) vsnprintf(message, sizeof (message), fmt, ap); 55 (void) __pam_display_msg(pamh, PAM_ERROR_MSG, 1, &message, 56 NULL); 57 va_end(ap); 58 } 59 60 /*PRINTFLIKE3*/ 61 static void 62 info(boolean_t nowarn, pam_handle_t *pamh, char *fmt, ...) 63 { 64 va_list ap; 65 char message[PAM_MAX_MSG_SIZE]; 66 67 if (nowarn) 68 return; 69 70 va_start(ap, fmt); 71 (void) vsnprintf(message, sizeof (message), fmt, ap); 72 (void) __pam_display_msg(pamh, PAM_TEXT_INFO, 1, &message, 73 NULL); 74 va_end(ap); 75 } 76 77 int 78 pam_sm_chauthtok(pam_handle_t *pamh, int flags, int argc, const char **argv) 79 { 80 boolean_t debug = B_FALSE; 81 boolean_t nowarn = B_FALSE; 82 pwu_repository_t files_rep; 83 char *user, *local_user; 84 char *newpw; 85 char *service; 86 int privileged; 87 int res; 88 int i; 89 90 for (i = 0; i < argc; i++) { 91 if (strcmp(argv[i], "debug") == 0) 92 debug = B_TRUE; 93 else if (strcmp(argv[i], "nowarn") == 0) 94 nowarn = B_TRUE; 95 } 96 97 if ((flags & PAM_PRELIM_CHECK) != 0) 98 return (PAM_IGNORE); 99 100 if ((flags & PAM_UPDATE_AUTHTOK) == 0) 101 return (PAM_SYSTEM_ERR); 102 103 if ((flags & PAM_SILENT) != 0) 104 nowarn = B_TRUE; 105 106 if (debug) 107 __pam_log(LOG_AUTH | LOG_DEBUG, 108 "pam_smb_passwd: storing authtok"); 109 110 (void) pam_get_item(pamh, PAM_SERVICE, (void **)&service); 111 (void) pam_get_item(pamh, PAM_USER, (void **)&user); 112 113 if (user == NULL || *user == '\0') { 114 __pam_log(LOG_AUTH | LOG_ERR, 115 "pam_smb_passwd: username is empty"); 116 return (PAM_USER_UNKNOWN); 117 } 118 119 (void) pam_get_item(pamh, PAM_AUTHTOK, (void **)&newpw); 120 if (newpw == NULL) { 121 /* 122 * A module on the stack has removed PAM_AUTHTOK. We fail 123 */ 124 return (PAM_AUTHTOK_ERR); 125 } 126 127 /* Check to see if this is a local user */ 128 files_rep.type = "files"; 129 files_rep.scope = NULL; 130 files_rep.scope_len = 0; 131 res = __user_to_authenticate(user, &files_rep, &local_user, 132 &privileged); 133 if (res != PWU_SUCCESS) { 134 switch (res) { 135 case PWU_NOT_FOUND: 136 /* if not a local user, ignore */ 137 if (debug) { 138 __pam_log(LOG_AUTH | LOG_DEBUG, 139 "pam_smb_passwd: %s is not local", user); 140 } 141 return (PAM_IGNORE); 142 case PWU_DENIED: 143 return (PAM_PERM_DENIED); 144 } 145 return (PAM_SYSTEM_ERR); 146 } 147 148 smb_pwd_init(B_FALSE); 149 150 res = smb_pwd_setpasswd(user, newpw); 151 152 smb_pwd_fini(); 153 154 /* 155 * now map the various return states to user messages 156 * and PAM return codes. 157 */ 158 switch (res) { 159 case SMB_PWE_SUCCESS: 160 info(nowarn, pamh, dgettext(TEXT_DOMAIN, 161 "%s: SMB password successfully changed for %s"), 162 service, user); 163 return (PAM_SUCCESS); 164 165 case SMB_PWE_STAT_FAILED: 166 __pam_log(LOG_AUTH | LOG_ERR, 167 "%s: stat of SMB password file failed", service); 168 return (PAM_SYSTEM_ERR); 169 170 case SMB_PWE_OPEN_FAILED: 171 case SMB_PWE_WRITE_FAILED: 172 case SMB_PWE_CLOSE_FAILED: 173 case SMB_PWE_UPDATE_FAILED: 174 error(nowarn, pamh, dgettext(TEXT_DOMAIN, 175 "%s: Unexpected failure. SMB password database unchanged."), 176 service); 177 return (PAM_SYSTEM_ERR); 178 179 case SMB_PWE_BUSY: 180 error(nowarn, pamh, dgettext(TEXT_DOMAIN, 181 "%s: SMB password database busy. Try again later."), 182 service); 183 184 return (PAM_AUTHTOK_LOCK_BUSY); 185 186 case SMB_PWE_USER_UNKNOWN: 187 error(nowarn, pamh, dgettext(TEXT_DOMAIN, 188 "%s: %s does not exist."), service, user); 189 return (PAM_USER_UNKNOWN); 190 191 case SMB_PWE_USER_DISABLE: 192 error(nowarn, pamh, dgettext(TEXT_DOMAIN, 193 "%s: %s is disable. SMB password database unchanged."), 194 service, user); 195 return (PAM_IGNORE); 196 197 case SMB_PWE_DENIED: 198 return (PAM_PERM_DENIED); 199 200 default: 201 res = PAM_SYSTEM_ERR; 202 break; 203 } 204 205 return (res); 206 } 207