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 /* 23 * Copyright 2009 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 /* 27 * Copyright 1990 by the Massachusetts Institute of Technology. 28 * All Rights Reserved. 29 * 30 * Export of this software from the United States of America may 31 * require a specific license from the United States Government. 32 * It is the responsibility of any person or organization contemplating 33 * export to obtain such a license before exporting. 34 * 35 * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and 36 * distribute this software and its documentation for any purpose and 37 * without fee is hereby granted, provided that the above copyright 38 * notice appear in all copies and that both that copyright notice and 39 * this permission notice appear in supporting documentation, and that 40 * the name of M.I.T. not be used in advertising or publicity pertaining 41 * to distribution of the software without specific, written prior 42 * permission. Furthermore if you modify this software you must label 43 * your software as modified software and not distribute it in such a 44 * fashion that it might be confused with the original M.I.T. software. 45 * M.I.T. makes no representations about the suitability of 46 * this software for any purpose. It is provided "as is" without express 47 * or implied warranty. 48 * 49 * 50 * Initialize a credentials cache. 51 */ 52 #include <kerberosv5/krb5.h> 53 #include <kerberosv5/com_err.h> 54 #include <assert.h> 55 #include <stdio.h> 56 #include <syslog.h> 57 #include <errno.h> 58 59 #include <smbsrv/libsmbns.h> 60 #include <smbns_krb.h> 61 62 int 63 smb_kinit(char *principal_name, char *principal_passwd) 64 { 65 krb5_context ctx = NULL; 66 krb5_ccache cc = NULL; 67 krb5_principal me = NULL; 68 krb5_creds my_creds; 69 krb5_error_code code; 70 const char *errmsg = NULL; 71 const char *doing = NULL; 72 73 assert(principal_name != NULL); 74 assert(principal_passwd != NULL); 75 76 (void) memset(&my_creds, 0, sizeof (my_creds)); 77 78 /* 79 * From this point on, we can goto cleanup because the key variables 80 * are initialized. 81 */ 82 83 code = krb5_init_context(&ctx); 84 if (code) { 85 doing = "initializing context"; 86 goto cleanup; 87 } 88 89 code = krb5_cc_default(ctx, &cc); 90 if (code != 0) { 91 doing = "resolve default credentials cache"; 92 goto cleanup; 93 } 94 95 /* Use specified name */ 96 code = krb5_parse_name(ctx, principal_name, &me); 97 if (code != 0) { 98 doing = "parsing principal name"; 99 goto cleanup; 100 } 101 102 code = krb5_get_init_creds_password(ctx, &my_creds, me, 103 principal_passwd, NULL, 0, (krb5_deltat)0, 104 NULL, NULL); 105 if (code != 0) { 106 doing = "getting initial credentials"; 107 108 if (code == KRB5KRB_AP_ERR_BAD_INTEGRITY) { 109 errmsg = "Password incorrect"; 110 } 111 112 goto cleanup; 113 } 114 115 code = krb5_cc_initialize(ctx, cc, me); 116 if (code != 0) { 117 doing = "initializing cache"; 118 goto cleanup; 119 } 120 121 code = krb5_cc_store_cred(ctx, cc, &my_creds); 122 if (code != 0) { 123 doing = "storing credentials"; 124 goto cleanup; 125 } 126 127 /* SUCCESS! */ 128 129 cleanup: 130 if (code != 0) { 131 if (errmsg == NULL) 132 errmsg = error_message(code); 133 syslog(LOG_ERR, "k5_kinit: %s (%s)", doing, errmsg); 134 } 135 136 if (my_creds.client == me) { 137 my_creds.client = NULL; 138 } 139 krb5_free_cred_contents(ctx, &my_creds); 140 141 if (me) 142 krb5_free_principal(ctx, me); 143 if (cc) 144 (void) krb5_cc_close(ctx, cc); 145 if (ctx) 146 krb5_free_context(ctx); 147 148 return (code == 0); 149 } 150 151 /* 152 * smb_ccache_init 153 * 154 * Creates the directory where the Kerberos ccache file is located 155 * and set KRB5CCNAME in the environment. 156 * 157 * Returns 0 upon succcess. Otherwise, returns 158 * -1 if it fails to create the specified directory fails. 159 * -2 if it fails to set the KRB5CCNAME environment variable. 160 */ 161 int 162 smb_ccache_init(char *dir, char *filename) 163 { 164 static char buf[MAXPATHLEN]; 165 166 if ((mkdir(dir, 0700) < 0) && (errno != EEXIST)) 167 return (-1); 168 169 (void) snprintf(buf, MAXPATHLEN, "KRB5CCNAME=%s/%s", dir, filename); 170 if (putenv(buf) != 0) 171 return (-2); 172 return (0); 173 } 174 175 void 176 smb_ccache_remove(char *path) 177 { 178 if ((remove(path) < 0) && (errno != ENOENT)) 179 syslog(LOG_ERR, "failed to remove ccache (%s)", path); 180 } 181