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 (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved. 24 */ 25 /* 26 * Copyright 1990 by the Massachusetts Institute of Technology. 27 * All Rights Reserved. 28 * 29 * Export of this software from the United States of America may 30 * require a specific license from the United States Government. 31 * It is the responsibility of any person or organization contemplating 32 * export to obtain such a license before exporting. 33 * 34 * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and 35 * distribute this software and its documentation for any purpose and 36 * without fee is hereby granted, provided that the above copyright 37 * notice appear in all copies and that both that copyright notice and 38 * this permission notice appear in supporting documentation, and that 39 * the name of M.I.T. not be used in advertising or publicity pertaining 40 * to distribution of the software without specific, written prior 41 * permission. Furthermore if you modify this software you must label 42 * your software as modified software and not distribute it in such a 43 * fashion that it might be confused with the original M.I.T. software. 44 * M.I.T. makes no representations about the suitability of 45 * this software for any purpose. It is provided "as is" without express 46 * or implied warranty. 47 * 48 * 49 * Initialize a credentials cache. 50 */ 51 #include <kerberosv5/krb5.h> 52 #include <kerberosv5/com_err.h> 53 #include <assert.h> 54 #include <stdio.h> 55 #include <syslog.h> 56 #include <errno.h> 57 58 #include <smbsrv/libsmbns.h> 59 #include <smbns_krb.h> 60 61 int 62 smb_kinit(char *principal_name, char *principal_passwd) 63 { 64 krb5_context ctx = NULL; 65 krb5_ccache cc = NULL; 66 krb5_principal me = NULL; 67 krb5_creds my_creds; 68 krb5_error_code code; 69 const char *errmsg = NULL; 70 const char *doing = NULL; 71 72 assert(principal_name != NULL); 73 assert(principal_passwd != NULL); 74 75 (void) memset(&my_creds, 0, sizeof (my_creds)); 76 77 /* 78 * From this point on, we can goto cleanup because the key variables 79 * are initialized. 80 */ 81 82 code = krb5_init_context(&ctx); 83 if (code) { 84 doing = "smbns_krb: initializing context"; 85 goto cleanup; 86 } 87 88 code = krb5_cc_default(ctx, &cc); 89 if (code != 0) { 90 doing = "smbns_krb: resolve default credentials cache"; 91 goto cleanup; 92 } 93 94 /* Use specified name */ 95 code = krb5_parse_name(ctx, principal_name, &me); 96 if (code != 0) { 97 doing = "smbns_krb: parsing principal name"; 98 goto cleanup; 99 } 100 101 code = krb5_get_init_creds_password(ctx, &my_creds, me, 102 principal_passwd, NULL, 0, (krb5_deltat)0, 103 NULL, NULL); 104 if (code != 0) { 105 doing = "smbns_krb: getting initial credentials"; 106 107 if (code == KRB5KRB_AP_ERR_BAD_INTEGRITY) { 108 errmsg = "smbns_krb: Password incorrect"; 109 } 110 111 goto cleanup; 112 } 113 114 code = krb5_cc_initialize(ctx, cc, me); 115 if (code != 0) { 116 doing = "smbns_krb: initializing cache"; 117 goto cleanup; 118 } 119 120 code = krb5_cc_store_cred(ctx, cc, &my_creds); 121 if (code != 0) { 122 doing = "smbns_krb: storing credentials"; 123 goto cleanup; 124 } 125 126 /* SUCCESS! */ 127 128 cleanup: 129 if (code != 0) { 130 if (errmsg == NULL) 131 smb_krb5_log_errmsg(ctx, doing, code); 132 else 133 syslog(LOG_ERR, "%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 * Invoke krb5_get_error_message() to generate a richer error message. 153 */ 154 void 155 smb_krb5_log_errmsg(krb5_context ctx, const char *prefix, krb5_error_code code) 156 { 157 const char *msg; 158 159 msg = krb5_get_error_message(ctx, code); 160 syslog(LOG_ERR, "%s (%s)", prefix, msg); 161 krb5_free_error_message(ctx, msg); 162 } 163 164 /* 165 * smb_ccache_init 166 * 167 * Creates the directory where the Kerberos ccache file is located 168 * and set KRB5CCNAME in the environment. 169 * 170 * Returns 0 upon succcess. Otherwise, returns 171 * -1 if it fails to create the specified directory fails. 172 * -2 if it fails to set the KRB5CCNAME environment variable. 173 */ 174 int 175 smb_ccache_init(char *dir, char *filename) 176 { 177 static char buf[MAXPATHLEN]; 178 179 if ((mkdir(dir, 0700) < 0) && (errno != EEXIST)) 180 return (-1); 181 182 (void) snprintf(buf, MAXPATHLEN, "KRB5CCNAME=%s/%s", dir, filename); 183 if (putenv(buf) != 0) 184 return (-2); 185 return (0); 186 } 187 188 void 189 smb_ccache_remove(char *path) 190 { 191 if ((remove(path) < 0) && (errno != ENOENT)) 192 syslog(LOG_ERR, "smbns_krb: failed to remove ccache (%s)", 193 path); 194 } 195