1 /* 2 * Copyright (c) 2004 Kungliga Tekniska H�gskolan 3 * (Royal Institute of Technology, Stockholm, Sweden). 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * 3. Neither the name of the Institute nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #include "kadmin_locl.h" 35 #include "kadmin-commands.h" 36 37 RCSID("$Id: stash.c 22251 2007-12-09 05:58:43Z lha $"); 38 39 extern int local_flag; 40 41 int 42 stash(struct stash_options *opt, int argc, char **argv) 43 { 44 char buf[1024]; 45 krb5_error_code ret; 46 krb5_enctype enctype; 47 hdb_master_key mkey; 48 49 if(!local_flag) { 50 krb5_warnx(context, "stash is only available in local (-l) mode"); 51 return 0; 52 } 53 54 ret = krb5_string_to_enctype(context, opt->enctype_string, &enctype); 55 if(ret) { 56 krb5_warn(context, ret, "%s", opt->enctype_string); 57 return 0; 58 } 59 60 if(opt->key_file_string == NULL) { 61 asprintf(&opt->key_file_string, "%s/m-key", hdb_db_dir(context)); 62 if (opt->key_file_string == NULL) 63 errx(1, "out of memory"); 64 } 65 66 ret = hdb_read_master_key(context, opt->key_file_string, &mkey); 67 if(ret && ret != ENOENT) { 68 krb5_warn(context, ret, "reading master key from %s", 69 opt->key_file_string); 70 return 0; 71 } 72 73 if (opt->convert_file_flag) { 74 if (ret) 75 krb5_warn(context, ret, "reading master key from %s", 76 opt->key_file_string); 77 return 0; 78 } else { 79 krb5_keyblock key; 80 krb5_salt salt; 81 salt.salttype = KRB5_PW_SALT; 82 /* XXX better value? */ 83 salt.saltvalue.data = NULL; 84 salt.saltvalue.length = 0; 85 if(opt->master_key_fd_integer != -1) { 86 ssize_t n; 87 n = read(opt->master_key_fd_integer, buf, sizeof(buf)); 88 if(n == 0) 89 krb5_warnx(context, "end of file reading passphrase"); 90 else if(n < 0) 91 krb5_warn(context, errno, "reading passphrase"); 92 buf[n] = '\0'; 93 buf[strcspn(buf, "\r\n")] = '\0'; 94 } else { 95 if(UI_UTIL_read_pw_string(buf, sizeof(buf), "Master key: ", 1)) { 96 hdb_free_master_key(context, mkey); 97 return 0; 98 } 99 } 100 ret = krb5_string_to_key_salt(context, enctype, buf, salt, &key); 101 ret = hdb_add_master_key(context, &key, &mkey); 102 krb5_free_keyblock_contents(context, &key); 103 } 104 105 { 106 char *new, *old; 107 asprintf(&old, "%s.old", opt->key_file_string); 108 asprintf(&new, "%s.new", opt->key_file_string); 109 if(old == NULL || new == NULL) { 110 ret = ENOMEM; 111 goto out; 112 } 113 114 if(unlink(new) < 0 && errno != ENOENT) { 115 ret = errno; 116 goto out; 117 } 118 krb5_warnx(context, "writing key to \"%s\"", opt->key_file_string); 119 ret = hdb_write_master_key(context, new, mkey); 120 if(ret) 121 unlink(new); 122 else { 123 unlink(old); 124 if(link(opt->key_file_string, old) < 0 && errno != ENOENT) { 125 ret = errno; 126 unlink(new); 127 } else if(rename(new, opt->key_file_string) < 0) { 128 ret = errno; 129 } 130 } 131 out: 132 free(old); 133 free(new); 134 if(ret) 135 krb5_warn(context, errno, "writing master key file"); 136 } 137 138 hdb_free_master_key(context, mkey); 139 return 0; 140 } 141