add.c revision 1.2
1/* $NetBSD: add.c,v 1.2 2017/01/28 21:31:44 christos Exp $ */ 2 3/* 4 * Copyright (c) 1997-2005 Kungliga Tekniska H��gskolan 5 * (Royal Institute of Technology, Stockholm, Sweden). 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * 3. Neither the name of the Institute nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36#include "ktutil_locl.h" 37 38__RCSID("$NetBSD: add.c,v 1.2 2017/01/28 21:31:44 christos Exp $"); 39 40static char * 41readstring(const char *prompt, char *buf, size_t len) 42{ 43 printf("%s", prompt); 44 if (fgets(buf, len, stdin) == NULL) 45 return NULL; 46 buf[strcspn(buf, "\r\n")] = '\0'; 47 return buf; 48} 49 50int 51kt_add(struct add_options *opt, int argc, char **argv) 52{ 53 krb5_error_code ret; 54 krb5_keytab keytab; 55 krb5_keytab_entry entry; 56 char buf[1024]; 57 krb5_enctype enctype; 58 59 if((keytab = ktutil_open_keytab()) == NULL) 60 return 1; 61 62 memset(&entry, 0, sizeof(entry)); 63 if(opt->principal_string == NULL) { 64 if(readstring("Principal: ", buf, sizeof(buf)) == NULL) 65 return 1; 66 opt->principal_string = buf; 67 } 68 ret = krb5_parse_name(context, opt->principal_string, &entry.principal); 69 if(ret) { 70 krb5_warn(context, ret, "%s", opt->principal_string); 71 goto out; 72 } 73 if(opt->enctype_string == NULL) { 74 if(readstring("Encryption type: ", buf, sizeof(buf)) == NULL) { 75 ret = 1; 76 goto out; 77 } 78 opt->enctype_string = buf; 79 } 80 ret = krb5_string_to_enctype(context, opt->enctype_string, &enctype); 81 if(ret) { 82 int t; 83 if(sscanf(opt->enctype_string, "%d", &t) == 1) 84 enctype = t; 85 else { 86 krb5_warn(context, ret, "%s", opt->enctype_string); 87 goto out; 88 } 89 } 90 if(opt->kvno_integer == -1) { 91 if(readstring("Key version: ", buf, sizeof(buf)) == NULL) { 92 ret = 1; 93 goto out; 94 } 95 if(sscanf(buf, "%u", &opt->kvno_integer) != 1) 96 goto out; 97 } 98 if(opt->password_string == NULL && opt->random_flag == 0) { 99 if(UI_UTIL_read_pw_string(buf, sizeof(buf), "Password: ", 1)) { 100 ret = 1; 101 goto out; 102 } 103 opt->password_string = buf; 104 } 105 if(opt->password_string) { 106 if (opt->hex_flag) { 107 size_t len; 108 void *data; 109 110 len = (strlen(opt->password_string) + 1) / 2; 111 112 data = malloc(len); 113 if (data == NULL) { 114 krb5_warn(context, ENOMEM, "malloc"); 115 goto out; 116 } 117 118 if ((size_t)hex_decode(opt->password_string, data, len) != len) { 119 free(data); 120 krb5_warn(context, ENOMEM, "hex decode failed"); 121 goto out; 122 } 123 124 ret = krb5_keyblock_init(context, enctype, 125 data, len, &entry.keyblock); 126 free(data); 127 } else if (!opt->salt_flag) { 128 krb5_salt salt; 129 krb5_data pw; 130 131 salt.salttype = KRB5_PW_SALT; 132 salt.saltvalue.data = NULL; 133 salt.saltvalue.length = 0; 134 pw.data = (void*)opt->password_string; 135 pw.length = strlen(opt->password_string); 136 ret = krb5_string_to_key_data_salt(context, enctype, pw, salt, 137 &entry.keyblock); 138 } else { 139 ret = krb5_string_to_key(context, enctype, opt->password_string, 140 entry.principal, &entry.keyblock); 141 } 142 memset (opt->password_string, 0, strlen(opt->password_string)); 143 } else { 144 ret = krb5_generate_random_keyblock(context, enctype, &entry.keyblock); 145 } 146 if(ret) { 147 krb5_warn(context, ret, "add"); 148 goto out; 149 } 150 entry.vno = opt->kvno_integer; 151 entry.timestamp = time (NULL); 152 ret = krb5_kt_add_entry(context, keytab, &entry); 153 if(ret) 154 krb5_warn(context, ret, "add"); 155 out: 156 krb5_kt_free_entry(context, &entry); 157 krb5_kt_close(context, keytab); 158 return ret != 0; 159} 160