1 /* 2 * Copyright (c) 1997-2005 Kungliga Tekniska Högskolan 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 "ktutil_locl.h" 35 36 RCSID("$Id$"); 37 38 static char * 39 readstring(const char *prompt, char *buf, size_t len) 40 { 41 printf("%s", prompt); 42 if (fgets(buf, len, stdin) == NULL) 43 return NULL; 44 buf[strcspn(buf, "\r\n")] = '\0'; 45 return buf; 46 } 47 48 int 49 kt_add(struct add_options *opt, int argc, char **argv) 50 { 51 krb5_error_code ret; 52 krb5_keytab keytab; 53 krb5_keytab_entry entry; 54 char buf[1024]; 55 krb5_enctype enctype; 56 57 if((keytab = ktutil_open_keytab()) == NULL) 58 return 1; 59 60 memset(&entry, 0, sizeof(entry)); 61 if(opt->principal_string == NULL) { 62 if(readstring("Principal: ", buf, sizeof(buf)) == NULL) 63 return 1; 64 opt->principal_string = buf; 65 } 66 ret = krb5_parse_name(context, opt->principal_string, &entry.principal); 67 if(ret) { 68 krb5_warn(context, ret, "%s", opt->principal_string); 69 goto out; 70 } 71 if(opt->enctype_string == NULL) { 72 if(readstring("Encryption type: ", buf, sizeof(buf)) == NULL) { 73 ret = 1; 74 goto out; 75 } 76 opt->enctype_string = buf; 77 } 78 ret = krb5_string_to_enctype(context, opt->enctype_string, &enctype); 79 if(ret) { 80 int t; 81 if(sscanf(opt->enctype_string, "%d", &t) == 1) 82 enctype = t; 83 else { 84 krb5_warn(context, ret, "%s", opt->enctype_string); 85 goto out; 86 } 87 } 88 if(opt->kvno_integer == -1) { 89 if(readstring("Key version: ", buf, sizeof(buf)) == NULL) { 90 ret = 1; 91 goto out; 92 } 93 if(sscanf(buf, "%u", &opt->kvno_integer) != 1) 94 goto out; 95 } 96 if(opt->password_string == NULL && opt->random_flag == 0) { 97 if(UI_UTIL_read_pw_string(buf, sizeof(buf), "Password: ", 1)) { 98 ret = 1; 99 goto out; 100 } 101 opt->password_string = buf; 102 } 103 if(opt->password_string) { 104 if (opt->hex_flag) { 105 size_t len; 106 void *data; 107 108 len = (strlen(opt->password_string) + 1) / 2; 109 110 data = malloc(len); 111 if (data == NULL) { 112 krb5_warn(context, ENOMEM, "malloc"); 113 goto out; 114 } 115 116 if ((size_t)hex_decode(opt->password_string, data, len) != len) { 117 free(data); 118 krb5_warn(context, ENOMEM, "hex decode failed"); 119 goto out; 120 } 121 122 ret = krb5_keyblock_init(context, enctype, 123 data, len, &entry.keyblock); 124 free(data); 125 } else if (!opt->salt_flag) { 126 krb5_salt salt; 127 krb5_data pw; 128 129 salt.salttype = KRB5_PW_SALT; 130 salt.saltvalue.data = NULL; 131 salt.saltvalue.length = 0; 132 pw.data = (void*)opt->password_string; 133 pw.length = strlen(opt->password_string); 134 ret = krb5_string_to_key_data_salt(context, enctype, pw, salt, 135 &entry.keyblock); 136 } else { 137 ret = krb5_string_to_key(context, enctype, opt->password_string, 138 entry.principal, &entry.keyblock); 139 } 140 memset (opt->password_string, 0, strlen(opt->password_string)); 141 } else { 142 ret = krb5_generate_random_keyblock(context, enctype, &entry.keyblock); 143 } 144 if(ret) { 145 krb5_warn(context, ret, "add"); 146 goto out; 147 } 148 entry.vno = opt->kvno_integer; 149 entry.timestamp = time (NULL); 150 ret = krb5_kt_add_entry(context, keytab, &entry); 151 if(ret) 152 krb5_warn(context, ret, "add"); 153 out: 154 krb5_kt_free_entry(context, &entry); 155 krb5_kt_close(context, keytab); 156 return ret != 0; 157 } 158