add.c
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, (int)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->pw_file_string) { 97 FILE *f; 98 99 if (strcasecmp("STDIN", opt->pw_file_string) == 0) 100 f = stdin; 101 else 102 f = fopen(opt->pw_file_string, "r"); 103 if (f == NULL) 104 krb5_errx(context, 1, "Failed to open the password file %s", 105 opt->pw_file_string); 106 107 if (fgets(buf, sizeof(buf), f) == NULL) 108 krb5_errx(context, 1, 109 "Failed to read password from file %s", 110 opt->pw_file_string); 111 if (f != stdin) 112 fclose(f); 113 buf[strcspn(buf, "\n")] = '\0'; 114 115 opt->password_string = buf; 116 } 117 if(opt->password_string == NULL && opt->random_flag == 0) { 118 if(UI_UTIL_read_pw_string(buf, sizeof(buf), "Password: ", 1)) { 119 ret = 1; 120 goto out; 121 } 122 opt->password_string = buf; 123 } 124 if(opt->password_string) { 125 if (opt->hex_flag) { 126 size_t len; 127 void *data; 128 129 len = (strlen(opt->password_string) + 1) / 2; 130 131 data = malloc(len); 132 if (data == NULL) { 133 krb5_warn(context, ENOMEM, "malloc"); 134 goto out; 135 } 136 137 if ((size_t)hex_decode(opt->password_string, data, len) != len) { 138 free(data); 139 krb5_warn(context, ENOMEM, "hex decode failed"); 140 goto out; 141 } 142 143 ret = krb5_keyblock_init(context, enctype, 144 data, len, &entry.keyblock); 145 free(data); 146 } else if (!opt->salt_flag) { 147 krb5_salt salt; 148 krb5_data pw; 149 150 salt.salttype = KRB5_PW_SALT; 151 salt.saltvalue.data = NULL; 152 salt.saltvalue.length = 0; 153 pw.data = (void*)opt->password_string; 154 pw.length = strlen(opt->password_string); 155 ret = krb5_string_to_key_data_salt(context, enctype, pw, salt, 156 &entry.keyblock); 157 } else { 158 ret = krb5_string_to_key(context, enctype, opt->password_string, 159 entry.principal, &entry.keyblock); 160 } 161 memset (opt->password_string, 0, strlen(opt->password_string)); 162 } else { 163 ret = krb5_generate_random_keyblock(context, enctype, &entry.keyblock); 164 } 165 if(ret) { 166 krb5_warn(context, ret, "add"); 167 goto out; 168 } 169 entry.vno = opt->kvno_integer; 170 entry.timestamp = (uint32_t)time (NULL); 171 ret = krb5_kt_add_entry(context, keytab, &entry); 172 if(ret) 173 krb5_warn(context, ret, "add"); 174 out: 175 krb5_kt_free_entry(context, &entry); 176 krb5_kt_close(context, keytab); 177 return ret != 0; 178 }