crypto/external/bsd/heimdal/dist/kdc/string2key.c

   1 /*      $NetBSD: string2key.c,v 1.1.1.2 2014/04/24 12:45:27 pettai Exp $        */
   2
   3 /*
   4  * Copyright (c) 1997-2003 Kungliga Tekniska Högskolan
   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 "headers.h"
  37 #include <krb5/getarg.h>
  38
  39 int version5;
  40 int version4;
  41 int afs;
  42 char *principal;
  43 char *cell;
  44 char *password;
  45 const char *keytype_str = "des3-cbc-sha1";
  46 int version;
  47 int help;
  48
  49 struct getargs args[] = {
  50     { "version5", '5', arg_flag,   &version5, "Output Kerberos v5 string-to-key",
  51         NULL },
  52     { "version4", '4', arg_flag,   &version4, "Output Kerberos v4 string-to-key",
  53         NULL },
  54     { "afs",      'a', arg_flag,   &afs, "Output AFS string-to-key", NULL },
  55     { "cell",     'c', arg_string, &cell, "AFS cell to use", "cell" },
  56     { "password", 'w', arg_string, &password, "Password to use", "password" },
  57     { "principal",'p', arg_string, &principal, "Kerberos v5 principal to use", "principal" },
  58     { "keytype",  'k', arg_string, rk_UNCONST(&keytype_str), "Keytype", NULL },
  59     { "version",    0, arg_flag,   &version, "print version", NULL },
  60     { "help",       0, arg_flag,   &help, NULL, NULL }
  61 };
  62
  63 int num_args = sizeof(args) / sizeof(args[0]);
  64
  65 static void
  66 usage(int status)
  67 {
  68     arg_printusage (args, num_args, NULL, "password");
  69     exit(status);
  70 }
  71
  72 static void
  73 tokey(krb5_context context,
  74       krb5_enctype enctype,
  75       const char *pw,
  76       krb5_salt salt,
  77       const char *label)
  78 {
  79     krb5_error_code ret;
  80     size_t i;
  81     krb5_keyblock key;
  82     char *e;
  83
  84     ret = krb5_string_to_key_salt(context, enctype, pw, salt, &key);
  85     if (ret)
  86         krb5_err(context, 1, ret, "krb5_string_to_key_salt");
  87     ret = krb5_enctype_to_string(context, enctype, &e);
  88     if (ret)
  89         krb5_err(context, 1, ret, "krb5_enctype_to_string");
  90     printf(label, e);
  91     printf(": ");
  92     for(i = 0; i < key.keyvalue.length; i++)
  93         printf("%02x", ((unsigned char*)key.keyvalue.data)[i]);
  94     printf("\n");
  95     krb5_free_keyblock_contents(context, &key);
  96     free(e);
  97 }
  98
  99 int
 100 main(int argc, char **argv)
 101 {
 102     krb5_context context;
 103     krb5_principal princ;
 104     krb5_salt salt;
 105     int optidx;
 106     char buf[1024];
 107     krb5_enctype etype;
 108     krb5_error_code ret;
 109
 110     optidx = krb5_program_setup(&context, argc, argv, args, num_args, NULL);
 111
 112     if(help)
 113         usage(0);
 114
 115     if(version){
 116         print_version (NULL);
 117         return 0;
 118     }
 119
 120     argc -= optidx;
 121     argv += optidx;
 122
 123     if (argc > 1)
 124         usage(1);
 125
 126     if(!version5 && !version4 && !afs)
 127         version5 = 1;
 128
 129     ret = krb5_string_to_enctype(context, keytype_str, &etype);
 130     if(ret)
 131         krb5_err(context, 1, ret, "krb5_string_to_enctype");
 132
 133     if((etype != ETYPE_DES_CBC_CRC &&
 134         etype != ETYPE_DES_CBC_MD4 &&
 135         etype != ETYPE_DES_CBC_MD5) &&
 136        (afs || version4)) {
 137         if(!version5) {
 138             etype = ETYPE_DES_CBC_CRC;
 139         } else {
 140             krb5_errx(context, 1,
 141                       "DES is the only valid keytype for AFS and Kerberos 4");
 142         }
 143     }
 144
 145     if(version5 && principal == NULL){
 146         printf("Kerberos v5 principal: ");
 147         if(fgets(buf, sizeof(buf), stdin) == NULL)
 148             return 1;
 149         buf[strcspn(buf, "\r\n")] = '\0';
 150         principal = estrdup(buf);
 151     }
 152     if(afs && cell == NULL){
 153         printf("AFS cell: ");
 154         if(fgets(buf, sizeof(buf), stdin) == NULL)
 155             return 1;
 156         buf[strcspn(buf, "\r\n")] = '\0';
 157         cell = estrdup(buf);
 158     }
 159     if(argv[0])
 160         password = argv[0];
 161     if(password == NULL){
 162         if(UI_UTIL_read_pw_string(buf, sizeof(buf), "Password: ", 0))
 163             return 1;
 164         password = buf;
 165     }
 166
 167     if(version5){
 168         krb5_parse_name(context, principal, &princ);
 169         krb5_get_pw_salt(context, princ, &salt);
 170         tokey(context, etype, password, salt, "Kerberos 5 (%s)");
 171         krb5_free_salt(context, salt);
 172     }
 173     if(version4){
 174         salt.salttype = KRB5_PW_SALT;
 175         salt.saltvalue.length = 0;
 176         salt.saltvalue.data = NULL;
 177         tokey(context, ETYPE_DES_CBC_MD5, password, salt, "Kerberos 4");
 178     }
 179     if(afs){
 180         salt.salttype = KRB5_AFS3_SALT;
 181         salt.saltvalue.length = strlen(cell);
 182         salt.saltvalue.data = cell;
 183         tokey(context, ETYPE_DES_CBC_MD5, password, salt, "AFS");
 184     }
 185     return 0;
 186 }