crypto/heimdal-0.6.3/kdc/string2key.c

   1 /*
   2  * Copyright (c) 1997-2003 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 "headers.h"
  35 #include <getarg.h>
  36
  37 RCSID("$Id: string2key.c,v 1.20 2003/03/25 12:28:52 joda Exp $");
  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     { "version4", '4', arg_flag,   &version4, "Output Kerberos v4 string-to-key" },
  52     { "afs",      'a', arg_flag,   &afs, "Output AFS string-to-key" },
  53     { "cell",     'c', arg_string, &cell, "AFS cell to use", "cell" },
  54     { "password", 'w', arg_string, &password, "Password to use", "password" },
  55     { "principal",'p', arg_string, &principal, "Kerberos v5 principal to use", "principal" },
  56     { "keytype",  'k', arg_string, &keytype_str, "Keytype" },
  57     { "version",    0, arg_flag,   &version, "print version" },
  58     { "help",       0, arg_flag,   &help, NULL }
  59 };
  60
  61 int num_args = sizeof(args) / sizeof(args[0]);
  62
  63 static void
  64 usage(int status)
  65 {
  66     arg_printusage (args, num_args, NULL, "password");
  67     exit(status);
  68 }
  69
  70 static void
  71 tokey(krb5_context context,
  72       krb5_enctype enctype,
  73       const char *password,
  74       krb5_salt salt,
  75       const char *label)
  76 {
  77     int i;
  78     krb5_keyblock key;
  79     char *e;
  80     krb5_string_to_key_salt(context, enctype, password, salt, &key);
  81     krb5_enctype_to_string(context, enctype, &e);
  82     printf(label, e);
  83     printf(": ");
  84     for(i = 0; i < key.keyvalue.length; i++)
  85         printf("%02x", ((unsigned char*)key.keyvalue.data)[i]);
  86     printf("\n");
  87     krb5_free_keyblock_contents(context, &key);
  88 }
  89
  90 int
  91 main(int argc, char **argv)
  92 {
  93     krb5_context context;
  94     krb5_principal princ;
  95     krb5_salt salt;
  96     int optind;
  97     char buf[1024];
  98     krb5_enctype etype;
  99     krb5_error_code ret;
 100
 101     optind = krb5_program_setup(&context, argc, argv, args, num_args, NULL);
 102
 103     if(help)
 104         usage(0);
 105
 106     if(version){
 107         print_version (NULL);
 108         return 0;
 109     }
 110
 111     argc -= optind;
 112     argv += optind;
 113
 114     if (argc > 1)
 115         usage(1);
 116
 117     if(!version5 && !version4 && !afs)
 118         version5 = 1;
 119
 120     ret = krb5_string_to_enctype(context, keytype_str, &etype);
 121     if(ret) {
 122         krb5_keytype keytype;
 123         int *etypes;
 124         unsigned num;
 125         ret = krb5_string_to_keytype(context, keytype_str, &keytype);
 126         if(ret)
 127             krb5_err(context, 1, ret, "%s", keytype_str);
 128         ret = krb5_keytype_to_enctypes(context, keytype, &num, &etypes);
 129         if(ret)
 130             krb5_err(context, 1, ret, "%s", keytype_str);
 131         if(num == 0)
 132             krb5_errx(context, 1, "there are no encryption types for that keytype");
 133         etype = etypes[0];
 134         krb5_enctype_to_string(context, etype, &keytype_str);
 135         if(num > 1 && version5)
 136             krb5_warnx(context, "ambiguous keytype, using %s", keytype_str);
 137     }
 138
 139     if((etype != ETYPE_DES_CBC_CRC &&
 140         etype != ETYPE_DES_CBC_MD4 &&
 141         etype != ETYPE_DES_CBC_MD5) &&
 142        (afs || version4)) {
 143         if(!version5) {
 144             etype = ETYPE_DES_CBC_CRC;
 145         } else {
 146             krb5_errx(context, 1,
 147                       "DES is the only valid keytype for AFS and Kerberos 4");
 148         }
 149     }
 150
 151     if(version5 && principal == NULL){
 152         printf("Kerberos v5 principal: ");
 153         if(fgets(buf, sizeof(buf), stdin) == NULL)
 154             return 1;
 155         if(buf[strlen(buf) - 1] == '\n')
 156             buf[strlen(buf) - 1] = '\0';
 157         principal = estrdup(buf);
 158     }
 159     if(afs && cell == NULL){
 160         printf("AFS cell: ");
 161         if(fgets(buf, sizeof(buf), stdin) == NULL)
 162             return 1;
 163         if(buf[strlen(buf) - 1] == '\n')
 164             buf[strlen(buf) - 1] = '\0';
 165         cell = estrdup(buf);
 166     }
 167     if(argv[0])
 168         password = argv[0];
 169     if(password == NULL){
 170         if(des_read_pw_string(buf, sizeof(buf), "Password: ", 0))
 171             return 1;
 172         password = buf;
 173     }
 174
 175     if(version5){
 176         krb5_parse_name(context, principal, &princ);
 177         krb5_get_pw_salt(context, princ, &salt);
 178         tokey(context, etype, password, salt, "Kerberos 5 (%s)");
 179         krb5_free_salt(context, salt);
 180     }
 181     if(version4){
 182         salt.salttype = KRB5_PW_SALT;
 183         salt.saltvalue.length = 0;
 184         salt.saltvalue.data = NULL;
 185         tokey(context, ETYPE_DES_CBC_MD5, password, salt, "Kerberos 4");
 186     }
 187     if(afs){
 188         salt.salttype = KRB5_AFS3_SALT;
 189         salt.saltvalue.length = strlen(cell);
 190         salt.saltvalue.data = cell;
 191         tokey(context, ETYPE_DES_CBC_MD5, password, salt, "AFS");
 192     }
 193     return 0;
 194 }