lib/krb5/test_crypto_wrapping.c

   1 /*
   2  * Copyright (c) 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 KTH nor the names of its contributors may be
  18  *    used to endorse or promote products derived from this software without
  19  *    specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY KTH AND ITS CONTRIBUTORS ``AS IS'' AND ANY
  22  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  24  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL KTH OR ITS CONTRIBUTORS BE
  25  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  26  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  27  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  28  * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  29  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  30  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  31  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */
  32
  33 #include "krb5_locl.h"
  34 #include <err.h>
  35 #include <getarg.h>
  36
  37 static void
  38 test_wrapping(krb5_context context,
  39               size_t min_size,
  40               size_t max_size,
  41               size_t step,
  42               krb5_enctype etype)
  43 {
  44     krb5_error_code ret;
  45     krb5_keyblock key;
  46     krb5_crypto crypto;
  47     krb5_data data;
  48     char *etype_name;
  49     void *buf;
  50     size_t size;
  51
  52     ret = krb5_generate_random_keyblock(context, etype, &key);
  53     if (ret)
  54         krb5_err(context, 1, ret, "krb5_generate_random_keyblock");
  55
  56     ret = krb5_enctype_to_string(context, etype, &etype_name);
  57     if (ret)
  58         krb5_err(context, 1, ret, "krb5_enctype_to_string");
  59
  60     buf = malloc(max_size);
  61     if (buf == NULL)
  62         krb5_errx(context, 1, "out of memory");
  63     memset(buf, 0, max_size);
  64
  65     ret = krb5_crypto_init(context, &key, 0, &crypto);
  66     if (ret)
  67         krb5_err(context, 1, ret, "krb5_crypto_init");
  68
  69     for (size = min_size; size < max_size; size += step) {
  70         size_t wrapped_size;
  71
  72         ret = krb5_encrypt(context, crypto, 0, buf, size, &data);
  73         if (ret)
  74             krb5_err(context, 1, ret, "encrypt size %lu using %s",
  75                      (unsigned long)size, etype_name);
  76
  77         wrapped_size = krb5_get_wrapped_length(context, crypto, size);
  78
  79         if (wrapped_size != data.length)
  80             krb5_errx(context, 1, "calculated wrapped length %lu != "
  81                       "real wrapped length %lu for data length %lu using "
  82                       "enctype %s",
  83                       (unsigned long)wrapped_size,
  84                       (unsigned long)data.length,
  85                       (unsigned long)size,
  86                       etype_name);
  87         krb5_data_free(&data);
  88     }
  89
  90     free(etype_name);
  91     free(buf);
  92     krb5_crypto_destroy(context, crypto);
  93     krb5_free_keyblock_contents(context, &key);
  94 }
  95
  96
  97
  98 static int version_flag = 0;
  99 static int help_flag    = 0;
 100
 101 static struct getargs args[] = {
 102     {"version", 0,      arg_flag,       &version_flag,
 103      "print version", NULL },
 104     {"help",    0,      arg_flag,       &help_flag,
 105      NULL, NULL }
 106 };
 107
 108 static void
 109 usage (int ret)
 110 {
 111     arg_printusage (args,
 112                     sizeof(args)/sizeof(*args),
 113                     NULL,
 114                     "");
 115     exit (ret);
 116 }
 117
 118 int
 119 main(int argc, char **argv)
 120 {
 121     krb5_context context;
 122     krb5_error_code ret;
 123     int i, optidx = 0;
 124
 125     krb5_enctype enctypes[] = {
 126 #ifdef HEIM_WEAK_CRYPTO
 127         ETYPE_DES_CBC_CRC,
 128         ETYPE_DES_CBC_MD4,
 129         ETYPE_DES_CBC_MD5,
 130 #endif
 131         ETYPE_DES3_CBC_SHA1,
 132         ETYPE_ARCFOUR_HMAC_MD5,
 133         ETYPE_AES128_CTS_HMAC_SHA1_96,
 134         ETYPE_AES256_CTS_HMAC_SHA1_96
 135     };
 136
 137     setprogname(argv[0]);
 138
 139     if(getarg(args, sizeof(args) / sizeof(args[0]), argc, argv, &optidx))
 140         usage(1);
 141
 142     if (help_flag)
 143         usage (0);
 144
 145     if(version_flag){
 146         print_version(NULL);
 147         exit(0);
 148     }
 149
 150     argc -= optidx;
 151     argv += optidx;
 152
 153     ret = krb5_init_context(&context);
 154     if (ret)
 155         errx (1, "krb5_init_context failed: %d", ret);
 156
 157     for (i = 0; i < sizeof(enctypes)/sizeof(enctypes[0]); i++) {
 158         krb5_enctype_enable(context, enctypes[i]);
 159
 160         test_wrapping(context, 0, 1024, 1, enctypes[i]);
 161         test_wrapping(context, 1024, 1024 * 100, 1024, enctypes[i]);
 162     }
 163     krb5_free_context(context);
 164
 165     return 0;
 166 }