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
37static void
38test_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
98static int version_flag = 0;
99static int help_flag	= 0;
100
101static 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
108static void
109usage (int ret)
110{
111    arg_printusage (args,
112		    sizeof(args)/sizeof(*args),
113		    NULL,
114		    "");
115    exit (ret);
116}
117
118int
119main(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}
167