1 /* $NetBSD: h_comp.c,v 1.1 2014/01/14 17:51:39 pgoyette Exp $ */
4 * Copyright (c) 2014 The NetBSD Foundation, Inc.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
35 #include <sys/ioctl.h>
38 #include <crypto/cryptodev.h>
40 char text[100000] = {0};
47 struct crypt_op co1, co2;
48 unsigned char buf1[10000], buf2[100000];
50 fd = open("/dev/crypto", O_RDWR, 0);
53 memset(&cs, 0, sizeof(cs));
54 cs.comp_alg = CRYPTO_GZIP_COMP;
55 res = ioctl(fd, CIOCGSESSION, &cs);
57 err(1, "CIOCGSESSION");
59 memset(&co1, 0, sizeof(co1));
62 co1.len = sizeof(text);
65 co1.dst_len = sizeof(buf1);
66 res = ioctl(fd, CIOCCRYPT, &co1);
69 fprintf(stderr, "len %d/%d\n", co1.len, co1.dst_len);
71 buf1[co1.dst_len - 8]++; /* modify CRC */
73 write(1, buf1, co1.dst_len);
74 memset(&co2, 0, sizeof(co2));
77 co2.len = co1.dst_len;
80 co2.dst_len = sizeof(buf2);
82 res = ioctl(fd, CIOCCRYPT, &co2);
83 fprintf(stderr, "canary: %x\n", buf2[10]);
86 fprintf(stderr, "len %d/%d\n", co2.len, co2.dst_len);
87 if (memcmp(text, buf2, co2.dst_len))