tests/test-crypto-afsplit.c

   1 /*
   2  * QEMU Crypto anti-forensic splitter
   3  *
   4  * Copyright (c) 2015-2016 Red Hat, Inc.
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  18  *
  19  */
  20
  21 #include "qemu/osdep.h"
  22 #include "crypto/init.h"
  23 #include "crypto/afsplit.h"
  24
  25 typedef struct QCryptoAFSplitTestData QCryptoAFSplitTestData;
  26 struct QCryptoAFSplitTestData {
  27     const char *path;
  28     QCryptoHashAlgorithm hash;
  29     uint32_t stripes;
  30     size_t blocklen;
  31     const uint8_t *key;
  32     const uint8_t *splitkey;
  33 };
  34
  35 static QCryptoAFSplitTestData test_data[] = {
  36     {
  37         .path = "/crypto/afsplit/sha256/5",
  38         .hash = QCRYPTO_HASH_ALG_SHA256,
  39         .stripes = 5,
  40         .blocklen = 32,
  41         .key = (const uint8_t *)
  42             "\x00\x01\x02\x03\x04\x05\x06\x07"
  43             "\x08\x09\x0a\x0b\x0c\x0d\x0e\x0f"
  44             "\xa0\xa1\xa2\xa3\xa4\xa5\xa6\xa7"
  45             "\xa8\xa9\xaa\xab\xac\xad\xae\xaf",
  46         .splitkey = (const uint8_t *)
  47             "\xfd\xd2\x73\xb1\x7d\x99\x93\x34"
  48             "\x70\xde\xfa\x07\xc5\xac\x58\xd2"
  49             "\x30\x67\x2f\x1a\x35\x43\x60\x7d"
  50             "\x77\x02\xdb\x62\x3c\xcb\x2c\x33"
  51             "\x48\x08\xb6\xf1\x7c\xa3\x20\xa0"
  52             "\xad\x2d\x4c\xf3\xcd\x18\x6f\x53"
  53             "\xf9\xe8\xe7\x59\x27\x3c\xa9\x54"
  54             "\x61\x87\xb3\xaf\xf6\xf7\x7e\x64"
  55             "\x86\xaa\x89\x7f\x1f\x9f\xdb\x86"
  56             "\xf4\xa2\x16\xff\xa3\x4f\x8c\xa1"
  57             "\x59\xc4\x23\x34\x28\xc4\x77\x71"
  58             "\x83\xd4\xcd\x8e\x89\x1b\xc7\xc5"
  59             "\xae\x4d\xa9\xcd\xc9\x72\x85\x70"
  60             "\x13\x68\x52\x83\xfc\xb8\x11\x72"
  61             "\xba\x3d\xc6\x4a\x28\xfa\xe2\x86"
  62             "\x7b\x27\xab\x58\xe1\xa4\xca\xf6"
  63             "\x9e\xbc\xfe\x0c\x92\x79\xb3\xec"
  64             "\x1c\x5f\x79\x3b\x0d\x1e\xaa\x1a"
  65             "\x77\x0f\x70\x19\x4b\xc8\x80\xee"
  66             "\x27\x7c\x6e\x4a\x91\x96\x5c\xf4"
  67     },
  68     {
  69         .path = "/crypto/afsplit/sha256/5000",
  70         .hash = QCRYPTO_HASH_ALG_SHA256,
  71         .stripes = 5000,
  72         .blocklen = 16,
  73         .key = (const uint8_t *)
  74             "\x00\x01\x02\x03\x04\x05\x06\x07"
  75             "\x08\x09\x0a\x0b\x0c\x0d\x0e\x0f",
  76     },
  77     {
  78         .path = "/crypto/afsplit/sha1/1000",
  79         .hash = QCRYPTO_HASH_ALG_SHA1,
  80         .stripes = 1000,
  81         .blocklen = 32,
  82         .key = (const uint8_t *)
  83             "\x00\x01\x02\x03\x04\x05\x06\x07"
  84             "\x08\x09\x0a\x0b\x0c\x0d\x0e\x0f"
  85             "\xa0\xa1\xa2\xa3\xa4\xa5\xa6\xa7"
  86             "\xa8\xa9\xaa\xab\xac\xad\xae\xaf",
  87     },
  88     {
  89         .path = "/crypto/afsplit/sha256/big",
  90         .hash = QCRYPTO_HASH_ALG_SHA256,
  91         .stripes = 1000,
  92         .blocklen = 64,
  93         .key = (const uint8_t *)
  94             "\x00\x01\x02\x03\x04\x05\x06\x07"
  95             "\x08\x09\x0a\x0b\x0c\x0d\x0e\x0f"
  96             "\x00\x01\x02\x03\x04\x05\x06\x07"
  97             "\x08\x09\x0a\x0b\x0c\x0d\x0e\x0f"
  98             "\x00\x01\x02\x03\x04\x05\x06\x07"
  99             "\x08\x09\x0a\x0b\x0c\x0d\x0e\x0f"
 100             "\x00\x01\x02\x03\x04\x05\x06\x07"
 101             "\x08\x09\x0a\x0b\x0c\x0d\x0e\x0f",
 102     },
 103 };
 104
 105
 106 static inline char hex(int i)
 107 {
 108     if (i < 10) {
 109         return '0' + i;
 110     }
 111     return 'a' + (i - 10);
 112 }
 113
 114 static char *hex_string(const uint8_t *bytes,
 115                         size_t len)
 116 {
 117     char *hexstr = g_new0(char, len * 2 + 1);
 118     size_t i;
 119
 120     for (i = 0; i < len; i++) {
 121         hexstr[i * 2] = hex((bytes[i] >> 4) & 0xf);
 122         hexstr[i * 2 + 1] = hex(bytes[i] & 0xf);
 123     }
 124     hexstr[len * 2] = '\0';
 125
 126     return hexstr;
 127 }
 128
 129 static void test_afsplit(const void *opaque)
 130 {
 131     const QCryptoAFSplitTestData *data = opaque;
 132     size_t splitlen = data->blocklen * data->stripes;
 133     uint8_t *splitkey = g_new0(uint8_t, splitlen);
 134     uint8_t *key = g_new0(uint8_t, data->blocklen);
 135     gchar *expect, *actual;
 136
 137     /* First time we round-trip the key */
 138     qcrypto_afsplit_encode(data->hash,
 139                            data->blocklen, data->stripes,
 140                            data->key, splitkey,
 141                            &error_abort);
 142
 143     qcrypto_afsplit_decode(data->hash,
 144                            data->blocklen, data->stripes,
 145                            splitkey, key,
 146                            &error_abort);
 147
 148     expect = hex_string(data->key, data->blocklen);
 149     actual = hex_string(key, data->blocklen);
 150
 151     g_assert_cmpstr(actual, ==, expect);
 152
 153     g_free(actual);
 154     g_free(expect);
 155
 156     /* Second time we merely try decoding a previous split */
 157     if (data->splitkey) {
 158         memset(key, 0, data->blocklen);
 159
 160         qcrypto_afsplit_decode(data->hash,
 161                                data->blocklen, data->stripes,
 162                                data->splitkey, key,
 163                                &error_abort);
 164
 165         expect = hex_string(data->key, data->blocklen);
 166         actual = hex_string(key, data->blocklen);
 167
 168         g_assert_cmpstr(actual, ==, expect);
 169
 170         g_free(actual);
 171         g_free(expect);
 172     }
 173
 174     g_free(key);
 175     g_free(splitkey);
 176 }
 177
 178 int main(int argc, char **argv)
 179 {
 180     size_t i;
 181
 182     g_test_init(&argc, &argv, NULL);
 183
 184     g_assert(qcrypto_init(NULL) == 0);
 185
 186     for (i = 0; i < G_N_ELEMENTS(test_data); i++) {
 187         if (!qcrypto_hash_supports(test_data[i].hash)) {
 188             continue;
 189         }
 190         g_test_add_data_func(test_data[i].path, &test_data[i], test_afsplit);
 191     }
 192     return g_test_run();
 193 }