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 2.1 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 "qapi/error.h"
  23 #include "crypto/init.h"
  24 #include "crypto/afsplit.h"
  25
  26 typedef struct QCryptoAFSplitTestData QCryptoAFSplitTestData;
  27 struct QCryptoAFSplitTestData {
  28     const char *path;
  29     QCryptoHashAlgorithm hash;
  30     uint32_t stripes;
  31     size_t blocklen;
  32     const uint8_t *key;
  33     const uint8_t *splitkey;
  34 };
  35
  36 static QCryptoAFSplitTestData test_data[] = {
  37     {
  38         .path = "/crypto/afsplit/sha256/5",
  39         .hash = QCRYPTO_HASH_ALG_SHA256,
  40         .stripes = 5,
  41         .blocklen = 32,
  42         .key = (const uint8_t *)
  43             "\x00\x01\x02\x03\x04\x05\x06\x07"
  44             "\x08\x09\x0a\x0b\x0c\x0d\x0e\x0f"
  45             "\xa0\xa1\xa2\xa3\xa4\xa5\xa6\xa7"
  46             "\xa8\xa9\xaa\xab\xac\xad\xae\xaf",
  47         .splitkey = (const uint8_t *)
  48             "\xfd\xd2\x73\xb1\x7d\x99\x93\x34"
  49             "\x70\xde\xfa\x07\xc5\xac\x58\xd2"
  50             "\x30\x67\x2f\x1a\x35\x43\x60\x7d"
  51             "\x77\x02\xdb\x62\x3c\xcb\x2c\x33"
  52             "\x48\x08\xb6\xf1\x7c\xa3\x20\xa0"
  53             "\xad\x2d\x4c\xf3\xcd\x18\x6f\x53"
  54             "\xf9\xe8\xe7\x59\x27\x3c\xa9\x54"
  55             "\x61\x87\xb3\xaf\xf6\xf7\x7e\x64"
  56             "\x86\xaa\x89\x7f\x1f\x9f\xdb\x86"
  57             "\xf4\xa2\x16\xff\xa3\x4f\x8c\xa1"
  58             "\x59\xc4\x23\x34\x28\xc4\x77\x71"
  59             "\x83\xd4\xcd\x8e\x89\x1b\xc7\xc5"
  60             "\xae\x4d\xa9\xcd\xc9\x72\x85\x70"
  61             "\x13\x68\x52\x83\xfc\xb8\x11\x72"
  62             "\xba\x3d\xc6\x4a\x28\xfa\xe2\x86"
  63             "\x7b\x27\xab\x58\xe1\xa4\xca\xf6"
  64             "\x9e\xbc\xfe\x0c\x92\x79\xb3\xec"
  65             "\x1c\x5f\x79\x3b\x0d\x1e\xaa\x1a"
  66             "\x77\x0f\x70\x19\x4b\xc8\x80\xee"
  67             "\x27\x7c\x6e\x4a\x91\x96\x5c\xf4"
  68     },
  69     {
  70         .path = "/crypto/afsplit/sha256/5000",
  71         .hash = QCRYPTO_HASH_ALG_SHA256,
  72         .stripes = 5000,
  73         .blocklen = 16,
  74         .key = (const uint8_t *)
  75             "\x00\x01\x02\x03\x04\x05\x06\x07"
  76             "\x08\x09\x0a\x0b\x0c\x0d\x0e\x0f",
  77     },
  78     {
  79         .path = "/crypto/afsplit/sha1/1000",
  80         .hash = QCRYPTO_HASH_ALG_SHA1,
  81         .stripes = 1000,
  82         .blocklen = 32,
  83         .key = (const uint8_t *)
  84             "\x00\x01\x02\x03\x04\x05\x06\x07"
  85             "\x08\x09\x0a\x0b\x0c\x0d\x0e\x0f"
  86             "\xa0\xa1\xa2\xa3\xa4\xa5\xa6\xa7"
  87             "\xa8\xa9\xaa\xab\xac\xad\xae\xaf",
  88     },
  89     {
  90         .path = "/crypto/afsplit/sha256/big",
  91         .hash = QCRYPTO_HASH_ALG_SHA256,
  92         .stripes = 1000,
  93         .blocklen = 64,
  94         .key = (const uint8_t *)
  95             "\x00\x01\x02\x03\x04\x05\x06\x07"
  96             "\x08\x09\x0a\x0b\x0c\x0d\x0e\x0f"
  97             "\x00\x01\x02\x03\x04\x05\x06\x07"
  98             "\x08\x09\x0a\x0b\x0c\x0d\x0e\x0f"
  99             "\x00\x01\x02\x03\x04\x05\x06\x07"
 100             "\x08\x09\x0a\x0b\x0c\x0d\x0e\x0f"
 101             "\x00\x01\x02\x03\x04\x05\x06\x07"
 102             "\x08\x09\x0a\x0b\x0c\x0d\x0e\x0f",
 103     },
 104 };
 105
 106
 107 static inline char hex(int i)
 108 {
 109     if (i < 10) {
 110         return '0' + i;
 111     }
 112     return 'a' + (i - 10);
 113 }
 114
 115 static char *hex_string(const uint8_t *bytes,
 116                         size_t len)
 117 {
 118     char *hexstr = g_new0(char, len * 2 + 1);
 119     size_t i;
 120
 121     for (i = 0; i < len; i++) {
 122         hexstr[i * 2] = hex((bytes[i] >> 4) & 0xf);
 123         hexstr[i * 2 + 1] = hex(bytes[i] & 0xf);
 124     }
 125     hexstr[len * 2] = '\0';
 126
 127     return hexstr;
 128 }
 129
 130 static void test_afsplit(const void *opaque)
 131 {
 132     const QCryptoAFSplitTestData *data = opaque;
 133     size_t splitlen = data->blocklen * data->stripes;
 134     uint8_t *splitkey = g_new0(uint8_t, splitlen);
 135     uint8_t *key = g_new0(uint8_t, data->blocklen);
 136     gchar *expect, *actual;
 137
 138     /* First time we round-trip the key */
 139     qcrypto_afsplit_encode(data->hash,
 140                            data->blocklen, data->stripes,
 141                            data->key, splitkey,
 142                            &error_abort);
 143
 144     qcrypto_afsplit_decode(data->hash,
 145                            data->blocklen, data->stripes,
 146                            splitkey, key,
 147                            &error_abort);
 148
 149     expect = hex_string(data->key, data->blocklen);
 150     actual = hex_string(key, data->blocklen);
 151
 152     g_assert_cmpstr(actual, ==, expect);
 153
 154     g_free(actual);
 155     g_free(expect);
 156
 157     /* Second time we merely try decoding a previous split */
 158     if (data->splitkey) {
 159         memset(key, 0, data->blocklen);
 160
 161         qcrypto_afsplit_decode(data->hash,
 162                                data->blocklen, data->stripes,
 163                                data->splitkey, key,
 164                                &error_abort);
 165
 166         expect = hex_string(data->key, data->blocklen);
 167         actual = hex_string(key, data->blocklen);
 168
 169         g_assert_cmpstr(actual, ==, expect);
 170
 171         g_free(actual);
 172         g_free(expect);
 173     }
 174
 175     g_free(key);
 176     g_free(splitkey);
 177 }
 178
 179 int main(int argc, char **argv)
 180 {
 181     size_t i;
 182
 183     g_test_init(&argc, &argv, NULL);
 184
 185     g_assert(qcrypto_init(NULL) == 0);
 186
 187     for (i = 0; i < G_N_ELEMENTS(test_data); i++) {
 188         if (!qcrypto_hash_supports(test_data[i].hash)) {
 189             continue;
 190         }
 191         g_test_add_data_func(test_data[i].path, &test_data[i], test_afsplit);
 192     }
 193     return g_test_run();
 194 }