/*
* QEMU Crypto anti-forensic splitter
*
* Copyright (c) 2015-2016 Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*
*/
#include "qemu/osdep.h"
#include "qapi/error.h"
#include "crypto/init.h"
#include "crypto/afsplit.h"
typedef struct QCryptoAFSplitTestData QCryptoAFSplitTestData;
struct QCryptoAFSplitTestData {
const char *path;
QCryptoHashAlgorithm hash;
uint32_t stripes;
size_t blocklen;
const uint8_t *key;
const uint8_t *splitkey;
};
static QCryptoAFSplitTestData test_data[] = {
{
.path = "/crypto/afsplit/sha256/5",
.hash = QCRYPTO_HASH_ALG_SHA256,
.stripes = 5,
.blocklen = 32,
.key = (const uint8_t *)
"\x00\x01\x02\x03\x04\x05\x06\x07"
"\x08\x09\x0a\x0b\x0c\x0d\x0e\x0f"
"\xa0\xa1\xa2\xa3\xa4\xa5\xa6\xa7"
"\xa8\xa9\xaa\xab\xac\xad\xae\xaf",
.splitkey = (const uint8_t *)
"\xfd\xd2\x73\xb1\x7d\x99\x93\x34"
"\x70\xde\xfa\x07\xc5\xac\x58\xd2"
"\x30\x67\x2f\x1a\x35\x43\x60\x7d"
"\x77\x02\xdb\x62\x3c\xcb\x2c\x33"
"\x48\x08\xb6\xf1\x7c\xa3\x20\xa0"
"\xad\x2d\x4c\xf3\xcd\x18\x6f\x53"
"\xf9\xe8\xe7\x59\x27\x3c\xa9\x54"
"\x61\x87\xb3\xaf\xf6\xf7\x7e\x64"
"\x86\xaa\x89\x7f\x1f\x9f\xdb\x86"
"\xf4\xa2\x16\xff\xa3\x4f\x8c\xa1"
"\x59\xc4\x23\x34\x28\xc4\x77\x71"
"\x83\xd4\xcd\x8e\x89\x1b\xc7\xc5"
"\xae\x4d\xa9\xcd\xc9\x72\x85\x70"
"\x13\x68\x52\x83\xfc\xb8\x11\x72"
"\xba\x3d\xc6\x4a\x28\xfa\xe2\x86"
"\x7b\x27\xab\x58\xe1\xa4\xca\xf6"
"\x9e\xbc\xfe\x0c\x92\x79\xb3\xec"
"\x1c\x5f\x79\x3b\x0d\x1e\xaa\x1a"
"\x77\x0f\x70\x19\x4b\xc8\x80\xee"
"\x27\x7c\x6e\x4a\x91\x96\x5c\xf4"
},
{
.path = "/crypto/afsplit/sha256/5000",
.hash = QCRYPTO_HASH_ALG_SHA256,
.stripes = 5000,
.blocklen = 16,
.key = (const uint8_t *)
"\x00\x01\x02\x03\x04\x05\x06\x07"
"\x08\x09\x0a\x0b\x0c\x0d\x0e\x0f",
},
{
.path = "/crypto/afsplit/sha1/1000",
.hash = QCRYPTO_HASH_ALG_SHA1,
.stripes = 1000,
.blocklen = 32,
.key = (const uint8_t *)
"\x00\x01\x02\x03\x04\x05\x06\x07"
"\x08\x09\x0a\x0b\x0c\x0d\x0e\x0f"
"\xa0\xa1\xa2\xa3\xa4\xa5\xa6\xa7"
"\xa8\xa9\xaa\xab\xac\xad\xae\xaf",
},
{
.path = "/crypto/afsplit/sha256/big",
.hash = QCRYPTO_HASH_ALG_SHA256,
.stripes = 1000,
.blocklen = 64,
.key = (const uint8_t *)
"\x00\x01\x02\x03\x04\x05\x06\x07"
"\x08\x09\x0a\x0b\x0c\x0d\x0e\x0f"
"\x00\x01\x02\x03\x04\x05\x06\x07"
"\x08\x09\x0a\x0b\x0c\x0d\x0e\x0f"
"\x00\x01\x02\x03\x04\x05\x06\x07"
"\x08\x09\x0a\x0b\x0c\x0d\x0e\x0f"
"\x00\x01\x02\x03\x04\x05\x06\x07"
"\x08\x09\x0a\x0b\x0c\x0d\x0e\x0f",
},
};
static inline char hex(int i)
{
if (i < 10) {
return '0' + i;
}
return 'a' + (i - 10);
}
static char *hex_string(const uint8_t *bytes,
size_t len)
{
char *hexstr = g_new0(char, len * 2 + 1);
size_t i;
for (i = 0; i < len; i++) {
hexstr[i * 2] = hex((bytes[i] >> 4) & 0xf);
hexstr[i * 2 + 1] = hex(bytes[i] & 0xf);
}
hexstr[len * 2] = '\0';
return hexstr;
}
static void test_afsplit(const void *opaque)
{
const QCryptoAFSplitTestData *data = opaque;
size_t splitlen = data->blocklen * data->stripes;
uint8_t *splitkey = g_new0(uint8_t, splitlen);
uint8_t *key = g_new0(uint8_t, data->blocklen);
gchar *expect, *actual;
/* First time we round-trip the key */
qcrypto_afsplit_encode(data->hash,
data->blocklen, data->stripes,
data->key, splitkey,
&error_abort);
qcrypto_afsplit_decode(data->hash,
data->blocklen, data->stripes,
splitkey, key,
&error_abort);
expect = hex_string(data->key, data->blocklen);
actual = hex_string(key, data->blocklen);
g_assert_cmpstr(actual, ==, expect);
g_free(actual);
g_free(expect);
/* Second time we merely try decoding a previous split */
if (data->splitkey) {
memset(key, 0, data->blocklen);
qcrypto_afsplit_decode(data->hash,
data->blocklen, data->stripes,
data->splitkey, key,
&error_abort);
expect = hex_string(data->key, data->blocklen);
actual = hex_string(key, data->blocklen);
g_assert_cmpstr(actual, ==, expect);
g_free(actual);
g_free(expect);
}
g_free(key);
g_free(splitkey);
}
int main(int argc, char **argv)
{
size_t i;
g_test_init(&argc, &argv, NULL);
g_assert(qcrypto_init(NULL) == 0);
for (i = 0; i < G_N_ELEMENTS(test_data); i++) {
if (!qcrypto_hash_supports(test_data[i].hash)) {
continue;
}
g_test_add_data_func(test_data[i].path, &test_data[i], test_afsplit);
}
return g_test_run();
}
