While the crypto layer uses a fixed option name "key-secret", the upper block layer may have a prefix on the options. e.g. "encrypt.key-secret", in order to avoid clashes between crypto option names & other block option names. To ensure the crypto layer can report accurate error messages, we must tell it what option name prefix was used. Reviewed-by: Alberto Garcia <berto@igalia.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Daniel P. Berrange <berrange@redhat.com> Message-id: 20170623162419.26068-19-berrange@redhat.com Signed-off-by: Max Reitz <mreitz@redhat.com>
364 lines
9.6 KiB
C
364 lines
9.6 KiB
C
/*
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* QEMU Crypto block encryption
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*
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* Copyright (c) 2016 Red Hat, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include "qemu/osdep.h"
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#include "qapi/error.h"
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#include "crypto/init.h"
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#include "crypto/block.h"
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#include "qemu/buffer.h"
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#include "crypto/secret.h"
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#ifndef _WIN32
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#include <sys/resource.h>
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#endif
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#if (defined(_WIN32) || defined RUSAGE_THREAD)
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#define TEST_LUKS
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#else
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#undef TEST_LUKS
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#endif
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static QCryptoBlockCreateOptions qcow_create_opts = {
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.format = Q_CRYPTO_BLOCK_FORMAT_QCOW,
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.u.qcow = {
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.has_key_secret = true,
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.key_secret = (char *)"sec0",
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},
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};
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static QCryptoBlockOpenOptions qcow_open_opts = {
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.format = Q_CRYPTO_BLOCK_FORMAT_QCOW,
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.u.qcow = {
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.has_key_secret = true,
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.key_secret = (char *)"sec0",
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},
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};
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#ifdef TEST_LUKS
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static QCryptoBlockOpenOptions luks_open_opts = {
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.format = Q_CRYPTO_BLOCK_FORMAT_LUKS,
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.u.luks = {
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.has_key_secret = true,
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.key_secret = (char *)"sec0",
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},
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};
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/* Creation with all default values */
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static QCryptoBlockCreateOptions luks_create_opts_default = {
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.format = Q_CRYPTO_BLOCK_FORMAT_LUKS,
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.u.luks = {
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.has_key_secret = true,
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.key_secret = (char *)"sec0",
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},
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};
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/* ...and with explicit values */
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static QCryptoBlockCreateOptions luks_create_opts_aes256_cbc_plain64 = {
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.format = Q_CRYPTO_BLOCK_FORMAT_LUKS,
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.u.luks = {
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.has_key_secret = true,
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.key_secret = (char *)"sec0",
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.has_cipher_alg = true,
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.cipher_alg = QCRYPTO_CIPHER_ALG_AES_256,
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.has_cipher_mode = true,
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.cipher_mode = QCRYPTO_CIPHER_MODE_CBC,
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.has_ivgen_alg = true,
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.ivgen_alg = QCRYPTO_IVGEN_ALG_PLAIN64,
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},
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};
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static QCryptoBlockCreateOptions luks_create_opts_aes256_cbc_essiv = {
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.format = Q_CRYPTO_BLOCK_FORMAT_LUKS,
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.u.luks = {
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.has_key_secret = true,
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.key_secret = (char *)"sec0",
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.has_cipher_alg = true,
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.cipher_alg = QCRYPTO_CIPHER_ALG_AES_256,
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.has_cipher_mode = true,
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.cipher_mode = QCRYPTO_CIPHER_MODE_CBC,
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.has_ivgen_alg = true,
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.ivgen_alg = QCRYPTO_IVGEN_ALG_ESSIV,
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.has_ivgen_hash_alg = true,
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.ivgen_hash_alg = QCRYPTO_HASH_ALG_SHA256,
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.has_hash_alg = true,
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.hash_alg = QCRYPTO_HASH_ALG_SHA1,
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},
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};
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#endif /* TEST_LUKS */
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static struct QCryptoBlockTestData {
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const char *path;
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QCryptoBlockCreateOptions *create_opts;
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QCryptoBlockOpenOptions *open_opts;
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bool expect_header;
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QCryptoCipherAlgorithm cipher_alg;
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QCryptoCipherMode cipher_mode;
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QCryptoHashAlgorithm hash_alg;
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QCryptoIVGenAlgorithm ivgen_alg;
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QCryptoHashAlgorithm ivgen_hash;
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bool slow;
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} test_data[] = {
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{
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.path = "/crypto/block/qcow",
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.create_opts = &qcow_create_opts,
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.open_opts = &qcow_open_opts,
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.expect_header = false,
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.cipher_alg = QCRYPTO_CIPHER_ALG_AES_128,
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.cipher_mode = QCRYPTO_CIPHER_MODE_CBC,
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.ivgen_alg = QCRYPTO_IVGEN_ALG_PLAIN64,
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},
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#ifdef TEST_LUKS
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{
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.path = "/crypto/block/luks/default",
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.create_opts = &luks_create_opts_default,
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.open_opts = &luks_open_opts,
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.expect_header = true,
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.cipher_alg = QCRYPTO_CIPHER_ALG_AES_256,
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.cipher_mode = QCRYPTO_CIPHER_MODE_XTS,
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.hash_alg = QCRYPTO_HASH_ALG_SHA256,
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.ivgen_alg = QCRYPTO_IVGEN_ALG_PLAIN64,
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.slow = true,
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},
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{
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.path = "/crypto/block/luks/aes-256-cbc-plain64",
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.create_opts = &luks_create_opts_aes256_cbc_plain64,
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.open_opts = &luks_open_opts,
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.expect_header = true,
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.cipher_alg = QCRYPTO_CIPHER_ALG_AES_256,
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.cipher_mode = QCRYPTO_CIPHER_MODE_CBC,
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.hash_alg = QCRYPTO_HASH_ALG_SHA256,
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.ivgen_alg = QCRYPTO_IVGEN_ALG_PLAIN64,
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.slow = true,
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},
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{
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.path = "/crypto/block/luks/aes-256-cbc-essiv",
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.create_opts = &luks_create_opts_aes256_cbc_essiv,
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.open_opts = &luks_open_opts,
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.expect_header = true,
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.cipher_alg = QCRYPTO_CIPHER_ALG_AES_256,
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.cipher_mode = QCRYPTO_CIPHER_MODE_CBC,
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.hash_alg = QCRYPTO_HASH_ALG_SHA1,
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.ivgen_alg = QCRYPTO_IVGEN_ALG_ESSIV,
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.ivgen_hash = QCRYPTO_HASH_ALG_SHA256,
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.slow = true,
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},
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#endif
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};
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static ssize_t test_block_read_func(QCryptoBlock *block,
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size_t offset,
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uint8_t *buf,
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size_t buflen,
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void *opaque,
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Error **errp)
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{
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Buffer *header = opaque;
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g_assert_cmpint(offset + buflen, <=, header->capacity);
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memcpy(buf, header->buffer + offset, buflen);
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return buflen;
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}
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static ssize_t test_block_init_func(QCryptoBlock *block,
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size_t headerlen,
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void *opaque,
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Error **errp)
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{
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Buffer *header = opaque;
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g_assert_cmpint(header->capacity, ==, 0);
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buffer_reserve(header, headerlen);
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return headerlen;
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}
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static ssize_t test_block_write_func(QCryptoBlock *block,
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size_t offset,
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const uint8_t *buf,
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size_t buflen,
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void *opaque,
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Error **errp)
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{
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Buffer *header = opaque;
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g_assert_cmpint(buflen + offset, <=, header->capacity);
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memcpy(header->buffer + offset, buf, buflen);
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header->offset = offset + buflen;
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return buflen;
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}
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static Object *test_block_secret(void)
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{
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return object_new_with_props(
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TYPE_QCRYPTO_SECRET,
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object_get_objects_root(),
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"sec0",
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&error_abort,
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"data", "123456",
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NULL);
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}
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static void test_block_assert_setup(const struct QCryptoBlockTestData *data,
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QCryptoBlock *blk)
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{
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QCryptoIVGen *ivgen;
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QCryptoCipher *cipher;
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ivgen = qcrypto_block_get_ivgen(blk);
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cipher = qcrypto_block_get_cipher(blk);
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g_assert(ivgen);
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g_assert(cipher);
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g_assert_cmpint(data->cipher_alg, ==, cipher->alg);
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g_assert_cmpint(data->cipher_mode, ==, cipher->mode);
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g_assert_cmpint(data->hash_alg, ==,
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qcrypto_block_get_kdf_hash(blk));
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g_assert_cmpint(data->ivgen_alg, ==,
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qcrypto_ivgen_get_algorithm(ivgen));
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g_assert_cmpint(data->ivgen_hash, ==,
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qcrypto_ivgen_get_hash(ivgen));
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}
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static void test_block(gconstpointer opaque)
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{
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const struct QCryptoBlockTestData *data = opaque;
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QCryptoBlock *blk;
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Buffer header;
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Object *sec = test_block_secret();
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memset(&header, 0, sizeof(header));
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buffer_init(&header, "header");
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blk = qcrypto_block_create(data->create_opts, NULL,
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test_block_init_func,
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test_block_write_func,
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&header,
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&error_abort);
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g_assert(blk);
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if (data->expect_header) {
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g_assert_cmpint(header.capacity, >, 0);
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} else {
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g_assert_cmpint(header.capacity, ==, 0);
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}
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test_block_assert_setup(data, blk);
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qcrypto_block_free(blk);
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object_unparent(sec);
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/* Ensure we can't open without the secret */
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blk = qcrypto_block_open(data->open_opts, NULL,
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test_block_read_func,
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&header,
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0,
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NULL);
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g_assert(blk == NULL);
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/* Ensure we can't open without the secret, unless NO_IO */
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blk = qcrypto_block_open(data->open_opts, NULL,
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test_block_read_func,
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&header,
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QCRYPTO_BLOCK_OPEN_NO_IO,
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&error_abort);
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g_assert(qcrypto_block_get_cipher(blk) == NULL);
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g_assert(qcrypto_block_get_ivgen(blk) == NULL);
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qcrypto_block_free(blk);
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/* Now open for real with secret */
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sec = test_block_secret();
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blk = qcrypto_block_open(data->open_opts, NULL,
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test_block_read_func,
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&header,
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0,
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&error_abort);
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g_assert(blk);
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test_block_assert_setup(data, blk);
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qcrypto_block_free(blk);
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object_unparent(sec);
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buffer_free(&header);
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}
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int main(int argc, char **argv)
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{
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gsize i;
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module_call_init(MODULE_INIT_QOM);
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g_test_init(&argc, &argv, NULL);
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g_assert(qcrypto_init(NULL) == 0);
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for (i = 0; i < G_N_ELEMENTS(test_data); i++) {
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if (test_data[i].open_opts->format == Q_CRYPTO_BLOCK_FORMAT_LUKS &&
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!qcrypto_hash_supports(test_data[i].hash_alg)) {
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continue;
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}
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if (!test_data[i].slow ||
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g_test_slow()) {
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g_test_add_data_func(test_data[i].path, &test_data[i], test_block);
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}
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}
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return g_test_run();
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}
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