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/* Copyright 2019 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*
* Tests for vb2_hash_(calculate|verify) functions, and hwcrypto handling
* of vb2_digest_*.
*/
#include "2api.h"
#include "2return_codes.h"
#include "2sha.h"
#include "2sysincludes.h"
#include "common/tests.h"
uint8_t mock_sha1[] = {0x1, 0x3, 0x5, 0x2, 0x4, 0x6, 0xa, 0xb, 0xc, 0xd,
0xd, 0xe, 0xa, 0xd, 0xb, 0xe, 0xe, 0xf, 0x0, 0xf0};
_Static_assert(sizeof(mock_sha1) == VB2_SHA1_DIGEST_SIZE, "");
struct vb2_hash mock_hash;
uint8_t mock_buffer[] = "Mock Buffer";
static enum hwcrypto_state {
HWCRYPTO_OK,
HWCRYPTO_NOTSUPPORTED,
HWCRYPTO_ERROR,
HWCRYPTO_ABORT,
} hwcrypto_state;
static vb2_error_t hwcrypto_mock(enum hwcrypto_state *state)
{
switch (*state) {
case HWCRYPTO_OK:
return VB2_SUCCESS;
case HWCRYPTO_NOTSUPPORTED:
return VB2_ERROR_EX_HWCRYPTO_UNSUPPORTED;
case HWCRYPTO_ERROR:
return VB2_ERROR_MOCK;
case HWCRYPTO_ABORT:
vb2ex_abort();
/* shouldn't reach here but added for compiler */
return VB2_ERROR_MOCK;
}
return VB2_ERROR_MOCK;
}
static void reset_common_data(enum hwcrypto_state state)
{
hwcrypto_state = state;
memset(&mock_hash, 0xaa, sizeof(mock_hash));
}
void vb2_sha1_init(struct vb2_sha1_context *ctx)
{
TEST_TRUE(hwcrypto_state == HWCRYPTO_NOTSUPPORTED ||
hwcrypto_state == HWCRYPTO_ABORT,
" hwcrypto_state in SW init");
}
void vb2_sha1_update(struct vb2_sha1_context *ctx,
const uint8_t *data,
uint32_t size)
{
TEST_TRUE(hwcrypto_state == HWCRYPTO_NOTSUPPORTED ||
hwcrypto_state == HWCRYPTO_ABORT,
" hwcrypto_state in SW extend");
TEST_PTR_EQ(data, mock_buffer, " digest_extend buf");
TEST_EQ(size, sizeof(mock_buffer), " digest_extend size");
}
void vb2_sha1_finalize(struct vb2_sha1_context *ctx, uint8_t *digest)
{
TEST_TRUE(hwcrypto_state == HWCRYPTO_NOTSUPPORTED ||
hwcrypto_state == HWCRYPTO_ABORT,
" hwcrypto_state in SW finalize");
memcpy(digest, mock_sha1, sizeof(mock_sha1));
}
vb2_error_t vb2ex_hwcrypto_digest_init(enum vb2_hash_algorithm hash_alg,
uint32_t data_size)
{
if (data_size)
TEST_EQ(data_size, sizeof(mock_buffer),
" hwcrypto_digest_init size");
return hwcrypto_mock(&hwcrypto_state);
}
vb2_error_t vb2ex_hwcrypto_digest_extend(const uint8_t *buf, uint32_t size)
{
TEST_PTR_EQ(buf, mock_buffer, " hwcrypto_digest_extend buf");
TEST_EQ(size, sizeof(mock_buffer), " hwcrypto_digest_extend size");
return hwcrypto_mock(&hwcrypto_state);
}
vb2_error_t vb2ex_hwcrypto_digest_finalize(uint8_t *digest,
uint32_t digest_size)
{
memcpy(digest, mock_sha1, sizeof(mock_sha1));
return hwcrypto_mock(&hwcrypto_state);
}
static void vb2_hash_cbfs_compatibility_test(void)
{
/* 'algo' used to be represented as a 4-byte big-endian in CBFS. Confirm
that the new representation is binary compatible for small values. */
union {
struct vb2_hash hash;
struct {
uint32_t be32;
uint8_t bytes[0];
};
} test = {0};
test.be32 = htobe32(0xa5);
TEST_EQ(test.hash.algo, 0xa5, "vb2_hash algo compatible to CBFS attr");
TEST_PTR_EQ(&test.hash.raw, &test.bytes, " digest offset matches");
}
static void vb2_hash_calculate_tests(void)
{
reset_common_data(HWCRYPTO_ABORT);
TEST_SUCC(vb2_hash_calculate(false, &mock_buffer, sizeof(mock_buffer),
VB2_HASH_SHA1, &mock_hash),
"hash_calculate success");
TEST_SUCC(memcmp(mock_hash.sha1, mock_sha1, sizeof(mock_sha1)),
" got the right hash");
TEST_EQ(mock_hash.algo, VB2_HASH_SHA1, " set algo correctly");
reset_common_data(HWCRYPTO_ABORT);
TEST_EQ(vb2_hash_calculate(false, mock_buffer, sizeof(mock_buffer),
-1, &mock_hash),
VB2_ERROR_SHA_INIT_ALGORITHM, "hash_calculate wrong algo");
}
static void vb2_hash_verify_tests(void)
{
reset_common_data(HWCRYPTO_ABORT);
memcpy(mock_hash.sha1, mock_sha1, sizeof(mock_sha1));
mock_hash.algo = VB2_HASH_SHA1;
TEST_SUCC(vb2_hash_verify(false, mock_buffer, sizeof(mock_buffer),
&mock_hash), "hash_verify success");
memcpy(mock_hash.sha1, mock_sha1, sizeof(mock_sha1));
mock_hash.algo = -1;
TEST_EQ(vb2_hash_verify(false, mock_buffer, sizeof(mock_buffer),
&mock_hash), VB2_ERROR_SHA_INIT_ALGORITHM,
"hash_verify wrong algo");
memcpy(mock_hash.sha1, mock_sha1, sizeof(mock_sha1));
mock_hash.sha1[5] = 0xfe;
mock_hash.algo = VB2_HASH_SHA1;
TEST_EQ(vb2_hash_verify(false, mock_buffer, sizeof(mock_buffer),
&mock_hash), VB2_ERROR_SHA_MISMATCH,
"hash_verify mismatch");
}
static void vb2_hash_hwcrypto_tests(void)
{
struct vb2_digest_context dc;
reset_common_data(HWCRYPTO_OK);
TEST_SUCC(vb2_digest_init(&dc, true, VB2_HASH_SHA1,
sizeof(mock_buffer)),
"digest_init, HW enabled");
TEST_EQ(dc.using_hwcrypto, 1, " using_hwcrypto set");
TEST_SUCC(vb2_digest_extend(&dc, mock_buffer, sizeof(mock_buffer)),
"digest_extend, HW enabled");
TEST_SUCC(vb2_digest_finalize(&dc, mock_hash.raw, VB2_SHA1_DIGEST_SIZE),
"digest_finalize, HW enabled ");
TEST_SUCC(memcmp(mock_hash.sha1, mock_sha1, sizeof(mock_sha1)),
" got the right hash");
reset_common_data(HWCRYPTO_OK);
TEST_SUCC(vb2_hash_calculate(true, mock_buffer, sizeof(mock_buffer),
VB2_HASH_SHA1, &mock_hash),
"hash_calculate, HW enabled");
TEST_SUCC(memcmp(mock_hash.sha1, mock_sha1, sizeof(mock_sha1)),
" got the right hash");
TEST_EQ(mock_hash.algo, VB2_HASH_SHA1, " algo set");
reset_common_data(HWCRYPTO_ERROR);
TEST_EQ(vb2_hash_calculate(true, mock_buffer, sizeof(mock_buffer),
VB2_HASH_SHA1, &mock_hash),
VB2_ERROR_MOCK, "hash_calculate, HW error");
reset_common_data(HWCRYPTO_NOTSUPPORTED);
TEST_SUCC(vb2_hash_calculate(true, mock_buffer, sizeof(mock_buffer),
VB2_HASH_SHA1, &mock_hash),
"hash_calculate, HW unsupported");
TEST_SUCC(memcmp(mock_hash.sha1, mock_sha1, sizeof(mock_sha1)),
" got the right hash");
reset_common_data(HWCRYPTO_OK);
memcpy(mock_hash.sha1, mock_sha1, sizeof(mock_sha1));
mock_hash.algo = VB2_HASH_SHA1;
TEST_SUCC(vb2_hash_verify(true, mock_buffer, sizeof(mock_buffer),
&mock_hash), "hash_verify, HW enabled");
memcpy(mock_hash.sha1, mock_sha1, sizeof(mock_sha1));
mock_hash.sha1[5] = 0xfe;
mock_hash.algo = VB2_HASH_SHA1;
TEST_EQ(vb2_hash_verify(true, mock_buffer, sizeof(mock_buffer),
&mock_hash), VB2_ERROR_SHA_MISMATCH,
"hash_verify HW mismatch");
}
int main(int argc, char *argv[])
{
TEST_EQ(sizeof(mock_hash),
offsetof(struct vb2_hash, raw) + VB2_SHA512_DIGEST_SIZE,
"tests run with all SHA algorithms enabled");
vb2_hash_cbfs_compatibility_test();
vb2_hash_calculate_tests();
vb2_hash_verify_tests();
vb2_hash_hwcrypto_tests();
return gTestSuccess ? 0 : 255;
}
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