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a063a43ad776c9831051e62565c0136ce36d0b09
OpenCellular/tests/vb2_api_tests.c
Randall Spangler a063a43ad7 vboot2: pass const work buffers, and clarify min_offset output 
When a work buffer is passed to a function, and duplicated inside that
function, allocations made against the duplicate are automatically
freed when the duplicate goes out of scope.  Make that explicit in the
comments.  And pass in const struct workbuf * instead of struct
workbuf *, to make it clear that the passed-in work buffer pointer is
not being altered by the function.

Also, comment that the value of min_offset becomes undefined if
vb2_verify_common_member() or vb2_verify_common_subobject() fails.

BUG=chromium:423882
BRANCH=none
TEST=VBOOT2=1 make runtests

Change-Id: Icc6010e6ef786f78cd2176a59d4d0e6e14905a11
Signed-off-by: Randall Spangler <rspangler@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/227524
Reviewed-by: Bill Richardson <wfrichar@chromium.org>
2014-11-06 02:28:16 +00:00

460 lines
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/* Copyright (c) 2014 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 misc library
*/
#include <stdio.h>
#include "2sysincludes.h"
#include "2api.h"
#include "2common.h"
#include "2misc.h"
#include "2nvstorage.h"
#include "2rsa.h"
#include "2secdata.h"
#include "test_common.h"
/* Common context for tests */
static uint8_t workbuf[VB2_WORKBUF_RECOMMENDED_SIZE]
__attribute__ ((aligned (16)));
static struct vb2_context cc;
static struct vb2_shared_data *sd;
const char mock_body[320] = "Mock body";
const int mock_body_size = sizeof(mock_body);
const int mock_algorithm = VB2_ALG_RSA2048_SHA256;
const int mock_hash_alg = VB2_HASH_SHA256;
const int mock_sig_size = 64;
/* Mocked function data */
static int retval_vb2_fw_parse_gbb;
static int retval_vb2_check_dev_switch;
static int retval_vb2_check_tpm_clear;
static int retval_vb2_select_fw_slot;
static int retval_vb2_load_fw_keyblock;
static int retval_vb2_load_fw_preamble;
static int retval_vb2_digest_finalize;
static int retval_vb2_verify_digest;
/* Type of test to reset for */
enum reset_type {
FOR_MISC,
FOR_EXTEND_HASH,
FOR_CHECK_HASH,
};
static void reset_common_data(enum reset_type t)
{
struct vb2_fw_preamble *pre;
struct vb2_packed_key *k;
memset(workbuf, 0xaa, sizeof(workbuf));
memset(&cc, 0, sizeof(cc));
cc.workbuf = workbuf;
cc.workbuf_size = sizeof(workbuf);
vb2_init_context(&cc);
sd = vb2_get_sd(&cc);
vb2_nv_init(&cc);
vb2_secdata_create(&cc);
vb2_secdata_init(&cc);
retval_vb2_fw_parse_gbb = VB2_SUCCESS;
retval_vb2_check_dev_switch = VB2_SUCCESS;
retval_vb2_check_tpm_clear = VB2_SUCCESS;
retval_vb2_select_fw_slot = VB2_SUCCESS;
retval_vb2_load_fw_keyblock = VB2_SUCCESS;
retval_vb2_load_fw_preamble = VB2_SUCCESS;
retval_vb2_digest_finalize = VB2_SUCCESS;
retval_vb2_verify_digest = VB2_SUCCESS;
sd->workbuf_preamble_offset = 8;
sd->workbuf_preamble_size = sizeof(*pre);
cc.workbuf_used = sd->workbuf_preamble_offset
+ sd->workbuf_preamble_size;
pre = (struct vb2_fw_preamble *)
(cc.workbuf + sd->workbuf_preamble_offset);
pre->body_signature.data_size = mock_body_size;
pre->body_signature.sig_size = mock_sig_size;
sd->workbuf_data_key_offset = cc.workbuf_used;
sd->workbuf_data_key_size = sizeof(*k) + 8;
cc.workbuf_used = sd->workbuf_data_key_offset +
sd->workbuf_data_key_size;
k = (struct vb2_packed_key *)
(cc.workbuf + sd->workbuf_data_key_offset);
k->algorithm = mock_algorithm;
if (t == FOR_EXTEND_HASH || t == FOR_CHECK_HASH)
vb2api_init_hash(&cc, VB2_HASH_TAG_FW_BODY, NULL);
if (t == FOR_CHECK_HASH)
vb2api_extend_hash(&cc, mock_body, mock_body_size);
};
/* Mocked functions */
int vb2_fw_parse_gbb(struct vb2_context *ctx)
{
return retval_vb2_fw_parse_gbb;
}
int vb2_check_dev_switch(struct vb2_context *ctx)
{
return retval_vb2_check_dev_switch;
}
int vb2_check_tpm_clear(struct vb2_context *ctx)
{
return retval_vb2_check_tpm_clear;
}
int vb2_select_fw_slot(struct vb2_context *ctx)
{
return retval_vb2_select_fw_slot;
}
int vb2_load_fw_keyblock(struct vb2_context *ctx)
{
return retval_vb2_load_fw_keyblock;
}
int vb2_load_fw_preamble(struct vb2_context *ctx)
{
return retval_vb2_load_fw_preamble;
}
int vb2_unpack_key(struct vb2_public_key *key,
const uint8_t *buf,
uint32_t size)
{
struct vb2_packed_key *k = (struct vb2_packed_key *)buf;
if (size != sizeof(*k) + 8)
return VB2_ERROR_UNPACK_KEY_SIZE;
key->sig_alg = vb2_crypto_to_signature(k->algorithm);
key->hash_alg = vb2_crypto_to_hash(k->algorithm);
return VB2_SUCCESS;
}
int vb2_digest_init(struct vb2_digest_context *dc,
enum vb2_hash_algorithm hash_alg)
{
if (hash_alg != mock_hash_alg)
return VB2_ERROR_SHA_INIT_ALGORITHM;
dc->hash_alg = hash_alg;
return VB2_SUCCESS;
}
int vb2_digest_extend(struct vb2_digest_context *dc,
const uint8_t *buf,
uint32_t size)
{
if (dc->hash_alg != mock_hash_alg)
return VB2_ERROR_SHA_EXTEND_ALGORITHM;
return VB2_SUCCESS;
}
int vb2_digest_finalize(struct vb2_digest_context *dc,
uint8_t *digest,
uint32_t digest_size)
{
return retval_vb2_digest_finalize;
}
uint32_t vb2_rsa_sig_size(enum vb2_signature_algorithm sig_alg)
{
return mock_sig_size;
}
int vb2_rsa_verify_digest(const struct vb2_public_key *key,
uint8_t *sig,
const uint8_t *digest,
const struct vb2_workbuf *wb)
{
return retval_vb2_verify_digest;
}
/* Tests */
static void misc_tests(void)
{
/* Test secdata passthru functions */
reset_common_data(FOR_MISC);
/* Corrupt secdata so initial check will fail */
cc.secdata[0] ^= 0x42;
TEST_EQ(vb2api_secdata_check(&cc), VB2_ERROR_SECDATA_CRC,
"secdata check");
TEST_SUCC(vb2api_secdata_create(&cc), "secdata create");
TEST_SUCC(vb2api_secdata_check(&cc), "secdata check 2");
/* Test fail passthru */
reset_common_data(FOR_MISC);
vb2api_fail(&cc, 12, 34);
TEST_EQ(vb2_nv_get(&cc, VB2_NV_RECOVERY_REQUEST),
12, "vb2api_fail request");
TEST_EQ(vb2_nv_get(&cc, VB2_NV_RECOVERY_SUBCODE),
34, "vb2api_fail subcode");
}
static void phase1_tests(void)
{
reset_common_data(FOR_MISC);
TEST_SUCC(vb2api_fw_phase1(&cc), "phase1 good");
TEST_EQ(sd->recovery_reason, 0, " not recovery");
TEST_EQ(cc.flags & VB2_CONTEXT_RECOVERY_MODE, 0, " recovery flag");
TEST_EQ(cc.flags & VB2_CONTEXT_CLEAR_RAM, 0, " clear ram flag");
reset_common_data(FOR_MISC);
retval_vb2_fw_parse_gbb = VB2_ERROR_GBB_MAGIC;
TEST_EQ(vb2api_fw_phase1(&cc), VB2_ERROR_API_PHASE1_RECOVERY,
"phase1 gbb");
TEST_EQ(sd->recovery_reason, VB2_RECOVERY_GBB_HEADER,
" recovery reason");
TEST_NEQ(cc.flags & VB2_CONTEXT_RECOVERY_MODE, 0, " recovery flag");
TEST_NEQ(cc.flags & VB2_CONTEXT_CLEAR_RAM, 0, " clear ram flag");
reset_common_data(FOR_MISC);
retval_vb2_check_dev_switch = VB2_ERROR_MOCK;
TEST_EQ(vb2api_fw_phase1(&cc), VB2_ERROR_API_PHASE1_RECOVERY,
"phase1 dev switch");
TEST_EQ(sd->recovery_reason, VB2_RECOVERY_DEV_SWITCH,
" recovery reason");
TEST_NEQ(cc.flags & VB2_CONTEXT_RECOVERY_MODE, 0, " recovery flag");
TEST_NEQ(cc.flags & VB2_CONTEXT_CLEAR_RAM, 0, " clear ram flag");
reset_common_data(FOR_MISC);
cc.secdata[0] ^= 0x42;
TEST_EQ(vb2api_fw_phase1(&cc), VB2_ERROR_API_PHASE1_RECOVERY,
"phase1 secdata");
TEST_EQ(sd->recovery_reason, VB2_RECOVERY_SECDATA_INIT,
" recovery reason");
TEST_NEQ(cc.flags & VB2_CONTEXT_RECOVERY_MODE, 0, " recovery flag");
TEST_NEQ(cc.flags & VB2_CONTEXT_CLEAR_RAM, 0, " clear ram flag");
}
static void phase2_tests(void)
{
reset_common_data(FOR_MISC);
TEST_SUCC(vb2api_fw_phase2(&cc), "phase2 good");
TEST_EQ(cc.flags & VB2_CONTEXT_CLEAR_RAM, 0, " clear ram flag");
reset_common_data(FOR_MISC);
cc.flags |= VB2_CONTEXT_DEVELOPER_MODE;
TEST_SUCC(vb2api_fw_phase2(&cc), "phase1 dev");
TEST_NEQ(cc.flags & VB2_CONTEXT_CLEAR_RAM, 0, " clear ram flag");
reset_common_data(FOR_MISC);
retval_vb2_check_tpm_clear = VB2_ERROR_MOCK;
TEST_EQ(vb2api_fw_phase2(&cc), VB2_ERROR_MOCK, "phase2 tpm clear");
TEST_EQ(vb2_nv_get(&cc, VB2_NV_RECOVERY_REQUEST),
VB2_RECOVERY_TPM_CLEAR_OWNER, " recovery reason");
reset_common_data(FOR_MISC);
retval_vb2_select_fw_slot = VB2_ERROR_MOCK;
TEST_EQ(vb2api_fw_phase2(&cc), VB2_ERROR_MOCK, "phase2 slot");
TEST_EQ(vb2_nv_get(&cc, VB2_NV_RECOVERY_REQUEST),
VB2_RECOVERY_FW_SLOT, " recovery reason");
}
static void phase3_tests(void)
{
reset_common_data(FOR_MISC);
TEST_SUCC(vb2api_fw_phase3(&cc), "phase3 good");
reset_common_data(FOR_MISC);
retval_vb2_load_fw_keyblock = VB2_ERROR_MOCK;
TEST_EQ(vb2api_fw_phase3(&cc), VB2_ERROR_MOCK, "phase3 keyblock");
TEST_EQ(vb2_nv_get(&cc, VB2_NV_RECOVERY_REQUEST),
VB2_RECOVERY_RO_INVALID_RW, " recovery reason");
reset_common_data(FOR_MISC);
retval_vb2_load_fw_preamble = VB2_ERROR_MOCK;
TEST_EQ(vb2api_fw_phase3(&cc), VB2_ERROR_MOCK, "phase3 keyblock");
TEST_EQ(vb2_nv_get(&cc, VB2_NV_RECOVERY_REQUEST),
VB2_RECOVERY_RO_INVALID_RW, " recovery reason");
}
static void init_hash_tests(void)
{
struct vb2_packed_key *k;
int wb_used_before;
uint32_t size;
/* For now, all we support is body signature hash */
reset_common_data(FOR_MISC);
wb_used_before = cc.workbuf_used;
TEST_SUCC(vb2api_init_hash(&cc, VB2_HASH_TAG_FW_BODY, &size),
"init hash good");
TEST_EQ(sd->workbuf_hash_offset,
(wb_used_before + (VB2_WORKBUF_ALIGN - 1)) &
~(VB2_WORKBUF_ALIGN - 1),
"hash context offset");
TEST_EQ(sd->workbuf_hash_size, sizeof(struct vb2_digest_context),
"hash context size");
TEST_EQ(cc.workbuf_used,
sd->workbuf_hash_offset + sd->workbuf_hash_size,
"hash uses workbuf");
TEST_EQ(sd->hash_tag, VB2_HASH_TAG_FW_BODY, "hash tag");
TEST_EQ(sd->hash_remaining_size, mock_body_size, "hash remaining");
wb_used_before = cc.workbuf_used;
TEST_SUCC(vb2api_init_hash(&cc, VB2_HASH_TAG_FW_BODY, NULL),
"init hash again");
TEST_EQ(cc.workbuf_used, wb_used_before, "init hash reuses context");
reset_common_data(FOR_MISC);
TEST_EQ(vb2api_init_hash(&cc, VB2_HASH_TAG_INVALID, &size),
VB2_ERROR_API_INIT_HASH_TAG, "init hash invalid tag");
reset_common_data(FOR_MISC);
sd->workbuf_preamble_size = 0;
TEST_EQ(vb2api_init_hash(&cc, VB2_HASH_TAG_FW_BODY, &size),
VB2_ERROR_API_INIT_HASH_PREAMBLE, "init hash preamble");
reset_common_data(FOR_MISC);
TEST_EQ(vb2api_init_hash(&cc, VB2_HASH_TAG_FW_BODY + 1, &size),
VB2_ERROR_API_INIT_HASH_TAG, "init hash unknown tag");
reset_common_data(FOR_MISC);
cc.workbuf_used =
cc.workbuf_size - sizeof(struct vb2_digest_context) + 8;
TEST_EQ(vb2api_init_hash(&cc, VB2_HASH_TAG_FW_BODY, &size),
VB2_ERROR_API_INIT_HASH_WORKBUF, "init hash workbuf");
reset_common_data(FOR_MISC);
sd->workbuf_data_key_size = 0;
TEST_EQ(vb2api_init_hash(&cc, VB2_HASH_TAG_FW_BODY, &size),
VB2_ERROR_API_INIT_HASH_DATA_KEY, "init hash data key");
reset_common_data(FOR_MISC);
sd->workbuf_data_key_size--;
TEST_EQ(vb2api_init_hash(&cc, VB2_HASH_TAG_FW_BODY, &size),
VB2_ERROR_UNPACK_KEY_SIZE, "init hash data key size");
reset_common_data(FOR_MISC);
k = (struct vb2_packed_key *)(cc.workbuf + sd->workbuf_data_key_offset);
k->algorithm--;
TEST_EQ(vb2api_init_hash(&cc, VB2_HASH_TAG_FW_BODY, &size),
VB2_ERROR_SHA_INIT_ALGORITHM, "init hash algorithm");
}
static void extend_hash_tests(void)
{
struct vb2_digest_context *dc;
reset_common_data(FOR_EXTEND_HASH);
TEST_SUCC(vb2api_extend_hash(&cc, mock_body, 32),
"hash extend good");
TEST_EQ(sd->hash_remaining_size, mock_body_size - 32,
"hash extend remaining");
TEST_SUCC(vb2api_extend_hash(&cc, mock_body, mock_body_size - 32),
"hash extend again");
TEST_EQ(sd->hash_remaining_size, 0, "hash extend remaining 2");
reset_common_data(FOR_EXTEND_HASH);
sd->workbuf_hash_size = 0;
TEST_EQ(vb2api_extend_hash(&cc, mock_body, mock_body_size),
VB2_ERROR_API_EXTEND_HASH_WORKBUF, "hash extend no workbuf");
reset_common_data(FOR_EXTEND_HASH);
TEST_EQ(vb2api_extend_hash(&cc, mock_body, mock_body_size + 1),
VB2_ERROR_API_EXTEND_HASH_SIZE, "hash extend too much");
reset_common_data(FOR_EXTEND_HASH);
TEST_EQ(vb2api_extend_hash(&cc, mock_body, 0),
VB2_ERROR_API_EXTEND_HASH_SIZE, "hash extend empty");
reset_common_data(FOR_EXTEND_HASH);
dc = (struct vb2_digest_context *)
(cc.workbuf + sd->workbuf_hash_offset);
dc->hash_alg = mock_hash_alg + 1;
TEST_EQ(vb2api_extend_hash(&cc, mock_body, mock_body_size),
VB2_ERROR_SHA_EXTEND_ALGORITHM, "hash extend fail");
}
static void check_hash_tests(void)
{
struct vb2_fw_preamble *pre;
reset_common_data(FOR_CHECK_HASH);
TEST_SUCC(vb2api_check_hash(&cc), "check hash good");
reset_common_data(FOR_CHECK_HASH);
sd->workbuf_preamble_size = 0;
TEST_EQ(vb2api_check_hash(&cc),
VB2_ERROR_API_CHECK_HASH_PREAMBLE, "check hash preamble");
reset_common_data(FOR_CHECK_HASH);
sd->workbuf_hash_size = 0;
TEST_EQ(vb2api_check_hash(&cc),
VB2_ERROR_API_CHECK_HASH_WORKBUF, "check hash no workbuf");
reset_common_data(FOR_CHECK_HASH);
sd->hash_remaining_size = 1;
TEST_EQ(vb2api_check_hash(&cc),
VB2_ERROR_API_CHECK_HASH_SIZE, "check hash size");
reset_common_data(FOR_CHECK_HASH);
cc.workbuf_used = cc.workbuf_size;
TEST_EQ(vb2api_check_hash(&cc),
VB2_ERROR_API_CHECK_HASH_WORKBUF_DIGEST, "check hash workbuf");
reset_common_data(FOR_CHECK_HASH);
retval_vb2_digest_finalize = VB2_ERROR_MOCK;
TEST_EQ(vb2api_check_hash(&cc), VB2_ERROR_MOCK, "check hash finalize");
reset_common_data(FOR_CHECK_HASH);
sd->hash_tag = VB2_HASH_TAG_INVALID;
TEST_EQ(vb2api_check_hash(&cc),
VB2_ERROR_API_CHECK_HASH_TAG, "check hash tag");
reset_common_data(FOR_CHECK_HASH);
sd->workbuf_data_key_size = 0;
TEST_EQ(vb2api_check_hash(&cc),
VB2_ERROR_API_CHECK_HASH_DATA_KEY, "check hash data key");
reset_common_data(FOR_CHECK_HASH);
sd->workbuf_data_key_size--;
TEST_EQ(vb2api_check_hash(&cc),
VB2_ERROR_UNPACK_KEY_SIZE, "check hash data key size");
reset_common_data(FOR_CHECK_HASH);
pre = (struct vb2_fw_preamble *)
(cc.workbuf + sd->workbuf_preamble_offset);
pre->body_signature.sig_size++;
TEST_EQ(vb2api_check_hash(&cc),
VB2_ERROR_VDATA_SIG_SIZE, "check hash sig size");
reset_common_data(FOR_CHECK_HASH);
retval_vb2_digest_finalize = VB2_ERROR_RSA_VERIFY_DIGEST;
TEST_EQ(vb2api_check_hash(&cc),
VB2_ERROR_RSA_VERIFY_DIGEST, "check hash finalize");
}
int main(int argc, char* argv[])
{
misc_tests();
phase1_tests();
phase2_tests();
phase3_tests();
init_hash_tests();
extend_hash_tests();
check_hash_tests();
return gTestSuccess ? 0 : 255;
}
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