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19a41188cd50b5cdcd6fc50b718031a3d469c025
OpenCellular/tests/vb20_api_kernel_tests.c
Randall Spangler 6e3931d1f6 vboot: Add vb2_unpack_key_buffer 
Previously, vb2_unpack_key() actually unpacked a key buffer.  Callers
that had a vb2_packed_key had to typecast it back to a uint8_t buffer to
unpack it.  Rename vb2_unpack_key() to vb2_unpack_key_buffer(), and make
vb2_unpack_key() unpack a vb2_packed_key.

BUG=chromium:611535
BRANCH=none
TEST=make runtests; emerge-kevin coreboot depthcharge;
     emerge-samus and boot it

Change-Id: I9ee38a819c59cc58a72ead78cf5ddf3d0f301ae7
Signed-off-by: Randall Spangler <rspangler@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/400906
Reviewed-by: Daisuke Nojiri <dnojiri@chromium.org>
2016-11-06 02:34:03 +00:00

447 lines
14 KiB
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/* Copyright 2015 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 kernel verification library, api layer
*/
#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 "vb2_common.h"
#include "test_common.h"
/* Common context for tests */
static uint8_t workbuf[VB2_KERNEL_WORKBUF_RECOMMENDED_SIZE]
__attribute__ ((aligned (VB2_WORKBUF_ALIGN)));
static struct vb2_workbuf wb;
static struct vb2_context cc;
static struct vb2_shared_data *sd;
static struct vb2_fw_preamble *fwpre;
static struct vb2_kernel_preamble *kpre;
static struct vb2_packed_key *kdkey;
static const char fw_kernel_key_data[36] = "Test kernel key data";
static char kernel_data[0x4008] = "Sure it's a kernel...";
/* Mocked function data */
static struct {
struct vb2_gbb_header h;
struct vb2_packed_key recovery_key;
char recovery_key_data[32];
} mock_gbb;
static int mock_read_res_fail_on_call;
static int mock_unpack_key_retval;
static int mock_read_gbb_header_retval;
static int mock_load_kernel_keyblock_retval;
static int mock_load_kernel_preamble_retval;
/* Type of test to reset for */
enum reset_type {
FOR_PHASE1,
FOR_PHASE2,
FOR_PHASE3,
};
static void reset_common_data(enum reset_type t)
{
struct vb2_packed_key *k;
memset(workbuf, 0xaa, sizeof(workbuf));
memset(&cc, 0, sizeof(cc));
cc.workbuf = workbuf;
cc.workbuf_size = sizeof(workbuf);
vb2_workbuf_from_ctx(&cc, &wb);
vb2_init_context(&cc);
sd = vb2_get_sd(&cc);
vb2_nv_init(&cc);
vb2_secdatak_create(&cc);
vb2_secdatak_init(&cc);
vb2_secdatak_set(&cc, VB2_SECDATAK_VERSIONS, 0x20002);
mock_read_res_fail_on_call = 0;
mock_unpack_key_retval = VB2_SUCCESS;
mock_read_gbb_header_retval = VB2_SUCCESS;
mock_load_kernel_keyblock_retval = VB2_SUCCESS;
mock_load_kernel_preamble_retval = VB2_SUCCESS;
/* Recovery key in mock GBB */
mock_gbb.recovery_key.algorithm = 11;
mock_gbb.recovery_key.key_offset =
vb2_offset_of(&mock_gbb.recovery_key,
&mock_gbb.recovery_key_data);
mock_gbb.recovery_key.key_size = sizeof(mock_gbb.recovery_key_data);
strcpy(mock_gbb.recovery_key_data, "The recovery key");
mock_gbb.h.recovery_key_offset =
vb2_offset_of(&mock_gbb, &mock_gbb.recovery_key);
mock_gbb.h.recovery_key_size =
mock_gbb.recovery_key.key_offset +
mock_gbb.recovery_key.key_size;
if (t == FOR_PHASE1) {
uint8_t *kdata;
/* Create mock firmware preamble in the context */
sd->workbuf_preamble_offset = cc.workbuf_used;
fwpre = (struct vb2_fw_preamble *)
(cc.workbuf + sd->workbuf_preamble_offset);
k = &fwpre->kernel_subkey;
kdata = (uint8_t *)fwpre + sizeof(*fwpre);
memcpy(kdata, fw_kernel_key_data, sizeof(fw_kernel_key_data));
k->algorithm = 7;
k->key_offset = vb2_offset_of(k, kdata);
k->key_size = sizeof(fw_kernel_key_data);
sd->workbuf_preamble_size = sizeof(*fwpre) + k->key_size;
cc.workbuf_used += sd->workbuf_preamble_size;
} else if (t == FOR_PHASE2) {
struct vb2_signature *sig;
struct vb2_digest_context dc;
uint8_t *sdata;
/* Create mock kernel data key */
sd->workbuf_data_key_offset = cc.workbuf_used;
kdkey = (struct vb2_packed_key *)
(cc.workbuf + sd->workbuf_data_key_offset);
kdkey->algorithm = VB2_ALG_RSA2048_SHA256;
sd->workbuf_data_key_size = sizeof(*kdkey);
cc.workbuf_used += sd->workbuf_data_key_size;
/* Create mock kernel preamble in the context */
sd->workbuf_preamble_offset = cc.workbuf_used;
kpre = (struct vb2_kernel_preamble *)
(cc.workbuf + sd->workbuf_preamble_offset);
sdata = (uint8_t *)kpre + sizeof(*kpre);
sig = &kpre->body_signature;
sig->data_size = sizeof(kernel_data);
sig->sig_offset = vb2_offset_of(sig, sdata);
sig->sig_size = VB2_SHA512_DIGEST_SIZE;
vb2_digest_init(&dc, VB2_HASH_SHA256);
vb2_digest_extend(&dc, (const uint8_t *)kernel_data,
sizeof(kernel_data));
vb2_digest_finalize(&dc, sdata, sig->sig_size);
sd->workbuf_preamble_size = sizeof(*kpre) + sig->sig_size;
sd->vblock_preamble_offset =
0x10000 - sd->workbuf_preamble_size;
cc.workbuf_used += sd->workbuf_preamble_size;
} else {
/* Set flags and versions for roll-forward */
sd->kernel_version = 0x20004;
sd->kernel_version_secdatak = 0x20002;
sd->flags |= VB2_SD_FLAG_KERNEL_SIGNED;
cc.flags |= VB2_CONTEXT_ALLOW_KERNEL_ROLL_FORWARD;
}
};
/* Mocked functions */
int vb2ex_read_resource(struct vb2_context *ctx,
enum vb2_resource_index index,
uint32_t offset,
void *buf,
uint32_t size)
{
uint8_t *rptr;
uint32_t rsize;
if (--mock_read_res_fail_on_call == 0)
return VB2_ERROR_MOCK;
switch(index) {
case VB2_RES_GBB:
rptr = (uint8_t *)&mock_gbb;
rsize = sizeof(mock_gbb);
break;
default:
return VB2_ERROR_EX_READ_RESOURCE_INDEX;
}
if (offset > rsize || offset + size > rsize)
return VB2_ERROR_EX_READ_RESOURCE_SIZE;
memcpy(buf, rptr + offset, size);
return VB2_SUCCESS;
}
int vb2_read_gbb_header(struct vb2_context *ctx, struct vb2_gbb_header *gbb)
{
memcpy(gbb, &mock_gbb.h, sizeof(*gbb));
return mock_read_gbb_header_retval;
}
int vb2_load_kernel_keyblock(struct vb2_context *ctx)
{
return mock_load_kernel_keyblock_retval;
}
int vb2_load_kernel_preamble(struct vb2_context *ctx)
{
return mock_load_kernel_preamble_retval;
}
int vb2_unpack_key_buffer(struct vb2_public_key *key,
const uint8_t *buf,
uint32_t size)
{
const struct vb2_packed_key *k = (const struct vb2_packed_key *)buf;
key->arrsize = 0;
key->hash_alg = vb2_crypto_to_hash(k->algorithm);
return mock_unpack_key_retval;
}
int vb2_verify_digest(const struct vb2_public_key *key,
struct vb2_signature *sig,
const uint8_t *digest,
const struct vb2_workbuf *wb)
{
if (memcmp(digest, (uint8_t *)sig + sig->sig_offset, sig->sig_size))
return VB2_ERROR_VDATA_VERIFY_DIGEST;
return VB2_SUCCESS;
}
/* Tests */
static void phase1_tests(void)
{
struct vb2_packed_key *k;
uint32_t old_preamble_offset;
/* Test successful call */
reset_common_data(FOR_PHASE1);
old_preamble_offset = sd->workbuf_preamble_offset;
TEST_SUCC(vb2api_kernel_phase1(&cc), "phase1 good");
TEST_EQ(sd->workbuf_preamble_size, 0, " no more fw preamble");
/* Make sure normal key was loaded */
TEST_EQ(sd->workbuf_kernel_key_offset, old_preamble_offset,
" workbuf key offset");
k = (struct vb2_packed_key *)
(cc.workbuf + sd->workbuf_kernel_key_offset);
TEST_EQ(sd->workbuf_kernel_key_size, k->key_offset + k->key_size,
" workbuf key size");
TEST_EQ(cc.workbuf_used, sd->workbuf_kernel_key_offset +
sd->workbuf_kernel_key_size, " workbuf used");
TEST_EQ(k->algorithm, 7, " key algorithm");
TEST_EQ(k->key_size, sizeof(fw_kernel_key_data), " key_size");
TEST_EQ(memcmp((uint8_t *)k + k->key_offset, fw_kernel_key_data,
k->key_size), 0, " key data");
TEST_EQ(sd->kernel_version_secdatak, 0x20002, " secdatak version");
/* Test successful call in recovery mode */
reset_common_data(FOR_PHASE1);
cc.flags |= VB2_CONTEXT_RECOVERY_MODE;
/* No preamble loaded in recovery mode */
cc.workbuf_used = old_preamble_offset = sd->workbuf_preamble_offset;
sd->workbuf_preamble_offset = sd->workbuf_preamble_size = 0;
TEST_SUCC(vb2api_kernel_phase1(&cc), "phase1 rec good");
TEST_EQ(sd->workbuf_preamble_size, 0, "no more fw preamble");
/* Make sure recovery key was loaded */
TEST_EQ(sd->workbuf_kernel_key_offset, old_preamble_offset,
" workbuf key offset");
k = (struct vb2_packed_key *)
(cc.workbuf + sd->workbuf_kernel_key_offset);
TEST_EQ(sd->workbuf_kernel_key_size, k->key_offset + k->key_size,
" workbuf key size");
TEST_EQ(cc.workbuf_used, sd->workbuf_kernel_key_offset +
sd->workbuf_kernel_key_size, " workbuf used");
TEST_EQ(k->algorithm, 11, " key algorithm");
TEST_EQ(k->key_size, sizeof(mock_gbb.recovery_key_data), " key_size");
TEST_EQ(memcmp((uint8_t *)k + k->key_offset,
mock_gbb.recovery_key_data, k->key_size), 0,
" key data");
TEST_EQ(sd->kernel_version_secdatak, 0x20002, " secdatak version");
/* Bad secdatak causes failure in normal mode only */
reset_common_data(FOR_PHASE1);
cc.secdatak[0] ^= 0x33;
TEST_EQ(vb2api_kernel_phase1(&cc), VB2_ERROR_SECDATAK_CRC,
"phase1 bad secdata");
reset_common_data(FOR_PHASE1);
cc.secdatak[0] ^= 0x33;
cc.flags |= VB2_CONTEXT_RECOVERY_MODE;
TEST_SUCC(vb2api_kernel_phase1(&cc), "phase1 bad secdata rec");
TEST_EQ(sd->kernel_version_secdatak, 0, " secdatak version");
/* Failures while reading recovery key */
reset_common_data(FOR_PHASE1);
cc.flags |= VB2_CONTEXT_RECOVERY_MODE;
cc.workbuf_used = cc.workbuf_size - sizeof(struct vb2_gbb_header) + 1;
TEST_EQ(vb2api_kernel_phase1(&cc), VB2_ERROR_GBB_WORKBUF,
"phase1 rec workbuf gbb header");
reset_common_data(FOR_PHASE1);
cc.flags |= VB2_CONTEXT_RECOVERY_MODE;
mock_read_gbb_header_retval = VB2_ERROR_MOCK;
TEST_EQ(vb2api_kernel_phase1(&cc), VB2_ERROR_MOCK,
"phase1 rec gbb read header");
reset_common_data(FOR_PHASE1);
cc.flags |= VB2_CONTEXT_RECOVERY_MODE;
mock_gbb.h.recovery_key_size = cc.workbuf_size - 1;
TEST_EQ(vb2api_kernel_phase1(&cc), VB2_ERROR_API_KPHASE1_WORKBUF_REC_KEY,
"phase1 rec workbuf key");
reset_common_data(FOR_PHASE1);
cc.flags |= VB2_CONTEXT_RECOVERY_MODE;
mock_read_res_fail_on_call = 1;
TEST_EQ(vb2api_kernel_phase1(&cc), VB2_ERROR_MOCK,
"phase1 rec gbb read key");
/* Failures while parsing subkey from firmware preamble */
reset_common_data(FOR_PHASE1);
sd->workbuf_preamble_size = 0;
TEST_EQ(vb2api_kernel_phase1(&cc), VB2_ERROR_API_KPHASE1_PREAMBLE,
"phase1 fw preamble");
}
static void load_kernel_vblock_tests(void)
{
reset_common_data(FOR_PHASE1);
TEST_SUCC(vb2api_load_kernel_vblock(&cc), "load vblock good");
reset_common_data(FOR_PHASE1);
mock_load_kernel_keyblock_retval = VB2_ERROR_MOCK;
TEST_EQ(vb2api_load_kernel_vblock(&cc), VB2_ERROR_MOCK,
"load vblock bad keyblock");
reset_common_data(FOR_PHASE1);
mock_load_kernel_preamble_retval = VB2_ERROR_MOCK;
TEST_EQ(vb2api_load_kernel_vblock(&cc), VB2_ERROR_MOCK,
"load vblock bad preamble");
}
static void get_kernel_size_tests(void)
{
uint32_t offs, size;
reset_common_data(FOR_PHASE2);
offs = size = 0;
TEST_SUCC(vb2api_get_kernel_size(&cc, &offs, &size), "get size good");
TEST_EQ(offs, 0x10000, " offset");
TEST_EQ(size, sizeof(kernel_data), " size");
/* Don't need to pass pointers */
reset_common_data(FOR_PHASE2);
TEST_SUCC(vb2api_get_kernel_size(&cc, NULL, NULL), "get size null");
reset_common_data(FOR_PHASE2);
sd->workbuf_preamble_size = 0;
TEST_EQ(vb2api_get_kernel_size(&cc, &offs, &size),
VB2_ERROR_API_GET_KERNEL_SIZE_PREAMBLE,
"get size no preamble");
}
static void verify_kernel_data_tests(void)
{
reset_common_data(FOR_PHASE2);
TEST_SUCC(vb2api_verify_kernel_data(&cc, kernel_data, sizeof(kernel_data)),
"verify data good");
reset_common_data(FOR_PHASE2);
sd->workbuf_preamble_size = 0;
TEST_EQ(vb2api_verify_kernel_data(&cc, kernel_data, sizeof(kernel_data)),
VB2_ERROR_API_VERIFY_KDATA_PREAMBLE, "verify no preamble");
reset_common_data(FOR_PHASE2);
TEST_EQ(vb2api_verify_kernel_data(&cc, kernel_data, sizeof(kernel_data) + 1),
VB2_ERROR_API_VERIFY_KDATA_SIZE, "verify size");
reset_common_data(FOR_PHASE2);
cc.workbuf_used = cc.workbuf_size - sizeof(struct vb2_digest_context) + 1;
TEST_EQ(vb2api_verify_kernel_data(&cc, kernel_data, sizeof(kernel_data)),
VB2_ERROR_API_VERIFY_KDATA_WORKBUF, "verify workbuf");
reset_common_data(FOR_PHASE2);
sd->workbuf_data_key_size = 0;
TEST_EQ(vb2api_verify_kernel_data(&cc, kernel_data, sizeof(kernel_data)),
VB2_ERROR_API_VERIFY_KDATA_KEY, "verify no key");
reset_common_data(FOR_PHASE2);
mock_unpack_key_retval = VB2_ERROR_MOCK;
TEST_EQ(vb2api_verify_kernel_data(&cc, kernel_data, sizeof(kernel_data)),
VB2_ERROR_MOCK, "verify unpack key");
reset_common_data(FOR_PHASE2);
kdkey->algorithm = VB2_ALG_COUNT;
TEST_EQ(vb2api_verify_kernel_data(&cc, kernel_data, sizeof(kernel_data)),
VB2_ERROR_SHA_INIT_ALGORITHM, "verify hash init");
reset_common_data(FOR_PHASE2);
cc.workbuf_used = cc.workbuf_size - sizeof(struct vb2_digest_context) - 4;
TEST_EQ(vb2api_verify_kernel_data(&cc, kernel_data, sizeof(kernel_data)),
VB2_ERROR_API_CHECK_HASH_WORKBUF_DIGEST, "verify hash workbuf");
reset_common_data(FOR_PHASE2);
kernel_data[3] ^= 0xd0;
TEST_EQ(vb2api_verify_kernel_data(&cc, kernel_data, sizeof(kernel_data)),
VB2_ERROR_VDATA_VERIFY_DIGEST, "verify hash digest");
kernel_data[3] ^= 0xd0;
}
static void phase3_tests(void)
{
uint32_t v;
reset_common_data(FOR_PHASE3);
TEST_SUCC(vb2api_kernel_phase3(&cc), "phase3 good");
vb2_secdatak_get(&cc, VB2_SECDATAK_VERSIONS, &v);
TEST_EQ(v, 0x20004, " version");
reset_common_data(FOR_PHASE3);
sd->kernel_version = 0x20001;
TEST_SUCC(vb2api_kernel_phase3(&cc), "phase3 no rollback");
vb2_secdatak_get(&cc, VB2_SECDATAK_VERSIONS, &v);
TEST_EQ(v, 0x20002, " version");
reset_common_data(FOR_PHASE3);
sd->flags &= ~VB2_SD_FLAG_KERNEL_SIGNED;
TEST_SUCC(vb2api_kernel_phase3(&cc), "phase3 unsigned kernel");
vb2_secdatak_get(&cc, VB2_SECDATAK_VERSIONS, &v);
TEST_EQ(v, 0x20002, " version");
reset_common_data(FOR_PHASE3);
cc.flags |= VB2_CONTEXT_RECOVERY_MODE;
TEST_SUCC(vb2api_kernel_phase3(&cc), "phase3 recovery");
vb2_secdatak_get(&cc, VB2_SECDATAK_VERSIONS, &v);
TEST_EQ(v, 0x20002, " version");
reset_common_data(FOR_PHASE3);
cc.flags &= ~VB2_CONTEXT_ALLOW_KERNEL_ROLL_FORWARD;
TEST_SUCC(vb2api_kernel_phase3(&cc), "phase3 no rollforward");
vb2_secdatak_get(&cc, VB2_SECDATAK_VERSIONS, &v);
TEST_EQ(v, 0x20002, " version");
reset_common_data(FOR_PHASE3);
sd->status &= ~VB2_SD_STATUS_SECDATAK_INIT;
TEST_EQ(vb2api_kernel_phase3(&cc),
VB2_ERROR_SECDATAK_SET_UNINITIALIZED, "phase3 set fail");
}
int main(int argc, char* argv[])
{
phase1_tests();
load_kernel_vblock_tests();
get_kernel_size_tests();
verify_kernel_data_tests();
phase3_tests();
return gTestSuccess ? 0 : 255;
}
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