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379 lines
10 KiB
379 lines
10 KiB
/* Copyright (c) 2014 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*
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* Tests for misc library
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*/
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#include <stdio.h>
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#include "2sysincludes.h"
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#include "2api.h"
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#include "2common.h"
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#include "2misc.h"
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#include "2nvstorage.h"
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#include "2secdata.h"
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#include "vb2_common.h"
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#include "test_common.h"
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/* Common context for tests */
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static uint8_t workbuf[VB2_WORKBUF_RECOMMENDED_SIZE]
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__attribute__ ((aligned (VB2_WORKBUF_ALIGN)));
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static struct vb2_context cc;
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static struct vb2_shared_data *sd;
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/* Mocked function data */
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static struct {
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struct vb2_gbb_header h;
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struct vb2_packed_key rootkey;
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char rootkey_data[32];
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} mock_gbb;
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static struct {
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/* Keyblock */
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struct {
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struct vb2_keyblock kb;
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char data_key_data[16];
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uint8_t kbdata[128];
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} k;
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/* Preamble follows keyblock */
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struct {
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struct vb2_fw_preamble pre;
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uint8_t predata[128];
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} p;
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} mock_vblock;
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static int mock_read_res_fail_on_call;
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static int mock_unpack_key_retval;
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static int mock_verify_keyblock_retval;
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static int mock_verify_preamble_retval;
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/* Type of test to reset for */
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enum reset_type {
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FOR_KEYBLOCK,
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FOR_PREAMBLE
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};
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static void reset_common_data(enum reset_type t)
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{
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struct vb2_keyblock *kb = &mock_vblock.k.kb;
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struct vb2_fw_preamble *pre = &mock_vblock.p.pre;
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memset(workbuf, 0xaa, sizeof(workbuf));
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memset(&cc, 0, sizeof(cc));
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cc.workbuf = workbuf;
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cc.workbuf_size = sizeof(workbuf);
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vb2_init_context(&cc);
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sd = vb2_get_sd(&cc);
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vb2_nv_init(&cc);
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vb2_secdata_create(&cc);
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vb2_secdata_init(&cc);
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mock_read_res_fail_on_call = 0;
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mock_unpack_key_retval = VB2_SUCCESS;
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mock_verify_keyblock_retval = VB2_SUCCESS;
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mock_verify_preamble_retval = VB2_SUCCESS;
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/* Set up mock data for verifying keyblock */
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sd->fw_version_secdata = 0x20002;
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vb2_secdata_set(&cc, VB2_SECDATA_VERSIONS, sd->fw_version_secdata);
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sd->gbb_rootkey_offset = vb2_offset_of(&mock_gbb, &mock_gbb.rootkey);
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sd->gbb_rootkey_size = sizeof(mock_gbb.rootkey_data);
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sd->last_fw_result = VB2_FW_RESULT_SUCCESS;
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mock_gbb.rootkey.algorithm = 11;
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mock_gbb.rootkey.key_offset =
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vb2_offset_of(&mock_gbb.rootkey,
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&mock_gbb.rootkey_data);
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mock_gbb.rootkey.key_size = sizeof(mock_gbb.rootkey_data);
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kb->keyblock_size = sizeof(mock_vblock.k);
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kb->data_key.algorithm = 7;
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kb->data_key.key_version = 2;
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kb->data_key.key_offset =
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vb2_offset_of(&mock_vblock.k, &mock_vblock.k.data_key_data) -
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vb2_offset_of(&mock_vblock.k, &kb->data_key);
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kb->data_key.key_size = sizeof(mock_vblock.k.data_key_data);
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strcpy(mock_vblock.k.data_key_data, "data key data!!");
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pre->preamble_size = sizeof(mock_vblock.p);
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pre->firmware_version = 2;
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/* If verifying preamble, verify keyblock first to set up data key */
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if (t == FOR_PREAMBLE)
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vb2_load_fw_keyblock(&cc);
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};
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/* Mocked functions */
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int vb2ex_read_resource(struct vb2_context *ctx,
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enum vb2_resource_index index,
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uint32_t offset,
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void *buf,
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uint32_t size)
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{
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uint8_t *rptr;
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uint32_t rsize;
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if (--mock_read_res_fail_on_call == 0)
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return VB2_ERROR_EX_READ_RESOURCE_INDEX;
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switch(index) {
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case VB2_RES_GBB:
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rptr = (uint8_t *)&mock_gbb;
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rsize = sizeof(mock_gbb);
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break;
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case VB2_RES_FW_VBLOCK:
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rptr = (uint8_t *)&mock_vblock;
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rsize = sizeof(mock_vblock);
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break;
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default:
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return VB2_ERROR_EX_READ_RESOURCE_INDEX;
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}
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if (offset > rsize || offset + size > rsize)
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return VB2_ERROR_EX_READ_RESOURCE_SIZE;
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memcpy(buf, rptr + offset, size);
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return VB2_SUCCESS;
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}
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int vb2_unpack_key(struct vb2_public_key *key,
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const uint8_t *buf,
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uint32_t size)
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{
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return mock_unpack_key_retval;
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}
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int vb2_verify_keyblock(struct vb2_keyblock *block,
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uint32_t size,
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const struct vb2_public_key *key,
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const struct vb2_workbuf *wb)
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{
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return mock_verify_keyblock_retval;
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}
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int vb2_verify_fw_preamble(struct vb2_fw_preamble *preamble,
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uint32_t size,
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const struct vb2_public_key *key,
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const struct vb2_workbuf *wb)
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{
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return mock_verify_preamble_retval;
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}
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/* Tests */
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static void verify_keyblock_tests(void)
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{
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struct vb2_keyblock *kb = &mock_vblock.k.kb;
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struct vb2_packed_key *k;
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int wb_used_before;
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/* Test successful call */
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reset_common_data(FOR_KEYBLOCK);
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wb_used_before = cc.workbuf_used;
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TEST_SUCC(vb2_load_fw_keyblock(&cc), "keyblock verify");
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TEST_EQ(sd->fw_version, 0x20000, "keyblock version");
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TEST_EQ(sd->vblock_preamble_offset, sizeof(mock_vblock.k),
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"preamble offset");
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TEST_EQ(sd->workbuf_data_key_offset,
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(wb_used_before + (VB2_WORKBUF_ALIGN - 1)) &
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~(VB2_WORKBUF_ALIGN - 1),
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"keyblock data key offset");
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TEST_EQ(cc.workbuf_used,
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sd->workbuf_data_key_offset + sd->workbuf_data_key_size,
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"workbuf used");
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/* Make sure data key was properly saved */
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k = (struct vb2_packed_key *)(cc.workbuf + sd->workbuf_data_key_offset);
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TEST_EQ(k->algorithm, 7, "data key algorithm");
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TEST_EQ(k->key_version, 2, "data key version");
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TEST_EQ(k->key_size, sizeof(mock_vblock.k.data_key_data),
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"data key size");
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TEST_EQ(memcmp(cc.workbuf + sd->workbuf_data_key_offset +
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k->key_offset, mock_vblock.k.data_key_data,
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sizeof(mock_vblock.k.data_key_data)),
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0, "data key data");
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TEST_EQ(cc.workbuf_used,
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sd->workbuf_data_key_offset + sd->workbuf_data_key_size,
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"workbuf used after");
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/* Test failures */
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reset_common_data(FOR_KEYBLOCK);
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cc.workbuf_used = cc.workbuf_size - sd->gbb_rootkey_size + 8;
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TEST_EQ(vb2_load_fw_keyblock(&cc),
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VB2_ERROR_FW_KEYBLOCK_WORKBUF_ROOT_KEY,
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"keyblock not enough workbuf for root key");
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reset_common_data(FOR_KEYBLOCK);
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sd->gbb_rootkey_size = sizeof(mock_gbb);
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TEST_EQ(vb2_load_fw_keyblock(&cc),
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VB2_ERROR_EX_READ_RESOURCE_SIZE,
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"keyblock read root key");
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reset_common_data(FOR_KEYBLOCK);
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mock_unpack_key_retval = VB2_ERROR_UNPACK_KEY_SIG_ALGORITHM;
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TEST_EQ(vb2_load_fw_keyblock(&cc),
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VB2_ERROR_UNPACK_KEY_SIG_ALGORITHM,
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"keyblock unpack root key");
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reset_common_data(FOR_KEYBLOCK);
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cc.workbuf_used = cc.workbuf_size - sd->gbb_rootkey_size - 8;
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TEST_EQ(vb2_load_fw_keyblock(&cc),
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VB2_ERROR_FW_KEYBLOCK_WORKBUF_HEADER,
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"keyblock not enough workbuf for header");
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reset_common_data(FOR_KEYBLOCK);
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mock_read_res_fail_on_call = 2;
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TEST_EQ(vb2_load_fw_keyblock(&cc),
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VB2_ERROR_EX_READ_RESOURCE_INDEX,
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"keyblock read keyblock header");
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reset_common_data(FOR_KEYBLOCK);
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cc.workbuf_used = cc.workbuf_size - sd->gbb_rootkey_size
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- sizeof(struct vb2_keyblock);
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TEST_EQ(vb2_load_fw_keyblock(&cc),
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VB2_ERROR_FW_KEYBLOCK_WORKBUF,
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"keyblock not enough workbuf for entire keyblock");
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reset_common_data(FOR_KEYBLOCK);
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kb->keyblock_size = sizeof(mock_vblock) + 1;
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TEST_EQ(vb2_load_fw_keyblock(&cc),
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VB2_ERROR_EX_READ_RESOURCE_SIZE,
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"keyblock read keyblock");
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reset_common_data(FOR_KEYBLOCK);
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mock_verify_keyblock_retval = VB2_ERROR_KEYBLOCK_MAGIC;
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TEST_EQ(vb2_load_fw_keyblock(&cc),
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VB2_ERROR_KEYBLOCK_MAGIC,
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"keyblock verify keyblock");
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reset_common_data(FOR_KEYBLOCK);
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kb->data_key.key_version = 0x10000;
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TEST_EQ(vb2_load_fw_keyblock(&cc),
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VB2_ERROR_FW_KEYBLOCK_VERSION_RANGE,
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"keyblock version range");
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reset_common_data(FOR_KEYBLOCK);
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kb->data_key.key_version = 1;
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TEST_EQ(vb2_load_fw_keyblock(&cc),
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VB2_ERROR_FW_KEYBLOCK_VERSION_ROLLBACK,
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"keyblock rollback");
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}
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static void verify_preamble_tests(void)
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{
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struct vb2_fw_preamble *pre = &mock_vblock.p.pre;
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int wb_used_before;
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uint32_t v;
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/* Test successful call */
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reset_common_data(FOR_PREAMBLE);
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wb_used_before = cc.workbuf_used;
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TEST_SUCC(vb2_load_fw_preamble(&cc), "preamble good");
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TEST_EQ(sd->fw_version, 0x20002, "combined version");
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TEST_EQ(sd->workbuf_preamble_offset,
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(wb_used_before + (VB2_WORKBUF_ALIGN - 1)) &
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~(VB2_WORKBUF_ALIGN - 1),
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"preamble offset");
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TEST_EQ(sd->workbuf_preamble_size, pre->preamble_size, "preamble size");
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TEST_EQ(cc.workbuf_used,
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sd->workbuf_preamble_offset + sd->workbuf_preamble_size,
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"workbuf used");
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/* Expected failures */
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reset_common_data(FOR_PREAMBLE);
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sd->workbuf_data_key_size = 0;
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TEST_EQ(vb2_load_fw_preamble(&cc),
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VB2_ERROR_FW_PREAMBLE2_DATA_KEY,
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"preamble no data key");
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reset_common_data(FOR_PREAMBLE);
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mock_unpack_key_retval = VB2_ERROR_UNPACK_KEY_HASH_ALGORITHM;
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TEST_EQ(vb2_load_fw_preamble(&cc),
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VB2_ERROR_UNPACK_KEY_HASH_ALGORITHM,
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"preamble unpack data key");
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reset_common_data(FOR_PREAMBLE);
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cc.workbuf_used = cc.workbuf_size - sizeof(struct vb2_fw_preamble) + 8;
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TEST_EQ(vb2_load_fw_preamble(&cc),
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VB2_ERROR_FW_PREAMBLE2_WORKBUF_HEADER,
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"preamble not enough workbuf for header");
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reset_common_data(FOR_PREAMBLE);
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sd->vblock_preamble_offset = sizeof(mock_vblock);
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TEST_EQ(vb2_load_fw_preamble(&cc),
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VB2_ERROR_EX_READ_RESOURCE_SIZE,
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"preamble read header");
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reset_common_data(FOR_PREAMBLE);
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cc.workbuf_used = cc.workbuf_size - sizeof(mock_vblock.p) + 8;
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TEST_EQ(vb2_load_fw_preamble(&cc),
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VB2_ERROR_FW_PREAMBLE2_WORKBUF,
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"preamble not enough workbuf");
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reset_common_data(FOR_PREAMBLE);
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pre->preamble_size = sizeof(mock_vblock);
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TEST_EQ(vb2_load_fw_preamble(&cc),
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VB2_ERROR_EX_READ_RESOURCE_SIZE,
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"preamble read full");
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reset_common_data(FOR_PREAMBLE);
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mock_verify_preamble_retval = VB2_ERROR_PREAMBLE_SIG_INVALID;
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TEST_EQ(vb2_load_fw_preamble(&cc),
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VB2_ERROR_PREAMBLE_SIG_INVALID,
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"preamble verify");
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reset_common_data(FOR_PREAMBLE);
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pre->firmware_version = 0x10000;
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TEST_EQ(vb2_load_fw_preamble(&cc),
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VB2_ERROR_FW_PREAMBLE_VERSION_RANGE,
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"preamble version range");
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reset_common_data(FOR_PREAMBLE);
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pre->firmware_version = 1;
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TEST_EQ(vb2_load_fw_preamble(&cc),
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VB2_ERROR_FW_PREAMBLE_VERSION_ROLLBACK,
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"preamble version rollback");
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reset_common_data(FOR_PREAMBLE);
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pre->firmware_version = 3;
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TEST_SUCC(vb2_load_fw_preamble(&cc),
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"preamble version roll forward");
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vb2_secdata_get(&cc, VB2_SECDATA_VERSIONS, &v);
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TEST_EQ(v, 0x20003, "roll forward");
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/* Newer version without result success doesn't roll forward */
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reset_common_data(FOR_PREAMBLE);
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pre->firmware_version = 3;
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sd->last_fw_result = VB2_FW_RESULT_UNKNOWN;
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TEST_SUCC(vb2_load_fw_preamble(&cc),
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"preamble version no roll forward 1");
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vb2_secdata_get(&cc, VB2_SECDATA_VERSIONS, &v);
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TEST_EQ(v, 0x20002, "no roll forward");
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/* Newer version with success but for other slot doesn't roll forward */
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reset_common_data(FOR_PREAMBLE);
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pre->firmware_version = 3;
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sd->last_fw_slot = 1;
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TEST_SUCC(vb2_load_fw_preamble(&cc),
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"preamble version no roll forward 2");
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vb2_secdata_get(&cc, VB2_SECDATA_VERSIONS, &v);
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TEST_EQ(v, 0x20002, "no roll forward");
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}
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int main(int argc, char* argv[])
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{
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verify_keyblock_tests();
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verify_preamble_tests();
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return gTestSuccess ? 0 : 255;
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}
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