1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
|
/*
* Copyright (C) 2018 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "check.h"
#include <iomanip>
#include <sstream>
#include <android-base/logging.h>
#include <application.h>
#include <app_nugget.h>
#include <nos/debug.h>
#include <nos/transport.h>
/* TPM Register magic commands */
#define RD4_TPM_DID_VID 0x83d40f00
#define WR1_TPM_FW_VER 0x00d40f90
namespace android {
namespace citadeld {
namespace {
bool CheckDatagram(nos_device* const dev) {
int rv;
uint8_t buf[4];
const uint8_t expected_tpm_did_vid[] = { 0xe0, 0x1a, 0x28, 0x00 };
static_assert(sizeof(buf) >= sizeof(expected_tpm_did_vid),
"buf not large enough");
// Clear the version string pointer
LOG(INFO) << "Check: simple write";
buf[0] = 0x00;
rv = dev->ops.write(dev->ctx, WR1_TPM_FW_VER, buf, 1);
if (rv != 0) {
LOG(ERROR) << " Failed with 0x" << std::hex << rv << " (" << std::dec << rv << ")";
return false;
}
LOG(INFO) << " Passed";
// Read TPM_DID_VID
LOG(INFO) << "Check: simple read";
uint32_t buflen = sizeof(expected_tpm_did_vid);
memset(buf, 0, buflen);
rv = dev->ops.read(dev->ctx, RD4_TPM_DID_VID, buf, buflen);
if (rv != 0) {
LOG(ERROR) << " Failed with 0x" << std::hex << rv << " (" << std::dec << rv << ")";
return false;
} else {
std::ostringstream ss;
ss << "got:" << std::setfill('0') << std::setw(2) << std::hex;
for (uint32_t i = 0; i < buflen; ++i) {
ss << " " << buf[i];
}
LOG(DEBUG) << ss.str();
if (memcmp(buf, expected_tpm_did_vid, sizeof(expected_tpm_did_vid))) {
LOG(ERROR) << " Returned unexpected values";
return false;
}
}
LOG(INFO) << " Passed";
return true;
}
bool CheckTransport(nos_device* const dev) {
LOG(INFO) << "Check: get version string";
uint8_t buf[520];
uint32_t replycount = sizeof(buf);
uint32_t retval = nos_call_application(dev, APP_ID_NUGGET, NUGGET_PARAM_VERSION,
buf, 0,
buf, &replycount);
if (retval != 0) {
LOG(ERROR) << " Failed with 0x" << std::hex << retval
<< " (" << nos::StatusCodeString(retval) << ")";
return false;
}
if (replycount < 4 || replycount > 512) {
LOG(ERROR) << " Returned " << replycount << " bytes, which seems wrong";
return false;
}
LOG(INFO) << " Passed";
return true;
}
} // namespace
bool CheckDevice(nos_device* const dev)
{
if (dev == nullptr) {
LOG(ERROR) << "Checks require non-null device";
return false;
}
bool all_passed = true;
LOG(INFO) << "----";
LOG(INFO) << "Datagram checks begin...";
if (!CheckDatagram(dev)) {
LOG(ERROR) << "Datagram checks failed";
all_passed = false;
} else {
LOG(INFO) << "Datagram checks passed";
}
LOG(INFO) << "----";
LOG(INFO) << "Transport checks begin...";
if (!CheckTransport(dev)) {
LOG(ERROR) << "Transport checks failed";
all_passed = false;
} else {
LOG(INFO) << "Transport checks passed";
}
// TODO: add more e.g. GPIO
LOG(INFO) << "----";
return all_passed;
}
} // namespace citadeld
} // namespace android
|
