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
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
|
// Copyright 2023 Google LLC
//
// 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.
// Package testing defines the mock tdx-guest device
package testing
import (
"fmt"
"strings"
labi "github.com/google/go-tdx-guest/client/linuxabi"
)
// GetReportResponse represents a mocked response to a command request.
type GetReportResponse struct {
Resp labi.TdxReportReq
EsResult labi.EsResult
}
// GetQuoteResponse represents a mocked response to a command request.
type GetQuoteResponse struct {
Resp labi.TdxQuoteHdr
EsResult labi.EsResult
}
// Device represents a fake tdx-guest device with pre-programmed responses.
type Device struct {
isOpen bool
reportResponse map[[labi.TdReportDataSize]byte]any
quoteResponse map[[labi.TdReportSize]byte]any
}
// Match returns true if both errors match expectations closely enough
func Match(got error, want string) bool {
if got == nil {
return want == ""
}
return strings.Contains(got.Error(), want)
}
// Open changes the mock device's state to open.
func (d *Device) Open(_ string) error {
if d.isOpen {
return fmt.Errorf("device is already open")
}
d.isOpen = true
return nil
}
// Close changes the mock device's state to close.
func (d *Device) Close() error {
if !d.isOpen {
return fmt.Errorf("device is already closed")
}
d.isOpen = false
return nil
}
func (d *Device) getReport(req *labi.TdxReportReq) (uintptr, error) {
tdReportRespI, ok := d.reportResponse[req.ReportData]
if !ok {
return 0, fmt.Errorf("test error: no response for %v", req.ReportData)
}
tdReportResp, ok := tdReportRespI.(*GetReportResponse)
if !ok {
return 0, fmt.Errorf("test error: incorrect response for %v", tdReportRespI)
}
esResult := uintptr(tdReportResp.EsResult)
req.TdReport = tdReportResp.Resp.TdReport
return esResult, nil
}
func (d *Device) getQuote(req *labi.TdxQuoteHdr) (uintptr, error) {
var report [labi.TdReportSize]byte
copy(report[:], req.Data[:labi.TdReportSize])
quoteRespI, ok := d.quoteResponse[report]
if !ok {
return 0, fmt.Errorf("test error: no response for %v", report)
}
quoteResp, ok := quoteRespI.(*GetQuoteResponse)
if !ok {
return 0, fmt.Errorf("test error: incorrect response for %v", quoteRespI)
}
esResult := uintptr(quoteResp.EsResult)
copy(req.Data[:], quoteResp.Resp.Data[:])
req.OutLen = quoteResp.Resp.OutLen
return esResult, nil
}
// Ioctl mocks commands with pre-specified responses for a finite number of requests.
func (d *Device) Ioctl(command uintptr, req any) (uintptr, error) {
switch sreq := req.(type) {
case *labi.TdxQuoteReq:
switch command {
case labi.IocTdxGetQuote:
return d.getQuote(sreq.Buffer.(*labi.TdxQuoteHdr))
default:
return 0, fmt.Errorf("unexpected request value: %v", req)
}
case *labi.TdxReportReq:
switch command {
case labi.IocTdxGetReport:
return d.getReport(sreq)
default:
return 0, fmt.Errorf("unexpected request value: %v", req)
}
}
return 0, fmt.Errorf("unexpected request value: %v", req)
}
// HTTPResponse represents structure for containing header and body
type HTTPResponse struct {
Header map[string][]string
Body []byte
}
// Getter represents a static server for request/respond url -> body contents.
type Getter struct {
Responses map[string]HTTPResponse
}
// Get returns a registered response for a given URL.
func (g *Getter) Get(url string) (map[string][]string, []byte, error) {
v, ok := g.Responses[url]
if !ok {
return nil, nil, fmt.Errorf("404: %s", url)
}
return v.Header, v.Body, nil
}
// TdxQuoteProvider represents a fake quote provider with pre-programmed responses.
type TdxQuoteProvider struct {
isSupported bool
rawQuoteResponse map[[labi.TdReportDataSize]byte][]uint8
}
// IsSupported checks if mock quote provider is supported.
func (p *TdxQuoteProvider) IsSupported() error {
if p.isSupported {
return nil
}
return fmt.Errorf("configfs not supported")
}
// GetRawQuote returns pre-programmed response as raw quote.
func (p *TdxQuoteProvider) GetRawQuote(reportData [64]byte) ([]uint8, error) {
return p.rawQuoteResponse[reportData], nil
}
|
