/
main.go
193 lines (162 loc) · 3.63 KB
/
main.go
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
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
package vault
import (
"context"
"strings"
"github.com/aws/aws-sdk-go-v2/aws"
"github.com/aws/aws-sdk-go-v2/config"
"github.com/aws/aws-sdk-go-v2/feature/s3/manager"
"github.com/aws/aws-sdk-go-v2/service/s3"
"github.com/aws/aws-sdk-go-v2/service/sts"
)
// Path describes a specific object in the vault
type Path struct {
Key string
User string
Public bool
Bucket string
}
// Query describes a key to find in a vault
type Query struct {
Key string
Public bool
Bucket string
}
var category = map[bool]string{
true: "public",
false: "private",
}
func lookupUser(given string) (string, error) {
if given != "" {
return given, nil
}
c, err := ah.GetStsClient()
if err != nil {
return "", err
}
resp, err := c.GetCallerIdentity(context.TODO(), &sts.GetCallerIdentityInput{})
if err != nil {
return "", err
}
parts := strings.Split(*resp.Arn, "/")
return parts[len(parts)-1], nil
}
// Read returns the value for a Path
func Read(p Path) (string, error) {
c, err := ah.GetS3Client()
if err != nil {
return "", err
}
user, err := lookupUser(p.User)
if err != nil {
return "", err
}
key := category[p.Public] + "/" + user + "/" + p.Key
writer := manager.NewWriteAtBuffer([]byte{})
downloader := manager.NewDownloader(c)
_, err = downloader.Download(context.TODO(), writer, &s3.GetObjectInput{
Bucket: &p.Bucket,
Key: &key,
})
if err != nil {
return "", err
}
return string(writer.Bytes()), nil
}
// Write sets the value for a Path
func Write(p Path, data string) error {
c, err := ah.GetS3Client()
if err != nil {
return err
}
user, err := lookupUser(p.User)
if err != nil {
return err
}
key := category[p.Public] + "/" + user + "/" + p.Key
uploader := manager.NewUploader(c)
_, err = uploader.Upload(context.TODO(), &s3.PutObjectInput{
Bucket: &p.Bucket,
Key: &key,
Body: strings.NewReader(data),
})
return err
}
// Delete removes the value for a Path
func Delete(p Path) error {
c, err := ah.GetS3Client()
if err != nil {
return err
}
user, err := lookupUser(p.User)
if err != nil {
return err
}
key := category[p.Public] + "/" + user + "/" + p.Key
_, err = c.DeleteObject(context.TODO(), &s3.DeleteObjectInput{
Bucket: &p.Bucket,
Key: &key,
})
return err
}
// Search returns a list of users that match a Query
func Search(q Query) ([]string, error) {
c, err := ah.GetS3Client()
if err != nil {
return []string{}, err
}
prefix := category[q.Public] + "/"
paginator := s3.NewListObjectsV2Paginator(c, &s3.ListObjectsV2Input{
Bucket: &q.Bucket,
Prefix: &prefix,
})
users := []string{}
for paginator.HasMorePages() {
page, err := paginator.NextPage(context.TODO())
if err != nil {
return []string{}, err
}
for _, obj := range page.Contents {
parts := strings.SplitN(*obj.Key, "/", 3)
if parts[2] == q.Key {
users = append(users, parts[1])
}
}
}
return users, nil
}
type awsHelper struct {
config *aws.Config
s3Client *s3.Client
stsClient *sts.Client
}
func (a *awsHelper) getConfig() (*aws.Config, error) {
if a.config == nil {
cfg, err := config.LoadDefaultConfig(context.TODO())
if err != nil {
return nil, err
}
a.config = &cfg
}
return a.config, nil
}
func (a *awsHelper) GetS3Client() (*s3.Client, error) {
if a.s3Client == nil {
cfg, err := a.getConfig()
if err != nil {
return nil, err
}
a.s3Client = s3.NewFromConfig(*cfg)
}
return a.s3Client, nil
}
func (a *awsHelper) GetStsClient() (*sts.Client, error) {
if a.stsClient == nil {
cfg, err := a.getConfig()
if err != nil {
return nil, err
}
a.stsClient = sts.NewFromConfig(*cfg)
}
return a.stsClient, nil
}
var ah = awsHelper{}