/
credentials.go
148 lines (134 loc) · 4.31 KB
/
credentials.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
// Copyright 2016 Canonical Ltd.
// Licensed under the AGPLv3, see LICENCE file for details.
package ec2
import (
"fmt"
"path/filepath"
"github.com/aws/aws-sdk-go-v2/config"
"github.com/juju/errors"
"github.com/juju/utils/v3"
"gopkg.in/ini.v1"
"github.com/juju/juju/cloud"
"github.com/juju/juju/environs"
)
type environProviderCredentials struct{}
// AuthTypes returns all of the AuthTypes supported by the ec2 environ
// credentials provider.
func (e environProviderCredentials) AuthTypes() cloud.AuthTypes {
credSchemas := e.CredentialSchemas()
at := make(cloud.AuthTypes, 0, len(credSchemas))
for k := range credSchemas {
at = append(at, k)
}
return at
}
// CredentialSchemas is part of the environs.ProviderCredentials interface.
func (environProviderCredentials) CredentialSchemas() map[cloud.AuthType]cloud.CredentialSchema {
return map[cloud.AuthType]cloud.CredentialSchema{
cloud.AccessKeyAuthType: {
{
"access-key",
cloud.CredentialAttr{
Description: "The EC2 access key",
},
}, {
"secret-key",
cloud.CredentialAttr{
Description: "The EC2 secret key",
Hidden: true,
},
},
},
cloud.InstanceRoleAuthType: {
{
"instance-profile-name",
cloud.CredentialAttr{
Description: "The AWS Instance Profile name",
},
},
},
}
}
// DetectCredentials is part of the environs.ProviderCredentials interface.
func (e environProviderCredentials) DetectCredentials(cloudName string) (*cloud.CloudCredential, error) {
dir := credentialsDir()
credsFile := filepath.Join(dir, "credentials")
credInfo, err := ini.LooseLoad(credsFile)
if err != nil {
return nil, errors.Annotate(err, "loading AWS credentials file")
}
credInfo.NameMapper = ini.TitleUnderscore
// There's always a section called "DEFAULT" for top level items.
if len(credInfo.Sections()) == 1 {
// No standard AWS credentials so try environment variables.
return e.detectEnvCredentials()
}
type accessKeyValues struct {
AwsAccessKeyId string
AwsSecretAccessKey string
}
result := cloud.CloudCredential{
AuthCredentials: make(map[string]cloud.Credential),
}
for _, credName := range credInfo.SectionStrings() {
if credName == ini.DefaultSection {
// No credentials at top level.
continue
}
values := new(accessKeyValues)
if err := credInfo.Section(credName).MapTo(values); err != nil {
return nil, errors.Annotatef(err, "invalid credential attributes in section %q", credName)
}
// Basic validation check
if values.AwsAccessKeyId == "" || values.AwsSecretAccessKey == "" {
logger.Errorf("missing aws credential attributes in credentials file section %q", credName)
continue
}
accessKeyCredential := cloud.NewCredential(
cloud.AccessKeyAuthType,
map[string]string{
"access-key": values.AwsAccessKeyId,
"secret-key": values.AwsSecretAccessKey,
},
)
accessKeyCredential.Label = fmt.Sprintf("aws credential %q", credName)
result.AuthCredentials[credName] = accessKeyCredential
}
// See if there's also a default region defined.
configFile := filepath.Join(dir, "config")
configInfo, err := ini.LooseLoad(configFile)
if err != nil {
return nil, errors.Annotate(err, "loading AWS config file")
}
result.DefaultRegion = configInfo.Section("default").Key("region").String()
return &result, nil
}
func credentialsDir() string {
return filepath.Join(utils.Home(), ".aws")
}
func (environProviderCredentials) detectEnvCredentials() (*cloud.CloudCredential, error) {
cfg, err := config.NewEnvConfig()
if err != nil || cfg.Credentials.AccessKeyID == "" {
return nil, errors.NewNotFound(err, "credentials not found")
}
accessKeyCredential := cloud.NewCredential(
cloud.AccessKeyAuthType,
map[string]string{
"access-key": cfg.Credentials.AccessKeyID,
"secret-key": cfg.Credentials.SecretAccessKey,
},
)
user, err := utils.LocalUsername()
if err != nil {
return nil, errors.Trace(err)
}
accessKeyCredential.Label = fmt.Sprintf("aws credential %q", user)
return &cloud.CloudCredential{
AuthCredentials: map[string]cloud.Credential{
user: accessKeyCredential,
}}, nil
}
// FinalizeCredential is part of the environs.ProviderCredentials interface.
func (environProviderCredentials) FinalizeCredential(_ environs.FinalizeCredentialContext, args environs.FinalizeCredentialParams) (*cloud.Credential, error) {
return &args.Credential, nil
}