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
194
195
196
197
198
199
200
201
202
203
204
205
|
// Copyright 2020 Google LLC All Rights Reserved.
//
// 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 cmd
import (
"encoding/json"
"errors"
"fmt"
"io"
"log"
"os"
"strings"
"github.com/docker/cli/cli/config"
"github.com/docker/cli/cli/config/types"
"github.com/google/go-containerregistry/pkg/authn"
"github.com/google/go-containerregistry/pkg/crane"
"github.com/google/go-containerregistry/pkg/name"
"github.com/spf13/cobra"
)
// NewCmdAuth creates a new cobra.Command for the auth subcommand.
func NewCmdAuth(options []crane.Option, argv ...string) *cobra.Command {
cmd := &cobra.Command{
Use: "auth",
Short: "Log in or access credentials",
Args: cobra.NoArgs,
RunE: func(cmd *cobra.Command, _ []string) error { return cmd.Usage() },
}
cmd.AddCommand(NewCmdAuthGet(options, argv...), NewCmdAuthLogin(argv...))
return cmd
}
type credentials struct {
Username string
Secret string
}
// https://github.com/docker/cli/blob/2291f610ae73533e6e0749d4ef1e360149b1e46b/cli/config/credentials/native_store.go#L100-L109
func toCreds(config *authn.AuthConfig) credentials {
creds := credentials{
Username: config.Username,
Secret: config.Password,
}
if config.IdentityToken != "" {
creds.Username = "<token>"
creds.Secret = config.IdentityToken
}
return creds
}
// NewCmdAuthGet creates a new `crane auth get` command.
func NewCmdAuthGet(options []crane.Option, argv ...string) *cobra.Command {
if len(argv) == 0 {
argv = []string{os.Args[0]}
}
baseCmd := strings.Join(argv, " ")
eg := fmt.Sprintf(` # Read configured credentials for reg.example.com
$ echo "reg.example.com" | %s get
{"username":"AzureDiamond","password":"hunter2"}
# or
$ %s get reg.example.com
{"username":"AzureDiamond","password":"hunter2"}`, baseCmd, baseCmd)
return &cobra.Command{
Use: "get [REGISTRY_ADDR]",
Short: "Implements a credential helper",
Example: eg,
Args: cobra.MaximumNArgs(1),
RunE: func(_ *cobra.Command, args []string) error {
registryAddr := ""
if len(args) == 1 {
registryAddr = args[0]
} else {
b, err := io.ReadAll(os.Stdin)
if err != nil {
return err
}
registryAddr = strings.TrimSpace(string(b))
}
reg, err := name.NewRegistry(registryAddr)
if err != nil {
return err
}
authorizer, err := crane.GetOptions(options...).Keychain.Resolve(reg)
if err != nil {
return err
}
// If we don't find any credentials, there's a magic error to return:
//
// https://github.com/docker/docker-credential-helpers/blob/f78081d1f7fef6ad74ad6b79368de6348386e591/credentials/error.go#L4-L6
// https://github.com/docker/docker-credential-helpers/blob/f78081d1f7fef6ad74ad6b79368de6348386e591/credentials/credentials.go#L61-L63
if authorizer == authn.Anonymous {
fmt.Fprint(os.Stdout, "credentials not found in native keychain\n")
os.Exit(1)
}
auth, err := authorizer.Authorization()
if err != nil {
return err
}
// Convert back to a form that credential helpers can parse so that this
// can act as a meta credential helper.
creds := toCreds(auth)
return json.NewEncoder(os.Stdout).Encode(creds)
},
}
}
// NewCmdAuthLogin creates a new `crane auth login` command.
func NewCmdAuthLogin(argv ...string) *cobra.Command {
var opts loginOptions
if len(argv) == 0 {
argv = []string{os.Args[0]}
}
eg := fmt.Sprintf(` # Log in to reg.example.com
%s login reg.example.com -u AzureDiamond -p hunter2`, strings.Join(argv, " "))
cmd := &cobra.Command{
Use: "login [OPTIONS] [SERVER]",
Short: "Log in to a registry",
Example: eg,
Args: cobra.ExactArgs(1),
RunE: func(cmd *cobra.Command, args []string) error {
reg, err := name.NewRegistry(args[0])
if err != nil {
return err
}
opts.serverAddress = reg.Name()
return login(opts)
},
}
flags := cmd.Flags()
flags.StringVarP(&opts.user, "username", "u", "", "Username")
flags.StringVarP(&opts.password, "password", "p", "", "Password")
flags.BoolVarP(&opts.passwordStdin, "password-stdin", "", false, "Take the password from stdin")
return cmd
}
type loginOptions struct {
serverAddress string
user string
password string
passwordStdin bool
}
func login(opts loginOptions) error {
if opts.passwordStdin {
contents, err := io.ReadAll(os.Stdin)
if err != nil {
return err
}
opts.password = strings.TrimSuffix(string(contents), "\n")
opts.password = strings.TrimSuffix(opts.password, "\r")
}
if opts.user == "" && opts.password == "" {
return errors.New("username and password required")
}
cf, err := config.Load(os.Getenv("DOCKER_CONFIG"))
if err != nil {
return err
}
creds := cf.GetCredentialsStore(opts.serverAddress)
if opts.serverAddress == name.DefaultRegistry {
opts.serverAddress = authn.DefaultAuthKey
}
if err := creds.Store(types.AuthConfig{
ServerAddress: opts.serverAddress,
Username: opts.user,
Password: opts.password,
}); err != nil {
return err
}
if err := cf.Save(); err != nil {
return err
}
log.Printf("logged in via %s", cf.Filename)
return nil
}
|
