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
|
package imagetools
import (
"bytes"
"context"
"encoding/base64"
"encoding/json"
"io"
"net/http"
"github.com/containerd/containerd/remotes"
"github.com/containerd/containerd/remotes/docker"
"github.com/containerd/log"
"github.com/distribution/reference"
"github.com/docker/buildx/util/resolver"
clitypes "github.com/docker/cli/cli/config/types"
"github.com/moby/buildkit/util/contentutil"
"github.com/moby/buildkit/util/tracing"
ocispec "github.com/opencontainers/image-spec/specs-go/v1"
"github.com/sirupsen/logrus"
)
type Auth interface {
GetAuthConfig(registryHostname string) (clitypes.AuthConfig, error)
}
type Opt struct {
Auth Auth
RegistryConfig map[string]resolver.RegistryConfig
}
type Resolver struct {
auth docker.Authorizer
hosts docker.RegistryHosts
buffer contentutil.Buffer
}
func New(opt Opt) *Resolver {
return &Resolver{
auth: docker.NewDockerAuthorizer(docker.WithAuthCreds(toCredentialsFunc(opt.Auth)), docker.WithAuthClient(http.DefaultClient)),
hosts: resolver.NewRegistryConfig(opt.RegistryConfig),
buffer: contentutil.NewBuffer(),
}
}
func (r *Resolver) resolver() remotes.Resolver {
return docker.NewResolver(docker.ResolverOptions{
Hosts: func(domain string) ([]docker.RegistryHost, error) {
res, err := r.hosts(domain)
if err != nil {
return nil, err
}
for i := range res {
res[i].Authorizer = r.auth
res[i].Client = tracing.DefaultClient
}
return res, nil
},
})
}
func (r *Resolver) Resolve(ctx context.Context, in string) (string, ocispec.Descriptor, error) {
// discard containerd logger to avoid printing unnecessary info during image reference resolution.
// https://github.com/containerd/containerd/blob/1a88cf5242445657258e0c744def5017d7cfb492/remotes/docker/resolver.go#L288
logger := logrus.New()
logger.Out = io.Discard
ctx = log.WithLogger(ctx, logrus.NewEntry(logger))
ref, err := parseRef(in)
if err != nil {
return "", ocispec.Descriptor{}, err
}
in, desc, err := r.resolver().Resolve(ctx, ref.String())
if err != nil {
return "", ocispec.Descriptor{}, err
}
return in, desc, nil
}
func (r *Resolver) Get(ctx context.Context, in string) ([]byte, ocispec.Descriptor, error) {
in, desc, err := r.Resolve(ctx, in)
if err != nil {
return nil, ocispec.Descriptor{}, err
}
dt, err := r.GetDescriptor(ctx, in, desc)
if err != nil {
return nil, ocispec.Descriptor{}, err
}
return dt, desc, nil
}
func (r *Resolver) GetDescriptor(ctx context.Context, in string, desc ocispec.Descriptor) ([]byte, error) {
fetcher, err := r.resolver().Fetcher(ctx, in)
if err != nil {
return nil, err
}
rc, err := fetcher.Fetch(ctx, desc)
if err != nil {
return nil, err
}
buf := &bytes.Buffer{}
_, err = io.Copy(buf, rc)
rc.Close()
if err != nil {
return nil, err
}
return buf.Bytes(), nil
}
func parseRef(s string) (reference.Named, error) {
ref, err := reference.ParseNormalizedNamed(s)
if err != nil {
return nil, err
}
ref = reference.TagNameOnly(ref)
return ref, nil
}
func toCredentialsFunc(a Auth) func(string) (string, string, error) {
return func(host string) (string, string, error) {
if host == "registry-1.docker.io" {
host = "https://index.docker.io/v1/"
}
ac, err := a.GetAuthConfig(host)
if err != nil {
return "", "", err
}
if ac.IdentityToken != "" {
return "", ac.IdentityToken, nil
}
return ac.Username, ac.Password, nil
}
}
func RegistryAuthForRef(ref string, a Auth) (string, error) {
if a == nil {
return "", nil
}
r, err := parseRef(ref)
if err != nil {
return "", err
}
host := reference.Domain(r)
if host == "docker.io" {
host = "https://index.docker.io/v1/"
}
ac, err := a.GetAuthConfig(host)
if err != nil {
return "", err
}
buf, err := json.Marshal(ac)
if err != nil {
return "", err
}
return base64.URLEncoding.EncodeToString(buf), nil
}
|
