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package containerd
import (
"context"
"crypto/tls"
"errors"
"net"
"net/http"
"os"
"strings"
"syscall"
"github.com/containerd/containerd/remotes"
"github.com/containerd/containerd/remotes/docker"
"github.com/containerd/containerd/version"
cerrdefs "github.com/containerd/errdefs"
"github.com/containerd/log"
"github.com/distribution/reference"
registrytypes "github.com/docker/docker/api/types/registry"
"github.com/docker/docker/dockerversion"
"github.com/docker/docker/pkg/useragent"
"github.com/docker/docker/registry"
)
func (i *ImageService) newResolverFromAuthConfig(ctx context.Context, authConfig *registrytypes.AuthConfig, ref reference.Named) (remotes.Resolver, docker.StatusTracker) {
tracker := docker.NewInMemoryTracker()
hosts := hostsWrapper(i.registryHosts, authConfig, ref, i.registryService)
headers := http.Header{}
headers.Set("User-Agent", dockerversion.DockerUserAgent(ctx, useragent.VersionInfo{Name: "containerd-client", Version: version.Version}, useragent.VersionInfo{Name: "storage-driver", Version: i.snapshotter}))
return docker.NewResolver(docker.ResolverOptions{
Hosts: hosts,
Tracker: tracker,
Headers: headers,
}), tracker
}
func hostsWrapper(hostsFn docker.RegistryHosts, optAuthConfig *registrytypes.AuthConfig, ref reference.Named, regService registryResolver) docker.RegistryHosts {
var authorizer docker.Authorizer
if optAuthConfig != nil {
authorizer = authorizerFromAuthConfig(*optAuthConfig, ref)
}
return func(n string) ([]docker.RegistryHost, error) {
hosts, err := hostsFn(n)
if err != nil {
return nil, err
}
for i := range hosts {
if hosts[i].Authorizer == nil {
hosts[i].Authorizer = authorizer
isInsecure := regService.IsInsecureRegistry(hosts[i].Host)
if hosts[i].Client.Transport != nil && isInsecure {
hosts[i].Client.Transport = httpFallback{super: hosts[i].Client.Transport}
}
}
}
return hosts, nil
}
}
func authorizerFromAuthConfig(authConfig registrytypes.AuthConfig, ref reference.Named) docker.Authorizer {
cfgHost := registry.ConvertToHostname(authConfig.ServerAddress)
if cfgHost == "" {
cfgHost = reference.Domain(ref)
}
if cfgHost == registry.IndexHostname || cfgHost == registry.IndexName {
cfgHost = registry.DefaultRegistryHost
}
if authConfig.RegistryToken != "" {
return &bearerAuthorizer{
host: cfgHost,
bearer: authConfig.RegistryToken,
}
}
return docker.NewDockerAuthorizer(docker.WithAuthCreds(func(host string) (string, string, error) {
if cfgHost != host {
log.G(context.TODO()).WithFields(log.Fields{
"host": host,
"cfgHost": cfgHost,
}).Warn("Host doesn't match")
return "", "", nil
}
if authConfig.IdentityToken != "" {
return "", authConfig.IdentityToken, nil
}
return authConfig.Username, authConfig.Password, nil
}))
}
type bearerAuthorizer struct {
host string
bearer string
}
func (a *bearerAuthorizer) Authorize(ctx context.Context, req *http.Request) error {
if req.Host != a.host {
log.G(ctx).WithFields(log.Fields{
"host": req.Host,
"cfgHost": a.host,
}).Warn("Host doesn't match for bearer token")
return nil
}
req.Header.Set("Authorization", "Bearer "+a.bearer)
return nil
}
func (a *bearerAuthorizer) AddResponses(context.Context, []*http.Response) error {
// Return not implemented to prevent retry of the request when bearer did not succeed
return cerrdefs.ErrNotImplemented
}
type httpFallback struct {
super http.RoundTripper
}
func (f httpFallback) RoundTrip(r *http.Request) (*http.Response, error) {
resp, err := f.super.RoundTrip(r)
if err != nil && (isTLSError(err) || isPortError(err, r.URL.Host)) {
plainHttpUrl := *r.URL
plainHttpUrl.Scheme = "http"
plainHttpRequest := *r
plainHttpRequest.URL = &plainHttpUrl
return http.DefaultTransport.RoundTrip(&plainHttpRequest)
}
return resp, err
}
func isTLSError(err error) bool {
var tlsErr tls.RecordHeaderError
if errors.As(err, &tlsErr) && string(tlsErr.RecordHeader[:]) == "HTTP/" {
// server gave HTTP response to HTTPS client
return true
}
if strings.Contains(err.Error(), "TLS handshake timeout") {
return true
}
return false
}
func isPortError(err error, host string) bool {
if errors.Is(err, syscall.ECONNREFUSED) || os.IsTimeout(err) {
if _, port, _ := net.SplitHostPort(host); port != "" {
// Port is specified, will not retry on different port with scheme change
return false
}
return true
}
return false
}
|
