/
authprovider.go
302 lines (267 loc) · 8.14 KB
/
authprovider.go
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package authprovider
import (
"context"
"crypto/ed25519"
"crypto/hmac"
"crypto/sha256"
"crypto/tls"
"crypto/x509"
"fmt"
"os"
"runtime"
"strconv"
"strings"
"sync"
"time"
authutil "github.com/containerd/containerd/remotes/docker/auth"
remoteserrors "github.com/containerd/containerd/remotes/errors"
"github.com/docker/cli/cli/config"
"github.com/docker/cli/cli/config/configfile"
"github.com/docker/cli/cli/config/types"
http "github.com/hashicorp/go-cleanhttp"
"github.com/khulnasoft/devkit/session"
"github.com/khulnasoft/devkit/session/auth"
"github.com/khulnasoft/devkit/util/progress/progresswriter"
"github.com/pkg/errors"
"golang.org/x/crypto/nacl/sign"
"google.golang.org/grpc"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
)
const defaultExpiration = 60
const dockerHubConfigfileKey = "https://index.docker.io/v1/"
const dockerHubRegistryHost = "registry-1.docker.io"
func NewDockerAuthProvider(cfg *configfile.ConfigFile, tlsConfigs map[string]*AuthTLSConfig) session.Attachable {
return &authProvider{
authConfigCache: map[string]*types.AuthConfig{},
config: cfg,
seeds: &tokenSeeds{dir: config.Dir()},
loggerCache: map[string]struct{}{},
tlsConfigs: tlsConfigs,
}
}
type authProvider struct {
authConfigCache map[string]*types.AuthConfig
config *configfile.ConfigFile
seeds *tokenSeeds
logger progresswriter.Logger
loggerCache map[string]struct{}
tlsConfigs map[string]*AuthTLSConfig
// The need for this mutex is not well understood.
// Without it, the docker cli on OS X hangs when
// reading credentials from docker-credential-osxkeychain.
// See issue https://github.com/docker/cli/issues/1862
mu sync.Mutex
}
func (ap *authProvider) SetLogger(l progresswriter.Logger) {
ap.mu.Lock()
ap.logger = l
ap.mu.Unlock()
}
func (ap *authProvider) Register(server *grpc.Server) {
auth.RegisterAuthServer(server, ap)
}
func (ap *authProvider) FetchToken(ctx context.Context, req *auth.FetchTokenRequest) (rr *auth.FetchTokenResponse, err error) {
ac, err := ap.getAuthConfig(req.Host)
if err != nil {
return nil, err
}
// check for statically configured bearer token
if ac.RegistryToken != "" {
return toTokenResponse(ac.RegistryToken, time.Time{}, 0), nil
}
creds, err := ap.credentials(req.Host)
if err != nil {
return nil, err
}
to := authutil.TokenOptions{
Realm: req.Realm,
Service: req.Service,
Scopes: req.Scopes,
Username: creds.Username,
Secret: creds.Secret,
}
var httpClient = http.DefaultClient()
if tc, err := ap.tlsConfig(req.Host); err == nil && tc != nil {
transport := http.DefaultTransport()
transport.TLSClientConfig = tc
httpClient.Transport = transport
}
if creds.Secret != "" {
done := func(progresswriter.SubLogger) error {
return err
}
defer func() {
err = errors.Wrap(err, "failed to fetch oauth token")
}()
ap.mu.Lock()
name := fmt.Sprintf("[auth] %v token for %s", strings.Join(trimScopePrefix(req.Scopes), " "), req.Host)
if _, ok := ap.loggerCache[name]; !ok {
progresswriter.Wrap(name, ap.logger, done)
}
ap.mu.Unlock()
// credential information is provided, use oauth POST endpoint
resp, err := authutil.FetchTokenWithOAuth(ctx, httpClient, nil, "devkit-client", to)
if err != nil {
var errStatus remoteserrors.ErrUnexpectedStatus
if errors.As(err, &errStatus) {
// Registries without support for POST may return 404 for POST /v2/token.
// As of September 2017, GCR is known to return 404.
// As of February 2018, JFrog Artifactory is known to return 401.
if (errStatus.StatusCode == 405 && to.Username != "") || errStatus.StatusCode == 404 || errStatus.StatusCode == 401 {
resp, err := authutil.FetchToken(ctx, httpClient, nil, to)
if err != nil {
return nil, err
}
return toTokenResponse(resp.Token, resp.IssuedAt, resp.ExpiresIn), nil
}
}
return nil, err
}
return toTokenResponse(resp.AccessToken, resp.IssuedAt, resp.ExpiresIn), nil
}
// do request anonymously
resp, err := authutil.FetchToken(ctx, httpClient, nil, to)
if err != nil {
return nil, errors.Wrap(err, "failed to fetch anonymous token")
}
return toTokenResponse(resp.Token, resp.IssuedAt, resp.ExpiresIn), nil
}
func (ap *authProvider) tlsConfig(host string) (*tls.Config, error) {
if ap.tlsConfigs == nil {
return nil, nil
}
c, ok := ap.tlsConfigs[host]
if !ok {
return nil, nil
}
tc := &tls.Config{}
if len(c.RootCAs) > 0 {
systemPool, err := x509.SystemCertPool()
if err != nil {
if runtime.GOOS == "windows" {
systemPool = x509.NewCertPool()
} else {
return nil, errors.Wrapf(err, "unable to get system cert pool")
}
}
tc.RootCAs = systemPool
}
for _, p := range c.RootCAs {
dt, err := os.ReadFile(p)
if err != nil {
return nil, errors.Wrapf(err, "failed to read %s", p)
}
tc.RootCAs.AppendCertsFromPEM(dt)
}
for _, kp := range c.KeyPairs {
cert, err := tls.LoadX509KeyPair(kp.Certificate, kp.Key)
if err != nil {
return nil, errors.Wrapf(err, "failed to load keypair for %s", kp.Certificate)
}
tc.Certificates = append(tc.Certificates, cert)
}
if c.Insecure {
tc.InsecureSkipVerify = true
}
return tc, nil
}
func (ap *authProvider) credentials(host string) (*auth.CredentialsResponse, error) {
ac, err := ap.getAuthConfig(host)
if err != nil {
return nil, err
}
res := &auth.CredentialsResponse{}
if ac.IdentityToken != "" {
res.Secret = ac.IdentityToken
} else {
res.Username = ac.Username
res.Secret = ac.Password
}
return res, nil
}
func (ap *authProvider) Credentials(ctx context.Context, req *auth.CredentialsRequest) (*auth.CredentialsResponse, error) {
resp, err := ap.credentials(req.Host)
if err != nil || resp.Secret != "" {
ap.mu.Lock()
defer ap.mu.Unlock()
_, ok := ap.loggerCache[req.Host]
ap.loggerCache[req.Host] = struct{}{}
if !ok && ap.logger != nil {
return resp, progresswriter.Wrap(fmt.Sprintf("[auth] sharing credentials for %s", req.Host), ap.logger, func(progresswriter.SubLogger) error {
return err
})
}
}
return resp, err
}
func (ap *authProvider) GetTokenAuthority(ctx context.Context, req *auth.GetTokenAuthorityRequest) (*auth.GetTokenAuthorityResponse, error) {
key, err := ap.getAuthorityKey(req.Host, req.Salt)
if err != nil {
return nil, err
}
return &auth.GetTokenAuthorityResponse{PublicKey: key[32:]}, nil
}
func (ap *authProvider) VerifyTokenAuthority(ctx context.Context, req *auth.VerifyTokenAuthorityRequest) (*auth.VerifyTokenAuthorityResponse, error) {
key, err := ap.getAuthorityKey(req.Host, req.Salt)
if err != nil {
return nil, err
}
priv := new([64]byte)
copy((*priv)[:], key)
return &auth.VerifyTokenAuthorityResponse{Signed: sign.Sign(nil, req.Payload, priv)}, nil
}
func (ap *authProvider) getAuthConfig(host string) (*types.AuthConfig, error) {
ap.mu.Lock()
defer ap.mu.Unlock()
if host == dockerHubRegistryHost {
host = dockerHubConfigfileKey
}
if _, exists := ap.authConfigCache[host]; !exists {
ac, err := ap.config.GetAuthConfig(host)
if err != nil {
return nil, err
}
ap.authConfigCache[host] = &ac
}
return ap.authConfigCache[host], nil
}
func (ap *authProvider) getAuthorityKey(host string, salt []byte) (ed25519.PrivateKey, error) {
if v, err := strconv.ParseBool(os.Getenv("DEVKIT_NO_CLIENT_TOKEN")); err == nil && v {
return nil, status.Errorf(codes.Unavailable, "client side tokens disabled")
}
creds, err := ap.credentials(host)
if err != nil {
return nil, err
}
seed, err := ap.seeds.getSeed(host)
if err != nil {
return nil, err
}
mac := hmac.New(sha256.New, salt)
if creds.Secret != "" {
mac.Write(seed)
}
sum := mac.Sum(nil)
return ed25519.NewKeyFromSeed(sum[:ed25519.SeedSize]), nil
}
func toTokenResponse(token string, issuedAt time.Time, expires int) *auth.FetchTokenResponse {
if expires == 0 {
expires = defaultExpiration
}
resp := &auth.FetchTokenResponse{
Token: token,
ExpiresIn: int64(expires),
}
if !issuedAt.IsZero() {
resp.IssuedAt = issuedAt.Unix()
}
return resp
}
func trimScopePrefix(scopes []string) []string {
out := make([]string, len(scopes))
for i, s := range scopes {
out[i] = strings.TrimPrefix(s, "repository:")
}
return out
}