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Use docker-credential-helpers client to talk with native creds stores. 

Signed-off-by: David Calavera <david.calavera@gmail.com>
This commit is contained in:
David Calavera 2016-06-04 10:08:22 -07:00
parent feab8db60d
commit ff3e187cc7
No known key found for this signature in database
GPG Key ID: DE3D437CCBECE2C4
3 changed files with 51 additions and 147 deletions
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106
cliconfig/credentials/native_store.go
View File

@ -1,14 +1,8 @@
package credentials
import (
"bytes"
"encoding/json"
"errors"
"fmt"
"io"
"strings"
"github.com/Sirupsen/logrus"
"github.com/docker/docker-credential-helpers/client"
"github.com/docker/docker-credential-helpers/credentials"
"github.com/docker/docker/cliconfig/configfile"
"github.com/docker/engine-api/types"
)
@ -18,50 +12,27 @@ const (
tokenUsername = "<token>"
)
// Standarize the not found error, so every helper returns
// the same message and docker can handle it properly.
var errCredentialsNotFound = errors.New("credentials not found in native keychain")
// command is an interface that remote executed commands implement.
type command interface {
Output() ([]byte, error)
Input(in io.Reader)
}
// credentialsRequest holds information shared between docker and a remote credential store.
type credentialsRequest struct {
ServerURL string
Username string
Secret string
}
// credentialsGetResponse is the information serialized from a remote store
// when the plugin sends requests to get the user credentials.
type credentialsGetResponse struct {
Username string
Secret string
}
// nativeStore implements a credentials store
// using native keychain to keep credentials secure.
// It piggybacks into a file store to keep users' emails.
type nativeStore struct {
commandFn func(args ...string) command
fileStore Store
programFunc client.ProgramFunc
fileStore Store
}
// NewNativeStore creates a new native store that
// uses a remote helper program to manage credentials.
func NewNativeStore(file *configfile.ConfigFile) Store {
name := remoteCredentialsPrefix + file.CredentialsStore
return &nativeStore{
commandFn: shellCommandFn(file.CredentialsStore),
fileStore: NewFileStore(file),
programFunc: client.NewShellProgramFunc(name),
fileStore: NewFileStore(file),
}
}
// Erase removes the given credentials from the native store.
func (c *nativeStore) Erase(serverAddress string) error {
if err := c.eraseCredentialsFromStore(serverAddress); err != nil {
if err := client.Erase(c.programFunc, serverAddress); err != nil {
return err
}
@ -115,8 +86,7 @@ func (c *nativeStore) Store(authConfig types.AuthConfig) error {
// storeCredentialsInStore executes the command to store the credentials in the native store.
func (c *nativeStore) storeCredentialsInStore(config types.AuthConfig) error {
cmd := c.commandFn("store")
creds := &credentialsRequest{
creds := &credentials.Credentials{
ServerURL: config.ServerAddress,
Username: config.Username,
Secret: config.Password,
@ -127,70 +97,30 @@ func (c *nativeStore) storeCredentialsInStore(config types.AuthConfig) error {
creds.Secret = config.IdentityToken
}
buffer := new(bytes.Buffer)
if err := json.NewEncoder(buffer).Encode(creds); err != nil {
return err
}
cmd.Input(buffer)
out, err := cmd.Output()
if err != nil {
t := strings.TrimSpace(string(out))
logrus.Debugf("error adding credentials - err: %v, out: `%s`", err, t)
return fmt.Errorf(t)
}
return nil
return client.Store(c.programFunc, creds)
}
// getCredentialsFromStore executes the command to get the credentials from the native store.
func (c *nativeStore) getCredentialsFromStore(serverAddress string) (types.AuthConfig, error) {
var ret types.AuthConfig
cmd := c.commandFn("get")
cmd.Input(strings.NewReader(serverAddress))
out, err := cmd.Output()
creds, err := client.Get(c.programFunc, serverAddress)
if err != nil {
t := strings.TrimSpace(string(out))
// do not return an error if the credentials are not
// in the keyckain. Let docker ask for new credentials.
if t == errCredentialsNotFound.Error() {
if credentials.IsErrCredentialsNotFound(err) {
// do not return an error if the credentials are not
// in the keyckain. Let docker ask for new credentials.
return ret, nil
}
logrus.Debugf("error getting credentials - err: %v, out: `%s`", err, t)
return ret, fmt.Errorf(t)
}
var resp credentialsGetResponse
if err := json.NewDecoder(bytes.NewReader(out)).Decode(&resp); err != nil {
return ret, err
}
if resp.Username == tokenUsername {
ret.IdentityToken = resp.Secret
if creds.Username == tokenUsername {
ret.IdentityToken = creds.Secret
} else {
ret.Password = resp.Secret
ret.Username = resp.Username
ret.Password = creds.Secret
ret.Username = creds.Username
}
ret.ServerAddress = serverAddress
return ret, nil
}
// eraseCredentialsFromStore executes the command to remove the server credentails from the native store.
func (c *nativeStore) eraseCredentialsFromStore(serverURL string) error {
cmd := c.commandFn("erase")
cmd.Input(strings.NewReader(serverURL))
out, err := cmd.Output()
if err != nil {
t := strings.TrimSpace(string(out))
logrus.Debugf("error erasing credentials - err: %v, out: `%s`", err, t)
return fmt.Errorf(t)
}
return nil
}

64
cliconfig/credentials/native_store_test.go
View File

@ -8,6 +8,8 @@ import (
"strings"
"testing"
"github.com/docker/docker-credential-helpers/client"
"github.com/docker/docker-credential-helpers/credentials"
"github.com/docker/engine-api/types"
)
@ -43,7 +45,7 @@ func (m *mockCommand) Output() ([]byte, error) {
case validServerAddress:
return nil, nil
default:
return []byte("error erasing credentials"), errCommandExited
return []byte("program failed"), errCommandExited
}
case "get":
switch inS {
@ -52,21 +54,21 @@ func (m *mockCommand) Output() ([]byte, error) {
case validServerAddress2:
return []byte(`{"Username": "<token>", "Secret": "abcd1234"}`), nil
case missingCredsAddress:
return []byte(errCredentialsNotFound.Error()), errCommandExited
return []byte(credentials.NewErrCredentialsNotFound().Error()), errCommandExited
case invalidServerAddress:
return []byte("error getting credentials"), errCommandExited
return []byte("program failed"), errCommandExited
}
case "store":
var c credentialsRequest
var c credentials.Credentials
err := json.NewDecoder(strings.NewReader(inS)).Decode(&c)
if err != nil {
return []byte("error storing credentials"), errCommandExited
return []byte("program failed"), errCommandExited
}
switch c.ServerURL {
case validServerAddress:
return nil, nil
default:
return []byte("error storing credentials"), errCommandExited
return []byte("program failed"), errCommandExited
}
}
@ -78,7 +80,7 @@ func (m *mockCommand) Input(in io.Reader) {
m.input = in
}
func mockCommandFn(args ...string) command {
func mockCommandFn(args ...string) client.Program {
return &mockCommand{
arg: args[0],
}
@ -89,8 +91,8 @@ func TestNativeStoreAddCredentials(t *testing.T) {
f.CredentialsStore = "mock"
s := &nativeStore{
commandFn: mockCommandFn,
fileStore: NewFileStore(f),
programFunc: mockCommandFn,
fileStore: NewFileStore(f),
}
err := s.Store(types.AuthConfig{
Username: "foo",
@ -133,8 +135,8 @@ func TestNativeStoreAddInvalidCredentials(t *testing.T) {
f.CredentialsStore = "mock"
s := &nativeStore{
commandFn: mockCommandFn,
fileStore: NewFileStore(f),
programFunc: mockCommandFn,
fileStore: NewFileStore(f),
}
err := s.Store(types.AuthConfig{
Username: "foo",
@ -147,8 +149,8 @@ func TestNativeStoreAddInvalidCredentials(t *testing.T) {
t.Fatal("expected error, got nil")
}
if err.Error() != "error storing credentials" {
t.Fatalf("expected `error storing credentials`, got %v", err)
if !strings.Contains(err.Error(), "program failed") {
t.Fatalf("expected `program failed`, got %v", err)
}
if len(f.AuthConfigs) != 0 {
@ -165,8 +167,8 @@ func TestNativeStoreGet(t *testing.T) {
f.CredentialsStore = "mock"
s := &nativeStore{
commandFn: mockCommandFn,
fileStore: NewFileStore(f),
programFunc: mockCommandFn,
fileStore: NewFileStore(f),
}
a, err := s.Get(validServerAddress)
if err != nil {
@ -196,8 +198,8 @@ func TestNativeStoreGetIdentityToken(t *testing.T) {
f.CredentialsStore = "mock"
s := &nativeStore{
commandFn: mockCommandFn,
fileStore: NewFileStore(f),
programFunc: mockCommandFn,
fileStore: NewFileStore(f),
}
a, err := s.Get(validServerAddress2)
if err != nil {
@ -230,8 +232,8 @@ func TestNativeStoreGetAll(t *testing.T) {
f.CredentialsStore = "mock"
s := &nativeStore{
commandFn: mockCommandFn,
fileStore: NewFileStore(f),
programFunc: mockCommandFn,
fileStore: NewFileStore(f),
}
as, err := s.GetAll()
if err != nil {
@ -277,8 +279,8 @@ func TestNativeStoreGetMissingCredentials(t *testing.T) {
f.CredentialsStore = "mock"
s := &nativeStore{
commandFn: mockCommandFn,
fileStore: NewFileStore(f),
programFunc: mockCommandFn,
fileStore: NewFileStore(f),
}
_, err := s.Get(missingCredsAddress)
if err != nil {
@ -296,16 +298,16 @@ func TestNativeStoreGetInvalidAddress(t *testing.T) {
f.CredentialsStore = "mock"
s := &nativeStore{
commandFn: mockCommandFn,
fileStore: NewFileStore(f),
programFunc: mockCommandFn,
fileStore: NewFileStore(f),
}
_, err := s.Get(invalidServerAddress)
if err == nil {
t.Fatal("expected error, got nil")
}
if err.Error() != "error getting credentials" {
t.Fatalf("expected `error getting credentials`, got %v", err)
if !strings.Contains(err.Error(), "program failed") {
t.Fatalf("expected `program failed`, got %v", err)
}
}
@ -318,8 +320,8 @@ func TestNativeStoreErase(t *testing.T) {
f.CredentialsStore = "mock"
s := &nativeStore{
commandFn: mockCommandFn,
fileStore: NewFileStore(f),
programFunc: mockCommandFn,
fileStore: NewFileStore(f),
}
err := s.Erase(validServerAddress)
if err != nil {
@ -340,15 +342,15 @@ func TestNativeStoreEraseInvalidAddress(t *testing.T) {
f.CredentialsStore = "mock"
s := &nativeStore{
commandFn: mockCommandFn,
fileStore: NewFileStore(f),
programFunc: mockCommandFn,
fileStore: NewFileStore(f),
}
err := s.Erase(invalidServerAddress)
if err == nil {
t.Fatal("expected error, got nil")
}
if err.Error() != "error erasing credentials" {
t.Fatalf("expected `error erasing credentials`, got %v", err)
if !strings.Contains(err.Error(), "program failed") {
t.Fatalf("expected `program failed`, got %v", err)
}
}

28
cliconfig/credentials/shell_command.go
View File

@ -1,28 +0,0 @@
package credentials
import (
"io"
"os/exec"
)
func shellCommandFn(storeName string) func(args ...string) command {
name := remoteCredentialsPrefix + storeName
return func(args ...string) command {
return &shell{cmd: exec.Command(name, args...)}
}
}
// shell invokes shell commands to talk with a remote credentials helper.
type shell struct {
cmd *exec.Cmd
}
// Output returns responses from the remote credentials helper.
func (s *shell) Output() ([]byte, error) {
return s.cmd.Output()
}
// Input sets the input to send to a remote credentials helper.
func (s *shell) Input(in io.Reader) {
s.cmd.Stdin = in
}