secretservice: add D-Bus secret service

Signed-off-by: Antonio Murdaca <runcom@redhat.com>

.travis.yml

@@ -1,19 +1,28 @@
 ---
   # See appveyor.yml for windows build.
-  sudo: false
+  sudo: required
   language: go
+  dist: trusty
   os:
+    - linux
     - osx
   notifications:
     email: false
   go:
     - 1.6
   install: make deps
-  before_script: make validate
+  addons:
+    apt:
+      packages:
+        - libsecret-1-dev
+  before_script:
+    - "export DISPLAY=:99.0"
+    - if [[ "$TRAVIS_OS_NAME" == "linux"  ]]; then sh ci/before_script_linux.sh; fi
+    - make validate
   script: make test
 
   before_deploy:
-    - sh ci/before_deploy.sh
+    - if [[ "$TRAVIS_OS_NAME" == "osx"  ]]; then sh ci/before_deploy_osx.sh; fi
 
   deploy:
     provider: releases
@@ -25,7 +34,7 @@
     # deploy when a new tag is pushed
     on:
       tags: true
-  
+
   branches:
     only:
       # Pushes and PR to the master branch

Makefile

@@ -1,4 +1,6 @@
-.PHONY: all deps osxkeychain test validate wincred
+.PHONY: all deps osxkeychain secretservice test validate wincred
+
+TRAVIS_OS_NAME ?= linux
 
 all: test
 
@@ -9,15 +11,29 @@ osxkeychain:
 	mkdir -p bin
 	go build -o bin/docker-credential-osxkeychain osxkeychain/cmd/main_darwin.go
 
-test:
+secretservice:
-	# tests all packages except vendor
+	mkdir -p bin
-	go test -v `go list ./... | grep -v /vendor/`
+	go build -o bin/docker-credential-secretservice secretservice/cmd/main_linux.go
-
-validate:
-	go vet ./credentials ./osxkeychain
-	golint `go list ./... | grep -v /vendor/`
-	gofmt -s -l `ls **/*.go | grep -v vendor`
 
 wincred:
 	mkdir -p bin
 	go build -o bin/docker-credential-wincred wincred/cmd/main_windows.go
+
+test:
+	# tests all packages except vendor
+	go test -v `go list ./... | grep -v /vendor/`
+
+vet: vet_$(TRAVIS_OS_NAME)
+	go vet ./credentials
+
+vet_osx:
+	go vet ./osxkeychain
+
+vet_linux:
+	go vet ./secretservice
+
+validate: vet
+	for p in `go list ./... | grep -v /vendor/`; do \
+		golint $$p ; \
+	done
+	gofmt -s -l `ls **/*.go | grep -v vendor`

README.md

@@ -38,6 +38,7 @@ Set the `credsStore` option in your `.docker/config.json` file with the suffix o
 ### Available programs
 
 1. osxkeychain: Provides a helper to use the OS X keychain as credentials store.
+1. secretservice: Provides a helper to use the D-Bus secret service as credentials store.
 2. wincred: Provides a helper to use Windows credentials manager as store.
 
 ## Development

ci/before_script_linux.sh

@@ -0,0 +1,4 @@
+set -ex
+
+sh -e /etc/init.d/xvfb start
+sleep 3 # give xvfb some time to start

secretservice/cmd/main_linux.go

@@ -0,0 +1,10 @@
+package main
+
+import (
+	"github.com/docker/docker-credential-helpers/credentials"
+	"github.com/docker/docker-credential-helpers/secretservice"
+)
+
+func main() {
+	credentials.Serve(secretservice.New())
+}

secretservice/secretservice_linux.c

@@ -0,0 +1,98 @@
+#include <string.h>
+#include "secretservice_linux.h"
+
+const SecretSchema *docker_get_schema(void)
+{
+	static const SecretSchema docker_schema = {
+		"io.docker.Credentials", SECRET_SCHEMA_NONE,
+		{
+			{ "server", SECRET_SCHEMA_ATTRIBUTE_STRING },
+			{ "username", SECRET_SCHEMA_ATTRIBUTE_STRING },
+			{ "docker_cli", SECRET_SCHEMA_ATTRIBUTE_STRING },
+			{ "NULL", 0 },
+		}
+	};
+	return &docker_schema;
+}
+
+GError *add(char *server, char *username, char *password) {
+	GError *err = NULL;
+
+	secret_password_store_sync (DOCKER_SCHEMA, SECRET_COLLECTION_DEFAULT,
+			server, password, NULL, &err,
+			"server", server,
+			"username", username,
+			"docker_cli", "1",
+			NULL);
+	return err;
+}
+
+GError *delete(char *server) {
+	GError *err = NULL;
+
+	secret_password_clear_sync(DOCKER_SCHEMA, NULL, &err,
+			"server", server,
+			"docker_cli", "1",
+			NULL);
+	if (err != NULL)
+		return err;
+	return NULL;
+}
+
+char *get_username(SecretItem *item) {
+	GHashTable *attributes;
+	GHashTableIter iter;
+	gchar *value, *key;
+
+	attributes = secret_item_get_attributes(item);
+	g_hash_table_iter_init(&iter, attributes);
+	while (g_hash_table_iter_next(&iter, (void **)&key, (void **)&value)) {
+		if (strncmp(key, "username", strlen(key)) == 0)
+			return (char *)value;
+	}
+	g_hash_table_unref(attributes);
+	return NULL;
+}
+
+GError *get(char *server, char **username, char **password) {
+	GError *err = NULL;
+	GHashTable *attributes;
+	SecretService *service;
+	GList *items, *l;
+	SecretSearchFlags flags = SECRET_SEARCH_LOAD_SECRETS | SECRET_SEARCH_ALL | SECRET_SEARCH_UNLOCK;
+	SecretValue *secret;
+	gsize length;
+	gchar *value;
+
+	attributes = g_hash_table_new_full(g_str_hash, g_str_equal, g_free, g_free);
+	g_hash_table_insert(attributes, g_strdup("server"), g_strdup(server));
+	g_hash_table_insert(attributes, g_strdup("docker_cli"), g_strdup("1"));
+
+	service = secret_service_get_sync(SECRET_SERVICE_NONE, NULL, &err);
+	if (err == NULL) {
+		items = secret_service_search_sync(service, NULL, attributes, flags, NULL, &err);
+		if (err == NULL) {
+			for (l = items; l != NULL; l = g_list_next(l)) {
+				value = secret_item_get_schema_name(l->data);
+				if (strncmp(value, "io.docker.Credentials", strlen(value)) != 0) {
+					g_free(value);
+					continue;
+				}
+				g_free(value);
+				secret = secret_item_get_secret(l->data);
+				if (secret != NULL) {
+					*password = strdup(secret_value_get(secret, &length));
+					secret_value_unref(secret);
+				}
+				*username = get_username(l->data);
+			}
+			g_list_free_full(items, g_object_unref);
+		}
+		g_object_unref(service);
+	}
+	g_hash_table_unref(attributes);
+	if (err != NULL) {
+		return err;
+	}
+	return NULL;
+}

secretservice/secretservice_linux.go

@@ -0,0 +1,84 @@
+package secretservice
+
+/*
+#cgo pkg-config: libsecret-1
+
+#include "secretservice_linux.h"
+#include <stdlib.h>
+*/
+import "C"
+import (
+	"errors"
+	"unsafe"
+
+	"github.com/docker/docker-credential-helpers/credentials"
+)
+
+type secretservice struct{}
+
+// New creates a new secretservice.
+func New() credentials.Helper {
+	return secretservice{}
+}
+
+// Add adds new credentials to the keychain.
+func (h secretservice) Add(creds *credentials.Credentials) error {
+	if creds == nil {
+		return errors.New("missing credentials")
+	}
+	server := C.CString(creds.ServerURL)
+	defer C.free(unsafe.Pointer(server))
+	username := C.CString(creds.Username)
+	defer C.free(unsafe.Pointer(username))
+	password := C.CString(creds.Password)
+	defer C.free(unsafe.Pointer(password))
+
+	if err := C.add(server, username, password); err != nil {
+		defer C.g_error_free(err)
+		errMsg := (*C.char)(unsafe.Pointer(err.message))
+		return errors.New(C.GoString(errMsg))
+	}
+	return nil
+}
+
+// Delete removes credentials from the keychain.
+func (h secretservice) Delete(serverURL string) error {
+	if serverURL == "" {
+		return errors.New("missing server url")
+	}
+	server := C.CString(serverURL)
+	defer C.free(unsafe.Pointer(server))
+
+	if err := C.delete(server); err != nil {
+		defer C.g_error_free(err)
+		errMsg := (*C.char)(unsafe.Pointer(err.message))
+		return errors.New(C.GoString(errMsg))
+	}
+	return nil
+}
+
+// Get returns the username and password to use for a given registry server URL.
+func (h secretservice) Get(serverURL string) (string, string, error) {
+	if serverURL == "" {
+		return "", "", errors.New("missing server url")
+	}
+	var username *C.char
+	defer C.free(unsafe.Pointer(username))
+	var password *C.char
+	defer C.free(unsafe.Pointer(password))
+	server := C.CString(serverURL)
+	defer C.free(unsafe.Pointer(server))
+
+	err := C.get(server, &username, &password)
+	if err != nil {
+		defer C.g_error_free(err)
+		errMsg := (*C.char)(unsafe.Pointer(err.message))
+		return "", "", errors.New(C.GoString(errMsg))
+	}
+	user := C.GoString(username)
+	pass := C.GoString(password)
+	if pass == "" {
+		return "", "", credentials.ErrCredentialsNotFound
+	}
+	return user, pass, nil
+}

secretservice/secretservice_linux.h

@@ -0,0 +1,11 @@
+#define SECRET_WITH_UNSTABLE 1
+#define SECRET_API_SUBJECT_TO_CHANGE 1
+#include <libsecret/secret.h>
+
+const SecretSchema *docker_get_schema(void) G_GNUC_CONST;
+
+#define DOCKER_SCHEMA docker_get_schema()
+
+GError *add(char *server, char *username, char *password);
+GError *delete(char *server);
+GError *get(char *server, char **username, char **password);

secretservice/secretservice_linux_test.go

@@ -0,0 +1,49 @@
+package secretservice
+
+import (
+	"testing"
+
+	"github.com/docker/docker-credential-helpers/credentials"
+)
+
+func TestSecretServiceHelper(t *testing.T) {
+	t.Skip("test requires gnome-keyring but travis CI doesn't have it")
+
+	creds := &credentials.Credentials{
+		ServerURL: "https://foobar.docker.io:2376/v1",
+		Username:  "foobar",
+		Password:  "foobarbaz",
+	}
+
+	helper := New()
+	if err := helper.Add(creds); err != nil {
+		t.Fatal(err)
+	}
+
+	username, password, err := helper.Get(creds.ServerURL)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if username != "foobar" {
+		t.Fatalf("expected %s, got %s\n", "foobar", username)
+	}
+
+	if password != "foobarbaz" {
+		t.Fatalf("expected %s, got %s\n", "foobarbaz", password)
+	}
+
+	if err := helper.Delete(creds.ServerURL); err != nil {
+		t.Fatal(err)
+	}
+}
+
+func TestMissingCredentials(t *testing.T) {
+	t.Skip("test requires gnome-keyring but travis CI doesn't have it")
+
+	helper := New()
+	_, _, err := helper.Get("https://adsfasdf.wrewerwer.com/asdfsdddd")
+	if err != credentials.ErrCredentialsNotFound {
+		t.Fatalf("exptected ErrCredentialsNotFound, got %v", err)
+	}
+}