Enhance auth JSONRPC, now provides persistent output

Implements

   - Auth.Generate("user")
   - Auth.Fetch("user")
   - Auth.Reset("user")

This patch also adds testing for each of these cases

pkg/auth/config.go

@@ -17,6 +17,7 @@
 package auth
 
 import (
+	"os"
 	"os/user"
 	"path/filepath"
 
@@ -37,7 +38,7 @@ type Config struct {
 	Users   map[string]*User
 }
 
-// getAuthConfigPath get donut config file path
+// getAuthConfigPath get users config path
 func getAuthConfigPath() (string, *probe.Error) {
 	if customConfigPath != "" {
 		return customConfigPath, nil
@@ -46,10 +47,51 @@ func getAuthConfigPath() (string, *probe.Error) {
 	if err != nil {
 		return "", probe.NewError(err)
 	}
-	authConfigPath := filepath.Join(u.HomeDir, ".minio", "users.json")
+	authConfigPath := filepath.Join(u.HomeDir, ".minio")
 	return authConfigPath, nil
 }
 
+// createAuthConfigPath create users config path
+func createAuthConfigPath() *probe.Error {
+	authConfigPath, err := getAuthConfigPath()
+	if err != nil {
+		return err.Trace()
+	}
+	if err := os.MkdirAll(authConfigPath, 0700); err != nil {
+		return probe.NewError(err)
+	}
+	return nil
+}
+
+// isAuthConfigFileExists is auth config file exists?
+func isAuthConfigFileExists() bool {
+	if _, err := os.Stat(mustGetAuthConfigFile()); err != nil {
+		if os.IsNotExist(err) {
+			return false
+		}
+		panic(err)
+	}
+	return true
+}
+
+// mustGetAuthConfigFile always get users config file, if not panic
+func mustGetAuthConfigFile() string {
+	authConfigFile, err := getAuthConfigFile()
+	if err != nil {
+		panic(err)
+	}
+	return authConfigFile
+}
+
+// getAuthConfigFile get users config file
+func getAuthConfigFile() (string, *probe.Error) {
+	authConfigPath, err := getAuthConfigPath()
+	if err != nil {
+		return "", err.Trace()
+	}
+	return filepath.Join(authConfigPath, "users.json"), nil
+}
+
 // customConfigPath not accessed from outside only allowed through get/set methods
 var customConfigPath string
 
@@ -58,9 +100,9 @@ func SetAuthConfigPath(configPath string) {
 	customConfigPath = configPath
 }
 
-// SaveConfig save donut config
+// SaveConfig save auth config
 func SaveConfig(a *Config) *probe.Error {
-	authConfigPath, err := getAuthConfigPath()
+	authConfigFile, err := getAuthConfigFile()
 	if err != nil {
 		return err.Trace()
 	}
@@ -68,18 +110,21 @@ func SaveConfig(a *Config) *probe.Error {
 	if err != nil {
 		return err.Trace()
 	}
-	if err := qc.Save(authConfigPath); err != nil {
+	if err := qc.Save(authConfigFile); err != nil {
 		return err.Trace()
 	}
 	return nil
 }
 
-// LoadConfig load donut config
+// LoadConfig load auth config
 func LoadConfig() (*Config, *probe.Error) {
-	authConfigPath, err := getAuthConfigPath()
+	authConfigFile, err := getAuthConfigFile()
 	if err != nil {
 		return nil, err.Trace()
 	}
+	if _, err := os.Stat(authConfigFile); err != nil {
+		return nil, probe.NewError(err)
+	}
 	a := &Config{}
 	a.Version = "0.0.1"
 	a.Users = make(map[string]*User)
@@ -87,7 +132,7 @@ func LoadConfig() (*Config, *probe.Error) {
 	if err != nil {
 		return nil, err.Trace()
 	}
-	if err := qc.Load(authConfigPath); err != nil {
+	if err := qc.Load(authConfigFile); err != nil {
 		return nil, err.Trace()
 	}
 	return qc.Data().(*Config), nil

pkg/controller/rpc/auth.go

@@ -17,7 +17,10 @@
 package rpc
 
 import (
+	"errors"
 	"net/http"
+	"os"
+	"strings"
 
 	"github.com/minio/minio/pkg/auth"
 	"github.com/minio/minio/pkg/probe"
@@ -26,29 +29,126 @@ import (
 // AuthService auth service
 type AuthService struct{}
 
-// AuthReply reply with new access keys and secret ids
-type AuthReply struct {
-	AccessKeyID     string `json:"accesskey"`
-	SecretAccessKey string `json:"secretaccesskey"`
+// AuthArgs auth params
+type AuthArgs struct {
+	User string `json:"user"`
 }
 
-func getAuth(reply *AuthReply) *probe.Error {
-	accessID, err := auth.GenerateAccessKeyID()
+// AuthReply reply with new access keys and secret ids
+type AuthReply struct {
+	Name            string `json:"name"`
+	AccessKeyID     string `json:"accessKeyId"`
+	SecretAccessKey string `json:"secretAccessKey"`
+}
+
+// generateAuth generate new auth keys for a user
+func generateAuth(args *AuthArgs, reply *AuthReply) *probe.Error {
+	config, err := auth.LoadConfig()
+	if err != nil {
+		if os.IsNotExist(err.ToGoError()) {
+			// Initialize new config, since config file doesn't exist yet
+			config = &auth.Config{}
+			config.Version = "0.0.1"
+			config.Users = make(map[string]*auth.User)
+		} else {
+			return err.Trace()
+		}
+	}
+	if _, ok := config.Users[args.User]; ok {
+		return probe.NewError(errors.New("Credentials already set, if you wish to change this invoke Reset() method"))
+	}
+	accessKeyID, err := auth.GenerateAccessKeyID()
 	if err != nil {
 		return err.Trace()
 	}
-	reply.AccessKeyID = string(accessID)
-	secretID, err := auth.GenerateSecretAccessKey()
+	reply.AccessKeyID = string(accessKeyID)
+
+	secretAccessKey, err := auth.GenerateSecretAccessKey()
 	if err != nil {
 		return err.Trace()
 	}
-	reply.SecretAccessKey = string(secretID)
+	reply.SecretAccessKey = string(secretAccessKey)
+	config.Users[args.User] = &auth.User{
+		Name:            args.User,
+		AccessKeyID:     string(accessKeyID),
+		SecretAccessKey: string(secretAccessKey),
+	}
+	if err := auth.SaveConfig(config); err != nil {
+		return err.Trace()
+	}
 	return nil
 }
 
-// Get auth keys
-func (s *AuthService) Get(r *http.Request, args *Args, reply *AuthReply) error {
-	if err := getAuth(reply); err != nil {
+// fetchAuth fetch auth keys for a user
+func fetchAuth(args *AuthArgs, reply *AuthReply) *probe.Error {
+	config, err := auth.LoadConfig()
+	if err != nil {
+		return err.Trace()
+	}
+	if _, ok := config.Users[args.User]; !ok {
+		return probe.NewError(errors.New("User not found"))
+	}
+	reply.AccessKeyID = config.Users[args.User].AccessKeyID
+	reply.SecretAccessKey = config.Users[args.User].SecretAccessKey
+	return nil
+}
+
+// resetAuth reset auth keys for a user
+func resetAuth(args *AuthArgs, reply *AuthReply) *probe.Error {
+	config, err := auth.LoadConfig()
+	if err != nil {
+		return err.Trace()
+	}
+	if _, ok := config.Users[args.User]; !ok {
+		return probe.NewError(errors.New("User not found"))
+	}
+	accessKeyID, err := auth.GenerateAccessKeyID()
+	if err != nil {
+		return err.Trace()
+	}
+	reply.AccessKeyID = string(accessKeyID)
+	secretAccessKey, err := auth.GenerateSecretAccessKey()
+	if err != nil {
+		return err.Trace()
+	}
+	reply.SecretAccessKey = string(secretAccessKey)
+
+	config.Users[args.User] = &auth.User{
+		Name:            args.User,
+		AccessKeyID:     string(accessKeyID),
+		SecretAccessKey: string(secretAccessKey),
+	}
+	return auth.SaveConfig(config).Trace()
+}
+
+// Generate auth keys
+func (s *AuthService) Generate(r *http.Request, args *AuthArgs, reply *AuthReply) error {
+	if strings.TrimSpace(args.User) == "" {
+		return errors.New("Invalid argument")
+	}
+	if err := generateAuth(args, reply); err != nil {
+		return probe.WrapError(err)
+	}
+	return nil
+}
+
+// Fetch auth keys
+func (s *AuthService) Fetch(r *http.Request, args *AuthArgs, reply *AuthReply) error {
+	if strings.TrimSpace(args.User) == "" {
+		return errors.New("Invalid argument")
+	}
+	if err := fetchAuth(args, reply); err != nil {
+		return probe.WrapError(err)
+	}
+	return nil
+}
+
+// Reset auth keys, generates new set of auth keys
+func (s *AuthService) Reset(r *http.Request, args *AuthArgs, reply *AuthReply) error {
+	if strings.TrimSpace(args.User) == "" {
+		return errors.New("Invalid argument")
+	}
+	if err := resetAuth(args, reply); err != nil {
 		return probe.WrapError(err)
 	}
 	return nil

pkg/controller/rpc/version.go

@@ -18,7 +18,8 @@ package rpc
 
 import (
 	"net/http"
-	"time"
+
+	"github.com/minio/minio/pkg/version"
 )
 
 // Args basic json RPC params
@@ -29,7 +30,7 @@ type Args struct {
 // VersionReply version reply
 type VersionReply struct {
 	Version   string `json:"version"`
-	BuildDate string `json:"build-date"`
+	BuildDate string `json:"buildDate"`
 }
 
 // VersionService -
@@ -38,8 +39,9 @@ type VersionService struct{}
 func getVersion() string {
 	return "0.0.1"
 }
+
 func getBuildDate() string {
-	return time.Now().UTC().Format(http.TimeFormat)
+	return version.Version
 }
 
 func setVersionReply(reply *VersionReply) {

pkg/controller/rpc_test.go

@@ -17,11 +17,14 @@
 package controller
 
 import (
+	"io/ioutil"
 	"net/http"
 	"net/http/httptest"
+	"os"
 	"testing"
 
 	jsonrpc "github.com/gorilla/rpc/v2/json"
+	"github.com/minio/minio/pkg/auth"
 	"github.com/minio/minio/pkg/controller/rpc"
 	. "gopkg.in/check.v1"
 )
@@ -36,6 +39,10 @@ var _ = Suite(&MySuite{})
 var testRPCServer *httptest.Server
 
 func (s *MySuite) SetUpSuite(c *C) {
+	root, err := ioutil.TempDir(os.TempDir(), "api-")
+	c.Assert(err, IsNil)
+	auth.SetAuthConfigPath(root)
+
 	testRPCServer = httptest.NewServer(getRPCHandler())
 }
 
@@ -81,8 +88,8 @@ func (s *MySuite) TestSysInfo(c *C) {
 
 func (s *MySuite) TestAuth(c *C) {
 	op := rpc.Operation{
-		Method:  "Auth.Get",
-		Request: rpc.Args{Request: ""},
+		Method:  "Auth.Generate",
+		Request: rpc.AuthArgs{User: "newuser"},
 	}
 	req, err := rpc.NewRequest(testRPCServer.URL+"/rpc", op, http.DefaultTransport)
 	c.Assert(err, IsNil)
@@ -97,4 +104,40 @@ func (s *MySuite) TestAuth(c *C) {
 	c.Assert(reply, Not(DeepEquals), rpc.AuthReply{})
 	c.Assert(len(reply.AccessKeyID), Equals, 20)
 	c.Assert(len(reply.SecretAccessKey), Equals, 40)
+
+	op = rpc.Operation{
+		Method:  "Auth.Fetch",
+		Request: rpc.AuthArgs{User: "newuser"},
+	}
+	req, err = rpc.NewRequest(testRPCServer.URL+"/rpc", op, http.DefaultTransport)
+	c.Assert(err, IsNil)
+	c.Assert(req.Get("Content-Type"), Equals, "application/json")
+	resp, err = req.Do()
+	c.Assert(err, IsNil)
+	c.Assert(resp.StatusCode, Equals, http.StatusOK)
+
+	var newReply rpc.AuthReply
+	c.Assert(jsonrpc.DecodeClientResponse(resp.Body, &newReply), IsNil)
+	resp.Body.Close()
+	c.Assert(newReply, Not(DeepEquals), rpc.AuthReply{})
+	c.Assert(reply.AccessKeyID, Equals, newReply.AccessKeyID)
+	c.Assert(reply.SecretAccessKey, Equals, newReply.SecretAccessKey)
+
+	op = rpc.Operation{
+		Method:  "Auth.Reset",
+		Request: rpc.AuthArgs{User: "newuser"},
+	}
+	req, err = rpc.NewRequest(testRPCServer.URL+"/rpc", op, http.DefaultTransport)
+	c.Assert(err, IsNil)
+	c.Assert(req.Get("Content-Type"), Equals, "application/json")
+	resp, err = req.Do()
+	c.Assert(err, IsNil)
+	c.Assert(resp.StatusCode, Equals, http.StatusOK)
+
+	var resetReply rpc.AuthReply
+	c.Assert(jsonrpc.DecodeClientResponse(resp.Body, &resetReply), IsNil)
+	resp.Body.Close()
+	c.Assert(newReply, Not(DeepEquals), rpc.AuthReply{})
+	c.Assert(reply.AccessKeyID, Not(Equals), resetReply.AccessKeyID)
+	c.Assert(reply.SecretAccessKey, Not(Equals), resetReply.SecretAccessKey)
 }

pkg/probe/probe.go

@@ -107,6 +107,9 @@ func (e *Error) Trace(fields ...string) *Error {
 
 // Internal trace - records the point at which it is invoked.
 func (e *Error) trace(fields ...string) *Error {
+	if e == nil {
+		return nil
+	}
 	pc, file, line, _ := runtime.Caller(2)
 	function := runtime.FuncForPC(pc).Name()
 	_, function = filepath.Split(function)
@@ -139,6 +142,9 @@ func (e *Error) Untrace() *Error {
 
 // ToGoError returns original error message.
 func (e *Error) ToGoError() error {
+	if e == nil || e.Cause == nil {
+		return nil
+	}
 	return e.Cause
 }
 

pkg/server/api_signature_v4_test.go

@@ -75,7 +75,7 @@ func (s *MyAPISignatureV4Suite) SetUpSuite(c *C) {
 	s.accessKeyID = string(accessKeyID)
 	s.secretAccessKey = string(secretAccessKey)
 
-	auth.SetAuthConfigPath(filepath.Join(root, "users.json"))
+	auth.SetAuthConfigPath(root)
 	perr = auth.SaveConfig(authConf)
 	c.Assert(perr, IsNil)