Feat: ReCaptcha support (#292)

* Add custom mysql database port.

* Modify: add cloudreve bin file to .gitignore

* Feat:增加后端对ReCaptcha的支持
P.S.必须要执行迁移

.gitignore

 # Binaries for programs and plugins
+cloudreve
 *.exe
 *.exe~
 *.dll

assets @ f544486b

-Subproject commit 43c9ce1d266050637a247113db54883ce2218291
+Subproject commit f544486b6ae2440df197630601b1827ed6977c0b

models/migration.go

@@ -156,6 +156,9 @@ Neue',Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; verti
 		{Name: "captcha_IsShowSlimeLine", Value: "1", Type: "captcha"},
 		{Name: "captcha_IsShowSineLine", Value: "0", Type: "captcha"},
 		{Name: "captcha_CaptchaLen", Value: "6", Type: "captcha"},
+		{Name: "captcha_IsUseReCaptcha", Value: "0", Type: "captcha"},
+		{Name: "captcha_ReCaptchaKey", Value: "defaultKey", Type: "captcha"},
+		{Name: "captcha_ReCaptchaSecret", Value: "defaultSecret", Type: "captcha"},
 		{Name: "thumb_width", Value: "400", Type: "thumb"},
 		{Name: "thumb_height", Value: "300", Type: "thumb"},
 		{Name: "pwa_small_icon", Value: "/static/img/favicon.ico", Type: "pwa"},

pkg/recaptcha/recaptcha.go

+package recaptcha
+
+import (
+	"encoding/json"
+	"fmt"
+	"io/ioutil"
+	"net/http"
+	"net/url"
+	"time"
+)
+
+const reCAPTCHALink = "https://www.recaptcha.net/recaptcha/api/siteverify"
+
+// VERSION the recaptcha api version
+type VERSION int8
+
+const (
+	// V2 recaptcha api v2
+	V2 VERSION = iota
+	// V3 recaptcha api v3, more details can be found here : https://developers.google.com/recaptcha/docs/v3
+	V3
+	// DefaultTreshold Default minimin score when using V3 api
+	DefaultTreshold float32 = 0.5
+)
+
+type reCHAPTCHARequest struct {
+	Secret   string `json:"secret"`
+	Response string `json:"response"`
+	RemoteIP string `json:"remoteip,omitempty"`
+}
+
+type reCHAPTCHAResponse struct {
+	Success        bool      `json:"success"`
+	ChallengeTS    time.Time `json:"challenge_ts"`
+	Hostname       string    `json:"hostname,omitempty"`
+	ApkPackageName string    `json:"apk_package_name,omitempty"`
+	Action         string    `json:"action,omitempty"`
+	Score          float32   `json:"score,omitempty"`
+	ErrorCodes     []string  `json:"error-codes,omitempty"`
+}
+
+// custom client so we can mock in tests
+type netClient interface {
+	PostForm(url string, formValues url.Values) (resp *http.Response, err error)
+}
+
+// custom clock so we can mock in tests
+type clock interface {
+	Since(t time.Time) time.Duration
+}
+
+type realClock struct {
+}
+
+func (realClock) Since(t time.Time) time.Duration {
+	return time.Since(t)
+}
+
+// ReCAPTCHA recpatcha holder struct, make adding mocking code simpler
+type ReCAPTCHA struct {
+	client        netClient
+	Secret        string
+	ReCAPTCHALink string
+	Version       VERSION
+	Timeout       time.Duration
+	horloge       clock
+}
+
+// NewReCAPTCHA new ReCAPTCHA instance if version is set to V2 uses recatpcha v2 API, get your secret from https://www.google.com/recaptcha/admin
+//  if version is set to V2 uses recatpcha v2 API, get your secret from https://g.co/recaptcha/v3
+func NewReCAPTCHA(ReCAPTCHASecret string, version VERSION, timeout time.Duration) (ReCAPTCHA, error) {
+	if ReCAPTCHASecret == "" {
+		return ReCAPTCHA{}, fmt.Errorf("recaptcha secret cannot be blank")
+	}
+	return ReCAPTCHA{
+		client: &http.Client{
+			Timeout: timeout,
+		},
+		horloge:       &realClock{},
+		Secret:        ReCAPTCHASecret,
+		ReCAPTCHALink: reCAPTCHALink,
+		Timeout:       timeout,
+		Version:       version,
+	}, nil
+}
+
+// Verify returns `nil` if no error and the client solved the challenge correctly
+func (r *ReCAPTCHA) Verify(challengeResponse string) error {
+	body := reCHAPTCHARequest{Secret: r.Secret, Response: challengeResponse}
+	return r.confirm(body, VerifyOption{})
+}
+
+// VerifyOption verification options expected for the challenge
+type VerifyOption struct {
+	Threshold      float32 // ignored in v2 recaptcha
+	Action         string  // ignored in v2 recaptcha
+	Hostname       string
+	ApkPackageName string
+	ResponseTime   time.Duration
+	RemoteIP       string
+}
+
+// VerifyWithOptions returns `nil` if no error and the client solved the challenge correctly and all options are natching
+// `Threshold` and `Action` are ignored when using V2 version
+func (r *ReCAPTCHA) VerifyWithOptions(challengeResponse string, options VerifyOption) error {
+	var body reCHAPTCHARequest
+	if options.RemoteIP == "" {
+		body = reCHAPTCHARequest{Secret: r.Secret, Response: challengeResponse}
+	} else {
+		body = reCHAPTCHARequest{Secret: r.Secret, Response: challengeResponse, RemoteIP: options.RemoteIP}
+	}
+	return r.confirm(body, options)
+}
+
+func (r *ReCAPTCHA) confirm(recaptcha reCHAPTCHARequest, options VerifyOption) (Err error) {
+	Err = nil
+	var formValues url.Values
+	if recaptcha.RemoteIP != "" {
+		formValues = url.Values{"secret": {recaptcha.Secret}, "remoteip": {recaptcha.RemoteIP}, "response": {recaptcha.Response}}
+	} else {
+		formValues = url.Values{"secret": {recaptcha.Secret}, "response": {recaptcha.Response}}
+	}
+	response, err := r.client.PostForm(r.ReCAPTCHALink, formValues)
+	if err != nil {
+		Err = fmt.Errorf("error posting to recaptcha endpoint: '%s'", err)
+		return
+	}
+	defer response.Body.Close()
+	resultBody, err := ioutil.ReadAll(response.Body)
+	if err != nil {
+		Err = fmt.Errorf("couldn't read response body: '%s'", err)
+		return
+	}
+	var result reCHAPTCHAResponse
+	err = json.Unmarshal(resultBody, &result)
+	if err != nil {
+		Err = fmt.Errorf("invalid response body json: '%s'", err)
+		return
+	}
+
+	if options.Hostname != "" && options.Hostname != result.Hostname {
+		Err = fmt.Errorf("invalid response hostname '%s', while expecting '%s'", result.Hostname, options.Hostname)
+		return
+	}
+
+	if options.ApkPackageName != "" && options.ApkPackageName != result.ApkPackageName {
+		Err = fmt.Errorf("invalid response ApkPackageName '%s', while expecting '%s'", result.ApkPackageName, options.ApkPackageName)
+		return
+	}
+
+	if options.ResponseTime != 0 {
+		duration := r.horloge.Since(result.ChallengeTS)
+		if options.ResponseTime < duration {
+			Err = fmt.Errorf("time spent in resolving challenge '%fs', while expecting maximum '%fs'", duration.Seconds(), options.ResponseTime.Seconds())
+			return
+		}
+	}
+	if r.Version == V3 {
+		if options.Action != "" && options.Action != result.Action {
+			Err = fmt.Errorf("invalid response action '%s', while expecting '%s'", result.Action, options.Action)
+			return
+		}
+		if options.Threshold != 0 && options.Threshold >= result.Score {
+			Err = fmt.Errorf("received score '%f', while expecting minimum '%f'", result.Score, options.Threshold)
+			return
+		}
+		if options.Threshold == 0 && DefaultTreshold >= result.Score {
+			Err = fmt.Errorf("received score '%f', while expecting minimum '%f'", result.Score, DefaultTreshold)
+			return
+		}
+	}
+	if result.ErrorCodes != nil {
+		Err = fmt.Errorf("remote error codes: %v", result.ErrorCodes)
+		return
+	}
+	if !result.Success && recaptcha.RemoteIP != "" {
+		Err = fmt.Errorf("invalid challenge solution or remote IP")
+	} else if !result.Success {
+		Err = fmt.Errorf("invalid challenge solution")
+	}
+	return
+}

pkg/serializer/setting.go

@@ -15,6 +15,8 @@ type SiteConfig struct {
 	ShareViewMethod    string `json:"share_view_method"`
 	Authn              bool   `json:"authn"'`
 	User               User   `json:"user"`
+	UseReCaptcha       bool   `json:"captcha_IsUseReCaptcha"`
+	ReCaptchaKey       string `json:"captcha_ReCaptchaKey"`
 }
 
 type task struct {
@@ -72,6 +74,8 @@ func BuildSiteConfig(settings map[string]string, user *model.User) Response {
 			ShareViewMethod:    checkSettingValue(settings, "share_view_method"),
 			Authn:              model.IsTrueVal(checkSettingValue(settings, "authn_enabled")),
 			User:               userRes,
+			UseReCaptcha:       model.IsTrueVal(checkSettingValue(settings, "captcha_IsUseReCaptcha")),
+			ReCaptchaKey:       checkSettingValue(settings, "captcha_ReCaptchaKey"),
 		}}
 	return res
 }

routers/controllers/site.go

@@ -23,6 +23,8 @@ func SiteConfig(c *gin.Context) {
 		"home_view_method",
 		"share_view_method",
 		"authn_enabled",
+		"captcha_IsUseReCaptcha",
+		"captcha_ReCaptchaKey",
 	)
 
 	// 如果已登录，则同时返回用户信息和标签

service/user/login.go

@@ -69,12 +69,24 @@ func (service *UserResetService) Reset(c *gin.Context) serializer.Response {
 func (service *UserResetEmailService) Reset(c *gin.Context) serializer.Response {
 	// 检查验证码
 	isCaptchaRequired := model.IsTrueVal(model.GetSettingByName("forget_captcha"))
-	if isCaptchaRequired {
+	useRecaptcha := model.IsTrueVal(model.GetSettingByName("captcha_IsUseReCaptcha"))
+	recaptchaSecret := model.GetSettingByName("captcha_ReCaptchaSecret")
+	if isCaptchaRequired && !useRecaptcha {
 		captchaID := util.GetSession(c, "captchaID")
 		util.DeleteSession(c, "captchaID")
 		if captchaID == nil || !base64Captcha.VerifyCaptcha(captchaID.(string), service.CaptchaCode) {
 			return serializer.ParamErr("验证码错误", nil)
 		}
+	} else if isCaptchaRequired && useRecaptcha {
+		captcha, err := recaptcha.NewReCAPTCHA(recaptchaSecret, recaptcha.V2, 10*time.Second)
+		if err != nil {
+			util.Log().Error(err.Error())
+		}
+		err = captcha.Verify(service.CaptchaCode)
+		if err != nil {
+			util.Log().Error(err.Error())
+			return serializer.ParamErr("验证失败，请刷新网页后再次验证", nil)
+		}
 	}
 
 	// 查找用户
@@ -132,14 +144,27 @@ func (service *Enable2FA) Login(c *gin.Context) serializer.Response {
 // Login 用户登录函数
 func (service *UserLoginService) Login(c *gin.Context) serializer.Response {
 	isCaptchaRequired := model.GetSettingByName("login_captcha")
+	useRecaptcha := model.GetSettingByName("captcha_IsUseReCaptcha")
+	recaptchaSecret := model.GetSettingByName("captcha_ReCaptchaSecret")
 	expectedUser, err := model.GetUserByEmail(service.UserName)
 
-	if model.IsTrueVal(isCaptchaRequired) {
+	if (model.IsTrueVal(isCaptchaRequired)) && !(model.IsTrueVal(useRecaptcha)) {
+		// TODO 验证码校验
 		captchaID := util.GetSession(c, "captchaID")
 		util.DeleteSession(c, "captchaID")
 		if captchaID == nil || !base64Captcha.VerifyCaptcha(captchaID.(string), service.CaptchaCode) {
 			return serializer.ParamErr("验证码错误", nil)
 		}
+	} else if (model.IsTrueVal(isCaptchaRequired)) && (model.IsTrueVal(useRecaptcha)) {
+		captcha, err := recaptcha.NewReCAPTCHA(recaptchaSecret, recaptcha.V2, 10*time.Second)
+		if err != nil {
+			util.Log().Error(err.Error())
+		}
+		err = captcha.Verify(service.CaptchaCode)
+		if err != nil {
+			util.Log().Error(err.Error())
+			return serializer.ParamErr("验证失败，请刷新网页后再次验证", nil)
+		}
 	}
 
 	// 一系列校验

service/user/register.go

@@ -5,12 +5,14 @@ import (
 	"github.com/HFO4/cloudreve/pkg/auth"
 	"github.com/HFO4/cloudreve/pkg/email"
 	"github.com/HFO4/cloudreve/pkg/hashid"
+	"github.com/HFO4/cloudreve/pkg/recaptcha"
 	"github.com/HFO4/cloudreve/pkg/serializer"
 	"github.com/HFO4/cloudreve/pkg/util"
 	"github.com/gin-gonic/gin"
 	"github.com/mojocn/base64Captcha"
 	"net/url"
 	"strings"
+	"time"
 )
 
 // UserRegisterService 管理用户注册的服务
@@ -27,12 +29,24 @@ func (service *UserRegisterService) Register(c *gin.Context) serializer.Response
 	options := model.GetSettingByNames("email_active", "reg_captcha")
 	// 检查验证码
 	isCaptchaRequired := model.IsTrueVal(options["reg_captcha"])
-	if isCaptchaRequired {
+	useRecaptcha := model.IsTrueVal(model.GetSettingByName("captcha_IsUseReCaptcha"))
+	recaptchaSecret := model.GetSettingByName("captcha_ReCaptchaSecret")
+	if isCaptchaRequired && !useRecaptcha {
 		captchaID := util.GetSession(c, "captchaID")
 		util.DeleteSession(c, "captchaID")
 		if captchaID == nil || !base64Captcha.VerifyCaptcha(captchaID.(string), service.CaptchaCode) {
 			return serializer.ParamErr("验证码错误", nil)
 		}
+	} else if isCaptchaRequired && useRecaptcha {
+		captcha, err := recaptcha.NewReCAPTCHA(recaptchaSecret, recaptcha.V2, 10*time.Second)
+		if err != nil {
+			util.Log().Error(err.Error())
+		}
+		err = captcha.Verify(service.CaptchaCode)
+		if err != nil {
+			util.Log().Error(err.Error())
+			return serializer.ParamErr("验证失败，请刷新网页后再次验证", nil)
+		}
 	}
 
 	// 相关设定