feat: add support for magic link login (#65)

* feat: add support for magic link login

* update readme

README.md

@@ -30,6 +30,7 @@
 - ✅ Forgot password flow using email
 - ✅ Social logins (Google, Github, Facebook, more coming soon)
 - ✅ Role-based access management
+- ✅ Password-less login with email and magic link
 
 ## Project Status
 
@@ -37,7 +38,6 @@
 
 ## Roadmap
 
-- Password-less login with email and magic link
 - Support more JWT encryption algorithms (Currently supporting HS256)
 - 2 Factor authentication
 - Back office (Admin dashboard to manage user)

server/constants/constants.go

@@ -21,6 +21,7 @@ var (
 	RESET_PASSWORD_URL           = ""
 	DISABLE_EMAIL_VERIFICATION   = "false"
 	DISABLE_BASIC_AUTHENTICATION = "false"
+	DISABLE_MAGIC_LOGIN          = "false"
 
 	// ROLES
 	ROLES           = []string{}

server/env.go

@@ -64,6 +64,7 @@ func InitEnv() {
 	constants.RESET_PASSWORD_URL = strings.TrimPrefix(os.Getenv("RESET_PASSWORD_URL"), "/")
 	constants.DISABLE_BASIC_AUTHENTICATION = os.Getenv("DISABLE_BASIC_AUTHENTICATION")
 	constants.DISABLE_EMAIL_VERIFICATION = os.Getenv("DISABLE_EMAIL_VERIFICATION")
+	constants.DISABLE_MAGIC_LOGIN = os.Getenv("DISABLE_MAGIC_LOGIN")
 	constants.JWT_ROLE_CLAIM = os.Getenv("JWT_ROLE_CLAIM")
 
 	if constants.ADMIN_SECRET == "" {
@@ -126,6 +127,10 @@ func InitEnv() {
 		constants.DISABLE_BASIC_AUTHENTICATION = "false"
 	}
 
+	if constants.DISABLE_MAGIC_LOGIN == "" {
+		constants.DISABLE_MAGIC_LOGIN = "false"
+	}
+
 	if constants.DISABLE_EMAIL_VERIFICATION == "" && constants.DISABLE_BASIC_AUTHENTICATION == "false" {
 		if constants.SMTP_HOST == "" || constants.SENDER_EMAIL == "" || constants.SENDER_PASSWORD == "" {
 			constants.DISABLE_EMAIL_VERIFICATION = "true"

server/graph/generated/generated.go

@@ -61,6 +61,7 @@ type ComplexityRoot struct {
 		IsFacebookLoginEnabled       func(childComplexity int) int
 		IsGithubLoginEnabled         func(childComplexity int) int
 		IsGoogleLoginEnabled         func(childComplexity int) int
+		IsMagicLoginEnabled          func(childComplexity int) int
 		IsTwitterLoginEnabled        func(childComplexity int) int
 		Version                      func(childComplexity int) int
 	}
@@ -71,6 +72,7 @@ type ComplexityRoot struct {
 		ForgotPassword    func(childComplexity int, params model.ForgotPasswordInput) int
 		Login             func(childComplexity int, params model.LoginInput) int
 		Logout            func(childComplexity int) int
+		MagicLogin        func(childComplexity int, params model.MagicLoginInput) int
 		ResendVerifyEmail func(childComplexity int, params model.ResendVerifyEmailInput) int
 		ResetPassword     func(childComplexity int, params model.ResetPasswordInput) int
 		Signup            func(childComplexity int, params model.SignUpInput) int
@@ -117,6 +119,7 @@ type ComplexityRoot struct {
 type MutationResolver interface {
 	Signup(ctx context.Context, params model.SignUpInput) (*model.AuthResponse, error)
 	Login(ctx context.Context, params model.LoginInput) (*model.AuthResponse, error)
+	MagicLogin(ctx context.Context, params model.MagicLoginInput) (*model.Response, error)
 	Logout(ctx context.Context) (*model.Response, error)
 	UpdateProfile(ctx context.Context, params model.UpdateProfileInput) (*model.Response, error)
 	AdminUpdateUser(ctx context.Context, params model.AdminUpdateUserInput) (*model.User, error)
@@ -226,6 +229,13 @@ func (e *executableSchema) Complexity(typeName, field string, childComplexity in
 
 		return e.complexity.Meta.IsGoogleLoginEnabled(childComplexity), true
 
+	case "Meta.isMagicLoginEnabled":
+		if e.complexity.Meta.IsMagicLoginEnabled == nil {
+			break
+		}
+
+		return e.complexity.Meta.IsMagicLoginEnabled(childComplexity), true
+
 	case "Meta.isTwitterLoginEnabled":
 		if e.complexity.Meta.IsTwitterLoginEnabled == nil {
 			break
@@ -295,6 +305,18 @@ func (e *executableSchema) Complexity(typeName, field string, childComplexity in
 
 		return e.complexity.Mutation.Logout(childComplexity), true
 
+	case "Mutation.magicLogin":
+		if e.complexity.Mutation.MagicLogin == nil {
+			break
+		}
+
+		args, err := ec.field_Mutation_magicLogin_args(context.TODO(), rawArgs)
+		if err != nil {
+			return 0, false
+		}
+
+		return e.complexity.Mutation.MagicLogin(childComplexity, args["params"].(model.MagicLoginInput)), true
+
 	case "Mutation.resendVerifyEmail":
 		if e.complexity.Mutation.ResendVerifyEmail == nil {
 			break
@@ -600,6 +622,7 @@ type Meta {
 	isGithubLoginEnabled: Boolean!
 	isEmailVerificationEnabled: Boolean!
 	isBasicAuthenticationEnabled: Boolean!
+	isMagicLoginEnabled: Boolean!
 }
 
 type User {
@@ -699,9 +722,15 @@ input DeleteUserInput {
 	email: String!
 }
 
+input MagicLoginInput {
+	email: String!
+	roles: [String!]
+}
+
 type Mutation {
 	signup(params: SignUpInput!): AuthResponse!
 	login(params: LoginInput!): AuthResponse!
+	magicLogin(params: MagicLoginInput!): Response!
 	logout: Response!
 	updateProfile(params: UpdateProfileInput!): Response!
 	adminUpdateUser(params: AdminUpdateUserInput!): User!
@@ -787,6 +816,21 @@ func (ec *executionContext) field_Mutation_login_args(ctx context.Context, rawAr
 	return args, nil
 }
 
+func (ec *executionContext) field_Mutation_magicLogin_args(ctx context.Context, rawArgs map[string]interface{}) (map[string]interface{}, error) {
+	var err error
+	args := map[string]interface{}{}
+	var arg0 model.MagicLoginInput
+	if tmp, ok := rawArgs["params"]; ok {
+		ctx := graphql.WithPathContext(ctx, graphql.NewPathWithField("params"))
+		arg0, err = ec.unmarshalNMagicLoginInput2githubᚗcomᚋauthorizerdevᚋauthorizerᚋserverᚋgraphᚋmodelᚐMagicLoginInput(ctx, tmp)
+		if err != nil {
+			return nil, err
+		}
+	}
+	args["params"] = arg0
+	return args, nil
+}
+
 func (ec *executionContext) field_Mutation_resendVerifyEmail_args(ctx context.Context, rawArgs map[string]interface{}) (map[string]interface{}, error) {
 	var err error
 	args := map[string]interface{}{}
@@ -1376,6 +1420,41 @@ func (ec *executionContext) _Meta_isBasicAuthenticationEnabled(ctx context.Conte
 	return ec.marshalNBoolean2bool(ctx, field.Selections, res)
 }
 
+func (ec *executionContext) _Meta_isMagicLoginEnabled(ctx context.Context, field graphql.CollectedField, obj *model.Meta) (ret graphql.Marshaler) {
+	defer func() {
+		if r := recover(); r != nil {
+			ec.Error(ctx, ec.Recover(ctx, r))
+			ret = graphql.Null
+		}
+	}()
+	fc := &graphql.FieldContext{
+		Object:     "Meta",
+		Field:      field,
+		Args:       nil,
+		IsMethod:   false,
+		IsResolver: false,
+	}
+
+	ctx = graphql.WithFieldContext(ctx, fc)
+	resTmp, err := ec.ResolverMiddleware(ctx, func(rctx context.Context) (interface{}, error) {
+		ctx = rctx // use context from middleware stack in children
+		return obj.IsMagicLoginEnabled, nil
+	})
+	if err != nil {
+		ec.Error(ctx, err)
+		return graphql.Null
+	}
+	if resTmp == nil {
+		if !graphql.HasFieldError(ctx, fc) {
+			ec.Errorf(ctx, "must not be null")
+		}
+		return graphql.Null
+	}
+	res := resTmp.(bool)
+	fc.Result = res
+	return ec.marshalNBoolean2bool(ctx, field.Selections, res)
+}
+
 func (ec *executionContext) _Mutation_signup(ctx context.Context, field graphql.CollectedField) (ret graphql.Marshaler) {
 	defer func() {
 		if r := recover(); r != nil {
@@ -1460,6 +1539,48 @@ func (ec *executionContext) _Mutation_login(ctx context.Context, field graphql.C
 	return ec.marshalNAuthResponse2ᚖgithubᚗcomᚋauthorizerdevᚋauthorizerᚋserverᚋgraphᚋmodelᚐAuthResponse(ctx, field.Selections, res)
 }
 
+func (ec *executionContext) _Mutation_magicLogin(ctx context.Context, field graphql.CollectedField) (ret graphql.Marshaler) {
+	defer func() {
+		if r := recover(); r != nil {
+			ec.Error(ctx, ec.Recover(ctx, r))
+			ret = graphql.Null
+		}
+	}()
+	fc := &graphql.FieldContext{
+		Object:     "Mutation",
+		Field:      field,
+		Args:       nil,
+		IsMethod:   true,
+		IsResolver: true,
+	}
+
+	ctx = graphql.WithFieldContext(ctx, fc)
+	rawArgs := field.ArgumentMap(ec.Variables)
+	args, err := ec.field_Mutation_magicLogin_args(ctx, rawArgs)
+	if err != nil {
+		ec.Error(ctx, err)
+		return graphql.Null
+	}
+	fc.Args = args
+	resTmp, err := ec.ResolverMiddleware(ctx, func(rctx context.Context) (interface{}, error) {
+		ctx = rctx // use context from middleware stack in children
+		return ec.resolvers.Mutation().MagicLogin(rctx, args["params"].(model.MagicLoginInput))
+	})
+	if err != nil {
+		ec.Error(ctx, err)
+		return graphql.Null
+	}
+	if resTmp == nil {
+		if !graphql.HasFieldError(ctx, fc) {
+			ec.Errorf(ctx, "must not be null")
+		}
+		return graphql.Null
+	}
+	res := resTmp.(*model.Response)
+	fc.Result = res
+	return ec.marshalNResponse2ᚖgithubᚗcomᚋauthorizerdevᚋauthorizerᚋserverᚋgraphᚋmodelᚐResponse(ctx, field.Selections, res)
+}
+
 func (ec *executionContext) _Mutation_logout(ctx context.Context, field graphql.CollectedField) (ret graphql.Marshaler) {
 	defer func() {
 		if r := recover(); r != nil {
@@ -3856,6 +3977,34 @@ func (ec *executionContext) unmarshalInputLoginInput(ctx context.Context, obj in
 	return it, nil
 }
 
+func (ec *executionContext) unmarshalInputMagicLoginInput(ctx context.Context, obj interface{}) (model.MagicLoginInput, error) {
+	var it model.MagicLoginInput
+	var asMap = obj.(map[string]interface{})
+
+	for k, v := range asMap {
+		switch k {
+		case "email":
+			var err error
+
+			ctx := graphql.WithPathContext(ctx, graphql.NewPathWithField("email"))
+			it.Email, err = ec.unmarshalNString2string(ctx, v)
+			if err != nil {
+				return it, err
+			}
+		case "roles":
+			var err error
+
+			ctx := graphql.WithPathContext(ctx, graphql.NewPathWithField("roles"))
+			it.Roles, err = ec.unmarshalOString2ᚕstringᚄ(ctx, v)
+			if err != nil {
+				return it, err
+			}
+		}
+	}
+
+	return it, nil
+}
+
 func (ec *executionContext) unmarshalInputResendVerifyEmailInput(ctx context.Context, obj interface{}) (model.ResendVerifyEmailInput, error) {
 	var it model.ResendVerifyEmailInput
 	var asMap = obj.(map[string]interface{})
@@ -4187,6 +4336,11 @@ func (ec *executionContext) _Meta(ctx context.Context, sel ast.SelectionSet, obj
 			if out.Values[i] == graphql.Null {
 				invalids++
 			}
+		case "isMagicLoginEnabled":
+			out.Values[i] = ec._Meta_isMagicLoginEnabled(ctx, field, obj)
+			if out.Values[i] == graphql.Null {
+				invalids++
+			}
 		default:
 			panic("unknown field " + strconv.Quote(field.Name))
 		}
@@ -4223,6 +4377,11 @@ func (ec *executionContext) _Mutation(ctx context.Context, sel ast.SelectionSet)
 			if out.Values[i] == graphql.Null {
 				invalids++
 			}
+		case "magicLogin":
+			out.Values[i] = ec._Mutation_magicLogin(ctx, field)
+			if out.Values[i] == graphql.Null {
+				invalids++
+			}
 		case "logout":
 			out.Values[i] = ec._Mutation_logout(ctx, field)
 			if out.Values[i] == graphql.Null {
@@ -4800,6 +4959,11 @@ func (ec *executionContext) unmarshalNLoginInput2githubᚗcomᚋauthorizerdevᚋ
 	return res, graphql.ErrorOnPath(ctx, err)
 }
 
+func (ec *executionContext) unmarshalNMagicLoginInput2githubᚗcomᚋauthorizerdevᚋauthorizerᚋserverᚋgraphᚋmodelᚐMagicLoginInput(ctx context.Context, v interface{}) (model.MagicLoginInput, error) {
+	res, err := ec.unmarshalInputMagicLoginInput(ctx, v)
+	return res, graphql.ErrorOnPath(ctx, err)
+}
+
 func (ec *executionContext) marshalNMeta2githubᚗcomᚋauthorizerdevᚋauthorizerᚋserverᚋgraphᚋmodelᚐMeta(ctx context.Context, sel ast.SelectionSet, v model.Meta) graphql.Marshaler {
 	return ec._Meta(ctx, sel, &v)
 }

server/graph/model/models_gen.go

@@ -37,6 +37,11 @@ type LoginInput struct {
 	Roles    []string `json:"roles"`
 }
 
+type MagicLoginInput struct {
+	Email string   `json:"email"`
+	Roles []string `json:"roles"`
+}
+
 type Meta struct {
 	Version                      string `json:"version"`
 	IsGoogleLoginEnabled         bool   `json:"isGoogleLoginEnabled"`
@@ -45,6 +50,7 @@ type Meta struct {
 	IsGithubLoginEnabled         bool   `json:"isGithubLoginEnabled"`
 	IsEmailVerificationEnabled   bool   `json:"isEmailVerificationEnabled"`
 	IsBasicAuthenticationEnabled bool   `json:"isBasicAuthenticationEnabled"`
+	IsMagicLoginEnabled          bool   `json:"isMagicLoginEnabled"`
 }
 
 type ResendVerifyEmailInput struct {

server/graph/schema.graphqls

@@ -13,6 +13,7 @@ type Meta {
 	isGithubLoginEnabled: Boolean!
 	isEmailVerificationEnabled: Boolean!
 	isBasicAuthenticationEnabled: Boolean!
+	isMagicLoginEnabled: Boolean!
 }
 
 type User {
@@ -112,9 +113,15 @@ input DeleteUserInput {
 	email: String!
 }
 
+input MagicLoginInput {
+	email: String!
+	roles: [String!]
+}
+
 type Mutation {
 	signup(params: SignUpInput!): AuthResponse!
 	login(params: LoginInput!): AuthResponse!
+	magicLogin(params: MagicLoginInput!): Response!
 	logout: Response!
 	updateProfile(params: UpdateProfileInput!): Response!
 	adminUpdateUser(params: AdminUpdateUserInput!): User!

server/graph/schema.resolvers.go

@@ -19,6 +19,10 @@ func (r *mutationResolver) Login(ctx context.Context, params model.LoginInput) (
 	return resolvers.Login(ctx, params)
 }
 
+func (r *mutationResolver) MagicLogin(ctx context.Context, params model.MagicLoginInput) (*model.Response, error) {
+	return resolvers.MagicLogin(ctx, params)
+}
+
 func (r *mutationResolver) Logout(ctx context.Context) (*model.Response, error) {
 	return resolvers.Logout(ctx)
 }

server/handlers/oauthCallback.go

@@ -208,7 +208,7 @@ func OAuthCallbackHandler() gin.HandlerFunc {
 
 			signupMethod := existingUser.SignupMethod
 			if !strings.Contains(signupMethod, provider) {
-				signupMethod = signupMethod + "," + enum.Github.String()
+				signupMethod = signupMethod + "," + provider
 			}
 			user.SignupMethod = signupMethod
 			user.Password = existingUser.Password

server/handlers/verifyEmail.go

@@ -46,7 +46,9 @@ func VerifyEmailHandler() gin.HandlerFunc {
 		}
 
 		// update email_verified_at in users table
+		if user.EmailVerifiedAt <= 0 {
 			db.Mgr.UpdateVerificationTime(time.Now().Unix(), user.ID)
+		}
 		// delete from verification table
 		db.Mgr.DeleteToken(claim.Email)
 

server/resolvers/magicLogin.go

@@ -0,0 +1,122 @@
+package resolvers
+
+import (
+	"context"
+	"fmt"
+	"log"
+	"strings"
+	"time"
+
+	"github.com/authorizerdev/authorizer/server/constants"
+	"github.com/authorizerdev/authorizer/server/db"
+	"github.com/authorizerdev/authorizer/server/enum"
+	"github.com/authorizerdev/authorizer/server/graph/model"
+	"github.com/authorizerdev/authorizer/server/utils"
+)
+
+func MagicLogin(ctx context.Context, params model.MagicLoginInput) (*model.Response, error) {
+	var res *model.Response
+
+	if constants.DISABLE_MAGIC_LOGIN == "true" {
+		return res, fmt.Errorf(`magic link login is disabled for this instance`)
+	}
+
+	params.Email = strings.ToLower(params.Email)
+
+	if !utils.IsValidEmail(params.Email) {
+		return res, fmt.Errorf(`invalid email address`)
+	}
+
+	inputRoles := []string{}
+
+	user := db.User{
+		Email: params.Email,
+	}
+
+	// find user with email
+	existingUser, err := db.Mgr.GetUserByEmail(params.Email)
+	if err != nil {
+		user.SignupMethod = enum.MagicLink.String()
+		// define roles for new user
+		if len(params.Roles) > 0 {
+			// check if roles exists
+			if !utils.IsValidRoles(constants.ROLES, params.Roles) {
+				return res, fmt.Errorf(`invalid roles`)
+			} else {
+				inputRoles = params.Roles
+			}
+		} else {
+			inputRoles = constants.DEFAULT_ROLES
+		}
+
+		user.Roles = strings.Join(inputRoles, ",")
+	} else {
+		user = existingUser
+		// There multiple scenarios with roles here in magic link login
+		// 1. user has access to protected roles + roles and trying to login
+		// 2. user has not signed up for one of the available role but trying to signup.
+		// 		Need to modify roles in this case
+
+		// find the unassigned roles
+		existingRoles := strings.Split(existingUser.Roles, ",")
+		unasignedRoles := []string{}
+		for _, ir := range inputRoles {
+			if !utils.StringSliceContains(existingRoles, ir) {
+				unasignedRoles = append(unasignedRoles, ir)
+			}
+		}
+
+		if len(unasignedRoles) > 0 {
+			// check if it contains protected unassigned role
+			hasProtectedRole := false
+			for _, ur := range unasignedRoles {
+				if utils.StringSliceContains(constants.PROTECTED_ROLES, ur) {
+					hasProtectedRole = true
+				}
+			}
+
+			if hasProtectedRole {
+				return res, fmt.Errorf(`invalid roles`)
+			} else {
+				user.Roles = existingUser.Roles + "," + strings.Join(unasignedRoles, ",")
+			}
+		} else {
+			user.Roles = existingUser.Roles
+		}
+
+		signupMethod := existingUser.SignupMethod
+		if !strings.Contains(signupMethod, enum.MagicLink.String()) {
+			signupMethod = signupMethod + "," + enum.MagicLink.String()
+		}
+
+		user.SignupMethod = signupMethod
+	}
+
+	user, _ = db.Mgr.SaveUser(user)
+
+	if constants.DISABLE_EMAIL_VERIFICATION != "true" {
+		// insert verification request
+		verificationType := enum.MagicLink.String()
+		token, err := utils.CreateVerificationToken(params.Email, verificationType)
+		if err != nil {
+			log.Println(`Error generating token`, err)
+		}
+		db.Mgr.AddVerification(db.VerificationRequest{
+			Token:      token,
+			Identifier: verificationType,
+			ExpiresAt:  time.Now().Add(time.Minute * 30).Unix(),
+			Email:      params.Email,
+		})
+
+		// exec it as go routin so that we can reduce the api latency
+		go func() {
+			utils.SendVerificationMail(params.Email, token)
+		}()
+	}
+
+	res = &model.Response{
+		Message: `Verification request has been sent. Please check your inbox!`,
+	}
+
+	return res, nil
+}

server/utils/email.go

@@ -74,7 +74,7 @@ func SendVerificationMail(toEmail, token string) error {
                                                                                         <tr style="background: rgb(249,250,251);padding: 10px;margin-bottom:10px;border-radius:5px;">
                                                                                             <td class="esd-block-text es-m-txt-c es-p15t" align="center" style="padding:10px;padding-bottom:30px;">
                                                                                                 <p>Hey there 👋</p>
-                                                                                                <p>We received a request to sign-up for <b>%s</b>. If this is correct, please confirm your email address by clicking the button below.</p> <br/>
+                                                                                                <p>We received a request to sign-up / login for <b>%s</b>. If this is correct, please confirm your email address by clicking the button below.</p> <br/>
                                                                                                 <a href="%s" class="es-button" target="_blank" style="text-decoration: none;padding:10px 15px;background-color: rgba(59,130,246,1);color: #fff;font-size: 1em;border-radius:5px;">Confirm Email</a>
                                                                                             </td>
                                                                                         </tr>

server/utils/meta.go

@@ -16,5 +16,6 @@ func GetMetaInfo() model.Meta {
 		IsTwitterLoginEnabled:        constants.TWITTER_CLIENT_ID != "" && constants.TWITTER_CLIENT_SECRET != "",
 		IsBasicAuthenticationEnabled: constants.DISABLE_BASIC_AUTHENTICATION != "true",
 		IsEmailVerificationEnabled:   constants.DISABLE_EMAIL_VERIFICATION != "true",
+		IsMagicLoginEnabled:          constants.DISABLE_MAGIC_LOGIN != "true",
 	}
 }