feat: Enable parsing email_verified from string. (#139)

* Enable parsing email_verified from string.

AWS Cognito will return email_verified from /userinfo endpoint as string.
This fix will accept proper boolean values as well as string values.

Links for reference:
https://forums.aws.amazon.com/thread.jspa?messageID=949441&#949441
https://discuss.elastic.co/t/openid-error-after-authenticating-against-aws-cognito/206018/11

* feat: Enable parsing email_verified from string.

pkg/oidc/introspection.go

@@ -115,7 +115,7 @@ func (u *introspectionResponse) GetEmail() string {
 }
 
 func (u *introspectionResponse) IsEmailVerified() bool {
-	return u.EmailVerified
+	return bool(u.EmailVerified)
 }
 
 func (u *introspectionResponse) GetPhoneNumber() string {
@@ -200,7 +200,7 @@ func (u *introspectionResponse) SetPreferredUsername(name string) {
 
 func (u *introspectionResponse) SetEmail(email string, verified bool) {
 	u.Email = email
-	u.EmailVerified = verified
+	u.EmailVerified = boolString(verified)
 }
 
 func (u *introspectionResponse) SetPhone(phone string, verified bool) {

pkg/oidc/userinfo.go

@@ -154,7 +154,7 @@ func (u *userinfo) GetEmail() string {
 }
 
 func (u *userinfo) IsEmailVerified() bool {
-	return u.EmailVerified
+	return bool(u.EmailVerified)
 }
 
 func (u *userinfo) GetPhoneNumber() string {
@@ -235,7 +235,7 @@ func (u *userinfo) SetPreferredUsername(name string) {
 
 func (u *userinfo) SetEmail(email string, verified bool) {
 	u.Email = email
-	u.EmailVerified = verified
+	u.EmailVerified = boolString(verified)
 }
 
 func (u *userinfo) SetPhone(phone string, verified bool) {
@@ -296,8 +296,22 @@ type userInfoProfile struct {
 }
 
 type userInfoEmail struct {
-	Email         string `json:"email,omitempty"`
+	Email string `json:"email,omitempty"`
-	EmailVerified bool   `json:"email_verified,omitempty"`
+
+	// Handle providers that return email_verified as a string
+	// https://forums.aws.amazon.com/thread.jspa?messageID=949441&#949441
+	// https://discuss.elastic.co/t/openid-error-after-authenticating-against-aws-cognito/206018/11
+	EmailVerified boolString `json:"email_verified,omitempty"`
+}
+
+type boolString bool
+
+func (bs *boolString) UnmarshalJSON(data []byte) error {
+	if string(data) == "true" || string(data) == `"true"` {
+		*bs = true
+	}
+
+	return nil
 }
 
 type userInfoPhone struct {
@@ -324,6 +338,7 @@ func NewUserInfoAddress(streetAddress, locality, region, postalCode, country, fo
 		Formatted:     formatted,
 	}
 }
+
 func (i *userinfo) MarshalJSON() ([]byte, error) {
 	type Alias userinfo
 	a := &struct {

pkg/oidc/userinfo_test.go

@@ -2,8 +2,9 @@ package oidc
 
 import (
 	"encoding/json"
-	"github.com/stretchr/testify/assert"
 	"testing"
+
+	"github.com/stretchr/testify/assert"
 )
 
 func TestUserInfoMarshal(t *testing.T) {
@@ -24,3 +25,59 @@ func TestUserInfoMarshal(t *testing.T) {
 	assert.NoError(t, err)
 	assert.Equal(t, expected, marshal)
 }
+
+func TestUserInfoEmailVerifiedUnmarshal(t *testing.T) {
+	t.Parallel()
+
+	t.Run("unmarsha email_verified from json bool true", func(t *testing.T) {
+		jsonBool := []byte(`{"email": "my@email.com", "email_verified": true}`)
+
+		var uie userInfoEmail
+
+		err := json.Unmarshal(jsonBool, &uie)
+		assert.NoError(t, err)
+		assert.Equal(t, userInfoEmail{
+			Email:         "my@email.com",
+			EmailVerified: true,
+		}, uie)
+	})
+
+	t.Run("unmarsha email_verified from json string true", func(t *testing.T) {
+		jsonBool := []byte(`{"email": "my@email.com", "email_verified": "true"}`)
+
+		var uie userInfoEmail
+
+		err := json.Unmarshal(jsonBool, &uie)
+		assert.NoError(t, err)
+		assert.Equal(t, userInfoEmail{
+			Email:         "my@email.com",
+			EmailVerified: true,
+		}, uie)
+	})
+
+	t.Run("unmarsha email_verified from json bool false", func(t *testing.T) {
+		jsonBool := []byte(`{"email": "my@email.com", "email_verified": false}`)
+
+		var uie userInfoEmail
+
+		err := json.Unmarshal(jsonBool, &uie)
+		assert.NoError(t, err)
+		assert.Equal(t, userInfoEmail{
+			Email:         "my@email.com",
+			EmailVerified: false,
+		}, uie)
+	})
+
+	t.Run("unmarsha email_verified from json string false", func(t *testing.T) {
+		jsonBool := []byte(`{"email": "my@email.com", "email_verified": "false"}`)
+
+		var uie userInfoEmail
+
+		err := json.Unmarshal(jsonBool, &uie)
+		assert.NoError(t, err)
+		assert.Equal(t, userInfoEmail{
+			Email:         "my@email.com",
+			EmailVerified: false,
+		}, uie)
+	})
+}