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alipay.go
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alipay.go
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// Package alipay implements the OAuth2 protocol for authenticating users through Alipay.
// This package can be used as a reference implementation of an OAuth2 provider for Goth.
package alipay
import (
"bytes"
"crypto/rsa"
"encoding/json"
"errors"
"fmt"
"io"
"net/http"
"net/url"
"strings"
"sync"
"time"
"github.com/admpub/goth"
"github.com/smartwalle/crypto4go"
oauth2c "github.com/coscms/oauth2s/client/goth/oauth2"
"golang.org/x/oauth2"
)
// These vars define the Authentication, Token, and API URLS for GitHub. If
// using GitHub enterprise you should change these values before calling New.
var (
SandBoxAuthURL = "https://openauth.alipaydev.com/oauth2/publicAppAuthorize.htm"
SandBoxAPIURL = "https://openapi.alipaydev.com/gateway.do"
AuthURL = "https://openauth.alipay.com/oauth2/publicAppAuthorize.htm"
APIURL = "https://openapi.alipay.com/gateway.do"
)
// New creates a new Github provider, and sets up important connection details.
// You should always call `github.New` to get a new Provider. Never try to create
// one manually.
func New(clientKey, secret, callbackURL string, isProduction bool, scopes ...string) *Provider {
var apiURL, authURL string
if isProduction {
apiURL = APIURL
authURL = AuthURL
} else {
apiURL = SandBoxAPIURL
authURL = SandBoxAuthURL
}
return NewCustomisedURL(clientKey, secret, callbackURL, authURL, apiURL, scopes...)
}
// NewCustomisedURL is similar to New(...) but can be used to set custom URLs to connect to
func NewCustomisedURL(clientKey, privateKey, callbackURL, authURL string, apiURL string, scopes ...string) *Provider {
p := &Provider{
ClientKey: clientKey,
Secret: privateKey,
CallbackURL: callbackURL,
HTTPClient: oauth2c.DefaultClient,
providerName: "alipay",
profileURL: apiURL,
}
if len(scopes) == 0 {
scopes = []string{`auth_user`}
}
p.config = newConfig(p, authURL, apiURL, scopes)
return p
}
// Provider is the implementation of `goth.Provider` for accessing Github.
type Provider struct {
ClientKey string
Secret string
CallbackURL string
HTTPClient *http.Client
config *oauth2.Config
providerName string
profileURL string
debug bool
appPrivateKey *rsa.PrivateKey // 应用私钥
once sync.Once
}
// Name is the name used to retrieve this provider later.
func (p *Provider) Name() string {
return p.providerName
}
func (p *Provider) parsePrivateKey() error {
priKey, err := crypto4go.ParsePKCS1PrivateKey(crypto4go.FormatPKCS1PrivateKey(p.Secret))
if err != nil {
priKey, err = crypto4go.ParsePKCS8PrivateKey(crypto4go.FormatPKCS8PrivateKey(p.Secret))
if err != nil {
return err
}
}
p.appPrivateKey = priKey
return nil
}
// SetName is to update the name of the provider (needed in case of multiple providers of 1 type)
func (p *Provider) SetName(name string) {
p.providerName = name
}
func (p *Provider) Client() *http.Client {
return goth.HTTPClientWithFallBack(p.HTTPClient)
}
func (p *Provider) createSign(params url.Values) (string, error) {
var err error
p.once.Do(func() {
err = p.parsePrivateKey()
})
if err != nil {
return "", err
}
if params.Get(`sign_type`) == `RSA` {
return SignRSA(params, p.appPrivateKey)
}
return SignRSA2(params, p.appPrivateKey)
}
func (p *Provider) urlParams(method string, params url.Values, extra interface{}, scopes ...string) (url.Values, error) {
if len(method) == 0 {
method = `alipay.system.oauth.token`
}
params.Set("charset", "utf-8")
params.Set("app_id", p.ClientKey)
params.Set("method", method)
params.Set("scope", strings.Join(scopes, `,`))
params.Set("format", "JSON")
if extra != nil {
b, err := json.Marshal(extra)
if err != nil {
return nil, err
}
params.Set("biz_content", string(b))
}
params.Set("sign_type", "RSA2")
params.Set("timestamp", time.Now().Local().Format(`2006-01-02 15:04:05`))
params.Set("version", "1.0")
sign, err := p.createSign(params)
if err != nil {
return nil, err
}
params.Set("sign", sign)
return params, nil
}
// Debug is sandbox mode
func (p *Provider) Debug(debug bool) {
p.debug = debug
}
// BeginAuth asks Github for an authentication end-point.
// documentation https://opensupport.alipay.com/support/helpcenter/166/201602504335?ant_source=zsearch#
func (p *Provider) BeginAuth(state string) (goth.Session, error) {
//url := p.config.AuthCodeURL(state)
params := url.Values{
"app_id": {p.ClientKey},
"scope": {"auth_user"},
"redirect_uri": {p.CallbackURL},
"state": {state},
}
session := &Session{
//https://openauth.alipay.com/oauth2/publicAppAuthorize.htm?app_id=商户的APPID&scope=auth_user&redirect_uri=ENCODED_URL&state=init
AuthURL: p.config.Endpoint.AuthURL + `?` + params.Encode(),
}
return session, nil
}
// FetchUser will go to Github and access basic information about the user.
// documentation https://opendocs.alipay.com/apis/api_2/alipay.user.info.share
func (p *Provider) FetchUser(session goth.Session) (goth.User, error) {
sess := session.(*Session)
user := goth.User{
AccessToken: sess.AccessToken,
RefreshToken: sess.RefreshToken,
UserID: sess.OpenID,
ExpiresAt: sess.Expiry,
Provider: p.Name(),
RawData: make(map[string]interface{}),
}
if user.AccessToken == "" {
// data is not yet retrieved since accessToken is still empty
return user, fmt.Errorf("%s cannot get user information without accessToken", p.providerName)
}
param := url.Values{
"auth_token": {sess.AccessToken},
}
var err error
param, err = p.urlParams(`alipay.user.info.share`, param, nil, `auth_user`)
if err != nil {
return user, err
}
response, err := p.Client().Get(p.profileURL + `?` + param.Encode())
if err != nil {
return user, err
}
defer response.Body.Close()
if response.StatusCode != http.StatusOK {
return user, fmt.Errorf("Alipay API responded with a %d trying to fetch user information", response.StatusCode)
}
bits, err := io.ReadAll(response.Body)
if err != nil {
return user, err
}
err = json.NewDecoder(bytes.NewReader(bits)).Decode(&user.RawData)
if err != nil {
return user, err
}
err = userFromReader(bytes.NewReader(bits), &user)
return user, err
}
const codeSuccess = `10000`
func userFromReader(reader io.Reader, user *goth.User) error {
/*
{
"alipay_user_info_share_response": {
"code": "10000",
"msg": "Success",
"user_id": "2088102104794936",
"avatar": "http://tfsimg.alipay.com/images/partner/T1uIxXXbpXXXXXXXX",
"province": "安徽省",
"city": "安庆",
"nick_name": "支付宝小二",
"gender": "F"
},
"sign": "ERITJKEIJKJHKKKKKKKHJEREEEEEEEEEEE"
}
*/
u := struct {
Response struct {
Code string `json:"code"`
Msg string `json:"msg"`
Name string `json:"nick_name"`
AvatarURL string `json:"avatar"`
Gender string `json:"gender"`
Province string `json:"province"` // 省份名称
City string `json:"city"` // 城市名称
UserID string `json:"user_id"` // 支付宝用户userId 最大长度16位
} `json:"alipay_user_info_share_response"`
Sign string `json:"sign"`
}{}
err := json.NewDecoder(reader).Decode(&u)
if err != nil {
return err
}
if u.Response.Code != codeSuccess {
return errors.New(u.Response.Msg)
}
user.Name = u.Response.Name
user.NickName = u.Response.Name
user.AvatarURL = u.Response.AvatarURL
user.RawData[`gender`] = u.Response.Gender
if len(u.Response.Province) > 0 && len(u.Response.City) > 0 {
user.Location = u.Response.Province + `,` + u.Response.City
}
user.IDToken = u.Response.UserID
if len(u.Response.UserID) > 0 {
user.UserID = u.Response.UserID
}
return err
}
func newConfig(provider *Provider, authURL, tokenURL string, scopes []string) *oauth2.Config {
c := &oauth2.Config{
ClientID: provider.ClientKey,
ClientSecret: provider.Secret,
RedirectURL: provider.CallbackURL,
Endpoint: oauth2.Endpoint{
AuthURL: authURL,
TokenURL: tokenURL,
},
Scopes: []string{},
}
for _, scope := range scopes {
c.Scopes = append(c.Scopes, scope)
}
return c
}
// RefreshToken refresh token is not provided by QQ
func (p *Provider) RefreshToken(refreshToken string) (*oauth2.Token, error) {
return nil, errors.New("Refresh token is not provided by alipay")
}
// RefreshTokenAvailable refresh token is not provided by QQ
func (p *Provider) RefreshTokenAvailable() bool {
return false
}