69 lines
1.5 KiB
Go
69 lines
1.5 KiB
Go
package providers
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import (
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"encoding/base64"
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"net/url"
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"strings"
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"github.com/bitly/go-simplejson"
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)
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type GoogleProvider struct {
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*ProviderData
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}
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func NewGoogleProvider(p *ProviderData) *GoogleProvider {
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p.ProviderName = "Google"
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if p.LoginUrl.String() == "" {
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p.LoginUrl = &url.URL{Scheme: "https",
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Host: "accounts.google.com",
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Path: "/o/oauth2/auth"}
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}
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if p.RedeemUrl.String() == "" {
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p.RedeemUrl = &url.URL{Scheme: "https",
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Host: "accounts.google.com",
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Path: "/o/oauth2/token"}
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}
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if p.ValidateUrl.String() == "" {
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p.ValidateUrl = &url.URL{Scheme: "https",
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Host: "www.googleapis.com",
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Path: "/oauth2/v1/tokeninfo"}
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}
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if p.Scope == "" {
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p.Scope = "profile email"
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}
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return &GoogleProvider{ProviderData: p}
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}
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func (s *GoogleProvider) GetEmailAddress(auth_response *simplejson.Json,
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unused_access_token string) (string, error) {
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idToken, err := auth_response.Get("id_token").String()
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if err != nil {
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return "", err
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}
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// id_token is a base64 encode ID token payload
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// https://developers.google.com/accounts/docs/OAuth2Login#obtainuserinfo
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jwt := strings.Split(idToken, ".")
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b, err := jwtDecodeSegment(jwt[1])
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if err != nil {
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return "", err
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}
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data, err := simplejson.NewJson(b)
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if err != nil {
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return "", err
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}
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email, err := data.Get("email").String()
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if err != nil {
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return "", err
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}
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return email, nil
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}
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func jwtDecodeSegment(seg string) ([]byte, error) {
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if l := len(seg) % 4; l > 0 {
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seg += strings.Repeat("=", 4-l)
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}
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return base64.URLEncoding.DecodeString(seg)
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}
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