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package web
import (
"fmt"
"net/http"
"time"
"github.com/golang-jwt/jwt"
"github.com/hashicorp/uuid"
)
var (
tokens = map[string]string{}
)
type TokenRequest struct {
GrantType string
Code string
RedirectUri string
}
type TokenResponse struct {
AccessToken string
TokenType string
RefreshToken string
ExpiresIn int
IdToken string
}
func (h *HttpContext) Token(w http.ResponseWriter, r *http.Request) {
if r.Method == "POST" {
tr := &TokenRequest{
GrantType: r.FormValue("grant_type"),
Code: r.FormValue("code"),
RedirectUri: r.FormValue("redirect_uri"),
}
if tr.GrantType == "authorization_code" {
// Authorization Code Flow https://openid.net/specs/openid-connect-core-1_0.html#CodeFlowAuth
r := &TokenResponse{
AccessToken: tokens[tr.Code],
TokenType: "Bearer",
RefreshToken: "TODO::",
ExpiresIn: 3600,
IdToken: h.createIdToken(r.FormValue("client_id")),
}
w.Header().Set("Content-Type", "application/json")
w.Header().Set("Cache-Control", "no-store")
w.Header().Set("Pragma", "no-cache")
fmt.Fprintf(w, `{"access_token": "%s","token_type": "%s","refresh_token": "%s","expires_in": %d,"id_token": "%s"}`, r.AccessToken, r.TokenType, r.RefreshToken, r.ExpiresIn, r.IdToken)
} else {
w.WriteHeader(http.StatusNotFound)
fmt.Fprintf(w, "Not Found\n")
}
}
}
func (h *HttpContext) createIdToken(clientId string) string {
now := time.Now()
if clientId == "" {
clientId = "clientId"
}
expiresAt := now.Add(time.Hour * time.Duration(1))
idToken := jwt.NewWithClaims(jwt.SigningMethodRS256, &jwt.StandardClaims{
Issuer: h.cfg.Issuer,
Subject: "1",
Audience: clientId,
ExpiresAt: expiresAt.Unix(),
NotBefore: now.Unix(),
IssuedAt: now.Unix(),
Id: uuid.GenerateUUID(),
})
key, _ := jwt.ParseRSAPrivateKeyFromPEM(h.cfg.KeyData)
signedIdToken, _ := idToken.SignedString(key)
return signedIdToken
}
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