/
main.go
249 lines (224 loc) · 5.98 KB
/
main.go
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package main
import (
"crypto/rsa"
"errors"
"flag"
"io/ioutil"
"log"
"net/http"
"net/http/cookiejar"
"net/url"
"path"
"time"
"github.com/PuerkitoBio/goquery"
"github.com/jinzhu/gorm"
_ "github.com/mattn/go-sqlite3"
)
type User struct {
Username, Password, University string
LastActivated time.Time
Encrypted bool
}
func (u User) Validate() error {
if u.University != "ubc" {
return errors.New("Only UBC is currently supported.")
}
if len(u.Username) == 0 {
return errors.New("Invalid username.")
}
if len(u.Password) == 0 {
return errors.New("Invalid password.")
}
return nil
}
func (u *User) Activate() error {
jar, err := cookiejar.New(nil)
if err != nil {
return err
}
c := &http.Client{
Jar: jar,
}
resp, err := c.PostForm("https://upassbc.translink.ca/", url.Values{"PsiId": {u.University}})
if err != nil {
return err
}
defer resp.Body.Close()
//body, _ := ioutil.ReadAll(resp.Body)
//log.Println(string(body))
// Log into shibboleth
resp2, err := c.PostForm("https://shibboleth2.id.ubc.ca/idp/Authn/UserPassword", url.Values{
"j_username": {u.Username},
"j_password": {u.Password},
"action": {"Continue"},
})
if err != nil {
return err
}
defer resp2.Body.Close()
// Continue SAML
doc, err := goquery.NewDocumentFromResponse(resp2)
if err != nil {
return err
}
action := doc.Find("form").AttrOr("action", "")
relayState := doc.Find("input[name=\"RelayState\"]").AttrOr("value", "")
samlResponse := doc.Find("input[name=\"SAMLResponse\"]").AttrOr("value", "")
resp3, err := c.PostForm(action, url.Values{
"RelayState": {relayState},
"SAMLResponse": {samlResponse},
"action": {"Continue"},
})
if err != nil {
return err
}
defer resp3.Body.Close()
// Continue upassbc login
doc2, err := goquery.NewDocumentFromResponse(resp3)
if err != nil {
return err
}
action = doc2.Find("form").AttrOr("action", "")
wa := doc2.Find("input[name=\"wa\"]").AttrOr("value", "")
wresult := doc2.Find("input[name=\"wresult\"]").AttrOr("value", "")
resp4, err := c.PostForm(action, url.Values{
"wa": {wa},
"wresult": {wresult},
"action": {"Submit"},
})
if err != nil {
return err
}
defer resp4.Body.Close()
doc3, err := goquery.NewDocumentFromResponse(resp4)
if err != nil {
return err
}
if doc3.Find("#form-request").Length() == 0 {
return errors.New("Invalid username or password details.")
}
action = "https://upassbc.translink.ca" + doc3.Find("#form-request").AttrOr("action", "")
vals := url.Values{"requestButton": {"Request"}}
checkboxes := doc3.Find("#form-request input:nth-child(1)[type=\"checkbox\"]")
log.Printf("Activating UPass %s, count %d", u.Username, checkboxes.Length())
if checkboxes.Length() == 0 {
return nil
}
doc3.Find("#form-request input").Each(func(i int, sel *goquery.Selection) {
name := sel.AttrOr("name", "")
val := sel.AttrOr("value", "")
if len(name) == 0 || len(val) == 0 {
return
}
vals[name] = append(vals[name], val)
})
boxName := checkboxes.Last().AttrOr("name", "")
vals[boxName] = append(vals[boxName], "true")
log.Println("vals", vals)
resp5, err := c.PostForm(action, vals)
if err != nil {
return err
}
defer resp5.Body.Close()
body, _ := ioutil.ReadAll(resp5.Body)
log.Println(string(body))
u.LastActivated = time.Now()
return nil
}
func activateEverything(db *gorm.DB, key *rsa.PrivateKey) {
log.Println("Checking for new UPasses...")
var users []*User
db.Find(&users)
for i, user := range users {
if err := user.Decrypt(key); err != nil {
log.Printf("ERR decrypting %s, %s", user.Username, err)
continue
}
if err := user.Activate(); err != nil {
log.Printf("ERR activating %s, %s", user.Username, err)
continue
}
if err := user.Decrypt(key); err != nil {
log.Printf("ERR decrypting %s, %s", user.Username, err)
continue
}
db.Model(user).Update("last_activated", user.LastActivated)
// Remove decrypted version from memory.
users[i] = nil
}
}
func pollActivator(db *gorm.DB, key *rsa.PrivateKey) {
ticker := time.NewTicker(24 * time.Hour)
for _ = range ticker.C {
activateEverything(db, key)
}
}
var addr = flag.String("addr", ":3000", "The address to listen on.")
var dir = flag.String("dir", ".", "the directory to put data in")
func main() {
flag.Parse()
db, err := gorm.Open("sqlite3", path.Join(*dir, "user.db"))
if err != nil {
log.Fatal(err)
}
db.CreateTable(&User{})
db.AutoMigrate(&User{})
var key *rsa.PrivateKey
http.Handle("/", http.FileServer(http.Dir("./static")))
http.HandleFunc("/api/v1/key", func(w http.ResponseWriter, r *http.Request) {
if key != nil {
http.Error(w, "key already decrypted", 400)
return
}
if err := r.ParseForm(); err != nil {
http.Error(w, err.Error(), 400)
return
}
password := r.FormValue("password")
if len(password) == 0 {
http.Error(w, "password must not be empty", 400)
return
}
key, err = readKeyOrGenerate(path.Join(*dir, "db.key"), password)
if err != nil {
http.Error(w, err.Error(), 500)
}
w.Write([]byte("Successfully setup keys."))
go pollActivator(db, key)
go activateEverything(db, key)
})
http.HandleFunc("/api/v1/register", func(w http.ResponseWriter, r *http.Request) {
if key == nil {
http.Error(w, "key needs to be generated or decrypted", 500)
return
}
if err := r.ParseForm(); err != nil {
http.Error(w, err.Error(), 400)
return
}
user := &User{
University: r.FormValue("university"),
Username: r.FormValue("username"),
Password: r.FormValue("password"),
}
if err := user.Validate(); err != nil {
http.Error(w, err.Error(), 400)
return
}
if err := user.Activate(); err != nil {
http.Error(w, err.Error(), 400)
return
}
if err := user.Encrypt(key); err != nil {
http.Error(w, err.Error(), 500)
return
}
if err := db.Create(user).Error; err != nil {
http.Error(w, err.Error(), 500)
return
}
w.Write([]byte("Successfully created renewer."))
})
log.Printf("Listening on %s", *addr)
log.Fatal(http.ListenAndServe(*addr, nil))
}