1package main
  2
  3import (
  4	"encoding/json"
  5	"fmt"
  6	"net/http"
  7	"strconv"
  8	"strings"
  9
 10	"gopkg.in/mgo.v2/bson"
 11
 12	ownrsa "./ownrsa"
 13)
 14
 15type User struct {
 16	Id       bson.ObjectId `json:"id" bson:"_id,omitempty"`
 17	Email    string        `json:"email"`
 18	Password string        `json:"password"`
 19	Token    string        `json:"token"`
 20}
 21
 22func Index(w http.ResponseWriter, r *http.Request) {
 23	//TODO return the public key, to allow others verifign signed strings by this server
 24	fmt.Fprintln(w, "serverIDsigner")
 25}
 26
 27func Signup(w http.ResponseWriter, r *http.Request) {
 28
 29	decoder := json.NewDecoder(r.Body)
 30	var user User
 31	err := decoder.Decode(&user)
 32	if err != nil {
 33		panic(err)
 34	}
 35	defer r.Body.Close()
 36
 37	fmt.Print("user signup: ")
 38	fmt.Println(user)
 39
 40	//save the new project to mongodb
 41	rUser := User{}
 42	err = userCollection.Find(bson.M{"email": user.Email}).One(&rUser)
 43	if err != nil {
 44		//user not exists
 45		err = userCollection.Insert(user) //TODO find a way to get the object result when inserting in one line, without need of the two mgo petitions
 46		err = userCollection.Find(bson.M{"email": user.Email}).One(&user)
 47	} else {
 48		//user exists
 49		fmt.Fprintln(w, "User already registered")
 50		return
 51	}
 52
 53	jResp, err := json.Marshal(user)
 54	if err != nil {
 55		panic(err)
 56	}
 57	fmt.Fprintln(w, string(jResp))
 58}
 59
 60func Login(w http.ResponseWriter, r *http.Request) {
 61
 62	decoder := json.NewDecoder(r.Body)
 63	var user User
 64	err := decoder.Decode(&user)
 65	if err != nil {
 66		panic(err)
 67	}
 68	defer r.Body.Close()
 69
 70	fmt.Print("user login: ")
 71	fmt.Println(user)
 72	token, err := newToken()
 73	check(err)
 74	user.Token = token
 75
 76	//save the new project to mongodb
 77	rUser := User{}
 78	err = userCollection.Find(bson.M{"email": user.Email}).One(&rUser)
 79	if err != nil {
 80	} else {
 81		//user exists, update with the token
 82		err = userCollection.Update(bson.M{"_id": rUser.Id}, user)
 83		check(err)
 84	}
 85
 86	jResp, err := json.Marshal(user)
 87	if err != nil {
 88		panic(err)
 89	}
 90	fmt.Fprintln(w, string(jResp))
 91}
 92
 93type Sign struct {
 94	M string `json:"m"`
 95	C string `json:"c"`
 96}
 97
 98type AskBlindSign struct {
 99	PubKString ownrsa.RSAPublicKeyString `json:"pubKstring"`
100	PubK       ownrsa.RSAPublicKey       `json:"pubK"`
101	M          string                    `json:"m"`
102}
103
104func BlindSign(w http.ResponseWriter, r *http.Request) {
105	fmt.Println(r.Body)
106	decoder := json.NewDecoder(r.Body)
107	var askBlindSign AskBlindSign
108	err := decoder.Decode(&askBlindSign)
109	if err != nil {
110		panic(err)
111	}
112	defer r.Body.Close()
113
114	fmt.Println(askBlindSign)
115	askBlindSign.PubK, err = ownrsa.PubKStringToBigInt(askBlindSign.PubKString)
116	if err != nil {
117		fmt.Fprintln(w, "error")
118		return
119	}
120
121	//convert msg to []int
122	var m []int
123	mBytes := []byte(askBlindSign.M)
124	for _, byte := range mBytes {
125		m = append(m, int(byte))
126	}
127
128	sigma := ownrsa.BlindSign(m, askBlindSign.PubK, serverRsa.PrivK) //here the privK will be the CA privK, not the m emmiter's one. The pubK is the user's one
129	fmt.Print("Sigma': ")
130	fmt.Println(sigma)
131
132	fmt.Fprintln(w, sigma)
133}
134
135type PetitionVerifySign struct {
136	M       string `json:"m"`
137	MSigned string `json:"mSigned"`
138}
139
140func VerifySign(w http.ResponseWriter, r *http.Request) {
141	decoder := json.NewDecoder(r.Body)
142	var petitionVerifySign PetitionVerifySign
143	err := decoder.Decode(&petitionVerifySign)
144	if err != nil {
145		panic(err)
146	}
147	defer r.Body.Close()
148
149	fmt.Println(petitionVerifySign)
150
151	//convert M to []int
152	var mOriginal []int
153	mBytes := []byte(petitionVerifySign.M)
154	for _, byte := range mBytes {
155		mOriginal = append(mOriginal, int(byte))
156	}
157
158	//convert MSigned to []int
159	var mSignedInts []int
160	mSignedString := strings.Split(petitionVerifySign.MSigned, " ")
161	for _, s := range mSignedString {
162		i, err := strconv.Atoi(s)
163		check(err)
164		mSignedInts = append(mSignedInts, i)
165	}
166
167	verified := ownrsa.Verify(mOriginal, mSignedInts, serverRsa.PubK)
168
169	fmt.Fprintln(w, verified)
170}