1package main
  2
  3import (
  4	"encoding/json"
  5	"fmt"
  6	"net/http"
  7	"strconv"
  8	"strings"
  9
 10	"github.com/fatih/color"
 11	"gopkg.in/mgo.v2/bson"
 12
 13	ownrsa "./ownrsa"
 14)
 15
 16type User struct {
 17	Id       bson.ObjectId `json:"id" bson:"_id,omitempty"`
 18	Email    string        `json:"email"`
 19	Password string        `json:"password"`
 20	Token    string        `json:"token"`
 21}
 22
 23func Index(w http.ResponseWriter, r *http.Request) {
 24	//TODO return the public key, to allow others verifign signed strings by this server
 25
 26	jResp, err := json.Marshal(serverRSA.PubK)
 27	if err != nil {
 28		panic(err)
 29	}
 30	fmt.Fprintln(w, string(jResp))
 31}
 32
 33func Signup(w http.ResponseWriter, r *http.Request) {
 34
 35	decoder := json.NewDecoder(r.Body)
 36	var user User
 37	err := decoder.Decode(&user)
 38	if err != nil {
 39		panic(err)
 40	}
 41	defer r.Body.Close()
 42
 43	fmt.Print("user signup: ")
 44	fmt.Println(user)
 45
 46	//save the new project to mongodb
 47	rUser := User{}
 48	err = userCollection.Find(bson.M{"email": user.Email}).One(&rUser)
 49	if err != nil {
 50		//user not exists
 51		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
 52		err = userCollection.Find(bson.M{"email": user.Email}).One(&user)
 53	} else {
 54		//user exists
 55		fmt.Fprintln(w, "User already registered")
 56		return
 57	}
 58
 59	jResp, err := json.Marshal(user)
 60	if err != nil {
 61		panic(err)
 62	}
 63	fmt.Fprintln(w, string(jResp))
 64}
 65
 66func Login(w http.ResponseWriter, r *http.Request) {
 67
 68	decoder := json.NewDecoder(r.Body)
 69	var user User
 70	err := decoder.Decode(&user)
 71	if err != nil {
 72		panic(err)
 73	}
 74	defer r.Body.Close()
 75
 76	fmt.Print("user login: ")
 77	fmt.Println(user)
 78	token, err := newToken()
 79	check(err)
 80	user.Token = token
 81
 82	//save the new project to mongodb
 83	rUser := User{}
 84	err = userCollection.Find(bson.M{"email": user.Email}).One(&rUser)
 85	if err != nil {
 86	} else {
 87		//user exists, update with the token
 88		err = userCollection.Update(bson.M{"_id": rUser.Id}, user)
 89		check(err)
 90	}
 91
 92	jResp, err := json.Marshal(user)
 93	if err != nil {
 94		panic(err)
 95	}
 96	fmt.Fprintln(w, string(jResp))
 97}
 98
 99type Sign struct {
100	M string `json:"m"`
101	C string `json:"c"`
102}
103
104type AskBlindSign struct {
105	/*PubKString ownrsa.RSAPublicKeyString `json:"pubKstring"`
106	PubK       ownrsa.RSAPublicKey       `json:"pubK"`*/
107	M string `json:"m"`
108}
109
110func BlindSign(w http.ResponseWriter, r *http.Request) {
111	decoder := json.NewDecoder(r.Body)
112	var askBlindSign AskBlindSign
113	err := decoder.Decode(&askBlindSign)
114	if err != nil {
115		panic(err)
116	}
117	defer r.Body.Close()
118	color.Red(askBlindSign.M)
119	fmt.Println(askBlindSign)
120
121	/*fmt.Println(askBlindSign)
122	askBlindSign.PubK, err = ownrsa.PubKStringToBigInt(askBlindSign.PubKString)
123	if err != nil {
124		fmt.Fprintln(w, "error")
125		return
126	}*/
127
128	//convert msg to []int
129	/*var m []int
130	mBytes := []byte(askBlindSign.M)
131	for _, byte := range mBytes {
132		m = append(m, int(byte))
133	}*/
134
135	m := ownrsa.StringToArrayInt(askBlindSign.M, "_")
136
137	sigma := ownrsa.BlindSign(m, serverRSA.PrivK) //here the privK will be the CA privK, not the m emmiter's one. The pubK is the user's one
138	fmt.Print("Sigma': ")
139	fmt.Println(sigma)
140	sigmaString := ownrsa.ArrayIntToString(sigma, "_")
141	askBlindSign.M = sigmaString
142
143	jResp, err := json.Marshal(askBlindSign)
144	if err != nil {
145		panic(err)
146	}
147	fmt.Fprintln(w, string(jResp))
148}
149
150type PetitionVerifySign struct {
151	M       string `json:"m"`
152	MSigned string `json:"mSigned"`
153}
154
155func VerifySign(w http.ResponseWriter, r *http.Request) {
156	decoder := json.NewDecoder(r.Body)
157	var petitionVerifySign PetitionVerifySign
158	err := decoder.Decode(&petitionVerifySign)
159	if err != nil {
160		panic(err)
161	}
162	defer r.Body.Close()
163
164	fmt.Println(petitionVerifySign)
165
166	//convert M to []int
167	var mOriginal []int
168	mBytes := []byte(petitionVerifySign.M)
169	for _, byte := range mBytes {
170		mOriginal = append(mOriginal, int(byte))
171	}
172
173	//convert MSigned to []int
174	var mSignedInts []int
175	mSignedString := strings.Split(petitionVerifySign.MSigned, " ")
176	for _, s := range mSignedString {
177		i, err := strconv.Atoi(s)
178		check(err)
179		mSignedInts = append(mSignedInts, i)
180	}
181
182	verified := ownrsa.Verify(mOriginal, mSignedInts, serverRSA.PubK)
183
184	fmt.Fprintln(w, verified)
185}