@@ -1,1 +1,2 @@
 tests
+peer/blockchain.data

@@ -17,6 +17,7 @@ - the peers of the p2p network that runs the blockchain
 - serverCA
     - Is a REST server that has been certified (is the Certified Authority) to validate the peers that will be able to participate of the blockchain.
     - Have the webapp (frontend) to validate peers through a GUI interface
+    - The GUI frontend webapp allows also to view the current peers of the network and the blocks of the blockchain
 - server-ID-signer
     - The server where the user creates a non anonymous account
     - Also is the server that blind signs the Anonymous ID of the users

@@ -1,1 +0,0 @@
-blockchain.data

@@ -1,1 +1,1 @@
-{"genesisblock":"YKWAWY6GM5xrLhYrfi6hAmPmsECUH83n7xVcgaguLF4=","lastupdate":"0001-01-01T00:00:00Z","blocks":[{"hash":"YKWAWY6GM5xrLhYrfi6hAmPmsECUH83n7xVcgaguLF4=","height":0,"date":"2017-11-29T10:42:55.112675187+01:00","previoushash":"","nexthash":"cSN48a9BwgJQZdz2NwBRPJqCtC4Qtv-l-RYeGl9eBZs=","data":[{"address":"firstaddress"}],"emitter":"VOnL-15rFsUiCnRoyGFksKvWKcwNBRz5iarRem0Ilvo="},{"hash":"cSN48a9BwgJQZdz2NwBRPJqCtC4Qtv-l-RYeGl9eBZs=","height":1,"date":"2017-11-29T23:07:43.169204719+01:00","previoushash":"YKWAWY6GM5xrLhYrfi6hAmPmsECUH83n7xVcgaguLF4=","nexthash":"Ql0MH8WVaCOXzRWmR5xUyAQXaQ5Ovt6PoN3HrkHmYmk=","data":[{"address":"firstaddress"}],"emitter":"VOnL-15rFsUiCnRoyGFksKvWKcwNBRz5iarRem0Ilvo="},{"hash":"Ql0MH8WVaCOXzRWmR5xUyAQXaQ5Ovt6PoN3HrkHmYmk=","height":2,"date":"2017-12-26T14:38:41.446523607+01:00","previoushash":"cSN48a9BwgJQZdz2NwBRPJqCtC4Qtv-l-RYeGl9eBZs=","nexthash":"64bzp4j5jJjCcvKYcsytJOKD5dFyMHUjtNY1S5TD8Sk=","data":[{"address":"firstaddress"}],"emitter":"VOnL-15rFsUiCnRoyGFksKvWKcwNBRz5iarRem0Ilvo="},{"hash":"64bzp4j5jJjCcvKYcsytJOKD5dFyMHUjtNY1S5TD8Sk=","height":3,"date":"2017-12-26T18:05:05.541862456+01:00","previoushash":"Ql0MH8WVaCOXzRWmR5xUyAQXaQ5Ovt6PoN3HrkHmYmk=","nexthash":"N-w5F0pRA0kpZx7JDS3RPBedUSq1Kyk13Pc1guhY7Ws=","data":[{"address":"firstaddress"}],"emitter":"VOnL-15rFsUiCnRoyGFksKvWKcwNBRz5iarRem0Ilvo="},{"hash":"N-w5F0pRA0kpZx7JDS3RPBedUSq1Kyk13Pc1guhY7Ws=","height":4,"date":"2017-12-26T18:06:13.953399725+01:00","previoushash":"64bzp4j5jJjCcvKYcsytJOKD5dFyMHUjtNY1S5TD8Sk=","nexthash":"45Otq5P8WR97T4SxvaFk_0icNdUcIzO-mTjn6wrxJd4=","data":[{"address":"firstaddress"}],"emitter":"VOnL-15rFsUiCnRoyGFksKvWKcwNBRz5iarRem0Ilvo="},{"hash":"45Otq5P8WR97T4SxvaFk_0icNdUcIzO-mTjn6wrxJd4=","height":5,"date":"2017-12-26T18:06:57.93092362+01:00","previoushash":"N-w5F0pRA0kpZx7JDS3RPBedUSq1Kyk13Pc1guhY7Ws=","nexthash":"","data":[{"address":"firstaddress"}],"emitter":"VOnL-15rFsUiCnRoyGFksKvWKcwNBRz5iarRem0Ilvo="}]}+{"genesisblock":"YKWAWY6GM5xrLhYrfi6hAmPmsECUH83n7xVcgaguLF4=","lastupdate":"0001-01-01T00:00:00Z","blocks":[{"hash":"YKWAWY6GM5xrLhYrfi6hAmPmsECUH83n7xVcgaguLF4=","height":0,"date":"2017-11-29T10:42:55.112675187+01:00","previoushash":"","nexthash":"cSN48a9BwgJQZdz2NwBRPJqCtC4Qtv-l-RYeGl9eBZs=","data":[{"address":"firstaddress"}],"emitter":"VOnL-15rFsUiCnRoyGFksKvWKcwNBRz5iarRem0Ilvo="},{"hash":"cSN48a9BwgJQZdz2NwBRPJqCtC4Qtv-l-RYeGl9eBZs=","height":1,"date":"2017-11-29T23:07:43.169204719+01:00","previoushash":"YKWAWY6GM5xrLhYrfi6hAmPmsECUH83n7xVcgaguLF4=","nexthash":"Ql0MH8WVaCOXzRWmR5xUyAQXaQ5Ovt6PoN3HrkHmYmk=","data":[{"address":"firstaddress"}],"emitter":"VOnL-15rFsUiCnRoyGFksKvWKcwNBRz5iarRem0Ilvo="},{"hash":"Ql0MH8WVaCOXzRWmR5xUyAQXaQ5Ovt6PoN3HrkHmYmk=","height":2,"date":"2017-12-26T14:38:41.446523607+01:00","previoushash":"cSN48a9BwgJQZdz2NwBRPJqCtC4Qtv-l-RYeGl9eBZs=","nexthash":"64bzp4j5jJjCcvKYcsytJOKD5dFyMHUjtNY1S5TD8Sk=","data":[{"address":"firstaddress"}],"emitter":"VOnL-15rFsUiCnRoyGFksKvWKcwNBRz5iarRem0Ilvo="},{"hash":"64bzp4j5jJjCcvKYcsytJOKD5dFyMHUjtNY1S5TD8Sk=","height":3,"date":"2017-12-26T18:05:05.541862456+01:00","previoushash":"Ql0MH8WVaCOXzRWmR5xUyAQXaQ5Ovt6PoN3HrkHmYmk=","nexthash":"N-w5F0pRA0kpZx7JDS3RPBedUSq1Kyk13Pc1guhY7Ws=","data":[{"address":"firstaddress"}],"emitter":"VOnL-15rFsUiCnRoyGFksKvWKcwNBRz5iarRem0Ilvo="},{"hash":"N-w5F0pRA0kpZx7JDS3RPBedUSq1Kyk13Pc1guhY7Ws=","height":4,"date":"2017-12-26T18:06:13.953399725+01:00","previoushash":"64bzp4j5jJjCcvKYcsytJOKD5dFyMHUjtNY1S5TD8Sk=","nexthash":"45Otq5P8WR97T4SxvaFk_0icNdUcIzO-mTjn6wrxJd4=","data":[{"address":"firstaddress"}],"emitter":"VOnL-15rFsUiCnRoyGFksKvWKcwNBRz5iarRem0Ilvo="},{"hash":"45Otq5P8WR97T4SxvaFk_0icNdUcIzO-mTjn6wrxJd4=","height":5,"date":"2017-12-26T18:06:57.93092362+01:00","previoushash":"N-w5F0pRA0kpZx7JDS3RPBedUSq1Kyk13Pc1guhY7Ws=","nexthash":"xnXIWKAsIHTOwzWDJe-5daa_5bOSPTLbsG5Ft49g3XA=","data":[{"address":"firstaddress"}],"emitter":"VOnL-15rFsUiCnRoyGFksKvWKcwNBRz5iarRem0Ilvo="},{"hash":"xnXIWKAsIHTOwzWDJe-5daa_5bOSPTLbsG5Ft49g3XA=","height":6,"date":"2017-12-26T20:11:10.182353841+01:00","previoushash":"45Otq5P8WR97T4SxvaFk_0icNdUcIzO-mTjn6wrxJd4=","nexthash":"U-Yz_cpPe6Cm4U9zMunLWH2s5hvUFLHJn7_u_3680Cs=","data":[{"address":"firstaddress"}],"emitter":"VOnL-15rFsUiCnRoyGFksKvWKcwNBRz5iarRem0Ilvo="},{"hash":"U-Yz_cpPe6Cm4U9zMunLWH2s5hvUFLHJn7_u_3680Cs=","height":7,"date":"2017-12-26T21:08:30.923107227+01:00","previoushash":"xnXIWKAsIHTOwzWDJe-5daa_5bOSPTLbsG5Ft49g3XA=","nexthash":"zlsDiXG2raTI2tear0LtIQV72BtHTXLzQGV623_CUDc=","data":[{"address":"firstaddress"}],"emitter":"VOnL-15rFsUiCnRoyGFksKvWKcwNBRz5iarRem0Ilvo="},{"hash":"zlsDiXG2raTI2tear0LtIQV72BtHTXLzQGV623_CUDc=","height":8,"date":"2017-12-26T21:08:45.373348196+01:00","previoushash":"U-Yz_cpPe6Cm4U9zMunLWH2s5hvUFLHJn7_u_3680Cs=","nexthash":"MordV-LXcl8AfW5gVq1wHxLHr3EZn7KhWcRJDEamVbA=","data":[{"address":"firstaddress"}],"emitter":"VOnL-15rFsUiCnRoyGFksKvWKcwNBRz5iarRem0Ilvo="},{"hash":"MordV-LXcl8AfW5gVq1wHxLHr3EZn7KhWcRJDEamVbA=","height":9,"date":"2017-12-26T21:08:59.694290728+01:00","previoushash":"zlsDiXG2raTI2tear0LtIQV72BtHTXLzQGV623_CUDc=","nexthash":"gRhKt8ZRKbDFLr-rSEnipo3QI3loQwTjkNoK0G96Z-w=","data":[{"address":"firstaddress"}],"emitter":"VOnL-15rFsUiCnRoyGFksKvWKcwNBRz5iarRem0Ilvo="},{"hash":"gRhKt8ZRKbDFLr-rSEnipo3QI3loQwTjkNoK0G96Z-w=","height":10,"date":"2017-12-26T21:12:18.832944058+01:00","previoushash":"MordV-LXcl8AfW5gVq1wHxLHr3EZn7KhWcRJDEamVbA=","nexthash":"NQMu54PaN9Ph9Qh2VJb9q6hHbENPYfS62YVkjTs0F1k=","data":[{"address":"firstaddress"}],"emitter":"VOnL-15rFsUiCnRoyGFksKvWKcwNBRz5iarRem0Ilvo="},{"hash":"NQMu54PaN9Ph9Qh2VJb9q6hHbENPYfS62YVkjTs0F1k=","height":11,"date":"2017-12-26T21:12:40.460894962+01:00","previoushash":"gRhKt8ZRKbDFLr-rSEnipo3QI3loQwTjkNoK0G96Z-w=","nexthash":"","data":[{"address":"firstaddress"}],"emitter":"VOnL-15rFsUiCnRoyGFksKvWKcwNBRz5iarRem0Ilvo="}]}

@@ -5,6 +5,7 @@ tmux split-window -d -t 0 -v
 tmux split-window -d -t 0 -h
 tmux split-window -d -t 0 -v
 tmux split-window -d -t 2 -v
+tmux split-window -d -t 4 -h
 
 tmux send-keys -t 0 'cd peer && go run *.go server 3001 3002' enter
 sleep 2
@@ -14,5 +15,6 @@ tmux send-keys -t 1 'cd peer && go run *.go client 3003 3004' enter
 tmux send-keys -t 2 'cd peer && go run *.go client 3005 3006' enter
 tmux send-keys -t 3 'cd peer && go run *.go client 3007 3008' enter
 tmux send-keys -t 4 'cd serverCA && go run *.go' enter
+tmux send-keys -t 5 'cd serverIDsigner && go run *.go' enter
 
 tmux attach

@@ -4,9 +4,5 @@ "port": "3030",
     "serverip": "127.0.0.1",
     "serverport": "3000",
     "serverrestport": "3002",
-    "webserverport": "3080",
-    "mongodb": {
-        "ip": "127.0.0.1:27017",
-        "database": "serverCA"
-    }
+    "webserverport": "3080"
 }

@@ -6,8 +6,6 @@ "net"
 	"net/http"
 	"time"
 
-	mgo "gopkg.in/mgo.v2"
-
 	"github.com/fatih/color"
 	"github.com/gorilla/handlers"
 )
@@ -28,21 +26,12 @@ }
 
 var peersList PeersList
 
-var userCollection *mgo.Collection
-
 func main() {
 	color.Blue("Starting CA")
 
 	//read configuration file
 	readConfig("config.json")
 	reconstructBlockchainFromBlock("http://"+config.IP+":"+config.ServerRESTPort, "")
-
-	initializeToken()
-
-	//mongodb
-	session, err := getSession()
-	check(err)
-	userCollection = getCollection(session, "users")
 
 	//run thw webserver
 	go webserver()

@@ -7,17 +7,12 @@ )
 
 //Config reads the config
 type Config struct {
-	IP             string      `json:"ip"`
-	Port           string      `json:"port"`
-	ServerIP       string      `json:"serverip"`
-	ServerPort     string      `json:"serverport"`
-	ServerRESTPort string      `json:"serverrestport"`
-	WebServerPort  string      `json:"webserverport"`
-	Mongodb        MongoConfig `json:"mongodb"`
-}
-type MongoConfig struct {
-	IP       string `json:"ip"`
-	Database string `json:"database"`
+	IP             string `json:"ip"`
+	Port           string `json:"port"`
+	ServerIP       string `json:"serverip"`
+	ServerPort     string `json:"serverport"`
+	ServerRESTPort string `json:"serverrestport"`
+	WebServerPort  string `json:"webserverport"`
 }
 
 var config Config

@@ -21,35 +21,4 @@ "GET",
 		"/blockchain",
 		GetBlockchain,
 	},
-	/*
-		POST	/signup
-		POST	/loginuser
-		POST	/blindsign
-		POST	/verifysign
-
-	*/
-	Route{
-		"Signup",
-		"POST",
-		"/signup",
-		Signup,
-	},
-	Route{
-		"Login",
-		"POST",
-		"/login",
-		Login,
-	},
-	Route{
-		"BlindSign",
-		"POST",
-		"/blindsign",
-		BlindSign,
-	},
-	Route{
-		"VerifySign",
-		"POST",
-		"/verifysign",
-		VerifySign,
-	},
 }

@@ -1,3 +0,0 @@
-curl -X POST http://127.0.0.1:3030/signup -d '{"email": "user1@e.com", "password": "user1"}'
-
-curl -X POST http://127.0.0.1:3030/login -d '{"email": "user1@e.com", "password": "user1"}'

@@ -1,127 +0,0 @@
-package main
-
-import (
-	"encoding/json"
-	"fmt"
-	"net/http"
-
-	"gopkg.in/mgo.v2/bson"
-)
-
-type User struct {
-	Id       bson.ObjectId `json:"id" bson:"_id,omitempty"`
-	Email    string        `json:"email"`
-	Password string        `json:"password"`
-	Token    string        `json:"token"`
-}
-
-func Signup(w http.ResponseWriter, r *http.Request) {
-	//ipFilter(w, r)
-
-	decoder := json.NewDecoder(r.Body)
-	var user User
-	err := decoder.Decode(&user)
-	if err != nil {
-		panic(err)
-	}
-	defer r.Body.Close()
-
-	fmt.Print("user signup: ")
-	fmt.Println(user)
-
-	//save the new project to mongodb
-	rUser := User{}
-	err = userCollection.Find(bson.M{"email": user.Email}).One(&rUser)
-	if err != nil {
-		//user not exists
-		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
-		err = userCollection.Find(bson.M{"email": user.Email}).One(&user)
-	} else {
-		//user exists
-		fmt.Fprintln(w, "User already registered")
-		return
-	}
-
-	jResp, err := json.Marshal(user)
-	if err != nil {
-		panic(err)
-	}
-	fmt.Fprintln(w, string(jResp))
-}
-
-func Login(w http.ResponseWriter, r *http.Request) {
-	//ipFilter(w, r)
-
-	decoder := json.NewDecoder(r.Body)
-	var user User
-	err := decoder.Decode(&user)
-	if err != nil {
-		panic(err)
-	}
-	defer r.Body.Close()
-
-	fmt.Print("user login: ")
-	fmt.Println(user)
-	token, err := newToken()
-	check(err)
-	user.Token = token
-
-	//save the new project to mongodb
-	rUser := User{}
-	err = userCollection.Find(bson.M{"email": user.Email}).One(&rUser)
-	if err != nil {
-	} else {
-		//user exists, update with the token
-		err = userCollection.Update(bson.M{"_id": rUser.Id}, user)
-		check(err)
-	}
-	//generate the token
-	//add the token to the user
-	//save the user with the new token
-
-	jResp, err := json.Marshal(user)
-	if err != nil {
-		panic(err)
-	}
-	fmt.Fprintln(w, string(jResp))
-}
-
-type Sign struct {
-	M string `json:"m"`
-	C string `json:"c"`
-}
-
-func BlindSign(w http.ResponseWriter, r *http.Request) {
-	//ipFilter(w, r)
-
-	decoder := json.NewDecoder(r.Body)
-	var user User
-	err := decoder.Decode(&user)
-	if err != nil {
-		panic(err)
-	}
-	defer r.Body.Close()
-
-	jResp, err := json.Marshal(user)
-	if err != nil {
-		panic(err)
-	}
-	fmt.Fprintln(w, string(jResp))
-}
-func VerifySign(w http.ResponseWriter, r *http.Request) {
-	//ipFilter(w, r)
-
-	decoder := json.NewDecoder(r.Body)
-	var user User
-	err := decoder.Decode(&user)
-	if err != nil {
-		panic(err)
-	}
-	defer r.Body.Close()
-
-	jResp, err := json.Marshal(user)
-	if err != nil {
-		panic(err)
-	}
-	fmt.Fprintln(w, string(jResp))
-}

@@ -0,0 +1,5 @@
+# serverIDsign
+
+- The server where the user creates a non anonymous account
+- Also is the server that blind signs the Anonymous ID of the users
+- Have the webapp (frontend) to interact through a GUI interface

@@ -0,0 +1,9 @@
+{
+    "ip": "127.0.0.1",
+    "port": "3130",
+    "webserverport": "3180",
+    "mongodb": {
+        "ip": "127.0.0.1:27017",
+        "database": "serverIDsigner"
+    }
+}

@@ -0,0 +1,15 @@
+package main
+
+import (
+	"log"
+	"runtime"
+)
+
+func check(err error) {
+	if err != nil {
+		_, fn, line, _ := runtime.Caller(1)
+		log.Println(line)
+		log.Println(fn)
+		log.Println(err)
+	}
+}

@@ -0,0 +1,24 @@
+package main
+
+import (
+	"io"
+	"log"
+	"os"
+	"strings"
+	"time"
+)
+
+func savelog() {
+	timeS := time.Now().String()
+	_ = os.Mkdir("logs", os.ModePerm)
+	//next 3 lines are to avoid windows filesystem errors
+	timeS = strings.Replace(timeS, " ", "_", -1)
+	timeS = strings.Replace(timeS, ".", "-", -1)
+	timeS = strings.Replace(timeS, ":", "-", -1)
+	logFile, err := os.OpenFile("logs/log-"+timeS+".log", os.O_CREATE|os.O_APPEND|os.O_RDWR, 0666)
+	if err != nil {
+		panic(err)
+	}
+	mw := io.MultiWriter(os.Stdout, logFile)
+	log.SetOutput(mw)
+}

@@ -0,0 +1,58 @@
+package main
+
+import (
+	"fmt"
+	"log"
+	"net/http"
+
+	mgo "gopkg.in/mgo.v2"
+
+	"github.com/fatih/color"
+	"github.com/gorilla/handlers"
+
+	ownrsa "./ownrsa"
+)
+
+var userCollection *mgo.Collection
+
+var serverRsa ownrsa.RSA
+
+func main() {
+	color.Blue("Starting serverIDsigner")
+
+	//read configuration file
+	readConfig("config.json")
+
+	initializeToken()
+
+	//initialize RSA
+	serverRsa = ownrsa.GenerateKeyPair()
+	color.Blue("Public Key:")
+	fmt.Println(serverRsa.PubK)
+	color.Green("Private Key:")
+	fmt.Println(serverRsa.PrivK)
+
+	//mongodb
+	session, err := getSession()
+	check(err)
+	userCollection = getCollection(session, "users")
+
+	//run thw webserver
+	go webserver()
+
+	//run API
+	log.Println("api server running")
+	log.Print("port: ")
+	log.Println(config.Port)
+	router := NewRouter()
+	headersOk := handlers.AllowedHeaders([]string{"X-Requested-With", "Access-Control-Allow-Origin"})
+	originsOk := handlers.AllowedOrigins([]string{"*"})
+	methodsOk := handlers.AllowedMethods([]string{"GET", "HEAD", "POST", "PUT", "OPTIONS"})
+	log.Fatal(http.ListenAndServe(":"+config.Port, handlers.CORS(originsOk, headersOk, methodsOk)(router)))
+}
+
+func webserver() {
+	log.Println("webserver in port " + config.WebServerPort)
+	http.Handle("/", http.FileServer(http.Dir("./webapp")))
+	http.ListenAndServe(":"+config.WebServerPort, nil)
+}

@@ -0,0 +1,54 @@
+package ownrsa
+
+import "math/rand"
+
+func randInt(min int, max int) int {
+	r := rand.Intn(max-min) + min
+	return r
+}
+func randPrime(min int, max int) int {
+	primes := sieveOfEratosthenes(max)
+
+	randN := rand.Intn(len(primes)-0) + 0
+
+	return primes[randN]
+
+}
+
+// return list of primes less than N
+func sieveOfEratosthenes(N int) (primes []int) {
+	b := make([]bool, N)
+	for i := 2; i < N; i++ {
+		if b[i] == true {
+			continue
+		}
+		primes = append(primes, i)
+		for k := i * i; k < N; k += i {
+			b[k] = true
+		}
+	}
+	return
+}
+
+func gcd(a, b int) int {
+	var bgcd func(a, b, res int) int
+
+	bgcd = func(a, b, res int) int {
+		switch {
+		case a == b:
+			return res * a
+		case a%2 == 0 && b%2 == 0:
+			return bgcd(a/2, b/2, 2*res)
+		case a%2 == 0:
+			return bgcd(a/2, b, res)
+		case b%2 == 0:
+			return bgcd(a, b/2, res)
+		case a > b:
+			return bgcd(a-b, b, res)
+		default:
+			return bgcd(a, b-a, res)
+		}
+	}
+
+	return bgcd(a, b, 1)
+}

@@ -0,0 +1,183 @@
+package ownrsa
+
+import (
+	"errors"
+	"fmt"
+	"math/big"
+	"math/rand"
+	"time"
+)
+
+type RSAPublicKey struct {
+	E *big.Int `json:"e"`
+	N *big.Int `json:"n"`
+}
+type RSAPublicKeyString struct {
+	E string `json:"e"`
+	N string `json:"n"`
+}
+type RSAPrivateKey struct {
+	D *big.Int `json:"d"`
+	N *big.Int `json:"n"`
+}
+
+type RSA struct {
+	PubK  RSAPublicKey
+	PrivK RSAPrivateKey
+}
+
+const maxPrime = 500
+const minPrime = 100
+
+func GenerateKeyPair() RSA {
+
+	rand.Seed(time.Now().Unix())
+	p := randPrime(minPrime, maxPrime)
+	q := randPrime(minPrime, maxPrime)
+	fmt.Print("p:")
+	fmt.Println(p)
+	fmt.Print("q:")
+	fmt.Println(q)
+
+	n := p * q
+	phi := (p - 1) * (q - 1)
+	e := 65537
+	var pubK RSAPublicKey
+	pubK.E = big.NewInt(int64(e))
+	pubK.N = big.NewInt(int64(n))
+
+	d := new(big.Int).ModInverse(big.NewInt(int64(e)), big.NewInt(int64(phi)))
+
+	var privK RSAPrivateKey
+	privK.D = d
+	privK.N = big.NewInt(int64(n))
+
+	var rsa RSA
+	rsa.PubK = pubK
+	rsa.PrivK = privK
+	return rsa
+}
+func Encrypt(m string, pubK RSAPublicKey) []int {
+	var c []int
+	mBytes := []byte(m)
+	for _, byte := range mBytes {
+		c = append(c, EncryptInt(int(byte), pubK))
+	}
+	return c
+}
+func Decrypt(c []int, privK RSAPrivateKey) string {
+	var m string
+	var mBytes []byte
+	for _, indC := range c {
+		mBytes = append(mBytes, byte(DecryptInt(indC, privK)))
+	}
+	m = string(mBytes)
+	return m
+}
+
+func EncryptBigInt(bigint *big.Int, pubK RSAPublicKey) *big.Int {
+	Me := new(big.Int).Exp(bigint, pubK.E, nil)
+	c := new(big.Int).Mod(Me, pubK.N)
+	return c
+}
+func DecryptBigInt(bigint *big.Int, privK RSAPrivateKey) *big.Int {
+	Cd := new(big.Int).Exp(bigint, privK.D, nil)
+	m := new(big.Int).Mod(Cd, privK.N)
+	return m
+}
+
+func EncryptInt(char int, pubK RSAPublicKey) int {
+	charBig := big.NewInt(int64(char))
+	Me := charBig.Exp(charBig, pubK.E, nil)
+	c := Me.Mod(Me, pubK.N)
+	return int(c.Int64())
+}
+func DecryptInt(val int, privK RSAPrivateKey) int {
+	valBig := big.NewInt(int64(val))
+	Cd := valBig.Exp(valBig, privK.D, nil)
+	m := Cd.Mod(Cd, privK.N)
+	return int(m.Int64())
+}
+
+func Blind(m []int, r int, pubK RSAPublicKey, privK RSAPrivateKey) []int {
+	var mBlinded []int
+	rBigInt := big.NewInt(int64(r))
+	for i := 0; i < len(m); i++ {
+		mBigInt := big.NewInt(int64(m[i]))
+		rE := new(big.Int).Exp(rBigInt, pubK.E, nil)
+		mrE := new(big.Int).Mul(mBigInt, rE)
+		mrEmodN := new(big.Int).Mod(mrE, privK.N)
+		mBlinded = append(mBlinded, int(mrEmodN.Int64()))
+	}
+	return mBlinded
+}
+
+func BlindSign(m []int, pubK RSAPublicKey, privK RSAPrivateKey) []int {
+	var r []int
+	for i := 0; i < len(m); i++ {
+		mBigInt := big.NewInt(int64(m[i]))
+		sigma := new(big.Int).Exp(mBigInt, privK.D, pubK.N)
+		r = append(r, int(sigma.Int64()))
+	}
+	return r
+}
+func Unblind(blindsigned []int, r int, pubK RSAPublicKey) []int {
+	var mSigned []int
+	rBigInt := big.NewInt(int64(r))
+	for i := 0; i < len(blindsigned); i++ {
+		bsBigInt := big.NewInt(int64(blindsigned[i]))
+		//r1 := new(big.Int).Exp(rBigInt, big.NewInt(int64(-1)), nil)
+		r1 := new(big.Int).ModInverse(rBigInt, pubK.N)
+		bsr := new(big.Int).Mul(bsBigInt, r1)
+		sig := new(big.Int).Mod(bsr, pubK.N)
+		mSigned = append(mSigned, int(sig.Int64()))
+	}
+	return mSigned
+}
+func Verify(msg []int, mSigned []int, pubK RSAPublicKey) bool {
+	if len(msg) != len(mSigned) {
+		return false
+	}
+	var mSignedDecrypted []int
+	for _, ms := range mSigned {
+		msBig := big.NewInt(int64(ms))
+		//decrypt the mSigned with pubK
+		Cd := new(big.Int).Exp(msBig, pubK.E, nil)
+		m := new(big.Int).Mod(Cd, pubK.N)
+		mSignedDecrypted = append(mSignedDecrypted, int(m.Int64()))
+	}
+	fmt.Print("msg signed decrypted: ")
+	fmt.Println(mSignedDecrypted)
+	r := true
+	//check if the mSignedDecrypted == msg
+	for i := 0; i < len(msg); i++ {
+		if msg[i] != mSignedDecrypted[i] {
+			r = false
+		}
+	}
+	return r
+}
+
+func HomomorphicMultiplication(c1 int, c2 int, pubK RSAPublicKey) int {
+	c1BigInt := big.NewInt(int64(c1))
+	c2BigInt := big.NewInt(int64(c2))
+	c1c2 := new(big.Int).Mul(c1BigInt, c2BigInt)
+	n2 := new(big.Int).Mul(pubK.N, pubK.N)
+	d := new(big.Int).Mod(c1c2, n2)
+	r := int(d.Int64())
+	return r
+}
+
+func PubKStringToBigInt(kS RSAPublicKeyString) (RSAPublicKey, error) {
+	var k RSAPublicKey
+	var ok bool
+	k.E, ok = new(big.Int).SetString(kS.E, 10)
+	if !ok {
+		return k, errors.New("error parsing big int E")
+	}
+	k.N, ok = new(big.Int).SetString(kS.N, 10)
+	if !ok {
+		return k, errors.New("error parsing big int N")
+	}
+	return k, nil
+}

@@ -0,0 +1,27 @@
+package main
+
+import (
+	"encoding/json"
+	"io/ioutil"
+)
+
+//Config reads the config
+type Config struct {
+	IP            string      `json:"ip"`
+	Port          string      `json:"port"`
+	WebServerPort string      `json:"webserverport"`
+	Mongodb       MongoConfig `json:"mongodb"`
+}
+type MongoConfig struct {
+	IP       string `json:"ip"`
+	Database string `json:"database"`
+}
+
+var config Config
+
+func readConfig(path string) {
+	file, err := ioutil.ReadFile(path)
+	check(err)
+	content := string(file)
+	json.Unmarshal([]byte(content), &config)
+}

@@ -0,0 +1,47 @@
+package main
+
+import (
+	"log"
+	"net/http"
+	"time"
+
+	"github.com/gorilla/mux"
+)
+
+type Route struct {
+	Name        string
+	Method      string
+	Pattern     string
+	HandlerFunc http.HandlerFunc
+}
+
+func Logger(inner http.Handler, name string) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		start := time.Now()
+
+		inner.ServeHTTP(w, r)
+
+		log.Printf(
+			"%s\t%s\t%s\t%s",
+			r.Method,
+			r.RequestURI,
+			name,
+			time.Since(start),
+		)
+	})
+}
+func NewRouter() *mux.Router {
+	router := mux.NewRouter().StrictSlash(true)
+	for _, route := range routes {
+		var handler http.Handler
+		handler = route.HandlerFunc
+		handler = Logger(handler, route.Name)
+
+		router.
+			Methods(route.Method).
+			Path(route.Pattern).
+			Name(route.Name).
+			Handler(handler)
+	}
+	return router
+}

@@ -0,0 +1,36 @@
+package main
+
+type Routes []Route
+
+var routes = Routes{
+	Route{
+		"Index",
+		"GET",
+		"/",
+		Index,
+	},
+	Route{
+		"Signup",
+		"POST",
+		"/signup",
+		Signup,
+	},
+	Route{
+		"Login",
+		"POST",
+		"/login",
+		Login,
+	},
+	Route{
+		"BlindSign",
+		"POST",
+		"/blindsign",
+		BlindSign,
+	},
+	Route{
+		"VerifySign",
+		"POST",
+		"/verifysign",
+		VerifySign,
+	},
+}

@@ -0,0 +1,20 @@
+echo ""
+echo "sending the signup, response:"
+curl -X POST http://127.0.0.1:3130/signup -d '{"email": "user1@e.com", "password": "user1"}'
+
+echo ""
+echo "sending the login, response:"
+curl -X POST http://127.0.0.1:3130/login -d '{"email": "user1@e.com", "password": "user1"}'
+
+
+echo ""
+echo "send pubK and m to blind sign"
+echo "json to send to the serverIDsigner:"
+echo '{"pubKstring": {"e": "65537", "n": "139093"}, "m": "hola"}'
+echo "serverIDsigner response:"
+BLINDSIGNED=$(curl -X POST http://127.0.0.1:3130/blindsign -d '{"pubKstring": {"e": "65537", "n": "139093"}, "m": "hola"}')
+echo "$BLINDSIGNED"
+
+echo ""
+echo "send blindsigned to the serverIDsigner to verify"
+curl -X POST http://127.0.0.1:3130/verifysign -d '{"m": "hola", "mSigned": "131898 40373 107552 34687"}'

@@ -0,0 +1,170 @@
+package main
+
+import (
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"strconv"
+	"strings"
+
+	"gopkg.in/mgo.v2/bson"
+
+	ownrsa "./ownrsa"
+)
+
+type User struct {
+	Id       bson.ObjectId `json:"id" bson:"_id,omitempty"`
+	Email    string        `json:"email"`
+	Password string        `json:"password"`
+	Token    string        `json:"token"`
+}
+
+func Index(w http.ResponseWriter, r *http.Request) {
+	//TODO return the public key, to allow others verifign signed strings by this server
+	fmt.Fprintln(w, "serverIDsigner")
+}
+
+func Signup(w http.ResponseWriter, r *http.Request) {
+
+	decoder := json.NewDecoder(r.Body)
+	var user User
+	err := decoder.Decode(&user)
+	if err != nil {
+		panic(err)
+	}
+	defer r.Body.Close()
+
+	fmt.Print("user signup: ")
+	fmt.Println(user)
+
+	//save the new project to mongodb
+	rUser := User{}
+	err = userCollection.Find(bson.M{"email": user.Email}).One(&rUser)
+	if err != nil {
+		//user not exists
+		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
+		err = userCollection.Find(bson.M{"email": user.Email}).One(&user)
+	} else {
+		//user exists
+		fmt.Fprintln(w, "User already registered")
+		return
+	}
+
+	jResp, err := json.Marshal(user)
+	if err != nil {
+		panic(err)
+	}
+	fmt.Fprintln(w, string(jResp))
+}
+
+func Login(w http.ResponseWriter, r *http.Request) {
+
+	decoder := json.NewDecoder(r.Body)
+	var user User
+	err := decoder.Decode(&user)
+	if err != nil {
+		panic(err)
+	}
+	defer r.Body.Close()
+
+	fmt.Print("user login: ")
+	fmt.Println(user)
+	token, err := newToken()
+	check(err)
+	user.Token = token
+
+	//save the new project to mongodb
+	rUser := User{}
+	err = userCollection.Find(bson.M{"email": user.Email}).One(&rUser)
+	if err != nil {
+	} else {
+		//user exists, update with the token
+		err = userCollection.Update(bson.M{"_id": rUser.Id}, user)
+		check(err)
+	}
+
+	jResp, err := json.Marshal(user)
+	if err != nil {
+		panic(err)
+	}
+	fmt.Fprintln(w, string(jResp))
+}
+
+type Sign struct {
+	M string `json:"m"`
+	C string `json:"c"`
+}
+
+type AskBlindSign struct {
+	PubKString ownrsa.RSAPublicKeyString `json:"pubKstring"`
+	PubK       ownrsa.RSAPublicKey       `json:"pubK"`
+	M          string                    `json:"m"`
+}
+
+func BlindSign(w http.ResponseWriter, r *http.Request) {
+	fmt.Println(r.Body)
+	decoder := json.NewDecoder(r.Body)
+	var askBlindSign AskBlindSign
+	err := decoder.Decode(&askBlindSign)
+	if err != nil {
+		panic(err)
+	}
+	defer r.Body.Close()
+
+	fmt.Println(askBlindSign)
+	askBlindSign.PubK, err = ownrsa.PubKStringToBigInt(askBlindSign.PubKString)
+	if err != nil {
+		fmt.Fprintln(w, "error")
+		return
+	}
+
+	//convert msg to []int
+	var m []int
+	mBytes := []byte(askBlindSign.M)
+	for _, byte := range mBytes {
+		m = append(m, int(byte))
+	}
+
+	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
+	fmt.Print("Sigma': ")
+	fmt.Println(sigma)
+
+	fmt.Fprintln(w, sigma)
+}
+
+type PetitionVerifySign struct {
+	M       string `json:"m"`
+	MSigned string `json:"mSigned"`
+}
+
+func VerifySign(w http.ResponseWriter, r *http.Request) {
+	decoder := json.NewDecoder(r.Body)
+	var petitionVerifySign PetitionVerifySign
+	err := decoder.Decode(&petitionVerifySign)
+	if err != nil {
+		panic(err)
+	}
+	defer r.Body.Close()
+
+	fmt.Println(petitionVerifySign)
+
+	//convert M to []int
+	var mOriginal []int
+	mBytes := []byte(petitionVerifySign.M)
+	for _, byte := range mBytes {
+		mOriginal = append(mOriginal, int(byte))
+	}
+
+	//convert MSigned to []int
+	var mSignedInts []int
+	mSignedString := strings.Split(petitionVerifySign.MSigned, " ")
+	for _, s := range mSignedString {
+		i, err := strconv.Atoi(s)
+		check(err)
+		mSignedInts = append(mSignedInts, i)
+	}
+
+	verified := ownrsa.Verify(mOriginal, mSignedInts, serverRsa.PubK)
+
+	fmt.Fprintln(w, verified)
+}