updated ethereum smart contract. Implemented backend of the login library example

clientApp/GUI/views/id/id.html

@@ -21,29 +21,30 @@
                             placeholder="Enter here the proof-of-decrypt..."
                         ></textarea>
                     </div>
+                    <h5 ng-show="decryptData.m">PoD:</h5>
                     {{decryptData.m}}
                     <div ng-click="decrypt()" ng-show="id.blockchainref" class="btn btn-raised pull-right c_o_pink300">
                         Proof of decrypt
                     </div>
 
-                </div>
-            </div>
-            <br><br><br><br><br>
-            <hr>
-            <div class="row">
-                <h5>Testing only:</h5>
-                <div class="row">
-                    <textarea style="color:#000000;width:100%;" rows="4"
-                        ng-model="encryptData.m"
-                        placeholder="Enter here the unencrypted..."
-                    ></textarea>
-                </div>
-                <textarea style="backgroud:grey;color:#000000;width:100%;" rows="4"
-                    ng-model="encryptData.c"
-                    placeholder="Encrypted data..."
-                ></textarea>
-                <div ng-click="encrypt()" ng-show="id.blockchainref" class="btn btn-raised pull-right c_o_orange300">
-                    Encrypt
+                    <br><br><br><br><br>
+                    <hr>
+                    <h5>Testing only:</h5>
+                    <div class="row">
+                        <textarea style="color:#000000;width:100%;" rows="4"
+                            ng-model="encryptData.m"
+                            placeholder="Enter here the unencrypted..."
+                        ></textarea>
+                    </div>
+                    <div class="row">
+                        <textarea style="backgroud:grey;color:#000000;width:100%;" rows="4"
+                            ng-model="encryptData.c"
+                            placeholder="Encrypted data..."
+                        ></textarea>
+                    </div>
+                    <div ng-click="encrypt()" ng-show="id.blockchainref" class="btn btn-raised pull-right c_o_orange300">
+                        Encrypt
+                    </div>
                 </div>
             </div>
         </div>

clientApp/GUI/views/login/login.js

@@ -49,7 +49,7 @@ angular.module('app.login', ['ngRoute'])
                             window.location.reload();
                         } else {
                             console.log("login failed");
-                            toastr.error('Login failed');
+                            toastr.error('Login failed, ' + data.data);
                         }
 
 

clientApp/GUI/views/signup/signup.js

@@ -9,11 +9,27 @@ angular.module('app.signup', ['ngRoute'])
   });
 }])
 
-.controller('SignupCtrl', function($scope, $http, $routeParams) {
+.controller('SignupCtrl', function($scope, $http, $routeParams, $rootScope) {
     $scope.user = {};
-    $scope.doSignup = function() {
+    $scope.signup = function() {
       console.log('Doing signup', $scope.user);
+      $http({
+              url: $rootScope.server + 'signup',
+              method: "POST",
+              headers: {
+                  "Content-Type": undefined
+              },
+              data: $scope.user
+          })
+          .then(function(data) {
+                  console.log("data: ");
+                  console.log(data.data);
+                  window.location="/";
 
+              },
+              function(data) {
+                  console.log(data);
+              });
 
     };
 });

clientApp/main.go

@@ -38,5 +38,8 @@ func main() {
 }
 
 func GUI() {
-	//here, run electron app
+	//here, run webserver
+	log.Println("webserver in port " + "8080")
+	http.Handle("/", http.FileServer(http.Dir("./web")))
+	http.ListenAndServe(":"+"8080", nil)
 }

darkID-library-login-example/.gitignore

@@ -0,0 +1,3 @@
+keys.json
+keys
+web

darkID-library-login-example/README.md

@@ -0,0 +1 @@
+# darkID-login-library-example

darkID-library-login-example/RESTfunctions.go

@@ -0,0 +1,75 @@
+package main
+
+import (
+	"encoding/json"
+	"fmt"
+	"net/http"
+
+	"github.com/cryptoballot/rsablind"
+	"github.com/fatih/color"
+
+	"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 Index(w http.ResponseWriter, r *http.Request) {
+	fmt.Fprintln(w, "clientApp")
+}
+
+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)
+
+	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 key Key
+	err := decoder.Decode(&key)
+	if err != nil {
+		panic(err)
+	}
+	defer r.Body.Close()
+	//TODO check if the user password exists in the database
+
+	fmt.Print("key login: ")
+	fmt.Println(key)
+	token, err := newToken()
+	check(err)
+
+	//validate if the pubK darkID is in the blockchain
+
+	//verify that the darkID is signed
+	if err := rsablind.VerifyBlindSignature(key.ServerVerifier, key.Hashed, key.UnblindedSig); err != nil {
+		fmt.Println(err)
+	} else {
+		color.Green("blind signature verified")
+	}
+
+	/*jResp, err := json.Marshal(token)
+	if err != nil {
+		panic(err)
+	}*/
+	fmt.Fprintln(w, string(token))
+}

darkID-library-login-example/config.json

@@ -0,0 +1,3 @@
+{
+    "port": "5000"
+}

darkID-library-login-example/errors.go

@@ -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)
+	}
+}

darkID-library-login-example/hash.go

@@ -0,0 +1,12 @@
+package main
+
+import (
+	"crypto/sha256"
+	"encoding/base64"
+)
+
+func hash(s string) string {
+	h := sha256.New()
+	h.Write([]byte(s))
+	return base64.URLEncoding.EncodeToString(h.Sum(nil))
+}

darkID-library-login-example/keys.go

@@ -0,0 +1,183 @@
+package main
+
+import (
+	"crypto/rsa"
+	"crypto/x509"
+	"encoding/asn1"
+	"encoding/json"
+	"encoding/pem"
+	"errors"
+	"fmt"
+	"io/ioutil"
+	"os"
+	"time"
+
+	"github.com/fatih/color"
+)
+
+type Key struct {
+	ID             string         `json:"id"`
+	PrivK          string         `json:"privK"` //path of the PrivK file
+	PubK           string         `json:"pubK"`  //path of the PubK file
+	Date           time.Time      `json:"date"`
+	Hashed         []byte         `json:"hashed"`
+	UnblindedSig   []byte         `json:"unblindedsig"`
+	Verified       bool           `json:"verified"`
+	ServerVerifier *rsa.PublicKey `json:"serververifier"`
+	SignerID       string         `json:"signerid"`
+	BlockchainRef  string         `json:"blockchainref"`
+}
+
+func ExportRsaPrivateKeyAsPemStr(privkey *rsa.PrivateKey) string {
+	privkey_bytes := x509.MarshalPKCS1PrivateKey(privkey)
+	privkey_pem := pem.EncodeToMemory(
+		&pem.Block{
+			Type:  "RSA PRIVATE KEY",
+			Bytes: privkey_bytes,
+		},
+	)
+	return string(privkey_pem)
+}
+
+func ParseRsaPrivateKeyFromPemStr(privPEM string) (*rsa.PrivateKey, error) {
+	block, _ := pem.Decode([]byte(privPEM))
+	if block == nil {
+		return nil, errors.New("failed to parse PEM block containing the key")
+	}
+	priv, err := x509.ParsePKCS1PrivateKey(block.Bytes)
+	if err != nil {
+		return nil, err
+	}
+	return priv, nil
+}
+
+func ExportRsaPublicKeyAsPemStr(pubkey rsa.PublicKey) (string, error) {
+	asn1Bytes, err := asn1.Marshal(pubkey)
+	check(err)
+	pubkey_pem := pem.EncodeToMemory(
+		&pem.Block{
+			Type:  "PUBLIC KEY",
+			Bytes: asn1Bytes,
+		},
+	)
+	color.Red("pubkey_pem")
+	fmt.Println(pubkey_pem)
+	return string(pubkey_pem), nil
+}
+
+func ParseRsaPublicKeyFromPemStr(pubPEM string) (pub rsa.PublicKey, err error) {
+	pemBlock, _ := pem.Decode([]byte(pubPEM))
+	_, err = asn1.Unmarshal(pemBlock.Bytes, &pub)
+	return
+}
+
+func savePEMKey(fileName string, key *rsa.PrivateKey) {
+	outFile, err := os.Create(fileName)
+	check(err)
+	defer outFile.Close()
+
+	var privateKey = &pem.Block{
+		Type:  "PRIVATE KEY",
+		Bytes: x509.MarshalPKCS1PrivateKey(key),
+	}
+
+	err = pem.Encode(outFile, privateKey)
+	check(err)
+}
+func savePublicPEMKey(fileName string, pubkey rsa.PublicKey) {
+	asn1Bytes, err := asn1.Marshal(pubkey)
+	check(err)
+
+	var pemkey = &pem.Block{
+		Type:  "PUBLIC KEY",
+		Bytes: asn1Bytes,
+	}
+
+	pemfile, err := os.Create(fileName)
+	check(err)
+	defer pemfile.Close()
+
+	err = pem.Encode(pemfile, pemkey)
+	check(err)
+}
+func openPEMKey(path string) (key *rsa.PrivateKey, err error) {
+	b, err := ioutil.ReadFile(path)
+	if err != nil {
+		fmt.Print(err)
+	}
+	key, err = ParseRsaPrivateKeyFromPemStr(string(b))
+	return
+}
+func openPublicPEMKey(path string) (key rsa.PublicKey, err error) {
+	b, err := ioutil.ReadFile(path)
+	if err != nil {
+		fmt.Print(err)
+	}
+	key, err = ParseRsaPublicKeyFromPemStr(string(b))
+	return
+}
+func readKeys() []Key {
+	path := keysDir + "/keys.json"
+	var keys []Key
+
+	file, err := ioutil.ReadFile(path)
+	check(err)
+	content := string(file)
+	json.Unmarshal([]byte(content), &keys)
+
+	return keys
+}
+
+func saveKeys(keys []Key) {
+	jsonKeys, err := json.Marshal(keys)
+	check(err)
+	err = ioutil.WriteFile(keysDir+"/keys.json", jsonKeys, 0644)
+	check(err)
+}
+func saveKey(k Key) {
+	fmt.Println(k)
+	keys := readKeys()
+	for i, key := range keys {
+		if key.ID == k.ID {
+			keys[i] = k
+		}
+	}
+	saveKeys(keys)
+}
+func getKeyByKeyID(keyID string) (k Key) {
+	keys := readKeys()
+	for _, key := range keys {
+		if key.ID == keyID {
+			k = key
+		}
+	}
+	return k
+}
+func removeKey(keyID string, originalKeys []Key) (keys []Key) {
+	for _, key := range originalKeys {
+		if key.ID != keyID {
+			keys = append(keys, key)
+		}
+	}
+	return
+}
+
+/*
+func getServerPubK(url string) ownrsa.RSAPublicKey {
+	r, err := http.Get(url + "/")
+	check(err)
+	fmt.Println(r)
+
+	decoder := json.NewDecoder(r.Body)
+	//var sigmaString string
+	var pubK ownrsa.RSAPublicKey
+	err = decoder.Decode(&pubK)
+	if err != nil {
+		panic(err)
+	}
+	defer r.Body.Close()
+	color.Blue("received server pubK:")
+	fmt.Println(pubK)
+	return pubK
+}
+*/

darkID-library-login-example/log.go

@@ -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)
+}

darkID-library-login-example/main.go

@@ -0,0 +1,46 @@
+package main
+
+import (
+	"fmt"
+	"log"
+	"net/http"
+
+	"github.com/fatih/color"
+	"github.com/gorilla/handlers"
+)
+
+const keysDir = "keys"
+const keysize = 2048
+const hashize = 1536
+
+func main() {
+	color.Blue("Starting darkID-libarary-login-example")
+
+	readConfig("config.json")
+	fmt.Println(config)
+
+	/*//create keys directory
+	_ = os.Mkdir(keysDir, os.ModePerm)*/
+
+	initializeToken()
+
+	//run thw webserver
+	go GUI()
+
+	//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 GUI() {
+	//here, run webserver
+	log.Println("webserver in port " + "8080")
+	http.Handle("/", http.FileServer(http.Dir("./web")))
+	http.ListenAndServe(":"+"8080", nil)
+}

darkID-library-login-example/readConfig.go

@@ -0,0 +1,20 @@
+package main
+
+import (
+	"encoding/json"
+	"io/ioutil"
+)
+
+//Config reads the config
+type Config struct {
+	Port string `json:"port"`
+}
+
+var config Config
+
+func readConfig(path string) {
+	file, err := ioutil.ReadFile(path)
+	check(err)
+	content := string(file)
+	json.Unmarshal([]byte(content), &config)
+}

darkID-library-login-example/restConfig.go

@@ -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
+}

darkID-library-login-example/restRoutes.go

@@ -0,0 +1,24 @@
+package main
+
+type Routes []Route
+
+var routes = Routes{
+	Route{
+		"Index",
+		"GET",
+		"/",
+		Index,
+	},
+	Route{
+		"Signup",
+		"POST",
+		"/signup",
+		Signup,
+	},
+	Route{
+		"Login",
+		"POST",
+		"/login",
+		Login,
+	},
+}

darkID-library-login-example/testUser.sh

@@ -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"}'

darkID-library-login-example/tokens.go

@@ -0,0 +1,49 @@
+package main
+
+import (
+	"fmt"
+	"time"
+
+	jwt "github.com/dgrijalva/jwt-go"
+)
+
+const (
+	signingKey = "this is the secret signing key"
+)
+
+var createdToken string
+
+func initializeToken() {
+	var err error
+	createdToken, err = newToken()
+	if err != nil {
+		fmt.Println("Creating token failed")
+	}
+}
+
+func newToken() (string, error) {
+	signingKeyB := []byte(signingKey)
+	// Create the token
+	token := jwt.New(jwt.SigningMethodHS256)
+	// Set some claims
+	claims := make(jwt.MapClaims)
+	claims["foo"] = "bar"
+	claims["exp"] = time.Now().Add(time.Hour * 72).Unix()
+	token.Claims = claims
+
+	// Sign and get the complete encoded token as a string
+	tokenString, err := token.SignedString(signingKeyB)
+	return tokenString, err
+}
+
+func parseToken(myToken string, myKey string) {
+	token, err := jwt.Parse(myToken, func(token *jwt.Token) (interface{}, error) {
+		return []byte(myKey), nil
+	})
+
+	if err == nil && token.Valid {
+		fmt.Println("Your token is valid.  I like your style.")
+	} else {
+		fmt.Println("This token is terrible!  I cannot accept this.")
+	}
+}

eth/darkID_contract.sol

@@ -13,7 +13,7 @@ contract DarkID {
     }
 
 
-    IdStruct ID;
+    IdStruct public ID;
 
 
     function DarkID(string _pubK, string _hashed, string _unblindedSig, string _serverVerifier, string _signerID) public {

eth/darkID_contract_sol_DarkID.abi

@@ -0,0 +1 @@
+[{"constant":true,"inputs":[],"name":"getDarkID","outputs":[{"name":"","type":"string"},{"name":"","type":"string"},{"name":"","type":"string"},{"name":"","type":"string"},{"name":"","type":"string"},{"name":"","type":"string"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"ID","outputs":[{"name":"pubK","type":"string"},{"name":"date","type":"string"},{"name":"hashed","type":"string"},{"name":"unblindedSig","type":"string"},{"name":"serverVerifier","type":"string"},{"name":"signerID","type":"string"}],"payable":false,"stateMutability":"view","type":"function"},{"inputs":[{"name":"_pubK","type":"string"},{"name":"_hashed","type":"string"},{"name":"_unblindedSig","type":"string"},{"name":"_serverVerifier","type":"string"},{"name":"_signerID","type":"string"}],"payable":false,"stateMutability":"nonpayable","type":"constructor"}]

eth/instructions.md

@@ -0,0 +1,52 @@
+- start node and blockchain syncing in testnet
+```
+geth --testnet --datadir ~/eth-testnet
+```
+
+- create first account (wallet)
+```
+geth --testnet --datadir ~/eth-testnet account new
+```
+
+- mine ethers in testnet
+```
+geth --testnet --datadir ~/eth-testnet --mine
+```
+
+- serve dapp running on localhost:8000 via RPC
+```
+geth --testnet --datadir ~/eth-testnet --rpc --rpccorsdomain "http://localhost:8000" --rpcapi eth,web3,personal
+```
+
+
+- generate ABI from contract.sol
+```
+solcjs --abi HelloWorldContract.sol
+```
+
+- generate the byte code
+```
+solcjs --bin HelloWorldContract.sol
+```
+
+
+- deploy contract via geth js console
+    - open geth console
+    ```
+    geth --testnet --datadir ~/eth-testnet console
+    ```
+
+    - in the console create the contract using ABI and BYTE CODE result from compilation
+    ```js
+    var abi = [{"constant":true,"inputs":[],"name":"name","outputs":[{"name":"","type":"bytes32"}],"payable":false,"type":"function"}];
+    var code = '0x60606040527f48656c6c6f20576f726c64000000000000000000000000000000000000000000600090600019169055341561003957600080fd5b5b609d806100486000396000f30060606040526000357c0100000000000000000000000000000000000000000000000000000000900463ffffffff16806306fdde0314603d575b600080fd5b3415604757600080fd5b604d606b565b60405180826000191660001916815260200191505060405180910390f35b600054815600a165627a7a72305820f4c510e24a238337d5334b5b38a44e88ea53ef40f26aeb96eba4609cb72827cd0029';
+    web3.personal.unlockAccount(eth.accounts[0], 'PASSWORD');
+    var inputdata = ["pub", "h", "u", "sv", "signerid"];
+    var contract = web3.eth.contract(abi).new(inputdata,{ from: eth.accounts[0], data: code, gas: 1000000 });
+    web3.personal.lockAccount(eth.accounts[0]);
+    ```
+
+    - call the method in the contract
+    ```js
+    contract.name()
+    ```

serverIDsigner/RESTfunctions.go

@@ -82,11 +82,21 @@ func Login(w http.ResponseWriter, r *http.Request) {
 	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)
+		jResp, err := json.Marshal("error login, email not found")
 		check(err)
+		fmt.Fprintln(w, string(jResp))
+		return
 	}
+	//user exists, check password
+	if user.Password != rUser.Password {
+		jResp, err := json.Marshal("error login, password not match")
+		check(err)
+		fmt.Fprintln(w, string(jResp))
+		return
+	}
+	//update with the token
+	err = userCollection.Update(bson.M{"_id": rUser.Id}, user)
+	check(err)
 
 	jResp, err := json.Marshal(user)
 	if err != nil {