added 6h+6h random time delta at su3-age to increase anonymity

history.txt

@@ -1,6 +1,12 @@
+2016-10-09
+ * seed the math random generator with time.Now().UnixNano()
+ * added 6h+6h random time delta at su3-age to increase anonymity
+ * app.Version = "0.1.5"
+
+
 2016-05-15
  * README.md updated
- * allowed routerInfos age increased from 96 to 192
+ * allowed routerInfos age increased from 96 to 192 hours
  * app.Version = "0.1.4"
 
 2016-03-05

main.go

@@ -14,7 +14,7 @@ func main() {
 
 	app := cli.NewApp()
 	app.Name = "i2p-tools"
-	app.Version = "0.1.4"
+	app.Version = "0.1.5"
 	app.Usage = "I2P tools and reseed server"
 	app.Author = "martin61"
 	app.Email = "noemail"

reseed/service.go

@@ -265,9 +265,15 @@ func (db *LocalNetDbImpl) RouterInfos() (routerInfos []routerInfo, err error) {
 			continue
 		}
 
+		// added 6h+6h random time delta to increase Anonymity
+		rr := rand.New(rand.NewSource(time.Now().UnixNano()))
+		now := file.ModTime()
+		then := now.Add(-1 * time.Duration(rr.Intn(60*60*6) + 60*60*6) * time.Second)
+
 		routerInfos = append(routerInfos, routerInfo{
 			Name:    file.Name(),
-			ModTime: file.ModTime(),
+			//ModTime: file.ModTime(),
+			ModTime: then,
 			Data:    riBytes,
 		})
 	}

su3/su3.go

@@ -3,7 +3,8 @@ package su3
 import (
 	"bytes"
 	"crypto"
-	"crypto/rand"
+	crypto_rand "crypto/rand"
+	math_rand "math/rand"
 	"crypto/rsa"
 	"crypto/x509"
 	"encoding/binary"
@@ -53,8 +54,13 @@ type Su3File struct {
 }
 
 func NewSu3File() *Su3File {
+
+	// added 6h random time delta to increase Anonymity
+	rr := math_rand.New(math_rand.NewSource(time.Now().UnixNano()))
+	now := time.Now().Unix() - rr.Int63n(60*60*6)
+
 	return &Su3File{
-		Version:       []byte(strconv.FormatInt(time.Now().Unix(), 10)),
+		Version:       []byte(strconv.FormatInt(now, 10)),
 		SignatureType: SIGTYPE_RSA_SHA512,
 	}
 }
@@ -78,7 +84,7 @@ func (s *Su3File) Sign(privkey *rsa.PrivateKey) error {
 	h.Write(s.BodyBytes())
 	digest := h.Sum(nil)
 
-	sig, err := rsa.SignPKCS1v15(rand.Reader, privkey, 0, digest)
+	sig, err := rsa.SignPKCS1v15(crypto_rand.Reader, privkey, 0, digest)
 	if nil != err {
 		return err
 	}