Make SliceZero function public

[govpn.git] / src / govpn / handshake.go

diff --git a/src/govpn/handshake.go b/src/govpn/handshake.go
index 606e7d0c4bda7ade1f9db1c7f00200090468ca00..13f1a6cdace24d268f63d08ac6fc91039b7372b7 100644 (file)
--- a/src/govpn/handshake.go
+++ b/src/govpn/handshake.go
@@ -19,7 +19,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 package govpn
 
 import (
-       "crypto/rand"
        "crypto/subtle"
        "encoding/binary"
        "io"
@@ -70,28 +69,28 @@ func HApply(data *[32]byte) {
 // Zero handshake's memory state
 func (h *Handshake) Zero() {
        if h.rNonce != nil {
-               sliceZero(h.rNonce[:])
+               SliceZero(h.rNonce[:])
        }
        if h.dhPriv != nil {
-               sliceZero(h.dhPriv[:])
+               SliceZero(h.dhPriv[:])
        }
        if h.key != nil {
-               sliceZero(h.key[:])
+               SliceZero(h.key[:])
        }
        if h.dsaPubH != nil {
-               sliceZero(h.dsaPubH[:])
+               SliceZero(h.dsaPubH[:])
        }
        if h.rServer != nil {
-               sliceZero(h.rServer[:])
+               SliceZero(h.rServer[:])
        }
        if h.rClient != nil {
-               sliceZero(h.rClient[:])
+               SliceZero(h.rClient[:])
        }
        if h.sServer != nil {
-               sliceZero(h.sServer[:])
+               SliceZero(h.sServer[:])
        }
        if h.sClient != nil {
-               sliceZero(h.sClient[:])
+               SliceZero(h.sClient[:])
        }
 }
 
@@ -102,23 +101,13 @@ func (h *Handshake) rNonceNext(count uint64) []byte {
        return nonce
 }
 
-func randRead(b []byte) error {
-       var err error
-       if egdPath == "" {
-               _, err = rand.Read(b)
-       } else {
-               err = EGDRead(b)
-       }
-       return err
-}
-
 func dhKeypairGen() (*[32]byte, *[32]byte) {
        priv := new([32]byte)
        pub := new([32]byte)
        repr := new([32]byte)
        reprFound := false
        for !reprFound {
-               if err := randRead(priv[:]); err != nil {
+               if _, err := Rand.Read(priv[:]); err != nil {
                        log.Fatalln("Error reading random for DH private key:", err)
                }
                reprFound = extra25519.ScalarBaseMult(pub, repr, priv)
@@ -167,7 +156,7 @@ func HandshakeStart(addr string, conn io.Writer, conf *PeerConf) *Handshake {
        state.dhPriv, dhPubRepr = dhKeypairGen()
 
        state.rNonce = new([RSize]byte)
-       if err := randRead(state.rNonce[:]); err != nil {
+       if _, err := Rand.Read(state.rNonce[:]); err != nil {
                log.Fatalln("Error reading random for nonce:", err)
        }
        var enc []byte
@@ -216,11 +205,12 @@ func (h *Handshake) Server(data []byte) *Peer {
 
                // Generate R* and encrypt them
                h.rServer = new([RSize]byte)
-               if err := randRead(h.rServer[:]); err != nil {
+               var err error
+               if _, err = Rand.Read(h.rServer[:]); err != nil {
                        log.Fatalln("Error reading random for R:", err)
                }
                h.sServer = new([SSize]byte)
-               if err := randRead(h.sServer[:]); err != nil {
+               if _, err = Rand.Read(h.sServer[:]); err != nil {
                        log.Fatalln("Error reading random for S:", err)
                }
                var encRs []byte
@@ -308,11 +298,12 @@ func (h *Handshake) Client(data []byte) *Peer {
 
                // Generate R* and signature and encrypt them
                h.rClient = new([RSize]byte)
-               if err := randRead(h.rClient[:]); err != nil {
+               var err error
+               if _, err = Rand.Read(h.rClient[:]); err != nil {
                        log.Fatalln("Error reading random for R:", err)
                }
                h.sClient = new([SSize]byte)
-               if err := randRead(h.sClient[:]); err != nil {
+               if _, err = Rand.Read(h.sClient[:]); err != nil {
                        log.Fatalln("Error reading random for S:", err)
                }
                sign := ed25519.Sign(h.Conf.DSAPriv, h.key[:])