func CreateACMessageNACL(context *ackp.SecKey, rnd, msg, myNick []byte) (out []byte, err error) {
//var noncebyte [24]byte
/* lets build our header */
myHdr, intHdr, err := BuildHeader([]byte(msgHdrAC))
if err != nil {
return nil, &acutl.AcError{Value: -1, Msg: "CreateACMessageNACL().BuildHeader(): ", Err: err}
}
// first let's compress
myBody, err := acutl.CompressData(msg)
if err != nil {
return nil, &acutl.AcError{Value: -2, Msg: "CreateACMessageNACL().CompressData(): ", Err: err}
}
//BuildNonceAC(inonce uint32, bob, mynick, myhdr []byte) (nonce []byte, noncebyte *[24]byte, err error)
_, noncebyte, err := BuildNonceAC(context.GetNonce(), context.GetBob(), myNick, myHdr)
// OPEN the key
// XXX new to check rnd and context.key are the same size
/*
for j := 0; j < len(rnd); j++ {
context.key[j] = context.key[j] ^ rnd[j]
}
*/
context.RndKey(rnd)
// encrypt
myCipher := secretbox.Seal(nil, myBody, noncebyte, context.GetSealKey())
// close the key
context.RndKey(rnd)
/*
for j := 0; j < len(rnd); j++ {
context.key[j] = context.key[j] ^ rnd[j]
}
*/
// XXX error checking
out, err = packMessageAC(&intHdr, context.GetNonce(), &myCipher)
//fmt.Fprintf(os.Stderr, "NACL PB == AC MSG OUT[%d]: %s\n", len(out), out)
//context.nonce++
context.IncNonce(0)
return out, nil
}
func OpenACMessageNACL(context *ackp.SecKey, rnd, cmsg, peerNick, myNick []byte) (out []byte, err error) {
fmt.Fprintf(os.Stderr, "OpenACMessageNACL()\n")
b64, err := acutl.B64DecodeData(cmsg)
if err != nil {
return nil, &acutl.AcError{Value: -1, Msg: "OpenACMessageNACL(): ", Err: err}
}
cnonce, myHdr, ciphertext, err := unpackMessageAC(b64)
if err != nil {
return nil, &acutl.AcError{Value: -2, Msg: "OpenACMessageNACL(): ", Err: err}
}
// XXX this is to handle private message instead of channel communication
// as the destination are assymetrical eau's dst is frl and frl's dst is eau
//
ac_bob := context.GetBob()
ok_bob, _ := IsValidChannelName(ac_bob)
fmt.Fprintf(os.Stderr, "[+] OpenACMessage: is %s a valid channel: %t\n", ac_bob, ok_bob)
if ok_bob == false && len(myNick) > 0 {
ac_bob = myNick
}
/* let's build the nonce */
//BuildNonceAC(inonce uint32, bob, mynick, myhdr []byte) (nonce []byte, noncebyte *[24]byte, err error)
_, noncebyte, err := BuildNonceAC(cnonce, ac_bob, peerNick, myHdr)
// OPEN the key
context.RndKey(rnd)
// XXX new to check rnd and context.key are the same size
/*
for j := 0; j < len(rnd); j++ {
context.key[j] = context.key[j] ^ rnd[j]
}
*/
packed, ok := secretbox.Open(nil, ciphertext, noncebyte, context.GetSealKey())
// Close the key
context.RndKey(rnd)
/*
for j := 0; j < len(rnd); j++ {
context.key[j] = context.key[j] ^ rnd[j]
}
*/
if ok == false {
//return nil, acprotoError(1, "OpenACMessage().SecretOpen(): false ", nil)
return nil, &acutl.AcError{Value: -3, Msg: "OpenACMessageNACL().SecretOpen(): ", Err: nil}
}
out, err = acutl.DecompressData(packed)
if err != nil {
return nil, &acutl.AcError{Value: -3, Msg: "OpenACMessageNACL().DecompressData(): ", Err: err}
}
//nonceval = acIn.GetNonce()
// update the nonce value
/*
if cnonce > context.nonce {
context.nonce = cnonce + 1
} else {
context.nonce++
}
*/
context.IncNonce(cnonce)
return out, nil
//return nil, nil
}