func OpenACMessageNACL(context *ickp.SecretKey, rnd, cmsg, peerNick, myNick []byte) (out []byte, err error) {
//fmt.Fprintf(os.Stderr, "OpenACMessageNACL()\n")
b64, err := icutl.B64DecodeData(cmsg)
if err != nil {
return nil, &icutl.AcError{Value: -1, Msg: "OpenACMessageNACL(): ", Err: err}
}
cnonce, myHdr, ciphertext, err := unpackMessageAC(b64)
if err != nil {
return nil, &icutl.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, &icutl.AcError{Value: -3, Msg: "OpenACMessageNACL().SecretOpen(): ", Err: nil}
}
out, err = icutl.DecompressData(packed)
if err != nil {
return nil, &icutl.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
}
func CreateACMessageNACL(context *ickp.SecretKey, 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, &icutl.AcError{Value: -1, Msg: "CreateACMessageNACL().BuildHeader(): ", Err: err}
}
// first let's compress
myBody, err := icutl.CompressData(msg)
if err != nil {
return nil, &icutl.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 CreateKXMessageNACL(context *ickp.SecretKey, rnd []byte, peerPubkey, myPrivkey *[32]byte, channel, myNick, peerNick []byte) (out []byte, err error) {
/* lets build our header */
myHdr, intHdr, err := BuildHeader([]byte(msgHdrKX))
if err != nil {
return nil, &icutl.AcError{Value: -1, Msg: "CreateKXMessageNACL().BuildHeader(): ", Err: err}
}
// Open the key
context.RndKey(rnd)
//fmt.Fprintf(os.Stderr, "CREATE KX KEY: %s\n", hex.EncodeToString(context.key[:]))
// first let's compress
myBody, err := icutl.CompressData(context.GetKey())
if err != nil {
return nil, &icutl.AcError{Value: -2, Msg: "CreateKXMessageNACL().CompressData(): ", Err: err}
}
// Close the key
context.RndKey(rnd)
//fmt.Fprintf(os.Stderr, "channel: %s context.bob: %s\n", channel, context.bob)
kx_channel := IsChannelOrPriv(channel, myNick, peerNick)
// XXX i can probably use context.bob instead of a specific channel specification...
//BuildNonceAC(inonce uint32, bob, mynick, myhdr []byte) (nonce []byte, noncebyte *[24]byte, err error)
_, noncebyte, err := BuildNonceKX(context.GetNonce(), kx_channel, myNick, peerNick, myHdr)
//fmt.Fprintf(os.Stderr, "peerpk : %p myprivkey: %p\n", peerPubkey, myPrivkey)
// XXX TODO: need serious cleanup and error checking!!
//fmt.Fprintf(os.Stderr, "body.Bytes(): %p, noncebyte: %p, peerPub: %p myPriv: %p\n", myBody, &noncebyte, peerPubkey, myPrivkey)
cipherKex := box.Seal(nil, myBody, noncebyte, peerPubkey, myPrivkey)
//func packMessageKX(hdr, nonce *uint32, dst, blob *[]byte) (out []byte, err error) {
out, err = packMessageKX(intHdr, context.GetNonce(), peerNick, cipherKex)
if err != nil {
return nil, &icutl.AcError{Value: -3, Msg: "CreateKXMessageNACL().packMessageKX(): ", Err: err}
}
//context.nonce++
context.IncNonce(0)
return
}