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
}
func CTOPEN_Handler(acMessageCtReq *AcCipherTextMessageRequest) (acMsgResponse *AcCipherTextMessageResponse, err error) {
var responseType AcCipherTextMessageResponseAcCTRespMsgType
responseType = AcCipherTextMessageResponse_CTR_OPEN
var acctx *ackp.SecKey
channel := acMessageCtReq.GetChannel()
peernick := acMessageCtReq.GetNick()
reqServ := acMessageCtReq.GetServer()
blob := acMessageCtReq.GetBlob()
reqOpt := acMessageCtReq.GetOpt() // XXX will be used for myNick
acutl.DebugLog.Printf("(CALL) CTOPEN %s/%s from %s:'%s' (%s)\n", channel, reqServ, peernick, blob, reqOpt)
if len(channel) == 0 || len(peernick) == 0 || len(blob) == 0 {
retErr := &acutl.AcError{Value: -1, Msg: "CTOPEN_Handler().args(channel|serv|mynick): 0 bytes", Err: nil}
acMsgResponse = &AcCipherTextMessageResponse{
Type: &responseType,
Bada: proto.Bool(false),
ErrorCode: proto.Int32(-1),
}
acutl.DebugLog.Printf("(RET[!]) CTOPEN -> (-1) ! %s\n", retErr.Error())
return acMsgResponse, retErr
}
//acctx, ok_a := Sk[channel]
acctx, ok_a := ackp.ACmap.GetSKMapEntry(reqServ, channel)
if ok_a == false {
retErr := &acutl.AcError{Value: -2, Msg: "CTOPEN_Handler(): no SKMap Entry found!", Err: nil}
acMsgResponse = &AcCipherTextMessageResponse{
Type: &responseType,
Bada: proto.Bool(false),
ErrorCode: proto.Int32(-2),
}
acutl.DebugLog.Printf("(RET[!]) CTOPEN -> (-2) ! %s\n", retErr.Error())
return acMsgResponse, retErr
}
acrnd, ok_b := ackp.ACmap.GetRDMapEntry(reqServ, channel)
if ok_b == false {
retErr := &acutl.AcError{Value: -3, Msg: "CTOPEN_Handler(): no RDMap Entry found!", Err: nil}
acMsgResponse = &AcCipherTextMessageResponse{
Type: &responseType,
Bada: proto.Bool(false),
ErrorCode: proto.Int32(-3),
}
acutl.DebugLog.Printf("(RET[!]) CTOPEN -> (-3) ! %s\n", retErr.Error())
return acMsgResponse, retErr
}
//func OpenACMessage(context * SecKey, cmsg, peerNick []byte) (out []byte, err error) {
// XXX TODO: use reqOpt accordingly
out, err := accp.OpenACMessageNACL(acctx, acrnd, blob, []byte(peernick), []byte(reqOpt))
if err != nil {
retErr := &acutl.AcError{Value: -4, Msg: "CTOPEN_Handler(): OpenACMessageNACL() error!", Err: err}
acMsgResponse = &AcCipherTextMessageResponse{
Type: &responseType,
Bada: proto.Bool(false),
ErrorCode: proto.Int32(-4),
}
acutl.DebugLog.Printf("(RET[!]) CTOPEN -> (-4) ! %s\n", retErr.Error())
return acMsgResponse, retErr
}
acMsgResponse = &AcCipherTextMessageResponse{
Type: &responseType,
Bada: proto.Bool(true),
ErrorCode: proto.Int32(0),
Nonce: proto.Uint32(acctx.GetNonce()),
Blob: [][]byte{out},
}
acutl.DebugLog.Printf("(RET) CTOPEN -> (0) ! %s/%s %s's msg opened\n", reqServ, channel, peernick)
return acMsgResponse, nil
}
func CTSEAL_Handler(acMessageCtReq *AcCipherTextMessageRequest) (acMsgResponse *AcCipherTextMessageResponse, err error) {
var responseType AcCipherTextMessageResponseAcCTRespMsgType
responseType = AcCipherTextMessageResponse_CTR_SEAL
var acctx *ackp.SecKey
var acBlobArray [][]byte
var out []byte
var reqBlobTmp []byte
reqChan := acMessageCtReq.GetChannel()
myNick := acMessageCtReq.GetNick()
reqServ := acMessageCtReq.GetServer()
reqBlob := acMessageCtReq.GetBlob()
acutl.DebugLog.Printf("(CALL) CTSEAL (%s/%s %s:'%s')\n", reqChan, reqServ, myNick, reqBlob)
if len(reqChan) == 0 || len(myNick) == 0 || len(reqBlob) == 0 {
retErr := &acutl.AcError{Value: -1, Msg: "CTSEAL_Handler().args(channel|serv|mynick): 0 bytes", Err: nil}
acMsgResponse = &AcCipherTextMessageResponse{
Type: &responseType,
Bada: proto.Bool(false),
ErrorCode: proto.Int32(-1),
}
acutl.DebugLog.Printf("(RET[!]) CTSEAL -> (-1) ! %s\n", retErr.Error())
return acMsgResponse, retErr
}
acctx, ok_a := ackp.ACmap.GetSKMapEntry(reqServ, reqChan)
if ok_a == false {
retErr := &acutl.AcError{Value: -2, Msg: "CTSEAL_Handler(): no SKMap found!", Err: nil}
acMsgResponse = &AcCipherTextMessageResponse{
Type: &responseType,
Bada: proto.Bool(false),
ErrorCode: proto.Int32(-2),
}
acutl.DebugLog.Printf("(RET[!]) CTSEAL -> (-2) ! %s\n", retErr.Error())
return acMsgResponse, retErr
}
acrnd, ok_b := ackp.ACmap.GetRDMapEntry(reqServ, reqChan)
if ok_b == false {
retErr := &acutl.AcError{Value: -3, Msg: "CTSEAL_Handler(): no RDMap found!", Err: nil}
acMsgResponse = &AcCipherTextMessageResponse{
Type: &responseType,
Bada: proto.Bool(false),
ErrorCode: proto.Int32(-3),
}
acutl.DebugLog.Printf("(RET[!]) CTSEAL -> (-3) ! %s\n", retErr.Error())
return acMsgResponse, retErr
}
// XXX test here for message length and send multiple encrypted messages
// TODO: dont hardcode the limits but well it's a first try
// back if the original message is too long.
/*
if len(out)+14+len(reqChan) > 512 {
fmt.Fprintf(os.Stderr, "MESSAGE WAYYYYYY TOO LONG LET's SPLIT AND BUILD SEVERAL")
}
*/
//tmpBlobLen := len(reqBlob)
//:nick!user@host PRIVMSG target :<usable bytes><CRLF>
msgLen := accp.PredictLenNACL(reqBlob) + len(reqChan) + 14
nBlock := msgLen/410 + 1
//for msgLen, nBlock := accp.PredictLenNACL(tmpBlobLen)+len(reqChan)+14, 1; msgLen > 510; msgLen, nBlock = accp.PredictLenNACL(reqBlob)+len(reqChan)+14, nBlock+1 {
/*
for ; msgLen > 510; msgLen, nBlock = (accp.PredictLenNACL(reqBlob)+len(reqChan)+14)/nBlock, nBlock+1 {
fmt.Fprintf(os.Stderr, ">>block size: %d numblock: %d\n", msgLen, nBlock)
}
nBlock--
*/
// BUG HERE with offsets...
for j, bSize, bAll, bPtr := 0, len(reqBlob)/nBlock, len(reqBlob), 0; j < nBlock; j, bPtr = j+1, bPtr+bSize {
if bPtr+bSize+1 >= bAll {
reqBlobTmp = reqBlob[bPtr:]
//fmt.Fprintf(os.Stderr, "** %d block[%d:%d]: %s \n", j, bPtr, bAll, reqBlobTmp)
//fmt.Fprintf(os.Stderr, ">> %d => %c || %d => %c\n", bAll, reqBlob[bAll-1], bAll+1, reqBlob[bAll+1])
//reqBlob[bPtr:bAll]
} else {
reqBlobTmp = reqBlob[bPtr : bPtr+bSize]
//fmt.Fprintf(os.Stderr, ">>#%d block[%d:%d]: %s \n", j, bPtr, bPtr+bSize, reqBlobTmp)
//reqBlob[bPtr : bPtr+bSize]
} // END OF ELSE
//fmt.Fprintf(os.Stderr, ">> NEW #%d block[%d:%d]: %s \n", j, bPtr, bPtr+len(reqBlobTmp), reqBlobTmp)
out, err = accp.CreateACMessageNACL(acctx, acrnd, reqBlobTmp, []byte(myNick))
if err != nil {
retErr := &acutl.AcError{Value: -4, Msg: "CTSEAL_Handler(): CreateACMessageNACL()!", Err: err}
acMsgResponse = &AcCipherTextMessageResponse{
Type: &responseType,
Bada: proto.Bool(false),
ErrorCode: proto.Int32(-4),
}
acutl.DebugLog.Printf("(RET[!]) CTSEAL -> (-4) ! %s\n", retErr.Error())
return acMsgResponse, retErr
}
acBlobArray = append(acBlobArray, out)
} // END OF FOR
acMsgResponse = &AcCipherTextMessageResponse{
Type: &responseType,
Bada: proto.Bool(true),
ErrorCode: proto.Int32(0), // should be good enough for now... but better have a separate field with correct type..
Nonce: proto.Uint32(acctx.GetNonce()),
Blob: acBlobArray,
}
//fmt.Fprintf(os.Stderr, "[+] CTSEAL -> (R) 0 ! %s/%s %s's msg sealed\n", reqServ, reqChan, myNick)
acutl.DebugLog.Printf("(RET) CTSEAL -> (0) ! %s/%s %s's msg sealed\n", reqServ, reqChan, myNick)
return acMsgResponse, nil
}
func CreateKXMessageNACL(context *ackp.SecKey, 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, &acutl.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 := acutl.CompressData(context.GetKey())
if err != nil {
return nil, &acutl.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, &acutl.AcError{Value: -3, Msg: "CreateKXMessageNACL().packMessageKX(): ", Err: err}
}
//context.nonce++
context.IncNonce(0)
return
}