// outputData writes data to file or stdout.
// if filename can be converted to int (decimal), then it is treated as file descriptor that has been
// opened by a parent process.
func outputData(filename string, data []byte) error {
if filename == "-" || filename == "" {
return utils.WriteStdout(data)
}
fdI, err := strconv.Atoi(filename)
if err == nil {
fd := os.NewFile(uintptr(fdI), "fd/"+filename)
defer fd.Close()
_, err := fd.Write(data)
return err
}
return utils.WriteNewFile(filename, data)
}
// CmdEncrypt encrypts data.
func CmdEncrypt() int {
var privkey, embedConstantPrivKey, embedTemporaryPrivKey, embedConstantPubKey, embedTemporaryPubKey *message.Curve25519Key
var err error
var inData, encMessage []byte
var meta *message.MetaDataSend
var signKeyPair *message.SignKeyPair
var removeFile string
if OptionsVar.Server == "" {
getPeers(false)
}
// OptionsVar.anonymous . disable private key and signkey
if OptionsVar.Anonymous {
OptionsVar.Signkey = ""
OptionsVar.Privkey = ""
GlobalConfigVar.PrivateKey = ""
}
mindelay := uint32(OptionsVar.Mindelay)
maxdelay := uint32(OptionsVar.Maxdelay)
// Read input data
maxInData := int64(GlobalConfigVar.BodyLength - (message.Curve25519KeySize * 2) - innerHeader)
//maxInData := int64(MsgSizeLimit)
if OptionsVar.Repost {
maxInData -= utils.RepostHeaderSize - message.KeyHeaderSize - message.SignHeaderSize
}
log.Debugf("Size limit: %d\n", maxInData)
inData, err = inputData(OptionsVar.Infile, maxInData)
if err != nil {
log.Fatalf("No input data: %s\n", err)
return 1
}
// Verify list contents
if OptionsVar.MessageType == message.MsgTypeList {
err := utils.VerifyListContent(inData)
if err != nil {
log.Errorf("Could not verify list input: %s\n", err)
return 1
}
}
// Select private key to use
privkeystr := selectPrivKey(OptionsVar.Privkey, GlobalConfigVar.PrivateKey, "")
// Parse privkey
if privkeystr != "" {
privkey = new(message.Curve25519Key)
copy(privkey[:], utils.B58decode(privkeystr))
}
// Generate embedded keypairs
if OptionsVar.Embedkey {
if OptionsVar.Notrace || privkey == nil {
embedConstantPrivKey, err = message.GenLongTermKey(OptionsVar.Hidden, OptionsVar.Sync)
if err != nil {
log.Errorf("Key generation error:%s\n", err)
return 1
}
} else {
embedConstantPrivKey = privkey
}
embedConstantPubKey = message.GenPubKey(embedConstantPrivKey)
embedTemporaryPrivKey, err = message.GenRandomKey()
if err != nil {
log.Errorf("Key generation error:%s\n", err)
return 1
}
embedTemporaryPubKey = message.GenPubKey(embedTemporaryPrivKey)
}
embedded := utils.EncodeEmbedded(embedConstantPubKey, embedTemporaryPubKey)
recipientConstantPubKey, recipientTemporaryPubKey := utils.ParseKeyPair(OptionsVar.Recipientkey)
// Find a signature keypair if we can
signKeyDir := ""
if GlobalConfigVar.KeyDir != "" {
signKeyDir = GlobalConfigVar.KeyDir
}
if OptionsVar.Signdir != "" {
signKeyDir = OptionsVar.Signdir
}
if OptionsVar.Signkey != "" {
var d []byte
d, err = utils.MaxReadFile(2048, OptionsVar.Signkey)
if err == nil {
signKeyPair = new(message.SignKeyPair)
kp, err := signKeyPair.Unmarshal(d)
if err != nil {
log.Errorf("Sign keypair decode error: %s\n", err)
signKeyPair = nil
} else {
signKeyPair = kp
}
} else {
log.Errorf("Sign keypair read error: %s\n", err)
}
}
if signKeyPair == nil && signKeyDir != "" {
var d []byte
d, removeFile, err = utils.ReadRandomFile(signKeyDir, 2048)
if err == nil {
signKeyPair = new(message.SignKeyPair)
kp, err := signKeyPair.Unmarshal(d)
if err != nil {
log.Errorf("Sign keypair decode error: %s\n", err)
signKeyPair = nil
removeFile = ""
} else {
signKeyPair = kp
}
} else {
log.Errorf("Sign keypair read error: %s\n", err)
}
}
// Set up sender parameters
sender := message.Sender{
Signer: signKeyPair,
SenderPrivateKey: privkey,
ReceiveConstantPublicKey: recipientConstantPubKey,
ReceiveTemporaryPublicKey: recipientTemporaryPubKey,
TotalLength: GlobalConfigVar.BodyLength,
PadToLength: GlobalConfigVar.PadToLength,
HashCashBits: GlobalConfigVar.MinHashCash,
}
// We want encryption output in realtime
log.Sync()
inData = append(embedded, inData...)
if OptionsVar.Repost {
// Generate a repost-message
encMessage, meta, err = sender.EncryptRepost(byte(OptionsVar.MessageType), inData)
if err == nil {
rph := utils.EncodeRepostHeader(meta.PadKey, mindelay, maxdelay)
encMessage = append(rph[:], encMessage...)
log.Datas("STATUS (Process):\tPREPOST\n")
log.Dataf("STATUS (RepostSettings):\t%d %d\n", mindelay, maxdelay)
}
} else {
// Generate a normal message
encMessage, meta, err = sender.Encrypt(byte(OptionsVar.MessageType), inData)
if err == nil {
log.Datas("STATUS (Process):\tPOST\n")
}
}
if err != nil {
log.Fatalf("Encryption failed: %s\n", err)
return 1
}
log.Sync()
// Output. repost is only written to stdout or file
if OptionsVar.Outfile == "-" || (OptionsVar.Repost && OptionsVar.Outfile == "") {
err = utils.WriteStdout(encMessage)
// Display data as necessary
if err == nil {
log.Dataf("STATUS (RecPubKey):\t%s\n", utils.B58encode(meta.ReceiverConstantPubKey[:]))
if OptionsVar.Embedkey {
log.Dataf("STATUS (EmbedPublicKey):\t%s_%s\n", utils.B58encode(embedConstantPubKey[:]), utils.B58encode(embedTemporaryPubKey[:]))
log.Dataf("STATUS (EmbedPrivateKey):\t%s_%s\n", utils.B58encode(embedConstantPrivKey[:]), utils.B58encode(embedTemporaryPrivKey[:]))
}
if meta.MessageKey != nil {
log.Dataf("STATUS (ListInput):\tNULL %s %s\n", utils.B58encode(meta.MessageID[:]), utils.B58encode(meta.MessageKey[:]))
log.Dataf("STATUS (Message):\t%s_%s\n", utils.B58encode(meta.MessageID[:]), utils.B58encode(meta.MessageKey[:]))
} else {
log.Dataf("STATUS (ListInput):\tNULL %s NULL\n", utils.B58encode(meta.MessageID[:]))
log.Dataf("STATUS (MessageID):\t%s\n", utils.B58encode(meta.MessageID[:]))
}
}
} else if OptionsVar.Outfile != "" || OptionsVar.Repost {
err = utils.WriteNewFile(OptionsVar.Outfile, encMessage)
// Display data as necessary
log.Dataf("STATUS (RecPubKey):\t%s\n", utils.B58encode(meta.ReceiverConstantPubKey[:]))
if err == nil {
if OptionsVar.Embedkey {
log.Dataf("STATUS (EmbedPublicKey):\t%s_%s\n", utils.B58encode(embedConstantPubKey[:]), utils.B58encode(embedTemporaryPubKey[:]))
log.Dataf("STATUS (EmbedPrivateKey):\t%s_%s\n", utils.B58encode(embedConstantPrivKey[:]), utils.B58encode(embedTemporaryPrivKey[:]))
}
if meta.MessageKey != nil {
log.Dataf("STATUS (ListInput):\tNULL %s %s\n", utils.B58encode(meta.MessageID[:]), utils.B58encode(meta.MessageKey[:]))
log.Dataf("STATUS (Message):\t%s_%s\n", utils.B58encode(meta.MessageID[:]), utils.B58encode(meta.MessageKey[:]))
log.Printf("Pastebin Address:\t%s_%s\n", utils.B58encode(meta.MessageID[:]), utils.B58encode(meta.MessageKey[:]))
} else {
log.Dataf("STATUS (ListInput):\tNULL %s NULL\n", utils.B58encode(meta.MessageID[:]))
log.Dataf("STATUS (MessageID):\t%s\n", utils.B58encode(meta.MessageID[:]))
log.Printf("Pastebin Address:\t%s\n", utils.B58encode(meta.MessageID[:]))
}
}
} else {
// Post to server
server := OptionsVar.Server
proto := repproto.New(OptionsVar.Socksserver, OptionsVar.Server, GlobalConfigVar.PasteServers...)
if server == "" {
server, err = proto.Post(meta.MessageID[:], encMessage)
} else {
err = proto.PostSpecific(server, encMessage)
}
sep := "/"
if server != "" && server[len(server)-1] == '/' {
sep = ""
}
if err == nil {
if meta.MessageKey != nil {
log.Dataf("STATUS (URL):\t%s/%s_%s\n", server, utils.B58encode(meta.MessageID[:]), utils.B58encode(meta.MessageKey[:]))
}
if OptionsVar.Embedkey {
log.Dataf("STATUS (EmbedPublicKey):\t%s_%s\n", utils.B58encode(embedConstantPubKey[:]), utils.B58encode(embedTemporaryPubKey[:]))
log.Dataf("STATUS (EmbedPrivateKey):\t%s_%s\n", utils.B58encode(embedConstantPrivKey[:]), utils.B58encode(embedTemporaryPrivKey[:]))
}
if meta.MessageKey != nil {
log.Dataf("STATUS (ListInput):\t%s %s %s\n", server, utils.B58encode(meta.MessageID[:]), utils.B58encode(meta.MessageKey[:]))
log.Dataf("STATUS (Message):\t%s_%s\n", utils.B58encode(meta.MessageID[:]), utils.B58encode(meta.MessageKey[:]))
log.Printf("Pastebin Address:\t%s%s%s_%s\n", server, sep, utils.B58encode(meta.MessageID[:]), utils.B58encode(meta.MessageKey[:]))
} else {
log.Dataf("STATUS (ListInput):\t%s %s NULL\n", server, utils.B58encode(meta.MessageID[:]))
log.Dataf("STATUS (MessageID):\t%s\n", utils.B58encode(meta.MessageID[:]))
log.Printf("Pastebin Address:\t%s%s%s\n", server, sep, utils.B58encode(meta.MessageID[:]))
}
}
}
if err != nil {
log.Fatalf("Output failed: %s\n", err)
log.Sync()
return 1
}
if removeFile != "" {
// Operation has been successful, remove signer keyfile (if any)
os.Remove(removeFile)
}
return 0
}
// CmdShowConfig prints current config to stdout
func CmdShowConfig() int {
x, _ := json.MarshalIndent(GlobalConfigVar, "", " ")
utils.WriteStdout(x)
utils.WriteStdout([]byte("\n"))
return 0
}