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package main
import (
"flag"
"fmt"
"io"
"log"
"net"
"os"
"time"
"snix.ir/rabaead"
"snix.ir/rabbitio"
)
func main() {
encFlag := flag.NewFlagSet("encrypt", flag.ExitOnError)
decFlag := flag.NewFlagSet("decrypt", flag.ExitOnError)
flag.Usage = flagUsage
if len(os.Args) < 2 {
flag.Usage()
os.Exit(1)
}
switch os.Args[1] {
case "server":
server(encFlag)
case "client":
client(decFlag)
default:
flag.Usage()
os.Exit(1)
}
}
func flagUsage() {
fmt.Printf(`usage of %v: commands <args...|help>
commands:
server <args...> encrypt files with rabbit poly1305 aead cipher
client <args...> decrypt files with rabbit poly1305 aead cipher
Copyright (c) 2022 snix.ir, All rights reserved.
Developed BY <Sina Ghaderi> sina@snix.ir
This work is licensed under the terms of GNU General Public license.
Github: github.com/sina-ghaderi and Source: git.snix.ir
`, os.Args[0])
}
func server(flagset *flag.FlagSet) {
plain := flagset.String("net", "127.0.0.1:7899", "network tcp listen address")
keyva := flagset.String("key", "", "rabbit key string, must be 16-byte len")
ivxva := flagset.String("ivx", "", "rabbit iv string, must be 8-byte or nothing")
flagset.Parse(os.Args[2:])
ivb := []byte(*ivxva)
if len(ivb) != rabbitio.IVXLen && len(ivb) != 0 {
log.Fatal(rabbitio.ErrInvalidIVX)
}
aead, err := rabaead.NewAEAD([]byte(*keyva))
if err != nil {
log.Fatal(err)
}
l, err := net.Listen("tcp", *plain)
if err != nil {
log.Fatal(err)
}
for {
conn, err := l.Accept()
if err != nil {
log.Print(err)
continue
}
writer, _ := rabaead.NewChunkWriter(conn, 16, aead, ivb, nil)
go handleServerConn(writer, conn)
}
}
func handleServerConn(w io.WriteCloser, conn net.Conn) {
defer conn.Close()
if _, err := w.Write([]byte(time.Now().String())); err != nil {
log.Print(err)
return
}
}
func client(flagset *flag.FlagSet) {
plain := flagset.String("net", "127.0.0.1:7899", "network tcp dial address")
keyva := flagset.String("key", "", "rabbit key string, must be 16-byte len")
ivxva := flagset.String("ivx", "", "rabbit iv string, must be 8-byte or nothing")
flagset.Parse(os.Args[2:])
ivb := []byte(*ivxva)
aead, err := rabaead.NewAEAD([]byte(*keyva))
if err != nil {
log.Fatal(err)
}
conn, err := net.Dial("tcp", *plain)
if err != nil {
log.Fatal(err)
}
defer conn.Close()
reader, err := rabaead.NewChunkReader(conn, 16, aead, ivb, nil)
if err != nil {
log.Fatal(err)
}
ntms := []byte{}
buff := make([]byte, 16)
for {
n, err := reader.Read(buff)
if err != nil {
if err == io.EOF {
ntms = append(ntms, buff[:n]...)
break
}
log.Fatal(err)
}
ntms = append(ntms, buff...)
}
log.Printf("server time: %v", string(ntms))
}
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