func main() {
var help = flag.Bool("h", false, "help")
var ip = flag.String("i", "127.0.0.1", "ip address")
var port = flag.String("p", "8002", "port")
flag.Parse()
if *help || flag.NArg() != 1 {
fmt.Printf("USAGE: encrypt0 <string>\n")
flag.PrintDefaults()
return
}
utils.Version()
debug := utils.NewDebug(utils.USER, "encrypt0")
debug.Printf("Alg/Mode/Padding = %s", AMP)
key, e := aeskey.Key()
if e != nil {
fmt.Printf("AES key error: %v\n", e)
os.Exit(1)
}
debug.PrintBuffer(key, "Key = ")
iv, e := aeskey.Iv()
if e != nil {
fmt.Printf("AES IV error: %v\n", e)
return
}
debug.PrintBuffer(iv, "IV = ")
laddr := "" + *ip + ":" + *port
addr, e := net.ResolveTCPAddr("tcp", laddr)
if e != nil {
fmt.Printf("Cannot resolve address %s\n", laddr)
os.Exit(1)
}
conn, e := net.DialTCP("tcp", nil, addr)
if e != nil {
fmt.Printf("Dialed failed on address %s\n", laddr)
os.Exit(2)
}
defer func() {
conn.Close()
}()
fmt.Printf("Connected to remote address %s\n", conn.RemoteAddr())
fmt.Printf("Connected from local address %s\n", conn.LocalAddr())
pbuff := utils.MakeByteOEncoding(2048)
e = pbuff.WriteString(flag.Arg(0))
if e != nil {
fmt.Printf("Error: %s\n", e)
os.Exit(1)
}
e = pbuff.WriteBinary([]byte(flag.Arg(0)))
if e != nil {
fmt.Printf("Error: %s\n", e)
os.Exit(1)
}
plaintext, e := pbuff.GetBuffer()
if e != nil {
fmt.Printf("Error: %s\n", e)
os.Exit(1)
}
debug.PrintBuffer(plaintext, "Plaintext encoding for T1,B =")
ciphertext, e := utils.Encrypt(AMP, iv, key[0:], plaintext)
if e != nil {
fmt.Printf("Encryption error: %v\n", e)
}
debug.PrintBuffer(ciphertext, "Ciphertext of encoding for T1,B =")
obuff := utils.MakeTcpOEncoding(conn)
debug.Printf("Sending ciphertext as binary encoding")
e = obuff.WriteBinary(ciphertext)
if e != nil {
fmt.Printf("Error: %s\n", e)
os.Exit(1)
}
ibuff := utils.MakeTcpIEncoding(conn)
debug.Printf("Reading ciphertext as binary encoding")
ciphertext, e = ibuff.ReadBinary()
if e != nil {
fmt.Printf("Error: %s\n", e)
os.Exit(1)
}
debug.PrintBuffer(ciphertext, "Ciphertext = ")
plaintext, e = utils.Decrypt(AMP, iv, key[0:], ciphertext)
if e != nil {
fmt.Printf("Decryption error: %v\n", e)
}
debug.PrintBuffer(plaintext, "Plaintext encoding of B,T2 = ")
cbuff := utils.MakeByteIEncoding(plaintext)
debug.Printf("Reading buffer B")
b, e := cbuff.ReadBinary()
if e != nil {
fmt.Printf("Error: %s\n", e)
os.Exit(1)
}
debug.PrintBuffer(b, "B = ")
debug.Printf("Reading string T2")
s, e := cbuff.ReadString()
if e != nil {
fmt.Printf("Error: %s\n", e)
os.Exit(1)
}
debug.Printf("T2 = %s", s)
fmt.Printf("String received = %s\n", s)
fmt.Printf("Binary data received contained %d bytes\n", len(b))
}
func worker(name string, conn *net.TCPConn) {
debug := utils.NewDebug(utils.SYSTEM, name)
defer func() {
fmt.Printf("... %s worker finished.\n", name)
conn.Close()
}()
key, e := aeskey.Key()
if e != nil {
fmt.Printf("%s AES key error: %v\n", name, e)
return
}
iv, e := aeskey.Iv()
if e != nil {
fmt.Printf("%s AES IV error: %v\n", name, e)
return
}
fmt.Printf("%s worker connected to remote address %s\n", name, conn.RemoteAddr())
ibuff := utils.MakeTcpIEncoding(conn)
debug.Printf("Reading ciphertext as binary encoding")
ciphertext, e := ibuff.ReadBinary()
if e != nil {
fmt.Printf("%s Error: %v\n", name, e)
return
}
debug.PrintBuffer(ciphertext, "Ciphertext = ")
plaintext, e := utils.Decrypt(AMP, iv, key[0:], ciphertext)
if e != nil {
fmt.Printf("%s Error: %v\n", name, e)
return
}
debug.PrintBuffer(plaintext, "Plaintext encoding of T1,B = ")
cbuff := utils.MakeByteIEncoding(plaintext)
debug.Printf("Reading string T1")
s, e := cbuff.ReadString()
if e != nil {
fmt.Printf("%s Error: %v\n", name, e)
return
}
debug.Printf("T1 = %s", s)
debug.Printf("Reading buffer B")
b, e := cbuff.ReadBinary()
if e != nil {
fmt.Printf("%s Error: %v\n", name, e)
return
}
debug.PrintBuffer(b, "B = ")
fmt.Printf("You sent the string \"%s\"\n", s)
fmt.Printf("and the binary data of length %d\n", len(b))
obuff := utils.MakeTcpOEncoding(conn)
pbuff := utils.MakeByteOEncoding(2048)
e = pbuff.WriteBinary(b)
if e != nil {
fmt.Printf("%s Error: %v\n", name, e)
return
}
e = pbuff.WriteString("God is alive. He just doesn't want to get involved.")
if e != nil {
fmt.Printf("%s Error: %v\n", name, e)
return
}
plaintext, e = pbuff.GetBuffer()
if e != nil {
fmt.Printf("%s Error: %v\n", name, e)
return
}
debug.PrintBuffer(plaintext, "plaintext encoding of B,T2 = ")
ciphertext, e = utils.Encrypt(AMP, iv, key[0:], plaintext)
if e != nil {
fmt.Printf("%s Error: %v\n", name, e)
return
}
debug.PrintBuffer(ciphertext, "Sending binary encoding of ciphertext =")
e = obuff.WriteBinary(ciphertext)
if e != nil {
fmt.Printf("%s Error: %v\n", name, e)
return
}
}
func worker(name string, conn *net.TCPConn) {
defer func() {
fmt.Printf("... %s worker finished.\n", name)
conn.Close()
}()
debug := utils.NewDebug(utils.USER, name)
key, e := aeskey.Key()
if e != nil {
fmt.Printf("%s AES key error: %v\n", name, e)
return
}
iv, e := aeskey.Iv()
if e != nil {
fmt.Printf("%s AES IV error: %v\n", name, e)
return
}
fmt.Printf("%s worker connected to remote address %s\n", name, conn.RemoteAddr())
ibuff := utils.MakeTcpIEncoding(conn)
debug.Printf("Reading ciphertext as binary encoding")
ciphertext, e := ibuff.ReadBinary()
if e != nil {
fmt.Printf("%s Error: %v\n", name, e)
return
}
debug.PrintBuffer(ciphertext, "Ciphertext = ")
plaintext, e := utils.Decrypt(AMP, iv, key[0:], ciphertext)
if e != nil {
fmt.Printf("%s Error: %v\n", name, e)
return
}
debug.PrintBuffer(plaintext, "Plaintext encoding of {T1,B} = ")
sbuff := utils.MakeByteIEncoding(plaintext)
debug.Printf("Reading structured data {T1,B}")
body, e := sbuff.ReadStructured()
if e != nil {
fmt.Printf("%s Error: %v\n", name, e)
return
}
debug.PrintBuffer(body, "Encoding for T1,B = ")
cbuff := utils.MakeByteIEncoding(body)
s, e := cbuff.ReadString()
debug.Printf("Reading string T1")
if e != nil {
fmt.Printf("%s Error: %v\n", name, e)
return
}
debug.Printf("T1 = %s", s)
debug.Printf("Reading buffer B")
b, e := cbuff.ReadBinary()
if e != nil {
fmt.Printf("%s Error: %v\n", name, e)
return
}
debug.PrintBuffer(b, "B = ")
fmt.Printf("You sent the string \"%s\"\n", s)
fmt.Printf("and the binary data of length %d\n", len(b))
obuff := utils.MakeTcpOEncoding(conn)
tbuff := utils.MakeByteOEncoding(2048)
e = tbuff.WriteBinary(b)
if e != nil {
fmt.Printf("%s Error: %v\n", e)
return
}
e = tbuff.WriteString("Along come the scientists and make the words of our fathers into folklore.")
if e != nil {
fmt.Printf("%s Error: %v\n", name, e)
return
}
body, e = tbuff.GetBuffer()
if e != nil {
fmt.Printf("%s Error: %v\n", name, e)
return
}
pbuff := utils.MakeByteOEncoding(2048)
e = pbuff.WriteStructured(body)
if e != nil {
fmt.Printf("%s Error: %v\n", e)
return
}
plaintext, e = pbuff.GetBuffer()
if e != nil {
fmt.Printf("%s Error: %v\n", name, e)
return
}
debug.PrintBuffer(plaintext, "plaintext encoding of {B,T2} = ")
ciphertext, e = utils.Encrypt(AMP, iv, key[0:], plaintext)
if e != nil {
fmt.Printf("%s Error: %v\n", name, e)
return
}
debug.PrintBuffer(ciphertext, "Sending binary encoding of ciphertext =")
e = obuff.WriteBinary(ciphertext)
if e != nil {
fmt.Printf("%s Error: %v\n", name, e)
return
}
}