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an example of scp in golang
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| // https://blogs.oracle.com/janp/entry/how_the_scp_protocol_works | |
| package main | |
| import ( | |
| "fmt" | |
| "golang.org/x/crypto/ssh" | |
| ) | |
| const privateKey = `content of id_rsa` | |
| func main() { | |
| signer, _ := ssh.ParsePrivateKey([]byte(privateKey)) | |
| clientConfig := &ssh.ClientConfig{ | |
| User: "jedy", | |
| Auth: []ssh.AuthMethod{ | |
| ssh.PublicKeys(signer), | |
| }, | |
| } | |
| client, err := ssh.Dial("tcp", "127.0.0.1:22", clientConfig) | |
| if err != nil { | |
| panic("Failed to dial: " + err.Error()) | |
| } | |
| session, err := client.NewSession() | |
| if err != nil { | |
| panic("Failed to create session: " + err.Error()) | |
| } | |
| defer session.Close() | |
| go func() { | |
| w, _ := session.StdinPipe() | |
| defer w.Close() | |
| content := "123456789\n" | |
| fmt.Fprintln(w, "D0755", 0, "testdir") // mkdir | |
| fmt.Fprintln(w, "C0644", len(content), "testfile1") | |
| fmt.Fprint(w, content) | |
| fmt.Fprint(w, "\x00") // transfer end with \x00 | |
| fmt.Fprintln(w, "C0644", len(content), "testfile2") | |
| fmt.Fprint(w, content) | |
| fmt.Fprint(w, "\x00") | |
| }() | |
| if err := session.Run("/usr/bin/scp -tr ./"); err != nil { | |
| panic("Failed to run: " + err.Error()) | |
| } | |
| } |
Thank you for great job !
How can I determine "command" to send in Stdin ?
- D0775 : D for directory (?) and next chars for permissions
- C0644 : C for… create (?) and next chars for permissions
Do you have any links about theses instructions ? I searched in scp manual with no success.
[UPDATE]
I can found this post (thanks Web Archive) which gives commands availables. More, after few research it seems that SCP commands are not defined in any RFC.
@baptistedonaux God bless you! Helped me a lot!
Awesome! ty
This is working for me, and the file is copied over correctly, but the call to Run always returns an error: Process exited with status 1
session.Run("/usr/bin/scp -tr /tmp/")anyone have any clues as to why this would be?
Got it!
I was writing a binary file, so I need this in-place of fmt.Fprint(w, content):
io.Copy(w, bytes.NewReader(galaArchive))
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very interesting, however I have some doubts of my own
when I do a simple
ssh -v user@ip_addressi see the following
From what I understand is, the ssh-client first connects to the server, then picks up my
id_rsauses my current hostname to authenticate.
This script here first takes a client config and then opens the connection.
Is there a way one can do the same with go- open connection, then try with different authentication methods available and proceed with the one that succeeds?