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Hint to user when ssh server key is not known (#885) 

Signed-off-by: Matej Vasek <mvasek@redhat.com>
This commit is contained in:
Matej Vasek 2022-03-08 19:08:05 +01:00 committed by GitHub
parent 2d23c9cd1f
commit 917a8efdb2
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1 changed files with 4 additions and 1 deletions
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5
ssh/terminal.go
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@ -3,6 +3,7 @@ package ssh
import ( import (
"bufio" "bufio"
"bytes" "bytes"
"encoding/base64"
"errors" "errors"
"fmt" "fmt"
"io" "io"
@ -99,7 +100,7 @@ func NewHostKeyCbk() HostKeyCallback {
msg := `The authenticity of host %s cannot be established. msg := `The authenticity of host %s cannot be established.
%s key fingerprint is %s %s key fingerprint is %s
Are you sure you want to continue connecting (yes/no)? ` Are you sure you want to continue connecting (yes/no)? `
fmt.Fprintf(os.Stdout, msg, hostPort, pubKey.Type(), ssh.FingerprintSHA256(pubKey)) fmt.Fprintf(os.Stderr, msg, hostPort, pubKey.Type(), ssh.FingerprintSHA256(pubKey))
reader := bufio.NewReader(os.Stdin) reader := bufio.NewReader(os.Stdin)
answer, err := reader.ReadString('\n') answer, err := reader.ReadString('\n')
if err != nil { if err != nil {
@ -110,6 +111,8 @@ Are you sure you want to continue connecting (yes/no)? `
if answer == "yes" || answer == "y" { if answer == "yes" || answer == "y" {
trust = pubKey.Marshal() trust = pubKey.Marshal()
fmt.Fprintf(os.Stderr, "To avoid this in future add following line into your ~/.ssh/known_hosts:\n%s %s %s\n",
hostPort, pubKey.Type(), base64.StdEncoding.EncodeToString(trust))
return nil return nil
} }