如何隐藏ssh期望用户/密码 [英] how to hide ssh expect user/password

问题描述

我的Expect脚本以明文形式显示密码/用户，我想将其隐藏.

My Expect script shows password/user in clear text and I want to hide it.

#!/usr/local/bin/expect
###########################################################################################    ############
# Input: It will handle two arguments -> a device and a show command.
###########################################################################################    ############
# ######### Start of Script ######################
# #### Set up Timeouts - Debugging Variables
log_user 0
set timeout 10
set userid  "USER"
set password  "PASS"
# ############## Get two arguments - (1) Device (2) Command to be executed
set device  [lindex $argv 0] 
set command [lindex $argv 1]
spawn /usr/local/bin/ssh -l $userid $device
match_max [expr 32 * 1024]
expect {
    -re "RSA key fingerprint" {send "yes\r"}
    timeout {puts "Host is known"}
}
expect {
    -re "username: " {send "$userid\r"} 
    -re "(P|p)assword: " {send "$password\r"}
     -re "Warning:" {send "$password\r"}
    -re "Connection refused" {puts "Host error -> $expect_out(buffer)";exit}
    -re "Connection closed"  {puts "Host error -> $expect_out(buffer)";exit}
   -re "no address.*" {puts "Host error -> $expect_out(buffer)";exit}
    timeout {puts "Timeout error. Is device down or unreachable?? ssh_expect";exit}
}
expect {
   -re "\[#>]$" {send "term len 0\r"}
   timeout {puts "Error reading prompt -> $expect_out(buffer)";exit}
}
expect {
   -re "\[#>]$" {send "$command\r"}
   timeout {puts "Error reading prompt -> $expect_out(buffer)";exit}
}
expect -re "\[#>]$"
set output $expect_out(buffer)
send "exit\r"
puts "$output\r\n"

推荐答案

...并添加-OUseBatchMode=Yes，以便如果您的密钥有问题，ssh将立即失败(您可以验证退出代码)，而不仅仅是退回到密码模式并挂起(因为您正在交互式运行)

... and add -OUseBatchMode=Yes so that if there is a problem with your keys, ssh will fail immediately (you can verify exit code) rather than just falling back to password mode and hanging (as you are running interactively)

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