如何使 ssh-add 从文件中读取密码? [英] How to make ssh-add read passphrase from a file?

问题描述

我正在尝试向 ssh-agent 添加一个密钥，并希望 ssh-add 从我正在使用的密钥文件中读取密码.这怎么可能?

I am trying to add a key to ssh-agent and want ssh-add to read the password from the key file I'm using. How is this possible?

如何从 shell 脚本自动执行此过程?

How do I automate this process from the shell script?

推荐答案

根据您的发行版和 ssh-add 的版本，您可以使用或不使用 ssh 的 -p 选项-添加以这种方式从标准输入读取密码:

Depending on your distribution and on the version of ssh-add you may be able or not to use the -p option of ssh-add that reads the passphrase from stdin in this way:

cat passfile | ssh-add -p keyfile

如果这不起作用，您可以使用 Expect，一个 Unix 工具使交互式应用程序非交互式.你必须从你的包管理器安装它.

If this is not working you can use Expect, a Unix tool to make interactive applications non-interactive. You'll have to install it from your package manager.

我已经为您编写了一个工具.只需将内容复制到名为 ssh-add-pass 的文件中并为其设置可执行权限(chmod +x ssh-add-pass).您也可以将其复制到/usr/bin 或/usr/local/bin 以便从 $PATH 搜索中访问.

I have written a tool for you in expect. Just copy the content in a file named ssh-add-pass and set executable permissions on it (chmod +x ssh-add-pass). You can also copy it to /usr/bin or /usr/local/bin to be accessible from the $PATH search.

#!/bin/bash

if [ $# -ne 2 ] ; then
  echo "Usage: ssh-add-pass keyfile passfile"
  exit 1
fi

eval $(ssh-agent)
pass=$(cat $2)

expect << EOF
  spawn ssh-add $1
  expect "Enter passphrase"
  send "$pass
"
  expect eof
EOF

用法很简单:ssh-add-pass keyfile passfile

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