ssh passphrase 测试

前提

本文用于针对云平台下的 VM 中的 vclound 用户利用 ssh 密钥登录进行的测试
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测试目标

vclound 用户需要利用 ssh key 进行登录ssh key 验证时需要输入 passphrase 进行校验在脚本中需要对多台电脑进行 vclound 用户登录测试时候,   进行 key 校验过程中, 只需要输入一次 passphrase 即可同时以 vclound 用户登录多台电脑
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测试机器

ip address	role
192.168.209.100	controll server
192.168.209.101	ssh 测试对象
192.168.209.102	ssh 测试对象
192.168.209.103	ssh 测试对象
192.168.209.104	ssh 测试对象

创建用户

useradd vclound
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为 vclound 用户创建 passphrase

[vclound@gz-controller-209100 ~]$ ssh-keygenGenerating public/private rsa key pair.Enter file in which to save the key (/home/vclound/.ssh/id_rsa):Created directory '/home/vclound/.ssh'.Enter passphrase (empty for no passphrase):   <- 输入 passphraseEnter same passphrase again:                  <- 重复输入 passphraseYour identification has been saved in /home/vclound/.ssh/id_rsa.Your public key has been saved in /home/vclound/.ssh/id_rsa.pub.The key fingerprint is:f4:d6:d0:03:c6:7c:b8:e8:54:80:57:d8:8f:1d:ce:68 [e-mail] key's randomart image is:+--[ RSA 2048]----+|       ..B+.     ||      . o.*oo    ||       ..o.Xo.   ||       .o.Eo=.   ||       oS.o .    ||        ..       ||                 ||                 ||                 |+-----------------+
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为 ssh 测试对象创建 vclound 用户

[root@gz-controller-209100 ~]# ssh 192.168.209.101 useradd vclound[root@gz-controller-209100 ~]# ssh 192.168.209.102 useradd vclound[root@gz-controller-209100 ~]# ssh 192.168.209.103 useradd vclound[root@gz-controller-209100 ~]# ssh 192.168.209.104 useradd vclound
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传输 ssh key 到 ssh 测试对象

[root@gz-controller-209100 ~]# ssh 192.168.209.101 mkdir /home/vclound/.ssh/[root@gz-controller-209100 ~]# ssh 192.168.209.102 mkdir /home/vclound/.ssh/[root@gz-controller-209100 ~]# ssh 192.168.209.103 mkdir /home/vclound/.ssh/[root@gz-controller-209100 ~]# ssh 192.168.209.104 mkdir /home/vclound/.ssh/[root@gz-controller-209100 ~]# scp /home/vclound/.ssh/id_rsa.pub  192.168.209.101:/home/vclound/.ssh/authorized_keysid_rsa.pub                                                                                  100%  422     0.4KB/s   00:00[root@gz-controller-209100 ~]# scp /home/vclound/.ssh/id_rsa.pub  192.168.209.102:/home/vclound/.ssh/authorized_keysid_rsa.pub                                                                                  100%  422     0.4KB/s   00:00[root@gz-controller-209100 ~]# scp /home/vclound/.ssh/id_rsa.pub  192.168.209.103:/home/vclound/.ssh/authorized_keysid_rsa.pub                                                                                  100%  422     0.4KB/s   00:00[root@gz-controller-209100 ~]# scp /home/vclound/.ssh/id_rsa.pub  192.168.209.104:/home/vclound/.ssh/authorized_keysid_rsa.pub                                                                                  100%  422     0.4KB/s   00:00
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创建脚本测试

[vclound@gz-controller-209100 ~]$ cat /home/vclound/ssh_test.sh#!/bin/bash# just test ssh login and show up ip address# terry tsangfor id in 1 2 3 4do  ssh 192.168.209.10$id /sbin/ifconfig bond0 |  awk -F[:\ ] '/netmask/ {print $10}'done
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参见下面执行方法

注: 在执行 ssh-agent bash 后, 将会产生 bash 子进程, 并且利用 ssh-add 导入 id_rsa 后, 将需要输入 passphrase , 并把密钥信息保存到当前 bash 中, 在执行脚本后, 建议执行 exit 退出该 shell

[vclound@gz-controller-209100 ~]$ ssh-agent bash[vclound@gz-controller-209100 ~]$ ssh-add /home/vclound/.ssh/id_rsaEnter passphrase for /home/vclound/.ssh/id_rsa:   <- 输入 passphraseIdentity added: /home/vclound/.ssh/id_rsa (/home/vclound/.ssh/id_rsa)[vclound@gz-controller-209100 ~]$ ./ssh_test.sh192.168.209.101192.168.209.102192.168.209.103192.168.209.104
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修改 passphrase 方法

[vclound@gz-controller-209100 ~]$ ssh-keygen -pEnter file in which the key is (/home/vclound/.ssh/id_rsa):    <- 输入私钥存放位置Enter old passphrase:                                          <- 输入旧的 passphrase Key has comment '/home/vclound/.ssh/id_rsa'Enter new passphrase (empty for no passphrase):                <- 输入新的 passphraseEnter same passphrase again:                                   <- 重复输入新的 passphraseYour identification has been saved with the new passphrase.
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测试新 passphrase

[vclound@gz-controller-209100 ~]$ ssh-agent bash[vclound@gz-controller-209100 ~]$  ssh-add /home/vclound/.ssh/id_rsaEnter passphrase for /home/vclound/.ssh/id_rsa:                           <- 输入新的 passphrase Identity added: /home/vclound/.ssh/id_rsa (/home/vclound/.ssh/id_rsa)[vclound@gz-controller-209100 ~]$ ./ssh_test.sh192.168.209.101192.168.209.102192.168.209.103192.168.209.104[vclound@gz-controller-209100 ~]$ exit                                     <- 退出 ssh-agent shellexit[vclound@gz-controller-209100 ~]$
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