Question

我正在尝试自动生成SSH RSA密钥的过程。当在命令行上运行以下命令时，它会正确生成密钥：

ssh-keygen -f /root/.ssh/id_rsa -t rsa -N ''

当我尝试在python 2脚本中复制它时会出现问题。

 if not os.path.isfile('/root/.ssh/id_rsa.pub'):
    fullcmd = ['ssh-keygen', '-f', '/root/.ssh/id_rsa', '-t', 'rsa', '-N', '\'\'']
    sshcmd = subprocess.Popen(fullcmd,
                shell= False,
                stdout= subprocess.PIPE,
                stderr= subprocess.STDOUT)
    out = sshcmd.communicate()[0].split('\n')
    for lin in out:
        print lin

当我运行此脚本时，我收到此错误：

> passphrase too short: have 2 bytes, need >4
> Generating public/private
> rsa key pair. Saving the key failed: /root/.ssh/id_rsa.

为什么当我在命令行执行它而不是通过python脚本时它会起作用？

Answer 1

fullcmd = ['ssh-keygen', '-f', '/root/.ssh/id_rsa', '-t', 'rsa', '-N', '\'\'']

''是用于传递空字符串的shell语法。您是直接调用命令，而不是通过shell调用，因此不要传递单引号。只需传递空字符串。

fullcmd = ['ssh-keygen', '-f', '/root/.ssh/id_rsa', '-t', 'rsa', '-N', '']

SSH keygen错误：'密码太短：有2个字节，需要＆gt; 4'

1 个答案: