在 Python 中验证 Telnet 会话的身份验证

发布于 2024-11-13 11:43:28 字数 1085 浏览 3 评论 0原文

我正在尝试远程登录到思科交换机并在其上运行几个命令。我可以检查主机是否不存在，但不确定如何检查用户名或密码是否正确。这是我到目前为止得到的（这是我课程的一部分）

def login(self):
    if self.user_name and self.password: 
        try:
            self.connection=telnetlib.Telnet(self.telnet_host)
            try:
                self.connection.read_until('sername:',1)
                self.connection.write(self.user_name+'\r\n')
                self.connection.read_until('assword:',1)
                self.connection.write(self.password+'\r\n')
                self.connection.read_until(self.prompt,1)
                print "Connected"
                self.loggedON=True
            except EOFError:
                print "Authentication to "+ self.telnet_host+" failed.\n"
                return
        except: 
            print "Can't connect to "+self.telnet_host+"\n"
            return
    else:
        if not self.user_name:
            self.user_name=raw_input("Username: ")
            self.login()
        else:
            self.password=raw_input("Password: ")
            self.login()

即使密码或用户名错误，它仍然会说它已连接。

原文

I am trying to telnet into a Cisco Switch and run a couple of commands on it. I am able to check if the host doesn't exist, not sure how to check if the username or password is correct. This is what I got so far(This is part of my class)

def login(self):
    if self.user_name and self.password: 
        try:
            self.connection=telnetlib.Telnet(self.telnet_host)
            try:
                self.connection.read_until('sername:',1)
                self.connection.write(self.user_name+'\r\n')
                self.connection.read_until('assword:',1)
                self.connection.write(self.password+'\r\n')
                self.connection.read_until(self.prompt,1)
                print "Connected"
                self.loggedON=True
            except EOFError:
                print "Authentication to "+ self.telnet_host+" failed.\n"
                return
        except: 
            print "Can't connect to "+self.telnet_host+"\n"
            return
    else:
        if not self.user_name:
            self.user_name=raw_input("Username: ")
            self.login()
        else:
            self.password=raw_input("Password: ")
            self.login()

It will still say it is connected even if the wrong password or username.

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行至春深 2024-11-20 11:43:28

您还可以尝试 Exscript：

from Exscript.util.start import quickstart

def do_something(conn):
    conn.autoinit()
    conn.execute('show version')

quickstart('telnet://localhost', do_something)

quickstart() 函数要求用户输入用户名和密码（如果这不是您想要的，请使用 start()）。登录失败（和其他错误）会自动处理。您可能还想查看 Exscript.util.start。

You could also try Exscript:

from Exscript.util.start import quickstart

def do_something(conn):
    conn.autoinit()
    conn.execute('show version')

quickstart('telnet://localhost', do_something)

The quickstart() function asks the user for username and password (use start() if that is not what you want). Login failure (and other errors) are handeled automatically. You may also want to look at Exscript.util.start.

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