Estoy tratando de ejecutar el código en elInteractuando con SSH a través de Pexpect yBruto forzando contraseñas SSH con Pxssh secciones del capítulo 2 dePitón violento. Usando amboschild.expect() ypxssh Recibo errores de EOF similares.

Ejecutando estos comandos desde la consola de Python:

import pexpect
connStr = "ssh [email protected]"
child = pexpect.spawn(connStr)
ret = child.expect([pexpect.TIMEOUT, ssh_newkey, "[P|p]assword:"])

Obtengo esta salida:

Traceback (most recent call last):
  File "<input>", line 1, in <module>
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/pexpect.py", li
ne 1316, in expect
    return self.expect_list(compiled_pattern_list, timeout, searchwindowsize)
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/pexpect.py", li
ne 1330, in expect_list
    return self.expect_loop(searcher_re(pattern_list), timeout, searchwindowsize)
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/pexpect.py", li
ne 1401, in expect_loop
    raise EOF (str(e) + '\n' + str(self))
EOF: End Of File (EOF) in read_nonblocking(). Empty string style platform.
<pexpect.spawn object at 0x10180c550>
version: 2.4 ($Revision: 516 $)
command: /usr/bin/ssh
args: ['/usr/bin/ssh', '[email protected]']
searcher: searcher_re:
    0: TIMEOUT
    1: re.compile("Are you sure you want to continue connecting")
    2: re.compile("[P|p]assword:")
buffer (last 100 chars): 
before (last 100 chars): 
after: <class 'pexpect.EOF'>
match: None
match_index: None
exitstatus: 255 
flag_eof: True
pid: 12122
child_fd: 4
closed: False
timeout: 30
delimiter: <class 'pexpect.EOF'>
logfile: None
logfile_read: None
logfile_send: None
maxread: 2000
ignorecase: False
searchwindowsize: None
delaybeforesend: 0.05
delayafterclose: 0.1
delayafterterminate: 0.1

Y ejecutando estos comandos, usandopxssh:

import pxssh
s = pxssh.pxssh()
s.login("127.0.0.1", "root", "1234")

Obtengo esta salida:

Traceback (most recent call last):
  File "<input>", line 1, in <module>
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/pxssh.py", line
 196, in login
    i = self.expect(["(?i)are you sure you want to continue connecting", original_prompt, "(?i)(?:pas
sword)|(?:passphrase for key)", "(?i)permission denied", "(?i)terminal type", TIMEOUT, "(?i)connectio
n closed by remote host"], timeout=login_timeout)
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/pexpect.py", li
ne 1316, in expect
    return self.expect_list(compiled_pattern_list, timeout, searchwindowsize)
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/pexpect.py", li
ne 1330, in expect_list
    return self.expect_loop(searcher_re(pattern_list), timeout, searchwindowsize)
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/pexpect.py", li
ne 1401, in expect_loop
    raise EOF (str(e) + '\n' + str(self))
EOF: End Of File (EOF) in read_nonblocking(). Empty string style platform.
<pxssh.pxssh object at 0x1016bff90>
version: 2.4 ($Revision: 516 $)
command: /usr/bin/ssh
args: ['/usr/bin/ssh', '-q', '-l', 'root', '127.0.0.1']
searcher: searcher_re:
    0: re.compile("(?i)are you sure you want to continue connecting")
    1: re.compile("[#$]")
    2: re.compile("(?i)(?:password)|(?:passphrase for key)")
    3: re.compile("(?i)permission denied")
    4: re.compile("(?i)terminal type")
    5: TIMEOUT
    6: re.compile("(?i)connection closed by remote host")
buffer (last 100 chars): 
before (last 100 chars): 
after: <class 'pexpect.EOF'>
match: None
match_index: None
exitstatus: None
flag_eof: True
pid: 12136
child_fd: 3
closed: False
timeout: 30
delimiter: <class 'pexpect.EOF'>
logfile: None
logfile_read: None
logfile_send: None
maxread: 2000
ignorecase: False
searchwindowsize: None
delaybeforesend: 0.05
delayafterclose: 0.1
delayafterterminate: 0.1

Obtengo resultados similares cuando sustituyo127.0.0.1 con otros hosts y probar diferentes combinaciones de nombre de usuario / contraseña.

lospexpect documentación sugiere usarexpect(pexpect.EOF) para evitar generar la excepción EOF. De hecho, cuando hago lo siguiente:

connStr = "ssh [email protected]"
child = pexpect.spawn(connStr)
print child.expect(pexpect.EOF)

El resultado es0.

Pero las siguientes preguntas permanecen:

Estoy confundido por la sintaxis del libro:child.expect([pexpect.TIMEOUT, ssh_newkey, "[P|p]assword:"]). ¿Por qué estamos pasando una lista aexpect()? ¿Qué se supone que contiene esta lista?¿Cómo hago uso deexpect(pexpect.EOF), como indica la documentación, cuando se usa pxssh?¿Por qué el código en el libro no funciona correctamente? ¿Ha cambiado algo en la biblioteca de pexpect desde la publicación del libro? ¿Es porque estoy en OS X?

Tengo Python 2.7 y pexpect 2.4 ejecutándose en Mac OS X 10.8.4.