501 lines
24 KiB
Python
501 lines
24 KiB
Python
"""Contains client side logic of WinRM SOAP protocol implementation"""
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from __future__ import unicode_literals
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import base64
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import uuid
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import xml.etree.ElementTree as ET
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import xmltodict
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text_type = str
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from winrm.transport import Transport
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from winrm.exceptions import WinRMError, WinRMTransportError, WinRMOperationTimeoutError
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xmlns = {
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'soapenv': 'http://www.w3.org/2003/05/soap-envelope',
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'soapaddr': 'http://schemas.xmlsoap.org/ws/2004/08/addressing',
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'wsmanfault': "http://schemas.microsoft.com/wbem/wsman/1/wsmanfault"
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}
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class Protocol(object):
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"""This is the main class that does the SOAP request/response logic. There
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are a few helper classes, but pretty much everything comes through here
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first.
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"""
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DEFAULT_READ_TIMEOUT_SEC = 30
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DEFAULT_OPERATION_TIMEOUT_SEC = 20
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DEFAULT_MAX_ENV_SIZE = 153600
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DEFAULT_LOCALE = 'en-US'
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def __init__(
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self, endpoint, transport='plaintext', username=None,
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password=None, realm=None, service="HTTP", keytab=None,
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ca_trust_path='legacy_requests', cert_pem=None, cert_key_pem=None,
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server_cert_validation='validate',
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kerberos_delegation=False,
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read_timeout_sec=DEFAULT_READ_TIMEOUT_SEC,
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operation_timeout_sec=DEFAULT_OPERATION_TIMEOUT_SEC,
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kerberos_hostname_override=None,
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message_encryption='auto',
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credssp_disable_tlsv1_2=False,
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send_cbt=True,
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proxy='legacy_requests',
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):
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"""
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@param string endpoint: the WinRM webservice endpoint
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@param string transport: transport type, one of 'plaintext' (default), 'kerberos', 'ssl', 'ntlm', 'credssp' # NOQA
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@param string username: username
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@param string password: password
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@param string realm: unused
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@param string service: the service name, default is HTTP
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@param string keytab: the path to a keytab file if you are using one
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@param string ca_trust_path: Certification Authority trust path. If server_cert_validation is set to 'validate':
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'legacy_requests'(default) to use environment variables,
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None to explicitly disallow any additional CA trust path
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Any other value will be considered the CA trust path to use.
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@param string cert_pem: client authentication certificate file path in PEM format # NOQA
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@param string cert_key_pem: client authentication certificate key file path in PEM format # NOQA
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@param string server_cert_validation: whether server certificate should be validated on Python versions that support it; one of 'validate' (default), 'ignore' #NOQA
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@param bool kerberos_delegation: if True, TGT is sent to target server to allow multiple hops # NOQA
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@param int read_timeout_sec: maximum seconds to wait before an HTTP connect/read times out (default 30). This value should be slightly higher than operation_timeout_sec, as the server can block *at least* that long. # NOQA
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@param int operation_timeout_sec: maximum allowed time in seconds for any single wsman HTTP operation (default 20). Note that operation timeouts while receiving output (the only wsman operation that should take any significant time, and where these timeouts are expected) will be silently retried indefinitely. # NOQA
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@param string kerberos_hostname_override: the hostname to use for the kerberos exchange (defaults to the hostname in the endpoint URL)
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@param bool message_encryption_enabled: Will encrypt the WinRM messages if set to True and the transport auth supports message encryption (Default True).
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@param string proxy: Specify a proxy for the WinRM connection to use. 'legacy_requests'(default) to use environment variables, None to disable proxies completely or the proxy URL itself.
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"""
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try:
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read_timeout_sec = int(read_timeout_sec)
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except ValueError as ve:
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raise ValueError("failed to parse read_timeout_sec as int: %s" % str(ve))
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try:
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operation_timeout_sec = int(operation_timeout_sec)
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except ValueError as ve:
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raise ValueError("failed to parse operation_timeout_sec as int: %s" % str(ve))
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if operation_timeout_sec >= read_timeout_sec or operation_timeout_sec < 1:
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raise WinRMError("read_timeout_sec must exceed operation_timeout_sec, and both must be non-zero")
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self.read_timeout_sec = read_timeout_sec
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self.operation_timeout_sec = operation_timeout_sec
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self.max_env_sz = Protocol.DEFAULT_MAX_ENV_SIZE
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self.locale = Protocol.DEFAULT_LOCALE
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self.transport = Transport(
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endpoint=endpoint, username=username, password=password,
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realm=realm, service=service, keytab=keytab,
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ca_trust_path=ca_trust_path, cert_pem=cert_pem,
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cert_key_pem=cert_key_pem, read_timeout_sec=self.read_timeout_sec,
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server_cert_validation=server_cert_validation,
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kerberos_delegation=kerberos_delegation,
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kerberos_hostname_override=kerberos_hostname_override,
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auth_method=transport,
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message_encryption=message_encryption,
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credssp_disable_tlsv1_2=credssp_disable_tlsv1_2,
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send_cbt=send_cbt,
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proxy=proxy,
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)
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self.username = username
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self.password = password
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self.service = service
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self.keytab = keytab
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self.ca_trust_path = ca_trust_path
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self.server_cert_validation = server_cert_validation
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self.kerberos_delegation = kerberos_delegation
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self.kerberos_hostname_override = kerberos_hostname_override
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self.credssp_disable_tlsv1_2 = credssp_disable_tlsv1_2
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def open_shell(self, i_stream='stdin', o_stream='stdout stderr',
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working_directory=None, env_vars=None, noprofile=False,
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codepage=437, lifetime=None, idle_timeout=None):
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"""
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Create a Shell on the destination host
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@param string i_stream: Which input stream to open. Leave this alone
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unless you know what you're doing (default: stdin)
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@param string o_stream: Which output stream to open. Leave this alone
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unless you know what you're doing (default: stdout stderr)
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@param string working_directory: the directory to create the shell in
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@param dict env_vars: environment variables to set for the shell. For
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instance: {'PATH': '%PATH%;c:/Program Files (x86)/Git/bin/', 'CYGWIN':
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'nontsec codepage:utf8'}
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@returns The ShellId from the SOAP response. This is our open shell
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instance on the remote machine.
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@rtype string
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"""
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req = {'env:Envelope': self._get_soap_header(
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resource_uri='http://schemas.microsoft.com/wbem/wsman/1/windows/shell/cmd', # NOQA
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action='http://schemas.xmlsoap.org/ws/2004/09/transfer/Create')}
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header = req['env:Envelope']['env:Header']
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header['w:OptionSet'] = {
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'w:Option': [
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{
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'@Name': 'WINRS_NOPROFILE',
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'#text': str(noprofile).upper() # TODO remove str call
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},
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{
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'@Name': 'WINRS_CODEPAGE',
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'#text': str(codepage) # TODO remove str call
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}
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]
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}
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shell = req['env:Envelope'].setdefault(
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'env:Body', {}).setdefault('rsp:Shell', {})
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shell['rsp:InputStreams'] = i_stream
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shell['rsp:OutputStreams'] = o_stream
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if working_directory:
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# TODO ensure that rsp:WorkingDirectory should be nested within rsp:Shell # NOQA
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shell['rsp:WorkingDirectory'] = working_directory
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# TODO check Lifetime param: http://msdn.microsoft.com/en-us/library/cc251546(v=PROT.13).aspx # NOQA
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# if lifetime:
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# shell['rsp:Lifetime'] = iso8601_duration.sec_to_dur(lifetime)
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# TODO make it so the input is given in milliseconds and converted to xs:duration # NOQA
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if idle_timeout:
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shell['rsp:IdleTimeOut'] = idle_timeout
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if env_vars:
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# the rsp:Variable tag needs to be list of variables so that all
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# environment variables in the env_vars dict are set on the shell
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env = shell.setdefault('rsp:Environment', {}).setdefault('rsp:Variable', [])
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for key, value in env_vars.items():
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env.append({'@Name': key, '#text': value})
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res = self.send_message(xmltodict.unparse(req))
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# res = xmltodict.parse(res)
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# return res['s:Envelope']['s:Body']['x:ResourceCreated']['a:ReferenceParameters']['w:SelectorSet']['w:Selector']['#text']
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root = ET.fromstring(res)
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return next(
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node for node in root.findall('.//*')
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if node.get('Name') == 'ShellId').text
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# Helper method for building SOAP Header
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def _get_soap_header(
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self, action=None, resource_uri=None, shell_id=None,
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message_id=None):
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if not message_id:
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message_id = uuid.uuid4()
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header = {
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'@xmlns:xsd': 'http://www.w3.org/2001/XMLSchema',
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'@xmlns:xsi': 'http://www.w3.org/2001/XMLSchema-instance',
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'@xmlns:env': xmlns['soapenv'],
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'@xmlns:a': xmlns['soapaddr'],
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'@xmlns:b': 'http://schemas.dmtf.org/wbem/wsman/1/cimbinding.xsd',
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'@xmlns:n': 'http://schemas.xmlsoap.org/ws/2004/09/enumeration',
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'@xmlns:x': 'http://schemas.xmlsoap.org/ws/2004/09/transfer',
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'@xmlns:w': 'http://schemas.dmtf.org/wbem/wsman/1/wsman.xsd',
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'@xmlns:p': 'http://schemas.microsoft.com/wbem/wsman/1/wsman.xsd',
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'@xmlns:rsp': 'http://schemas.microsoft.com/wbem/wsman/1/windows/shell', # NOQA
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'@xmlns:cfg': 'http://schemas.microsoft.com/wbem/wsman/1/config',
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'env:Header': {
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'a:To': 'http://windows-host:5985/wsman',
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'a:ReplyTo': {
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'a:Address': {
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'@mustUnderstand': 'true',
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'#text': 'http://schemas.xmlsoap.org/ws/2004/08/addressing/role/anonymous' # NOQA
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}
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},
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'w:MaxEnvelopeSize': {
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'@mustUnderstand': 'true',
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'#text': '153600'
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},
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'a:MessageID': 'uuid:{0}'.format(message_id),
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'w:Locale': {
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'@mustUnderstand': 'false',
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'@xml:lang': 'en-US'
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},
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'p:DataLocale': {
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'@mustUnderstand': 'false',
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'@xml:lang': 'en-US'
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},
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# TODO: research this a bit http://msdn.microsoft.com/en-us/library/cc251561(v=PROT.13).aspx # NOQA
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# 'cfg:MaxTimeoutms': 600
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# Operation timeout in ISO8601 format, see http://msdn.microsoft.com/en-us/library/ee916629(v=PROT.13).aspx # NOQA
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'w:OperationTimeout': 'PT{0}S'.format(int(self.operation_timeout_sec)),
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'w:ResourceURI': {
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'@mustUnderstand': 'true',
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'#text': resource_uri
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},
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'a:Action': {
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'@mustUnderstand': 'true',
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'#text': action
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}
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}
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}
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if shell_id:
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header['env:Header']['w:SelectorSet'] = {
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'w:Selector': {
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'@Name': 'ShellId',
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'#text': shell_id
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}
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}
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return header
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def send_message(self, message):
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# TODO add message_id vs relates_to checking
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# TODO port error handling code
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try:
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resp = self.transport.send_message(message)
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return resp
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except WinRMTransportError as ex:
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try:
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# if response is XML-parseable, it's probably a SOAP fault; extract the details
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root = ET.fromstring(ex.response_text)
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except Exception:
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# assume some other transport error; raise the original exception
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raise ex
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fault = root.find('soapenv:Body/soapenv:Fault', xmlns)
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if fault is not None:
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fault_data = dict(
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transport_message=ex.message,
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http_status_code=ex.code
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)
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wsmanfault_code = fault.find('soapenv:Detail/wsmanfault:WSManFault[@Code]', xmlns)
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if wsmanfault_code is not None:
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fault_data['wsmanfault_code'] = wsmanfault_code.get('Code')
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# convert receive timeout code to WinRMOperationTimeoutError
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if fault_data['wsmanfault_code'] == '2150858793':
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# TODO: this fault code is specific to the Receive operation; convert all op timeouts?
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raise WinRMOperationTimeoutError()
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fault_code = fault.find('soapenv:Code/soapenv:Value', xmlns)
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if fault_code is not None:
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fault_data['fault_code'] = fault_code.text
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fault_subcode = fault.find('soapenv:Code/soapenv:Subcode/soapenv:Value', xmlns)
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if fault_subcode is not None:
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fault_data['fault_subcode'] = fault_subcode.text
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error_message = fault.find('soapenv:Reason/soapenv:Text', xmlns)
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if error_message is not None:
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error_message = error_message.text
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else:
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error_message = "(no error message in fault)"
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raise WinRMError('{0} (extended fault data: {1})'.format(error_message, fault_data))
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def close_shell(self, shell_id, close_session=True):
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"""
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Close the shell
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@param string shell_id: The shell id on the remote machine.
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See #open_shell
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@param bool close_session: If we want to close the requests's session.
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Allows to completely close all TCP connections to the server.
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@returns This should have more error checking but it just returns true
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for now.
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@rtype bool
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"""
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try:
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message_id = uuid.uuid4()
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req = {'env:Envelope': self._get_soap_header(
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resource_uri='http://schemas.microsoft.com/wbem/wsman/1/windows/shell/cmd', # NOQA
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action='http://schemas.xmlsoap.org/ws/2004/09/transfer/Delete',
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shell_id=shell_id,
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message_id=message_id)}
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# SOAP message requires empty env:Body
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req['env:Envelope'].setdefault('env:Body', {})
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res = self.send_message(xmltodict.unparse(req))
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root = ET.fromstring(res)
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relates_to = next(
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node for node in root.findall('.//*')
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if node.tag.endswith('RelatesTo')).text
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finally:
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# Close the transport if we are done with the shell.
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# This will ensure no lingering TCP connections are thrown back into a requests' connection pool.
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if close_session:
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self.transport.close_session()
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# TODO change assert into user-friendly exception
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assert uuid.UUID(relates_to.replace('uuid:', '')) == message_id
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def run_command(
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self, shell_id, command, arguments=(), console_mode_stdin=True,
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skip_cmd_shell=False):
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"""
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Run a command on a machine with an open shell
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@param string shell_id: The shell id on the remote machine.
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See #open_shell
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@param string command: The command to run on the remote machine
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@param iterable of string arguments: An array of arguments for this
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command
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@param bool console_mode_stdin: (default: True)
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@param bool skip_cmd_shell: (default: False)
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@return: The CommandId from the SOAP response.
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This is the ID we need to query in order to get output.
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@rtype string
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"""
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req = {'env:Envelope': self._get_soap_header(
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resource_uri='http://schemas.microsoft.com/wbem/wsman/1/windows/shell/cmd', # NOQA
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action='http://schemas.microsoft.com/wbem/wsman/1/windows/shell/Command', # NOQA
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shell_id=shell_id)}
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header = req['env:Envelope']['env:Header']
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header['w:OptionSet'] = {
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'w:Option': [
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{
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'@Name': 'WINRS_CONSOLEMODE_STDIN',
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'#text': str(console_mode_stdin).upper()
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},
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{
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'@Name': 'WINRS_SKIP_CMD_SHELL',
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'#text': str(skip_cmd_shell).upper()
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}
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]
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}
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cmd_line = req['env:Envelope'].setdefault(
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'env:Body', {}).setdefault('rsp:CommandLine', {})
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cmd_line['rsp:Command'] = {'#text': command}
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if arguments:
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unicode_args = [a if isinstance(a, text_type) else a.decode('utf-8') for a in arguments]
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cmd_line['rsp:Arguments'] = u' '.join(unicode_args)
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res = self.send_message(xmltodict.unparse(req))
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root = ET.fromstring(res)
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command_id = next(
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node for node in root.findall('.//*')
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if node.tag.endswith('CommandId')).text
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return command_id
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def cleanup_command(self, shell_id, command_id):
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"""
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Clean-up after a command. @see #run_command
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@param string shell_id: The shell id on the remote machine.
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See #open_shell
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@param string command_id: The command id on the remote machine.
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See #run_command
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@returns: This should have more error checking but it just returns true
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for now.
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@rtype bool
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"""
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message_id = uuid.uuid4()
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req = {'env:Envelope': self._get_soap_header(
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resource_uri='http://schemas.microsoft.com/wbem/wsman/1/windows/shell/cmd', # NOQA
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action='http://schemas.microsoft.com/wbem/wsman/1/windows/shell/Signal', # NOQA
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shell_id=shell_id,
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message_id=message_id)}
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# Signal the Command references to terminate (close stdout/stderr)
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signal = req['env:Envelope'].setdefault(
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'env:Body', {}).setdefault('rsp:Signal', {})
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signal['@CommandId'] = command_id
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signal['rsp:Code'] = 'http://schemas.microsoft.com/wbem/wsman/1/windows/shell/signal/terminate' # NOQA
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res = self.send_message(xmltodict.unparse(req))
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root = ET.fromstring(res)
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relates_to = next(
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node for node in root.findall('.//*')
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if node.tag.endswith('RelatesTo')).text
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# TODO change assert into user-friendly exception
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assert uuid.UUID(relates_to.replace('uuid:', '')) == message_id
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def send_command_input(self, shell_id, command_id, stdin_input, end=False):
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"""
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Send input to the given shell and command.
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@param string shell_id: The shell id on the remote machine.
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See #open_shell
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@param string command_id: The command id on the remote machine.
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See #run_command
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@param string stdin_input: The input unicode string or byte string to be sent.
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@param bool end: Boolean value which will close the stdin stream. If end=True then the stdin pipe to the
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remotely running process will be closed causing the next read by the remote process to stdin to return a
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EndOfFile error; the behavior of each process when this error is encountered is defined by the process, but most
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processes ( like CMD and powershell for instance) will just exit. Setting this value to 'True' means that no
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more input will be able to be sent to the process and attempting to do so should result in an error.
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@return: None
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"""
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if isinstance(stdin_input, text_type):
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stdin_input = stdin_input.encode("437")
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req = {'env:Envelope': self._get_soap_header(
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resource_uri='http://schemas.microsoft.com/wbem/wsman/1/windows/shell/cmd', # NOQA
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action='http://schemas.microsoft.com/wbem/wsman/1/windows/shell/Send', # NOQA
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shell_id=shell_id)}
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stdin_envelope = req['env:Envelope'].setdefault('env:Body', {}).setdefault(
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'rsp:Send', {}).setdefault('rsp:Stream', {})
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|
stdin_envelope['@CommandId'] = command_id
|
|
stdin_envelope['@Name'] = 'stdin'
|
|
if end:
|
|
stdin_envelope['@End'] = "true"
|
|
else:
|
|
stdin_envelope['@End'] = "false"
|
|
stdin_envelope['@xmlns:rsp'] = 'http://schemas.microsoft.com/wbem/wsman/1/windows/shell'
|
|
stdin_envelope['#text'] = base64.b64encode(stdin_input)
|
|
self.send_message(xmltodict.unparse(req))
|
|
|
|
def get_command_output(self, shell_id, command_id):
|
|
"""
|
|
Get the Output of the given shell and command
|
|
@param string shell_id: The shell id on the remote machine.
|
|
See #open_shell
|
|
@param string command_id: The command id on the remote machine.
|
|
See #run_command
|
|
#@return [Hash] Returns a Hash with a key :exitcode and :data.
|
|
Data is an Array of Hashes where the corresponding key
|
|
# is either :stdout or :stderr. The reason it is in an Array so so
|
|
we can get the output in the order it occurs on
|
|
# the console.
|
|
"""
|
|
stdout_buffer, stderr_buffer = [], []
|
|
command_done = False
|
|
while not command_done:
|
|
try:
|
|
stdout, stderr, return_code, command_done = \
|
|
self._raw_get_command_output(shell_id, command_id)
|
|
stdout_buffer.append(stdout)
|
|
stderr_buffer.append(stderr)
|
|
except WinRMOperationTimeoutError:
|
|
# this is an expected error when waiting for a long-running process, just silently retry
|
|
pass
|
|
return b''.join(stdout_buffer), b''.join(stderr_buffer), return_code
|
|
|
|
def _raw_get_command_output(self, shell_id, command_id):
|
|
req = {'env:Envelope': self._get_soap_header(
|
|
resource_uri='http://schemas.microsoft.com/wbem/wsman/1/windows/shell/cmd', # NOQA
|
|
action='http://schemas.microsoft.com/wbem/wsman/1/windows/shell/Receive', # NOQA
|
|
shell_id=shell_id)}
|
|
|
|
stream = req['env:Envelope'].setdefault('env:Body', {}).setdefault(
|
|
'rsp:Receive', {}).setdefault('rsp:DesiredStream', {})
|
|
stream['@CommandId'] = command_id
|
|
stream['#text'] = 'stdout stderr'
|
|
|
|
res = self.send_message(xmltodict.unparse(req))
|
|
root = ET.fromstring(res)
|
|
stream_nodes = [
|
|
node for node in root.findall('.//*')
|
|
if node.tag.endswith('Stream')]
|
|
stdout = stderr = b''
|
|
return_code = -1
|
|
for stream_node in stream_nodes:
|
|
if not stream_node.text:
|
|
continue
|
|
if stream_node.attrib['Name'] == 'stdout':
|
|
stdout += base64.b64decode(stream_node.text.encode('ascii'))
|
|
elif stream_node.attrib['Name'] == 'stderr':
|
|
stderr += base64.b64decode(stream_node.text.encode('ascii'))
|
|
|
|
# We may need to get additional output if the stream has not finished.
|
|
# The CommandState will change from Running to Done like so:
|
|
# @example
|
|
# from...
|
|
# <rsp:CommandState CommandId="..." State="http://schemas.microsoft.com/wbem/wsman/1/windows/shell/CommandState/Running"/>
|
|
# to...
|
|
# <rsp:CommandState CommandId="..." State="http://schemas.microsoft.com/wbem/wsman/1/windows/shell/CommandState/Done">
|
|
# <rsp:ExitCode>0</rsp:ExitCode>
|
|
# </rsp:CommandState>
|
|
command_done = len([
|
|
node for node in root.findall('.//*')
|
|
if node.get('State', '').endswith('CommandState/Done')]) == 1
|
|
if command_done:
|
|
return_code = int(
|
|
next(node for node in root.findall('.//*')
|
|
if node.tag.endswith('ExitCode')).text)
|
|
|
|
return stdout, stderr, return_code, command_done
|