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Batuhan Berk Başoğlu 2020-11-12 11:05:57 -05:00
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venv/Lib/site-packages/win32/Demos/security/sspi/simple_auth.py Normal file
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# A demo of basic SSPI authentication.
# There is a 'client' context and a 'server' context - typically these will
# be on different machines (here they are in the same process, but the same
# concepts apply)
import sspi
import win32security, sspicon, win32api
def lookup_ret_code(err):
for k,v in list(sspicon.__dict__.items()):
if k[0:6] in ('SEC_I_','SEC_E_') and v==err:
return k
"""
pkg_name='Kerberos'
sspiclient=SSPIClient(pkg_name, win32api.GetUserName(), ## target spn is ourself
None, None, ## use none for client name and authentication information for current context
## u'username', (u'username',u'domain.com',u'passwd'),
sspicon.ISC_REQ_INTEGRITY|sspicon.ISC_REQ_SEQUENCE_DETECT|sspicon.ISC_REQ_REPLAY_DETECT| \
sspicon.ISC_REQ_DELEGATE|sspicon.ISC_REQ_CONFIDENTIALITY|sspicon.ISC_REQ_USE_SESSION_KEY)
sspiserver=SSPIServer(pkg_name, None,
sspicon.ASC_REQ_INTEGRITY|sspicon.ASC_REQ_SEQUENCE_DETECT|sspicon.ASC_REQ_REPLAY_DETECT| \
sspicon.ASC_REQ_DELEGATE|sspicon.ASC_REQ_CONFIDENTIALITY|sspicon.ASC_REQ_STREAM|sspicon.ASC_REQ_USE_SESSION_KEY)
"""
pkg_name='NTLM'
# Setup the 2 contexts.
sspiclient=sspi.ClientAuth(pkg_name)
sspiserver=sspi.ServerAuth(pkg_name)
# Perform the authentication dance, each loop exchanging more information
# on the way to completing authentication.
sec_buffer=None
while 1:
err, sec_buffer = sspiclient.authorize(sec_buffer)
err, sec_buffer = sspiserver.authorize(sec_buffer)
if err==0:
break
# The server can now impersonate the client. In this demo the 2 users will
# always be the same.
sspiserver.ctxt.ImpersonateSecurityContext()
print('Impersonated user: ',win32api.GetUserNameEx(win32api.NameSamCompatible))
sspiserver.ctxt.RevertSecurityContext()
print('Reverted to self: ',win32api.GetUserName())
pkg_size_info=sspiclient.ctxt.QueryContextAttributes(sspicon.SECPKG_ATTR_SIZES)
# Now sign some data
msg='some data to be encrypted ......'
sigsize=pkg_size_info['MaxSignature']
sigbuf=win32security.PySecBufferDescType()
sigbuf.append(win32security.PySecBufferType(len(msg), sspicon.SECBUFFER_DATA))
sigbuf.append(win32security.PySecBufferType(sigsize, sspicon.SECBUFFER_TOKEN))
sigbuf[0].Buffer=msg
sspiclient.ctxt.MakeSignature(0,sigbuf,1)
sspiserver.ctxt.VerifySignature(sigbuf,1)
# And finally encrypt some.
trailersize=pkg_size_info['SecurityTrailer']
encbuf=win32security.PySecBufferDescType()
encbuf.append(win32security.PySecBufferType(len(msg), sspicon.SECBUFFER_DATA))
encbuf.append(win32security.PySecBufferType(trailersize, sspicon.SECBUFFER_TOKEN))
encbuf[0].Buffer=msg
sspiclient.ctxt.EncryptMessage(0,encbuf,1)
print('Encrypted data:',repr(encbuf[0].Buffer))
sspiserver.ctxt.DecryptMessage(encbuf,1)
print('Unencrypted data:',encbuf[0].Buffer)