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python/tests: add auth_pad test for the dcerpc raw_protocol test

Browse Source 
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11982

Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>

Autobuild-User(master): Stefan Metzmacher <metze@samba.org>
Autobuild-Date(master): Fri Jun 24 18:08:44 CEST 2016 on sn-devel-144
This commit is contained in:
Stefan Metzmacher 2016-06-23 12:06:40 +02:00
parent 7d8edcc241
commit c49f9abb19
1 changed files with 548 additions and 0 deletions
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548
python/samba/tests/dcerpc/raw_protocol.py
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@ -2616,6 +2616,554 @@ class TestDCERPC_BIND(RawDCERPCTest):
self.assertIsNone(rep)
self.assertNotConnected()
def test_spnego_auth_pad_ok(self):
ndr32 = base.transfer_syntax_ndr()
tsf1_list = [ndr32]
ctx1 = dcerpc.ctx_list()
ctx1.context_id = 1
ctx1.num_transfer_syntaxes = len(tsf1_list)
ctx1.abstract_syntax = samba.dcerpc.mgmt.abstract_syntax()
ctx1.transfer_syntaxes = tsf1_list
ctx_list = [ctx1]
c = Credentials()
c.set_anonymous()
g = gensec.Security.start_client(self.settings)
g.set_credentials(c)
g.want_feature(gensec.FEATURE_DCE_STYLE)
auth_type = dcerpc.DCERPC_AUTH_TYPE_SPNEGO
auth_level = dcerpc.DCERPC_AUTH_LEVEL_CONNECT
auth_context_id = 2
g.start_mech_by_authtype(auth_type, auth_level)
from_server = ""
(finished, to_server) = g.update(from_server)
self.assertFalse(finished)
auth_info = self.generate_auth(auth_type=auth_type,
auth_level=auth_level,
auth_context_id=auth_context_id,
auth_blob=to_server)
req = self.generate_bind(call_id=0,
ctx_list=ctx_list,
auth_info=auth_info)
req_pdu = samba.ndr.ndr_pack(req)
auth_pad_ok = len(req_pdu)
auth_pad_ok -= dcerpc.DCERPC_REQUEST_LENGTH
auth_pad_ok -= dcerpc.DCERPC_AUTH_TRAILER_LENGTH
auth_pad_ok -= len(to_server)
auth_info = self.generate_auth(auth_type=auth_type,
auth_level=auth_level,
auth_context_id=auth_context_id,
auth_pad_length=auth_pad_ok,
auth_blob=to_server)
req = self.generate_bind(call_id=0,
ctx_list=ctx_list,
auth_info=auth_info)
self.send_pdu(req)
rep = self.recv_pdu()
self.verify_pdu(rep, dcerpc.DCERPC_PKT_BIND_ACK, req.call_id)
self.assertEquals(rep.u.max_xmit_frag, req.u.max_xmit_frag)
self.assertEquals(rep.u.max_recv_frag, req.u.max_recv_frag)
self.assertNotEquals(rep.u.assoc_group_id, req.u.assoc_group_id)
self.assertEquals(rep.u.secondary_address_size, 4)
self.assertEquals(rep.u.secondary_address, "%d" % self.tcp_port)
self.assertEquals(len(rep.u._pad1), 2)
#self.assertEquals(rep.u._pad1, '\0' * 2)
self.assertEquals(rep.u.num_results, 1)
self.assertEquals(rep.u.ctx_list[0].result,
dcerpc.DCERPC_BIND_ACK_RESULT_ACCEPTANCE)
self.assertEquals(rep.u.ctx_list[0].reason,
dcerpc.DCERPC_BIND_ACK_REASON_NOT_SPECIFIED)
self.assertNDRSyntaxEquals(rep.u.ctx_list[0].syntax, ndr32)
self.assertNotEquals(len(rep.u.auth_info), 0)
a = self.parse_auth(rep.u.auth_info)
from_server = a.credentials
(finished, to_server) = g.update(from_server)
self.assertFalse(finished)
auth_info = self.generate_auth(auth_type=auth_type,
auth_level=auth_level,
auth_context_id=auth_context_id,
auth_blob=to_server)
req = self.generate_alter(call_id=0,
ctx_list=ctx_list,
assoc_group_id=rep.u.assoc_group_id,
auth_info=auth_info)
req_pdu = samba.ndr.ndr_pack(req)
auth_pad_ok = len(req_pdu)
auth_pad_ok -= dcerpc.DCERPC_REQUEST_LENGTH
auth_pad_ok -= dcerpc.DCERPC_AUTH_TRAILER_LENGTH
auth_pad_ok -= len(to_server)
auth_info = self.generate_auth(auth_type=auth_type,
auth_level=auth_level,
auth_context_id=auth_context_id,
auth_pad_length=auth_pad_ok,
auth_blob=to_server)
req = self.generate_alter(call_id=0,
ctx_list=ctx_list,
assoc_group_id=rep.u.assoc_group_id,
auth_info=auth_info)
self.send_pdu(req)
rep = self.recv_pdu()
self.verify_pdu(rep, dcerpc.DCERPC_PKT_ALTER_RESP, req.call_id)
self.assertEquals(rep.u.max_xmit_frag, req.u.max_xmit_frag)
self.assertEquals(rep.u.max_recv_frag, req.u.max_recv_frag)
self.assertEquals(rep.u.assoc_group_id, req.u.assoc_group_id)
self.assertEquals(rep.u.secondary_address_size, 0)
self.assertEquals(len(rep.u._pad1), 2)
# Windows sends garbage
#self.assertEquals(rep.u._pad1, '\0' * 2)
self.assertEquals(rep.u.num_results, 1)
self.assertEquals(rep.u.ctx_list[0].result,
dcerpc.DCERPC_BIND_ACK_RESULT_ACCEPTANCE)
self.assertEquals(rep.u.ctx_list[0].reason,
dcerpc.DCERPC_BIND_ACK_REASON_NOT_SPECIFIED)
self.assertNDRSyntaxEquals(rep.u.ctx_list[0].syntax, ndr32)
self.assertNotEquals(len(rep.u.auth_info), 0)
a = self.parse_auth(rep.u.auth_info)
from_server = a.credentials
(finished, to_server) = g.update(from_server)
self.assertTrue(finished)
# And now try a request without auth_info
req = self.generate_request(call_id = 2,
context_id=ctx1.context_id,
opnum=0,
stub="")
self.send_pdu(req)
rep = self.recv_pdu()
self.verify_pdu(rep, dcerpc.DCERPC_PKT_RESPONSE, req.call_id,
auth_length=0)
self.assertNotEquals(rep.u.alloc_hint, 0)
self.assertEquals(rep.u.context_id, req.u.context_id)
self.assertEquals(rep.u.cancel_count, 0)
self.assertGreaterEqual(len(rep.u.stub_and_verifier), rep.u.alloc_hint)
# Now a request with auth_info DCERPC_AUTH_LEVEL_CONNECT
auth_info = self.generate_auth(auth_type=auth_type,
auth_level=auth_level,
auth_context_id=auth_context_id,
auth_blob="\x01"+"\x00"*15)
req = self.generate_request(call_id = 3,
context_id=ctx1.context_id,
opnum=0,
stub="",
auth_info=auth_info)
self.send_pdu(req)
rep = self.recv_pdu()
# We don't get an auth_info back
self.verify_pdu(rep, dcerpc.DCERPC_PKT_RESPONSE, req.call_id,
auth_length=0)
self.assertNotEquals(rep.u.alloc_hint, 0)
self.assertEquals(rep.u.context_id, req.u.context_id)
self.assertEquals(rep.u.cancel_count, 0)
self.assertGreaterEqual(len(rep.u.stub_and_verifier), rep.u.alloc_hint)
self._disconnect("disconnect")
self.assertNotConnected()
def test_spnego_auth_pad_fail_bind(self):
ndr32 = base.transfer_syntax_ndr()
tsf1_list = [ndr32]
ctx1 = dcerpc.ctx_list()
ctx1.context_id = 1
ctx1.num_transfer_syntaxes = len(tsf1_list)
ctx1.abstract_syntax = samba.dcerpc.mgmt.abstract_syntax()
ctx1.transfer_syntaxes = tsf1_list
ctx_list = [ctx1]
c = Credentials()
c.set_anonymous()
g = gensec.Security.start_client(self.settings)
g.set_credentials(c)
g.want_feature(gensec.FEATURE_DCE_STYLE)
auth_type = dcerpc.DCERPC_AUTH_TYPE_SPNEGO
auth_level = dcerpc.DCERPC_AUTH_LEVEL_CONNECT
auth_context_id = 2
g.start_mech_by_authtype(auth_type, auth_level)
from_server = ""
(finished, to_server) = g.update(from_server)
self.assertFalse(finished)
auth_info = self.generate_auth(auth_type=auth_type,
auth_level=auth_level,
auth_context_id=auth_context_id,
auth_blob=to_server)
req = self.generate_bind(call_id=0,
ctx_list=ctx_list,
auth_info=auth_info)
req_pdu = samba.ndr.ndr_pack(req)
auth_pad_ok = len(req_pdu)
auth_pad_ok -= dcerpc.DCERPC_REQUEST_LENGTH
auth_pad_ok -= dcerpc.DCERPC_AUTH_TRAILER_LENGTH
auth_pad_ok -= len(to_server)
auth_pad_bad = auth_pad_ok + 1
auth_info = self.generate_auth(auth_type=auth_type,
auth_level=auth_level,
auth_context_id=auth_context_id,
auth_pad_length=auth_pad_bad,
auth_blob=to_server)
req = self.generate_bind(call_id=0,
ctx_list=ctx_list,
auth_info=auth_info)
self.send_pdu(req)
rep = self.recv_pdu()
self.verify_pdu(rep, dcerpc.DCERPC_PKT_BIND_NAK, req.call_id,
auth_length=0)
self.assertEquals(rep.u.reject_reason,
dcerpc.DCERPC_BIND_NAK_REASON_PROTOCOL_VERSION_NOT_SUPPORTED)
self.assertEquals(rep.u.num_versions, 1)
self.assertEquals(rep.u.versions[0].rpc_vers, req.rpc_vers)
self.assertEquals(rep.u.versions[0].rpc_vers_minor, req.rpc_vers_minor)
self.assertEquals(len(rep.u._pad), 3)
self.assertEquals(rep.u._pad, '\0' * 3)
# wait for a disconnect
rep = self.recv_pdu()
self.assertIsNone(rep)
self.assertNotConnected()
def test_spnego_auth_pad_fail_alter(self):
ndr32 = base.transfer_syntax_ndr()
tsf1_list = [ndr32]
ctx1 = dcerpc.ctx_list()
ctx1.context_id = 1
ctx1.num_transfer_syntaxes = len(tsf1_list)
ctx1.abstract_syntax = samba.dcerpc.mgmt.abstract_syntax()
ctx1.transfer_syntaxes = tsf1_list
ctx_list = [ctx1]
c = Credentials()
c.set_anonymous()
g = gensec.Security.start_client(self.settings)
g.set_credentials(c)
g.want_feature(gensec.FEATURE_DCE_STYLE)
auth_type = dcerpc.DCERPC_AUTH_TYPE_SPNEGO
auth_level = dcerpc.DCERPC_AUTH_LEVEL_CONNECT
auth_context_id = 2
g.start_mech_by_authtype(auth_type, auth_level)
from_server = ""
(finished, to_server) = g.update(from_server)
self.assertFalse(finished)
auth_info = self.generate_auth(auth_type=auth_type,
auth_level=auth_level,
auth_context_id=auth_context_id,
auth_blob=to_server)
req = self.generate_bind(call_id=0,
ctx_list=ctx_list,
auth_info=auth_info)
req_pdu = samba.ndr.ndr_pack(req)
auth_pad_ok = len(req_pdu)
auth_pad_ok -= dcerpc.DCERPC_REQUEST_LENGTH
auth_pad_ok -= dcerpc.DCERPC_AUTH_TRAILER_LENGTH
auth_pad_ok -= len(to_server)
auth_info = self.generate_auth(auth_type=auth_type,
auth_level=auth_level,
auth_context_id=auth_context_id,
auth_pad_length=auth_pad_ok,
auth_blob=to_server)
req = self.generate_bind(call_id=0,
ctx_list=ctx_list,
auth_info=auth_info)
self.send_pdu(req)
rep = self.recv_pdu()
self.verify_pdu(rep, dcerpc.DCERPC_PKT_BIND_ACK, req.call_id)
self.assertEquals(rep.u.max_xmit_frag, req.u.max_xmit_frag)
self.assertEquals(rep.u.max_recv_frag, req.u.max_recv_frag)
self.assertNotEquals(rep.u.assoc_group_id, req.u.assoc_group_id)
self.assertEquals(rep.u.secondary_address_size, 4)
self.assertEquals(rep.u.secondary_address, "%d" % self.tcp_port)
self.assertEquals(len(rep.u._pad1), 2)
#self.assertEquals(rep.u._pad1, '\0' * 2)
self.assertEquals(rep.u.num_results, 1)
self.assertEquals(rep.u.ctx_list[0].result,
dcerpc.DCERPC_BIND_ACK_RESULT_ACCEPTANCE)
self.assertEquals(rep.u.ctx_list[0].reason,
dcerpc.DCERPC_BIND_ACK_REASON_NOT_SPECIFIED)
self.assertNDRSyntaxEquals(rep.u.ctx_list[0].syntax, ndr32)
self.assertNotEquals(len(rep.u.auth_info), 0)
a = self.parse_auth(rep.u.auth_info)
from_server = a.credentials
(finished, to_server) = g.update(from_server)
self.assertFalse(finished)
auth_info = self.generate_auth(auth_type=auth_type,
auth_level=auth_level,
auth_context_id=auth_context_id,
auth_blob=to_server)
req = self.generate_alter(call_id=0,
ctx_list=ctx_list,
assoc_group_id=rep.u.assoc_group_id,
auth_info=auth_info)
req_pdu = samba.ndr.ndr_pack(req)
auth_pad_ok = len(req_pdu)
auth_pad_ok -= dcerpc.DCERPC_REQUEST_LENGTH
auth_pad_ok -= dcerpc.DCERPC_AUTH_TRAILER_LENGTH
auth_pad_ok -= len(to_server)
auth_pad_bad = auth_pad_ok + 1
auth_info = self.generate_auth(auth_type=auth_type,
auth_level=auth_level,
auth_context_id=auth_context_id,
auth_pad_length=auth_pad_bad,
auth_blob=to_server)
req = self.generate_alter(call_id=0,
ctx_list=ctx_list,
assoc_group_id=rep.u.assoc_group_id,
auth_info=auth_info)
self.send_pdu(req)
rep = self.recv_pdu()
self.verify_pdu(rep, dcerpc.DCERPC_PKT_FAULT, req.call_id,
pfc_flags=req.pfc_flags |
dcerpc.DCERPC_PFC_FLAG_DID_NOT_EXECUTE,
auth_length=0)
self.assertNotEquals(rep.u.alloc_hint, 0)
self.assertEquals(rep.u.context_id, 0)
self.assertEquals(rep.u.cancel_count, 0)
self.assertEquals(rep.u.status, dcerpc.DCERPC_NCA_S_PROTO_ERROR)
self.assertEquals(len(rep.u._pad), 4)
self.assertEquals(rep.u._pad, '\0' * 4)
# wait for a disconnect
rep = self.recv_pdu()
self.assertIsNone(rep)
self.assertNotConnected()
def test_ntlmssp_auth_pad_ok(self):
ndr32 = base.transfer_syntax_ndr()
tsf1_list = [ndr32]
ctx1 = dcerpc.ctx_list()
ctx1.context_id = 1
ctx1.num_transfer_syntaxes = len(tsf1_list)
ctx1.abstract_syntax = samba.dcerpc.mgmt.abstract_syntax()
ctx1.transfer_syntaxes = tsf1_list
ctx_list = [ctx1]
c = Credentials()
c.set_anonymous()
g = gensec.Security.start_client(self.settings)
g.set_credentials(c)
g.want_feature(gensec.FEATURE_DCE_STYLE)
auth_type = dcerpc.DCERPC_AUTH_TYPE_NTLMSSP
auth_level = dcerpc.DCERPC_AUTH_LEVEL_CONNECT
auth_context_id = 2
g.start_mech_by_authtype(auth_type, auth_level)
from_server = ""
(finished, to_server) = g.update(from_server)
self.assertFalse(finished)
auth_info = self.generate_auth(auth_type=auth_type,
auth_level=auth_level,
auth_context_id=auth_context_id,
auth_blob=to_server)
req = self.generate_bind(call_id=0,
ctx_list=ctx_list,
auth_info=auth_info)
req_pdu = samba.ndr.ndr_pack(req)
auth_pad_ok = len(req_pdu)
auth_pad_ok -= dcerpc.DCERPC_REQUEST_LENGTH
auth_pad_ok -= dcerpc.DCERPC_AUTH_TRAILER_LENGTH
auth_pad_ok -= len(to_server)
auth_info = self.generate_auth(auth_type=auth_type,
auth_level=auth_level,
auth_context_id=auth_context_id,
auth_pad_length=auth_pad_ok,
auth_blob=to_server)
req = self.generate_bind(call_id=0,
ctx_list=ctx_list,
auth_info=auth_info)
self.send_pdu(req)
rep = self.recv_pdu()
self.verify_pdu(rep, dcerpc.DCERPC_PKT_BIND_ACK, req.call_id)
self.assertEquals(rep.u.max_xmit_frag, req.u.max_xmit_frag)
self.assertEquals(rep.u.max_recv_frag, req.u.max_recv_frag)
self.assertNotEquals(rep.u.assoc_group_id, req.u.assoc_group_id)
self.assertEquals(rep.u.secondary_address_size, 4)
self.assertEquals(rep.u.secondary_address, "%d" % self.tcp_port)
self.assertEquals(len(rep.u._pad1), 2)
#self.assertEquals(rep.u._pad1, '\0' * 2)
self.assertEquals(rep.u.num_results, 1)
self.assertEquals(rep.u.ctx_list[0].result,
dcerpc.DCERPC_BIND_ACK_RESULT_ACCEPTANCE)
self.assertEquals(rep.u.ctx_list[0].reason,
dcerpc.DCERPC_BIND_ACK_REASON_NOT_SPECIFIED)
self.assertNDRSyntaxEquals(rep.u.ctx_list[0].syntax, ndr32)
self.assertNotEquals(len(rep.u.auth_info), 0)
a = self.parse_auth(rep.u.auth_info)
from_server = a.credentials
(finished, to_server) = g.update(from_server)
self.assertTrue(finished)
auth_pad_ok = 0
auth_info = self.generate_auth(auth_type=auth_type,
auth_level=auth_level,
auth_context_id=auth_context_id,
auth_pad_length=auth_pad_ok,
auth_blob=to_server)
req = self.generate_auth3(call_id=0,
auth_info=auth_info)
self.send_pdu(req)
self.assertIsConnected()
# And now try a request without auth_info
req = self.generate_request(call_id = 2,
context_id=ctx1.context_id,
opnum=0,
stub="")
self.send_pdu(req)
rep = self.recv_pdu()
self.verify_pdu(rep, dcerpc.DCERPC_PKT_RESPONSE, req.call_id,
auth_length=0)
self.assertNotEquals(rep.u.alloc_hint, 0)
self.assertEquals(rep.u.context_id, req.u.context_id)
self.assertEquals(rep.u.cancel_count, 0)
self.assertGreaterEqual(len(rep.u.stub_and_verifier), rep.u.alloc_hint)
# Now a request with auth_info DCERPC_AUTH_LEVEL_CONNECT
auth_info = self.generate_auth(auth_type=auth_type,
auth_level=auth_level,
auth_context_id=auth_context_id,
auth_blob="\x01"+"\x00"*15)
req = self.generate_request(call_id = 3,
context_id=ctx1.context_id,
opnum=0,
stub="",
auth_info=auth_info)
self.send_pdu(req)
rep = self.recv_pdu()
# We don't get an auth_info back
self.verify_pdu(rep, dcerpc.DCERPC_PKT_RESPONSE, req.call_id,
auth_length=0)
self.assertNotEquals(rep.u.alloc_hint, 0)
self.assertEquals(rep.u.context_id, req.u.context_id)
self.assertEquals(rep.u.cancel_count, 0)
self.assertGreaterEqual(len(rep.u.stub_and_verifier), rep.u.alloc_hint)
self._disconnect("disconnect")
self.assertNotConnected()
def test_ntlmssp_auth_pad_fail_auth3(self):
ndr32 = base.transfer_syntax_ndr()
tsf1_list = [ndr32]
ctx1 = dcerpc.ctx_list()
ctx1.context_id = 1
ctx1.num_transfer_syntaxes = len(tsf1_list)
ctx1.abstract_syntax = samba.dcerpc.mgmt.abstract_syntax()
ctx1.transfer_syntaxes = tsf1_list
ctx_list = [ctx1]
c = Credentials()
c.set_anonymous()
g = gensec.Security.start_client(self.settings)
g.set_credentials(c)
g.want_feature(gensec.FEATURE_DCE_STYLE)
auth_type = dcerpc.DCERPC_AUTH_TYPE_NTLMSSP
auth_level = dcerpc.DCERPC_AUTH_LEVEL_CONNECT
auth_context_id = 2
g.start_mech_by_authtype(auth_type, auth_level)
from_server = ""
(finished, to_server) = g.update(from_server)
self.assertFalse(finished)
auth_info = self.generate_auth(auth_type=auth_type,
auth_level=auth_level,
auth_context_id=auth_context_id,
auth_blob=to_server)
req = self.generate_bind(call_id=0,
ctx_list=ctx_list,
auth_info=auth_info)
req_pdu = samba.ndr.ndr_pack(req)
auth_pad_ok = len(req_pdu)
auth_pad_ok -= dcerpc.DCERPC_REQUEST_LENGTH
auth_pad_ok -= dcerpc.DCERPC_AUTH_TRAILER_LENGTH
auth_pad_ok -= len(to_server)
auth_info = self.generate_auth(auth_type=auth_type,
auth_level=auth_level,
auth_context_id=auth_context_id,
auth_pad_length=auth_pad_ok,
auth_blob=to_server)
req = self.generate_bind(call_id=0,
ctx_list=ctx_list,
auth_info=auth_info)
self.send_pdu(req)
rep = self.recv_pdu()
self.verify_pdu(rep, dcerpc.DCERPC_PKT_BIND_ACK, req.call_id)
self.assertEquals(rep.u.max_xmit_frag, req.u.max_xmit_frag)
self.assertEquals(rep.u.max_recv_frag, req.u.max_recv_frag)
self.assertNotEquals(rep.u.assoc_group_id, req.u.assoc_group_id)
self.assertEquals(rep.u.secondary_address_size, 4)
self.assertEquals(rep.u.secondary_address, "%d" % self.tcp_port)
self.assertEquals(len(rep.u._pad1), 2)
#self.assertEquals(rep.u._pad1, '\0' * 2)
self.assertEquals(rep.u.num_results, 1)
self.assertEquals(rep.u.ctx_list[0].result,
dcerpc.DCERPC_BIND_ACK_RESULT_ACCEPTANCE)
self.assertEquals(rep.u.ctx_list[0].reason,
dcerpc.DCERPC_BIND_ACK_REASON_NOT_SPECIFIED)
self.assertNDRSyntaxEquals(rep.u.ctx_list[0].syntax, ndr32)
self.assertNotEquals(len(rep.u.auth_info), 0)
a = self.parse_auth(rep.u.auth_info)
from_server = a.credentials
(finished, to_server) = g.update(from_server)
self.assertTrue(finished)
auth_pad_bad = 1
auth_info = self.generate_auth(auth_type=auth_type,
auth_level=auth_level,
auth_context_id=auth_context_id,
auth_pad_length=auth_pad_bad,
auth_blob=to_server)
req = self.generate_auth3(call_id=0,
auth_info=auth_info)
self.send_pdu(req)
rep = self.recv_pdu()
self.verify_pdu(rep, dcerpc.DCERPC_PKT_FAULT, req.call_id,
pfc_flags=req.pfc_flags |
dcerpc.DCERPC_PFC_FLAG_DID_NOT_EXECUTE,
auth_length=0)
self.assertNotEquals(rep.u.alloc_hint, 0)
self.assertEquals(rep.u.context_id, 0)
self.assertEquals(rep.u.cancel_count, 0)
self.assertEquals(rep.u.status, dcerpc.DCERPC_NCA_S_FAULT_REMOTE_NO_MEMORY)
self.assertEquals(len(rep.u._pad), 4)
self.assertEquals(rep.u._pad, '\0' * 4)
# wait for a disconnect
rep = self.recv_pdu()
self.assertIsNone(rep)
self.assertNotConnected()
if __name__ == "__main__":
global_ndr_print = True
global_hexdump = True