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Delete dcerpc.py
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Matteo ℱan
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dcerpc.py
363
dcerpc.py
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# Copyright (c) 2003-2012 CORE Security Technologies
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#
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# This software is provided under under a slightly modified version
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# of the Apache Software License. See the accompanying LICENSE file
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# for more information.
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#
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# $Id: dcerpc.py 917 2013-11-10 20:47:57Z bethus $
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#
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# Partial C706.pdf + [MS-RPCE] implementation
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#
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# ToDo:
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# [ ] Take out all the security provider stuff out of here (e.g. RPC_C_AUTHN_WINNT)
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# and put it elsewhere. This will make the coder cleaner and easier to add
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# more SSP (e.g. NETLOGON)
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#
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from structure import Structure,pack,unpack
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# MS/RPC Constants
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MSRPC_REQUEST = 0x00
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MSRPC_PING = 0x01
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MSRPC_RESPONSE = 0x02
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MSRPC_FAULT = 0x03
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MSRPC_WORKING = 0x04
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MSRPC_NOCALL = 0x05
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MSRPC_REJECT = 0x06
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MSRPC_ACK = 0x07
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MSRPC_CL_CANCEL = 0x08
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MSRPC_FACK = 0x09
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MSRPC_CANCELACK = 0x0A
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MSRPC_BIND = 0x0B
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MSRPC_BINDACK = 0x0C
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MSRPC_BINDNAK = 0x0D
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MSRPC_ALTERCTX = 0x0E
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MSRPC_ALTERCTX_R= 0x0F
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MSRPC_AUTH3 = 0x10
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MSRPC_SHUTDOWN = 0x11
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MSRPC_CO_CANCEL = 0x12
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MSRPC_ORPHANED = 0x13
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# MS/RPC Packet Flags
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MSRPC_FIRSTFRAG = 0x01
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MSRPC_LASTFRAG = 0x02
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# For PDU types bind, bind_ack, alter_context, and
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# alter_context_resp, this flag MUST be interpreted as PFC_SUPPORT_HEADER_SIGN
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MSRPC_SUPPORT_SIGN = 0x04
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#For the
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#remaining PDU types, this flag MUST be interpreted as PFC_PENDING_CANCEL.
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MSRPC_PENDING_CANCEL= 0x04
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MSRPC_NOTAFRAG = 0x04
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MSRPC_RECRESPOND = 0x08
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MSRPC_NOMULTIPLEX = 0x10
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MSRPC_NOTFORIDEMP = 0x20
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MSRPC_NOTFORBCAST = 0x40
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MSRPC_NOUUID = 0x80
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# Auth Types - Security Providers
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RPC_C_AUTHN_NONE = 0x00
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RPC_C_AUTHN_GSS_NEGOTIATE = 0x09
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RPC_C_AUTHN_WINNT = 0x0A
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RPC_C_AUTHN_GSS_SCHANNEL = 0x0E
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RPC_C_AUTHN_GSS_KERBEROS = 0x10
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RPC_C_AUTHN_NETLOGON = 0x44
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RPC_C_AUTHN_DEFAULT = 0xFF
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# Auth Levels
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RPC_C_AUTHN_LEVEL_NONE = 1
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RPC_C_AUTHN_LEVEL_CONNECT = 2
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RPC_C_AUTHN_LEVEL_CALL = 3
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RPC_C_AUTHN_LEVEL_PKT = 4
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RPC_C_AUTHN_LEVEL_PKT_INTEGRITY = 5
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RPC_C_AUTHN_LEVEL_PKT_PRIVACY = 6
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#Reasons for rejection of a context element, included in bind_ack result reason
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rpc_provider_reason = {
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0 : 'reason_not_specified',
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1 : 'abstract_syntax_not_supported',
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2 : 'proposed_transfer_syntaxes_not_supported',
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3 : 'local_limit_exceeded',
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4 : 'protocol_version_not_specified',
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8 : 'authentication_type_not_recognized',
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9 : 'invalid_checksum'
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}
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MSRPC_CONT_RESULT_ACCEPT = 0
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MSRPC_CONT_RESULT_USER_REJECT = 1
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MSRPC_CONT_RESULT_PROV_REJECT = 2
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#Results of a presentation context negotiation
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rpc_cont_def_result = {
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0 : 'acceptance',
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1 : 'user_rejection',
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2 : 'provider_rejection'
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}
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#status codes, references:
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#http://msdn.microsoft.com/library/default.asp?url=/library/en-us/rpc/rpc/rpc_return_values.asp
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#http://msdn.microsoft.com/library/default.asp?url=/library/en-us/randz/protocol/common_return_values.asp
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#winerror.h
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#http://www.opengroup.org/onlinepubs/9629399/apdxn.htm
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rpc_status_codes = {
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0x00000005L : 'rpc_s_access_denied',
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0x00000008L : 'Authentication type not recognized',
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0x000006D8L : 'rpc_fault_cant_perform',
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0x000006C6L : 'rpc_x_invalid_bound', # the arrays bound are invalid
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0x000006E4L : 'rpc_s_cannot_support: The requested operation is not supported.', # some operation is not supported
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0x000006F7L : 'rpc_x_bad_stub_data', # the stub data is invalid, doesn't match with the IDL definition
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0x1C010001L : 'nca_s_comm_failure', # unable to get response from server:
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0x1C010002L : 'nca_s_op_rng_error', # bad operation number in call
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0x1C010003L : 'nca_s_unk_if', # unknown interface
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0x1C010006L : 'nca_s_wrong_boot_time', # client passed server wrong server boot time
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0x1C010009L : 'nca_s_you_crashed', # a restarted server called back a client
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0x1C01000BL : 'nca_s_proto_error', # someone messed up the protocol
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0x1C010013L : 'nca_s_out_args_too_big ', # output args too big
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0x1C010014L : 'nca_s_server_too_busy', # server is too busy to handle call
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0x1C010015L : 'nca_s_fault_string_too_long', # string argument longer than declared max len
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0x1C010017L : 'nca_s_unsupported_type ', # no implementation of generic operation for object
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0x1C000001L : 'nca_s_fault_int_div_by_zero',
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0x1C000002L : 'nca_s_fault_addr_error ',
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0x1C000003L : 'nca_s_fault_fp_div_zero',
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0x1C000004L : 'nca_s_fault_fp_underflow',
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0x1C000005L : 'nca_s_fault_fp_overflow',
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0x1C000006L : 'nca_s_fault_invalid_tag',
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0x1C000007L : 'nca_s_fault_invalid_bound ',
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0x1C000008L : 'nca_s_rpc_version_mismatch',
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0x1C000009L : 'nca_s_unspec_reject ',
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0x1C00000AL : 'nca_s_bad_actid',
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0x1C00000BL : 'nca_s_who_are_you_failed',
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0x1C00000CL : 'nca_s_manager_not_entered ',
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0x1C00000DL : 'nca_s_fault_cancel',
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0x1C00000EL : 'nca_s_fault_ill_inst',
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0x1C00000FL : 'nca_s_fault_fp_error',
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0x1C000010L : 'nca_s_fault_int_overflow',
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0x1C000012L : 'nca_s_fault_unspec',
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0x1C000013L : 'nca_s_fault_remote_comm_failure ',
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0x1C000014L : 'nca_s_fault_pipe_empty ',
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0x1C000015L : 'nca_s_fault_pipe_closed',
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0x1C000016L : 'nca_s_fault_pipe_order ',
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0x1C000017L : 'nca_s_fault_pipe_discipline',
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0x1C000018L : 'nca_s_fault_pipe_comm_error',
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0x1C000019L : 'nca_s_fault_pipe_memory',
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0x1C00001AL : 'nca_s_fault_context_mismatch ',
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0x1C00001BL : 'nca_s_fault_remote_no_memory ',
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0x1C00001CL : 'nca_s_invalid_pres_context_id',
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0x1C00001DL : 'nca_s_unsupported_authn_level',
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0x1C00001FL : 'nca_s_invalid_checksum ',
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0x1C000020L : 'nca_s_invalid_crc',
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0x1C000021L : 'nca_s_fault_user_defined',
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0x1C000022L : 'nca_s_fault_tx_open_failed',
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0x1C000023L : 'nca_s_fault_codeset_conv_error',
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0x1C000024L : 'nca_s_fault_object_not_found ',
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0x1C000025L : 'nca_s_fault_no_client_stub'
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}
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class Exception(Exception):
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pass
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# Context Item
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class CtxItem(Structure):
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structure = (
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('ContextID','<H=0'),
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('TransItems','B=0'),
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('Pad','B=0'),
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('AbstractSyntax','20s=""'),
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('TransferSyntax','20s=""'),
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)
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class CtxItemResult(Structure):
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structure = (
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('Result','<H=0'),
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('Reason','<H=0'),
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('TransferSyntax','20s=""'),
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)
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class SEC_TRAILER(Structure):
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commonHdr = (
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('auth_type', 'B=10'),
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('auth_level','B=0'),
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('auth_pad_len','B=0'),
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('auth_rsvrd','B=0'),
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('auth_ctx_id','<L=747920'),
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)
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class MSRPCHeader(Structure):
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_SIZE = 16
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commonHdr = (
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('ver_major','B=5'), # 0
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('ver_minor','B=0'), # 1
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('type','B=0'), # 2
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('flags','B=0'), # 3
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('representation','<L=0x10'), # 4
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('frag_len','<H=self._SIZE+len(pduData)+len(pad)+len(sec_trailer)+len(auth_data)'), # 8
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('auth_len','<H=len(auth_data)'), # 10
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('call_id','<L=1'), # 12 <-- Common up to here (including this)
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)
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structure = (
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('dataLen','_-pduData','self["frag_len"]-self["auth_len"]-self._SIZE-(8 if self["auth_len"] > 0 else 0)'),
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('pduData',':'),
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('_pad', '_-pad','(4 - ((self._SIZE + len(self["pduData"])) & 3) & 3)'),
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('pad', ':'),
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('_sec_trailer', '_-sec_trailer', '8 if self["auth_len"] > 0 else 0'),
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('sec_trailer',':'),
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('auth_dataLen','_-auth_data','self["auth_len"]'),
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('auth_data',':'),
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)
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def __init__(self, data = None, alignment = 0):
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Structure.__init__(self,data, alignment)
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if data is None:
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self['ver_major'] = 5
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self['ver_minor'] = 0
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self['flags'] = MSRPC_FIRSTFRAG | MSRPC_LASTFRAG
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self['type'] = MSRPC_REQUEST
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self.__frag_len_set = 0
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self['auth_len'] = 0
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self['pduData'] = ''
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self['auth_data'] = ''
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self['sec_trailer'] = ''
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self['pad'] = ''
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def get_header_size(self):
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return self._SIZE
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def get_packet(self):
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if self['auth_data'] != '':
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self['auth_len'] = len(self['auth_data'])
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# The sec_trailer structure MUST be 4-byte aligned with respect to
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# the beginning of the PDU. Padding octets MUST be used to align the
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# sec_trailer structure if its natural beginning is not already 4-byte aligned
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##self['pad'] = '\xAA' * (4 - ((self._SIZE + len(self['pduData'])) & 3) & 3)
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return self.getData()
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class MSRPCRequestHeader(MSRPCHeader):
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_SIZE = 24
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commonHdr = MSRPCHeader.commonHdr + (
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('alloc_hint','<L=0'), # 16
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('ctx_id','<H=0'), # 20
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('op_num','<H=0'), # 22
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)
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def __init__(self, data = None, alignment = 0):
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MSRPCHeader.__init__(self, data, alignment)
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if data is None:
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self['type'] = MSRPC_REQUEST
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self['ctx_id'] = 0
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class MSRPCRespHeader(MSRPCHeader):
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_SIZE = 24
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commonHdr = MSRPCHeader.commonHdr + (
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('alloc_hint','<L=0'), # 16
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('ctx_id','<H=0'), # 20
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('cancel_count','<B=0'), # 22
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('padding','<B=0'), # 23
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)
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def __init__(self, aBuffer = None, alignment = 0):
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MSRPCHeader.__init__(self, aBuffer, alignment)
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if aBuffer is None:
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self['type'] = MSRPC_RESPONSE
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self['ctx_id'] = 0
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class MSRPCBind(Structure):
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_CTX_ITEM_LEN = len(CtxItem())
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structure = (
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('max_tfrag','<H=4280'),
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('max_rfrag','<H=4280'),
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('assoc_group','<L=0'),
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('ctx_num','B=0'),
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('Reserved','B=0'),
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('Reserved2','<H=0'),
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('_ctx_items', '_-ctx_items', 'self["ctx_num"]*self._CTX_ITEM_LEN'),
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('ctx_items',':'),
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)
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def __init__(self, data = None, alignment = 0):
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Structure.__init__(self, data, alignment)
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if data is None:
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self['max_tfrag'] = 4280
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self['max_rfrag'] = 4280
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self['assoc_group'] = 0
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self['ctx_num'] = 1
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self['ctx_items'] = ''
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self.__ctx_items = []
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def addCtxItem(self, item):
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self.__ctx_items.append(item)
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def getData(self):
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self['ctx_num'] = len(self.__ctx_items)
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for i in self.__ctx_items:
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self['ctx_items'] += i.getData()
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return Structure.getData(self)
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class MSRPCBindAck(Structure):
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_SIZE = 26 # Up to SecondaryAddr
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_CTX_ITEM_LEN = len(CtxItemResult())
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commonHdr = (
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('ver_major','B=5'), # 0
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('ver_minor','B=0'), # 1
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('type','B=0'), # 2
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('flags','B=0'), # 3
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('representation','<L=0x10'), # 4
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('frag_len','<H=0'), # 8
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('auth_len','<H=0'), # 10
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('call_id','<L=1'), # 12 <-- Common up to here (including this)
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)
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structure = (
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('max_tfrag','<H=0'),
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('max_rfrag','<H=0'),
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('assoc_group','<L=0'),
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('SecondaryAddrLen','<H&SecondaryAddr'),
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('SecondaryAddr','z'), # Optional if SecondaryAddrLen == 0
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('PadLen','_-Pad','(4-((self["SecondaryAddrLen"]+self._SIZE) % 4))%4'),
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('Pad',':'),
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('ctx_num','B=0'),
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('Reserved','B=0'),
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('Reserved2','<H=0'),
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('_ctx_items','_-ctx_items','self["ctx_num"]*self._CTX_ITEM_LEN'),
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('ctx_items',':'),
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('_sec_trailer', '_-sec_trailer', '8 if self["auth_len"] > 0 else 0'),
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('sec_trailer',':'),
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('auth_dataLen','_-auth_data','self["auth_len"]'),
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('auth_data',':'),
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)
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def __init__(self, data = None, alignment = 0):
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self.__ctx_items = []
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Structure.__init__(self,data,alignment)
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if data is None:
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self['Pad'] = ''
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self['ctx_items'] = ''
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self['sec_trailer'] = ''
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self['auth_data'] = ''
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def getCtxItems(self):
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return self.__ctx_items
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def getCtxItem(self,index):
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return self.__ctx_items[index-1]
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def fromString(self, data):
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Structure.fromString(self,data)
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# Parse the ctx_items
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data = self['ctx_items']
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for i in range(self['ctx_num']):
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item = CtxItemResult(data)
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self.__ctx_items.append(item)
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data = data[len(item):]
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class MSRPCBindNak(Structure):
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structure = (
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('RejectedReason','<H=0'),
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('SupportedVersions',':'),
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)
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def __init__(self, data = None, alignment = 0):
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Structure.__init__(self,data,alignment)
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if data is None:
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self['SupportedVersions'] = ''
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