include/rpc_dce.h

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/* 
   Unix SMB/CIFS implementation.
   SMB parameters and setup
   Copyright (C) Andrew Tridgell 1992-1997
   Copyright (C) Luke Kenneth Casson Leighton 1996-1997
   Copyright (C) Paul Ashton 1997
   
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.
   
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
   
   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/

#ifndef _DCE_RPC_H /* _DCE_RPC_H */
#define _DCE_RPC_H 

/* DCE/RPC packet types */

enum RPC_PKT_TYPE {
        RPC_REQUEST  = 0x00,    /* Ordinary request. */
        RPC_PING     = 0x01,    /* Connectionless is server alive ? */
        RPC_RESPONSE = 0x02,    /* Ordinary reply. */
        RPC_FAULT    = 0x03,    /* Fault in processing of call. */
        RPC_WORKING  = 0x04,    /* Connectionless reply to a ping when server busy. */
        RPC_NOCALL   = 0x05,    /* Connectionless reply to a ping when server has lost part of clients call. */
        RPC_REJECT   = 0x06,    /* Refuse a request with a code. */
        RPC_ACK      = 0x07,    /* Connectionless client to server code. */
        RPC_CL_CANCEL= 0x08,    /* Connectionless cancel. */
        RPC_FACK     = 0x09,    /* Connectionless fragment ack. Both client and server send. */
        RPC_CANCEL_ACK = 0x0A,  /* Server ACK to client cancel request. */
        RPC_BIND     = 0x0B,    /* Bind to interface. */
        RPC_BINDACK  = 0x0C,    /* Server ack of bind. */
        RPC_BINDNACK = 0x0D,    /* Server nack of bind. */
        RPC_ALTCONT  = 0x0E,    /* Alter auth. */
        RPC_ALTCONTRESP = 0x0F, /* Reply to alter auth. */
        RPC_AUTH3    = 0x10,    /* not the real name!  this is undocumented! */
        RPC_SHUTDOWN = 0x11,    /* Server to client request to shutdown. */
        RPC_CO_CANCEL= 0x12,    /* Connection-oriented cancel request. */
        RPC_ORPHANED = 0x13     /* Client telling server it's aborting a partially sent request or telling
                                   server to stop sending replies. */
};

/* DCE/RPC flags */
#define RPC_FLG_FIRST 0x01
#define RPC_FLG_LAST  0x02
#define RPC_FLG_NOCALL 0x20


#define SMBD_NTLMSSP_NEG_FLAGS 0x000082b1 /* ALWAYS_SIGN|NEG_NTLM|NEG_LM|NEG_SEAL|NEG_SIGN|NEG_UNICODE */

/* NTLMSSP signature version */
#define NTLMSSP_SIGN_VERSION 0x01

/* DCE RPC auth types - extended by Microsoft. */
#define RPC_ANONYMOUS_AUTH_TYPE    0
#define RPC_AUTH_TYPE_KRB5_1       1
#define RPC_SPNEGO_AUTH_TYPE       9 
#define RPC_NTLMSSP_AUTH_TYPE     10
#define RPC_KRB5_AUTH_TYPE        16 /* Not yet implemented. */ 
#define RPC_SCHANNEL_AUTH_TYPE    68 /* 0x44 */

/* DCE-RPC standard identifiers to indicate 
   signing or sealing of an RPC pipe */
#define RPC_AUTH_LEVEL_NONE      1
#define RPC_AUTH_LEVEL_CONNECT   2
#define RPC_AUTH_LEVEL_CALL      3
#define RPC_AUTH_LEVEL_PACKET    4
#define RPC_AUTH_LEVEL_INTEGRITY 5
#define RPC_AUTH_LEVEL_PRIVACY   6

#if 0
#define RPC_PIPE_AUTH_SIGN_LEVEL 0x5
#define RPC_PIPE_AUTH_SEAL_LEVEL 0x6
#endif

#define DCERPC_FAULT_OP_RNG_ERROR       0x1c010002
#define DCERPC_FAULT_UNK_IF             0x1c010003
#define DCERPC_FAULT_INVALID_TAG        0x1c000006
#define DCERPC_FAULT_CONTEXT_MISMATCH   0x1c00001a
#define DCERPC_FAULT_OTHER              0x00000001
#define DCERPC_FAULT_ACCESS_DENIED      0x00000005
#define DCERPC_FAULT_CANT_PERFORM       0x000006d8
#define DCERPC_FAULT_NDR                0x000006f7


/* Netlogon schannel auth type and level */
#define SCHANNEL_SIGN_SIGNATURE { 0x77, 0x00, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00 }
#define SCHANNEL_SEAL_SIGNATURE { 0x77, 0x00, 0x7a, 0x00, 0xff, 0xff, 0x00, 0x00 }

#define RPC_AUTH_SCHANNEL_SIGN_OR_SEAL_CHK_LEN  0x20
#define RPC_AUTH_SCHANNEL_SIGN_ONLY_CHK_LEN     0x18


#define NETLOGON_NEG_ARCFOUR                    0x00000004
#define NETLOGON_NEG_128BIT                     0x00004000
#define NETLOGON_NEG_SCHANNEL                   0x40000000

#define NETLOGON_NEG_PASSWORD_SET2              0x00020000

/* The 7 here seems to be required to get Win2k not to downgrade us
   to NT4.  Actually, anything other than 1ff would seem to do... */
#define NETLOGON_NEG_AUTH2_FLAGS 0x000701ff
#define NETLOGON_NEG_DOMAIN_TRUST_ACCOUNT       0x2010b000

/* these are the flags that ADS clients use */
#define NETLOGON_NEG_AUTH2_ADS_FLAGS 0x600fffff

enum schannel_direction {
        SENDER_IS_INITIATOR,
        SENDER_IS_ACCEPTOR
};

/* Maximum size of the signing data in a fragment. */
#define RPC_MAX_SIGN_SIZE 0x20 /* 32 */

/* Maximum PDU fragment size. */
/* #define MAX_PDU_FRAG_LEN 0x1630              this is what wnt sets */
#define RPC_MAX_PDU_FRAG_LEN 0x10b8                     /* this is what w2k sets */

/* RPC_IFACE */
typedef struct rpc_iface_info {
        struct GUID uuid;  /* 16 bytes of rpc interface identification */
        uint32 version;    /* the interface version number */
} RPC_IFACE;

#define RPC_IFACE_LEN (UUID_SIZE + 4)

struct pipe_id_info {
        /* the names appear not to matter: the syntaxes _do_ matter */

        const char *client_pipe;
        RPC_IFACE abstr_syntax; /* this one is the abstract syntax id */

        const char *server_pipe;  /* this one is the secondary syntax name */
        RPC_IFACE trans_syntax; /* this one is the primary syntax id */
};

/* RPC_HDR - dce rpc header */
typedef struct rpc_hdr_info {
        uint8  major; /* 5 - RPC major version */
        uint8  minor; /* 0 - RPC minor version */
        uint8  pkt_type; /* RPC_PKT_TYPE - RPC response packet */
        uint8  flags; /* DCE/RPC flags */
        uint8  pack_type[4]; /* 0x1000 0000 - little-endian packed data representation */
        uint16 frag_len; /* fragment length - data size (bytes) inc header and tail. */
        uint16 auth_len; /* 0 - authentication length  */
        uint32 call_id; /* call identifier.  matches 12th uint32 of incoming RPC data. */
} RPC_HDR;

#define RPC_HEADER_LEN 16

/* RPC_HDR_REQ - ms request rpc header */
typedef struct rpc_hdr_req_info {
        uint32 alloc_hint;   /* allocation hint - data size (bytes) minus header and tail. */
        uint16 context_id;   /* presentation context identifier */
        uint16  opnum;       /* opnum */
} RPC_HDR_REQ;

#define RPC_HDR_REQ_LEN 8

/* RPC_HDR_RESP - ms response rpc header */
typedef struct rpc_hdr_resp_info {
        uint32 alloc_hint;   /* allocation hint - data size (bytes) minus header and tail. */
        uint16 context_id;   /* 0 - presentation context identifier */
        uint8  cancel_count; /* 0 - cancel count */
        uint8  reserved;     /* 0 - reserved. */
} RPC_HDR_RESP;

#define RPC_HDR_RESP_LEN 8

/* RPC_HDR_FAULT - fault rpc header */
typedef struct rpc_hdr_fault_info {
        NTSTATUS status;
        uint32 reserved; /* 0x0000 0000 */
} RPC_HDR_FAULT;

#define RPC_HDR_FAULT_LEN 8

/* this seems to be the same string name depending on the name of the pipe,
 * but is more likely to be linked to the interface name
 * "srvsvc", "\\PIPE\\ntsvcs"
 * "samr", "\\PIPE\\lsass"
 * "wkssvc", "\\PIPE\\wksvcs"
 * "NETLOGON", "\\PIPE\\NETLOGON"
 */
/* RPC_ADDR_STR */
typedef struct rpc_addr_info {
        uint16 len;   /* length of the string including null terminator */
        fstring str; /* the string above in single byte, null terminated form */
} RPC_ADDR_STR;

/* RPC_HDR_BBA - bind acknowledge, and alter context response. */
typedef struct rpc_hdr_bba_info {
        uint16 max_tsize;       /* maximum transmission fragment size (0x1630) */
        uint16 max_rsize;       /* max receive fragment size (0x1630) */
        uint32 assoc_gid;       /* associated group id (0x0) */
} RPC_HDR_BBA;

#define RPC_HDR_BBA_LEN 8

/* RPC_HDR_AUTH */
typedef struct rpc_hdr_auth_info {
        uint8 auth_type; /* See XXX_AUTH_TYPE above. */
        uint8 auth_level; /* See RPC_PIPE_AUTH_XXX_LEVEL above. */
        uint8 auth_pad_len;
        uint8 auth_reserved;
        uint32 auth_context_id;
} RPC_HDR_AUTH;

#define RPC_HDR_AUTH_LEN 8

/* this is TEMPORARILY coded up as a specific structure */
/* this structure comes after the bind request */
/* RPC_AUTH_SCHANNEL_NEG */
typedef struct rpc_auth_schannel_neg_info {
        uint32 type1;   /* Always zero ? */
        uint32 type2;   /* Types 0x3 and 0x13 seen. Check AcquireSecurityContext() docs.... */
        fstring domain; /* calling workstations's domain */
        fstring myname; /* calling workstation's name */
} RPC_AUTH_SCHANNEL_NEG;

/* attached to the end of encrypted rpc requests and responses */
/* RPC_AUTH_SCHANNEL_CHK */
typedef struct rpc_auth_schannel_chk_info {
        uint8 sig  [8]; /* 77 00 7a 00 ff ff 00 00 */
        uint8 packet_digest[8]; /* checksum over the packet, MD5'ed with session key */
        uint8 seq_num[8]; /* verifier, seq num */
        uint8 confounder[8]; /* random 8-byte nonce */
} RPC_AUTH_SCHANNEL_CHK;

typedef struct rpc_context {
        uint16 context_id;              /* presentation context identifier. */
        uint8 num_transfer_syntaxes;    /* the number of syntaxes */
        RPC_IFACE abstract;             /* num and vers. of interface client is using */
        RPC_IFACE *transfer;            /* Array of transfer interfaces. */
} RPC_CONTEXT;

/* RPC_BIND_REQ - ms req bind */
typedef struct rpc_bind_req_info {
        RPC_HDR_BBA bba;
        uint8 num_contexts;    /* the number of contexts */
        RPC_CONTEXT *rpc_context;
} RPC_HDR_RB;

/* 
 * The following length is 8 bytes RPC_HDR_BBA_LEN + 
 * 4 bytes size of context count +
 * (context_count * (4 bytes of context_id, size of transfer syntax count + RPC_IFACE_LEN bytes +
 *                    (transfer_syntax_count * RPC_IFACE_LEN bytes)))
 */

#define RPC_HDR_RB_LEN(rpc_hdr_rb) (RPC_HDR_BBA_LEN + 4 + \
        ((rpc_hdr_rb)->num_contexts) * (4 + RPC_IFACE_LEN + (((rpc_hdr_rb)->rpc_context->num_transfer_syntaxes)*RPC_IFACE_LEN)))

/* RPC_RESULTS - can only cope with one reason, right now... */
typedef struct rpc_results_info {
        /* uint8[] # 4-byte alignment padding, against SMB header */

        uint8 num_results; /* the number of results (0x01) */

        /* uint8[] # 4-byte alignment padding, against SMB header */

        uint16 result; /* result (0x00 = accept) */
        uint16 reason; /* reason (0x00 = no reason specified) */
} RPC_RESULTS;

/* RPC_HDR_BA */
typedef struct rpc_hdr_ba_info {
        RPC_HDR_BBA bba;

        RPC_ADDR_STR addr    ;  /* the secondary address string, as described earlier */
        RPC_RESULTS  res     ; /* results and reasons */
        RPC_IFACE    transfer; /* the transfer syntax from the request */
} RPC_HDR_BA;

/* RPC_AUTH_VERIFIER */
typedef struct rpc_auth_verif_info {
        fstring signature; /* "NTLMSSP".. Ok, not quite anymore */
        uint32  msg_type; /* NTLMSSP_MESSAGE_TYPE (1,2,3) and 5 for schannel */
} RPC_AUTH_VERIFIER;

#endif /* _DCE_RPC_H */

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