diff options
Diffstat (limited to 'source4/rpc_client/cli_pipe.c')
| -rw-r--r-- | source4/rpc_client/cli_pipe.c | 1357 |
1 files changed, 1357 insertions, 0 deletions
diff --git a/source4/rpc_client/cli_pipe.c b/source4/rpc_client/cli_pipe.c new file mode 100644 index 0000000000..0fa2b4ad40 --- /dev/null +++ b/source4/rpc_client/cli_pipe.c @@ -0,0 +1,1357 @@ +/* + * Unix SMB/CIFS implementation. + * RPC Pipe client / server routines + * Copyright (C) Andrew Tridgell 1992-1998, + * Copyright (C) Luke Kenneth Casson Leighton 1996-1998, + * Copyright (C) Paul Ashton 1998. + * Copyright (C) Jeremy Allison 1999. + * + * 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. + */ + +#include "includes.h" + +#undef DBGC_CLASS +#define DBGC_CLASS DBGC_RPC_CLI + +extern struct pipe_id_info pipe_names[]; + +/******************************************************************** + Rpc pipe call id. + ********************************************************************/ + +static uint32 get_rpc_call_id(void) +{ + static uint32 call_id = 0; + return ++call_id; +} + +/******************************************************************* + Use SMBreadX to get rest of one fragment's worth of rpc data. + ********************************************************************/ + +static BOOL rpc_read(struct cli_state *cli, prs_struct *rdata, uint32 data_to_read, uint32 *rdata_offset) +{ + size_t size = (size_t)cli->max_recv_frag; + int stream_offset = 0; + int num_read; + char *pdata; + int extra_data_size = ((int)*rdata_offset) + ((int)data_to_read) - (int)prs_data_size(rdata); + + DEBUG(5,("rpc_read: data_to_read: %u rdata offset: %u extra_data_size: %d\n", + (int)data_to_read, (unsigned int)*rdata_offset, extra_data_size)); + + /* + * Grow the buffer if needed to accommodate the data to be read. + */ + + if (extra_data_size > 0) { + if(!prs_force_grow(rdata, (uint32)extra_data_size)) { + DEBUG(0,("rpc_read: Failed to grow parse struct by %d bytes.\n", extra_data_size )); + return False; + } + DEBUG(5,("rpc_read: grew buffer by %d bytes to %u\n", extra_data_size, prs_data_size(rdata) )); + } + + pdata = prs_data_p(rdata) + *rdata_offset; + + do /* read data using SMBreadX */ + { + uint32 ecode; + uint8 eclass; + + if (size > (size_t)data_to_read) + size = (size_t)data_to_read; + + num_read = (int)cli_read(cli, cli->nt_pipe_fnum, pdata, (off_t)stream_offset, size); + + DEBUG(5,("rpc_read: num_read = %d, read offset: %d, to read: %d\n", + num_read, stream_offset, data_to_read)); + + if (cli_is_dos_error(cli)) { + cli_dos_error(cli, &eclass, &ecode); + if (eclass != ERRDOS && ecode != ERRmoredata) { + DEBUG(0,("rpc_read: Error %d/%u in cli_read\n", + eclass, (unsigned int)ecode)); + return False; + } + } + + data_to_read -= num_read; + stream_offset += num_read; + pdata += num_read; + + } while (num_read > 0 && data_to_read > 0); + /* && err == (0x80000000 | STATUS_BUFFER_OVERFLOW)); */ + + /* + * Update the current offset into rdata by the amount read. + */ + *rdata_offset += stream_offset; + + return True; +} + +/**************************************************************************** + Checks the header. This will set the endian bit in the rdata prs_struct. JRA. + ****************************************************************************/ + +static BOOL rpc_check_hdr(prs_struct *rdata, RPC_HDR *rhdr, + BOOL *first, BOOL *last, uint32 *len) +{ + DEBUG(5,("rpc_check_hdr: rdata->data_size = %u\n", (uint32)prs_data_size(rdata) )); + + /* Next call sets endian bit. */ + + if(!smb_io_rpc_hdr("rpc_hdr ", rhdr, rdata, 0)) { + DEBUG(0,("rpc_check_hdr: Failed to unmarshall RPC_HDR.\n")); + return False; + } + + if (prs_offset(rdata) != RPC_HEADER_LEN) { + DEBUG(0,("rpc_check_hdr: offset was %x, should be %x.\n", prs_offset(rdata), RPC_HEADER_LEN)); + return False; + } + + (*first) = ((rhdr->flags & RPC_FLG_FIRST) != 0); + (*last) = ((rhdr->flags & RPC_FLG_LAST ) != 0); + (*len) = (uint32)rhdr->frag_len - prs_data_size(rdata); + + return (rhdr->pkt_type != RPC_FAULT); +} + +static void NTLMSSPcalc_ap( struct cli_state *cli, unsigned char *data, uint32 len) +{ + unsigned char *hash = cli->ntlmssp_hash; + unsigned char index_i = hash[256]; + unsigned char index_j = hash[257]; + int ind; + + for( ind = 0; ind < len; ind++) { + unsigned char tc; + unsigned char t; + + index_i++; + index_j += hash[index_i]; + + tc = hash[index_i]; + hash[index_i] = hash[index_j]; + hash[index_j] = tc; + + t = hash[index_i] + hash[index_j]; + data[ind] = data[ind] ^ hash[t]; + } + + hash[256] = index_i; + hash[257] = index_j; +} + +/**************************************************************************** + Verify data on an rpc pipe. + The VERIFY & SEAL code is only executed on packets that look like this : + + Request/Response PDU's look like the following... + + |<------------------PDU len----------------------------------------------->| + |<-HDR_LEN-->|<--REQ LEN------>|.............|<-AUTH_HDRLEN->|<-AUTH_LEN-->| + + +------------+-----------------+-------------+---------------+-------------+ + | RPC HEADER | REQ/RESP HEADER | DATA ...... | AUTH_HDR | AUTH DATA | + +------------+-----------------+-------------+---------------+-------------+ + + Never on bind requests/responses. + ****************************************************************************/ + +static BOOL rpc_auth_pipe(struct cli_state *cli, prs_struct *rdata, int len, int auth_len) +{ + /* + * The following is that length of the data we must sign or seal. + * This doesn't include the RPC headers or the auth_len or the RPC_HDR_AUTH_LEN + * preceeding the auth_data. + */ + + int data_len = len - RPC_HEADER_LEN - RPC_HDR_RESP_LEN - RPC_HDR_AUTH_LEN - auth_len; + + /* + * The start of the data to sign/seal is just after the RPC headers. + */ + char *reply_data = prs_data_p(rdata) + RPC_HEADER_LEN + RPC_HDR_REQ_LEN; + + BOOL auth_verify = ((cli->ntlmssp_srv_flgs & NTLMSSP_NEGOTIATE_SIGN) != 0); + BOOL auth_seal = ((cli->ntlmssp_srv_flgs & NTLMSSP_NEGOTIATE_SEAL) != 0); + + DEBUG(5,("rpc_auth_pipe: len: %d auth_len: %d verify %s seal %s\n", + len, auth_len, BOOLSTR(auth_verify), BOOLSTR(auth_seal))); + + /* + * Unseal any sealed data in the PDU, not including the + * 8 byte auth_header or the auth_data. + */ + + if (auth_seal) { + DEBUG(10,("rpc_auth_pipe: unseal\n")); + dump_data(100, reply_data, data_len); + NTLMSSPcalc_ap(cli, (uchar*)reply_data, data_len); + dump_data(100, reply_data, data_len); + } + + if (auth_verify || auth_seal) { + RPC_HDR_AUTH rhdr_auth; + prs_struct auth_req; + char data[RPC_HDR_AUTH_LEN]; + /* + * We set dp to be the end of the packet, minus the auth_len + * and the length of the header that preceeds the auth_data. + */ + char *dp = prs_data_p(rdata) + len - auth_len - RPC_HDR_AUTH_LEN; + + if(dp - prs_data_p(rdata) > prs_data_size(rdata)) { + DEBUG(0,("rpc_auth_pipe: auth data > data size !\n")); + return False; + } + + memcpy(data, dp, sizeof(data)); + + prs_init(&auth_req , 0, cli->mem_ctx, UNMARSHALL); + + /* The endianness must be preserved... JRA. */ + + prs_set_endian_data(&auth_req, rdata->bigendian_data); + + prs_give_memory(&auth_req, data, RPC_HDR_AUTH_LEN, False); + + /* + * Unmarshall the 8 byte auth_header that comes before the + * auth data. + */ + + if(!smb_io_rpc_hdr_auth("hdr_auth", &rhdr_auth, &auth_req, 0)) { + DEBUG(0,("rpc_auth_pipe: unmarshalling RPC_HDR_AUTH failed.\n")); + return False; + } + + if (!rpc_hdr_auth_chk(&rhdr_auth)) { + DEBUG(0,("rpc_auth_pipe: rpc_hdr_auth_chk failed.\n")); + return False; + } + } + + /* + * Now unseal and check the auth verifier in the auth_data at + * then end of the packet. The 4 bytes skipped in the unseal + * seem to be a buffer pointer preceeding the sealed data. + */ + + if (auth_verify) { + RPC_AUTH_NTLMSSP_CHK chk; + uint32 crc32; + prs_struct auth_verf; + char data[RPC_AUTH_NTLMSSP_CHK_LEN]; + char *dp = prs_data_p(rdata) + len - auth_len; + + if(dp - prs_data_p(rdata) > prs_data_size(rdata)) { + DEBUG(0,("rpc_auth_pipe: auth data > data size !\n")); + return False; + } + + DEBUG(10,("rpc_auth_pipe: verify\n")); + dump_data(100, dp, auth_len); + NTLMSSPcalc_ap(cli, (uchar*)(dp+4), auth_len - 4); + + memcpy(data, dp, RPC_AUTH_NTLMSSP_CHK_LEN); + dump_data(100, data, auth_len); + + prs_init(&auth_verf, 0, cli->mem_ctx, UNMARSHALL); + + /* The endinness must be preserved. JRA. */ + prs_set_endian_data( &auth_verf, rdata->bigendian_data); + + prs_give_memory(&auth_verf, data, RPC_AUTH_NTLMSSP_CHK_LEN, False); + + if(!smb_io_rpc_auth_ntlmssp_chk("auth_sign", &chk, &auth_verf, 0)) { + DEBUG(0,("rpc_auth_pipe: unmarshalling RPC_AUTH_NTLMSSP_CHK failed.\n")); + return False; + } + + crc32 = crc32_calc_buffer(reply_data, data_len); + + if (!rpc_auth_ntlmssp_chk(&chk, crc32 , cli->ntlmssp_seq_num)) { + DEBUG(0,("rpc_auth_pipe: rpc_auth_ntlmssp_chk failed.\n")); + return False; + } + cli->ntlmssp_seq_num++; + } + return True; +} + + +/**************************************************************************** + Send data on an rpc pipe via trans, which *must* be the last fragment. + receive response data from an rpc pipe, which may be large... + + Read the first fragment: unfortunately have to use SMBtrans for the first + bit, then SMBreadX for subsequent bits. + + If first fragment received also wasn't the last fragment, continue + getting fragments until we _do_ receive the last fragment. + + Request/Response PDU's look like the following... + + |<------------------PDU len----------------------------------------------->| + |<-HDR_LEN-->|<--REQ LEN------>|.............|<-AUTH_HDRLEN->|<-AUTH_LEN-->| + + +------------+-----------------+-------------+---------------+-------------+ + | RPC HEADER | REQ/RESP HEADER | DATA ...... | AUTH_HDR | AUTH DATA | + +------------+-----------------+-------------+---------------+-------------+ + + Where the presence of the AUTH_HDR and AUTH are dependent on the + signing & sealing being neogitated. + + ****************************************************************************/ + +static BOOL rpc_api_pipe(struct cli_state *cli, prs_struct *data, prs_struct *rdata) +{ + uint32 len; + char *rparam = NULL; + uint32 rparam_len = 0; + uint16 setup[2]; + BOOL first = True; + BOOL last = True; + RPC_HDR rhdr; + char *pdata = data ? prs_data_p(data) : NULL; + uint32 data_len = data ? prs_offset(data) : 0; + char *prdata = NULL; + uint32 rdata_len = 0; + uint32 current_offset = 0; + uint32 max_data = cli->max_xmit_frag ? cli->max_xmit_frag : 1024; + + /* Create setup parameters - must be in native byte order. */ + + setup[0] = TRANSACT_DCERPCCMD; + setup[1] = cli->nt_pipe_fnum; /* Pipe file handle. */ + + DEBUG(5,("rpc_api_pipe: fnum:%x\n", (int)cli->nt_pipe_fnum)); + + /* Send the RPC request and receive a response. For short RPC + calls (about 1024 bytes or so) the RPC request and response + appears in a SMBtrans request and response. Larger RPC + responses are received further on. */ + + if (!cli_api_pipe(cli, "\\PIPE\\", + setup, 2, 0, /* Setup, length, max */ + NULL, 0, 0, /* Params, length, max */ + pdata, data_len, max_data, /* data, length, max */ + &rparam, &rparam_len, /* return params, len */ + &prdata, &rdata_len)) /* return data, len */ + { + DEBUG(0, ("cli_pipe: return critical error. Error was %s\n", cli_errstr(cli))); + return False; + } + + /* Throw away returned params - we know we won't use them. */ + + SAFE_FREE(rparam); + + if (prdata == NULL) { + DEBUG(0,("rpc_api_pipe: pipe %x failed to return data.\n", + (int)cli->nt_pipe_fnum)); + return False; + } + + /* + * Give this memory as dynamically allocated to the return parse + * struct. + */ + + prs_give_memory(rdata, prdata, rdata_len, True); + current_offset = rdata_len; + + /* This next call sets the endian bit correctly in rdata. */ + + if (!rpc_check_hdr(rdata, &rhdr, &first, &last, &len)) { + prs_mem_free(rdata); + return False; + } + + if (rhdr.pkt_type == RPC_BINDACK) { + if (!last && !first) { + DEBUG(5,("rpc_api_pipe: bug in server (AS/U?), setting fragment first/last ON.\n")); + first = True; + last = True; + } + } + + if (rhdr.pkt_type == RPC_RESPONSE) { + RPC_HDR_RESP rhdr_resp; + if(!smb_io_rpc_hdr_resp("rpc_hdr_resp", &rhdr_resp, rdata, 0)) { + DEBUG(5,("rpc_api_pipe: failed to unmarshal RPC_HDR_RESP.\n")); + prs_mem_free(rdata); + return False; + } + } + + DEBUG(5,("rpc_api_pipe: len left: %u smbtrans read: %u\n", + (unsigned int)len, (unsigned int)rdata_len )); + + /* check if data to be sent back was too large for one SMBtrans */ + /* err status is only informational: the _real_ check is on the + length */ + + if (len > 0) { + /* || err == (0x80000000 | STATUS_BUFFER_OVERFLOW)) */ + + /* Read the remaining part of the first response fragment */ + + if (!rpc_read(cli, rdata, len, ¤t_offset)) { + prs_mem_free(rdata); + return False; + } + } + + /* + * Now we have a complete PDU, check the auth struct if any was sent. + */ + + if (rhdr.auth_len != 0) { + if(!rpc_auth_pipe(cli, rdata, rhdr.frag_len, rhdr.auth_len)) + return False; + /* + * Drop the auth footers from the current offset. + * We need this if there are more fragments. + * The auth footers consist of the auth_data and the + * preceeding 8 byte auth_header. + */ + current_offset -= (rhdr.auth_len + RPC_HDR_AUTH_LEN); + } + + /* + * Only one rpc fragment, and it has been read. + */ + + if (first && last) { + DEBUG(6,("rpc_api_pipe: fragment first and last both set\n")); + return True; + } + + /* + * Read more fragments using SMBreadX until we get one with the + * last bit set. + */ + + while (!last) { + RPC_HDR_RESP rhdr_resp; + int num_read; + char hdr_data[RPC_HEADER_LEN+RPC_HDR_RESP_LEN]; + prs_struct hps; + uint8 eclass; + uint32 ecode; + + /* + * First read the header of the next PDU. + */ + + prs_init(&hps, 0, cli->mem_ctx, UNMARSHALL); + prs_give_memory(&hps, hdr_data, sizeof(hdr_data), False); + + num_read = cli_read(cli, cli->nt_pipe_fnum, hdr_data, 0, RPC_HEADER_LEN+RPC_HDR_RESP_LEN); + if (cli_is_dos_error(cli)) { + cli_dos_error(cli, &eclass, &ecode); + if (eclass != ERRDOS && ecode != ERRmoredata) { + DEBUG(0,("rpc_api_pipe: cli_read error : %d/%d\n", eclass, ecode)); + return False; + } + } + + DEBUG(5,("rpc_api_pipe: read header (size:%d)\n", num_read)); + + if (num_read != RPC_HEADER_LEN+RPC_HDR_RESP_LEN) { + DEBUG(0,("rpc_api_pipe: Error : requested %d bytes, got %d.\n", + RPC_HEADER_LEN+RPC_HDR_RESP_LEN, num_read )); + return False; + } + + /* This call sets the endianness in hps. */ + + if (!rpc_check_hdr(&hps, &rhdr, &first, &last, &len)) + return False; + + /* Ensure the endianness in rdata is set correctly - must be same as hps. */ + + if (hps.bigendian_data != rdata->bigendian_data) { + DEBUG(0,("rpc_api_pipe: Error : Endianness changed from %s to %s\n", + rdata->bigendian_data ? "big" : "little", + hps.bigendian_data ? "big" : "little" )); + return False; + } + + if(!smb_io_rpc_hdr_resp("rpc_hdr_resp", &rhdr_resp, &hps, 0)) { + DEBUG(0,("rpc_api_pipe: Error in unmarshalling RPC_HDR_RESP.\n")); + return False; + } + + if (first) { + DEBUG(0,("rpc_api_pipe: secondary PDU rpc header has 'first' set !\n")); + return False; + } + + /* + * Now read the rest of the PDU. + */ + + if (!rpc_read(cli, rdata, len, ¤t_offset)) + return False; + + /* + * Verify any authentication footer. + */ + + if (rhdr.auth_len != 0 ) { + if(!rpc_auth_pipe(cli, rdata, rhdr.frag_len, rhdr.auth_len)) + return False; + /* + * Drop the auth footers from the current offset. + * The auth footers consist of the auth_data and the + * preceeding 8 byte auth_header. + * We need this if there are more fragments. + */ + current_offset -= (rhdr.auth_len + RPC_HDR_AUTH_LEN); + } + } + + return True; +} + +/******************************************************************* + creates a DCE/RPC bind request + + - initialises the parse structure. + - dynamically allocates the header data structure + - caller is expected to free the header data structure once used. + + ********************************************************************/ + +static BOOL create_rpc_bind_req(prs_struct *rpc_out, BOOL do_auth, uint32 rpc_call_id, + RPC_IFACE *abstract, RPC_IFACE *transfer, + const char *my_name, const char *domain, uint32 neg_flags) +{ + RPC_HDR hdr; + RPC_HDR_RB hdr_rb; + char buffer[4096]; + prs_struct auth_info; + int auth_len = 0; + + prs_init(&auth_info, 0, prs_get_mem_context(rpc_out), MARSHALL); + + if (do_auth) { + RPC_HDR_AUTH hdr_auth; + RPC_AUTH_VERIFIER auth_verifier; + RPC_AUTH_NTLMSSP_NEG ntlmssp_neg; + + /* + * Create the auth structs we will marshall. + */ + + init_rpc_hdr_auth(&hdr_auth, NTLMSSP_AUTH_TYPE, NTLMSSP_AUTH_LEVEL, 0x00, 1); + init_rpc_auth_verifier(&auth_verifier, "NTLMSSP", NTLMSSP_NEGOTIATE); + init_rpc_auth_ntlmssp_neg(&ntlmssp_neg, neg_flags, my_name, domain); + + /* + * Use the 4k buffer to store the auth info. + */ + + prs_give_memory( &auth_info, buffer, sizeof(buffer), False); + + /* + * Now marshall the data into the temporary parse_struct. + */ + + if(!smb_io_rpc_hdr_auth("hdr_auth", &hdr_auth, &auth_info, 0)) { + DEBUG(0,("create_rpc_bind_req: failed to marshall RPC_HDR_AUTH.\n")); + return False; + } + + if(!smb_io_rpc_auth_verifier("auth_verifier", &auth_verifier, &auth_info, 0)) { + DEBUG(0,("create_rpc_bind_req: failed to marshall RPC_AUTH_VERIFIER.\n")); + return False; + } + + if(!smb_io_rpc_auth_ntlmssp_neg("ntlmssp_neg", &ntlmssp_neg, &auth_info, 0)) { + DEBUG(0,("create_rpc_bind_req: failed to marshall RPC_AUTH_NTLMSSP_NEG.\n")); + return False; + } + + /* Auth len in the rpc header doesn't include auth_header. */ + auth_len = prs_offset(&auth_info) - RPC_HDR_AUTH_LEN; + } + + /* create the request RPC_HDR */ + init_rpc_hdr(&hdr, RPC_BIND, 0x3, rpc_call_id, + RPC_HEADER_LEN + RPC_HDR_RB_LEN + prs_offset(&auth_info), + auth_len); + + if(!smb_io_rpc_hdr("hdr" , &hdr, rpc_out, 0)) { + DEBUG(0,("create_rpc_bind_req: failed to marshall RPC_HDR.\n")); + return False; + } + + /* create the bind request RPC_HDR_RB */ + init_rpc_hdr_rb(&hdr_rb, MAX_PDU_FRAG_LEN, MAX_PDU_FRAG_LEN, 0x0, + 0x1, 0x0, 0x1, abstract, transfer); + + /* Marshall the bind request data */ + if(!smb_io_rpc_hdr_rb("", &hdr_rb, rpc_out, 0)) { + DEBUG(0,("create_rpc_bind_req: failed to marshall RPC_HDR_RB.\n")); + return False; + } + + /* + * Grow the outgoing buffer to store any auth info. + */ + + if(hdr.auth_len != 0) { + if(!prs_append_prs_data( rpc_out, &auth_info)) { + DEBUG(0,("create_rpc_bind_req: failed to grow parse struct to add auth.\n")); + return False; + } + } + + return True; +} + +/******************************************************************* + Creates a DCE/RPC bind authentication response. + This is the packet that is sent back to the server once we + have received a BIND-ACK, to finish the third leg of + the authentication handshake. + ********************************************************************/ + +static BOOL create_rpc_bind_resp(struct pwd_info *pwd, + const char *domain, const char *user_name, const char *my_name, + uint32 ntlmssp_cli_flgs, + uint32 rpc_call_id, + prs_struct *rpc_out) +{ + unsigned char lm_owf[24]; + unsigned char nt_owf[24]; + RPC_HDR hdr; + RPC_HDR_AUTHA hdr_autha; + RPC_AUTH_VERIFIER auth_verifier; + RPC_AUTH_NTLMSSP_RESP ntlmssp_resp; + char buffer[4096]; + prs_struct auth_info; + + /* + * Marshall the variable length data into a temporary parse + * struct, pointing into a 4k local buffer. + */ + prs_init(&auth_info, 0, prs_get_mem_context(rpc_out), MARSHALL); + + /* + * Use the 4k buffer to store the auth info. + */ + + prs_give_memory( &auth_info, buffer, sizeof(buffer), False); + + /* + * Create the variable length auth_data. + */ + + init_rpc_auth_verifier(&auth_verifier, "NTLMSSP", NTLMSSP_AUTH); + + pwd_get_lm_nt_owf(pwd, lm_owf, nt_owf); + + init_rpc_auth_ntlmssp_resp(&ntlmssp_resp, + lm_owf, nt_owf, + domain, user_name, my_name, + ntlmssp_cli_flgs); + + /* + * Marshall the variable length auth_data into a temp parse_struct. + */ + + if(!smb_io_rpc_auth_verifier("auth_verifier", &auth_verifier, &auth_info, 0)) { + DEBUG(0,("create_rpc_bind_resp: failed to marshall RPC_AUTH_VERIFIER.\n")); + return False; + } + + if(!smb_io_rpc_auth_ntlmssp_resp("ntlmssp_resp", &ntlmssp_resp, &auth_info, 0)) { + DEBUG(0,("create_rpc_bind_resp: failed to marshall RPC_AUTH_NTLMSSP_RESP.\n")); + return False; + } + + /* Create the request RPC_HDR */ + init_rpc_hdr(&hdr, RPC_BINDRESP, 0x0, rpc_call_id, + RPC_HEADER_LEN + RPC_HDR_AUTHA_LEN + prs_offset(&auth_info), + prs_offset(&auth_info) ); + + /* Marshall it. */ + if(!smb_io_rpc_hdr("hdr", &hdr, rpc_out, 0)) { + DEBUG(0,("create_rpc_bind_resp: failed to marshall RPC_HDR.\n")); + return False; + } + + /* Create the request RPC_HDR_AUTHA */ + init_rpc_hdr_autha(&hdr_autha, MAX_PDU_FRAG_LEN, MAX_PDU_FRAG_LEN, + NTLMSSP_AUTH_TYPE, NTLMSSP_AUTH_LEVEL, 0x00); + + if(!smb_io_rpc_hdr_autha("hdr_autha", &hdr_autha, rpc_out, 0)) { + DEBUG(0,("create_rpc_bind_resp: failed to marshall RPC_HDR_AUTHA.\n")); + return False; + } + + /* + * Append the auth data to the outgoing buffer. + */ + + if(!prs_append_prs_data(rpc_out, &auth_info)) { + DEBUG(0,("create_rpc_bind_req: failed to grow parse struct to add auth.\n")); + return False; + } + + return True; +} + + +/******************************************************************* + Creates a DCE/RPC request. + ********************************************************************/ + +static uint32 create_rpc_request(prs_struct *rpc_out, uint8 op_num, int data_len, int auth_len, uint8 flags, uint32 oldid, uint32 data_left) +{ + uint32 alloc_hint; + RPC_HDR hdr; + RPC_HDR_REQ hdr_req; + uint32 callid = oldid ? oldid : get_rpc_call_id(); + + DEBUG(5,("create_rpc_request: opnum: 0x%x data_len: 0x%x\n", op_num, data_len)); + + /* create the rpc header RPC_HDR */ + init_rpc_hdr(&hdr, RPC_REQUEST, flags, + callid, data_len, auth_len); + + /* + * The alloc hint should be the amount of data, not including + * RPC headers & footers. + */ + + if (auth_len != 0) + alloc_hint = data_left - RPC_HEADER_LEN - RPC_HDR_AUTH_LEN - auth_len; + else + alloc_hint = data_left - RPC_HEADER_LEN; + + DEBUG(10,("create_rpc_request: data_len: %x auth_len: %x alloc_hint: %x\n", + data_len, auth_len, alloc_hint)); + + /* Create the rpc request RPC_HDR_REQ */ + init_rpc_hdr_req(&hdr_req, alloc_hint, op_num); + + /* stream-time... */ + if(!smb_io_rpc_hdr("hdr ", &hdr, rpc_out, 0)) + return 0; + + if(!smb_io_rpc_hdr_req("hdr_req", &hdr_req, rpc_out, 0)) + return 0; + + if (prs_offset(rpc_out) != RPC_HEADER_LEN + RPC_HDR_REQ_LEN) + return 0; + + return callid; +} + +/******************************************************************* + Puts an auth header into an rpc request. + ********************************************************************/ + +static BOOL create_auth_hdr(prs_struct *outgoing_packet, BOOL auth_verify) +{ + RPC_HDR_AUTH hdr_auth; + + init_rpc_hdr_auth(&hdr_auth, NTLMSSP_AUTH_TYPE, + NTLMSSP_AUTH_LEVEL, 0x08, + (auth_verify ? 1 : 0)); + if(!smb_io_rpc_hdr_auth("hdr_auth", &hdr_auth, + outgoing_packet, 0)) { + DEBUG(0,("create_auth_hdr:Failed to marshal RPC_HDR_AUTH.\n")); + return False; + } + return True; +} + +/******************************************************************* + Puts auth data into an rpc request. + ********************************************************************/ + +static BOOL create_auth_data(struct cli_state *cli, uint32 crc32, + prs_struct *outgoing_packet) +{ + char *pdata_out = prs_data_p(outgoing_packet); + RPC_AUTH_NTLMSSP_CHK chk; + uint32 current_offset = prs_offset(outgoing_packet); + + init_rpc_auth_ntlmssp_chk(&chk, NTLMSSP_SIGN_VERSION, + crc32, cli->ntlmssp_seq_num++); + if(!smb_io_rpc_auth_ntlmssp_chk("auth_sign", &chk, + outgoing_packet, 0)) { + DEBUG(0,("create_auth_data: Failed to marshal RPC_AUTH_NTLMSSP_CHK.\n")); + return False; + } + NTLMSSPcalc_ap(cli, (unsigned char*) + &pdata_out[current_offset+4], + RPC_AUTH_NTLMSSP_CHK_LEN - 4); + return True; +} + +/** + * Send a request on an RPC pipe and get a response. + * + * @param data NDR contents of the request to be sent. + * @param rdata Unparsed NDR response data. +**/ + +BOOL rpc_api_pipe_req(struct cli_state *cli, uint8 op_num, + prs_struct *data, prs_struct *rdata) +{ + uint32 auth_len, max_data, data_left, data_sent; + BOOL ret = False; + BOOL auth_verify, auth_seal; + fstring dump_name; + + auth_verify = ((cli->ntlmssp_srv_flgs & NTLMSSP_NEGOTIATE_SIGN) != 0); + auth_seal = ((cli->ntlmssp_srv_flgs & NTLMSSP_NEGOTIATE_SEAL) != 0); + + auth_len = (auth_verify ? RPC_AUTH_NTLMSSP_CHK_LEN : 0); + + /* + * calc how much actual data we can send in a PDU fragment + */ + max_data = cli->max_xmit_frag - RPC_HEADER_LEN - RPC_HDR_REQ_LEN - + (auth_verify ? RPC_HDR_AUTH_LEN : 0) - auth_len; + + for (data_left = prs_offset(data), data_sent = 0; data_left > 0;) { + prs_struct outgoing_packet; + uint32 data_len, send_size; + uint8 flags = 0; + uint32 crc32 = 0; + uint32 callid = 0; + + /* + * how much will we send this time + */ + send_size = MIN(data_left, max_data); + data_len = RPC_HEADER_LEN + RPC_HDR_REQ_LEN + send_size + + (auth_verify ? RPC_HDR_AUTH_LEN : 0) + auth_len; + + /* + * Malloc parse struct to hold it (and enough for alignments). + */ + if(!prs_init(&outgoing_packet, data_len + 8, + cli->mem_ctx, MARSHALL)) { + DEBUG(0,("rpc_api_pipe_req: Failed to malloc %u bytes.\n", (unsigned int)data_len )); + return False; + } + + if (data_left == prs_offset(data)) + flags |= RPC_FLG_FIRST; + + if (data_left < max_data) + flags |= RPC_FLG_LAST; + /* + * Write out the RPC header and the request header. + */ + if(!(callid = create_rpc_request(&outgoing_packet, op_num, + data_len, auth_len, flags, + callid, data_left))) { + DEBUG(0,("rpc_api_pipe_req: Failed to create RPC request.\n")); + prs_mem_free(&outgoing_packet); + return False; + } + + /* + * Seal the outgoing data if requested. + */ + if (auth_seal) { + crc32 = crc32_calc_buffer(prs_data_p(data) + data_sent, + send_size); + NTLMSSPcalc_ap(cli, (unsigned char*)prs_data_p(data) + + data_sent, send_size); + } + + /* + * Now copy the data into the outgoing packet. + */ + if(!prs_append_some_prs_data(&outgoing_packet, data, + data_sent, send_size)) { + DEBUG(0,("rpc_api_pipe_req: Failed to append data to outgoing packet.\n")); + prs_mem_free(&outgoing_packet); + return False; + } + + /* + * Add a trailing auth_verifier if needed. + */ + if (auth_seal || auth_verify) { + if(!create_auth_hdr(&outgoing_packet, auth_verify)) { + prs_mem_free(&outgoing_packet); + return False; + } + } + + /* + * Finally the auth data itself. + */ + if (auth_verify) { + if (!create_auth_data(cli, crc32, &outgoing_packet)) { + prs_mem_free(&outgoing_packet); + return False; + } + } + + DEBUG(100,("data_len: %x data_calc_len: %x\n", data_len, + prs_offset(&outgoing_packet))); + + if (flags & RPC_FLG_LAST) + ret = rpc_api_pipe(cli, &outgoing_packet, rdata); + else { + cli_write(cli, cli->nt_pipe_fnum, 0x0008, + prs_data_p(&outgoing_packet), + data_sent, data_len); + } + prs_mem_free(&outgoing_packet); + data_sent += send_size; + data_left -= send_size; + } + /* Also capture received data */ + slprintf(dump_name, sizeof(dump_name) - 1, "reply_%s", + cli_pipe_get_name(cli)); + prs_dump(dump_name, op_num, rdata); + + return ret; +} + +/**************************************************************************** + Set the handle state. +****************************************************************************/ + +static BOOL rpc_pipe_set_hnd_state(struct cli_state *cli, const char *pipe_name, uint16 device_state) +{ + BOOL state_set = False; + char param[2]; + uint16 setup[2]; /* only need 2 uint16 setup parameters */ + char *rparam = NULL; + char *rdata = NULL; + uint32 rparam_len, rdata_len; + + if (pipe_name == NULL) + return False; + + DEBUG(5,("Set Handle state Pipe[%x]: %s - device state:%x\n", + cli->nt_pipe_fnum, pipe_name, device_state)); + + /* create parameters: device state */ + SSVAL(param, 0, device_state); + + /* create setup parameters. */ + setup[0] = 0x0001; + setup[1] = cli->nt_pipe_fnum; /* pipe file handle. got this from an SMBOpenX. */ + + /* send the data on \PIPE\ */ + if (cli_api_pipe(cli, "\\PIPE\\", + setup, 2, 0, /* setup, length, max */ + param, 2, 0, /* param, length, max */ + NULL, 0, 1024, /* data, length, max */ + &rparam, &rparam_len, /* return param, length */ + &rdata, &rdata_len)) /* return data, length */ + { + DEBUG(5, ("Set Handle state: return OK\n")); + state_set = True; + } + + SAFE_FREE(rparam); + SAFE_FREE(rdata); + + return state_set; +} + +/**************************************************************************** + check the rpc bind acknowledge response +****************************************************************************/ + +int get_pipe_index( const char *pipe_name ) +{ + int pipe_idx = 0; + + while (pipe_names[pipe_idx].client_pipe != NULL) { + if (strequal(pipe_name, pipe_names[pipe_idx].client_pipe )) + return pipe_idx; + pipe_idx++; + }; + + return -1; +} + + +/**************************************************************************** + check the rpc bind acknowledge response +****************************************************************************/ + +const char* get_pipe_name_from_index( const int pipe_index ) +{ + + if ( (pipe_index < 0) || (pipe_index >= PI_MAX_PIPES) ) + return NULL; + + return pipe_names[pipe_index].client_pipe; +} + +/**************************************************************************** + Check to see if this pipe index points to one of + the pipes only supported by Win2k + ****************************************************************************/ + +BOOL is_win2k_pipe( const int pipe_idx ) +{ + switch ( pipe_idx ) + { + case PI_LSARPC_DS: + return True; + } + + return False; +} + +/**************************************************************************** + check the rpc bind acknowledge response +****************************************************************************/ + +static BOOL valid_pipe_name(const int pipe_idx, RPC_IFACE *abstract, RPC_IFACE *transfer) +{ + if ( pipe_idx >= PI_MAX_PIPES ) { + DEBUG(0,("valid_pipe_name: Programmer error! Invalid pipe index [%d]\n", + pipe_idx)); + return False; + } + + DEBUG(5,("Bind Abstract Syntax: ")); + dump_data(5, (char*)&(pipe_names[pipe_idx].abstr_syntax), + sizeof(pipe_names[pipe_idx].abstr_syntax)); + DEBUG(5,("Bind Transfer Syntax: ")); + dump_data(5, (char*)&(pipe_names[pipe_idx].trans_syntax), + sizeof(pipe_names[pipe_idx].trans_syntax)); + + /* copy the required syntaxes out so we can do the right bind */ + + *transfer = pipe_names[pipe_idx].trans_syntax; + *abstract = pipe_names[pipe_idx].abstr_syntax; + + return True; +} + +/**************************************************************************** + check the rpc bind acknowledge response +****************************************************************************/ + +static BOOL check_bind_response(RPC_HDR_BA *hdr_ba, const int pipe_idx, RPC_IFACE *transfer) +{ + int i = 0; + + if ( hdr_ba->addr.len <= 0) + return False; + + if ( !strequal(hdr_ba->addr.str, pipe_names[pipe_idx].server_pipe )) + { + DEBUG(4,("bind_rpc_pipe: pipe_name %s != expected pipe %s. oh well!\n", + pipe_names[i].server_pipe ,hdr_ba->addr.str)); + return False; + } + + DEBUG(5,("bind_rpc_pipe: server pipe_name found: %s\n", pipe_names[i].server_pipe )); + + if (pipe_names[pipe_idx].server_pipe == NULL) { + DEBUG(2,("bind_rpc_pipe: pipe name %s unsupported\n", hdr_ba->addr.str)); + return False; + } + + /* check the transfer syntax */ + if ((hdr_ba->transfer.version != transfer->version) || + (memcmp(&hdr_ba->transfer.uuid, &transfer->uuid, sizeof(transfer->uuid)) !=0)) { + DEBUG(2,("bind_rpc_pipe: transfer syntax differs\n")); + return False; + } + + /* lkclXXXX only accept one result: check the result(s) */ + if (hdr_ba->res.num_results != 0x1 || hdr_ba->res.result != 0) { + DEBUG(2,("bind_rpc_pipe: bind denied results: %d reason: %x\n", + hdr_ba->res.num_results, hdr_ba->res.reason)); + } + + DEBUG(5,("bind_rpc_pipe: accepted!\n")); + return True; +} + +/**************************************************************************** + Create and send the third packet in an RPC auth. +****************************************************************************/ + +static BOOL rpc_send_auth_reply(struct cli_state *cli, prs_struct *rdata, uint32 rpc_call_id) +{ + RPC_HDR_AUTH rhdr_auth; + RPC_AUTH_VERIFIER rhdr_verf; + RPC_AUTH_NTLMSSP_CHAL rhdr_chal; + char buffer[MAX_PDU_FRAG_LEN]; + prs_struct rpc_out; + ssize_t ret; + + unsigned char p24[24]; + unsigned char lm_owf[24]; + unsigned char lm_hash[16]; + + if(!smb_io_rpc_hdr_auth("", &rhdr_auth, rdata, 0)) { + DEBUG(0,("rpc_send_auth_reply: Failed to unmarshall RPC_HDR_AUTH.\n")); + return False; + } + if(!smb_io_rpc_auth_verifier("", &rhdr_verf, rdata, 0)) { + DEBUG(0,("rpc_send_auth_reply: Failed to unmarshall RPC_AUTH_VERIFIER.\n")); + return False; + } + if(!smb_io_rpc_auth_ntlmssp_chal("", &rhdr_chal, rdata, 0)) { + DEBUG(0,("rpc_send_auth_reply: Failed to unmarshall RPC_AUTH_NTLMSSP_CHAL.\n")); + return False; + } + + cli->ntlmssp_cli_flgs = rhdr_chal.neg_flags; + + pwd_make_lm_nt_owf(&cli->pwd, rhdr_chal.challenge); + + prs_init(&rpc_out, 0, cli->mem_ctx, MARSHALL); + + prs_give_memory( &rpc_out, buffer, sizeof(buffer), False); + + create_rpc_bind_resp(&cli->pwd, cli->domain, + cli->user_name, lp_netbios_name(), + cli->ntlmssp_cli_flgs, rpc_call_id, + &rpc_out); + + pwd_get_lm_nt_owf(&cli->pwd, lm_owf, NULL); + pwd_get_lm_nt_16(&cli->pwd, lm_hash, NULL); + + NTLMSSPOWFencrypt(lm_hash, lm_owf, p24); + + { + unsigned char j = 0; + int ind; + unsigned char k2[8]; + + memcpy(k2, p24, 5); + k2[5] = 0xe5; + k2[6] = 0x38; + k2[7] = 0xb0; + + for (ind = 0; ind < 256; ind++) + cli->ntlmssp_hash[ind] = (unsigned char)ind; + + for( ind = 0; ind < 256; ind++) { + unsigned char tc; + + j += (cli->ntlmssp_hash[ind] + k2[ind%8]); + + tc = cli->ntlmssp_hash[ind]; + cli->ntlmssp_hash[ind] = cli->ntlmssp_hash[j]; + cli->ntlmssp_hash[j] = tc; + } + + cli->ntlmssp_hash[256] = 0; + cli->ntlmssp_hash[257] = 0; + } + + memset((char *)lm_hash, '\0', sizeof(lm_hash)); + + if ((ret = cli_write(cli, cli->nt_pipe_fnum, 0x8, prs_data_p(&rpc_out), + 0, (size_t)prs_offset(&rpc_out))) != (ssize_t)prs_offset(&rpc_out)) { + DEBUG(0,("rpc_send_auth_reply: cli_write failed. Return was %d\n", (int)ret)); + return False; + } + + cli->ntlmssp_srv_flgs = rhdr_chal.neg_flags; + return True; +} + +/**************************************************************************** + Do an rpc bind. +****************************************************************************/ + +BOOL rpc_pipe_bind(struct cli_state *cli, int pipe_idx, const char *my_name) +{ + RPC_IFACE abstract; + RPC_IFACE transfer; + prs_struct rpc_out; + prs_struct rdata; + BOOL do_auth = (cli->ntlmssp_cli_flgs != 0); + uint32 rpc_call_id; + char buffer[MAX_PDU_FRAG_LEN]; + + if ( (pipe_idx < 0) || (pipe_idx >= PI_MAX_PIPES) ) + return False; + + DEBUG(5,("Bind RPC Pipe[%x]: %s\n", cli->nt_pipe_fnum, pipe_names[pipe_idx].client_pipe)); + + if (!valid_pipe_name(pipe_idx, &abstract, &transfer)) + return False; + + prs_init(&rpc_out, 0, cli->mem_ctx, MARSHALL); + + /* + * Use the MAX_PDU_FRAG_LEN buffer to store the bind request. + */ + + prs_give_memory( &rpc_out, buffer, sizeof(buffer), False); + + rpc_call_id = get_rpc_call_id(); + + /* Marshall the outgoing data. */ + create_rpc_bind_req(&rpc_out, do_auth, rpc_call_id, + &abstract, &transfer, + lp_netbios_name(), cli->domain, cli->ntlmssp_cli_flgs); + + /* Initialize the incoming data struct. */ + prs_init(&rdata, 0, cli->mem_ctx, UNMARSHALL); + + /* send data on \PIPE\. receive a response */ + if (rpc_api_pipe(cli, &rpc_out, &rdata)) { + RPC_HDR_BA hdr_ba; + + DEBUG(5, ("rpc_pipe_bind: rpc_api_pipe returned OK.\n")); + + if(!smb_io_rpc_hdr_ba("", &hdr_ba, &rdata, 0)) { + DEBUG(0,("rpc_pipe_bind: Failed to unmarshall RPC_HDR_BA.\n")); + prs_mem_free(&rdata); + return False; + } + + if(!check_bind_response(&hdr_ba, pipe_idx, &transfer)) { + DEBUG(2,("rpc_pipe_bind: check_bind_response failed.\n")); + prs_mem_free(&rdata); + return False; + } + + cli->max_xmit_frag = hdr_ba.bba.max_tsize; + cli->max_recv_frag = hdr_ba.bba.max_rsize; + + /* + * If we're doing NTLMSSP auth we need to send a reply to + * the bind-ack to complete the 3-way challenge response + * handshake. + */ + + if (do_auth && !rpc_send_auth_reply(cli, &rdata, rpc_call_id)) { + DEBUG(0,("rpc_pipe_bind: rpc_send_auth_reply failed.\n")); + prs_mem_free(&rdata); + return False; + } + } + + prs_mem_free(&rdata); + return True; +} + +/**************************************************************************** + Open a session. + ****************************************************************************/ + +BOOL cli_nt_session_open(struct cli_state *cli, const int pipe_idx) +{ + int fnum; + + /* At the moment we can't have more than one pipe open over + a cli connection. )-: */ + + SMB_ASSERT(cli->nt_pipe_fnum == 0); + + /* The pipe index must fall within our array */ + + SMB_ASSERT((pipe_idx >= 0) && (pipe_idx < PI_MAX_PIPES)); + + if (cli->capabilities & CAP_NT_SMBS) { + if ((fnum = cli_nt_create(cli, &pipe_names[pipe_idx].client_pipe[5], DESIRED_ACCESS_PIPE)) == -1) { + DEBUG(0,("cli_nt_session_open: cli_nt_create failed on pipe %s to machine %s. Error was %s\n", + &pipe_names[pipe_idx].client_pipe[5], cli->desthost, cli_errstr(cli))); + return False; + } + + cli->nt_pipe_fnum = (uint16)fnum; + } else { + if ((fnum = cli_open(cli, pipe_names[pipe_idx].client_pipe, O_CREAT|O_RDWR, DENY_NONE)) == -1) { + DEBUG(0,("cli_nt_session_open: cli_open failed on pipe %s to machine %s. Error was %s\n", + pipe_names[pipe_idx].client_pipe, cli->desthost, cli_errstr(cli))); + return False; + } + + cli->nt_pipe_fnum = (uint16)fnum; + + /**************** Set Named Pipe State ***************/ + if (!rpc_pipe_set_hnd_state(cli, pipe_names[pipe_idx].client_pipe, 0x4300)) { + DEBUG(0,("cli_nt_session_open: pipe hnd state failed. Error was %s\n", + cli_errstr(cli))); + cli_close(cli, cli->nt_pipe_fnum); + return False; + } + } + + /******************* bind request on pipe *****************/ + + if (!rpc_pipe_bind(cli, pipe_idx, lp_netbios_name())) { + DEBUG(2,("cli_nt_session_open: rpc bind to %s failed\n", + get_pipe_name_from_index(pipe_idx))); + cli_close(cli, cli->nt_pipe_fnum); + return False; + } + + /* + * Setup the remote server name prefixed by \ and the machine account name. + */ + + fstrcpy(cli->srv_name_slash, "\\\\"); + fstrcat(cli->srv_name_slash, cli->desthost); + strupper(cli->srv_name_slash); + + fstrcpy(cli->clnt_name_slash, "\\\\"); + fstrcat(cli->clnt_name_slash, lp_netbios_name()); + strupper(cli->clnt_name_slash); + + fstrcpy(cli->mach_acct, lp_netbios_name()); + fstrcat(cli->mach_acct, "$"); + strupper(cli->mach_acct); + + /* Remember which pipe we're talking to */ + fstrcpy(cli->pipe_name, pipe_names[pipe_idx].client_pipe); + + return True; +} + + +const char *cli_pipe_get_name(struct cli_state *cli) +{ + return cli->pipe_name; +} + + +/**************************************************************************** +close the session +****************************************************************************/ + +void cli_nt_session_close(struct cli_state *cli) +{ + cli_close(cli, cli->nt_pipe_fnum); + cli->nt_pipe_fnum = 0; +} |