/* Unix SMB/CIFS implementation. dcerpc utility functions Copyright (C) Andrew Tridgell 2003 Copyright (C) Jelmer Vernooij 2004 Copyright (C) Andrew Bartlett 2005 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" #include "librpc/gen_ndr/ndr_epmapper.h" #include "librpc/gen_ndr/ndr_dcerpc.h" #include "librpc/gen_ndr/ndr_misc.h" /* find a dcerpc call on an interface by name */ const struct dcerpc_interface_call *dcerpc_iface_find_call(const struct dcerpc_interface_table *iface, const char *name) { int i; for (i=0;inum_calls;i++) { if (strcmp(iface->calls[i].name, name) == 0) { return &iface->calls[i]; } } return NULL; } /* push a ncacn_packet into a blob, potentially with auth info */ NTSTATUS ncacn_push_auth(DATA_BLOB *blob, TALLOC_CTX *mem_ctx, struct ncacn_packet *pkt, struct dcerpc_auth *auth_info) { NTSTATUS status; struct ndr_push *ndr; ndr = ndr_push_init_ctx(mem_ctx); if (!ndr) { return NT_STATUS_NO_MEMORY; } if (!(pkt->drep[0] & DCERPC_DREP_LE)) { ndr->flags |= LIBNDR_FLAG_BIGENDIAN; } if (pkt->pfc_flags & DCERPC_PFC_FLAG_ORPC) { ndr->flags |= LIBNDR_FLAG_OBJECT_PRESENT; } if (auth_info) { pkt->auth_length = auth_info->credentials.length; } else { pkt->auth_length = 0; } status = ndr_push_ncacn_packet(ndr, NDR_SCALARS|NDR_BUFFERS, pkt); if (!NT_STATUS_IS_OK(status)) { return status; } if (auth_info) { status = ndr_push_dcerpc_auth(ndr, NDR_SCALARS|NDR_BUFFERS, auth_info); } *blob = ndr_push_blob(ndr); /* fill in the frag length */ dcerpc_set_frag_length(blob, blob->length); return NT_STATUS_OK; } #define MAX_PROTSEQ 10 static const struct { const char *name; enum dcerpc_transport_t transport; int num_protocols; enum epm_protocol protseq[MAX_PROTSEQ]; } transports[] = { { "ncacn_np", NCACN_NP, 3, { EPM_PROTOCOL_NCACN, EPM_PROTOCOL_SMB, EPM_PROTOCOL_NETBIOS }}, { "ncacn_ip_tcp", NCACN_IP_TCP, 3, { EPM_PROTOCOL_NCACN, EPM_PROTOCOL_TCP, EPM_PROTOCOL_IP } }, { "ncacn_http", NCACN_HTTP, 3, { EPM_PROTOCOL_NCACN, EPM_PROTOCOL_HTTP, EPM_PROTOCOL_IP } }, { "ncadg_ip_udp", NCACN_IP_UDP, 3, { EPM_PROTOCOL_NCADG, EPM_PROTOCOL_UDP, EPM_PROTOCOL_IP } }, { "ncalrpc", NCALRPC, 2, { EPM_PROTOCOL_NCALRPC, EPM_PROTOCOL_PIPE } }, { "ncacn_unix_stream", NCACN_UNIX_STREAM, 2, { EPM_PROTOCOL_NCACN, EPM_PROTOCOL_UNIX_DS } }, { "ncadg_unix_dgram", NCADG_UNIX_DGRAM, 2, { EPM_PROTOCOL_NCADG, EPM_PROTOCOL_UNIX_DS } }, { "ncacn_at_dsp", NCACN_AT_DSP, 3, { EPM_PROTOCOL_NCACN, EPM_PROTOCOL_APPLETALK, EPM_PROTOCOL_DSP } }, { "ncadg_at_ddp", NCADG_AT_DDP, 3, { EPM_PROTOCOL_NCADG, EPM_PROTOCOL_APPLETALK, EPM_PROTOCOL_DDP } }, { "ncacn_vns_ssp", NCACN_VNS_SPP, 3, { EPM_PROTOCOL_NCACN, EPM_PROTOCOL_STREETTALK, EPM_PROTOCOL_VINES_SPP } }, { "ncacn_vns_ipc", NCACN_VNS_IPC, 3, { EPM_PROTOCOL_NCACN, EPM_PROTOCOL_STREETTALK, EPM_PROTOCOL_VINES_IPC }, }, { "ncadg_ipx", NCADG_IPX, 2, { EPM_PROTOCOL_NCADG, EPM_PROTOCOL_IPX }, }, { "ncacn_spx", NCACN_SPX, 3, /* I guess some MS programmer confused the identifier for * EPM_PROTOCOL_UUID (0x0D or 13) with the one for * EPM_PROTOCOL_SPX (0x13) here. -- jelmer*/ { EPM_PROTOCOL_NCACN, EPM_PROTOCOL_NCALRPC, EPM_PROTOCOL_UUID }, }, }; static const struct { const char *name; uint32_t flag; } ncacn_options[] = { {"sign", DCERPC_SIGN}, {"seal", DCERPC_SEAL}, {"connect", DCERPC_CONNECT}, {"spnego", DCERPC_AUTH_SPNEGO}, {"krb5", DCERPC_AUTH_KRB5}, {"validate", DCERPC_DEBUG_VALIDATE_BOTH}, {"print", DCERPC_DEBUG_PRINT_BOTH}, {"padcheck", DCERPC_DEBUG_PAD_CHECK}, {"bigendian", DCERPC_PUSH_BIGENDIAN}, {"smb2", DCERPC_SMB2} }; const char *epm_floor_string(TALLOC_CTX *mem_ctx, struct epm_floor *epm_floor) { struct GUID uuid; uint16_t if_version; NTSTATUS status; switch(epm_floor->lhs.protocol) { case EPM_PROTOCOL_UUID: status = dcerpc_floor_get_lhs_data(epm_floor, &uuid, &if_version); if (NT_STATUS_IS_OK(status)) { /* lhs is used: UUID */ char *uuidstr; if (GUID_equal(&uuid, &ndr_transfer_syntax.uuid)) { return "NDR"; } if (GUID_equal(&uuid, &ndr64_transfer_syntax.uuid)) { return "NDR64"; } uuidstr = GUID_string(mem_ctx, &uuid); return talloc_asprintf(mem_ctx, " uuid %s/0x%02x", uuidstr, if_version); } else { /* IPX */ return talloc_asprintf(mem_ctx, "IPX:%s", data_blob_hex_string(mem_ctx, &epm_floor->rhs.uuid.unknown)); } case EPM_PROTOCOL_NCACN: return "RPC-C"; case EPM_PROTOCOL_NCADG: return "RPC"; case EPM_PROTOCOL_NCALRPC: return "NCALRPC"; case EPM_PROTOCOL_DNET_NSP: return "DNET/NSP"; case EPM_PROTOCOL_IP: return talloc_asprintf(mem_ctx, "IP:%s", epm_floor->rhs.ip.ipaddr); case EPM_PROTOCOL_PIPE: return talloc_asprintf(mem_ctx, "PIPE:%s", epm_floor->rhs.pipe.path); case EPM_PROTOCOL_SMB: return talloc_asprintf(mem_ctx, "SMB:%s", epm_floor->rhs.smb.unc); case EPM_PROTOCOL_UNIX_DS: return talloc_asprintf(mem_ctx, "Unix:%s", epm_floor->rhs.unix_ds.path); case EPM_PROTOCOL_NETBIOS: return talloc_asprintf(mem_ctx, "NetBIOS:%s", epm_floor->rhs.netbios.name); case EPM_PROTOCOL_NETBEUI: return "NETBeui"; case EPM_PROTOCOL_SPX: return "SPX"; case EPM_PROTOCOL_NB_IPX: return "NB_IPX"; case EPM_PROTOCOL_HTTP: return talloc_asprintf(mem_ctx, "HTTP:%d", epm_floor->rhs.http.port); case EPM_PROTOCOL_TCP: return talloc_asprintf(mem_ctx, "TCP:%d", epm_floor->rhs.tcp.port); case EPM_PROTOCOL_UDP: return talloc_asprintf(mem_ctx, "UDP:%d", epm_floor->rhs.udp.port); default: return talloc_asprintf(mem_ctx, "UNK(%02x):", epm_floor->lhs.protocol); } } /* form a binding string from a binding structure */ const char *dcerpc_binding_string(TALLOC_CTX *mem_ctx, const struct dcerpc_binding *b) { char *s = talloc_strdup(mem_ctx, ""); int i; const char *t_name=NULL; for (i=0;itransport) { t_name = transports[i].name; } } if (!t_name) { return NULL; } if (!GUID_all_zero(&b->object)) { s = talloc_asprintf(s, "%s@", GUID_string(mem_ctx, &b->object)); } s = talloc_asprintf_append(s, "%s:", t_name); if (!s) return NULL; if (b->host) { s = talloc_asprintf_append(s, "%s", b->host); } if (!b->endpoint && !b->options && !b->flags) { return s; } s = talloc_asprintf_append(s, "["); if (b->endpoint) { s = talloc_asprintf_append(s, "%s", b->endpoint); } /* this is a *really* inefficent way of dealing with strings, but this is rarely called and the strings are always short, so I don't care */ for (i=0;b->options && b->options[i];i++) { s = talloc_asprintf_append(s, ",%s", b->options[i]); if (!s) return NULL; } for (i=0;iflags & ncacn_options[i].flag) { s = talloc_asprintf_append(s, ",%s", ncacn_options[i].name); if (!s) return NULL; } } s = talloc_asprintf_append(s, "]"); return s; } /* parse a binding string into a dcerpc_binding structure */ NTSTATUS dcerpc_parse_binding(TALLOC_CTX *mem_ctx, const char *s, struct dcerpc_binding **b_out) { struct dcerpc_binding *b; char *options, *type; char *p; int i, j, comma_count; b = talloc(mem_ctx, struct dcerpc_binding); if (!b) { return NT_STATUS_NO_MEMORY; } p = strchr(s, '@'); if (p && PTR_DIFF(p, s) == 36) { /* 36 is the length of a UUID */ NTSTATUS status; status = GUID_from_string(s, &b->object); if (NT_STATUS_IS_ERR(status)) { DEBUG(0, ("Failed parsing UUID\n")); return status; } s = p + 1; } else { ZERO_STRUCT(b->object); } b->object_version = 0; p = strchr(s, ':'); if (!p) { return NT_STATUS_INVALID_PARAMETER; } type = talloc_strndup(mem_ctx, s, PTR_DIFF(p, s)); if (!type) { return NT_STATUS_NO_MEMORY; } for (i=0;itransport = transports[i].transport; break; } } if (i==ARRAY_SIZE(transports)) { DEBUG(0,("Unknown dcerpc transport '%s'\n", type)); return NT_STATUS_INVALID_PARAMETER; } s = p+1; p = strchr(s, '['); if (p) { b->host = talloc_strndup(b, s, PTR_DIFF(p, s)); options = talloc_strdup(mem_ctx, p+1); if (options[strlen(options)-1] != ']') { return NT_STATUS_INVALID_PARAMETER; } options[strlen(options)-1] = 0; } else { b->host = talloc_strdup(b, s); options = NULL; } if (!b->host) { return NT_STATUS_NO_MEMORY; } b->options = NULL; b->flags = 0; b->endpoint = NULL; if (!options) { *b_out = b; return NT_STATUS_OK; } comma_count = count_chars(options, ','); b->options = talloc_array(b, const char *, comma_count+2); if (!b->options) { return NT_STATUS_NO_MEMORY; } for (i=0; (p = strchr(options, ',')); i++) { b->options[i] = talloc_strndup(b, options, PTR_DIFF(p, options)); if (!b->options[i]) { return NT_STATUS_NO_MEMORY; } options = p+1; } b->options[i] = options; b->options[i+1] = NULL; /* some options are pre-parsed for convenience */ for (i=0;b->options[i];i++) { for (j=0;joptions[i]) == 0) { int k; b->flags |= ncacn_options[j].flag; for (k=i;b->options[k];k++) { b->options[k] = b->options[k+1]; } i--; break; } } } if (b->options[0]) { /* Endpoint is first option */ b->endpoint = b->options[0]; if (strlen(b->endpoint) == 0) b->endpoint = NULL; for (i=0;b->options[i];i++) { b->options[i] = b->options[i+1]; } } if (b->options[0] == NULL) b->options = NULL; *b_out = b; return NT_STATUS_OK; } NTSTATUS dcerpc_floor_get_lhs_data(struct epm_floor *epm_floor, struct GUID *uuid, uint16_t *if_version) { TALLOC_CTX *mem_ctx = talloc_init("floor_get_lhs_data"); struct ndr_pull *ndr = ndr_pull_init_blob(&epm_floor->lhs.lhs_data, mem_ctx); NTSTATUS status; ndr->flags |= LIBNDR_FLAG_NOALIGN; status = ndr_pull_GUID(ndr, NDR_SCALARS | NDR_BUFFERS, uuid); if (NT_STATUS_IS_ERR(status)) { talloc_free(mem_ctx); return status; } status = ndr_pull_uint16(ndr, NDR_SCALARS, if_version); talloc_free(mem_ctx); return status; } static DATA_BLOB dcerpc_floor_pack_lhs_data(TALLOC_CTX *mem_ctx, const struct GUID *uuid, uint32_t if_version) { struct ndr_push *ndr = ndr_push_init_ctx(mem_ctx); ndr->flags |= LIBNDR_FLAG_NOALIGN; ndr_push_GUID(ndr, NDR_SCALARS | NDR_BUFFERS, uuid); ndr_push_uint16(ndr, NDR_SCALARS, if_version); return ndr_push_blob(ndr); } const char *dcerpc_floor_get_rhs_data(TALLOC_CTX *mem_ctx, struct epm_floor *epm_floor) { switch (epm_floor->lhs.protocol) { case EPM_PROTOCOL_TCP: if (epm_floor->rhs.tcp.port == 0) return NULL; return talloc_asprintf(mem_ctx, "%d", epm_floor->rhs.tcp.port); case EPM_PROTOCOL_UDP: if (epm_floor->rhs.udp.port == 0) return NULL; return talloc_asprintf(mem_ctx, "%d", epm_floor->rhs.udp.port); case EPM_PROTOCOL_HTTP: if (epm_floor->rhs.http.port == 0) return NULL; return talloc_asprintf(mem_ctx, "%d", epm_floor->rhs.http.port); case EPM_PROTOCOL_IP: return talloc_strdup(mem_ctx, epm_floor->rhs.ip.ipaddr); case EPM_PROTOCOL_NCACN: return NULL; case EPM_PROTOCOL_NCADG: return NULL; case EPM_PROTOCOL_SMB: if (strlen(epm_floor->rhs.smb.unc) == 0) return NULL; return talloc_strdup(mem_ctx, epm_floor->rhs.smb.unc); case EPM_PROTOCOL_PIPE: if (strlen(epm_floor->rhs.pipe.path) == 0) return NULL; return talloc_strdup(mem_ctx, epm_floor->rhs.pipe.path); case EPM_PROTOCOL_NETBIOS: if (strlen(epm_floor->rhs.netbios.name) == 0) return NULL; return talloc_strdup(mem_ctx, epm_floor->rhs.netbios.name); case EPM_PROTOCOL_NCALRPC: return NULL; case EPM_PROTOCOL_VINES_SPP: return talloc_asprintf(mem_ctx, "%d", epm_floor->rhs.vines_spp.port); case EPM_PROTOCOL_VINES_IPC: return talloc_asprintf(mem_ctx, "%d", epm_floor->rhs.vines_ipc.port); case EPM_PROTOCOL_STREETTALK: return talloc_strdup(mem_ctx, epm_floor->rhs.streettalk.streettalk); case EPM_PROTOCOL_UNIX_DS: if (strlen(epm_floor->rhs.unix_ds.path) == 0) return NULL; return talloc_strdup(mem_ctx, epm_floor->rhs.unix_ds.path); case EPM_PROTOCOL_NULL: return NULL; default: DEBUG(0,("Unsupported lhs protocol %d\n", epm_floor->lhs.protocol)); break; } return NULL; } static NTSTATUS dcerpc_floor_set_rhs_data(TALLOC_CTX *mem_ctx, struct epm_floor *epm_floor, const char *data) { switch (epm_floor->lhs.protocol) { case EPM_PROTOCOL_TCP: epm_floor->rhs.tcp.port = atoi(data); return NT_STATUS_OK; case EPM_PROTOCOL_UDP: epm_floor->rhs.udp.port = atoi(data); return NT_STATUS_OK; case EPM_PROTOCOL_HTTP: epm_floor->rhs.http.port = atoi(data); return NT_STATUS_OK; case EPM_PROTOCOL_IP: epm_floor->rhs.ip.ipaddr = talloc_strdup(mem_ctx, data); NT_STATUS_HAVE_NO_MEMORY(epm_floor->rhs.ip.ipaddr); return NT_STATUS_OK; case EPM_PROTOCOL_NCACN: epm_floor->rhs.ncacn.minor_version = 0; return NT_STATUS_OK; case EPM_PROTOCOL_NCADG: epm_floor->rhs.ncadg.minor_version = 0; return NT_STATUS_OK; case EPM_PROTOCOL_SMB: epm_floor->rhs.smb.unc = talloc_strdup(mem_ctx, data); NT_STATUS_HAVE_NO_MEMORY(epm_floor->rhs.smb.unc); return NT_STATUS_OK; case EPM_PROTOCOL_PIPE: epm_floor->rhs.pipe.path = talloc_strdup(mem_ctx, data); NT_STATUS_HAVE_NO_MEMORY(epm_floor->rhs.pipe.path); return NT_STATUS_OK; case EPM_PROTOCOL_NETBIOS: epm_floor->rhs.netbios.name = talloc_strdup(mem_ctx, data); NT_STATUS_HAVE_NO_MEMORY(epm_floor->rhs.netbios.name); return NT_STATUS_OK; case EPM_PROTOCOL_NCALRPC: return NT_STATUS_OK; case EPM_PROTOCOL_VINES_SPP: epm_floor->rhs.vines_spp.port = atoi(data); return NT_STATUS_OK; case EPM_PROTOCOL_VINES_IPC: epm_floor->rhs.vines_ipc.port = atoi(data); return NT_STATUS_OK; case EPM_PROTOCOL_STREETTALK: epm_floor->rhs.streettalk.streettalk = talloc_strdup(mem_ctx, data); NT_STATUS_HAVE_NO_MEMORY(epm_floor->rhs.streettalk.streettalk); return NT_STATUS_OK; case EPM_PROTOCOL_UNIX_DS: epm_floor->rhs.unix_ds.path = talloc_strdup(mem_ctx, data); NT_STATUS_HAVE_NO_MEMORY(epm_floor->rhs.unix_ds.path); return NT_STATUS_OK; case EPM_PROTOCOL_NULL: return NT_STATUS_OK; default: DEBUG(0,("Unsupported lhs protocol %d\n", epm_floor->lhs.protocol)); break; } return NT_STATUS_NOT_SUPPORTED; } enum dcerpc_transport_t dcerpc_transport_by_endpoint_protocol(int prot) { int i; /* Find a transport that has 'prot' as 4th protocol */ for (i=0;i= 2 && transports[i].protseq[1] == prot) { return transports[i].transport; } } /* Unknown transport */ return -1; } enum dcerpc_transport_t dcerpc_transport_by_tower(struct epm_tower *tower) { int i; /* Find a transport that matches this tower */ for (i=0;inum_floors - 2) { continue; } for (j = 0; j < transports[i].num_protocols; j++) { if (transports[i].protseq[j] != tower->floors[j+2].lhs.protocol) { break; } } if (j == transports[i].num_protocols) { return transports[i].transport; } } /* Unknown transport */ return -1; } NTSTATUS dcerpc_binding_from_tower(TALLOC_CTX *mem_ctx, struct epm_tower *tower, struct dcerpc_binding **b_out) { NTSTATUS status; struct dcerpc_binding *binding; binding = talloc(mem_ctx, struct dcerpc_binding); NT_STATUS_HAVE_NO_MEMORY(binding); ZERO_STRUCT(binding->object); binding->options = NULL; binding->host = NULL; binding->flags = 0; binding->transport = dcerpc_transport_by_tower(tower); if (binding->transport == -1) { return NT_STATUS_NOT_SUPPORTED; } if (tower->num_floors < 1) { return NT_STATUS_OK; } /* Set object uuid */ status = dcerpc_floor_get_lhs_data(&tower->floors[0], &binding->object, &binding->object_version); if (!NT_STATUS_IS_OK(status)) { DEBUG(1, ("Error pulling object uuid and version: %s", nt_errstr(status))); return status; } /* Ignore floor 1, it contains the NDR version info */ binding->options = NULL; /* Set endpoint */ if (tower->num_floors >= 4) { binding->endpoint = dcerpc_floor_get_rhs_data(mem_ctx, &tower->floors[3]); } else { binding->endpoint = NULL; } /* Set network address */ if (tower->num_floors >= 5) { binding->host = dcerpc_floor_get_rhs_data(mem_ctx, &tower->floors[4]); } *b_out = binding; return NT_STATUS_OK; } NTSTATUS dcerpc_binding_build_tower(TALLOC_CTX *mem_ctx, struct dcerpc_binding *binding, struct epm_tower *tower) { const enum epm_protocol *protseq = NULL; int num_protocols = -1, i; NTSTATUS status; /* Find transport */ for (i=0;itransport) { protseq = transports[i].protseq; num_protocols = transports[i].num_protocols; break; } } if (num_protocols == -1) { DEBUG(0, ("Unable to find transport with id '%d'\n", binding->transport)); return NT_STATUS_UNSUCCESSFUL; } tower->num_floors = 2 + num_protocols; tower->floors = talloc_array(mem_ctx, struct epm_floor, tower->num_floors); /* Floor 0 */ tower->floors[0].lhs.protocol = EPM_PROTOCOL_UUID; tower->floors[0].lhs.lhs_data = dcerpc_floor_pack_lhs_data(mem_ctx, &binding->object, binding->object_version); tower->floors[0].rhs.uuid.unknown = data_blob_talloc_zero(mem_ctx, 2); /* Floor 1 */ tower->floors[1].lhs.protocol = EPM_PROTOCOL_UUID; tower->floors[1].lhs.lhs_data = dcerpc_floor_pack_lhs_data(mem_ctx, &ndr_transfer_syntax.uuid, ndr_transfer_syntax.if_version); tower->floors[1].rhs.uuid.unknown = data_blob_talloc_zero(mem_ctx, 2); /* Floor 2 to num_protocols */ for (i = 0; i < num_protocols; i++) { tower->floors[2 + i].lhs.protocol = protseq[i]; tower->floors[2 + i].lhs.lhs_data = data_blob_talloc(mem_ctx, NULL, 0); ZERO_STRUCT(tower->floors[2 + i].rhs); dcerpc_floor_set_rhs_data(mem_ctx, &tower->floors[2 + i], ""); } /* The 4th floor contains the endpoint */ if (num_protocols >= 2 && binding->endpoint) { status = dcerpc_floor_set_rhs_data(mem_ctx, &tower->floors[3], binding->endpoint); if (NT_STATUS_IS_ERR(status)) { return status; } } /* The 5th contains the network address */ if (num_protocols >= 3 && binding->host) { if (is_ipaddress(binding->host)) { status = dcerpc_floor_set_rhs_data(mem_ctx, &tower->floors[4], binding->host); } else { /* note that we don't attempt to resolve the name here - when we get a hostname here we are in the client code, and want to put in a wildcard all-zeros IP for the server to fill in */ status = dcerpc_floor_set_rhs_data(mem_ctx, &tower->floors[4], "0.0.0.0"); } if (NT_STATUS_IS_ERR(status)) { return status; } } return NT_STATUS_OK; } NTSTATUS dcerpc_epm_map_binding(TALLOC_CTX *mem_ctx, struct dcerpc_binding *binding, const struct dcerpc_interface_table *table, struct event_context *ev) { struct dcerpc_pipe *p; NTSTATUS status; struct epm_Map r; struct policy_handle handle; struct GUID guid; struct epm_twr_t twr, *twr_r; struct dcerpc_binding *epmapper_binding; int i; struct cli_credentials *anon_creds = cli_credentials_init(mem_ctx); cli_credentials_set_conf(anon_creds); cli_credentials_set_anonymous(anon_creds); /* First, check if there is a default endpoint specified in the IDL */ if (table) { struct dcerpc_binding *default_binding; /* Find one of the default pipes for this interface */ for (i = 0; i < table->endpoints->count; i++) { status = dcerpc_parse_binding(mem_ctx, table->endpoints->names[i], &default_binding); if (NT_STATUS_IS_OK(status)) { if (default_binding->transport == binding->transport && default_binding->endpoint) { binding->endpoint = talloc_reference(binding, default_binding->endpoint); talloc_free(default_binding); return NT_STATUS_OK; } else { talloc_free(default_binding); } } } } epmapper_binding = talloc_zero(mem_ctx, struct dcerpc_binding); if (!epmapper_binding) { return NT_STATUS_NO_MEMORY; } epmapper_binding->transport = binding->transport; epmapper_binding->host = talloc_reference(epmapper_binding, binding->host); epmapper_binding->options = NULL; epmapper_binding->flags = 0; epmapper_binding->endpoint = NULL; status = dcerpc_pipe_connect_b(mem_ctx, &p, epmapper_binding, &dcerpc_table_epmapper, anon_creds, ev); if (!NT_STATUS_IS_OK(status)) { return status; } ZERO_STRUCT(handle); ZERO_STRUCT(guid); binding->object = table->uuid; binding->object_version = table->if_version; status = dcerpc_binding_build_tower(p, binding, &twr.tower); if (NT_STATUS_IS_ERR(status)) { return status; } /* with some nice pretty paper around it of course */ r.in.object = &guid; r.in.map_tower = &twr; r.in.entry_handle = &handle; r.in.max_towers = 1; r.out.entry_handle = &handle; status = dcerpc_epm_Map(p, p, &r); if (!NT_STATUS_IS_OK(status)) { talloc_free(p); return status; } if (r.out.result != 0 || r.out.num_towers != 1) { talloc_free(p); return NT_STATUS_PORT_UNREACHABLE; } twr_r = r.out.towers[0].twr; if (!twr_r) { talloc_free(p); return NT_STATUS_PORT_UNREACHABLE; } if (twr_r->tower.num_floors != twr.tower.num_floors || twr_r->tower.floors[3].lhs.protocol != twr.tower.floors[3].lhs.protocol) { talloc_free(p); return NT_STATUS_PORT_UNREACHABLE; } binding->endpoint = talloc_reference(binding, dcerpc_floor_get_rhs_data(mem_ctx, &twr_r->tower.floors[3])); talloc_free(p); return NT_STATUS_OK; } /* perform an authenticated bind if needed */ NTSTATUS dcerpc_pipe_auth(struct dcerpc_pipe *p, struct dcerpc_binding *binding, const struct dcerpc_interface_table *table, struct cli_credentials *credentials) { NTSTATUS status; TALLOC_CTX *tmp_ctx; tmp_ctx = talloc_new(p); p->conn->flags = binding->flags; /* remember the binding string for possible secondary connections */ p->conn->binding_string = dcerpc_binding_string(p, binding); if (!cli_credentials_is_anonymous(credentials) && (binding->flags & DCERPC_SCHANNEL) && !cli_credentials_get_netlogon_creds(credentials)) { /* If we don't already have netlogon credentials for * the schannel bind, then we have to get these * first */ status = dcerpc_bind_auth_schannel(tmp_ctx, p, table, credentials, dcerpc_auth_level(p->conn)); } else if (!cli_credentials_is_anonymous(credentials) && !(p->conn->transport.transport == NCACN_NP && !(binding->flags & DCERPC_SIGN) && !(binding->flags & DCERPC_SEAL))) { /* Perform an authenticated DCE-RPC bind, except where * we ask for a connection on NCACN_NP, and that * connection is not signed or sealed. For that case * we rely on the already authenicated CIFS connection */ uint8_t auth_type; if ((p->conn->flags & (DCERPC_SIGN|DCERPC_SEAL)) == 0) { /* we are doing an authenticated connection, but not using sign or seal. We must force the CONNECT dcerpc auth type as a NONE auth type doesn't allow authentication information to be passed. */ p->conn->flags |= DCERPC_CONNECT; } if (binding->flags & DCERPC_AUTH_SPNEGO) { auth_type = DCERPC_AUTH_TYPE_SPNEGO; } else if (binding->flags & DCERPC_AUTH_KRB5) { auth_type = DCERPC_AUTH_TYPE_KRB5; } else if (binding->flags & DCERPC_SCHANNEL) { auth_type = DCERPC_AUTH_TYPE_SCHANNEL; } else { auth_type = DCERPC_AUTH_TYPE_NTLMSSP; } status = dcerpc_bind_auth(p, table, credentials, auth_type, dcerpc_auth_level(p->conn), table->authservices->names[0]); } else { status = dcerpc_bind_auth_none(p, table); } if (!NT_STATUS_IS_OK(status)) { char *uuid_str = GUID_string(p, &table->uuid); DEBUG(0,("Failed to bind to uuid %s - %s\n", uuid_str, nt_errstr(status))); talloc_free(uuid_str); } talloc_free(tmp_ctx); return status; } /* open a rpc connection to a rpc pipe on SMB using the binding structure to determine the endpoint and options */ static NTSTATUS dcerpc_pipe_connect_ncacn_np(TALLOC_CTX *tmp_ctx, struct dcerpc_pipe_connect *io) { if (io->binding->flags & DCERPC_SMB2) { return dcerpc_pipe_connect_ncacn_np_smb2(tmp_ctx, io); } return dcerpc_pipe_connect_ncacn_np_smb(tmp_ctx, io); } /* open a rpc connection to a rpc pipe on SMP using the binding structure to determine the endpoint and options */ static NTSTATUS dcerpc_pipe_connect_ncalrpc(TALLOC_CTX *tmp_ctx, struct dcerpc_pipe *p, struct dcerpc_binding *binding, const struct dcerpc_interface_table *table) { NTSTATUS status; status = dcerpc_pipe_open_pipe(p->conn, binding->endpoint); if (!NT_STATUS_IS_OK(status)) { DEBUG(0,("Failed to open ncalrpc pipe '%s' - %s\n", binding->endpoint, nt_errstr(status))); return status; } return status; } /* open a rpc connection to a rpc pipe on SMP using the binding structure to determine the endpoint and options */ static NTSTATUS dcerpc_pipe_connect_ncacn_unix_stream(TALLOC_CTX *tmp_ctx, struct dcerpc_pipe *p, struct dcerpc_binding *binding, const struct dcerpc_interface_table *table) { NTSTATUS status; if (!binding->endpoint) { DEBUG(0, ("Path to unix socket not specified\n")); return NT_STATUS_INVALID_PARAMETER; } status = dcerpc_pipe_open_unix_stream(p->conn, binding->endpoint); if (!NT_STATUS_IS_OK(status)) { DEBUG(0,("Failed to open unix socket %s - %s\n", binding->endpoint, nt_errstr(status))); talloc_free(p); return status; } return status; } /* open a rpc connection to a rpc pipe on TCP/IP sockets using the binding structure to determine the endpoint and options */ static NTSTATUS dcerpc_pipe_connect_ncacn_ip_tcp(TALLOC_CTX *tmp_ctx, struct dcerpc_pipe *p, struct dcerpc_binding *binding, const struct dcerpc_interface_table *table) { NTSTATUS status; uint32_t port = 0; port = atoi(binding->endpoint); status = dcerpc_pipe_open_tcp(p->conn, binding->host, port); if (!NT_STATUS_IS_OK(status)) { DEBUG(0,("Failed to connect to %s:%d - %s\n", binding->host, port, nt_errstr(status))); return status; } return status; } /* open a rpc connection to a rpc pipe, using the specified binding structure to determine the endpoint and options */ NTSTATUS dcerpc_pipe_connect_b(TALLOC_CTX *parent_ctx, struct dcerpc_pipe **pp, struct dcerpc_binding *binding, const struct dcerpc_interface_table *table, struct cli_credentials *credentials, struct event_context *ev) { NTSTATUS status = NT_STATUS_INVALID_PARAMETER; struct dcerpc_pipe *p; struct dcerpc_pipe_connect pc; TALLOC_CTX *tmp_ctx; (*pp) = NULL; p = dcerpc_pipe_init(parent_ctx, ev); if (p == NULL) { return NT_STATUS_NO_MEMORY; } tmp_ctx = talloc_named(p, 0, "dcerpc_pipe_connect_b tmp_ctx"); switch (binding->transport) { case NCACN_NP: case NCACN_IP_TCP: case NCALRPC: if (!binding->endpoint) { status = dcerpc_epm_map_binding(tmp_ctx, binding, table, p->conn->event_ctx); if (!NT_STATUS_IS_OK(status)) { DEBUG(0,("Failed to map DCERPC endpoint for '%s' - %s\n", GUID_string(tmp_ctx, &table->uuid), nt_errstr(status))); talloc_free(tmp_ctx); return status; } DEBUG(2,("Mapped to DCERPC endpoint %s\n", binding->endpoint)); } break; /* Fall through to next switch statement */ default: break; } pc.pipe = p; pc.binding = binding; pc.interface = table; pc.creds = credentials; switch (binding->transport) { case NCACN_NP: status = dcerpc_pipe_connect_ncacn_np(tmp_ctx, &pc); break; case NCACN_IP_TCP: status = dcerpc_pipe_connect_ncacn_ip_tcp(tmp_ctx, p, binding, table); break; case NCACN_UNIX_STREAM: status = dcerpc_pipe_connect_ncacn_unix_stream(tmp_ctx, p, binding, table); break; case NCALRPC: status = dcerpc_pipe_connect_ncalrpc(tmp_ctx, p, binding, table); break; default: return NT_STATUS_NOT_SUPPORTED; } if (!NT_STATUS_IS_OK(status)) { talloc_free(p); return status; } p->binding = binding; if (!talloc_reference(p, binding)) { return NT_STATUS_NO_MEMORY; } status = dcerpc_pipe_auth(p, binding, table, credentials); if (!NT_STATUS_IS_OK(status)) { talloc_free(p); return status; } *pp = p; talloc_free(tmp_ctx); return status; } /* open a rpc connection to a rpc pipe, using the specified string binding to determine the endpoint and options */ NTSTATUS dcerpc_pipe_connect(TALLOC_CTX *parent_ctx, struct dcerpc_pipe **pp, const char *binding, const struct dcerpc_interface_table *table, struct cli_credentials *credentials, struct event_context *ev) { struct dcerpc_binding *b; NTSTATUS status; TALLOC_CTX *tmp_ctx; tmp_ctx = talloc_named(parent_ctx, 0, "dcerpc_pipe_connect tmp_ctx"); if (!tmp_ctx) { return NT_STATUS_NO_MEMORY; } status = dcerpc_parse_binding(tmp_ctx, binding, &b); if (!NT_STATUS_IS_OK(status)) { DEBUG(0,("Failed to parse dcerpc binding '%s'\n", binding)); talloc_free(tmp_ctx); return status; } DEBUG(3,("Using binding %s\n", dcerpc_binding_string(tmp_ctx, b))); status = dcerpc_pipe_connect_b(tmp_ctx, pp, b, table, credentials, ev); if (NT_STATUS_IS_OK(status)) { *pp = talloc_steal(parent_ctx, *pp); } talloc_free(tmp_ctx); return status; } /* create a secondary dcerpc connection from a primary connection if the primary is a SMB connection then the secondary connection will be on the same SMB connection, but use a new fnum */ NTSTATUS dcerpc_secondary_connection(struct dcerpc_pipe *p, struct dcerpc_pipe **p2, struct dcerpc_binding *b) { struct smbcli_tree *tree; NTSTATUS status = NT_STATUS_INVALID_PARAMETER; (*p2) = dcerpc_pipe_init(p, p->conn->event_ctx); if (*p2 == NULL) { return NT_STATUS_NO_MEMORY; } switch (p->conn->transport.transport) { case NCACN_NP: tree = dcerpc_smb_tree(p->conn); if (!tree) { return NT_STATUS_INVALID_PARAMETER; } status = dcerpc_pipe_open_smb((*p2)->conn, tree, b->endpoint); break; case NCACN_IP_TCP: status = dcerpc_pipe_open_tcp((*p2)->conn, b->host, atoi(b->endpoint)); break; case NCALRPC: status = dcerpc_pipe_open_pipe((*p2)->conn, b->endpoint); break; default: return NT_STATUS_NOT_SUPPORTED; } if (!NT_STATUS_IS_OK(status)) { talloc_free(*p2); return status; } (*p2)->conn->flags = p->conn->flags; (*p2)->binding = b; if (!talloc_reference(*p2, b)) { return NT_STATUS_NO_MEMORY; } return NT_STATUS_OK; } NTSTATUS dcerpc_generic_session_key(struct dcerpc_connection *c, DATA_BLOB *session_key) { /* this took quite a few CPU cycles to find ... */ session_key->data = discard_const_p(unsigned char, "SystemLibraryDTC"); session_key->length = 16; return NT_STATUS_OK; } /* fetch the user session key - may be default (above) or the SMB session key */ NTSTATUS dcerpc_fetch_session_key(struct dcerpc_pipe *p, DATA_BLOB *session_key) { return p->conn->security_state.session_key(p->conn, session_key); } /* log a rpc packet in a format suitable for ndrdump. This is especially useful for sealed packets, where ethereal cannot easily see the contents this triggers on a debug level of >= 10 */ void dcerpc_log_packet(const struct dcerpc_interface_table *ndr, uint32_t opnum, uint32_t flags, DATA_BLOB *pkt) { const int num_examples = 20; int i; if (DEBUGLEVEL < 10) return; for (i=0;iname, opnum, i, (flags&NDR_IN)?"in":"out"); if (name == NULL) { return; } if (!file_exist(name)) { if (file_save(name, pkt->data, pkt->length)) { DEBUG(10,("Logged rpc packet to %s\n", name)); } free(name); break; } free(name); } } /* create a secondary context from a primary connection this uses dcerpc_alter_context() to create a new dcerpc context_id */ NTSTATUS dcerpc_secondary_context(struct dcerpc_pipe *p, struct dcerpc_pipe **pp2, const struct dcerpc_interface_table *table) { NTSTATUS status; struct dcerpc_pipe *p2; p2 = talloc_zero(p, struct dcerpc_pipe); if (p2 == NULL) { return NT_STATUS_NO_MEMORY; } p2->conn = talloc_reference(p2, p->conn); p2->request_timeout = p->request_timeout; p2->context_id = ++p->conn->next_context_id; p2->syntax.uuid = table->uuid; p2->syntax.if_version = table->if_version; p2->transfer_syntax = ndr_transfer_syntax; status = dcerpc_alter_context(p2, p2, &p2->syntax, &p2->transfer_syntax); if (!NT_STATUS_IS_OK(status)) { talloc_free(p2); return status; } *pp2 = p2; return status; }