/* Unix SMB/CIFS implementation. dcerpc utility functions Copyright (C) Andrew Tridgell 2003 Copyright (C) Jelmer Vernooij 2004 Copyright (C) Andrew Bartlett 2005 Copyright (C) Rafal Szczesniak 2006 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 "lib/events/events.h" #include "libcli/composite/composite.h" #include "librpc/gen_ndr/ndr_epmapper_c.h" #include "librpc/gen_ndr/ndr_dcerpc.h" #include "librpc/gen_ndr/ndr_misc.h" #include "auth/credentials/credentials.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_OBJECT_UUID) { 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}, {"ntlm", DCERPC_AUTH_NTLM}, {"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 dcerpc_syntax_id syntax; NTSTATUS status; switch(epm_floor->lhs.protocol) { case EPM_PROTOCOL_UUID: status = dcerpc_floor_get_lhs_data(epm_floor, &syntax); if (NT_STATUS_IS_OK(status)) { /* lhs is used: UUID */ char *uuidstr; if (GUID_equal(&syntax.uuid, &ndr_transfer_syntax.uuid)) { return "NDR"; } if (GUID_equal(&syntax.uuid, &ndr64_transfer_syntax.uuid)) { return "NDR64"; } uuidstr = GUID_string(mem_ctx, &syntax.uuid); return talloc_asprintf(mem_ctx, " uuid %s/0x%02x", uuidstr, syntax.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 */ 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.uuid)) { s = talloc_asprintf(s, "%s@", GUID_string(mem_ctx, &b->object.uuid)); } 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.uuid); if (NT_STATUS_IS_ERR(status)) { DEBUG(0, ("Failed parsing UUID\n")); return status; } s = p + 1; } else { ZERO_STRUCT(b->object); } b->object.if_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->target_hostname = b->host; b->options = NULL; b->flags = 0; b->assoc_group_id = 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 dcerpc_syntax_id *syntax) { 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; uint16_t if_version=0; ndr->flags |= LIBNDR_FLAG_NOALIGN; status = ndr_pull_GUID(ndr, NDR_SCALARS | NDR_BUFFERS, &syntax->uuid); if (NT_STATUS_IS_ERR(status)) { talloc_free(mem_ctx); return status; } status = ndr_pull_uint16(ndr, NDR_SCALARS, &if_version); syntax->if_version = if_version; talloc_free(mem_ctx); return status; } static DATA_BLOB dcerpc_floor_pack_lhs_data(TALLOC_CTX *mem_ctx, const struct dcerpc_syntax_id *syntax) { struct ndr_push *ndr = ndr_push_init_ctx(mem_ctx); ndr->flags |= LIBNDR_FLAG_NOALIGN; ndr_push_GUID(ndr, NDR_SCALARS | NDR_BUFFERS, &syntax->uuid); ndr_push_uint16(ndr, NDR_SCALARS, syntax->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 (unsigned int)-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 (unsigned int)-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->target_hostname = NULL; binding->flags = 0; binding->assoc_group_id = 0; binding->transport = dcerpc_transport_by_tower(tower); if (binding->transport == (unsigned int)-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); 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]); NT_STATUS_HAVE_NO_MEMORY(binding->host); binding->target_hostname = binding->host; } *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); 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); 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; } struct epm_map_binding_state { struct dcerpc_binding *binding; const struct dcerpc_interface_table *table; struct dcerpc_pipe *pipe; struct policy_handle handle; struct GUID guid; struct epm_twr_t twr; struct epm_twr_t *twr_r; struct epm_Map r; }; static void continue_epm_recv_binding(struct composite_context *ctx); static void continue_epm_map(struct rpc_request *req); /* Stage 2 of epm_map_binding: Receive connected rpc pipe and send endpoint mapping rpc request */ static void continue_epm_recv_binding(struct composite_context *ctx) { struct rpc_request *map_req; struct composite_context *c = talloc_get_type(ctx->async.private_data, struct composite_context); struct epm_map_binding_state *s = talloc_get_type(c->private_data, struct epm_map_binding_state); /* receive result of rpc pipe connect request */ c->status = dcerpc_pipe_connect_b_recv(ctx, c, &s->pipe); if (!composite_is_ok(c)) return; s->pipe->conn->flags |= DCERPC_NDR_REF_ALLOC; /* prepare requested binding parameters */ s->binding->object = s->table->syntax_id; c->status = dcerpc_binding_build_tower(s->pipe, s->binding, &s->twr.tower); if (!composite_is_ok(c)) return; /* with some nice pretty paper around it of course */ s->r.in.object = &s->guid; s->r.in.map_tower = &s->twr; s->r.in.entry_handle = &s->handle; s->r.in.max_towers = 1; s->r.out.entry_handle = &s->handle; /* send request for an endpoint mapping - a rpc request on connected pipe */ map_req = dcerpc_epm_Map_send(s->pipe, c, &s->r); if (composite_nomem(map_req, c)) return; composite_continue_rpc(c, map_req, continue_epm_map, c); } /* Stage 3 of epm_map_binding: Receive endpoint mapping and provide binding details */ static void continue_epm_map(struct rpc_request *req) { struct composite_context *c = talloc_get_type(req->async.private_data, struct composite_context); struct epm_map_binding_state *s = talloc_get_type(c->private_data, struct epm_map_binding_state); /* receive result of a rpc request */ c->status = dcerpc_ndr_request_recv(req); if (!composite_is_ok(c)) return; /* check the details */ if (s->r.out.result != 0 || *s->r.out.num_towers != 1) { composite_error(c, NT_STATUS_PORT_UNREACHABLE); return; } s->twr_r = s->r.out.towers[0].twr; if (s->twr_r == NULL) { composite_error(c, NT_STATUS_PORT_UNREACHABLE); return; } if (s->twr_r->tower.num_floors != s->twr.tower.num_floors || s->twr_r->tower.floors[3].lhs.protocol != s->twr.tower.floors[3].lhs.protocol) { composite_error(c, NT_STATUS_PORT_UNREACHABLE); return; } /* get received endpoint */ s->binding->endpoint = talloc_reference(s->binding, dcerpc_floor_get_rhs_data(c, &s->twr_r->tower.floors[3])); if (composite_nomem(s->binding->endpoint, c)) return; composite_done(c); } /* Request for endpoint mapping of dcerpc binding - try to request for endpoint unless there is default one. */ struct composite_context *dcerpc_epm_map_binding_send(TALLOC_CTX *mem_ctx, struct dcerpc_binding *binding, const struct dcerpc_interface_table *table, struct event_context *ev) { struct composite_context *c; struct epm_map_binding_state *s; struct composite_context *pipe_connect_req; struct cli_credentials *anon_creds; struct event_context *new_ev = NULL; NTSTATUS status; struct dcerpc_binding *epmapper_binding; int i; /* Try to find event context in memory context in case passed * event_context (argument) was NULL. If there's none, just * create a new one. */ if (ev == NULL) { ev = event_context_find(mem_ctx); if (ev == NULL) { new_ev = event_context_init(mem_ctx); if (new_ev == NULL) return NULL; ev = new_ev; } } /* composite context allocation and setup */ c = composite_create(mem_ctx, ev); if (c == NULL) { talloc_free(new_ev); return NULL; } talloc_steal(c, new_ev); s = talloc_zero(c, struct epm_map_binding_state); if (composite_nomem(s, c)) return c; c->private_data = s; s->binding = binding; s->table = table; /* anonymous credentials for rpc connection used to get endpoint mapping */ 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); composite_done(c); return c; } else { talloc_free(default_binding); } } } } epmapper_binding = talloc_zero(c, struct dcerpc_binding); if (composite_nomem(epmapper_binding, c)) return c; /* basic endpoint mapping data */ epmapper_binding->transport = binding->transport; epmapper_binding->host = talloc_reference(epmapper_binding, binding->host); epmapper_binding->target_hostname = epmapper_binding->host; epmapper_binding->options = NULL; epmapper_binding->flags = 0; epmapper_binding->assoc_group_id = 0; epmapper_binding->endpoint = NULL; /* initiate rpc pipe connection */ pipe_connect_req = dcerpc_pipe_connect_b_send(c, epmapper_binding, &dcerpc_table_epmapper, anon_creds, c->event_ctx); if (composite_nomem(pipe_connect_req, c)) return c; composite_continue(c, pipe_connect_req, continue_epm_recv_binding, c); return c; } /* Receive result of endpoint mapping request */ NTSTATUS dcerpc_epm_map_binding_recv(struct composite_context *c) { NTSTATUS status = composite_wait(c); talloc_free(c); return status; } /* Get endpoint mapping for rpc connection */ NTSTATUS dcerpc_epm_map_binding(TALLOC_CTX *mem_ctx, struct dcerpc_binding *binding, const struct dcerpc_interface_table *table, struct event_context *ev) { struct composite_context *c; c = dcerpc_epm_map_binding_send(mem_ctx, binding, table, ev); return dcerpc_epm_map_binding_recv(c); } struct pipe_auth_state { struct dcerpc_pipe *pipe; struct dcerpc_binding *binding; const struct dcerpc_interface_table *table; struct cli_credentials *credentials; }; static void continue_auth_schannel(struct composite_context *ctx); static void continue_auth(struct composite_context *ctx); static void continue_auth_none(struct composite_context *ctx); static void continue_ntlmssp_connection(struct composite_context *ctx); static void continue_spnego_after_wrong_pass(struct composite_context *ctx); /* Stage 2 of pipe_auth: Receive result of schannel bind request */ static void continue_auth_schannel(struct composite_context *ctx) { struct composite_context *c = talloc_get_type(ctx->async.private_data, struct composite_context); c->status = dcerpc_bind_auth_schannel_recv(ctx); if (!composite_is_ok(c)) return; composite_done(c); } /* Stage 2 of pipe_auth: Receive result of authenticated bind request */ static void continue_auth(struct composite_context *ctx) { struct composite_context *c = talloc_get_type(ctx->async.private_data, struct composite_context); c->status = dcerpc_bind_auth_recv(ctx); if (!composite_is_ok(c)) return; composite_done(c); } /* Stage 2 of pipe_auth: Receive result of authenticated bind request, but handle fallbacks: SPNEGO -> NTLMSSP */ static void continue_auth_auto(struct composite_context *ctx) { struct composite_context *c = talloc_get_type(ctx->async.private_data, struct composite_context); struct pipe_auth_state *s = talloc_get_type(c->private_data, struct pipe_auth_state); struct composite_context *sec_conn_req; c->status = dcerpc_bind_auth_recv(ctx); if (NT_STATUS_EQUAL(c->status, NT_STATUS_INVALID_PARAMETER)) { /* * Retry with NTLMSSP auth as fallback * send a request for secondary rpc connection */ sec_conn_req = dcerpc_secondary_connection_send(s->pipe, s->binding); composite_continue(c, sec_conn_req, continue_ntlmssp_connection, c); return; } else if (NT_STATUS_EQUAL(c->status, NT_STATUS_LOGON_FAILURE)) { if (cli_credentials_wrong_password(s->credentials)) { /* * Retry SPNEGO with a better password * send a request for secondary rpc connection */ sec_conn_req = dcerpc_secondary_connection_send(s->pipe, s->binding); composite_continue(c, sec_conn_req, continue_spnego_after_wrong_pass, c); return; } } if (!composite_is_ok(c)) return; composite_done(c); } /* Stage 3 of pipe_auth (fallback to NTLMSSP case): Receive secondary rpc connection (the first one can't be used any more, due to the bind nak) and perform authenticated bind request */ static void continue_ntlmssp_connection(struct composite_context *ctx) { struct composite_context *c; struct pipe_auth_state *s; struct composite_context *auth_req; struct dcerpc_pipe *p2; c = talloc_get_type(ctx->async.private_data, struct composite_context); s = talloc_get_type(c->private_data, struct pipe_auth_state); /* receive secondary rpc connection */ c->status = dcerpc_secondary_connection_recv(ctx, &p2); if (!composite_is_ok(c)) return; talloc_steal(s, p2); talloc_steal(p2, s->pipe); s->pipe = p2; /* initiate a authenticated bind */ auth_req = dcerpc_bind_auth_send(c, s->pipe, s->table, s->credentials, DCERPC_AUTH_TYPE_NTLMSSP, dcerpc_auth_level(s->pipe->conn), s->table->authservices->names[0]); composite_continue(c, auth_req, continue_auth, c); } /* Stage 3 of pipe_auth (retry on wrong password): Receive secondary rpc connection (the first one can't be used any more, due to the bind nak) and perform authenticated bind request */ static void continue_spnego_after_wrong_pass(struct composite_context *ctx) { struct composite_context *c; struct pipe_auth_state *s; struct composite_context *auth_req; struct dcerpc_pipe *p2; c = talloc_get_type(ctx->async.private_data, struct composite_context); s = talloc_get_type(c->private_data, struct pipe_auth_state); /* receive secondary rpc connection */ c->status = dcerpc_secondary_connection_recv(ctx, &p2); if (!composite_is_ok(c)) return; talloc_steal(s, p2); talloc_steal(p2, s->pipe); s->pipe = p2; /* initiate a authenticated bind */ auth_req = dcerpc_bind_auth_send(c, s->pipe, s->table, s->credentials, DCERPC_AUTH_TYPE_SPNEGO, dcerpc_auth_level(s->pipe->conn), s->table->authservices->names[0]); composite_continue(c, auth_req, continue_auth, c); } /* Stage 2 of pipe_auth: Receive result of non-authenticated bind request */ static void continue_auth_none(struct composite_context *ctx) { struct composite_context *c = talloc_get_type(ctx->async.private_data, struct composite_context); c->status = dcerpc_bind_auth_none_recv(ctx); if (!composite_is_ok(c)) return; composite_done(c); } /* Request to perform an authenticated bind if required. Authentication is determined using credentials passed and binding flags. */ struct composite_context *dcerpc_pipe_auth_send(struct dcerpc_pipe *p, struct dcerpc_binding *binding, const struct dcerpc_interface_table *table, struct cli_credentials *credentials) { struct composite_context *c; struct pipe_auth_state *s; struct composite_context *auth_schannel_req; struct composite_context *auth_req; struct composite_context *auth_none_req; struct dcerpc_connection *conn; uint8_t auth_type; /* composite context allocation and setup */ c = composite_create(p, p->conn->event_ctx); if (c == NULL) return NULL; s = talloc_zero(c, struct pipe_auth_state); if (composite_nomem(s, c)) return c; c->private_data = s; /* store parameters in state structure */ s->binding = binding; s->table = table; s->credentials = credentials; s->pipe = p; conn = s->pipe->conn; conn->flags = binding->flags; /* remember the binding string for possible secondary connections */ conn->binding_string = dcerpc_binding_string(p, binding); if (cli_credentials_is_anonymous(s->credentials)) { auth_none_req = dcerpc_bind_auth_none_send(c, s->pipe, s->table); composite_continue(c, auth_none_req, continue_auth_none, c); return c; } if ((binding->flags & DCERPC_SCHANNEL) && !cli_credentials_get_netlogon_creds(s->credentials)) { /* If we don't already have netlogon credentials for * the schannel bind, then we have to get these * first */ auth_schannel_req = dcerpc_bind_auth_schannel_send(c, s->pipe, s->table, s->credentials, dcerpc_auth_level(conn)); composite_continue(c, auth_schannel_req, continue_auth_schannel, c); return c; } /* * we rely on the already authenticated CIFS connection * if not doing sign or seal */ if (conn->transport.transport == NCACN_NP && !(s->binding->flags & (DCERPC_SIGN|DCERPC_SEAL))) { auth_none_req = dcerpc_bind_auth_none_send(c, s->pipe, s->table); composite_continue(c, auth_none_req, continue_auth_none, c); return c; } /* Perform an authenticated DCE-RPC bind */ if (!(conn->flags & (DCERPC_SIGN|DCERPC_SEAL))) { /* 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. */ conn->flags |= DCERPC_CONNECT; } if (s->binding->flags & DCERPC_AUTH_SPNEGO) { auth_type = DCERPC_AUTH_TYPE_SPNEGO; } else if (s->binding->flags & DCERPC_AUTH_KRB5) { auth_type = DCERPC_AUTH_TYPE_KRB5; } else if (s->binding->flags & DCERPC_SCHANNEL) { auth_type = DCERPC_AUTH_TYPE_SCHANNEL; } else if (s->binding->flags & DCERPC_AUTH_NTLM) { auth_type = DCERPC_AUTH_TYPE_NTLMSSP; } else { /* try SPNEGO with fallback to NTLMSSP */ auth_req = dcerpc_bind_auth_send(c, s->pipe, s->table, s->credentials, DCERPC_AUTH_TYPE_SPNEGO, dcerpc_auth_level(conn), s->table->authservices->names[0]); composite_continue(c, auth_req, continue_auth_auto, c); return c; } auth_req = dcerpc_bind_auth_send(c, s->pipe, s->table, s->credentials, auth_type, dcerpc_auth_level(conn), s->table->authservices->names[0]); composite_continue(c, auth_req, continue_auth, c); return c; } /* Receive result of authenticated bind request on dcerpc pipe This returns *p, which may be different to the one originally supllied, as it rebinds to a new pipe due to authentication fallback */ NTSTATUS dcerpc_pipe_auth_recv(struct composite_context *c, TALLOC_CTX *mem_ctx, struct dcerpc_pipe **p) { NTSTATUS status; struct pipe_auth_state *s = talloc_get_type(c->private_data, struct pipe_auth_state); status = composite_wait(c); if (!NT_STATUS_IS_OK(status)) { char *uuid_str = GUID_string(s->pipe, &s->table->syntax_id.uuid); DEBUG(0, ("Failed to bind to uuid %s - %s\n", uuid_str, nt_errstr(status))); talloc_free(uuid_str); } else { talloc_steal(mem_ctx, s->pipe); *p = s->pipe; } talloc_free(c); return status; } /* Perform an authenticated bind if needed - sync version This may change *p, as it rebinds to a new pipe due to authentication fallback */ NTSTATUS dcerpc_pipe_auth(TALLOC_CTX *mem_ctx, struct dcerpc_pipe **p, struct dcerpc_binding *binding, const struct dcerpc_interface_table *table, struct cli_credentials *credentials) { struct composite_context *c; c = dcerpc_pipe_auth_send(*p, binding, table, credentials); return dcerpc_pipe_auth_recv(c, mem_ctx, p); } 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 = table->syntax_id; p2->transfer_syntax = ndr_transfer_syntax; p2->binding = talloc_reference(p2, p->binding); 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; }