diff options
Diffstat (limited to 'source3/librpc/rpc/dcerpc_helpers.c')
| -rw-r--r-- | source3/librpc/rpc/dcerpc_helpers.c | 212 |
1 files changed, 212 insertions, 0 deletions
diff --git a/source3/librpc/rpc/dcerpc_helpers.c b/source3/librpc/rpc/dcerpc_helpers.c new file mode 100644 index 0000000000..ce48a691ac --- /dev/null +++ b/source3/librpc/rpc/dcerpc_helpers.c @@ -0,0 +1,212 @@ +/* + * DCERPC Helper routines + * Günther Deschner <gd@samba.org> 2010. + * Simo Sorce <idra@samba.org> 2010. + * + * 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 3 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, see <http://www.gnu.org/licenses/>. + */ + + +#include "includes.h" +#include "librpc/rpc/dcerpc.h" +#include "librpc/gen_ndr/ndr_dcerpc.h" +#include "librpc/gen_ndr/ndr_schannel.h" + +#undef DBGC_CLASS +#define DBGC_CLASS DBGC_RPC_PARSE + +/** +* @brief NDR Encodes a ncacn_packet +* +* @param mem_ctx The memory context the blob will be allocated on +* @param ptype The DCERPC packet type +* @param pfc_flags The DCERPC PFC Falgs +* @param auth_length The length of the trailing auth blob +* @param call_id The call ID +* @param u The payload of the packet +* @param blob [out] The encoded blob if successful +* +* @return an NTSTATUS error code +*/ +NTSTATUS dcerpc_push_ncacn_packet(TALLOC_CTX *mem_ctx, + enum dcerpc_pkt_type ptype, + uint8_t pfc_flags, + uint16_t auth_length, + uint32_t call_id, + union dcerpc_payload *u, + DATA_BLOB *blob) +{ + struct ncacn_packet r; + enum ndr_err_code ndr_err; + + r.rpc_vers = 5; + r.rpc_vers_minor = 0; + r.ptype = ptype; + r.pfc_flags = pfc_flags; + r.drep[0] = DCERPC_DREP_LE; + r.drep[1] = 0; + r.drep[2] = 0; + r.drep[3] = 0; + r.auth_length = auth_length; + r.call_id = call_id; + r.u = *u; + + ndr_err = ndr_push_struct_blob(blob, mem_ctx, &r, + (ndr_push_flags_fn_t)ndr_push_ncacn_packet); + if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) { + return ndr_map_error2ntstatus(ndr_err); + } + + dcerpc_set_frag_length(blob, blob->length); + + + if (DEBUGLEVEL >= 10) { + /* set frag len for print function */ + r.frag_length = blob->length; + NDR_PRINT_DEBUG(ncacn_packet, &r); + } + + return NT_STATUS_OK; +} + +/** +* @brief Decodes a ncacn_packet +* +* @param mem_ctx The memory context on which to allocate the packet +* elements +* @param blob The blob of data to decode +* @param r An empty ncacn_packet, must not be NULL +* +* @return a NTSTATUS error code +*/ +NTSTATUS dcerpc_pull_ncacn_packet(TALLOC_CTX *mem_ctx, + const DATA_BLOB *blob, + struct ncacn_packet *r) +{ + enum ndr_err_code ndr_err; + + ndr_err = ndr_pull_struct_blob(blob, mem_ctx, r, + (ndr_pull_flags_fn_t)ndr_pull_ncacn_packet); + if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) { + return ndr_map_error2ntstatus(ndr_err); + } + + if (DEBUGLEVEL >= 10) { + NDR_PRINT_DEBUG(ncacn_packet, r); + } + + return NT_STATUS_OK; +} + +/** +* @brief NDR Encodes a NL_AUTH_MESSAGE +* +* @param mem_ctx The memory context the blob will be allocated on +* @param r The NL_AUTH_MESSAGE to encode +* @param blob [out] The encoded blob if successful +* +* @return a NTSTATUS error code +*/ +NTSTATUS dcerpc_push_schannel_bind(TALLOC_CTX *mem_ctx, + struct NL_AUTH_MESSAGE *r, + DATA_BLOB *blob) +{ + enum ndr_err_code ndr_err; + + ndr_err = ndr_push_struct_blob(blob, mem_ctx, r, + (ndr_push_flags_fn_t)ndr_push_NL_AUTH_MESSAGE); + if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) { + return ndr_map_error2ntstatus(ndr_err); + } + + if (DEBUGLEVEL >= 10) { + NDR_PRINT_DEBUG(NL_AUTH_MESSAGE, r); + } + + return NT_STATUS_OK; +} + +/** +* @brief NDR Encodes a dcerpc_auth structure +* +* @param mem_ctx The memory context the blob will be allocated on +* @param auth_type The DCERPC Authentication Type +* @param auth_level The DCERPC Authentication Level +* @param auth_pad_length The padding added to the packet this blob will be +* appended to. +* @param auth_context_id The context id +* @param credentials The authentication credentials blob (signature) +* @param blob [out] The encoded blob if successful +* +* @return a NTSTATUS error code +*/ +NTSTATUS dcerpc_push_dcerpc_auth(TALLOC_CTX *mem_ctx, + enum dcerpc_AuthType auth_type, + enum dcerpc_AuthLevel auth_level, + uint8_t auth_pad_length, + uint32_t auth_context_id, + const DATA_BLOB *credentials, + DATA_BLOB *blob) +{ + struct dcerpc_auth r; + enum ndr_err_code ndr_err; + + r.auth_type = auth_type; + r.auth_level = auth_level; + r.auth_pad_length = auth_pad_length; + r.auth_reserved = 0; + r.auth_context_id = auth_context_id; + r.credentials = *credentials; + + ndr_err = ndr_push_struct_blob(blob, mem_ctx, &r, + (ndr_push_flags_fn_t)ndr_push_dcerpc_auth); + if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) { + return ndr_map_error2ntstatus(ndr_err); + } + + if (DEBUGLEVEL >= 10) { + NDR_PRINT_DEBUG(dcerpc_auth, &r); + } + + return NT_STATUS_OK; +} + +/** +* @brief Decodes a dcerpc_auth blob +* +* @param mem_ctx The memory context on which to allocate the packet +* elements +* @param blob The blob of data to decode +* @param r An empty dcerpc_auth structure, must not be NULL +* +* @return a NTSTATUS error code +*/ +NTSTATUS dcerpc_pull_dcerpc_auth(TALLOC_CTX *mem_ctx, + const DATA_BLOB *blob, + struct dcerpc_auth *r) +{ + enum ndr_err_code ndr_err; + + ndr_err = ndr_pull_struct_blob(blob, mem_ctx, r, + (ndr_pull_flags_fn_t)ndr_pull_dcerpc_auth); + if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) { + return ndr_map_error2ntstatus(ndr_err); + } + + if (DEBUGLEVEL >= 10) { + NDR_PRINT_DEBUG(dcerpc_auth, r); + } + + return NT_STATUS_OK; +} |