/* * Unix SMB/Netbios implementation. * Version 1.9. * RPC Pipe client / server routines * Copyright (C) Andrew Tridgell 1992-1998, * Copyright (C) Jeremy R. Allison 1995-2005. * Copyright (C) Luke Kenneth Casson Leighton 1996-1998, * Copyright (C) Paul Ashton 1997-1998. * * 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" #undef DBGC_CLASS #define DBGC_CLASS DBGC_RPC_PARSE /******************************************************************* Reads or writes a SEC_ACE structure. ********************************************************************/ static bool sec_io_ace(const char *desc, SEC_ACE *psa, prs_struct *ps, int depth) { uint32 old_offset; uint32 offset_ace_size; uint8 type; if (psa == NULL) return False; prs_debug(ps, depth, desc, "sec_io_ace"); depth++; old_offset = prs_offset(ps); if (MARSHALLING(ps)) { type = (uint8)psa->type; } if(!prs_uint8("type ", ps, depth, &type)) return False; if (UNMARSHALLING(ps)) { psa->type = (enum security_ace_type)type; } if(!prs_uint8("flags", ps, depth, &psa->flags)) return False; if(!prs_uint16_pre("size ", ps, depth, &psa->size, &offset_ace_size)) return False; if(!prs_uint32("access_mask", ps, depth, &psa->access_mask)) return False; /* check whether object access is present */ if (!sec_ace_object(psa->type)) { if (!smb_io_dom_sid("trustee ", &psa->trustee , ps, depth)) return False; } else { if (!prs_uint32("obj_flags", ps, depth, &psa->object.object.flags)) return False; if (psa->object.object.flags & SEC_ACE_OBJECT_PRESENT) if (!smb_io_uuid("obj_guid", &psa->object.object.type.type, ps,depth)) return False; if (psa->object.object.flags & SEC_ACE_OBJECT_INHERITED_PRESENT) if (!smb_io_uuid("inh_guid", &psa->object.object.inherited_type.inherited_type, ps,depth)) return False; if(!smb_io_dom_sid("trustee ", &psa->trustee , ps, depth)) return False; } /* Theorectically an ACE can have a size greater than the sum of its components. When marshalling, pad with extra null bytes up to the correct size. */ if (MARSHALLING(ps) && (psa->size > prs_offset(ps) - old_offset)) { uint32 extra_len = psa->size - (prs_offset(ps) - old_offset); uint32 i; uint8 c = 0; for (i = 0; i < extra_len; i++) { if (!prs_uint8("ace extra space", ps, depth, &c)) return False; } } if(!prs_uint16_post("size ", ps, depth, &psa->size, offset_ace_size, old_offset)) return False; return True; } /******************************************************************* Reads or writes a SEC_ACL structure. First of the xx_io_xx functions that allocates its data structures for you as it reads them. ********************************************************************/ static bool sec_io_acl(const char *desc, SEC_ACL **ppsa, prs_struct *ps, int depth) { unsigned int i; uint32 old_offset; uint32 offset_acl_size; SEC_ACL *psa; uint16 revision; /* * Note that the size is always a multiple of 4 bytes due to the * nature of the data structure. Therefore the prs_align() calls * have been removed as they through us off when doing two-layer * marshalling such as in the printing code (RPC_BUFFER). --jerry */ if (ppsa == NULL) return False; psa = *ppsa; if(UNMARSHALLING(ps) && psa == NULL) { /* * This is a read and we must allocate the stuct to read into. */ if((psa = PRS_ALLOC_MEM(ps, SEC_ACL, 1)) == NULL) return False; *ppsa = psa; } prs_debug(ps, depth, desc, "sec_io_acl"); depth++; old_offset = prs_offset(ps); if (MARSHALLING(ps)) { revision = (uint16)psa->revision; } if(!prs_uint16("revision", ps, depth, &revision)) return False; if (UNMARSHALLING(ps)) { psa->revision = (enum security_acl_revision)revision; } if(!prs_uint16_pre("size ", ps, depth, &psa->size, &offset_acl_size)) return False; if(!prs_uint32("num_aces ", ps, depth, &psa->num_aces)) return False; if (UNMARSHALLING(ps)) { if (psa->num_aces) { if((psa->aces = PRS_ALLOC_MEM(ps, SEC_ACE, psa->num_aces)) == NULL) return False; } else { psa->aces = NULL; } } for (i = 0; i < psa->num_aces; i++) { fstring tmp; slprintf(tmp, sizeof(tmp)-1, "ace_list[%02d]: ", i); if(!sec_io_ace(tmp, &psa->aces[i], ps, depth)) return False; } /* Theorectically an ACL can have a size greater than the sum of its components. When marshalling, pad with extra null bytes up to the correct size. */ if (MARSHALLING(ps) && (psa->size > prs_offset(ps) - old_offset)) { uint32 extra_len = psa->size - (prs_offset(ps) - old_offset); uint8 c = 0; for (i = 0; i < extra_len; i++) { if (!prs_uint8("acl extra space", ps, depth, &c)) return False; } } if(!prs_uint16_post("size ", ps, depth, &psa->size, offset_acl_size, old_offset)) return False; return True; } /******************************************************************* Reads or writes a SEC_DESC structure. If reading and the *ppsd = NULL, allocates the structure. ********************************************************************/ bool sec_io_desc(const char *desc, SEC_DESC **ppsd, prs_struct *ps, int depth) { uint32 old_offset; uint32 max_offset = 0; /* after we're done, move offset to end */ uint32 tmp_offset = 0; uint32 off_sacl, off_dacl, off_owner_sid, off_grp_sid; uint16 revision; SEC_DESC *psd; if (ppsd == NULL) return False; psd = *ppsd; if (psd == NULL) { if(UNMARSHALLING(ps)) { if((psd = PRS_ALLOC_MEM(ps,SEC_DESC,1)) == NULL) return False; *ppsd = psd; } else { /* Marshalling - just ignore. */ return True; } } prs_debug(ps, depth, desc, "sec_io_desc"); depth++; /* start of security descriptor stored for back-calc offset purposes */ old_offset = prs_offset(ps); if (MARSHALLING(ps)) { revision = (uint16)psd->revision; } if(!prs_uint16("revision", ps, depth, &revision)) return False; if (UNMARSHALLING(ps)) { psd->revision = (enum security_descriptor_revision)revision; } if(!prs_uint16("type ", ps, depth, &psd->type)) return False; if (MARSHALLING(ps)) { uint32 offset = SEC_DESC_HEADER_SIZE; /* * Work out the offsets here, as we write it out. */ if (psd->sacl != NULL) { off_sacl = offset; offset += psd->sacl->size; } else { off_sacl = 0; } if (psd->dacl != NULL) { off_dacl = offset; offset += psd->dacl->size; } else { off_dacl = 0; } if (psd->owner_sid != NULL) { off_owner_sid = offset; offset += ndr_size_dom_sid(psd->owner_sid, NULL, 0); } else { off_owner_sid = 0; } if (psd->group_sid != NULL) { off_grp_sid = offset; offset += ndr_size_dom_sid(psd->group_sid, NULL, 0); } else { off_grp_sid = 0; } } if(!prs_uint32("off_owner_sid", ps, depth, &off_owner_sid)) return False; if(!prs_uint32("off_grp_sid ", ps, depth, &off_grp_sid)) return False; if(!prs_uint32("off_sacl ", ps, depth, &off_sacl)) return False; if(!prs_uint32("off_dacl ", ps, depth, &off_dacl)) return False; max_offset = MAX(max_offset, prs_offset(ps)); if (off_owner_sid != 0) { tmp_offset = prs_offset(ps); if(!prs_set_offset(ps, old_offset + off_owner_sid)) return False; if (UNMARSHALLING(ps)) { /* reading */ if((psd->owner_sid = PRS_ALLOC_MEM(ps,DOM_SID,1)) == NULL) return False; } if(!smb_io_dom_sid("owner_sid ", psd->owner_sid , ps, depth)) return False; max_offset = MAX(max_offset, prs_offset(ps)); if (!prs_set_offset(ps,tmp_offset)) return False; } if (psd->group_sid != 0) { tmp_offset = prs_offset(ps); if(!prs_set_offset(ps, old_offset + off_grp_sid)) return False; if (UNMARSHALLING(ps)) { /* reading */ if((psd->group_sid = PRS_ALLOC_MEM(ps,DOM_SID,1)) == NULL) return False; } if(!smb_io_dom_sid("grp_sid", psd->group_sid, ps, depth)) return False; max_offset = MAX(max_offset, prs_offset(ps)); if (!prs_set_offset(ps,tmp_offset)) return False; } if ((psd->type & SEC_DESC_SACL_PRESENT) && off_sacl) { tmp_offset = prs_offset(ps); if(!prs_set_offset(ps, old_offset + off_sacl)) return False; if(!sec_io_acl("sacl", &psd->sacl, ps, depth)) return False; max_offset = MAX(max_offset, prs_offset(ps)); if (!prs_set_offset(ps,tmp_offset)) return False; } if ((psd->type & SEC_DESC_DACL_PRESENT) && off_dacl != 0) { tmp_offset = prs_offset(ps); if(!prs_set_offset(ps, old_offset + off_dacl)) return False; if(!sec_io_acl("dacl", &psd->dacl, ps, depth)) return False; max_offset = MAX(max_offset, prs_offset(ps)); if (!prs_set_offset(ps,tmp_offset)) return False; } if(!prs_set_offset(ps, max_offset)) return False; return True; } /******************************************************************* Reads or writes a SEC_DESC_BUF structure. ********************************************************************/ bool sec_io_desc_buf(const char *desc, SEC_DESC_BUF **ppsdb, prs_struct *ps, int depth) { uint32 off_len; uint32 off_max_len; uint32 old_offset; uint32 size; uint32 len; SEC_DESC_BUF *psdb; uint32 ptr; if (ppsdb == NULL) return False; psdb = *ppsdb; if (UNMARSHALLING(ps) && psdb == NULL) { if((psdb = PRS_ALLOC_MEM(ps,SEC_DESC_BUF,1)) == NULL) return False; *ppsdb = psdb; } prs_debug(ps, depth, desc, "sec_io_desc_buf"); depth++; if(!prs_align(ps)) return False; if(!prs_uint32_pre("max_len", ps, depth, &psdb->sd_size, &off_max_len)) return False; ptr = 1; if(!prs_uint32 ("ptr ", ps, depth, &ptr)) return False; len = ndr_size_security_descriptor(psdb->sd, NULL, 0); if(!prs_uint32_pre("len ", ps, depth, &len, &off_len)) return False; old_offset = prs_offset(ps); /* reading, length is non-zero; writing, descriptor is non-NULL */ if ((UNMARSHALLING(ps) && psdb->sd_size != 0) || (MARSHALLING(ps) && psdb->sd != NULL)) { if(!sec_io_desc("sec ", &psdb->sd, ps, depth)) return False; } if(!prs_align(ps)) return False; size = prs_offset(ps) - old_offset; if(!prs_uint32_post("max_len", ps, depth, &psdb->sd_size, off_max_len, size == 0 ? psdb->sd_size : size)) return False; if(!prs_uint32_post("len ", ps, depth, &len, off_len, size)) return False; return True; }