/* Unix SMB/CIFS implementation. fast routines for getting the wire size of security objects Copyright (C) Andrew Tridgell 2003 Copyright (C) Stefan Metzmacher 2006-2008 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/gen_ndr/ndr_security.h" #if _SAMBA_BUILD_ == 4 #include "libcli/security/security.h" #endif /* return the wire size of a security_ace */ size_t ndr_size_security_ace(const struct security_ace *ace, struct smb_iconv_convenience *ic, int flags) { size_t ret; if (!ace) return 0; ret = 8 + ndr_size_dom_sid(&ace->trustee, ic, flags); switch (ace->type) { case SEC_ACE_TYPE_ACCESS_ALLOWED_OBJECT: case SEC_ACE_TYPE_ACCESS_DENIED_OBJECT: case SEC_ACE_TYPE_SYSTEM_AUDIT_OBJECT: case SEC_ACE_TYPE_SYSTEM_ALARM_OBJECT: ret += 4; /* uint32 bitmap ace->object.object.flags */ if (ace->object.object.flags & SEC_ACE_OBJECT_TYPE_PRESENT) { ret += 16; /* GUID ace->object.object.type.type */ } if (ace->object.object.flags & SEC_ACE_INHERITED_OBJECT_TYPE_PRESENT) { ret += 16; /* GUID ace->object.object.inherited_typeinherited_type */ } break; default: break; } return ret; } enum ndr_err_code ndr_pull_security_ace(struct ndr_pull *ndr, int ndr_flags, struct security_ace *r) { if (ndr_flags & NDR_SCALARS) { uint32_t start_ofs = ndr->offset; uint32_t size = 0; uint32_t pad = 0; NDR_CHECK(ndr_pull_align(ndr, 4)); NDR_CHECK(ndr_pull_security_ace_type(ndr, NDR_SCALARS, &r->type)); NDR_CHECK(ndr_pull_security_ace_flags(ndr, NDR_SCALARS, &r->flags)); NDR_CHECK(ndr_pull_uint16(ndr, NDR_SCALARS, &r->size)); NDR_CHECK(ndr_pull_uint32(ndr, NDR_SCALARS, &r->access_mask)); NDR_CHECK(ndr_pull_set_switch_value(ndr, &r->object, r->type)); NDR_CHECK(ndr_pull_security_ace_object_ctr(ndr, NDR_SCALARS, &r->object)); NDR_CHECK(ndr_pull_dom_sid(ndr, NDR_SCALARS, &r->trustee)); size = ndr->offset - start_ofs; if (r->size < size) { return ndr_pull_error(ndr, NDR_ERR_BUFSIZE, "ndr_pull_security_ace: r->size %u < size %u", (unsigned)r->size, size); } pad = r->size - size; NDR_PULL_NEED_BYTES(ndr, pad); ndr->offset += pad; } if (ndr_flags & NDR_BUFFERS) { NDR_CHECK(ndr_pull_security_ace_object_ctr(ndr, NDR_BUFFERS, &r->object)); } return NDR_ERR_SUCCESS; } /* return the wire size of a security_acl */ size_t ndr_size_security_acl(const struct security_acl *theacl, struct smb_iconv_convenience *ic, int flags) { size_t ret; int i; if (!theacl) return 0; ret = 8; for (i=0;i<theacl->num_aces;i++) { ret += ndr_size_security_ace(&theacl->aces[i], ic, flags); } return ret; } /* return the wire size of a security descriptor */ size_t ndr_size_security_descriptor(const struct security_descriptor *sd, struct smb_iconv_convenience *ic, int flags) { size_t ret; if (!sd) return 0; ret = 20; ret += ndr_size_dom_sid(sd->owner_sid, ic, flags); ret += ndr_size_dom_sid(sd->group_sid, ic, flags); ret += ndr_size_security_acl(sd->dacl, ic, flags); ret += ndr_size_security_acl(sd->sacl, ic, flags); return ret; } /* return the wire size of a dom_sid */ size_t ndr_size_dom_sid(const struct dom_sid *sid, struct smb_iconv_convenience *ic, int flags) { if (!sid) return 0; return 8 + 4*sid->num_auths; } size_t ndr_size_dom_sid28(const struct dom_sid *sid, int flags) { struct dom_sid zero_sid; if (!sid) return 0; ZERO_STRUCT(zero_sid); if (memcmp(&zero_sid, sid, sizeof(zero_sid)) == 0) { return 0; } return 8 + 4*sid->num_auths; } size_t ndr_size_dom_sid0(const struct dom_sid *sid, int flags) { return ndr_size_dom_sid28(sid, flags); } /* print a dom_sid */ void ndr_print_dom_sid(struct ndr_print *ndr, const char *name, const struct dom_sid *sid) { ndr->print(ndr, "%-25s: %s", name, dom_sid_string(ndr, sid)); } void ndr_print_dom_sid2(struct ndr_print *ndr, const char *name, const struct dom_sid *sid) { ndr_print_dom_sid(ndr, name, sid); } void ndr_print_dom_sid28(struct ndr_print *ndr, const char *name, const struct dom_sid *sid) { ndr_print_dom_sid(ndr, name, sid); } void ndr_print_dom_sid0(struct ndr_print *ndr, const char *name, const struct dom_sid *sid) { ndr_print_dom_sid(ndr, name, sid); } /* parse a dom_sid2 - this is a dom_sid but with an extra copy of the num_auths field */ enum ndr_err_code ndr_pull_dom_sid2(struct ndr_pull *ndr, int ndr_flags, struct dom_sid *sid) { uint32_t num_auths; if (!(ndr_flags & NDR_SCALARS)) { return NDR_ERR_SUCCESS; } NDR_CHECK(ndr_pull_uint32(ndr, NDR_SCALARS, &num_auths)); NDR_CHECK(ndr_pull_dom_sid(ndr, ndr_flags, sid)); if (sid->num_auths != num_auths) { return ndr_pull_error(ndr, NDR_ERR_ARRAY_SIZE, "Bad array size %u should exceed %u", num_auths, sid->num_auths); } return NDR_ERR_SUCCESS; } /* parse a dom_sid2 - this is a dom_sid but with an extra copy of the num_auths field */ enum ndr_err_code ndr_push_dom_sid2(struct ndr_push *ndr, int ndr_flags, const struct dom_sid *sid) { if (!(ndr_flags & NDR_SCALARS)) { return NDR_ERR_SUCCESS; } NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, sid->num_auths)); return ndr_push_dom_sid(ndr, ndr_flags, sid); } /* parse a dom_sid28 - this is a dom_sid in a fixed 28 byte buffer, so we need to ensure there are only upto 5 sub_auth */ enum ndr_err_code ndr_pull_dom_sid28(struct ndr_pull *ndr, int ndr_flags, struct dom_sid *sid) { enum ndr_err_code status; struct ndr_pull *subndr; if (!(ndr_flags & NDR_SCALARS)) { return NDR_ERR_SUCCESS; } subndr = talloc_zero(ndr, struct ndr_pull); NDR_ERR_HAVE_NO_MEMORY(subndr); subndr->flags = ndr->flags; subndr->current_mem_ctx = ndr->current_mem_ctx; subndr->data = ndr->data + ndr->offset; subndr->data_size = 28; subndr->offset = 0; NDR_CHECK(ndr_pull_advance(ndr, 28)); status = ndr_pull_dom_sid(subndr, ndr_flags, sid); if (!NDR_ERR_CODE_IS_SUCCESS(status)) { /* handle a w2k bug which send random data in the buffer */ ZERO_STRUCTP(sid); } else if (sid->num_auths == 0 && sid->sub_auths) { ZERO_STRUCT(sid->sub_auths); } return NDR_ERR_SUCCESS; } /* push a dom_sid28 - this is a dom_sid in a 28 byte fixed buffer */ enum ndr_err_code ndr_push_dom_sid28(struct ndr_push *ndr, int ndr_flags, const struct dom_sid *sid) { uint32_t old_offset; uint32_t padding; if (!(ndr_flags & NDR_SCALARS)) { return NDR_ERR_SUCCESS; } if (sid->num_auths > 5) { return ndr_push_error(ndr, NDR_ERR_RANGE, "dom_sid28 allows only upto 5 sub auth [%u]", sid->num_auths); } old_offset = ndr->offset; NDR_CHECK(ndr_push_dom_sid(ndr, ndr_flags, sid)); padding = 28 - (ndr->offset - old_offset); if (padding > 0) { NDR_CHECK(ndr_push_zero(ndr, padding)); } return NDR_ERR_SUCCESS; } /* parse a dom_sid0 - this is a dom_sid in a variable byte buffer, which is maybe empty */ enum ndr_err_code ndr_pull_dom_sid0(struct ndr_pull *ndr, int ndr_flags, struct dom_sid *sid) { if (!(ndr_flags & NDR_SCALARS)) { return NDR_ERR_SUCCESS; } if (ndr->data_size == ndr->offset) { ZERO_STRUCTP(sid); return NDR_ERR_SUCCESS; } return ndr_pull_dom_sid(ndr, ndr_flags, sid); } /* push a dom_sid0 - this is a dom_sid in a variable byte buffer, which is maybe empty */ enum ndr_err_code ndr_push_dom_sid0(struct ndr_push *ndr, int ndr_flags, const struct dom_sid *sid) { struct dom_sid zero_sid; if (!(ndr_flags & NDR_SCALARS)) { return NDR_ERR_SUCCESS; } if (!sid) { return NDR_ERR_SUCCESS; } ZERO_STRUCT(zero_sid); if (memcmp(&zero_sid, sid, sizeof(zero_sid)) == 0) { return NDR_ERR_SUCCESS; } return ndr_push_dom_sid(ndr, ndr_flags, sid); } _PUBLIC_ enum ndr_err_code ndr_push_dom_sid(struct ndr_push *ndr, int ndr_flags, const struct dom_sid *r) { uint32_t cntr_sub_auths_0; if (ndr_flags & NDR_SCALARS) { NDR_CHECK(ndr_push_align(ndr, 4)); NDR_CHECK(ndr_push_uint8(ndr, NDR_SCALARS, r->sid_rev_num)); NDR_CHECK(ndr_push_int8(ndr, NDR_SCALARS, r->num_auths)); NDR_CHECK(ndr_push_array_uint8(ndr, NDR_SCALARS, r->id_auth, 6)); for (cntr_sub_auths_0 = 0; cntr_sub_auths_0 < r->num_auths; cntr_sub_auths_0++) { NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, r->sub_auths[cntr_sub_auths_0])); } } return NDR_ERR_SUCCESS; } _PUBLIC_ enum ndr_err_code ndr_pull_dom_sid(struct ndr_pull *ndr, int ndr_flags, struct dom_sid *r) { uint32_t cntr_sub_auths_0; if (ndr_flags & NDR_SCALARS) { NDR_CHECK(ndr_pull_align(ndr, 4)); NDR_CHECK(ndr_pull_uint8(ndr, NDR_SCALARS, &r->sid_rev_num)); NDR_CHECK(ndr_pull_int8(ndr, NDR_SCALARS, &r->num_auths)); if (r->num_auths < 0 || r->num_auths > 15) { return ndr_pull_error(ndr, NDR_ERR_RANGE, "value out of range"); } NDR_CHECK(ndr_pull_array_uint8(ndr, NDR_SCALARS, r->id_auth, 6)); for (cntr_sub_auths_0 = 0; cntr_sub_auths_0 < r->num_auths; cntr_sub_auths_0++) { NDR_CHECK(ndr_pull_uint32(ndr, NDR_SCALARS, &r->sub_auths[cntr_sub_auths_0])); } } return NDR_ERR_SUCCESS; }