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-rw-r--r--libcli/security/config.mk2
-rw-r--r--libcli/security/security_descriptor.c533
-rw-r--r--libcli/security/security_descriptor.h64
3 files changed, 598 insertions, 1 deletions
diff --git a/libcli/security/config.mk b/libcli/security/config.mk
index 7ade01510c..060429bd67 100644
--- a/libcli/security/config.mk
+++ b/libcli/security/config.mk
@@ -2,4 +2,4 @@
PRIVATE_DEPENDENCIES = TALLOC
LIBSECURITY_COMMON_OBJ_FILES = $(addprefix $(libclicommonsrcdir)/security/, \
- dom_sid.o display_sec.o secace.o secacl.o)
+ dom_sid.o display_sec.o secace.o secacl.o security_descriptor.o)
diff --git a/libcli/security/security_descriptor.c b/libcli/security/security_descriptor.c
new file mode 100644
index 0000000000..8e9c7eb4a9
--- /dev/null
+++ b/libcli/security/security_descriptor.c
@@ -0,0 +1,533 @@
+/*
+ Unix SMB/CIFS implementation.
+
+ security descriptror utility functions
+
+ Copyright (C) Andrew Tridgell 2004
+
+ 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 "libcli/security/security.h"
+
+/*
+ return a blank security descriptor (no owners, dacl or sacl)
+*/
+struct security_descriptor *security_descriptor_initialise(TALLOC_CTX *mem_ctx)
+{
+ struct security_descriptor *sd;
+
+ sd = talloc(mem_ctx, struct security_descriptor);
+ if (!sd) {
+ return NULL;
+ }
+
+ sd->revision = SD_REVISION;
+ /* we mark as self relative, even though it isn't while it remains
+ a pointer in memory because this simplifies the ndr code later.
+ All SDs that we store/emit are in fact SELF_RELATIVE
+ */
+ sd->type = SEC_DESC_SELF_RELATIVE;
+
+ sd->owner_sid = NULL;
+ sd->group_sid = NULL;
+ sd->sacl = NULL;
+ sd->dacl = NULL;
+
+ return sd;
+}
+
+static struct security_acl *security_acl_dup(TALLOC_CTX *mem_ctx,
+ const struct security_acl *oacl)
+{
+ struct security_acl *nacl;
+
+ nacl = talloc (mem_ctx, struct security_acl);
+ if (nacl == NULL) {
+ return NULL;
+ }
+
+ nacl->aces = (struct security_ace *)talloc_memdup (nacl, oacl->aces, sizeof(struct security_ace) * oacl->num_aces);
+ if ((nacl->aces == NULL) && (oacl->num_aces > 0)) {
+ goto failed;
+ }
+
+ nacl->revision = oacl->revision;
+ nacl->size = oacl->size;
+ nacl->num_aces = oacl->num_aces;
+
+ return nacl;
+
+ failed:
+ talloc_free (nacl);
+ return NULL;
+
+}
+
+/*
+ talloc and copy a security descriptor
+ */
+struct security_descriptor *security_descriptor_copy(TALLOC_CTX *mem_ctx,
+ const struct security_descriptor *osd)
+{
+ struct security_descriptor *nsd;
+
+ nsd = talloc_zero(mem_ctx, struct security_descriptor);
+ if (!nsd) {
+ return NULL;
+ }
+
+ if (osd->owner_sid) {
+ nsd->owner_sid = dom_sid_dup(nsd, osd->owner_sid);
+ if (nsd->owner_sid == NULL) {
+ goto failed;
+ }
+ }
+
+ if (osd->group_sid) {
+ nsd->group_sid = dom_sid_dup(nsd, osd->group_sid);
+ if (nsd->group_sid == NULL) {
+ goto failed;
+ }
+ }
+
+ if (osd->sacl) {
+ nsd->sacl = security_acl_dup(nsd, osd->sacl);
+ if (nsd->sacl == NULL) {
+ goto failed;
+ }
+ }
+
+ if (osd->dacl) {
+ nsd->dacl = security_acl_dup(nsd, osd->dacl);
+ if (nsd->dacl == NULL) {
+ goto failed;
+ }
+ }
+
+ nsd->revision = osd->revision;
+ nsd->type = osd->type;
+
+ return nsd;
+
+ failed:
+ talloc_free(nsd);
+
+ return NULL;
+}
+
+/*
+ add an ACE to an ACL of a security_descriptor
+*/
+
+static NTSTATUS security_descriptor_acl_add(struct security_descriptor *sd,
+ bool add_to_sacl,
+ const struct security_ace *ace)
+{
+ struct security_acl *acl = NULL;
+
+ if (add_to_sacl) {
+ acl = sd->sacl;
+ } else {
+ acl = sd->dacl;
+ }
+
+ if (acl == NULL) {
+ acl = talloc(sd, struct security_acl);
+ if (acl == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+ acl->revision = SECURITY_ACL_REVISION_NT4;
+ acl->size = 0;
+ acl->num_aces = 0;
+ acl->aces = NULL;
+ }
+
+ acl->aces = talloc_realloc(acl, acl->aces,
+ struct security_ace, acl->num_aces+1);
+ if (acl->aces == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ acl->aces[acl->num_aces] = *ace;
+
+ switch (acl->aces[acl->num_aces].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:
+ acl->revision = SECURITY_ACL_REVISION_ADS;
+ break;
+ default:
+ break;
+ }
+
+ acl->num_aces++;
+
+ if (add_to_sacl) {
+ sd->sacl = acl;
+ sd->type |= SEC_DESC_SACL_PRESENT;
+ } else {
+ sd->dacl = acl;
+ sd->type |= SEC_DESC_DACL_PRESENT;
+ }
+
+ return NT_STATUS_OK;
+}
+
+/*
+ add an ACE to the SACL of a security_descriptor
+*/
+
+NTSTATUS security_descriptor_sacl_add(struct security_descriptor *sd,
+ const struct security_ace *ace)
+{
+ return security_descriptor_acl_add(sd, true, ace);
+}
+
+/*
+ add an ACE to the DACL of a security_descriptor
+*/
+
+NTSTATUS security_descriptor_dacl_add(struct security_descriptor *sd,
+ const struct security_ace *ace)
+{
+ return security_descriptor_acl_add(sd, false, ace);
+}
+
+/*
+ delete the ACE corresponding to the given trustee in an ACL of a
+ security_descriptor
+*/
+
+static NTSTATUS security_descriptor_acl_del(struct security_descriptor *sd,
+ bool sacl_del,
+ const struct dom_sid *trustee)
+{
+ int i;
+ bool found = false;
+ struct security_acl *acl = NULL;
+
+ if (sacl_del) {
+ acl = sd->sacl;
+ } else {
+ acl = sd->dacl;
+ }
+
+ if (acl == NULL) {
+ return NT_STATUS_OBJECT_NAME_NOT_FOUND;
+ }
+
+ /* there can be multiple ace's for one trustee */
+ for (i=0;i<acl->num_aces;i++) {
+ if (dom_sid_equal(trustee, &acl->aces[i].trustee)) {
+ memmove(&acl->aces[i], &acl->aces[i+1],
+ sizeof(acl->aces[i]) * (acl->num_aces - (i+1)));
+ acl->num_aces--;
+ if (acl->num_aces == 0) {
+ acl->aces = NULL;
+ }
+ found = true;
+ }
+ }
+
+ if (!found) {
+ return NT_STATUS_OBJECT_NAME_NOT_FOUND;
+ }
+
+ acl->revision = SECURITY_ACL_REVISION_NT4;
+
+ for (i=0;i<acl->num_aces;i++) {
+ switch (acl->aces[i].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:
+ acl->revision = SECURITY_ACL_REVISION_ADS;
+ return NT_STATUS_OK;
+ default:
+ break; /* only for the switch statement */
+ }
+ }
+
+ return NT_STATUS_OK;
+}
+
+/*
+ delete the ACE corresponding to the given trustee in the DACL of a
+ security_descriptor
+*/
+
+NTSTATUS security_descriptor_dacl_del(struct security_descriptor *sd,
+ const struct dom_sid *trustee)
+{
+ return security_descriptor_acl_del(sd, false, trustee);
+}
+
+/*
+ delete the ACE corresponding to the given trustee in the SACL of a
+ security_descriptor
+*/
+
+NTSTATUS security_descriptor_sacl_del(struct security_descriptor *sd,
+ const struct dom_sid *trustee)
+{
+ return security_descriptor_acl_del(sd, true, trustee);
+}
+
+/*
+ compare two security ace structures
+*/
+bool security_ace_equal(const struct security_ace *ace1,
+ const struct security_ace *ace2)
+{
+ if (ace1 == ace2) return true;
+ if (!ace1 || !ace2) return false;
+ if (ace1->type != ace2->type) return false;
+ if (ace1->flags != ace2->flags) return false;
+ if (ace1->access_mask != ace2->access_mask) return false;
+ if (!dom_sid_equal(&ace1->trustee, &ace2->trustee)) return false;
+
+ return true;
+}
+
+
+/*
+ compare two security acl structures
+*/
+bool security_acl_equal(const struct security_acl *acl1,
+ const struct security_acl *acl2)
+{
+ int i;
+
+ if (acl1 == acl2) return true;
+ if (!acl1 || !acl2) return false;
+ if (acl1->revision != acl2->revision) return false;
+ if (acl1->num_aces != acl2->num_aces) return false;
+
+ for (i=0;i<acl1->num_aces;i++) {
+ if (!security_ace_equal(&acl1->aces[i], &acl2->aces[i])) return false;
+ }
+ return true;
+}
+
+/*
+ compare two security descriptors.
+*/
+bool security_descriptor_equal(const struct security_descriptor *sd1,
+ const struct security_descriptor *sd2)
+{
+ if (sd1 == sd2) return true;
+ if (!sd1 || !sd2) return false;
+ if (sd1->revision != sd2->revision) return false;
+ if (sd1->type != sd2->type) return false;
+
+ if (!dom_sid_equal(sd1->owner_sid, sd2->owner_sid)) return false;
+ if (!dom_sid_equal(sd1->group_sid, sd2->group_sid)) return false;
+ if (!security_acl_equal(sd1->sacl, sd2->sacl)) return false;
+ if (!security_acl_equal(sd1->dacl, sd2->dacl)) return false;
+
+ return true;
+}
+
+/*
+ compare two security descriptors, but allow certain (missing) parts
+ to be masked out of the comparison
+*/
+bool security_descriptor_mask_equal(const struct security_descriptor *sd1,
+ const struct security_descriptor *sd2,
+ uint32_t mask)
+{
+ if (sd1 == sd2) return true;
+ if (!sd1 || !sd2) return false;
+ if (sd1->revision != sd2->revision) return false;
+ if ((sd1->type & mask) != (sd2->type & mask)) return false;
+
+ if (!dom_sid_equal(sd1->owner_sid, sd2->owner_sid)) return false;
+ if (!dom_sid_equal(sd1->group_sid, sd2->group_sid)) return false;
+ if ((mask & SEC_DESC_DACL_PRESENT) && !security_acl_equal(sd1->dacl, sd2->dacl)) return false;
+ if ((mask & SEC_DESC_SACL_PRESENT) && !security_acl_equal(sd1->sacl, sd2->sacl)) return false;
+
+ return true;
+}
+
+
+static struct security_descriptor *security_descriptor_appendv(struct security_descriptor *sd,
+ bool add_ace_to_sacl,
+ va_list ap)
+{
+ const char *sidstr;
+
+ while ((sidstr = va_arg(ap, const char *))) {
+ struct dom_sid *sid;
+ struct security_ace *ace = talloc(sd, struct security_ace);
+ NTSTATUS status;
+
+ if (ace == NULL) {
+ talloc_free(sd);
+ return NULL;
+ }
+ ace->type = va_arg(ap, unsigned int);
+ ace->access_mask = va_arg(ap, unsigned int);
+ ace->flags = va_arg(ap, unsigned int);
+ sid = dom_sid_parse_talloc(ace, sidstr);
+ if (sid == NULL) {
+ talloc_free(sd);
+ return NULL;
+ }
+ ace->trustee = *sid;
+ if (add_ace_to_sacl) {
+ status = security_descriptor_sacl_add(sd, ace);
+ } else {
+ status = security_descriptor_dacl_add(sd, ace);
+ }
+ /* TODO: check: would talloc_free(ace) here be correct? */
+ if (!NT_STATUS_IS_OK(status)) {
+ talloc_free(sd);
+ return NULL;
+ }
+ }
+
+ return sd;
+}
+
+struct security_descriptor *security_descriptor_append(struct security_descriptor *sd,
+ ...)
+{
+ va_list ap;
+
+ va_start(ap, sd);
+ sd = security_descriptor_appendv(sd, false, ap);
+ va_end(ap);
+
+ return sd;
+}
+
+static struct security_descriptor *security_descriptor_createv(TALLOC_CTX *mem_ctx,
+ uint16_t sd_type,
+ const char *owner_sid,
+ const char *group_sid,
+ bool add_ace_to_sacl,
+ va_list ap)
+{
+ struct security_descriptor *sd;
+
+ sd = security_descriptor_initialise(mem_ctx);
+ if (sd == NULL) {
+ return NULL;
+ }
+
+ sd->type |= sd_type;
+
+ if (owner_sid) {
+ sd->owner_sid = dom_sid_parse_talloc(sd, owner_sid);
+ if (sd->owner_sid == NULL) {
+ talloc_free(sd);
+ return NULL;
+ }
+ }
+ if (group_sid) {
+ sd->group_sid = dom_sid_parse_talloc(sd, group_sid);
+ if (sd->group_sid == NULL) {
+ talloc_free(sd);
+ return NULL;
+ }
+ }
+
+ return security_descriptor_appendv(sd, add_ace_to_sacl, ap);
+}
+
+/*
+ create a security descriptor using string SIDs. This is used by the
+ torture code to allow the easy creation of complex ACLs
+ This is a varargs function. The list of DACL ACEs ends with a NULL sid.
+
+ Each ACE contains a set of 4 parameters:
+ SID, ACCESS_TYPE, MASK, FLAGS
+
+ a typical call would be:
+
+ sd = security_descriptor_dacl_create(mem_ctx,
+ sd_type_flags,
+ mysid,
+ mygroup,
+ SID_NT_AUTHENTICATED_USERS,
+ SEC_ACE_TYPE_ACCESS_ALLOWED,
+ SEC_FILE_ALL,
+ SEC_ACE_FLAG_OBJECT_INHERIT,
+ NULL);
+ that would create a sd with one DACL ACE
+*/
+
+struct security_descriptor *security_descriptor_dacl_create(TALLOC_CTX *mem_ctx,
+ uint16_t sd_type,
+ const char *owner_sid,
+ const char *group_sid,
+ ...)
+{
+ struct security_descriptor *sd = NULL;
+ va_list ap;
+ va_start(ap, group_sid);
+ sd = security_descriptor_createv(mem_ctx, sd_type, owner_sid,
+ group_sid, false, ap);
+ va_end(ap);
+
+ return sd;
+}
+
+struct security_descriptor *security_descriptor_sacl_create(TALLOC_CTX *mem_ctx,
+ uint16_t sd_type,
+ const char *owner_sid,
+ const char *group_sid,
+ ...)
+{
+ struct security_descriptor *sd = NULL;
+ va_list ap;
+ va_start(ap, group_sid);
+ sd = security_descriptor_createv(mem_ctx, sd_type, owner_sid,
+ group_sid, true, ap);
+ va_end(ap);
+
+ return sd;
+}
+
+struct security_ace *security_ace_create(TALLOC_CTX *mem_ctx,
+ const char *sid_str,
+ enum security_ace_type type,
+ uint32_t access_mask,
+ uint8_t flags)
+
+{
+ struct dom_sid *sid;
+ struct security_ace *ace;
+
+ ace = talloc_zero(mem_ctx, struct security_ace);
+ if (ace == NULL) {
+ return NULL;
+ }
+
+ sid = dom_sid_parse_talloc(ace, sid_str);
+ if (sid == NULL) {
+ talloc_free(ace);
+ return NULL;
+ }
+
+ ace->trustee = *sid;
+ ace->type = type;
+ ace->access_mask = access_mask;
+ ace->flags = flags;
+
+ return ace;
+}
diff --git a/libcli/security/security_descriptor.h b/libcli/security/security_descriptor.h
new file mode 100644
index 0000000000..c535f5d253
--- /dev/null
+++ b/libcli/security/security_descriptor.h
@@ -0,0 +1,64 @@
+/*
+ Unix SMB/CIFS implementation.
+ Samba utility functions
+
+ Copyright (C) 2009 Jelmer Vernooij <jelmer@samba.org>
+
+ 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/>.
+*/
+
+#ifndef __SECURITY_DESCRIPTOR_H__
+#define __SECURITY_DESCRIPTOR_H__
+
+#include "librpc/gen_ndr/security.h"
+
+struct security_descriptor *security_descriptor_initialise(TALLOC_CTX *mem_ctx);
+struct security_descriptor *security_descriptor_copy(TALLOC_CTX *mem_ctx,
+ const struct security_descriptor *osd);
+NTSTATUS security_descriptor_sacl_add(struct security_descriptor *sd,
+ const struct security_ace *ace);
+NTSTATUS security_descriptor_dacl_add(struct security_descriptor *sd,
+ const struct security_ace *ace);
+NTSTATUS security_descriptor_dacl_del(struct security_descriptor *sd,
+ const struct dom_sid *trustee);
+NTSTATUS security_descriptor_sacl_del(struct security_descriptor *sd,
+ const struct dom_sid *trustee);
+bool security_ace_equal(const struct security_ace *ace1,
+ const struct security_ace *ace2);
+bool security_acl_equal(const struct security_acl *acl1,
+ const struct security_acl *acl2);
+bool security_descriptor_equal(const struct security_descriptor *sd1,
+ const struct security_descriptor *sd2);
+bool security_descriptor_mask_equal(const struct security_descriptor *sd1,
+ const struct security_descriptor *sd2,
+ uint32_t mask);
+struct security_descriptor *security_descriptor_append(struct security_descriptor *sd,
+ ...);
+struct security_descriptor *security_descriptor_dacl_create(TALLOC_CTX *mem_ctx,
+ uint16_t sd_type,
+ const char *owner_sid,
+ const char *group_sid,
+ ...);
+struct security_descriptor *security_descriptor_sacl_create(TALLOC_CTX *mem_ctx,
+ uint16_t sd_type,
+ const char *owner_sid,
+ const char *group_sid,
+ ...);
+struct security_ace *security_ace_create(TALLOC_CTX *mem_ctx,
+ const char *sid_str,
+ enum security_ace_type type,
+ uint32_t access_mask,
+ uint8_t flags);
+
+#endif /* __SECURITY_DESCRIPTOR_H__ */
generated by cgit (git 2.34.1) at 2024-11-28 15:22:32 +0000