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-rw-r--r--source3/utils/sharesec.c609
1 files changed, 609 insertions, 0 deletions
diff --git a/source3/utils/sharesec.c b/source3/utils/sharesec.c
new file mode 100644
index 0000000..9b8064d
--- /dev/null
+++ b/source3/utils/sharesec.c
@@ -0,0 +1,609 @@
+/*
+ * Unix SMB/Netbios implementation.
+ * Utility for managing share permissions
+ *
+ * Copyright (C) Tim Potter 2000
+ * Copyright (C) Jeremy Allison 2000
+ * Copyright (C) Jelmer Vernooij 2003
+ * Copyright (C) Gerald (Jerry) Carter 2005.
+ *
+ * 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/>.
+ */
+
+struct cli_state;
+
+#include "includes.h"
+#include "lib/cmdline/cmdline.h"
+#include "../libcli/security/security.h"
+#include "passdb/machine_sid.h"
+#include "util_sd.h"
+#include "cmdline_contexts.h"
+#include "lib/util/string_wrappers.h"
+
+static TALLOC_CTX *ctx;
+
+enum acl_mode { SMB_ACL_DELETE,
+ SMB_ACL_MODIFY,
+ SMB_ACL_ADD,
+ SMB_ACL_SET,
+ SMB_SD_DELETE,
+ SMB_SD_SETSDDL,
+ SMB_SD_VIEWSDDL,
+ SMB_ACL_VIEW,
+ SMB_ACL_VIEW_ALL };
+
+/********************************************************************
+********************************************************************/
+
+static struct security_descriptor* parse_acl_string(TALLOC_CTX *mem_ctx, const char *szACL, size_t *sd_size )
+{
+ struct security_descriptor *sd = NULL;
+ struct security_ace *ace;
+ struct security_acl *theacl;
+ int num_ace;
+ const char *pacl;
+ int i;
+
+ if ( !szACL )
+ return NULL;
+
+ pacl = szACL;
+ num_ace = count_chars( pacl, ',' ) + 1;
+
+ if ( !(ace = talloc_zero_array( mem_ctx, struct security_ace, num_ace )) )
+ return NULL;
+
+ for ( i=0; i<num_ace; i++ ) {
+ char *end_acl = strchr_m( pacl, ',' );
+ fstring acl_string;
+
+ strncpy( acl_string, pacl, MIN( PTR_DIFF( end_acl, pacl ), sizeof(fstring)-1) );
+ acl_string[MIN( PTR_DIFF( end_acl, pacl ), sizeof(fstring)-1)] = '\0';
+
+ if ( !parse_ace(NULL, &ace[i], acl_string ) )
+ return NULL;
+
+ pacl = end_acl;
+ pacl++;
+ }
+
+ if ( !(theacl = make_sec_acl( mem_ctx, NT4_ACL_REVISION, num_ace, ace )) )
+ return NULL;
+
+ sd = make_sec_desc( mem_ctx, SD_REVISION, SEC_DESC_SELF_RELATIVE,
+ NULL, NULL, NULL, theacl, sd_size);
+
+ return sd;
+}
+
+/* add an ACE to a list of ACEs in a struct security_acl */
+static bool add_ace(TALLOC_CTX *mem_ctx, struct security_acl **the_acl, struct security_ace *ace)
+{
+ struct security_acl *acl = *the_acl;
+
+ if (acl == NULL) {
+ acl = make_sec_acl(mem_ctx, 3, 1, ace);
+ if (acl == NULL) {
+ return false;
+ }
+ }
+
+ if (acl->num_aces == UINT32_MAX) {
+ return false;
+ }
+ ADD_TO_ARRAY(
+ acl, struct security_ace, *ace, &acl->aces, &acl->num_aces);
+ *the_acl = acl;
+ return True;
+}
+
+/* The MSDN is contradictory over the ordering of ACE entries in an ACL.
+ However NT4 gives a "The information may have been modified by a
+ computer running Windows NT 5.0" if denied ACEs do not appear before
+ allowed ACEs. */
+
+static int ace_compare(struct security_ace *ace1, struct security_ace *ace2)
+{
+ if (security_ace_equal(ace1, ace2))
+ return 0;
+
+ if (ace1->type != ace2->type)
+ return ace2->type - ace1->type;
+
+ if (dom_sid_compare(&ace1->trustee, &ace2->trustee))
+ return dom_sid_compare(&ace1->trustee, &ace2->trustee);
+
+ if (ace1->flags != ace2->flags)
+ return ace1->flags - ace2->flags;
+
+ if (ace1->access_mask != ace2->access_mask)
+ return ace1->access_mask - ace2->access_mask;
+
+ if (ace1->size != ace2->size)
+ return ace1->size - ace2->size;
+
+ return memcmp(ace1, ace2, sizeof(struct security_ace));
+}
+
+static void sort_acl(struct security_acl *the_acl)
+{
+ uint32_t i;
+ if (!the_acl) return;
+
+ TYPESAFE_QSORT(the_acl->aces, the_acl->num_aces, ace_compare);
+
+ for (i=1;i<the_acl->num_aces;) {
+ if (security_ace_equal(&the_acl->aces[i-1],
+ &the_acl->aces[i])) {
+ ARRAY_DEL_ELEMENT(
+ the_acl->aces, i, the_acl->num_aces);
+ the_acl->num_aces--;
+ } else {
+ i++;
+ }
+ }
+}
+
+
+static int change_share_sec(TALLOC_CTX *mem_ctx, const char *sharename, char *the_acl, enum acl_mode mode)
+{
+ struct security_descriptor *sd = NULL;
+ struct security_descriptor *old = NULL;
+ size_t sd_size = 0;
+ uint32_t i, j;
+ NTSTATUS status;
+
+ if (mode != SMB_ACL_SET && mode != SMB_SD_DELETE) {
+ if (!(old = get_share_security( mem_ctx, sharename, &sd_size )) ) {
+ fprintf(stderr, "Unable to retrieve permissions for share "
+ "[%s]\n", sharename);
+ return -1;
+ }
+ }
+
+ if ( (mode != SMB_ACL_VIEW && mode != SMB_SD_DELETE) &&
+ !(sd = parse_acl_string(mem_ctx, the_acl, &sd_size )) ) {
+ fprintf( stderr, "Failed to parse acl\n");
+ return -1;
+ }
+
+ switch (mode) {
+ case SMB_ACL_VIEW_ALL:
+ /* should not happen */
+ return 0;
+ case SMB_ACL_VIEW:
+ sec_desc_print(NULL, stdout, old, false);
+ return 0;
+ case SMB_ACL_DELETE:
+ for (i=0;sd->dacl && i<sd->dacl->num_aces;i++) {
+ bool found = False;
+
+ for (j=0;old->dacl && j<old->dacl->num_aces;j++) {
+ if (security_ace_equal(&sd->dacl->aces[i],
+ &old->dacl->aces[j])) {
+ uint32_t k;
+ for (k=j; k<old->dacl->num_aces-1;k++) {
+ old->dacl->aces[k] = old->dacl->aces[k+1];
+ }
+ old->dacl->num_aces--;
+ found = True;
+ break;
+ }
+ }
+
+ if (!found) {
+ printf("ACL for ACE:");
+ print_ace(NULL, stdout, &sd->dacl->aces[i], false);
+ printf(" not found\n");
+ }
+ }
+ break;
+ case SMB_ACL_MODIFY:
+ for (i=0;sd->dacl && i<sd->dacl->num_aces;i++) {
+ bool found = False;
+
+ for (j=0;old->dacl && j<old->dacl->num_aces;j++) {
+ if (dom_sid_equal(&sd->dacl->aces[i].trustee,
+ &old->dacl->aces[j].trustee)) {
+ old->dacl->aces[j] = sd->dacl->aces[i];
+ found = True;
+ }
+ }
+
+ if (!found) {
+ struct dom_sid_buf buf;
+ printf("ACL for SID %s not found\n",
+ dom_sid_str_buf(&sd->dacl->aces[i].trustee, &buf));
+ }
+ }
+
+ if (sd->owner_sid) {
+ old->owner_sid = sd->owner_sid;
+ }
+
+ if (sd->group_sid) {
+ old->group_sid = sd->group_sid;
+ }
+ break;
+ case SMB_ACL_ADD:
+ for (i=0;sd->dacl && i<sd->dacl->num_aces;i++) {
+ add_ace(mem_ctx, &old->dacl, &sd->dacl->aces[i]);
+ }
+ break;
+ case SMB_ACL_SET:
+ old = sd;
+ break;
+ case SMB_SD_DELETE:
+ status = delete_share_security(sharename);
+ if (!NT_STATUS_IS_OK(status)) {
+ fprintf( stderr, "Failed to delete security descriptor for "
+ "share [%s]\n", sharename );
+ return -1;
+ }
+ return 0;
+ default:
+ fprintf(stderr, "invalid command\n");
+ return -1;
+ }
+
+ /* Denied ACE entries must come before allowed ones */
+ sort_acl(old->dacl);
+
+ status = set_share_security(sharename, old);
+ if (!NT_STATUS_IS_OK(status)) {
+ fprintf( stderr, "Failed to store acl for share [%s]\n", sharename );
+ return 2;
+ }
+ return 0;
+}
+
+static int set_sharesec_sddl(const char *sharename, const char *sddl)
+{
+ struct security_descriptor *sd;
+ NTSTATUS status;
+
+ sd = sddl_decode(talloc_tos(), sddl, get_global_sam_sid());
+ if (sd == NULL) {
+ fprintf(stderr, "Failed to parse acl\n");
+ return -1;
+ }
+
+ status = set_share_security(sharename, sd);
+ TALLOC_FREE(sd);
+ if (!NT_STATUS_IS_OK(status)) {
+ fprintf(stderr, "Failed to store acl for share [%s]\n",
+ sharename);
+ return -1;
+ }
+
+ return 0;
+}
+
+static int view_sharesec_sddl(const char *sharename)
+{
+ struct security_descriptor *sd;
+ size_t sd_size;
+ char *acl;
+
+ sd = get_share_security(talloc_tos(), sharename, &sd_size);
+ if (sd == NULL) {
+ fprintf(stderr, "Unable to retrieve permissions for share "
+ "[%s]\n", sharename);
+ return -1;
+ }
+
+ acl = sddl_encode(talloc_tos(), sd, get_global_sam_sid());
+ TALLOC_FREE(sd);
+ if (acl == NULL) {
+ fprintf(stderr, "Unable to sddl-encode permissions for share "
+ "[%s]\n", sharename);
+ return -1;
+ }
+ printf("%s\n", acl);
+ TALLOC_FREE(acl);
+ return 0;
+}
+
+/********************************************************************
+ main program
+********************************************************************/
+
+enum {
+ OPT_VIEW_ALL = 1000,
+ OPT_VIEW_SDDL,
+};
+
+int main(int argc, const char *argv[])
+{
+ int opt;
+ int retval = 0;
+ enum acl_mode mode = SMB_ACL_SET;
+ static char *the_acl = NULL;
+ fstring sharename;
+ bool force_acl = False;
+ int snum;
+ poptContext pc;
+ bool initialize_sid = False;
+ bool ok;
+ struct poptOption long_options[] = {
+ POPT_AUTOHELP
+ {
+ .longName = "remove",
+ .shortName = 'r',
+ .argInfo = POPT_ARG_STRING,
+ .arg = &the_acl,
+ .val = 'r',
+ .descrip = "Remove ACEs",
+ .argDescrip = "ACL",
+ },
+ {
+ .longName = "modify",
+ .shortName = 'm',
+ .argInfo = POPT_ARG_STRING,
+ .arg = &the_acl,
+ .val = 'm',
+ .descrip = "Modify existing ACEs",
+ .argDescrip = "ACL",
+ },
+ {
+ .longName = "add",
+ .shortName = 'a',
+ .argInfo = POPT_ARG_STRING,
+ .arg = &the_acl,
+ .val = 'a',
+ .descrip = "Add ACEs",
+ .argDescrip = "ACL",
+ },
+ {
+ .longName = "replace",
+ .shortName = 'R',
+ .argInfo = POPT_ARG_STRING,
+ .arg = &the_acl,
+ .val = 'R',
+ .descrip = "Overwrite share permission ACL",
+ .argDescrip = "ACLS",
+ },
+ {
+ .longName = "delete",
+ .shortName = 'D',
+ .argInfo = POPT_ARG_NONE,
+ .arg = NULL,
+ .val = 'D',
+ .descrip = "Delete the entire security descriptor",
+ },
+ {
+ .longName = "setsddl",
+ .shortName = 'S',
+ .argInfo = POPT_ARG_STRING,
+ .arg = the_acl,
+ .val = 'S',
+ .descrip = "Set the SD in sddl format",
+ },
+ {
+ .longName = "viewsddl",
+ .argInfo = POPT_ARG_NONE,
+ .arg = the_acl,
+ .val = OPT_VIEW_SDDL,
+ .descrip = "View the SD in sddl format",
+ },
+ {
+ .longName = "view",
+ .shortName = 'v',
+ .argInfo = POPT_ARG_NONE,
+ .arg = NULL,
+ .val = 'v',
+ .descrip = "View current share permissions",
+ },
+ {
+ .longName = "view-all",
+ .shortName = 0,
+ .argInfo = POPT_ARG_NONE,
+ .arg = NULL,
+ .val = OPT_VIEW_ALL,
+ .descrip = "View all current share permissions",
+ },
+ {
+ .longName = "machine-sid",
+ .shortName = 'M',
+ .argInfo = POPT_ARG_NONE,
+ .arg = NULL,
+ .val = 'M',
+ .descrip = "Initialize the machine SID",
+ },
+ {
+ .longName = "force",
+ .shortName = 'F',
+ .argInfo = POPT_ARG_NONE,
+ .arg = NULL,
+ .val = 'F',
+ .descrip = "Force storing the ACL",
+ .argDescrip = "ACLS",
+ },
+ POPT_COMMON_SAMBA
+ POPT_COMMON_VERSION
+ POPT_TABLEEND
+ };
+
+ if ( !(ctx = talloc_stackframe()) ) {
+ fprintf( stderr, "Failed to initialize talloc context!\n");
+ return -1;
+ }
+
+ smb_init_locale();
+
+ ok = samba_cmdline_init(ctx,
+ SAMBA_CMDLINE_CONFIG_NONE,
+ false /* require_smbconf */);
+ if (!ok) {
+ DBG_ERR("Failed to init cmdline parser!\n");
+ TALLOC_FREE(ctx);
+ exit(1);
+ }
+ /* set default debug level to 1 regardless of what smb.conf sets */
+ lp_set_cmdline("log level", "1");
+
+ pc = samba_popt_get_context(getprogname(),
+ argc,
+ argv,
+ long_options,
+ 0);
+ if (pc == NULL) {
+ DBG_ERR("Failed to setup popt context!\n");
+ TALLOC_FREE(ctx);
+ exit(1);
+ }
+
+ poptSetOtherOptionHelp(pc, "sharename\n");
+
+ while ((opt = poptGetNextOpt(pc)) != -1) {
+ switch (opt) {
+ case 'r':
+ the_acl = smb_xstrdup(poptGetOptArg(pc));
+ mode = SMB_ACL_DELETE;
+ break;
+
+ case 'm':
+ the_acl = smb_xstrdup(poptGetOptArg(pc));
+ mode = SMB_ACL_MODIFY;
+ break;
+
+ case 'a':
+ the_acl = smb_xstrdup(poptGetOptArg(pc));
+ mode = SMB_ACL_ADD;
+ break;
+
+ case 'R':
+ the_acl = smb_xstrdup(poptGetOptArg(pc));
+ mode = SMB_ACL_SET;
+ break;
+
+ case 'D':
+ mode = SMB_SD_DELETE;
+ break;
+
+ case 'S':
+ mode = SMB_SD_SETSDDL;
+ the_acl = smb_xstrdup(poptGetOptArg(pc));
+ break;
+
+ case OPT_VIEW_SDDL:
+ mode = SMB_SD_VIEWSDDL;
+ break;
+
+ case 'v':
+ mode = SMB_ACL_VIEW;
+ break;
+
+ case 'F':
+ force_acl = True;
+ break;
+
+ case 'M':
+ initialize_sid = True;
+ break;
+ case OPT_VIEW_ALL:
+ mode = SMB_ACL_VIEW_ALL;
+ break;
+ case POPT_ERROR_BADOPT:
+ fprintf(stderr, "\nInvalid option %s: %s\n\n",
+ poptBadOption(pc, 0), poptStrerror(opt));
+ poptPrintUsage(pc, stderr, 0);
+ exit(1);
+ }
+ }
+
+ setlinebuf(stdout);
+
+ lp_load_with_registry_shares(get_dyn_CONFIGFILE());
+
+ /* check for initializing secrets.tdb first */
+
+ if ( initialize_sid ) {
+ struct dom_sid *sid = get_global_sam_sid();
+ struct dom_sid_buf buf;
+
+ if ( !sid ) {
+ fprintf( stderr, "Failed to retrieve Machine SID!\n");
+ retval = 3;
+ goto done;
+ }
+
+ printf ("%s\n", dom_sid_str_buf(sid, &buf) );
+ retval = 0;
+ goto done;
+ }
+
+ if ( mode == SMB_ACL_VIEW && force_acl ) {
+ fprintf( stderr, "Invalid combination of -F and -v\n");
+ retval = -1;
+ goto done;
+ }
+
+ if (mode == SMB_ACL_VIEW_ALL) {
+ int i;
+
+ for (i=0; i<lp_numservices(); i++) {
+ TALLOC_CTX *frame = talloc_stackframe();
+ const struct loadparm_substitution *lp_sub =
+ loadparm_s3_global_substitution();
+ const char *service = lp_servicename(frame, lp_sub, i);
+
+ if (service == NULL) {
+ continue;
+ }
+
+ printf("[%s]\n", service);
+ change_share_sec(frame, service, NULL, SMB_ACL_VIEW);
+ printf("\n");
+ TALLOC_FREE(frame);
+ }
+ goto done;
+ }
+
+ /* get the sharename */
+
+ if(!poptPeekArg(pc)) {
+ poptPrintUsage(pc, stderr, 0);
+ retval = -1;
+ goto done;
+ }
+
+ fstrcpy(sharename, poptGetArg(pc));
+
+ snum = lp_servicenumber( sharename );
+
+ if ( snum == -1 && !force_acl ) {
+ fprintf( stderr, "Invalid sharename: %s\n", sharename);
+ retval = -1;
+ goto done;
+ }
+
+ switch (mode) {
+ case SMB_SD_SETSDDL:
+ retval = set_sharesec_sddl(sharename, the_acl);
+ break;
+ case SMB_SD_VIEWSDDL:
+ retval = view_sharesec_sddl(sharename);
+ break;
+ default:
+ retval = change_share_sec(ctx, sharename, the_acl, mode);
+ break;
+ }
+
+done:
+ poptFreeContext(pc);
+ talloc_destroy(ctx);
+
+ return retval;
+}
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