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96a649efd8
dn is always returned as NULL on error in ads_build_path(), but coverity can't see that. Easy change to quieten it. Signed-off-by: Jeremy Allison <jra@samba.org> Reviewed-by: Noel Power <npower@samba.org> Autobuild-User(master): Noel Power <npower@samba.org> Autobuild-Date(master): Mon Jul 4 16:42:28 UTC 2022 on sn-devel-184
240 lines
5.1 KiB
C
240 lines
5.1 KiB
C
/*
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Unix SMB/CIFS implementation.
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ads (active directory) utility library
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Copyright (C) Andrew Tridgell 2001
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Copyright (C) Andrew Bartlett 2001
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "includes.h"
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#include "ads.h"
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/* return a ldap dn path from a string, given separators and field name
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caller must free
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*/
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ADS_STATUS ads_build_path(const char *realm,
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const char *sep,
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const char *field,
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int reverse,
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char **_path)
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{
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char *p, *r;
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int numbits = 0;
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char *ret;
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int len;
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char *saveptr;
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*_path = NULL;
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r = SMB_STRDUP(realm);
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if (r == NULL) {
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return ADS_ERROR_NT(NT_STATUS_NO_MEMORY);
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}
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for (p=r; *p; p++) {
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if (strchr(sep, *p)) {
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numbits++;
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}
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}
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len = (numbits+1)*(strlen(field)+1) + strlen(r) + 1;
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ret = (char *)SMB_MALLOC(len);
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if (!ret) {
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free(r);
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return ADS_ERROR_NT(NT_STATUS_NO_MEMORY);
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}
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if (strlcpy(ret,field, len) >= len) {
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/* Truncate ! */
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free(r);
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free(ret);
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return ADS_ERROR_NT(NT_STATUS_NO_MEMORY);
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}
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p=strtok_r(r, sep, &saveptr);
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if (p) {
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if (strlcat(ret, p, len) >= len) {
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free(r);
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free(ret);
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return ADS_ERROR_NT(NT_STATUS_NO_MEMORY);
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}
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while ((p=strtok_r(NULL, sep, &saveptr)) != NULL) {
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int retval;
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char *s = NULL;
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if (reverse)
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retval = asprintf(&s, "%s%s,%s", field, p, ret);
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else
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retval = asprintf(&s, "%s,%s%s", ret, field, p);
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free(ret);
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if (retval == -1) {
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free(r);
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return ADS_ERROR_NT(NT_STATUS_NO_MEMORY);
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}
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ret = SMB_STRDUP(s);
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free(s);
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}
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}
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free(r);
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*_path = ret;
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return ADS_ERROR_NT(NT_STATUS_OK);
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}
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/* return a dn of the form "dc=AA,dc=BB,dc=CC" from a
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realm of the form AA.BB.CC
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caller must free
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*/
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ADS_STATUS ads_build_dn(const char *realm, TALLOC_CTX *mem_ctx, char **_dn)
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{
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ADS_STATUS status;
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char *dn = NULL;
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status = ads_build_path(realm, ".", "dc=", 0, &dn);
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if (!ADS_ERR_OK(status)) {
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SAFE_FREE(dn);
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return status;
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}
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*_dn = talloc_strdup(mem_ctx, dn);
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SAFE_FREE(dn);
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if (*_dn == NULL) {
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return ADS_ERROR_NT(NT_STATUS_NO_MEMORY);
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}
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return ADS_ERROR_NT(NT_STATUS_OK);
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}
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/* return a DNS name in the for aa.bb.cc from the DN
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"dc=AA,dc=BB,dc=CC". caller must free
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*/
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char *ads_build_domain(const char *dn)
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{
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char *dnsdomain = NULL;
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/* result should always be shorter than the DN */
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if ( (dnsdomain = SMB_STRDUP( dn )) == NULL ) {
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DEBUG(0,("ads_build_domain: malloc() failed!\n"));
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return NULL;
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}
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if (!strlower_m( dnsdomain )) {
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SAFE_FREE(dnsdomain);
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return NULL;
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}
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all_string_sub( dnsdomain, "dc=", "", 0);
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all_string_sub( dnsdomain, ",", ".", 0 );
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return dnsdomain;
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}
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static int ads_destructor(ADS_STRUCT *ads)
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{
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#ifdef HAVE_LDAP
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ads_disconnect(ads);
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#endif
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return 0;
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}
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/*
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initialise a ADS_STRUCT, ready for some ads_ ops
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*/
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ADS_STRUCT *ads_init(TALLOC_CTX *mem_ctx,
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const char *realm,
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const char *workgroup,
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const char *ldap_server,
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enum ads_sasl_state_e sasl_state)
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{
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ADS_STRUCT *ads = NULL;
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int wrap_flags;
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ads = talloc_zero(mem_ctx, ADS_STRUCT);
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if (ads == NULL) {
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return NULL;
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}
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talloc_set_destructor(ads, ads_destructor);
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#ifdef HAVE_LDAP
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ads_zero_ldap(ads);
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#endif
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ads->server.realm = talloc_strdup(ads, realm);
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if (realm != NULL && ads->server.realm == NULL) {
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DBG_WARNING("Out of memory\n");
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TALLOC_FREE(ads);
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return NULL;
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}
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ads->server.workgroup = talloc_strdup(ads, workgroup);
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if (workgroup != NULL && ads->server.workgroup == NULL) {
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DBG_WARNING("Out of memory\n");
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TALLOC_FREE(ads);
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return NULL;
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}
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ads->server.ldap_server = talloc_strdup(ads, ldap_server);
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if (ldap_server != NULL && ads->server.ldap_server == NULL) {
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DBG_WARNING("Out of memory\n");
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TALLOC_FREE(ads);
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return NULL;
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}
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wrap_flags = lp_client_ldap_sasl_wrapping();
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if (wrap_flags == -1) {
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wrap_flags = 0;
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}
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switch (sasl_state) {
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case ADS_SASL_PLAIN:
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break;
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case ADS_SASL_SIGN:
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wrap_flags |= ADS_AUTH_SASL_SIGN;
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break;
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case ADS_SASL_SEAL:
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wrap_flags |= ADS_AUTH_SASL_SEAL;
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break;
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}
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ads->auth.flags = wrap_flags;
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/* Start with the configured page size when the connection is new,
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* we will drop it by half we get a timeout. */
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ads->config.ldap_page_size = lp_ldap_page_size();
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return ads;
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}
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/****************************************************************
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****************************************************************/
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bool ads_set_sasl_wrap_flags(ADS_STRUCT *ads, unsigned flags)
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{
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unsigned other_flags;
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if (!ads) {
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return false;
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}
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other_flags = ads->auth.flags & ~(ADS_AUTH_SASL_SIGN|ADS_AUTH_SASL_SEAL);
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ads->auth.flags = flags | other_flags;
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return true;
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}
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