--- /dev/null
+/*
+ Unix SMB/CIFS implementation.
+ ads tls wrapping code
+ Copyright (C) Stefan Metzmacher 2024
+
+ 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 "ads.h"
+#include "lib/param/param.h"
+#include "../source4/lib/tls/tls.h"
+
+void ndr_print_ads_tlswrap_struct(struct ndr_print *ndr, const char *name, const struct ads_tlswrap *r)
+{
+ ndr_print_struct(ndr, name, "tlswrap");
+ ndr->depth++;
+ ndr_print_ptr(ndr, "mem_ctx", r->mem_ctx);
+ ndr_print_timeval(ndr, "endtime", &r->endtime);
+#ifdef HAVE_ADS
+ ndr_print_ptr(ndr, "sbiod", r->sbiod);
+ ndr_print_ptr(ndr, "tls_params", r->tls_params);
+ ndr_print_ptr(ndr, "tls_sync", r->tls_sync);
+#endif /* HAVE_ADS */
+ ndr->depth--;
+}
+
+#ifdef HAVE_ADS
+
+static int ads_tlswrap_setup(Sockbuf_IO_Desc *sbiod, void *arg)
+{
+ struct ads_tlswrap *wrap = (struct ads_tlswrap *)arg;
+
+ wrap->sbiod = sbiod;
+
+ sbiod->sbiod_pvt = wrap;
+
+ return 0;
+}
+
+static int ads_tlswrap_remove(Sockbuf_IO_Desc *sbiod)
+{
+ struct ads_tlswrap *wrap =
+ (struct ads_tlswrap *)sbiod->sbiod_pvt;
+
+ wrap->sbiod = NULL;
+
+ return 0;
+}
+
+static ssize_t ads_tlswrap_send_function(gnutls_transport_ptr_t ptr,
+ const uint8_t *buf, size_t size)
+{
+ struct ads_tlswrap *wrap = (struct ads_tlswrap *)ptr;
+
+ if (wrap->endtime.tv_sec != 0) {
+ if (timeval_expired(&wrap->endtime)) {
+ errno = ECONNRESET;
+ return -1;
+ }
+ }
+
+ return LBER_SBIOD_WRITE_NEXT(wrap->sbiod, discard_const(buf), size);
+}
+
+static ssize_t ads_tlswrap_recv_function(gnutls_transport_ptr_t ptr,
+ uint8_t *buf, size_t size)
+{
+ struct ads_tlswrap *wrap = (struct ads_tlswrap *)ptr;
+
+ if (wrap->endtime.tv_sec != 0) {
+ if (timeval_expired(&wrap->endtime)) {
+ errno = ECONNRESET;
+ return -1;
+ }
+ }
+
+ return LBER_SBIOD_READ_NEXT(wrap->sbiod, buf, size);
+}
+
+static ber_slen_t ads_tlswrap_read(Sockbuf_IO_Desc *sbiod,
+ void *buf, ber_len_t len)
+{
+ struct ads_tlswrap *wrap =
+ (struct ads_tlswrap *)sbiod->sbiod_pvt;
+
+ return tstream_tls_sync_read(wrap->tls_sync, buf, len);
+}
+
+static ber_slen_t ads_tlswrap_write(Sockbuf_IO_Desc *sbiod,
+ void *buf, ber_len_t len)
+{
+ struct ads_tlswrap *wrap =
+ (struct ads_tlswrap *)sbiod->sbiod_pvt;
+
+ return tstream_tls_sync_write(wrap->tls_sync, buf, len);
+}
+
+static int ads_tlswrap_ctrl(Sockbuf_IO_Desc *sbiod, int opt, void *arg)
+{
+ struct ads_tlswrap *wrap =
+ (struct ads_tlswrap *)sbiod->sbiod_pvt;
+ int ret;
+
+ switch (opt) {
+ case LBER_SB_OPT_DATA_READY:
+ if (tstream_tls_sync_pending(wrap->tls_sync) > 0) {
+ return 1;
+ }
+
+ ret = LBER_SBIOD_CTRL_NEXT(sbiod, opt, arg);
+ break;
+ default:
+ ret = LBER_SBIOD_CTRL_NEXT(sbiod, opt, arg);
+ break;
+ }
+
+ return ret;
+}
+
+static int ads_tlswrap_close(Sockbuf_IO_Desc *sbiod)
+{
+ struct ads_tlswrap *wrap =
+ (struct ads_tlswrap *)sbiod->sbiod_pvt;
+
+ TALLOC_FREE(wrap->tls_sync);
+ TALLOC_FREE(wrap->tls_params);
+
+ return 0;
+}
+
+static const Sockbuf_IO ads_tlswrap_sockbuf_io = {
+ ads_tlswrap_setup, /* sbi_setup */
+ ads_tlswrap_remove, /* sbi_remove */
+ ads_tlswrap_ctrl, /* sbi_ctrl */
+ ads_tlswrap_read, /* sbi_read */
+ ads_tlswrap_write, /* sbi_write */
+ ads_tlswrap_close /* sbi_close */
+};
+
+ADS_STATUS ads_setup_tls_wrapping(struct ads_tlswrap *wrap,
+ LDAP *ld,
+ const char *server_name)
+{
+ Sockbuf_IO *io = discard_const_p(Sockbuf_IO, &ads_tlswrap_sockbuf_io);
+ Sockbuf *sb = NULL;
+ struct loadparm_context *lp_ctx = NULL;
+ ADS_STATUS status;
+ NTSTATUS ntstatus;
+ unsigned to;
+ int rc;
+
+ rc = ldap_get_option(ld, LDAP_OPT_SOCKBUF, &sb);
+ status = ADS_ERROR_LDAP(rc);
+ if (!ADS_ERR_OK(status)) {
+ return status;
+ }
+
+ lp_ctx = loadparm_init_s3(talloc_tos(), loadparm_s3_helpers());
+ if (lp_ctx == NULL) {
+ return ADS_ERROR(LDAP_NO_MEMORY);
+ }
+
+ ntstatus = tstream_tls_params_client_lpcfg(wrap->mem_ctx,
+ lp_ctx,
+ server_name,
+ &wrap->tls_params);
+ if (!NT_STATUS_IS_OK(ntstatus)) {
+ return ADS_ERROR_NT(ntstatus);
+ }
+
+ /* setup the real wrapping callbacks */
+ rc = ber_sockbuf_add_io(sb, io, LBER_SBIOD_LEVEL_TRANSPORT, wrap);
+ status = ADS_ERROR_LDAP(rc);
+ if (!ADS_ERR_OK(status)) {
+ return status;
+ }
+
+ to = lpcfg_ldap_connection_timeout(lp_ctx);
+ wrap->endtime = timeval_current_ofs(to, 0);
+ ntstatus = tstream_tls_sync_setup(wrap->tls_params,
+ wrap,
+ ads_tlswrap_send_function,
+ ads_tlswrap_recv_function,
+ wrap->mem_ctx,
+ &wrap->tls_sync);
+ wrap->endtime = timeval_zero();
+ if (!NT_STATUS_IS_OK(ntstatus)) {
+ ber_sockbuf_remove_io(sb, io, LBER_SBIOD_LEVEL_TRANSPORT);
+ return ADS_ERROR_NT(ntstatus);
+ }
+
+ return ADS_SUCCESS;
+}
+
+const DATA_BLOB *ads_tls_channel_bindings(struct ads_tlswrap *wrap)
+{
+ if (wrap->tls_sync == NULL) {
+ return NULL;
+ }
+
+ return tstream_tls_sync_channel_bindings(wrap->tls_sync);
+}
+#else
+ADS_STATUS ads_setup_tls_wrapping(struct ads_tlswrap *wrap,
+ LDAP *ld,
+ const char *server_name)
+{
+ return ADS_ERROR_NT(NT_STATUS_NOT_SUPPORTED);
+}
+const DATA_BLOB *ads_tls_channel_bindings(struct ads_tlswrap *wrap)
+{
+ return NULL;
+}
+#endif /* HAVE_ADS */
git.samba.org / samba.git / commitdiff