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-rw-r--r--source3/rpc_server/dcesrv_spnego.c308
-rw-r--r--source3/rpc_server/dcesrv_spnego.h37
2 files changed, 345 insertions, 0 deletions
diff --git a/source3/rpc_server/dcesrv_spnego.c b/source3/rpc_server/dcesrv_spnego.c
new file mode 100644
index 0000000000..4686534a2e
--- /dev/null
+++ b/source3/rpc_server/dcesrv_spnego.c
@@ -0,0 +1,308 @@
+/*
+ * SPNEGO Encapsulation
+ * DCERPC Server functions
+ * Copyright (C) Simo Sorce 2010.
+ *
+ * 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/auth/spnego.h"
+#include "dcesrv_ntlmssp.h"
+#include "dcesrv_gssapi.h"
+#include "dcesrv_spnego.h"
+
+static NTSTATUS spnego_init_server(TALLOC_CTX *mem_ctx,
+ bool do_sign, bool do_seal,
+ bool is_dcerpc,
+ struct spnego_context **spnego_ctx)
+{
+ struct spnego_context *sp_ctx = NULL;
+
+ sp_ctx = talloc_zero(mem_ctx, struct spnego_context);
+ if (!sp_ctx) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ sp_ctx->do_sign = do_sign;
+ sp_ctx->do_seal = do_seal;
+ sp_ctx->is_dcerpc = is_dcerpc;
+
+ *spnego_ctx = sp_ctx;
+ return NT_STATUS_OK;
+}
+
+static NTSTATUS spnego_server_mech_init(struct spnego_context *sp_ctx,
+ DATA_BLOB *token_in,
+ DATA_BLOB *token_out)
+{
+ struct auth_ntlmssp_state *ntlmssp_ctx;
+ struct gse_context *gse_ctx;
+ NTSTATUS status;
+
+ switch (sp_ctx->mech) {
+ case SPNEGO_KRB5:
+ status = gssapi_server_auth_start(sp_ctx,
+ sp_ctx->do_sign,
+ sp_ctx->do_seal,
+ sp_ctx->is_dcerpc,
+ token_in,
+ token_out,
+ &gse_ctx);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(0, ("Failed to init gssapi server "
+ "(%s)\n", nt_errstr(status)));
+ return status;
+ }
+
+ sp_ctx->mech_ctx.gssapi_state = gse_ctx;
+ break;
+
+ case SPNEGO_NTLMSSP:
+ status = ntlmssp_server_auth_start(sp_ctx,
+ sp_ctx->do_sign,
+ sp_ctx->do_seal,
+ sp_ctx->is_dcerpc,
+ token_in,
+ token_out,
+ &ntlmssp_ctx);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(0, ("Failed to init ntlmssp server "
+ "(%s)\n", nt_errstr(status)));
+ return status;
+ }
+
+ sp_ctx->mech_ctx.ntlmssp_state = ntlmssp_ctx;
+ break;
+
+ default:
+ DEBUG(3, ("No known mechanisms available\n"));
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+
+ return NT_STATUS_OK;
+}
+
+NTSTATUS spnego_server_step(struct spnego_context *sp_ctx,
+ TALLOC_CTX *mem_ctx,
+ DATA_BLOB *spnego_in,
+ DATA_BLOB *spnego_out)
+{
+ DATA_BLOB token_in = data_blob_null;
+ DATA_BLOB token_out = data_blob_null;
+ DATA_BLOB signature = data_blob_null;
+ DATA_BLOB MICblob = data_blob_null;
+ struct spnego_data sp_in;
+ ssize_t len_in = 0;
+ NTSTATUS status;
+ bool ret;
+
+ len_in = spnego_read_data(mem_ctx, *spnego_in, &sp_in);
+ if (len_in == -1) {
+ DEBUG(1, (__location__ ": invalid SPNEGO blob.\n"));
+ dump_data(10, spnego_in->data, spnego_in->length);
+ status = NT_STATUS_INVALID_PARAMETER;
+ sp_ctx->state = SPNEGO_CONV_AUTH_DONE;
+ goto done;
+ }
+ if (sp_in.type != SPNEGO_NEG_TOKEN_TARG) {
+ status = NT_STATUS_INVALID_PARAMETER;
+ goto done;
+ }
+ token_in = sp_in.negTokenTarg.responseToken;
+ signature = sp_in.negTokenTarg.mechListMIC;
+
+ switch (sp_ctx->state) {
+ case SPNEGO_CONV_NEGO:
+ /* still to initialize */
+ status = spnego_server_mech_init(sp_ctx,
+ &token_in,
+ &token_out);
+ if (!NT_STATUS_IS_OK(status)) {
+ goto done;
+ }
+ /* server always need at least one reply from client */
+ status = NT_STATUS_MORE_PROCESSING_REQUIRED;
+ sp_ctx->state = SPNEGO_CONV_AUTH_MORE;
+ break;
+
+ case SPNEGO_CONV_AUTH_MORE:
+
+ switch(sp_ctx->mech) {
+ case SPNEGO_KRB5:
+ status = gssapi_server_step(
+ sp_ctx->mech_ctx.gssapi_state,
+ mem_ctx, &token_in, &token_out);
+ break;
+ case SPNEGO_NTLMSSP:
+ status = ntlmssp_server_step(
+ sp_ctx->mech_ctx.ntlmssp_state,
+ mem_ctx, &token_in, &token_out);
+ break;
+ default:
+ status = NT_STATUS_INVALID_PARAMETER;
+ goto done;
+ }
+
+ break;
+
+ case SPNEGO_CONV_AUTH_DONE:
+ /* we are already done, can't step further */
+ /* fall thorugh and return error */
+ default:
+ /* wrong case */
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+
+ if (NT_STATUS_IS_OK(status) && signature.length != 0) {
+ /* last packet and requires signature check */
+ ret = spnego_mech_list_blob(talloc_tos(),
+ sp_ctx->oid_list, &MICblob);
+ if (ret) {
+ status = spnego_sigcheck(talloc_tos(), sp_ctx,
+ &MICblob, &MICblob,
+ &signature);
+ } else {
+ status = NT_STATUS_UNSUCCESSFUL;
+ }
+ }
+ if (NT_STATUS_IS_OK(status) && signature.length != 0) {
+ /* if signature was good, sign our own packet too */
+ status = spnego_sign(talloc_tos(), sp_ctx,
+ &MICblob, &MICblob, &signature);
+ }
+
+done:
+ *spnego_out = spnego_gen_auth_response_and_mic(mem_ctx, status,
+ sp_ctx->mech_oid,
+ &token_out,
+ &signature);
+ if (!spnego_out->data) {
+ DEBUG(1, ("SPNEGO wrapping failed!\n"));
+ status = NT_STATUS_UNSUCCESSFUL;
+ }
+
+ if (NT_STATUS_IS_OK(status) ||
+ !NT_STATUS_EQUAL(status,
+ NT_STATUS_MORE_PROCESSING_REQUIRED)) {
+ sp_ctx->state = SPNEGO_CONV_AUTH_DONE;
+ }
+
+ data_blob_free(&token_in);
+ data_blob_free(&token_out);
+ return status;
+}
+
+NTSTATUS spnego_server_auth_start(TALLOC_CTX *mem_ctx,
+ bool do_sign,
+ bool do_seal,
+ bool is_dcerpc,
+ DATA_BLOB *spnego_in,
+ DATA_BLOB *spnego_out,
+ struct spnego_context **spnego_ctx)
+{
+ struct spnego_context *sp_ctx;
+ DATA_BLOB token_in = data_blob_null;
+ DATA_BLOB token_out = data_blob_null;
+ unsigned int i;
+ NTSTATUS status;
+ bool ret;
+
+ if (!spnego_in->length) {
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+
+ status = spnego_init_server(mem_ctx, do_sign, do_seal, is_dcerpc, &sp_ctx);
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
+ }
+
+ ret = spnego_parse_negTokenInit(sp_ctx, *spnego_in,
+ sp_ctx->oid_list, NULL, &token_in);
+ if (!ret) {
+ DEBUG(3, ("Invalid SPNEGO message\n"));
+ status = NT_STATUS_INVALID_PARAMETER;
+ goto done;
+ }
+
+ /* try for krb auth first */
+ for (i = 0; sp_ctx->oid_list[i] && sp_ctx->mech == SPNEGO_NONE; i++) {
+ if (strcmp(OID_KERBEROS5, sp_ctx->oid_list[i]) == 0 ||
+ strcmp(OID_KERBEROS5_OLD, sp_ctx->oid_list[i]) == 0) {
+
+ if (lp_security() == SEC_ADS || USE_KERBEROS_KEYTAB) {
+ sp_ctx->mech = SPNEGO_KRB5;
+ sp_ctx->mech_oid = sp_ctx->oid_list[i];
+ }
+ }
+ }
+
+ /* if auth type still undetermined, try for NTLMSSP */
+ for (i = 0; sp_ctx->oid_list[i] && sp_ctx->mech == SPNEGO_NONE; i++) {
+ if (strcmp(OID_NTLMSSP, sp_ctx->oid_list[i]) == 0) {
+ sp_ctx->mech = SPNEGO_NTLMSSP;
+ sp_ctx->mech_oid = sp_ctx->oid_list[i];
+ }
+ }
+
+ if (!sp_ctx->mech_oid) {
+ DEBUG(3, ("No known mechanisms available\n"));
+ status = NT_STATUS_INVALID_PARAMETER;
+ goto done;
+ }
+
+ if (DEBUGLEVEL >= 10) {
+ DEBUG(10, ("Client Provided OIDs:\n"));
+ for (i = 0; sp_ctx->oid_list[i]; i++) {
+ DEBUG(10, (" %d: %s\n", i, sp_ctx->oid_list[i]));
+ }
+ DEBUG(10, ("Chosen OID: %s\n", sp_ctx->mech_oid));
+ }
+
+ /* If it is not the first OID, then token_in is not valid for the
+ * choosen mech */
+ if (sp_ctx->mech_oid != sp_ctx->oid_list[0]) {
+ /* request more and send back empty token */
+ status = NT_STATUS_MORE_PROCESSING_REQUIRED;
+ sp_ctx->state = SPNEGO_CONV_NEGO;
+ goto done;
+ }
+
+ status = spnego_server_mech_init(sp_ctx, &token_in, &token_out);
+ if (!NT_STATUS_IS_OK(status)) {
+ goto done;
+ }
+
+ DEBUG(10, ("SPNEGO(%d) auth started\n", sp_ctx->mech));
+
+ /* server always need at least one reply from client */
+ status = NT_STATUS_MORE_PROCESSING_REQUIRED;
+ sp_ctx->state = SPNEGO_CONV_AUTH_MORE;
+
+done:
+ *spnego_out = spnego_gen_auth_response(mem_ctx, &token_out,
+ status, sp_ctx->mech_oid);
+ if (!spnego_out->data) {
+ status = NT_STATUS_INVALID_PARAMETER;
+ TALLOC_FREE(sp_ctx);
+ } else {
+ status = NT_STATUS_OK;
+ *spnego_ctx = sp_ctx;
+ }
+
+ data_blob_free(&token_in);
+ data_blob_free(&token_out);
+
+ return status;
+}
diff --git a/source3/rpc_server/dcesrv_spnego.h b/source3/rpc_server/dcesrv_spnego.h
new file mode 100644
index 0000000000..eeb865d805
--- /dev/null
+++ b/source3/rpc_server/dcesrv_spnego.h
@@ -0,0 +1,37 @@
+/*
+ * SPNEGO Encapsulation
+ * Server routines
+ * Copyright (C) Simo Sorce 2010.
+ *
+ * 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 _DCESRV_SPNEGO_H_
+#define _DCESRV_SPENGO_H_
+
+#include "librpc/crypto/spnego.h"
+
+NTSTATUS spnego_server_auth_start(TALLOC_CTX *mem_ctx,
+ bool do_sign,
+ bool do_seal,
+ bool is_dcerpc,
+ DATA_BLOB *spnego_in,
+ DATA_BLOB *spnego_out,
+ struct spnego_context **spnego_ctx);
+NTSTATUS spnego_server_step(struct spnego_context *sp_ctx,
+ TALLOC_CTX *mem_ctx,
+ DATA_BLOB *spnego_in,
+ DATA_BLOB *spnego_out);
+
+#endif /* _DCESRV_SPENGO_H_ */
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