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-rw-r--r--source3/librpc/rpc/dcerpc_spnego.c235
-rw-r--r--source3/librpc/rpc/dcerpc_spnego.h42
2 files changed, 277 insertions, 0 deletions
diff --git a/source3/librpc/rpc/dcerpc_spnego.c b/source3/librpc/rpc/dcerpc_spnego.c
new file mode 100644
index 0000000000..51d294de5e
--- /dev/null
+++ b/source3/librpc/rpc/dcerpc_spnego.c
@@ -0,0 +1,235 @@
+/*
+ * SPNEGO Encapsulation
+ * RPC Pipe client 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/>.
+ */
+
+#include "includes.h"
+#include "../libcli/auth/spnego.h"
+#include "dcerpc_spnego.h"
+#include "dcerpc_gssapi.h"
+
+struct spnego_context {
+ enum dcerpc_AuthType auth_type;
+
+ union {
+ struct auth_ntlmssp_state *auth_ntlmssp_state;
+ struct gse_context *gssapi_state;
+ } mech_ctx;
+
+ enum {
+ SPNEGO_CONV_INIT = 0,
+ SPNEGO_CONV_AUTH_MORE,
+ SPNEGO_CONV_AUTH_CONFIRM,
+ SPNEGO_CONV_AUTH_DONE
+ } state;
+};
+
+static NTSTATUS spnego_context_init(TALLOC_CTX *mem_ctx,
+ enum dcerpc_AuthType auth_type,
+ struct spnego_context **spnego_ctx)
+{
+ struct spnego_context *sp_ctx;
+
+ sp_ctx = talloc_zero(mem_ctx, struct spnego_context);
+ if (!sp_ctx) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ sp_ctx->auth_type = auth_type;
+ sp_ctx->state = SPNEGO_CONV_INIT;
+
+ *spnego_ctx = sp_ctx;
+ return NT_STATUS_OK;
+}
+
+NTSTATUS spnego_gssapi_init_client(TALLOC_CTX *mem_ctx,
+ enum dcerpc_AuthLevel auth_level,
+ const char *ccache_name,
+ const char *server,
+ const char *service,
+ const char *username,
+ const char *password,
+ uint32_t add_gss_c_flags,
+ struct spnego_context **spnego_ctx)
+{
+ struct spnego_context *sp_ctx;
+ NTSTATUS status;
+
+ status = spnego_context_init(mem_ctx,
+ DCERPC_AUTH_TYPE_KRB5, &sp_ctx);
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
+ }
+
+ status = gse_init_client(sp_ctx, DCERPC_AUTH_TYPE_KRB5, auth_level,
+ ccache_name, server, service,
+ username, password, add_gss_c_flags,
+ &sp_ctx->mech_ctx.gssapi_state);
+ if (!NT_STATUS_IS_OK(status)) {
+ TALLOC_FREE(sp_ctx);
+ return status;
+ }
+
+ *spnego_ctx = sp_ctx;
+ return NT_STATUS_OK;
+}
+
+NTSTATUS spnego_get_client_auth_token(TALLOC_CTX *mem_ctx,
+ struct spnego_context *sp_ctx,
+ DATA_BLOB *spnego_in,
+ DATA_BLOB *spnego_out)
+{
+ struct gse_context *gse_ctx;
+ struct spnego_data sp_in, sp_out;
+ DATA_BLOB token_in = data_blob_null;
+ DATA_BLOB token_out = data_blob_null;
+ const char *mech_oids[2] = { NULL, NULL };
+ char *principal = NULL;
+ ssize_t len_in = 0;
+ ssize_t len_out = 0;
+ bool mech_wants_more = false;
+ NTSTATUS status;
+
+ if (!spnego_in->length) {
+ /* server didn't send anything, is init ? */
+ if (sp_ctx->state != SPNEGO_CONV_INIT) {
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+ } else {
+ len_in = spnego_read_data(mem_ctx, *spnego_in, &sp_in);
+ if (len_in == -1) {
+ status = NT_STATUS_INVALID_PARAMETER;
+ goto done;
+ }
+ if (sp_in.type != SPNEGO_NEG_TOKEN_TARG) {
+ status = NT_STATUS_INVALID_PARAMETER;
+ goto done;
+ }
+ if (sp_in.negTokenTarg.negResult == SPNEGO_REJECT) {
+ status = NT_STATUS_ACCESS_DENIED;
+ goto done;
+ }
+ token_in = sp_in.negTokenTarg.responseToken;
+ }
+
+ if (sp_ctx->state == SPNEGO_CONV_AUTH_CONFIRM) {
+ if (sp_in.negTokenTarg.negResult == SPNEGO_ACCEPT_COMPLETED) {
+ sp_ctx->state = SPNEGO_CONV_AUTH_DONE;
+ status = NT_STATUS_OK;
+ } else {
+ status = NT_STATUS_ACCESS_DENIED;
+ }
+ goto done;
+ }
+
+ switch (sp_ctx->auth_type) {
+ case DCERPC_AUTH_TYPE_KRB5:
+
+ gse_ctx = sp_ctx->mech_ctx.gssapi_state;
+ status = gse_get_client_auth_token(mem_ctx, gse_ctx,
+ &token_in, &token_out);
+ if (!NT_STATUS_IS_OK(status)) {
+ goto done;
+ }
+
+ mech_oids[0] = OID_KERBEROS5;
+ mech_wants_more = gse_require_more_processing(gse_ctx);
+
+ break;
+
+ case DCERPC_AUTH_TYPE_NTLMSSP:
+ status = NT_STATUS_NOT_IMPLEMENTED;
+ goto done;
+ default:
+ status = NT_STATUS_INTERNAL_ERROR;
+ goto done;
+ }
+
+ switch (sp_ctx->state) {
+ case SPNEGO_CONV_INIT:
+ *spnego_out = spnego_gen_negTokenInit(mem_ctx, mech_oids,
+ &token_out, principal);
+ if (!spnego_out->data) {
+ status = NT_STATUS_INTERNAL_ERROR;
+ goto done;
+ }
+ sp_ctx->state = SPNEGO_CONV_AUTH_MORE;
+ break;
+
+ case SPNEGO_CONV_AUTH_MORE:
+ /* server says it's done and we do not seem to agree */
+ if (sp_in.negTokenTarg.negResult ==
+ SPNEGO_ACCEPT_COMPLETED) {
+ status = NT_STATUS_INVALID_PARAMETER;
+ goto done;
+ }
+
+ sp_out.type = SPNEGO_NEG_TOKEN_TARG;
+ sp_out.negTokenTarg.negResult = SPNEGO_NONE_RESULT;
+ sp_out.negTokenTarg.supportedMech = NULL;
+ sp_out.negTokenTarg.responseToken = token_out;
+ sp_out.negTokenTarg.mechListMIC = data_blob_null;
+
+ len_out = spnego_write_data(mem_ctx, spnego_out, &sp_out);
+ if (len_out == -1) {
+ status = NT_STATUS_INTERNAL_ERROR;
+ goto done;
+ }
+
+ if (!mech_wants_more) {
+ /* we still need to get an ack from the server */
+ sp_ctx->state = SPNEGO_CONV_AUTH_CONFIRM;
+ }
+
+ break;
+
+ default:
+ status = NT_STATUS_INTERNAL_ERROR;
+ goto done;
+ }
+
+ status = NT_STATUS_OK;
+
+done:
+ if (len_in > 0) {
+ spnego_free_data(&sp_in);
+ }
+ data_blob_free(&token_out);
+ return status;
+}
+
+bool spnego_require_more_processing(struct spnego_context *sp_ctx)
+{
+ struct gse_context *gse_ctx;
+
+ /* see if spnego processing itself requires more */
+ if (sp_ctx->state == SPNEGO_CONV_AUTH_MORE ||
+ sp_ctx->state == SPNEGO_CONV_AUTH_CONFIRM) {
+ return true;
+ }
+
+ /* otherwise see if underlying mechnism does */
+ switch (sp_ctx->auth_type) {
+ case DCERPC_AUTH_TYPE_KRB5:
+ gse_ctx = sp_ctx->mech_ctx.gssapi_state;
+ return gse_require_more_processing(gse_ctx);
+ default:
+ DEBUG(0, ("Unsupported type in request!\n"));
+ return false;
+ }
+}
+
diff --git a/source3/librpc/rpc/dcerpc_spnego.h b/source3/librpc/rpc/dcerpc_spnego.h
new file mode 100644
index 0000000000..7f48f39498
--- /dev/null
+++ b/source3/librpc/rpc/dcerpc_spnego.h
@@ -0,0 +1,42 @@
+/*
+ * SPNEGO Encapsulation
+ * RPC Pipe client 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 _DCERPC_SPNEGO_H_
+#define _DCERPC_SPENGO_H_
+
+struct spnego_context;
+
+NTSTATUS spnego_gssapi_init_client(TALLOC_CTX *mem_ctx,
+ enum dcerpc_AuthLevel auth_level,
+ const char *ccache_name,
+ const char *server,
+ const char *service,
+ const char *username,
+ const char *password,
+ uint32_t add_gss_c_flags,
+ struct spnego_context **spengo_ctx);
+
+NTSTATUS spnego_get_client_auth_token(TALLOC_CTX *mem_ctx,
+ struct spnego_context *sp_ctx,
+ DATA_BLOB *spnego_in,
+ DATA_BLOB *spnego_out);
+
+bool spnego_require_more_processing(struct spnego_context *sp_ctx);
+
+#endif /* _DCERPC_SPENGO_H_ */
generated by cgit (git 2.34.1) at 2024-11-30 21:32:01 +0000