r995: - renamed many of our crypto routines to use the industry standard

  names rather than our crazy naming scheme. So DES is now called
  des_crypt() rather than smbhash()

- added the code from the solution of the ADS crypto challenge that
  allows Samba to correctly handle a 128 bit session key in all of the
  netr_ServerAuthenticateX() varients. A huge thanks to Luke Howard
  from PADL for solving this one!

- restructured the server side rpc authentication to allow for other
  than NTLMSSP sign and seal. This commit just adds the structure, the
  next commit will add schannel server side support.

- added 128 bit session key support to our client side code, and
  testing against w2k3 with smbtorture. Works well.
(This used to be commit 729b2f41c924a0b435d44a14209e6dacc2304cee)

1 files changed, 122 insertions, 0 deletions

diff --git a/source4/rpc_server/dcesrv_crypto.c b/source4/rpc_server/dcesrv_crypto.c
new file mode 100644
index 0000000000..64ff4ee30b
--- /dev/null
+++ b/source4/rpc_server/dcesrv_crypto.c
@@ -0,0 +1,122 @@
+/* 
+   Unix SMB/CIFS implementation.
+
+   server side dcerpc authentication code - crypto support
+
+   Copyright (C) Andrew Tridgell 2004
+
+   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 2 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, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+/*
+  this provides a crypto interface to the various backends (such as
+  NTLMSSP and SCHANNEL) for the rpc server code
+*/
+
+#include "includes.h"
+
+/*
+  startup the cryptographic side of an authenticated dcerpc server
+*/
+NTSTATUS dcesrv_crypto_startup(struct dcesrv_connection *dce_conn,
+			       struct dcesrv_auth *auth)
+{
+	struct auth_ntlmssp_state *ntlmssp = NULL;
+	NTSTATUS status;
+
+	if (auth->auth_info->auth_level != DCERPC_AUTH_LEVEL_INTEGRITY &&
+	    auth->auth_info->auth_level != DCERPC_AUTH_LEVEL_PRIVACY) {
+		DEBUG(2,("auth_level %d not supported in dcesrv auth\n", 
+			 auth->auth_info->auth_level));
+		return NT_STATUS_INVALID_PARAMETER;
+	}
+
+	switch (auth->auth_info->auth_type) {
+/*
+	case DCERPC_AUTH_TYPE_SCHANNEL:
+		return auth_schannel_start();
+*/
+
+	case DCERPC_AUTH_TYPE_NTLMSSP:
+		status = auth_ntlmssp_start(&ntlmssp);
+		auth->crypto_state = ntlmssp;
+		break;
+
+	default:
+		DEBUG(2,("dcesrv auth_type %d not supported\n", auth->auth_info->auth_type));
+		status = NT_STATUS_INVALID_PARAMETER;
+	}
+
+	DEBUG(4,("dcesrv_crypto_startup: %s\n", nt_errstr(status)));
+
+	return status;
+}
+
+/*
+  update crypto state
+*/
+NTSTATUS dcesrv_crypto_update(struct dcesrv_auth *auth, 
+			      TALLOC_CTX *out_mem_ctx, 
+			      const DATA_BLOB in, DATA_BLOB *out) 
+{
+	AUTH_NTLMSSP_STATE *ntlmssp = auth->crypto_state;
+
+	return ntlmssp_update(ntlmssp->ntlmssp_state, out_mem_ctx, in, out);
+}
+
+
+/*
+  seal a packet
+*/
+NTSTATUS dcesrv_crypto_seal(struct dcesrv_auth *auth, 
+			    TALLOC_CTX *sig_mem_ctx, uint8_t *data, size_t length, DATA_BLOB *sig)
+{
+	AUTH_NTLMSSP_STATE *ntlmssp = auth->crypto_state;
+
+	return ntlmssp_seal_packet(ntlmssp->ntlmssp_state, sig_mem_ctx, data, length, sig);
+}
+
+/*
+  sign a packet
+*/
+NTSTATUS dcesrv_crypto_sign(struct dcesrv_auth *auth, 
+			    TALLOC_CTX *sig_mem_ctx, const uint8_t *data, size_t length, DATA_BLOB *sig) 
+{
+	AUTH_NTLMSSP_STATE *ntlmssp = auth->crypto_state;
+
+	return ntlmssp_sign_packet(ntlmssp->ntlmssp_state, sig_mem_ctx, data, length, sig);
+}
+
+/*
+  check a packet signature
+*/
+NTSTATUS dcesrv_crypto_check_sig(struct dcesrv_auth *auth, 
+				 TALLOC_CTX *sig_mem_ctx, const uint8_t *data, size_t length, const DATA_BLOB *sig)
+{
+	AUTH_NTLMSSP_STATE *ntlmssp = auth->crypto_state;
+
+	return ntlmssp_check_packet(ntlmssp->ntlmssp_state, sig_mem_ctx, data, length, sig);
+}
+
+/*
+  unseal a packet
+*/
+NTSTATUS dcesrv_crypto_unseal(struct dcesrv_auth *auth, 
+			       TALLOC_CTX *sig_mem_ctx, uint8_t *data, size_t length, DATA_BLOB *sig)
+{
+	AUTH_NTLMSSP_STATE *ntlmssp = auth->crypto_state;
+
+	return ntlmssp_unseal_packet(ntlmssp->ntlmssp_state, sig_mem_ctx, data, length, sig);
+}