Add SMB encryption. Still fixing client decrypt but

negotiation works.
Jeremy.
(This used to be commit d78045601af787731f0737b8627450018902b104)

13 files changed, 1070 insertions, 95 deletions

diff --git a/source3/libsmb/cliconnect.c b/source3/libsmb/cliconnect.c
index 33110c803f7..4560521d4a2 100644
--- a/source3/libsmb/cliconnect.c
+++ b/source3/libsmb/cliconnect.c
@@ -98,7 +98,7 @@ static NTSTATUS cli_session_setup_lanman2(struct cli_state *cli,
 
 	/* send a session setup command */
 	memset(cli->outbuf,'\0',smb_size);
-	set_message(cli->outbuf,10, 0, True);
+	cli_set_message(cli->outbuf,10, 0, True);
 	SCVAL(cli->outbuf,smb_com,SMBsesssetupX);
 	cli_setup_packet(cli);
 	
@@ -168,7 +168,7 @@ static NTSTATUS cli_session_setup_guest(struct cli_state *cli)
 	uint32 capabilities = cli_session_setup_capabilities(cli);
 
 	memset(cli->outbuf, '\0', smb_size);
-	set_message(cli->outbuf,13,0,True);
+	cli_set_message(cli->outbuf,13,0,True);
 	SCVAL(cli->outbuf,smb_com,SMBsesssetupX);
 	cli_setup_packet(cli);
 			
@@ -228,7 +228,7 @@ static NTSTATUS cli_session_setup_plaintext(struct cli_state *cli,
 	fstr_sprintf( lanman, "Samba %s", SAMBA_VERSION_STRING);
 
 	memset(cli->outbuf, '\0', smb_size);
-	set_message(cli->outbuf,13,0,True);
+	cli_set_message(cli->outbuf,13,0,True);
 	SCVAL(cli->outbuf,smb_com,SMBsesssetupX);
 	cli_setup_packet(cli);
 			
@@ -377,7 +377,7 @@ static NTSTATUS cli_session_setup_nt1(struct cli_state *cli, const char *user,
 	/* send a session setup command */
 	memset(cli->outbuf,'\0',smb_size);
 
-	set_message(cli->outbuf,13,0,True);
+	cli_set_message(cli->outbuf,13,0,True);
 	SCVAL(cli->outbuf,smb_com,SMBsesssetupX);
 	cli_setup_packet(cli);
 			
@@ -457,7 +457,7 @@ static bool cli_session_setup_blob_send(struct cli_state *cli, DATA_BLOB blob)
 	/* send a session setup command */
 	memset(cli->outbuf,'\0',smb_size);
 
-	set_message(cli->outbuf,12,0,True);
+	cli_set_message(cli->outbuf,12,0,True);
 	SCVAL(cli->outbuf,smb_com,SMBsesssetupX);
 
 	cli_setup_packet(cli);
@@ -1028,7 +1028,7 @@ NTSTATUS cli_session_setup(struct cli_state *cli,
 bool cli_ulogoff(struct cli_state *cli)
 {
 	memset(cli->outbuf,'\0',smb_size);
-	set_message(cli->outbuf,2,0,True);
+	cli_set_message(cli->outbuf,2,0,True);
 	SCVAL(cli->outbuf,smb_com,SMBulogoffX);
 	cli_setup_packet(cli);
 	SSVAL(cli->outbuf,smb_vwv0,0xFF);
@@ -1106,7 +1106,7 @@ bool cli_send_tconX(struct cli_state *cli,
 	slprintf(fullshare, sizeof(fullshare)-1,
 		 "\\\\%s\\%s", cli->desthost, share);
 
-	set_message(cli->outbuf,4, 0, True);
+	cli_set_message(cli->outbuf,4, 0, True);
 	SCVAL(cli->outbuf,smb_com,SMBtconX);
 	cli_setup_packet(cli);
 
@@ -1157,7 +1157,7 @@ bool cli_send_tconX(struct cli_state *cli,
 bool cli_tdis(struct cli_state *cli)
 {
 	memset(cli->outbuf,'\0',smb_size);
-	set_message(cli->outbuf,0,0,True);
+	cli_set_message(cli->outbuf,0,0,True);
 	SCVAL(cli->outbuf,smb_com,SMBtdis);
 	SSVAL(cli->outbuf,smb_tid,cli->cnum);
 	cli_setup_packet(cli);
@@ -1189,7 +1189,7 @@ void cli_negprot_send(struct cli_state *cli)
 	memset(cli->outbuf,'\0',smb_size);
 
 	/* setup the protocol strings */
-	set_message(cli->outbuf,0,0,True);
+	cli_set_message(cli->outbuf,0,0,True);
 
 	p = smb_buf(cli->outbuf);
 	for (numprots=0;
@@ -1229,7 +1229,7 @@ bool cli_negprot(struct cli_state *cli)
 	     numprots++)
 		plength += strlen(prots[numprots].name)+2;
     
-	set_message(cli->outbuf,0,plength,True);
+	cli_set_message(cli->outbuf,0,plength,True);
 
 	p = smb_buf(cli->outbuf);
 	for (numprots=0;
@@ -1806,7 +1806,7 @@ NTSTATUS cli_raw_tcon(struct cli_state *cli,
 	memset(cli->outbuf,'\0',smb_size);
 	memset(cli->inbuf,'\0',smb_size);
 
-	set_message(cli->outbuf, 0, 0, True);
+	cli_set_message(cli->outbuf, 0, 0, True);
 	SCVAL(cli->outbuf,smb_com,SMBtcon);
 	cli_setup_packet(cli);
 
diff --git a/source3/libsmb/clidgram.c b/source3/libsmb/clidgram.c
index 76630bd5042..66c6ee10228 100644
--- a/source3/libsmb/clidgram.c
+++ b/source3/libsmb/clidgram.c
@@ -81,7 +81,7 @@ bool cli_send_mailslot(struct messaging_context *msg_ctx,
 		return False;
 	}
 
-	set_message(ptr,17,strlen(mailslot) + 1 + len,True);
+	cli_set_message(ptr,17,strlen(mailslot) + 1 + len,True);
 	memcpy(ptr,tmp,4);
 
 	SCVAL(ptr,smb_com,SMBtrans);
diff --git a/source3/libsmb/clientgen.c b/source3/libsmb/clientgen.c
index 0544b3d879c..da225ebc246 100644
--- a/source3/libsmb/clientgen.c
+++ b/source3/libsmb/clientgen.c
@@ -20,6 +20,21 @@
 
 #include "includes.h"
 
+/*******************************************************************
+ Setup the word count and byte count for a client smb message.
+********************************************************************/
+
+int cli_set_message(char *buf,int num_words,int num_bytes,bool zero)
+{
+	if (zero && (num_words || num_bytes)) {
+		memset(buf + smb_size,'\0',num_words*2 + num_bytes);
+	}
+	SCVAL(buf,smb_wct,num_words);
+	SSVAL(buf,smb_vwv + num_words*SIZEOFWORD,num_bytes);
+	smb_setlen(buf,smb_size + num_words*2 + num_bytes - 4);
+	return (smb_size + num_words*2 + num_bytes);
+}
+
 /****************************************************************************
  Change the timeout (in milliseconds).
 ****************************************************************************/
@@ -85,7 +100,7 @@ bool cli_receive_smb(struct cli_state *cli)
 
 	/* fd == -1 causes segfaults -- Tom (tom@ninja.nl) */
 	if (cli->fd == -1)
-		return False; 
+		return false; 
 
  again:
 	len = client_receive_smb(cli, 0);
@@ -100,7 +115,7 @@ bool cli_receive_smb(struct cli_state *cli)
 				int fnum = SVAL(cli->inbuf,smb_vwv2);
 				unsigned char level = CVAL(cli->inbuf,smb_vwv3+1);
 				if (!cli->oplock_handler(cli, fnum, level)) {
-					return False;
+					return false;
 				}
 			}
 			/* try to prevent loops */
@@ -114,7 +129,7 @@ bool cli_receive_smb(struct cli_state *cli)
                 DEBUG(0, ("Receiving SMB: Server stopped responding\n"));
 		close(cli->fd);
 		cli->fd = -1;
-		return False;
+		return false;
 	}
 
 	if (!cli_check_sign_mac(cli)) {
@@ -135,16 +150,16 @@ bool cli_receive_smb(struct cli_state *cli)
 			 * Set bad sig but don't close fd.
 			 */
 			cli->smb_rw_error = SMB_READ_BAD_SIG;
-			return True;
+			return true;
 		}
 
 		DEBUG(0, ("SMB Signature verification failed on incoming packet!\n"));
 		cli->smb_rw_error = SMB_READ_BAD_SIG;
 		close(cli->fd);
 		cli->fd = -1;
-		return False;
+		return false;
 	};
-	return True;
+	return true;
 }
 
 /****************************************************************************
@@ -164,6 +179,7 @@ ssize_t cli_receive_smb_data(struct cli_state *cli, char *buffer, size_t len)
 
 /****************************************************************************
  Read a smb readX header.
+ We can only use this if encryption and signing are off.
 ****************************************************************************/
 
 bool cli_receive_smb_readX_header(struct cli_state *cli)
@@ -171,7 +187,7 @@ bool cli_receive_smb_readX_header(struct cli_state *cli)
 	ssize_t len, offset;
 
 	if (cli->fd == -1)
-		return False; 
+		return false; 
 
  again:
 
@@ -199,7 +215,7 @@ bool cli_receive_smb_readX_header(struct cli_state *cli)
 			if (cli->oplock_handler) {
 				int fnum = SVAL(cli->inbuf,smb_vwv2);
 				unsigned char level = CVAL(cli->inbuf,smb_vwv3+1);
-				if (!cli->oplock_handler(cli, fnum, level)) return False;
+				if (!cli->oplock_handler(cli, fnum, level)) return false;
 			}
 			/* try to prevent loops */
 			SCVAL(cli->inbuf,smb_com,0xFF);
@@ -238,14 +254,14 @@ bool cli_receive_smb_readX_header(struct cli_state *cli)
 		}
 	}
 
-	return True;
+	return true;
 
   read_err:
 
 	cli->smb_rw_error = SMB_READ_ERROR;
 	close(cli->fd);
 	cli->fd = -1;
-	return False;
+	return false;
 }
 
 static ssize_t write_socket(int fd, const char *buf, size_t len)
@@ -272,32 +288,54 @@ bool cli_send_smb(struct cli_state *cli)
 	size_t len;
 	size_t nwritten=0;
 	ssize_t ret;
+	char *buf_out = cli->outbuf;
+	bool enc_on = cli_encryption_on(cli);
 
 	/* fd == -1 causes segfaults -- Tom (tom@ninja.nl) */
 	if (cli->fd == -1)
-		return False;
+		return false;
 
 	cli_calculate_sign_mac(cli);
 
-	len = smb_len(cli->outbuf) + 4;
+	if (enc_on) {
+		NTSTATUS status = cli_encrypt_message(cli, &buf_out);
+		if (!NT_STATUS_IS_OK(status)) {
+			close(cli->fd);
+			cli->fd = -1;
+			cli->smb_rw_error = SMB_WRITE_ERROR;
+			DEBUG(0,("Error in encrypting client message. Error %s\n",
+				nt_errstr(status) ));
+			return false;
+		}
+	}
+
+	len = smb_len(buf_out) + 4;
 
 	while (nwritten < len) {
-		ret = write_socket(cli->fd,cli->outbuf+nwritten,len - nwritten);
+		ret = write_socket(cli->fd,buf_out+nwritten,len - nwritten);
 		if (ret <= 0) {
+			if (enc_on) {
+				cli_free_enc_buffer(cli, buf_out);
+			}
 			close(cli->fd);
 			cli->fd = -1;
 			cli->smb_rw_error = SMB_WRITE_ERROR;
 			DEBUG(0,("Error writing %d bytes to client. %d (%s)\n",
 				(int)len,(int)ret, strerror(errno) ));
-			return False;
+			return false;
 		}
 		nwritten += ret;
 	}
+
+	if (enc_on) {
+		cli_free_enc_buffer(cli, buf_out);
+	}
+
 	/* Increment the mid so we can tell between responses. */
 	cli->mid++;
 	if (!cli->mid)
 		cli->mid++;
-	return True;
+	return true;
 }
 
 /****************************************************************************
@@ -347,7 +385,7 @@ bool cli_send_smb_direct_writeX(struct cli_state *cli,
 			DEBUG(0,("Error writing %d extradata "
 				"bytes to client. %d (%s)\n",
 				(int)extradata,(int)ret, strerror(errno) ));
-			return False;
+			return false;
 		}
 		nwritten += ret;
 	}
@@ -409,7 +447,7 @@ void cli_init_creds(struct cli_state *cli, const char *username, const char *dom
 	fstrcpy(cli->user_name, username);
 	pwd_set_cleartext(&cli->pwd, password);
 	if (!*username) {
-		cli->pwd.null_pwd = True;
+		cli->pwd.null_pwd = true;
 	}
 
         DEBUG(10,("cli_init_creds: user %s domain %s\n", cli->user_name, cli->domain));
@@ -424,16 +462,16 @@ void cli_setup_signing_state(struct cli_state *cli, int signing_state)
 	if (signing_state == Undefined)
 		return;
 
-	if (signing_state == False) {
-		cli->sign_info.allow_smb_signing = False;
-		cli->sign_info.mandatory_signing = False;
+	if (signing_state == false) {
+		cli->sign_info.allow_smb_signing = false;
+		cli->sign_info.mandatory_signing = false;
 		return;
 	}
 
-	cli->sign_info.allow_smb_signing = True;
+	cli->sign_info.allow_smb_signing = true;
 
 	if (signing_state == Required) 
-		cli->sign_info.mandatory_signing = True;
+		cli->sign_info.mandatory_signing = true;
 }
 
 /****************************************************************************
@@ -470,7 +508,7 @@ struct cli_state *cli_initialise(void)
 	cli->outbuf = (char *)SMB_MALLOC(cli->bufsize+SAFETY_MARGIN);
 	cli->inbuf = (char *)SMB_MALLOC(cli->bufsize+SAFETY_MARGIN);
 	cli->oplock_handler = cli_oplock_ack;
-	cli->case_sensitive = False;
+	cli->case_sensitive = false;
 	cli->smb_rw_error = SMB_READ_OK;
 
 	cli->use_spnego = lp_client_use_spnego();
@@ -481,13 +519,13 @@ struct cli_state *cli_initialise(void)
 	   client routines using DOS errors instead of STATUS32
 	   ones.  This intended only as a temporary hack. */	
 	if (getenv("CLI_FORCE_DOSERR"))
-		cli->force_dos_errors = True;
+		cli->force_dos_errors = true;
 
 	if (lp_client_signing()) 
-		cli->sign_info.allow_smb_signing = True;
+		cli->sign_info.allow_smb_signing = true;
 
 	if (lp_client_signing() == Required) 
-		cli->sign_info.mandatory_signing = True;
+		cli->sign_info.mandatory_signing = true;
                                    
 	if (!cli->outbuf || !cli->inbuf)
                 goto error;
@@ -522,7 +560,7 @@ struct cli_state *cli_initialise(void)
 /****************************************************************************
  External interface.
  Close an open named pipe over SMB. Free any authentication data.
- Returns False if the cli_close call failed.
+ Returns false if the cli_close call failed.
  ****************************************************************************/
 
 bool cli_rpc_pipe_close(struct rpc_pipe_client *cli)
@@ -530,7 +568,7 @@ bool cli_rpc_pipe_close(struct rpc_pipe_client *cli)
 	bool ret;
 
 	if (!cli) {
-		return False;
+		return false;
 	}
 
 	ret = cli_close(cli->cli, cli->fnum);
@@ -650,15 +688,15 @@ bool cli_send_keepalive(struct cli_state *cli)
 {
         if (cli->fd == -1) {
                 DEBUG(3, ("cli_send_keepalive: fd == -1\n"));
-                return False;
+                return false;
         }
         if (!send_keepalive(cli->fd)) {
                 close(cli->fd);
                 cli->fd = -1;
                 DEBUG(0,("Error sending keepalive packet to client.\n"));
-                return False;
+                return false;
         }
-        return True;
+        return true;
 }
 
 /****************************************************************************
@@ -674,7 +712,7 @@ bool cli_echo(struct cli_state *cli, uint16 num_echos,
 	SMB_ASSERT(length < 1024);
 
 	memset(cli->outbuf,'\0',smb_size);
-	set_message(cli->outbuf,1,length,True);
+	cli_set_message(cli->outbuf,1,length,true);
 	SCVAL(cli->outbuf,smb_com,SMBecho);
 	SSVAL(cli->outbuf,smb_tid,65535);
 	SSVAL(cli->outbuf,smb_vwv0,num_echos);
@@ -689,13 +727,13 @@ bool cli_echo(struct cli_state *cli, uint16 num_echos,
 
 	for (i=0; i<num_echos; i++) {
 		if (!cli_receive_smb(cli)) {
-			return False;
+			return false;
 		}
 
 		if (cli_is_error(cli)) {
-			return False;
+			return false;
 		}
 	}
 
-	return True;
+	return true;
 }
diff --git a/source3/libsmb/clifile.c b/source3/libsmb/clifile.c
index 001a42d4b9a..9b4c380d407 100644
--- a/source3/libsmb/clifile.c
+++ b/source3/libsmb/clifile.c
@@ -429,7 +429,7 @@ bool cli_rename(struct cli_state *cli, const char *fname_src, const char *fname_
 	memset(cli->outbuf,'\0',smb_size);
 	memset(cli->inbuf,'\0',smb_size);
 
-	set_message(cli->outbuf,1, 0, true);
+	cli_set_message(cli->outbuf,1, 0, true);
 
 	SCVAL(cli->outbuf,smb_com,SMBmv);
 	SSVAL(cli->outbuf,smb_tid,cli->cnum);
@@ -470,7 +470,7 @@ bool cli_ntrename(struct cli_state *cli, const char *fname_src, const char *fnam
 	memset(cli->outbuf,'\0',smb_size);
 	memset(cli->inbuf,'\0',smb_size);
 
-	set_message(cli->outbuf, 4, 0, true);
+	cli_set_message(cli->outbuf, 4, 0, true);
 
 	SCVAL(cli->outbuf,smb_com,SMBntrename);
 	SSVAL(cli->outbuf,smb_tid,cli->cnum);
@@ -512,7 +512,7 @@ bool cli_nt_hardlink(struct cli_state *cli, const char *fname_src, const char *f
 	memset(cli->outbuf,'\0',smb_size);
 	memset(cli->inbuf,'\0',smb_size);
 
-	set_message(cli->outbuf, 4, 0, true);
+	cli_set_message(cli->outbuf, 4, 0, true);
 
 	SCVAL(cli->outbuf,smb_com,SMBntrename);
 	SSVAL(cli->outbuf,smb_tid,cli->cnum);
@@ -554,7 +554,7 @@ bool cli_unlink_full(struct cli_state *cli, const char *fname, uint16 attrs)
 	memset(cli->outbuf,'\0',smb_size);
 	memset(cli->inbuf,'\0',smb_size);
 
-	set_message(cli->outbuf,1, 0, true);
+	cli_set_message(cli->outbuf,1, 0, true);
 
 	SCVAL(cli->outbuf,smb_com,SMBunlink);
 	SSVAL(cli->outbuf,smb_tid,cli->cnum);
@@ -600,7 +600,7 @@ bool cli_mkdir(struct cli_state *cli, const char *dname)
 	memset(cli->outbuf,'\0',smb_size);
 	memset(cli->inbuf,'\0',smb_size);
 
-	set_message(cli->outbuf,0, 0, true);
+	cli_set_message(cli->outbuf,0, 0, true);
 
 	SCVAL(cli->outbuf,smb_com,SMBmkdir);
 	SSVAL(cli->outbuf,smb_tid,cli->cnum);
@@ -636,7 +636,7 @@ bool cli_rmdir(struct cli_state *cli, const char *dname)
 	memset(cli->outbuf,'\0',smb_size);
 	memset(cli->inbuf,'\0',smb_size);
 
-	set_message(cli->outbuf,0, 0, true);
+	cli_set_message(cli->outbuf,0, 0, true);
 
 	SCVAL(cli->outbuf,smb_com,SMBrmdir);
 	SSVAL(cli->outbuf,smb_tid,cli->cnum);
@@ -719,7 +719,7 @@ int cli_nt_create_full(struct cli_state *cli, const char *fname,
 	memset(cli->outbuf,'\0',smb_size);
 	memset(cli->inbuf,'\0',smb_size);
 
-	set_message(cli->outbuf,24,0, true);
+	cli_set_message(cli->outbuf,24,0, true);
 
 	SCVAL(cli->outbuf,smb_com,SMBntcreateX);
 	SSVAL(cli->outbuf,smb_tid,cli->cnum);
@@ -815,7 +815,7 @@ int cli_open(struct cli_state *cli, const char *fname, int flags, int share_mode
 	memset(cli->outbuf,'\0',smb_size);
 	memset(cli->inbuf,'\0',smb_size);
 
-	set_message(cli->outbuf,15,0, true);
+	cli_set_message(cli->outbuf,15,0, true);
 
 	SCVAL(cli->outbuf,smb_com,SMBopenX);
 	SSVAL(cli->outbuf,smb_tid,cli->cnum);
@@ -863,7 +863,7 @@ bool cli_close(struct cli_state *cli, int fnum)
 	memset(cli->outbuf,'\0',smb_size);
 	memset(cli->inbuf,'\0',smb_size);
 
-	set_message(cli->outbuf,3,0,True);
+	cli_set_message(cli->outbuf,3,0,True);
 
 	SCVAL(cli->outbuf,smb_com,SMBclose);
 	SSVAL(cli->outbuf,smb_tid,cli->cnum);
@@ -896,7 +896,7 @@ NTSTATUS cli_locktype(struct cli_state *cli, int fnum,
 	memset(cli->outbuf,'\0',smb_size);
 	memset(cli->inbuf,'\0', smb_size);
 
-	set_message(cli->outbuf,8,0,True);
+	cli_set_message(cli->outbuf,8,0,True);
 
 	SCVAL(cli->outbuf,smb_com,SMBlockingX);
 	SSVAL(cli->outbuf,smb_tid,cli->cnum);
@@ -948,7 +948,7 @@ bool cli_lock(struct cli_state *cli, int fnum,
 	memset(cli->outbuf,'\0',smb_size);
 	memset(cli->inbuf,'\0', smb_size);
 
-	set_message(cli->outbuf,8,0,True);
+	cli_set_message(cli->outbuf,8,0,True);
 
 	SCVAL(cli->outbuf,smb_com,SMBlockingX);
 	SSVAL(cli->outbuf,smb_tid,cli->cnum);
@@ -1001,7 +1001,7 @@ bool cli_unlock(struct cli_state *cli, int fnum, uint32 offset, uint32 len)
 	memset(cli->outbuf,'\0',smb_size);
 	memset(cli->inbuf,'\0',smb_size);
 
-	set_message(cli->outbuf,8,0,True);
+	cli_set_message(cli->outbuf,8,0,True);
 
 	SCVAL(cli->outbuf,smb_com,SMBlockingX);
 	SSVAL(cli->outbuf,smb_tid,cli->cnum);
@@ -1053,7 +1053,7 @@ bool cli_lock64(struct cli_state *cli, int fnum,
 	memset(cli->outbuf,'\0',smb_size);
 	memset(cli->inbuf,'\0', smb_size);
 
-	set_message(cli->outbuf,8,0,True);
+	cli_set_message(cli->outbuf,8,0,True);
 
 	SCVAL(cli->outbuf,smb_com,SMBlockingX);
 	SSVAL(cli->outbuf,smb_tid,cli->cnum);
@@ -1108,7 +1108,7 @@ bool cli_unlock64(struct cli_state *cli, int fnum, SMB_BIG_UINT offset, SMB_BIG_
 	memset(cli->outbuf,'\0',smb_size);
 	memset(cli->inbuf,'\0',smb_size);
 
-	set_message(cli->outbuf,8,0,True);
+	cli_set_message(cli->outbuf,8,0,True);
 
 	SCVAL(cli->outbuf,smb_com,SMBlockingX);
 	SSVAL(cli->outbuf,smb_tid,cli->cnum);
@@ -1255,7 +1255,7 @@ bool cli_getattrE(struct cli_state *cli, int fd,
 	memset(cli->outbuf,'\0',smb_size);
 	memset(cli->inbuf,'\0',smb_size);
 
-	set_message(cli->outbuf,1,0,True);
+	cli_set_message(cli->outbuf,1,0,True);
 
 	SCVAL(cli->outbuf,smb_com,SMBgetattrE);
 	SSVAL(cli->outbuf,smb_tid,cli->cnum);
@@ -1307,7 +1307,7 @@ bool cli_getatr(struct cli_state *cli, const char *fname,
 	memset(cli->outbuf,'\0',smb_size);
 	memset(cli->inbuf,'\0',smb_size);
 
-	set_message(cli->outbuf,0,0,True);
+	cli_set_message(cli->outbuf,0,0,True);
 
 	SCVAL(cli->outbuf,smb_com,SMBgetatr);
 	SSVAL(cli->outbuf,smb_tid,cli->cnum);
@@ -1359,7 +1359,7 @@ bool cli_setattrE(struct cli_state *cli, int fd,
 	memset(cli->outbuf,'\0',smb_size);
 	memset(cli->inbuf,'\0',smb_size);
 
-	set_message(cli->outbuf,7,0,True);
+	cli_set_message(cli->outbuf,7,0,True);
 
 	SCVAL(cli->outbuf,smb_com,SMBsetattrE);
 	SSVAL(cli->outbuf,smb_tid,cli->cnum);
@@ -1398,7 +1398,7 @@ bool cli_setatr(struct cli_state *cli, const char *fname, uint16 attr, time_t t)
 	memset(cli->outbuf,'\0',smb_size);
 	memset(cli->inbuf,'\0',smb_size);
 
-	set_message(cli->outbuf,8,0,True);
+	cli_set_message(cli->outbuf,8,0,True);
 
 	SCVAL(cli->outbuf,smb_com,SMBsetatr);
 	SSVAL(cli->outbuf,smb_tid,cli->cnum);
@@ -1452,7 +1452,7 @@ bool cli_chkpath(struct cli_state *cli, const char *path)
 	}
 
 	memset(cli->outbuf,'\0',smb_size);
-	set_message(cli->outbuf,0,0,True);
+	cli_set_message(cli->outbuf,0,0,True);
 	SCVAL(cli->outbuf,smb_com,SMBcheckpath);
 	SSVAL(cli->outbuf,smb_tid,cli->cnum);
 	cli_setup_packet(cli);
@@ -1483,7 +1483,7 @@ bool cli_chkpath(struct cli_state *cli, const char *path)
 bool cli_dskattr(struct cli_state *cli, int *bsize, int *total, int *avail)
 {
 	memset(cli->outbuf,'\0',smb_size);
-	set_message(cli->outbuf,0,0,True);
+	cli_set_message(cli->outbuf,0,0,True);
 	SCVAL(cli->outbuf,smb_com,SMBdskattr);
 	SSVAL(cli->outbuf,smb_tid,cli->cnum);
 	cli_setup_packet(cli);
@@ -1512,7 +1512,7 @@ int cli_ctemp(struct cli_state *cli, const char *path, char **tmp_path)
 	memset(cli->outbuf,'\0',smb_size);
 	memset(cli->inbuf,'\0',smb_size);
 
-	set_message(cli->outbuf,3,0,True);
+	cli_set_message(cli->outbuf,3,0,True);
 
 	SCVAL(cli->outbuf,smb_com,SMBctemp);
 	SSVAL(cli->outbuf,smb_tid,cli->cnum);
@@ -1565,7 +1565,7 @@ NTSTATUS cli_raw_ioctl(struct cli_state *cli, int fnum, uint32 code, DATA_BLOB *
 	memset(cli->outbuf,'\0',smb_size);
 	memset(cli->inbuf,'\0',smb_size);
 
-	set_message(cli->outbuf, 3, 0, True);
+	cli_set_message(cli->outbuf, 3, 0, True);
 	SCVAL(cli->outbuf,smb_com,SMBioctl);
 	cli_setup_packet(cli);
 
diff --git a/source3/libsmb/clifsinfo.c b/source3/libsmb/clifsinfo.c
index 1a75d144b2a..107613c6185 100644
--- a/source3/libsmb/clifsinfo.c
+++ b/source3/libsmb/clifsinfo.c
@@ -2,6 +2,7 @@
    Unix SMB/CIFS implementation.
    FS info functions
    Copyright (C) Stefan (metze) Metzmacher	2003
+   Copyright (C) Jeremy Allison 2007
    
    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
@@ -301,3 +302,335 @@ cleanup:
 
 	return ret;
 }
+
+/******************************************************************************
+ Send/receive the request encryption blob.
+******************************************************************************/
+
+static NTSTATUS enc_blob_send_receive(struct cli_state *cli, DATA_BLOB *in, DATA_BLOB *out, DATA_BLOB *param_out)
+{
+	uint16 setup;
+	char param[4];
+	char *rparam=NULL, *rdata=NULL;
+	unsigned int rparam_count=0, rdata_count=0;
+	NTSTATUS status = NT_STATUS_OK;
+
+	setup = TRANSACT2_SETFSINFO;
+
+	SSVAL(param,0,0);
+	SSVAL(param,2,SMB_REQUEST_TRANSPORT_ENCRYPTION);
+
+	if (!cli_send_trans(cli, SMBtrans2,
+				NULL,
+				0, 0,
+				&setup, 1, 0,
+				param, 4, 0,
+				(char *)in->data, in->length, CLI_BUFFER_SIZE)) {
+		status = cli_nt_error(cli);
+		goto out;
+	}
+
+	if (!cli_receive_trans(cli, SMBtrans2,
+				&rparam, &rparam_count,
+				&rdata, &rdata_count)) {
+		status = cli_nt_error(cli);
+		goto out;
+	}
+
+	if (cli_is_error(cli)) {
+		status = cli_nt_error(cli);
+		if (!NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
+			goto out;
+		}
+	}
+
+	*out = data_blob(rdata, rdata_count);
+	*param_out = data_blob(rparam, rparam_count);
+
+  out:
+
+	SAFE_FREE(rparam);
+	SAFE_FREE(rdata);
+	return status;
+}
+
+/******************************************************************************
+ Make a client state struct.
+******************************************************************************/
+
+static struct smb_trans_enc_state *make_cli_enc_state(enum smb_trans_enc_type smb_enc_type)
+{
+	struct smb_trans_enc_state *es = NULL;
+	es = SMB_MALLOC_P(struct smb_trans_enc_state);
+	if (!es) {
+		return NULL;
+	}
+	ZERO_STRUCTP(es);
+	es->smb_enc_type = smb_enc_type;
+
+	if (smb_enc_type == SMB_TRANS_ENC_GSS) {
+#if defined(HAVE_GSSAPI) && defined(HAVE_KRB5)
+		es->s.gss_state = SMB_MALLOC_P(struct smb_tran_enc_state_gss);
+		if (!es->s.gss_state) {
+			SAFE_FREE(es);
+			return NULL;
+		}
+		ZERO_STRUCTP(es->s.gss_state);
+#else
+		DEBUG(0,("make_cli_enc_state: no krb5 compiled.\n"));
+		SAFE_FREE(es);
+		return NULL;
+#endif
+	}
+	return es;
+}
+
+/******************************************************************************
+ Start a raw ntlmssp encryption.
+******************************************************************************/
+
+NTSTATUS cli_raw_ntlm_smb_encryption_start(struct cli_state *cli, 
+				const char *user,
+				const char *pass,
+				const char *domain)
+{
+	DATA_BLOB blob_in = data_blob_null;
+	DATA_BLOB blob_out = data_blob_null;
+	DATA_BLOB param_out = data_blob_null;
+	NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
+	struct smb_trans_enc_state *es = make_cli_enc_state(SMB_TRANS_ENC_NTLM);
+
+	if (!es) {
+		return NT_STATUS_NO_MEMORY;
+	}
+	status = ntlmssp_client_start(&es->s.ntlmssp_state);
+	if (!NT_STATUS_IS_OK(status)) {
+		goto fail;
+	}
+
+	ntlmssp_want_feature(es->s.ntlmssp_state, NTLMSSP_FEATURE_SESSION_KEY);
+	es->s.ntlmssp_state->neg_flags |= (NTLMSSP_NEGOTIATE_SIGN|NTLMSSP_NEGOTIATE_SEAL);
+
+	if (!NT_STATUS_IS_OK(status = ntlmssp_set_username(es->s.ntlmssp_state, user))) {
+		goto fail;
+	}
+	if (!NT_STATUS_IS_OK(status = ntlmssp_set_domain(es->s.ntlmssp_state, domain))) {
+		goto fail;
+	}
+	if (!NT_STATUS_IS_OK(status = ntlmssp_set_password(es->s.ntlmssp_state, pass))) {
+		goto fail;
+	}
+
+	do {
+		status = ntlmssp_update(es->s.ntlmssp_state, blob_in, &blob_out);
+		data_blob_free(&blob_in);
+		data_blob_free(&param_out);
+		if (NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED) || NT_STATUS_IS_OK(status)) {
+			NTSTATUS trans_status = enc_blob_send_receive(cli,
+									&blob_out,
+									&blob_in,
+									&param_out);
+			if (!NT_STATUS_EQUAL(trans_status,
+					NT_STATUS_MORE_PROCESSING_REQUIRED) &&
+					!NT_STATUS_IS_OK(trans_status)) {
+				status = trans_status;
+			} else {
+				if (param_out.length == 2) {
+					es->enc_ctx_num = SVAL(param_out.data, 0);
+				}
+			}
+		}
+		data_blob_free(&blob_out);
+	} while (NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED));
+
+	data_blob_free(&blob_in);
+
+	if (NT_STATUS_IS_OK(status)) {
+		/* Replace the old state, if any. */
+		if (cli->trans_enc_state) {
+			common_free_encryption_state(&cli->trans_enc_state);
+		}
+		cli->trans_enc_state = es;
+		cli->trans_enc_state->enc_on = True;
+		es = NULL;
+	}
+
+  fail:
+
+	common_free_encryption_state(&es);
+	return status;
+}
+
+#if defined(HAVE_GSSAPI) && defined(HAVE_KRB5)
+
+#ifndef SMB_GSS_REQUIRED_FLAGS
+#define SMB_GSS_REQUIRED_FLAGS (GSS_C_CONF_FLAG|GSS_C_INTEG_FLAG|GSS_C_MUTUAL_FLAG|GSS_C_REPLAY_FLAG|GSS_C_SEQUENCE_FLAG)
+#endif
+
+/******************************************************************************
+ Get client gss blob to send to a server.
+******************************************************************************/
+
+static NTSTATUS make_cli_gss_blob(struct smb_trans_enc_state *es,
+				const char *service,
+				const char *host,
+				NTSTATUS status_in,
+				DATA_BLOB spnego_blob_in,
+				DATA_BLOB *p_blob_out)
+{
+	const char *krb_mechs[] = {OID_KERBEROS5, NULL};
+	OM_uint32 ret;
+	OM_uint32 min;
+	gss_name_t srv_name;
+	gss_buffer_desc input_name;
+	gss_buffer_desc *p_tok_in;
+	gss_buffer_desc tok_out, tok_in;
+	DATA_BLOB blob_out = data_blob_null;
+	DATA_BLOB blob_in = data_blob_null;
+	char *host_princ_s = NULL;
+	OM_uint32 ret_flags = 0;
+	NTSTATUS status = NT_STATUS_OK;
+
+	gss_OID_desc nt_hostbased_service =
+	{10, CONST_DISCARD(char *,"\x2a\x86\x48\x86\xf7\x12\x01\x02\x01\x04")};
+
+	memset(&tok_out, '\0', sizeof(tok_out));
+
+	/* Get a ticket for the service@host */
+	asprintf(&host_princ_s, "%s@%s", service, host);
+	if (host_princ_s == NULL) {
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	input_name.value = host_princ_s;
+	input_name.length = strlen(host_princ_s) + 1;
+
+	ret = gss_import_name(&min,
+				&input_name,
+				&nt_hostbased_service,
+				&srv_name);
+
+	if (ret != GSS_S_COMPLETE) {
+		SAFE_FREE(host_princ_s);
+		return map_nt_error_from_gss(ret, min);
+	}
+
+	if (spnego_blob_in.length == 0) {
+		p_tok_in = GSS_C_NO_BUFFER;
+	} else {
+		/* Remove the SPNEGO wrapper */
+		if (!spnego_parse_auth_response(spnego_blob_in, status_in, OID_KERBEROS5, &blob_in)) {
+			status = NT_STATUS_UNSUCCESSFUL;
+			goto fail;
+		}
+		tok_in.value = blob_in.data;
+		tok_in.length = blob_in.length;
+		p_tok_in = &tok_in;
+	}
+
+	ret = gss_init_sec_context(&min,
+				GSS_C_NO_CREDENTIAL, /* Use our default cred. */
+				&es->s.gss_state->gss_ctx,
+				srv_name,
+				GSS_C_NO_OID, /* default OID. */
+				GSS_C_MUTUAL_FLAG | GSS_C_REPLAY_FLAG | GSS_C_SEQUENCE_FLAG,
+				GSS_C_INDEFINITE,	/* requested ticket lifetime. */
+				NULL,   /* no channel bindings */
+				p_tok_in,
+				NULL,   /* ignore mech type */
+				&tok_out,
+				&ret_flags,
+				NULL);  /* ignore time_rec */
+
+	status = map_nt_error_from_gss(ret, min);
+	if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status,NT_STATUS_MORE_PROCESSING_REQUIRED)) {
+		ADS_STATUS adss = ADS_ERROR_GSS(ret, min);
+		DEBUG(10,("make_cli_gss_blob: gss_init_sec_context failed with %s\n",
+			ads_errstr(adss)));
+		goto fail;
+	}
+
+	if ((ret_flags & SMB_GSS_REQUIRED_FLAGS) != SMB_GSS_REQUIRED_FLAGS) {
+		status = NT_STATUS_ACCESS_DENIED;
+	}
+
+	blob_out = data_blob(tok_out.value, tok_out.length);
+
+	/* Wrap in an SPNEGO wrapper */
+	*p_blob_out = gen_negTokenTarg(krb_mechs, blob_out);
+
+  fail:
+
+	data_blob_free(&blob_out);
+	data_blob_free(&blob_in);
+	SAFE_FREE(host_princ_s);
+	gss_release_name(&min, &srv_name);
+	if (tok_out.value) {
+		gss_release_buffer(&min, &tok_out);
+	}
+	return status;
+}
+
+/******************************************************************************
+ Start a SPNEGO gssapi encryption context.
+******************************************************************************/
+
+NTSTATUS cli_gss_smb_encryption_start(struct cli_state *cli)
+{
+	DATA_BLOB blob_recv = data_blob_null;
+	DATA_BLOB blob_send = data_blob_null;
+	DATA_BLOB param_out = data_blob_null;
+	NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
+	fstring fqdn;
+	const char *servicename;
+	struct smb_trans_enc_state *es = make_cli_enc_state(SMB_TRANS_ENC_GSS);
+
+	if (!es) {
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	name_to_fqdn(fqdn, cli->desthost);
+	strlower_m(fqdn);
+
+	servicename = "cifs";
+	status = make_cli_gss_blob(es, servicename, fqdn, NT_STATUS_OK, blob_recv, &blob_send);
+	if (!NT_STATUS_EQUAL(status,NT_STATUS_MORE_PROCESSING_REQUIRED)) {
+		servicename = "host";
+		status = make_cli_gss_blob(es, servicename, fqdn, NT_STATUS_OK, blob_recv, &blob_send);
+		if (!NT_STATUS_EQUAL(status,NT_STATUS_MORE_PROCESSING_REQUIRED)) {
+			goto fail;
+		}
+	}
+
+	do {
+		data_blob_free(&blob_recv);
+		status = enc_blob_send_receive(cli, &blob_send, &blob_recv, &param_out);
+		if (param_out.length == 2) {
+			es->enc_ctx_num = SVAL(param_out.data, 0);
+		}
+		data_blob_free(&blob_send);
+		status = make_cli_gss_blob(es, servicename, fqdn, status, blob_recv, &blob_send);
+	} while (NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED));
+	data_blob_free(&blob_recv);
+
+	if (NT_STATUS_IS_OK(status)) {
+		/* Replace the old state, if any. */
+		if (cli->trans_enc_state) {
+			common_free_encryption_state(&cli->trans_enc_state);
+		}
+		cli->trans_enc_state = es;
+		cli->trans_enc_state->enc_on = True;
+		es = NULL;
+	}
+
+  fail:
+
+	common_free_encryption_state(&es);
+	return status;
+}
+#else
+NTSTATUS cli_gss_smb_encryption_start(struct cli_state *cli)
+{
+	return NT_STATUS_NOT_SUPPORTED;
+}
+#endif
diff --git a/source3/libsmb/clilist.c b/source3/libsmb/clilist.c
index 2e4c360507f..d5c7db09e99 100644
--- a/source3/libsmb/clilist.c
+++ b/source3/libsmb/clilist.c
@@ -521,7 +521,7 @@ int cli_list_old(struct cli_state *cli,const char *Mask,uint16 attribute,
 		memset(cli->outbuf,'\0',smb_size);
 		memset(cli->inbuf,'\0',smb_size);
 
-		set_message(cli->outbuf,2,0,True);
+		cli_set_message(cli->outbuf,2,0,True);
 
 		SCVAL(cli->outbuf,smb_com,SMBsearch);
 
@@ -581,7 +581,7 @@ int cli_list_old(struct cli_state *cli,const char *Mask,uint16 attribute,
 		memset(cli->outbuf,'\0',smb_size);
 		memset(cli->inbuf,'\0',smb_size);
 
-		set_message(cli->outbuf,2,0,True);
+		cli_set_message(cli->outbuf,2,0,True);
 		SCVAL(cli->outbuf,smb_com,SMBfclose);
 		SSVAL(cli->outbuf,smb_tid,cli->cnum);
 		cli_setup_packet(cli);
diff --git a/source3/libsmb/climessage.c b/source3/libsmb/climessage.c
index 13ef1d43d42..00c25aa7254 100644
--- a/source3/libsmb/climessage.c
+++ b/source3/libsmb/climessage.c
@@ -29,7 +29,7 @@ int cli_message_start_build(struct cli_state *cli, const char *host, const char
 
 	/* construct a SMBsendstrt command */
 	memset(cli->outbuf,'\0',smb_size);
-	set_message(cli->outbuf,0,0,True);
+	cli_set_message(cli->outbuf,0,0,True);
 	SCVAL(cli->outbuf,smb_com,SMBsendstrt);
 	SSVAL(cli->outbuf,smb_tid,cli->cnum);
 	cli_setup_packet(cli);
@@ -75,7 +75,7 @@ int cli_message_text_build(struct cli_state *cli, const char *msg, int len, int
 	char *p;
 
 	memset(cli->outbuf,'\0',smb_size);
-	set_message(cli->outbuf,1,0,True);
+	cli_set_message(cli->outbuf,1,0,True);
 	SCVAL(cli->outbuf,smb_com,SMBsendtxt);
 	SSVAL(cli->outbuf,smb_tid,cli->cnum);
 	cli_setup_packet(cli);
@@ -132,7 +132,7 @@ int cli_message_end_build(struct cli_state *cli, int grp)
 	char *p;
 
 	memset(cli->outbuf,'\0',smb_size);
-	set_message(cli->outbuf,1,0,True);
+	cli_set_message(cli->outbuf,1,0,True);
 	SCVAL(cli->outbuf,smb_com,SMBsendend);
 	SSVAL(cli->outbuf,smb_tid,cli->cnum);
 
diff --git a/source3/libsmb/clioplock.c b/source3/libsmb/clioplock.c
index 2e54f5a781b..ef8b3964613 100644
--- a/source3/libsmb/clioplock.c
+++ b/source3/libsmb/clioplock.c
@@ -32,7 +32,7 @@ bool cli_oplock_ack(struct cli_state *cli, int fnum, unsigned char level)
 	cli->outbuf = buf;
 
         memset(buf,'\0',smb_size);
-        set_message(buf,8,0,True);
+        cli_set_message(buf,8,0,True);
 
         SCVAL(buf,smb_com,SMBlockingX);
 	SSVAL(buf,smb_tid, cli->cnum);
diff --git a/source3/libsmb/cliprint.c b/source3/libsmb/cliprint.c
index 7fbdb97c016..223ddb41866 100644
--- a/source3/libsmb/cliprint.c
+++ b/source3/libsmb/cliprint.c
@@ -195,7 +195,7 @@ int cli_spl_open(struct cli_state *cli, const char *fname, int flags, int share_
 	memset(cli->outbuf,'\0',smb_size);
 	memset(cli->inbuf,'\0',smb_size);
 
-	set_message(cli->outbuf,15,0,True);
+	cli_set_message(cli->outbuf,15,0,True);
 
 	SCVAL(cli->outbuf,smb_com,SMBsplopen);
 	SSVAL(cli->outbuf,smb_tid,cli->cnum);
@@ -242,7 +242,7 @@ bool cli_spl_close(struct cli_state *cli, int fnum)
 	memset(cli->outbuf,'\0',smb_size);
 	memset(cli->inbuf,'\0',smb_size);
 
-	set_message(cli->outbuf,3,0,True);
+	cli_set_message(cli->outbuf,3,0,True);
 
 	SCVAL(cli->outbuf,smb_com,SMBsplclose);
 	SSVAL(cli->outbuf,smb_tid,cli->cnum);
diff --git a/source3/libsmb/clireadwrite.c b/source3/libsmb/clireadwrite.c
index d77875bae52..0b33e435633 100644
--- a/source3/libsmb/clireadwrite.c
+++ b/source3/libsmb/clireadwrite.c
@@ -34,7 +34,7 @@ static bool cli_issue_read(struct cli_state *cli, int fnum, off_t offset,
 	if ((SMB_BIG_UINT)offset >> 32)
 		bigoffset = True;
 
-	set_message(cli->outbuf,bigoffset ? 12 : 10,0,True);
+	cli_set_message(cli->outbuf,bigoffset ? 12 : 10,0,True);
 
 	SCVAL(cli->outbuf,smb_com,SMBreadX);
 	SSVAL(cli->outbuf,smb_tid,cli->cnum);
@@ -65,8 +65,8 @@ ssize_t cli_read(struct cli_state *cli, int fnum, char *buf, off_t offset, size_
 	size_t size2;
 	size_t readsize;
 	ssize_t total = 0;
-	/* We can only do direct reads if not signing. */
-	bool direct_reads = !client_is_signing_on(cli);
+	/* We can only do direct reads if not signing or encrypting. */
+	bool direct_reads = !client_is_signing_on(cli) && !cli_encryption_on(cli);
 
 	if (size == 0)
 		return 0;
@@ -76,7 +76,9 @@ ssize_t cli_read(struct cli_state *cli, int fnum, char *buf, off_t offset, size_
 	 * rounded down to a multiple of 1024.
 	 */
 
-	if (client_is_signing_on(cli) == False && (cli->posix_capabilities & CIFS_UNIX_LARGE_READ_CAP)) {
+	if (client_is_signing_on(cli) == false &&
+			cli_encryption_on(cli) == false &&
+			(cli->posix_capabilities & CIFS_UNIX_LARGE_READ_CAP)) {
 		readsize = CLI_SAMBA_MAX_POSIX_LARGE_READX_SIZE;
 	} else if (cli->capabilities & CAP_LARGE_READX) {
 		if (cli->is_samba) {
@@ -203,7 +205,7 @@ static bool cli_issue_readraw(struct cli_state *cli, int fnum, off_t offset,
 	memset(cli->outbuf,'\0',smb_size);
 	memset(cli->inbuf,'\0',smb_size);
 
-	set_message(cli->outbuf,10,0,True);
+	cli_set_message(cli->outbuf,10,0,True);
 		
 	SCVAL(cli->outbuf,smb_com,SMBreadbraw);
 	SSVAL(cli->outbuf,smb_tid,cli->cnum);
@@ -295,8 +297,8 @@ static bool cli_issue_write(struct cli_state *cli,
 {
 	char *p;
 	bool large_writex = false;
-	/* We can only do direct writes if not signing. */
-	bool direct_writes = !client_is_signing_on(cli);
+	/* We can only do direct writes if not signing and not encrypting. */
+	bool direct_writes = !client_is_signing_on(cli) && !cli_encryption_on(cli);
 
 	if (!direct_writes && size + 1 > cli->bufsize) {
 		cli->outbuf = (char *)SMB_REALLOC(cli->outbuf, size + 1024);
@@ -319,9 +321,9 @@ static bool cli_issue_write(struct cli_state *cli,
 	}
 
 	if (large_writex) {
-		set_message(cli->outbuf,14,0,True);
+		cli_set_message(cli->outbuf,14,0,True);
 	} else {
-		set_message(cli->outbuf,12,0,True);
+		cli_set_message(cli->outbuf,12,0,True);
 	}
 
 	SCVAL(cli->outbuf,smb_com,SMBwriteX);
@@ -404,16 +406,17 @@ ssize_t cli_write(struct cli_state *cli,
 
         if (write_mode == 0 &&
 			!client_is_signing_on(cli) &&
+			!cli_encryption_on(cli) &&
 			(cli->posix_capabilities & CIFS_UNIX_LARGE_WRITE_CAP) &&
 			(cli->capabilities & CAP_LARGE_FILES)) {
 		/* Only do massive writes if we can do them direct
-		 * with no signing - not on a pipe. */
+		 * with no signing or encrypting - not on a pipe. */
 		writesize = CLI_SAMBA_MAX_POSIX_LARGE_WRITEX_SIZE;
-	} else if (cli->capabilities & CAP_LARGE_READX) {
+	} else if (cli->capabilities & CAP_LARGE_WRITEX) {
 		if (cli->is_samba) {
-			writesize = CLI_SAMBA_MAX_LARGE_READX_SIZE;
+			writesize = CLI_SAMBA_MAX_LARGE_WRITEX_SIZE;
 		} else {
-			writesize = CLI_WINDOWS_MAX_LARGE_READX_SIZE;
+			writesize = CLI_WINDOWS_MAX_LARGE_WRITEX_SIZE;
 		}
 	} else {
 		writesize = (cli->max_xmit - (smb_size+32)) & ~1023;
@@ -471,7 +474,7 @@ ssize_t cli_smbwrite(struct cli_state *cli,
 		memset(cli->outbuf,'\0',smb_size);
 		memset(cli->inbuf,'\0',smb_size);
 
-		set_message(cli->outbuf,5, 0,True);
+		cli_set_message(cli->outbuf,5, 0,True);
 
 		SCVAL(cli->outbuf,smb_com,SMBwrite);
 		SSVAL(cli->outbuf,smb_tid,cli->cnum);
diff --git a/source3/libsmb/clitrans.c b/source3/libsmb/clitrans.c
index a6f7f7fec19..bfb31fdb748 100644
--- a/source3/libsmb/clitrans.c
+++ b/source3/libsmb/clitrans.c
@@ -43,7 +43,7 @@ bool cli_send_trans(struct cli_state *cli, int trans,
 	this_ldata = MIN(ldata,cli->max_xmit - (500+lsetup*2+this_lparam));
 
 	memset(cli->outbuf,'\0',smb_size);
-	set_message(cli->outbuf,14+lsetup,0,True);
+	cli_set_message(cli->outbuf,14+lsetup,0,True);
 	SCVAL(cli->outbuf,smb_com,trans);
 	SSVAL(cli->outbuf,smb_tid, cli->cnum);
 	cli_setup_packet(cli);
@@ -107,7 +107,7 @@ bool cli_send_trans(struct cli_state *cli, int trans,
 			this_lparam = MIN(lparam-tot_param,cli->max_xmit - 500); /* hack */
 			this_ldata = MIN(ldata-tot_data,cli->max_xmit - (500+this_lparam));
 
-			set_message(cli->outbuf,trans==SMBtrans?8:9,0,True);
+			cli_set_message(cli->outbuf,trans==SMBtrans?8:9,0,True);
 			SCVAL(cli->outbuf,smb_com,(trans==SMBtrans ? SMBtranss : SMBtranss2));
 
 			outparam = smb_buf(cli->outbuf);
@@ -368,7 +368,7 @@ bool cli_send_nt_trans(struct cli_state *cli,
 	this_ldata = MIN(ldata,cli->max_xmit - (500+lsetup*2+this_lparam));
 
 	memset(cli->outbuf,'\0',smb_size);
-	set_message(cli->outbuf,19+lsetup,0,True);
+	cli_set_message(cli->outbuf,19+lsetup,0,True);
 	SCVAL(cli->outbuf,smb_com,SMBnttrans);
 	SSVAL(cli->outbuf,smb_tid, cli->cnum);
 	cli_setup_packet(cli);
@@ -424,7 +424,7 @@ bool cli_send_nt_trans(struct cli_state *cli,
 			this_lparam = MIN(lparam-tot_param,cli->max_xmit - 500); /* hack */
 			this_ldata = MIN(ldata-tot_data,cli->max_xmit - (500+this_lparam));
 
-			set_message(cli->outbuf,18,0,True);
+			cli_set_message(cli->outbuf,18,0,True);
 			SCVAL(cli->outbuf,smb_com,SMBnttranss);
 
 			/* XXX - these should probably be aligned */
diff --git a/source3/libsmb/errormap.c b/source3/libsmb/errormap.c
index ce826ae999e..4ec30f7e17f 100644
--- a/source3/libsmb/errormap.c
+++ b/source3/libsmb/errormap.c
@@ -1502,3 +1502,108 @@ WERROR ntstatus_to_werror(NTSTATUS error)
 	/* a lame guess */
 	return W_ERROR(NT_STATUS_V(error) & 0xffff);
 }
+
+#if defined(HAVE_GSSAPI)
+/*******************************************************************************
+ Map between gssapi errors and NT status. I made these up :-(. JRA.
+*******************************************************************************/
+
+static const struct {
+		unsigned long gss_err;
+		NTSTATUS ntstatus;
+} gss_to_ntstatus_errormap[] = {
+#if defined(GSS_S_CALL_INACCESSIBLE_READ)
+		{GSS_S_CALL_INACCESSIBLE_READ, NT_STATUS_INVALID_PARAMETER},
+#endif
+#if defined(GSS_S_CALL_INACCESSIBLE_WRITE)
+		{GSS_S_CALL_INACCESSIBLE_WRITE, NT_STATUS_INVALID_PARAMETER},
+#endif
+#if defined(GSS_S_CALL_BAD_STRUCTURE)
+		{GSS_S_CALL_BAD_STRUCTURE, NT_STATUS_INVALID_PARAMETER},
+#endif
+#if defined(GSS_S_BAD_MECH)
+		{GSS_S_BAD_MECH, NT_STATUS_INVALID_PARAMETER},
+#endif
+#if defined(GSS_S_BAD_NAME)
+		{GSS_S_BAD_NAME, NT_STATUS_INVALID_ACCOUNT_NAME},
+#endif
+#if defined(GSS_S_BAD_NAMETYPE)
+		{GSS_S_BAD_NAMETYPE, NT_STATUS_INVALID_PARAMETER},
+#endif
+#if defined(GSS_S_BAD_BINDINGS)
+		{GSS_S_BAD_BINDINGS, NT_STATUS_INVALID_PARAMETER},
+#endif
+#if defined(GSS_S_BAD_STATUS)
+		{GSS_S_BAD_STATUS, NT_STATUS_UNSUCCESSFUL},
+#endif
+#if defined(GSS_S_BAD_SIG)
+		{GSS_S_BAD_SIG, NT_STATUS_ACCESS_DENIED},
+#endif
+#if defined(GSS_S_NO_CRED)
+		{GSS_S_NO_CRED, NT_STATUS_ACCESS_DENIED},
+#endif
+#if defined(GSS_S_NO_CONTEXT)
+		{GSS_S_NO_CONTEXT, NT_STATUS_ACCESS_DENIED},
+#endif
+#if defined(GSS_S_DEFECTIVE_TOKEN)
+		{GSS_S_DEFECTIVE_TOKEN, NT_STATUS_ACCESS_DENIED},
+#endif
+#if defined(GSS_S_DEFECTIVE_CREDENTIAL)
+		{GSS_S_DEFECTIVE_CREDENTIAL, NT_STATUS_ACCESS_DENIED},
+#endif
+#if defined(GSS_S_CREDENTIALS_EXPIRED)
+		{GSS_S_CREDENTIALS_EXPIRED, NT_STATUS_PASSWORD_EXPIRED},
+#endif
+#if defined(GSS_S_CONTEXT_EXPIRED)
+		{GSS_S_CONTEXT_EXPIRED, NT_STATUS_PASSWORD_EXPIRED},
+#endif
+#if defined(GSS_S_BAD_QOP)
+		{GSS_S_BAD_QOP, NT_STATUS_ACCESS_DENIED},
+#endif
+#if defined(GSS_S_UNAUTHORIZED)
+		{GSS_S_UNAUTHORIZED, NT_STATUS_ACCESS_DENIED},
+#endif
+#if defined(GSS_S_UNAVAILABLE)
+		{GSS_S_UNAVAILABLE, NT_STATUS_UNSUCCESSFUL},
+#endif
+#if defined(GSS_S_DUPLICATE_ELEMENT)
+		{GSS_S_DUPLICATE_ELEMENT, NT_STATUS_INVALID_PARAMETER},
+#endif
+#if defined(GSS_S_NAME_NOT_MN)
+		{GSS_S_NAME_NOT_MN, NT_STATUS_INVALID_PARAMETER},
+#endif
+		{ 0, NT_STATUS_OK }
+};
+
+/*********************************************************************
+ Map an NT error code from a gssapi error code.
+*********************************************************************/
+
+NTSTATUS map_nt_error_from_gss(uint32 gss_maj, uint32 minor)
+{
+	int i = 0;
+
+	if (gss_maj == GSS_S_COMPLETE) {
+		return NT_STATUS_OK;
+	}
+
+	if (gss_maj == GSS_S_CONTINUE_NEEDED) {
+		return NT_STATUS_MORE_PROCESSING_REQUIRED;
+	}
+
+	if (gss_maj == GSS_S_FAILURE) {
+		return map_nt_error_from_unix((int)minor);
+	}
+	
+	/* Look through list */
+	while(gss_to_ntstatus_errormap[i].gss_err != 0) {
+		if (gss_to_ntstatus_errormap[i].gss_err == gss_maj) {
+			return gss_to_ntstatus_errormap[i].ntstatus;
+		}
+		i++;
+	}
+
+	/* Default return */
+	return NT_STATUS_ACCESS_DENIED;
+}
+#endif
diff --git a/source3/libsmb/smb_seal.c b/source3/libsmb/smb_seal.c
new file mode 100644
index 00000000000..055a27d05af
--- /dev/null
+++ b/source3/libsmb/smb_seal.c
@@ -0,0 +1,496 @@
+/* 
+   Unix SMB/CIFS implementation.
+   SMB Transport encryption (sealing) code.
+   Copyright (C) Jeremy Allison 2007.
+   
+   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"
+
+/******************************************************************************
+ Pull out the encryption context for this packet. 0 means global context.
+******************************************************************************/
+
+NTSTATUS get_enc_ctx_num(const char *buf, uint16 *p_enc_ctx_num)
+{
+	if (smb_len(buf) < 8) {
+		return NT_STATUS_INVALID_BUFFER_SIZE;
+	}
+
+	if (buf[4] == (char)0xFF) {
+		if (buf[5] == 'S' && buf [6] == 'M' && buf[7] == 'B') {
+			/* Not an encrypted buffer. */
+			return NT_STATUS_NOT_FOUND;
+		}
+		if (buf[5] == 'E') {
+			*p_enc_ctx_num = SVAL(buf,6);
+			return NT_STATUS_OK;
+		}
+	}
+	return NT_STATUS_INVALID_NETWORK_RESPONSE;
+}
+
+/******************************************************************************
+ Generic code for client and server.
+ Is encryption turned on ?
+******************************************************************************/
+
+bool common_encryption_on(struct smb_trans_enc_state *es)
+{
+	return ((es != NULL) && es->enc_on);
+}
+
+/******************************************************************************
+ Generic code for client and server.
+ NTLM decrypt an incoming buffer.
+ Abartlett tells me that SSPI puts the signature first before the encrypted
+ output, so cope with the same for compatibility.
+******************************************************************************/
+
+NTSTATUS common_ntlm_decrypt_buffer(NTLMSSP_STATE *ntlmssp_state, char *buf)
+{
+	NTSTATUS status;
+	size_t buf_len = smb_len(buf) + 4; /* Don't forget the 4 length bytes. */
+	size_t data_len;
+	char *inbuf;
+	DATA_BLOB sig;
+
+	if (buf_len < 8 + NTLMSSP_SIG_SIZE) {
+		return NT_STATUS_BUFFER_TOO_SMALL;
+	}
+
+	inbuf = (char *)smb_xmemdup(buf, buf_len);
+
+	/* Adjust for the signature. */
+	data_len = buf_len - 8 - NTLMSSP_SIG_SIZE;
+
+	/* Point at the signature. */
+	sig = data_blob_const(inbuf+8, NTLMSSP_SIG_SIZE);
+
+	status = ntlmssp_unseal_packet(ntlmssp_state,
+		(unsigned char *)inbuf + 8 + NTLMSSP_SIG_SIZE, /* 4 byte len + 0xFF 'E' <enc> <ctx> */
+		data_len,
+		(unsigned char *)inbuf + 8 + NTLMSSP_SIG_SIZE,
+		data_len,
+		&sig);
+
+	if (!NT_STATUS_IS_OK(status)) {
+		SAFE_FREE(inbuf);
+		return status;
+	}
+
+	memcpy(buf + 8, inbuf + 8 + NTLMSSP_SIG_SIZE, data_len);
+
+	/* Reset the length. */
+	_smb_setlen(buf,data_len + 4);
+
+	SAFE_FREE(inbuf);
+	return NT_STATUS_OK;
+}
+
+/******************************************************************************
+ Generic code for client and server.
+ NTLM encrypt an outgoing buffer. Return the encrypted pointer in ppbuf_out.
+ Abartlett tells me that SSPI puts the signature first before the encrypted
+ output, so do the same for compatibility.
+******************************************************************************/
+
+NTSTATUS common_ntlm_encrypt_buffer(NTLMSSP_STATE *ntlmssp_state,
+				uint16 enc_ctx_num,
+				char *buf,
+				char **ppbuf_out)
+{
+	NTSTATUS status;
+	char *buf_out;
+	size_t data_len = smb_len(buf) - 4; /* Ignore the 0xFF SMB bytes. */
+	DATA_BLOB sig;
+
+	*ppbuf_out = NULL;
+
+	if (data_len == 0) {
+		return NT_STATUS_BUFFER_TOO_SMALL;
+	}
+
+	/* 
+	 * We know smb_len can't return a value > 128k, so no int overflow
+	 * check needed.
+	 */
+
+	buf_out = SMB_XMALLOC_ARRAY(char, 8 + NTLMSSP_SIG_SIZE + data_len);
+
+	/* Copy the data from the original buffer. */
+
+	memcpy(buf_out + 8 + NTLMSSP_SIG_SIZE, buf + 8, data_len);
+
+	smb_set_enclen(buf_out, smb_len(buf) + NTLMSSP_SIG_SIZE, enc_ctx_num);
+
+	sig = data_blob(NULL, NTLMSSP_SIG_SIZE);
+
+	status = ntlmssp_seal_packet(ntlmssp_state,
+		(unsigned char *)buf_out + 8 + NTLMSSP_SIG_SIZE, /* 4 byte len + 0xFF 'S' <enc> <ctx> */
+		data_len,
+		(unsigned char *)buf_out + 8 + NTLMSSP_SIG_SIZE,
+		data_len,
+		&sig);
+
+	if (!NT_STATUS_IS_OK(status)) {
+		data_blob_free(&sig);
+		SAFE_FREE(buf_out);
+		return status;
+	}
+
+	/* First 16 data bytes are signature for SSPI compatibility. */
+	memcpy(buf_out + 8, sig.data, NTLMSSP_SIG_SIZE);
+	*ppbuf_out = buf_out;
+	return NT_STATUS_OK;
+}
+
+/******************************************************************************
+ Generic code for client and server.
+ gss-api decrypt an incoming buffer. We insist that the size of the
+ unwrapped buffer must be smaller or identical to the incoming buffer.
+******************************************************************************/
+
+#if defined(HAVE_GSSAPI) && defined(HAVE_KRB5)
+static NTSTATUS common_gss_decrypt_buffer(struct smb_tran_enc_state_gss *gss_state, char *buf)
+{
+	gss_ctx_id_t gss_ctx = gss_state->gss_ctx;
+	OM_uint32 ret = 0;
+	OM_uint32 minor = 0;
+	int flags_got = 0;
+	gss_buffer_desc in_buf, out_buf;
+	size_t buf_len = smb_len(buf) + 4; /* Don't forget the 4 length bytes. */
+
+	if (buf_len < 8) {
+		return NT_STATUS_BUFFER_TOO_SMALL;
+	}
+
+	in_buf.value = buf + 8;
+	in_buf.length = buf_len - 8;
+
+	ret = gss_unwrap(&minor,
+			gss_ctx,
+			&in_buf,
+			&out_buf,
+			&flags_got,		/* did we get sign+seal ? */
+			(gss_qop_t *) NULL);	
+
+	if (ret != GSS_S_COMPLETE) {
+		ADS_STATUS adss = ADS_ERROR_GSS(ret, minor);
+		DEBUG(0,("common_gss_encrypt_buffer: gss_unwrap failed. Error %s\n",
+			ads_errstr(adss) ));
+		return map_nt_error_from_gss(ret, minor);
+	}
+
+	if (out_buf.length > in_buf.length) {
+		DEBUG(0,("common_gss_encrypt_buffer: gss_unwrap size (%u) too large (%u) !\n",
+			(unsigned int)out_buf.length,
+			(unsigned int)in_buf.length ));
+		gss_release_buffer(&minor, &out_buf);
+		return NT_STATUS_INVALID_PARAMETER;
+	}
+
+	memcpy(buf + 8, out_buf.value, out_buf.length);
+	_smb_setlen(buf, out_buf.length + 4);
+
+	gss_release_buffer(&minor, &out_buf);
+	return NT_STATUS_OK;
+}
+
+/******************************************************************************
+ Generic code for client and server.
+ gss-api encrypt an outgoing buffer. Return the alloced encrypted pointer in buf_out.
+******************************************************************************/
+
+static NTSTATUS common_gss_encrypt_buffer(struct smb_tran_enc_state_gss *gss_state,
+					uint16 enc_ctx_num,
+		 			char *buf,
+					char **ppbuf_out)
+{
+	gss_ctx_id_t gss_ctx = gss_state->gss_ctx;
+	OM_uint32 ret = 0;
+	OM_uint32 minor = 0;
+	int flags_got = 0;
+	gss_buffer_desc in_buf, out_buf;
+	size_t buf_len = smb_len(buf) + 4; /* Don't forget the 4 length bytes. */
+
+	*ppbuf_out = NULL;
+
+	if (buf_len < 8) {
+		return NT_STATUS_BUFFER_TOO_SMALL;
+	}
+
+	in_buf.value = buf + 8;
+	in_buf.length = buf_len - 8;
+
+	ret = gss_wrap(&minor,
+			gss_ctx,
+			true,			/* we want sign+seal. */
+			GSS_C_QOP_DEFAULT,
+			&in_buf,
+			&flags_got,		/* did we get sign+seal ? */
+			&out_buf);
+
+	if (ret != GSS_S_COMPLETE) {
+		ADS_STATUS adss = ADS_ERROR_GSS(ret, minor);
+		DEBUG(0,("common_gss_encrypt_buffer: gss_wrap failed. Error %s\n",
+			ads_errstr(adss) ));
+		return map_nt_error_from_gss(ret, minor);
+	}
+
+	if (!flags_got) {
+		/* Sign+seal not supported. */
+		gss_release_buffer(&minor, &out_buf);
+		return NT_STATUS_NOT_SUPPORTED;
+	}
+
+	/* Ya see - this is why I *hate* gss-api. I don't 
+	 * want to have to malloc another buffer of the
+	 * same size + 8 bytes just to get a continuous
+	 * header + buffer, but gss won't let me pass in
+	 * a pre-allocated buffer. Bastards (and you know
+	 * who you are....). I might fix this by
+	 * going to "encrypt_and_send" passing in a file
+	 * descriptor and doing scatter-gather write with
+	 * TCP cork on Linux. But I shouldn't have to
+	 * bother :-*(. JRA.
+	 */
+
+	*ppbuf_out = (char *)SMB_MALLOC(out_buf.length + 8); /* We know this can't wrap. */
+	if (!*ppbuf_out) {
+		gss_release_buffer(&minor, &out_buf);
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	memcpy(*ppbuf_out+8, out_buf.value, out_buf.length);
+	smb_set_enclen(*ppbuf_out, out_buf.length + 4, enc_ctx_num);
+
+	gss_release_buffer(&minor, &out_buf);
+	return NT_STATUS_OK;
+}
+#endif
+
+/******************************************************************************
+ Generic code for client and server.
+ Encrypt an outgoing buffer. Return the alloced encrypted pointer in buf_out.
+******************************************************************************/
+
+NTSTATUS common_encrypt_buffer(struct smb_trans_enc_state *es, char *buffer, char **buf_out)
+{
+	if (!common_encryption_on(es)) {
+		/* Not encrypting. */
+		*buf_out = buffer;
+		return NT_STATUS_OK;
+	}
+
+	switch (es->smb_enc_type) {
+		case SMB_TRANS_ENC_NTLM:
+			return common_ntlm_encrypt_buffer(es->s.ntlmssp_state, es->enc_ctx_num, buffer, buf_out);
+#if defined(HAVE_GSSAPI) && defined(HAVE_KRB5)
+		case SMB_TRANS_ENC_GSS:
+			return common_gss_encrypt_buffer(es->s.gss_state, es->enc_ctx_num, buffer, buf_out);
+#endif
+		default:
+			return NT_STATUS_NOT_SUPPORTED;
+	}
+}
+
+/******************************************************************************
+ Generic code for client and server.
+ Decrypt an incoming SMB buffer. Replaces the data within it.
+ New data must be less than or equal to the current length.
+******************************************************************************/
+
+NTSTATUS common_decrypt_buffer(struct smb_trans_enc_state *es, char *buf)
+{
+	if (!common_encryption_on(es)) {
+		/* Not decrypting. */
+		return NT_STATUS_OK;
+	}
+
+	switch (es->smb_enc_type) {
+		case SMB_TRANS_ENC_NTLM:
+			return common_ntlm_decrypt_buffer(es->s.ntlmssp_state, buf);
+#if defined(HAVE_GSSAPI) && defined(HAVE_KRB5)
+		case SMB_TRANS_ENC_GSS:
+			return common_gss_decrypt_buffer(es->s.gss_state, buf);
+#endif
+		default:
+			return NT_STATUS_NOT_SUPPORTED;
+	}
+}
+
+#if defined(HAVE_GSSAPI) && defined(HAVE_KRB5)
+/******************************************************************************
+ Shutdown a gss encryption state.
+******************************************************************************/
+
+static void common_free_gss_state(struct smb_tran_enc_state_gss **pp_gss_state)
+{
+	OM_uint32 minor = 0;
+	struct smb_tran_enc_state_gss *gss_state = *pp_gss_state;
+
+	if (gss_state->creds != GSS_C_NO_CREDENTIAL) {
+		gss_release_cred(&minor, &gss_state->creds);
+	}
+	if (gss_state->gss_ctx != GSS_C_NO_CONTEXT) {
+		gss_delete_sec_context(&minor, &gss_state->gss_ctx, NULL);
+	}
+	SAFE_FREE(*pp_gss_state);
+}
+#endif
+
+/******************************************************************************
+ Shutdown an encryption state.
+******************************************************************************/
+
+void common_free_encryption_state(struct smb_trans_enc_state **pp_es)
+{
+	struct smb_trans_enc_state *es = *pp_es;
+
+	if (es == NULL) {
+		return;
+	}
+
+	if (es->smb_enc_type == SMB_TRANS_ENC_NTLM) {
+		if (es->s.ntlmssp_state) {
+			ntlmssp_end(&es->s.ntlmssp_state);
+		}
+	}
+#if defined(HAVE_GSSAPI) && defined(HAVE_KRB5)
+	if (es->smb_enc_type == SMB_TRANS_ENC_GSS) {
+		/* Free the gss context handle. */
+		if (es->s.gss_state) {
+			common_free_gss_state(&es->s.gss_state);
+		}
+	}
+#endif
+	SAFE_FREE(es);
+	*pp_es = NULL;
+}
+
+/******************************************************************************
+ Free an encryption-allocated buffer.
+******************************************************************************/
+
+void common_free_enc_buffer(struct smb_trans_enc_state *es, char *buf)
+{
+	if (!common_encryption_on(es)) {
+		return;
+	}
+
+	if (es->smb_enc_type == SMB_TRANS_ENC_NTLM) {
+		SAFE_FREE(buf);
+		return;
+	}
+
+#if defined(HAVE_GSSAPI) && defined(HAVE_KRB5)
+	if (es->smb_enc_type == SMB_TRANS_ENC_GSS) {
+		OM_uint32 min;
+		gss_buffer_desc rel_buf;
+		rel_buf.value = buf;
+		rel_buf.length = smb_len(buf) + 4;
+		gss_release_buffer(&min, &rel_buf);
+	}
+#endif
+}
+
+/******************************************************************************
+ Client side encryption.
+******************************************************************************/
+
+/******************************************************************************
+ Is client encryption on ?
+******************************************************************************/
+
+bool cli_encryption_on(struct cli_state *cli)
+{
+	/* If we supported multiple encrytion contexts
+	 * here we'd look up based on tid.
+	 */
+	return common_encryption_on(cli->trans_enc_state);
+}
+
+/******************************************************************************
+ Shutdown a client encryption state.
+******************************************************************************/
+
+void cli_free_encryption_context(struct cli_state *cli)
+{
+	common_free_encryption_state(&cli->trans_enc_state);
+}
+
+/******************************************************************************
+ Free an encryption-allocated buffer.
+******************************************************************************/
+
+void cli_free_enc_buffer(struct cli_state *cli, char *buf)
+{
+	/* We know this is an smb buffer, and we
+	 * didn't malloc, only copy, for a keepalive,
+	 * so ignore session keepalives. */
+
+	if(CVAL(buf,0) == SMBkeepalive) {
+		return;
+	}
+
+	/* If we supported multiple encrytion contexts
+	 * here we'd look up based on tid.
+	 */
+	common_free_enc_buffer(cli->trans_enc_state, buf);
+}
+
+/******************************************************************************
+ Decrypt an incoming buffer.
+******************************************************************************/
+
+NTSTATUS cli_decrypt_message(struct cli_state *cli)
+{
+	NTSTATUS status;
+	uint16 enc_ctx_num;
+
+	/* Ignore session keepalives. */
+	if(CVAL(cli->inbuf,0) == SMBkeepalive) {
+		return NT_STATUS_OK;
+	}
+
+	status = get_enc_ctx_num(cli->inbuf, &enc_ctx_num);
+	if (!NT_STATUS_IS_OK(status)) {
+		return status;
+	}
+
+	if (enc_ctx_num != cli->trans_enc_state->enc_ctx_num) {
+		return NT_STATUS_INVALID_HANDLE;
+	}
+
+	return common_decrypt_buffer(cli->trans_enc_state, cli->inbuf);
+}
+
+/******************************************************************************
+ Encrypt an outgoing buffer. Return the encrypted pointer in buf_out.
+******************************************************************************/
+
+NTSTATUS cli_encrypt_message(struct cli_state *cli, char **buf_out)
+{
+	/* Ignore session keepalives. */
+	if(CVAL(cli->outbuf,0) == SMBkeepalive) {
+		return NT_STATUS_OK;
+	}
+
+	/* If we supported multiple encrytion contexts
+	 * here we'd look up based on tid.
+	 */
+	return common_encrypt_buffer(cli->trans_enc_state, cli->outbuf, buf_out);
+}