diff --git a/fs/cifs/cifsencrypt.c b/fs/cifs/cifsencrypt.c
new file mode 100644
index 0000000..78829e7
--- /dev/null
+++ b/fs/cifs/cifsencrypt.c
@@ -0,0 +1,209 @@
+/*
+ *   fs/cifs/cifsencrypt.c
+ *
+ *   Copyright (C) International Business Machines  Corp., 2003
+ *   Author(s): Steve French (sfrench@us.ibm.com)
+ *
+ *   This library is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU Lesser General Public License as published
+ *   by the Free Software Foundation; either version 2.1 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This library 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 Lesser General Public License for more details.
+ *
+ *   You should have received a copy of the GNU Lesser General Public License
+ *   along with this library; if not, write to the Free Software
+ *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <linux/fs.h>
+#include "cifspdu.h"
+#include "cifsglob.h" 
+#include "cifs_debug.h"
+#include "md5.h"
+#include "cifs_unicode.h"
+#include "cifsproto.h"
+
+/* Calculate and return the CIFS signature based on the mac key and the smb pdu */
+/* the 16 byte signature must be allocated by the caller  */
+/* Note we only use the 1st eight bytes */
+/* Note that the smb header signature field on input contains the  
+	sequence number before this function is called */
+
+extern void mdfour(unsigned char *out, unsigned char *in, int n);
+extern void E_md4hash(const unsigned char *passwd, unsigned char *p16);
+	
+static int cifs_calculate_signature(const struct smb_hdr * cifs_pdu, const char * key, char * signature)
+{
+	struct	MD5Context context;
+
+	if((cifs_pdu == NULL) || (signature == NULL))
+		return -EINVAL;
+
+	MD5Init(&context);
+	MD5Update(&context,key,CIFS_SESSION_KEY_SIZE+16);
+	MD5Update(&context,cifs_pdu->Protocol,cifs_pdu->smb_buf_length);
+	MD5Final(signature,&context);
+	return 0;
+}
+
+int cifs_sign_smb(struct smb_hdr * cifs_pdu, struct cifsSesInfo * ses,
+	__u32 * pexpected_response_sequence_number)
+{
+	int rc = 0;
+	char smb_signature[20];
+
+	/* BB remember to initialize sequence number elsewhere and initialize mac_signing key elsewhere BB */
+	/* BB remember to add code to save expected sequence number in midQ entry BB */
+
+	if((cifs_pdu == NULL) || (ses == NULL))
+		return -EINVAL;
+
+	if((cifs_pdu->Flags2 & SMBFLG2_SECURITY_SIGNATURE) == 0) 
+		return rc;
+
+	spin_lock(&GlobalMid_Lock);
+	cifs_pdu->Signature.Sequence.SequenceNumber = cpu_to_le32(ses->sequence_number);
+	cifs_pdu->Signature.Sequence.Reserved = 0;
+	
+	*pexpected_response_sequence_number = ses->sequence_number++;
+	ses->sequence_number++;
+	spin_unlock(&GlobalMid_Lock);
+
+	rc = cifs_calculate_signature(cifs_pdu, ses->mac_signing_key,smb_signature);
+	if(rc)
+		memset(cifs_pdu->Signature.SecuritySignature, 0, 8);
+	else
+		memcpy(cifs_pdu->Signature.SecuritySignature, smb_signature, 8);
+
+	return rc;
+}
+
+int cifs_verify_signature(struct smb_hdr * cifs_pdu, const char * mac_key,
+	__u32 expected_sequence_number)
+{
+	unsigned int rc;
+	char server_response_sig[8];
+	char what_we_think_sig_should_be[20];
+
+	if((cifs_pdu == NULL) || (mac_key == NULL))
+		return -EINVAL;
+
+	if (cifs_pdu->Command == SMB_COM_NEGOTIATE)
+		return 0;
+
+	if (cifs_pdu->Command == SMB_COM_LOCKING_ANDX) {
+		struct smb_com_lock_req * pSMB = (struct smb_com_lock_req *)cifs_pdu;
+	    if(pSMB->LockType & LOCKING_ANDX_OPLOCK_RELEASE)
+			return 0;
+	}
+
+	/* BB what if signatures are supposed to be on for session but server does not
+		send one? BB */
+	
+	/* Do not need to verify session setups with signature "BSRSPYL "  */
+	if(memcmp(cifs_pdu->Signature.SecuritySignature,"BSRSPYL ",8)==0)
+		cFYI(1,("dummy signature received for smb command 0x%x",cifs_pdu->Command));
+
+	/* save off the origiginal signature so we can modify the smb and check
+		its signature against what the server sent */
+	memcpy(server_response_sig,cifs_pdu->Signature.SecuritySignature,8);
+
+	cifs_pdu->Signature.Sequence.SequenceNumber = cpu_to_le32(expected_sequence_number);
+	cifs_pdu->Signature.Sequence.Reserved = 0;
+
+	rc = cifs_calculate_signature(cifs_pdu, mac_key,
+		what_we_think_sig_should_be);
+
+	if(rc)
+		return rc;
+
+	
+/*	cifs_dump_mem("what we think it should be: ",what_we_think_sig_should_be,16); */
+
+	if(memcmp(server_response_sig, what_we_think_sig_should_be, 8))
+		return -EACCES;
+	else
+		return 0;
+
+}
+
+/* We fill in key by putting in 40 byte array which was allocated by caller */
+int cifs_calculate_mac_key(char * key, const char * rn, const char * password)
+{
+	char temp_key[16];
+	if ((key == NULL) || (rn == NULL))
+		return -EINVAL;
+
+	E_md4hash(password, temp_key);
+	mdfour(key,temp_key,16);
+	memcpy(key+16,rn, CIFS_SESSION_KEY_SIZE);
+	return 0;
+}
+
+int CalcNTLMv2_partial_mac_key(struct cifsSesInfo * ses, struct nls_table * nls_info)
+{
+	char temp_hash[16];
+	struct HMACMD5Context ctx;
+	char * ucase_buf;
+	wchar_t * unicode_buf;
+	unsigned int i,user_name_len,dom_name_len;
+
+	if(ses == NULL)
+		return -EINVAL;
+
+	E_md4hash(ses->password, temp_hash);
+
+	hmac_md5_init_limK_to_64(temp_hash, 16, &ctx);
+	user_name_len = strlen(ses->userName);
+	if(user_name_len > MAX_USERNAME_SIZE)
+		return -EINVAL;
+	dom_name_len = strlen(ses->domainName);
+	if(dom_name_len > MAX_USERNAME_SIZE)
+		return -EINVAL;
+  
+	ucase_buf = kmalloc((MAX_USERNAME_SIZE+1), GFP_KERNEL);
+	if(ucase_buf == NULL)
+		return -ENOMEM;
+	unicode_buf = kmalloc((MAX_USERNAME_SIZE+1)*4, GFP_KERNEL);
+	if(unicode_buf == NULL) {
+		kfree(ucase_buf);
+		return -ENOMEM;
+	}
+   
+	for(i=0;i<user_name_len;i++)
+		ucase_buf[i] = nls_info->charset2upper[(int)ses->userName[i]];
+	ucase_buf[i] = 0;
+	user_name_len = cifs_strtoUCS(unicode_buf, ucase_buf, MAX_USERNAME_SIZE*2, nls_info);
+	unicode_buf[user_name_len] = 0;
+	user_name_len++;
+
+	for(i=0;i<dom_name_len;i++)
+		ucase_buf[i] = nls_info->charset2upper[(int)ses->domainName[i]];
+	ucase_buf[i] = 0;
+	dom_name_len = cifs_strtoUCS(unicode_buf+user_name_len, ucase_buf, MAX_USERNAME_SIZE*2, nls_info);
+
+	unicode_buf[user_name_len + dom_name_len] = 0;
+	hmac_md5_update((const unsigned char *) unicode_buf,
+		(user_name_len+dom_name_len)*2,&ctx);
+
+	hmac_md5_final(ses->mac_signing_key,&ctx);
+	kfree(ucase_buf);
+	kfree(unicode_buf);
+	return 0;
+}
+void CalcNTLMv2_response(const struct cifsSesInfo * ses,char * v2_session_response)
+{
+	struct HMACMD5Context context;
+	memcpy(v2_session_response + 8, ses->server->cryptKey,8);
+	/* gen_blob(v2_session_response + 16); */
+	hmac_md5_init_limK_to_64(ses->mac_signing_key, 16, &context);
+
+	hmac_md5_update(ses->server->cryptKey,8,&context);
+/*	hmac_md5_update(v2_session_response+16)client thing,8,&context); */ /* BB fix */
+
+	hmac_md5_final(v2_session_response,&context);
+}