[mirror_ubuntu-artful-kernel.git] / fs / cifs / cifsencrypt.c

/*
 *   fs/cifs/cifsencrypt.c
 *
 *   Copyright (C) International Business Machines  Corp., 2005,2006
 *   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 <linux/slab.h>
#include "cifspdu.h"
#include "cifsglob.h"
#include "cifs_debug.h"
#include "md5.h"
#include "cifs_unicode.h"
#include "cifsproto.h"
#include "ntlmssp.h"
#include <linux/ctype.h>
#include <linux/random.h>

/* Calculate and return the CIFS signature based on the mac key and 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);
extern void SMBencrypt(unsigned char *passwd, const unsigned char *c8,
		       unsigned char *p24);

static int cifs_calculate_signature(const struct smb_hdr *cifs_pdu,
			struct TCP_Server_Info *server, char *signature)
{
	int rc = 0;
	struct {
		struct shash_desc shash;
		char ctx[crypto_shash_descsize(server->ntlmssp.md5)];
	} sdesc;

	if (cifs_pdu == NULL || server == NULL || signature == NULL)
		return -EINVAL;

	sdesc.shash.tfm = server->ntlmssp.md5;
	sdesc.shash.flags = 0x0;

	rc = crypto_shash_init(&sdesc.shash);
	if (rc) {
		cERROR(1, "could not initialize master crypto API hmacmd5\n");
		return rc;
	}

	if (server->secType == RawNTLMSSP)
		crypto_shash_update(&sdesc.shash,
			server->session_key.data.ntlmv2.key,
			CIFS_NTLMV2_SESSKEY_SIZE);
	else
		crypto_shash_update(&sdesc.shash,
			(char *)&server->session_key.data,
			server->session_key.len);

	crypto_shash_update(&sdesc.shash,
			cifs_pdu->Protocol, cifs_pdu->smb_buf_length);

	rc = crypto_shash_final(&sdesc.shash, signature);

	return 0;
}


int cifs_sign_smb(struct smb_hdr *cifs_pdu, struct TCP_Server_Info *server,
		  __u32 *pexpected_response_sequence_number)
{
	int rc = 0;
	char smb_signature[20];

	if ((cifs_pdu == NULL) || (server == 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(server->sequence_number);
	cifs_pdu->Signature.Sequence.Reserved = 0;

	*pexpected_response_sequence_number = server->sequence_number++;
	server->sequence_number++;
	spin_unlock(&GlobalMid_Lock);

	rc = cifs_calculate_signature(cifs_pdu, server, smb_signature);
	if (rc)
		memset(cifs_pdu->Signature.SecuritySignature, 0, 8);
	else
		memcpy(cifs_pdu->Signature.SecuritySignature, smb_signature, 8);

	return rc;
}

static int cifs_calc_signature2(const struct kvec *iov, int n_vec,
			struct TCP_Server_Info *server, char *signature)
{
	int i;
	int rc = 0;
	struct {
		struct shash_desc shash;
		char ctx[crypto_shash_descsize(server->ntlmssp.md5)];
	} sdesc;

	if (iov == NULL || server == NULL || signature == NULL)
		return -EINVAL;

	sdesc.shash.tfm = server->ntlmssp.md5;
	sdesc.shash.flags = 0x0;

	rc = crypto_shash_init(&sdesc.shash);
	if (rc) {
		cERROR(1, "could not initialize master crypto API hmacmd5\n");
		return rc;
	}

	if (server->secType == RawNTLMSSP)
		crypto_shash_update(&sdesc.shash,
			server->session_key.data.ntlmv2.key,
			CIFS_NTLMV2_SESSKEY_SIZE);
	else
		crypto_shash_update(&sdesc.shash,
			(char *)&server->session_key.data,
			server->session_key.len);

	for (i = 0; i < n_vec; i++) {
		if (iov[i].iov_len == 0)
			continue;
		if (iov[i].iov_base == NULL) {
			cERROR(1, "null iovec entry");
			return -EIO;
		}
		/* The first entry includes a length field (which does not get
		   signed that occupies the first 4 bytes before the header */
		if (i == 0) {
			if (iov[0].iov_len <= 8) /* cmd field at offset 9 */
				break; /* nothing to sign or corrupt header */
			crypto_shash_update(&sdesc.shash,
				iov[i].iov_base + 4, iov[i].iov_len - 4);
		} else
			crypto_shash_update(&sdesc.shash,
				iov[i].iov_base, iov[i].iov_len);
	}

	rc = crypto_shash_final(&sdesc.shash, signature);

	return 0;
}

int cifs_sign_smb2(struct kvec *iov, int n_vec, struct TCP_Server_Info *server,
		   __u32 *pexpected_response_sequence_number)
{
	int rc = 0;
	char smb_signature[20];
	struct smb_hdr *cifs_pdu = iov[0].iov_base;

	if ((cifs_pdu == NULL) || (server == 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(server->sequence_number);
	cifs_pdu->Signature.Sequence.Reserved = 0;

	*pexpected_response_sequence_number = server->sequence_number++;
	server->sequence_number++;
	spin_unlock(&GlobalMid_Lock);

	rc = cifs_calc_signature2(iov, n_vec, server, 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,
			  struct TCP_Server_Info *server,
			  __u32 expected_sequence_number)
{
	int rc;
	char server_response_sig[8];
	char what_we_think_sig_should_be[20];

	if (cifs_pdu == NULL || server == 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, server,
		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_session_key(struct session_key *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->data.ntlm, temp_key, 16);
	memcpy(key->data.ntlm+16, rn, CIFS_SESS_KEY_SIZE);
	key->len = 40;
	return 0;
}

#ifdef CONFIG_CIFS_WEAK_PW_HASH
void calc_lanman_hash(const char *password, const char *cryptkey, bool encrypt,
			char *lnm_session_key)
{
	int i;
	char password_with_pad[CIFS_ENCPWD_SIZE];

	memset(password_with_pad, 0, CIFS_ENCPWD_SIZE);
	if (password)
		strncpy(password_with_pad, password, CIFS_ENCPWD_SIZE);

	if (!encrypt && global_secflags & CIFSSEC_MAY_PLNTXT) {
		memset(lnm_session_key, 0, CIFS_SESS_KEY_SIZE);
		memcpy(lnm_session_key, password_with_pad,
			CIFS_ENCPWD_SIZE);
		return;
	}

	/* calculate old style session key */
	/* calling toupper is less broken than repeatedly
	calling nls_toupper would be since that will never
	work for UTF8, but neither handles multibyte code pages
	but the only alternative would be converting to UCS-16 (Unicode)
	(using a routine something like UniStrupr) then
	uppercasing and then converting back from Unicode - which
	would only worth doing it if we knew it were utf8. Basically
	utf8 and other multibyte codepages each need their own strupper
	function since a byte at a time will ont work. */

	for (i = 0; i < CIFS_ENCPWD_SIZE; i++)
		password_with_pad[i] = toupper(password_with_pad[i]);

	SMBencrypt(password_with_pad, cryptkey, lnm_session_key);

	/* clear password before we return/free memory */
	memset(password_with_pad, 0, CIFS_ENCPWD_SIZE);
}
#endif /* CIFS_WEAK_PW_HASH */

static int calc_ntlmv2_hash(struct cifsSesInfo *ses,
			    const struct nls_table *nls_cp)
{
	int rc = 0;
	int len;
	char nt_hash[CIFS_NTHASH_SIZE];
	wchar_t *user;
	wchar_t *domain;
	wchar_t *server;
	struct {
		struct shash_desc shash;
		char ctx[crypto_shash_descsize(ses->server->ntlmssp.hmacmd5)];
	} sdesc;

	/* calculate md4 hash of password */
	E_md4hash(ses->password, nt_hash);

	sdesc.shash.tfm = ses->server->ntlmssp.hmacmd5;
	sdesc.shash.flags = 0x0;

	crypto_shash_setkey(ses->server->ntlmssp.hmacmd5, nt_hash,
				CIFS_NTHASH_SIZE);

	rc = crypto_shash_init(&sdesc.shash);
	if (rc) {
		cERROR(1, "could not initialize master crypto API hmacmd5\n");
		return rc;
	}

	/* convert ses->userName to unicode and uppercase */
	len = strlen(ses->userName);
	user = kmalloc(2 + (len * 2), GFP_KERNEL);
	if (user == NULL)
		goto calc_exit_2;
	len = cifs_strtoUCS((__le16 *)user, ses->userName, len, nls_cp);
	UniStrupr(user);

	crypto_shash_update(&sdesc.shash, (char *)user, 2 * len);

	/* convert ses->domainName to unicode and uppercase */
	if (ses->domainName) {
		len = strlen(ses->domainName);

		domain = kmalloc(2 + (len * 2), GFP_KERNEL);
		if (domain == NULL)
			goto calc_exit_1;
		len = cifs_strtoUCS((__le16 *)domain, ses->domainName, len,
					nls_cp);
		/* the following line was removed since it didn't work well
		   with lower cased domain name that passed as an option.
		   Maybe converting the domain name earlier makes sense */
		/* UniStrupr(domain); */

		crypto_shash_update(&sdesc.shash, (char *)domain, 2 * len);

		kfree(domain);
	} else if (ses->serverName) {
		len = strlen(ses->serverName);

		server = kmalloc(2 + (len * 2), GFP_KERNEL);
		if (server == NULL)
			goto calc_exit_1;
		len = cifs_strtoUCS((__le16 *)server, ses->serverName, len,
					nls_cp);
		/* the following line was removed since it didn't work well
		   with lower cased domain name that passed as an option.
		   Maybe converting the domain name earlier makes sense */
		/* UniStrupr(domain); */

		crypto_shash_update(&sdesc.shash, (char *)server, 2 * len);

		kfree(server);
	}
calc_exit_1:
	kfree(user);
calc_exit_2:
	/* BB FIXME what about bytes 24 through 40 of the signing key?
	   compare with the NTLM example */
	rc = crypto_shash_final(&sdesc.shash, ses->server->ntlmv2_hash);

	return rc;
}

static int
find_domain_name(struct cifsSesInfo *ses)
{
	int rc = 0;
	unsigned int attrsize;
	unsigned int type;
	unsigned char *blobptr;
	struct ntlmssp2_name *attrptr;

	if (ses->server->tiblob) {
		blobptr = ses->server->tiblob;
		attrptr = (struct ntlmssp2_name *) blobptr;

		while ((type = attrptr->type) != 0) {
			blobptr += 2; /* advance attr type */
			attrsize = attrptr->length;
			blobptr += 2; /* advance attr size */
			if (type == NTLMSSP_AV_NB_DOMAIN_NAME) {
				if (!ses->domainName) {
					ses->domainName =
						kmalloc(attrptr->length + 1,
								GFP_KERNEL);
					if (!ses->domainName)
							return -ENOMEM;
					cifs_from_ucs2(ses->domainName,
						(__le16 *)blobptr,
						attrptr->length,
						attrptr->length,
						load_nls_default(), false);
				}
			}
			blobptr += attrsize; /* advance attr  value */
			attrptr = (struct ntlmssp2_name *) blobptr;
		}
	} else {
		ses->server->tilen = 2 * sizeof(struct ntlmssp2_name);
		ses->server->tiblob = kmalloc(ses->server->tilen, GFP_KERNEL);
		if (!ses->server->tiblob) {
			ses->server->tilen = 0;
			cERROR(1, "Challenge target info allocation failure");
			return -ENOMEM;
		}
		memset(ses->server->tiblob, 0x0, ses->server->tilen);
		attrptr = (struct ntlmssp2_name *) ses->server->tiblob;
		attrptr->type = cpu_to_le16(NTLMSSP_DOMAIN_TYPE);
	}

	return rc;
}

static int
CalcNTLMv2_response(const struct TCP_Server_Info *server,
			 char *v2_session_response)
{
	int rc;
	struct {
		struct shash_desc shash;
		char ctx[crypto_shash_descsize(server->ntlmssp.hmacmd5)];
	} sdesc;

	sdesc.shash.tfm = server->ntlmssp.hmacmd5;
	sdesc.shash.flags = 0x0;

	crypto_shash_setkey(server->ntlmssp.hmacmd5, server->ntlmv2_hash,
		CIFS_HMAC_MD5_HASH_SIZE);

	rc = crypto_shash_init(&sdesc.shash);
	if (rc) {
		cERROR(1, "could not initialize master crypto API hmacmd5\n");
		return rc;
	}

	memcpy(v2_session_response + CIFS_SERVER_CHALLENGE_SIZE,
		server->cryptKey, CIFS_SERVER_CHALLENGE_SIZE);
	crypto_shash_update(&sdesc.shash,
		v2_session_response + CIFS_SERVER_CHALLENGE_SIZE,
		sizeof(struct ntlmv2_resp) - CIFS_SERVER_CHALLENGE_SIZE);

	if (server->tilen)
		crypto_shash_update(&sdesc.shash,
					server->tiblob, server->tilen);

	rc = crypto_shash_final(&sdesc.shash, v2_session_response);

	return rc;
}

int
setup_ntlmv2_rsp(struct cifsSesInfo *ses, char *resp_buf,
		      const struct nls_table *nls_cp)
{
	int rc = 0;
	struct ntlmv2_resp *buf = (struct ntlmv2_resp *)resp_buf;
	struct {
		struct shash_desc shash;
		char ctx[crypto_shash_descsize(ses->server->ntlmssp.hmacmd5)];
	} sdesc;

	buf->blob_signature = cpu_to_le32(0x00000101);
	buf->reserved = 0;
	buf->time = cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME));
	get_random_bytes(&buf->client_chal, sizeof(buf->client_chal));
	buf->reserved2 = 0;

	if (!ses->domainName) {
		rc = find_domain_name(ses);
		if (rc) {
			cERROR(1, "could not get domain/server name rc %d", rc);
			return rc;
		}
	}

	/* calculate buf->ntlmv2_hash */
	rc = calc_ntlmv2_hash(ses, nls_cp);
	if (rc) {
		cERROR(1, "could not get v2 hash rc %d", rc);
		return rc;
	}
	rc = CalcNTLMv2_response(ses->server, resp_buf);
	if (rc) {
		cERROR(1, "could not get v2 hash rc %d", rc);
		return rc;
	}

	crypto_shash_setkey(ses->server->ntlmssp.hmacmd5,
			ses->server->ntlmv2_hash, CIFS_HMAC_MD5_HASH_SIZE);

	sdesc.shash.tfm = ses->server->ntlmssp.hmacmd5;
	sdesc.shash.flags = 0x0;

	rc = crypto_shash_init(&sdesc.shash);
	if (rc) {
		cERROR(1, "could not initialize master crypto API hmacmd5\n");
		return rc;
	}

	crypto_shash_update(&sdesc.shash, resp_buf, CIFS_HMAC_MD5_HASH_SIZE);

	rc = crypto_shash_final(&sdesc.shash,
		ses->server->session_key.data.ntlmv2.key);

	memcpy(&ses->server->session_key.data.ntlmv2.resp, resp_buf,
			sizeof(struct ntlmv2_resp));
	ses->server->session_key.len = 16 + sizeof(struct ntlmv2_resp);

	return rc;
}

int
calc_seckey(struct TCP_Server_Info *server)
{
	int rc;
	unsigned char sec_key[CIFS_NTLMV2_SESSKEY_SIZE];
	struct crypto_blkcipher *tfm_arc4;
	struct scatterlist sgin, sgout;
	struct blkcipher_desc desc;

	get_random_bytes(sec_key, CIFS_NTLMV2_SESSKEY_SIZE);

	tfm_arc4 = crypto_alloc_blkcipher("ecb(arc4)",
						0, CRYPTO_ALG_ASYNC);
	if (!tfm_arc4 || IS_ERR(tfm_arc4)) {
		cERROR(1, "could not allocate " "master crypto API arc4\n");
		return 1;
	}

	crypto_blkcipher_setkey(tfm_arc4,
		server->session_key.data.ntlmv2.key, CIFS_CPHTXT_SIZE);
	sg_init_one(&sgin, sec_key, CIFS_CPHTXT_SIZE);
	sg_init_one(&sgout, server->ntlmssp.ciphertext, CIFS_CPHTXT_SIZE);
	rc = crypto_blkcipher_encrypt(&desc, &sgout, &sgin, CIFS_CPHTXT_SIZE);

	if (!rc)
		memcpy(server->session_key.data.ntlmv2.key,
				sec_key, CIFS_NTLMV2_SESSKEY_SIZE);

	crypto_free_blkcipher(tfm_arc4);

	return 0;
}

void
cifs_crypto_shash_release(struct TCP_Server_Info *server)
{
	if (server->ntlmssp.md5)
		crypto_free_shash(server->ntlmssp.md5);

	if (server->ntlmssp.hmacmd5)
		crypto_free_shash(server->ntlmssp.hmacmd5);
}

int
cifs_crypto_shash_allocate(struct TCP_Server_Info *server)
{
	server->ntlmssp.hmacmd5 = crypto_alloc_shash("hmac(md5)", 0, 0);
	if (!server->ntlmssp.hmacmd5 ||
			IS_ERR(server->ntlmssp.hmacmd5)) {
		cERROR(1, "could not allocate master crypto API hmacmd5\n");
		return 1;
	}

	server->ntlmssp.md5 = crypto_alloc_shash("md5", 0, 0);
	if (!server->ntlmssp.md5 || IS_ERR(server->ntlmssp.md5)) {
		crypto_free_shash(server->ntlmssp.hmacmd5);
		cERROR(1, "could not allocate master crypto API md5\n");
		return 1;
	}

	return 0;
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* fs/cifs/cifsencrypt.c
	3	*
12b3b8ff	4	* Copyright (C) International Business Machines Corp., 2005,2006
1da177e4 LT	5	* Author(s): Steve French (sfrench@us.ibm.com)
	6	*
	7	* This library is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU Lesser General Public License as published
	9	* by the Free Software Foundation; either version 2.1 of the License, or
	10	* (at your option) any later version.
	11	*
	12	* This library is distributed in the hope that it will be useful,
	13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
	15	* the GNU Lesser General Public License for more details.
	16	*
	17	* You should have received a copy of the GNU Lesser General Public License
	18	* along with this library; if not, write to the Free Software
	19	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	20	*/
	21
	22	#include <linux/fs.h>
5a0e3ad6	23	#include <linux/slab.h>
1da177e4	24	#include "cifspdu.h"
ffdd6e4d	25	#include "cifsglob.h"
1da177e4 LT	26	#include "cifs_debug.h"
	27	#include "md5.h"
	28	#include "cifs_unicode.h"
	29	#include "cifsproto.h"
9fbc5908	30	#include "ntlmssp.h"
7c7b25bc	31	#include <linux/ctype.h>
6d027cfd	32	#include <linux/random.h>
1da177e4	33
ffdd6e4d	34	/* Calculate and return the CIFS signature based on the mac key and SMB PDU */
1da177e4 LT	35	/* the 16 byte signature must be allocated by the caller */
1da177e4 LT	36	/* Note we only use the 1st eight bytes */
ffdd6e4d	37	/* Note that the smb header signature field on input contains the
1da177e4 LT	38	sequence number before this function is called */
	39
	40	extern void mdfour(unsigned char out, unsigned char in, int n);
	41	extern void E_md4hash(const unsigned char passwd, unsigned char p16);
4e53a3fb	42	extern void SMBencrypt(unsigned char passwd, const unsigned char c8,
ffdd6e4d	43	unsigned char *p24);
50c2f753	44
ffdd6e4d	45	static int cifs_calculate_signature(const struct smb_hdr *cifs_pdu,
9fbc5908	46	struct TCP_Server_Info server, char signature)
1da177e4	47	{
56234e27 SF	48	int rc = 0;
	49	struct {
	50	struct shash_desc shash;
	51	char ctx[crypto_shash_descsize(server->ntlmssp.md5)];
	52	} sdesc;
1da177e4	53
9fbc5908	54	if (cifs_pdu == NULL \|\| server == NULL \|\| signature == NULL)
1da177e4 LT	55	return -EINVAL;
1da177e4 LT	56
56234e27 SF	57	sdesc.shash.tfm = server->ntlmssp.md5;
56234e27 SF	58	sdesc.shash.flags = 0x0;
9fbc5908	59
56234e27	60	rc = crypto_shash_init(&sdesc.shash);
9fbc5908	61	if (rc) {
56234e27	62	cERROR(1, "could not initialize master crypto API hmacmd5\n");
9fbc5908 SF	63	return rc;
	64	}
	65
	66	if (server->secType == RawNTLMSSP)
56234e27	67	crypto_shash_update(&sdesc.shash,
9fbc5908 SF	68	server->session_key.data.ntlmv2.key,
	69	CIFS_NTLMV2_SESSKEY_SIZE);
	70	else
56234e27	71	crypto_shash_update(&sdesc.shash,
9fbc5908 SF	72	(char *)&server->session_key.data,
	73	server->session_key.len);
	74
56234e27	75	crypto_shash_update(&sdesc.shash,
9fbc5908 SF	76	cifs_pdu->Protocol, cifs_pdu->smb_buf_length);
9fbc5908 SF	77
56234e27	78	rc = crypto_shash_final(&sdesc.shash, signature);
b609f06a	79
56234e27	80	return 0;
1da177e4 LT	81	}
1da177e4 LT	82
9fbc5908	83
ffdd6e4d SF	84	int cifs_sign_smb(struct smb_hdr cifs_pdu, struct TCP_Server_Info server,
ffdd6e4d SF	85	__u32 *pexpected_response_sequence_number)
1da177e4 LT	86	{
	87	int rc = 0;
	88	char smb_signature[20];
	89
ffdd6e4d	90	if ((cifs_pdu == NULL) \|\| (server == NULL))
1da177e4 LT	91	return -EINVAL;
1da177e4 LT	92
ffdd6e4d	93	if ((cifs_pdu->Flags2 & SMBFLG2_SECURITY_SIGNATURE) == 0)
1da177e4 LT	94	return rc;
	95
	96	spin_lock(&GlobalMid_Lock);
50c2f753 SF	97	cifs_pdu->Signature.Sequence.SequenceNumber =
50c2f753 SF	98	cpu_to_le32(server->sequence_number);
1da177e4	99	cifs_pdu->Signature.Sequence.Reserved = 0;
50c2f753	100
ad009ac9 SF	101	*pexpected_response_sequence_number = server->sequence_number++;
ad009ac9 SF	102	server->sequence_number++;
1da177e4 LT	103	spin_unlock(&GlobalMid_Lock);
1da177e4 LT	104
9fbc5908	105	rc = cifs_calculate_signature(cifs_pdu, server, smb_signature);
ffdd6e4d	106	if (rc)
1da177e4 LT	107	memset(cifs_pdu->Signature.SecuritySignature, 0, 8);
	108	else
	109	memcpy(cifs_pdu->Signature.SecuritySignature, smb_signature, 8);
	110
	111	return rc;
	112	}
	113
ffdd6e4d	114	static int cifs_calc_signature2(const struct kvec *iov, int n_vec,
9fbc5908	115	struct TCP_Server_Info server, char signature)
84afc29b	116	{
e9917a00	117	int i;
56234e27 SF	118	int rc = 0;
	119	struct {
	120	struct shash_desc shash;
	121	char ctx[crypto_shash_descsize(server->ntlmssp.md5)];
	122	} sdesc;
84afc29b	123
9fbc5908	124	if (iov == NULL \|\| server == NULL \|\| signature == NULL)
e9917a00	125	return -EINVAL;
84afc29b	126
56234e27 SF	127	sdesc.shash.tfm = server->ntlmssp.md5;
56234e27 SF	128	sdesc.shash.flags = 0x0;
9fbc5908	129
56234e27	130	rc = crypto_shash_init(&sdesc.shash);
9fbc5908	131	if (rc) {
56234e27	132	cERROR(1, "could not initialize master crypto API hmacmd5\n");
9fbc5908 SF	133	return rc;
	134	}
	135
	136	if (server->secType == RawNTLMSSP)
56234e27	137	crypto_shash_update(&sdesc.shash,
9fbc5908 SF	138	server->session_key.data.ntlmv2.key,
	139	CIFS_NTLMV2_SESSKEY_SIZE);
	140	else
56234e27	141	crypto_shash_update(&sdesc.shash,
9fbc5908 SF	142	(char *)&server->session_key.data,
	143	server->session_key.len);
	144
50c2f753	145	for (i = 0; i < n_vec; i++) {
745542e2 JL	146	if (iov[i].iov_len == 0)
745542e2 JL	147	continue;
ffdd6e4d	148	if (iov[i].iov_base == NULL) {
56234e27	149	cERROR(1, "null iovec entry");
e9917a00	150	return -EIO;
745542e2	151	}
ffdd6e4d	152	/* The first entry includes a length field (which does not get
e9917a00	153	signed that occupies the first 4 bytes before the header */
ffdd6e4d	154	if (i == 0) {
63d2583f	155	if (iov[0].iov_len <= 8) /* cmd field at offset 9 */
e9917a00	156	break; /* nothing to sign or corrupt header */
56234e27	157	crypto_shash_update(&sdesc.shash,
9fbc5908	158	iov[i].iov_base + 4, iov[i].iov_len - 4);
e9917a00	159	} else
56234e27	160	crypto_shash_update(&sdesc.shash,
9fbc5908	161	iov[i].iov_base, iov[i].iov_len);
e9917a00	162	}
84afc29b	163
56234e27	164	rc = crypto_shash_final(&sdesc.shash, signature);
84afc29b	165
56234e27	166	return 0;
84afc29b SF	167	}
84afc29b SF	168
ffdd6e4d	169	int cifs_sign_smb2(struct kvec iov, int n_vec, struct TCP_Server_Info server,
63d2583f	170	__u32 *pexpected_response_sequence_number)
84afc29b SF	171	{
	172	int rc = 0;
	173	char smb_signature[20];
ffdd6e4d	174	struct smb_hdr *cifs_pdu = iov[0].iov_base;
84afc29b	175
ffdd6e4d	176	if ((cifs_pdu == NULL) \|\| (server == NULL))
84afc29b SF	177	return -EINVAL;
84afc29b SF	178
ffdd6e4d	179	if ((cifs_pdu->Flags2 & SMBFLG2_SECURITY_SIGNATURE) == 0)
84afc29b SF	180	return rc;
84afc29b SF	181
ffdd6e4d SF	182	spin_lock(&GlobalMid_Lock);
ffdd6e4d SF	183	cifs_pdu->Signature.Sequence.SequenceNumber =
84afc29b	184	cpu_to_le32(server->sequence_number);
ffdd6e4d	185	cifs_pdu->Signature.Sequence.Reserved = 0;
84afc29b	186
ffdd6e4d SF	187	*pexpected_response_sequence_number = server->sequence_number++;
	188	server->sequence_number++;
	189	spin_unlock(&GlobalMid_Lock);
84afc29b	190
9fbc5908	191	rc = cifs_calc_signature2(iov, n_vec, server, smb_signature);
ffdd6e4d SF	192	if (rc)
	193	memset(cifs_pdu->Signature.SecuritySignature, 0, 8);
	194	else
	195	memcpy(cifs_pdu->Signature.SecuritySignature, smb_signature, 8);
84afc29b	196
ffdd6e4d	197	return rc;
84afc29b SF	198	}
84afc29b SF	199
b609f06a	200	int cifs_verify_signature(struct smb_hdr *cifs_pdu,
9fbc5908	201	struct TCP_Server_Info *server,
ffdd6e4d	202	__u32 expected_sequence_number)
1da177e4	203	{
9fbc5908	204	int rc;
1da177e4 LT	205	char server_response_sig[8];
	206	char what_we_think_sig_should_be[20];
	207
9fbc5908	208	if (cifs_pdu == NULL \|\| server == NULL)
1da177e4 LT	209	return -EINVAL;
	210
	211	if (cifs_pdu->Command == SMB_COM_NEGOTIATE)
	212	return 0;
	213
	214	if (cifs_pdu->Command == SMB_COM_LOCKING_ANDX) {
50c2f753	215	struct smb_com_lock_req *pSMB =
ffdd6e4d SF	216	(struct smb_com_lock_req *)cifs_pdu;
ffdd6e4d SF	217	if (pSMB->LockType & LOCKING_ANDX_OPLOCK_RELEASE)
1da177e4 LT	218	return 0;
	219	}
	220
50c2f753 SF	221	/* BB what if signatures are supposed to be on for session but
	222	server does not send one? BB */
	223
1da177e4	224	/* Do not need to verify session setups with signature "BSRSPYL " */
50c2f753	225	if (memcmp(cifs_pdu->Signature.SecuritySignature, "BSRSPYL ", 8) == 0)
b6b38f70 JP	226	cFYI(1, "dummy signature received for smb command 0x%x",
b6b38f70 JP	227	cifs_pdu->Command);
1da177e4 LT	228
	229	/* save off the origiginal signature so we can modify the smb and check
	230	its signature against what the server sent */
50c2f753	231	memcpy(server_response_sig, cifs_pdu->Signature.SecuritySignature, 8);
1da177e4	232
50c2f753 SF	233	cifs_pdu->Signature.Sequence.SequenceNumber =
50c2f753 SF	234	cpu_to_le32(expected_sequence_number);
1da177e4 LT	235	cifs_pdu->Signature.Sequence.Reserved = 0;
1da177e4 LT	236
9fbc5908	237	rc = cifs_calculate_signature(cifs_pdu, server,
1da177e4 LT	238	what_we_think_sig_should_be);
1da177e4 LT	239
50c2f753	240	if (rc)
1da177e4 LT	241	return rc;
1da177e4 LT	242
50c2f753 SF	243	/* cifs_dump_mem("what we think it should be: ",
50c2f753 SF	244	what_we_think_sig_should_be, 16); */
1da177e4	245
50c2f753	246	if (memcmp(server_response_sig, what_we_think_sig_should_be, 8))
1da177e4 LT	247	return -EACCES;
	248	else
	249	return 0;
	250
	251	}
	252
	253	/* We fill in key by putting in 40 byte array which was allocated by caller */
9fbc5908	254	int cifs_calculate_session_key(struct session_key key, const char rn,
b609f06a	255	const char *password)
1da177e4 LT	256	{
	257	char temp_key[16];
	258	if ((key == NULL) \|\| (rn == NULL))
	259	return -EINVAL;
	260
	261	E_md4hash(password, temp_key);
b609f06a SF	262	mdfour(key->data.ntlm, temp_key, 16);
	263	memcpy(key->data.ntlm+16, rn, CIFS_SESS_KEY_SIZE);
	264	key->len = 40;
1da177e4 LT	265	return 0;
	266	}
	267
7c7b25bc	268	#ifdef CONFIG_CIFS_WEAK_PW_HASH
4e53a3fb JL	269	void calc_lanman_hash(const char password, const char cryptkey, bool encrypt,
4e53a3fb JL	270	char *lnm_session_key)
7c7b25bc SF	271	{
	272	int i;
	273	char password_with_pad[CIFS_ENCPWD_SIZE];
	274
	275	memset(password_with_pad, 0, CIFS_ENCPWD_SIZE);
4e53a3fb JL	276	if (password)
	277	strncpy(password_with_pad, password, CIFS_ENCPWD_SIZE);
	278
04912d6a	279	if (!encrypt && global_secflags & CIFSSEC_MAY_PLNTXT) {
4e53a3fb JL	280	memset(lnm_session_key, 0, CIFS_SESS_KEY_SIZE);
	281	memcpy(lnm_session_key, password_with_pad,
	282	CIFS_ENCPWD_SIZE);
	283	return;
	284	}
bdc4bf6e	285
7c7b25bc SF	286	/* calculate old style session key */
	287	/* calling toupper is less broken than repeatedly
	288	calling nls_toupper would be since that will never
	289	work for UTF8, but neither handles multibyte code pages
	290	but the only alternative would be converting to UCS-16 (Unicode)
	291	(using a routine something like UniStrupr) then
	292	uppercasing and then converting back from Unicode - which
	293	would only worth doing it if we knew it were utf8. Basically
	294	utf8 and other multibyte codepages each need their own strupper
	295	function since a byte at a time will ont work. */
	296
ef571cad	297	for (i = 0; i < CIFS_ENCPWD_SIZE; i++)
7c7b25bc	298	password_with_pad[i] = toupper(password_with_pad[i]);
7c7b25bc	299
4e53a3fb JL	300	SMBencrypt(password_with_pad, cryptkey, lnm_session_key);
4e53a3fb JL	301
7c7b25bc SF	302	/* clear password before we return/free memory */
	303	memset(password_with_pad, 0, CIFS_ENCPWD_SIZE);
	304	}
	305	#endif /* CIFS_WEAK_PW_HASH */
	306
50c2f753 SF	307	static int calc_ntlmv2_hash(struct cifsSesInfo *ses,
50c2f753 SF	308	const struct nls_table *nls_cp)
a8ee0344 SF	309	{
	310	int rc = 0;
	311	int len;
9fbc5908	312	char nt_hash[CIFS_NTHASH_SIZE];
50c2f753 SF	313	wchar_t *user;
50c2f753 SF	314	wchar_t *domain;
9fbc5908	315	wchar_t *server;
56234e27 SF	316	struct {
	317	struct shash_desc shash;
	318	char ctx[crypto_shash_descsize(ses->server->ntlmssp.hmacmd5)];
	319	} sdesc;
a8ee0344 SF	320
	321	/* calculate md4 hash of password */
	322	E_md4hash(ses->password, nt_hash);
	323
56234e27 SF	324	sdesc.shash.tfm = ses->server->ntlmssp.hmacmd5;
	325	sdesc.shash.flags = 0x0;
	326
9fbc5908 SF	327	crypto_shash_setkey(ses->server->ntlmssp.hmacmd5, nt_hash,
	328	CIFS_NTHASH_SIZE);
	329
56234e27	330	rc = crypto_shash_init(&sdesc.shash);
9fbc5908	331	if (rc) {
56234e27	332	cERROR(1, "could not initialize master crypto API hmacmd5\n");
9fbc5908 SF	333	return rc;
9fbc5908 SF	334	}
a8ee0344 SF	335
a8ee0344 SF	336	/* convert ses->userName to unicode and uppercase */
1717ffc5 SF	337	len = strlen(ses->userName);
1717ffc5 SF	338	user = kmalloc(2 + (len * 2), GFP_KERNEL);
56234e27	339	if (user == NULL)
1717ffc5	340	goto calc_exit_2;
8f2376ad	341	len = cifs_strtoUCS((__le16 *)user, ses->userName, len, nls_cp);
1717ffc5	342	UniStrupr(user);
9fbc5908	343
56234e27	344	crypto_shash_update(&sdesc.shash, (char )user, 2 len);
a8ee0344 SF	345
a8ee0344 SF	346	/* convert ses->domainName to unicode and uppercase */
50c2f753	347	if (ses->domainName) {
1717ffc5	348	len = strlen(ses->domainName);
a8ee0344	349
50c2f753	350	domain = kmalloc(2 + (len * 2), GFP_KERNEL);
56234e27	351	if (domain == NULL)
1717ffc5	352	goto calc_exit_1;
8f2376ad CG	353	len = cifs_strtoUCS((__le16 *)domain, ses->domainName, len,
8f2376ad CG	354	nls_cp);
b609f06a SF	355	/* the following line was removed since it didn't work well
	356	with lower cased domain name that passed as an option.
	357	Maybe converting the domain name earlier makes sense */
	358	/* UniStrupr(domain); */
a8ee0344	359
56234e27	360	crypto_shash_update(&sdesc.shash, (char )domain, 2 len);
50c2f753	361
1717ffc5	362	kfree(domain);
9fbc5908 SF	363	} else if (ses->serverName) {
	364	len = strlen(ses->serverName);
	365
	366	server = kmalloc(2 + (len * 2), GFP_KERNEL);
56234e27	367	if (server == NULL)
9fbc5908 SF	368	goto calc_exit_1;
	369	len = cifs_strtoUCS((__le16 *)server, ses->serverName, len,
	370	nls_cp);
	371	/* the following line was removed since it didn't work well
	372	with lower cased domain name that passed as an option.
	373	Maybe converting the domain name earlier makes sense */
	374	/* UniStrupr(domain); */
	375
56234e27	376	crypto_shash_update(&sdesc.shash, (char )server, 2 len);
9fbc5908 SF	377
9fbc5908 SF	378	kfree(server);
1717ffc5 SF	379	}
	380	calc_exit_1:
	381	kfree(user);
	382	calc_exit_2:
50c2f753	383	/* BB FIXME what about bytes 24 through 40 of the signing key?
1717ffc5	384	compare with the NTLM example */
56234e27	385	rc = crypto_shash_final(&sdesc.shash, ses->server->ntlmv2_hash);
a8ee0344 SF	386
	387	return rc;
	388	}
	389
9fbc5908 SF	390	static int
	391	find_domain_name(struct cifsSesInfo *ses)
	392	{
	393	int rc = 0;
	394	unsigned int attrsize;
	395	unsigned int type;
	396	unsigned char *blobptr;
	397	struct ntlmssp2_name *attrptr;
	398
	399	if (ses->server->tiblob) {
	400	blobptr = ses->server->tiblob;
	401	attrptr = (struct ntlmssp2_name *) blobptr;
	402
	403	while ((type = attrptr->type) != 0) {
	404	blobptr += 2; /* advance attr type */
	405	attrsize = attrptr->length;
	406	blobptr += 2; /* advance attr size */
	407	if (type == NTLMSSP_AV_NB_DOMAIN_NAME) {
	408	if (!ses->domainName) {
	409	ses->domainName =
	410	kmalloc(attrptr->length + 1,
	411	GFP_KERNEL);
	412	if (!ses->domainName)
	413	return -ENOMEM;
	414	cifs_from_ucs2(ses->domainName,
	415	(__le16 *)blobptr,
	416	attrptr->length,
	417	attrptr->length,
	418	load_nls_default(), false);
	419	}
	420	}
	421	blobptr += attrsize; /* advance attr value */
	422	attrptr = (struct ntlmssp2_name *) blobptr;
	423	}
	424	} else {
	425	ses->server->tilen = 2 * sizeof(struct ntlmssp2_name);
	426	ses->server->tiblob = kmalloc(ses->server->tilen, GFP_KERNEL);
	427	if (!ses->server->tiblob) {
	428	ses->server->tilen = 0;
	429	cERROR(1, "Challenge target info allocation failure");
	430	return -ENOMEM;
	431	}
	432	memset(ses->server->tiblob, 0x0, ses->server->tilen);
	433	attrptr = (struct ntlmssp2_name *) ses->server->tiblob;
	434	attrptr->type = cpu_to_le16(NTLMSSP_DOMAIN_TYPE);
	435	}
	436
	437	return rc;
	438	}
	439
	440	static int
	441	CalcNTLMv2_response(const struct TCP_Server_Info *server,
	442	char *v2_session_response)
6d027cfd	443	{
a8ee0344	444	int rc;
56234e27 SF	445	struct {
	446	struct shash_desc shash;
	447	char ctx[crypto_shash_descsize(server->ntlmssp.hmacmd5)];
	448	} sdesc;
9fbc5908	449
56234e27 SF	450	sdesc.shash.tfm = server->ntlmssp.hmacmd5;
56234e27 SF	451	sdesc.shash.flags = 0x0;
9fbc5908 SF	452
	453	crypto_shash_setkey(server->ntlmssp.hmacmd5, server->ntlmv2_hash,
	454	CIFS_HMAC_MD5_HASH_SIZE);
	455
56234e27	456	rc = crypto_shash_init(&sdesc.shash);
9fbc5908	457	if (rc) {
56234e27	458	cERROR(1, "could not initialize master crypto API hmacmd5\n");
9fbc5908 SF	459	return rc;
	460	}
	461
	462	memcpy(v2_session_response + CIFS_SERVER_CHALLENGE_SIZE,
	463	server->cryptKey, CIFS_SERVER_CHALLENGE_SIZE);
56234e27	464	crypto_shash_update(&sdesc.shash,
9fbc5908 SF	465	v2_session_response + CIFS_SERVER_CHALLENGE_SIZE,
	466	sizeof(struct ntlmv2_resp) - CIFS_SERVER_CHALLENGE_SIZE);
	467
	468	if (server->tilen)
56234e27	469	crypto_shash_update(&sdesc.shash,
9fbc5908 SF	470	server->tiblob, server->tilen);
9fbc5908 SF	471
56234e27	472	rc = crypto_shash_final(&sdesc.shash, v2_session_response);
9fbc5908 SF	473
	474	return rc;
	475	}
	476
	477	int
	478	setup_ntlmv2_rsp(struct cifsSesInfo ses, char resp_buf,
	479	const struct nls_table *nls_cp)
	480	{
	481	int rc = 0;
50c2f753	482	struct ntlmv2_resp buf = (struct ntlmv2_resp )resp_buf;
56234e27 SF	483	struct {
	484	struct shash_desc shash;
	485	char ctx[crypto_shash_descsize(ses->server->ntlmssp.hmacmd5)];
	486	} sdesc;
6d027cfd SF	487
	488	buf->blob_signature = cpu_to_le32(0x00000101);
	489	buf->reserved = 0;
	490	buf->time = cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME));
1717ffc5	491	get_random_bytes(&buf->client_chal, sizeof(buf->client_chal));
6d027cfd	492	buf->reserved2 = 0;
9fbc5908 SF	493
	494	if (!ses->domainName) {
	495	rc = find_domain_name(ses);
	496	if (rc) {
	497	cERROR(1, "could not get domain/server name rc %d", rc);
	498	return rc;
	499	}
	500	}
a8ee0344	501
6d027cfd	502	/* calculate buf->ntlmv2_hash */
1717ffc5	503	rc = calc_ntlmv2_hash(ses, nls_cp);
9fbc5908 SF	504	if (rc) {
	505	cERROR(1, "could not get v2 hash rc %d", rc);
	506	return rc;
	507	}
	508	rc = CalcNTLMv2_response(ses->server, resp_buf);
	509	if (rc) {
b6b38f70	510	cERROR(1, "could not get v2 hash rc %d", rc);
9fbc5908 SF	511	return rc;
	512	}
	513
	514	crypto_shash_setkey(ses->server->ntlmssp.hmacmd5,
	515	ses->server->ntlmv2_hash, CIFS_HMAC_MD5_HASH_SIZE);
	516
56234e27 SF	517	sdesc.shash.tfm = ses->server->ntlmssp.hmacmd5;
	518	sdesc.shash.flags = 0x0;
	519
	520	rc = crypto_shash_init(&sdesc.shash);
9fbc5908	521	if (rc) {
56234e27	522	cERROR(1, "could not initialize master crypto API hmacmd5\n");
9fbc5908 SF	523	return rc;
	524	}
	525
56234e27	526	crypto_shash_update(&sdesc.shash, resp_buf, CIFS_HMAC_MD5_HASH_SIZE);
b609f06a	527
56234e27	528	rc = crypto_shash_final(&sdesc.shash,
9fbc5908	529	ses->server->session_key.data.ntlmv2.key);
b609f06a	530
9fbc5908 SF	531	memcpy(&ses->server->session_key.data.ntlmv2.resp, resp_buf,
	532	sizeof(struct ntlmv2_resp));
	533	ses->server->session_key.len = 16 + sizeof(struct ntlmv2_resp);
	534
	535	return rc;
6d027cfd SF	536	}
6d027cfd SF	537
9fbc5908 SF	538	int
9fbc5908 SF	539	calc_seckey(struct TCP_Server_Info *server)
1da177e4	540	{
9fbc5908 SF	541	int rc;
	542	unsigned char sec_key[CIFS_NTLMV2_SESSKEY_SIZE];
	543	struct crypto_blkcipher *tfm_arc4;
	544	struct scatterlist sgin, sgout;
	545	struct blkcipher_desc desc;
	546
	547	get_random_bytes(sec_key, CIFS_NTLMV2_SESSKEY_SIZE);
	548
	549	tfm_arc4 = crypto_alloc_blkcipher("ecb(arc4)",
	550	0, CRYPTO_ALG_ASYNC);
	551	if (!tfm_arc4 \|\| IS_ERR(tfm_arc4)) {
	552	cERROR(1, "could not allocate " "master crypto API arc4\n");
	553	return 1;
	554	}
	555
	556	crypto_blkcipher_setkey(tfm_arc4,
	557	server->session_key.data.ntlmv2.key, CIFS_CPHTXT_SIZE);
	558	sg_init_one(&sgin, sec_key, CIFS_CPHTXT_SIZE);
	559	sg_init_one(&sgout, server->ntlmssp.ciphertext, CIFS_CPHTXT_SIZE);
	560	rc = crypto_blkcipher_encrypt(&desc, &sgout, &sgin, CIFS_CPHTXT_SIZE);
	561
	562	if (!rc)
	563	memcpy(server->session_key.data.ntlmv2.key,
	564	sec_key, CIFS_NTLMV2_SESSKEY_SIZE);
1da177e4	565
9fbc5908	566	crypto_free_blkcipher(tfm_arc4);
1da177e4	567
9fbc5908 SF	568	return 0;
	569	}
	570
	571	void
	572	cifs_crypto_shash_release(struct TCP_Server_Info *server)
	573	{
	574	if (server->ntlmssp.md5)
	575	crypto_free_shash(server->ntlmssp.md5);
	576
	577	if (server->ntlmssp.hmacmd5)
	578	crypto_free_shash(server->ntlmssp.hmacmd5);
	579	}
	580
	581	int
	582	cifs_crypto_shash_allocate(struct TCP_Server_Info *server)
	583	{
	584	server->ntlmssp.hmacmd5 = crypto_alloc_shash("hmac(md5)", 0, 0);
	585	if (!server->ntlmssp.hmacmd5 \|\|
	586	IS_ERR(server->ntlmssp.hmacmd5)) {
56234e27	587	cERROR(1, "could not allocate master crypto API hmacmd5\n");
9fbc5908 SF	588	return 1;
	589	}
	590
	591	server->ntlmssp.md5 = crypto_alloc_shash("md5", 0, 0);
	592	if (!server->ntlmssp.md5 \|\| IS_ERR(server->ntlmssp.md5)) {
56234e27 SF	593	crypto_free_shash(server->ntlmssp.hmacmd5);
	594	cERROR(1, "could not allocate master crypto API md5\n");
	595	return 1;
2d20ca83	596	}
2d20ca83	597
9fbc5908	598	return 0;
1da177e4	599	}