2 * fs/cifs/cifsencrypt.c
4 * Copyright (C) International Business Machines Corp., 2005,2013
5 * Author(s): Steve French (sfrench@us.ibm.com)
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.
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.
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
23 #include <linux/slab.h>
26 #include "cifs_debug.h"
27 #include "cifs_unicode.h"
28 #include "cifsproto.h"
30 #include <linux/ctype.h>
31 #include <linux/random.h>
32 #include <linux/highmem.h>
35 cifs_crypto_shash_md5_allocate(struct TCP_Server_Info *server)
40 if (server->secmech.sdescmd5 != NULL)
41 return 0; /* already allocated */
43 server->secmech.md5 = crypto_alloc_shash("md5", 0, 0);
44 if (IS_ERR(server->secmech.md5)) {
45 cifs_dbg(VFS, "could not allocate crypto md5\n");
46 rc = PTR_ERR(server->secmech.md5);
47 server->secmech.md5 = NULL;
51 size = sizeof(struct shash_desc) +
52 crypto_shash_descsize(server->secmech.md5);
53 server->secmech.sdescmd5 = kmalloc(size, GFP_KERNEL);
54 if (!server->secmech.sdescmd5) {
55 crypto_free_shash(server->secmech.md5);
56 server->secmech.md5 = NULL;
59 server->secmech.sdescmd5->shash.tfm = server->secmech.md5;
60 server->secmech.sdescmd5->shash.flags = 0x0;
66 * Calculate and return the CIFS signature based on the mac key and SMB PDU.
67 * The 16 byte signature must be allocated by the caller. Note we only use the
68 * 1st eight bytes and that the smb header signature field on input contains
69 * the sequence number before this function is called. Also, this function
70 * should be called with the server->srv_mutex held.
72 static int cifs_calc_signature(struct smb_rqst *rqst,
73 struct TCP_Server_Info *server, char *signature)
77 struct kvec *iov = rqst->rq_iov;
78 int n_vec = rqst->rq_nvec;
80 if (iov == NULL || signature == NULL || server == NULL)
83 if (!server->secmech.sdescmd5) {
84 rc = cifs_crypto_shash_md5_allocate(server);
86 cifs_dbg(VFS, "%s: Can't alloc md5 crypto\n", __func__);
91 rc = crypto_shash_init(&server->secmech.sdescmd5->shash);
93 cifs_dbg(VFS, "%s: Could not init md5\n", __func__);
97 rc = crypto_shash_update(&server->secmech.sdescmd5->shash,
98 server->session_key.response, server->session_key.len);
100 cifs_dbg(VFS, "%s: Could not update with response\n", __func__);
104 for (i = 0; i < n_vec; i++) {
105 if (iov[i].iov_len == 0)
107 if (iov[i].iov_base == NULL) {
108 cifs_dbg(VFS, "null iovec entry\n");
111 /* The first entry includes a length field (which does not get
112 signed that occupies the first 4 bytes before the header */
114 if (iov[0].iov_len <= 8) /* cmd field at offset 9 */
115 break; /* nothing to sign or corrupt header */
117 crypto_shash_update(&server->secmech.sdescmd5->shash,
118 iov[i].iov_base + 4, iov[i].iov_len - 4);
121 crypto_shash_update(&server->secmech.sdescmd5->shash,
122 iov[i].iov_base, iov[i].iov_len);
125 cifs_dbg(VFS, "%s: Could not update with payload\n",
131 /* now hash over the rq_pages array */
132 for (i = 0; i < rqst->rq_npages; i++) {
135 cifs_rqst_page_to_kvec(rqst, i, &p_iov);
136 crypto_shash_update(&server->secmech.sdescmd5->shash,
137 p_iov.iov_base, p_iov.iov_len);
138 kunmap(rqst->rq_pages[i]);
141 rc = crypto_shash_final(&server->secmech.sdescmd5->shash, signature);
143 cifs_dbg(VFS, "%s: Could not generate md5 hash\n", __func__);
148 /* must be called with server->srv_mutex held */
149 int cifs_sign_rqst(struct smb_rqst *rqst, struct TCP_Server_Info *server,
150 __u32 *pexpected_response_sequence_number)
153 char smb_signature[20];
154 struct smb_hdr *cifs_pdu = (struct smb_hdr *)rqst->rq_iov[0].iov_base;
156 if ((cifs_pdu == NULL) || (server == NULL))
159 if (!(cifs_pdu->Flags2 & SMBFLG2_SECURITY_SIGNATURE) ||
160 server->tcpStatus == CifsNeedNegotiate)
163 if (!server->session_estab) {
164 memcpy(cifs_pdu->Signature.SecuritySignature, "BSRSPYL", 8);
168 cifs_pdu->Signature.Sequence.SequenceNumber =
169 cpu_to_le32(server->sequence_number);
170 cifs_pdu->Signature.Sequence.Reserved = 0;
172 *pexpected_response_sequence_number = ++server->sequence_number;
173 ++server->sequence_number;
175 rc = cifs_calc_signature(rqst, server, smb_signature);
177 memset(cifs_pdu->Signature.SecuritySignature, 0, 8);
179 memcpy(cifs_pdu->Signature.SecuritySignature, smb_signature, 8);
184 int cifs_sign_smbv(struct kvec *iov, int n_vec, struct TCP_Server_Info *server,
185 __u32 *pexpected_response_sequence)
187 struct smb_rqst rqst = { .rq_iov = iov,
190 return cifs_sign_rqst(&rqst, server, pexpected_response_sequence);
193 /* must be called with server->srv_mutex held */
194 int cifs_sign_smb(struct smb_hdr *cifs_pdu, struct TCP_Server_Info *server,
195 __u32 *pexpected_response_sequence_number)
199 iov.iov_base = cifs_pdu;
200 iov.iov_len = be32_to_cpu(cifs_pdu->smb_buf_length) + 4;
202 return cifs_sign_smbv(&iov, 1, server,
203 pexpected_response_sequence_number);
206 int cifs_verify_signature(struct smb_rqst *rqst,
207 struct TCP_Server_Info *server,
208 __u32 expected_sequence_number)
211 char server_response_sig[8];
212 char what_we_think_sig_should_be[20];
213 struct smb_hdr *cifs_pdu = (struct smb_hdr *)rqst->rq_iov[0].iov_base;
215 if (cifs_pdu == NULL || server == NULL)
218 if (!server->session_estab)
221 if (cifs_pdu->Command == SMB_COM_LOCKING_ANDX) {
222 struct smb_com_lock_req *pSMB =
223 (struct smb_com_lock_req *)cifs_pdu;
224 if (pSMB->LockType & LOCKING_ANDX_OPLOCK_RELEASE)
228 /* BB what if signatures are supposed to be on for session but
229 server does not send one? BB */
231 /* Do not need to verify session setups with signature "BSRSPYL " */
232 if (memcmp(cifs_pdu->Signature.SecuritySignature, "BSRSPYL ", 8) == 0)
233 cifs_dbg(FYI, "dummy signature received for smb command 0x%x\n",
236 /* save off the origiginal signature so we can modify the smb and check
237 its signature against what the server sent */
238 memcpy(server_response_sig, cifs_pdu->Signature.SecuritySignature, 8);
240 cifs_pdu->Signature.Sequence.SequenceNumber =
241 cpu_to_le32(expected_sequence_number);
242 cifs_pdu->Signature.Sequence.Reserved = 0;
244 mutex_lock(&server->srv_mutex);
245 rc = cifs_calc_signature(rqst, server, what_we_think_sig_should_be);
246 mutex_unlock(&server->srv_mutex);
251 /* cifs_dump_mem("what we think it should be: ",
252 what_we_think_sig_should_be, 16); */
254 if (memcmp(server_response_sig, what_we_think_sig_should_be, 8))
261 /* first calculate 24 bytes ntlm response and then 16 byte session key */
262 int setup_ntlm_response(struct cifs_ses *ses, const struct nls_table *nls_cp)
265 unsigned int temp_len = CIFS_SESS_KEY_SIZE + CIFS_AUTH_RESP_SIZE;
266 char temp_key[CIFS_SESS_KEY_SIZE];
271 ses->auth_key.response = kmalloc(temp_len, GFP_KERNEL);
272 if (!ses->auth_key.response)
275 ses->auth_key.len = temp_len;
277 rc = SMBNTencrypt(ses->password, ses->server->cryptkey,
278 ses->auth_key.response + CIFS_SESS_KEY_SIZE, nls_cp);
280 cifs_dbg(FYI, "%s Can't generate NTLM response, error: %d\n",
285 rc = E_md4hash(ses->password, temp_key, nls_cp);
287 cifs_dbg(FYI, "%s Can't generate NT hash, error: %d\n",
292 rc = mdfour(ses->auth_key.response, temp_key, CIFS_SESS_KEY_SIZE);
294 cifs_dbg(FYI, "%s Can't generate NTLM session key, error: %d\n",
300 #ifdef CONFIG_CIFS_WEAK_PW_HASH
301 int calc_lanman_hash(const char *password, const char *cryptkey, bool encrypt,
302 char *lnm_session_key)
306 char password_with_pad[CIFS_ENCPWD_SIZE];
308 memset(password_with_pad, 0, CIFS_ENCPWD_SIZE);
310 strncpy(password_with_pad, password, CIFS_ENCPWD_SIZE);
312 if (!encrypt && global_secflags & CIFSSEC_MAY_PLNTXT) {
313 memcpy(lnm_session_key, password_with_pad,
318 /* calculate old style session key */
319 /* calling toupper is less broken than repeatedly
320 calling nls_toupper would be since that will never
321 work for UTF8, but neither handles multibyte code pages
322 but the only alternative would be converting to UCS-16 (Unicode)
323 (using a routine something like UniStrupr) then
324 uppercasing and then converting back from Unicode - which
325 would only worth doing it if we knew it were utf8. Basically
326 utf8 and other multibyte codepages each need their own strupper
327 function since a byte at a time will ont work. */
329 for (i = 0; i < CIFS_ENCPWD_SIZE; i++)
330 password_with_pad[i] = toupper(password_with_pad[i]);
332 rc = SMBencrypt(password_with_pad, cryptkey, lnm_session_key);
336 #endif /* CIFS_WEAK_PW_HASH */
338 /* Build a proper attribute value/target info pairs blob.
339 * Fill in netbios and dns domain name and workstation name
340 * and client time (total five av pairs and + one end of fields indicator.
341 * Allocate domain name which gets freed when session struct is deallocated.
344 build_avpair_blob(struct cifs_ses *ses, const struct nls_table *nls_cp)
347 unsigned int size = 2 * sizeof(struct ntlmssp2_name);
348 char *defdmname = "WORKGROUP";
349 unsigned char *blobptr;
350 struct ntlmssp2_name *attrptr;
352 if (!ses->domainName) {
353 ses->domainName = kstrdup(defdmname, GFP_KERNEL);
354 if (!ses->domainName)
358 dlen = strlen(ses->domainName);
361 * The length of this blob is two times the size of a
362 * structure (av pair) which holds name/size
363 * ( for NTLMSSP_AV_NB_DOMAIN_NAME followed by NTLMSSP_AV_EOL ) +
364 * unicode length of a netbios domain name
366 ses->auth_key.len = size + 2 * dlen;
367 ses->auth_key.response = kzalloc(ses->auth_key.len, GFP_KERNEL);
368 if (!ses->auth_key.response) {
369 ses->auth_key.len = 0;
373 blobptr = ses->auth_key.response;
374 attrptr = (struct ntlmssp2_name *) blobptr;
377 * As defined in MS-NTLM 3.3.2, just this av pair field
378 * is sufficient as part of the temp
380 attrptr->type = cpu_to_le16(NTLMSSP_AV_NB_DOMAIN_NAME);
381 attrptr->length = cpu_to_le16(2 * dlen);
382 blobptr = (unsigned char *)attrptr + sizeof(struct ntlmssp2_name);
383 cifs_strtoUTF16((__le16 *)blobptr, ses->domainName, dlen, nls_cp);
388 /* Server has provided av pairs/target info in the type 2 challenge
389 * packet and we have plucked it and stored within smb session.
390 * We parse that blob here to find netbios domain name to be used
391 * as part of ntlmv2 authentication (in Target String), if not already
392 * specified on the command line.
393 * If this function returns without any error but without fetching
394 * domain name, authentication may fail against some server but
395 * may not fail against other (those who are not very particular
396 * about target string i.e. for some, just user name might suffice.
399 find_domain_name(struct cifs_ses *ses, const struct nls_table *nls_cp)
401 unsigned int attrsize;
403 unsigned int onesize = sizeof(struct ntlmssp2_name);
404 unsigned char *blobptr;
405 unsigned char *blobend;
406 struct ntlmssp2_name *attrptr;
408 if (!ses->auth_key.len || !ses->auth_key.response)
411 blobptr = ses->auth_key.response;
412 blobend = blobptr + ses->auth_key.len;
414 while (blobptr + onesize < blobend) {
415 attrptr = (struct ntlmssp2_name *) blobptr;
416 type = le16_to_cpu(attrptr->type);
417 if (type == NTLMSSP_AV_EOL)
419 blobptr += 2; /* advance attr type */
420 attrsize = le16_to_cpu(attrptr->length);
421 blobptr += 2; /* advance attr size */
422 if (blobptr + attrsize > blobend)
424 if (type == NTLMSSP_AV_NB_DOMAIN_NAME) {
425 if (!attrsize || attrsize >= CIFS_MAX_DOMAINNAME_LEN)
427 if (!ses->domainName) {
429 kmalloc(attrsize + 1, GFP_KERNEL);
430 if (!ses->domainName)
432 cifs_from_utf16(ses->domainName,
433 (__le16 *)blobptr, attrsize, attrsize,
438 blobptr += attrsize; /* advance attr value */
444 static int calc_ntlmv2_hash(struct cifs_ses *ses, char *ntlmv2_hash,
445 const struct nls_table *nls_cp)
449 char nt_hash[CIFS_NTHASH_SIZE];
454 if (!ses->server->secmech.sdeschmacmd5) {
455 cifs_dbg(VFS, "%s: can't generate ntlmv2 hash\n", __func__);
459 /* calculate md4 hash of password */
460 E_md4hash(ses->password, nt_hash, nls_cp);
462 rc = crypto_shash_setkey(ses->server->secmech.hmacmd5, nt_hash,
465 cifs_dbg(VFS, "%s: Could not set NT Hash as a key\n", __func__);
469 rc = crypto_shash_init(&ses->server->secmech.sdeschmacmd5->shash);
471 cifs_dbg(VFS, "%s: could not init hmacmd5\n", __func__);
475 /* convert ses->user_name to unicode */
476 len = ses->user_name ? strlen(ses->user_name) : 0;
477 user = kmalloc(2 + (len * 2), GFP_KERNEL);
484 len = cifs_strtoUTF16(user, ses->user_name, len, nls_cp);
487 memset(user, '\0', 2);
490 rc = crypto_shash_update(&ses->server->secmech.sdeschmacmd5->shash,
491 (char *)user, 2 * len);
494 cifs_dbg(VFS, "%s: Could not update with user\n", __func__);
498 /* convert ses->domainName to unicode and uppercase */
499 if (ses->domainName) {
500 len = strlen(ses->domainName);
502 domain = kmalloc(2 + (len * 2), GFP_KERNEL);
503 if (domain == NULL) {
507 len = cifs_strtoUTF16((__le16 *)domain, ses->domainName, len,
510 crypto_shash_update(&ses->server->secmech.sdeschmacmd5->shash,
511 (char *)domain, 2 * len);
514 cifs_dbg(VFS, "%s: Could not update with domain\n",
518 } else if (ses->serverName) {
519 len = strlen(ses->serverName);
521 server = kmalloc(2 + (len * 2), GFP_KERNEL);
522 if (server == NULL) {
526 len = cifs_strtoUTF16((__le16 *)server, ses->serverName, len,
529 crypto_shash_update(&ses->server->secmech.sdeschmacmd5->shash,
530 (char *)server, 2 * len);
533 cifs_dbg(VFS, "%s: Could not update with server\n",
539 rc = crypto_shash_final(&ses->server->secmech.sdeschmacmd5->shash,
542 cifs_dbg(VFS, "%s: Could not generate md5 hash\n", __func__);
548 CalcNTLMv2_response(const struct cifs_ses *ses, char *ntlmv2_hash)
551 struct ntlmv2_resp *ntlmv2 = (struct ntlmv2_resp *)
552 (ses->auth_key.response + CIFS_SESS_KEY_SIZE);
553 unsigned int hash_len;
555 /* The MD5 hash starts at challenge_key.key */
556 hash_len = ses->auth_key.len - (CIFS_SESS_KEY_SIZE +
557 offsetof(struct ntlmv2_resp, challenge.key[0]));
559 if (!ses->server->secmech.sdeschmacmd5) {
560 cifs_dbg(VFS, "%s: can't generate ntlmv2 hash\n", __func__);
564 rc = crypto_shash_setkey(ses->server->secmech.hmacmd5,
565 ntlmv2_hash, CIFS_HMAC_MD5_HASH_SIZE);
567 cifs_dbg(VFS, "%s: Could not set NTLMV2 Hash as a key\n",
572 rc = crypto_shash_init(&ses->server->secmech.sdeschmacmd5->shash);
574 cifs_dbg(VFS, "%s: could not init hmacmd5\n", __func__);
578 if (ses->server->negflavor == CIFS_NEGFLAVOR_EXTENDED)
579 memcpy(ntlmv2->challenge.key,
580 ses->ntlmssp->cryptkey, CIFS_SERVER_CHALLENGE_SIZE);
582 memcpy(ntlmv2->challenge.key,
583 ses->server->cryptkey, CIFS_SERVER_CHALLENGE_SIZE);
584 rc = crypto_shash_update(&ses->server->secmech.sdeschmacmd5->shash,
585 ntlmv2->challenge.key, hash_len);
587 cifs_dbg(VFS, "%s: Could not update with response\n", __func__);
591 /* Note that the MD5 digest over writes anon.challenge_key.key */
592 rc = crypto_shash_final(&ses->server->secmech.sdeschmacmd5->shash,
593 ntlmv2->ntlmv2_hash);
595 cifs_dbg(VFS, "%s: Could not generate md5 hash\n", __func__);
600 static int crypto_hmacmd5_alloc(struct TCP_Server_Info *server)
605 /* check if already allocated */
606 if (server->secmech.sdeschmacmd5)
609 server->secmech.hmacmd5 = crypto_alloc_shash("hmac(md5)", 0, 0);
610 if (IS_ERR(server->secmech.hmacmd5)) {
611 cifs_dbg(VFS, "could not allocate crypto hmacmd5\n");
612 rc = PTR_ERR(server->secmech.hmacmd5);
613 server->secmech.hmacmd5 = NULL;
617 size = sizeof(struct shash_desc) +
618 crypto_shash_descsize(server->secmech.hmacmd5);
619 server->secmech.sdeschmacmd5 = kmalloc(size, GFP_KERNEL);
620 if (!server->secmech.sdeschmacmd5) {
621 crypto_free_shash(server->secmech.hmacmd5);
622 server->secmech.hmacmd5 = NULL;
625 server->secmech.sdeschmacmd5->shash.tfm = server->secmech.hmacmd5;
626 server->secmech.sdeschmacmd5->shash.flags = 0x0;
632 setup_ntlmv2_rsp(struct cifs_ses *ses, const struct nls_table *nls_cp)
637 struct ntlmv2_resp *ntlmv2;
638 char ntlmv2_hash[16];
639 unsigned char *tiblob = NULL; /* target info blob */
641 if (ses->server->negflavor == CIFS_NEGFLAVOR_EXTENDED) {
642 if (!ses->domainName) {
643 rc = find_domain_name(ses, nls_cp);
645 cifs_dbg(VFS, "error %d finding domain name\n",
647 goto setup_ntlmv2_rsp_ret;
651 rc = build_avpair_blob(ses, nls_cp);
653 cifs_dbg(VFS, "error %d building av pair blob\n", rc);
654 goto setup_ntlmv2_rsp_ret;
658 baselen = CIFS_SESS_KEY_SIZE + sizeof(struct ntlmv2_resp);
659 tilen = ses->auth_key.len;
660 tiblob = ses->auth_key.response;
662 ses->auth_key.response = kmalloc(baselen + tilen, GFP_KERNEL);
663 if (!ses->auth_key.response) {
665 ses->auth_key.len = 0;
666 goto setup_ntlmv2_rsp_ret;
668 ses->auth_key.len += baselen;
670 ntlmv2 = (struct ntlmv2_resp *)
671 (ses->auth_key.response + CIFS_SESS_KEY_SIZE);
672 ntlmv2->blob_signature = cpu_to_le32(0x00000101);
673 ntlmv2->reserved = 0;
674 /* Must be within 5 minutes of the server */
675 ntlmv2->time = cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME));
676 get_random_bytes(&ntlmv2->client_chal, sizeof(ntlmv2->client_chal));
677 ntlmv2->reserved2 = 0;
679 memcpy(ses->auth_key.response + baselen, tiblob, tilen);
681 rc = crypto_hmacmd5_alloc(ses->server);
683 cifs_dbg(VFS, "could not crypto alloc hmacmd5 rc %d\n", rc);
684 goto setup_ntlmv2_rsp_ret;
687 /* calculate ntlmv2_hash */
688 rc = calc_ntlmv2_hash(ses, ntlmv2_hash, nls_cp);
690 cifs_dbg(VFS, "could not get v2 hash rc %d\n", rc);
691 goto setup_ntlmv2_rsp_ret;
694 /* calculate first part of the client response (CR1) */
695 rc = CalcNTLMv2_response(ses, ntlmv2_hash);
697 cifs_dbg(VFS, "Could not calculate CR1 rc: %d\n", rc);
698 goto setup_ntlmv2_rsp_ret;
701 /* now calculate the session key for NTLMv2 */
702 rc = crypto_shash_setkey(ses->server->secmech.hmacmd5,
703 ntlmv2_hash, CIFS_HMAC_MD5_HASH_SIZE);
705 cifs_dbg(VFS, "%s: Could not set NTLMV2 Hash as a key\n",
707 goto setup_ntlmv2_rsp_ret;
710 rc = crypto_shash_init(&ses->server->secmech.sdeschmacmd5->shash);
712 cifs_dbg(VFS, "%s: Could not init hmacmd5\n", __func__);
713 goto setup_ntlmv2_rsp_ret;
716 rc = crypto_shash_update(&ses->server->secmech.sdeschmacmd5->shash,
718 CIFS_HMAC_MD5_HASH_SIZE);
720 cifs_dbg(VFS, "%s: Could not update with response\n", __func__);
721 goto setup_ntlmv2_rsp_ret;
724 rc = crypto_shash_final(&ses->server->secmech.sdeschmacmd5->shash,
725 ses->auth_key.response);
727 cifs_dbg(VFS, "%s: Could not generate md5 hash\n", __func__);
729 setup_ntlmv2_rsp_ret:
736 calc_seckey(struct cifs_ses *ses)
739 struct crypto_blkcipher *tfm_arc4;
740 struct scatterlist sgin, sgout;
741 struct blkcipher_desc desc;
742 unsigned char sec_key[CIFS_SESS_KEY_SIZE]; /* a nonce */
744 get_random_bytes(sec_key, CIFS_SESS_KEY_SIZE);
746 tfm_arc4 = crypto_alloc_blkcipher("ecb(arc4)", 0, CRYPTO_ALG_ASYNC);
747 if (IS_ERR(tfm_arc4)) {
748 rc = PTR_ERR(tfm_arc4);
749 cifs_dbg(VFS, "could not allocate crypto API arc4\n");
755 rc = crypto_blkcipher_setkey(tfm_arc4, ses->auth_key.response,
758 cifs_dbg(VFS, "%s: Could not set response as a key\n",
763 sg_init_one(&sgin, sec_key, CIFS_SESS_KEY_SIZE);
764 sg_init_one(&sgout, ses->ntlmssp->ciphertext, CIFS_CPHTXT_SIZE);
766 rc = crypto_blkcipher_encrypt(&desc, &sgout, &sgin, CIFS_CPHTXT_SIZE);
768 cifs_dbg(VFS, "could not encrypt session key rc: %d\n", rc);
769 crypto_free_blkcipher(tfm_arc4);
773 /* make secondary_key/nonce as session key */
774 memcpy(ses->auth_key.response, sec_key, CIFS_SESS_KEY_SIZE);
775 /* and make len as that of session key only */
776 ses->auth_key.len = CIFS_SESS_KEY_SIZE;
778 crypto_free_blkcipher(tfm_arc4);
784 cifs_crypto_shash_release(struct TCP_Server_Info *server)
786 if (server->secmech.cmacaes) {
787 crypto_free_shash(server->secmech.cmacaes);
788 server->secmech.cmacaes = NULL;
791 if (server->secmech.hmacsha256) {
792 crypto_free_shash(server->secmech.hmacsha256);
793 server->secmech.hmacsha256 = NULL;
796 if (server->secmech.md5) {
797 crypto_free_shash(server->secmech.md5);
798 server->secmech.md5 = NULL;
801 if (server->secmech.hmacmd5) {
802 crypto_free_shash(server->secmech.hmacmd5);
803 server->secmech.hmacmd5 = NULL;
806 kfree(server->secmech.sdesccmacaes);
807 server->secmech.sdesccmacaes = NULL;
808 kfree(server->secmech.sdeschmacsha256);
809 server->secmech.sdeschmacsha256 = NULL;
810 kfree(server->secmech.sdeschmacmd5);
811 server->secmech.sdeschmacmd5 = NULL;
812 kfree(server->secmech.sdescmd5);
813 server->secmech.sdescmd5 = NULL;