2 * fs/cifs/cifsencrypt.c
4 * Encryption and hashing operations relating to NTLM, NTLMv2. See MS-NLMP
5 * for more detailed information
7 * Copyright (C) International Business Machines Corp., 2005,2013
8 * Author(s): Steve French (sfrench@us.ibm.com)
10 * This library is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU Lesser General Public License as published
12 * by the Free Software Foundation; either version 2.1 of the License, or
13 * (at your option) any later version.
15 * This library is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
18 * the GNU Lesser General Public License for more details.
20 * You should have received a copy of the GNU Lesser General Public License
21 * along with this library; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
26 #include <linux/slab.h>
29 #include "cifs_debug.h"
30 #include "cifs_unicode.h"
31 #include "cifsproto.h"
33 #include <linux/ctype.h>
34 #include <linux/random.h>
35 #include <linux/highmem.h>
36 #include <crypto/skcipher.h>
37 #include <crypto/aead.h>
39 int __cifs_calc_signature(struct smb_rqst *rqst,
41 struct TCP_Server_Info *server, char *signature,
42 struct shash_desc *shash)
46 struct kvec *iov = rqst->rq_iov;
47 int n_vec = rqst->rq_nvec;
49 for (i = start; i < n_vec; i++) {
50 if (iov[i].iov_len == 0)
52 if (iov[i].iov_base == NULL) {
53 cifs_dbg(VFS, "null iovec entry\n");
56 if (i == 1 && iov[1].iov_len <= 4)
57 break; /* nothing to sign or corrupt header */
58 rc = crypto_shash_update(shash,
59 iov[i].iov_base, iov[i].iov_len);
61 cifs_dbg(VFS, "%s: Could not update with payload\n",
67 /* now hash over the rq_pages array */
68 for (i = 0; i < rqst->rq_npages; i++) {
70 unsigned int len, offset;
72 rqst_page_get_length(rqst, i, &len, &offset);
74 kaddr = (char *) kmap(rqst->rq_pages[i]) + offset;
76 crypto_shash_update(shash, kaddr, len);
78 kunmap(rqst->rq_pages[i]);
81 rc = crypto_shash_final(shash, signature);
83 cifs_dbg(VFS, "%s: Could not generate hash\n", __func__);
89 * Calculate and return the CIFS signature based on the mac key and SMB PDU.
90 * The 16 byte signature must be allocated by the caller. Note we only use the
91 * 1st eight bytes and that the smb header signature field on input contains
92 * the sequence number before this function is called. Also, this function
93 * should be called with the server->srv_mutex held.
95 static int cifs_calc_signature(struct smb_rqst *rqst,
96 struct TCP_Server_Info *server, char *signature)
100 if (!rqst->rq_iov || !signature || !server)
103 rc = cifs_alloc_hash("md5", &server->secmech.md5,
104 &server->secmech.sdescmd5);
108 rc = crypto_shash_init(&server->secmech.sdescmd5->shash);
110 cifs_dbg(VFS, "%s: Could not init md5\n", __func__);
114 rc = crypto_shash_update(&server->secmech.sdescmd5->shash,
115 server->session_key.response, server->session_key.len);
117 cifs_dbg(VFS, "%s: Could not update with response\n", __func__);
121 return __cifs_calc_signature(rqst, 1, server, signature,
122 &server->secmech.sdescmd5->shash);
125 /* must be called with server->srv_mutex held */
126 int cifs_sign_rqst(struct smb_rqst *rqst, struct TCP_Server_Info *server,
127 __u32 *pexpected_response_sequence_number)
130 char smb_signature[20];
131 struct smb_hdr *cifs_pdu = (struct smb_hdr *)rqst->rq_iov[0].iov_base;
133 if (rqst->rq_iov[0].iov_len != 4 ||
134 rqst->rq_iov[0].iov_base + 4 != rqst->rq_iov[1].iov_base)
137 if ((cifs_pdu == NULL) || (server == NULL))
140 if (!(cifs_pdu->Flags2 & SMBFLG2_SECURITY_SIGNATURE) ||
141 server->tcpStatus == CifsNeedNegotiate)
144 if (!server->session_estab) {
145 memcpy(cifs_pdu->Signature.SecuritySignature, "BSRSPYL", 8);
149 cifs_pdu->Signature.Sequence.SequenceNumber =
150 cpu_to_le32(server->sequence_number);
151 cifs_pdu->Signature.Sequence.Reserved = 0;
153 *pexpected_response_sequence_number = ++server->sequence_number;
154 ++server->sequence_number;
156 rc = cifs_calc_signature(rqst, server, smb_signature);
158 memset(cifs_pdu->Signature.SecuritySignature, 0, 8);
160 memcpy(cifs_pdu->Signature.SecuritySignature, smb_signature, 8);
165 int cifs_sign_smbv(struct kvec *iov, int n_vec, struct TCP_Server_Info *server,
166 __u32 *pexpected_response_sequence)
168 struct smb_rqst rqst = { .rq_iov = iov,
171 return cifs_sign_rqst(&rqst, server, pexpected_response_sequence);
174 /* must be called with server->srv_mutex held */
175 int cifs_sign_smb(struct smb_hdr *cifs_pdu, struct TCP_Server_Info *server,
176 __u32 *pexpected_response_sequence_number)
180 iov[0].iov_base = cifs_pdu;
182 iov[1].iov_base = (char *)cifs_pdu + 4;
183 iov[1].iov_len = be32_to_cpu(cifs_pdu->smb_buf_length);
185 return cifs_sign_smbv(iov, 2, server,
186 pexpected_response_sequence_number);
189 int cifs_verify_signature(struct smb_rqst *rqst,
190 struct TCP_Server_Info *server,
191 __u32 expected_sequence_number)
194 char server_response_sig[8];
195 char what_we_think_sig_should_be[20];
196 struct smb_hdr *cifs_pdu = (struct smb_hdr *)rqst->rq_iov[0].iov_base;
198 if (rqst->rq_iov[0].iov_len != 4 ||
199 rqst->rq_iov[0].iov_base + 4 != rqst->rq_iov[1].iov_base)
202 if (cifs_pdu == NULL || server == NULL)
205 if (!server->session_estab)
208 if (cifs_pdu->Command == SMB_COM_LOCKING_ANDX) {
209 struct smb_com_lock_req *pSMB =
210 (struct smb_com_lock_req *)cifs_pdu;
211 if (pSMB->LockType & LOCKING_ANDX_OPLOCK_RELEASE)
215 /* BB what if signatures are supposed to be on for session but
216 server does not send one? BB */
218 /* Do not need to verify session setups with signature "BSRSPYL " */
219 if (memcmp(cifs_pdu->Signature.SecuritySignature, "BSRSPYL ", 8) == 0)
220 cifs_dbg(FYI, "dummy signature received for smb command 0x%x\n",
223 /* save off the origiginal signature so we can modify the smb and check
224 its signature against what the server sent */
225 memcpy(server_response_sig, cifs_pdu->Signature.SecuritySignature, 8);
227 cifs_pdu->Signature.Sequence.SequenceNumber =
228 cpu_to_le32(expected_sequence_number);
229 cifs_pdu->Signature.Sequence.Reserved = 0;
231 mutex_lock(&server->srv_mutex);
232 rc = cifs_calc_signature(rqst, server, what_we_think_sig_should_be);
233 mutex_unlock(&server->srv_mutex);
238 /* cifs_dump_mem("what we think it should be: ",
239 what_we_think_sig_should_be, 16); */
241 if (memcmp(server_response_sig, what_we_think_sig_should_be, 8))
248 /* first calculate 24 bytes ntlm response and then 16 byte session key */
249 int setup_ntlm_response(struct cifs_ses *ses, const struct nls_table *nls_cp)
252 unsigned int temp_len = CIFS_SESS_KEY_SIZE + CIFS_AUTH_RESP_SIZE;
253 char temp_key[CIFS_SESS_KEY_SIZE];
258 ses->auth_key.response = kmalloc(temp_len, GFP_KERNEL);
259 if (!ses->auth_key.response)
262 ses->auth_key.len = temp_len;
264 rc = SMBNTencrypt(ses->password, ses->server->cryptkey,
265 ses->auth_key.response + CIFS_SESS_KEY_SIZE, nls_cp);
267 cifs_dbg(FYI, "%s Can't generate NTLM response, error: %d\n",
272 rc = E_md4hash(ses->password, temp_key, nls_cp);
274 cifs_dbg(FYI, "%s Can't generate NT hash, error: %d\n",
279 rc = mdfour(ses->auth_key.response, temp_key, CIFS_SESS_KEY_SIZE);
281 cifs_dbg(FYI, "%s Can't generate NTLM session key, error: %d\n",
287 #ifdef CONFIG_CIFS_WEAK_PW_HASH
288 int calc_lanman_hash(const char *password, const char *cryptkey, bool encrypt,
289 char *lnm_session_key)
293 char password_with_pad[CIFS_ENCPWD_SIZE] = {0};
296 strncpy(password_with_pad, password, CIFS_ENCPWD_SIZE);
298 if (!encrypt && global_secflags & CIFSSEC_MAY_PLNTXT) {
299 memcpy(lnm_session_key, password_with_pad,
304 /* calculate old style session key */
305 /* calling toupper is less broken than repeatedly
306 calling nls_toupper would be since that will never
307 work for UTF8, but neither handles multibyte code pages
308 but the only alternative would be converting to UCS-16 (Unicode)
309 (using a routine something like UniStrupr) then
310 uppercasing and then converting back from Unicode - which
311 would only worth doing it if we knew it were utf8. Basically
312 utf8 and other multibyte codepages each need their own strupper
313 function since a byte at a time will ont work. */
315 for (i = 0; i < CIFS_ENCPWD_SIZE; i++)
316 password_with_pad[i] = toupper(password_with_pad[i]);
318 rc = SMBencrypt(password_with_pad, cryptkey, lnm_session_key);
322 #endif /* CIFS_WEAK_PW_HASH */
324 /* Build a proper attribute value/target info pairs blob.
325 * Fill in netbios and dns domain name and workstation name
326 * and client time (total five av pairs and + one end of fields indicator.
327 * Allocate domain name which gets freed when session struct is deallocated.
330 build_avpair_blob(struct cifs_ses *ses, const struct nls_table *nls_cp)
333 unsigned int size = 2 * sizeof(struct ntlmssp2_name);
334 char *defdmname = "WORKGROUP";
335 unsigned char *blobptr;
336 struct ntlmssp2_name *attrptr;
338 if (!ses->domainName) {
339 ses->domainName = kstrdup(defdmname, GFP_KERNEL);
340 if (!ses->domainName)
344 dlen = strlen(ses->domainName);
347 * The length of this blob is two times the size of a
348 * structure (av pair) which holds name/size
349 * ( for NTLMSSP_AV_NB_DOMAIN_NAME followed by NTLMSSP_AV_EOL ) +
350 * unicode length of a netbios domain name
352 ses->auth_key.len = size + 2 * dlen;
353 ses->auth_key.response = kzalloc(ses->auth_key.len, GFP_KERNEL);
354 if (!ses->auth_key.response) {
355 ses->auth_key.len = 0;
359 blobptr = ses->auth_key.response;
360 attrptr = (struct ntlmssp2_name *) blobptr;
363 * As defined in MS-NTLM 3.3.2, just this av pair field
364 * is sufficient as part of the temp
366 attrptr->type = cpu_to_le16(NTLMSSP_AV_NB_DOMAIN_NAME);
367 attrptr->length = cpu_to_le16(2 * dlen);
368 blobptr = (unsigned char *)attrptr + sizeof(struct ntlmssp2_name);
369 cifs_strtoUTF16((__le16 *)blobptr, ses->domainName, dlen, nls_cp);
374 /* Server has provided av pairs/target info in the type 2 challenge
375 * packet and we have plucked it and stored within smb session.
376 * We parse that blob here to find netbios domain name to be used
377 * as part of ntlmv2 authentication (in Target String), if not already
378 * specified on the command line.
379 * If this function returns without any error but without fetching
380 * domain name, authentication may fail against some server but
381 * may not fail against other (those who are not very particular
382 * about target string i.e. for some, just user name might suffice.
385 find_domain_name(struct cifs_ses *ses, const struct nls_table *nls_cp)
387 unsigned int attrsize;
389 unsigned int onesize = sizeof(struct ntlmssp2_name);
390 unsigned char *blobptr;
391 unsigned char *blobend;
392 struct ntlmssp2_name *attrptr;
394 if (!ses->auth_key.len || !ses->auth_key.response)
397 blobptr = ses->auth_key.response;
398 blobend = blobptr + ses->auth_key.len;
400 while (blobptr + onesize < blobend) {
401 attrptr = (struct ntlmssp2_name *) blobptr;
402 type = le16_to_cpu(attrptr->type);
403 if (type == NTLMSSP_AV_EOL)
405 blobptr += 2; /* advance attr type */
406 attrsize = le16_to_cpu(attrptr->length);
407 blobptr += 2; /* advance attr size */
408 if (blobptr + attrsize > blobend)
410 if (type == NTLMSSP_AV_NB_DOMAIN_NAME) {
411 if (!attrsize || attrsize >= CIFS_MAX_DOMAINNAME_LEN)
413 if (!ses->domainName) {
415 kmalloc(attrsize + 1, GFP_KERNEL);
416 if (!ses->domainName)
418 cifs_from_utf16(ses->domainName,
419 (__le16 *)blobptr, attrsize, attrsize,
420 nls_cp, NO_MAP_UNI_RSVD);
424 blobptr += attrsize; /* advance attr value */
430 /* Server has provided av pairs/target info in the type 2 challenge
431 * packet and we have plucked it and stored within smb session.
432 * We parse that blob here to find the server given timestamp
433 * as part of ntlmv2 authentication (or local current time as
434 * default in case of failure)
437 find_timestamp(struct cifs_ses *ses)
439 unsigned int attrsize;
441 unsigned int onesize = sizeof(struct ntlmssp2_name);
442 unsigned char *blobptr;
443 unsigned char *blobend;
444 struct ntlmssp2_name *attrptr;
447 if (!ses->auth_key.len || !ses->auth_key.response)
450 blobptr = ses->auth_key.response;
451 blobend = blobptr + ses->auth_key.len;
453 while (blobptr + onesize < blobend) {
454 attrptr = (struct ntlmssp2_name *) blobptr;
455 type = le16_to_cpu(attrptr->type);
456 if (type == NTLMSSP_AV_EOL)
458 blobptr += 2; /* advance attr type */
459 attrsize = le16_to_cpu(attrptr->length);
460 blobptr += 2; /* advance attr size */
461 if (blobptr + attrsize > blobend)
463 if (type == NTLMSSP_AV_TIMESTAMP) {
464 if (attrsize == sizeof(u64))
465 return *((__le64 *)blobptr);
467 blobptr += attrsize; /* advance attr value */
470 ktime_get_real_ts(&ts);
471 return cpu_to_le64(cifs_UnixTimeToNT(ts));
474 static int calc_ntlmv2_hash(struct cifs_ses *ses, char *ntlmv2_hash,
475 const struct nls_table *nls_cp)
479 char nt_hash[CIFS_NTHASH_SIZE];
484 if (!ses->server->secmech.sdeschmacmd5) {
485 cifs_dbg(VFS, "%s: can't generate ntlmv2 hash\n", __func__);
489 /* calculate md4 hash of password */
490 E_md4hash(ses->password, nt_hash, nls_cp);
492 rc = crypto_shash_setkey(ses->server->secmech.hmacmd5, nt_hash,
495 cifs_dbg(VFS, "%s: Could not set NT Hash as a key\n", __func__);
499 rc = crypto_shash_init(&ses->server->secmech.sdeschmacmd5->shash);
501 cifs_dbg(VFS, "%s: could not init hmacmd5\n", __func__);
505 /* convert ses->user_name to unicode */
506 len = ses->user_name ? strlen(ses->user_name) : 0;
507 user = kmalloc(2 + (len * 2), GFP_KERNEL);
514 len = cifs_strtoUTF16(user, ses->user_name, len, nls_cp);
517 memset(user, '\0', 2);
520 rc = crypto_shash_update(&ses->server->secmech.sdeschmacmd5->shash,
521 (char *)user, 2 * len);
524 cifs_dbg(VFS, "%s: Could not update with user\n", __func__);
528 /* convert ses->domainName to unicode and uppercase */
529 if (ses->domainName) {
530 len = strlen(ses->domainName);
532 domain = kmalloc(2 + (len * 2), GFP_KERNEL);
533 if (domain == NULL) {
537 len = cifs_strtoUTF16((__le16 *)domain, ses->domainName, len,
540 crypto_shash_update(&ses->server->secmech.sdeschmacmd5->shash,
541 (char *)domain, 2 * len);
544 cifs_dbg(VFS, "%s: Could not update with domain\n",
549 /* We use ses->serverName if no domain name available */
550 len = strlen(ses->serverName);
552 server = kmalloc(2 + (len * 2), GFP_KERNEL);
553 if (server == NULL) {
557 len = cifs_strtoUTF16((__le16 *)server, ses->serverName, len,
560 crypto_shash_update(&ses->server->secmech.sdeschmacmd5->shash,
561 (char *)server, 2 * len);
564 cifs_dbg(VFS, "%s: Could not update with server\n",
570 rc = crypto_shash_final(&ses->server->secmech.sdeschmacmd5->shash,
573 cifs_dbg(VFS, "%s: Could not generate md5 hash\n", __func__);
579 CalcNTLMv2_response(const struct cifs_ses *ses, char *ntlmv2_hash)
582 struct ntlmv2_resp *ntlmv2 = (struct ntlmv2_resp *)
583 (ses->auth_key.response + CIFS_SESS_KEY_SIZE);
584 unsigned int hash_len;
586 /* The MD5 hash starts at challenge_key.key */
587 hash_len = ses->auth_key.len - (CIFS_SESS_KEY_SIZE +
588 offsetof(struct ntlmv2_resp, challenge.key[0]));
590 if (!ses->server->secmech.sdeschmacmd5) {
591 cifs_dbg(VFS, "%s: can't generate ntlmv2 hash\n", __func__);
595 rc = crypto_shash_setkey(ses->server->secmech.hmacmd5,
596 ntlmv2_hash, CIFS_HMAC_MD5_HASH_SIZE);
598 cifs_dbg(VFS, "%s: Could not set NTLMV2 Hash as a key\n",
603 rc = crypto_shash_init(&ses->server->secmech.sdeschmacmd5->shash);
605 cifs_dbg(VFS, "%s: could not init hmacmd5\n", __func__);
609 if (ses->server->negflavor == CIFS_NEGFLAVOR_EXTENDED)
610 memcpy(ntlmv2->challenge.key,
611 ses->ntlmssp->cryptkey, CIFS_SERVER_CHALLENGE_SIZE);
613 memcpy(ntlmv2->challenge.key,
614 ses->server->cryptkey, CIFS_SERVER_CHALLENGE_SIZE);
615 rc = crypto_shash_update(&ses->server->secmech.sdeschmacmd5->shash,
616 ntlmv2->challenge.key, hash_len);
618 cifs_dbg(VFS, "%s: Could not update with response\n", __func__);
622 /* Note that the MD5 digest over writes anon.challenge_key.key */
623 rc = crypto_shash_final(&ses->server->secmech.sdeschmacmd5->shash,
624 ntlmv2->ntlmv2_hash);
626 cifs_dbg(VFS, "%s: Could not generate md5 hash\n", __func__);
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 */
640 __le64 rsp_timestamp;
642 if (ses->server->negflavor == CIFS_NEGFLAVOR_EXTENDED) {
643 if (!ses->domainName) {
644 if (ses->domainAuto) {
645 rc = find_domain_name(ses, nls_cp);
647 cifs_dbg(VFS, "error %d finding domain name\n",
649 goto setup_ntlmv2_rsp_ret;
652 ses->domainName = kstrdup("", GFP_KERNEL);
656 rc = build_avpair_blob(ses, nls_cp);
658 cifs_dbg(VFS, "error %d building av pair blob\n", rc);
659 goto setup_ntlmv2_rsp_ret;
663 /* Must be within 5 minutes of the server (or in range +/-2h
664 * in case of Mac OS X), so simply carry over server timestamp
665 * (as Windows 7 does)
667 rsp_timestamp = find_timestamp(ses);
669 baselen = CIFS_SESS_KEY_SIZE + sizeof(struct ntlmv2_resp);
670 tilen = ses->auth_key.len;
671 tiblob = ses->auth_key.response;
673 ses->auth_key.response = kmalloc(baselen + tilen, GFP_KERNEL);
674 if (!ses->auth_key.response) {
676 ses->auth_key.len = 0;
677 goto setup_ntlmv2_rsp_ret;
679 ses->auth_key.len += baselen;
681 ntlmv2 = (struct ntlmv2_resp *)
682 (ses->auth_key.response + CIFS_SESS_KEY_SIZE);
683 ntlmv2->blob_signature = cpu_to_le32(0x00000101);
684 ntlmv2->reserved = 0;
685 ntlmv2->time = rsp_timestamp;
687 get_random_bytes(&ntlmv2->client_chal, sizeof(ntlmv2->client_chal));
688 ntlmv2->reserved2 = 0;
690 memcpy(ses->auth_key.response + baselen, tiblob, tilen);
692 mutex_lock(&ses->server->srv_mutex);
694 rc = cifs_alloc_hash("hmac(md5)",
695 &ses->server->secmech.hmacmd5,
696 &ses->server->secmech.sdeschmacmd5);
701 /* calculate ntlmv2_hash */
702 rc = calc_ntlmv2_hash(ses, ntlmv2_hash, nls_cp);
704 cifs_dbg(VFS, "could not get v2 hash rc %d\n", rc);
708 /* calculate first part of the client response (CR1) */
709 rc = CalcNTLMv2_response(ses, ntlmv2_hash);
711 cifs_dbg(VFS, "Could not calculate CR1 rc: %d\n", rc);
715 /* now calculate the session key for NTLMv2 */
716 rc = crypto_shash_setkey(ses->server->secmech.hmacmd5,
717 ntlmv2_hash, CIFS_HMAC_MD5_HASH_SIZE);
719 cifs_dbg(VFS, "%s: Could not set NTLMV2 Hash as a key\n",
724 rc = crypto_shash_init(&ses->server->secmech.sdeschmacmd5->shash);
726 cifs_dbg(VFS, "%s: Could not init hmacmd5\n", __func__);
730 rc = crypto_shash_update(&ses->server->secmech.sdeschmacmd5->shash,
732 CIFS_HMAC_MD5_HASH_SIZE);
734 cifs_dbg(VFS, "%s: Could not update with response\n", __func__);
738 rc = crypto_shash_final(&ses->server->secmech.sdeschmacmd5->shash,
739 ses->auth_key.response);
741 cifs_dbg(VFS, "%s: Could not generate md5 hash\n", __func__);
744 mutex_unlock(&ses->server->srv_mutex);
745 setup_ntlmv2_rsp_ret:
752 calc_seckey(struct cifs_ses *ses)
755 struct crypto_skcipher *tfm_arc4;
756 struct scatterlist sgin, sgout;
757 struct skcipher_request *req;
758 unsigned char *sec_key;
760 sec_key = kmalloc(CIFS_SESS_KEY_SIZE, GFP_KERNEL);
764 get_random_bytes(sec_key, CIFS_SESS_KEY_SIZE);
766 tfm_arc4 = crypto_alloc_skcipher("ecb(arc4)", 0, CRYPTO_ALG_ASYNC);
767 if (IS_ERR(tfm_arc4)) {
768 rc = PTR_ERR(tfm_arc4);
769 cifs_dbg(VFS, "could not allocate crypto API arc4\n");
773 rc = crypto_skcipher_setkey(tfm_arc4, ses->auth_key.response,
776 cifs_dbg(VFS, "%s: Could not set response as a key\n",
778 goto out_free_cipher;
781 req = skcipher_request_alloc(tfm_arc4, GFP_KERNEL);
784 cifs_dbg(VFS, "could not allocate crypto API arc4 request\n");
785 goto out_free_cipher;
788 sg_init_one(&sgin, sec_key, CIFS_SESS_KEY_SIZE);
789 sg_init_one(&sgout, ses->ntlmssp->ciphertext, CIFS_CPHTXT_SIZE);
791 skcipher_request_set_callback(req, 0, NULL, NULL);
792 skcipher_request_set_crypt(req, &sgin, &sgout, CIFS_CPHTXT_SIZE, NULL);
794 rc = crypto_skcipher_encrypt(req);
795 skcipher_request_free(req);
797 cifs_dbg(VFS, "could not encrypt session key rc: %d\n", rc);
798 goto out_free_cipher;
801 /* make secondary_key/nonce as session key */
802 memcpy(ses->auth_key.response, sec_key, CIFS_SESS_KEY_SIZE);
803 /* and make len as that of session key only */
804 ses->auth_key.len = CIFS_SESS_KEY_SIZE;
807 crypto_free_skcipher(tfm_arc4);
814 cifs_crypto_secmech_release(struct TCP_Server_Info *server)
816 if (server->secmech.cmacaes) {
817 crypto_free_shash(server->secmech.cmacaes);
818 server->secmech.cmacaes = NULL;
821 if (server->secmech.hmacsha256) {
822 crypto_free_shash(server->secmech.hmacsha256);
823 server->secmech.hmacsha256 = NULL;
826 if (server->secmech.md5) {
827 crypto_free_shash(server->secmech.md5);
828 server->secmech.md5 = NULL;
831 if (server->secmech.sha512) {
832 crypto_free_shash(server->secmech.sha512);
833 server->secmech.sha512 = NULL;
836 if (server->secmech.hmacmd5) {
837 crypto_free_shash(server->secmech.hmacmd5);
838 server->secmech.hmacmd5 = NULL;
841 if (server->secmech.ccmaesencrypt) {
842 crypto_free_aead(server->secmech.ccmaesencrypt);
843 server->secmech.ccmaesencrypt = NULL;
846 if (server->secmech.ccmaesdecrypt) {
847 crypto_free_aead(server->secmech.ccmaesdecrypt);
848 server->secmech.ccmaesdecrypt = NULL;
851 kfree(server->secmech.sdesccmacaes);
852 server->secmech.sdesccmacaes = NULL;
853 kfree(server->secmech.sdeschmacsha256);
854 server->secmech.sdeschmacsha256 = NULL;
855 kfree(server->secmech.sdeschmacmd5);
856 server->secmech.sdeschmacmd5 = NULL;
857 kfree(server->secmech.sdescmd5);
858 server->secmech.sdescmd5 = NULL;
859 kfree(server->secmech.sdescsha512);
860 server->secmech.sdescsha512 = NULL;