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
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,
40 struct TCP_Server_Info *server, char *signature,
41 struct shash_desc *shash)
45 struct kvec *iov = rqst->rq_iov;
46 int n_vec = rqst->rq_nvec;
47 int is_smb2 = server->vals->header_preamble_size == 0;
49 /* iov[0] is actual data and not the rfc1002 length for SMB2+ */
51 if (iov[0].iov_len <= 4)
55 if (n_vec < 2 || iov[0].iov_len != 4)
57 i = 1; /* skip rfc1002 length */
60 for (; i < n_vec; i++) {
61 if (iov[i].iov_len == 0)
63 if (iov[i].iov_base == NULL) {
64 cifs_dbg(VFS, "null iovec entry\n");
68 rc = crypto_shash_update(shash,
69 iov[i].iov_base, iov[i].iov_len);
71 cifs_dbg(VFS, "%s: Could not update with payload\n",
77 /* now hash over the rq_pages array */
78 for (i = 0; i < rqst->rq_npages; i++) {
80 unsigned int len, offset;
82 rqst_page_get_length(rqst, i, &len, &offset);
84 kaddr = (char *) kmap(rqst->rq_pages[i]) + offset;
86 rc = crypto_shash_update(shash, kaddr, len);
88 cifs_dbg(VFS, "%s: Could not update with payload\n",
90 kunmap(rqst->rq_pages[i]);
94 kunmap(rqst->rq_pages[i]);
97 rc = crypto_shash_final(shash, signature);
99 cifs_dbg(VFS, "%s: Could not generate hash\n", __func__);
105 * Calculate and return the CIFS signature based on the mac key and SMB PDU.
106 * The 16 byte signature must be allocated by the caller. Note we only use the
107 * 1st eight bytes and that the smb header signature field on input contains
108 * the sequence number before this function is called. Also, this function
109 * should be called with the server->srv_mutex held.
111 static int cifs_calc_signature(struct smb_rqst *rqst,
112 struct TCP_Server_Info *server, char *signature)
116 if (!rqst->rq_iov || !signature || !server)
119 rc = cifs_alloc_hash("md5", &server->secmech.md5,
120 &server->secmech.sdescmd5);
124 rc = crypto_shash_init(&server->secmech.sdescmd5->shash);
126 cifs_dbg(VFS, "%s: Could not init md5\n", __func__);
130 rc = crypto_shash_update(&server->secmech.sdescmd5->shash,
131 server->session_key.response, server->session_key.len);
133 cifs_dbg(VFS, "%s: Could not update with response\n", __func__);
137 return __cifs_calc_signature(rqst, server, signature,
138 &server->secmech.sdescmd5->shash);
141 /* must be called with server->srv_mutex held */
142 int cifs_sign_rqst(struct smb_rqst *rqst, struct TCP_Server_Info *server,
143 __u32 *pexpected_response_sequence_number)
146 char smb_signature[20];
147 struct smb_hdr *cifs_pdu = (struct smb_hdr *)rqst->rq_iov[0].iov_base;
149 if (rqst->rq_iov[0].iov_len != 4 ||
150 rqst->rq_iov[0].iov_base + 4 != rqst->rq_iov[1].iov_base)
153 if ((cifs_pdu == NULL) || (server == NULL))
156 if (!(cifs_pdu->Flags2 & SMBFLG2_SECURITY_SIGNATURE) ||
157 server->tcpStatus == CifsNeedNegotiate)
160 if (!server->session_estab) {
161 memcpy(cifs_pdu->Signature.SecuritySignature, "BSRSPYL", 8);
165 cifs_pdu->Signature.Sequence.SequenceNumber =
166 cpu_to_le32(server->sequence_number);
167 cifs_pdu->Signature.Sequence.Reserved = 0;
169 *pexpected_response_sequence_number = ++server->sequence_number;
170 ++server->sequence_number;
172 rc = cifs_calc_signature(rqst, server, smb_signature);
174 memset(cifs_pdu->Signature.SecuritySignature, 0, 8);
176 memcpy(cifs_pdu->Signature.SecuritySignature, smb_signature, 8);
181 int cifs_sign_smbv(struct kvec *iov, int n_vec, struct TCP_Server_Info *server,
182 __u32 *pexpected_response_sequence)
184 struct smb_rqst rqst = { .rq_iov = iov,
187 return cifs_sign_rqst(&rqst, server, pexpected_response_sequence);
190 /* must be called with server->srv_mutex held */
191 int cifs_sign_smb(struct smb_hdr *cifs_pdu, struct TCP_Server_Info *server,
192 __u32 *pexpected_response_sequence_number)
196 iov[0].iov_base = cifs_pdu;
198 iov[1].iov_base = (char *)cifs_pdu + 4;
199 iov[1].iov_len = be32_to_cpu(cifs_pdu->smb_buf_length);
201 return cifs_sign_smbv(iov, 2, server,
202 pexpected_response_sequence_number);
205 int cifs_verify_signature(struct smb_rqst *rqst,
206 struct TCP_Server_Info *server,
207 __u32 expected_sequence_number)
210 char server_response_sig[8];
211 char what_we_think_sig_should_be[20];
212 struct smb_hdr *cifs_pdu = (struct smb_hdr *)rqst->rq_iov[0].iov_base;
214 if (rqst->rq_iov[0].iov_len != 4 ||
215 rqst->rq_iov[0].iov_base + 4 != rqst->rq_iov[1].iov_base)
218 if (cifs_pdu == NULL || server == NULL)
221 if (!server->session_estab)
224 if (cifs_pdu->Command == SMB_COM_LOCKING_ANDX) {
225 struct smb_com_lock_req *pSMB =
226 (struct smb_com_lock_req *)cifs_pdu;
227 if (pSMB->LockType & LOCKING_ANDX_OPLOCK_RELEASE)
231 /* BB what if signatures are supposed to be on for session but
232 server does not send one? BB */
234 /* Do not need to verify session setups with signature "BSRSPYL " */
235 if (memcmp(cifs_pdu->Signature.SecuritySignature, "BSRSPYL ", 8) == 0)
236 cifs_dbg(FYI, "dummy signature received for smb command 0x%x\n",
239 /* save off the origiginal signature so we can modify the smb and check
240 its signature against what the server sent */
241 memcpy(server_response_sig, cifs_pdu->Signature.SecuritySignature, 8);
243 cifs_pdu->Signature.Sequence.SequenceNumber =
244 cpu_to_le32(expected_sequence_number);
245 cifs_pdu->Signature.Sequence.Reserved = 0;
247 mutex_lock(&server->srv_mutex);
248 rc = cifs_calc_signature(rqst, server, what_we_think_sig_should_be);
249 mutex_unlock(&server->srv_mutex);
254 /* cifs_dump_mem("what we think it should be: ",
255 what_we_think_sig_should_be, 16); */
257 if (memcmp(server_response_sig, what_we_think_sig_should_be, 8))
264 /* first calculate 24 bytes ntlm response and then 16 byte session key */
265 int setup_ntlm_response(struct cifs_ses *ses, const struct nls_table *nls_cp)
268 unsigned int temp_len = CIFS_SESS_KEY_SIZE + CIFS_AUTH_RESP_SIZE;
269 char temp_key[CIFS_SESS_KEY_SIZE];
274 ses->auth_key.response = kmalloc(temp_len, GFP_KERNEL);
275 if (!ses->auth_key.response)
278 ses->auth_key.len = temp_len;
280 rc = SMBNTencrypt(ses->password, ses->server->cryptkey,
281 ses->auth_key.response + CIFS_SESS_KEY_SIZE, nls_cp);
283 cifs_dbg(FYI, "%s Can't generate NTLM response, error: %d\n",
288 rc = E_md4hash(ses->password, temp_key, nls_cp);
290 cifs_dbg(FYI, "%s Can't generate NT hash, error: %d\n",
295 rc = mdfour(ses->auth_key.response, temp_key, CIFS_SESS_KEY_SIZE);
297 cifs_dbg(FYI, "%s Can't generate NTLM session key, error: %d\n",
303 #ifdef CONFIG_CIFS_WEAK_PW_HASH
304 int calc_lanman_hash(const char *password, const char *cryptkey, bool encrypt,
305 char *lnm_session_key)
309 char password_with_pad[CIFS_ENCPWD_SIZE] = {0};
312 for (len = 0; len < CIFS_ENCPWD_SIZE; len++)
316 memcpy(password_with_pad, password, len);
319 if (!encrypt && global_secflags & CIFSSEC_MAY_PLNTXT) {
320 memcpy(lnm_session_key, password_with_pad,
325 /* calculate old style session key */
326 /* calling toupper is less broken than repeatedly
327 calling nls_toupper would be since that will never
328 work for UTF8, but neither handles multibyte code pages
329 but the only alternative would be converting to UCS-16 (Unicode)
330 (using a routine something like UniStrupr) then
331 uppercasing and then converting back from Unicode - which
332 would only worth doing it if we knew it were utf8. Basically
333 utf8 and other multibyte codepages each need their own strupper
334 function since a byte at a time will ont work. */
336 for (i = 0; i < CIFS_ENCPWD_SIZE; i++)
337 password_with_pad[i] = toupper(password_with_pad[i]);
339 rc = SMBencrypt(password_with_pad, cryptkey, lnm_session_key);
343 #endif /* CIFS_WEAK_PW_HASH */
345 /* Build a proper attribute value/target info pairs blob.
346 * Fill in netbios and dns domain name and workstation name
347 * and client time (total five av pairs and + one end of fields indicator.
348 * Allocate domain name which gets freed when session struct is deallocated.
351 build_avpair_blob(struct cifs_ses *ses, const struct nls_table *nls_cp)
354 unsigned int size = 2 * sizeof(struct ntlmssp2_name);
355 char *defdmname = "WORKGROUP";
356 unsigned char *blobptr;
357 struct ntlmssp2_name *attrptr;
359 if (!ses->domainName) {
360 ses->domainName = kstrdup(defdmname, GFP_KERNEL);
361 if (!ses->domainName)
365 dlen = strlen(ses->domainName);
368 * The length of this blob is two times the size of a
369 * structure (av pair) which holds name/size
370 * ( for NTLMSSP_AV_NB_DOMAIN_NAME followed by NTLMSSP_AV_EOL ) +
371 * unicode length of a netbios domain name
373 ses->auth_key.len = size + 2 * dlen;
374 ses->auth_key.response = kzalloc(ses->auth_key.len, GFP_KERNEL);
375 if (!ses->auth_key.response) {
376 ses->auth_key.len = 0;
380 blobptr = ses->auth_key.response;
381 attrptr = (struct ntlmssp2_name *) blobptr;
384 * As defined in MS-NTLM 3.3.2, just this av pair field
385 * is sufficient as part of the temp
387 attrptr->type = cpu_to_le16(NTLMSSP_AV_NB_DOMAIN_NAME);
388 attrptr->length = cpu_to_le16(2 * dlen);
389 blobptr = (unsigned char *)attrptr + sizeof(struct ntlmssp2_name);
390 cifs_strtoUTF16((__le16 *)blobptr, ses->domainName, dlen, nls_cp);
395 /* Server has provided av pairs/target info in the type 2 challenge
396 * packet and we have plucked it and stored within smb session.
397 * We parse that blob here to find netbios domain name to be used
398 * as part of ntlmv2 authentication (in Target String), if not already
399 * specified on the command line.
400 * If this function returns without any error but without fetching
401 * domain name, authentication may fail against some server but
402 * may not fail against other (those who are not very particular
403 * about target string i.e. for some, just user name might suffice.
406 find_domain_name(struct cifs_ses *ses, const struct nls_table *nls_cp)
408 unsigned int attrsize;
410 unsigned int onesize = sizeof(struct ntlmssp2_name);
411 unsigned char *blobptr;
412 unsigned char *blobend;
413 struct ntlmssp2_name *attrptr;
415 if (!ses->auth_key.len || !ses->auth_key.response)
418 blobptr = ses->auth_key.response;
419 blobend = blobptr + ses->auth_key.len;
421 while (blobptr + onesize < blobend) {
422 attrptr = (struct ntlmssp2_name *) blobptr;
423 type = le16_to_cpu(attrptr->type);
424 if (type == NTLMSSP_AV_EOL)
426 blobptr += 2; /* advance attr type */
427 attrsize = le16_to_cpu(attrptr->length);
428 blobptr += 2; /* advance attr size */
429 if (blobptr + attrsize > blobend)
431 if (type == NTLMSSP_AV_NB_DOMAIN_NAME) {
432 if (!attrsize || attrsize >= CIFS_MAX_DOMAINNAME_LEN)
434 if (!ses->domainName) {
436 kmalloc(attrsize + 1, GFP_KERNEL);
437 if (!ses->domainName)
439 cifs_from_utf16(ses->domainName,
440 (__le16 *)blobptr, attrsize, attrsize,
441 nls_cp, NO_MAP_UNI_RSVD);
445 blobptr += attrsize; /* advance attr value */
451 /* Server has provided av pairs/target info in the type 2 challenge
452 * packet and we have plucked it and stored within smb session.
453 * We parse that blob here to find the server given timestamp
454 * as part of ntlmv2 authentication (or local current time as
455 * default in case of failure)
458 find_timestamp(struct cifs_ses *ses)
460 unsigned int attrsize;
462 unsigned int onesize = sizeof(struct ntlmssp2_name);
463 unsigned char *blobptr;
464 unsigned char *blobend;
465 struct ntlmssp2_name *attrptr;
466 struct timespec64 ts;
468 if (!ses->auth_key.len || !ses->auth_key.response)
471 blobptr = ses->auth_key.response;
472 blobend = blobptr + ses->auth_key.len;
474 while (blobptr + onesize < blobend) {
475 attrptr = (struct ntlmssp2_name *) blobptr;
476 type = le16_to_cpu(attrptr->type);
477 if (type == NTLMSSP_AV_EOL)
479 blobptr += 2; /* advance attr type */
480 attrsize = le16_to_cpu(attrptr->length);
481 blobptr += 2; /* advance attr size */
482 if (blobptr + attrsize > blobend)
484 if (type == NTLMSSP_AV_TIMESTAMP) {
485 if (attrsize == sizeof(u64))
486 return *((__le64 *)blobptr);
488 blobptr += attrsize; /* advance attr value */
491 ktime_get_real_ts64(&ts);
492 return cpu_to_le64(cifs_UnixTimeToNT(ts));
495 static int calc_ntlmv2_hash(struct cifs_ses *ses, char *ntlmv2_hash,
496 const struct nls_table *nls_cp)
500 char nt_hash[CIFS_NTHASH_SIZE];
505 if (!ses->server->secmech.sdeschmacmd5) {
506 cifs_dbg(VFS, "%s: can't generate ntlmv2 hash\n", __func__);
510 /* calculate md4 hash of password */
511 E_md4hash(ses->password, nt_hash, nls_cp);
513 rc = crypto_shash_setkey(ses->server->secmech.hmacmd5, nt_hash,
516 cifs_dbg(VFS, "%s: Could not set NT Hash as a key\n", __func__);
520 rc = crypto_shash_init(&ses->server->secmech.sdeschmacmd5->shash);
522 cifs_dbg(VFS, "%s: could not init hmacmd5\n", __func__);
526 /* convert ses->user_name to unicode */
527 len = ses->user_name ? strlen(ses->user_name) : 0;
528 user = kmalloc(2 + (len * 2), GFP_KERNEL);
535 len = cifs_strtoUTF16(user, ses->user_name, len, nls_cp);
538 memset(user, '\0', 2);
541 rc = crypto_shash_update(&ses->server->secmech.sdeschmacmd5->shash,
542 (char *)user, 2 * len);
545 cifs_dbg(VFS, "%s: Could not update with user\n", __func__);
549 /* convert ses->domainName to unicode and uppercase */
550 if (ses->domainName) {
551 len = strlen(ses->domainName);
553 domain = kmalloc(2 + (len * 2), GFP_KERNEL);
554 if (domain == NULL) {
558 len = cifs_strtoUTF16((__le16 *)domain, ses->domainName, len,
561 crypto_shash_update(&ses->server->secmech.sdeschmacmd5->shash,
562 (char *)domain, 2 * len);
565 cifs_dbg(VFS, "%s: Could not update with domain\n",
570 /* We use ses->serverName if no domain name available */
571 len = strlen(ses->serverName);
573 server = kmalloc(2 + (len * 2), GFP_KERNEL);
574 if (server == NULL) {
578 len = cifs_strtoUTF16((__le16 *)server, ses->serverName, len,
581 crypto_shash_update(&ses->server->secmech.sdeschmacmd5->shash,
582 (char *)server, 2 * len);
585 cifs_dbg(VFS, "%s: Could not update with server\n",
591 rc = crypto_shash_final(&ses->server->secmech.sdeschmacmd5->shash,
594 cifs_dbg(VFS, "%s: Could not generate md5 hash\n", __func__);
600 CalcNTLMv2_response(const struct cifs_ses *ses, char *ntlmv2_hash)
603 struct ntlmv2_resp *ntlmv2 = (struct ntlmv2_resp *)
604 (ses->auth_key.response + CIFS_SESS_KEY_SIZE);
605 unsigned int hash_len;
607 /* The MD5 hash starts at challenge_key.key */
608 hash_len = ses->auth_key.len - (CIFS_SESS_KEY_SIZE +
609 offsetof(struct ntlmv2_resp, challenge.key[0]));
611 if (!ses->server->secmech.sdeschmacmd5) {
612 cifs_dbg(VFS, "%s: can't generate ntlmv2 hash\n", __func__);
616 rc = crypto_shash_setkey(ses->server->secmech.hmacmd5,
617 ntlmv2_hash, CIFS_HMAC_MD5_HASH_SIZE);
619 cifs_dbg(VFS, "%s: Could not set NTLMV2 Hash as a key\n",
624 rc = crypto_shash_init(&ses->server->secmech.sdeschmacmd5->shash);
626 cifs_dbg(VFS, "%s: could not init hmacmd5\n", __func__);
630 if (ses->server->negflavor == CIFS_NEGFLAVOR_EXTENDED)
631 memcpy(ntlmv2->challenge.key,
632 ses->ntlmssp->cryptkey, CIFS_SERVER_CHALLENGE_SIZE);
634 memcpy(ntlmv2->challenge.key,
635 ses->server->cryptkey, CIFS_SERVER_CHALLENGE_SIZE);
636 rc = crypto_shash_update(&ses->server->secmech.sdeschmacmd5->shash,
637 ntlmv2->challenge.key, hash_len);
639 cifs_dbg(VFS, "%s: Could not update with response\n", __func__);
643 /* Note that the MD5 digest over writes anon.challenge_key.key */
644 rc = crypto_shash_final(&ses->server->secmech.sdeschmacmd5->shash,
645 ntlmv2->ntlmv2_hash);
647 cifs_dbg(VFS, "%s: Could not generate md5 hash\n", __func__);
653 setup_ntlmv2_rsp(struct cifs_ses *ses, const struct nls_table *nls_cp)
658 struct ntlmv2_resp *ntlmv2;
659 char ntlmv2_hash[16];
660 unsigned char *tiblob = NULL; /* target info blob */
661 __le64 rsp_timestamp;
663 if (ses->server->negflavor == CIFS_NEGFLAVOR_EXTENDED) {
664 if (!ses->domainName) {
665 if (ses->domainAuto) {
666 rc = find_domain_name(ses, nls_cp);
668 cifs_dbg(VFS, "error %d finding domain name\n",
670 goto setup_ntlmv2_rsp_ret;
673 ses->domainName = kstrdup("", GFP_KERNEL);
677 rc = build_avpair_blob(ses, nls_cp);
679 cifs_dbg(VFS, "error %d building av pair blob\n", rc);
680 goto setup_ntlmv2_rsp_ret;
684 /* Must be within 5 minutes of the server (or in range +/-2h
685 * in case of Mac OS X), so simply carry over server timestamp
686 * (as Windows 7 does)
688 rsp_timestamp = find_timestamp(ses);
690 baselen = CIFS_SESS_KEY_SIZE + sizeof(struct ntlmv2_resp);
691 tilen = ses->auth_key.len;
692 tiblob = ses->auth_key.response;
694 ses->auth_key.response = kmalloc(baselen + tilen, GFP_KERNEL);
695 if (!ses->auth_key.response) {
697 ses->auth_key.len = 0;
698 goto setup_ntlmv2_rsp_ret;
700 ses->auth_key.len += baselen;
702 ntlmv2 = (struct ntlmv2_resp *)
703 (ses->auth_key.response + CIFS_SESS_KEY_SIZE);
704 ntlmv2->blob_signature = cpu_to_le32(0x00000101);
705 ntlmv2->reserved = 0;
706 ntlmv2->time = rsp_timestamp;
708 get_random_bytes(&ntlmv2->client_chal, sizeof(ntlmv2->client_chal));
709 ntlmv2->reserved2 = 0;
711 memcpy(ses->auth_key.response + baselen, tiblob, tilen);
713 mutex_lock(&ses->server->srv_mutex);
715 rc = cifs_alloc_hash("hmac(md5)",
716 &ses->server->secmech.hmacmd5,
717 &ses->server->secmech.sdeschmacmd5);
722 /* calculate ntlmv2_hash */
723 rc = calc_ntlmv2_hash(ses, ntlmv2_hash, nls_cp);
725 cifs_dbg(VFS, "could not get v2 hash rc %d\n", rc);
729 /* calculate first part of the client response (CR1) */
730 rc = CalcNTLMv2_response(ses, ntlmv2_hash);
732 cifs_dbg(VFS, "Could not calculate CR1 rc: %d\n", rc);
736 /* now calculate the session key for NTLMv2 */
737 rc = crypto_shash_setkey(ses->server->secmech.hmacmd5,
738 ntlmv2_hash, CIFS_HMAC_MD5_HASH_SIZE);
740 cifs_dbg(VFS, "%s: Could not set NTLMV2 Hash as a key\n",
745 rc = crypto_shash_init(&ses->server->secmech.sdeschmacmd5->shash);
747 cifs_dbg(VFS, "%s: Could not init hmacmd5\n", __func__);
751 rc = crypto_shash_update(&ses->server->secmech.sdeschmacmd5->shash,
753 CIFS_HMAC_MD5_HASH_SIZE);
755 cifs_dbg(VFS, "%s: Could not update with response\n", __func__);
759 rc = crypto_shash_final(&ses->server->secmech.sdeschmacmd5->shash,
760 ses->auth_key.response);
762 cifs_dbg(VFS, "%s: Could not generate md5 hash\n", __func__);
765 mutex_unlock(&ses->server->srv_mutex);
766 setup_ntlmv2_rsp_ret:
773 calc_seckey(struct cifs_ses *ses)
776 struct crypto_skcipher *tfm_arc4;
777 struct scatterlist sgin, sgout;
778 struct skcipher_request *req;
779 unsigned char *sec_key;
781 sec_key = kmalloc(CIFS_SESS_KEY_SIZE, GFP_KERNEL);
785 get_random_bytes(sec_key, CIFS_SESS_KEY_SIZE);
787 tfm_arc4 = crypto_alloc_skcipher("ecb(arc4)", 0, CRYPTO_ALG_ASYNC);
788 if (IS_ERR(tfm_arc4)) {
789 rc = PTR_ERR(tfm_arc4);
790 cifs_dbg(VFS, "could not allocate crypto API arc4\n");
794 rc = crypto_skcipher_setkey(tfm_arc4, ses->auth_key.response,
797 cifs_dbg(VFS, "%s: Could not set response as a key\n",
799 goto out_free_cipher;
802 req = skcipher_request_alloc(tfm_arc4, GFP_KERNEL);
805 cifs_dbg(VFS, "could not allocate crypto API arc4 request\n");
806 goto out_free_cipher;
809 sg_init_one(&sgin, sec_key, CIFS_SESS_KEY_SIZE);
810 sg_init_one(&sgout, ses->ntlmssp->ciphertext, CIFS_CPHTXT_SIZE);
812 skcipher_request_set_callback(req, 0, NULL, NULL);
813 skcipher_request_set_crypt(req, &sgin, &sgout, CIFS_CPHTXT_SIZE, NULL);
815 rc = crypto_skcipher_encrypt(req);
816 skcipher_request_free(req);
818 cifs_dbg(VFS, "could not encrypt session key rc: %d\n", rc);
819 goto out_free_cipher;
822 /* make secondary_key/nonce as session key */
823 memcpy(ses->auth_key.response, sec_key, CIFS_SESS_KEY_SIZE);
824 /* and make len as that of session key only */
825 ses->auth_key.len = CIFS_SESS_KEY_SIZE;
828 crypto_free_skcipher(tfm_arc4);
835 cifs_crypto_secmech_release(struct TCP_Server_Info *server)
837 if (server->secmech.cmacaes) {
838 crypto_free_shash(server->secmech.cmacaes);
839 server->secmech.cmacaes = NULL;
842 if (server->secmech.hmacsha256) {
843 crypto_free_shash(server->secmech.hmacsha256);
844 server->secmech.hmacsha256 = NULL;
847 if (server->secmech.md5) {
848 crypto_free_shash(server->secmech.md5);
849 server->secmech.md5 = NULL;
852 if (server->secmech.sha512) {
853 crypto_free_shash(server->secmech.sha512);
854 server->secmech.sha512 = NULL;
857 if (server->secmech.hmacmd5) {
858 crypto_free_shash(server->secmech.hmacmd5);
859 server->secmech.hmacmd5 = NULL;
862 if (server->secmech.ccmaesencrypt) {
863 crypto_free_aead(server->secmech.ccmaesencrypt);
864 server->secmech.ccmaesencrypt = NULL;
867 if (server->secmech.ccmaesdecrypt) {
868 crypto_free_aead(server->secmech.ccmaesdecrypt);
869 server->secmech.ccmaesdecrypt = NULL;
872 kfree(server->secmech.sdesccmacaes);
873 server->secmech.sdesccmacaes = NULL;
874 kfree(server->secmech.sdeschmacsha256);
875 server->secmech.sdeschmacsha256 = NULL;
876 kfree(server->secmech.sdeschmacmd5);
877 server->secmech.sdeschmacmd5 = NULL;
878 kfree(server->secmech.sdescmd5);
879 server->secmech.sdescmd5 = NULL;
880 kfree(server->secmech.sdescsha512);
881 server->secmech.sdescsha512 = NULL;