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,
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 crypto_shash_update(shash, kaddr, len);
88 kunmap(rqst->rq_pages[i]);
91 rc = crypto_shash_final(shash, signature);
93 cifs_dbg(VFS, "%s: Could not generate hash\n", __func__);
99 * Calculate and return the CIFS signature based on the mac key and SMB PDU.
100 * The 16 byte signature must be allocated by the caller. Note we only use the
101 * 1st eight bytes and that the smb header signature field on input contains
102 * the sequence number before this function is called. Also, this function
103 * should be called with the server->srv_mutex held.
105 static int cifs_calc_signature(struct smb_rqst *rqst,
106 struct TCP_Server_Info *server, char *signature)
110 if (!rqst->rq_iov || !signature || !server)
113 rc = cifs_alloc_hash("md5", &server->secmech.md5,
114 &server->secmech.sdescmd5);
118 rc = crypto_shash_init(&server->secmech.sdescmd5->shash);
120 cifs_dbg(VFS, "%s: Could not init md5\n", __func__);
124 rc = crypto_shash_update(&server->secmech.sdescmd5->shash,
125 server->session_key.response, server->session_key.len);
127 cifs_dbg(VFS, "%s: Could not update with response\n", __func__);
131 return __cifs_calc_signature(rqst, server, signature,
132 &server->secmech.sdescmd5->shash);
135 /* must be called with server->srv_mutex held */
136 int cifs_sign_rqst(struct smb_rqst *rqst, struct TCP_Server_Info *server,
137 __u32 *pexpected_response_sequence_number)
140 char smb_signature[20];
141 struct smb_hdr *cifs_pdu = (struct smb_hdr *)rqst->rq_iov[0].iov_base;
143 if (rqst->rq_iov[0].iov_len != 4 ||
144 rqst->rq_iov[0].iov_base + 4 != rqst->rq_iov[1].iov_base)
147 if ((cifs_pdu == NULL) || (server == NULL))
150 if (!(cifs_pdu->Flags2 & SMBFLG2_SECURITY_SIGNATURE) ||
151 server->tcpStatus == CifsNeedNegotiate)
154 if (!server->session_estab) {
155 memcpy(cifs_pdu->Signature.SecuritySignature, "BSRSPYL", 8);
159 cifs_pdu->Signature.Sequence.SequenceNumber =
160 cpu_to_le32(server->sequence_number);
161 cifs_pdu->Signature.Sequence.Reserved = 0;
163 *pexpected_response_sequence_number = ++server->sequence_number;
164 ++server->sequence_number;
166 rc = cifs_calc_signature(rqst, server, smb_signature);
168 memset(cifs_pdu->Signature.SecuritySignature, 0, 8);
170 memcpy(cifs_pdu->Signature.SecuritySignature, smb_signature, 8);
175 int cifs_sign_smbv(struct kvec *iov, int n_vec, struct TCP_Server_Info *server,
176 __u32 *pexpected_response_sequence)
178 struct smb_rqst rqst = { .rq_iov = iov,
181 return cifs_sign_rqst(&rqst, server, pexpected_response_sequence);
184 /* must be called with server->srv_mutex held */
185 int cifs_sign_smb(struct smb_hdr *cifs_pdu, struct TCP_Server_Info *server,
186 __u32 *pexpected_response_sequence_number)
190 iov[0].iov_base = cifs_pdu;
192 iov[1].iov_base = (char *)cifs_pdu + 4;
193 iov[1].iov_len = be32_to_cpu(cifs_pdu->smb_buf_length);
195 return cifs_sign_smbv(iov, 2, server,
196 pexpected_response_sequence_number);
199 int cifs_verify_signature(struct smb_rqst *rqst,
200 struct TCP_Server_Info *server,
201 __u32 expected_sequence_number)
204 char server_response_sig[8];
205 char what_we_think_sig_should_be[20];
206 struct smb_hdr *cifs_pdu = (struct smb_hdr *)rqst->rq_iov[0].iov_base;
208 if (rqst->rq_iov[0].iov_len != 4 ||
209 rqst->rq_iov[0].iov_base + 4 != rqst->rq_iov[1].iov_base)
212 if (cifs_pdu == NULL || server == NULL)
215 if (!server->session_estab)
218 if (cifs_pdu->Command == SMB_COM_LOCKING_ANDX) {
219 struct smb_com_lock_req *pSMB =
220 (struct smb_com_lock_req *)cifs_pdu;
221 if (pSMB->LockType & LOCKING_ANDX_OPLOCK_RELEASE)
225 /* BB what if signatures are supposed to be on for session but
226 server does not send one? BB */
228 /* Do not need to verify session setups with signature "BSRSPYL " */
229 if (memcmp(cifs_pdu->Signature.SecuritySignature, "BSRSPYL ", 8) == 0)
230 cifs_dbg(FYI, "dummy signature received for smb command 0x%x\n",
233 /* save off the origiginal signature so we can modify the smb and check
234 its signature against what the server sent */
235 memcpy(server_response_sig, cifs_pdu->Signature.SecuritySignature, 8);
237 cifs_pdu->Signature.Sequence.SequenceNumber =
238 cpu_to_le32(expected_sequence_number);
239 cifs_pdu->Signature.Sequence.Reserved = 0;
241 mutex_lock(&server->srv_mutex);
242 rc = cifs_calc_signature(rqst, server, what_we_think_sig_should_be);
243 mutex_unlock(&server->srv_mutex);
248 /* cifs_dump_mem("what we think it should be: ",
249 what_we_think_sig_should_be, 16); */
251 if (memcmp(server_response_sig, what_we_think_sig_should_be, 8))
258 /* first calculate 24 bytes ntlm response and then 16 byte session key */
259 int setup_ntlm_response(struct cifs_ses *ses, const struct nls_table *nls_cp)
262 unsigned int temp_len = CIFS_SESS_KEY_SIZE + CIFS_AUTH_RESP_SIZE;
263 char temp_key[CIFS_SESS_KEY_SIZE];
268 ses->auth_key.response = kmalloc(temp_len, GFP_KERNEL);
269 if (!ses->auth_key.response)
272 ses->auth_key.len = temp_len;
274 rc = SMBNTencrypt(ses->password, ses->server->cryptkey,
275 ses->auth_key.response + CIFS_SESS_KEY_SIZE, nls_cp);
277 cifs_dbg(FYI, "%s Can't generate NTLM response, error: %d\n",
282 rc = E_md4hash(ses->password, temp_key, nls_cp);
284 cifs_dbg(FYI, "%s Can't generate NT hash, error: %d\n",
289 rc = mdfour(ses->auth_key.response, temp_key, CIFS_SESS_KEY_SIZE);
291 cifs_dbg(FYI, "%s Can't generate NTLM session key, error: %d\n",
297 #ifdef CONFIG_CIFS_WEAK_PW_HASH
298 int calc_lanman_hash(const char *password, const char *cryptkey, bool encrypt,
299 char *lnm_session_key)
303 char password_with_pad[CIFS_ENCPWD_SIZE] = {0};
306 strncpy(password_with_pad, password, CIFS_ENCPWD_SIZE);
308 if (!encrypt && global_secflags & CIFSSEC_MAY_PLNTXT) {
309 memcpy(lnm_session_key, password_with_pad,
314 /* calculate old style session key */
315 /* calling toupper is less broken than repeatedly
316 calling nls_toupper would be since that will never
317 work for UTF8, but neither handles multibyte code pages
318 but the only alternative would be converting to UCS-16 (Unicode)
319 (using a routine something like UniStrupr) then
320 uppercasing and then converting back from Unicode - which
321 would only worth doing it if we knew it were utf8. Basically
322 utf8 and other multibyte codepages each need their own strupper
323 function since a byte at a time will ont work. */
325 for (i = 0; i < CIFS_ENCPWD_SIZE; i++)
326 password_with_pad[i] = toupper(password_with_pad[i]);
328 rc = SMBencrypt(password_with_pad, cryptkey, lnm_session_key);
332 #endif /* CIFS_WEAK_PW_HASH */
334 /* Build a proper attribute value/target info pairs blob.
335 * Fill in netbios and dns domain name and workstation name
336 * and client time (total five av pairs and + one end of fields indicator.
337 * Allocate domain name which gets freed when session struct is deallocated.
340 build_avpair_blob(struct cifs_ses *ses, const struct nls_table *nls_cp)
343 unsigned int size = 2 * sizeof(struct ntlmssp2_name);
344 char *defdmname = "WORKGROUP";
345 unsigned char *blobptr;
346 struct ntlmssp2_name *attrptr;
348 if (!ses->domainName) {
349 ses->domainName = kstrdup(defdmname, GFP_KERNEL);
350 if (!ses->domainName)
354 dlen = strlen(ses->domainName);
357 * The length of this blob is two times the size of a
358 * structure (av pair) which holds name/size
359 * ( for NTLMSSP_AV_NB_DOMAIN_NAME followed by NTLMSSP_AV_EOL ) +
360 * unicode length of a netbios domain name
362 ses->auth_key.len = size + 2 * dlen;
363 ses->auth_key.response = kzalloc(ses->auth_key.len, GFP_KERNEL);
364 if (!ses->auth_key.response) {
365 ses->auth_key.len = 0;
369 blobptr = ses->auth_key.response;
370 attrptr = (struct ntlmssp2_name *) blobptr;
373 * As defined in MS-NTLM 3.3.2, just this av pair field
374 * is sufficient as part of the temp
376 attrptr->type = cpu_to_le16(NTLMSSP_AV_NB_DOMAIN_NAME);
377 attrptr->length = cpu_to_le16(2 * dlen);
378 blobptr = (unsigned char *)attrptr + sizeof(struct ntlmssp2_name);
379 cifs_strtoUTF16((__le16 *)blobptr, ses->domainName, dlen, nls_cp);
384 /* Server has provided av pairs/target info in the type 2 challenge
385 * packet and we have plucked it and stored within smb session.
386 * We parse that blob here to find netbios domain name to be used
387 * as part of ntlmv2 authentication (in Target String), if not already
388 * specified on the command line.
389 * If this function returns without any error but without fetching
390 * domain name, authentication may fail against some server but
391 * may not fail against other (those who are not very particular
392 * about target string i.e. for some, just user name might suffice.
395 find_domain_name(struct cifs_ses *ses, const struct nls_table *nls_cp)
397 unsigned int attrsize;
399 unsigned int onesize = sizeof(struct ntlmssp2_name);
400 unsigned char *blobptr;
401 unsigned char *blobend;
402 struct ntlmssp2_name *attrptr;
404 if (!ses->auth_key.len || !ses->auth_key.response)
407 blobptr = ses->auth_key.response;
408 blobend = blobptr + ses->auth_key.len;
410 while (blobptr + onesize < blobend) {
411 attrptr = (struct ntlmssp2_name *) blobptr;
412 type = le16_to_cpu(attrptr->type);
413 if (type == NTLMSSP_AV_EOL)
415 blobptr += 2; /* advance attr type */
416 attrsize = le16_to_cpu(attrptr->length);
417 blobptr += 2; /* advance attr size */
418 if (blobptr + attrsize > blobend)
420 if (type == NTLMSSP_AV_NB_DOMAIN_NAME) {
421 if (!attrsize || attrsize >= CIFS_MAX_DOMAINNAME_LEN)
423 if (!ses->domainName) {
425 kmalloc(attrsize + 1, GFP_KERNEL);
426 if (!ses->domainName)
428 cifs_from_utf16(ses->domainName,
429 (__le16 *)blobptr, attrsize, attrsize,
430 nls_cp, NO_MAP_UNI_RSVD);
434 blobptr += attrsize; /* advance attr value */
440 /* Server has provided av pairs/target info in the type 2 challenge
441 * packet and we have plucked it and stored within smb session.
442 * We parse that blob here to find the server given timestamp
443 * as part of ntlmv2 authentication (or local current time as
444 * default in case of failure)
447 find_timestamp(struct cifs_ses *ses)
449 unsigned int attrsize;
451 unsigned int onesize = sizeof(struct ntlmssp2_name);
452 unsigned char *blobptr;
453 unsigned char *blobend;
454 struct ntlmssp2_name *attrptr;
457 if (!ses->auth_key.len || !ses->auth_key.response)
460 blobptr = ses->auth_key.response;
461 blobend = blobptr + ses->auth_key.len;
463 while (blobptr + onesize < blobend) {
464 attrptr = (struct ntlmssp2_name *) blobptr;
465 type = le16_to_cpu(attrptr->type);
466 if (type == NTLMSSP_AV_EOL)
468 blobptr += 2; /* advance attr type */
469 attrsize = le16_to_cpu(attrptr->length);
470 blobptr += 2; /* advance attr size */
471 if (blobptr + attrsize > blobend)
473 if (type == NTLMSSP_AV_TIMESTAMP) {
474 if (attrsize == sizeof(u64))
475 return *((__le64 *)blobptr);
477 blobptr += attrsize; /* advance attr value */
480 ktime_get_real_ts(&ts);
481 return cpu_to_le64(cifs_UnixTimeToNT(ts));
484 static int calc_ntlmv2_hash(struct cifs_ses *ses, char *ntlmv2_hash,
485 const struct nls_table *nls_cp)
489 char nt_hash[CIFS_NTHASH_SIZE];
494 if (!ses->server->secmech.sdeschmacmd5) {
495 cifs_dbg(VFS, "%s: can't generate ntlmv2 hash\n", __func__);
499 /* calculate md4 hash of password */
500 E_md4hash(ses->password, nt_hash, nls_cp);
502 rc = crypto_shash_setkey(ses->server->secmech.hmacmd5, nt_hash,
505 cifs_dbg(VFS, "%s: Could not set NT Hash as a key\n", __func__);
509 rc = crypto_shash_init(&ses->server->secmech.sdeschmacmd5->shash);
511 cifs_dbg(VFS, "%s: could not init hmacmd5\n", __func__);
515 /* convert ses->user_name to unicode */
516 len = ses->user_name ? strlen(ses->user_name) : 0;
517 user = kmalloc(2 + (len * 2), GFP_KERNEL);
524 len = cifs_strtoUTF16(user, ses->user_name, len, nls_cp);
527 memset(user, '\0', 2);
530 rc = crypto_shash_update(&ses->server->secmech.sdeschmacmd5->shash,
531 (char *)user, 2 * len);
534 cifs_dbg(VFS, "%s: Could not update with user\n", __func__);
538 /* convert ses->domainName to unicode and uppercase */
539 if (ses->domainName) {
540 len = strlen(ses->domainName);
542 domain = kmalloc(2 + (len * 2), GFP_KERNEL);
543 if (domain == NULL) {
547 len = cifs_strtoUTF16((__le16 *)domain, ses->domainName, len,
550 crypto_shash_update(&ses->server->secmech.sdeschmacmd5->shash,
551 (char *)domain, 2 * len);
554 cifs_dbg(VFS, "%s: Could not update with domain\n",
559 /* We use ses->serverName if no domain name available */
560 len = strlen(ses->serverName);
562 server = kmalloc(2 + (len * 2), GFP_KERNEL);
563 if (server == NULL) {
567 len = cifs_strtoUTF16((__le16 *)server, ses->serverName, len,
570 crypto_shash_update(&ses->server->secmech.sdeschmacmd5->shash,
571 (char *)server, 2 * len);
574 cifs_dbg(VFS, "%s: Could not update with server\n",
580 rc = crypto_shash_final(&ses->server->secmech.sdeschmacmd5->shash,
583 cifs_dbg(VFS, "%s: Could not generate md5 hash\n", __func__);
589 CalcNTLMv2_response(const struct cifs_ses *ses, char *ntlmv2_hash)
592 struct ntlmv2_resp *ntlmv2 = (struct ntlmv2_resp *)
593 (ses->auth_key.response + CIFS_SESS_KEY_SIZE);
594 unsigned int hash_len;
596 /* The MD5 hash starts at challenge_key.key */
597 hash_len = ses->auth_key.len - (CIFS_SESS_KEY_SIZE +
598 offsetof(struct ntlmv2_resp, challenge.key[0]));
600 if (!ses->server->secmech.sdeschmacmd5) {
601 cifs_dbg(VFS, "%s: can't generate ntlmv2 hash\n", __func__);
605 rc = crypto_shash_setkey(ses->server->secmech.hmacmd5,
606 ntlmv2_hash, CIFS_HMAC_MD5_HASH_SIZE);
608 cifs_dbg(VFS, "%s: Could not set NTLMV2 Hash as a key\n",
613 rc = crypto_shash_init(&ses->server->secmech.sdeschmacmd5->shash);
615 cifs_dbg(VFS, "%s: could not init hmacmd5\n", __func__);
619 if (ses->server->negflavor == CIFS_NEGFLAVOR_EXTENDED)
620 memcpy(ntlmv2->challenge.key,
621 ses->ntlmssp->cryptkey, CIFS_SERVER_CHALLENGE_SIZE);
623 memcpy(ntlmv2->challenge.key,
624 ses->server->cryptkey, CIFS_SERVER_CHALLENGE_SIZE);
625 rc = crypto_shash_update(&ses->server->secmech.sdeschmacmd5->shash,
626 ntlmv2->challenge.key, hash_len);
628 cifs_dbg(VFS, "%s: Could not update with response\n", __func__);
632 /* Note that the MD5 digest over writes anon.challenge_key.key */
633 rc = crypto_shash_final(&ses->server->secmech.sdeschmacmd5->shash,
634 ntlmv2->ntlmv2_hash);
636 cifs_dbg(VFS, "%s: Could not generate md5 hash\n", __func__);
642 setup_ntlmv2_rsp(struct cifs_ses *ses, const struct nls_table *nls_cp)
647 struct ntlmv2_resp *ntlmv2;
648 char ntlmv2_hash[16];
649 unsigned char *tiblob = NULL; /* target info blob */
650 __le64 rsp_timestamp;
652 if (ses->server->negflavor == CIFS_NEGFLAVOR_EXTENDED) {
653 if (!ses->domainName) {
654 if (ses->domainAuto) {
655 rc = find_domain_name(ses, nls_cp);
657 cifs_dbg(VFS, "error %d finding domain name\n",
659 goto setup_ntlmv2_rsp_ret;
662 ses->domainName = kstrdup("", GFP_KERNEL);
666 rc = build_avpair_blob(ses, nls_cp);
668 cifs_dbg(VFS, "error %d building av pair blob\n", rc);
669 goto setup_ntlmv2_rsp_ret;
673 /* Must be within 5 minutes of the server (or in range +/-2h
674 * in case of Mac OS X), so simply carry over server timestamp
675 * (as Windows 7 does)
677 rsp_timestamp = find_timestamp(ses);
679 baselen = CIFS_SESS_KEY_SIZE + sizeof(struct ntlmv2_resp);
680 tilen = ses->auth_key.len;
681 tiblob = ses->auth_key.response;
683 ses->auth_key.response = kmalloc(baselen + tilen, GFP_KERNEL);
684 if (!ses->auth_key.response) {
686 ses->auth_key.len = 0;
687 goto setup_ntlmv2_rsp_ret;
689 ses->auth_key.len += baselen;
691 ntlmv2 = (struct ntlmv2_resp *)
692 (ses->auth_key.response + CIFS_SESS_KEY_SIZE);
693 ntlmv2->blob_signature = cpu_to_le32(0x00000101);
694 ntlmv2->reserved = 0;
695 ntlmv2->time = rsp_timestamp;
697 get_random_bytes(&ntlmv2->client_chal, sizeof(ntlmv2->client_chal));
698 ntlmv2->reserved2 = 0;
700 memcpy(ses->auth_key.response + baselen, tiblob, tilen);
702 mutex_lock(&ses->server->srv_mutex);
704 rc = cifs_alloc_hash("hmac(md5)",
705 &ses->server->secmech.hmacmd5,
706 &ses->server->secmech.sdeschmacmd5);
711 /* calculate ntlmv2_hash */
712 rc = calc_ntlmv2_hash(ses, ntlmv2_hash, nls_cp);
714 cifs_dbg(VFS, "could not get v2 hash rc %d\n", rc);
718 /* calculate first part of the client response (CR1) */
719 rc = CalcNTLMv2_response(ses, ntlmv2_hash);
721 cifs_dbg(VFS, "Could not calculate CR1 rc: %d\n", rc);
725 /* now calculate the session key for NTLMv2 */
726 rc = crypto_shash_setkey(ses->server->secmech.hmacmd5,
727 ntlmv2_hash, CIFS_HMAC_MD5_HASH_SIZE);
729 cifs_dbg(VFS, "%s: Could not set NTLMV2 Hash as a key\n",
734 rc = crypto_shash_init(&ses->server->secmech.sdeschmacmd5->shash);
736 cifs_dbg(VFS, "%s: Could not init hmacmd5\n", __func__);
740 rc = crypto_shash_update(&ses->server->secmech.sdeschmacmd5->shash,
742 CIFS_HMAC_MD5_HASH_SIZE);
744 cifs_dbg(VFS, "%s: Could not update with response\n", __func__);
748 rc = crypto_shash_final(&ses->server->secmech.sdeschmacmd5->shash,
749 ses->auth_key.response);
751 cifs_dbg(VFS, "%s: Could not generate md5 hash\n", __func__);
754 mutex_unlock(&ses->server->srv_mutex);
755 setup_ntlmv2_rsp_ret:
762 calc_seckey(struct cifs_ses *ses)
765 struct crypto_skcipher *tfm_arc4;
766 struct scatterlist sgin, sgout;
767 struct skcipher_request *req;
768 unsigned char *sec_key;
770 sec_key = kmalloc(CIFS_SESS_KEY_SIZE, GFP_KERNEL);
774 get_random_bytes(sec_key, CIFS_SESS_KEY_SIZE);
776 tfm_arc4 = crypto_alloc_skcipher("ecb(arc4)", 0, CRYPTO_ALG_ASYNC);
777 if (IS_ERR(tfm_arc4)) {
778 rc = PTR_ERR(tfm_arc4);
779 cifs_dbg(VFS, "could not allocate crypto API arc4\n");
783 rc = crypto_skcipher_setkey(tfm_arc4, ses->auth_key.response,
786 cifs_dbg(VFS, "%s: Could not set response as a key\n",
788 goto out_free_cipher;
791 req = skcipher_request_alloc(tfm_arc4, GFP_KERNEL);
794 cifs_dbg(VFS, "could not allocate crypto API arc4 request\n");
795 goto out_free_cipher;
798 sg_init_one(&sgin, sec_key, CIFS_SESS_KEY_SIZE);
799 sg_init_one(&sgout, ses->ntlmssp->ciphertext, CIFS_CPHTXT_SIZE);
801 skcipher_request_set_callback(req, 0, NULL, NULL);
802 skcipher_request_set_crypt(req, &sgin, &sgout, CIFS_CPHTXT_SIZE, NULL);
804 rc = crypto_skcipher_encrypt(req);
805 skcipher_request_free(req);
807 cifs_dbg(VFS, "could not encrypt session key rc: %d\n", rc);
808 goto out_free_cipher;
811 /* make secondary_key/nonce as session key */
812 memcpy(ses->auth_key.response, sec_key, CIFS_SESS_KEY_SIZE);
813 /* and make len as that of session key only */
814 ses->auth_key.len = CIFS_SESS_KEY_SIZE;
817 crypto_free_skcipher(tfm_arc4);
824 cifs_crypto_secmech_release(struct TCP_Server_Info *server)
826 if (server->secmech.cmacaes) {
827 crypto_free_shash(server->secmech.cmacaes);
828 server->secmech.cmacaes = NULL;
831 if (server->secmech.hmacsha256) {
832 crypto_free_shash(server->secmech.hmacsha256);
833 server->secmech.hmacsha256 = NULL;
836 if (server->secmech.md5) {
837 crypto_free_shash(server->secmech.md5);
838 server->secmech.md5 = NULL;
841 if (server->secmech.sha512) {
842 crypto_free_shash(server->secmech.sha512);
843 server->secmech.sha512 = NULL;
846 if (server->secmech.hmacmd5) {
847 crypto_free_shash(server->secmech.hmacmd5);
848 server->secmech.hmacmd5 = NULL;
851 if (server->secmech.ccmaesencrypt) {
852 crypto_free_aead(server->secmech.ccmaesencrypt);
853 server->secmech.ccmaesencrypt = NULL;
856 if (server->secmech.ccmaesdecrypt) {
857 crypto_free_aead(server->secmech.ccmaesdecrypt);
858 server->secmech.ccmaesdecrypt = NULL;
861 kfree(server->secmech.sdesccmacaes);
862 server->secmech.sdesccmacaes = NULL;
863 kfree(server->secmech.sdeschmacsha256);
864 server->secmech.sdeschmacsha256 = NULL;
865 kfree(server->secmech.sdeschmacmd5);
866 server->secmech.sdeschmacmd5 = NULL;
867 kfree(server->secmech.sdescmd5);
868 server->secmech.sdescmd5 = NULL;
869 kfree(server->secmech.sdescsha512);
870 server->secmech.sdescsha512 = NULL;