2 * fs/cifs/cifsencrypt.c
4 * Copyright (C) International Business Machines Corp., 2005,2006
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 * Calculate and return the CIFS signature based on the mac key and SMB PDU.
36 * The 16 byte signature must be allocated by the caller. Note we only use the
37 * 1st eight bytes and that the smb header signature field on input contains
38 * the sequence number before this function is called. Also, this function
39 * should be called with the server->srv_mutex held.
41 static int cifs_calc_signature(struct smb_rqst *rqst,
42 struct TCP_Server_Info *server, char *signature)
46 struct kvec *iov = rqst->rq_iov;
47 int n_vec = rqst->rq_nvec;
49 if (iov == NULL || signature == NULL || server == NULL)
52 if (!server->secmech.sdescmd5) {
53 cifs_dbg(VFS, "%s: Can't generate signature\n", __func__);
57 rc = crypto_shash_init(&server->secmech.sdescmd5->shash);
59 cifs_dbg(VFS, "%s: Could not init md5\n", __func__);
63 rc = crypto_shash_update(&server->secmech.sdescmd5->shash,
64 server->session_key.response, server->session_key.len);
66 cifs_dbg(VFS, "%s: Could not update with response\n", __func__);
70 for (i = 0; i < n_vec; i++) {
71 if (iov[i].iov_len == 0)
73 if (iov[i].iov_base == NULL) {
74 cifs_dbg(VFS, "null iovec entry\n");
77 /* The first entry includes a length field (which does not get
78 signed that occupies the first 4 bytes before the header */
80 if (iov[0].iov_len <= 8) /* cmd field at offset 9 */
81 break; /* nothing to sign or corrupt header */
83 crypto_shash_update(&server->secmech.sdescmd5->shash,
84 iov[i].iov_base + 4, iov[i].iov_len - 4);
87 crypto_shash_update(&server->secmech.sdescmd5->shash,
88 iov[i].iov_base, iov[i].iov_len);
91 cifs_dbg(VFS, "%s: Could not update with payload\n",
97 /* now hash over the rq_pages array */
98 for (i = 0; i < rqst->rq_npages; i++) {
101 cifs_rqst_page_to_kvec(rqst, i, &p_iov);
102 crypto_shash_update(&server->secmech.sdescmd5->shash,
103 p_iov.iov_base, p_iov.iov_len);
104 kunmap(rqst->rq_pages[i]);
107 rc = crypto_shash_final(&server->secmech.sdescmd5->shash, signature);
109 cifs_dbg(VFS, "%s: Could not generate md5 hash\n", __func__);
114 /* must be called with server->srv_mutex held */
115 int cifs_sign_rqst(struct smb_rqst *rqst, struct TCP_Server_Info *server,
116 __u32 *pexpected_response_sequence_number)
119 char smb_signature[20];
120 struct smb_hdr *cifs_pdu = (struct smb_hdr *)rqst->rq_iov[0].iov_base;
122 if ((cifs_pdu == NULL) || (server == NULL))
125 if (!(cifs_pdu->Flags2 & SMBFLG2_SECURITY_SIGNATURE) ||
126 server->tcpStatus == CifsNeedNegotiate)
129 if (!server->session_estab) {
130 memcpy(cifs_pdu->Signature.SecuritySignature, "BSRSPYL", 8);
134 cifs_pdu->Signature.Sequence.SequenceNumber =
135 cpu_to_le32(server->sequence_number);
136 cifs_pdu->Signature.Sequence.Reserved = 0;
138 *pexpected_response_sequence_number = ++server->sequence_number;
139 ++server->sequence_number;
141 rc = cifs_calc_signature(rqst, server, smb_signature);
143 memset(cifs_pdu->Signature.SecuritySignature, 0, 8);
145 memcpy(cifs_pdu->Signature.SecuritySignature, smb_signature, 8);
150 int cifs_sign_smbv(struct kvec *iov, int n_vec, struct TCP_Server_Info *server,
151 __u32 *pexpected_response_sequence)
153 struct smb_rqst rqst = { .rq_iov = iov,
156 return cifs_sign_rqst(&rqst, server, pexpected_response_sequence);
159 /* must be called with server->srv_mutex held */
160 int cifs_sign_smb(struct smb_hdr *cifs_pdu, struct TCP_Server_Info *server,
161 __u32 *pexpected_response_sequence_number)
165 iov.iov_base = cifs_pdu;
166 iov.iov_len = be32_to_cpu(cifs_pdu->smb_buf_length) + 4;
168 return cifs_sign_smbv(&iov, 1, server,
169 pexpected_response_sequence_number);
172 int cifs_verify_signature(struct smb_rqst *rqst,
173 struct TCP_Server_Info *server,
174 __u32 expected_sequence_number)
177 char server_response_sig[8];
178 char what_we_think_sig_should_be[20];
179 struct smb_hdr *cifs_pdu = (struct smb_hdr *)rqst->rq_iov[0].iov_base;
181 if (cifs_pdu == NULL || server == NULL)
184 if (!server->session_estab)
187 if (cifs_pdu->Command == SMB_COM_LOCKING_ANDX) {
188 struct smb_com_lock_req *pSMB =
189 (struct smb_com_lock_req *)cifs_pdu;
190 if (pSMB->LockType & LOCKING_ANDX_OPLOCK_RELEASE)
194 /* BB what if signatures are supposed to be on for session but
195 server does not send one? BB */
197 /* Do not need to verify session setups with signature "BSRSPYL " */
198 if (memcmp(cifs_pdu->Signature.SecuritySignature, "BSRSPYL ", 8) == 0)
199 cifs_dbg(FYI, "dummy signature received for smb command 0x%x\n",
202 /* save off the origiginal signature so we can modify the smb and check
203 its signature against what the server sent */
204 memcpy(server_response_sig, cifs_pdu->Signature.SecuritySignature, 8);
206 cifs_pdu->Signature.Sequence.SequenceNumber =
207 cpu_to_le32(expected_sequence_number);
208 cifs_pdu->Signature.Sequence.Reserved = 0;
210 mutex_lock(&server->srv_mutex);
211 rc = cifs_calc_signature(rqst, server, what_we_think_sig_should_be);
212 mutex_unlock(&server->srv_mutex);
217 /* cifs_dump_mem("what we think it should be: ",
218 what_we_think_sig_should_be, 16); */
220 if (memcmp(server_response_sig, what_we_think_sig_should_be, 8))
227 /* first calculate 24 bytes ntlm response and then 16 byte session key */
228 int setup_ntlm_response(struct cifs_ses *ses, const struct nls_table *nls_cp)
231 unsigned int temp_len = CIFS_SESS_KEY_SIZE + CIFS_AUTH_RESP_SIZE;
232 char temp_key[CIFS_SESS_KEY_SIZE];
237 ses->auth_key.response = kmalloc(temp_len, GFP_KERNEL);
238 if (!ses->auth_key.response)
241 ses->auth_key.len = temp_len;
243 rc = SMBNTencrypt(ses->password, ses->server->cryptkey,
244 ses->auth_key.response + CIFS_SESS_KEY_SIZE, nls_cp);
246 cifs_dbg(FYI, "%s Can't generate NTLM response, error: %d\n",
251 rc = E_md4hash(ses->password, temp_key, nls_cp);
253 cifs_dbg(FYI, "%s Can't generate NT hash, error: %d\n",
258 rc = mdfour(ses->auth_key.response, temp_key, CIFS_SESS_KEY_SIZE);
260 cifs_dbg(FYI, "%s Can't generate NTLM session key, error: %d\n",
266 #ifdef CONFIG_CIFS_WEAK_PW_HASH
267 int calc_lanman_hash(const char *password, const char *cryptkey, bool encrypt,
268 char *lnm_session_key)
272 char password_with_pad[CIFS_ENCPWD_SIZE];
274 memset(password_with_pad, 0, CIFS_ENCPWD_SIZE);
276 strncpy(password_with_pad, password, CIFS_ENCPWD_SIZE);
278 if (!encrypt && global_secflags & CIFSSEC_MAY_PLNTXT) {
279 memset(lnm_session_key, 0, CIFS_SESS_KEY_SIZE);
280 memcpy(lnm_session_key, password_with_pad,
285 /* calculate old style session key */
286 /* calling toupper is less broken than repeatedly
287 calling nls_toupper would be since that will never
288 work for UTF8, but neither handles multibyte code pages
289 but the only alternative would be converting to UCS-16 (Unicode)
290 (using a routine something like UniStrupr) then
291 uppercasing and then converting back from Unicode - which
292 would only worth doing it if we knew it were utf8. Basically
293 utf8 and other multibyte codepages each need their own strupper
294 function since a byte at a time will ont work. */
296 for (i = 0; i < CIFS_ENCPWD_SIZE; i++)
297 password_with_pad[i] = toupper(password_with_pad[i]);
299 rc = SMBencrypt(password_with_pad, cryptkey, lnm_session_key);
303 #endif /* CIFS_WEAK_PW_HASH */
305 /* Build a proper attribute value/target info pairs blob.
306 * Fill in netbios and dns domain name and workstation name
307 * and client time (total five av pairs and + one end of fields indicator.
308 * Allocate domain name which gets freed when session struct is deallocated.
311 build_avpair_blob(struct cifs_ses *ses, const struct nls_table *nls_cp)
314 unsigned int size = 2 * sizeof(struct ntlmssp2_name);
315 char *defdmname = "WORKGROUP";
316 unsigned char *blobptr;
317 struct ntlmssp2_name *attrptr;
319 if (!ses->domainName) {
320 ses->domainName = kstrdup(defdmname, GFP_KERNEL);
321 if (!ses->domainName)
325 dlen = strlen(ses->domainName);
328 * The length of this blob is two times the size of a
329 * structure (av pair) which holds name/size
330 * ( for NTLMSSP_AV_NB_DOMAIN_NAME followed by NTLMSSP_AV_EOL ) +
331 * unicode length of a netbios domain name
333 ses->auth_key.len = size + 2 * dlen;
334 ses->auth_key.response = kzalloc(ses->auth_key.len, GFP_KERNEL);
335 if (!ses->auth_key.response) {
336 ses->auth_key.len = 0;
340 blobptr = ses->auth_key.response;
341 attrptr = (struct ntlmssp2_name *) blobptr;
344 * As defined in MS-NTLM 3.3.2, just this av pair field
345 * is sufficient as part of the temp
347 attrptr->type = cpu_to_le16(NTLMSSP_AV_NB_DOMAIN_NAME);
348 attrptr->length = cpu_to_le16(2 * dlen);
349 blobptr = (unsigned char *)attrptr + sizeof(struct ntlmssp2_name);
350 cifs_strtoUTF16((__le16 *)blobptr, ses->domainName, dlen, nls_cp);
355 /* Server has provided av pairs/target info in the type 2 challenge
356 * packet and we have plucked it and stored within smb session.
357 * We parse that blob here to find netbios domain name to be used
358 * as part of ntlmv2 authentication (in Target String), if not already
359 * specified on the command line.
360 * If this function returns without any error but without fetching
361 * domain name, authentication may fail against some server but
362 * may not fail against other (those who are not very particular
363 * about target string i.e. for some, just user name might suffice.
366 find_domain_name(struct cifs_ses *ses, const struct nls_table *nls_cp)
368 unsigned int attrsize;
370 unsigned int onesize = sizeof(struct ntlmssp2_name);
371 unsigned char *blobptr;
372 unsigned char *blobend;
373 struct ntlmssp2_name *attrptr;
375 if (!ses->auth_key.len || !ses->auth_key.response)
378 blobptr = ses->auth_key.response;
379 blobend = blobptr + ses->auth_key.len;
381 while (blobptr + onesize < blobend) {
382 attrptr = (struct ntlmssp2_name *) blobptr;
383 type = le16_to_cpu(attrptr->type);
384 if (type == NTLMSSP_AV_EOL)
386 blobptr += 2; /* advance attr type */
387 attrsize = le16_to_cpu(attrptr->length);
388 blobptr += 2; /* advance attr size */
389 if (blobptr + attrsize > blobend)
391 if (type == NTLMSSP_AV_NB_DOMAIN_NAME) {
394 if (!ses->domainName) {
396 kmalloc(attrsize + 1, GFP_KERNEL);
397 if (!ses->domainName)
399 cifs_from_utf16(ses->domainName,
400 (__le16 *)blobptr, attrsize, attrsize,
405 blobptr += attrsize; /* advance attr value */
411 static int calc_ntlmv2_hash(struct cifs_ses *ses, char *ntlmv2_hash,
412 const struct nls_table *nls_cp)
416 char nt_hash[CIFS_NTHASH_SIZE];
421 if (!ses->server->secmech.sdeschmacmd5) {
422 cifs_dbg(VFS, "%s: can't generate ntlmv2 hash\n", __func__);
426 /* calculate md4 hash of password */
427 E_md4hash(ses->password, nt_hash, nls_cp);
429 rc = crypto_shash_setkey(ses->server->secmech.hmacmd5, nt_hash,
432 cifs_dbg(VFS, "%s: Could not set NT Hash as a key\n", __func__);
436 rc = crypto_shash_init(&ses->server->secmech.sdeschmacmd5->shash);
438 cifs_dbg(VFS, "%s: could not init hmacmd5\n", __func__);
442 /* convert ses->user_name to unicode and uppercase */
443 len = ses->user_name ? strlen(ses->user_name) : 0;
444 user = kmalloc(2 + (len * 2), GFP_KERNEL);
451 len = cifs_strtoUTF16((__le16 *)user, ses->user_name, len, nls_cp);
454 memset(user, '\0', 2);
457 rc = crypto_shash_update(&ses->server->secmech.sdeschmacmd5->shash,
458 (char *)user, 2 * len);
461 cifs_dbg(VFS, "%s: Could not update with user\n", __func__);
465 /* convert ses->domainName to unicode and uppercase */
466 if (ses->domainName) {
467 len = strlen(ses->domainName);
469 domain = kmalloc(2 + (len * 2), GFP_KERNEL);
470 if (domain == NULL) {
474 len = cifs_strtoUTF16((__le16 *)domain, ses->domainName, len,
477 crypto_shash_update(&ses->server->secmech.sdeschmacmd5->shash,
478 (char *)domain, 2 * len);
481 cifs_dbg(VFS, "%s: Could not update with domain\n",
485 } else if (ses->serverName) {
486 len = strlen(ses->serverName);
488 server = kmalloc(2 + (len * 2), GFP_KERNEL);
489 if (server == NULL) {
493 len = cifs_strtoUTF16((__le16 *)server, ses->serverName, len,
496 crypto_shash_update(&ses->server->secmech.sdeschmacmd5->shash,
497 (char *)server, 2 * len);
500 cifs_dbg(VFS, "%s: Could not update with server\n",
506 rc = crypto_shash_final(&ses->server->secmech.sdeschmacmd5->shash,
509 cifs_dbg(VFS, "%s: Could not generate md5 hash\n", __func__);
515 CalcNTLMv2_response(const struct cifs_ses *ses, char *ntlmv2_hash)
518 unsigned int offset = CIFS_SESS_KEY_SIZE + 8;
520 if (!ses->server->secmech.sdeschmacmd5) {
521 cifs_dbg(VFS, "%s: can't generate ntlmv2 hash\n", __func__);
525 rc = crypto_shash_setkey(ses->server->secmech.hmacmd5,
526 ntlmv2_hash, CIFS_HMAC_MD5_HASH_SIZE);
528 cifs_dbg(VFS, "%s: Could not set NTLMV2 Hash as a key\n",
533 rc = crypto_shash_init(&ses->server->secmech.sdeschmacmd5->shash);
535 cifs_dbg(VFS, "%s: could not init hmacmd5\n", __func__);
539 if (ses->server->secType == RawNTLMSSP)
540 memcpy(ses->auth_key.response + offset,
541 ses->ntlmssp->cryptkey, CIFS_SERVER_CHALLENGE_SIZE);
543 memcpy(ses->auth_key.response + offset,
544 ses->server->cryptkey, CIFS_SERVER_CHALLENGE_SIZE);
545 rc = crypto_shash_update(&ses->server->secmech.sdeschmacmd5->shash,
546 ses->auth_key.response + offset, ses->auth_key.len - offset);
548 cifs_dbg(VFS, "%s: Could not update with response\n", __func__);
552 rc = crypto_shash_final(&ses->server->secmech.sdeschmacmd5->shash,
553 ses->auth_key.response + CIFS_SESS_KEY_SIZE);
555 cifs_dbg(VFS, "%s: Could not generate md5 hash\n", __func__);
562 setup_ntlmv2_rsp(struct cifs_ses *ses, const struct nls_table *nls_cp)
567 struct ntlmv2_resp *buf;
568 char ntlmv2_hash[16];
569 unsigned char *tiblob = NULL; /* target info blob */
571 if (ses->server->secType == RawNTLMSSP) {
572 if (!ses->domainName) {
573 rc = find_domain_name(ses, nls_cp);
575 cifs_dbg(VFS, "error %d finding domain name\n",
577 goto setup_ntlmv2_rsp_ret;
581 rc = build_avpair_blob(ses, nls_cp);
583 cifs_dbg(VFS, "error %d building av pair blob\n", rc);
584 goto setup_ntlmv2_rsp_ret;
588 baselen = CIFS_SESS_KEY_SIZE + sizeof(struct ntlmv2_resp);
589 tilen = ses->auth_key.len;
590 tiblob = ses->auth_key.response;
592 ses->auth_key.response = kmalloc(baselen + tilen, GFP_KERNEL);
593 if (!ses->auth_key.response) {
595 ses->auth_key.len = 0;
596 goto setup_ntlmv2_rsp_ret;
598 ses->auth_key.len += baselen;
600 buf = (struct ntlmv2_resp *)
601 (ses->auth_key.response + CIFS_SESS_KEY_SIZE);
602 buf->blob_signature = cpu_to_le32(0x00000101);
604 buf->time = cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME));
605 get_random_bytes(&buf->client_chal, sizeof(buf->client_chal));
608 memcpy(ses->auth_key.response + baselen, tiblob, tilen);
610 /* calculate ntlmv2_hash */
611 rc = calc_ntlmv2_hash(ses, ntlmv2_hash, nls_cp);
613 cifs_dbg(VFS, "could not get v2 hash rc %d\n", rc);
614 goto setup_ntlmv2_rsp_ret;
617 /* calculate first part of the client response (CR1) */
618 rc = CalcNTLMv2_response(ses, ntlmv2_hash);
620 cifs_dbg(VFS, "Could not calculate CR1 rc: %d\n", rc);
621 goto setup_ntlmv2_rsp_ret;
624 /* now calculate the session key for NTLMv2 */
625 rc = crypto_shash_setkey(ses->server->secmech.hmacmd5,
626 ntlmv2_hash, CIFS_HMAC_MD5_HASH_SIZE);
628 cifs_dbg(VFS, "%s: Could not set NTLMV2 Hash as a key\n",
630 goto setup_ntlmv2_rsp_ret;
633 rc = crypto_shash_init(&ses->server->secmech.sdeschmacmd5->shash);
635 cifs_dbg(VFS, "%s: Could not init hmacmd5\n", __func__);
636 goto setup_ntlmv2_rsp_ret;
639 rc = crypto_shash_update(&ses->server->secmech.sdeschmacmd5->shash,
640 ses->auth_key.response + CIFS_SESS_KEY_SIZE,
641 CIFS_HMAC_MD5_HASH_SIZE);
643 cifs_dbg(VFS, "%s: Could not update with response\n", __func__);
644 goto setup_ntlmv2_rsp_ret;
647 rc = crypto_shash_final(&ses->server->secmech.sdeschmacmd5->shash,
648 ses->auth_key.response);
650 cifs_dbg(VFS, "%s: Could not generate md5 hash\n", __func__);
652 setup_ntlmv2_rsp_ret:
659 calc_seckey(struct cifs_ses *ses)
662 struct crypto_blkcipher *tfm_arc4;
663 struct scatterlist sgin, sgout;
664 struct blkcipher_desc desc;
665 unsigned char sec_key[CIFS_SESS_KEY_SIZE]; /* a nonce */
667 get_random_bytes(sec_key, CIFS_SESS_KEY_SIZE);
669 tfm_arc4 = crypto_alloc_blkcipher("ecb(arc4)", 0, CRYPTO_ALG_ASYNC);
670 if (IS_ERR(tfm_arc4)) {
671 rc = PTR_ERR(tfm_arc4);
672 cifs_dbg(VFS, "could not allocate crypto API arc4\n");
678 rc = crypto_blkcipher_setkey(tfm_arc4, ses->auth_key.response,
681 cifs_dbg(VFS, "%s: Could not set response as a key\n",
686 sg_init_one(&sgin, sec_key, CIFS_SESS_KEY_SIZE);
687 sg_init_one(&sgout, ses->ntlmssp->ciphertext, CIFS_CPHTXT_SIZE);
689 rc = crypto_blkcipher_encrypt(&desc, &sgout, &sgin, CIFS_CPHTXT_SIZE);
691 cifs_dbg(VFS, "could not encrypt session key rc: %d\n", rc);
692 crypto_free_blkcipher(tfm_arc4);
696 /* make secondary_key/nonce as session key */
697 memcpy(ses->auth_key.response, sec_key, CIFS_SESS_KEY_SIZE);
698 /* and make len as that of session key only */
699 ses->auth_key.len = CIFS_SESS_KEY_SIZE;
701 crypto_free_blkcipher(tfm_arc4);
707 cifs_crypto_shash_release(struct TCP_Server_Info *server)
709 if (server->secmech.hmacsha256)
710 crypto_free_shash(server->secmech.hmacsha256);
712 if (server->secmech.md5)
713 crypto_free_shash(server->secmech.md5);
715 if (server->secmech.hmacmd5)
716 crypto_free_shash(server->secmech.hmacmd5);
718 kfree(server->secmech.sdeschmacsha256);
720 kfree(server->secmech.sdeschmacmd5);
722 kfree(server->secmech.sdescmd5);
726 cifs_crypto_shash_allocate(struct TCP_Server_Info *server)
731 server->secmech.hmacmd5 = crypto_alloc_shash("hmac(md5)", 0, 0);
732 if (IS_ERR(server->secmech.hmacmd5)) {
733 cifs_dbg(VFS, "could not allocate crypto hmacmd5\n");
734 return PTR_ERR(server->secmech.hmacmd5);
737 server->secmech.md5 = crypto_alloc_shash("md5", 0, 0);
738 if (IS_ERR(server->secmech.md5)) {
739 cifs_dbg(VFS, "could not allocate crypto md5\n");
740 rc = PTR_ERR(server->secmech.md5);
741 goto crypto_allocate_md5_fail;
744 server->secmech.hmacsha256 = crypto_alloc_shash("hmac(sha256)", 0, 0);
745 if (IS_ERR(server->secmech.hmacsha256)) {
746 cifs_dbg(VFS, "could not allocate crypto hmacsha256\n");
747 rc = PTR_ERR(server->secmech.hmacsha256);
748 goto crypto_allocate_hmacsha256_fail;
751 size = sizeof(struct shash_desc) +
752 crypto_shash_descsize(server->secmech.hmacmd5);
753 server->secmech.sdeschmacmd5 = kmalloc(size, GFP_KERNEL);
754 if (!server->secmech.sdeschmacmd5) {
756 goto crypto_allocate_hmacmd5_sdesc_fail;
758 server->secmech.sdeschmacmd5->shash.tfm = server->secmech.hmacmd5;
759 server->secmech.sdeschmacmd5->shash.flags = 0x0;
761 size = sizeof(struct shash_desc) +
762 crypto_shash_descsize(server->secmech.md5);
763 server->secmech.sdescmd5 = kmalloc(size, GFP_KERNEL);
764 if (!server->secmech.sdescmd5) {
766 goto crypto_allocate_md5_sdesc_fail;
768 server->secmech.sdescmd5->shash.tfm = server->secmech.md5;
769 server->secmech.sdescmd5->shash.flags = 0x0;
771 size = sizeof(struct shash_desc) +
772 crypto_shash_descsize(server->secmech.hmacsha256);
773 server->secmech.sdeschmacsha256 = kmalloc(size, GFP_KERNEL);
774 if (!server->secmech.sdeschmacsha256) {
776 goto crypto_allocate_hmacsha256_sdesc_fail;
778 server->secmech.sdeschmacsha256->shash.tfm = server->secmech.hmacsha256;
779 server->secmech.sdeschmacsha256->shash.flags = 0x0;
783 crypto_allocate_hmacsha256_sdesc_fail:
784 kfree(server->secmech.sdescmd5);
786 crypto_allocate_md5_sdesc_fail:
787 kfree(server->secmech.sdeschmacmd5);
789 crypto_allocate_hmacmd5_sdesc_fail:
790 crypto_free_shash(server->secmech.hmacsha256);
792 crypto_allocate_hmacsha256_fail:
793 crypto_free_shash(server->secmech.md5);
795 crypto_allocate_md5_fail:
796 crypto_free_shash(server->secmech.hmacmd5);