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"
28 #include "cifs_unicode.h"
29 #include "cifsproto.h"
31 #include <linux/ctype.h>
32 #include <linux/random.h>
34 /* Calculate and return the CIFS signature based on the mac key and SMB PDU */
35 /* the 16 byte signature must be allocated by the caller */
36 /* Note we only use the 1st eight bytes */
37 /* Note that the smb header signature field on input contains the
38 sequence number before this function is called */
40 extern void mdfour(unsigned char *out, unsigned char *in, int n);
41 extern void E_md4hash(const unsigned char *passwd, unsigned char *p16);
42 extern void SMBencrypt(unsigned char *passwd, const unsigned char *c8,
45 static int cifs_calculate_signature(const struct smb_hdr *cifs_pdu,
46 struct TCP_Server_Info *server, char *signature)
50 if (cifs_pdu == NULL || signature == NULL || server == NULL)
53 if (!server->secmech.sdescmd5) {
54 cERROR(1, "%s: Can't generate signature\n", __func__);
58 rc = crypto_shash_init(&server->secmech.sdescmd5->shash);
60 cERROR(1, "%s: Oould not init md5\n", __func__);
64 crypto_shash_update(&server->secmech.sdescmd5->shash,
65 server->session_key.response, server->session_key.len);
67 crypto_shash_update(&server->secmech.sdescmd5->shash,
68 cifs_pdu->Protocol, cifs_pdu->smb_buf_length);
70 rc = crypto_shash_final(&server->secmech.sdescmd5->shash, signature);
75 int cifs_sign_smb(struct smb_hdr *cifs_pdu, struct TCP_Server_Info *server,
76 __u32 *pexpected_response_sequence_number)
79 char smb_signature[20];
81 if ((cifs_pdu == NULL) || (server == NULL))
84 if ((cifs_pdu->Flags2 & SMBFLG2_SECURITY_SIGNATURE) == 0)
87 spin_lock(&GlobalMid_Lock);
88 cifs_pdu->Signature.Sequence.SequenceNumber =
89 cpu_to_le32(server->sequence_number);
90 cifs_pdu->Signature.Sequence.Reserved = 0;
92 *pexpected_response_sequence_number = server->sequence_number++;
93 server->sequence_number++;
94 spin_unlock(&GlobalMid_Lock);
96 rc = cifs_calculate_signature(cifs_pdu, server, smb_signature);
98 memset(cifs_pdu->Signature.SecuritySignature, 0, 8);
100 memcpy(cifs_pdu->Signature.SecuritySignature, smb_signature, 8);
105 static int cifs_calc_signature2(const struct kvec *iov, int n_vec,
106 struct TCP_Server_Info *server, char *signature)
111 if (iov == NULL || signature == NULL || server == NULL)
114 if (!server->secmech.sdescmd5) {
115 cERROR(1, "%s: Can't generate signature\n", __func__);
119 rc = crypto_shash_init(&server->secmech.sdescmd5->shash);
121 cERROR(1, "%s: Oould not init md5\n", __func__);
125 crypto_shash_update(&server->secmech.sdescmd5->shash,
126 server->session_key.response, server->session_key.len);
128 for (i = 0; i < n_vec; i++) {
129 if (iov[i].iov_len == 0)
131 if (iov[i].iov_base == NULL) {
132 cERROR(1, "null iovec entry");
135 /* The first entry includes a length field (which does not get
136 signed that occupies the first 4 bytes before the header */
138 if (iov[0].iov_len <= 8) /* cmd field at offset 9 */
139 break; /* nothing to sign or corrupt header */
140 crypto_shash_update(&server->secmech.sdescmd5->shash,
141 iov[i].iov_base + 4, iov[i].iov_len - 4);
143 crypto_shash_update(&server->secmech.sdescmd5->shash,
144 iov[i].iov_base, iov[i].iov_len);
147 rc = crypto_shash_final(&server->secmech.sdescmd5->shash, signature);
152 int cifs_sign_smb2(struct kvec *iov, int n_vec, struct TCP_Server_Info *server,
153 __u32 *pexpected_response_sequence_number)
156 char smb_signature[20];
157 struct smb_hdr *cifs_pdu = iov[0].iov_base;
159 if ((cifs_pdu == NULL) || (server == NULL))
162 if ((cifs_pdu->Flags2 & SMBFLG2_SECURITY_SIGNATURE) == 0)
165 spin_lock(&GlobalMid_Lock);
166 cifs_pdu->Signature.Sequence.SequenceNumber =
167 cpu_to_le32(server->sequence_number);
168 cifs_pdu->Signature.Sequence.Reserved = 0;
170 *pexpected_response_sequence_number = server->sequence_number++;
171 server->sequence_number++;
172 spin_unlock(&GlobalMid_Lock);
174 rc = cifs_calc_signature2(iov, n_vec, server, smb_signature);
176 memset(cifs_pdu->Signature.SecuritySignature, 0, 8);
178 memcpy(cifs_pdu->Signature.SecuritySignature, smb_signature, 8);
183 int cifs_verify_signature(struct smb_hdr *cifs_pdu,
184 struct TCP_Server_Info *server,
185 __u32 expected_sequence_number)
188 char server_response_sig[8];
189 char what_we_think_sig_should_be[20];
191 if (cifs_pdu == NULL || server == NULL)
194 if (cifs_pdu->Command == SMB_COM_NEGOTIATE)
197 if (cifs_pdu->Command == SMB_COM_LOCKING_ANDX) {
198 struct smb_com_lock_req *pSMB =
199 (struct smb_com_lock_req *)cifs_pdu;
200 if (pSMB->LockType & LOCKING_ANDX_OPLOCK_RELEASE)
204 /* BB what if signatures are supposed to be on for session but
205 server does not send one? BB */
207 /* Do not need to verify session setups with signature "BSRSPYL " */
208 if (memcmp(cifs_pdu->Signature.SecuritySignature, "BSRSPYL ", 8) == 0)
209 cFYI(1, "dummy signature received for smb command 0x%x",
212 /* save off the origiginal signature so we can modify the smb and check
213 its signature against what the server sent */
214 memcpy(server_response_sig, cifs_pdu->Signature.SecuritySignature, 8);
216 cifs_pdu->Signature.Sequence.SequenceNumber =
217 cpu_to_le32(expected_sequence_number);
218 cifs_pdu->Signature.Sequence.Reserved = 0;
220 rc = cifs_calculate_signature(cifs_pdu, server,
221 what_we_think_sig_should_be);
226 /* cifs_dump_mem("what we think it should be: ",
227 what_we_think_sig_should_be, 16); */
229 if (memcmp(server_response_sig, what_we_think_sig_should_be, 8))
236 /* first calculate 24 bytes ntlm response and then 16 byte session key */
237 int setup_ntlm_response(struct cifsSesInfo *ses)
239 unsigned int temp_len = CIFS_SESS_KEY_SIZE + CIFS_AUTH_RESP_SIZE;
240 char temp_key[CIFS_SESS_KEY_SIZE];
245 ses->auth_key.response = kmalloc(temp_len, GFP_KERNEL);
246 if (!ses->auth_key.response) {
247 cERROR(1, "NTLM can't allocate (%u bytes) memory", temp_len);
250 ses->auth_key.len = temp_len;
252 SMBNTencrypt(ses->password, ses->cryptKey,
253 ses->auth_key.response + CIFS_SESS_KEY_SIZE);
255 E_md4hash(ses->password, temp_key);
256 mdfour(ses->auth_key.response, temp_key, CIFS_SESS_KEY_SIZE);
261 #ifdef CONFIG_CIFS_WEAK_PW_HASH
262 void calc_lanman_hash(const char *password, const char *cryptkey, bool encrypt,
263 char *lnm_session_key)
266 char password_with_pad[CIFS_ENCPWD_SIZE];
268 memset(password_with_pad, 0, CIFS_ENCPWD_SIZE);
270 strncpy(password_with_pad, password, CIFS_ENCPWD_SIZE);
272 if (!encrypt && global_secflags & CIFSSEC_MAY_PLNTXT) {
273 memset(lnm_session_key, 0, CIFS_SESS_KEY_SIZE);
274 memcpy(lnm_session_key, password_with_pad,
279 /* calculate old style session key */
280 /* calling toupper is less broken than repeatedly
281 calling nls_toupper would be since that will never
282 work for UTF8, but neither handles multibyte code pages
283 but the only alternative would be converting to UCS-16 (Unicode)
284 (using a routine something like UniStrupr) then
285 uppercasing and then converting back from Unicode - which
286 would only worth doing it if we knew it were utf8. Basically
287 utf8 and other multibyte codepages each need their own strupper
288 function since a byte at a time will ont work. */
290 for (i = 0; i < CIFS_ENCPWD_SIZE; i++)
291 password_with_pad[i] = toupper(password_with_pad[i]);
293 SMBencrypt(password_with_pad, cryptkey, lnm_session_key);
295 /* clear password before we return/free memory */
296 memset(password_with_pad, 0, CIFS_ENCPWD_SIZE);
298 #endif /* CIFS_WEAK_PW_HASH */
300 /* Build a proper attribute value/target info pairs blob.
301 * Fill in netbios and dns domain name and workstation name
302 * and client time (total five av pairs and + one end of fields indicator.
303 * Allocate domain name which gets freed when session struct is deallocated.
306 build_avpair_blob(struct cifsSesInfo *ses, const struct nls_table *nls_cp)
310 unsigned int size = 6 * sizeof(struct ntlmssp2_name);
312 char *defdmname = "WORKGROUP";
313 unsigned char *blobptr;
314 struct ntlmssp2_name *attrptr;
316 if (!ses->domainName) {
317 ses->domainName = kstrdup(defdmname, GFP_KERNEL);
318 if (!ses->domainName)
322 dlen = strlen(ses->domainName);
323 wlen = strlen(ses->server->hostname);
325 /* The length of this blob is a size which is
326 * six times the size of a structure which holds name/size +
327 * two times the unicode length of a domain name +
328 * two times the unicode length of a server name +
329 * size of a timestamp (which is 8 bytes).
331 ses->tilen = size + 2 * (2 * dlen) + 2 * (2 * wlen) + 8;
332 ses->tiblob = kzalloc(ses->tilen, GFP_KERNEL);
335 cERROR(1, "Challenge target info allocation failure");
339 blobptr = ses->tiblob;
340 attrptr = (struct ntlmssp2_name *) blobptr;
342 attrptr->type = cpu_to_le16(NTLMSSP_AV_NB_DOMAIN_NAME);
343 attrptr->length = cpu_to_le16(2 * dlen);
344 blobptr = (unsigned char *)attrptr + sizeof(struct ntlmssp2_name);
345 cifs_strtoUCS((__le16 *)blobptr, ses->domainName, dlen, nls_cp);
348 attrptr = (struct ntlmssp2_name *) blobptr;
350 attrptr->type = cpu_to_le16(NTLMSSP_AV_NB_COMPUTER_NAME);
351 attrptr->length = cpu_to_le16(2 * wlen);
352 blobptr = (unsigned char *)attrptr + sizeof(struct ntlmssp2_name);
353 cifs_strtoUCS((__le16 *)blobptr, ses->server->hostname, wlen, nls_cp);
356 attrptr = (struct ntlmssp2_name *) blobptr;
358 attrptr->type = cpu_to_le16(NTLMSSP_AV_DNS_DOMAIN_NAME);
359 attrptr->length = cpu_to_le16(2 * dlen);
360 blobptr = (unsigned char *)attrptr + sizeof(struct ntlmssp2_name);
361 cifs_strtoUCS((__le16 *)blobptr, ses->domainName, dlen, nls_cp);
364 attrptr = (struct ntlmssp2_name *) blobptr;
366 attrptr->type = cpu_to_le16(NTLMSSP_AV_DNS_COMPUTER_NAME);
367 attrptr->length = cpu_to_le16(2 * wlen);
368 blobptr = (unsigned char *)attrptr + sizeof(struct ntlmssp2_name);
369 cifs_strtoUCS((__le16 *)blobptr, ses->server->hostname, wlen, nls_cp);
372 attrptr = (struct ntlmssp2_name *) blobptr;
374 attrptr->type = cpu_to_le16(NTLMSSP_AV_TIMESTAMP);
375 attrptr->length = cpu_to_le16(sizeof(__le64));
376 blobptr = (unsigned char *)attrptr + sizeof(struct ntlmssp2_name);
377 curtime = cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME));
378 memcpy(blobptr, &curtime, sizeof(__le64));
383 /* Server has provided av pairs/target info in the type 2 challenge
384 * packet and we have plucked it and stored within smb session.
385 * We parse that blob here to find netbios domain name to be used
386 * as part of ntlmv2 authentication (in Target String), if not already
387 * specified on the command line.
388 * If this function returns without any error but without fetching
389 * domain name, authentication may fail against some server but
390 * may not fail against other (those who are not very particular
391 * about target string i.e. for some, just user name might suffice.
394 find_domain_name(struct cifsSesInfo *ses, const struct nls_table *nls_cp)
396 unsigned int attrsize;
398 unsigned int onesize = sizeof(struct ntlmssp2_name);
399 unsigned char *blobptr;
400 unsigned char *blobend;
401 struct ntlmssp2_name *attrptr;
403 if (!ses->tilen || !ses->tiblob)
406 blobptr = ses->tiblob;
407 blobend = ses->tiblob + ses->tilen;
409 while (blobptr + onesize < blobend) {
410 attrptr = (struct ntlmssp2_name *) blobptr;
411 type = le16_to_cpu(attrptr->type);
412 if (type == NTLMSSP_AV_EOL)
414 blobptr += 2; /* advance attr type */
415 attrsize = le16_to_cpu(attrptr->length);
416 blobptr += 2; /* advance attr size */
417 if (blobptr + attrsize > blobend)
419 if (type == NTLMSSP_AV_NB_DOMAIN_NAME) {
422 if (!ses->domainName) {
424 kmalloc(attrsize + 1, GFP_KERNEL);
425 if (!ses->domainName)
427 cifs_from_ucs2(ses->domainName,
428 (__le16 *)blobptr, attrsize, attrsize,
433 blobptr += attrsize; /* advance attr value */
439 static int calc_ntlmv2_hash(struct cifsSesInfo *ses,
440 const struct nls_table *nls_cp)
444 char nt_hash[CIFS_NTHASH_SIZE];
449 if (!ses->server->secmech.sdeschmacmd5) {
450 cERROR(1, "calc_ntlmv2_hash: can't generate ntlmv2 hash\n");
454 /* calculate md4 hash of password */
455 E_md4hash(ses->password, nt_hash);
457 crypto_shash_setkey(ses->server->secmech.hmacmd5, nt_hash,
460 rc = crypto_shash_init(&ses->server->secmech.sdeschmacmd5->shash);
462 cERROR(1, "calc_ntlmv2_hash: could not init hmacmd5\n");
466 /* convert ses->userName to unicode and uppercase */
467 len = strlen(ses->userName);
468 user = kmalloc(2 + (len * 2), GFP_KERNEL);
470 cERROR(1, "calc_ntlmv2_hash: user mem alloc failure\n");
474 len = cifs_strtoUCS((__le16 *)user, ses->userName, len, nls_cp);
477 crypto_shash_update(&ses->server->secmech.sdeschmacmd5->shash,
478 (char *)user, 2 * len);
480 /* convert ses->domainName to unicode and uppercase */
481 if (ses->domainName) {
482 len = strlen(ses->domainName);
484 domain = kmalloc(2 + (len * 2), GFP_KERNEL);
485 if (domain == NULL) {
486 cERROR(1, "calc_ntlmv2_hash: domain mem alloc failure");
490 len = cifs_strtoUCS((__le16 *)domain, ses->domainName, len,
492 crypto_shash_update(&ses->server->secmech.sdeschmacmd5->shash,
493 (char *)domain, 2 * len);
495 } else if (ses->serverName) {
496 len = strlen(ses->serverName);
498 server = kmalloc(2 + (len * 2), GFP_KERNEL);
499 if (server == NULL) {
500 cERROR(1, "calc_ntlmv2_hash: server mem alloc failure");
504 len = cifs_strtoUCS((__le16 *)server, ses->serverName, len,
506 crypto_shash_update(&ses->server->secmech.sdeschmacmd5->shash,
507 (char *)server, 2 * len);
511 rc = crypto_shash_final(&ses->server->secmech.sdeschmacmd5->shash,
521 CalcNTLMv2_response(const struct cifsSesInfo *ses)
524 unsigned int offset = CIFS_SESS_KEY_SIZE + 8;
526 if (!ses->server->secmech.sdeschmacmd5) {
527 cERROR(1, "calc_ntlmv2_hash: can't generate ntlmv2 hash\n");
531 crypto_shash_setkey(ses->server->secmech.hmacmd5,
532 ses->ntlmv2_hash, CIFS_HMAC_MD5_HASH_SIZE);
534 rc = crypto_shash_init(&ses->server->secmech.sdeschmacmd5->shash);
536 cERROR(1, "CalcNTLMv2_response: could not init hmacmd5");
540 memcpy(ses->auth_key.response + offset,
541 ses->cryptKey, CIFS_SERVER_CHALLENGE_SIZE);
542 crypto_shash_update(&ses->server->secmech.sdeschmacmd5->shash,
543 ses->auth_key.response + offset, ses->auth_key.len - offset);
545 rc = crypto_shash_final(&ses->server->secmech.sdeschmacmd5->shash,
546 ses->auth_key.response + CIFS_SESS_KEY_SIZE);
553 setup_ntlmv2_rsp(struct cifsSesInfo *ses, const struct nls_table *nls_cp)
557 struct ntlmv2_resp *buf;
559 if (ses->server->secType == RawNTLMSSP) {
560 if (!ses->domainName) {
561 rc = find_domain_name(ses, nls_cp);
563 cERROR(1, "error %d finding domain name", rc);
564 goto setup_ntlmv2_rsp_ret;
568 rc = build_avpair_blob(ses, nls_cp);
570 cERROR(1, "error %d building av pair blob", rc);
575 baselen = CIFS_SESS_KEY_SIZE + sizeof(struct ntlmv2_resp);
576 ses->auth_key.len = baselen + ses->tilen;
577 ses->auth_key.response = kmalloc(ses->auth_key.len, GFP_KERNEL);
578 if (!ses->auth_key.response) {
580 cERROR(1, "%s: Can't allocate auth blob", __func__);
581 goto setup_ntlmv2_rsp_ret;
584 buf = (struct ntlmv2_resp *)
585 (ses->auth_key.response + CIFS_SESS_KEY_SIZE);
586 buf->blob_signature = cpu_to_le32(0x00000101);
588 buf->time = cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME));
589 get_random_bytes(&buf->client_chal, sizeof(buf->client_chal));
592 memcpy(ses->auth_key.response + baselen, ses->tiblob, ses->tilen);
594 /* calculate ntlmv2_hash */
595 rc = calc_ntlmv2_hash(ses, nls_cp);
597 cERROR(1, "could not get v2 hash rc %d", rc);
598 goto setup_ntlmv2_rsp_ret;
601 /* calculate first part of the client response (CR1) */
602 rc = CalcNTLMv2_response(ses);
604 cERROR(1, "Could not calculate CR1 rc: %d", rc);
605 goto setup_ntlmv2_rsp_ret;
608 /* now calculate the session key for NTLMv2 */
609 crypto_shash_setkey(ses->server->secmech.hmacmd5,
610 ses->ntlmv2_hash, CIFS_HMAC_MD5_HASH_SIZE);
612 rc = crypto_shash_init(&ses->server->secmech.sdeschmacmd5->shash);
614 cERROR(1, "%s: Could not init hmacmd5\n", __func__);
615 goto setup_ntlmv2_rsp_ret;
618 crypto_shash_update(&ses->server->secmech.sdeschmacmd5->shash,
619 ses->auth_key.response + CIFS_SESS_KEY_SIZE,
620 CIFS_HMAC_MD5_HASH_SIZE);
622 rc = crypto_shash_final(&ses->server->secmech.sdeschmacmd5->shash,
623 ses->auth_key.response);
625 setup_ntlmv2_rsp_ret:
634 calc_seckey(struct cifsSesInfo *ses)
637 struct crypto_blkcipher *tfm_arc4;
638 struct scatterlist sgin, sgout;
639 struct blkcipher_desc desc;
640 unsigned char sec_key[CIFS_SESS_KEY_SIZE]; /* a nonce */
642 get_random_bytes(sec_key, CIFS_SESS_KEY_SIZE);
644 tfm_arc4 = crypto_alloc_blkcipher("ecb(arc4)", 0, CRYPTO_ALG_ASYNC);
645 if (!tfm_arc4 || IS_ERR(tfm_arc4)) {
646 cERROR(1, "could not allocate crypto API arc4\n");
647 return PTR_ERR(tfm_arc4);
652 crypto_blkcipher_setkey(tfm_arc4, ses->auth_key.response,
655 sg_init_one(&sgin, sec_key, CIFS_SESS_KEY_SIZE);
656 sg_init_one(&sgout, ses->ntlmssp.ciphertext, CIFS_CPHTXT_SIZE);
658 rc = crypto_blkcipher_encrypt(&desc, &sgout, &sgin, CIFS_CPHTXT_SIZE);
660 cERROR(1, "could not encrypt session key rc: %d\n", rc);
661 crypto_free_blkcipher(tfm_arc4);
665 /* make secondary_key/nonce as session key */
666 memcpy(ses->auth_key.response, sec_key, CIFS_SESS_KEY_SIZE);
667 /* and make len as that of session key only */
668 ses->auth_key.len = CIFS_SESS_KEY_SIZE;
670 crypto_free_blkcipher(tfm_arc4);
676 cifs_crypto_shash_release(struct TCP_Server_Info *server)
678 if (server->secmech.md5)
679 crypto_free_shash(server->secmech.md5);
681 if (server->secmech.hmacmd5)
682 crypto_free_shash(server->secmech.hmacmd5);
684 kfree(server->secmech.sdeschmacmd5);
686 kfree(server->secmech.sdescmd5);
690 cifs_crypto_shash_allocate(struct TCP_Server_Info *server)
695 server->secmech.hmacmd5 = crypto_alloc_shash("hmac(md5)", 0, 0);
696 if (!server->secmech.hmacmd5 ||
697 IS_ERR(server->secmech.hmacmd5)) {
698 cERROR(1, "could not allocate crypto hmacmd5\n");
699 return PTR_ERR(server->secmech.hmacmd5);
702 server->secmech.md5 = crypto_alloc_shash("md5", 0, 0);
703 if (!server->secmech.md5 || IS_ERR(server->secmech.md5)) {
704 cERROR(1, "could not allocate crypto md5\n");
705 rc = PTR_ERR(server->secmech.md5);
706 goto crypto_allocate_md5_fail;
709 size = sizeof(struct shash_desc) +
710 crypto_shash_descsize(server->secmech.hmacmd5);
711 server->secmech.sdeschmacmd5 = kmalloc(size, GFP_KERNEL);
712 if (!server->secmech.sdeschmacmd5) {
713 cERROR(1, "cifs_crypto_shash_allocate: can't alloc hmacmd5\n");
715 goto crypto_allocate_hmacmd5_sdesc_fail;
717 server->secmech.sdeschmacmd5->shash.tfm = server->secmech.hmacmd5;
718 server->secmech.sdeschmacmd5->shash.flags = 0x0;
721 size = sizeof(struct shash_desc) +
722 crypto_shash_descsize(server->secmech.md5);
723 server->secmech.sdescmd5 = kmalloc(size, GFP_KERNEL);
724 if (!server->secmech.sdescmd5) {
725 cERROR(1, "cifs_crypto_shash_allocate: can't alloc md5\n");
727 goto crypto_allocate_md5_sdesc_fail;
729 server->secmech.sdescmd5->shash.tfm = server->secmech.md5;
730 server->secmech.sdescmd5->shash.flags = 0x0;
734 crypto_allocate_md5_sdesc_fail:
735 kfree(server->secmech.sdeschmacmd5);
737 crypto_allocate_hmacmd5_sdesc_fail:
738 crypto_free_shash(server->secmech.md5);
740 crypto_allocate_md5_fail:
741 crypto_free_shash(server->secmech.hmacmd5);