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>
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. Note we only use the
36 * 1st eight bytes and that the smb header signature field on input contains
37 * the sequence number before this function is called. Also, this function
38 * should be called with the server->srv_mutex held.
40 static int cifs_calculate_signature(const struct smb_hdr *cifs_pdu,
41 struct TCP_Server_Info *server, char *signature)
45 if (cifs_pdu == NULL || signature == NULL || server == NULL)
48 if (!server->secmech.sdescmd5) {
49 cERROR(1, "%s: Can't generate signature\n", __func__);
53 rc = crypto_shash_init(&server->secmech.sdescmd5->shash);
55 cERROR(1, "%s: Could not init md5\n", __func__);
59 rc = crypto_shash_update(&server->secmech.sdescmd5->shash,
60 server->session_key.response, server->session_key.len);
62 cERROR(1, "%s: Could not update with response\n", __func__);
66 rc = crypto_shash_update(&server->secmech.sdescmd5->shash,
67 cifs_pdu->Protocol, be32_to_cpu(cifs_pdu->smb_buf_length));
69 cERROR(1, "%s: Could not update with payload\n", __func__);
73 rc = crypto_shash_final(&server->secmech.sdescmd5->shash, signature);
75 cERROR(1, "%s: Could not generate md5 hash\n", __func__);
80 /* must be called with server->srv_mutex held */
81 int cifs_sign_smb(struct smb_hdr *cifs_pdu, struct TCP_Server_Info *server,
82 __u32 *pexpected_response_sequence_number)
85 char smb_signature[20];
87 if ((cifs_pdu == NULL) || (server == NULL))
90 if ((cifs_pdu->Flags2 & SMBFLG2_SECURITY_SIGNATURE) == 0)
93 cifs_pdu->Signature.Sequence.SequenceNumber =
94 cpu_to_le32(server->sequence_number);
95 cifs_pdu->Signature.Sequence.Reserved = 0;
97 *pexpected_response_sequence_number = server->sequence_number++;
98 server->sequence_number++;
100 rc = cifs_calculate_signature(cifs_pdu, server, smb_signature);
102 memset(cifs_pdu->Signature.SecuritySignature, 0, 8);
104 memcpy(cifs_pdu->Signature.SecuritySignature, smb_signature, 8);
109 static int cifs_calc_signature2(const struct kvec *iov, int n_vec,
110 struct TCP_Server_Info *server, char *signature)
115 if (iov == NULL || signature == NULL || server == NULL)
118 if (!server->secmech.sdescmd5) {
119 cERROR(1, "%s: Can't generate signature\n", __func__);
123 rc = crypto_shash_init(&server->secmech.sdescmd5->shash);
125 cERROR(1, "%s: Could not init md5\n", __func__);
129 rc = crypto_shash_update(&server->secmech.sdescmd5->shash,
130 server->session_key.response, server->session_key.len);
132 cERROR(1, "%s: Could not update with response\n", __func__);
136 for (i = 0; i < n_vec; i++) {
137 if (iov[i].iov_len == 0)
139 if (iov[i].iov_base == NULL) {
140 cERROR(1, "null iovec entry");
143 /* The first entry includes a length field (which does not get
144 signed that occupies the first 4 bytes before the header */
146 if (iov[0].iov_len <= 8) /* cmd field at offset 9 */
147 break; /* nothing to sign or corrupt header */
149 crypto_shash_update(&server->secmech.sdescmd5->shash,
150 iov[i].iov_base + 4, iov[i].iov_len - 4);
153 crypto_shash_update(&server->secmech.sdescmd5->shash,
154 iov[i].iov_base, iov[i].iov_len);
157 cERROR(1, "%s: Could not update with payload\n",
163 rc = crypto_shash_final(&server->secmech.sdescmd5->shash, signature);
165 cERROR(1, "%s: Could not generate md5 hash\n", __func__);
170 /* must be called with server->srv_mutex held */
171 int cifs_sign_smb2(struct kvec *iov, int n_vec, struct TCP_Server_Info *server,
172 __u32 *pexpected_response_sequence_number)
175 char smb_signature[20];
176 struct smb_hdr *cifs_pdu = iov[0].iov_base;
178 if ((cifs_pdu == NULL) || (server == NULL))
181 if ((cifs_pdu->Flags2 & SMBFLG2_SECURITY_SIGNATURE) == 0)
184 cifs_pdu->Signature.Sequence.SequenceNumber =
185 cpu_to_le32(server->sequence_number);
186 cifs_pdu->Signature.Sequence.Reserved = 0;
188 *pexpected_response_sequence_number = server->sequence_number++;
189 server->sequence_number++;
191 rc = cifs_calc_signature2(iov, n_vec, server, smb_signature);
193 memset(cifs_pdu->Signature.SecuritySignature, 0, 8);
195 memcpy(cifs_pdu->Signature.SecuritySignature, smb_signature, 8);
200 int cifs_verify_signature(struct smb_hdr *cifs_pdu,
201 struct TCP_Server_Info *server,
202 __u32 expected_sequence_number)
205 char server_response_sig[8];
206 char what_we_think_sig_should_be[20];
208 if (cifs_pdu == NULL || server == NULL)
211 if (!server->session_estab)
214 if (cifs_pdu->Command == SMB_COM_LOCKING_ANDX) {
215 struct smb_com_lock_req *pSMB =
216 (struct smb_com_lock_req *)cifs_pdu;
217 if (pSMB->LockType & LOCKING_ANDX_OPLOCK_RELEASE)
221 /* BB what if signatures are supposed to be on for session but
222 server does not send one? BB */
224 /* Do not need to verify session setups with signature "BSRSPYL " */
225 if (memcmp(cifs_pdu->Signature.SecuritySignature, "BSRSPYL ", 8) == 0)
226 cFYI(1, "dummy signature received for smb command 0x%x",
229 /* save off the origiginal signature so we can modify the smb and check
230 its signature against what the server sent */
231 memcpy(server_response_sig, cifs_pdu->Signature.SecuritySignature, 8);
233 cifs_pdu->Signature.Sequence.SequenceNumber =
234 cpu_to_le32(expected_sequence_number);
235 cifs_pdu->Signature.Sequence.Reserved = 0;
237 mutex_lock(&server->srv_mutex);
238 rc = cifs_calculate_signature(cifs_pdu, server,
239 what_we_think_sig_should_be);
240 mutex_unlock(&server->srv_mutex);
245 /* cifs_dump_mem("what we think it should be: ",
246 what_we_think_sig_should_be, 16); */
248 if (memcmp(server_response_sig, what_we_think_sig_should_be, 8))
255 /* first calculate 24 bytes ntlm response and then 16 byte session key */
256 int setup_ntlm_response(struct cifs_ses *ses)
259 unsigned int temp_len = CIFS_SESS_KEY_SIZE + CIFS_AUTH_RESP_SIZE;
260 char temp_key[CIFS_SESS_KEY_SIZE];
265 ses->auth_key.response = kmalloc(temp_len, GFP_KERNEL);
266 if (!ses->auth_key.response) {
267 cERROR(1, "NTLM can't allocate (%u bytes) memory", temp_len);
270 ses->auth_key.len = temp_len;
272 rc = SMBNTencrypt(ses->password, ses->server->cryptkey,
273 ses->auth_key.response + CIFS_SESS_KEY_SIZE);
275 cFYI(1, "%s Can't generate NTLM response, error: %d",
280 rc = E_md4hash(ses->password, temp_key);
282 cFYI(1, "%s Can't generate NT hash, error: %d", __func__, rc);
286 rc = mdfour(ses->auth_key.response, temp_key, CIFS_SESS_KEY_SIZE);
288 cFYI(1, "%s Can't generate NTLM session key, error: %d",
294 #ifdef CONFIG_CIFS_WEAK_PW_HASH
295 int calc_lanman_hash(const char *password, const char *cryptkey, bool encrypt,
296 char *lnm_session_key)
300 char password_with_pad[CIFS_ENCPWD_SIZE];
302 memset(password_with_pad, 0, CIFS_ENCPWD_SIZE);
304 strncpy(password_with_pad, password, CIFS_ENCPWD_SIZE);
306 if (!encrypt && global_secflags & CIFSSEC_MAY_PLNTXT) {
307 memset(lnm_session_key, 0, CIFS_SESS_KEY_SIZE);
308 memcpy(lnm_session_key, password_with_pad,
313 /* calculate old style session key */
314 /* calling toupper is less broken than repeatedly
315 calling nls_toupper would be since that will never
316 work for UTF8, but neither handles multibyte code pages
317 but the only alternative would be converting to UCS-16 (Unicode)
318 (using a routine something like UniStrupr) then
319 uppercasing and then converting back from Unicode - which
320 would only worth doing it if we knew it were utf8. Basically
321 utf8 and other multibyte codepages each need their own strupper
322 function since a byte at a time will ont work. */
324 for (i = 0; i < CIFS_ENCPWD_SIZE; i++)
325 password_with_pad[i] = toupper(password_with_pad[i]);
327 rc = SMBencrypt(password_with_pad, cryptkey, lnm_session_key);
331 #endif /* CIFS_WEAK_PW_HASH */
333 /* Build a proper attribute value/target info pairs blob.
334 * Fill in netbios and dns domain name and workstation name
335 * and client time (total five av pairs and + one end of fields indicator.
336 * Allocate domain name which gets freed when session struct is deallocated.
339 build_avpair_blob(struct cifs_ses *ses, const struct nls_table *nls_cp)
343 unsigned int size = 6 * sizeof(struct ntlmssp2_name);
345 char *defdmname = "WORKGROUP";
346 unsigned char *blobptr;
347 struct ntlmssp2_name *attrptr;
349 if (!ses->domainName) {
350 ses->domainName = kstrdup(defdmname, GFP_KERNEL);
351 if (!ses->domainName)
355 dlen = strlen(ses->domainName);
356 wlen = strlen(ses->server->hostname);
358 /* The length of this blob is a size which is
359 * six times the size of a structure which holds name/size +
360 * two times the unicode length of a domain name +
361 * two times the unicode length of a server name +
362 * size of a timestamp (which is 8 bytes).
364 ses->auth_key.len = size + 2 * (2 * dlen) + 2 * (2 * wlen) + 8;
365 ses->auth_key.response = kzalloc(ses->auth_key.len, GFP_KERNEL);
366 if (!ses->auth_key.response) {
367 ses->auth_key.len = 0;
368 cERROR(1, "Challenge target info allocation failure");
372 blobptr = ses->auth_key.response;
373 attrptr = (struct ntlmssp2_name *) blobptr;
375 attrptr->type = cpu_to_le16(NTLMSSP_AV_NB_DOMAIN_NAME);
376 attrptr->length = cpu_to_le16(2 * dlen);
377 blobptr = (unsigned char *)attrptr + sizeof(struct ntlmssp2_name);
378 cifs_strtoUCS((__le16 *)blobptr, ses->domainName, dlen, nls_cp);
381 attrptr = (struct ntlmssp2_name *) blobptr;
383 attrptr->type = cpu_to_le16(NTLMSSP_AV_NB_COMPUTER_NAME);
384 attrptr->length = cpu_to_le16(2 * wlen);
385 blobptr = (unsigned char *)attrptr + sizeof(struct ntlmssp2_name);
386 cifs_strtoUCS((__le16 *)blobptr, ses->server->hostname, wlen, nls_cp);
389 attrptr = (struct ntlmssp2_name *) blobptr;
391 attrptr->type = cpu_to_le16(NTLMSSP_AV_DNS_DOMAIN_NAME);
392 attrptr->length = cpu_to_le16(2 * dlen);
393 blobptr = (unsigned char *)attrptr + sizeof(struct ntlmssp2_name);
394 cifs_strtoUCS((__le16 *)blobptr, ses->domainName, dlen, nls_cp);
397 attrptr = (struct ntlmssp2_name *) blobptr;
399 attrptr->type = cpu_to_le16(NTLMSSP_AV_DNS_COMPUTER_NAME);
400 attrptr->length = cpu_to_le16(2 * wlen);
401 blobptr = (unsigned char *)attrptr + sizeof(struct ntlmssp2_name);
402 cifs_strtoUCS((__le16 *)blobptr, ses->server->hostname, wlen, nls_cp);
405 attrptr = (struct ntlmssp2_name *) blobptr;
407 attrptr->type = cpu_to_le16(NTLMSSP_AV_TIMESTAMP);
408 attrptr->length = cpu_to_le16(sizeof(__le64));
409 blobptr = (unsigned char *)attrptr + sizeof(struct ntlmssp2_name);
410 curtime = cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME));
411 memcpy(blobptr, &curtime, sizeof(__le64));
416 /* Server has provided av pairs/target info in the type 2 challenge
417 * packet and we have plucked it and stored within smb session.
418 * We parse that blob here to find netbios domain name to be used
419 * as part of ntlmv2 authentication (in Target String), if not already
420 * specified on the command line.
421 * If this function returns without any error but without fetching
422 * domain name, authentication may fail against some server but
423 * may not fail against other (those who are not very particular
424 * about target string i.e. for some, just user name might suffice.
427 find_domain_name(struct cifs_ses *ses, const struct nls_table *nls_cp)
429 unsigned int attrsize;
431 unsigned int onesize = sizeof(struct ntlmssp2_name);
432 unsigned char *blobptr;
433 unsigned char *blobend;
434 struct ntlmssp2_name *attrptr;
436 if (!ses->auth_key.len || !ses->auth_key.response)
439 blobptr = ses->auth_key.response;
440 blobend = blobptr + ses->auth_key.len;
442 while (blobptr + onesize < blobend) {
443 attrptr = (struct ntlmssp2_name *) blobptr;
444 type = le16_to_cpu(attrptr->type);
445 if (type == NTLMSSP_AV_EOL)
447 blobptr += 2; /* advance attr type */
448 attrsize = le16_to_cpu(attrptr->length);
449 blobptr += 2; /* advance attr size */
450 if (blobptr + attrsize > blobend)
452 if (type == NTLMSSP_AV_NB_DOMAIN_NAME) {
455 if (!ses->domainName) {
457 kmalloc(attrsize + 1, GFP_KERNEL);
458 if (!ses->domainName)
460 cifs_from_ucs2(ses->domainName,
461 (__le16 *)blobptr, attrsize, attrsize,
466 blobptr += attrsize; /* advance attr value */
472 static int calc_ntlmv2_hash(struct cifs_ses *ses, char *ntlmv2_hash,
473 const struct nls_table *nls_cp)
477 char nt_hash[CIFS_NTHASH_SIZE];
482 if (!ses->server->secmech.sdeschmacmd5) {
483 cERROR(1, "calc_ntlmv2_hash: can't generate ntlmv2 hash\n");
487 /* calculate md4 hash of password */
488 E_md4hash(ses->password, nt_hash);
490 rc = crypto_shash_setkey(ses->server->secmech.hmacmd5, nt_hash,
493 cERROR(1, "%s: Could not set NT Hash as a key", __func__);
497 rc = crypto_shash_init(&ses->server->secmech.sdeschmacmd5->shash);
499 cERROR(1, "calc_ntlmv2_hash: could not init hmacmd5\n");
503 /* convert ses->user_name to unicode and uppercase */
504 len = strlen(ses->user_name);
505 user = kmalloc(2 + (len * 2), GFP_KERNEL);
507 cERROR(1, "calc_ntlmv2_hash: user mem alloc failure\n");
511 len = cifs_strtoUCS((__le16 *)user, ses->user_name, len, nls_cp);
514 rc = crypto_shash_update(&ses->server->secmech.sdeschmacmd5->shash,
515 (char *)user, 2 * len);
518 cERROR(1, "%s: Could not update with user\n", __func__);
522 /* convert ses->domainName to unicode and uppercase */
523 if (ses->domainName) {
524 len = strlen(ses->domainName);
526 domain = kmalloc(2 + (len * 2), GFP_KERNEL);
527 if (domain == NULL) {
528 cERROR(1, "calc_ntlmv2_hash: domain mem alloc failure");
532 len = cifs_strtoUCS((__le16 *)domain, ses->domainName, len,
535 crypto_shash_update(&ses->server->secmech.sdeschmacmd5->shash,
536 (char *)domain, 2 * len);
539 cERROR(1, "%s: Could not update with domain\n",
543 } else if (ses->serverName) {
544 len = strlen(ses->serverName);
546 server = kmalloc(2 + (len * 2), GFP_KERNEL);
547 if (server == NULL) {
548 cERROR(1, "calc_ntlmv2_hash: server mem alloc failure");
552 len = cifs_strtoUCS((__le16 *)server, ses->serverName, len,
555 crypto_shash_update(&ses->server->secmech.sdeschmacmd5->shash,
556 (char *)server, 2 * len);
559 cERROR(1, "%s: Could not update with server\n",
565 rc = crypto_shash_final(&ses->server->secmech.sdeschmacmd5->shash,
568 cERROR(1, "%s: Could not generate md5 hash\n", __func__);
574 CalcNTLMv2_response(const struct cifs_ses *ses, char *ntlmv2_hash)
577 unsigned int offset = CIFS_SESS_KEY_SIZE + 8;
579 if (!ses->server->secmech.sdeschmacmd5) {
580 cERROR(1, "calc_ntlmv2_hash: can't generate ntlmv2 hash\n");
584 rc = crypto_shash_setkey(ses->server->secmech.hmacmd5,
585 ntlmv2_hash, CIFS_HMAC_MD5_HASH_SIZE);
587 cERROR(1, "%s: Could not set NTLMV2 Hash as a key", __func__);
591 rc = crypto_shash_init(&ses->server->secmech.sdeschmacmd5->shash);
593 cERROR(1, "CalcNTLMv2_response: could not init hmacmd5");
597 if (ses->server->secType == RawNTLMSSP)
598 memcpy(ses->auth_key.response + offset,
599 ses->ntlmssp->cryptkey, CIFS_SERVER_CHALLENGE_SIZE);
601 memcpy(ses->auth_key.response + offset,
602 ses->server->cryptkey, CIFS_SERVER_CHALLENGE_SIZE);
603 rc = crypto_shash_update(&ses->server->secmech.sdeschmacmd5->shash,
604 ses->auth_key.response + offset, ses->auth_key.len - offset);
606 cERROR(1, "%s: Could not update with response\n", __func__);
610 rc = crypto_shash_final(&ses->server->secmech.sdeschmacmd5->shash,
611 ses->auth_key.response + CIFS_SESS_KEY_SIZE);
613 cERROR(1, "%s: Could not generate md5 hash\n", __func__);
620 setup_ntlmv2_rsp(struct cifs_ses *ses, const struct nls_table *nls_cp)
625 struct ntlmv2_resp *buf;
626 char ntlmv2_hash[16];
627 unsigned char *tiblob = NULL; /* target info blob */
629 if (ses->server->secType == RawNTLMSSP) {
630 if (!ses->domainName) {
631 rc = find_domain_name(ses, nls_cp);
633 cERROR(1, "error %d finding domain name", rc);
634 goto setup_ntlmv2_rsp_ret;
638 rc = build_avpair_blob(ses, nls_cp);
640 cERROR(1, "error %d building av pair blob", rc);
641 goto setup_ntlmv2_rsp_ret;
645 baselen = CIFS_SESS_KEY_SIZE + sizeof(struct ntlmv2_resp);
646 tilen = ses->auth_key.len;
647 tiblob = ses->auth_key.response;
649 ses->auth_key.response = kmalloc(baselen + tilen, GFP_KERNEL);
650 if (!ses->auth_key.response) {
652 ses->auth_key.len = 0;
653 cERROR(1, "%s: Can't allocate auth blob", __func__);
654 goto setup_ntlmv2_rsp_ret;
656 ses->auth_key.len += baselen;
658 buf = (struct ntlmv2_resp *)
659 (ses->auth_key.response + CIFS_SESS_KEY_SIZE);
660 buf->blob_signature = cpu_to_le32(0x00000101);
662 buf->time = cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME));
663 get_random_bytes(&buf->client_chal, sizeof(buf->client_chal));
666 memcpy(ses->auth_key.response + baselen, tiblob, tilen);
668 /* calculate ntlmv2_hash */
669 rc = calc_ntlmv2_hash(ses, ntlmv2_hash, nls_cp);
671 cERROR(1, "could not get v2 hash rc %d", rc);
672 goto setup_ntlmv2_rsp_ret;
675 /* calculate first part of the client response (CR1) */
676 rc = CalcNTLMv2_response(ses, ntlmv2_hash);
678 cERROR(1, "Could not calculate CR1 rc: %d", rc);
679 goto setup_ntlmv2_rsp_ret;
682 /* now calculate the session key for NTLMv2 */
683 rc = crypto_shash_setkey(ses->server->secmech.hmacmd5,
684 ntlmv2_hash, CIFS_HMAC_MD5_HASH_SIZE);
686 cERROR(1, "%s: Could not set NTLMV2 Hash as a key", __func__);
687 goto setup_ntlmv2_rsp_ret;
690 rc = crypto_shash_init(&ses->server->secmech.sdeschmacmd5->shash);
692 cERROR(1, "%s: Could not init hmacmd5\n", __func__);
693 goto setup_ntlmv2_rsp_ret;
696 rc = crypto_shash_update(&ses->server->secmech.sdeschmacmd5->shash,
697 ses->auth_key.response + CIFS_SESS_KEY_SIZE,
698 CIFS_HMAC_MD5_HASH_SIZE);
700 cERROR(1, "%s: Could not update with response\n", __func__);
701 goto setup_ntlmv2_rsp_ret;
704 rc = crypto_shash_final(&ses->server->secmech.sdeschmacmd5->shash,
705 ses->auth_key.response);
707 cERROR(1, "%s: Could not generate md5 hash\n", __func__);
709 setup_ntlmv2_rsp_ret:
716 calc_seckey(struct cifs_ses *ses)
719 struct crypto_blkcipher *tfm_arc4;
720 struct scatterlist sgin, sgout;
721 struct blkcipher_desc desc;
722 unsigned char sec_key[CIFS_SESS_KEY_SIZE]; /* a nonce */
724 get_random_bytes(sec_key, CIFS_SESS_KEY_SIZE);
726 tfm_arc4 = crypto_alloc_blkcipher("ecb(arc4)", 0, CRYPTO_ALG_ASYNC);
727 if (IS_ERR(tfm_arc4)) {
728 rc = PTR_ERR(tfm_arc4);
729 cERROR(1, "could not allocate crypto API arc4\n");
735 rc = crypto_blkcipher_setkey(tfm_arc4, ses->auth_key.response,
738 cERROR(1, "%s: Could not set response as a key", __func__);
742 sg_init_one(&sgin, sec_key, CIFS_SESS_KEY_SIZE);
743 sg_init_one(&sgout, ses->ntlmssp->ciphertext, CIFS_CPHTXT_SIZE);
745 rc = crypto_blkcipher_encrypt(&desc, &sgout, &sgin, CIFS_CPHTXT_SIZE);
747 cERROR(1, "could not encrypt session key rc: %d\n", rc);
748 crypto_free_blkcipher(tfm_arc4);
752 /* make secondary_key/nonce as session key */
753 memcpy(ses->auth_key.response, sec_key, CIFS_SESS_KEY_SIZE);
754 /* and make len as that of session key only */
755 ses->auth_key.len = CIFS_SESS_KEY_SIZE;
757 crypto_free_blkcipher(tfm_arc4);
763 cifs_crypto_shash_release(struct TCP_Server_Info *server)
765 if (server->secmech.md5)
766 crypto_free_shash(server->secmech.md5);
768 if (server->secmech.hmacmd5)
769 crypto_free_shash(server->secmech.hmacmd5);
771 kfree(server->secmech.sdeschmacmd5);
773 kfree(server->secmech.sdescmd5);
777 cifs_crypto_shash_allocate(struct TCP_Server_Info *server)
782 server->secmech.hmacmd5 = crypto_alloc_shash("hmac(md5)", 0, 0);
783 if (IS_ERR(server->secmech.hmacmd5)) {
784 cERROR(1, "could not allocate crypto hmacmd5\n");
785 return PTR_ERR(server->secmech.hmacmd5);
788 server->secmech.md5 = crypto_alloc_shash("md5", 0, 0);
789 if (IS_ERR(server->secmech.md5)) {
790 cERROR(1, "could not allocate crypto md5\n");
791 rc = PTR_ERR(server->secmech.md5);
792 goto crypto_allocate_md5_fail;
795 size = sizeof(struct shash_desc) +
796 crypto_shash_descsize(server->secmech.hmacmd5);
797 server->secmech.sdeschmacmd5 = kmalloc(size, GFP_KERNEL);
798 if (!server->secmech.sdeschmacmd5) {
799 cERROR(1, "cifs_crypto_shash_allocate: can't alloc hmacmd5\n");
801 goto crypto_allocate_hmacmd5_sdesc_fail;
803 server->secmech.sdeschmacmd5->shash.tfm = server->secmech.hmacmd5;
804 server->secmech.sdeschmacmd5->shash.flags = 0x0;
807 size = sizeof(struct shash_desc) +
808 crypto_shash_descsize(server->secmech.md5);
809 server->secmech.sdescmd5 = kmalloc(size, GFP_KERNEL);
810 if (!server->secmech.sdescmd5) {
811 cERROR(1, "cifs_crypto_shash_allocate: can't alloc md5\n");
813 goto crypto_allocate_md5_sdesc_fail;
815 server->secmech.sdescmd5->shash.tfm = server->secmech.md5;
816 server->secmech.sdescmd5->shash.flags = 0x0;
820 crypto_allocate_md5_sdesc_fail:
821 kfree(server->secmech.sdeschmacmd5);
823 crypto_allocate_hmacmd5_sdesc_fail:
824 crypto_free_shash(server->secmech.md5);
826 crypto_allocate_md5_fail:
827 crypto_free_shash(server->secmech.hmacmd5);