blob: 2cfb695d1f89effdb7355d654cc1d2986321acd5 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * fs/cifs/cifsencrypt.c
3 *
Steve French12b3b8f2006-02-09 21:12:47 +00004 * Copyright (C) International Business Machines Corp., 2005,2006
Linus Torvalds1da177e2005-04-16 15:20:36 -07005 * Author(s): Steve French (sfrench@us.ibm.com)
6 *
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.
11 *
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.
16 *
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
20 */
21
22#include <linux/fs.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090023#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070024#include "cifspdu.h"
Steve Frenchffdd6e42007-06-24 21:15:44 +000025#include "cifsglob.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070026#include "cifs_debug.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070027#include "cifs_unicode.h"
28#include "cifsproto.h"
Shirish Pargaonkar2b149f12010-09-18 22:02:18 -050029#include "ntlmssp.h"
Steve French7c7b25b2006-06-01 19:20:10 +000030#include <linux/ctype.h>
Steve French6d027cf2006-06-05 16:26:05 +000031#include <linux/random.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070032
Jeff Layton157c2492011-04-02 07:34:30 -040033/*
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.
39 */
Jeff Layton826a95e2011-10-11 06:41:32 -040040static int cifs_calc_signature(const struct kvec *iov, int n_vec,
41 struct TCP_Server_Info *server, char *signature)
Steve French84afc292005-12-02 13:32:45 -080042{
Steve Frenche9917a02006-03-31 21:22:00 +000043 int i;
Shirish Pargaonkar307fbd32010-10-21 14:25:17 -050044 int rc;
Steve French84afc292005-12-02 13:32:45 -080045
Shirish Pargaonkar21e73392010-10-21 06:42:55 -050046 if (iov == NULL || signature == NULL || server == NULL)
Steve Frenche9917a02006-03-31 21:22:00 +000047 return -EINVAL;
Steve French84afc292005-12-02 13:32:45 -080048
Shirish Pargaonkar307fbd32010-10-21 14:25:17 -050049 if (!server->secmech.sdescmd5) {
50 cERROR(1, "%s: Can't generate signature\n", __func__);
51 return -1;
52 }
53
54 rc = crypto_shash_init(&server->secmech.sdescmd5->shash);
55 if (rc) {
Shirish Pargaonkar14cae322011-06-20 16:14:03 -050056 cERROR(1, "%s: Could not init md5\n", __func__);
Shirish Pargaonkar307fbd32010-10-21 14:25:17 -050057 return rc;
58 }
59
Shirish Pargaonkar14cae322011-06-20 16:14:03 -050060 rc = crypto_shash_update(&server->secmech.sdescmd5->shash,
Shirish Pargaonkar307fbd32010-10-21 14:25:17 -050061 server->session_key.response, server->session_key.len);
Shirish Pargaonkar14cae322011-06-20 16:14:03 -050062 if (rc) {
63 cERROR(1, "%s: Could not update with response\n", __func__);
64 return rc;
65 }
Shirish Pargaonkar307fbd32010-10-21 14:25:17 -050066
Steve French50c2f752007-07-13 00:33:32 +000067 for (i = 0; i < n_vec; i++) {
Jeff Layton745542e2007-11-03 04:34:04 +000068 if (iov[i].iov_len == 0)
69 continue;
Steve Frenchffdd6e42007-06-24 21:15:44 +000070 if (iov[i].iov_base == NULL) {
Steve French56234e22010-09-08 20:57:05 +000071 cERROR(1, "null iovec entry");
Steve Frenche9917a02006-03-31 21:22:00 +000072 return -EIO;
Jeff Layton745542e2007-11-03 04:34:04 +000073 }
Steve Frenchffdd6e42007-06-24 21:15:44 +000074 /* The first entry includes a length field (which does not get
Steve Frenche9917a02006-03-31 21:22:00 +000075 signed that occupies the first 4 bytes before the header */
Steve Frenchffdd6e42007-06-24 21:15:44 +000076 if (i == 0) {
Steve French63d25832007-11-05 21:46:10 +000077 if (iov[0].iov_len <= 8) /* cmd field at offset 9 */
Steve Frenche9917a02006-03-31 21:22:00 +000078 break; /* nothing to sign or corrupt header */
Shirish Pargaonkar14cae322011-06-20 16:14:03 -050079 rc =
Shirish Pargaonkar307fbd32010-10-21 14:25:17 -050080 crypto_shash_update(&server->secmech.sdescmd5->shash,
81 iov[i].iov_base + 4, iov[i].iov_len - 4);
Shirish Pargaonkar14cae322011-06-20 16:14:03 -050082 } else {
83 rc =
Shirish Pargaonkar307fbd32010-10-21 14:25:17 -050084 crypto_shash_update(&server->secmech.sdescmd5->shash,
85 iov[i].iov_base, iov[i].iov_len);
Shirish Pargaonkar14cae322011-06-20 16:14:03 -050086 }
87 if (rc) {
88 cERROR(1, "%s: Could not update with payload\n",
89 __func__);
90 return rc;
91 }
Steve Frenche9917a02006-03-31 21:22:00 +000092 }
Steve French84afc292005-12-02 13:32:45 -080093
Shirish Pargaonkar307fbd32010-10-21 14:25:17 -050094 rc = crypto_shash_final(&server->secmech.sdescmd5->shash, signature);
Shirish Pargaonkar14cae322011-06-20 16:14:03 -050095 if (rc)
96 cERROR(1, "%s: Could not generate md5 hash\n", __func__);
Steve French84afc292005-12-02 13:32:45 -080097
Shirish Pargaonkar307fbd32010-10-21 14:25:17 -050098 return rc;
Steve French84afc292005-12-02 13:32:45 -080099}
100
Jeff Laytona0f8b4f2011-01-07 11:30:28 -0500101/* must be called with server->srv_mutex held */
Steve Frenchffdd6e42007-06-24 21:15:44 +0000102int cifs_sign_smb2(struct kvec *iov, int n_vec, struct TCP_Server_Info *server,
Steve French63d25832007-11-05 21:46:10 +0000103 __u32 *pexpected_response_sequence_number)
Steve French84afc292005-12-02 13:32:45 -0800104{
105 int rc = 0;
106 char smb_signature[20];
Jeff Layton826a95e2011-10-11 06:41:32 -0400107 struct smb_hdr *cifs_pdu = (struct smb_hdr *)iov[0].iov_base;
Steve French84afc292005-12-02 13:32:45 -0800108
Steve Frenchffdd6e42007-06-24 21:15:44 +0000109 if ((cifs_pdu == NULL) || (server == NULL))
Steve French84afc292005-12-02 13:32:45 -0800110 return -EINVAL;
111
Jeff Layton998d6fc2011-07-26 12:21:17 -0400112 if (!(cifs_pdu->Flags2 & SMBFLG2_SECURITY_SIGNATURE) ||
113 server->tcpStatus == CifsNeedNegotiate)
Steve French84afc292005-12-02 13:32:45 -0800114 return rc;
115
Jeff Layton998d6fc2011-07-26 12:21:17 -0400116 if (!server->session_estab) {
Jeff Laytonb4dacbc2011-10-11 06:41:32 -0400117 memcpy(cifs_pdu->Signature.SecuritySignature, "BSRSPYL", 8);
Jeff Layton998d6fc2011-07-26 12:21:17 -0400118 return rc;
119 }
120
Steve Frenchffdd6e42007-06-24 21:15:44 +0000121 cifs_pdu->Signature.Sequence.SequenceNumber =
Steve French84afc292005-12-02 13:32:45 -0800122 cpu_to_le32(server->sequence_number);
Steve Frenchffdd6e42007-06-24 21:15:44 +0000123 cifs_pdu->Signature.Sequence.Reserved = 0;
Steve French84afc292005-12-02 13:32:45 -0800124
Steve Frenchffdd6e42007-06-24 21:15:44 +0000125 *pexpected_response_sequence_number = server->sequence_number++;
126 server->sequence_number++;
Steve French84afc292005-12-02 13:32:45 -0800127
Jeff Layton826a95e2011-10-11 06:41:32 -0400128 rc = cifs_calc_signature(iov, n_vec, server, smb_signature);
Steve Frenchffdd6e42007-06-24 21:15:44 +0000129 if (rc)
130 memset(cifs_pdu->Signature.SecuritySignature, 0, 8);
131 else
132 memcpy(cifs_pdu->Signature.SecuritySignature, smb_signature, 8);
Steve French84afc292005-12-02 13:32:45 -0800133
Steve Frenchffdd6e42007-06-24 21:15:44 +0000134 return rc;
Steve French84afc292005-12-02 13:32:45 -0800135}
136
Jeff Layton826a95e2011-10-11 06:41:32 -0400137/* must be called with server->srv_mutex held */
138int cifs_sign_smb(struct smb_hdr *cifs_pdu, struct TCP_Server_Info *server,
139 __u32 *pexpected_response_sequence_number)
140{
141 struct kvec iov;
142
143 iov.iov_base = cifs_pdu;
144 iov.iov_len = be32_to_cpu(cifs_pdu->smb_buf_length) + 4;
145
146 return cifs_sign_smb2(&iov, 1, server,
147 pexpected_response_sequence_number);
148}
149
150int cifs_verify_signature(struct kvec *iov, unsigned int nr_iov,
Shirish Pargaonkar21e73392010-10-21 06:42:55 -0500151 struct TCP_Server_Info *server,
Steve Frenchffdd6e42007-06-24 21:15:44 +0000152 __u32 expected_sequence_number)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700153{
Steve Frenchc8e56f12010-09-08 21:10:58 +0000154 unsigned int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155 char server_response_sig[8];
156 char what_we_think_sig_should_be[20];
Jeff Layton826a95e2011-10-11 06:41:32 -0400157 struct smb_hdr *cifs_pdu = (struct smb_hdr *)iov[0].iov_base;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158
Shirish Pargaonkar21e73392010-10-21 06:42:55 -0500159 if (cifs_pdu == NULL || server == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160 return -EINVAL;
161
Jeff Layton9c4843e2011-06-06 15:40:23 -0400162 if (!server->session_estab)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163 return 0;
164
165 if (cifs_pdu->Command == SMB_COM_LOCKING_ANDX) {
Steve French50c2f752007-07-13 00:33:32 +0000166 struct smb_com_lock_req *pSMB =
Steve Frenchffdd6e42007-06-24 21:15:44 +0000167 (struct smb_com_lock_req *)cifs_pdu;
168 if (pSMB->LockType & LOCKING_ANDX_OPLOCK_RELEASE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169 return 0;
170 }
171
Steve French50c2f752007-07-13 00:33:32 +0000172 /* BB what if signatures are supposed to be on for session but
173 server does not send one? BB */
174
Linus Torvalds1da177e2005-04-16 15:20:36 -0700175 /* Do not need to verify session setups with signature "BSRSPYL " */
Steve French50c2f752007-07-13 00:33:32 +0000176 if (memcmp(cifs_pdu->Signature.SecuritySignature, "BSRSPYL ", 8) == 0)
Joe Perchesb6b38f72010-04-21 03:50:45 +0000177 cFYI(1, "dummy signature received for smb command 0x%x",
178 cifs_pdu->Command);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179
180 /* save off the origiginal signature so we can modify the smb and check
181 its signature against what the server sent */
Steve French50c2f752007-07-13 00:33:32 +0000182 memcpy(server_response_sig, cifs_pdu->Signature.SecuritySignature, 8);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700183
Steve French50c2f752007-07-13 00:33:32 +0000184 cifs_pdu->Signature.Sequence.SequenceNumber =
185 cpu_to_le32(expected_sequence_number);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186 cifs_pdu->Signature.Sequence.Reserved = 0;
187
Jeff Layton157c2492011-04-02 07:34:30 -0400188 mutex_lock(&server->srv_mutex);
Jeff Layton826a95e2011-10-11 06:41:32 -0400189 rc = cifs_calc_signature(iov, nr_iov, server,
190 what_we_think_sig_should_be);
Jeff Layton157c2492011-04-02 07:34:30 -0400191 mutex_unlock(&server->srv_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192
Steve French50c2f752007-07-13 00:33:32 +0000193 if (rc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700194 return rc;
195
Steve French50c2f752007-07-13 00:33:32 +0000196/* cifs_dump_mem("what we think it should be: ",
197 what_we_think_sig_should_be, 16); */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700198
Steve French50c2f752007-07-13 00:33:32 +0000199 if (memcmp(server_response_sig, what_we_think_sig_should_be, 8))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200 return -EACCES;
201 else
202 return 0;
203
204}
205
Shirish Pargaonkar21e73392010-10-21 06:42:55 -0500206/* first calculate 24 bytes ntlm response and then 16 byte session key */
Steve French96daf2b2011-05-27 04:34:02 +0000207int setup_ntlm_response(struct cifs_ses *ses)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208{
Shirish Pargaonkaree2c9252011-01-27 09:58:04 -0600209 int rc = 0;
Shirish Pargaonkar21e73392010-10-21 06:42:55 -0500210 unsigned int temp_len = CIFS_SESS_KEY_SIZE + CIFS_AUTH_RESP_SIZE;
211 char temp_key[CIFS_SESS_KEY_SIZE];
212
213 if (!ses)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214 return -EINVAL;
215
Shirish Pargaonkar21e73392010-10-21 06:42:55 -0500216 ses->auth_key.response = kmalloc(temp_len, GFP_KERNEL);
217 if (!ses->auth_key.response) {
218 cERROR(1, "NTLM can't allocate (%u bytes) memory", temp_len);
219 return -ENOMEM;
220 }
221 ses->auth_key.len = temp_len;
222
Shirish Pargaonkaree2c9252011-01-27 09:58:04 -0600223 rc = SMBNTencrypt(ses->password, ses->server->cryptkey,
Shirish Pargaonkar21e73392010-10-21 06:42:55 -0500224 ses->auth_key.response + CIFS_SESS_KEY_SIZE);
Shirish Pargaonkaree2c9252011-01-27 09:58:04 -0600225 if (rc) {
226 cFYI(1, "%s Can't generate NTLM response, error: %d",
227 __func__, rc);
228 return rc;
229 }
Shirish Pargaonkar21e73392010-10-21 06:42:55 -0500230
Shirish Pargaonkaree2c9252011-01-27 09:58:04 -0600231 rc = E_md4hash(ses->password, temp_key);
232 if (rc) {
233 cFYI(1, "%s Can't generate NT hash, error: %d", __func__, rc);
234 return rc;
235 }
Shirish Pargaonkar21e73392010-10-21 06:42:55 -0500236
Shirish Pargaonkaree2c9252011-01-27 09:58:04 -0600237 rc = mdfour(ses->auth_key.response, temp_key, CIFS_SESS_KEY_SIZE);
238 if (rc)
239 cFYI(1, "%s Can't generate NTLM session key, error: %d",
240 __func__, rc);
241
242 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243}
244
Steve French7c7b25b2006-06-01 19:20:10 +0000245#ifdef CONFIG_CIFS_WEAK_PW_HASH
Steve French43988d72011-04-19 18:23:31 +0000246int calc_lanman_hash(const char *password, const char *cryptkey, bool encrypt,
Jeff Layton4e53a3f2008-12-05 20:41:21 -0500247 char *lnm_session_key)
Steve French7c7b25b2006-06-01 19:20:10 +0000248{
249 int i;
Steve French43988d72011-04-19 18:23:31 +0000250 int rc;
Steve French7c7b25b2006-06-01 19:20:10 +0000251 char password_with_pad[CIFS_ENCPWD_SIZE];
252
253 memset(password_with_pad, 0, CIFS_ENCPWD_SIZE);
Jeff Layton4e53a3f2008-12-05 20:41:21 -0500254 if (password)
255 strncpy(password_with_pad, password, CIFS_ENCPWD_SIZE);
Steve French7c7b25b2006-06-01 19:20:10 +0000256
Jeff Layton04912d62010-04-24 07:57:45 -0400257 if (!encrypt && global_secflags & CIFSSEC_MAY_PLNTXT) {
Jeff Layton4e53a3f2008-12-05 20:41:21 -0500258 memset(lnm_session_key, 0, CIFS_SESS_KEY_SIZE);
259 memcpy(lnm_session_key, password_with_pad,
260 CIFS_ENCPWD_SIZE);
Steve French43988d72011-04-19 18:23:31 +0000261 return 0;
Jeff Layton4e53a3f2008-12-05 20:41:21 -0500262 }
Steve Frenchbdc4bf6e2006-06-02 22:57:13 +0000263
Steve French7c7b25b2006-06-01 19:20:10 +0000264 /* calculate old style session key */
265 /* calling toupper is less broken than repeatedly
266 calling nls_toupper would be since that will never
267 work for UTF8, but neither handles multibyte code pages
268 but the only alternative would be converting to UCS-16 (Unicode)
269 (using a routine something like UniStrupr) then
270 uppercasing and then converting back from Unicode - which
271 would only worth doing it if we knew it were utf8. Basically
272 utf8 and other multibyte codepages each need their own strupper
273 function since a byte at a time will ont work. */
274
Shirish Pargaonkaref571ca2008-07-24 15:56:05 +0000275 for (i = 0; i < CIFS_ENCPWD_SIZE; i++)
Steve French7c7b25b2006-06-01 19:20:10 +0000276 password_with_pad[i] = toupper(password_with_pad[i]);
Steve French7c7b25b2006-06-01 19:20:10 +0000277
Steve French43988d72011-04-19 18:23:31 +0000278 rc = SMBencrypt(password_with_pad, cryptkey, lnm_session_key);
Jeff Layton4e53a3f2008-12-05 20:41:21 -0500279
Steve French43988d72011-04-19 18:23:31 +0000280 return rc;
Steve French7c7b25b2006-06-01 19:20:10 +0000281}
282#endif /* CIFS_WEAK_PW_HASH */
283
Shirish Pargaonkar9daa42e2010-10-10 13:21:05 -0500284/* Build a proper attribute value/target info pairs blob.
285 * Fill in netbios and dns domain name and workstation name
286 * and client time (total five av pairs and + one end of fields indicator.
287 * Allocate domain name which gets freed when session struct is deallocated.
Shirish Pargaonkar2b149f12010-09-18 22:02:18 -0500288 */
289static int
Steve French96daf2b2011-05-27 04:34:02 +0000290build_avpair_blob(struct cifs_ses *ses, const struct nls_table *nls_cp)
Shirish Pargaonkar2b149f12010-09-18 22:02:18 -0500291{
Shirish Pargaonkar9daa42e2010-10-10 13:21:05 -0500292 unsigned int dlen;
Shirish Pargaonkarcfbd6f82011-08-24 23:05:46 -0500293 unsigned int size = 2 * sizeof(struct ntlmssp2_name);
Shirish Pargaonkar9daa42e2010-10-10 13:21:05 -0500294 char *defdmname = "WORKGROUP";
295 unsigned char *blobptr;
Shirish Pargaonkar2b149f12010-09-18 22:02:18 -0500296 struct ntlmssp2_name *attrptr;
297
Shirish Pargaonkar9daa42e2010-10-10 13:21:05 -0500298 if (!ses->domainName) {
299 ses->domainName = kstrdup(defdmname, GFP_KERNEL);
300 if (!ses->domainName)
301 return -ENOMEM;
302 }
303
304 dlen = strlen(ses->domainName);
Shirish Pargaonkar9daa42e2010-10-10 13:21:05 -0500305
Shirish Pargaonkarcfbd6f82011-08-24 23:05:46 -0500306 /*
307 * The length of this blob is two times the size of a
308 * structure (av pair) which holds name/size
309 * ( for NTLMSSP_AV_NB_DOMAIN_NAME followed by NTLMSSP_AV_EOL ) +
310 * unicode length of a netbios domain name
Shirish Pargaonkar9daa42e2010-10-10 13:21:05 -0500311 */
Shirish Pargaonkarcfbd6f82011-08-24 23:05:46 -0500312 ses->auth_key.len = size + 2 * dlen;
Shirish Pargaonkard3686d52010-10-28 09:53:07 -0500313 ses->auth_key.response = kzalloc(ses->auth_key.len, GFP_KERNEL);
314 if (!ses->auth_key.response) {
315 ses->auth_key.len = 0;
Shirish Pargaonkar2b149f12010-09-18 22:02:18 -0500316 cERROR(1, "Challenge target info allocation failure");
317 return -ENOMEM;
318 }
Shirish Pargaonkar9daa42e2010-10-10 13:21:05 -0500319
Shirish Pargaonkard3686d52010-10-28 09:53:07 -0500320 blobptr = ses->auth_key.response;
Shirish Pargaonkar9daa42e2010-10-10 13:21:05 -0500321 attrptr = (struct ntlmssp2_name *) blobptr;
322
Shirish Pargaonkarcfbd6f82011-08-24 23:05:46 -0500323 /*
324 * As defined in MS-NTLM 3.3.2, just this av pair field
325 * is sufficient as part of the temp
326 */
Shirish Pargaonkar9daa42e2010-10-10 13:21:05 -0500327 attrptr->type = cpu_to_le16(NTLMSSP_AV_NB_DOMAIN_NAME);
328 attrptr->length = cpu_to_le16(2 * dlen);
329 blobptr = (unsigned char *)attrptr + sizeof(struct ntlmssp2_name);
330 cifs_strtoUCS((__le16 *)blobptr, ses->domainName, dlen, nls_cp);
331
Shirish Pargaonkar2b149f12010-09-18 22:02:18 -0500332 return 0;
333}
334
335/* Server has provided av pairs/target info in the type 2 challenge
336 * packet and we have plucked it and stored within smb session.
337 * We parse that blob here to find netbios domain name to be used
338 * as part of ntlmv2 authentication (in Target String), if not already
339 * specified on the command line.
340 * If this function returns without any error but without fetching
341 * domain name, authentication may fail against some server but
342 * may not fail against other (those who are not very particular
343 * about target string i.e. for some, just user name might suffice.
344 */
345static int
Steve French96daf2b2011-05-27 04:34:02 +0000346find_domain_name(struct cifs_ses *ses, const struct nls_table *nls_cp)
Shirish Pargaonkar2b149f12010-09-18 22:02:18 -0500347{
348 unsigned int attrsize;
349 unsigned int type;
350 unsigned int onesize = sizeof(struct ntlmssp2_name);
351 unsigned char *blobptr;
352 unsigned char *blobend;
353 struct ntlmssp2_name *attrptr;
354
Shirish Pargaonkard3686d52010-10-28 09:53:07 -0500355 if (!ses->auth_key.len || !ses->auth_key.response)
Shirish Pargaonkar2b149f12010-09-18 22:02:18 -0500356 return 0;
357
Shirish Pargaonkard3686d52010-10-28 09:53:07 -0500358 blobptr = ses->auth_key.response;
359 blobend = blobptr + ses->auth_key.len;
Shirish Pargaonkar2b149f12010-09-18 22:02:18 -0500360
361 while (blobptr + onesize < blobend) {
362 attrptr = (struct ntlmssp2_name *) blobptr;
363 type = le16_to_cpu(attrptr->type);
364 if (type == NTLMSSP_AV_EOL)
365 break;
366 blobptr += 2; /* advance attr type */
367 attrsize = le16_to_cpu(attrptr->length);
368 blobptr += 2; /* advance attr size */
369 if (blobptr + attrsize > blobend)
370 break;
371 if (type == NTLMSSP_AV_NB_DOMAIN_NAME) {
372 if (!attrsize)
373 break;
374 if (!ses->domainName) {
375 ses->domainName =
376 kmalloc(attrsize + 1, GFP_KERNEL);
377 if (!ses->domainName)
378 return -ENOMEM;
379 cifs_from_ucs2(ses->domainName,
380 (__le16 *)blobptr, attrsize, attrsize,
Shirish Pargaonkarf7c54452010-10-26 18:10:24 -0500381 nls_cp, false);
Shirish Pargaonkar2b149f12010-09-18 22:02:18 -0500382 break;
383 }
384 }
385 blobptr += attrsize; /* advance attr value */
386 }
387
388 return 0;
389}
390
Steve French96daf2b2011-05-27 04:34:02 +0000391static int calc_ntlmv2_hash(struct cifs_ses *ses, char *ntlmv2_hash,
Steve French50c2f752007-07-13 00:33:32 +0000392 const struct nls_table *nls_cp)
Steve Frencha8ee0342006-06-05 23:34:19 +0000393{
394 int rc = 0;
395 int len;
Shirish Pargaonkar307fbd32010-10-21 14:25:17 -0500396 char nt_hash[CIFS_NTHASH_SIZE];
Steve French50c2f752007-07-13 00:33:32 +0000397 wchar_t *user;
398 wchar_t *domain;
Shirish Pargaonkar307fbd32010-10-21 14:25:17 -0500399 wchar_t *server;
Steve Frenchc8e56f12010-09-08 21:10:58 +0000400
Shirish Pargaonkar307fbd32010-10-21 14:25:17 -0500401 if (!ses->server->secmech.sdeschmacmd5) {
402 cERROR(1, "calc_ntlmv2_hash: can't generate ntlmv2 hash\n");
403 return -1;
404 }
Steve Frencha8ee0342006-06-05 23:34:19 +0000405
406 /* calculate md4 hash of password */
407 E_md4hash(ses->password, nt_hash);
408
Shirish Pargaonkar14cae322011-06-20 16:14:03 -0500409 rc = crypto_shash_setkey(ses->server->secmech.hmacmd5, nt_hash,
Shirish Pargaonkar307fbd32010-10-21 14:25:17 -0500410 CIFS_NTHASH_SIZE);
Shirish Pargaonkar14cae322011-06-20 16:14:03 -0500411 if (rc) {
412 cERROR(1, "%s: Could not set NT Hash as a key", __func__);
413 return rc;
414 }
Shirish Pargaonkar307fbd32010-10-21 14:25:17 -0500415
416 rc = crypto_shash_init(&ses->server->secmech.sdeschmacmd5->shash);
417 if (rc) {
418 cERROR(1, "calc_ntlmv2_hash: could not init hmacmd5\n");
419 return rc;
420 }
Steve Frencha8ee0342006-06-05 23:34:19 +0000421
Steve French8727c8a2011-02-25 01:11:56 -0600422 /* convert ses->user_name to unicode and uppercase */
423 len = strlen(ses->user_name);
Steve French1717ffc2006-06-08 05:41:32 +0000424 user = kmalloc(2 + (len * 2), GFP_KERNEL);
Shirish Pargaonkar307fbd32010-10-21 14:25:17 -0500425 if (user == NULL) {
426 cERROR(1, "calc_ntlmv2_hash: user mem alloc failure\n");
427 rc = -ENOMEM;
Shirish Pargaonkar14cae322011-06-20 16:14:03 -0500428 return rc;
Shirish Pargaonkar307fbd32010-10-21 14:25:17 -0500429 }
Steve French8727c8a2011-02-25 01:11:56 -0600430 len = cifs_strtoUCS((__le16 *)user, ses->user_name, len, nls_cp);
Steve French1717ffc2006-06-08 05:41:32 +0000431 UniStrupr(user);
Shirish Pargaonkar307fbd32010-10-21 14:25:17 -0500432
Shirish Pargaonkar14cae322011-06-20 16:14:03 -0500433 rc = crypto_shash_update(&ses->server->secmech.sdeschmacmd5->shash,
Shirish Pargaonkar307fbd32010-10-21 14:25:17 -0500434 (char *)user, 2 * len);
Shirish Pargaonkar14cae322011-06-20 16:14:03 -0500435 kfree(user);
436 if (rc) {
437 cERROR(1, "%s: Could not update with user\n", __func__);
438 return rc;
439 }
Steve Frencha8ee0342006-06-05 23:34:19 +0000440
441 /* convert ses->domainName to unicode and uppercase */
Steve French50c2f752007-07-13 00:33:32 +0000442 if (ses->domainName) {
Steve French1717ffc2006-06-08 05:41:32 +0000443 len = strlen(ses->domainName);
Steve Frencha8ee0342006-06-05 23:34:19 +0000444
Steve French50c2f752007-07-13 00:33:32 +0000445 domain = kmalloc(2 + (len * 2), GFP_KERNEL);
Shirish Pargaonkar307fbd32010-10-21 14:25:17 -0500446 if (domain == NULL) {
447 cERROR(1, "calc_ntlmv2_hash: domain mem alloc failure");
448 rc = -ENOMEM;
Shirish Pargaonkar14cae322011-06-20 16:14:03 -0500449 return rc;
Shirish Pargaonkar307fbd32010-10-21 14:25:17 -0500450 }
Cyril Gorcunov8f2376a2007-10-14 17:58:43 +0000451 len = cifs_strtoUCS((__le16 *)domain, ses->domainName, len,
452 nls_cp);
Shirish Pargaonkar14cae322011-06-20 16:14:03 -0500453 rc =
Shirish Pargaonkar307fbd32010-10-21 14:25:17 -0500454 crypto_shash_update(&ses->server->secmech.sdeschmacmd5->shash,
455 (char *)domain, 2 * len);
Steve French1717ffc2006-06-08 05:41:32 +0000456 kfree(domain);
Shirish Pargaonkar14cae322011-06-20 16:14:03 -0500457 if (rc) {
458 cERROR(1, "%s: Could not update with domain\n",
459 __func__);
460 return rc;
461 }
Shirish Pargaonkar307fbd32010-10-21 14:25:17 -0500462 } else if (ses->serverName) {
463 len = strlen(ses->serverName);
464
465 server = kmalloc(2 + (len * 2), GFP_KERNEL);
466 if (server == NULL) {
467 cERROR(1, "calc_ntlmv2_hash: server mem alloc failure");
468 rc = -ENOMEM;
Shirish Pargaonkar14cae322011-06-20 16:14:03 -0500469 return rc;
Shirish Pargaonkar307fbd32010-10-21 14:25:17 -0500470 }
471 len = cifs_strtoUCS((__le16 *)server, ses->serverName, len,
472 nls_cp);
Shirish Pargaonkar14cae322011-06-20 16:14:03 -0500473 rc =
Shirish Pargaonkar307fbd32010-10-21 14:25:17 -0500474 crypto_shash_update(&ses->server->secmech.sdeschmacmd5->shash,
475 (char *)server, 2 * len);
476 kfree(server);
Shirish Pargaonkar14cae322011-06-20 16:14:03 -0500477 if (rc) {
478 cERROR(1, "%s: Could not update with server\n",
479 __func__);
480 return rc;
481 }
Steve French1717ffc2006-06-08 05:41:32 +0000482 }
Shirish Pargaonkar307fbd32010-10-21 14:25:17 -0500483
484 rc = crypto_shash_final(&ses->server->secmech.sdeschmacmd5->shash,
Shirish Pargaonkard3686d52010-10-28 09:53:07 -0500485 ntlmv2_hash);
Shirish Pargaonkar14cae322011-06-20 16:14:03 -0500486 if (rc)
487 cERROR(1, "%s: Could not generate md5 hash\n", __func__);
Shirish Pargaonkar307fbd32010-10-21 14:25:17 -0500488
Steve Frencha8ee0342006-06-05 23:34:19 +0000489 return rc;
490}
491
Shirish Pargaonkar307fbd32010-10-21 14:25:17 -0500492static int
Steve French96daf2b2011-05-27 04:34:02 +0000493CalcNTLMv2_response(const struct cifs_ses *ses, char *ntlmv2_hash)
Shirish Pargaonkar307fbd32010-10-21 14:25:17 -0500494{
495 int rc;
496 unsigned int offset = CIFS_SESS_KEY_SIZE + 8;
497
498 if (!ses->server->secmech.sdeschmacmd5) {
499 cERROR(1, "calc_ntlmv2_hash: can't generate ntlmv2 hash\n");
500 return -1;
501 }
502
Shirish Pargaonkar14cae322011-06-20 16:14:03 -0500503 rc = crypto_shash_setkey(ses->server->secmech.hmacmd5,
Shirish Pargaonkard3686d52010-10-28 09:53:07 -0500504 ntlmv2_hash, CIFS_HMAC_MD5_HASH_SIZE);
Shirish Pargaonkar14cae322011-06-20 16:14:03 -0500505 if (rc) {
506 cERROR(1, "%s: Could not set NTLMV2 Hash as a key", __func__);
507 return rc;
508 }
Shirish Pargaonkar307fbd32010-10-21 14:25:17 -0500509
510 rc = crypto_shash_init(&ses->server->secmech.sdeschmacmd5->shash);
511 if (rc) {
512 cERROR(1, "CalcNTLMv2_response: could not init hmacmd5");
513 return rc;
514 }
515
Shirish Pargaonkard3ba50b2010-10-27 15:20:36 -0500516 if (ses->server->secType == RawNTLMSSP)
517 memcpy(ses->auth_key.response + offset,
Shirish Pargaonkard3686d52010-10-28 09:53:07 -0500518 ses->ntlmssp->cryptkey, CIFS_SERVER_CHALLENGE_SIZE);
Shirish Pargaonkard3ba50b2010-10-27 15:20:36 -0500519 else
520 memcpy(ses->auth_key.response + offset,
521 ses->server->cryptkey, CIFS_SERVER_CHALLENGE_SIZE);
Shirish Pargaonkar14cae322011-06-20 16:14:03 -0500522 rc = crypto_shash_update(&ses->server->secmech.sdeschmacmd5->shash,
Shirish Pargaonkar307fbd32010-10-21 14:25:17 -0500523 ses->auth_key.response + offset, ses->auth_key.len - offset);
Shirish Pargaonkar14cae322011-06-20 16:14:03 -0500524 if (rc) {
525 cERROR(1, "%s: Could not update with response\n", __func__);
526 return rc;
527 }
Shirish Pargaonkar307fbd32010-10-21 14:25:17 -0500528
529 rc = crypto_shash_final(&ses->server->secmech.sdeschmacmd5->shash,
530 ses->auth_key.response + CIFS_SESS_KEY_SIZE);
Shirish Pargaonkar14cae322011-06-20 16:14:03 -0500531 if (rc)
532 cERROR(1, "%s: Could not generate md5 hash\n", __func__);
Shirish Pargaonkar307fbd32010-10-21 14:25:17 -0500533
534 return rc;
535}
536
537
Shirish Pargaonkar2b149f12010-09-18 22:02:18 -0500538int
Steve French96daf2b2011-05-27 04:34:02 +0000539setup_ntlmv2_rsp(struct cifs_ses *ses, const struct nls_table *nls_cp)
Steve French9fbc5902010-08-20 20:42:26 +0000540{
Steve Frenchc8e56f12010-09-08 21:10:58 +0000541 int rc;
Shirish Pargaonkar21e73392010-10-21 06:42:55 -0500542 int baselen;
Shirish Pargaonkard3686d52010-10-28 09:53:07 -0500543 unsigned int tilen;
Shirish Pargaonkar21e73392010-10-21 06:42:55 -0500544 struct ntlmv2_resp *buf;
Shirish Pargaonkard3686d52010-10-28 09:53:07 -0500545 char ntlmv2_hash[16];
546 unsigned char *tiblob = NULL; /* target info blob */
Steve French6d027cf2006-06-05 16:26:05 +0000547
Shirish Pargaonkar2b149f12010-09-18 22:02:18 -0500548 if (ses->server->secType == RawNTLMSSP) {
549 if (!ses->domainName) {
Shirish Pargaonkarf7c54452010-10-26 18:10:24 -0500550 rc = find_domain_name(ses, nls_cp);
Shirish Pargaonkar2b149f12010-09-18 22:02:18 -0500551 if (rc) {
552 cERROR(1, "error %d finding domain name", rc);
553 goto setup_ntlmv2_rsp_ret;
554 }
555 }
556 } else {
Shirish Pargaonkar9daa42e2010-10-10 13:21:05 -0500557 rc = build_avpair_blob(ses, nls_cp);
Shirish Pargaonkar2b149f12010-09-18 22:02:18 -0500558 if (rc) {
559 cERROR(1, "error %d building av pair blob", rc);
Shirish Pargaonkard3686d52010-10-28 09:53:07 -0500560 goto setup_ntlmv2_rsp_ret;
Shirish Pargaonkar2b149f12010-09-18 22:02:18 -0500561 }
562 }
Steve Frencha8ee0342006-06-05 23:34:19 +0000563
Shirish Pargaonkar21e73392010-10-21 06:42:55 -0500564 baselen = CIFS_SESS_KEY_SIZE + sizeof(struct ntlmv2_resp);
Shirish Pargaonkard3686d52010-10-28 09:53:07 -0500565 tilen = ses->auth_key.len;
566 tiblob = ses->auth_key.response;
567
568 ses->auth_key.response = kmalloc(baselen + tilen, GFP_KERNEL);
Shirish Pargaonkar21e73392010-10-21 06:42:55 -0500569 if (!ses->auth_key.response) {
570 rc = ENOMEM;
Shirish Pargaonkard3686d52010-10-28 09:53:07 -0500571 ses->auth_key.len = 0;
Shirish Pargaonkar21e73392010-10-21 06:42:55 -0500572 cERROR(1, "%s: Can't allocate auth blob", __func__);
573 goto setup_ntlmv2_rsp_ret;
574 }
Shirish Pargaonkard3686d52010-10-28 09:53:07 -0500575 ses->auth_key.len += baselen;
Shirish Pargaonkar21e73392010-10-21 06:42:55 -0500576
577 buf = (struct ntlmv2_resp *)
578 (ses->auth_key.response + CIFS_SESS_KEY_SIZE);
579 buf->blob_signature = cpu_to_le32(0x00000101);
580 buf->reserved = 0;
581 buf->time = cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME));
582 get_random_bytes(&buf->client_chal, sizeof(buf->client_chal));
583 buf->reserved2 = 0;
584
Shirish Pargaonkard3686d52010-10-28 09:53:07 -0500585 memcpy(ses->auth_key.response + baselen, tiblob, tilen);
Shirish Pargaonkar21e73392010-10-21 06:42:55 -0500586
Shirish Pargaonkarf7c54452010-10-26 18:10:24 -0500587 /* calculate ntlmv2_hash */
Shirish Pargaonkard3686d52010-10-28 09:53:07 -0500588 rc = calc_ntlmv2_hash(ses, ntlmv2_hash, nls_cp);
Shirish Pargaonkar2b149f12010-09-18 22:02:18 -0500589 if (rc) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000590 cERROR(1, "could not get v2 hash rc %d", rc);
Shirish Pargaonkar2b149f12010-09-18 22:02:18 -0500591 goto setup_ntlmv2_rsp_ret;
592 }
Shirish Pargaonkarf7c54452010-10-26 18:10:24 -0500593
594 /* calculate first part of the client response (CR1) */
Shirish Pargaonkard3686d52010-10-28 09:53:07 -0500595 rc = CalcNTLMv2_response(ses, ntlmv2_hash);
Shirish Pargaonkar307fbd32010-10-21 14:25:17 -0500596 if (rc) {
597 cERROR(1, "Could not calculate CR1 rc: %d", rc);
598 goto setup_ntlmv2_rsp_ret;
599 }
Steve Frenchb609f062007-07-09 07:55:14 +0000600
Shirish Pargaonkar5d0d2882010-10-13 18:15:00 -0500601 /* now calculate the session key for NTLMv2 */
Shirish Pargaonkar14cae322011-06-20 16:14:03 -0500602 rc = crypto_shash_setkey(ses->server->secmech.hmacmd5,
Shirish Pargaonkard3686d52010-10-28 09:53:07 -0500603 ntlmv2_hash, CIFS_HMAC_MD5_HASH_SIZE);
Shirish Pargaonkar14cae322011-06-20 16:14:03 -0500604 if (rc) {
605 cERROR(1, "%s: Could not set NTLMV2 Hash as a key", __func__);
606 goto setup_ntlmv2_rsp_ret;
607 }
Shirish Pargaonkar307fbd32010-10-21 14:25:17 -0500608
609 rc = crypto_shash_init(&ses->server->secmech.sdeschmacmd5->shash);
610 if (rc) {
611 cERROR(1, "%s: Could not init hmacmd5\n", __func__);
612 goto setup_ntlmv2_rsp_ret;
613 }
614
Shirish Pargaonkar14cae322011-06-20 16:14:03 -0500615 rc = crypto_shash_update(&ses->server->secmech.sdeschmacmd5->shash,
Shirish Pargaonkar307fbd32010-10-21 14:25:17 -0500616 ses->auth_key.response + CIFS_SESS_KEY_SIZE,
617 CIFS_HMAC_MD5_HASH_SIZE);
Shirish Pargaonkar14cae322011-06-20 16:14:03 -0500618 if (rc) {
619 cERROR(1, "%s: Could not update with response\n", __func__);
620 goto setup_ntlmv2_rsp_ret;
621 }
Shirish Pargaonkar307fbd32010-10-21 14:25:17 -0500622
623 rc = crypto_shash_final(&ses->server->secmech.sdeschmacmd5->shash,
624 ses->auth_key.response);
Shirish Pargaonkar14cae322011-06-20 16:14:03 -0500625 if (rc)
626 cERROR(1, "%s: Could not generate md5 hash\n", __func__);
Shirish Pargaonkar2b149f12010-09-18 22:02:18 -0500627
Shirish Pargaonkar2b149f12010-09-18 22:02:18 -0500628setup_ntlmv2_rsp_ret:
Shirish Pargaonkard3686d52010-10-28 09:53:07 -0500629 kfree(tiblob);
Shirish Pargaonkar2b149f12010-09-18 22:02:18 -0500630
631 return rc;
Steve French6d027cf2006-06-05 16:26:05 +0000632}
633
Shirish Pargaonkard2b91522010-10-21 14:25:08 -0500634int
Steve French96daf2b2011-05-27 04:34:02 +0000635calc_seckey(struct cifs_ses *ses)
Shirish Pargaonkard2b91522010-10-21 14:25:08 -0500636{
637 int rc;
638 struct crypto_blkcipher *tfm_arc4;
639 struct scatterlist sgin, sgout;
640 struct blkcipher_desc desc;
641 unsigned char sec_key[CIFS_SESS_KEY_SIZE]; /* a nonce */
642
643 get_random_bytes(sec_key, CIFS_SESS_KEY_SIZE);
644
645 tfm_arc4 = crypto_alloc_blkcipher("ecb(arc4)", 0, CRYPTO_ALG_ASYNC);
Shirish Pargaonkar7a8587e2011-01-29 13:54:58 -0600646 if (IS_ERR(tfm_arc4)) {
647 rc = PTR_ERR(tfm_arc4);
Shirish Pargaonkard2b91522010-10-21 14:25:08 -0500648 cERROR(1, "could not allocate crypto API arc4\n");
Shirish Pargaonkar7a8587e2011-01-29 13:54:58 -0600649 return rc;
Shirish Pargaonkard2b91522010-10-21 14:25:08 -0500650 }
651
652 desc.tfm = tfm_arc4;
653
Shirish Pargaonkar14cae322011-06-20 16:14:03 -0500654 rc = crypto_blkcipher_setkey(tfm_arc4, ses->auth_key.response,
Shirish Pargaonkard2b91522010-10-21 14:25:08 -0500655 CIFS_SESS_KEY_SIZE);
Shirish Pargaonkar14cae322011-06-20 16:14:03 -0500656 if (rc) {
657 cERROR(1, "%s: Could not set response as a key", __func__);
658 return rc;
659 }
Shirish Pargaonkard2b91522010-10-21 14:25:08 -0500660
661 sg_init_one(&sgin, sec_key, CIFS_SESS_KEY_SIZE);
Shirish Pargaonkard3686d52010-10-28 09:53:07 -0500662 sg_init_one(&sgout, ses->ntlmssp->ciphertext, CIFS_CPHTXT_SIZE);
Shirish Pargaonkard2b91522010-10-21 14:25:08 -0500663
664 rc = crypto_blkcipher_encrypt(&desc, &sgout, &sgin, CIFS_CPHTXT_SIZE);
665 if (rc) {
666 cERROR(1, "could not encrypt session key rc: %d\n", rc);
667 crypto_free_blkcipher(tfm_arc4);
668 return rc;
669 }
670
671 /* make secondary_key/nonce as session key */
672 memcpy(ses->auth_key.response, sec_key, CIFS_SESS_KEY_SIZE);
673 /* and make len as that of session key only */
674 ses->auth_key.len = CIFS_SESS_KEY_SIZE;
675
676 crypto_free_blkcipher(tfm_arc4);
677
Shirish Pargaonkar14cae322011-06-20 16:14:03 -0500678 return rc;
Shirish Pargaonkard2b91522010-10-21 14:25:08 -0500679}
680
681void
682cifs_crypto_shash_release(struct TCP_Server_Info *server)
683{
684 if (server->secmech.md5)
685 crypto_free_shash(server->secmech.md5);
686
687 if (server->secmech.hmacmd5)
688 crypto_free_shash(server->secmech.hmacmd5);
689
690 kfree(server->secmech.sdeschmacmd5);
691
692 kfree(server->secmech.sdescmd5);
693}
694
695int
696cifs_crypto_shash_allocate(struct TCP_Server_Info *server)
697{
698 int rc;
699 unsigned int size;
700
701 server->secmech.hmacmd5 = crypto_alloc_shash("hmac(md5)", 0, 0);
Shirish Pargaonkaree2c9252011-01-27 09:58:04 -0600702 if (IS_ERR(server->secmech.hmacmd5)) {
Shirish Pargaonkard2b91522010-10-21 14:25:08 -0500703 cERROR(1, "could not allocate crypto hmacmd5\n");
704 return PTR_ERR(server->secmech.hmacmd5);
705 }
706
707 server->secmech.md5 = crypto_alloc_shash("md5", 0, 0);
Shirish Pargaonkaree2c9252011-01-27 09:58:04 -0600708 if (IS_ERR(server->secmech.md5)) {
Shirish Pargaonkard2b91522010-10-21 14:25:08 -0500709 cERROR(1, "could not allocate crypto md5\n");
710 rc = PTR_ERR(server->secmech.md5);
711 goto crypto_allocate_md5_fail;
712 }
713
714 size = sizeof(struct shash_desc) +
715 crypto_shash_descsize(server->secmech.hmacmd5);
716 server->secmech.sdeschmacmd5 = kmalloc(size, GFP_KERNEL);
717 if (!server->secmech.sdeschmacmd5) {
718 cERROR(1, "cifs_crypto_shash_allocate: can't alloc hmacmd5\n");
719 rc = -ENOMEM;
720 goto crypto_allocate_hmacmd5_sdesc_fail;
721 }
722 server->secmech.sdeschmacmd5->shash.tfm = server->secmech.hmacmd5;
723 server->secmech.sdeschmacmd5->shash.flags = 0x0;
724
725
726 size = sizeof(struct shash_desc) +
727 crypto_shash_descsize(server->secmech.md5);
728 server->secmech.sdescmd5 = kmalloc(size, GFP_KERNEL);
729 if (!server->secmech.sdescmd5) {
730 cERROR(1, "cifs_crypto_shash_allocate: can't alloc md5\n");
731 rc = -ENOMEM;
732 goto crypto_allocate_md5_sdesc_fail;
733 }
734 server->secmech.sdescmd5->shash.tfm = server->secmech.md5;
735 server->secmech.sdescmd5->shash.flags = 0x0;
736
737 return 0;
738
739crypto_allocate_md5_sdesc_fail:
740 kfree(server->secmech.sdeschmacmd5);
741
742crypto_allocate_hmacmd5_sdesc_fail:
743 crypto_free_shash(server->secmech.md5);
744
745crypto_allocate_md5_fail:
746 crypto_free_shash(server->secmech.hmacmd5);
747
748 return rc;
749}