blob: 847628dfdc44fa95c5c0ea232b8b28ccb03347e3 [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"
27#include "md5.h"
28#include "cifs_unicode.h"
29#include "cifsproto.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
Steve Frenchffdd6e42007-06-24 21:15:44 +000033/* Calculate and return the CIFS signature based on the mac key and SMB PDU */
Linus Torvalds1da177e2005-04-16 15:20:36 -070034/* the 16 byte signature must be allocated by the caller */
35/* Note we only use the 1st eight bytes */
Steve Frenchffdd6e42007-06-24 21:15:44 +000036/* Note that the smb header signature field on input contains the
Linus Torvalds1da177e2005-04-16 15:20:36 -070037 sequence number before this function is called */
38
39extern void mdfour(unsigned char *out, unsigned char *in, int n);
40extern void E_md4hash(const unsigned char *passwd, unsigned char *p16);
Jeff Layton4e53a3f2008-12-05 20:41:21 -050041extern void SMBencrypt(unsigned char *passwd, const unsigned char *c8,
Steve Frenchffdd6e42007-06-24 21:15:44 +000042 unsigned char *p24);
Steve French50c2f752007-07-13 00:33:32 +000043
Steve Frenchffdd6e42007-06-24 21:15:44 +000044static int cifs_calculate_signature(const struct smb_hdr *cifs_pdu,
Steve Frenchb609f062007-07-09 07:55:14 +000045 const struct mac_key *key, char *signature)
Linus Torvalds1da177e2005-04-16 15:20:36 -070046{
47 struct MD5Context context;
48
Steve Frenchb609f062007-07-09 07:55:14 +000049 if ((cifs_pdu == NULL) || (signature == NULL) || (key == NULL))
Linus Torvalds1da177e2005-04-16 15:20:36 -070050 return -EINVAL;
51
Steve French6a7f8d32009-01-12 21:03:25 +000052 cifs_MD5_init(&context);
53 cifs_MD5_update(&context, (char *)&key->data, key->len);
54 cifs_MD5_update(&context, cifs_pdu->Protocol, cifs_pdu->smb_buf_length);
Steve Frenchb609f062007-07-09 07:55:14 +000055
Steve French6a7f8d32009-01-12 21:03:25 +000056 cifs_MD5_final(signature, &context);
Linus Torvalds1da177e2005-04-16 15:20:36 -070057 return 0;
58}
59
Steve Frenchffdd6e42007-06-24 21:15:44 +000060int cifs_sign_smb(struct smb_hdr *cifs_pdu, struct TCP_Server_Info *server,
61 __u32 *pexpected_response_sequence_number)
Linus Torvalds1da177e2005-04-16 15:20:36 -070062{
63 int rc = 0;
64 char smb_signature[20];
65
Steve Frenchffdd6e42007-06-24 21:15:44 +000066 if ((cifs_pdu == NULL) || (server == NULL))
Linus Torvalds1da177e2005-04-16 15:20:36 -070067 return -EINVAL;
68
Steve Frenchffdd6e42007-06-24 21:15:44 +000069 if ((cifs_pdu->Flags2 & SMBFLG2_SECURITY_SIGNATURE) == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -070070 return rc;
71
72 spin_lock(&GlobalMid_Lock);
Steve French50c2f752007-07-13 00:33:32 +000073 cifs_pdu->Signature.Sequence.SequenceNumber =
74 cpu_to_le32(server->sequence_number);
Linus Torvalds1da177e2005-04-16 15:20:36 -070075 cifs_pdu->Signature.Sequence.Reserved = 0;
Steve French50c2f752007-07-13 00:33:32 +000076
Steve Frenchad009ac2005-04-28 22:41:05 -070077 *pexpected_response_sequence_number = server->sequence_number++;
78 server->sequence_number++;
Linus Torvalds1da177e2005-04-16 15:20:36 -070079 spin_unlock(&GlobalMid_Lock);
80
Steve Frenchb609f062007-07-09 07:55:14 +000081 rc = cifs_calculate_signature(cifs_pdu, &server->mac_signing_key,
Steve Frenchffdd6e42007-06-24 21:15:44 +000082 smb_signature);
83 if (rc)
Linus Torvalds1da177e2005-04-16 15:20:36 -070084 memset(cifs_pdu->Signature.SecuritySignature, 0, 8);
85 else
86 memcpy(cifs_pdu->Signature.SecuritySignature, smb_signature, 8);
87
88 return rc;
89}
90
Steve Frenchffdd6e42007-06-24 21:15:44 +000091static int cifs_calc_signature2(const struct kvec *iov, int n_vec,
Steve Frenchb609f062007-07-09 07:55:14 +000092 const struct mac_key *key, char *signature)
Steve French84afc292005-12-02 13:32:45 -080093{
Steve Frenche9917a02006-03-31 21:22:00 +000094 struct MD5Context context;
95 int i;
Steve French84afc292005-12-02 13:32:45 -080096
Steve Frenchb609f062007-07-09 07:55:14 +000097 if ((iov == NULL) || (signature == NULL) || (key == NULL))
Steve Frenche9917a02006-03-31 21:22:00 +000098 return -EINVAL;
Steve French84afc292005-12-02 13:32:45 -080099
Steve French6a7f8d32009-01-12 21:03:25 +0000100 cifs_MD5_init(&context);
101 cifs_MD5_update(&context, (char *)&key->data, key->len);
Steve French50c2f752007-07-13 00:33:32 +0000102 for (i = 0; i < n_vec; i++) {
Jeff Layton745542e2007-11-03 04:34:04 +0000103 if (iov[i].iov_len == 0)
104 continue;
Steve Frenchffdd6e42007-06-24 21:15:44 +0000105 if (iov[i].iov_base == NULL) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000106 cERROR(1, "null iovec entry");
Steve Frenche9917a02006-03-31 21:22:00 +0000107 return -EIO;
Jeff Layton745542e2007-11-03 04:34:04 +0000108 }
Steve Frenchffdd6e42007-06-24 21:15:44 +0000109 /* The first entry includes a length field (which does not get
Steve Frenche9917a02006-03-31 21:22:00 +0000110 signed that occupies the first 4 bytes before the header */
Steve Frenchffdd6e42007-06-24 21:15:44 +0000111 if (i == 0) {
Steve French63d25832007-11-05 21:46:10 +0000112 if (iov[0].iov_len <= 8) /* cmd field at offset 9 */
Steve Frenche9917a02006-03-31 21:22:00 +0000113 break; /* nothing to sign or corrupt header */
Steve French6a7f8d32009-01-12 21:03:25 +0000114 cifs_MD5_update(&context, iov[0].iov_base+4,
Steve French63135e02007-07-17 17:34:02 +0000115 iov[0].iov_len-4);
Steve Frenche9917a02006-03-31 21:22:00 +0000116 } else
Steve French6a7f8d32009-01-12 21:03:25 +0000117 cifs_MD5_update(&context, iov[i].iov_base, iov[i].iov_len);
Steve Frenche9917a02006-03-31 21:22:00 +0000118 }
Steve French84afc292005-12-02 13:32:45 -0800119
Steve French6a7f8d32009-01-12 21:03:25 +0000120 cifs_MD5_final(signature, &context);
Steve French84afc292005-12-02 13:32:45 -0800121
Steve Frenche9917a02006-03-31 21:22:00 +0000122 return 0;
Steve French84afc292005-12-02 13:32:45 -0800123}
124
125
Steve Frenchffdd6e42007-06-24 21:15:44 +0000126int cifs_sign_smb2(struct kvec *iov, int n_vec, struct TCP_Server_Info *server,
Steve French63d25832007-11-05 21:46:10 +0000127 __u32 *pexpected_response_sequence_number)
Steve French84afc292005-12-02 13:32:45 -0800128{
129 int rc = 0;
130 char smb_signature[20];
Steve Frenchffdd6e42007-06-24 21:15:44 +0000131 struct smb_hdr *cifs_pdu = iov[0].iov_base;
Steve French84afc292005-12-02 13:32:45 -0800132
Steve Frenchffdd6e42007-06-24 21:15:44 +0000133 if ((cifs_pdu == NULL) || (server == NULL))
Steve French84afc292005-12-02 13:32:45 -0800134 return -EINVAL;
135
Steve Frenchffdd6e42007-06-24 21:15:44 +0000136 if ((cifs_pdu->Flags2 & SMBFLG2_SECURITY_SIGNATURE) == 0)
Steve French84afc292005-12-02 13:32:45 -0800137 return rc;
138
Steve Frenchffdd6e42007-06-24 21:15:44 +0000139 spin_lock(&GlobalMid_Lock);
140 cifs_pdu->Signature.Sequence.SequenceNumber =
Steve French84afc292005-12-02 13:32:45 -0800141 cpu_to_le32(server->sequence_number);
Steve Frenchffdd6e42007-06-24 21:15:44 +0000142 cifs_pdu->Signature.Sequence.Reserved = 0;
Steve French84afc292005-12-02 13:32:45 -0800143
Steve Frenchffdd6e42007-06-24 21:15:44 +0000144 *pexpected_response_sequence_number = server->sequence_number++;
145 server->sequence_number++;
146 spin_unlock(&GlobalMid_Lock);
Steve French84afc292005-12-02 13:32:45 -0800147
Steve Frenchb609f062007-07-09 07:55:14 +0000148 rc = cifs_calc_signature2(iov, n_vec, &server->mac_signing_key,
Steve French84afc292005-12-02 13:32:45 -0800149 smb_signature);
Steve Frenchffdd6e42007-06-24 21:15:44 +0000150 if (rc)
151 memset(cifs_pdu->Signature.SecuritySignature, 0, 8);
152 else
153 memcpy(cifs_pdu->Signature.SecuritySignature, smb_signature, 8);
Steve French84afc292005-12-02 13:32:45 -0800154
Steve Frenchffdd6e42007-06-24 21:15:44 +0000155 return rc;
Steve French84afc292005-12-02 13:32:45 -0800156}
157
Steve Frenchb609f062007-07-09 07:55:14 +0000158int cifs_verify_signature(struct smb_hdr *cifs_pdu,
159 const struct mac_key *mac_key,
Steve Frenchffdd6e42007-06-24 21:15:44 +0000160 __u32 expected_sequence_number)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161{
162 unsigned int rc;
163 char server_response_sig[8];
164 char what_we_think_sig_should_be[20];
165
Steve Frenchffdd6e42007-06-24 21:15:44 +0000166 if ((cifs_pdu == NULL) || (mac_key == NULL))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167 return -EINVAL;
168
169 if (cifs_pdu->Command == SMB_COM_NEGOTIATE)
170 return 0;
171
172 if (cifs_pdu->Command == SMB_COM_LOCKING_ANDX) {
Steve French50c2f752007-07-13 00:33:32 +0000173 struct smb_com_lock_req *pSMB =
Steve Frenchffdd6e42007-06-24 21:15:44 +0000174 (struct smb_com_lock_req *)cifs_pdu;
175 if (pSMB->LockType & LOCKING_ANDX_OPLOCK_RELEASE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700176 return 0;
177 }
178
Steve French50c2f752007-07-13 00:33:32 +0000179 /* BB what if signatures are supposed to be on for session but
180 server does not send one? BB */
181
Linus Torvalds1da177e2005-04-16 15:20:36 -0700182 /* Do not need to verify session setups with signature "BSRSPYL " */
Steve French50c2f752007-07-13 00:33:32 +0000183 if (memcmp(cifs_pdu->Signature.SecuritySignature, "BSRSPYL ", 8) == 0)
Joe Perchesb6b38f72010-04-21 03:50:45 +0000184 cFYI(1, "dummy signature received for smb command 0x%x",
185 cifs_pdu->Command);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186
187 /* save off the origiginal signature so we can modify the smb and check
188 its signature against what the server sent */
Steve French50c2f752007-07-13 00:33:32 +0000189 memcpy(server_response_sig, cifs_pdu->Signature.SecuritySignature, 8);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190
Steve French50c2f752007-07-13 00:33:32 +0000191 cifs_pdu->Signature.Sequence.SequenceNumber =
192 cpu_to_le32(expected_sequence_number);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193 cifs_pdu->Signature.Sequence.Reserved = 0;
194
195 rc = cifs_calculate_signature(cifs_pdu, mac_key,
196 what_we_think_sig_should_be);
197
Steve French50c2f752007-07-13 00:33:32 +0000198 if (rc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199 return rc;
200
Steve French50c2f752007-07-13 00:33:32 +0000201/* cifs_dump_mem("what we think it should be: ",
202 what_we_think_sig_should_be, 16); */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700203
Steve French50c2f752007-07-13 00:33:32 +0000204 if (memcmp(server_response_sig, what_we_think_sig_should_be, 8))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205 return -EACCES;
206 else
207 return 0;
208
209}
210
211/* We fill in key by putting in 40 byte array which was allocated by caller */
Steve Frenchb609f062007-07-09 07:55:14 +0000212int cifs_calculate_mac_key(struct mac_key *key, const char *rn,
213 const char *password)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214{
215 char temp_key[16];
216 if ((key == NULL) || (rn == NULL))
217 return -EINVAL;
218
219 E_md4hash(password, temp_key);
Steve Frenchb609f062007-07-09 07:55:14 +0000220 mdfour(key->data.ntlm, temp_key, 16);
221 memcpy(key->data.ntlm+16, rn, CIFS_SESS_KEY_SIZE);
222 key->len = 40;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223 return 0;
224}
225
Steve French50c2f752007-07-13 00:33:32 +0000226int CalcNTLMv2_partial_mac_key(struct cifsSesInfo *ses,
227 const struct nls_table *nls_info)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228{
229 char temp_hash[16];
230 struct HMACMD5Context ctx;
Steve French50c2f752007-07-13 00:33:32 +0000231 char *ucase_buf;
232 __le16 *unicode_buf;
233 unsigned int i, user_name_len, dom_name_len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234
Steve French50c2f752007-07-13 00:33:32 +0000235 if (ses == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700236 return -EINVAL;
237
238 E_md4hash(ses->password, temp_hash);
239
240 hmac_md5_init_limK_to_64(temp_hash, 16, &ctx);
241 user_name_len = strlen(ses->userName);
Steve French50c2f752007-07-13 00:33:32 +0000242 if (user_name_len > MAX_USERNAME_SIZE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243 return -EINVAL;
Steve French50c2f752007-07-13 00:33:32 +0000244 if (ses->domainName == NULL)
Steve French39798772006-05-31 22:40:51 +0000245 return -EINVAL; /* BB should we use CIFS_LINUX_DOM */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246 dom_name_len = strlen(ses->domainName);
Steve Frenchb609f062007-07-09 07:55:14 +0000247 if (dom_name_len > MAX_USERNAME_SIZE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700248 return -EINVAL;
Steve French50c2f752007-07-13 00:33:32 +0000249
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250 ucase_buf = kmalloc((MAX_USERNAME_SIZE+1), GFP_KERNEL);
Steve Frenchb609f062007-07-09 07:55:14 +0000251 if (ucase_buf == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700252 return -ENOMEM;
253 unicode_buf = kmalloc((MAX_USERNAME_SIZE+1)*4, GFP_KERNEL);
Steve Frenchb609f062007-07-09 07:55:14 +0000254 if (unicode_buf == NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255 kfree(ucase_buf);
256 return -ENOMEM;
257 }
Steve French50c2f752007-07-13 00:33:32 +0000258
259 for (i = 0; i < user_name_len; i++)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260 ucase_buf[i] = nls_info->charset2upper[(int)ses->userName[i]];
261 ucase_buf[i] = 0;
Steve French50c2f752007-07-13 00:33:32 +0000262 user_name_len = cifs_strtoUCS(unicode_buf, ucase_buf,
263 MAX_USERNAME_SIZE*2, nls_info);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264 unicode_buf[user_name_len] = 0;
265 user_name_len++;
266
Steve Frenchb609f062007-07-09 07:55:14 +0000267 for (i = 0; i < dom_name_len; i++)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268 ucase_buf[i] = nls_info->charset2upper[(int)ses->domainName[i]];
269 ucase_buf[i] = 0;
Steve French50c2f752007-07-13 00:33:32 +0000270 dom_name_len = cifs_strtoUCS(unicode_buf+user_name_len, ucase_buf,
271 MAX_USERNAME_SIZE*2, nls_info);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272
273 unicode_buf[user_name_len + dom_name_len] = 0;
274 hmac_md5_update((const unsigned char *) unicode_buf,
Steve Frenchb609f062007-07-09 07:55:14 +0000275 (user_name_len+dom_name_len)*2, &ctx);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700276
Steve Frenchb609f062007-07-09 07:55:14 +0000277 hmac_md5_final(ses->server->ntlmv2_hash, &ctx);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700278 kfree(ucase_buf);
279 kfree(unicode_buf);
280 return 0;
281}
Steve French7c7b25b2006-06-01 19:20:10 +0000282
283#ifdef CONFIG_CIFS_WEAK_PW_HASH
Jeff Layton4e53a3f2008-12-05 20:41:21 -0500284void calc_lanman_hash(const char *password, const char *cryptkey, bool encrypt,
285 char *lnm_session_key)
Steve French7c7b25b2006-06-01 19:20:10 +0000286{
287 int i;
288 char password_with_pad[CIFS_ENCPWD_SIZE];
289
290 memset(password_with_pad, 0, CIFS_ENCPWD_SIZE);
Jeff Layton4e53a3f2008-12-05 20:41:21 -0500291 if (password)
292 strncpy(password_with_pad, password, CIFS_ENCPWD_SIZE);
Steve French7c7b25b2006-06-01 19:20:10 +0000293
Jeff Layton04912d62010-04-24 07:57:45 -0400294 if (!encrypt && global_secflags & CIFSSEC_MAY_PLNTXT) {
Jeff Layton4e53a3f2008-12-05 20:41:21 -0500295 memset(lnm_session_key, 0, CIFS_SESS_KEY_SIZE);
296 memcpy(lnm_session_key, password_with_pad,
297 CIFS_ENCPWD_SIZE);
298 return;
299 }
Steve Frenchbdc4bf6e2006-06-02 22:57:13 +0000300
Steve French7c7b25b2006-06-01 19:20:10 +0000301 /* calculate old style session key */
302 /* calling toupper is less broken than repeatedly
303 calling nls_toupper would be since that will never
304 work for UTF8, but neither handles multibyte code pages
305 but the only alternative would be converting to UCS-16 (Unicode)
306 (using a routine something like UniStrupr) then
307 uppercasing and then converting back from Unicode - which
308 would only worth doing it if we knew it were utf8. Basically
309 utf8 and other multibyte codepages each need their own strupper
310 function since a byte at a time will ont work. */
311
Shirish Pargaonkaref571ca2008-07-24 15:56:05 +0000312 for (i = 0; i < CIFS_ENCPWD_SIZE; i++)
Steve French7c7b25b2006-06-01 19:20:10 +0000313 password_with_pad[i] = toupper(password_with_pad[i]);
Steve French7c7b25b2006-06-01 19:20:10 +0000314
Jeff Layton4e53a3f2008-12-05 20:41:21 -0500315 SMBencrypt(password_with_pad, cryptkey, lnm_session_key);
316
Steve French7c7b25b2006-06-01 19:20:10 +0000317 /* clear password before we return/free memory */
318 memset(password_with_pad, 0, CIFS_ENCPWD_SIZE);
319}
320#endif /* CIFS_WEAK_PW_HASH */
321
Steve French50c2f752007-07-13 00:33:32 +0000322static int calc_ntlmv2_hash(struct cifsSesInfo *ses,
323 const struct nls_table *nls_cp)
Steve Frencha8ee0342006-06-05 23:34:19 +0000324{
325 int rc = 0;
326 int len;
327 char nt_hash[16];
Steve French50c2f752007-07-13 00:33:32 +0000328 struct HMACMD5Context *pctxt;
329 wchar_t *user;
330 wchar_t *domain;
Steve Frencha8ee0342006-06-05 23:34:19 +0000331
332 pctxt = kmalloc(sizeof(struct HMACMD5Context), GFP_KERNEL);
333
Steve French50c2f752007-07-13 00:33:32 +0000334 if (pctxt == NULL)
Steve Frencha8ee0342006-06-05 23:34:19 +0000335 return -ENOMEM;
336
337 /* calculate md4 hash of password */
338 E_md4hash(ses->password, nt_hash);
339
Steve French1717ffc2006-06-08 05:41:32 +0000340 /* convert Domainname to unicode and uppercase */
Steve Frencha8ee0342006-06-05 23:34:19 +0000341 hmac_md5_init_limK_to_64(nt_hash, 16, pctxt);
342
343 /* convert ses->userName to unicode and uppercase */
Steve French1717ffc2006-06-08 05:41:32 +0000344 len = strlen(ses->userName);
345 user = kmalloc(2 + (len * 2), GFP_KERNEL);
Steve French50c2f752007-07-13 00:33:32 +0000346 if (user == NULL)
Steve French1717ffc2006-06-08 05:41:32 +0000347 goto calc_exit_2;
Cyril Gorcunov8f2376a2007-10-14 17:58:43 +0000348 len = cifs_strtoUCS((__le16 *)user, ses->userName, len, nls_cp);
Steve French1717ffc2006-06-08 05:41:32 +0000349 UniStrupr(user);
350 hmac_md5_update((char *)user, 2*len, pctxt);
Steve Frencha8ee0342006-06-05 23:34:19 +0000351
352 /* convert ses->domainName to unicode and uppercase */
Steve French50c2f752007-07-13 00:33:32 +0000353 if (ses->domainName) {
Steve French1717ffc2006-06-08 05:41:32 +0000354 len = strlen(ses->domainName);
Steve Frencha8ee0342006-06-05 23:34:19 +0000355
Steve French50c2f752007-07-13 00:33:32 +0000356 domain = kmalloc(2 + (len * 2), GFP_KERNEL);
357 if (domain == NULL)
Steve French1717ffc2006-06-08 05:41:32 +0000358 goto calc_exit_1;
Cyril Gorcunov8f2376a2007-10-14 17:58:43 +0000359 len = cifs_strtoUCS((__le16 *)domain, ses->domainName, len,
360 nls_cp);
Steve Frenchb609f062007-07-09 07:55:14 +0000361 /* the following line was removed since it didn't work well
362 with lower cased domain name that passed as an option.
363 Maybe converting the domain name earlier makes sense */
364 /* UniStrupr(domain); */
Steve Frencha8ee0342006-06-05 23:34:19 +0000365
Steve French1717ffc2006-06-08 05:41:32 +0000366 hmac_md5_update((char *)domain, 2*len, pctxt);
Steve French50c2f752007-07-13 00:33:32 +0000367
Steve French1717ffc2006-06-08 05:41:32 +0000368 kfree(domain);
369 }
370calc_exit_1:
371 kfree(user);
372calc_exit_2:
Steve French50c2f752007-07-13 00:33:32 +0000373 /* BB FIXME what about bytes 24 through 40 of the signing key?
Steve French1717ffc2006-06-08 05:41:32 +0000374 compare with the NTLM example */
Steve Frenchb609f062007-07-09 07:55:14 +0000375 hmac_md5_final(ses->server->ntlmv2_hash, pctxt);
Steve Frencha8ee0342006-06-05 23:34:19 +0000376
Alexander Strakh1b3859b2009-09-01 17:02:24 +0000377 kfree(pctxt);
Steve Frencha8ee0342006-06-05 23:34:19 +0000378 return rc;
379}
380
Steve French50c2f752007-07-13 00:33:32 +0000381void setup_ntlmv2_rsp(struct cifsSesInfo *ses, char *resp_buf,
382 const struct nls_table *nls_cp)
Steve French6d027cf2006-06-05 16:26:05 +0000383{
Steve Frencha8ee0342006-06-05 23:34:19 +0000384 int rc;
Steve French50c2f752007-07-13 00:33:32 +0000385 struct ntlmv2_resp *buf = (struct ntlmv2_resp *)resp_buf;
Steve Frenchb609f062007-07-09 07:55:14 +0000386 struct HMACMD5Context context;
Steve French6d027cf2006-06-05 16:26:05 +0000387
388 buf->blob_signature = cpu_to_le32(0x00000101);
389 buf->reserved = 0;
390 buf->time = cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME));
Steve French1717ffc2006-06-08 05:41:32 +0000391 get_random_bytes(&buf->client_chal, sizeof(buf->client_chal));
Steve French6d027cf2006-06-05 16:26:05 +0000392 buf->reserved2 = 0;
Steve French33ec32f2006-12-08 04:14:28 +0000393 buf->names[0].type = cpu_to_le16(NTLMSSP_DOMAIN_TYPE);
Steve French6d027cf2006-06-05 16:26:05 +0000394 buf->names[0].length = 0;
Steve French33ec32f2006-12-08 04:14:28 +0000395 buf->names[1].type = 0;
396 buf->names[1].length = 0;
Steve Frencha8ee0342006-06-05 23:34:19 +0000397
Steve French6d027cf2006-06-05 16:26:05 +0000398 /* calculate buf->ntlmv2_hash */
Steve French1717ffc2006-06-08 05:41:32 +0000399 rc = calc_ntlmv2_hash(ses, nls_cp);
Steve French50c2f752007-07-13 00:33:32 +0000400 if (rc)
Joe Perchesb6b38f72010-04-21 03:50:45 +0000401 cERROR(1, "could not get v2 hash rc %d", rc);
Steve French1717ffc2006-06-08 05:41:32 +0000402 CalcNTLMv2_response(ses, resp_buf);
Steve Frenchb609f062007-07-09 07:55:14 +0000403
404 /* now calculate the MAC key for NTLMv2 */
405 hmac_md5_init_limK_to_64(ses->server->ntlmv2_hash, 16, &context);
406 hmac_md5_update(resp_buf, 16, &context);
407 hmac_md5_final(ses->server->mac_signing_key.data.ntlmv2.key, &context);
408
409 memcpy(&ses->server->mac_signing_key.data.ntlmv2.resp, resp_buf,
410 sizeof(struct ntlmv2_resp));
411 ses->server->mac_signing_key.len = 16 + sizeof(struct ntlmv2_resp);
Steve French6d027cf2006-06-05 16:26:05 +0000412}
413
Steve French50c2f752007-07-13 00:33:32 +0000414void CalcNTLMv2_response(const struct cifsSesInfo *ses,
415 char *v2_session_response)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700416{
417 struct HMACMD5Context context;
Steve French1717ffc2006-06-08 05:41:32 +0000418 /* rest of v2 struct already generated */
Steve French50c2f752007-07-13 00:33:32 +0000419 memcpy(v2_session_response + 8, ses->server->cryptKey, 8);
Steve Frenchb609f062007-07-09 07:55:14 +0000420 hmac_md5_init_limK_to_64(ses->server->ntlmv2_hash, 16, &context);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700421
Steve Frenchb609f062007-07-09 07:55:14 +0000422 hmac_md5_update(v2_session_response+8,
Steve French1717ffc2006-06-08 05:41:32 +0000423 sizeof(struct ntlmv2_resp) - 8, &context);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424
Steve French50c2f752007-07-13 00:33:32 +0000425 hmac_md5_final(v2_session_response, &context);
Steve French1717ffc2006-06-08 05:41:32 +0000426/* cifs_dump_mem("v2_sess_rsp: ", v2_session_response, 32); */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700427}