blob: 36272293027d41902231b0725aba64ba680e49dc [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>
23#include "cifspdu.h"
Steve Frenchffdd6e42007-06-24 21:15:44 +000024#include "cifsglob.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070025#include "cifs_debug.h"
26#include "md5.h"
27#include "cifs_unicode.h"
28#include "cifsproto.h"
Steve French7c7b25b2006-06-01 19:20:10 +000029#include <linux/ctype.h>
Steve French6d027cf2006-06-05 16:26:05 +000030#include <linux/random.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070031
Steve Frenchffdd6e42007-06-24 21:15:44 +000032/* Calculate and return the CIFS signature based on the mac key and SMB PDU */
Linus Torvalds1da177e2005-04-16 15:20:36 -070033/* the 16 byte signature must be allocated by the caller */
34/* Note we only use the 1st eight bytes */
Steve Frenchffdd6e42007-06-24 21:15:44 +000035/* Note that the smb header signature field on input contains the
Linus Torvalds1da177e2005-04-16 15:20:36 -070036 sequence number before this function is called */
37
38extern void mdfour(unsigned char *out, unsigned char *in, int n);
39extern void E_md4hash(const unsigned char *passwd, unsigned char *p16);
Steve French7c7b25b2006-06-01 19:20:10 +000040extern void SMBencrypt(unsigned char *passwd, unsigned char *c8,
Steve Frenchffdd6e42007-06-24 21:15:44 +000041 unsigned char *p24);
Steve French50c2f752007-07-13 00:33:32 +000042
Steve Frenchffdd6e42007-06-24 21:15:44 +000043static int cifs_calculate_signature(const struct smb_hdr *cifs_pdu,
Steve Frenchb609f062007-07-09 07:55:14 +000044 const struct mac_key *key, char *signature)
Linus Torvalds1da177e2005-04-16 15:20:36 -070045{
46 struct MD5Context context;
47
Steve Frenchb609f062007-07-09 07:55:14 +000048 if ((cifs_pdu == NULL) || (signature == NULL) || (key == NULL))
Linus Torvalds1da177e2005-04-16 15:20:36 -070049 return -EINVAL;
50
51 MD5Init(&context);
Steve Frenchb609f062007-07-09 07:55:14 +000052 MD5Update(&context, (char *)&key->data, key->len);
Steve Frenchffdd6e42007-06-24 21:15:44 +000053 MD5Update(&context, cifs_pdu->Protocol, cifs_pdu->smb_buf_length);
Steve Frenchb609f062007-07-09 07:55:14 +000054
Steve Frenchffdd6e42007-06-24 21:15:44 +000055 MD5Final(signature, &context);
Linus Torvalds1da177e2005-04-16 15:20:36 -070056 return 0;
57}
58
Steve Frenchffdd6e42007-06-24 21:15:44 +000059int cifs_sign_smb(struct smb_hdr *cifs_pdu, struct TCP_Server_Info *server,
60 __u32 *pexpected_response_sequence_number)
Linus Torvalds1da177e2005-04-16 15:20:36 -070061{
62 int rc = 0;
63 char smb_signature[20];
64
Steve Frenchffdd6e42007-06-24 21:15:44 +000065 if ((cifs_pdu == NULL) || (server == NULL))
Linus Torvalds1da177e2005-04-16 15:20:36 -070066 return -EINVAL;
67
Steve Frenchffdd6e42007-06-24 21:15:44 +000068 if ((cifs_pdu->Flags2 & SMBFLG2_SECURITY_SIGNATURE) == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -070069 return rc;
70
71 spin_lock(&GlobalMid_Lock);
Steve French50c2f752007-07-13 00:33:32 +000072 cifs_pdu->Signature.Sequence.SequenceNumber =
73 cpu_to_le32(server->sequence_number);
Linus Torvalds1da177e2005-04-16 15:20:36 -070074 cifs_pdu->Signature.Sequence.Reserved = 0;
Steve French50c2f752007-07-13 00:33:32 +000075
Steve Frenchad009ac2005-04-28 22:41:05 -070076 *pexpected_response_sequence_number = server->sequence_number++;
77 server->sequence_number++;
Linus Torvalds1da177e2005-04-16 15:20:36 -070078 spin_unlock(&GlobalMid_Lock);
79
Steve Frenchb609f062007-07-09 07:55:14 +000080 rc = cifs_calculate_signature(cifs_pdu, &server->mac_signing_key,
Steve Frenchffdd6e42007-06-24 21:15:44 +000081 smb_signature);
82 if (rc)
Linus Torvalds1da177e2005-04-16 15:20:36 -070083 memset(cifs_pdu->Signature.SecuritySignature, 0, 8);
84 else
85 memcpy(cifs_pdu->Signature.SecuritySignature, smb_signature, 8);
86
87 return rc;
88}
89
Steve Frenchffdd6e42007-06-24 21:15:44 +000090static int cifs_calc_signature2(const struct kvec *iov, int n_vec,
Steve Frenchb609f062007-07-09 07:55:14 +000091 const struct mac_key *key, char *signature)
Steve French84afc292005-12-02 13:32:45 -080092{
Steve Frenche9917a02006-03-31 21:22:00 +000093 struct MD5Context context;
94 int i;
Steve French84afc292005-12-02 13:32:45 -080095
Steve Frenchb609f062007-07-09 07:55:14 +000096 if ((iov == NULL) || (signature == NULL) || (key == NULL))
Steve Frenche9917a02006-03-31 21:22:00 +000097 return -EINVAL;
Steve French84afc292005-12-02 13:32:45 -080098
Steve Frenche9917a02006-03-31 21:22:00 +000099 MD5Init(&context);
Steve Frenchb609f062007-07-09 07:55:14 +0000100 MD5Update(&context, (char *)&key->data, key->len);
Steve French50c2f752007-07-13 00:33:32 +0000101 for (i = 0; i < n_vec; i++) {
Steve Frenchffdd6e42007-06-24 21:15:44 +0000102 if (iov[i].iov_base == NULL) {
Steve French50c2f752007-07-13 00:33:32 +0000103 cERROR(1, ("null iovec entry"));
Steve Frenche9917a02006-03-31 21:22:00 +0000104 return -EIO;
Steve Frenchffdd6e42007-06-24 21:15:44 +0000105 } else if (iov[i].iov_len == 0)
Steve Frenche9917a02006-03-31 21:22:00 +0000106 break; /* bail out if we are sent nothing to sign */
Steve Frenchffdd6e42007-06-24 21:15:44 +0000107 /* The first entry includes a length field (which does not get
Steve Frenche9917a02006-03-31 21:22:00 +0000108 signed that occupies the first 4 bytes before the header */
Steve Frenchffdd6e42007-06-24 21:15:44 +0000109 if (i == 0) {
Steve Frenche9917a02006-03-31 21:22:00 +0000110 if (iov[0].iov_len <= 8 ) /* cmd field at offset 9 */
111 break; /* nothing to sign or corrupt header */
Steve French63135e02007-07-17 17:34:02 +0000112 MD5Update(&context, iov[0].iov_base+4,
113 iov[0].iov_len-4);
Steve Frenche9917a02006-03-31 21:22:00 +0000114 } else
Steve Frenchffdd6e42007-06-24 21:15:44 +0000115 MD5Update(&context, iov[i].iov_base, iov[i].iov_len);
Steve Frenche9917a02006-03-31 21:22:00 +0000116 }
Steve French84afc292005-12-02 13:32:45 -0800117
Steve Frenchffdd6e42007-06-24 21:15:44 +0000118 MD5Final(signature, &context);
Steve French84afc292005-12-02 13:32:45 -0800119
Steve Frenche9917a02006-03-31 21:22:00 +0000120 return 0;
Steve French84afc292005-12-02 13:32:45 -0800121}
122
123
Steve Frenchffdd6e42007-06-24 21:15:44 +0000124int cifs_sign_smb2(struct kvec *iov, int n_vec, struct TCP_Server_Info *server,
Steve French84afc292005-12-02 13:32:45 -0800125 __u32 * pexpected_response_sequence_number)
126{
127 int rc = 0;
128 char smb_signature[20];
Steve Frenchffdd6e42007-06-24 21:15:44 +0000129 struct smb_hdr *cifs_pdu = iov[0].iov_base;
Steve French84afc292005-12-02 13:32:45 -0800130
Steve Frenchffdd6e42007-06-24 21:15:44 +0000131 if ((cifs_pdu == NULL) || (server == NULL))
Steve French84afc292005-12-02 13:32:45 -0800132 return -EINVAL;
133
Steve Frenchffdd6e42007-06-24 21:15:44 +0000134 if ((cifs_pdu->Flags2 & SMBFLG2_SECURITY_SIGNATURE) == 0)
Steve French84afc292005-12-02 13:32:45 -0800135 return rc;
136
Steve Frenchffdd6e42007-06-24 21:15:44 +0000137 spin_lock(&GlobalMid_Lock);
138 cifs_pdu->Signature.Sequence.SequenceNumber =
Steve French84afc292005-12-02 13:32:45 -0800139 cpu_to_le32(server->sequence_number);
Steve Frenchffdd6e42007-06-24 21:15:44 +0000140 cifs_pdu->Signature.Sequence.Reserved = 0;
Steve French84afc292005-12-02 13:32:45 -0800141
Steve Frenchffdd6e42007-06-24 21:15:44 +0000142 *pexpected_response_sequence_number = server->sequence_number++;
143 server->sequence_number++;
144 spin_unlock(&GlobalMid_Lock);
Steve French84afc292005-12-02 13:32:45 -0800145
Steve Frenchb609f062007-07-09 07:55:14 +0000146 rc = cifs_calc_signature2(iov, n_vec, &server->mac_signing_key,
Steve French84afc292005-12-02 13:32:45 -0800147 smb_signature);
Steve Frenchffdd6e42007-06-24 21:15:44 +0000148 if (rc)
149 memset(cifs_pdu->Signature.SecuritySignature, 0, 8);
150 else
151 memcpy(cifs_pdu->Signature.SecuritySignature, smb_signature, 8);
Steve French84afc292005-12-02 13:32:45 -0800152
Steve Frenchffdd6e42007-06-24 21:15:44 +0000153 return rc;
Steve French84afc292005-12-02 13:32:45 -0800154}
155
Steve Frenchb609f062007-07-09 07:55:14 +0000156int cifs_verify_signature(struct smb_hdr *cifs_pdu,
157 const struct mac_key *mac_key,
Steve Frenchffdd6e42007-06-24 21:15:44 +0000158 __u32 expected_sequence_number)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700159{
160 unsigned int rc;
161 char server_response_sig[8];
162 char what_we_think_sig_should_be[20];
163
Steve Frenchffdd6e42007-06-24 21:15:44 +0000164 if ((cifs_pdu == NULL) || (mac_key == NULL))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165 return -EINVAL;
166
167 if (cifs_pdu->Command == SMB_COM_NEGOTIATE)
168 return 0;
169
170 if (cifs_pdu->Command == SMB_COM_LOCKING_ANDX) {
Steve French50c2f752007-07-13 00:33:32 +0000171 struct smb_com_lock_req *pSMB =
Steve Frenchffdd6e42007-06-24 21:15:44 +0000172 (struct smb_com_lock_req *)cifs_pdu;
173 if (pSMB->LockType & LOCKING_ANDX_OPLOCK_RELEASE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174 return 0;
175 }
176
Steve French50c2f752007-07-13 00:33:32 +0000177 /* BB what if signatures are supposed to be on for session but
178 server does not send one? BB */
179
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180 /* Do not need to verify session setups with signature "BSRSPYL " */
Steve French50c2f752007-07-13 00:33:32 +0000181 if (memcmp(cifs_pdu->Signature.SecuritySignature, "BSRSPYL ", 8) == 0)
182 cFYI(1, ("dummy signature received for smb command 0x%x",
183 cifs_pdu->Command));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184
185 /* save off the origiginal signature so we can modify the smb and check
186 its signature against what the server sent */
Steve French50c2f752007-07-13 00:33:32 +0000187 memcpy(server_response_sig, cifs_pdu->Signature.SecuritySignature, 8);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700188
Steve French50c2f752007-07-13 00:33:32 +0000189 cifs_pdu->Signature.Sequence.SequenceNumber =
190 cpu_to_le32(expected_sequence_number);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191 cifs_pdu->Signature.Sequence.Reserved = 0;
192
193 rc = cifs_calculate_signature(cifs_pdu, mac_key,
194 what_we_think_sig_should_be);
195
Steve French50c2f752007-07-13 00:33:32 +0000196 if (rc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197 return rc;
198
Steve French50c2f752007-07-13 00:33:32 +0000199/* cifs_dump_mem("what we think it should be: ",
200 what_we_think_sig_should_be, 16); */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201
Steve French50c2f752007-07-13 00:33:32 +0000202 if (memcmp(server_response_sig, what_we_think_sig_should_be, 8))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700203 return -EACCES;
204 else
205 return 0;
206
207}
208
209/* We fill in key by putting in 40 byte array which was allocated by caller */
Steve Frenchb609f062007-07-09 07:55:14 +0000210int cifs_calculate_mac_key(struct mac_key *key, const char *rn,
211 const char *password)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212{
213 char temp_key[16];
214 if ((key == NULL) || (rn == NULL))
215 return -EINVAL;
216
217 E_md4hash(password, temp_key);
Steve Frenchb609f062007-07-09 07:55:14 +0000218 mdfour(key->data.ntlm, temp_key, 16);
219 memcpy(key->data.ntlm+16, rn, CIFS_SESS_KEY_SIZE);
220 key->len = 40;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700221 return 0;
222}
223
Steve French50c2f752007-07-13 00:33:32 +0000224int CalcNTLMv2_partial_mac_key(struct cifsSesInfo *ses,
225 const struct nls_table *nls_info)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226{
227 char temp_hash[16];
228 struct HMACMD5Context ctx;
Steve French50c2f752007-07-13 00:33:32 +0000229 char *ucase_buf;
230 __le16 *unicode_buf;
231 unsigned int i, user_name_len, dom_name_len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232
Steve French50c2f752007-07-13 00:33:32 +0000233 if (ses == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234 return -EINVAL;
235
236 E_md4hash(ses->password, temp_hash);
237
238 hmac_md5_init_limK_to_64(temp_hash, 16, &ctx);
239 user_name_len = strlen(ses->userName);
Steve French50c2f752007-07-13 00:33:32 +0000240 if (user_name_len > MAX_USERNAME_SIZE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241 return -EINVAL;
Steve French50c2f752007-07-13 00:33:32 +0000242 if (ses->domainName == NULL)
Steve French39798772006-05-31 22:40:51 +0000243 return -EINVAL; /* BB should we use CIFS_LINUX_DOM */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700244 dom_name_len = strlen(ses->domainName);
Steve Frenchb609f062007-07-09 07:55:14 +0000245 if (dom_name_len > MAX_USERNAME_SIZE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246 return -EINVAL;
Steve French50c2f752007-07-13 00:33:32 +0000247
Linus Torvalds1da177e2005-04-16 15:20:36 -0700248 ucase_buf = kmalloc((MAX_USERNAME_SIZE+1), GFP_KERNEL);
Steve Frenchb609f062007-07-09 07:55:14 +0000249 if (ucase_buf == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250 return -ENOMEM;
251 unicode_buf = kmalloc((MAX_USERNAME_SIZE+1)*4, GFP_KERNEL);
Steve Frenchb609f062007-07-09 07:55:14 +0000252 if (unicode_buf == NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253 kfree(ucase_buf);
254 return -ENOMEM;
255 }
Steve French50c2f752007-07-13 00:33:32 +0000256
257 for (i = 0; i < user_name_len; i++)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258 ucase_buf[i] = nls_info->charset2upper[(int)ses->userName[i]];
259 ucase_buf[i] = 0;
Steve French50c2f752007-07-13 00:33:32 +0000260 user_name_len = cifs_strtoUCS(unicode_buf, ucase_buf,
261 MAX_USERNAME_SIZE*2, nls_info);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700262 unicode_buf[user_name_len] = 0;
263 user_name_len++;
264
Steve Frenchb609f062007-07-09 07:55:14 +0000265 for (i = 0; i < dom_name_len; i++)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266 ucase_buf[i] = nls_info->charset2upper[(int)ses->domainName[i]];
267 ucase_buf[i] = 0;
Steve French50c2f752007-07-13 00:33:32 +0000268 dom_name_len = cifs_strtoUCS(unicode_buf+user_name_len, ucase_buf,
269 MAX_USERNAME_SIZE*2, nls_info);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700270
271 unicode_buf[user_name_len + dom_name_len] = 0;
272 hmac_md5_update((const unsigned char *) unicode_buf,
Steve Frenchb609f062007-07-09 07:55:14 +0000273 (user_name_len+dom_name_len)*2, &ctx);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700274
Steve Frenchb609f062007-07-09 07:55:14 +0000275 hmac_md5_final(ses->server->ntlmv2_hash, &ctx);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700276 kfree(ucase_buf);
277 kfree(unicode_buf);
278 return 0;
279}
Steve French7c7b25b2006-06-01 19:20:10 +0000280
281#ifdef CONFIG_CIFS_WEAK_PW_HASH
Steve French50c2f752007-07-13 00:33:32 +0000282void calc_lanman_hash(struct cifsSesInfo *ses, char *lnm_session_key)
Steve French7c7b25b2006-06-01 19:20:10 +0000283{
284 int i;
285 char password_with_pad[CIFS_ENCPWD_SIZE];
286
Steve French50c2f752007-07-13 00:33:32 +0000287 if (ses->server == NULL)
Steve Frenchbdc4bf6e2006-06-02 22:57:13 +0000288 return;
289
Steve French7c7b25b2006-06-01 19:20:10 +0000290 memset(password_with_pad, 0, CIFS_ENCPWD_SIZE);
Steve French50c2f752007-07-13 00:33:32 +0000291 if (ses->password)
Steve French66abda5e2006-08-11 16:52:09 +0000292 strncpy(password_with_pad, ses->password, CIFS_ENCPWD_SIZE);
Steve French7c7b25b2006-06-01 19:20:10 +0000293
Steve French50c2f752007-07-13 00:33:32 +0000294 if ((ses->server->secMode & SECMODE_PW_ENCRYPT) == 0)
295 if (extended_security & CIFSSEC_MAY_PLNTXT) {
296 memcpy(lnm_session_key, password_with_pad,
297 CIFS_ENCPWD_SIZE);
Steve Frenchbdc4bf6e2006-06-02 22:57:13 +0000298 return;
299 }
300
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
Steve French50c2f752007-07-13 00:33:32 +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]);
314 }
315
316 SMBencrypt(password_with_pad, ses->server->cryptKey, lnm_session_key);
317 /* 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;
348 len = cifs_strtoUCS(user, ses->userName, len, nls_cp);
349 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;
359 len = cifs_strtoUCS(domain, ses->domainName, len, nls_cp);
Steve Frenchb609f062007-07-09 07:55:14 +0000360 /* the following line was removed since it didn't work well
361 with lower cased domain name that passed as an option.
362 Maybe converting the domain name earlier makes sense */
363 /* UniStrupr(domain); */
Steve Frencha8ee0342006-06-05 23:34:19 +0000364
Steve French1717ffc2006-06-08 05:41:32 +0000365 hmac_md5_update((char *)domain, 2*len, pctxt);
Steve French50c2f752007-07-13 00:33:32 +0000366
Steve French1717ffc2006-06-08 05:41:32 +0000367 kfree(domain);
368 }
369calc_exit_1:
370 kfree(user);
371calc_exit_2:
Steve French50c2f752007-07-13 00:33:32 +0000372 /* BB FIXME what about bytes 24 through 40 of the signing key?
Steve French1717ffc2006-06-08 05:41:32 +0000373 compare with the NTLM example */
Steve Frenchb609f062007-07-09 07:55:14 +0000374 hmac_md5_final(ses->server->ntlmv2_hash, pctxt);
Steve Frencha8ee0342006-06-05 23:34:19 +0000375
376 return rc;
377}
378
Steve French50c2f752007-07-13 00:33:32 +0000379void setup_ntlmv2_rsp(struct cifsSesInfo *ses, char *resp_buf,
380 const struct nls_table *nls_cp)
Steve French6d027cf2006-06-05 16:26:05 +0000381{
Steve Frencha8ee0342006-06-05 23:34:19 +0000382 int rc;
Steve French50c2f752007-07-13 00:33:32 +0000383 struct ntlmv2_resp *buf = (struct ntlmv2_resp *)resp_buf;
Steve Frenchb609f062007-07-09 07:55:14 +0000384 struct HMACMD5Context context;
Steve French6d027cf2006-06-05 16:26:05 +0000385
386 buf->blob_signature = cpu_to_le32(0x00000101);
387 buf->reserved = 0;
388 buf->time = cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME));
Steve French1717ffc2006-06-08 05:41:32 +0000389 get_random_bytes(&buf->client_chal, sizeof(buf->client_chal));
Steve French6d027cf2006-06-05 16:26:05 +0000390 buf->reserved2 = 0;
Steve French33ec32f2006-12-08 04:14:28 +0000391 buf->names[0].type = cpu_to_le16(NTLMSSP_DOMAIN_TYPE);
Steve French6d027cf2006-06-05 16:26:05 +0000392 buf->names[0].length = 0;
Steve French33ec32f2006-12-08 04:14:28 +0000393 buf->names[1].type = 0;
394 buf->names[1].length = 0;
Steve Frencha8ee0342006-06-05 23:34:19 +0000395
Steve French6d027cf2006-06-05 16:26:05 +0000396 /* calculate buf->ntlmv2_hash */
Steve French1717ffc2006-06-08 05:41:32 +0000397 rc = calc_ntlmv2_hash(ses, nls_cp);
Steve French50c2f752007-07-13 00:33:32 +0000398 if (rc)
399 cERROR(1, ("could not get v2 hash rc %d", rc));
Steve French1717ffc2006-06-08 05:41:32 +0000400 CalcNTLMv2_response(ses, resp_buf);
Steve Frenchb609f062007-07-09 07:55:14 +0000401
402 /* now calculate the MAC key for NTLMv2 */
403 hmac_md5_init_limK_to_64(ses->server->ntlmv2_hash, 16, &context);
404 hmac_md5_update(resp_buf, 16, &context);
405 hmac_md5_final(ses->server->mac_signing_key.data.ntlmv2.key, &context);
406
407 memcpy(&ses->server->mac_signing_key.data.ntlmv2.resp, resp_buf,
408 sizeof(struct ntlmv2_resp));
409 ses->server->mac_signing_key.len = 16 + sizeof(struct ntlmv2_resp);
Steve French6d027cf2006-06-05 16:26:05 +0000410}
411
Steve French50c2f752007-07-13 00:33:32 +0000412void CalcNTLMv2_response(const struct cifsSesInfo *ses,
413 char *v2_session_response)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700414{
415 struct HMACMD5Context context;
Steve French1717ffc2006-06-08 05:41:32 +0000416 /* rest of v2 struct already generated */
Steve French50c2f752007-07-13 00:33:32 +0000417 memcpy(v2_session_response + 8, ses->server->cryptKey, 8);
Steve Frenchb609f062007-07-09 07:55:14 +0000418 hmac_md5_init_limK_to_64(ses->server->ntlmv2_hash, 16, &context);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700419
Steve Frenchb609f062007-07-09 07:55:14 +0000420 hmac_md5_update(v2_session_response+8,
Steve French1717ffc2006-06-08 05:41:32 +0000421 sizeof(struct ntlmv2_resp) - 8, &context);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700422
Steve French50c2f752007-07-13 00:33:32 +0000423 hmac_md5_final(v2_session_response, &context);
Steve French1717ffc2006-06-08 05:41:32 +0000424/* cifs_dump_mem("v2_sess_rsp: ", v2_session_response, 32); */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700425}