blob: 7efe1745494d10a4968ef09f308af577d6ccc1c9 [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);
Jeff Layton4e53a3f2008-12-05 20:41:21 -050040extern void SMBencrypt(unsigned char *passwd, const 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
Steve French6a7f8d32009-01-12 21:03:25 +000051 cifs_MD5_init(&context);
52 cifs_MD5_update(&context, (char *)&key->data, key->len);
53 cifs_MD5_update(&context, cifs_pdu->Protocol, cifs_pdu->smb_buf_length);
Steve Frenchb609f062007-07-09 07:55:14 +000054
Steve French6a7f8d32009-01-12 21:03:25 +000055 cifs_MD5_final(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 French6a7f8d32009-01-12 21:03:25 +000099 cifs_MD5_init(&context);
100 cifs_MD5_update(&context, (char *)&key->data, key->len);
Steve French50c2f752007-07-13 00:33:32 +0000101 for (i = 0; i < n_vec; i++) {
Jeff Layton745542e2007-11-03 04:34:04 +0000102 if (iov[i].iov_len == 0)
103 continue;
Steve Frenchffdd6e42007-06-24 21:15:44 +0000104 if (iov[i].iov_base == NULL) {
Steve French50c2f752007-07-13 00:33:32 +0000105 cERROR(1, ("null iovec entry"));
Steve Frenche9917a02006-03-31 21:22:00 +0000106 return -EIO;
Jeff Layton745542e2007-11-03 04:34:04 +0000107 }
Steve Frenchffdd6e42007-06-24 21:15:44 +0000108 /* The first entry includes a length field (which does not get
Steve Frenche9917a02006-03-31 21:22:00 +0000109 signed that occupies the first 4 bytes before the header */
Steve Frenchffdd6e42007-06-24 21:15:44 +0000110 if (i == 0) {
Steve French63d25832007-11-05 21:46:10 +0000111 if (iov[0].iov_len <= 8) /* cmd field at offset 9 */
Steve Frenche9917a02006-03-31 21:22:00 +0000112 break; /* nothing to sign or corrupt header */
Steve French6a7f8d32009-01-12 21:03:25 +0000113 cifs_MD5_update(&context, iov[0].iov_base+4,
Steve French63135e02007-07-17 17:34:02 +0000114 iov[0].iov_len-4);
Steve Frenche9917a02006-03-31 21:22:00 +0000115 } else
Steve French6a7f8d32009-01-12 21:03:25 +0000116 cifs_MD5_update(&context, iov[i].iov_base, iov[i].iov_len);
Steve Frenche9917a02006-03-31 21:22:00 +0000117 }
Steve French84afc292005-12-02 13:32:45 -0800118
Steve French6a7f8d32009-01-12 21:03:25 +0000119 cifs_MD5_final(signature, &context);
Steve French84afc292005-12-02 13:32:45 -0800120
Steve Frenche9917a02006-03-31 21:22:00 +0000121 return 0;
Steve French84afc292005-12-02 13:32:45 -0800122}
123
124
Steve Frenchffdd6e42007-06-24 21:15:44 +0000125int cifs_sign_smb2(struct kvec *iov, int n_vec, struct TCP_Server_Info *server,
Steve French63d25832007-11-05 21:46:10 +0000126 __u32 *pexpected_response_sequence_number)
Steve French84afc292005-12-02 13:32:45 -0800127{
128 int rc = 0;
129 char smb_signature[20];
Steve Frenchffdd6e42007-06-24 21:15:44 +0000130 struct smb_hdr *cifs_pdu = iov[0].iov_base;
Steve French84afc292005-12-02 13:32:45 -0800131
Steve Frenchffdd6e42007-06-24 21:15:44 +0000132 if ((cifs_pdu == NULL) || (server == NULL))
Steve French84afc292005-12-02 13:32:45 -0800133 return -EINVAL;
134
Steve Frenchffdd6e42007-06-24 21:15:44 +0000135 if ((cifs_pdu->Flags2 & SMBFLG2_SECURITY_SIGNATURE) == 0)
Steve French84afc292005-12-02 13:32:45 -0800136 return rc;
137
Steve Frenchffdd6e42007-06-24 21:15:44 +0000138 spin_lock(&GlobalMid_Lock);
139 cifs_pdu->Signature.Sequence.SequenceNumber =
Steve French84afc292005-12-02 13:32:45 -0800140 cpu_to_le32(server->sequence_number);
Steve Frenchffdd6e42007-06-24 21:15:44 +0000141 cifs_pdu->Signature.Sequence.Reserved = 0;
Steve French84afc292005-12-02 13:32:45 -0800142
Steve Frenchffdd6e42007-06-24 21:15:44 +0000143 *pexpected_response_sequence_number = server->sequence_number++;
144 server->sequence_number++;
145 spin_unlock(&GlobalMid_Lock);
Steve French84afc292005-12-02 13:32:45 -0800146
Steve Frenchb609f062007-07-09 07:55:14 +0000147 rc = cifs_calc_signature2(iov, n_vec, &server->mac_signing_key,
Steve French84afc292005-12-02 13:32:45 -0800148 smb_signature);
Steve Frenchffdd6e42007-06-24 21:15:44 +0000149 if (rc)
150 memset(cifs_pdu->Signature.SecuritySignature, 0, 8);
151 else
152 memcpy(cifs_pdu->Signature.SecuritySignature, smb_signature, 8);
Steve French84afc292005-12-02 13:32:45 -0800153
Steve Frenchffdd6e42007-06-24 21:15:44 +0000154 return rc;
Steve French84afc292005-12-02 13:32:45 -0800155}
156
Steve Frenchb609f062007-07-09 07:55:14 +0000157int cifs_verify_signature(struct smb_hdr *cifs_pdu,
158 const struct mac_key *mac_key,
Steve Frenchffdd6e42007-06-24 21:15:44 +0000159 __u32 expected_sequence_number)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160{
161 unsigned int rc;
162 char server_response_sig[8];
163 char what_we_think_sig_should_be[20];
164
Steve Frenchffdd6e42007-06-24 21:15:44 +0000165 if ((cifs_pdu == NULL) || (mac_key == NULL))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700166 return -EINVAL;
167
168 if (cifs_pdu->Command == SMB_COM_NEGOTIATE)
169 return 0;
170
171 if (cifs_pdu->Command == SMB_COM_LOCKING_ANDX) {
Steve French50c2f752007-07-13 00:33:32 +0000172 struct smb_com_lock_req *pSMB =
Steve Frenchffdd6e42007-06-24 21:15:44 +0000173 (struct smb_com_lock_req *)cifs_pdu;
174 if (pSMB->LockType & LOCKING_ANDX_OPLOCK_RELEASE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700175 return 0;
176 }
177
Steve French50c2f752007-07-13 00:33:32 +0000178 /* BB what if signatures are supposed to be on for session but
179 server does not send one? BB */
180
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181 /* Do not need to verify session setups with signature "BSRSPYL " */
Steve French50c2f752007-07-13 00:33:32 +0000182 if (memcmp(cifs_pdu->Signature.SecuritySignature, "BSRSPYL ", 8) == 0)
183 cFYI(1, ("dummy signature received for smb command 0x%x",
184 cifs_pdu->Command));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185
186 /* save off the origiginal signature so we can modify the smb and check
187 its signature against what the server sent */
Steve French50c2f752007-07-13 00:33:32 +0000188 memcpy(server_response_sig, cifs_pdu->Signature.SecuritySignature, 8);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189
Steve French50c2f752007-07-13 00:33:32 +0000190 cifs_pdu->Signature.Sequence.SequenceNumber =
191 cpu_to_le32(expected_sequence_number);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192 cifs_pdu->Signature.Sequence.Reserved = 0;
193
194 rc = cifs_calculate_signature(cifs_pdu, mac_key,
195 what_we_think_sig_should_be);
196
Steve French50c2f752007-07-13 00:33:32 +0000197 if (rc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700198 return rc;
199
Steve French50c2f752007-07-13 00:33:32 +0000200/* cifs_dump_mem("what we think it should be: ",
201 what_we_think_sig_should_be, 16); */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700202
Steve French50c2f752007-07-13 00:33:32 +0000203 if (memcmp(server_response_sig, what_we_think_sig_should_be, 8))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204 return -EACCES;
205 else
206 return 0;
207
208}
209
210/* We fill in key by putting in 40 byte array which was allocated by caller */
Steve Frenchb609f062007-07-09 07:55:14 +0000211int cifs_calculate_mac_key(struct mac_key *key, const char *rn,
212 const char *password)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213{
214 char temp_key[16];
215 if ((key == NULL) || (rn == NULL))
216 return -EINVAL;
217
218 E_md4hash(password, temp_key);
Steve Frenchb609f062007-07-09 07:55:14 +0000219 mdfour(key->data.ntlm, temp_key, 16);
220 memcpy(key->data.ntlm+16, rn, CIFS_SESS_KEY_SIZE);
221 key->len = 40;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222 return 0;
223}
224
Steve French50c2f752007-07-13 00:33:32 +0000225int CalcNTLMv2_partial_mac_key(struct cifsSesInfo *ses,
226 const struct nls_table *nls_info)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227{
228 char temp_hash[16];
229 struct HMACMD5Context ctx;
Steve French50c2f752007-07-13 00:33:32 +0000230 char *ucase_buf;
231 __le16 *unicode_buf;
232 unsigned int i, user_name_len, dom_name_len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233
Steve French50c2f752007-07-13 00:33:32 +0000234 if (ses == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700235 return -EINVAL;
236
237 E_md4hash(ses->password, temp_hash);
238
239 hmac_md5_init_limK_to_64(temp_hash, 16, &ctx);
240 user_name_len = strlen(ses->userName);
Steve French50c2f752007-07-13 00:33:32 +0000241 if (user_name_len > MAX_USERNAME_SIZE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242 return -EINVAL;
Steve French50c2f752007-07-13 00:33:32 +0000243 if (ses->domainName == NULL)
Steve French39798772006-05-31 22:40:51 +0000244 return -EINVAL; /* BB should we use CIFS_LINUX_DOM */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700245 dom_name_len = strlen(ses->domainName);
Steve Frenchb609f062007-07-09 07:55:14 +0000246 if (dom_name_len > MAX_USERNAME_SIZE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247 return -EINVAL;
Steve French50c2f752007-07-13 00:33:32 +0000248
Linus Torvalds1da177e2005-04-16 15:20:36 -0700249 ucase_buf = kmalloc((MAX_USERNAME_SIZE+1), GFP_KERNEL);
Steve Frenchb609f062007-07-09 07:55:14 +0000250 if (ucase_buf == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700251 return -ENOMEM;
252 unicode_buf = kmalloc((MAX_USERNAME_SIZE+1)*4, GFP_KERNEL);
Steve Frenchb609f062007-07-09 07:55:14 +0000253 if (unicode_buf == NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700254 kfree(ucase_buf);
255 return -ENOMEM;
256 }
Steve French50c2f752007-07-13 00:33:32 +0000257
258 for (i = 0; i < user_name_len; i++)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259 ucase_buf[i] = nls_info->charset2upper[(int)ses->userName[i]];
260 ucase_buf[i] = 0;
Steve French50c2f752007-07-13 00:33:32 +0000261 user_name_len = cifs_strtoUCS(unicode_buf, ucase_buf,
262 MAX_USERNAME_SIZE*2, nls_info);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700263 unicode_buf[user_name_len] = 0;
264 user_name_len++;
265
Steve Frenchb609f062007-07-09 07:55:14 +0000266 for (i = 0; i < dom_name_len; i++)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700267 ucase_buf[i] = nls_info->charset2upper[(int)ses->domainName[i]];
268 ucase_buf[i] = 0;
Steve French50c2f752007-07-13 00:33:32 +0000269 dom_name_len = cifs_strtoUCS(unicode_buf+user_name_len, ucase_buf,
270 MAX_USERNAME_SIZE*2, nls_info);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271
272 unicode_buf[user_name_len + dom_name_len] = 0;
273 hmac_md5_update((const unsigned char *) unicode_buf,
Steve Frenchb609f062007-07-09 07:55:14 +0000274 (user_name_len+dom_name_len)*2, &ctx);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700275
Steve Frenchb609f062007-07-09 07:55:14 +0000276 hmac_md5_final(ses->server->ntlmv2_hash, &ctx);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277 kfree(ucase_buf);
278 kfree(unicode_buf);
279 return 0;
280}
Steve French7c7b25b2006-06-01 19:20:10 +0000281
282#ifdef CONFIG_CIFS_WEAK_PW_HASH
Jeff Layton4e53a3f2008-12-05 20:41:21 -0500283void calc_lanman_hash(const char *password, const char *cryptkey, bool encrypt,
284 char *lnm_session_key)
Steve French7c7b25b2006-06-01 19:20:10 +0000285{
286 int i;
287 char password_with_pad[CIFS_ENCPWD_SIZE];
288
289 memset(password_with_pad, 0, CIFS_ENCPWD_SIZE);
Jeff Layton4e53a3f2008-12-05 20:41:21 -0500290 if (password)
291 strncpy(password_with_pad, password, CIFS_ENCPWD_SIZE);
Steve French7c7b25b2006-06-01 19:20:10 +0000292
Jeff Layton4e53a3f2008-12-05 20:41:21 -0500293 if (!encrypt && extended_security & CIFSSEC_MAY_PLNTXT) {
294 memset(lnm_session_key, 0, CIFS_SESS_KEY_SIZE);
295 memcpy(lnm_session_key, password_with_pad,
296 CIFS_ENCPWD_SIZE);
297 return;
298 }
Steve Frenchbdc4bf6e2006-06-02 22:57:13 +0000299
Steve French7c7b25b2006-06-01 19:20:10 +0000300 /* calculate old style session key */
301 /* calling toupper is less broken than repeatedly
302 calling nls_toupper would be since that will never
303 work for UTF8, but neither handles multibyte code pages
304 but the only alternative would be converting to UCS-16 (Unicode)
305 (using a routine something like UniStrupr) then
306 uppercasing and then converting back from Unicode - which
307 would only worth doing it if we knew it were utf8. Basically
308 utf8 and other multibyte codepages each need their own strupper
309 function since a byte at a time will ont work. */
310
Shirish Pargaonkaref571ca2008-07-24 15:56:05 +0000311 for (i = 0; i < CIFS_ENCPWD_SIZE; i++)
Steve French7c7b25b2006-06-01 19:20:10 +0000312 password_with_pad[i] = toupper(password_with_pad[i]);
Steve French7c7b25b2006-06-01 19:20:10 +0000313
Jeff Layton4e53a3f2008-12-05 20:41:21 -0500314 SMBencrypt(password_with_pad, cryptkey, lnm_session_key);
315
Steve French7c7b25b2006-06-01 19:20:10 +0000316 /* clear password before we return/free memory */
317 memset(password_with_pad, 0, CIFS_ENCPWD_SIZE);
318}
319#endif /* CIFS_WEAK_PW_HASH */
320
Steve French50c2f752007-07-13 00:33:32 +0000321static int calc_ntlmv2_hash(struct cifsSesInfo *ses,
322 const struct nls_table *nls_cp)
Steve Frencha8ee0342006-06-05 23:34:19 +0000323{
324 int rc = 0;
325 int len;
326 char nt_hash[16];
Steve French50c2f752007-07-13 00:33:32 +0000327 struct HMACMD5Context *pctxt;
328 wchar_t *user;
329 wchar_t *domain;
Steve Frencha8ee0342006-06-05 23:34:19 +0000330
331 pctxt = kmalloc(sizeof(struct HMACMD5Context), GFP_KERNEL);
332
Steve French50c2f752007-07-13 00:33:32 +0000333 if (pctxt == NULL)
Steve Frencha8ee0342006-06-05 23:34:19 +0000334 return -ENOMEM;
335
336 /* calculate md4 hash of password */
337 E_md4hash(ses->password, nt_hash);
338
Steve French1717ffc2006-06-08 05:41:32 +0000339 /* convert Domainname to unicode and uppercase */
Steve Frencha8ee0342006-06-05 23:34:19 +0000340 hmac_md5_init_limK_to_64(nt_hash, 16, pctxt);
341
342 /* convert ses->userName to unicode and uppercase */
Steve French1717ffc2006-06-08 05:41:32 +0000343 len = strlen(ses->userName);
344 user = kmalloc(2 + (len * 2), GFP_KERNEL);
Steve French50c2f752007-07-13 00:33:32 +0000345 if (user == NULL)
Steve French1717ffc2006-06-08 05:41:32 +0000346 goto calc_exit_2;
Cyril Gorcunov8f2376a2007-10-14 17:58:43 +0000347 len = cifs_strtoUCS((__le16 *)user, ses->userName, len, nls_cp);
Steve French1717ffc2006-06-08 05:41:32 +0000348 UniStrupr(user);
349 hmac_md5_update((char *)user, 2*len, pctxt);
Steve Frencha8ee0342006-06-05 23:34:19 +0000350
351 /* convert ses->domainName to unicode and uppercase */
Steve French50c2f752007-07-13 00:33:32 +0000352 if (ses->domainName) {
Steve French1717ffc2006-06-08 05:41:32 +0000353 len = strlen(ses->domainName);
Steve Frencha8ee0342006-06-05 23:34:19 +0000354
Steve French50c2f752007-07-13 00:33:32 +0000355 domain = kmalloc(2 + (len * 2), GFP_KERNEL);
356 if (domain == NULL)
Steve French1717ffc2006-06-08 05:41:32 +0000357 goto calc_exit_1;
Cyril Gorcunov8f2376a2007-10-14 17:58:43 +0000358 len = cifs_strtoUCS((__le16 *)domain, ses->domainName, len,
359 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
Alexander Strakh1b3859b2009-09-01 17:02:24 +0000376 kfree(pctxt);
Steve Frencha8ee0342006-06-05 23:34:19 +0000377 return rc;
378}
379
Steve French50c2f752007-07-13 00:33:32 +0000380void setup_ntlmv2_rsp(struct cifsSesInfo *ses, char *resp_buf,
381 const struct nls_table *nls_cp)
Steve French6d027cf2006-06-05 16:26:05 +0000382{
Steve Frencha8ee0342006-06-05 23:34:19 +0000383 int rc;
Steve French50c2f752007-07-13 00:33:32 +0000384 struct ntlmv2_resp *buf = (struct ntlmv2_resp *)resp_buf;
Steve Frenchb609f062007-07-09 07:55:14 +0000385 struct HMACMD5Context context;
Steve French6d027cf2006-06-05 16:26:05 +0000386
387 buf->blob_signature = cpu_to_le32(0x00000101);
388 buf->reserved = 0;
389 buf->time = cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME));
Steve French1717ffc2006-06-08 05:41:32 +0000390 get_random_bytes(&buf->client_chal, sizeof(buf->client_chal));
Steve French6d027cf2006-06-05 16:26:05 +0000391 buf->reserved2 = 0;
Steve French33ec32f2006-12-08 04:14:28 +0000392 buf->names[0].type = cpu_to_le16(NTLMSSP_DOMAIN_TYPE);
Steve French6d027cf2006-06-05 16:26:05 +0000393 buf->names[0].length = 0;
Steve French33ec32f2006-12-08 04:14:28 +0000394 buf->names[1].type = 0;
395 buf->names[1].length = 0;
Steve Frencha8ee0342006-06-05 23:34:19 +0000396
Steve French6d027cf2006-06-05 16:26:05 +0000397 /* calculate buf->ntlmv2_hash */
Steve French1717ffc2006-06-08 05:41:32 +0000398 rc = calc_ntlmv2_hash(ses, nls_cp);
Steve French50c2f752007-07-13 00:33:32 +0000399 if (rc)
400 cERROR(1, ("could not get v2 hash rc %d", rc));
Steve French1717ffc2006-06-08 05:41:32 +0000401 CalcNTLMv2_response(ses, resp_buf);
Steve Frenchb609f062007-07-09 07:55:14 +0000402
403 /* now calculate the MAC key for NTLMv2 */
404 hmac_md5_init_limK_to_64(ses->server->ntlmv2_hash, 16, &context);
405 hmac_md5_update(resp_buf, 16, &context);
406 hmac_md5_final(ses->server->mac_signing_key.data.ntlmv2.key, &context);
407
408 memcpy(&ses->server->mac_signing_key.data.ntlmv2.resp, resp_buf,
409 sizeof(struct ntlmv2_resp));
410 ses->server->mac_signing_key.len = 16 + sizeof(struct ntlmv2_resp);
Steve French6d027cf2006-06-05 16:26:05 +0000411}
412
Steve French50c2f752007-07-13 00:33:32 +0000413void CalcNTLMv2_response(const struct cifsSesInfo *ses,
414 char *v2_session_response)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700415{
416 struct HMACMD5Context context;
Steve French1717ffc2006-06-08 05:41:32 +0000417 /* rest of v2 struct already generated */
Steve French50c2f752007-07-13 00:33:32 +0000418 memcpy(v2_session_response + 8, ses->server->cryptKey, 8);
Steve Frenchb609f062007-07-09 07:55:14 +0000419 hmac_md5_init_limK_to_64(ses->server->ntlmv2_hash, 16, &context);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700420
Steve Frenchb609f062007-07-09 07:55:14 +0000421 hmac_md5_update(v2_session_response+8,
Steve French1717ffc2006-06-08 05:41:32 +0000422 sizeof(struct ntlmv2_resp) - 8, &context);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700423
Steve French50c2f752007-07-13 00:33:32 +0000424 hmac_md5_final(v2_session_response, &context);
Steve French1717ffc2006-06-08 05:41:32 +0000425/* cifs_dump_mem("v2_sess_rsp: ", v2_session_response, 32); */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700426}