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929be906 | 1 | // SPDX-License-Identifier: LGPL-2.1 |
093b2bda | 2 | /* |
093b2bda PS |
3 | * |
4 | * Copyright (C) International Business Machines Corp., 2002,2011 | |
5 | * Etersoft, 2012 | |
6 | * Author(s): Steve French (sfrench@us.ibm.com) | |
7 | * Pavel Shilovsky (pshilovsky@samba.org) 2012 | |
8 | * | |
093b2bda PS |
9 | */ |
10 | #include <linux/ctype.h> | |
093b2bda PS |
11 | #include "cifsglob.h" |
12 | #include "cifsproto.h" | |
13 | #include "smb2proto.h" | |
14 | #include "cifs_debug.h" | |
15 | #include "cifs_unicode.h" | |
16 | #include "smb2status.h" | |
31473fc4 | 17 | #include "smb2glob.h" |
d70e9fa5 | 18 | #include "nterr.h" |
093b2bda PS |
19 | |
20 | static int | |
0d35e382 | 21 | check_smb2_hdr(struct smb2_hdr *shdr, __u64 mid) |
093b2bda | 22 | { |
31473fc4 | 23 | __u64 wire_mid = le64_to_cpu(shdr->MessageId); |
9235d098 | 24 | |
093b2bda PS |
25 | /* |
26 | * Make sure that this really is an SMB, that it is a response, | |
27 | * and that the message ids match. | |
28 | */ | |
31473fc4 | 29 | if ((shdr->ProtocolId == SMB2_PROTO_NUMBER) && |
9235d098 | 30 | (mid == wire_mid)) { |
31473fc4 | 31 | if (shdr->Flags & SMB2_FLAGS_SERVER_TO_REDIR) |
093b2bda PS |
32 | return 0; |
33 | else { | |
34 | /* only one valid case where server sends us request */ | |
31473fc4 | 35 | if (shdr->Command == SMB2_OPLOCK_BREAK) |
093b2bda PS |
36 | return 0; |
37 | else | |
f96637be | 38 | cifs_dbg(VFS, "Received Request not response\n"); |
093b2bda PS |
39 | } |
40 | } else { /* bad signature or mid */ | |
31473fc4 | 41 | if (shdr->ProtocolId != SMB2_PROTO_NUMBER) |
f96637be | 42 | cifs_dbg(VFS, "Bad protocol string signature header %x\n", |
31473fc4 | 43 | le32_to_cpu(shdr->ProtocolId)); |
9235d098 | 44 | if (mid != wire_mid) |
f96637be | 45 | cifs_dbg(VFS, "Mids do not match: %llu and %llu\n", |
9235d098 | 46 | mid, wire_mid); |
093b2bda | 47 | } |
9235d098 | 48 | cifs_dbg(VFS, "Bad SMB detected. The Mid=%llu\n", wire_mid); |
093b2bda PS |
49 | return 1; |
50 | } | |
51 | ||
52 | /* | |
53 | * The following table defines the expected "StructureSize" of SMB2 responses | |
54 | * in order by SMB2 command. This is similar to "wct" in SMB/CIFS responses. | |
55 | * | |
56 | * Note that commands are defined in smb2pdu.h in le16 but the array below is | |
57 | * indexed by command in host byte order | |
58 | */ | |
59 | static const __le16 smb2_rsp_struct_sizes[NUMBER_OF_SMB2_COMMANDS] = { | |
bc09d141 FF |
60 | /* SMB2_NEGOTIATE */ cpu_to_le16(65), |
61 | /* SMB2_SESSION_SETUP */ cpu_to_le16(9), | |
62 | /* SMB2_LOGOFF */ cpu_to_le16(4), | |
63 | /* SMB2_TREE_CONNECT */ cpu_to_le16(16), | |
64 | /* SMB2_TREE_DISCONNECT */ cpu_to_le16(4), | |
65 | /* SMB2_CREATE */ cpu_to_le16(89), | |
66 | /* SMB2_CLOSE */ cpu_to_le16(60), | |
67 | /* SMB2_FLUSH */ cpu_to_le16(4), | |
68 | /* SMB2_READ */ cpu_to_le16(17), | |
69 | /* SMB2_WRITE */ cpu_to_le16(17), | |
70 | /* SMB2_LOCK */ cpu_to_le16(4), | |
71 | /* SMB2_IOCTL */ cpu_to_le16(49), | |
093b2bda | 72 | /* BB CHECK this ... not listed in documentation */ |
bc09d141 FF |
73 | /* SMB2_CANCEL */ cpu_to_le16(0), |
74 | /* SMB2_ECHO */ cpu_to_le16(4), | |
75 | /* SMB2_QUERY_DIRECTORY */ cpu_to_le16(9), | |
76 | /* SMB2_CHANGE_NOTIFY */ cpu_to_le16(9), | |
77 | /* SMB2_QUERY_INFO */ cpu_to_le16(9), | |
78 | /* SMB2_SET_INFO */ cpu_to_le16(2), | |
093b2bda | 79 | /* BB FIXME can also be 44 for lease break */ |
bc09d141 | 80 | /* SMB2_OPLOCK_BREAK */ cpu_to_le16(24) |
093b2bda PS |
81 | }; |
82 | ||
0d35e382 | 83 | #define SMB311_NEGPROT_BASE_SIZE (sizeof(struct smb2_hdr) + sizeof(struct smb2_negotiate_rsp)) |
bc7c4129 | 84 | |
0d35e382 | 85 | static __u32 get_neg_ctxt_len(struct smb2_hdr *hdr, __u32 len, |
1fc6ad2f | 86 | __u32 non_ctxlen) |
136ff1b4 SF |
87 | { |
88 | __u16 neg_count; | |
89 | __u32 nc_offset, size_of_pad_before_neg_ctxts; | |
90 | struct smb2_negotiate_rsp *pneg_rsp = (struct smb2_negotiate_rsp *)hdr; | |
91 | ||
92 | /* Negotiate contexts are only valid for latest dialect SMB3.11 */ | |
93 | neg_count = le16_to_cpu(pneg_rsp->NegotiateContextCount); | |
94 | if ((neg_count == 0) || | |
95 | (pneg_rsp->DialectRevision != cpu_to_le16(SMB311_PROT_ID))) | |
96 | return 0; | |
97 | ||
145024e3 SF |
98 | /* |
99 | * if SPNEGO blob present (ie the RFC2478 GSS info which indicates | |
100 | * which security mechanisms the server supports) make sure that | |
101 | * the negotiate contexts start after it | |
102 | */ | |
136ff1b4 | 103 | nc_offset = le32_to_cpu(pneg_rsp->NegotiateContextOffset); |
145024e3 SF |
104 | /* |
105 | * non_ctxlen is at least shdr->StructureSize + pdu->StructureSize2 | |
106 | * and the latter is 1 byte bigger than the fix-sized area of the | |
107 | * NEGOTIATE response | |
108 | */ | |
bc7c4129 SF |
109 | if (nc_offset + 1 < non_ctxlen) { |
110 | pr_warn_once("Invalid negotiate context offset %d\n", nc_offset); | |
136ff1b4 | 111 | return 0; |
bc7c4129 SF |
112 | } else if (nc_offset + 1 == non_ctxlen) { |
113 | cifs_dbg(FYI, "no SPNEGO security blob in negprot rsp\n"); | |
114 | size_of_pad_before_neg_ctxts = 0; | |
115 | } else if (non_ctxlen == SMB311_NEGPROT_BASE_SIZE) | |
116 | /* has padding, but no SPNEGO blob */ | |
117 | size_of_pad_before_neg_ctxts = nc_offset - non_ctxlen + 1; | |
118 | else | |
119 | size_of_pad_before_neg_ctxts = nc_offset - non_ctxlen; | |
136ff1b4 SF |
120 | |
121 | /* Verify that at least minimal negotiate contexts fit within frame */ | |
122 | if (len < nc_offset + (neg_count * sizeof(struct smb2_neg_context))) { | |
a0a3036b | 123 | pr_warn_once("negotiate context goes beyond end\n"); |
136ff1b4 SF |
124 | return 0; |
125 | } | |
126 | ||
127 | cifs_dbg(FYI, "length of negcontexts %d pad %d\n", | |
128 | len - nc_offset, size_of_pad_before_neg_ctxts); | |
129 | ||
130 | /* length of negcontexts including pad from end of sec blob to them */ | |
131 | return (len - nc_offset) + size_of_pad_before_neg_ctxts; | |
132 | } | |
136ff1b4 | 133 | |
093b2bda | 134 | int |
98170fb5 | 135 | smb2_check_message(char *buf, unsigned int len, struct TCP_Server_Info *srvr) |
093b2bda | 136 | { |
0d35e382 RS |
137 | struct smb2_hdr *shdr = (struct smb2_hdr *)buf; |
138 | struct smb2_pdu *pdu = (struct smb2_pdu *)shdr; | |
373512ec | 139 | __u64 mid; |
093b2bda PS |
140 | __u32 clc_len; /* calculated length */ |
141 | int command; | |
0d35e382 RS |
142 | int pdu_size = sizeof(struct smb2_pdu); |
143 | int hdr_size = sizeof(struct smb2_hdr); | |
093b2bda PS |
144 | |
145 | /* | |
146 | * Add function to do table lookup of StructureSize by command | |
147 | * ie Validate the wct via smb2_struct_sizes table above | |
148 | */ | |
31473fc4 | 149 | if (shdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) { |
373512ec SF |
150 | struct smb2_transform_hdr *thdr = |
151 | (struct smb2_transform_hdr *)buf; | |
152 | struct cifs_ses *ses = NULL; | |
00c796ee | 153 | struct cifs_ses *iter; |
373512ec SF |
154 | |
155 | /* decrypt frame now that it is completely read in */ | |
156 | spin_lock(&cifs_tcp_ses_lock); | |
00c796ee JK |
157 | list_for_each_entry(iter, &srvr->smb_ses_list, smb_ses_list) { |
158 | if (iter->Suid == le64_to_cpu(thdr->SessionId)) { | |
159 | ses = iter; | |
373512ec | 160 | break; |
00c796ee | 161 | } |
373512ec SF |
162 | } |
163 | spin_unlock(&cifs_tcp_ses_lock); | |
00c796ee | 164 | if (!ses) { |
373512ec SF |
165 | cifs_dbg(VFS, "no decryption - session id not found\n"); |
166 | return 1; | |
167 | } | |
168 | } | |
169 | ||
31473fc4 | 170 | mid = le64_to_cpu(shdr->MessageId); |
98170fb5 RS |
171 | if (len < pdu_size) { |
172 | if ((len >= hdr_size) | |
31473fc4 | 173 | && (shdr->Status != 0)) { |
093b2bda PS |
174 | pdu->StructureSize2 = 0; |
175 | /* | |
176 | * As with SMB/CIFS, on some error cases servers may | |
177 | * not return wct properly | |
178 | */ | |
179 | return 0; | |
180 | } else { | |
f96637be | 181 | cifs_dbg(VFS, "Length less than SMB header size\n"); |
093b2bda PS |
182 | } |
183 | return 1; | |
184 | } | |
1fc6ad2f | 185 | if (len > CIFSMaxBufSize + MAX_SMB2_HDR_SIZE) { |
f96637be JP |
186 | cifs_dbg(VFS, "SMB length greater than maximum, mid=%llu\n", |
187 | mid); | |
093b2bda PS |
188 | return 1; |
189 | } | |
190 | ||
31473fc4 | 191 | if (check_smb2_hdr(shdr, mid)) |
093b2bda PS |
192 | return 1; |
193 | ||
31473fc4 | 194 | if (shdr->StructureSize != SMB2_HEADER_STRUCTURE_SIZE) { |
a0a3036b | 195 | cifs_dbg(VFS, "Invalid structure size %u\n", |
31473fc4 | 196 | le16_to_cpu(shdr->StructureSize)); |
093b2bda PS |
197 | return 1; |
198 | } | |
199 | ||
31473fc4 | 200 | command = le16_to_cpu(shdr->Command); |
093b2bda | 201 | if (command >= NUMBER_OF_SMB2_COMMANDS) { |
a0a3036b | 202 | cifs_dbg(VFS, "Invalid SMB2 command %d\n", command); |
093b2bda PS |
203 | return 1; |
204 | } | |
205 | ||
206 | if (smb2_rsp_struct_sizes[command] != pdu->StructureSize2) { | |
31473fc4 | 207 | if (command != SMB2_OPLOCK_BREAK_HE && (shdr->Status == 0 || |
113be37d | 208 | pdu->StructureSize2 != SMB2_ERROR_STRUCTURE_SIZE2_LE)) { |
093b2bda | 209 | /* error packets have 9 byte structure size */ |
a0a3036b | 210 | cifs_dbg(VFS, "Invalid response size %u for command %d\n", |
f96637be | 211 | le16_to_cpu(pdu->StructureSize2), command); |
093b2bda | 212 | return 1; |
31473fc4 PS |
213 | } else if (command == SMB2_OPLOCK_BREAK_HE |
214 | && (shdr->Status == 0) | |
0822f514 PS |
215 | && (le16_to_cpu(pdu->StructureSize2) != 44) |
216 | && (le16_to_cpu(pdu->StructureSize2) != 36)) { | |
217 | /* special case for SMB2.1 lease break message */ | |
a0a3036b | 218 | cifs_dbg(VFS, "Invalid response size %d for oplock break\n", |
f96637be | 219 | le16_to_cpu(pdu->StructureSize2)); |
0822f514 | 220 | return 1; |
093b2bda PS |
221 | } |
222 | } | |
223 | ||
98170fb5 | 224 | clc_len = smb2_calc_size(buf, srvr); |
093b2bda | 225 | |
136ff1b4 | 226 | if (shdr->Command == SMB2_NEGOTIATE) |
1fc6ad2f | 227 | clc_len += get_neg_ctxt_len(shdr, len, clc_len); |
0fdfef9a | 228 | |
98170fb5 RS |
229 | if (len != clc_len) { |
230 | cifs_dbg(FYI, "Calculated size %u length %u mismatch mid %llu\n", | |
231 | clc_len, len, mid); | |
b42bf888 PS |
232 | /* create failed on symlink */ |
233 | if (command == SMB2_CREATE_HE && | |
31473fc4 | 234 | shdr->Status == STATUS_STOPPED_ON_SYMLINK) |
b42bf888 | 235 | return 0; |
983c88a4 | 236 | /* Windows 7 server returns 24 bytes more */ |
98170fb5 | 237 | if (clc_len + 24 == len && command == SMB2_OPLOCK_BREAK_HE) |
983c88a4 | 238 | return 0; |
754789a1 | 239 | /* server can return one byte more due to implied bcc[0] */ |
98170fb5 | 240 | if (clc_len == len + 1) |
74112860 | 241 | return 0; |
754789a1 | 242 | |
e6c47dd0 RS |
243 | /* |
244 | * Some windows servers (win2016) will pad also the final | |
245 | * PDU in a compound to 8 bytes. | |
246 | */ | |
247 | if (((clc_len + 7) & ~7) == len) | |
248 | return 0; | |
249 | ||
754789a1 SF |
250 | /* |
251 | * MacOS server pads after SMB2.1 write response with 3 bytes | |
252 | * of junk. Other servers match RFC1001 len to actual | |
253 | * SMB2/SMB3 frame length (header + smb2 response specific data) | |
25f25735 | 254 | * Some windows servers also pad up to 8 bytes when compounding. |
754789a1 | 255 | */ |
037d0507 | 256 | if (clc_len < len) |
754789a1 | 257 | return 0; |
037d0507 | 258 | |
25f25735 SF |
259 | pr_warn_once( |
260 | "srv rsp too short, len %d not %d. cmd:%d mid:%llu\n", | |
261 | len, clc_len, command, mid); | |
754789a1 | 262 | |
093b2bda PS |
263 | return 1; |
264 | } | |
265 | return 0; | |
266 | } | |
267 | ||
268 | /* | |
269 | * The size of the variable area depends on the offset and length fields | |
270 | * located in different fields for various SMB2 responses. SMB2 responses | |
271 | * with no variable length info, show an offset of zero for the offset field. | |
272 | */ | |
273 | static const bool has_smb2_data_area[NUMBER_OF_SMB2_COMMANDS] = { | |
274 | /* SMB2_NEGOTIATE */ true, | |
275 | /* SMB2_SESSION_SETUP */ true, | |
276 | /* SMB2_LOGOFF */ false, | |
277 | /* SMB2_TREE_CONNECT */ false, | |
278 | /* SMB2_TREE_DISCONNECT */ false, | |
279 | /* SMB2_CREATE */ true, | |
280 | /* SMB2_CLOSE */ false, | |
281 | /* SMB2_FLUSH */ false, | |
282 | /* SMB2_READ */ true, | |
283 | /* SMB2_WRITE */ false, | |
284 | /* SMB2_LOCK */ false, | |
285 | /* SMB2_IOCTL */ true, | |
286 | /* SMB2_CANCEL */ false, /* BB CHECK this not listed in documentation */ | |
287 | /* SMB2_ECHO */ false, | |
288 | /* SMB2_QUERY_DIRECTORY */ true, | |
289 | /* SMB2_CHANGE_NOTIFY */ true, | |
290 | /* SMB2_QUERY_INFO */ true, | |
291 | /* SMB2_SET_INFO */ false, | |
292 | /* SMB2_OPLOCK_BREAK */ false | |
293 | }; | |
294 | ||
295 | /* | |
296 | * Returns the pointer to the beginning of the data area. Length of the data | |
297 | * area and the offset to it (from the beginning of the smb are also returned. | |
298 | */ | |
ec2e4523 | 299 | char * |
0d35e382 | 300 | smb2_get_data_area_len(int *off, int *len, struct smb2_hdr *shdr) |
093b2bda PS |
301 | { |
302 | *off = 0; | |
303 | *len = 0; | |
304 | ||
305 | /* error responses do not have data area */ | |
31473fc4 | 306 | if (shdr->Status && shdr->Status != STATUS_MORE_PROCESSING_REQUIRED && |
e4dc31fe | 307 | (((struct smb2_err_rsp *)shdr)->StructureSize) == |
113be37d | 308 | SMB2_ERROR_STRUCTURE_SIZE2_LE) |
093b2bda PS |
309 | return NULL; |
310 | ||
311 | /* | |
312 | * Following commands have data areas so we have to get the location | |
313 | * of the data buffer offset and data buffer length for the particular | |
314 | * command. | |
315 | */ | |
31473fc4 | 316 | switch (shdr->Command) { |
093b2bda | 317 | case SMB2_NEGOTIATE: |
ec2e4523 | 318 | *off = le16_to_cpu( |
e4dc31fe | 319 | ((struct smb2_negotiate_rsp *)shdr)->SecurityBufferOffset); |
ec2e4523 | 320 | *len = le16_to_cpu( |
e4dc31fe | 321 | ((struct smb2_negotiate_rsp *)shdr)->SecurityBufferLength); |
ec2e4523 | 322 | break; |
093b2bda | 323 | case SMB2_SESSION_SETUP: |
5478f9ba | 324 | *off = le16_to_cpu( |
e4dc31fe | 325 | ((struct smb2_sess_setup_rsp *)shdr)->SecurityBufferOffset); |
5478f9ba | 326 | *len = le16_to_cpu( |
e4dc31fe | 327 | ((struct smb2_sess_setup_rsp *)shdr)->SecurityBufferLength); |
5478f9ba | 328 | break; |
093b2bda | 329 | case SMB2_CREATE: |
2503a0db | 330 | *off = le32_to_cpu( |
e4dc31fe | 331 | ((struct smb2_create_rsp *)shdr)->CreateContextsOffset); |
2503a0db | 332 | *len = le32_to_cpu( |
e4dc31fe | 333 | ((struct smb2_create_rsp *)shdr)->CreateContextsLength); |
2503a0db | 334 | break; |
093b2bda | 335 | case SMB2_QUERY_INFO: |
be4cb9e3 | 336 | *off = le16_to_cpu( |
e4dc31fe | 337 | ((struct smb2_query_info_rsp *)shdr)->OutputBufferOffset); |
be4cb9e3 | 338 | *len = le32_to_cpu( |
e4dc31fe | 339 | ((struct smb2_query_info_rsp *)shdr)->OutputBufferLength); |
be4cb9e3 PS |
340 | break; |
341 | case SMB2_READ: | |
e4dc31fe RS |
342 | /* TODO: is this a bug ? */ |
343 | *off = ((struct smb2_read_rsp *)shdr)->DataOffset; | |
344 | *len = le32_to_cpu(((struct smb2_read_rsp *)shdr)->DataLength); | |
09a4707e | 345 | break; |
093b2bda | 346 | case SMB2_QUERY_DIRECTORY: |
d324f08d | 347 | *off = le16_to_cpu( |
e4dc31fe | 348 | ((struct smb2_query_directory_rsp *)shdr)->OutputBufferOffset); |
d324f08d | 349 | *len = le32_to_cpu( |
e4dc31fe | 350 | ((struct smb2_query_directory_rsp *)shdr)->OutputBufferLength); |
d324f08d | 351 | break; |
093b2bda | 352 | case SMB2_IOCTL: |
4a72dafa | 353 | *off = le32_to_cpu( |
e4dc31fe RS |
354 | ((struct smb2_ioctl_rsp *)shdr)->OutputOffset); |
355 | *len = le32_to_cpu( | |
356 | ((struct smb2_ioctl_rsp *)shdr)->OutputCount); | |
4a72dafa | 357 | break; |
093b2bda | 358 | case SMB2_CHANGE_NOTIFY: |
8668115c SF |
359 | *off = le16_to_cpu( |
360 | ((struct smb2_change_notify_rsp *)shdr)->OutputBufferOffset); | |
361 | *len = le32_to_cpu( | |
362 | ((struct smb2_change_notify_rsp *)shdr)->OutputBufferLength); | |
363 | break; | |
093b2bda | 364 | default: |
8668115c | 365 | cifs_dbg(VFS, "no length check for command %d\n", le16_to_cpu(shdr->Command)); |
093b2bda PS |
366 | break; |
367 | } | |
368 | ||
369 | /* | |
370 | * Invalid length or offset probably means data area is invalid, but | |
371 | * we have little choice but to ignore the data area in this case. | |
372 | */ | |
373 | if (*off > 4096) { | |
f96637be | 374 | cifs_dbg(VFS, "offset %d too large, data area ignored\n", *off); |
093b2bda PS |
375 | *len = 0; |
376 | *off = 0; | |
377 | } else if (*off < 0) { | |
f96637be JP |
378 | cifs_dbg(VFS, "negative offset %d to data invalid ignore data area\n", |
379 | *off); | |
093b2bda PS |
380 | *off = 0; |
381 | *len = 0; | |
382 | } else if (*len < 0) { | |
f96637be JP |
383 | cifs_dbg(VFS, "negative data length %d invalid, data area ignored\n", |
384 | *len); | |
093b2bda PS |
385 | *len = 0; |
386 | } else if (*len > 128 * 1024) { | |
f96637be | 387 | cifs_dbg(VFS, "data area larger than 128K: %d\n", *len); |
093b2bda PS |
388 | *len = 0; |
389 | } | |
390 | ||
391 | /* return pointer to beginning of data area, ie offset from SMB start */ | |
392 | if ((*off != 0) && (*len != 0)) | |
31473fc4 | 393 | return (char *)shdr + *off; |
093b2bda PS |
394 | else |
395 | return NULL; | |
396 | } | |
397 | ||
398 | /* | |
399 | * Calculate the size of the SMB message based on the fixed header | |
400 | * portion, the number of word parameters and the data portion of the message. | |
401 | */ | |
402 | unsigned int | |
9ec672bd | 403 | smb2_calc_size(void *buf, struct TCP_Server_Info *srvr) |
093b2bda | 404 | { |
0d35e382 RS |
405 | struct smb2_pdu *pdu = (struct smb2_pdu *)buf; |
406 | struct smb2_hdr *shdr = &pdu->hdr; | |
093b2bda PS |
407 | int offset; /* the offset from the beginning of SMB to data area */ |
408 | int data_length; /* the length of the variable length data area */ | |
409 | /* Structure Size has already been checked to make sure it is 64 */ | |
1fc6ad2f | 410 | int len = le16_to_cpu(shdr->StructureSize); |
093b2bda PS |
411 | |
412 | /* | |
413 | * StructureSize2, ie length of fixed parameter area has already | |
414 | * been checked to make sure it is the correct length. | |
415 | */ | |
416 | len += le16_to_cpu(pdu->StructureSize2); | |
417 | ||
31473fc4 | 418 | if (has_smb2_data_area[le16_to_cpu(shdr->Command)] == false) |
093b2bda PS |
419 | goto calc_size_exit; |
420 | ||
e4dc31fe | 421 | smb2_get_data_area_len(&offset, &data_length, shdr); |
f96637be | 422 | cifs_dbg(FYI, "SMB2 data length %d offset %d\n", data_length, offset); |
093b2bda PS |
423 | |
424 | if (data_length > 0) { | |
425 | /* | |
426 | * Check to make sure that data area begins after fixed area, | |
427 | * Note that last byte of the fixed area is part of data area | |
428 | * for some commands, typically those with odd StructureSize, | |
84f0cbfb | 429 | * so we must add one to the calculation. |
093b2bda | 430 | */ |
1fc6ad2f RS |
431 | if (offset + 1 < len) { |
432 | cifs_dbg(VFS, "data area offset %d overlaps SMB2 header %d\n", | |
433 | offset + 1, len); | |
093b2bda PS |
434 | data_length = 0; |
435 | } else { | |
1fc6ad2f | 436 | len = offset + data_length; |
093b2bda PS |
437 | } |
438 | } | |
439 | calc_size_exit: | |
f96637be | 440 | cifs_dbg(FYI, "SMB2 len %d\n", len); |
093b2bda PS |
441 | return len; |
442 | } | |
2503a0db PS |
443 | |
444 | /* Note: caller must free return buffer */ | |
445 | __le16 * | |
446 | cifs_convert_path_to_utf16(const char *from, struct cifs_sb_info *cifs_sb) | |
447 | { | |
448 | int len; | |
449 | const char *start_of_path; | |
450 | __le16 *to; | |
a4153cb1 SF |
451 | int map_type; |
452 | ||
453 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SFM_CHR) | |
454 | map_type = SFM_MAP_UNI_RSVD; | |
455 | else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR) | |
456 | map_type = SFU_MAP_UNI_RSVD; | |
457 | else | |
458 | map_type = NO_MAP_UNI_RSVD; | |
2503a0db PS |
459 | |
460 | /* Windows doesn't allow paths beginning with \ */ | |
461 | if (from[0] == '\\') | |
462 | start_of_path = from + 1; | |
0fdfef9a | 463 | |
ce558b0e | 464 | /* SMB311 POSIX extensions paths do not include leading slash */ |
8ddecf5f | 465 | else if (cifs_sb_master_tlink(cifs_sb) && |
d819d298 SF |
466 | cifs_sb_master_tcon(cifs_sb)->posix_extensions && |
467 | (from[0] == '/')) { | |
ce558b0e | 468 | start_of_path = from + 1; |
0fdfef9a | 469 | } else |
2503a0db | 470 | start_of_path = from; |
ce558b0e | 471 | |
2503a0db | 472 | to = cifs_strndup_to_utf16(start_of_path, PATH_MAX, &len, |
a4153cb1 | 473 | cifs_sb->local_nls, map_type); |
2503a0db PS |
474 | return to; |
475 | } | |
983c88a4 | 476 | |
0822f514 PS |
477 | __le32 |
478 | smb2_get_lease_state(struct cifsInodeInfo *cinode) | |
479 | { | |
53ef1016 | 480 | __le32 lease = 0; |
0822f514 | 481 | |
53ef1016 | 482 | if (CIFS_CACHE_WRITE(cinode)) |
113be37d | 483 | lease |= SMB2_LEASE_WRITE_CACHING_LE; |
53ef1016 | 484 | if (CIFS_CACHE_HANDLE(cinode)) |
113be37d | 485 | lease |= SMB2_LEASE_HANDLE_CACHING_LE; |
53ef1016 | 486 | if (CIFS_CACHE_READ(cinode)) |
113be37d | 487 | lease |= SMB2_LEASE_READ_CACHING_LE; |
53ef1016 | 488 | return lease; |
0822f514 PS |
489 | } |
490 | ||
233839b1 PS |
491 | struct smb2_lease_break_work { |
492 | struct work_struct lease_break; | |
493 | struct tcon_link *tlink; | |
494 | __u8 lease_key[16]; | |
495 | __le32 lease_state; | |
496 | }; | |
497 | ||
498 | static void | |
499 | cifs_ses_oplock_break(struct work_struct *work) | |
500 | { | |
501 | struct smb2_lease_break_work *lw = container_of(work, | |
502 | struct smb2_lease_break_work, lease_break); | |
a93864d9 | 503 | int rc = 0; |
233839b1 PS |
504 | |
505 | rc = SMB2_lease_break(0, tlink_tcon(lw->tlink), lw->lease_key, | |
506 | lw->lease_state); | |
a93864d9 | 507 | |
f96637be | 508 | cifs_dbg(FYI, "Lease release rc %d\n", rc); |
233839b1 PS |
509 | cifs_put_tlink(lw->tlink); |
510 | kfree(lw); | |
511 | } | |
512 | ||
baf57b56 PA |
513 | static void |
514 | smb2_queue_pending_open_break(struct tcon_link *tlink, __u8 *lease_key, | |
515 | __le32 new_lease_state) | |
516 | { | |
517 | struct smb2_lease_break_work *lw; | |
518 | ||
519 | lw = kmalloc(sizeof(struct smb2_lease_break_work), GFP_KERNEL); | |
520 | if (!lw) { | |
521 | cifs_put_tlink(tlink); | |
522 | return; | |
523 | } | |
524 | ||
525 | INIT_WORK(&lw->lease_break, cifs_ses_oplock_break); | |
526 | lw->tlink = tlink; | |
527 | lw->lease_state = new_lease_state; | |
528 | memcpy(lw->lease_key, lease_key, SMB2_LEASE_KEY_SIZE); | |
529 | queue_work(cifsiod_wq, &lw->lease_break); | |
530 | } | |
531 | ||
0822f514 | 532 | static bool |
baf57b56 | 533 | smb2_tcon_has_lease(struct cifs_tcon *tcon, struct smb2_lease_break *rsp) |
933d4b36 | 534 | { |
933d4b36 | 535 | __u8 lease_state; |
933d4b36 | 536 | struct cifsFileInfo *cfile; |
933d4b36 PS |
537 | struct cifsInodeInfo *cinode; |
538 | int ack_req = le32_to_cpu(rsp->Flags & | |
539 | SMB2_NOTIFY_BREAK_LEASE_FLAG_ACK_REQUIRED); | |
540 | ||
53ef1016 | 541 | lease_state = le32_to_cpu(rsp->NewLeaseState); |
933d4b36 | 542 | |
647f5927 | 543 | list_for_each_entry(cfile, &tcon->openFileList, tlist) { |
2b0143b5 | 544 | cinode = CIFS_I(d_inode(cfile->dentry)); |
933d4b36 PS |
545 | |
546 | if (memcmp(cinode->lease_key, rsp->LeaseKey, | |
547 | SMB2_LEASE_KEY_SIZE)) | |
548 | continue; | |
549 | ||
550 | cifs_dbg(FYI, "found in the open list\n"); | |
59b04c5d | 551 | cifs_dbg(FYI, "lease key match, lease break 0x%x\n", |
9bd45408 | 552 | lease_state); |
933d4b36 | 553 | |
933d4b36 PS |
554 | if (ack_req) |
555 | cfile->oplock_break_cancelled = false; | |
556 | else | |
557 | cfile->oplock_break_cancelled = true; | |
558 | ||
7b9b9edb PS |
559 | set_bit(CIFS_INODE_PENDING_OPLOCK_BREAK, &cinode->flags); |
560 | ||
9bd45408 PS |
561 | cfile->oplock_epoch = le16_to_cpu(rsp->Epoch); |
562 | cfile->oplock_level = lease_state; | |
7b9b9edb | 563 | |
b98749ca | 564 | cifs_queue_oplock_break(cfile); |
933d4b36 PS |
565 | return true; |
566 | } | |
567 | ||
baf57b56 PA |
568 | return false; |
569 | } | |
570 | ||
571 | static struct cifs_pending_open * | |
572 | smb2_tcon_find_pending_open_lease(struct cifs_tcon *tcon, | |
573 | struct smb2_lease_break *rsp) | |
574 | { | |
575 | __u8 lease_state = le32_to_cpu(rsp->NewLeaseState); | |
576 | int ack_req = le32_to_cpu(rsp->Flags & | |
577 | SMB2_NOTIFY_BREAK_LEASE_FLAG_ACK_REQUIRED); | |
578 | struct cifs_pending_open *open; | |
579 | struct cifs_pending_open *found = NULL; | |
580 | ||
933d4b36 PS |
581 | list_for_each_entry(open, &tcon->pending_opens, olist) { |
582 | if (memcmp(open->lease_key, rsp->LeaseKey, | |
583 | SMB2_LEASE_KEY_SIZE)) | |
584 | continue; | |
585 | ||
586 | if (!found && ack_req) { | |
baf57b56 | 587 | found = open; |
933d4b36 PS |
588 | } |
589 | ||
590 | cifs_dbg(FYI, "found in the pending open list\n"); | |
59b04c5d | 591 | cifs_dbg(FYI, "lease key match, lease break 0x%x\n", |
9bd45408 | 592 | lease_state); |
933d4b36 PS |
593 | |
594 | open->oplock = lease_state; | |
595 | } | |
a93864d9 | 596 | |
933d4b36 PS |
597 | return found; |
598 | } | |
599 | ||
600 | static bool | |
601 | smb2_is_valid_lease_break(char *buffer) | |
0822f514 PS |
602 | { |
603 | struct smb2_lease_break *rsp = (struct smb2_lease_break *)buffer; | |
933d4b36 | 604 | struct TCP_Server_Info *server; |
0822f514 PS |
605 | struct cifs_ses *ses; |
606 | struct cifs_tcon *tcon; | |
baf57b56 | 607 | struct cifs_pending_open *open; |
0822f514 | 608 | |
f96637be | 609 | cifs_dbg(FYI, "Checking for lease break\n"); |
0822f514 PS |
610 | |
611 | /* look up tcon based on tid & uid */ | |
612 | spin_lock(&cifs_tcp_ses_lock); | |
647f5927 BL |
613 | list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) { |
614 | list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) { | |
615 | list_for_each_entry(tcon, &ses->tcon_list, tcon_list) { | |
3afca265 | 616 | spin_lock(&tcon->open_file_lock); |
933d4b36 PS |
617 | cifs_stats_inc( |
618 | &tcon->stats.cifs_stats.num_oplock_brks); | |
baf57b56 | 619 | if (smb2_tcon_has_lease(tcon, rsp)) { |
3afca265 | 620 | spin_unlock(&tcon->open_file_lock); |
933d4b36 PS |
621 | spin_unlock(&cifs_tcp_ses_lock); |
622 | return true; | |
233839b1 | 623 | } |
baf57b56 PA |
624 | open = smb2_tcon_find_pending_open_lease(tcon, |
625 | rsp); | |
626 | if (open) { | |
627 | __u8 lease_key[SMB2_LEASE_KEY_SIZE]; | |
628 | struct tcon_link *tlink; | |
629 | ||
630 | tlink = cifs_get_tlink(open->tlink); | |
631 | memcpy(lease_key, open->lease_key, | |
632 | SMB2_LEASE_KEY_SIZE); | |
633 | spin_unlock(&tcon->open_file_lock); | |
634 | spin_unlock(&cifs_tcp_ses_lock); | |
635 | smb2_queue_pending_open_break(tlink, | |
636 | lease_key, | |
637 | rsp->NewLeaseState); | |
638 | return true; | |
639 | } | |
3afca265 | 640 | spin_unlock(&tcon->open_file_lock); |
a93864d9 RS |
641 | |
642 | if (tcon->crfid.is_valid && | |
643 | !memcmp(rsp->LeaseKey, | |
644 | tcon->crfid.fid->lease_key, | |
645 | SMB2_LEASE_KEY_SIZE)) { | |
ed20f54a | 646 | tcon->crfid.time = 0; |
a93864d9 RS |
647 | INIT_WORK(&tcon->crfid.lease_break, |
648 | smb2_cached_lease_break); | |
649 | queue_work(cifsiod_wq, | |
650 | &tcon->crfid.lease_break); | |
651 | spin_unlock(&cifs_tcp_ses_lock); | |
652 | return true; | |
653 | } | |
233839b1 | 654 | } |
0822f514 PS |
655 | } |
656 | } | |
657 | spin_unlock(&cifs_tcp_ses_lock); | |
f96637be | 658 | cifs_dbg(FYI, "Can not process lease break - no lease matched\n"); |
fb253d5b SF |
659 | trace_smb3_lease_not_found(le32_to_cpu(rsp->CurrentLeaseState), |
660 | le32_to_cpu(rsp->hdr.Id.SyncId.TreeId), | |
661 | le64_to_cpu(rsp->hdr.SessionId), | |
662 | *((u64 *)rsp->LeaseKey), | |
663 | *((u64 *)&rsp->LeaseKey[8])); | |
664 | ||
0822f514 PS |
665 | return false; |
666 | } | |
667 | ||
983c88a4 PS |
668 | bool |
669 | smb2_is_valid_oplock_break(char *buffer, struct TCP_Server_Info *server) | |
670 | { | |
0d5a288d | 671 | struct smb2_oplock_break *rsp = (struct smb2_oplock_break *)buffer; |
983c88a4 PS |
672 | struct cifs_ses *ses; |
673 | struct cifs_tcon *tcon; | |
674 | struct cifsInodeInfo *cinode; | |
675 | struct cifsFileInfo *cfile; | |
676 | ||
f96637be | 677 | cifs_dbg(FYI, "Checking for oplock break\n"); |
983c88a4 | 678 | |
0d35e382 | 679 | if (rsp->hdr.Command != SMB2_OPLOCK_BREAK) |
983c88a4 PS |
680 | return false; |
681 | ||
12e8a208 | 682 | if (rsp->StructureSize != |
983c88a4 | 683 | smb2_rsp_struct_sizes[SMB2_OPLOCK_BREAK_HE]) { |
0822f514 | 684 | if (le16_to_cpu(rsp->StructureSize) == 44) |
933d4b36 | 685 | return smb2_is_valid_lease_break(buffer); |
0822f514 PS |
686 | else |
687 | return false; | |
983c88a4 PS |
688 | } |
689 | ||
59b04c5d | 690 | cifs_dbg(FYI, "oplock level 0x%x\n", rsp->OplockLevel); |
983c88a4 PS |
691 | |
692 | /* look up tcon based on tid & uid */ | |
693 | spin_lock(&cifs_tcp_ses_lock); | |
647f5927 BL |
694 | list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) { |
695 | list_for_each_entry(tcon, &ses->tcon_list, tcon_list) { | |
983c88a4 | 696 | |
3afca265 | 697 | spin_lock(&tcon->open_file_lock); |
647f5927 | 698 | list_for_each_entry(cfile, &tcon->openFileList, tlist) { |
983c88a4 PS |
699 | if (rsp->PersistentFid != |
700 | cfile->fid.persistent_fid || | |
701 | rsp->VolatileFid != | |
702 | cfile->fid.volatile_fid) | |
703 | continue; | |
704 | ||
f96637be | 705 | cifs_dbg(FYI, "file id match, oplock break\n"); |
fa9c2362 PS |
706 | cifs_stats_inc( |
707 | &tcon->stats.cifs_stats.num_oplock_brks); | |
2b0143b5 | 708 | cinode = CIFS_I(d_inode(cfile->dentry)); |
3afca265 | 709 | spin_lock(&cfile->file_info_lock); |
18cceb6a | 710 | if (!CIFS_CACHE_WRITE(cinode) && |
983c88a4 PS |
711 | rsp->OplockLevel == SMB2_OPLOCK_LEVEL_NONE) |
712 | cfile->oplock_break_cancelled = true; | |
713 | else | |
714 | cfile->oplock_break_cancelled = false; | |
715 | ||
c11f1df5 SP |
716 | set_bit(CIFS_INODE_PENDING_OPLOCK_BREAK, |
717 | &cinode->flags); | |
718 | ||
9bd45408 PS |
719 | cfile->oplock_epoch = 0; |
720 | cfile->oplock_level = rsp->OplockLevel; | |
721 | ||
3afca265 | 722 | spin_unlock(&cfile->file_info_lock); |
b98749ca AA |
723 | |
724 | cifs_queue_oplock_break(cfile); | |
983c88a4 | 725 | |
3afca265 | 726 | spin_unlock(&tcon->open_file_lock); |
983c88a4 PS |
727 | spin_unlock(&cifs_tcp_ses_lock); |
728 | return true; | |
729 | } | |
3afca265 | 730 | spin_unlock(&tcon->open_file_lock); |
983c88a4 PS |
731 | } |
732 | } | |
733 | spin_unlock(&cifs_tcp_ses_lock); | |
219481a8 VW |
734 | cifs_dbg(FYI, "No file id matched, oplock break ignored\n"); |
735 | return true; | |
983c88a4 | 736 | } |
38bd4906 SP |
737 | |
738 | void | |
739 | smb2_cancelled_close_fid(struct work_struct *work) | |
740 | { | |
741 | struct close_cancelled_open *cancelled = container_of(work, | |
742 | struct close_cancelled_open, work); | |
87bc2376 RS |
743 | struct cifs_tcon *tcon = cancelled->tcon; |
744 | int rc; | |
745 | ||
746 | if (cancelled->mid) | |
bf1bc694 | 747 | cifs_tcon_dbg(VFS, "Close unmatched open for MID:%llu\n", |
87bc2376 RS |
748 | cancelled->mid); |
749 | else | |
750 | cifs_tcon_dbg(VFS, "Close interrupted close\n"); | |
38bd4906 | 751 | |
87bc2376 RS |
752 | rc = SMB2_close(0, tcon, cancelled->fid.persistent_fid, |
753 | cancelled->fid.volatile_fid); | |
754 | if (rc) | |
755 | cifs_tcon_dbg(VFS, "Close cancelled mid failed rc:%d\n", rc); | |
38bd4906 | 756 | |
87bc2376 | 757 | cifs_put_tcon(tcon); |
38bd4906 SP |
758 | kfree(cancelled); |
759 | } | |
760 | ||
87bc2376 RS |
761 | /* |
762 | * Caller should already has an extra reference to @tcon | |
763 | * This function is used to queue work to close a handle to prevent leaks | |
764 | * on the server. | |
765 | * We handle two cases. If an open was interrupted after we sent the | |
766 | * SMB2_CREATE to the server but before we processed the reply, and second | |
767 | * if a close was interrupted before we sent the SMB2_CLOSE to the server. | |
768 | */ | |
9150c3ad | 769 | static int |
87bc2376 RS |
770 | __smb2_handle_cancelled_cmd(struct cifs_tcon *tcon, __u16 cmd, __u64 mid, |
771 | __u64 persistent_fid, __u64 volatile_fid) | |
9150c3ad PS |
772 | { |
773 | struct close_cancelled_open *cancelled; | |
774 | ||
0a5a9886 | 775 | cancelled = kzalloc(sizeof(*cancelled), GFP_ATOMIC); |
9150c3ad PS |
776 | if (!cancelled) |
777 | return -ENOMEM; | |
778 | ||
779 | cancelled->fid.persistent_fid = persistent_fid; | |
780 | cancelled->fid.volatile_fid = volatile_fid; | |
781 | cancelled->tcon = tcon; | |
87bc2376 RS |
782 | cancelled->cmd = cmd; |
783 | cancelled->mid = mid; | |
9150c3ad PS |
784 | INIT_WORK(&cancelled->work, smb2_cancelled_close_fid); |
785 | WARN_ON(queue_work(cifsiod_wq, &cancelled->work) == false); | |
786 | ||
787 | return 0; | |
788 | } | |
789 | ||
790 | int | |
791 | smb2_handle_cancelled_close(struct cifs_tcon *tcon, __u64 persistent_fid, | |
792 | __u64 volatile_fid) | |
793 | { | |
794 | int rc; | |
795 | ||
796 | cifs_dbg(FYI, "%s: tc_count=%d\n", __func__, tcon->tc_count); | |
797 | spin_lock(&cifs_tcp_ses_lock); | |
e79b0332 AA |
798 | if (tcon->tc_count <= 0) { |
799 | struct TCP_Server_Info *server = NULL; | |
800 | ||
801 | WARN_ONCE(tcon->tc_count < 0, "tcon refcount is negative"); | |
802 | spin_unlock(&cifs_tcp_ses_lock); | |
803 | ||
804 | if (tcon->ses) | |
805 | server = tcon->ses->server; | |
806 | ||
71081e7a | 807 | cifs_server_dbg(FYI, "tid=0x%x: tcon is closing, skipping async close retry of fid %llu %llu\n", |
e79b0332 AA |
808 | tcon->tid, persistent_fid, volatile_fid); |
809 | ||
810 | return 0; | |
811 | } | |
9150c3ad PS |
812 | tcon->tc_count++; |
813 | spin_unlock(&cifs_tcp_ses_lock); | |
814 | ||
87bc2376 RS |
815 | rc = __smb2_handle_cancelled_cmd(tcon, SMB2_CLOSE_HE, 0, |
816 | persistent_fid, volatile_fid); | |
9150c3ad PS |
817 | if (rc) |
818 | cifs_put_tcon(tcon); | |
819 | ||
820 | return rc; | |
821 | } | |
822 | ||
38bd4906 | 823 | int |
04ad69c3 | 824 | smb2_handle_cancelled_mid(struct mid_q_entry *mid, struct TCP_Server_Info *server) |
38bd4906 | 825 | { |
0d35e382 | 826 | struct smb2_hdr *hdr = mid->resp_buf; |
04ad69c3 | 827 | struct smb2_create_rsp *rsp = mid->resp_buf; |
38bd4906 | 828 | struct cifs_tcon *tcon; |
9150c3ad | 829 | int rc; |
38bd4906 | 830 | |
0d35e382 RS |
831 | if ((mid->optype & CIFS_CP_CREATE_CLOSE_OP) || hdr->Command != SMB2_CREATE || |
832 | hdr->Status != STATUS_SUCCESS) | |
38bd4906 SP |
833 | return 0; |
834 | ||
0d35e382 RS |
835 | tcon = smb2_find_smb_tcon(server, le64_to_cpu(hdr->SessionId), |
836 | le32_to_cpu(hdr->Id.SyncId.TreeId)); | |
9150c3ad | 837 | if (!tcon) |
38bd4906 | 838 | return -ENOENT; |
38bd4906 | 839 | |
87bc2376 | 840 | rc = __smb2_handle_cancelled_cmd(tcon, |
0d35e382 RS |
841 | le16_to_cpu(hdr->Command), |
842 | le64_to_cpu(hdr->MessageId), | |
351a59da PA |
843 | rsp->PersistentFileId, |
844 | rsp->VolatileFileId); | |
9150c3ad PS |
845 | if (rc) |
846 | cifs_put_tcon(tcon); | |
38bd4906 | 847 | |
9150c3ad | 848 | return rc; |
38bd4906 | 849 | } |
8bd68c6e | 850 | |
8bd68c6e AA |
851 | /** |
852 | * smb311_update_preauth_hash - update @ses hash with the packet data in @iov | |
853 | * | |
854 | * Assumes @iov does not contain the rfc1002 length and iov[0] has the | |
855 | * SMB2 header. | |
607dfc79 SF |
856 | * |
857 | * @ses: server session structure | |
3ac5f2f2 | 858 | * @server: pointer to server info |
607dfc79 SF |
859 | * @iov: array containing the SMB request we will send to the server |
860 | * @nvec: number of array entries for the iov | |
8bd68c6e AA |
861 | */ |
862 | int | |
f486ef8e SP |
863 | smb311_update_preauth_hash(struct cifs_ses *ses, struct TCP_Server_Info *server, |
864 | struct kvec *iov, int nvec) | |
8bd68c6e AA |
865 | { |
866 | int i, rc; | |
867 | struct sdesc *d; | |
0d35e382 | 868 | struct smb2_hdr *hdr; |
8bd68c6e | 869 | |
0d35e382 | 870 | hdr = (struct smb2_hdr *)iov[0].iov_base; |
d70e9fa5 AA |
871 | /* neg prot are always taken */ |
872 | if (hdr->Command == SMB2_NEGOTIATE) | |
873 | goto ok; | |
8bd68c6e | 874 | |
d70e9fa5 AA |
875 | /* |
876 | * If we process a command which wasn't a negprot it means the | |
877 | * neg prot was already done, so the server dialect was set | |
878 | * and we can test it. Preauth requires 3.1.1 for now. | |
879 | */ | |
880 | if (server->dialect != SMB311_PROT_ID) | |
881 | return 0; | |
882 | ||
883 | if (hdr->Command != SMB2_SESSION_SETUP) | |
884 | return 0; | |
885 | ||
886 | /* skip last sess setup response */ | |
887 | if ((hdr->Flags & SMB2_FLAGS_SERVER_TO_REDIR) | |
888 | && (hdr->Status == NT_STATUS_OK | |
889 | || (hdr->Status != | |
890 | cpu_to_le32(NT_STATUS_MORE_PROCESSING_REQUIRED)))) | |
891 | return 0; | |
8bd68c6e | 892 | |
d70e9fa5 AA |
893 | ok: |
894 | rc = smb311_crypto_shash_allocate(server); | |
8bd68c6e AA |
895 | if (rc) |
896 | return rc; | |
897 | ||
d70e9fa5 | 898 | d = server->secmech.sdescsha512; |
8bd68c6e AA |
899 | rc = crypto_shash_init(&d->shash); |
900 | if (rc) { | |
a0a3036b | 901 | cifs_dbg(VFS, "%s: Could not init sha512 shash\n", __func__); |
8bd68c6e AA |
902 | return rc; |
903 | } | |
904 | ||
905 | rc = crypto_shash_update(&d->shash, ses->preauth_sha_hash, | |
906 | SMB2_PREAUTH_HASH_SIZE); | |
907 | if (rc) { | |
a0a3036b | 908 | cifs_dbg(VFS, "%s: Could not update sha512 shash\n", __func__); |
8bd68c6e AA |
909 | return rc; |
910 | } | |
911 | ||
912 | for (i = 0; i < nvec; i++) { | |
913 | rc = crypto_shash_update(&d->shash, | |
914 | iov[i].iov_base, iov[i].iov_len); | |
915 | if (rc) { | |
a0a3036b | 916 | cifs_dbg(VFS, "%s: Could not update sha512 shash\n", |
8bd68c6e AA |
917 | __func__); |
918 | return rc; | |
919 | } | |
920 | } | |
921 | ||
922 | rc = crypto_shash_final(&d->shash, ses->preauth_sha_hash); | |
923 | if (rc) { | |
a0a3036b | 924 | cifs_dbg(VFS, "%s: Could not finalize sha512 shash\n", |
8bd68c6e AA |
925 | __func__); |
926 | return rc; | |
927 | } | |
928 | ||
929 | return 0; | |
930 | } |