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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; | |
373512ec SF |
153 | |
154 | /* decrypt frame now that it is completely read in */ | |
155 | spin_lock(&cifs_tcp_ses_lock); | |
647f5927 | 156 | list_for_each_entry(ses, &srvr->smb_ses_list, smb_ses_list) { |
0d35e382 | 157 | if (ses->Suid == le64_to_cpu(thdr->SessionId)) |
373512ec | 158 | break; |
373512ec SF |
159 | } |
160 | spin_unlock(&cifs_tcp_ses_lock); | |
1689b0b5 DC |
161 | if (list_entry_is_head(ses, &srvr->smb_ses_list, |
162 | smb_ses_list)) { | |
373512ec SF |
163 | cifs_dbg(VFS, "no decryption - session id not found\n"); |
164 | return 1; | |
165 | } | |
166 | } | |
167 | ||
31473fc4 | 168 | mid = le64_to_cpu(shdr->MessageId); |
98170fb5 RS |
169 | if (len < pdu_size) { |
170 | if ((len >= hdr_size) | |
31473fc4 | 171 | && (shdr->Status != 0)) { |
093b2bda PS |
172 | pdu->StructureSize2 = 0; |
173 | /* | |
174 | * As with SMB/CIFS, on some error cases servers may | |
175 | * not return wct properly | |
176 | */ | |
177 | return 0; | |
178 | } else { | |
f96637be | 179 | cifs_dbg(VFS, "Length less than SMB header size\n"); |
093b2bda PS |
180 | } |
181 | return 1; | |
182 | } | |
1fc6ad2f | 183 | if (len > CIFSMaxBufSize + MAX_SMB2_HDR_SIZE) { |
f96637be JP |
184 | cifs_dbg(VFS, "SMB length greater than maximum, mid=%llu\n", |
185 | mid); | |
093b2bda PS |
186 | return 1; |
187 | } | |
188 | ||
31473fc4 | 189 | if (check_smb2_hdr(shdr, mid)) |
093b2bda PS |
190 | return 1; |
191 | ||
31473fc4 | 192 | if (shdr->StructureSize != SMB2_HEADER_STRUCTURE_SIZE) { |
a0a3036b | 193 | cifs_dbg(VFS, "Invalid structure size %u\n", |
31473fc4 | 194 | le16_to_cpu(shdr->StructureSize)); |
093b2bda PS |
195 | return 1; |
196 | } | |
197 | ||
31473fc4 | 198 | command = le16_to_cpu(shdr->Command); |
093b2bda | 199 | if (command >= NUMBER_OF_SMB2_COMMANDS) { |
a0a3036b | 200 | cifs_dbg(VFS, "Invalid SMB2 command %d\n", command); |
093b2bda PS |
201 | return 1; |
202 | } | |
203 | ||
204 | if (smb2_rsp_struct_sizes[command] != pdu->StructureSize2) { | |
31473fc4 | 205 | if (command != SMB2_OPLOCK_BREAK_HE && (shdr->Status == 0 || |
983c88a4 | 206 | pdu->StructureSize2 != SMB2_ERROR_STRUCTURE_SIZE2)) { |
093b2bda | 207 | /* error packets have 9 byte structure size */ |
a0a3036b | 208 | cifs_dbg(VFS, "Invalid response size %u for command %d\n", |
f96637be | 209 | le16_to_cpu(pdu->StructureSize2), command); |
093b2bda | 210 | return 1; |
31473fc4 PS |
211 | } else if (command == SMB2_OPLOCK_BREAK_HE |
212 | && (shdr->Status == 0) | |
0822f514 PS |
213 | && (le16_to_cpu(pdu->StructureSize2) != 44) |
214 | && (le16_to_cpu(pdu->StructureSize2) != 36)) { | |
215 | /* special case for SMB2.1 lease break message */ | |
a0a3036b | 216 | cifs_dbg(VFS, "Invalid response size %d for oplock break\n", |
f96637be | 217 | le16_to_cpu(pdu->StructureSize2)); |
0822f514 | 218 | return 1; |
093b2bda PS |
219 | } |
220 | } | |
221 | ||
98170fb5 | 222 | clc_len = smb2_calc_size(buf, srvr); |
093b2bda | 223 | |
136ff1b4 | 224 | if (shdr->Command == SMB2_NEGOTIATE) |
1fc6ad2f | 225 | clc_len += get_neg_ctxt_len(shdr, len, clc_len); |
0fdfef9a | 226 | |
98170fb5 RS |
227 | if (len != clc_len) { |
228 | cifs_dbg(FYI, "Calculated size %u length %u mismatch mid %llu\n", | |
229 | clc_len, len, mid); | |
b42bf888 PS |
230 | /* create failed on symlink */ |
231 | if (command == SMB2_CREATE_HE && | |
31473fc4 | 232 | shdr->Status == STATUS_STOPPED_ON_SYMLINK) |
b42bf888 | 233 | return 0; |
983c88a4 | 234 | /* Windows 7 server returns 24 bytes more */ |
98170fb5 | 235 | if (clc_len + 24 == len && command == SMB2_OPLOCK_BREAK_HE) |
983c88a4 | 236 | return 0; |
754789a1 | 237 | /* server can return one byte more due to implied bcc[0] */ |
98170fb5 | 238 | if (clc_len == len + 1) |
74112860 | 239 | return 0; |
754789a1 | 240 | |
e6c47dd0 RS |
241 | /* |
242 | * Some windows servers (win2016) will pad also the final | |
243 | * PDU in a compound to 8 bytes. | |
244 | */ | |
245 | if (((clc_len + 7) & ~7) == len) | |
246 | return 0; | |
247 | ||
754789a1 SF |
248 | /* |
249 | * MacOS server pads after SMB2.1 write response with 3 bytes | |
250 | * of junk. Other servers match RFC1001 len to actual | |
251 | * SMB2/SMB3 frame length (header + smb2 response specific data) | |
25f25735 | 252 | * Some windows servers also pad up to 8 bytes when compounding. |
754789a1 | 253 | */ |
037d0507 | 254 | if (clc_len < len) |
754789a1 | 255 | return 0; |
037d0507 | 256 | |
25f25735 SF |
257 | pr_warn_once( |
258 | "srv rsp too short, len %d not %d. cmd:%d mid:%llu\n", | |
259 | len, clc_len, command, mid); | |
754789a1 | 260 | |
093b2bda PS |
261 | return 1; |
262 | } | |
263 | return 0; | |
264 | } | |
265 | ||
266 | /* | |
267 | * The size of the variable area depends on the offset and length fields | |
268 | * located in different fields for various SMB2 responses. SMB2 responses | |
269 | * with no variable length info, show an offset of zero for the offset field. | |
270 | */ | |
271 | static const bool has_smb2_data_area[NUMBER_OF_SMB2_COMMANDS] = { | |
272 | /* SMB2_NEGOTIATE */ true, | |
273 | /* SMB2_SESSION_SETUP */ true, | |
274 | /* SMB2_LOGOFF */ false, | |
275 | /* SMB2_TREE_CONNECT */ false, | |
276 | /* SMB2_TREE_DISCONNECT */ false, | |
277 | /* SMB2_CREATE */ true, | |
278 | /* SMB2_CLOSE */ false, | |
279 | /* SMB2_FLUSH */ false, | |
280 | /* SMB2_READ */ true, | |
281 | /* SMB2_WRITE */ false, | |
282 | /* SMB2_LOCK */ false, | |
283 | /* SMB2_IOCTL */ true, | |
284 | /* SMB2_CANCEL */ false, /* BB CHECK this not listed in documentation */ | |
285 | /* SMB2_ECHO */ false, | |
286 | /* SMB2_QUERY_DIRECTORY */ true, | |
287 | /* SMB2_CHANGE_NOTIFY */ true, | |
288 | /* SMB2_QUERY_INFO */ true, | |
289 | /* SMB2_SET_INFO */ false, | |
290 | /* SMB2_OPLOCK_BREAK */ false | |
291 | }; | |
292 | ||
293 | /* | |
294 | * Returns the pointer to the beginning of the data area. Length of the data | |
295 | * area and the offset to it (from the beginning of the smb are also returned. | |
296 | */ | |
ec2e4523 | 297 | char * |
0d35e382 | 298 | smb2_get_data_area_len(int *off, int *len, struct smb2_hdr *shdr) |
093b2bda PS |
299 | { |
300 | *off = 0; | |
301 | *len = 0; | |
302 | ||
303 | /* error responses do not have data area */ | |
31473fc4 | 304 | if (shdr->Status && shdr->Status != STATUS_MORE_PROCESSING_REQUIRED && |
e4dc31fe | 305 | (((struct smb2_err_rsp *)shdr)->StructureSize) == |
093b2bda PS |
306 | SMB2_ERROR_STRUCTURE_SIZE2) |
307 | return NULL; | |
308 | ||
309 | /* | |
310 | * Following commands have data areas so we have to get the location | |
311 | * of the data buffer offset and data buffer length for the particular | |
312 | * command. | |
313 | */ | |
31473fc4 | 314 | switch (shdr->Command) { |
093b2bda | 315 | case SMB2_NEGOTIATE: |
ec2e4523 | 316 | *off = le16_to_cpu( |
e4dc31fe | 317 | ((struct smb2_negotiate_rsp *)shdr)->SecurityBufferOffset); |
ec2e4523 | 318 | *len = le16_to_cpu( |
e4dc31fe | 319 | ((struct smb2_negotiate_rsp *)shdr)->SecurityBufferLength); |
ec2e4523 | 320 | break; |
093b2bda | 321 | case SMB2_SESSION_SETUP: |
5478f9ba | 322 | *off = le16_to_cpu( |
e4dc31fe | 323 | ((struct smb2_sess_setup_rsp *)shdr)->SecurityBufferOffset); |
5478f9ba | 324 | *len = le16_to_cpu( |
e4dc31fe | 325 | ((struct smb2_sess_setup_rsp *)shdr)->SecurityBufferLength); |
5478f9ba | 326 | break; |
093b2bda | 327 | case SMB2_CREATE: |
2503a0db | 328 | *off = le32_to_cpu( |
e4dc31fe | 329 | ((struct smb2_create_rsp *)shdr)->CreateContextsOffset); |
2503a0db | 330 | *len = le32_to_cpu( |
e4dc31fe | 331 | ((struct smb2_create_rsp *)shdr)->CreateContextsLength); |
2503a0db | 332 | break; |
093b2bda | 333 | case SMB2_QUERY_INFO: |
be4cb9e3 | 334 | *off = le16_to_cpu( |
e4dc31fe | 335 | ((struct smb2_query_info_rsp *)shdr)->OutputBufferOffset); |
be4cb9e3 | 336 | *len = le32_to_cpu( |
e4dc31fe | 337 | ((struct smb2_query_info_rsp *)shdr)->OutputBufferLength); |
be4cb9e3 PS |
338 | break; |
339 | case SMB2_READ: | |
e4dc31fe RS |
340 | /* TODO: is this a bug ? */ |
341 | *off = ((struct smb2_read_rsp *)shdr)->DataOffset; | |
342 | *len = le32_to_cpu(((struct smb2_read_rsp *)shdr)->DataLength); | |
09a4707e | 343 | break; |
093b2bda | 344 | case SMB2_QUERY_DIRECTORY: |
d324f08d | 345 | *off = le16_to_cpu( |
e4dc31fe | 346 | ((struct smb2_query_directory_rsp *)shdr)->OutputBufferOffset); |
d324f08d | 347 | *len = le32_to_cpu( |
e4dc31fe | 348 | ((struct smb2_query_directory_rsp *)shdr)->OutputBufferLength); |
d324f08d | 349 | break; |
093b2bda | 350 | case SMB2_IOCTL: |
4a72dafa | 351 | *off = le32_to_cpu( |
e4dc31fe RS |
352 | ((struct smb2_ioctl_rsp *)shdr)->OutputOffset); |
353 | *len = le32_to_cpu( | |
354 | ((struct smb2_ioctl_rsp *)shdr)->OutputCount); | |
4a72dafa | 355 | break; |
093b2bda | 356 | case SMB2_CHANGE_NOTIFY: |
8668115c SF |
357 | *off = le16_to_cpu( |
358 | ((struct smb2_change_notify_rsp *)shdr)->OutputBufferOffset); | |
359 | *len = le32_to_cpu( | |
360 | ((struct smb2_change_notify_rsp *)shdr)->OutputBufferLength); | |
361 | break; | |
093b2bda | 362 | default: |
8668115c | 363 | cifs_dbg(VFS, "no length check for command %d\n", le16_to_cpu(shdr->Command)); |
093b2bda PS |
364 | break; |
365 | } | |
366 | ||
367 | /* | |
368 | * Invalid length or offset probably means data area is invalid, but | |
369 | * we have little choice but to ignore the data area in this case. | |
370 | */ | |
371 | if (*off > 4096) { | |
f96637be | 372 | cifs_dbg(VFS, "offset %d too large, data area ignored\n", *off); |
093b2bda PS |
373 | *len = 0; |
374 | *off = 0; | |
375 | } else if (*off < 0) { | |
f96637be JP |
376 | cifs_dbg(VFS, "negative offset %d to data invalid ignore data area\n", |
377 | *off); | |
093b2bda PS |
378 | *off = 0; |
379 | *len = 0; | |
380 | } else if (*len < 0) { | |
f96637be JP |
381 | cifs_dbg(VFS, "negative data length %d invalid, data area ignored\n", |
382 | *len); | |
093b2bda PS |
383 | *len = 0; |
384 | } else if (*len > 128 * 1024) { | |
f96637be | 385 | cifs_dbg(VFS, "data area larger than 128K: %d\n", *len); |
093b2bda PS |
386 | *len = 0; |
387 | } | |
388 | ||
389 | /* return pointer to beginning of data area, ie offset from SMB start */ | |
390 | if ((*off != 0) && (*len != 0)) | |
31473fc4 | 391 | return (char *)shdr + *off; |
093b2bda PS |
392 | else |
393 | return NULL; | |
394 | } | |
395 | ||
396 | /* | |
397 | * Calculate the size of the SMB message based on the fixed header | |
398 | * portion, the number of word parameters and the data portion of the message. | |
399 | */ | |
400 | unsigned int | |
9ec672bd | 401 | smb2_calc_size(void *buf, struct TCP_Server_Info *srvr) |
093b2bda | 402 | { |
0d35e382 RS |
403 | struct smb2_pdu *pdu = (struct smb2_pdu *)buf; |
404 | struct smb2_hdr *shdr = &pdu->hdr; | |
093b2bda PS |
405 | int offset; /* the offset from the beginning of SMB to data area */ |
406 | int data_length; /* the length of the variable length data area */ | |
407 | /* Structure Size has already been checked to make sure it is 64 */ | |
1fc6ad2f | 408 | int len = le16_to_cpu(shdr->StructureSize); |
093b2bda PS |
409 | |
410 | /* | |
411 | * StructureSize2, ie length of fixed parameter area has already | |
412 | * been checked to make sure it is the correct length. | |
413 | */ | |
414 | len += le16_to_cpu(pdu->StructureSize2); | |
415 | ||
31473fc4 | 416 | if (has_smb2_data_area[le16_to_cpu(shdr->Command)] == false) |
093b2bda PS |
417 | goto calc_size_exit; |
418 | ||
e4dc31fe | 419 | smb2_get_data_area_len(&offset, &data_length, shdr); |
f96637be | 420 | cifs_dbg(FYI, "SMB2 data length %d offset %d\n", data_length, offset); |
093b2bda PS |
421 | |
422 | if (data_length > 0) { | |
423 | /* | |
424 | * Check to make sure that data area begins after fixed area, | |
425 | * Note that last byte of the fixed area is part of data area | |
426 | * for some commands, typically those with odd StructureSize, | |
84f0cbfb | 427 | * so we must add one to the calculation. |
093b2bda | 428 | */ |
1fc6ad2f RS |
429 | if (offset + 1 < len) { |
430 | cifs_dbg(VFS, "data area offset %d overlaps SMB2 header %d\n", | |
431 | offset + 1, len); | |
093b2bda PS |
432 | data_length = 0; |
433 | } else { | |
1fc6ad2f | 434 | len = offset + data_length; |
093b2bda PS |
435 | } |
436 | } | |
437 | calc_size_exit: | |
f96637be | 438 | cifs_dbg(FYI, "SMB2 len %d\n", len); |
093b2bda PS |
439 | return len; |
440 | } | |
2503a0db PS |
441 | |
442 | /* Note: caller must free return buffer */ | |
443 | __le16 * | |
444 | cifs_convert_path_to_utf16(const char *from, struct cifs_sb_info *cifs_sb) | |
445 | { | |
446 | int len; | |
447 | const char *start_of_path; | |
448 | __le16 *to; | |
a4153cb1 SF |
449 | int map_type; |
450 | ||
451 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SFM_CHR) | |
452 | map_type = SFM_MAP_UNI_RSVD; | |
453 | else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR) | |
454 | map_type = SFU_MAP_UNI_RSVD; | |
455 | else | |
456 | map_type = NO_MAP_UNI_RSVD; | |
2503a0db PS |
457 | |
458 | /* Windows doesn't allow paths beginning with \ */ | |
459 | if (from[0] == '\\') | |
460 | start_of_path = from + 1; | |
0fdfef9a | 461 | |
ce558b0e | 462 | /* SMB311 POSIX extensions paths do not include leading slash */ |
8ddecf5f | 463 | else if (cifs_sb_master_tlink(cifs_sb) && |
d819d298 SF |
464 | cifs_sb_master_tcon(cifs_sb)->posix_extensions && |
465 | (from[0] == '/')) { | |
ce558b0e | 466 | start_of_path = from + 1; |
0fdfef9a | 467 | } else |
2503a0db | 468 | start_of_path = from; |
ce558b0e | 469 | |
2503a0db | 470 | to = cifs_strndup_to_utf16(start_of_path, PATH_MAX, &len, |
a4153cb1 | 471 | cifs_sb->local_nls, map_type); |
2503a0db PS |
472 | return to; |
473 | } | |
983c88a4 | 474 | |
0822f514 PS |
475 | __le32 |
476 | smb2_get_lease_state(struct cifsInodeInfo *cinode) | |
477 | { | |
53ef1016 | 478 | __le32 lease = 0; |
0822f514 | 479 | |
53ef1016 PS |
480 | if (CIFS_CACHE_WRITE(cinode)) |
481 | lease |= SMB2_LEASE_WRITE_CACHING; | |
482 | if (CIFS_CACHE_HANDLE(cinode)) | |
483 | lease |= SMB2_LEASE_HANDLE_CACHING; | |
484 | if (CIFS_CACHE_READ(cinode)) | |
485 | lease |= SMB2_LEASE_READ_CACHING; | |
486 | return lease; | |
0822f514 PS |
487 | } |
488 | ||
233839b1 PS |
489 | struct smb2_lease_break_work { |
490 | struct work_struct lease_break; | |
491 | struct tcon_link *tlink; | |
492 | __u8 lease_key[16]; | |
493 | __le32 lease_state; | |
494 | }; | |
495 | ||
496 | static void | |
497 | cifs_ses_oplock_break(struct work_struct *work) | |
498 | { | |
499 | struct smb2_lease_break_work *lw = container_of(work, | |
500 | struct smb2_lease_break_work, lease_break); | |
a93864d9 | 501 | int rc = 0; |
233839b1 PS |
502 | |
503 | rc = SMB2_lease_break(0, tlink_tcon(lw->tlink), lw->lease_key, | |
504 | lw->lease_state); | |
a93864d9 | 505 | |
f96637be | 506 | cifs_dbg(FYI, "Lease release rc %d\n", rc); |
233839b1 PS |
507 | cifs_put_tlink(lw->tlink); |
508 | kfree(lw); | |
509 | } | |
510 | ||
baf57b56 PA |
511 | static void |
512 | smb2_queue_pending_open_break(struct tcon_link *tlink, __u8 *lease_key, | |
513 | __le32 new_lease_state) | |
514 | { | |
515 | struct smb2_lease_break_work *lw; | |
516 | ||
517 | lw = kmalloc(sizeof(struct smb2_lease_break_work), GFP_KERNEL); | |
518 | if (!lw) { | |
519 | cifs_put_tlink(tlink); | |
520 | return; | |
521 | } | |
522 | ||
523 | INIT_WORK(&lw->lease_break, cifs_ses_oplock_break); | |
524 | lw->tlink = tlink; | |
525 | lw->lease_state = new_lease_state; | |
526 | memcpy(lw->lease_key, lease_key, SMB2_LEASE_KEY_SIZE); | |
527 | queue_work(cifsiod_wq, &lw->lease_break); | |
528 | } | |
529 | ||
0822f514 | 530 | static bool |
baf57b56 | 531 | smb2_tcon_has_lease(struct cifs_tcon *tcon, struct smb2_lease_break *rsp) |
933d4b36 | 532 | { |
933d4b36 | 533 | __u8 lease_state; |
933d4b36 | 534 | struct cifsFileInfo *cfile; |
933d4b36 PS |
535 | struct cifsInodeInfo *cinode; |
536 | int ack_req = le32_to_cpu(rsp->Flags & | |
537 | SMB2_NOTIFY_BREAK_LEASE_FLAG_ACK_REQUIRED); | |
538 | ||
53ef1016 | 539 | lease_state = le32_to_cpu(rsp->NewLeaseState); |
933d4b36 | 540 | |
647f5927 | 541 | list_for_each_entry(cfile, &tcon->openFileList, tlist) { |
2b0143b5 | 542 | cinode = CIFS_I(d_inode(cfile->dentry)); |
933d4b36 PS |
543 | |
544 | if (memcmp(cinode->lease_key, rsp->LeaseKey, | |
545 | SMB2_LEASE_KEY_SIZE)) | |
546 | continue; | |
547 | ||
548 | cifs_dbg(FYI, "found in the open list\n"); | |
59b04c5d | 549 | cifs_dbg(FYI, "lease key match, lease break 0x%x\n", |
9bd45408 | 550 | lease_state); |
933d4b36 | 551 | |
933d4b36 PS |
552 | if (ack_req) |
553 | cfile->oplock_break_cancelled = false; | |
554 | else | |
555 | cfile->oplock_break_cancelled = true; | |
556 | ||
7b9b9edb PS |
557 | set_bit(CIFS_INODE_PENDING_OPLOCK_BREAK, &cinode->flags); |
558 | ||
9bd45408 PS |
559 | cfile->oplock_epoch = le16_to_cpu(rsp->Epoch); |
560 | cfile->oplock_level = lease_state; | |
7b9b9edb | 561 | |
b98749ca | 562 | cifs_queue_oplock_break(cfile); |
933d4b36 PS |
563 | return true; |
564 | } | |
565 | ||
baf57b56 PA |
566 | return false; |
567 | } | |
568 | ||
569 | static struct cifs_pending_open * | |
570 | smb2_tcon_find_pending_open_lease(struct cifs_tcon *tcon, | |
571 | struct smb2_lease_break *rsp) | |
572 | { | |
573 | __u8 lease_state = le32_to_cpu(rsp->NewLeaseState); | |
574 | int ack_req = le32_to_cpu(rsp->Flags & | |
575 | SMB2_NOTIFY_BREAK_LEASE_FLAG_ACK_REQUIRED); | |
576 | struct cifs_pending_open *open; | |
577 | struct cifs_pending_open *found = NULL; | |
578 | ||
933d4b36 PS |
579 | list_for_each_entry(open, &tcon->pending_opens, olist) { |
580 | if (memcmp(open->lease_key, rsp->LeaseKey, | |
581 | SMB2_LEASE_KEY_SIZE)) | |
582 | continue; | |
583 | ||
584 | if (!found && ack_req) { | |
baf57b56 | 585 | found = open; |
933d4b36 PS |
586 | } |
587 | ||
588 | cifs_dbg(FYI, "found in the pending open list\n"); | |
59b04c5d | 589 | cifs_dbg(FYI, "lease key match, lease break 0x%x\n", |
9bd45408 | 590 | lease_state); |
933d4b36 PS |
591 | |
592 | open->oplock = lease_state; | |
593 | } | |
a93864d9 | 594 | |
933d4b36 PS |
595 | return found; |
596 | } | |
597 | ||
598 | static bool | |
599 | smb2_is_valid_lease_break(char *buffer) | |
0822f514 PS |
600 | { |
601 | struct smb2_lease_break *rsp = (struct smb2_lease_break *)buffer; | |
933d4b36 | 602 | struct TCP_Server_Info *server; |
0822f514 PS |
603 | struct cifs_ses *ses; |
604 | struct cifs_tcon *tcon; | |
baf57b56 | 605 | struct cifs_pending_open *open; |
0822f514 | 606 | |
f96637be | 607 | cifs_dbg(FYI, "Checking for lease break\n"); |
0822f514 PS |
608 | |
609 | /* look up tcon based on tid & uid */ | |
610 | spin_lock(&cifs_tcp_ses_lock); | |
647f5927 BL |
611 | list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) { |
612 | list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) { | |
613 | list_for_each_entry(tcon, &ses->tcon_list, tcon_list) { | |
3afca265 | 614 | spin_lock(&tcon->open_file_lock); |
933d4b36 PS |
615 | cifs_stats_inc( |
616 | &tcon->stats.cifs_stats.num_oplock_brks); | |
baf57b56 | 617 | if (smb2_tcon_has_lease(tcon, rsp)) { |
3afca265 | 618 | spin_unlock(&tcon->open_file_lock); |
933d4b36 PS |
619 | spin_unlock(&cifs_tcp_ses_lock); |
620 | return true; | |
233839b1 | 621 | } |
baf57b56 PA |
622 | open = smb2_tcon_find_pending_open_lease(tcon, |
623 | rsp); | |
624 | if (open) { | |
625 | __u8 lease_key[SMB2_LEASE_KEY_SIZE]; | |
626 | struct tcon_link *tlink; | |
627 | ||
628 | tlink = cifs_get_tlink(open->tlink); | |
629 | memcpy(lease_key, open->lease_key, | |
630 | SMB2_LEASE_KEY_SIZE); | |
631 | spin_unlock(&tcon->open_file_lock); | |
632 | spin_unlock(&cifs_tcp_ses_lock); | |
633 | smb2_queue_pending_open_break(tlink, | |
634 | lease_key, | |
635 | rsp->NewLeaseState); | |
636 | return true; | |
637 | } | |
3afca265 | 638 | spin_unlock(&tcon->open_file_lock); |
a93864d9 RS |
639 | |
640 | if (tcon->crfid.is_valid && | |
641 | !memcmp(rsp->LeaseKey, | |
642 | tcon->crfid.fid->lease_key, | |
643 | SMB2_LEASE_KEY_SIZE)) { | |
ed20f54a | 644 | tcon->crfid.time = 0; |
a93864d9 RS |
645 | INIT_WORK(&tcon->crfid.lease_break, |
646 | smb2_cached_lease_break); | |
647 | queue_work(cifsiod_wq, | |
648 | &tcon->crfid.lease_break); | |
649 | spin_unlock(&cifs_tcp_ses_lock); | |
650 | return true; | |
651 | } | |
233839b1 | 652 | } |
0822f514 PS |
653 | } |
654 | } | |
655 | spin_unlock(&cifs_tcp_ses_lock); | |
f96637be | 656 | cifs_dbg(FYI, "Can not process lease break - no lease matched\n"); |
0822f514 PS |
657 | return false; |
658 | } | |
659 | ||
983c88a4 PS |
660 | bool |
661 | smb2_is_valid_oplock_break(char *buffer, struct TCP_Server_Info *server) | |
662 | { | |
0d5a288d | 663 | struct smb2_oplock_break *rsp = (struct smb2_oplock_break *)buffer; |
983c88a4 PS |
664 | struct cifs_ses *ses; |
665 | struct cifs_tcon *tcon; | |
666 | struct cifsInodeInfo *cinode; | |
667 | struct cifsFileInfo *cfile; | |
668 | ||
f96637be | 669 | cifs_dbg(FYI, "Checking for oplock break\n"); |
983c88a4 | 670 | |
0d35e382 | 671 | if (rsp->hdr.Command != SMB2_OPLOCK_BREAK) |
983c88a4 PS |
672 | return false; |
673 | ||
12e8a208 | 674 | if (rsp->StructureSize != |
983c88a4 | 675 | smb2_rsp_struct_sizes[SMB2_OPLOCK_BREAK_HE]) { |
0822f514 | 676 | if (le16_to_cpu(rsp->StructureSize) == 44) |
933d4b36 | 677 | return smb2_is_valid_lease_break(buffer); |
0822f514 PS |
678 | else |
679 | return false; | |
983c88a4 PS |
680 | } |
681 | ||
59b04c5d | 682 | cifs_dbg(FYI, "oplock level 0x%x\n", rsp->OplockLevel); |
983c88a4 PS |
683 | |
684 | /* look up tcon based on tid & uid */ | |
685 | spin_lock(&cifs_tcp_ses_lock); | |
647f5927 BL |
686 | list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) { |
687 | list_for_each_entry(tcon, &ses->tcon_list, tcon_list) { | |
983c88a4 | 688 | |
3afca265 | 689 | spin_lock(&tcon->open_file_lock); |
647f5927 | 690 | list_for_each_entry(cfile, &tcon->openFileList, tlist) { |
983c88a4 PS |
691 | if (rsp->PersistentFid != |
692 | cfile->fid.persistent_fid || | |
693 | rsp->VolatileFid != | |
694 | cfile->fid.volatile_fid) | |
695 | continue; | |
696 | ||
f96637be | 697 | cifs_dbg(FYI, "file id match, oplock break\n"); |
fa9c2362 PS |
698 | cifs_stats_inc( |
699 | &tcon->stats.cifs_stats.num_oplock_brks); | |
2b0143b5 | 700 | cinode = CIFS_I(d_inode(cfile->dentry)); |
3afca265 | 701 | spin_lock(&cfile->file_info_lock); |
18cceb6a | 702 | if (!CIFS_CACHE_WRITE(cinode) && |
983c88a4 PS |
703 | rsp->OplockLevel == SMB2_OPLOCK_LEVEL_NONE) |
704 | cfile->oplock_break_cancelled = true; | |
705 | else | |
706 | cfile->oplock_break_cancelled = false; | |
707 | ||
c11f1df5 SP |
708 | set_bit(CIFS_INODE_PENDING_OPLOCK_BREAK, |
709 | &cinode->flags); | |
710 | ||
9bd45408 PS |
711 | cfile->oplock_epoch = 0; |
712 | cfile->oplock_level = rsp->OplockLevel; | |
713 | ||
3afca265 | 714 | spin_unlock(&cfile->file_info_lock); |
b98749ca AA |
715 | |
716 | cifs_queue_oplock_break(cfile); | |
983c88a4 | 717 | |
3afca265 | 718 | spin_unlock(&tcon->open_file_lock); |
983c88a4 PS |
719 | spin_unlock(&cifs_tcp_ses_lock); |
720 | return true; | |
721 | } | |
3afca265 | 722 | spin_unlock(&tcon->open_file_lock); |
983c88a4 PS |
723 | } |
724 | } | |
725 | spin_unlock(&cifs_tcp_ses_lock); | |
219481a8 VW |
726 | cifs_dbg(FYI, "No file id matched, oplock break ignored\n"); |
727 | return true; | |
983c88a4 | 728 | } |
38bd4906 SP |
729 | |
730 | void | |
731 | smb2_cancelled_close_fid(struct work_struct *work) | |
732 | { | |
733 | struct close_cancelled_open *cancelled = container_of(work, | |
734 | struct close_cancelled_open, work); | |
87bc2376 RS |
735 | struct cifs_tcon *tcon = cancelled->tcon; |
736 | int rc; | |
737 | ||
738 | if (cancelled->mid) | |
bf1bc694 | 739 | cifs_tcon_dbg(VFS, "Close unmatched open for MID:%llu\n", |
87bc2376 RS |
740 | cancelled->mid); |
741 | else | |
742 | cifs_tcon_dbg(VFS, "Close interrupted close\n"); | |
38bd4906 | 743 | |
87bc2376 RS |
744 | rc = SMB2_close(0, tcon, cancelled->fid.persistent_fid, |
745 | cancelled->fid.volatile_fid); | |
746 | if (rc) | |
747 | cifs_tcon_dbg(VFS, "Close cancelled mid failed rc:%d\n", rc); | |
38bd4906 | 748 | |
87bc2376 | 749 | cifs_put_tcon(tcon); |
38bd4906 SP |
750 | kfree(cancelled); |
751 | } | |
752 | ||
87bc2376 RS |
753 | /* |
754 | * Caller should already has an extra reference to @tcon | |
755 | * This function is used to queue work to close a handle to prevent leaks | |
756 | * on the server. | |
757 | * We handle two cases. If an open was interrupted after we sent the | |
758 | * SMB2_CREATE to the server but before we processed the reply, and second | |
759 | * if a close was interrupted before we sent the SMB2_CLOSE to the server. | |
760 | */ | |
9150c3ad | 761 | static int |
87bc2376 RS |
762 | __smb2_handle_cancelled_cmd(struct cifs_tcon *tcon, __u16 cmd, __u64 mid, |
763 | __u64 persistent_fid, __u64 volatile_fid) | |
9150c3ad PS |
764 | { |
765 | struct close_cancelled_open *cancelled; | |
766 | ||
0a5a9886 | 767 | cancelled = kzalloc(sizeof(*cancelled), GFP_ATOMIC); |
9150c3ad PS |
768 | if (!cancelled) |
769 | return -ENOMEM; | |
770 | ||
771 | cancelled->fid.persistent_fid = persistent_fid; | |
772 | cancelled->fid.volatile_fid = volatile_fid; | |
773 | cancelled->tcon = tcon; | |
87bc2376 RS |
774 | cancelled->cmd = cmd; |
775 | cancelled->mid = mid; | |
9150c3ad PS |
776 | INIT_WORK(&cancelled->work, smb2_cancelled_close_fid); |
777 | WARN_ON(queue_work(cifsiod_wq, &cancelled->work) == false); | |
778 | ||
779 | return 0; | |
780 | } | |
781 | ||
782 | int | |
783 | smb2_handle_cancelled_close(struct cifs_tcon *tcon, __u64 persistent_fid, | |
784 | __u64 volatile_fid) | |
785 | { | |
786 | int rc; | |
787 | ||
788 | cifs_dbg(FYI, "%s: tc_count=%d\n", __func__, tcon->tc_count); | |
789 | spin_lock(&cifs_tcp_ses_lock); | |
e79b0332 AA |
790 | if (tcon->tc_count <= 0) { |
791 | struct TCP_Server_Info *server = NULL; | |
792 | ||
793 | WARN_ONCE(tcon->tc_count < 0, "tcon refcount is negative"); | |
794 | spin_unlock(&cifs_tcp_ses_lock); | |
795 | ||
796 | if (tcon->ses) | |
797 | server = tcon->ses->server; | |
798 | ||
799 | cifs_server_dbg(FYI, "tid=%u: tcon is closing, skipping async close retry of fid %llu %llu\n", | |
800 | tcon->tid, persistent_fid, volatile_fid); | |
801 | ||
802 | return 0; | |
803 | } | |
9150c3ad PS |
804 | tcon->tc_count++; |
805 | spin_unlock(&cifs_tcp_ses_lock); | |
806 | ||
87bc2376 RS |
807 | rc = __smb2_handle_cancelled_cmd(tcon, SMB2_CLOSE_HE, 0, |
808 | persistent_fid, volatile_fid); | |
9150c3ad PS |
809 | if (rc) |
810 | cifs_put_tcon(tcon); | |
811 | ||
812 | return rc; | |
813 | } | |
814 | ||
38bd4906 | 815 | int |
04ad69c3 | 816 | smb2_handle_cancelled_mid(struct mid_q_entry *mid, struct TCP_Server_Info *server) |
38bd4906 | 817 | { |
0d35e382 | 818 | struct smb2_hdr *hdr = mid->resp_buf; |
04ad69c3 | 819 | struct smb2_create_rsp *rsp = mid->resp_buf; |
38bd4906 | 820 | struct cifs_tcon *tcon; |
9150c3ad | 821 | int rc; |
38bd4906 | 822 | |
0d35e382 RS |
823 | if ((mid->optype & CIFS_CP_CREATE_CLOSE_OP) || hdr->Command != SMB2_CREATE || |
824 | hdr->Status != STATUS_SUCCESS) | |
38bd4906 SP |
825 | return 0; |
826 | ||
0d35e382 RS |
827 | tcon = smb2_find_smb_tcon(server, le64_to_cpu(hdr->SessionId), |
828 | le32_to_cpu(hdr->Id.SyncId.TreeId)); | |
9150c3ad | 829 | if (!tcon) |
38bd4906 | 830 | return -ENOENT; |
38bd4906 | 831 | |
87bc2376 | 832 | rc = __smb2_handle_cancelled_cmd(tcon, |
0d35e382 RS |
833 | le16_to_cpu(hdr->Command), |
834 | le64_to_cpu(hdr->MessageId), | |
c462870b RS |
835 | le64_to_cpu(rsp->PersistentFileId), |
836 | le64_to_cpu(rsp->VolatileFileId)); | |
9150c3ad PS |
837 | if (rc) |
838 | cifs_put_tcon(tcon); | |
38bd4906 | 839 | |
9150c3ad | 840 | return rc; |
38bd4906 | 841 | } |
8bd68c6e | 842 | |
8bd68c6e AA |
843 | /** |
844 | * smb311_update_preauth_hash - update @ses hash with the packet data in @iov | |
845 | * | |
846 | * Assumes @iov does not contain the rfc1002 length and iov[0] has the | |
847 | * SMB2 header. | |
607dfc79 SF |
848 | * |
849 | * @ses: server session structure | |
3ac5f2f2 | 850 | * @server: pointer to server info |
607dfc79 SF |
851 | * @iov: array containing the SMB request we will send to the server |
852 | * @nvec: number of array entries for the iov | |
8bd68c6e AA |
853 | */ |
854 | int | |
f486ef8e SP |
855 | smb311_update_preauth_hash(struct cifs_ses *ses, struct TCP_Server_Info *server, |
856 | struct kvec *iov, int nvec) | |
8bd68c6e AA |
857 | { |
858 | int i, rc; | |
859 | struct sdesc *d; | |
0d35e382 | 860 | struct smb2_hdr *hdr; |
8bd68c6e | 861 | |
0d35e382 | 862 | hdr = (struct smb2_hdr *)iov[0].iov_base; |
d70e9fa5 AA |
863 | /* neg prot are always taken */ |
864 | if (hdr->Command == SMB2_NEGOTIATE) | |
865 | goto ok; | |
8bd68c6e | 866 | |
d70e9fa5 AA |
867 | /* |
868 | * If we process a command which wasn't a negprot it means the | |
869 | * neg prot was already done, so the server dialect was set | |
870 | * and we can test it. Preauth requires 3.1.1 for now. | |
871 | */ | |
872 | if (server->dialect != SMB311_PROT_ID) | |
873 | return 0; | |
874 | ||
875 | if (hdr->Command != SMB2_SESSION_SETUP) | |
876 | return 0; | |
877 | ||
878 | /* skip last sess setup response */ | |
879 | if ((hdr->Flags & SMB2_FLAGS_SERVER_TO_REDIR) | |
880 | && (hdr->Status == NT_STATUS_OK | |
881 | || (hdr->Status != | |
882 | cpu_to_le32(NT_STATUS_MORE_PROCESSING_REQUIRED)))) | |
883 | return 0; | |
8bd68c6e | 884 | |
d70e9fa5 AA |
885 | ok: |
886 | rc = smb311_crypto_shash_allocate(server); | |
8bd68c6e AA |
887 | if (rc) |
888 | return rc; | |
889 | ||
d70e9fa5 | 890 | d = server->secmech.sdescsha512; |
8bd68c6e AA |
891 | rc = crypto_shash_init(&d->shash); |
892 | if (rc) { | |
a0a3036b | 893 | cifs_dbg(VFS, "%s: Could not init sha512 shash\n", __func__); |
8bd68c6e AA |
894 | return rc; |
895 | } | |
896 | ||
897 | rc = crypto_shash_update(&d->shash, ses->preauth_sha_hash, | |
898 | SMB2_PREAUTH_HASH_SIZE); | |
899 | if (rc) { | |
a0a3036b | 900 | cifs_dbg(VFS, "%s: Could not update sha512 shash\n", __func__); |
8bd68c6e AA |
901 | return rc; |
902 | } | |
903 | ||
904 | for (i = 0; i < nvec; i++) { | |
905 | rc = crypto_shash_update(&d->shash, | |
906 | iov[i].iov_base, iov[i].iov_len); | |
907 | if (rc) { | |
a0a3036b | 908 | cifs_dbg(VFS, "%s: Could not update sha512 shash\n", |
8bd68c6e AA |
909 | __func__); |
910 | return rc; | |
911 | } | |
912 | } | |
913 | ||
914 | rc = crypto_shash_final(&d->shash, ses->preauth_sha_hash); | |
915 | if (rc) { | |
a0a3036b | 916 | cifs_dbg(VFS, "%s: Could not finalize sha512 shash\n", |
8bd68c6e AA |
917 | __func__); |
918 | return rc; | |
919 | } | |
920 | ||
921 | return 0; | |
922 | } |