1 // SPDX-License-Identifier: LGPL-2.1
4 * Copyright (C) International Business Machines Corp., 2002, 2011
6 * Author(s): Steve French (sfrench@us.ibm.com)
7 * Jeremy Allison (jra@samba.org) 2006
8 * Pavel Shilovsky (pshilovsky@samba.org) 2012
13 #include <linux/list.h>
14 #include <linux/wait.h>
15 #include <linux/net.h>
16 #include <linux/delay.h>
17 #include <linux/uaccess.h>
18 #include <asm/processor.h>
19 #include <linux/mempool.h>
20 #include <linux/highmem.h>
21 #include <crypto/aead.h>
23 #include "cifsproto.h"
24 #include "smb2proto.h"
25 #include "cifs_debug.h"
26 #include "smb2status.h"
30 smb3_crypto_shash_allocate(struct TCP_Server_Info *server)
32 struct cifs_secmech *p = &server->secmech;
35 rc = cifs_alloc_hash("hmac(sha256)", &p->hmacsha256);
39 rc = cifs_alloc_hash("cmac(aes)", &p->aes_cmac);
45 cifs_free_hash(&p->hmacsha256);
50 smb311_crypto_shash_allocate(struct TCP_Server_Info *server)
52 struct cifs_secmech *p = &server->secmech;
55 rc = cifs_alloc_hash("hmac(sha256)", &p->hmacsha256);
59 rc = cifs_alloc_hash("cmac(aes)", &p->aes_cmac);
63 rc = cifs_alloc_hash("sha512", &p->sha512);
70 cifs_free_hash(&p->aes_cmac);
71 cifs_free_hash(&p->hmacsha256);
77 int smb2_get_sign_key(__u64 ses_id, struct TCP_Server_Info *server, u8 *key)
79 struct cifs_chan *chan;
80 struct TCP_Server_Info *pserver;
81 struct cifs_ses *ses = NULL;
84 bool is_binding = false;
86 spin_lock(&cifs_tcp_ses_lock);
88 /* If server is a channel, select the primary channel */
89 pserver = SERVER_IS_CHAN(server) ? server->primary_server : server;
91 list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) {
92 if (ses->Suid == ses_id)
95 trace_smb3_ses_not_found(ses_id);
96 cifs_server_dbg(FYI, "%s: Could not find session 0x%llx\n",
102 spin_lock(&ses->ses_lock);
103 spin_lock(&ses->chan_lock);
105 is_binding = (cifs_chan_needs_reconnect(ses, server) &&
106 ses->ses_status == SES_GOOD);
109 * If we are in the process of binding a new channel
110 * to an existing session, use the master connection
113 memcpy(key, ses->smb3signingkey, SMB3_SIGN_KEY_SIZE);
114 spin_unlock(&ses->chan_lock);
115 spin_unlock(&ses->ses_lock);
120 * Otherwise, use the channel key.
123 for (i = 0; i < ses->chan_count; i++) {
124 chan = ses->chans + i;
125 if (chan->server == server) {
126 memcpy(key, chan->signkey, SMB3_SIGN_KEY_SIZE);
127 spin_unlock(&ses->chan_lock);
128 spin_unlock(&ses->ses_lock);
132 spin_unlock(&ses->chan_lock);
133 spin_unlock(&ses->ses_lock);
136 "%s: Could not find channel signing key for session 0x%llx\n",
141 spin_unlock(&cifs_tcp_ses_lock);
145 static struct cifs_ses *
146 smb2_find_smb_ses_unlocked(struct TCP_Server_Info *server, __u64 ses_id)
148 struct TCP_Server_Info *pserver;
149 struct cifs_ses *ses;
151 /* If server is a channel, select the primary channel */
152 pserver = SERVER_IS_CHAN(server) ? server->primary_server : server;
154 list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) {
155 if (ses->Suid != ses_id)
158 spin_lock(&ses->ses_lock);
159 if (ses->ses_status == SES_EXITING) {
160 spin_unlock(&ses->ses_lock);
163 cifs_smb_ses_inc_refcount(ses);
164 spin_unlock(&ses->ses_lock);
172 smb2_find_smb_ses(struct TCP_Server_Info *server, __u64 ses_id)
174 struct cifs_ses *ses;
176 spin_lock(&cifs_tcp_ses_lock);
177 ses = smb2_find_smb_ses_unlocked(server, ses_id);
178 spin_unlock(&cifs_tcp_ses_lock);
183 static struct cifs_tcon *
184 smb2_find_smb_sess_tcon_unlocked(struct cifs_ses *ses, __u32 tid)
186 struct cifs_tcon *tcon;
188 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
189 if (tcon->tid != tid)
199 * Obtain tcon corresponding to the tid in the given
204 smb2_find_smb_tcon(struct TCP_Server_Info *server, __u64 ses_id, __u32 tid)
206 struct cifs_ses *ses;
207 struct cifs_tcon *tcon;
209 spin_lock(&cifs_tcp_ses_lock);
210 ses = smb2_find_smb_ses_unlocked(server, ses_id);
212 spin_unlock(&cifs_tcp_ses_lock);
215 tcon = smb2_find_smb_sess_tcon_unlocked(ses, tid);
217 cifs_put_smb_ses(ses);
218 spin_unlock(&cifs_tcp_ses_lock);
221 spin_unlock(&cifs_tcp_ses_lock);
222 /* tcon already has a ref to ses, so we don't need ses anymore */
223 cifs_put_smb_ses(ses);
229 smb2_calc_signature(struct smb_rqst *rqst, struct TCP_Server_Info *server,
230 bool allocate_crypto)
233 unsigned char smb2_signature[SMB2_HMACSHA256_SIZE];
234 unsigned char *sigptr = smb2_signature;
235 struct kvec *iov = rqst->rq_iov;
236 struct smb2_hdr *shdr = (struct smb2_hdr *)iov[0].iov_base;
237 struct cifs_ses *ses;
238 struct shash_desc *shash = NULL;
239 struct smb_rqst drqst;
241 ses = smb2_find_smb_ses(server, le64_to_cpu(shdr->SessionId));
242 if (unlikely(!ses)) {
243 cifs_server_dbg(VFS, "%s: Could not find session\n", __func__);
247 memset(smb2_signature, 0x0, SMB2_HMACSHA256_SIZE);
248 memset(shdr->Signature, 0x0, SMB2_SIGNATURE_SIZE);
250 if (allocate_crypto) {
251 rc = cifs_alloc_hash("hmac(sha256)", &shash);
254 "%s: sha256 alloc failed\n", __func__);
258 shash = server->secmech.hmacsha256;
261 rc = crypto_shash_setkey(shash->tfm, ses->auth_key.response,
262 SMB2_NTLMV2_SESSKEY_SIZE);
265 "%s: Could not update with response\n",
270 rc = crypto_shash_init(shash);
272 cifs_server_dbg(VFS, "%s: Could not init sha256", __func__);
277 * For SMB2+, __cifs_calc_signature() expects to sign only the actual
278 * data, that is, iov[0] should not contain a rfc1002 length.
280 * Sign the rfc1002 length prior to passing the data (iov[1-N]) down to
281 * __cifs_calc_signature().
284 if (drqst.rq_nvec >= 2 && iov[0].iov_len == 4) {
285 rc = crypto_shash_update(shash, iov[0].iov_base,
289 "%s: Could not update with payload\n",
297 rc = __cifs_calc_signature(&drqst, server, sigptr, shash);
299 memcpy(shdr->Signature, sigptr, SMB2_SIGNATURE_SIZE);
303 cifs_free_hash(&shash);
305 cifs_put_smb_ses(ses);
309 static int generate_key(struct cifs_ses *ses, struct kvec label,
310 struct kvec context, __u8 *key, unsigned int key_size)
312 unsigned char zero = 0x0;
313 __u8 i[4] = {0, 0, 0, 1};
314 __u8 L128[4] = {0, 0, 0, 128};
315 __u8 L256[4] = {0, 0, 1, 0};
317 unsigned char prfhash[SMB2_HMACSHA256_SIZE];
318 unsigned char *hashptr = prfhash;
319 struct TCP_Server_Info *server = ses->server;
321 memset(prfhash, 0x0, SMB2_HMACSHA256_SIZE);
322 memset(key, 0x0, key_size);
324 rc = smb3_crypto_shash_allocate(server);
326 cifs_server_dbg(VFS, "%s: crypto alloc failed\n", __func__);
327 goto smb3signkey_ret;
330 rc = crypto_shash_setkey(server->secmech.hmacsha256->tfm,
331 ses->auth_key.response, SMB2_NTLMV2_SESSKEY_SIZE);
333 cifs_server_dbg(VFS, "%s: Could not set with session key\n", __func__);
334 goto smb3signkey_ret;
337 rc = crypto_shash_init(server->secmech.hmacsha256);
339 cifs_server_dbg(VFS, "%s: Could not init sign hmac\n", __func__);
340 goto smb3signkey_ret;
343 rc = crypto_shash_update(server->secmech.hmacsha256, i, 4);
345 cifs_server_dbg(VFS, "%s: Could not update with n\n", __func__);
346 goto smb3signkey_ret;
349 rc = crypto_shash_update(server->secmech.hmacsha256, label.iov_base, label.iov_len);
351 cifs_server_dbg(VFS, "%s: Could not update with label\n", __func__);
352 goto smb3signkey_ret;
355 rc = crypto_shash_update(server->secmech.hmacsha256, &zero, 1);
357 cifs_server_dbg(VFS, "%s: Could not update with zero\n", __func__);
358 goto smb3signkey_ret;
361 rc = crypto_shash_update(server->secmech.hmacsha256, context.iov_base, context.iov_len);
363 cifs_server_dbg(VFS, "%s: Could not update with context\n", __func__);
364 goto smb3signkey_ret;
367 if ((server->cipher_type == SMB2_ENCRYPTION_AES256_CCM) ||
368 (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM)) {
369 rc = crypto_shash_update(server->secmech.hmacsha256, L256, 4);
371 rc = crypto_shash_update(server->secmech.hmacsha256, L128, 4);
374 cifs_server_dbg(VFS, "%s: Could not update with L\n", __func__);
375 goto smb3signkey_ret;
378 rc = crypto_shash_final(server->secmech.hmacsha256, hashptr);
380 cifs_server_dbg(VFS, "%s: Could not generate sha256 hash\n", __func__);
381 goto smb3signkey_ret;
384 memcpy(key, hashptr, key_size);
395 struct derivation_triplet {
396 struct derivation signing;
397 struct derivation encryption;
398 struct derivation decryption;
402 generate_smb3signingkey(struct cifs_ses *ses,
403 struct TCP_Server_Info *server,
404 const struct derivation_triplet *ptriplet)
407 bool is_binding = false;
410 spin_lock(&ses->ses_lock);
411 spin_lock(&ses->chan_lock);
412 is_binding = (cifs_chan_needs_reconnect(ses, server) &&
413 ses->ses_status == SES_GOOD);
415 chan_index = cifs_ses_get_chan_index(ses, server);
416 if (chan_index == CIFS_INVAL_CHAN_INDEX) {
417 spin_unlock(&ses->chan_lock);
418 spin_unlock(&ses->ses_lock);
423 spin_unlock(&ses->chan_lock);
424 spin_unlock(&ses->ses_lock);
427 * All channels use the same encryption/decryption keys but
428 * they have their own signing key.
430 * When we generate the keys, check if it is for a new channel
431 * (binding) in which case we only need to generate a signing
432 * key and store it in the channel as to not overwrite the
433 * master connection signing key stored in the session
437 rc = generate_key(ses, ptriplet->signing.label,
438 ptriplet->signing.context,
439 ses->chans[chan_index].signkey,
444 rc = generate_key(ses, ptriplet->signing.label,
445 ptriplet->signing.context,
451 /* safe to access primary channel, since it will never go away */
452 spin_lock(&ses->chan_lock);
453 memcpy(ses->chans[chan_index].signkey, ses->smb3signingkey,
455 spin_unlock(&ses->chan_lock);
457 rc = generate_key(ses, ptriplet->encryption.label,
458 ptriplet->encryption.context,
459 ses->smb3encryptionkey,
460 SMB3_ENC_DEC_KEY_SIZE);
461 rc = generate_key(ses, ptriplet->decryption.label,
462 ptriplet->decryption.context,
463 ses->smb3decryptionkey,
464 SMB3_ENC_DEC_KEY_SIZE);
472 #ifdef CONFIG_CIFS_DEBUG_DUMP_KEYS
473 cifs_dbg(VFS, "%s: dumping generated AES session keys\n", __func__);
475 * The session id is opaque in terms of endianness, so we can't
476 * print it as a long long. we dump it as we got it on the wire
478 cifs_dbg(VFS, "Session Id %*ph\n", (int)sizeof(ses->Suid),
480 cifs_dbg(VFS, "Cipher type %d\n", server->cipher_type);
481 cifs_dbg(VFS, "Session Key %*ph\n",
482 SMB2_NTLMV2_SESSKEY_SIZE, ses->auth_key.response);
483 cifs_dbg(VFS, "Signing Key %*ph\n",
484 SMB3_SIGN_KEY_SIZE, ses->smb3signingkey);
485 if ((server->cipher_type == SMB2_ENCRYPTION_AES256_CCM) ||
486 (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM)) {
487 cifs_dbg(VFS, "ServerIn Key %*ph\n",
488 SMB3_GCM256_CRYPTKEY_SIZE, ses->smb3encryptionkey);
489 cifs_dbg(VFS, "ServerOut Key %*ph\n",
490 SMB3_GCM256_CRYPTKEY_SIZE, ses->smb3decryptionkey);
492 cifs_dbg(VFS, "ServerIn Key %*ph\n",
493 SMB3_GCM128_CRYPTKEY_SIZE, ses->smb3encryptionkey);
494 cifs_dbg(VFS, "ServerOut Key %*ph\n",
495 SMB3_GCM128_CRYPTKEY_SIZE, ses->smb3decryptionkey);
502 generate_smb30signingkey(struct cifs_ses *ses,
503 struct TCP_Server_Info *server)
506 struct derivation_triplet triplet;
507 struct derivation *d;
509 d = &triplet.signing;
510 d->label.iov_base = "SMB2AESCMAC";
511 d->label.iov_len = 12;
512 d->context.iov_base = "SmbSign";
513 d->context.iov_len = 8;
515 d = &triplet.encryption;
516 d->label.iov_base = "SMB2AESCCM";
517 d->label.iov_len = 11;
518 d->context.iov_base = "ServerIn ";
519 d->context.iov_len = 10;
521 d = &triplet.decryption;
522 d->label.iov_base = "SMB2AESCCM";
523 d->label.iov_len = 11;
524 d->context.iov_base = "ServerOut";
525 d->context.iov_len = 10;
527 return generate_smb3signingkey(ses, server, &triplet);
531 generate_smb311signingkey(struct cifs_ses *ses,
532 struct TCP_Server_Info *server)
535 struct derivation_triplet triplet;
536 struct derivation *d;
538 d = &triplet.signing;
539 d->label.iov_base = "SMBSigningKey";
540 d->label.iov_len = 14;
541 d->context.iov_base = ses->preauth_sha_hash;
542 d->context.iov_len = 64;
544 d = &triplet.encryption;
545 d->label.iov_base = "SMBC2SCipherKey";
546 d->label.iov_len = 16;
547 d->context.iov_base = ses->preauth_sha_hash;
548 d->context.iov_len = 64;
550 d = &triplet.decryption;
551 d->label.iov_base = "SMBS2CCipherKey";
552 d->label.iov_len = 16;
553 d->context.iov_base = ses->preauth_sha_hash;
554 d->context.iov_len = 64;
556 return generate_smb3signingkey(ses, server, &triplet);
560 smb3_calc_signature(struct smb_rqst *rqst, struct TCP_Server_Info *server,
561 bool allocate_crypto)
564 unsigned char smb3_signature[SMB2_CMACAES_SIZE];
565 unsigned char *sigptr = smb3_signature;
566 struct kvec *iov = rqst->rq_iov;
567 struct smb2_hdr *shdr = (struct smb2_hdr *)iov[0].iov_base;
568 struct shash_desc *shash = NULL;
569 struct smb_rqst drqst;
570 u8 key[SMB3_SIGN_KEY_SIZE];
572 rc = smb2_get_sign_key(le64_to_cpu(shdr->SessionId), server, key);
574 cifs_server_dbg(FYI, "%s: Could not get signing key\n", __func__);
578 if (allocate_crypto) {
579 rc = cifs_alloc_hash("cmac(aes)", &shash);
583 shash = server->secmech.aes_cmac;
586 memset(smb3_signature, 0x0, SMB2_CMACAES_SIZE);
587 memset(shdr->Signature, 0x0, SMB2_SIGNATURE_SIZE);
589 rc = crypto_shash_setkey(shash->tfm, key, SMB2_CMACAES_SIZE);
591 cifs_server_dbg(VFS, "%s: Could not set key for cmac aes\n", __func__);
596 * we already allocate aes_cmac when we init smb3 signing key,
597 * so unlike smb2 case we do not have to check here if secmech are
600 rc = crypto_shash_init(shash);
602 cifs_server_dbg(VFS, "%s: Could not init cmac aes\n", __func__);
607 * For SMB2+, __cifs_calc_signature() expects to sign only the actual
608 * data, that is, iov[0] should not contain a rfc1002 length.
610 * Sign the rfc1002 length prior to passing the data (iov[1-N]) down to
611 * __cifs_calc_signature().
614 if (drqst.rq_nvec >= 2 && iov[0].iov_len == 4) {
615 rc = crypto_shash_update(shash, iov[0].iov_base,
618 cifs_server_dbg(VFS, "%s: Could not update with payload\n",
626 rc = __cifs_calc_signature(&drqst, server, sigptr, shash);
628 memcpy(shdr->Signature, sigptr, SMB2_SIGNATURE_SIZE);
632 cifs_free_hash(&shash);
636 /* must be called with server->srv_mutex held */
638 smb2_sign_rqst(struct smb_rqst *rqst, struct TCP_Server_Info *server)
641 struct smb2_hdr *shdr;
642 struct smb2_sess_setup_req *ssr;
646 shdr = (struct smb2_hdr *)rqst->rq_iov[0].iov_base;
647 ssr = (struct smb2_sess_setup_req *)shdr;
649 is_binding = shdr->Command == SMB2_SESSION_SETUP &&
650 (ssr->Flags & SMB2_SESSION_REQ_FLAG_BINDING);
651 is_signed = shdr->Flags & SMB2_FLAGS_SIGNED;
655 spin_lock(&server->srv_lock);
656 if (server->ops->need_neg &&
657 server->ops->need_neg(server)) {
658 spin_unlock(&server->srv_lock);
661 spin_unlock(&server->srv_lock);
662 if (!is_binding && !server->session_estab) {
663 strncpy(shdr->Signature, "BSRSPYL", 8);
667 rc = server->ops->calc_signature(rqst, server, false);
673 smb2_verify_signature(struct smb_rqst *rqst, struct TCP_Server_Info *server)
676 char server_response_sig[SMB2_SIGNATURE_SIZE];
677 struct smb2_hdr *shdr =
678 (struct smb2_hdr *)rqst->rq_iov[0].iov_base;
680 if ((shdr->Command == SMB2_NEGOTIATE) ||
681 (shdr->Command == SMB2_SESSION_SETUP) ||
682 (shdr->Command == SMB2_OPLOCK_BREAK) ||
683 server->ignore_signature ||
684 (!server->session_estab))
688 * BB what if signatures are supposed to be on for session but
689 * server does not send one? BB
692 /* Do not need to verify session setups with signature "BSRSPYL " */
693 if (memcmp(shdr->Signature, "BSRSPYL ", 8) == 0)
694 cifs_dbg(FYI, "dummy signature received for smb command 0x%x\n",
698 * Save off the origiginal signature so we can modify the smb and check
699 * our calculated signature against what the server sent.
701 memcpy(server_response_sig, shdr->Signature, SMB2_SIGNATURE_SIZE);
703 memset(shdr->Signature, 0, SMB2_SIGNATURE_SIZE);
705 rc = server->ops->calc_signature(rqst, server, true);
710 if (memcmp(server_response_sig, shdr->Signature, SMB2_SIGNATURE_SIZE)) {
711 cifs_dbg(VFS, "sign fail cmd 0x%x message id 0x%llx\n",
712 shdr->Command, shdr->MessageId);
719 * Set message id for the request. Should be called after wait_for_free_request
720 * and when srv_mutex is held.
723 smb2_seq_num_into_buf(struct TCP_Server_Info *server,
724 struct smb2_hdr *shdr)
726 unsigned int i, num = le16_to_cpu(shdr->CreditCharge);
728 shdr->MessageId = get_next_mid64(server);
729 /* skip message numbers according to CreditCharge field */
730 for (i = 1; i < num; i++)
731 get_next_mid(server);
734 static struct mid_q_entry *
735 smb2_mid_entry_alloc(const struct smb2_hdr *shdr,
736 struct TCP_Server_Info *server)
738 struct mid_q_entry *temp;
739 unsigned int credits = le16_to_cpu(shdr->CreditCharge);
741 if (server == NULL) {
742 cifs_dbg(VFS, "Null TCP session in smb2_mid_entry_alloc\n");
746 temp = mempool_alloc(cifs_mid_poolp, GFP_NOFS);
747 memset(temp, 0, sizeof(struct mid_q_entry));
748 kref_init(&temp->refcount);
749 temp->mid = le64_to_cpu(shdr->MessageId);
750 temp->credits = credits > 0 ? credits : 1;
751 temp->pid = current->pid;
752 temp->command = shdr->Command; /* Always LE */
753 temp->when_alloc = jiffies;
754 temp->server = server;
757 * The default is for the mid to be synchronous, so the
758 * default callback just wakes up the current task.
760 get_task_struct(current);
761 temp->creator = current;
762 temp->callback = cifs_wake_up_task;
763 temp->callback_data = current;
765 atomic_inc(&mid_count);
766 temp->mid_state = MID_REQUEST_ALLOCATED;
767 trace_smb3_cmd_enter(le32_to_cpu(shdr->Id.SyncId.TreeId),
768 le64_to_cpu(shdr->SessionId),
769 le16_to_cpu(shdr->Command), temp->mid);
774 smb2_get_mid_entry(struct cifs_ses *ses, struct TCP_Server_Info *server,
775 struct smb2_hdr *shdr, struct mid_q_entry **mid)
777 spin_lock(&server->srv_lock);
778 if (server->tcpStatus == CifsExiting) {
779 spin_unlock(&server->srv_lock);
783 if (server->tcpStatus == CifsNeedReconnect) {
784 spin_unlock(&server->srv_lock);
785 cifs_dbg(FYI, "tcp session dead - return to caller to retry\n");
789 if (server->tcpStatus == CifsNeedNegotiate &&
790 shdr->Command != SMB2_NEGOTIATE) {
791 spin_unlock(&server->srv_lock);
794 spin_unlock(&server->srv_lock);
796 spin_lock(&ses->ses_lock);
797 if (ses->ses_status == SES_NEW) {
798 if ((shdr->Command != SMB2_SESSION_SETUP) &&
799 (shdr->Command != SMB2_NEGOTIATE)) {
800 spin_unlock(&ses->ses_lock);
803 /* else ok - we are setting up session */
806 if (ses->ses_status == SES_EXITING) {
807 if (shdr->Command != SMB2_LOGOFF) {
808 spin_unlock(&ses->ses_lock);
811 /* else ok - we are shutting down the session */
813 spin_unlock(&ses->ses_lock);
815 *mid = smb2_mid_entry_alloc(shdr, server);
818 spin_lock(&server->mid_lock);
819 list_add_tail(&(*mid)->qhead, &server->pending_mid_q);
820 spin_unlock(&server->mid_lock);
826 smb2_check_receive(struct mid_q_entry *mid, struct TCP_Server_Info *server,
829 unsigned int len = mid->resp_buf_size;
831 struct smb_rqst rqst = { .rq_iov = iov,
834 iov[0].iov_base = (char *)mid->resp_buf;
835 iov[0].iov_len = len;
837 dump_smb(mid->resp_buf, min_t(u32, 80, len));
838 /* convert the length into a more usable form */
839 if (len > 24 && server->sign && !mid->decrypted) {
842 rc = smb2_verify_signature(&rqst, server);
844 cifs_server_dbg(VFS, "SMB signature verification returned error = %d\n",
848 return map_smb2_to_linux_error(mid->resp_buf, log_error);
852 smb2_setup_request(struct cifs_ses *ses, struct TCP_Server_Info *server,
853 struct smb_rqst *rqst)
856 struct smb2_hdr *shdr =
857 (struct smb2_hdr *)rqst->rq_iov[0].iov_base;
858 struct mid_q_entry *mid;
860 smb2_seq_num_into_buf(server, shdr);
862 rc = smb2_get_mid_entry(ses, server, shdr, &mid);
864 revert_current_mid_from_hdr(server, shdr);
868 rc = smb2_sign_rqst(rqst, server);
870 revert_current_mid_from_hdr(server, shdr);
879 smb2_setup_async_request(struct TCP_Server_Info *server, struct smb_rqst *rqst)
882 struct smb2_hdr *shdr =
883 (struct smb2_hdr *)rqst->rq_iov[0].iov_base;
884 struct mid_q_entry *mid;
886 spin_lock(&server->srv_lock);
887 if (server->tcpStatus == CifsNeedNegotiate &&
888 shdr->Command != SMB2_NEGOTIATE) {
889 spin_unlock(&server->srv_lock);
890 return ERR_PTR(-EAGAIN);
892 spin_unlock(&server->srv_lock);
894 smb2_seq_num_into_buf(server, shdr);
896 mid = smb2_mid_entry_alloc(shdr, server);
898 revert_current_mid_from_hdr(server, shdr);
899 return ERR_PTR(-ENOMEM);
902 rc = smb2_sign_rqst(rqst, server);
904 revert_current_mid_from_hdr(server, shdr);
913 smb3_crypto_aead_allocate(struct TCP_Server_Info *server)
915 struct crypto_aead *tfm;
917 if (!server->secmech.enc) {
918 if ((server->cipher_type == SMB2_ENCRYPTION_AES128_GCM) ||
919 (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM))
920 tfm = crypto_alloc_aead("gcm(aes)", 0, 0);
922 tfm = crypto_alloc_aead("ccm(aes)", 0, 0);
924 cifs_server_dbg(VFS, "%s: Failed alloc encrypt aead\n",
928 server->secmech.enc = tfm;
931 if (!server->secmech.dec) {
932 if ((server->cipher_type == SMB2_ENCRYPTION_AES128_GCM) ||
933 (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM))
934 tfm = crypto_alloc_aead("gcm(aes)", 0, 0);
936 tfm = crypto_alloc_aead("ccm(aes)", 0, 0);
938 crypto_free_aead(server->secmech.enc);
939 server->secmech.enc = NULL;
940 cifs_server_dbg(VFS, "%s: Failed to alloc decrypt aead\n",
944 server->secmech.dec = tfm;