1 // SPDX-License-Identifier: GPL-2.0
3 #include <linux/ceph/ceph_debug.h>
6 #include <linux/module.h>
7 #include <linux/random.h>
8 #include <linux/slab.h>
10 #include <linux/ceph/decode.h>
11 #include <linux/ceph/auth.h>
12 #include <linux/ceph/ceph_features.h>
13 #include <linux/ceph/libceph.h>
14 #include <linux/ceph/messenger.h>
18 #include "auth_x_protocol.h"
20 static void ceph_x_validate_tickets(struct ceph_auth_client *ac, int *pneed);
22 static int ceph_x_is_authenticated(struct ceph_auth_client *ac)
24 struct ceph_x_info *xi = ac->private;
27 ceph_x_validate_tickets(ac, &need);
28 dout("ceph_x_is_authenticated want=%d need=%d have=%d\n",
29 ac->want_keys, need, xi->have_keys);
30 return (ac->want_keys & xi->have_keys) == ac->want_keys;
33 static int ceph_x_should_authenticate(struct ceph_auth_client *ac)
35 struct ceph_x_info *xi = ac->private;
38 ceph_x_validate_tickets(ac, &need);
39 dout("ceph_x_should_authenticate want=%d need=%d have=%d\n",
40 ac->want_keys, need, xi->have_keys);
44 static int ceph_x_encrypt_offset(void)
46 return sizeof(u32) + sizeof(struct ceph_x_encrypt_header);
49 static int ceph_x_encrypt_buflen(int ilen)
51 return ceph_x_encrypt_offset() + ilen + 16;
54 static int ceph_x_encrypt(struct ceph_crypto_key *secret, void *buf,
55 int buf_len, int plaintext_len)
57 struct ceph_x_encrypt_header *hdr = buf + sizeof(u32);
62 hdr->magic = cpu_to_le64(CEPHX_ENC_MAGIC);
64 ret = ceph_crypt(secret, true, buf + sizeof(u32), buf_len - sizeof(u32),
65 plaintext_len + sizeof(struct ceph_x_encrypt_header),
70 ceph_encode_32(&buf, ciphertext_len);
71 return sizeof(u32) + ciphertext_len;
74 static int __ceph_x_decrypt(struct ceph_crypto_key *secret, void *p,
77 struct ceph_x_encrypt_header *hdr = p;
81 ret = ceph_crypt(secret, false, p, ciphertext_len, ciphertext_len,
86 if (le64_to_cpu(hdr->magic) != CEPHX_ENC_MAGIC) {
87 pr_err("%s bad magic\n", __func__);
91 return plaintext_len - sizeof(*hdr);
94 static int ceph_x_decrypt(struct ceph_crypto_key *secret, void **p, void *end)
99 ceph_decode_32_safe(p, end, ciphertext_len, e_inval);
100 ceph_decode_need(p, end, ciphertext_len, e_inval);
102 ret = __ceph_x_decrypt(secret, *p, ciphertext_len);
106 *p += ciphertext_len;
114 * get existing (or insert new) ticket handler
116 static struct ceph_x_ticket_handler *
117 get_ticket_handler(struct ceph_auth_client *ac, int service)
119 struct ceph_x_ticket_handler *th;
120 struct ceph_x_info *xi = ac->private;
121 struct rb_node *parent = NULL, **p = &xi->ticket_handlers.rb_node;
125 th = rb_entry(parent, struct ceph_x_ticket_handler, node);
126 if (service < th->service)
128 else if (service > th->service)
135 th = kzalloc(sizeof(*th), GFP_NOFS);
137 return ERR_PTR(-ENOMEM);
138 th->service = service;
139 rb_link_node(&th->node, parent, p);
140 rb_insert_color(&th->node, &xi->ticket_handlers);
144 static void remove_ticket_handler(struct ceph_auth_client *ac,
145 struct ceph_x_ticket_handler *th)
147 struct ceph_x_info *xi = ac->private;
149 dout("remove_ticket_handler %p %d\n", th, th->service);
150 rb_erase(&th->node, &xi->ticket_handlers);
151 ceph_crypto_key_destroy(&th->session_key);
153 ceph_buffer_put(th->ticket_blob);
157 static int process_one_ticket(struct ceph_auth_client *ac,
158 struct ceph_crypto_key *secret,
161 struct ceph_x_info *xi = ac->private;
163 u8 tkt_struct_v, blob_struct_v;
164 struct ceph_x_ticket_handler *th;
168 struct timespec64 validity;
171 struct ceph_crypto_key new_session_key = { 0 };
172 struct ceph_buffer *new_ticket_blob;
173 time64_t new_expires, new_renew_after;
177 ceph_decode_need(p, end, sizeof(u32) + 1, bad);
179 type = ceph_decode_32(p);
180 dout(" ticket type %d %s\n", type, ceph_entity_type_name(type));
182 tkt_struct_v = ceph_decode_8(p);
183 if (tkt_struct_v != 1)
186 th = get_ticket_handler(ac, type);
193 dp = *p + ceph_x_encrypt_offset();
194 ret = ceph_x_decrypt(secret, p, end);
197 dout(" decrypted %d bytes\n", ret);
200 tkt_struct_v = ceph_decode_8(&dp);
201 if (tkt_struct_v != 1)
204 ret = ceph_crypto_key_decode(&new_session_key, &dp, dend);
208 ceph_decode_timespec64(&validity, dp);
209 dp += sizeof(struct ceph_timespec);
210 new_expires = ktime_get_real_seconds() + validity.tv_sec;
211 new_renew_after = new_expires - (validity.tv_sec / 4);
212 dout(" expires=%llu renew_after=%llu\n", new_expires,
215 /* ticket blob for service */
216 ceph_decode_8_safe(p, end, is_enc, bad);
219 tp = *p + ceph_x_encrypt_offset();
220 ret = ceph_x_decrypt(&th->session_key, p, end);
223 dout(" encrypted ticket, decrypted %d bytes\n", ret);
231 ceph_decode_32_safe(ptp, tpend, dlen, bad);
232 dout(" ticket blob is %d bytes\n", dlen);
233 ceph_decode_need(ptp, tpend, 1 + sizeof(u64), bad);
234 blob_struct_v = ceph_decode_8(ptp);
235 if (blob_struct_v != 1)
238 new_secret_id = ceph_decode_64(ptp);
239 ret = ceph_decode_buffer(&new_ticket_blob, ptp, tpend);
243 /* all is well, update our ticket */
244 ceph_crypto_key_destroy(&th->session_key);
246 ceph_buffer_put(th->ticket_blob);
247 th->session_key = new_session_key;
248 th->ticket_blob = new_ticket_blob;
249 th->secret_id = new_secret_id;
250 th->expires = new_expires;
251 th->renew_after = new_renew_after;
253 dout(" got ticket service %d (%s) secret_id %lld len %d\n",
254 type, ceph_entity_type_name(type), th->secret_id,
255 (int)th->ticket_blob->vec.iov_len);
256 xi->have_keys |= th->service;
262 ceph_crypto_key_destroy(&new_session_key);
266 static int ceph_x_proc_ticket_reply(struct ceph_auth_client *ac,
267 struct ceph_crypto_key *secret,
268 void *buf, void *end)
275 ceph_decode_8_safe(&p, end, reply_struct_v, bad);
276 if (reply_struct_v != 1)
279 ceph_decode_32_safe(&p, end, num, bad);
280 dout("%d tickets\n", num);
283 ret = process_one_ticket(ac, secret, &p, end);
295 * Encode and encrypt the second part (ceph_x_authorize_b) of the
296 * authorizer. The first part (ceph_x_authorize_a) should already be
299 static int encrypt_authorizer(struct ceph_x_authorizer *au,
300 u64 *server_challenge)
302 struct ceph_x_authorize_a *msg_a;
303 struct ceph_x_authorize_b *msg_b;
307 msg_a = au->buf->vec.iov_base;
308 WARN_ON(msg_a->ticket_blob.secret_id != cpu_to_le64(au->secret_id));
309 p = (void *)(msg_a + 1) + le32_to_cpu(msg_a->ticket_blob.blob_len);
310 end = au->buf->vec.iov_base + au->buf->vec.iov_len;
312 msg_b = p + ceph_x_encrypt_offset();
314 msg_b->nonce = cpu_to_le64(au->nonce);
315 if (server_challenge) {
316 msg_b->have_challenge = 1;
317 msg_b->server_challenge_plus_one =
318 cpu_to_le64(*server_challenge + 1);
320 msg_b->have_challenge = 0;
321 msg_b->server_challenge_plus_one = 0;
324 ret = ceph_x_encrypt(&au->session_key, p, end - p, sizeof(*msg_b));
329 if (server_challenge) {
333 au->buf->vec.iov_len = p - au->buf->vec.iov_base;
339 static void ceph_x_authorizer_cleanup(struct ceph_x_authorizer *au)
341 ceph_crypto_key_destroy(&au->session_key);
343 ceph_buffer_put(au->buf);
348 static int ceph_x_build_authorizer(struct ceph_auth_client *ac,
349 struct ceph_x_ticket_handler *th,
350 struct ceph_x_authorizer *au)
353 struct ceph_x_authorize_a *msg_a;
354 struct ceph_x_authorize_b *msg_b;
356 int ticket_blob_len =
357 (th->ticket_blob ? th->ticket_blob->vec.iov_len : 0);
359 dout("build_authorizer for %s %p\n",
360 ceph_entity_type_name(th->service), au);
362 ceph_crypto_key_destroy(&au->session_key);
363 ret = ceph_crypto_key_clone(&au->session_key, &th->session_key);
367 maxlen = sizeof(*msg_a) + ticket_blob_len +
368 ceph_x_encrypt_buflen(sizeof(*msg_b));
369 dout(" need len %d\n", maxlen);
370 if (au->buf && au->buf->alloc_len < maxlen) {
371 ceph_buffer_put(au->buf);
375 au->buf = ceph_buffer_new(maxlen, GFP_NOFS);
381 au->service = th->service;
382 au->secret_id = th->secret_id;
384 msg_a = au->buf->vec.iov_base;
386 msg_a->global_id = cpu_to_le64(ac->global_id);
387 msg_a->service_id = cpu_to_le32(th->service);
388 msg_a->ticket_blob.struct_v = 1;
389 msg_a->ticket_blob.secret_id = cpu_to_le64(th->secret_id);
390 msg_a->ticket_blob.blob_len = cpu_to_le32(ticket_blob_len);
391 if (ticket_blob_len) {
392 memcpy(msg_a->ticket_blob.blob, th->ticket_blob->vec.iov_base,
393 th->ticket_blob->vec.iov_len);
395 dout(" th %p secret_id %lld %lld\n", th, th->secret_id,
396 le64_to_cpu(msg_a->ticket_blob.secret_id));
398 get_random_bytes(&au->nonce, sizeof(au->nonce));
399 ret = encrypt_authorizer(au, NULL);
401 pr_err("failed to encrypt authorizer: %d", ret);
405 dout(" built authorizer nonce %llx len %d\n", au->nonce,
406 (int)au->buf->vec.iov_len);
410 ceph_x_authorizer_cleanup(au);
414 static int ceph_x_encode_ticket(struct ceph_x_ticket_handler *th,
417 ceph_decode_need(p, end, 1 + sizeof(u64), bad);
419 ceph_encode_64(p, th->secret_id);
420 if (th->ticket_blob) {
421 const char *buf = th->ticket_blob->vec.iov_base;
422 u32 len = th->ticket_blob->vec.iov_len;
424 ceph_encode_32_safe(p, end, len, bad);
425 ceph_encode_copy_safe(p, end, buf, len, bad);
427 ceph_encode_32_safe(p, end, 0, bad);
435 static bool need_key(struct ceph_x_ticket_handler *th)
440 return ktime_get_real_seconds() >= th->renew_after;
443 static bool have_key(struct ceph_x_ticket_handler *th)
446 if (ktime_get_real_seconds() >= th->expires)
447 th->have_key = false;
453 static void ceph_x_validate_tickets(struct ceph_auth_client *ac, int *pneed)
455 int want = ac->want_keys;
456 struct ceph_x_info *xi = ac->private;
459 *pneed = ac->want_keys & ~(xi->have_keys);
461 for (service = 1; service <= want; service <<= 1) {
462 struct ceph_x_ticket_handler *th;
464 if (!(ac->want_keys & service))
467 if (*pneed & service)
470 th = get_ticket_handler(ac, service);
479 xi->have_keys &= ~service;
483 static int ceph_x_build_request(struct ceph_auth_client *ac,
484 void *buf, void *end)
486 struct ceph_x_info *xi = ac->private;
488 struct ceph_x_request_header *head = buf;
490 struct ceph_x_ticket_handler *th =
491 get_ticket_handler(ac, CEPH_ENTITY_TYPE_AUTH);
496 ceph_x_validate_tickets(ac, &need);
498 dout("build_request want %x have %x need %x\n",
499 ac->want_keys, xi->have_keys, need);
501 if (need & CEPH_ENTITY_TYPE_AUTH) {
502 struct ceph_x_authenticate *auth = (void *)(head + 1);
504 void *enc_buf = xi->auth_authorizer.enc_buf;
505 struct ceph_x_challenge_blob *blob = enc_buf +
506 ceph_x_encrypt_offset();
512 dout(" get_auth_session_key\n");
513 head->op = cpu_to_le16(CEPHX_GET_AUTH_SESSION_KEY);
515 /* encrypt and hash */
516 get_random_bytes(&auth->client_challenge, sizeof(u64));
517 blob->client_challenge = auth->client_challenge;
518 blob->server_challenge = cpu_to_le64(xi->server_challenge);
519 ret = ceph_x_encrypt(&xi->secret, enc_buf, CEPHX_AU_ENC_BUF_LEN,
526 for (u = (u64 *)enc_buf; u + 1 <= (u64 *)(enc_buf + ret); u++)
527 auth->key ^= *(__le64 *)u;
528 dout(" server_challenge %llx client_challenge %llx key %llx\n",
529 xi->server_challenge, le64_to_cpu(auth->client_challenge),
530 le64_to_cpu(auth->key));
532 /* now encode the old ticket if exists */
533 ret = ceph_x_encode_ticket(th, &p, end);
542 struct ceph_x_service_ticket_request *req;
546 head->op = cpu_to_le16(CEPHX_GET_PRINCIPAL_SESSION_KEY);
548 ret = ceph_x_build_authorizer(ac, th, &xi->auth_authorizer);
551 ceph_encode_copy(&p, xi->auth_authorizer.buf->vec.iov_base,
552 xi->auth_authorizer.buf->vec.iov_len);
555 req->keys = cpu_to_le32(need);
563 static int ceph_x_handle_reply(struct ceph_auth_client *ac, int result,
564 void *buf, void *end)
566 struct ceph_x_info *xi = ac->private;
567 struct ceph_x_reply_header *head = buf;
568 struct ceph_x_ticket_handler *th;
574 return result; /* XXX hmm? */
578 struct ceph_x_server_challenge *sc = buf;
580 if (len != sizeof(*sc))
582 xi->server_challenge = le64_to_cpu(sc->server_challenge);
583 dout("handle_reply got server challenge %llx\n",
584 xi->server_challenge);
585 xi->starting = false;
586 xi->have_keys &= ~CEPH_ENTITY_TYPE_AUTH;
590 op = le16_to_cpu(head->op);
591 result = le32_to_cpu(head->result);
592 dout("handle_reply op %d result %d\n", op, result);
594 case CEPHX_GET_AUTH_SESSION_KEY:
595 /* verify auth key */
596 ret = ceph_x_proc_ticket_reply(ac, &xi->secret,
597 buf + sizeof(*head), end);
600 case CEPHX_GET_PRINCIPAL_SESSION_KEY:
601 th = get_ticket_handler(ac, CEPH_ENTITY_TYPE_AUTH);
604 ret = ceph_x_proc_ticket_reply(ac, &th->session_key,
605 buf + sizeof(*head), end);
613 if (ac->want_keys == xi->have_keys)
618 static void ceph_x_destroy_authorizer(struct ceph_authorizer *a)
620 struct ceph_x_authorizer *au = (void *)a;
622 ceph_x_authorizer_cleanup(au);
626 static int ceph_x_create_authorizer(
627 struct ceph_auth_client *ac, int peer_type,
628 struct ceph_auth_handshake *auth)
630 struct ceph_x_authorizer *au;
631 struct ceph_x_ticket_handler *th;
634 th = get_ticket_handler(ac, peer_type);
638 au = kzalloc(sizeof(*au), GFP_NOFS);
642 au->base.destroy = ceph_x_destroy_authorizer;
644 ret = ceph_x_build_authorizer(ac, th, au);
650 auth->authorizer = (struct ceph_authorizer *) au;
651 auth->authorizer_buf = au->buf->vec.iov_base;
652 auth->authorizer_buf_len = au->buf->vec.iov_len;
653 auth->authorizer_reply_buf = au->enc_buf;
654 auth->authorizer_reply_buf_len = CEPHX_AU_ENC_BUF_LEN;
655 auth->sign_message = ac->ops->sign_message;
656 auth->check_message_signature = ac->ops->check_message_signature;
661 static int ceph_x_update_authorizer(
662 struct ceph_auth_client *ac, int peer_type,
663 struct ceph_auth_handshake *auth)
665 struct ceph_x_authorizer *au;
666 struct ceph_x_ticket_handler *th;
668 th = get_ticket_handler(ac, peer_type);
672 au = (struct ceph_x_authorizer *)auth->authorizer;
673 if (au->secret_id < th->secret_id) {
674 dout("ceph_x_update_authorizer service %u secret %llu < %llu\n",
675 au->service, au->secret_id, th->secret_id);
676 return ceph_x_build_authorizer(ac, th, au);
681 static int decrypt_authorize_challenge(struct ceph_x_authorizer *au,
683 int challenge_buf_len,
684 u64 *server_challenge)
686 struct ceph_x_authorize_challenge *ch =
687 challenge_buf + sizeof(struct ceph_x_encrypt_header);
691 ret = __ceph_x_decrypt(&au->session_key, challenge_buf,
695 if (ret < sizeof(*ch)) {
696 pr_err("bad size %d for ceph_x_authorize_challenge\n", ret);
700 *server_challenge = le64_to_cpu(ch->server_challenge);
704 static int ceph_x_add_authorizer_challenge(struct ceph_auth_client *ac,
705 struct ceph_authorizer *a,
707 int challenge_buf_len)
709 struct ceph_x_authorizer *au = (void *)a;
710 u64 server_challenge;
713 ret = decrypt_authorize_challenge(au, challenge_buf, challenge_buf_len,
716 pr_err("failed to decrypt authorize challenge: %d", ret);
720 ret = encrypt_authorizer(au, &server_challenge);
722 pr_err("failed to encrypt authorizer w/ challenge: %d", ret);
729 static int ceph_x_verify_authorizer_reply(struct ceph_auth_client *ac,
730 struct ceph_authorizer *a)
732 struct ceph_x_authorizer *au = (void *)a;
733 void *p = au->enc_buf;
734 struct ceph_x_authorize_reply *reply = p + ceph_x_encrypt_offset();
737 ret = ceph_x_decrypt(&au->session_key, &p, p + CEPHX_AU_ENC_BUF_LEN);
740 if (ret < sizeof(*reply)) {
741 pr_err("bad size %d for ceph_x_authorize_reply\n", ret);
745 if (au->nonce + 1 != le64_to_cpu(reply->nonce_plus_one))
749 dout("verify_authorizer_reply nonce %llx got %llx ret %d\n",
750 au->nonce, le64_to_cpu(reply->nonce_plus_one), ret);
754 static void ceph_x_reset(struct ceph_auth_client *ac)
756 struct ceph_x_info *xi = ac->private;
760 xi->server_challenge = 0;
763 static void ceph_x_destroy(struct ceph_auth_client *ac)
765 struct ceph_x_info *xi = ac->private;
768 dout("ceph_x_destroy %p\n", ac);
769 ceph_crypto_key_destroy(&xi->secret);
771 while ((p = rb_first(&xi->ticket_handlers)) != NULL) {
772 struct ceph_x_ticket_handler *th =
773 rb_entry(p, struct ceph_x_ticket_handler, node);
774 remove_ticket_handler(ac, th);
777 ceph_x_authorizer_cleanup(&xi->auth_authorizer);
783 static void invalidate_ticket(struct ceph_auth_client *ac, int peer_type)
785 struct ceph_x_ticket_handler *th;
787 th = get_ticket_handler(ac, peer_type);
789 th->have_key = false;
792 static void ceph_x_invalidate_authorizer(struct ceph_auth_client *ac,
796 * We are to invalidate a service ticket in the hopes of
797 * getting a new, hopefully more valid, one. But, we won't get
798 * it unless our AUTH ticket is good, so invalidate AUTH ticket
799 * as well, just in case.
801 invalidate_ticket(ac, peer_type);
802 invalidate_ticket(ac, CEPH_ENTITY_TYPE_AUTH);
805 static int calc_signature(struct ceph_x_authorizer *au, struct ceph_msg *msg,
808 void *enc_buf = au->enc_buf;
811 if (!CEPH_HAVE_FEATURE(msg->con->peer_features, CEPHX_V2)) {
818 } __packed *sigblock = enc_buf + ceph_x_encrypt_offset();
820 sigblock->len = cpu_to_le32(4*sizeof(u32));
821 sigblock->header_crc = msg->hdr.crc;
822 sigblock->front_crc = msg->footer.front_crc;
823 sigblock->middle_crc = msg->footer.middle_crc;
824 sigblock->data_crc = msg->footer.data_crc;
826 ret = ceph_x_encrypt(&au->session_key, enc_buf,
827 CEPHX_AU_ENC_BUF_LEN, sizeof(*sigblock));
831 *psig = *(__le64 *)(enc_buf + sizeof(u32));
841 __le32 seq_lower_word;
842 } __packed *sigblock = enc_buf;
845 } __packed *penc = enc_buf;
848 sigblock->header_crc = msg->hdr.crc;
849 sigblock->front_crc = msg->footer.front_crc;
850 sigblock->front_len = msg->hdr.front_len;
851 sigblock->middle_crc = msg->footer.middle_crc;
852 sigblock->middle_len = msg->hdr.middle_len;
853 sigblock->data_crc = msg->footer.data_crc;
854 sigblock->data_len = msg->hdr.data_len;
855 sigblock->seq_lower_word = *(__le32 *)&msg->hdr.seq;
857 /* no leading len, no ceph_x_encrypt_header */
858 ret = ceph_crypt(&au->session_key, true, enc_buf,
859 CEPHX_AU_ENC_BUF_LEN, sizeof(*sigblock),
864 *psig = penc->a ^ penc->b ^ penc->c ^ penc->d;
870 static int ceph_x_sign_message(struct ceph_auth_handshake *auth,
871 struct ceph_msg *msg)
876 if (ceph_test_opt(from_msgr(msg->con->msgr), NOMSGSIGN))
879 ret = calc_signature((struct ceph_x_authorizer *)auth->authorizer,
884 msg->footer.sig = sig;
885 msg->footer.flags |= CEPH_MSG_FOOTER_SIGNED;
889 static int ceph_x_check_message_signature(struct ceph_auth_handshake *auth,
890 struct ceph_msg *msg)
895 if (ceph_test_opt(from_msgr(msg->con->msgr), NOMSGSIGN))
898 ret = calc_signature((struct ceph_x_authorizer *)auth->authorizer,
902 if (sig_check == msg->footer.sig)
904 if (msg->footer.flags & CEPH_MSG_FOOTER_SIGNED)
905 dout("ceph_x_check_message_signature %p has signature %llx "
906 "expect %llx\n", msg, msg->footer.sig, sig_check);
908 dout("ceph_x_check_message_signature %p sender did not set "
909 "CEPH_MSG_FOOTER_SIGNED\n", msg);
913 static const struct ceph_auth_client_ops ceph_x_ops = {
915 .is_authenticated = ceph_x_is_authenticated,
916 .should_authenticate = ceph_x_should_authenticate,
917 .build_request = ceph_x_build_request,
918 .handle_reply = ceph_x_handle_reply,
919 .create_authorizer = ceph_x_create_authorizer,
920 .update_authorizer = ceph_x_update_authorizer,
921 .add_authorizer_challenge = ceph_x_add_authorizer_challenge,
922 .verify_authorizer_reply = ceph_x_verify_authorizer_reply,
923 .invalidate_authorizer = ceph_x_invalidate_authorizer,
924 .reset = ceph_x_reset,
925 .destroy = ceph_x_destroy,
926 .sign_message = ceph_x_sign_message,
927 .check_message_signature = ceph_x_check_message_signature,
931 int ceph_x_init(struct ceph_auth_client *ac)
933 struct ceph_x_info *xi;
936 dout("ceph_x_init %p\n", ac);
938 xi = kzalloc(sizeof(*xi), GFP_NOFS);
944 pr_err("no secret set (for auth_x protocol)\n");
948 ret = ceph_crypto_key_clone(&xi->secret, ac->key);
950 pr_err("cannot clone key: %d\n", ret);
955 xi->ticket_handlers = RB_ROOT;
957 ac->protocol = CEPH_AUTH_CEPHX;
959 ac->ops = &ceph_x_ops;