2 * Neil Brown <neilb@cse.unsw.edu.au>
3 * J. Bruce Fields <bfields@umich.edu>
4 * Andy Adamson <andros@umich.edu>
5 * Dug Song <dugsong@monkey.org>
7 * RPCSEC_GSS server authentication.
8 * This implements RPCSEC_GSS as defined in rfc2203 (rpcsec_gss) and rfc2078
11 * The RPCSEC_GSS involves three stages:
14 * 3/ context destruction
16 * Context creation is handled largely by upcalls to user-space.
17 * In particular, GSS_Accept_sec_context is handled by an upcall
18 * Data exchange is handled entirely within the kernel
19 * In particular, GSS_GetMIC, GSS_VerifyMIC, GSS_Seal, GSS_Unseal are in-kernel.
20 * Context destruction is handled in-kernel
21 * GSS_Delete_sec_context is in-kernel
23 * Context creation is initiated by a RPCSEC_GSS_INIT request arriving.
24 * The context handle and gss_token are used as a key into the rpcsec_init cache.
25 * The content of this cache includes some of the outputs of GSS_Accept_sec_context,
26 * being major_status, minor_status, context_handle, reply_token.
27 * These are sent back to the client.
28 * Sequence window management is handled by the kernel. The window size if currently
29 * a compile time constant.
31 * When user-space is happy that a context is established, it places an entry
32 * in the rpcsec_context cache. The key for this cache is the context_handle.
33 * The content includes:
34 * uid/gidlist - for determining access rights
36 * mechanism specific information, such as a key
40 #include <linux/slab.h>
41 #include <linux/types.h>
42 #include <linux/module.h>
43 #include <linux/pagemap.h>
44 #include <linux/user_namespace.h>
46 #include <linux/sunrpc/auth_gss.h>
47 #include <linux/sunrpc/gss_err.h>
48 #include <linux/sunrpc/svcauth.h>
49 #include <linux/sunrpc/svcauth_gss.h>
50 #include <linux/sunrpc/cache.h>
51 #include "gss_rpc_upcall.h"
54 #if IS_ENABLED(CONFIG_SUNRPC_DEBUG)
55 # define RPCDBG_FACILITY RPCDBG_AUTH
58 /* The rpcsec_init cache is used for mapping RPCSEC_GSS_{,CONT_}INIT requests
61 * Key is context handle (\x if empty) and gss_token.
62 * Content is major_status minor_status (integers) context_handle, reply_token.
66 static int netobj_equal(struct xdr_netobj *a, struct xdr_netobj *b)
68 return a->len == b->len && 0 == memcmp(a->data, b->data, a->len);
71 #define RSI_HASHBITS 6
72 #define RSI_HASHMAX (1<<RSI_HASHBITS)
76 struct xdr_netobj in_handle, in_token;
77 struct xdr_netobj out_handle, out_token;
78 int major_status, minor_status;
81 static struct rsi *rsi_update(struct cache_detail *cd, struct rsi *new, struct rsi *old);
82 static struct rsi *rsi_lookup(struct cache_detail *cd, struct rsi *item);
84 static void rsi_free(struct rsi *rsii)
86 kfree(rsii->in_handle.data);
87 kfree(rsii->in_token.data);
88 kfree(rsii->out_handle.data);
89 kfree(rsii->out_token.data);
92 static void rsi_put(struct kref *ref)
94 struct rsi *rsii = container_of(ref, struct rsi, h.ref);
99 static inline int rsi_hash(struct rsi *item)
101 return hash_mem(item->in_handle.data, item->in_handle.len, RSI_HASHBITS)
102 ^ hash_mem(item->in_token.data, item->in_token.len, RSI_HASHBITS);
105 static int rsi_match(struct cache_head *a, struct cache_head *b)
107 struct rsi *item = container_of(a, struct rsi, h);
108 struct rsi *tmp = container_of(b, struct rsi, h);
109 return netobj_equal(&item->in_handle, &tmp->in_handle) &&
110 netobj_equal(&item->in_token, &tmp->in_token);
113 static int dup_to_netobj(struct xdr_netobj *dst, char *src, int len)
116 dst->data = (len ? kmemdup(src, len, GFP_KERNEL) : NULL);
117 if (len && !dst->data)
122 static inline int dup_netobj(struct xdr_netobj *dst, struct xdr_netobj *src)
124 return dup_to_netobj(dst, src->data, src->len);
127 static void rsi_init(struct cache_head *cnew, struct cache_head *citem)
129 struct rsi *new = container_of(cnew, struct rsi, h);
130 struct rsi *item = container_of(citem, struct rsi, h);
132 new->out_handle.data = NULL;
133 new->out_handle.len = 0;
134 new->out_token.data = NULL;
135 new->out_token.len = 0;
136 new->in_handle.len = item->in_handle.len;
137 item->in_handle.len = 0;
138 new->in_token.len = item->in_token.len;
139 item->in_token.len = 0;
140 new->in_handle.data = item->in_handle.data;
141 item->in_handle.data = NULL;
142 new->in_token.data = item->in_token.data;
143 item->in_token.data = NULL;
146 static void update_rsi(struct cache_head *cnew, struct cache_head *citem)
148 struct rsi *new = container_of(cnew, struct rsi, h);
149 struct rsi *item = container_of(citem, struct rsi, h);
151 BUG_ON(new->out_handle.data || new->out_token.data);
152 new->out_handle.len = item->out_handle.len;
153 item->out_handle.len = 0;
154 new->out_token.len = item->out_token.len;
155 item->out_token.len = 0;
156 new->out_handle.data = item->out_handle.data;
157 item->out_handle.data = NULL;
158 new->out_token.data = item->out_token.data;
159 item->out_token.data = NULL;
161 new->major_status = item->major_status;
162 new->minor_status = item->minor_status;
165 static struct cache_head *rsi_alloc(void)
167 struct rsi *rsii = kmalloc(sizeof(*rsii), GFP_KERNEL);
174 static void rsi_request(struct cache_detail *cd,
175 struct cache_head *h,
176 char **bpp, int *blen)
178 struct rsi *rsii = container_of(h, struct rsi, h);
180 qword_addhex(bpp, blen, rsii->in_handle.data, rsii->in_handle.len);
181 qword_addhex(bpp, blen, rsii->in_token.data, rsii->in_token.len);
185 static int rsi_parse(struct cache_detail *cd,
186 char *mesg, int mlen)
188 /* context token expiry major minor context token */
192 struct rsi rsii, *rsip = NULL;
194 int status = -EINVAL;
196 memset(&rsii, 0, sizeof(rsii));
198 len = qword_get(&mesg, buf, mlen);
202 if (dup_to_netobj(&rsii.in_handle, buf, len))
206 len = qword_get(&mesg, buf, mlen);
211 if (dup_to_netobj(&rsii.in_token, buf, len))
214 rsip = rsi_lookup(cd, &rsii);
220 expiry = get_expiry(&mesg);
226 len = qword_get(&mesg, buf, mlen);
229 rsii.major_status = simple_strtoul(buf, &ep, 10);
232 len = qword_get(&mesg, buf, mlen);
235 rsii.minor_status = simple_strtoul(buf, &ep, 10);
240 len = qword_get(&mesg, buf, mlen);
244 if (dup_to_netobj(&rsii.out_handle, buf, len))
248 len = qword_get(&mesg, buf, mlen);
253 if (dup_to_netobj(&rsii.out_token, buf, len))
255 rsii.h.expiry_time = expiry;
256 rsip = rsi_update(cd, &rsii, rsip);
261 cache_put(&rsip->h, cd);
267 static const struct cache_detail rsi_cache_template = {
268 .owner = THIS_MODULE,
269 .hash_size = RSI_HASHMAX,
270 .name = "auth.rpcsec.init",
271 .cache_put = rsi_put,
272 .cache_request = rsi_request,
273 .cache_parse = rsi_parse,
276 .update = update_rsi,
280 static struct rsi *rsi_lookup(struct cache_detail *cd, struct rsi *item)
282 struct cache_head *ch;
283 int hash = rsi_hash(item);
285 ch = sunrpc_cache_lookup(cd, &item->h, hash);
287 return container_of(ch, struct rsi, h);
292 static struct rsi *rsi_update(struct cache_detail *cd, struct rsi *new, struct rsi *old)
294 struct cache_head *ch;
295 int hash = rsi_hash(new);
297 ch = sunrpc_cache_update(cd, &new->h,
300 return container_of(ch, struct rsi, h);
307 * The rpcsec_context cache is used to store a context that is
308 * used in data exchange.
309 * The key is a context handle. The content is:
310 * uid, gidlist, mechanism, service-set, mech-specific-data
313 #define RSC_HASHBITS 10
314 #define RSC_HASHMAX (1<<RSC_HASHBITS)
316 #define GSS_SEQ_WIN 128
318 struct gss_svc_seq_data {
319 /* highest seq number seen so far: */
321 /* for i such that sd_max-GSS_SEQ_WIN < i <= sd_max, the i-th bit of
322 * sd_win is nonzero iff sequence number i has been seen already: */
323 unsigned long sd_win[GSS_SEQ_WIN/BITS_PER_LONG];
329 struct xdr_netobj handle;
330 struct svc_cred cred;
331 struct gss_svc_seq_data seqdata;
332 struct gss_ctx *mechctx;
335 static struct rsc *rsc_update(struct cache_detail *cd, struct rsc *new, struct rsc *old);
336 static struct rsc *rsc_lookup(struct cache_detail *cd, struct rsc *item);
338 static void rsc_free(struct rsc *rsci)
340 kfree(rsci->handle.data);
342 gss_delete_sec_context(&rsci->mechctx);
343 free_svc_cred(&rsci->cred);
346 static void rsc_put(struct kref *ref)
348 struct rsc *rsci = container_of(ref, struct rsc, h.ref);
355 rsc_hash(struct rsc *rsci)
357 return hash_mem(rsci->handle.data, rsci->handle.len, RSC_HASHBITS);
361 rsc_match(struct cache_head *a, struct cache_head *b)
363 struct rsc *new = container_of(a, struct rsc, h);
364 struct rsc *tmp = container_of(b, struct rsc, h);
366 return netobj_equal(&new->handle, &tmp->handle);
370 rsc_init(struct cache_head *cnew, struct cache_head *ctmp)
372 struct rsc *new = container_of(cnew, struct rsc, h);
373 struct rsc *tmp = container_of(ctmp, struct rsc, h);
375 new->handle.len = tmp->handle.len;
377 new->handle.data = tmp->handle.data;
378 tmp->handle.data = NULL;
380 init_svc_cred(&new->cred);
384 update_rsc(struct cache_head *cnew, struct cache_head *ctmp)
386 struct rsc *new = container_of(cnew, struct rsc, h);
387 struct rsc *tmp = container_of(ctmp, struct rsc, h);
389 new->mechctx = tmp->mechctx;
391 memset(&new->seqdata, 0, sizeof(new->seqdata));
392 spin_lock_init(&new->seqdata.sd_lock);
393 new->cred = tmp->cred;
394 init_svc_cred(&tmp->cred);
397 static struct cache_head *
400 struct rsc *rsci = kmalloc(sizeof(*rsci), GFP_KERNEL);
407 static int rsc_parse(struct cache_detail *cd,
408 char *mesg, int mlen)
410 /* contexthandle expiry [ uid gid N <n gids> mechname ...mechdata... ] */
414 struct rsc rsci, *rscp = NULL;
416 int status = -EINVAL;
417 struct gss_api_mech *gm = NULL;
419 memset(&rsci, 0, sizeof(rsci));
421 len = qword_get(&mesg, buf, mlen);
422 if (len < 0) goto out;
424 if (dup_to_netobj(&rsci.handle, buf, len))
429 expiry = get_expiry(&mesg);
434 rscp = rsc_lookup(cd, &rsci);
438 /* uid, or NEGATIVE */
439 rv = get_int(&mesg, &id);
443 set_bit(CACHE_NEGATIVE, &rsci.h.flags);
448 * NOTE: we skip uid_valid()/gid_valid() checks here:
449 * instead, * -1 id's are later mapped to the
450 * (export-specific) anonymous id by nfsd_setuser.
452 * (But supplementary gid's get no such special
453 * treatment so are checked for validity here.)
456 rsci.cred.cr_uid = make_kuid(&init_user_ns, id);
459 if (get_int(&mesg, &id))
461 rsci.cred.cr_gid = make_kgid(&init_user_ns, id);
463 /* number of additional gid's */
464 if (get_int(&mesg, &N))
466 if (N < 0 || N > NGROUPS_MAX)
469 rsci.cred.cr_group_info = groups_alloc(N);
470 if (rsci.cred.cr_group_info == NULL)
475 for (i=0; i<N; i++) {
477 if (get_int(&mesg, &id))
479 kgid = make_kgid(&init_user_ns, id);
480 if (!gid_valid(kgid))
482 rsci.cred.cr_group_info->gid[i] = kgid;
484 groups_sort(rsci.cred.cr_group_info);
487 len = qword_get(&mesg, buf, mlen);
490 gm = rsci.cred.cr_gss_mech = gss_mech_get_by_name(buf);
491 status = -EOPNOTSUPP;
496 /* mech-specific data: */
497 len = qword_get(&mesg, buf, mlen);
500 status = gss_import_sec_context(buf, len, gm, &rsci.mechctx,
505 /* get client name */
506 len = qword_get(&mesg, buf, mlen);
508 rsci.cred.cr_principal = kstrdup(buf, GFP_KERNEL);
509 if (!rsci.cred.cr_principal) {
516 rsci.h.expiry_time = expiry;
517 rscp = rsc_update(cd, &rsci, rscp);
522 cache_put(&rscp->h, cd);
528 static const struct cache_detail rsc_cache_template = {
529 .owner = THIS_MODULE,
530 .hash_size = RSC_HASHMAX,
531 .name = "auth.rpcsec.context",
532 .cache_put = rsc_put,
533 .cache_parse = rsc_parse,
536 .update = update_rsc,
540 static struct rsc *rsc_lookup(struct cache_detail *cd, struct rsc *item)
542 struct cache_head *ch;
543 int hash = rsc_hash(item);
545 ch = sunrpc_cache_lookup(cd, &item->h, hash);
547 return container_of(ch, struct rsc, h);
552 static struct rsc *rsc_update(struct cache_detail *cd, struct rsc *new, struct rsc *old)
554 struct cache_head *ch;
555 int hash = rsc_hash(new);
557 ch = sunrpc_cache_update(cd, &new->h,
560 return container_of(ch, struct rsc, h);
567 gss_svc_searchbyctx(struct cache_detail *cd, struct xdr_netobj *handle)
572 memset(&rsci, 0, sizeof(rsci));
573 if (dup_to_netobj(&rsci.handle, handle->data, handle->len))
575 found = rsc_lookup(cd, &rsci);
579 if (cache_check(cd, &found->h, NULL))
584 /* Implements sequence number algorithm as specified in RFC 2203. */
586 gss_check_seq_num(struct rsc *rsci, int seq_num)
588 struct gss_svc_seq_data *sd = &rsci->seqdata;
590 spin_lock(&sd->sd_lock);
591 if (seq_num > sd->sd_max) {
592 if (seq_num >= sd->sd_max + GSS_SEQ_WIN) {
593 memset(sd->sd_win,0,sizeof(sd->sd_win));
594 sd->sd_max = seq_num;
595 } else while (sd->sd_max < seq_num) {
597 __clear_bit(sd->sd_max % GSS_SEQ_WIN, sd->sd_win);
599 __set_bit(seq_num % GSS_SEQ_WIN, sd->sd_win);
601 } else if (seq_num <= sd->sd_max - GSS_SEQ_WIN) {
604 /* sd_max - GSS_SEQ_WIN < seq_num <= sd_max */
605 if (__test_and_set_bit(seq_num % GSS_SEQ_WIN, sd->sd_win))
608 spin_unlock(&sd->sd_lock);
611 spin_unlock(&sd->sd_lock);
615 static inline u32 round_up_to_quad(u32 i)
617 return (i + 3 ) & ~3;
621 svc_safe_getnetobj(struct kvec *argv, struct xdr_netobj *o)
625 if (argv->iov_len < 4)
627 o->len = svc_getnl(argv);
628 l = round_up_to_quad(o->len);
629 if (argv->iov_len < l)
631 o->data = argv->iov_base;
638 svc_safe_putnetobj(struct kvec *resv, struct xdr_netobj *o)
642 if (resv->iov_len + 4 > PAGE_SIZE)
644 svc_putnl(resv, o->len);
645 p = resv->iov_base + resv->iov_len;
646 resv->iov_len += round_up_to_quad(o->len);
647 if (resv->iov_len > PAGE_SIZE)
649 memcpy(p, o->data, o->len);
650 memset(p + o->len, 0, round_up_to_quad(o->len) - o->len);
655 * Verify the checksum on the header and return SVC_OK on success.
656 * Otherwise, return SVC_DROP (in the case of a bad sequence number)
657 * or return SVC_DENIED and indicate error in authp.
660 gss_verify_header(struct svc_rqst *rqstp, struct rsc *rsci,
661 __be32 *rpcstart, struct rpc_gss_wire_cred *gc, __be32 *authp)
663 struct gss_ctx *ctx_id = rsci->mechctx;
664 struct xdr_buf rpchdr;
665 struct xdr_netobj checksum;
667 struct kvec *argv = &rqstp->rq_arg.head[0];
670 /* data to compute the checksum over: */
671 iov.iov_base = rpcstart;
672 iov.iov_len = (u8 *)argv->iov_base - (u8 *)rpcstart;
673 xdr_buf_from_iov(&iov, &rpchdr);
675 *authp = rpc_autherr_badverf;
676 if (argv->iov_len < 4)
678 flavor = svc_getnl(argv);
679 if (flavor != RPC_AUTH_GSS)
681 if (svc_safe_getnetobj(argv, &checksum))
684 if (rqstp->rq_deferred) /* skip verification of revisited request */
686 if (gss_verify_mic(ctx_id, &rpchdr, &checksum) != GSS_S_COMPLETE) {
687 *authp = rpcsec_gsserr_credproblem;
691 if (gc->gc_seq > MAXSEQ) {
692 dprintk("RPC: svcauth_gss: discarding request with "
693 "large sequence number %d\n", gc->gc_seq);
694 *authp = rpcsec_gsserr_ctxproblem;
697 if (!gss_check_seq_num(rsci, gc->gc_seq)) {
698 dprintk("RPC: svcauth_gss: discarding request with "
699 "old sequence number %d\n", gc->gc_seq);
706 gss_write_null_verf(struct svc_rqst *rqstp)
710 svc_putnl(rqstp->rq_res.head, RPC_AUTH_NULL);
711 p = rqstp->rq_res.head->iov_base + rqstp->rq_res.head->iov_len;
712 /* don't really need to check if head->iov_len > PAGE_SIZE ... */
714 if (!xdr_ressize_check(rqstp, p))
720 gss_write_verf(struct svc_rqst *rqstp, struct gss_ctx *ctx_id, u32 seq)
724 struct xdr_buf verf_data;
725 struct xdr_netobj mic;
730 svc_putnl(rqstp->rq_res.head, RPC_AUTH_GSS);
731 xdr_seq = kmalloc(4, GFP_KERNEL);
734 *xdr_seq = htonl(seq);
736 iov.iov_base = xdr_seq;
738 xdr_buf_from_iov(&iov, &verf_data);
739 p = rqstp->rq_res.head->iov_base + rqstp->rq_res.head->iov_len;
740 mic.data = (u8 *)(p + 1);
741 maj_stat = gss_get_mic(ctx_id, &verf_data, &mic);
742 if (maj_stat != GSS_S_COMPLETE)
744 *p++ = htonl(mic.len);
745 memset((u8 *)p + mic.len, 0, round_up_to_quad(mic.len) - mic.len);
746 p += XDR_QUADLEN(mic.len);
747 if (!xdr_ressize_check(rqstp, p))
756 struct auth_domain h;
760 static struct auth_domain *
761 find_gss_auth_domain(struct gss_ctx *ctx, u32 svc)
765 name = gss_service_to_auth_domain_name(ctx->mech_type, svc);
768 return auth_domain_find(name);
771 static struct auth_ops svcauthops_gss;
773 u32 svcauth_gss_flavor(struct auth_domain *dom)
775 struct gss_domain *gd = container_of(dom, struct gss_domain, h);
777 return gd->pseudoflavor;
780 EXPORT_SYMBOL_GPL(svcauth_gss_flavor);
783 svcauth_gss_register_pseudoflavor(u32 pseudoflavor, char * name)
785 struct gss_domain *new;
786 struct auth_domain *test;
789 new = kmalloc(sizeof(*new), GFP_KERNEL);
792 kref_init(&new->h.ref);
793 new->h.name = kstrdup(name, GFP_KERNEL);
796 new->h.flavour = &svcauthops_gss;
797 new->pseudoflavor = pseudoflavor;
799 test = auth_domain_lookup(name, &new->h);
800 if (test != &new->h) {
801 pr_warn("svc: duplicate registration of gss pseudo flavour %s.\n",
804 auth_domain_put(test);
814 return ERR_PTR(stat);
816 EXPORT_SYMBOL_GPL(svcauth_gss_register_pseudoflavor);
819 read_u32_from_xdr_buf(struct xdr_buf *buf, int base, u32 *obj)
824 status = read_bytes_from_xdr_buf(buf, base, &raw, sizeof(*obj));
831 /* It would be nice if this bit of code could be shared with the client.
833 * The client shouldn't malloc(), would have to pass in own memory.
834 * The server uses base of head iovec as read pointer, while the
835 * client uses separate pointer. */
837 unwrap_integ_data(struct svc_rqst *rqstp, struct xdr_buf *buf, u32 seq, struct gss_ctx *ctx)
840 u32 integ_len, maj_stat;
841 struct xdr_netobj mic;
842 struct xdr_buf integ_buf;
844 /* NFS READ normally uses splice to send data in-place. However
845 * the data in cache can change after the reply's MIC is computed
846 * but before the RPC reply is sent. To prevent the client from
847 * rejecting the server-computed MIC in this somewhat rare case,
848 * do not use splice with the GSS integrity service.
850 clear_bit(RQ_SPLICE_OK, &rqstp->rq_flags);
852 /* Did we already verify the signature on the original pass through? */
853 if (rqstp->rq_deferred)
856 integ_len = svc_getnl(&buf->head[0]);
859 if (integ_len > buf->len)
861 if (xdr_buf_subsegment(buf, &integ_buf, 0, integ_len)) {
865 /* copy out mic... */
866 if (read_u32_from_xdr_buf(buf, integ_len, &mic.len))
868 if (mic.len > RPC_MAX_AUTH_SIZE)
870 mic.data = kmalloc(mic.len, GFP_KERNEL);
873 if (read_bytes_from_xdr_buf(buf, integ_len + 4, mic.data, mic.len))
875 maj_stat = gss_verify_mic(ctx, &integ_buf, &mic);
876 if (maj_stat != GSS_S_COMPLETE)
878 if (svc_getnl(&buf->head[0]) != seq)
880 /* trim off the mic and padding at the end before returning */
881 xdr_buf_trim(buf, round_up_to_quad(mic.len) + 4);
889 total_buf_len(struct xdr_buf *buf)
891 return buf->head[0].iov_len + buf->page_len + buf->tail[0].iov_len;
895 fix_priv_head(struct xdr_buf *buf, int pad)
897 if (buf->page_len == 0) {
898 /* We need to adjust head and buf->len in tandem in this
899 * case to make svc_defer() work--it finds the original
900 * buffer start using buf->len - buf->head[0].iov_len. */
901 buf->head[0].iov_len -= pad;
906 unwrap_priv_data(struct svc_rqst *rqstp, struct xdr_buf *buf, u32 seq, struct gss_ctx *ctx)
908 u32 priv_len, maj_stat;
909 int pad, saved_len, remaining_len, offset;
911 clear_bit(RQ_SPLICE_OK, &rqstp->rq_flags);
913 priv_len = svc_getnl(&buf->head[0]);
914 if (rqstp->rq_deferred) {
915 /* Already decrypted last time through! The sequence number
916 * check at out_seq is unnecessary but harmless: */
919 /* buf->len is the number of bytes from the original start of the
920 * request to the end, where head[0].iov_len is just the bytes
921 * not yet read from the head, so these two values are different: */
922 remaining_len = total_buf_len(buf);
923 if (priv_len > remaining_len)
925 pad = remaining_len - priv_len;
927 fix_priv_head(buf, pad);
929 /* Maybe it would be better to give gss_unwrap a length parameter: */
930 saved_len = buf->len;
932 maj_stat = gss_unwrap(ctx, 0, buf);
933 pad = priv_len - buf->len;
934 buf->len = saved_len;
936 /* The upper layers assume the buffer is aligned on 4-byte boundaries.
937 * In the krb5p case, at least, the data ends up offset, so we need to
939 /* XXX: This is very inefficient. It would be better to either do
940 * this while we encrypt, or maybe in the receive code, if we can peak
941 * ahead and work out the service and mechanism there. */
942 offset = buf->head[0].iov_len % 4;
944 buf->buflen = RPCSVC_MAXPAYLOAD;
945 xdr_shift_buf(buf, offset);
946 fix_priv_head(buf, pad);
948 if (maj_stat != GSS_S_COMPLETE)
951 if (svc_getnl(&buf->head[0]) != seq)
956 struct gss_svc_data {
957 /* decoded gss client cred: */
958 struct rpc_gss_wire_cred clcred;
959 /* save a pointer to the beginning of the encoded verifier,
960 * for use in encryption/checksumming in svcauth_gss_release: */
966 svcauth_gss_set_client(struct svc_rqst *rqstp)
968 struct gss_svc_data *svcdata = rqstp->rq_auth_data;
969 struct rsc *rsci = svcdata->rsci;
970 struct rpc_gss_wire_cred *gc = &svcdata->clcred;
974 * A gss export can be specified either by:
975 * export *(sec=krb5,rw)
977 * export gss/krb5(rw)
978 * The latter is deprecated; but for backwards compatibility reasons
979 * the nfsd code will still fall back on trying it if the former
980 * doesn't work; so we try to make both available to nfsd, below.
982 rqstp->rq_gssclient = find_gss_auth_domain(rsci->mechctx, gc->gc_svc);
983 if (rqstp->rq_gssclient == NULL)
985 stat = svcauth_unix_set_client(rqstp);
986 if (stat == SVC_DROP || stat == SVC_CLOSE)
992 gss_write_init_verf(struct cache_detail *cd, struct svc_rqst *rqstp,
993 struct xdr_netobj *out_handle, int *major_status)
998 if (*major_status != GSS_S_COMPLETE)
999 return gss_write_null_verf(rqstp);
1000 rsci = gss_svc_searchbyctx(cd, out_handle);
1002 *major_status = GSS_S_NO_CONTEXT;
1003 return gss_write_null_verf(rqstp);
1005 rc = gss_write_verf(rqstp, rsci->mechctx, GSS_SEQ_WIN);
1006 cache_put(&rsci->h, cd);
1011 gss_read_common_verf(struct rpc_gss_wire_cred *gc,
1012 struct kvec *argv, __be32 *authp,
1013 struct xdr_netobj *in_handle)
1015 /* Read the verifier; should be NULL: */
1016 *authp = rpc_autherr_badverf;
1017 if (argv->iov_len < 2 * 4)
1019 if (svc_getnl(argv) != RPC_AUTH_NULL)
1021 if (svc_getnl(argv) != 0)
1023 /* Martial context handle and token for upcall: */
1024 *authp = rpc_autherr_badcred;
1025 if (gc->gc_proc == RPC_GSS_PROC_INIT && gc->gc_ctx.len != 0)
1027 if (dup_netobj(in_handle, &gc->gc_ctx))
1029 *authp = rpc_autherr_badverf;
1035 gss_read_verf(struct rpc_gss_wire_cred *gc,
1036 struct kvec *argv, __be32 *authp,
1037 struct xdr_netobj *in_handle,
1038 struct xdr_netobj *in_token)
1040 struct xdr_netobj tmpobj;
1043 res = gss_read_common_verf(gc, argv, authp, in_handle);
1047 if (svc_safe_getnetobj(argv, &tmpobj)) {
1048 kfree(in_handle->data);
1051 if (dup_netobj(in_token, &tmpobj)) {
1052 kfree(in_handle->data);
1059 static void gss_free_in_token_pages(struct gssp_in_token *in_token)
1065 inlen = in_token->page_len;
1067 if (in_token->pages[i])
1068 put_page(in_token->pages[i]);
1069 inlen -= inlen > PAGE_SIZE ? PAGE_SIZE : inlen;
1072 kfree(in_token->pages);
1073 in_token->pages = NULL;
1076 static int gss_read_proxy_verf(struct svc_rqst *rqstp,
1077 struct rpc_gss_wire_cred *gc, __be32 *authp,
1078 struct xdr_netobj *in_handle,
1079 struct gssp_in_token *in_token)
1081 struct kvec *argv = &rqstp->rq_arg.head[0];
1082 unsigned int length, pgto_offs, pgfrom_offs;
1083 int pages, i, res, pgto, pgfrom;
1084 size_t inlen, to_offs, from_offs;
1086 res = gss_read_common_verf(gc, argv, authp, in_handle);
1090 inlen = svc_getnl(argv);
1091 if (inlen > (argv->iov_len + rqstp->rq_arg.page_len))
1094 pages = DIV_ROUND_UP(inlen, PAGE_SIZE);
1095 in_token->pages = kcalloc(pages, sizeof(struct page *), GFP_KERNEL);
1096 if (!in_token->pages)
1098 in_token->page_base = 0;
1099 in_token->page_len = inlen;
1100 for (i = 0; i < pages; i++) {
1101 in_token->pages[i] = alloc_page(GFP_KERNEL);
1102 if (!in_token->pages[i]) {
1103 gss_free_in_token_pages(in_token);
1108 length = min_t(unsigned int, inlen, argv->iov_len);
1109 memcpy(page_address(in_token->pages[0]), argv->iov_base, length);
1113 from_offs = rqstp->rq_arg.page_base;
1115 pgto = to_offs >> PAGE_SHIFT;
1116 pgfrom = from_offs >> PAGE_SHIFT;
1117 pgto_offs = to_offs & ~PAGE_MASK;
1118 pgfrom_offs = from_offs & ~PAGE_MASK;
1120 length = min_t(unsigned int, inlen,
1121 min_t(unsigned int, PAGE_SIZE - pgto_offs,
1122 PAGE_SIZE - pgfrom_offs));
1123 memcpy(page_address(in_token->pages[pgto]) + pgto_offs,
1124 page_address(rqstp->rq_arg.pages[pgfrom]) + pgfrom_offs,
1128 from_offs += length;
1135 gss_write_resv(struct kvec *resv, size_t size_limit,
1136 struct xdr_netobj *out_handle, struct xdr_netobj *out_token,
1137 int major_status, int minor_status)
1139 if (resv->iov_len + 4 > size_limit)
1141 svc_putnl(resv, RPC_SUCCESS);
1142 if (svc_safe_putnetobj(resv, out_handle))
1144 if (resv->iov_len + 3 * 4 > size_limit)
1146 svc_putnl(resv, major_status);
1147 svc_putnl(resv, minor_status);
1148 svc_putnl(resv, GSS_SEQ_WIN);
1149 if (svc_safe_putnetobj(resv, out_token))
1155 * Having read the cred already and found we're in the context
1156 * initiation case, read the verifier and initiate (or check the results
1157 * of) upcalls to userspace for help with context initiation. If
1158 * the upcall results are available, write the verifier and result.
1159 * Otherwise, drop the request pending an answer to the upcall.
1161 static int svcauth_gss_legacy_init(struct svc_rqst *rqstp,
1162 struct rpc_gss_wire_cred *gc, __be32 *authp)
1164 struct kvec *argv = &rqstp->rq_arg.head[0];
1165 struct kvec *resv = &rqstp->rq_res.head[0];
1166 struct rsi *rsip, rsikey;
1168 struct sunrpc_net *sn = net_generic(SVC_NET(rqstp), sunrpc_net_id);
1170 memset(&rsikey, 0, sizeof(rsikey));
1171 ret = gss_read_verf(gc, argv, authp,
1172 &rsikey.in_handle, &rsikey.in_token);
1176 /* Perform upcall, or find upcall result: */
1177 rsip = rsi_lookup(sn->rsi_cache, &rsikey);
1181 if (cache_check(sn->rsi_cache, &rsip->h, &rqstp->rq_chandle) < 0)
1182 /* No upcall result: */
1186 /* Got an answer to the upcall; use it: */
1187 if (gss_write_init_verf(sn->rsc_cache, rqstp,
1188 &rsip->out_handle, &rsip->major_status))
1190 if (gss_write_resv(resv, PAGE_SIZE,
1191 &rsip->out_handle, &rsip->out_token,
1192 rsip->major_status, rsip->minor_status))
1197 cache_put(&rsip->h, sn->rsi_cache);
1201 static int gss_proxy_save_rsc(struct cache_detail *cd,
1202 struct gssp_upcall_data *ud,
1205 struct rsc rsci, *rscp = NULL;
1206 static atomic64_t ctxhctr;
1208 struct gss_api_mech *gm = NULL;
1210 int status = -EINVAL;
1212 memset(&rsci, 0, sizeof(rsci));
1213 /* context handle */
1215 /* the handle needs to be just a unique id,
1216 * use a static counter */
1217 ctxh = atomic64_inc_return(&ctxhctr);
1219 /* make a copy for the caller */
1222 /* make a copy for the rsc cache */
1223 if (dup_to_netobj(&rsci.handle, (char *)handle, sizeof(uint64_t)))
1225 rscp = rsc_lookup(cd, &rsci);
1230 if (!ud->found_creds) {
1231 /* userspace seem buggy, we should always get at least a
1232 * mapping to nobody */
1233 dprintk("RPC: No creds found!\n");
1236 struct timespec64 boot;
1239 rsci.cred = ud->creds;
1240 memset(&ud->creds, 0, sizeof(struct svc_cred));
1242 status = -EOPNOTSUPP;
1243 /* get mech handle from OID */
1244 gm = gss_mech_get_by_OID(&ud->mech_oid);
1247 rsci.cred.cr_gss_mech = gm;
1250 /* mech-specific data: */
1251 status = gss_import_sec_context(ud->out_handle.data,
1254 &expiry, GFP_KERNEL);
1258 getboottime64(&boot);
1259 expiry -= boot.tv_sec;
1262 rsci.h.expiry_time = expiry;
1263 rscp = rsc_update(cd, &rsci, rscp);
1268 cache_put(&rscp->h, cd);
1274 static int svcauth_gss_proxy_init(struct svc_rqst *rqstp,
1275 struct rpc_gss_wire_cred *gc, __be32 *authp)
1277 struct kvec *resv = &rqstp->rq_res.head[0];
1278 struct xdr_netobj cli_handle;
1279 struct gssp_upcall_data ud;
1283 struct net *net = SVC_NET(rqstp);
1284 struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
1286 memset(&ud, 0, sizeof(ud));
1287 ret = gss_read_proxy_verf(rqstp, gc, authp,
1288 &ud.in_handle, &ud.in_token);
1294 /* Perform synchronous upcall to gss-proxy */
1295 status = gssp_accept_sec_context_upcall(net, &ud);
1299 dprintk("RPC: svcauth_gss: gss major status = %d "
1300 "minor status = %d\n",
1301 ud.major_status, ud.minor_status);
1303 switch (ud.major_status) {
1304 case GSS_S_CONTINUE_NEEDED:
1305 cli_handle = ud.out_handle;
1307 case GSS_S_COMPLETE:
1308 status = gss_proxy_save_rsc(sn->rsc_cache, &ud, &handle);
1310 pr_info("%s: gss_proxy_save_rsc failed (%d)\n",
1314 cli_handle.data = (u8 *)&handle;
1315 cli_handle.len = sizeof(handle);
1322 /* Got an answer to the upcall; use it: */
1323 if (gss_write_init_verf(sn->rsc_cache, rqstp,
1324 &cli_handle, &ud.major_status)) {
1325 pr_info("%s: gss_write_init_verf failed\n", __func__);
1328 if (gss_write_resv(resv, PAGE_SIZE,
1329 &cli_handle, &ud.out_token,
1330 ud.major_status, ud.minor_status)) {
1331 pr_info("%s: gss_write_resv failed\n", __func__);
1337 gss_free_in_token_pages(&ud.in_token);
1338 gssp_free_upcall_data(&ud);
1343 * Try to set the sn->use_gss_proxy variable to a new value. We only allow
1344 * it to be changed if it's currently undefined (-1). If it's any other value
1345 * then return -EBUSY unless the type wouldn't have changed anyway.
1347 static int set_gss_proxy(struct net *net, int type)
1349 struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
1352 WARN_ON_ONCE(type != 0 && type != 1);
1353 ret = cmpxchg(&sn->use_gss_proxy, -1, type);
1354 if (ret != -1 && ret != type)
1359 static bool use_gss_proxy(struct net *net)
1361 struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
1363 /* If use_gss_proxy is still undefined, then try to disable it */
1364 if (sn->use_gss_proxy == -1)
1365 set_gss_proxy(net, 0);
1366 return sn->use_gss_proxy;
1369 #ifdef CONFIG_PROC_FS
1371 static ssize_t write_gssp(struct file *file, const char __user *buf,
1372 size_t count, loff_t *ppos)
1374 struct net *net = PDE_DATA(file_inode(file));
1379 if (*ppos || count > sizeof(tbuf)-1)
1381 if (copy_from_user(tbuf, buf, count))
1385 res = kstrtoul(tbuf, 0, &i);
1390 res = set_gssp_clnt(net);
1393 res = set_gss_proxy(net, 1);
1399 static ssize_t read_gssp(struct file *file, char __user *buf,
1400 size_t count, loff_t *ppos)
1402 struct net *net = PDE_DATA(file_inode(file));
1403 struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
1404 unsigned long p = *ppos;
1408 snprintf(tbuf, sizeof(tbuf), "%d\n", sn->use_gss_proxy);
1415 if (copy_to_user(buf, (void *)(tbuf+p), len))
1421 static const struct file_operations use_gss_proxy_ops = {
1422 .open = nonseekable_open,
1423 .write = write_gssp,
1427 static int create_use_gss_proxy_proc_entry(struct net *net)
1429 struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
1430 struct proc_dir_entry **p = &sn->use_gssp_proc;
1432 sn->use_gss_proxy = -1;
1433 *p = proc_create_data("use-gss-proxy", S_IFREG | 0600,
1435 &use_gss_proxy_ops, net);
1442 static void destroy_use_gss_proxy_proc_entry(struct net *net)
1444 struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
1446 if (sn->use_gssp_proc) {
1447 remove_proc_entry("use-gss-proxy", sn->proc_net_rpc);
1448 clear_gssp_clnt(sn);
1451 #else /* CONFIG_PROC_FS */
1453 static int create_use_gss_proxy_proc_entry(struct net *net)
1458 static void destroy_use_gss_proxy_proc_entry(struct net *net) {}
1460 #endif /* CONFIG_PROC_FS */
1463 * Accept an rpcsec packet.
1464 * If context establishment, punt to user space
1465 * If data exchange, verify/decrypt
1466 * If context destruction, handle here
1467 * In the context establishment and destruction case we encode
1468 * response here and return SVC_COMPLETE.
1471 svcauth_gss_accept(struct svc_rqst *rqstp, __be32 *authp)
1473 struct kvec *argv = &rqstp->rq_arg.head[0];
1474 struct kvec *resv = &rqstp->rq_res.head[0];
1476 struct gss_svc_data *svcdata = rqstp->rq_auth_data;
1477 struct rpc_gss_wire_cred *gc;
1478 struct rsc *rsci = NULL;
1480 __be32 *reject_stat = resv->iov_base + resv->iov_len;
1482 struct sunrpc_net *sn = net_generic(SVC_NET(rqstp), sunrpc_net_id);
1484 dprintk("RPC: svcauth_gss: argv->iov_len = %zd\n",
1487 *authp = rpc_autherr_badcred;
1489 svcdata = kmalloc(sizeof(*svcdata), GFP_KERNEL);
1492 rqstp->rq_auth_data = svcdata;
1493 svcdata->verf_start = NULL;
1494 svcdata->rsci = NULL;
1495 gc = &svcdata->clcred;
1497 /* start of rpc packet is 7 u32's back from here:
1498 * xid direction rpcversion prog vers proc flavour
1500 rpcstart = argv->iov_base;
1504 * version(==1), proc(0,1,2,3), seq, service (1,2,3), handle
1505 * at least 5 u32s, and is preceded by length, so that makes 6.
1508 if (argv->iov_len < 5 * 4)
1510 crlen = svc_getnl(argv);
1511 if (svc_getnl(argv) != RPC_GSS_VERSION)
1513 gc->gc_proc = svc_getnl(argv);
1514 gc->gc_seq = svc_getnl(argv);
1515 gc->gc_svc = svc_getnl(argv);
1516 if (svc_safe_getnetobj(argv, &gc->gc_ctx))
1518 if (crlen != round_up_to_quad(gc->gc_ctx.len) + 5 * 4)
1521 if ((gc->gc_proc != RPC_GSS_PROC_DATA) && (rqstp->rq_proc != 0))
1524 *authp = rpc_autherr_badverf;
1525 switch (gc->gc_proc) {
1526 case RPC_GSS_PROC_INIT:
1527 case RPC_GSS_PROC_CONTINUE_INIT:
1528 if (use_gss_proxy(SVC_NET(rqstp)))
1529 return svcauth_gss_proxy_init(rqstp, gc, authp);
1531 return svcauth_gss_legacy_init(rqstp, gc, authp);
1532 case RPC_GSS_PROC_DATA:
1533 case RPC_GSS_PROC_DESTROY:
1534 /* Look up the context, and check the verifier: */
1535 *authp = rpcsec_gsserr_credproblem;
1536 rsci = gss_svc_searchbyctx(sn->rsc_cache, &gc->gc_ctx);
1539 switch (gss_verify_header(rqstp, rsci, rpcstart, gc, authp)) {
1549 *authp = rpc_autherr_rejectedcred;
1553 /* now act upon the command: */
1554 switch (gc->gc_proc) {
1555 case RPC_GSS_PROC_DESTROY:
1556 if (gss_write_verf(rqstp, rsci->mechctx, gc->gc_seq))
1558 /* Delete the entry from the cache_list and call cache_put */
1559 sunrpc_cache_unhash(sn->rsc_cache, &rsci->h);
1560 if (resv->iov_len + 4 > PAGE_SIZE)
1562 svc_putnl(resv, RPC_SUCCESS);
1564 case RPC_GSS_PROC_DATA:
1565 *authp = rpcsec_gsserr_ctxproblem;
1566 svcdata->verf_start = resv->iov_base + resv->iov_len;
1567 if (gss_write_verf(rqstp, rsci->mechctx, gc->gc_seq))
1569 rqstp->rq_cred = rsci->cred;
1570 get_group_info(rsci->cred.cr_group_info);
1571 *authp = rpc_autherr_badcred;
1572 switch (gc->gc_svc) {
1573 case RPC_GSS_SVC_NONE:
1575 case RPC_GSS_SVC_INTEGRITY:
1576 /* placeholders for length and seq. number: */
1579 if (unwrap_integ_data(rqstp, &rqstp->rq_arg,
1580 gc->gc_seq, rsci->mechctx))
1582 rqstp->rq_auth_slack = RPC_MAX_AUTH_SIZE;
1584 case RPC_GSS_SVC_PRIVACY:
1585 /* placeholders for length and seq. number: */
1588 if (unwrap_priv_data(rqstp, &rqstp->rq_arg,
1589 gc->gc_seq, rsci->mechctx))
1591 rqstp->rq_auth_slack = RPC_MAX_AUTH_SIZE * 2;
1596 svcdata->rsci = rsci;
1597 cache_get(&rsci->h);
1598 rqstp->rq_cred.cr_flavor = gss_svc_to_pseudoflavor(
1599 rsci->mechctx->mech_type,
1609 /* Restore write pointer to its original value: */
1610 xdr_ressize_check(rqstp, reject_stat);
1620 cache_put(&rsci->h, sn->rsc_cache);
1625 svcauth_gss_prepare_to_wrap(struct xdr_buf *resbuf, struct gss_svc_data *gsd)
1630 p = gsd->verf_start;
1631 gsd->verf_start = NULL;
1633 /* If the reply stat is nonzero, don't wrap: */
1634 if (*(p-1) != rpc_success)
1636 /* Skip the verifier: */
1638 verf_len = ntohl(*p++);
1639 p += XDR_QUADLEN(verf_len);
1640 /* move accept_stat to right place: */
1641 memcpy(p, p + 2, 4);
1642 /* Also don't wrap if the accept stat is nonzero: */
1643 if (*p != rpc_success) {
1644 resbuf->head[0].iov_len -= 2 * 4;
1652 svcauth_gss_wrap_resp_integ(struct svc_rqst *rqstp)
1654 struct gss_svc_data *gsd = (struct gss_svc_data *)rqstp->rq_auth_data;
1655 struct rpc_gss_wire_cred *gc = &gsd->clcred;
1656 struct xdr_buf *resbuf = &rqstp->rq_res;
1657 struct xdr_buf integ_buf;
1658 struct xdr_netobj mic;
1661 int integ_offset, integ_len;
1664 p = svcauth_gss_prepare_to_wrap(resbuf, gsd);
1667 integ_offset = (u8 *)(p + 1) - (u8 *)resbuf->head[0].iov_base;
1668 integ_len = resbuf->len - integ_offset;
1669 BUG_ON(integ_len % 4);
1670 *p++ = htonl(integ_len);
1671 *p++ = htonl(gc->gc_seq);
1672 if (xdr_buf_subsegment(resbuf, &integ_buf, integ_offset, integ_len)) {
1676 if (resbuf->tail[0].iov_base == NULL) {
1677 if (resbuf->head[0].iov_len + RPC_MAX_AUTH_SIZE > PAGE_SIZE)
1679 resbuf->tail[0].iov_base = resbuf->head[0].iov_base
1680 + resbuf->head[0].iov_len;
1681 resbuf->tail[0].iov_len = 0;
1683 resv = &resbuf->tail[0];
1684 mic.data = (u8 *)resv->iov_base + resv->iov_len + 4;
1685 if (gss_get_mic(gsd->rsci->mechctx, &integ_buf, &mic))
1687 svc_putnl(resv, mic.len);
1688 memset(mic.data + mic.len, 0,
1689 round_up_to_quad(mic.len) - mic.len);
1690 resv->iov_len += XDR_QUADLEN(mic.len) << 2;
1691 /* not strictly required: */
1692 resbuf->len += XDR_QUADLEN(mic.len) << 2;
1693 BUG_ON(resv->iov_len > PAGE_SIZE);
1701 svcauth_gss_wrap_resp_priv(struct svc_rqst *rqstp)
1703 struct gss_svc_data *gsd = (struct gss_svc_data *)rqstp->rq_auth_data;
1704 struct rpc_gss_wire_cred *gc = &gsd->clcred;
1705 struct xdr_buf *resbuf = &rqstp->rq_res;
1706 struct page **inpages = NULL;
1711 p = svcauth_gss_prepare_to_wrap(resbuf, gsd);
1715 offset = (u8 *)p - (u8 *)resbuf->head[0].iov_base;
1716 *p++ = htonl(gc->gc_seq);
1717 inpages = resbuf->pages;
1718 /* XXX: Would be better to write some xdr helper functions for
1719 * nfs{2,3,4}xdr.c that place the data right, instead of copying: */
1722 * If there is currently tail data, make sure there is
1723 * room for the head, tail, and 2 * RPC_MAX_AUTH_SIZE in
1724 * the page, and move the current tail data such that
1725 * there is RPC_MAX_AUTH_SIZE slack space available in
1726 * both the head and tail.
1728 if (resbuf->tail[0].iov_base) {
1729 BUG_ON(resbuf->tail[0].iov_base >= resbuf->head[0].iov_base
1731 BUG_ON(resbuf->tail[0].iov_base < resbuf->head[0].iov_base);
1732 if (resbuf->tail[0].iov_len + resbuf->head[0].iov_len
1733 + 2 * RPC_MAX_AUTH_SIZE > PAGE_SIZE)
1735 memmove(resbuf->tail[0].iov_base + RPC_MAX_AUTH_SIZE,
1736 resbuf->tail[0].iov_base,
1737 resbuf->tail[0].iov_len);
1738 resbuf->tail[0].iov_base += RPC_MAX_AUTH_SIZE;
1741 * If there is no current tail data, make sure there is
1742 * room for the head data, and 2 * RPC_MAX_AUTH_SIZE in the
1743 * allotted page, and set up tail information such that there
1744 * is RPC_MAX_AUTH_SIZE slack space available in both the
1747 if (resbuf->tail[0].iov_base == NULL) {
1748 if (resbuf->head[0].iov_len + 2*RPC_MAX_AUTH_SIZE > PAGE_SIZE)
1750 resbuf->tail[0].iov_base = resbuf->head[0].iov_base
1751 + resbuf->head[0].iov_len + RPC_MAX_AUTH_SIZE;
1752 resbuf->tail[0].iov_len = 0;
1754 if (gss_wrap(gsd->rsci->mechctx, offset, resbuf, inpages))
1756 *len = htonl(resbuf->len - offset);
1757 pad = 3 - ((resbuf->len - offset - 1)&3);
1758 p = (__be32 *)(resbuf->tail[0].iov_base + resbuf->tail[0].iov_len);
1760 resbuf->tail[0].iov_len += pad;
1766 svcauth_gss_release(struct svc_rqst *rqstp)
1768 struct gss_svc_data *gsd = (struct gss_svc_data *)rqstp->rq_auth_data;
1769 struct rpc_gss_wire_cred *gc;
1770 struct xdr_buf *resbuf = &rqstp->rq_res;
1772 struct sunrpc_net *sn = net_generic(SVC_NET(rqstp), sunrpc_net_id);
1777 if (gc->gc_proc != RPC_GSS_PROC_DATA)
1779 /* Release can be called twice, but we only wrap once. */
1780 if (gsd->verf_start == NULL)
1782 /* normally not set till svc_send, but we need it here: */
1783 /* XXX: what for? Do we mess it up the moment we call svc_putu32
1785 resbuf->len = total_buf_len(resbuf);
1786 switch (gc->gc_svc) {
1787 case RPC_GSS_SVC_NONE:
1789 case RPC_GSS_SVC_INTEGRITY:
1790 stat = svcauth_gss_wrap_resp_integ(rqstp);
1794 case RPC_GSS_SVC_PRIVACY:
1795 stat = svcauth_gss_wrap_resp_priv(rqstp);
1800 * For any other gc_svc value, svcauth_gss_accept() already set
1801 * the auth_error appropriately; just fall through:
1808 if (rqstp->rq_client)
1809 auth_domain_put(rqstp->rq_client);
1810 rqstp->rq_client = NULL;
1811 if (rqstp->rq_gssclient)
1812 auth_domain_put(rqstp->rq_gssclient);
1813 rqstp->rq_gssclient = NULL;
1814 if (rqstp->rq_cred.cr_group_info)
1815 put_group_info(rqstp->rq_cred.cr_group_info);
1816 rqstp->rq_cred.cr_group_info = NULL;
1817 if (gsd && gsd->rsci) {
1818 cache_put(&gsd->rsci->h, sn->rsc_cache);
1825 svcauth_gss_domain_release(struct auth_domain *dom)
1827 struct gss_domain *gd = container_of(dom, struct gss_domain, h);
1833 static struct auth_ops svcauthops_gss = {
1834 .name = "rpcsec_gss",
1835 .owner = THIS_MODULE,
1836 .flavour = RPC_AUTH_GSS,
1837 .accept = svcauth_gss_accept,
1838 .release = svcauth_gss_release,
1839 .domain_release = svcauth_gss_domain_release,
1840 .set_client = svcauth_gss_set_client,
1843 static int rsi_cache_create_net(struct net *net)
1845 struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
1846 struct cache_detail *cd;
1849 cd = cache_create_net(&rsi_cache_template, net);
1852 err = cache_register_net(cd, net);
1854 cache_destroy_net(cd, net);
1861 static void rsi_cache_destroy_net(struct net *net)
1863 struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
1864 struct cache_detail *cd = sn->rsi_cache;
1866 sn->rsi_cache = NULL;
1868 cache_unregister_net(cd, net);
1869 cache_destroy_net(cd, net);
1872 static int rsc_cache_create_net(struct net *net)
1874 struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
1875 struct cache_detail *cd;
1878 cd = cache_create_net(&rsc_cache_template, net);
1881 err = cache_register_net(cd, net);
1883 cache_destroy_net(cd, net);
1890 static void rsc_cache_destroy_net(struct net *net)
1892 struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
1893 struct cache_detail *cd = sn->rsc_cache;
1895 sn->rsc_cache = NULL;
1897 cache_unregister_net(cd, net);
1898 cache_destroy_net(cd, net);
1902 gss_svc_init_net(struct net *net)
1906 rv = rsc_cache_create_net(net);
1909 rv = rsi_cache_create_net(net);
1912 rv = create_use_gss_proxy_proc_entry(net);
1917 rsi_cache_destroy_net(net);
1919 rsc_cache_destroy_net(net);
1924 gss_svc_shutdown_net(struct net *net)
1926 destroy_use_gss_proxy_proc_entry(net);
1927 rsi_cache_destroy_net(net);
1928 rsc_cache_destroy_net(net);
1934 return svc_auth_register(RPC_AUTH_GSS, &svcauthops_gss);
1938 gss_svc_shutdown(void)
1940 svc_auth_unregister(RPC_AUTH_GSS);