[PATCH 3.13 008/103] libceph: add process_one_ticket() helper
Kamal Mostafa
kamal at canonical.com
Tue Sep 30 21:30:13 UTC 2014
3.13.11.8 -stable review patch. If anyone has any objections, please let me know.
------------------
From: Ilya Dryomov <ilya.dryomov at inktank.com>
commit 597cda357716a3cf8d994cb11927af917c8d71fa upstream.
Add a helper for processing individual cephx auth tickets. Needed for
the next commit, which deals with allocating ticket buffers. (Most of
the diff here is whitespace - view with git diff -b).
Signed-off-by: Ilya Dryomov <ilya.dryomov at inktank.com>
Reviewed-by: Sage Weil <sage at redhat.com>
[ kamal: 3.13 stable prereq for
c27a3e4 "libceph: do not hard code max auth ticket len" ]
Signed-off-by: Kamal Mostafa <kamal at canonical.com>
---
net/ceph/auth_x.c | 228 +++++++++++++++++++++++++++++-------------------------
1 file changed, 124 insertions(+), 104 deletions(-)
diff --git a/net/ceph/auth_x.c b/net/ceph/auth_x.c
index 96238ba..0eb146d 100644
--- a/net/ceph/auth_x.c
+++ b/net/ceph/auth_x.c
@@ -129,17 +129,131 @@ static void remove_ticket_handler(struct ceph_auth_client *ac,
kfree(th);
}
+static int process_one_ticket(struct ceph_auth_client *ac,
+ struct ceph_crypto_key *secret,
+ void **p, void *end,
+ void *dbuf, void *ticket_buf)
+{
+ struct ceph_x_info *xi = ac->private;
+ int type;
+ u8 tkt_struct_v, blob_struct_v;
+ struct ceph_x_ticket_handler *th;
+ void *dp, *dend;
+ int dlen;
+ char is_enc;
+ struct timespec validity;
+ struct ceph_crypto_key old_key;
+ void *tp, *tpend;
+ struct ceph_timespec new_validity;
+ struct ceph_crypto_key new_session_key;
+ struct ceph_buffer *new_ticket_blob;
+ unsigned long new_expires, new_renew_after;
+ u64 new_secret_id;
+ int ret;
+
+ ceph_decode_need(p, end, sizeof(u32) + 1, bad);
+
+ type = ceph_decode_32(p);
+ dout(" ticket type %d %s\n", type, ceph_entity_type_name(type));
+
+ tkt_struct_v = ceph_decode_8(p);
+ if (tkt_struct_v != 1)
+ goto bad;
+
+ th = get_ticket_handler(ac, type);
+ if (IS_ERR(th)) {
+ ret = PTR_ERR(th);
+ goto out;
+ }
+
+ /* blob for me */
+ dlen = ceph_x_decrypt(secret, p, end, dbuf,
+ TEMP_TICKET_BUF_LEN);
+ if (dlen <= 0) {
+ ret = dlen;
+ goto out;
+ }
+ dout(" decrypted %d bytes\n", dlen);
+ dp = dbuf;
+ dend = dp + dlen;
+
+ tkt_struct_v = ceph_decode_8(&dp);
+ if (tkt_struct_v != 1)
+ goto bad;
+
+ memcpy(&old_key, &th->session_key, sizeof(old_key));
+ ret = ceph_crypto_key_decode(&new_session_key, &dp, dend);
+ if (ret)
+ goto out;
+
+ ceph_decode_copy(&dp, &new_validity, sizeof(new_validity));
+ ceph_decode_timespec(&validity, &new_validity);
+ new_expires = get_seconds() + validity.tv_sec;
+ new_renew_after = new_expires - (validity.tv_sec / 4);
+ dout(" expires=%lu renew_after=%lu\n", new_expires,
+ new_renew_after);
+
+ /* ticket blob for service */
+ ceph_decode_8_safe(p, end, is_enc, bad);
+ tp = ticket_buf;
+ if (is_enc) {
+ /* encrypted */
+ dout(" encrypted ticket\n");
+ dlen = ceph_x_decrypt(&old_key, p, end, ticket_buf,
+ TEMP_TICKET_BUF_LEN);
+ if (dlen < 0) {
+ ret = dlen;
+ goto out;
+ }
+ dlen = ceph_decode_32(&tp);
+ } else {
+ /* unencrypted */
+ ceph_decode_32_safe(p, end, dlen, bad);
+ ceph_decode_need(p, end, dlen, bad);
+ ceph_decode_copy(p, ticket_buf, dlen);
+ }
+ tpend = tp + dlen;
+ dout(" ticket blob is %d bytes\n", dlen);
+ ceph_decode_need(&tp, tpend, 1 + sizeof(u64), bad);
+ blob_struct_v = ceph_decode_8(&tp);
+ new_secret_id = ceph_decode_64(&tp);
+ ret = ceph_decode_buffer(&new_ticket_blob, &tp, tpend);
+ if (ret)
+ goto out;
+
+ /* all is well, update our ticket */
+ ceph_crypto_key_destroy(&th->session_key);
+ if (th->ticket_blob)
+ ceph_buffer_put(th->ticket_blob);
+ th->session_key = new_session_key;
+ th->ticket_blob = new_ticket_blob;
+ th->validity = new_validity;
+ th->secret_id = new_secret_id;
+ th->expires = new_expires;
+ th->renew_after = new_renew_after;
+ dout(" got ticket service %d (%s) secret_id %lld len %d\n",
+ type, ceph_entity_type_name(type), th->secret_id,
+ (int)th->ticket_blob->vec.iov_len);
+ xi->have_keys |= th->service;
+
+out:
+ return ret;
+
+bad:
+ ret = -EINVAL;
+ goto out;
+}
+
static int ceph_x_proc_ticket_reply(struct ceph_auth_client *ac,
struct ceph_crypto_key *secret,
void *buf, void *end)
{
- struct ceph_x_info *xi = ac->private;
- int num;
void *p = buf;
- int ret;
char *dbuf;
char *ticket_buf;
u8 reply_struct_v;
+ u32 num;
+ int ret;
dbuf = kmalloc(TEMP_TICKET_BUF_LEN, GFP_NOFS);
if (!dbuf)
@@ -150,112 +264,18 @@ static int ceph_x_proc_ticket_reply(struct ceph_auth_client *ac,
if (!ticket_buf)
goto out_dbuf;
- ceph_decode_need(&p, end, 1 + sizeof(u32), bad);
- reply_struct_v = ceph_decode_8(&p);
+ ceph_decode_8_safe(&p, end, reply_struct_v, bad);
if (reply_struct_v != 1)
- goto bad;
- num = ceph_decode_32(&p);
- dout("%d tickets\n", num);
- while (num--) {
- int type;
- u8 tkt_struct_v, blob_struct_v;
- struct ceph_x_ticket_handler *th;
- void *dp, *dend;
- int dlen;
- char is_enc;
- struct timespec validity;
- struct ceph_crypto_key old_key;
- void *tp, *tpend;
- struct ceph_timespec new_validity;
- struct ceph_crypto_key new_session_key;
- struct ceph_buffer *new_ticket_blob;
- unsigned long new_expires, new_renew_after;
- u64 new_secret_id;
-
- ceph_decode_need(&p, end, sizeof(u32) + 1, bad);
-
- type = ceph_decode_32(&p);
- dout(" ticket type %d %s\n", type, ceph_entity_type_name(type));
-
- tkt_struct_v = ceph_decode_8(&p);
- if (tkt_struct_v != 1)
- goto bad;
-
- th = get_ticket_handler(ac, type);
- if (IS_ERR(th)) {
- ret = PTR_ERR(th);
- goto out;
- }
-
- /* blob for me */
- dlen = ceph_x_decrypt(secret, &p, end, dbuf,
- TEMP_TICKET_BUF_LEN);
- if (dlen <= 0) {
- ret = dlen;
- goto out;
- }
- dout(" decrypted %d bytes\n", dlen);
- dend = dbuf + dlen;
- dp = dbuf;
-
- tkt_struct_v = ceph_decode_8(&dp);
- if (tkt_struct_v != 1)
- goto bad;
+ return -EINVAL;
- memcpy(&old_key, &th->session_key, sizeof(old_key));
- ret = ceph_crypto_key_decode(&new_session_key, &dp, dend);
- if (ret)
- goto out;
+ ceph_decode_32_safe(&p, end, num, bad);
+ dout("%d tickets\n", num);
- ceph_decode_copy(&dp, &new_validity, sizeof(new_validity));
- ceph_decode_timespec(&validity, &new_validity);
- new_expires = get_seconds() + validity.tv_sec;
- new_renew_after = new_expires - (validity.tv_sec / 4);
- dout(" expires=%lu renew_after=%lu\n", new_expires,
- new_renew_after);
-
- /* ticket blob for service */
- ceph_decode_8_safe(&p, end, is_enc, bad);
- tp = ticket_buf;
- if (is_enc) {
- /* encrypted */
- dout(" encrypted ticket\n");
- dlen = ceph_x_decrypt(&old_key, &p, end, ticket_buf,
- TEMP_TICKET_BUF_LEN);
- if (dlen < 0) {
- ret = dlen;
- goto out;
- }
- dlen = ceph_decode_32(&tp);
- } else {
- /* unencrypted */
- ceph_decode_32_safe(&p, end, dlen, bad);
- ceph_decode_need(&p, end, dlen, bad);
- ceph_decode_copy(&p, ticket_buf, dlen);
- }
- tpend = tp + dlen;
- dout(" ticket blob is %d bytes\n", dlen);
- ceph_decode_need(&tp, tpend, 1 + sizeof(u64), bad);
- blob_struct_v = ceph_decode_8(&tp);
- new_secret_id = ceph_decode_64(&tp);
- ret = ceph_decode_buffer(&new_ticket_blob, &tp, tpend);
+ while (num--) {
+ ret = process_one_ticket(ac, secret, &p, end,
+ dbuf, ticket_buf);
if (ret)
goto out;
-
- /* all is well, update our ticket */
- ceph_crypto_key_destroy(&th->session_key);
- if (th->ticket_blob)
- ceph_buffer_put(th->ticket_blob);
- th->session_key = new_session_key;
- th->ticket_blob = new_ticket_blob;
- th->validity = new_validity;
- th->secret_id = new_secret_id;
- th->expires = new_expires;
- th->renew_after = new_renew_after;
- dout(" got ticket service %d (%s) secret_id %lld len %d\n",
- type, ceph_entity_type_name(type), th->secret_id,
- (int)th->ticket_blob->vec.iov_len);
- xi->have_keys |= th->service;
}
ret = 0;
--
1.9.1
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