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libceph: add process_one_ticket() helper
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). Cc: stable@vger.kernel.org Signed-off-by: Ilya Dryomov <ilya.dryomov@inktank.com> Reviewed-by: Sage Weil <sage@redhat.com>
This commit is contained in:
Ilya Dryomov
parent
73c3d4812b
commit
597cda3577
@ -129,17 +129,131 @@ static void remove_ticket_handler(struct ceph_auth_client *ac,
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kfree(th);
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}
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static int process_one_ticket(struct ceph_auth_client *ac,
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struct ceph_crypto_key *secret,
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void **p, void *end,
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void *dbuf, void *ticket_buf)
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{
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struct ceph_x_info *xi = ac->private;
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int type;
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u8 tkt_struct_v, blob_struct_v;
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struct ceph_x_ticket_handler *th;
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void *dp, *dend;
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int dlen;
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char is_enc;
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struct timespec validity;
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struct ceph_crypto_key old_key;
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void *tp, *tpend;
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struct ceph_timespec new_validity;
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struct ceph_crypto_key new_session_key;
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struct ceph_buffer *new_ticket_blob;
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unsigned long new_expires, new_renew_after;
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u64 new_secret_id;
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int ret;
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ceph_decode_need(p, end, sizeof(u32) + 1, bad);
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type = ceph_decode_32(p);
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dout(" ticket type %d %s\n", type, ceph_entity_type_name(type));
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tkt_struct_v = ceph_decode_8(p);
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if (tkt_struct_v != 1)
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goto bad;
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th = get_ticket_handler(ac, type);
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if (IS_ERR(th)) {
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ret = PTR_ERR(th);
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goto out;
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}
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/* blob for me */
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dlen = ceph_x_decrypt(secret, p, end, dbuf,
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TEMP_TICKET_BUF_LEN);
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if (dlen <= 0) {
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ret = dlen;
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goto out;
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}
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dout(" decrypted %d bytes\n", dlen);
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dp = dbuf;
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dend = dp + dlen;
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tkt_struct_v = ceph_decode_8(&dp);
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if (tkt_struct_v != 1)
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goto bad;
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memcpy(&old_key, &th->session_key, sizeof(old_key));
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ret = ceph_crypto_key_decode(&new_session_key, &dp, dend);
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if (ret)
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goto out;
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ceph_decode_copy(&dp, &new_validity, sizeof(new_validity));
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ceph_decode_timespec(&validity, &new_validity);
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new_expires = get_seconds() + validity.tv_sec;
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new_renew_after = new_expires - (validity.tv_sec / 4);
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dout(" expires=%lu renew_after=%lu\n", new_expires,
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new_renew_after);
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/* ticket blob for service */
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ceph_decode_8_safe(p, end, is_enc, bad);
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tp = ticket_buf;
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if (is_enc) {
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/* encrypted */
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dout(" encrypted ticket\n");
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dlen = ceph_x_decrypt(&old_key, p, end, ticket_buf,
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TEMP_TICKET_BUF_LEN);
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if (dlen < 0) {
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ret = dlen;
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goto out;
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}
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dlen = ceph_decode_32(&tp);
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} else {
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/* unencrypted */
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ceph_decode_32_safe(p, end, dlen, bad);
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ceph_decode_need(p, end, dlen, bad);
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ceph_decode_copy(p, ticket_buf, dlen);
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}
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tpend = tp + dlen;
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dout(" ticket blob is %d bytes\n", dlen);
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ceph_decode_need(&tp, tpend, 1 + sizeof(u64), bad);
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blob_struct_v = ceph_decode_8(&tp);
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new_secret_id = ceph_decode_64(&tp);
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ret = ceph_decode_buffer(&new_ticket_blob, &tp, tpend);
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if (ret)
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goto out;
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/* all is well, update our ticket */
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ceph_crypto_key_destroy(&th->session_key);
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if (th->ticket_blob)
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ceph_buffer_put(th->ticket_blob);
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th->session_key = new_session_key;
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th->ticket_blob = new_ticket_blob;
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th->validity = new_validity;
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th->secret_id = new_secret_id;
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th->expires = new_expires;
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th->renew_after = new_renew_after;
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dout(" got ticket service %d (%s) secret_id %lld len %d\n",
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type, ceph_entity_type_name(type), th->secret_id,
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(int)th->ticket_blob->vec.iov_len);
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xi->have_keys |= th->service;
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out:
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return ret;
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bad:
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ret = -EINVAL;
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goto out;
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}
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static int ceph_x_proc_ticket_reply(struct ceph_auth_client *ac,
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struct ceph_crypto_key *secret,
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void *buf, void *end)
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{
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struct ceph_x_info *xi = ac->private;
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int num;
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void *p = buf;
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int ret;
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char *dbuf;
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char *ticket_buf;
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u8 reply_struct_v;
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u32 num;
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int ret;
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dbuf = kmalloc(TEMP_TICKET_BUF_LEN, GFP_NOFS);
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if (!dbuf)
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@ -150,112 +264,18 @@ static int ceph_x_proc_ticket_reply(struct ceph_auth_client *ac,
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if (!ticket_buf)
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goto out_dbuf;
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ceph_decode_need(&p, end, 1 + sizeof(u32), bad);
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reply_struct_v = ceph_decode_8(&p);
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ceph_decode_8_safe(&p, end, reply_struct_v, bad);
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if (reply_struct_v != 1)
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goto bad;
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num = ceph_decode_32(&p);
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return -EINVAL;
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ceph_decode_32_safe(&p, end, num, bad);
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dout("%d tickets\n", num);
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while (num--) {
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int type;
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u8 tkt_struct_v, blob_struct_v;
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struct ceph_x_ticket_handler *th;
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void *dp, *dend;
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int dlen;
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char is_enc;
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struct timespec validity;
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struct ceph_crypto_key old_key;
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void *tp, *tpend;
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struct ceph_timespec new_validity;
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struct ceph_crypto_key new_session_key;
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struct ceph_buffer *new_ticket_blob;
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unsigned long new_expires, new_renew_after;
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u64 new_secret_id;
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ceph_decode_need(&p, end, sizeof(u32) + 1, bad);
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type = ceph_decode_32(&p);
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dout(" ticket type %d %s\n", type, ceph_entity_type_name(type));
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tkt_struct_v = ceph_decode_8(&p);
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if (tkt_struct_v != 1)
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goto bad;
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th = get_ticket_handler(ac, type);
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if (IS_ERR(th)) {
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ret = PTR_ERR(th);
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goto out;
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}
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/* blob for me */
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dlen = ceph_x_decrypt(secret, &p, end, dbuf,
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TEMP_TICKET_BUF_LEN);
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if (dlen <= 0) {
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ret = dlen;
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goto out;
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}
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dout(" decrypted %d bytes\n", dlen);
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dend = dbuf + dlen;
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dp = dbuf;
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tkt_struct_v = ceph_decode_8(&dp);
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if (tkt_struct_v != 1)
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goto bad;
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memcpy(&old_key, &th->session_key, sizeof(old_key));
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ret = ceph_crypto_key_decode(&new_session_key, &dp, dend);
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ret = process_one_ticket(ac, secret, &p, end,
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dbuf, ticket_buf);
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if (ret)
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goto out;
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ceph_decode_copy(&dp, &new_validity, sizeof(new_validity));
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ceph_decode_timespec(&validity, &new_validity);
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new_expires = get_seconds() + validity.tv_sec;
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new_renew_after = new_expires - (validity.tv_sec / 4);
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dout(" expires=%lu renew_after=%lu\n", new_expires,
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new_renew_after);
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/* ticket blob for service */
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ceph_decode_8_safe(&p, end, is_enc, bad);
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tp = ticket_buf;
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if (is_enc) {
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/* encrypted */
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dout(" encrypted ticket\n");
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dlen = ceph_x_decrypt(&old_key, &p, end, ticket_buf,
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TEMP_TICKET_BUF_LEN);
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if (dlen < 0) {
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ret = dlen;
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goto out;
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}
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dlen = ceph_decode_32(&tp);
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} else {
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/* unencrypted */
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ceph_decode_32_safe(&p, end, dlen, bad);
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ceph_decode_need(&p, end, dlen, bad);
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ceph_decode_copy(&p, ticket_buf, dlen);
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}
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tpend = tp + dlen;
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dout(" ticket blob is %d bytes\n", dlen);
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ceph_decode_need(&tp, tpend, 1 + sizeof(u64), bad);
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blob_struct_v = ceph_decode_8(&tp);
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new_secret_id = ceph_decode_64(&tp);
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ret = ceph_decode_buffer(&new_ticket_blob, &tp, tpend);
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if (ret)
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goto out;
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/* all is well, update our ticket */
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ceph_crypto_key_destroy(&th->session_key);
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if (th->ticket_blob)
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ceph_buffer_put(th->ticket_blob);
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th->session_key = new_session_key;
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th->ticket_blob = new_ticket_blob;
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th->validity = new_validity;
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th->secret_id = new_secret_id;
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th->expires = new_expires;
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th->renew_after = new_renew_after;
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dout(" got ticket service %d (%s) secret_id %lld len %d\n",
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type, ceph_entity_type_name(type), th->secret_id,
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(int)th->ticket_blob->vec.iov_len);
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xi->have_keys |= th->service;
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}
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ret = 0;
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