aboutsummaryrefslogtreecommitdiffstats
path: root/net/ceph
diff options
context:
space:
mode:
authorYan, Zheng <zyan@redhat.com>2014-11-04 16:33:37 +0800
committerIlya Dryomov <idryomov@redhat.com>2014-12-17 20:09:50 +0300
commit33d07337962c7bbd2fd5cf7f1106735c9507fbe2 (patch)
tree93a95e7d02db4d7ba7d282483e32fd0627a3c281 /net/ceph
parentae385eaf24dc39c1703049112e4265b9f93b7d86 (diff)
libceph: message signature support
Signed-off-by: Yan, Zheng <zyan@redhat.com>
Diffstat (limited to 'net/ceph')
-rw-r--r--net/ceph/auth_x.c58
-rw-r--r--net/ceph/messenger.c32
-rw-r--r--net/ceph/osd_client.c16
3 files changed, 103 insertions, 3 deletions
diff --git a/net/ceph/auth_x.c b/net/ceph/auth_x.c
index 77f3885c16bc..15845814a0f2 100644
--- a/net/ceph/auth_x.c
+++ b/net/ceph/auth_x.c
@@ -8,6 +8,7 @@
#include <linux/ceph/decode.h>
#include <linux/ceph/auth.h>
+#include <linux/ceph/messenger.h>
#include "crypto.h"
#include "auth_x.h"
@@ -567,6 +568,8 @@ static int ceph_x_create_authorizer(
auth->authorizer_buf_len = au->buf->vec.iov_len;
auth->authorizer_reply_buf = au->reply_buf;
auth->authorizer_reply_buf_len = sizeof (au->reply_buf);
+ auth->sign_message = ac->ops->sign_message;
+ auth->check_message_signature = ac->ops->check_message_signature;
return 0;
}
@@ -667,6 +670,59 @@ static void ceph_x_invalidate_authorizer(struct ceph_auth_client *ac,
memset(&th->validity, 0, sizeof(th->validity));
}
+static int calcu_signature(struct ceph_x_authorizer *au,
+ struct ceph_msg *msg, __le64 *sig)
+{
+ int ret;
+ char tmp_enc[40];
+ __le32 tmp[5] = {
+ 16u, msg->hdr.crc, msg->footer.front_crc,
+ msg->footer.middle_crc, msg->footer.data_crc,
+ };
+ ret = ceph_x_encrypt(&au->session_key, &tmp, sizeof(tmp),
+ tmp_enc, sizeof(tmp_enc));
+ if (ret < 0)
+ return ret;
+ *sig = *(__le64*)(tmp_enc + 4);
+ return 0;
+}
+
+static int ceph_x_sign_message(struct ceph_auth_handshake *auth,
+ struct ceph_msg *msg)
+{
+ int ret;
+ if (!auth->authorizer)
+ return 0;
+ ret = calcu_signature((struct ceph_x_authorizer *)auth->authorizer,
+ msg, &msg->footer.sig);
+ if (ret < 0)
+ return ret;
+ msg->footer.flags |= CEPH_MSG_FOOTER_SIGNED;
+ return 0;
+}
+
+static int ceph_x_check_message_signature(struct ceph_auth_handshake *auth,
+ struct ceph_msg *msg)
+{
+ __le64 sig_check;
+ int ret;
+
+ if (!auth->authorizer)
+ return 0;
+ ret = calcu_signature((struct ceph_x_authorizer *)auth->authorizer,
+ msg, &sig_check);
+ if (ret < 0)
+ return ret;
+ if (sig_check == msg->footer.sig)
+ return 0;
+ if (msg->footer.flags & CEPH_MSG_FOOTER_SIGNED)
+ dout("ceph_x_check_message_signature %p has signature %llx "
+ "expect %llx\n", msg, msg->footer.sig, sig_check);
+ else
+ dout("ceph_x_check_message_signature %p sender did not set "
+ "CEPH_MSG_FOOTER_SIGNED\n", msg);
+ return -EBADMSG;
+}
static const struct ceph_auth_client_ops ceph_x_ops = {
.name = "x",
@@ -681,6 +737,8 @@ static const struct ceph_auth_client_ops ceph_x_ops = {
.invalidate_authorizer = ceph_x_invalidate_authorizer,
.reset = ceph_x_reset,
.destroy = ceph_x_destroy,
+ .sign_message = ceph_x_sign_message,
+ .check_message_signature = ceph_x_check_message_signature,
};
diff --git a/net/ceph/messenger.c b/net/ceph/messenger.c
index 863d07ab2129..33a2f201e460 100644
--- a/net/ceph/messenger.c
+++ b/net/ceph/messenger.c
@@ -1196,8 +1196,18 @@ static void prepare_write_message_footer(struct ceph_connection *con)
dout("prepare_write_message_footer %p\n", con);
con->out_kvec_is_msg = true;
con->out_kvec[v].iov_base = &m->footer;
- con->out_kvec[v].iov_len = sizeof(m->footer);
- con->out_kvec_bytes += sizeof(m->footer);
+ if (con->peer_features & CEPH_FEATURE_MSG_AUTH) {
+ if (con->ops->sign_message)
+ con->ops->sign_message(con, m);
+ else
+ m->footer.sig = 0;
+ con->out_kvec[v].iov_len = sizeof(m->footer);
+ con->out_kvec_bytes += sizeof(m->footer);
+ } else {
+ m->old_footer.flags = m->footer.flags;
+ con->out_kvec[v].iov_len = sizeof(m->old_footer);
+ con->out_kvec_bytes += sizeof(m->old_footer);
+ }
con->out_kvec_left++;
con->out_more = m->more_to_follow;
con->out_msg_done = true;
@@ -2249,6 +2259,7 @@ static int read_partial_message(struct ceph_connection *con)
int ret;
unsigned int front_len, middle_len, data_len;
bool do_datacrc = !con->msgr->nocrc;
+ bool need_sign = (con->peer_features & CEPH_FEATURE_MSG_AUTH);
u64 seq;
u32 crc;
@@ -2361,12 +2372,21 @@ static int read_partial_message(struct ceph_connection *con)
}
/* footer */
- size = sizeof (m->footer);
+ if (need_sign)
+ size = sizeof(m->footer);
+ else
+ size = sizeof(m->old_footer);
+
end += size;
ret = read_partial(con, end, size, &m->footer);
if (ret <= 0)
return ret;
+ if (!need_sign) {
+ m->footer.flags = m->old_footer.flags;
+ m->footer.sig = 0;
+ }
+
dout("read_partial_message got msg %p %d (%u) + %d (%u) + %d (%u)\n",
m, front_len, m->footer.front_crc, middle_len,
m->footer.middle_crc, data_len, m->footer.data_crc);
@@ -2390,6 +2410,12 @@ static int read_partial_message(struct ceph_connection *con)
return -EBADMSG;
}
+ if (need_sign && con->ops->check_message_signature &&
+ con->ops->check_message_signature(con, m)) {
+ pr_err("read_partial_message %p signature check failed\n", m);
+ return -EBADMSG;
+ }
+
return 1; /* done! */
}
diff --git a/net/ceph/osd_client.c b/net/ceph/osd_client.c
index 6f164289bde8..1f6c4055adaf 100644
--- a/net/ceph/osd_client.c
+++ b/net/ceph/osd_client.c
@@ -2920,6 +2920,20 @@ static int invalidate_authorizer(struct ceph_connection *con)
return ceph_monc_validate_auth(&osdc->client->monc);
}
+static int sign_message(struct ceph_connection *con, struct ceph_msg *msg)
+{
+ struct ceph_osd *o = con->private;
+ struct ceph_auth_handshake *auth = &o->o_auth;
+ return ceph_auth_sign_message(auth, msg);
+}
+
+static int check_message_signature(struct ceph_connection *con, struct ceph_msg *msg)
+{
+ struct ceph_osd *o = con->private;
+ struct ceph_auth_handshake *auth = &o->o_auth;
+ return ceph_auth_check_message_signature(auth, msg);
+}
+
static const struct ceph_connection_operations osd_con_ops = {
.get = get_osd_con,
.put = put_osd_con,
@@ -2928,5 +2942,7 @@ static const struct ceph_connection_operations osd_con_ops = {
.verify_authorizer_reply = verify_authorizer_reply,
.invalidate_authorizer = invalidate_authorizer,
.alloc_msg = alloc_msg,
+ .sign_message = sign_message,
+ .check_message_signature = check_message_signature,
.fault = osd_reset,
};

Privacy Policy