4.9-stable review patch. If anyone has any objections, please let me know.
------------------
From: Ilya Dryomov <idryomov@xxxxxxxxx>
commit 4eb4517ce7c9c573b6c823de403aeccb40018cfc upstream.
- replace an ad-hoc array with a struct
- rename to calc_signature() for consistency
Signed-off-by: Ilya Dryomov <idryomov@xxxxxxxxx>
Reviewed-by: Sage Weil <sage@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
net/ceph/auth_x.c | 43 ++++++++++++++++++++++++++++---------------
1 file changed, 28 insertions(+), 15 deletions(-)
--- a/net/ceph/auth_x.c
+++ b/net/ceph/auth_x.c
@@ -707,35 +707,48 @@ static void ceph_x_invalidate_authorizer
invalidate_ticket(ac, CEPH_ENTITY_TYPE_AUTH);
}
-static int calcu_signature(struct ceph_x_authorizer *au,
- struct ceph_msg *msg, __le64 *sig)
+static int calc_signature(struct ceph_x_authorizer *au, struct ceph_msg *msg,
+ __le64 *psig)
{
- int ret;
char tmp_enc[40];
- __le32 tmp[5] = {
- cpu_to_le32(16), 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),
+ struct {
+ __le32 len;
+ __le32 header_crc;
+ __le32 front_crc;
+ __le32 middle_crc;
+ __le32 data_crc;
+ } __packed sigblock;
+ int ret;
+
+ sigblock.len = cpu_to_le32(4*sizeof(u32));
+ sigblock.header_crc = msg->hdr.crc;
+ sigblock.front_crc = msg->footer.front_crc;
+ sigblock.middle_crc = msg->footer.middle_crc;
+ sigblock.data_crc = msg->footer.data_crc;
+ ret = ceph_x_encrypt(&au->session_key, &sigblock, sizeof(sigblock),
tmp_enc, sizeof(tmp_enc));
if (ret < 0)
return ret;
- *sig = *(__le64*)(tmp_enc + 4);
+
+ *psig = *(__le64 *)(tmp_enc + sizeof(u32));
return 0;
}
static int ceph_x_sign_message(struct ceph_auth_handshake *auth,
struct ceph_msg *msg)
{
+ __le64 sig;
int ret;
if (ceph_test_opt(from_msgr(msg->con->msgr), NOMSGSIGN))
return 0;
- ret = calcu_signature((struct ceph_x_authorizer *)auth->authorizer,
- msg, &msg->footer.sig);
- if (ret < 0)
+ ret = calc_signature((struct ceph_x_authorizer *)auth->authorizer,
+ msg, &sig);
+ if (ret)
return ret;
+
+ msg->footer.sig = sig;
msg->footer.flags |= CEPH_MSG_FOOTER_SIGNED;
return 0;
}
@@ -749,9 +762,9 @@ static int ceph_x_check_message_signatur
if (ceph_test_opt(from_msgr(msg->con->msgr), NOMSGSIGN))
return 0;
- ret = calcu_signature((struct ceph_x_authorizer *)auth->authorizer,
- msg, &sig_check);
- if (ret < 0)
+ ret = calc_signature((struct ceph_x_authorizer *)auth->authorizer,
+ msg, &sig_check);
+ if (ret)
return ret;
if (sig_check == msg->footer.sig)
return 0;
--
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