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-rw-r--r--fs/ceph/mds_client.c11
-rw-r--r--include/linux/ceph/auth.h8
-rw-r--r--include/linux/ceph/messenger.h3
-rw-r--r--include/linux/ceph/msgr.h2
-rw-r--r--net/ceph/auth.c16
-rw-r--r--net/ceph/auth_x.c72
-rw-r--r--net/ceph/auth_x_protocol.h7
-rw-r--r--net/ceph/messenger.c17
-rw-r--r--net/ceph/osd_client.c11
9 files changed, 140 insertions, 7 deletions
diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c
index f5a299daae95..4fc7582233db 100644
--- a/fs/ceph/mds_client.c
+++ b/fs/ceph/mds_client.c
@@ -4154,6 +4154,16 @@ static struct ceph_auth_handshake *get_authorizer(struct ceph_connection *con,
return auth;
}
+static int add_authorizer_challenge(struct ceph_connection *con,
+ void *challenge_buf, int challenge_buf_len)
+{
+ struct ceph_mds_session *s = con->private;
+ struct ceph_mds_client *mdsc = s->s_mdsc;
+ struct ceph_auth_client *ac = mdsc->fsc->client->monc.auth;
+
+ return ceph_auth_add_authorizer_challenge(ac, s->s_auth.authorizer,
+ challenge_buf, challenge_buf_len);
+}
static int verify_authorizer_reply(struct ceph_connection *con)
{
@@ -4217,6 +4227,7 @@ static const struct ceph_connection_operations mds_con_ops = {
.put = con_put,
.dispatch = dispatch,
.get_authorizer = get_authorizer,
+ .add_authorizer_challenge = add_authorizer_challenge,
.verify_authorizer_reply = verify_authorizer_reply,
.invalidate_authorizer = invalidate_authorizer,
.peer_reset = peer_reset,
diff --git a/include/linux/ceph/auth.h b/include/linux/ceph/auth.h
index e931da8424a4..6728c2ee0205 100644
--- a/include/linux/ceph/auth.h
+++ b/include/linux/ceph/auth.h
@@ -64,6 +64,10 @@ struct ceph_auth_client_ops {
/* ensure that an existing authorizer is up to date */
int (*update_authorizer)(struct ceph_auth_client *ac, int peer_type,
struct ceph_auth_handshake *auth);
+ int (*add_authorizer_challenge)(struct ceph_auth_client *ac,
+ struct ceph_authorizer *a,
+ void *challenge_buf,
+ int challenge_buf_len);
int (*verify_authorizer_reply)(struct ceph_auth_client *ac,
struct ceph_authorizer *a);
void (*invalidate_authorizer)(struct ceph_auth_client *ac,
@@ -118,6 +122,10 @@ void ceph_auth_destroy_authorizer(struct ceph_authorizer *a);
extern int ceph_auth_update_authorizer(struct ceph_auth_client *ac,
int peer_type,
struct ceph_auth_handshake *a);
+int ceph_auth_add_authorizer_challenge(struct ceph_auth_client *ac,
+ struct ceph_authorizer *a,
+ void *challenge_buf,
+ int challenge_buf_len);
extern int ceph_auth_verify_authorizer_reply(struct ceph_auth_client *ac,
struct ceph_authorizer *a);
extern void ceph_auth_invalidate_authorizer(struct ceph_auth_client *ac,
diff --git a/include/linux/ceph/messenger.h b/include/linux/ceph/messenger.h
index 021718570b50..fc2b4491ee0a 100644
--- a/include/linux/ceph/messenger.h
+++ b/include/linux/ceph/messenger.h
@@ -31,6 +31,9 @@ struct ceph_connection_operations {
struct ceph_auth_handshake *(*get_authorizer) (
struct ceph_connection *con,
int *proto, int force_new);
+ int (*add_authorizer_challenge)(struct ceph_connection *con,
+ void *challenge_buf,
+ int challenge_buf_len);
int (*verify_authorizer_reply) (struct ceph_connection *con);
int (*invalidate_authorizer)(struct ceph_connection *con);
diff --git a/include/linux/ceph/msgr.h b/include/linux/ceph/msgr.h
index 73ae2a926548..9e50aede46c8 100644
--- a/include/linux/ceph/msgr.h
+++ b/include/linux/ceph/msgr.h
@@ -91,7 +91,7 @@ struct ceph_entity_inst {
#define CEPH_MSGR_TAG_SEQ 13 /* 64-bit int follows with seen seq number */
#define CEPH_MSGR_TAG_KEEPALIVE2 14 /* keepalive2 byte + ceph_timespec */
#define CEPH_MSGR_TAG_KEEPALIVE2_ACK 15 /* keepalive2 reply */
-
+#define CEPH_MSGR_TAG_CHALLENGE_AUTHORIZER 16 /* cephx v2 doing server challenge */
/*
* connection negotiation
diff --git a/net/ceph/auth.c b/net/ceph/auth.c
index dbde2b3c3c15..fbeee068ea14 100644
--- a/net/ceph/auth.c
+++ b/net/ceph/auth.c
@@ -315,6 +315,22 @@ int ceph_auth_update_authorizer(struct ceph_auth_client *ac,
}
EXPORT_SYMBOL(ceph_auth_update_authorizer);
+int ceph_auth_add_authorizer_challenge(struct ceph_auth_client *ac,
+ struct ceph_authorizer *a,
+ void *challenge_buf,
+ int challenge_buf_len)
+{
+ int ret = 0;
+
+ mutex_lock(&ac->mutex);
+ if (ac->ops && ac->ops->add_authorizer_challenge)
+ ret = ac->ops->add_authorizer_challenge(ac, a, challenge_buf,
+ challenge_buf_len);
+ mutex_unlock(&ac->mutex);
+ return ret;
+}
+EXPORT_SYMBOL(ceph_auth_add_authorizer_challenge);
+
int ceph_auth_verify_authorizer_reply(struct ceph_auth_client *ac,
struct ceph_authorizer *a)
{
diff --git a/net/ceph/auth_x.c b/net/ceph/auth_x.c
index 61cccb93f653..512eed4291fe 100644
--- a/net/ceph/auth_x.c
+++ b/net/ceph/auth_x.c
@@ -295,7 +295,8 @@ bad:
* authorizer. The first part (ceph_x_authorize_a) should already be
* encoded.
*/
-static int encrypt_authorizer(struct ceph_x_authorizer *au)
+static int encrypt_authorizer(struct ceph_x_authorizer *au,
+ u64 *server_challenge)
{
struct ceph_x_authorize_a *msg_a;
struct ceph_x_authorize_b *msg_b;
@@ -308,16 +309,28 @@ static int encrypt_authorizer(struct ceph_x_authorizer *au)
end = au->buf->vec.iov_base + au->buf->vec.iov_len;
msg_b = p + ceph_x_encrypt_offset();
- msg_b->struct_v = 1;
+ msg_b->struct_v = 2;
msg_b->nonce = cpu_to_le64(au->nonce);
+ if (server_challenge) {
+ msg_b->have_challenge = 1;
+ msg_b->server_challenge_plus_one =
+ cpu_to_le64(*server_challenge + 1);
+ } else {
+ msg_b->have_challenge = 0;
+ msg_b->server_challenge_plus_one = 0;
+ }
ret = ceph_x_encrypt(&au->session_key, p, end - p, sizeof(*msg_b));
if (ret < 0)
return ret;
p += ret;
- WARN_ON(p > end);
- au->buf->vec.iov_len = p - au->buf->vec.iov_base;
+ if (server_challenge) {
+ WARN_ON(p != end);
+ } else {
+ WARN_ON(p > end);
+ au->buf->vec.iov_len = p - au->buf->vec.iov_base;
+ }
return 0;
}
@@ -382,7 +395,7 @@ static int ceph_x_build_authorizer(struct ceph_auth_client *ac,
le64_to_cpu(msg_a->ticket_blob.secret_id));
get_random_bytes(&au->nonce, sizeof(au->nonce));
- ret = encrypt_authorizer(au);
+ ret = encrypt_authorizer(au, NULL);
if (ret) {
pr_err("failed to encrypt authorizer: %d", ret);
goto out_au;
@@ -664,6 +677,54 @@ static int ceph_x_update_authorizer(
return 0;
}
+static int decrypt_authorize_challenge(struct ceph_x_authorizer *au,
+ void *challenge_buf,
+ int challenge_buf_len,
+ u64 *server_challenge)
+{
+ struct ceph_x_authorize_challenge *ch =
+ challenge_buf + sizeof(struct ceph_x_encrypt_header);
+ int ret;
+
+ /* no leading len */
+ ret = __ceph_x_decrypt(&au->session_key, challenge_buf,
+ challenge_buf_len);
+ if (ret < 0)
+ return ret;
+ if (ret < sizeof(*ch)) {
+ pr_err("bad size %d for ceph_x_authorize_challenge\n", ret);
+ return -EINVAL;
+ }
+
+ *server_challenge = le64_to_cpu(ch->server_challenge);
+ return 0;
+}
+
+static int ceph_x_add_authorizer_challenge(struct ceph_auth_client *ac,
+ struct ceph_authorizer *a,
+ void *challenge_buf,
+ int challenge_buf_len)
+{
+ struct ceph_x_authorizer *au = (void *)a;
+ u64 server_challenge;
+ int ret;
+
+ ret = decrypt_authorize_challenge(au, challenge_buf, challenge_buf_len,
+ &server_challenge);
+ if (ret) {
+ pr_err("failed to decrypt authorize challenge: %d", ret);
+ return ret;
+ }
+
+ ret = encrypt_authorizer(au, &server_challenge);
+ if (ret) {
+ pr_err("failed to encrypt authorizer w/ challenge: %d", ret);
+ return ret;
+ }
+
+ return 0;
+}
+
static int ceph_x_verify_authorizer_reply(struct ceph_auth_client *ac,
struct ceph_authorizer *a)
{
@@ -816,6 +877,7 @@ static const struct ceph_auth_client_ops ceph_x_ops = {
.handle_reply = ceph_x_handle_reply,
.create_authorizer = ceph_x_create_authorizer,
.update_authorizer = ceph_x_update_authorizer,
+ .add_authorizer_challenge = ceph_x_add_authorizer_challenge,
.verify_authorizer_reply = ceph_x_verify_authorizer_reply,
.invalidate_authorizer = ceph_x_invalidate_authorizer,
.reset = ceph_x_reset,
diff --git a/net/ceph/auth_x_protocol.h b/net/ceph/auth_x_protocol.h
index 32c13d763b9a..24b0b74564d0 100644
--- a/net/ceph/auth_x_protocol.h
+++ b/net/ceph/auth_x_protocol.h
@@ -70,6 +70,13 @@ struct ceph_x_authorize_a {
struct ceph_x_authorize_b {
__u8 struct_v;
__le64 nonce;
+ __u8 have_challenge;
+ __le64 server_challenge_plus_one;
+} __attribute__ ((packed));
+
+struct ceph_x_authorize_challenge {
+ __u8 struct_v;
+ __le64 server_challenge;
} __attribute__ ((packed));
struct ceph_x_authorize_reply {
diff --git a/net/ceph/messenger.c b/net/ceph/messenger.c
index 500cc3da586f..e915c8bce117 100644
--- a/net/ceph/messenger.c
+++ b/net/ceph/messenger.c
@@ -2080,9 +2080,24 @@ static int process_connect(struct ceph_connection *con)
if (con->auth) {
/*
* Any connection that defines ->get_authorizer()
- * should also define ->verify_authorizer_reply().
+ * should also define ->add_authorizer_challenge() and
+ * ->verify_authorizer_reply().
+ *
* See get_connect_authorizer().
*/
+ if (con->in_reply.tag == CEPH_MSGR_TAG_CHALLENGE_AUTHORIZER) {
+ ret = con->ops->add_authorizer_challenge(
+ con, con->auth->authorizer_reply_buf,
+ le32_to_cpu(con->in_reply.authorizer_len));
+ if (ret < 0)
+ return ret;
+
+ con_out_kvec_reset(con);
+ __prepare_write_connect(con);
+ prepare_read_connect(con);
+ return 0;
+ }
+
ret = con->ops->verify_authorizer_reply(con);
if (ret < 0) {
con->error_msg = "bad authorize reply";
diff --git a/net/ceph/osd_client.c b/net/ceph/osd_client.c
index 8002b8e9ce24..60934bd8796c 100644
--- a/net/ceph/osd_client.c
+++ b/net/ceph/osd_client.c
@@ -5393,6 +5393,16 @@ static struct ceph_auth_handshake *get_authorizer(struct ceph_connection *con,
return auth;
}
+static int add_authorizer_challenge(struct ceph_connection *con,
+ void *challenge_buf, int challenge_buf_len)
+{
+ struct ceph_osd *o = con->private;
+ struct ceph_osd_client *osdc = o->o_osdc;
+ struct ceph_auth_client *ac = osdc->client->monc.auth;
+
+ return ceph_auth_add_authorizer_challenge(ac, o->o_auth.authorizer,
+ challenge_buf, challenge_buf_len);
+}
static int verify_authorizer_reply(struct ceph_connection *con)
{
@@ -5442,6 +5452,7 @@ static const struct ceph_connection_operations osd_con_ops = {
.put = put_osd_con,
.dispatch = dispatch,
.get_authorizer = get_authorizer,
+ .add_authorizer_challenge = add_authorizer_challenge,
.verify_authorizer_reply = verify_authorizer_reply,
.invalidate_authorizer = invalidate_authorizer,
.alloc_msg = alloc_msg,
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