4.14-stable review patch. If anyone has any objections, please let me know.
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commit 149cac4a50b0b4081b38b2f38de6ef71c27eaa85 upstream.
Will be used for encrypting both the initial and updated authorizers.
Signed-off-by: Ilya Dryomov idryomov@gmail.com Reviewed-by: Sage Weil sage@redhat.com Signed-off-by: Ben Hutchings ben.hutchings@codethink.co.uk Signed-off-by: Sasha Levin sashal@kernel.org --- net/ceph/auth_x.c | 49 ++++++++++++++++++++++++++++++++++------------- 1 file changed, 36 insertions(+), 13 deletions(-)
diff --git a/net/ceph/auth_x.c b/net/ceph/auth_x.c index 9cac05239346..722791f45b2a 100644 --- a/net/ceph/auth_x.c +++ b/net/ceph/auth_x.c @@ -290,6 +290,38 @@ bad: return -EINVAL; }
+/* + * Encode and encrypt the second part (ceph_x_authorize_b) of the + * authorizer. The first part (ceph_x_authorize_a) should already be + * encoded. + */ +static int encrypt_authorizer(struct ceph_x_authorizer *au) +{ + struct ceph_x_authorize_a *msg_a; + struct ceph_x_authorize_b *msg_b; + void *p, *end; + int ret; + + msg_a = au->buf->vec.iov_base; + WARN_ON(msg_a->ticket_blob.secret_id != cpu_to_le64(au->secret_id)); + p = (void *)(msg_a + 1) + le32_to_cpu(msg_a->ticket_blob.blob_len); + 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->nonce = cpu_to_le64(au->nonce); + + 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; + + return 0; +} + static void ceph_x_authorizer_cleanup(struct ceph_x_authorizer *au) { ceph_crypto_key_destroy(&au->session_key); @@ -306,7 +338,6 @@ static int ceph_x_build_authorizer(struct ceph_auth_client *ac, int maxlen; struct ceph_x_authorize_a *msg_a; struct ceph_x_authorize_b *msg_b; - void *p, *end; int ret; int ticket_blob_len = (th->ticket_blob ? th->ticket_blob->vec.iov_len : 0); @@ -350,21 +381,13 @@ static int ceph_x_build_authorizer(struct ceph_auth_client *ac, dout(" th %p secret_id %lld %lld\n", th, th->secret_id, le64_to_cpu(msg_a->ticket_blob.secret_id));
- p = msg_a + 1; - p += ticket_blob_len; - end = au->buf->vec.iov_base + au->buf->vec.iov_len; - - msg_b = p + ceph_x_encrypt_offset(); - msg_b->struct_v = 1; get_random_bytes(&au->nonce, sizeof(au->nonce)); - msg_b->nonce = cpu_to_le64(au->nonce); - ret = ceph_x_encrypt(&au->session_key, p, end - p, sizeof(*msg_b)); - if (ret < 0) + ret = encrypt_authorizer(au); + if (ret) { + pr_err("failed to encrypt authorizer: %d", ret); goto out_au; + }
- p += ret; - WARN_ON(p > end); - au->buf->vec.iov_len = p - au->buf->vec.iov_base; dout(" built authorizer nonce %llx len %d\n", au->nonce, (int)au->buf->vec.iov_len); return 0;