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This is based on AES256-CTS-HMAC384-192 crypto algorithm per RFC 8009 (i.e. Kerberos 5, hence the name) with custom-defined key usage numbers. The implementation allows a given key to have/be linked to between one and three usage numbers. The existing CEPH_CRYPTO_AES remains in place and unchanged. The usage_slot parameter that needed to be added to ceph_crypt() and its wrappers is simply ignored there. Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
137 lines
3.1 KiB
C
137 lines
3.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __FS_CEPH_AUTH_X_PROTOCOL
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#define __FS_CEPH_AUTH_X_PROTOCOL
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#define CEPHX_GET_AUTH_SESSION_KEY 0x0100
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#define CEPHX_GET_PRINCIPAL_SESSION_KEY 0x0200
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#define CEPHX_GET_ROTATING_KEY 0x0400
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/* Client <-> AuthMonitor */
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/*
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* The AUTH session's connection secret: encrypted with the AUTH
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* ticket session key
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*/
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#define CEPHX_KEY_USAGE_AUTH_CONNECTION_SECRET 0x03
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/*
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* The ticket's blob for the client ("blob for me", contains the
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* session key): encrypted with the client's secret key in case of
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* the AUTH ticket and the AUTH ticket session key in case of other
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* service tickets
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*/
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#define CEPHX_KEY_USAGE_TICKET_SESSION_KEY 0x04
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/*
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* The ticket's blob for the service (ceph_x_ticket_blob): possibly
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* encrypted with the old AUTH ticket session key in case of the AUTH
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* ticket and not encrypted in case of other service tickets
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*/
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#define CEPHX_KEY_USAGE_TICKET_BLOB 0x05
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/* Client <-> Service */
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/*
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* The client's authorization request (ceph_x_authorize_b):
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* encrypted with the service ticket session key
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*/
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#define CEPHX_KEY_USAGE_AUTHORIZE 0x10
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/*
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* The service's challenge (ceph_x_authorize_challenge):
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* encrypted with the service ticket session key
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*/
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#define CEPHX_KEY_USAGE_AUTHORIZE_CHALLENGE 0x11
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/*
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* The service's final reply (ceph_x_authorize_reply + the service
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* session's connection secret): encrypted with the service ticket
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* session key
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*/
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#define CEPHX_KEY_USAGE_AUTHORIZE_REPLY 0x12
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/* common bits */
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struct ceph_x_ticket_blob {
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__u8 struct_v;
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__le64 secret_id;
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__le32 blob_len;
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char blob[];
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} __attribute__ ((packed));
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/* common request/reply headers */
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struct ceph_x_request_header {
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__le16 op;
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} __attribute__ ((packed));
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struct ceph_x_reply_header {
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__le16 op;
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__le32 result;
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} __attribute__ ((packed));
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/* authenticate handshake */
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/* initial hello (no reply header) */
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struct ceph_x_server_challenge {
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__u8 struct_v;
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__le64 server_challenge;
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} __attribute__ ((packed));
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struct ceph_x_authenticate {
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__u8 struct_v;
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__le64 client_challenge;
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__le64 key;
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/* old_ticket blob */
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/* nautilus+: other_keys */
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} __attribute__ ((packed));
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struct ceph_x_service_ticket_request {
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__u8 struct_v;
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__le32 keys;
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} __attribute__ ((packed));
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struct ceph_x_challenge_blob {
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__le64 server_challenge;
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__le64 client_challenge;
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} __attribute__ ((packed));
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/* authorize handshake */
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/*
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* The authorizer consists of two pieces:
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* a - service id, ticket blob
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* b - encrypted with session key
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*/
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struct ceph_x_authorize_a {
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__u8 struct_v;
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__le64 global_id;
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__le32 service_id;
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struct ceph_x_ticket_blob ticket_blob;
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} __attribute__ ((packed));
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struct ceph_x_authorize_b {
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__u8 struct_v;
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__le64 nonce;
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__u8 have_challenge;
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__le64 server_challenge_plus_one;
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} __attribute__ ((packed));
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struct ceph_x_authorize_challenge {
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__u8 struct_v;
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__le64 server_challenge;
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} __attribute__ ((packed));
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struct ceph_x_authorize_reply {
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__u8 struct_v;
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__le64 nonce_plus_one;
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} __attribute__ ((packed));
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/*
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* encryption bundle
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*/
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#define CEPHX_ENC_MAGIC 0xff009cad8826aa55ull
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struct ceph_x_encrypt_header {
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__u8 struct_v;
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__le64 magic;
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} __attribute__ ((packed));
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#endif
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