1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
|
// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
/*
* Ceph - scalable distributed file system
*
* Copyright (C) 2004-2009 Sage Weil <sage@newdream.net>
*
* This is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2.1, as published by the Free Software
* Foundation. See file COPYING.
*
*/
#include <errno.h>
#include "CephxClientHandler.h"
#include "CephxProtocol.h"
#include "../KeyRing.h"
#include "common/config.h"
#define dout_subsys ceph_subsys_auth
#undef dout_prefix
#define dout_prefix *_dout << "cephx client: "
int CephxClientHandler::build_request(bufferlist& bl)
{
ldout(cct, 10) << "build_request" << dendl;
ldout(cct, 10) << "validate_tickets: want=" << want << " need=" << need << " have=" << have << dendl;
validate_tickets();
ldout(cct, 10) << "want=" << want << " need=" << need << " have=" << have << dendl;
CephXTicketHandler& ticket_handler = tickets.get_handler(CEPH_ENTITY_TYPE_AUTH);
if (need & CEPH_ENTITY_TYPE_AUTH) {
/* authenticate */
CephXRequestHeader header;
header.request_type = CEPHX_GET_AUTH_SESSION_KEY;
::encode(header, bl);
CryptoKey secret;
keyring->get_secret(cct->_conf->name, secret);
CephXAuthenticate req;
get_random_bytes((char *)&req.client_challenge, sizeof(req.client_challenge));
std::string error;
cephx_calc_client_server_challenge(cct, secret, server_challenge,
req.client_challenge, &req.key, error);
if (!error.empty()) {
ldout(cct, 20) << "cephx_calc_client_server_challenge error: " << error << dendl;
return -EIO;
}
req.old_ticket = ticket_handler.ticket;
if (req.old_ticket.blob.length()) {
ldout(cct, 20) << "old ticket len=" << req.old_ticket.blob.length() << dendl;
}
::encode(req, bl);
ldout(cct, 10) << "get auth session key: client_challenge " << req.client_challenge << dendl;
return 0;
}
if (need) {
/* get service tickets */
ldout(cct, 10) << "get service keys: want=" << want << " need=" << need << " have=" << have << dendl;
CephXRequestHeader header;
header.request_type = CEPHX_GET_PRINCIPAL_SESSION_KEY;
::encode(header, bl);
CephXAuthorizer *authorizer = ticket_handler.build_authorizer(global_id);
if (!authorizer)
return -EINVAL;
bl.claim_append(authorizer->bl);
delete authorizer;
CephXServiceTicketRequest req;
req.keys = need;
::encode(req, bl);
}
return 0;
}
int CephxClientHandler::handle_response(int ret, bufferlist::iterator& indata)
{
ldout(cct, 10) << "handle_response ret = " << ret << dendl;
if (ret < 0)
return ret; // hrm!
if (starting) {
CephXServerChallenge ch;
::decode(ch, indata);
server_challenge = ch.server_challenge;
ldout(cct, 10) << " got initial server challenge " << server_challenge << dendl;
starting = false;
tickets.invalidate_ticket(CEPH_ENTITY_TYPE_AUTH);
return -EAGAIN;
}
struct CephXResponseHeader header;
::decode(header, indata);
switch (header.request_type) {
case CEPHX_GET_AUTH_SESSION_KEY:
{
ldout(cct, 10) << " get_auth_session_key" << dendl;
CryptoKey secret;
keyring->get_secret(cct->_conf->name, secret);
if (!tickets.verify_service_ticket_reply(secret, indata)) {
ldout(cct, 0) << "could not verify service_ticket reply" << dendl;
return -EPERM;
}
ldout(cct, 10) << " want=" << want << " need=" << need << " have=" << have << dendl;
validate_tickets();
if (need)
ret = -EAGAIN;
else
ret = 0;
}
break;
case CEPHX_GET_PRINCIPAL_SESSION_KEY:
{
CephXTicketHandler& ticket_handler = tickets.get_handler(CEPH_ENTITY_TYPE_AUTH);
ldout(cct, 10) << " get_principal_session_key session_key " << ticket_handler.session_key << dendl;
if (!tickets.verify_service_ticket_reply(ticket_handler.session_key, indata)) {
ldout(cct, 0) << "could not verify service_ticket reply" << dendl;
return -EPERM;
}
validate_tickets();
if (!need) {
ret = 0;
}
}
break;
case CEPHX_GET_ROTATING_KEY:
{
ldout(cct, 10) << " get_rotating_key" << dendl;
if (rotating_secrets) {
RotatingSecrets secrets;
CryptoKey secret_key;
keyring->get_secret(cct->_conf->name, secret_key);
std::string error;
if (decode_decrypt(cct, secrets, secret_key, indata, error)) {
ldout(cct, 0) << "could not set rotating key: decode_decrypt failed. error:"
<< error << dendl;
error.clear();
} else {
rotating_secrets->set_secrets(secrets);
}
}
}
break;
default:
ldout(cct, 0) << " unknown request_type " << header.request_type << dendl;
assert(0);
}
return ret;
}
AuthAuthorizer *CephxClientHandler::build_authorizer(uint32_t service_id)
{
ldout(cct, 10) << "build_authorizer for service " << ceph_entity_type_name(service_id) << dendl;
return tickets.build_authorizer(service_id);
}
bool CephxClientHandler::build_rotating_request(bufferlist& bl)
{
ldout(cct, 10) << "build_rotating_request" << dendl;
CephXRequestHeader header;
header.request_type = CEPHX_GET_ROTATING_KEY;
::encode(header, bl);
return true;
}
void CephxClientHandler::validate_tickets()
{
tickets.validate_tickets(want, have, need);
}
bool CephxClientHandler::need_tickets()
{
validate_tickets();
ldout(cct, 20) << "need_tickets: want=" << want << " need=" << need << " have=" << have << dendl;
return (need != 0);
}
|
