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
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
|
/*
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*
*/
#include "config.h"
#include "Connection.h"
#include "qpid/log/Statement.h"
#if HAVE_SASL
#include <sasl/sasl.h>
#endif
using namespace qpid::framing;
namespace qpid {
namespace broker {
class NullAuthenticator : public SaslAuthenticator
{
Connection& connection;
framing::AMQP_ClientProxy::Connection010 client;
public:
NullAuthenticator(Connection& connection);
~NullAuthenticator();
void getMechanisms(framing::Array& mechanisms);
void start(const std::string& mechanism, const std::string& response);
void step(const std::string&) {}
};
#if HAVE_SASL
class CyrusAuthenticator : public SaslAuthenticator
{
sasl_conn_t *sasl_conn;
Connection& connection;
framing::AMQP_ClientProxy::Connection010 client;
void processAuthenticationStep(int code, const char *challenge, unsigned int challenge_len);
public:
CyrusAuthenticator(Connection& connection);
~CyrusAuthenticator();
void init();
void getMechanisms(framing::Array& mechanisms);
void start(const std::string& mechanism, const std::string& response);
void step(const std::string& response);
};
#else
typedef NullAuthenticator CyrusAuthenticator;
#endif
std::auto_ptr<SaslAuthenticator> SaslAuthenticator::createAuthenticator(Connection& c)
{
if (c.getBroker().getOptions().auth) {
return std::auto_ptr<SaslAuthenticator>(new CyrusAuthenticator(c));
} else {
return std::auto_ptr<SaslAuthenticator>(new NullAuthenticator(c));
}
}
NullAuthenticator::NullAuthenticator(Connection& c) : connection(c), client(c.getOutput()) {}
NullAuthenticator::~NullAuthenticator() {}
void NullAuthenticator::getMechanisms(Array& mechanisms)
{
mechanisms.add(boost::shared_ptr<FieldValue>(new Str16Value("ANONYMOUS")));
}
void NullAuthenticator::start(const string& /*mechanism*/, const string& /*response*/)
{
QPID_LOG(warning, "SASL: No Authentication Performed");
// TODO: Figure out what should actually be set in this case
connection.setUserId("anonymous");
client.tune(framing::CHANNEL_MAX, connection.getFrameMax(), 0, 0);
}
#if HAVE_SASL
CyrusAuthenticator::CyrusAuthenticator(Connection& c) : sasl_conn(0), connection(c), client(c.getOutput())
{
init();
}
void CyrusAuthenticator::init()
{
int code = sasl_server_new(BROKER_SASL_NAME,
NULL, NULL, NULL, NULL, NULL, 0,
&sasl_conn);
if (SASL_OK != code) {
QPID_LOG(info, "SASL: Connection creation failed: [" << code << "] " << sasl_errdetail(sasl_conn));
// TODO: Change this to an exception signaling
// server error, when one is available
throw CommandInvalidException("Unable to perform authentication");
}
}
CyrusAuthenticator::~CyrusAuthenticator()
{
if (sasl_conn) {
sasl_dispose(&sasl_conn);
sasl_conn = 0;
}
}
void CyrusAuthenticator::getMechanisms(Array& mechanisms)
{
const char *separator = " ";
const char *list;
unsigned int list_len;
int count;
int code = sasl_listmech(sasl_conn, NULL,
"", separator, "",
&list, &list_len,
&count);
if (SASL_OK != code) {
QPID_LOG(info, "SASL: Mechanism listing failed: " << sasl_errdetail(sasl_conn));
// TODO: Change this to an exception signaling
// server error, when one is available
throw CommandInvalidException("Mechanism listing failed");
} else {
string mechanism;
unsigned int start;
unsigned int end;
QPID_LOG(info, "SASL: Mechanism list: " << list);
end = 0;
do {
start = end;
// Seek to end of next mechanism
while (end < list_len && separator[0] != list[end])
end++;
// Record the mechanism
mechanisms.add(boost::shared_ptr<FieldValue>(new Str16Value(string(list, start, end - start))));
end++;
} while (end < list_len);
}
}
void CyrusAuthenticator::start(const string& mechanism, const string& response)
{
const char *challenge;
unsigned int challenge_len;
QPID_LOG(info, "SASL: Starting authentication with mechanism: " << mechanism);
int code = sasl_server_start(sasl_conn,
mechanism.c_str(),
response.c_str(), response.length(),
&challenge, &challenge_len);
processAuthenticationStep(code, challenge, challenge_len);
}
void CyrusAuthenticator::step(const string& response)
{
const char *challenge;
unsigned int challenge_len;
int code = sasl_server_step(sasl_conn,
response.c_str(), response.length(),
&challenge, &challenge_len);
processAuthenticationStep(code, challenge, challenge_len);
}
void CyrusAuthenticator::processAuthenticationStep(int code, const char *challenge, unsigned int challenge_len)
{
if (SASL_OK == code) {
const void *uid;
code = sasl_getprop(sasl_conn, SASL_USERNAME, &uid);
if (SASL_OK != code) {
QPID_LOG(info, "SASL: Authentication succeeded, username unavailable");
// TODO: Change this to an exception signaling
// authentication failure, when one is available
throw ConnectionForcedException("Authenticated username unavailable");
}
QPID_LOG(info, "SASL: Authentication succeeded for: " << (char *)uid);
connection.setUserId((char *)uid);
client.tune(framing::CHANNEL_MAX, connection.getFrameMax(), 0, 0);
} else if (SASL_CONTINUE == code) {
string challenge_str(challenge, challenge_len);
QPID_LOG(debug, "SASL: sending challenge to client");
client.secure(challenge_str);
} else {
QPID_LOG(info, "SASL: Authentication failed: " << sasl_errdetail(sasl_conn));
// TODO: Change to more specific exceptions, when they are
// available
switch (code) {
case SASL_NOMECH:
throw ConnectionForcedException("Unsupported mechanism");
break;
case SASL_TRYAGAIN:
throw ConnectionForcedException("Transient failure, try again");
break;
default:
throw ConnectionForcedException("Authentication failed");
break;
}
}
}
#endif
}}
|
