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
|
/**
* Copyright (C) 2018-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the Server Side Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#pragma once
#include <functional>
#include <memory>
#include <string>
#include "mongo/base/status_with.h"
#include "mongo/base/string_data.h"
#include "mongo/bson/bsonobj.h"
#include "mongo/client/internal_auth.h"
#include "mongo/client/mongo_uri.h"
#include "mongo/client/sasl_client_session.h"
#include "mongo/db/auth/user_name.h"
#include "mongo/executor/remote_command_response.h"
#include "mongo/rpc/op_msg.h"
#include "mongo/util/future.h"
#include "mongo/util/md5.h"
#include "mongo/util/net/hostandport.h"
namespace mongo {
class BSONObj;
namespace auth {
using RunCommandHook = std::function<Future<BSONObj>(OpMsgRequest request)>;
/* Hook for legacy MONGODB-CR support provided by shell client only */
using AuthMongoCRHandler = std::function<Future<void>(RunCommandHook, const BSONObj&)>;
extern AuthMongoCRHandler authMongoCR;
/**
* Names for supported authentication mechanisms.
*/
constexpr auto kMechanismMongoCR = "MONGODB-CR"_sd;
constexpr auto kMechanismMongoX509 = "MONGODB-X509"_sd;
constexpr auto kMechanismSaslPlain = "PLAIN"_sd;
constexpr auto kMechanismGSSAPI = "GSSAPI"_sd;
constexpr auto kMechanismScramSha1 = "SCRAM-SHA-1"_sd;
constexpr auto kMechanismScramSha256 = "SCRAM-SHA-256"_sd;
constexpr auto kMechanismMongoAWS = "MONGODB-AWS"_sd;
constexpr auto kInternalAuthFallbackMechanism = kMechanismScramSha1;
constexpr auto kSaslSupportedMechanisms = "saslSupportedMechs"_sd;
constexpr auto kSpeculativeAuthenticate = "speculativeAuthenticate"_sd;
constexpr auto kClusterAuthenticate = "clusterAuthenticate"_sd;
constexpr auto kAuthenticateCommand = "authenticate"_sd;
/**
* On replication step down, should the current connection be killed or left open.
*/
enum class StepDownBehavior { kKillConnection, kKeepConnectionOpen };
/**
* Provider of SASL credentials for internal authentication purposes.
*/
class InternalAuthParametersProvider {
public:
virtual ~InternalAuthParametersProvider() = default;
/**
* Get the information for a given SASL mechanism.
*
* If there are multiple entries for a mechanism, suppots retrieval by index. Used when rotating
* the security key.
*/
virtual BSONObj get(size_t index, StringData mechanism) = 0;
};
std::shared_ptr<InternalAuthParametersProvider> createDefaultInternalAuthProvider();
/**
* Authenticate a user.
*
* Pass the default hostname for this client in through "hostname." If SSL is enabled and
* there is a stored client subject name, pass that through the "clientSubjectName" parameter.
* Otherwise, "clientSubjectName" will be silently ignored, pass in any string.
*
* The "params" BSONObj should be initialized with some of the fields below. Which fields
* are required depends on the mechanism, which is mandatory.
*
* "mechanism": The std::string name of the sasl mechanism to use. Mandatory.
* "user": The std::string name of the user to authenticate. Mandatory.
* "db": The database target of the auth command, which identifies the location
* of the credential information for the user. May be "$external" if
* credential information is stored outside of the mongo cluster. Mandatory.
* "pwd": The password data.
* "digestPassword": Boolean, set to true if the "pwd" is undigested (default).
* "serviceName": The GSSAPI service name to use. Defaults to "mongodb".
* "serviceHostname": The GSSAPI hostname to use. Defaults to the name of the remote
* host.
*
* Other fields in "params" are silently ignored. A "params" object can be constructed
* using the buildAuthParams() method.
*
* This function will return a future that will be filled with the final result of the
* authentication command on success or a Status on error.
*/
Future<void> authenticateClient(const BSONObj& params,
const HostAndPort& hostname,
const std::string& clientSubjectName,
RunCommandHook runCommand);
/**
* Authenticate as the __system user. All parameters are the same as authenticateClient above,
* but the __system user's credentials will be filled in automatically.
*
* The "mechanismHint" parameter will force authentication with a specific mechanism
* (e.g. SCRAM-SHA-256). If it is boost::none, then an isMaster will be called to negotiate
* a SASL mechanism with the server.
*
* The "stepDownBehavior" parameter controls whether replication will kill the connection on
* stepdown.
*
* Because this may retry during cluster keyfile rollover, this may call the RunCommandHook more
* than once, but will only call the AuthCompletionHandler once.
*/
Future<void> authenticateInternalClient(
const std::string& clientSubjectName,
boost::optional<std::string> mechanismHint,
StepDownBehavior stepDownBehavior,
RunCommandHook runCommand,
std::shared_ptr<InternalAuthParametersProvider> internalParamsProvider);
/**
* Build a BSONObject representing parameters to be passed to authenticateClient(). Takes
* the following fields:
*
* @dbname: The database target of the auth command.
* @username: The std::string name of the user to authenticate.
* @passwordText: The std::string representing the user's password.
* @digestPassword: Set to true if the password is undigested.
*/
BSONObj buildAuthParams(StringData dbname,
StringData username,
StringData passwordText,
bool digestPassword);
/**
* Run an isMaster exchange to negotiate a SASL mechanism for authentication.
*/
Future<std::string> negotiateSaslMechanism(RunCommandHook runCommand,
const UserName& username,
boost::optional<std::string> mechanismHint,
StepDownBehavior stepDownBehavior);
/**
* Return the field name for the database containing credential information.
*/
StringData getSaslCommandUserDBFieldName();
/**
* Return the field name for the user to authenticate.
*/
StringData getSaslCommandUserFieldName();
/**
* Which type of speculative authentication was performed (if any).
*/
enum class SpeculativeAuthType {
kNone,
kAuthenticate,
kSaslStart,
};
/**
* Constructs a "speculativeAuthenticate" or "speculativeSaslStart"
* payload for an isMaster request based on a given URI.
*/
SpeculativeAuthType speculateAuth(BSONObjBuilder* isMasterRequest,
const MongoURI& uri,
std::shared_ptr<SaslClientSession>* saslClientSession);
/**
* Constructs a "speculativeAuthenticate" or "speculativeSaslStart"
* payload for an isMaster request using internal (intracluster) authentication.
*/
SpeculativeAuthType speculateInternalAuth(BSONObjBuilder* isMasterRequest,
std::shared_ptr<SaslClientSession>* saslClientSession);
} // namespace auth
} // namespace mongo
|
