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
|
/**
* Copyright (C) 2017 MongoDB Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* 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
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* 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 GNU Affero General 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 "mongo/base/status_with.h"
#include "mongo/bson/bsonelement.h"
#include "mongo/bson/bsonmisc.h"
#include "mongo/db/auth/restriction.h"
#include "mongo/db/auth/restriction_environment.h"
#include "mongo/db/auth/restriction_set.h"
#include "mongo/util/net/cidr.h"
#include <memory>
#include <string>
#include <vector>
namespace mongo {
namespace address_restriction_detail {
using mongo::operator""_sd;
struct ClientSource {
static constexpr auto label = "Client source "_sd;
static constexpr auto field = "clientSource"_sd;
static auto addr(const RestrictionEnvironment& environment) {
return environment.getClientSource();
}
};
struct ServerAddress {
static constexpr auto label = "Server address "_sd;
static constexpr auto const field = "serverAddress"_sd;
static auto addr(const RestrictionEnvironment& environment) {
return environment.getServerAddress();
}
};
// Represents a restriction based on client or server address
template <typename T>
class AddressRestriction : public NamedRestriction {
public:
/**
* Construct an empty AddressRestriction.
* Note that an empty AddressRestriciton will not validate
* against any addresses, since nothing has been whitelisted.
*/
AddressRestriction() = default;
/**
* Construct an AddressRestriction based on a human readable subnet spec
*/
explicit AddressRestriction(const StringData range) : _ranges({CIDR(range)}) {}
/**
* Construct an AddressRestriction based on several human readable subnet specs
*/
template <typename StringType>
explicit AddressRestriction(const std::vector<StringType>& ranges) {
for (auto const& range : ranges) {
_ranges.emplace_back(range);
}
}
/**
* Returns true if the Environment's client/server's address
* satisfies this restriction set.
*/
Status validate(const RestrictionEnvironment& environment) const override {
auto const addr = T::addr(environment);
if (!addr.isIP()) {
std::ostringstream s;
s << T::label << " is not an IP address: " << addr.getAddr();
return {ErrorCodes::AuthenticationRestrictionUnmet, s.str()};
}
const CIDR address(addr.getAddr());
for (auto const& range : _ranges) {
if (range.contains(address)) {
return Status::OK();
}
}
std::ostringstream s;
s << addr.getAddr() << " does not fall within: ";
serialize(s);
return {ErrorCodes::AuthenticationRestrictionUnmet, s.str()};
}
/**
* Append to builder an array element with the human-readable CIDR ranges.
*/
void appendToBuilder(BSONObjBuilder* builder) const override {
BSONArrayBuilder b;
for (auto const& range : _ranges) {
b.append(range.toString());
}
builder->append(T::field, b.arr());
}
friend bool operator==(const AddressRestriction<T>& lhs, const AddressRestriction<T>& rhs) {
return lhs.equalityLens() == rhs.equalityLens();
}
friend bool operator!=(const AddressRestriction<T>& lhs, const AddressRestriction<T>& rhs) {
return !(lhs == rhs);
}
private:
auto equalityLens() const {
return std::tie(_ranges);
}
void serialize(std::ostream& os) const override {
os << "{\"" << T::field << "\": [";
auto sz = _ranges.size() - 1;
for (auto const& range : _ranges) {
os << '"' << range << '"';
if (sz--) {
os << ", ";
}
}
os << "]}";
}
std::vector<CIDR> _ranges;
};
} // namespace address_restriction_detail
using ClientSourceRestriction =
address_restriction_detail::AddressRestriction<address_restriction_detail::ClientSource>;
using ServerAddressRestriction =
address_restriction_detail::AddressRestriction<address_restriction_detail::ServerAddress>;
/**
* Parse a set of clientSource, serverAddress, or both
* and return a RestrictionSet on success.
*/
StatusWith<RestrictionSet<>> parseAddressRestrictionSet(const BSONObj& obj);
/**
* Parse a BSON representation of an array of RestrictionSet<AddressRestriction<T>>s
* and return a SharedRestrictionDocument on success.
*/
StatusWith<SharedRestrictionDocument> parseAuthenticationRestriction(const BSONArray& arr);
/**
* Parse and validate a BSONArray containing AuthenticationRestrictions
* and return a new BSONArray representing a sanitized portion thereof.
*/
StatusWith<BSONArray> getRawAuthenticationRestrictions(const BSONArray& arr) noexcept;
template <>
inline BSONObjBuilder& BSONObjBuilderValueStream::operator<<<ClientSourceRestriction>(
ClientSourceRestriction value) {
BSONObjBuilder b;
value.appendToBuilder(&b);
_builder->append(_fieldName, b.obj());
_fieldName = StringData();
return *_builder;
}
template <>
inline BSONObjBuilder& BSONObjBuilderValueStream::operator<<<ServerAddressRestriction>(
ServerAddressRestriction value) {
BSONObjBuilder b;
value.appendToBuilder(&b);
_builder->append(_fieldName, b.obj());
_fieldName = StringData();
return *_builder;
}
} // namespace mongo
|
