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
|
/**
* Copyright (C) 2022-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.
*/
#include "mongo/crypto/jws_validated_token.h"
#include "mongo/base/string_data.h"
#include "mongo/bson/bsonobjbuilder.h"
#include "mongo/bson/json.h"
#include "mongo/crypto/jws_validator.h"
#include "mongo/db/basic_types_gen.h"
#include "mongo/util/assert_util.h"
#include "mongo/util/base64.h"
namespace mongo::crypto {
namespace {
struct ParsedToken {
StringData token[3];
StringData payload;
};
// Split "header.body.signature" into {"header", "body", "signature", "header.body"}
ParsedToken parseSignedToken(StringData token) {
ParsedToken pt;
std::size_t split, pos = 0;
for (int i = 0; i < 3; ++i) {
split = token.find('.', pos);
pt.token[i] = token.substr(pos, split - pos);
pos = split + 1;
if (i == 1) {
// Payload: encoded header + '.' + encoded body
pt.payload = token.substr(0, split);
}
}
uassert(7095400, "Unknown format of token", split == std::string::npos);
return pt;
}
} // namespace
Status JWSValidatedToken::validate(JWKManager* keyMgr) const {
const auto now = Date_t::now();
// Clock times across the network may differ and `nbf` is likely to be
// at or near the issue time, so provide a reasonable skew allowance.
constexpr Seconds kNotBeforeSkewMax{60};
if (_body.getNotBefore().get_value_or(Date_t::min()) > (now + kNotBeforeSkewMax)) {
return Status{ErrorCodes::BadValue, "Token not yet valid"};
}
// Expiration we choose not to skew, as the client can be prompted to
// create a new token for reauth, and indeed would since the token expiration
// mechanism would immediately reject this token before the command dispatch
// would have an opportunity to kick in.
if (_body.getExpiration() < now) {
return Status{ErrorCodes::BadValue, "Token is expired"};
}
auto tokenSplit = parseSignedToken(_originalToken);
auto signature = base64url::decode(tokenSplit.token[2]);
auto payload = tokenSplit.payload;
auto swValidator = keyMgr->getValidator(_header.getKeyId());
if (!swValidator.isOK()) {
auto status = swValidator.getStatus();
if (status.code() == ErrorCodes::NoSuchKey) {
return Status{ErrorCodes::BadValue,
str::stream() << "Unknown JWT keyId << '" << _header.getKeyId() << "'"};
}
return status;
}
return swValidator.getValue().get()->validate(_header.getAlgorithm(), payload, signature);
}
JWSValidatedToken::JWSValidatedToken(JWKManager* keyMgr, StringData token)
: _originalToken(token.toString()) {
auto tokenSplit = parseSignedToken(token);
auto headerString = base64url::decode(tokenSplit.token[0]);
_headerBSON = fromjson(headerString);
_header = JWSHeader::parse(IDLParserContext("JWSHeader"), _headerBSON);
uassert(7095401, "Unknown type of token", !_header.getType() || _header.getType() == "JWT"_sd);
auto bodyString = base64url::decode(tokenSplit.token[1]);
_bodyBSON = fromjson(bodyString);
_body = JWT::parse(IDLParserContext("JWT"), _bodyBSON);
uassertStatusOK(validate(keyMgr));
};
StatusWith<std::string> JWSValidatedToken::extractIssuerFromCompactSerialization(
StringData token) try {
auto tokenSplit = parseSignedToken(token);
auto payload = fromjson(base64url::decode(tokenSplit.token[1]));
return JWT::parse(IDLParserContext{"JWT"}, payload).getIssuer().toString();
} catch (const DBException& ex) {
return ex.toStatus();
}
} // namespace mongo::crypto
|
