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
|
/*
* Copyright (c) 2017-2021 Cisco and/or its affiliates.
* Licensed 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.
*/
#pragma once
#include <hicn/transport/auth/common.h>
#include <hicn/transport/auth/policies.h>
#include <hicn/transport/core/content_object.h>
#include <hicn/transport/errors/errors.h>
#include <hicn/transport/interfaces/callbacks.h>
#include <algorithm>
extern "C" {
#include <parc/security/parc_CertificateFactory.h>
#include <parc/security/parc_InMemoryVerifier.h>
#include <parc/security/parc_Security.h>
#include <parc/security/parc_SymmetricKeySigner.h>
#include <parc/security/parc_Verifier.h>
}
namespace transport {
namespace auth {
class Verifier {
// The base class from which all verifier classes derive.
public:
// The VerificationFailedCallback will be called by the transport if a data
// packet (either a manifest or a content object) cannot be verified. The
// application decides what to do then by returning a VerificationPolicy
// object.
using VerificationFailedCallback = std::function<auth::VerificationPolicy(
const core::ContentObject &content_object, std::error_code ec)>;
// The list of VerificationPolicy that will trigger the
// VerificationFailedCallback.
static const std::vector<VerificationPolicy> DEFAULT_FAILED_POLICIES;
Verifier();
virtual ~Verifier();
// Verify a single packet and return whether or not the packet signature is
// valid.
virtual bool verifyPacket(PacketPtr packet);
// Verify a batch of packets. Return a vector with the same size as the packet
// list, element i of that vector will contain the VerificationPolicy for
// packet i.
virtual std::vector<VerificationPolicy> verifyPackets(
const std::vector<PacketPtr> &packets);
VerificationPolicy verifyPackets(PacketPtr packet) {
return verifyPackets(std::vector<PacketPtr>{packet}).front();
}
// Verify that a batch of packets are valid using a map from packet suffixes
// to hashes. A packet is considered valid if its hash correspond to the hash
// present in the map. Return a vector with the same size as the packet list,
// element i of that vector will contain the VerificationPolicy for packet i.
virtual std::vector<VerificationPolicy> verifyPackets(
const std::vector<PacketPtr> &packets,
const std::unordered_map<Suffix, HashEntry> &suffix_map);
VerificationPolicy verifyPackets(
PacketPtr packet,
const std::unordered_map<Suffix, HashEntry> &suffix_map) {
return verifyPackets(std::vector<PacketPtr>{packet}, suffix_map).front();
}
// Add a general PARC key which can be used to verify packet signatures.
void addKey(PARCKey *key);
// Set the hasher object used to compute packet hashes.
void setHasher(PARCCryptoHasher *hasher);
// Set the callback for the case packet verification fails.
void setVerificationFailedCallback(
VerificationFailedCallback verification_failed_cb,
const std::vector<VerificationPolicy> &failed_policies =
DEFAULT_FAILED_POLICIES);
// Retrieve the VerificationFailedCallback function.
void getVerificationFailedCallback(
VerificationFailedCallback **verification_failed_cb);
static size_t getSignatureSize(const PacketPtr);
protected:
PARCCryptoHasher *hasher_;
PARCVerifier *verifier_;
VerificationFailedCallback verification_failed_cb_;
std::vector<VerificationPolicy> failed_policies_;
// Internally compute a packet hash using the hasher object.
virtual CryptoHash computeHash(PacketPtr packet);
// Call VerificationFailedCallback if it is set and update the packet policy.
void callVerificationFailedCallback(PacketPtr packet,
VerificationPolicy &policy);
};
class VoidVerifier : public Verifier {
// This class is the default socket verifier. It ignores completely the packet
// signature and always returns true.
public:
bool verifyPacket(PacketPtr packet) override;
std::vector<VerificationPolicy> verifyPackets(
const std::vector<PacketPtr> &packets) override;
std::vector<VerificationPolicy> verifyPackets(
const std::vector<PacketPtr> &packets,
const std::unordered_map<Suffix, HashEntry> &suffix_map) override;
};
class AsymmetricVerifier : public Verifier {
// This class uses asymmetric verification to validate packets. The public key
// can be set directly or extracted from a certificate.
public:
AsymmetricVerifier() = default;
// Add a public key to the verifier.
AsymmetricVerifier(PARCKey *pub_key);
// Construct an AsymmetricVerifier from a certificate file.
AsymmetricVerifier(const std::string &cert_path);
// Extract the public key of a certificate file.
void setCertificate(const std::string &cert_path);
};
class SymmetricVerifier : public Verifier {
// This class uses symmetric verification to validate packets. The symmetric
// key is derived from a passphrase.
public:
SymmetricVerifier() = default;
// Construct a SymmetricVerifier from a passphrase.
SymmetricVerifier(const std::string &passphrase);
~SymmetricVerifier();
// Create and set a symmetric key from a passphrase.
void setPassphrase(const std::string &passphrase);
// Construct a signer object. Passphrase must be set beforehand.
void setSigner(const PARCCryptoSuite &suite);
virtual std::vector<VerificationPolicy> verifyPackets(
const std::vector<PacketPtr> &packets) override;
protected:
PARCBuffer *passphrase_;
PARCSigner *signer_;
};
} // namespace auth
} // namespace transport
|
