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
|
/*
* ZeroTier One - Network Virtualization Everywhere
* Copyright (C) 2011-2017 ZeroTier, Inc. https://www.zerotier.com/
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* --
*
* You can be released from the requirements of the license by purchasing
* a commercial license. Buying such a license is mandatory as soon as you
* develop commercial closed-source software that incorporates or links
* directly against ZeroTier software without disclosing the source code
* of your own application.
*/
#ifndef ZT_TAG_HPP
#define ZT_TAG_HPP
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "Constants.hpp"
#include "Credential.hpp"
#include "C25519.hpp"
#include "Address.hpp"
#include "Identity.hpp"
#include "Buffer.hpp"
namespace ZeroTier {
class RuntimeEnvironment;
/**
* A tag that can be associated with members and matched in rules
*
* Capabilities group rules, while tags group members subject to those
* rules. Tag values can be matched in rules, and tags relevant to a
* capability are presented along with it.
*
* E.g. a capability might be "can speak Samba/CIFS within your
* department." This cap might have a rule to allow TCP/137 but
* only if a given tag ID's value matches between two peers. The
* capability is what members can do, while the tag is who they are.
* Different departments might have tags with the same ID but different
* values.
*
* Unlike capabilities tags are signed only by the issuer and are never
* transferrable.
*/
class Tag : public Credential
{
public:
static inline Credential::Type credentialType() { return Credential::CREDENTIAL_TYPE_TAG; }
Tag()
{
memset(this,0,sizeof(Tag));
}
/**
* @param nwid Network ID
* @param ts Timestamp
* @param issuedTo Address to which this tag was issued
* @param id Tag ID
* @param value Tag value
*/
Tag(const uint64_t nwid,const uint64_t ts,const Address &issuedTo,const uint32_t id,const uint32_t value) :
_id(id),
_value(value),
_networkId(nwid),
_ts(ts),
_issuedTo(issuedTo),
_signedBy()
{
}
inline uint32_t id() const { return _id; }
inline const uint32_t &value() const { return _value; }
inline uint64_t networkId() const { return _networkId; }
inline uint64_t timestamp() const { return _ts; }
inline const Address &issuedTo() const { return _issuedTo; }
inline const Address &signedBy() const { return _signedBy; }
/**
* Sign this tag
*
* @param signer Signing identity, must have private key
* @return True if signature was successful
*/
inline bool sign(const Identity &signer)
{
if (signer.hasPrivate()) {
Buffer<sizeof(Tag) + 64> tmp;
_signedBy = signer.address();
this->serialize(tmp,true);
_signature = signer.sign(tmp.data(),tmp.size());
return true;
}
return false;
}
/**
* Check this tag's signature
*
* @param RR Runtime environment to allow identity lookup for signedBy
* @param tPtr Thread pointer to be handed through to any callbacks called as a result of this call
* @return 0 == OK, 1 == waiting for WHOIS, -1 == BAD signature or tag
*/
int verify(const RuntimeEnvironment *RR,void *tPtr) const;
template<unsigned int C>
inline void serialize(Buffer<C> &b,const bool forSign = false) const
{
if (forSign) b.append((uint64_t)0x7f7f7f7f7f7f7f7fULL);
b.append(_networkId);
b.append(_ts);
b.append(_id);
b.append(_value);
_issuedTo.appendTo(b);
_signedBy.appendTo(b);
if (!forSign) {
b.append((uint8_t)1); // 1 == Ed25519
b.append((uint16_t)ZT_C25519_SIGNATURE_LEN); // length of signature
b.append(_signature.data,ZT_C25519_SIGNATURE_LEN);
}
b.append((uint16_t)0); // length of additional fields, currently 0
if (forSign) b.append((uint64_t)0x7f7f7f7f7f7f7f7fULL);
}
template<unsigned int C>
inline unsigned int deserialize(const Buffer<C> &b,unsigned int startAt = 0)
{
unsigned int p = startAt;
memset(this,0,sizeof(Tag));
_networkId = b.template at<uint64_t>(p); p += 8;
_ts = b.template at<uint64_t>(p); p += 8;
_id = b.template at<uint32_t>(p); p += 4;
_value = b.template at<uint32_t>(p); p += 4;
_issuedTo.setTo(b.field(p,ZT_ADDRESS_LENGTH),ZT_ADDRESS_LENGTH); p += ZT_ADDRESS_LENGTH;
_signedBy.setTo(b.field(p,ZT_ADDRESS_LENGTH),ZT_ADDRESS_LENGTH); p += ZT_ADDRESS_LENGTH;
if (b[p++] == 1) {
if (b.template at<uint16_t>(p) != ZT_C25519_SIGNATURE_LEN)
throw ZT_EXCEPTION_INVALID_SERIALIZED_DATA_INVALID_CRYPTOGRAPHIC_TOKEN;
p += 2;
memcpy(_signature.data,b.field(p,ZT_C25519_SIGNATURE_LEN),ZT_C25519_SIGNATURE_LEN); p += ZT_C25519_SIGNATURE_LEN;
} else {
p += 2 + b.template at<uint16_t>(p);
}
p += 2 + b.template at<uint16_t>(p);
if (p > b.size())
throw ZT_EXCEPTION_INVALID_SERIALIZED_DATA_OVERFLOW;
return (p - startAt);
}
// Provides natural sort order by ID
inline bool operator<(const Tag &t) const { return (_id < t._id); }
inline bool operator==(const Tag &t) const { return (memcmp(this,&t,sizeof(Tag)) == 0); }
inline bool operator!=(const Tag &t) const { return (memcmp(this,&t,sizeof(Tag)) != 0); }
// For searching sorted arrays or lists of Tags by ID
struct IdComparePredicate
{
inline bool operator()(const Tag &a,const Tag &b) const { return (a.id() < b.id()); }
inline bool operator()(const uint32_t a,const Tag &b) const { return (a < b.id()); }
inline bool operator()(const Tag &a,const uint32_t b) const { return (a.id() < b); }
inline bool operator()(const Tag *a,const Tag *b) const { return (a->id() < b->id()); }
inline bool operator()(const Tag *a,const Tag &b) const { return (a->id() < b.id()); }
inline bool operator()(const Tag &a,const Tag *b) const { return (a.id() < b->id()); }
inline bool operator()(const uint32_t a,const Tag *b) const { return (a < b->id()); }
inline bool operator()(const Tag *a,const uint32_t b) const { return (a->id() < b); }
inline bool operator()(const uint32_t a,const uint32_t b) const { return (a < b); }
};
private:
uint32_t _id;
uint32_t _value;
uint64_t _networkId;
uint64_t _ts;
Address _issuedTo;
Address _signedBy;
C25519::Signature _signature;
};
} // namespace ZeroTier
#endif
|
