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
|
/*
* ngtcp2
*
* Copyright (c) 2019 ngtcp2 contributors
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#ifndef NGTCP2_SHARED_H
#define NGTCP2_SHARED_H
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif /* HAVE_CONFIG_H */
#include <ngtcp2/ngtcp2_crypto.h>
/* Maximum key usage (encryption) limits */
#define NGTCP2_CRYPTO_MAX_ENCRYPTION_AES_GCM (23726566ULL)
#define NGTCP2_CRYPTO_MAX_ENCRYPTION_CHACHA20_POLY1305 (1ULL << 62)
#define NGTCP2_CRYPTO_MAX_ENCRYPTION_AES_CCM (1ULL << 23)
/* Maximum authentication failure (decryption) limits */
#define NGTCP2_CRYPTO_MAX_DECRYPTION_FAILURE_AES_GCM (1ULL << 36)
#define NGTCP2_CRYPTO_MAX_DECRYPTION_FAILURE_CHACHA20_POLY1305 (1ULL << 36)
#define NGTCP2_CRYPTO_MAX_DECRYPTION_FAILURE_AES_CCM (11863283ULL)
/**
* @function
*
* `ngtcp2_crypto_derive_initial_secrets` derives initial secrets.
* |rx_secret| and |tx_secret| must point to the buffer of at least 32
* bytes capacity. rx for read and tx for write. This function
* writes rx and tx secrets into |rx_secret| and |tx_secret|
* respectively. The length of secret is 32 bytes long.
* |client_dcid| is the destination connection ID in first Initial
* packet of client. If |initial_secret| is not NULL, the initial
* secret is written to it. It must point to the buffer which has at
* least 32 bytes capacity. The initial secret is 32 bytes long.
* |side| specifies the side of application.
*
* This function returns 0 if it succeeds, or -1.
*/
int ngtcp2_crypto_derive_initial_secrets(uint8_t *rx_secret, uint8_t *tx_secret,
uint8_t *initial_secret,
const ngtcp2_cid *client_dcid,
ngtcp2_crypto_side side);
/**
* @function
*
* `ngtcp2_crypto_update_traffic_secret` derives the next generation
* of the traffic secret. |secret| specifies the current secret and
* its length is given in |secretlen|. The length of new key is the
* same as the current key. This function writes new key into the
* buffer pointed by |dest|. |dest| must have the enough capacity to
* store the new key.
*
* This function returns 0 if it succeeds, or -1.
*/
int ngtcp2_crypto_update_traffic_secret(uint8_t *dest,
const ngtcp2_crypto_md *md,
const uint8_t *secret,
size_t secretlen);
/**
* @function
*
* `ngtcp2_crypto_set_local_transport_params` sets QUIC transport
* parameter, which is encoded in wire format and stored in the buffer
* pointed by |buf| of length |len|, to the native handle |tls|.
*
* |tls| points to a implementation dependent TLS session object. If
* libngtcp2_crypto_openssl is linked, |tls| must be a pointer to SSL
* object.
*
* This function returns 0 if it succeeds, or -1.
*/
int ngtcp2_crypto_set_local_transport_params(void *tls, const uint8_t *buf,
size_t len);
/**
* @function
*
* `ngtcp2_crypto_set_remote_transport_params` retrieves a remote QUIC
* transport parameters from |tls| and sets it to |conn| using
* `ngtcp2_conn_set_remote_transport_params`.
*
* |tls| points to a implementation dependent TLS session object. If
* libngtcp2_crypto_openssl is linked, |tls| must be a pointer to SSL
* object.
*
* This function returns 0 if it succeeds, or -1.
*/
int ngtcp2_crypto_set_remote_transport_params(ngtcp2_conn *conn, void *tls);
/**
* @function
*
* `ngtcp2_crypto_derive_and_install_initial_key` derives initial
* keying materials and installs keys to |conn|.
*
* If |rx_secret| is not NULL, the secret for decryption is written to
* the buffer pointed by |rx_secret|. The length of secret is 32
* bytes, and |rx_secret| must point to the buffer which has enough
* capacity.
*
* If |tx_secret| is not NULL, the secret for encryption is written to
* the buffer pointed by |tx_secret|. The length of secret is 32
* bytes, and |tx_secret| must point to the buffer which has enough
* capacity.
*
* If |initial_secret| is not NULL, the initial secret is written to
* the buffer pointed by |initial_secret|. The length of secret is 32
* bytes, and |initial_secret| must point to the buffer which has
* enough capacity.
*
* |client_dcid| is the destination connection ID in first Initial
* packet of client.
*
* If |rx_key| is not NULL, the derived packet protection key for
* decryption is written to the buffer pointed by |rx_key|. If
* |rx_iv| is not NULL, the derived packet protection IV for
* decryption is written to the buffer pointed by |rx_iv|. If |rx_hp|
* is not NULL, the derived header protection key for decryption is
* written to the buffer pointed by |rx_hp|.
*
* If |tx_key| is not NULL, the derived packet protection key for
* encryption is written to the buffer pointed by |tx_key|. If
* |tx_iv| is not NULL, the derived packet protection IV for
* encryption is written to the buffer pointed by |tx_iv|. If |tx_hp|
* is not NULL, the derived header protection key for encryption is
* written to the buffer pointed by |tx_hp|.
*
* The length of packet protection key and header protection key is 16
* bytes long. The length of packet protection IV is 12 bytes long.
*
* This function calls `ngtcp2_conn_set_initial_crypto_ctx` to set
* initial AEAD and message digest algorithm. After the successful
* call of this function, application can use
* `ngtcp2_conn_get_initial_crypto_ctx` to get the object.
*
* This function returns 0 if it succeeds, or -1.
*/
int ngtcp2_crypto_derive_and_install_initial_key(
ngtcp2_conn *conn, uint8_t *rx_secret, uint8_t *tx_secret,
uint8_t *initial_secret, uint8_t *rx_key, uint8_t *rx_iv, uint8_t *rx_hp,
uint8_t *tx_key, uint8_t *tx_iv, uint8_t *tx_hp,
const ngtcp2_cid *client_dcid);
#endif /* NGTCP2_SHARED_H */
|