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
|
/*
* ngtcp2
*
* Copyright (c) 2020 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.
*/
#include "util.h"
#include <cassert>
#include <iostream>
#include <array>
#include <ngtcp2/ngtcp2_crypto.h>
#include <wolfssl/options.h>
#include <wolfssl/ssl.h>
#include <wolfssl/openssl/pem.h>
#include "template.h"
namespace ngtcp2 {
namespace util {
int generate_secure_random(uint8_t *data, size_t datalen) {
if (wolfSSL_RAND_bytes(data, static_cast<int>(datalen)) != 1) {
return -1;
}
return 0;
}
int generate_secret(uint8_t *secret, size_t secretlen) {
std::array<uint8_t, 16> rand;
std::array<uint8_t, 32> md;
assert(md.size() == secretlen);
if (generate_secure_random(rand.data(), rand.size()) != 0) {
return -1;
}
auto ctx = wolfSSL_EVP_MD_CTX_new();
if (ctx == nullptr) {
return -1;
}
unsigned int mdlen = md.size();
if (!wolfSSL_EVP_DigestInit_ex(ctx, EVP_sha256(), nullptr) ||
!wolfSSL_EVP_DigestUpdate(ctx, rand.data(), rand.size()) ||
!wolfSSL_EVP_DigestFinal_ex(ctx, md.data(), &mdlen)) {
wolfSSL_EVP_MD_CTX_free(ctx);
return -1;
}
std::copy_n(std::begin(md), secretlen, secret);
wolfSSL_EVP_MD_CTX_free(ctx);
return 0;
}
std::optional<std::string> read_token(const std::string_view &filename) {
auto f = wolfSSL_BIO_new_file(filename.data(), "r");
if (f == nullptr) {
std::cerr << "Could not open token file " << filename << std::endl;
return {};
}
char *name, *header;
unsigned char *data;
long datalen;
std::string token;
if (wolfSSL_PEM_read_bio(f, &name, &header, &data, &datalen) != 1) {
std::cerr << "Could not read token file " << filename << std::endl;
wolfSSL_BIO_free(f);
return {};
}
wolfSSL_BIO_free(f);
wolfSSL_OPENSSL_free(name);
wolfSSL_OPENSSL_free(header);
auto res = std::string{data, data + datalen};
wolfSSL_OPENSSL_free(data);
return res;
}
int write_token(const std::string_view &filename, const uint8_t *token,
size_t tokenlen) {
auto f = wolfSSL_BIO_new_file(filename.data(), "w");
if (f == nullptr) {
std::cerr << "Could not write token in " << filename << std::endl;
return -1;
}
wolfSSL_PEM_write_bio(f, "QUIC TOKEN", "", token, tokenlen);
wolfSSL_BIO_free(f);
return 0;
}
const char *crypto_default_ciphers() {
return "TLS_AES_128_GCM_SHA256:TLS_AES_256_GCM_SHA384:TLS_CHACHA20_POLY1305_"
"SHA256:TLS_AES_128_CCM_SHA256";
}
const char *crypto_default_groups() { return "X25519:P-256:P-384:P-521"; }
} // namespace util
} // namespace ngtcp2
|
