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
|
/*
* (C) 2015 Jack Lloyd
*
* Botan is released under the Simplified BSD License (see license.txt)
*/
#include "apps.h"
#include <fstream>
#include <botan/auto_rng.h>
#if defined(BOTAN_HAS_X509_CERTIFICATES)
#include <botan/x509cert.h>
#include <botan/x509_crl.h>
#include <botan/pkcs8.h>
#endif
#if defined(BOTAN_HAS_TLS)
#include <botan/tls_client.h>
#endif
namespace {
#if defined(BOTAN_HAS_TLS)
class Fuzzer_Creds : public Credentials_Manager
{
public:
void verify_certificate_chain(const std::string& type,
const std::string& purported_hostname,
const std::vector<X509_Certificate>& cert_chain) override
{
try
{
Credentials_Manager::verify_certificate_chain(type,
purported_hostname,
cert_chain);
}
catch(std::exception& e) {}
}
std::string psk_identity_hint(const std::string&, const std::string&) override { return "psk_hint"; }
std::string psk_identity(const std::string&, const std::string&) { return "psk_id"; }
SymmetricKey psk(const std::string&, const std::string&, const std::string&) override
{
return SymmetricKey("AABBCCDDEEFF00112233445566778899");
}
};
#endif
int fuzzer(int argc, char* argv[])
{
if(argc != 3)
{
std::cout << "Usage: " << argv[0] << " [type] [input_file]\n";
std::cout << "Hook for fuzzers such as afl (produces no output)\n";
std::cout << "Types: cert crl privkey tls_client\n";
return 1;
}
const std::string type = argv[1];
const std::string input = argv[2];
AutoSeeded_RNG rng;
#if defined(BOTAN_HAS_X509_CERTIFICATES)
if(type == "cert")
{
X509_Certificate cert(input);
return 0;
}
if(type == "crl")
{
X509_CRL crl(input);
return 0;
}
if(type == "privkey")
{
std::unique_ptr<Private_Key>(PKCS8::load_key(input, rng));
return 0;
}
#endif
#if defined(BOTAN_HAS_TLS)
if(type == "tls_client")
{
auto dev_null = [](const byte[], size_t) {};
auto ignore_alerts = [](TLS::Alert, const byte[], size_t) {};
auto ignore_hs = [](const TLS::Session&) { return true; };
TLS::Session_Manager_In_Memory session_manager(rng);
TLS::Policy policy;
TLS::Protocol_Version client_offer = TLS::Protocol_Version::TLS_V12;
TLS::Server_Information info("server.name", 443);
const std::vector<std::string> protocols_to_offer = { "fuzz/1.0", "http/1.1", "bunny/1.21.3" };
Fuzzer_Creds creds;
TLS::Client client(dev_null,
dev_null,
ignore_alerts,
ignore_hs,
session_manager,
creds,
policy,
rng,
info,
client_offer,
protocols_to_offer);
std::ifstream in(input.c_str());
std::vector<byte> buf(1024);
try
{
while(in.good())
{
in.read((char*)&buf[0], buf.size());
size_t got = in.gcount();
client.received_data(&buf[0], got);
}
}
catch(std::exception& e)
{
return 0;
}
return 0;
}
#endif
std::cout << "Unknown type '" << type << "'\n";
return 1;
}
REGISTER_APP(fuzzer);
}
|
