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/*
* (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&) { 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&)
{
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);
}
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