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#include <botan/botan.h>
#include <botan/x931_rng.h>
#include <botan/filters.h>
#include <botan/lookup.h>
#include <iostream>
#include <fstream>
#include <boost/algorithm/string.hpp>
#include <stdexcept>
using namespace Botan;
std::vector<std::pair<std::string, std::string> > read_file(const std::string&);
SecureVector<byte> decode_hex(const std::string& in)
{
SecureVector<byte> result;
try {
Botan::Pipe pipe(new Botan::Hex_Decoder);
pipe.process_msg(in);
result = pipe.read_all();
}
catch(std::exception& e)
{
result.destroy();
}
return result;
}
std::string hex_encode(const byte in[], u32bit len)
{
Botan::Pipe pipe(new Botan::Hex_Encoder);
pipe.process_msg(in, len);
return pipe.read_all_as_string();
}
class Fixed_Output_RNG : public RandomNumberGenerator
{
public:
bool is_seeded() const { return !buf.empty(); }
byte random()
{
if(buf.empty())
throw std::runtime_error("Out of bytes");
byte out = buf.front();
buf.pop_front();
return out;
}
void randomize(byte out[], u32bit len) throw()
{
for(u32bit j = 0; j != len; j++)
out[j] = random();
}
std::string name() const { return "Fixed_Output_RNG"; }
void clear() throw() {}
void add_entropy(const byte in[], u32bit len)
{
buf.insert(buf.end(), in, in + len);
}
void add_entropy_source(EntropySource* es) { delete es; }
Fixed_Output_RNG() {}
private:
std::deque<byte> buf;
};
void x931_tests(std::vector<std::pair<std::string, std::string> > vecs,
const std::string& cipher)
{
for(size_t j = 0; j != vecs.size(); ++j)
{
const std::string result = vecs[j].first;
const std::string input = vecs[j].second;
ANSI_X931_RNG prng(get_block_cipher(cipher),
new Fixed_Output_RNG);
SecureVector<byte> x = decode_hex(input);
prng.add_entropy(x.begin(), x.size());
SecureVector<byte> output(result.size() / 2);
prng.randomize(output, output.size());
if(decode_hex(result) != output)
std::cout << "FAIL";
else
std::cout << "PASS";
std::cout << " Seed " << input << " "
<< "Got " << hex_encode(output, output.size()) << " "
<< "Exp " << result << "\n";
}
}
int main()
{
x931_tests(read_file("ANSI931_AES128VST.txt.vst"), "AES-128");
x931_tests(read_file("ANSI931_AES192VST.txt.vst"), "AES-192");
x931_tests(read_file("ANSI931_AES256VST.txt.vst"), "AES-256");
x931_tests(read_file("ANSI931_TDES2VST.txt.vst"), "TripleDES");
x931_tests(read_file("ANSI931_TDES3VST.txt.vst"), "TripleDES");
}
std::vector<std::pair<std::string, std::string> >
read_file(const std::string& fsname)
{
std::ifstream in(fsname.c_str());
std::vector<std::pair<std::string, std::string> > out;
while(in.good())
{
std::string line;
std::getline(in, line);
if(line == "")
break;
std::vector<std::string> l;
boost::split(l, line, boost::is_any_of(":"));
if(l.size() != 2)
throw std::runtime_error("Bad line " + line);
out.push_back(std::make_pair(l[0], l[1]));
}
return out;
}
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