aboutsummaryrefslogtreecommitdiffstats
path: root/doc/examples/rng_test.cpp
blob: caefba6cd5895a204d83acfe27ccab28e4dcca45 (plain)
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
#include <botan/botan.h>
#include <botan/x931_rng.h>
#include <botan/filters.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(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;
   }