/usr/share/doc/libbotan1.10-dev/examples/sig_gen.cpp is in libbotan1.10-dev 1.10.8-2+deb8u2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 | /*
* (C) 2009 Jack Lloyd
*
* Distributed under the terms of the Botan license
*/
#include <iostream>
#include <fstream>
#include <string>
#include <vector>
#include <map>
#include <memory>
#include <botan/botan.h>
#include <botan/dsa.h>
#include <botan/pubkey.h>
using namespace Botan;
bool check(std::map<std::string, std::string>);
int main()
{
try {
Botan::LibraryInitializer init;
std::ifstream in("SigGen.rsp");
if(!in)
throw Exception("Can't open response file");
std::map<std::string, std::string> inputs;
while(in.good())
{
std::string line;
std::getline(in, line);
if(line == "" || line[0] == '[' || line[0] == '#')
continue;
std::vector<std::string> name_and_val = split_on(line, '=');
if(name_and_val.size() != 2)
throw Decoding_Error("Unexpected input: " + line);
name_and_val[0].erase(name_and_val[0].size()-1);
name_and_val[1].erase(0, 1);
std::string name = name_and_val[0], value = name_and_val[1];
inputs[name] = value;
if(name == "S")
{
bool result = check(inputs);
if(result == false)
{
std::cout << " Check failed\n";
std::map<std::string, std::string>::const_iterator i;
for(i = inputs.begin(); i != inputs.end(); i++)
std::cout << i->first << " = " << i->second << "\n";
}
inputs["Msg"] = inputs["R"] = inputs["S"] = "";
}
}
}
catch(std::exception& e)
{
std::cout << e.what() << std::endl;
return 1;
}
return 0;
}
bool check(std::map<std::string, std::string> inputs)
{
BigInt p("0x"+inputs["P"]),
q("0x"+inputs["Q"]),
g("0x"+inputs["G"]),
y("0x"+inputs["Y"]);
DSA_PublicKey key(DL_Group(p, q, g), y);
Pipe pipe(new Hex_Decoder);
pipe.process_msg(inputs["Msg"]);
pipe.start_msg();
pipe.write(inputs["R"]);
pipe.write(inputs["S"] );
pipe.end_msg();
PK_Verifier verifier(key, "EMSA1(SHA-1)");
return verifier.verify_message(pipe.read_all(0), pipe.read_all(1));
}
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