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/*
* (C) 2016 Jack Lloyd
*
* Botan is released under the Simplified BSD License (see license.txt)
*/
#define BOTAN_NO_DEPRECATED_WARNINGS
#include "tests.h"
#if defined(BOTAN_HAS_DL_GROUP)
#include <botan/dl_group.h>
#include <botan/workfactor.h>
#endif
namespace Botan_Tests {
#if defined(BOTAN_HAS_DL_GROUP)
namespace {
class DL_Group_Tests final : public Test
{
public:
std::vector<Test::Result> run() override
{
std::vector<Test::Result> results;
Botan::RandomNumberGenerator& rng = Test::rng();
results.push_back(test_dl_encoding());
results.push_back(test_dl_named(rng));
results.push_back(test_dl_generate(rng));
results.push_back(test_dl_errors());
return results;
}
private:
Test::Result test_dl_errors()
{
Test::Result result("DL_Group errors");
result.test_throws("Uninitialized",
"DL_Group uninitialized",
[]() { Botan::DL_Group dl; dl.get_p(); });
result.test_throws("Bad generator param",
"Invalid argument DL_Group unknown PrimeType",
[]() {
auto invalid_type = static_cast<Botan::DL_Group::PrimeType>(666);
Botan::DL_Group dl(Test::rng(), invalid_type, 1024);
});
return result;
}
Test::Result test_dl_encoding()
{
Test::Result result("DL_Group encoding");
const Botan::DL_Group orig("modp/ietf/1024");
const std::string pem1 = orig.PEM_encode(Botan::DL_Group::ANSI_X9_42);
const std::string pem2 = orig.PEM_encode(Botan::DL_Group::ANSI_X9_57);
const std::string pem3 = orig.PEM_encode(Botan::DL_Group::PKCS_3);
Botan::DL_Group group1(pem1);
result.test_eq("Same p in X9.42 decoding", group1.get_p(), orig.get_p());
result.test_eq("Same q in X9.42 decoding", group1.get_q(), orig.get_q());
result.test_eq("Same g in X9.42 decoding", group1.get_g(), orig.get_g());
result.test_eq("PEM encodings match",
group1.PEM_encode(Botan::DL_Group::ANSI_X9_42),
Botan::DL_Group::PEM_for_named_group("modp/ietf/1024"));
Botan::DL_Group group2(pem2);
result.test_eq("Same p in X9.57 decoding", group2.get_p(), orig.get_p());
result.test_eq("Same q in X9.57 decoding", group2.get_q(), orig.get_q());
result.test_eq("Same g in X9.57 decoding", group2.get_g(), orig.get_g());
Botan::DL_Group group3(pem3);
result.test_eq("Same p in X9.57 decoding", group3.get_p(), orig.get_p());
// no q in PKCS #3 format
result.test_eq("Same g in X9.57 decoding", group3.get_g(), orig.get_g());
return result;
}
Test::Result test_dl_generate(Botan::RandomNumberGenerator& rng)
{
Test::Result result("DL_Group generate");
result.start_timer();
Botan::DL_Group dh1050(rng, Botan::DL_Group::Prime_Subgroup, 1050, 175);
result.test_eq("DH p size", dh1050.get_p().bits(), 1050);
result.test_eq("DH q size", dh1050.get_q().bits(), 175);
result.test_lte("DH g size", dh1050.get_g().bits(), 1050);
result.test_eq("DH group verifies", dh1050.verify_group(rng, true), true);
Botan::DL_Group dh_implicit_q(rng, Botan::DL_Group::Prime_Subgroup, 1040);
result.test_eq("DH p size", dh_implicit_q.get_p().bits(), 1040);
result.test_eq("DH q size", dh_implicit_q.get_q().bits(), Botan::dl_exponent_size(1040));
result.test_eq("DH group verifies", dh_implicit_q.verify_group(rng, true), true);
Botan::DL_Group dh_strong(rng, Botan::DL_Group::Strong, 1025);
result.test_eq("DH p size", dh_strong.get_p().bits(), 1025);
result.test_eq("DH q size", dh_strong.get_q().bits(), 1024);
result.test_eq("DH group verifies", dh_strong.verify_group(rng, true), true);
#if defined(BOTAN_HAS_SHA1)
Botan::DL_Group dsa1024(rng, Botan::DL_Group::DSA_Kosherizer, 1024);
result.test_eq("DSA p size", dsa1024.get_p().bits(), 1024);
result.test_eq("DSA q size", dsa1024.get_q().bits(), 160);
result.test_lte("DSA g size", dsa1024.get_g().bits(), 1024);
result.test_eq("DSA group verifies", dsa1024.verify_group(rng, true), true);
const std::vector<uint8_t> short_seed(16);
const std::vector<uint8_t> invalid_seed(20);
const std::vector<uint8_t> working_seed = Botan::hex_decode("0000000000000000000000000000000000000021");
result.test_throws("DSA seed does not generate group",
"Invalid argument DL_Group: The seed given does not generate a DSA group",
[&rng,&invalid_seed]() { Botan::DL_Group dsa(rng, invalid_seed, 1024, 160); });
result.test_throws("DSA seed is too short",
"Invalid argument Generating a DSA parameter set with a 160 bit long q requires a seed at least as many bits long",
[&rng,&short_seed]() { Botan::DL_Group dsa(rng, short_seed, 1024, 160); });
// From FIPS 186-3 test data
const std::vector<uint8_t> seed = Botan::hex_decode("1F5DA0AF598EEADEE6E6665BF880E63D8B609BA2");
result.test_throws("invalid params", [&]() { Botan::DL_Group invalid(rng, seed, 1024, 224); });
result.test_throws("invalid params", [&]() { Botan::DL_Group invalid(rng, seed, 3072, 224); });
result.test_throws("invalid params", [&]() { Botan::DL_Group invalid(rng, seed, 2048, 256); });
Botan::DL_Group dsa_from_seed(rng, seed, 1024, 160);
result.test_eq("DSA q from seed", dsa_from_seed.get_q(),
Botan::BigInt("0xAB1A788BCE3C557A965A5BFA6908FAA665FDEB7D"));
// Modulo just to avoid embedding entire 1024-bit P in src file
result.test_eq("DSA p from seed", static_cast<size_t>(dsa_from_seed.get_p() % 4294967291), size_t(2513712339));
result.test_eq("DSA group from seed verifies", dsa_from_seed.verify_group(rng, true), true);
#endif
result.end_timer();
return result;
}
Test::Result test_dl_named(Botan::RandomNumberGenerator& rng)
{
const std::vector<std::string> dl_named =
{
"modp/ietf/1024",
"modp/ietf/1536",
"modp/ietf/2048",
"modp/ietf/3072",
"modp/ietf/4096",
"modp/ietf/6144",
"modp/ietf/8192",
"modp/srp/1024",
"modp/srp/1536",
"modp/srp/2048",
"modp/srp/3072",
"modp/srp/4096",
"modp/srp/6144",
"modp/srp/8192",
"dsa/jce/1024",
"dsa/botan/2048",
"dsa/botan/3072",
"ffdhe/ietf/2048",
"ffdhe/ietf/3072",
"ffdhe/ietf/4096",
"ffdhe/ietf/6144",
"ffdhe/ietf/8192",
};
Test::Result result("DL_Group named");
result.start_timer();
for(std::string name : dl_named)
{
// Confirm we can load every group we expect
Botan::DL_Group group(name);
result.test_ne("DL_Group p is set", group.get_p(), 0);
result.test_ne("DL_Group g is set", group.get_g(), 0);
const size_t strength = group.estimated_strength();
// 8192 bit ~~ 2**202 strength
result.confirm("Plausible strength", strength >= 80 && strength < 210);
if(name.find("modp/srp/") == std::string::npos)
{
result.test_ne("DL_Group q is set", group.get_q(), 0);
}
else
{
result.test_eq("DL_Group q is not set for SRP groups", group.get_q(), 0);
}
if(group.p_bits() < 2048 || Test::run_long_tests())
{
result.test_eq(name + " verifies", group.verify_group(rng, false), true);
}
}
result.end_timer();
return result;
}
};
BOTAN_REGISTER_TEST("dl_group", DL_Group_Tests);
}
#endif
}
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