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/*
* ECDH tests
*
* (C) 2007 Manuel Hartl (hartl@flexsecure.de)
* 2008 Jack Lloyd
*
* Distributed under the terms of the Botan license
*/
#include <botan/build.h>
#include "validate.h"
#include "common.h"
#if defined(BOTAN_HAS_ECDH)
#include <iostream>
#include <fstream>
#include <botan/symkey.h>
#include <botan/ecdh.h>
#include <botan/x509self.h>
#include <botan/der_enc.h>
using namespace Botan;
#define CHECK_MESSAGE(expr, print) try { if(!(expr)) std::cout << print << "\n"; } catch(std::exception& e) { std::cout << __FUNCTION__ << ": " << e.what() << "\n"; }
#define CHECK(expr) try { if(!(expr)) std::cout << #expr << "\n"; } catch(std::exception& e) { std::cout << __FUNCTION__ << ": " << e.what() << "\n"; }
namespace {
void test_ecdh_normal_derivation(RandomNumberGenerator& rng)
{
std::cout << "." << std::flush;
/*
std::string p_secp = "ffffffffffffffffffffffffffffffff7fffffff";
std::string a_secp = "ffffffffffffffffffffffffffffffff7ffffffc";
std::string b_secp = "1c97befc54bd7a8b65acf89f81d4d4adc565fa45";
std::string G_secp_comp = "024a96b5688ef573284664698968c38bb913cbfc82";
::Botan::SecureVector<byte> sv_p_secp = decode_hex(p_secp);
::Botan::SecureVector<byte> sv_a_secp = decode_hex(a_secp);
::Botan::SecureVector<byte> sv_b_secp = decode_hex(b_secp);
::Botan::SecureVector<byte> sv_G_secp_comp = decode_hex(G_secp_comp);
BigInt bi_p_secp = BigInt::decode(sv_p_secp.begin(), sv_p_secp.size());
BigInt bi_a_secp = BigInt::decode(sv_a_secp.begin(), sv_a_secp.size());
BigInt bi_b_secp = BigInt::decode(sv_b_secp.begin(), sv_b_secp.size());
CurveGFp secp160r1(GFpElement(bi_p_secp,bi_a_secp), GFpElement(bi_p_secp, bi_b_secp), bi_p_secp);
*/
std::string g_secp("024a96b5688ef573284664698968c38bb913cbfc82");
Botan::SecureVector<Botan::byte> sv_g_secp = decode_hex(g_secp);
BigInt bi_p_secp("0xffffffffffffffffffffffffffffffff7fffffff");
BigInt bi_a_secp("0xffffffffffffffffffffffffffffffff7ffffffc");
BigInt bi_b_secp("0x1c97befc54bd7a8b65acf89f81d4d4adc565fa45");
BigInt order = BigInt("0x0100000000000000000001f4c8f927aed3ca752257");
CurveGFp curve(bi_p_secp, bi_a_secp, bi_b_secp);
BigInt cofactor = BigInt(1);
PointGFp p_G = OS2ECP ( sv_g_secp, curve );
Botan::EC_Domain_Params dom_pars = Botan::EC_Domain_Params(curve, p_G, order, cofactor);
/**
* begin ECDH
*/
// alices key (a key constructed by domain parameters IS an ephimeral key!)
Botan::ECDH_PrivateKey private_a(rng, dom_pars);
Botan::ECDH_PublicKey public_a = private_a; // Bob gets this
// Bob creates a key with a matching group
Botan::ECDH_PrivateKey private_b(rng, dom_pars); //public_a.getCurve()
// Bob sends the key back to Alice
Botan::ECDH_PublicKey public_b = private_b; // Alice gets this
// Both of them create a key using their private key and the other's
// public key
Botan::SymmetricKey alice_key = private_a.derive_key(public_b);
Botan::SymmetricKey bob_key = private_b.derive_key(public_a);
if(alice_key != bob_key)
{
std::cout << "The two keys didn't match!\n";
std::cout << "Alice's key was: " << alice_key.as_string() << "\n";
std::cout << "Bob's key was: " << bob_key.as_string() << "\n";
}
}
void test_ecdh_some_dp(RandomNumberGenerator& rng)
{
std::vector<std::string> oids;
oids.push_back("1.2.840.10045.3.1.7");
oids.push_back("1.3.132.0.8");
oids.push_back("1.2.840.10045.3.1.1");
for(Botan::u32bit i = 0; i< oids.size(); i++)
{
std::cout << "." << std::flush;
Botan::OID oid(oids[i]);
Botan::EC_Domain_Params dom_pars(oid);
Botan::ECDH_PrivateKey private_a(rng, dom_pars);
Botan::ECDH_PublicKey public_a = private_a;
/*auto_ptr<Botan::X509_Encoder> x509_key_enc = public_a.x509_encoder();
Botan::MemoryVector<Botan::byte> enc_key_a = Botan::DER_Encoder()
.start_cons(Botan::SEQUENCE)
.encode(x509_key_enc->alg_id())
.encode(x509_key_enc->key_bits(), Botan::BIT_STRING)
.end_cons()
.get_contents();*/
Botan::ECDH_PrivateKey private_b(rng, dom_pars);
Botan::ECDH_PublicKey public_b = private_b;
// to test the equivalence, we
// use the direct derivation method here
Botan::SymmetricKey alice_key = private_a.derive_key(public_b);
//cout << "encoded key = " << hex_encode(enc_key_a.begin(), enc_key_a.size()) << endl;
Botan::SymmetricKey bob_key = private_b.derive_key(public_a);
CHECK_MESSAGE(alice_key == bob_key, "different keys - " << "Alice's key was: " << alice_key.as_string() << ", Bob's key was: " << bob_key.as_string());
//cout << "key: " << alice_key.as_string() << endl;
}
}
void test_ecdh_der_derivation(RandomNumberGenerator& rng)
{
std::vector<std::string> oids;
oids.push_back("1.2.840.10045.3.1.7");
oids.push_back("1.3.132.0.8");
oids.push_back("1.2.840.10045.3.1.1");
for(Botan::u32bit i = 0; i< oids.size(); i++)
{
Botan::OID oid(oids[i]);
Botan::EC_Domain_Params dom_pars(oid);
Botan::ECDH_PrivateKey private_a(rng, dom_pars);
Botan::ECDH_PublicKey public_a = private_a;
Botan::ECDH_PrivateKey private_b(rng, dom_pars);
Botan::ECDH_PublicKey public_b = private_b;
Botan::MemoryVector<Botan::byte> key_der_a = private_a.public_value();
Botan::MemoryVector<Botan::byte> key_der_b = private_b.public_value();
Botan::SymmetricKey alice_key = private_a.derive_key(key_der_b.begin(), key_der_b.size());
Botan::SymmetricKey bob_key = private_b.derive_key(key_der_a.begin(), key_der_a.size());
CHECK_MESSAGE(alice_key == bob_key, "different keys - " << "Alice's key was: " << alice_key.as_string() << ", Bob's key was: " << bob_key.as_string());
//cout << "key: " << alice_key.as_string() << endl;
}
}
/**
* The following test tests the copy ctors and and copy-assignment operators
*/
void test_ecdh_cp_ctor_as_op(RandomNumberGenerator& rng)
{
std::cout << "." << std::flush;
std::string g_secp("024a96b5688ef573284664698968c38bb913cbfc82");
Botan::SecureVector<Botan::byte> sv_g_secp = decode_hex(g_secp);
BigInt bi_p_secp("0xffffffffffffffffffffffffffffffff7fffffff");
BigInt bi_a_secp("0xffffffffffffffffffffffffffffffff7ffffffc");
BigInt bi_b_secp("0x1c97befc54bd7a8b65acf89f81d4d4adc565fa45");
BigInt order = BigInt("0x0100000000000000000001f4c8f927aed3ca752257");
CurveGFp curve(bi_p_secp, bi_a_secp, bi_b_secp);
BigInt cofactor = BigInt(1);
PointGFp p_G = OS2ECP ( sv_g_secp, curve );
Botan::EC_Domain_Params dom_pars = Botan::EC_Domain_Params(curve, p_G, order, cofactor);
/**
* begin ECDH
*/
// alices key (a key constructed by domain parameters IS an ephimeral key!)
Botan::ECDH_PrivateKey private_a(rng, dom_pars);
Botan::ECDH_PrivateKey private_a2(private_a);
Botan::ECDH_PrivateKey private_a3 = private_a2;
Botan::ECDH_PublicKey public_a = private_a; // Bob gets this
Botan::ECDH_PublicKey public_a2(public_a);
Botan::ECDH_PublicKey public_a3 = public_a;
// Bob creates a key with a matching group
Botan::ECDH_PrivateKey private_b(rng, dom_pars); //public_a.getCurve()
// Bob sends the key back to Alice
Botan::ECDH_PublicKey public_b = private_b; // Alice gets this
// Both of them create a key using their private key and the other's
// public key
Botan::SymmetricKey alice_key = private_a.derive_key(public_b);
Botan::SymmetricKey alice_key_2 = private_a2.derive_key(public_b);
Botan::SymmetricKey alice_key_3 = private_a3.derive_key(public_b);
Botan::SymmetricKey bob_key = private_b.derive_key(public_a);
Botan::SymmetricKey bob_key_2 = private_b.derive_key(public_a2);
Botan::SymmetricKey bob_key_3 = private_b.derive_key(public_a3);
CHECK_MESSAGE(alice_key == bob_key, "different keys - " << "Alice's key was: " << alice_key.as_string() << ", Bob's key was: " << bob_key.as_string());
CHECK_MESSAGE(alice_key_2 == bob_key_2, "different keys - " << "Alice's key was: " << alice_key.as_string() << ", Bob's key was: " << bob_key.as_string());
CHECK_MESSAGE(alice_key_3 == bob_key_3, "different keys - " << "Alice's key was: " << alice_key.as_string() << ", Bob's key was: " << bob_key.as_string());
CHECK_MESSAGE(alice_key == bob_key_2, "different keys - " << "Alice's key was: " << alice_key.as_string() << ", Bob's key was: " << bob_key.as_string());
CHECK_MESSAGE(alice_key_2 == bob_key_3, "different keys - " << "Alice's key was: " << alice_key.as_string() << ", Bob's key was: " << bob_key.as_string());
}
}
u32bit do_ecdh_tests(Botan::RandomNumberGenerator& rng)
{
std::cout << "Testing ECDH (InSiTo unit tests): ";
test_ecdh_normal_derivation(rng);
test_ecdh_some_dp(rng);
test_ecdh_der_derivation(rng);
test_ecdh_cp_ctor_as_op(rng);
std::cout << std::endl;
return 0;
}
#else
u32bit do_ecdh_tests(Botan::RandomNumberGenerator&) { return 0; }
#endif
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