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/*
* (C) 2014,2015 Jack Lloyd
* (C) 2017 René Korthaus, Rohde & Schwarz Cybersecurity
*
* Botan is released under the Simplified BSD License (see license.txt)
*/
#include "tests.h"
#include "test_rng.h"
#if defined(BOTAN_HAS_ECDSA)
#include "test_pubkey.h"
#include <botan/ecdsa.h>
#include <botan/oids.h>
#endif
namespace Botan_Tests {
namespace {
#if defined(BOTAN_HAS_ECDSA)
class ECDSA_Verification_Tests final : public PK_Signature_Verification_Test
{
public:
ECDSA_Verification_Tests() : PK_Signature_Verification_Test(
"ECDSA",
"pubkey/ecdsa_verify.vec",
"Group,Px,Py,Hash,Msg,Signature") {}
bool clear_between_callbacks() const override
{
return false;
}
std::unique_ptr<Botan::Public_Key> load_public_key(const VarMap& vars) override
{
const std::string group_id = vars.get_req_str("Group");
const BigInt px = vars.get_req_bn("Px");
const BigInt py = vars.get_req_bn("Py");
Botan::EC_Group group(Botan::OIDS::lookup(group_id));
const Botan::PointGFp public_point = group.point(px, py);
std::unique_ptr<Botan::Public_Key> key(new Botan::ECDSA_PublicKey(group, public_point));
return key;
}
std::string default_padding(const VarMap&) const override
{
return "Raw";
}
};
class ECDSA_Wycheproof_Verification_Tests final : public PK_Signature_Verification_Test
{
public:
ECDSA_Wycheproof_Verification_Tests() : PK_Signature_Verification_Test(
"ECDSA",
"pubkey/ecdsa_wycheproof.vec",
"Group,Px,Py,Hash,Msg,Signature",
"Valid") {}
bool clear_between_callbacks() const override
{
return false;
}
Botan::Signature_Format sig_format() const override
{
return Botan::DER_SEQUENCE;
}
bool test_random_invalid_sigs() const override { return false; }
std::unique_ptr<Botan::Public_Key> load_public_key(const VarMap& vars) override
{
const std::string group_id = vars.get_req_str("Group");
const BigInt px = vars.get_req_bn("Px");
const BigInt py = vars.get_req_bn("Py");
Botan::EC_Group group(Botan::OIDS::lookup(group_id));
const Botan::PointGFp public_point = group.point(px, py);
std::unique_ptr<Botan::Public_Key> key(new Botan::ECDSA_PublicKey(group, public_point));
return key;
}
std::string default_padding(const VarMap& vars) const override
{
return "EMSA1(" + vars.get_req_str("Hash") + ")";
}
};
class ECDSA_Signature_KAT_Tests final : public PK_Signature_Generation_Test
{
public:
ECDSA_Signature_KAT_Tests() : PK_Signature_Generation_Test(
"ECDSA",
#if defined(BOTAN_HAS_RFC6979_GENERATOR)
"pubkey/ecdsa_rfc6979.vec",
"Group,X,Hash,Msg,Signature") {}
#else
"pubkey/ecdsa_prob.vec",
"Group,X,Hash,Msg,Nonce,Signature") {}
#endif
bool clear_between_callbacks() const override
{
return false;
}
std::unique_ptr<Botan::Private_Key> load_private_key(const VarMap& vars) override
{
const std::string group_id = vars.get_req_str("Group");
const BigInt x = vars.get_req_bn("X");
Botan::EC_Group group(Botan::OIDS::lookup(group_id));
std::unique_ptr<Botan::Private_Key> key(new Botan::ECDSA_PrivateKey(Test::rng(), group, x));
return key;
}
std::string default_padding(const VarMap& vars) const override
{
const std::string hash = vars.get_req_str("Hash");
if(hash.substr(0,3) == "Raw")
return hash;
return "EMSA1(" + hash + ")";
}
#if !defined(BOTAN_HAS_RFC6979_GENERATOR)
Botan::RandomNumberGenerator* test_rng(const std::vector<uint8_t>& nonce) const override
{
// probabilistic ecdsa signature generation extracts more random than just the nonce,
// but the nonce is extracted first
return new Fixed_Output_Position_RNG(nonce, 1);
}
#endif
};
class ECDSA_Keygen_Tests final : public PK_Key_Generation_Test
{
public:
std::vector<std::string> keygen_params() const override
{
return { "secp256r1", "secp384r1", "secp521r1", "frp256v1" };
}
std::string algo_name() const override
{
return "ECDSA";
}
};
#if defined(BOTAN_HAS_EMSA_RAW)
class ECDSA_Key_Recovery_Tests final : public Text_Based_Test
{
public:
ECDSA_Key_Recovery_Tests() :
Text_Based_Test("pubkey/ecdsa_key_recovery.vec", "Group,Msg,R,S,V,PubkeyX,PubkeyY") {}
Test::Result run_one_test(const std::string&, const VarMap& vars) override
{
Test::Result result("ECDSA key recovery");
const std::string group_id = vars.get_req_str("Group");
Botan::EC_Group group(group_id);
const BigInt R = vars.get_req_bn("R");
const BigInt S = vars.get_req_bn("S");
const uint8_t V = vars.get_req_u8("V");
const std::vector<uint8_t> msg = vars.get_req_bin("Msg");
const BigInt pubkey_x = vars.get_req_bn("PubkeyX");
const BigInt pubkey_y = vars.get_req_bn("PubkeyY");
try
{
Botan::ECDSA_PublicKey pubkey(group, msg, R, S, V);
result.test_eq("Pubkey X coordinate", pubkey.public_point().get_affine_x(), pubkey_x);
result.test_eq("Pubkey Y coordinate", pubkey.public_point().get_affine_y(), pubkey_y);
const uint8_t computed_V = pubkey.recovery_param(msg, R, S);
result.test_eq("Recovery param is correct", static_cast<size_t>(computed_V), static_cast<size_t>(V));
Botan::PK_Verifier verifier(pubkey, "Raw");
auto sig = Botan::BigInt::encode_fixed_length_int_pair(R, S, group.get_order_bytes());
result.confirm("Signature verifies", verifier.verify_message(msg, sig));
}
catch(Botan::Exception& e)
{
result.test_failure("Failed to recover ECDSA public key", e.what());
}
return result;
}
};
BOTAN_REGISTER_TEST("ecdsa_key_recovery", ECDSA_Key_Recovery_Tests);
#endif
class ECDSA_Invalid_Key_Tests final : public Text_Based_Test
{
public:
ECDSA_Invalid_Key_Tests() :
Text_Based_Test("pubkey/ecdsa_invalid.vec", "Group,InvalidKeyX,InvalidKeyY") {}
bool clear_between_callbacks() const override
{
return false;
}
Test::Result run_one_test(const std::string&, const VarMap& vars) override
{
Test::Result result("ECDSA invalid keys");
const std::string group_id = vars.get_req_str("Group");
Botan::EC_Group group(Botan::OIDS::lookup(group_id));
const Botan::BigInt x = vars.get_req_bn("InvalidKeyX");
const Botan::BigInt y = vars.get_req_bn("InvalidKeyY");
std::unique_ptr<Botan::PointGFp> public_point;
try
{
public_point.reset(new Botan::PointGFp(group.point(x, y)));
}
catch(Botan::Invalid_Argument&)
{
// PointGFp() performs a range check on x, y in [0, p−1],
// which is also part of the EC public key checks, e.g.,
// in NIST SP800-56A rev2, sec. 5.6.2.3.2
result.test_success("public key fails check");
return result;
}
std::unique_ptr<Botan::Public_Key> key(new Botan::ECDSA_PublicKey(group, *public_point));
result.test_eq("public key fails check", key->check_key(Test::rng(), false), false);
return result;
}
};
BOTAN_REGISTER_TEST("ecdsa_verify", ECDSA_Verification_Tests);
BOTAN_REGISTER_TEST("ecdsa_verify_wycheproof", ECDSA_Wycheproof_Verification_Tests);
BOTAN_REGISTER_TEST("ecdsa_sign", ECDSA_Signature_KAT_Tests);
BOTAN_REGISTER_TEST("ecdsa_keygen", ECDSA_Keygen_Tests);
BOTAN_REGISTER_TEST("ecdsa_invalid", ECDSA_Invalid_Key_Tests);
#endif
}
}
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