25457312714

Committed 06 May 2026 07:43PM UTC coverage: 89.331% (-2.3%) from 91.667%

Build # 25457312714

Build Type

push

github

Committed by

randombit

Commit Message

In TLS 1.3 verification of client certs, check the correct extension for OCSP

This was checking if the client asked us (the server) for OCSP, instead of
checking if we asked the client for OCSP when we sent the CertificateRequest.

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Source File
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93.91

/src/tests/test_ec_group.cpp

/*
* (C) 2007 Falko Strenzke
*     2007 Manuel Hartl
*     2009,2015,2018,2021 Jack Lloyd
*
* Botan is released under the Simplified BSD License (see license.txt)
*/

#include "tests.h"

#if defined(BOTAN_HAS_ECC_GROUP)
   #include <botan/bigint.h>
   #include <botan/data_src.h>
   #include <botan/ec_group.h>
   #include <botan/hex.h>
   #include <botan/numthry.h>
   #include <botan/pk_keys.h>
   #include <botan/rng.h>
   #include <botan/x509_key.h>
   #include <botan/internal/barrett.h>
   #include <botan/internal/ec_inner_data.h>
   #if defined(BOTAN_HAS_ECDSA)
      #include <botan/pk_algs.h>
   #endif
#endif

namespace Botan_Tests {

namespace {

#if defined(BOTAN_HAS_ECC_GROUP)

   #if defined(BOTAN_HAS_LEGACY_EC_POINT)

Botan::BigInt test_integer(Botan::RandomNumberGenerator& rng, size_t bits, const BigInt& max) {
   /*
   Produces integers with long runs of ones and zeros, for testing for
   carry handling problems.
   */
   Botan::BigInt x = 0;

   auto flip_prob = [](size_t i) -> double {
      if(i % 64 == 0) {
         return .5;
      }
      if(i % 32 == 0) {
         return .4;
      }
      if(i % 8 == 0) {
         return .05;
      }
      return .01;
   };

   bool active = (rng.next_byte() > 128) ? true : false;
   for(size_t i = 0; i != bits; ++i) {
      x <<= 1;
      x += static_cast<int>(active);

      const double prob = flip_prob(i);
      const double sample = double(rng.next_byte() % 100) / 100.0;  // biased

      if(sample < prob) {
         active = !active;
      }
   }

   if(x == 0) {
      // EC_Scalar rejects zero as an input, if we hit this case instead
      // test with a completely randomized scalar
      return BigInt::random_integer(rng, 1, max);
   }

   if(max > 0) {
      while(x >= max) {
         const size_t b = x.bits() - 1;
         BOTAN_ASSERT(x.get_bit(b) == true, "Set");
         x.clear_bit(b);
      }
   }

   return x;
}

Botan::EC_Point create_random_point(Botan::RandomNumberGenerator& rng, const Botan::EC_Group& group) {
   const Botan::BigInt& p = group.get_p();
   auto mod_p = Botan::Barrett_Reduction::for_public_modulus(p);

   for(;;) {
      const Botan::BigInt x = Botan::BigInt::random_integer(rng, 1, p);
      const Botan::BigInt x3 = mod_p.multiply(x, mod_p.square(x));
      const Botan::BigInt ax = mod_p.multiply(group.get_a(), x);
      const Botan::BigInt y = mod_p.reduce(x3 + ax + group.get_b());
      const Botan::BigInt sqrt_y = Botan::sqrt_modulo_prime(y, p);

      if(sqrt_y > 1) {
         BOTAN_ASSERT_EQUAL(mod_p.square(sqrt_y), y, "Square root is correct");
         return group.point(x, sqrt_y);
      }
   }
}

class ECC_Randomized_Tests final : public Test {
   public:
      std::vector<Test::Result> run() override;
};

std::vector<Test::Result> ECC_Randomized_Tests::run() {
   std::vector<Test::Result> results;
   for(const std::string& group_name : Botan::EC_Group::known_named_groups()) {
      Test::Result result("ECC randomized " + group_name);

      result.start_timer();

      auto group = Botan::EC_Group::from_name(group_name);

      const Botan::EC_Point pt = create_random_point(this->rng(), group);

      try {
         std::vector<Botan::BigInt> blind_ws;
         const size_t trials = (Test::run_long_tests() ? 10 : 3);
         for(size_t i = 0; i < trials; ++i) {
            const Botan::BigInt a = test_integer(rng(), group.get_order_bits(), group.get_order());
            const Botan::BigInt b = test_integer(rng(), group.get_order_bits(), group.get_order());
            const Botan::BigInt c = group.mod_order(a + b);

            const Botan::EC_Point P = pt * a;
            const Botan::EC_Point Q = pt * b;
            const Botan::EC_Point R = pt * c;

            Botan::EC_Point P1 = group.blinded_var_point_multiply(pt, a, this->rng(), blind_ws);
            Botan::EC_Point Q1 = group.blinded_var_point_multiply(pt, b, this->rng(), blind_ws);
            Botan::EC_Point R1 = group.blinded_var_point_multiply(pt, c, this->rng(), blind_ws);

            Botan::EC_Point A1 = P + Q;
            Botan::EC_Point A2 = Q + P;

            result.test_bin_eq("p + q", A1.xy_bytes(), R.xy_bytes());
            result.test_bin_eq("q + p", A2.xy_bytes(), R.xy_bytes());

            A1.force_affine();
            A2.force_affine();
            result.test_bin_eq("p + q", A1.xy_bytes(), R.xy_bytes());
            result.test_bin_eq("q + p", A2.xy_bytes(), R.xy_bytes());

            result.test_is_true("p on the curve", P.on_the_curve());
            result.test_is_true("q on the curve", Q.on_the_curve());
            result.test_is_true("r on the curve", R.on_the_curve());

            result.test_bin_eq("P1", P1.xy_bytes(), P.xy_bytes());
            result.test_bin_eq("Q1", Q1.xy_bytes(), Q.xy_bytes());
            result.test_bin_eq("R1", R1.xy_bytes(), R.xy_bytes());

            P1.force_affine();
            Q1.force_affine();
            R1.force_affine();
            result.test_bin_eq("P1", P1.xy_bytes(), P.xy_bytes());
            result.test_bin_eq("Q1", Q1.xy_bytes(), Q.xy_bytes());
            result.test_bin_eq("R1", R1.xy_bytes(), R.xy_bytes());
         }
      } catch(std::exception& e) {
         result.test_failure(group_name, e.what());
      }
      result.end_timer();
      results.push_back(result);
   }

   return results;
}

BOTAN_REGISTER_TEST("pubkey", "ecc_randomized", ECC_Randomized_Tests);

   #endif

class EC_Group_Tests : public Test {
   public:
      std::vector<Test::Result> run() override {
         std::vector<Test::Result> results;

         for(const std::string& group_name : Botan::EC_Group::known_named_groups()) {
            Test::Result result("EC_Group " + group_name);

            result.start_timer();

            const auto group = Botan::EC_Group::from_name(group_name);

            result.test_is_true("EC_Group is known", group.get_curve_oid().has_value());
            result.test_is_true("EC_Group is considered valid", group.verify_group(this->rng(), true));
            result.test_is_true("EC_Group is not considered explicit encoding", !group.used_explicit_encoding());

            result.test_sz_eq("EC_Group has correct bit size", group.get_p().bits(), group.get_p_bits());
            result.test_sz_eq("EC_Group has byte size", group.get_p().bytes(), group.get_p_bytes());

            result.test_bn_eq("EC_Group has cofactor == 1", group.get_cofactor(), 1);

            const Botan::OID from_order = Botan::EC_Group::EC_group_identity_from_order(group.get_order());

            result.test_str_eq(
               "EC_group_identity_from_order works", from_order.to_string(), group.get_curve_oid().to_string());

            result.test_is_true("Same group is same", group == Botan::EC_Group::from_name(group_name));

            try {
               const Botan::EC_Group copy(group.get_curve_oid(),
                                          group.get_p(),
                                          group.get_a(),
                                          group.get_b(),
                                          group.get_g_x(),
                                          group.get_g_y(),
                                          group.get_order());

               result.test_is_true("Same group is same even with copy", group == copy);
            } catch(Botan::Invalid_Argument&) {}

            const auto group_der_oid = group.DER_encode();
            const Botan::EC_Group group_via_oid(group_der_oid);
            result.test_is_true("EC_Group via OID is not considered explicit encoding",
                                !group_via_oid.used_explicit_encoding());

            const auto group_der_explicit = group.DER_encode(Botan::EC_Group_Encoding::Explicit);
            const Botan::EC_Group group_via_explicit(group_der_explicit);
            result.test_is_true("EC_Group via explicit DER is considered explicit encoding",
                                group_via_explicit.used_explicit_encoding());

            if(group.a_is_minus_3()) {
               result.test_bn_eq("Group A equals -3", group.get_a(), group.get_p() - 3);
            } else {
               result.test_bn_ne("Group " + group_name + " A does not equal -3", group.get_a(), group.get_p() - 3);
            }

            if(group.a_is_zero()) {
               result.test_bn_eq("Group A is zero", group.get_a(), BigInt(0));
            } else {
               result.test_bn_ne("Group " + group_name + " A does not equal zero", group.get_a(), BigInt(0));
            }

   #if defined(BOTAN_HAS_LEGACY_EC_POINT)
            const auto pt_mult_by_order = group.get_base_point() * group.get_order();
            result.test_is_true("Multiplying point by the order results in zero point", pt_mult_by_order.is_zero());

            // get a valid point
            Botan::EC_Point p = group.get_base_point() * this->rng().next_nonzero_byte();

            // get a copy
            Botan::EC_Point q = p;

            p.randomize_repr(this->rng());
            q.randomize_repr(this->rng());

            result.test_bn_eq("affine x after copy", p.get_affine_x(), q.get_affine_x());
            result.test_bn_eq("affine y after copy", p.get_affine_y(), q.get_affine_y());

            q.force_affine();

            result.test_bn_eq("affine x after copy", p.get_affine_x(), q.get_affine_x());
            result.test_bn_eq("affine y after copy", p.get_affine_y(), q.get_affine_y());

            test_ser_der(result, group);
            test_basic_math(result, group);
            test_point_swap(result, group);
            test_zeropoint(result, group);
   #endif

            result.end_timer();

            results.push_back(result);
         }

         return results;
      }

   private:
   #if defined(BOTAN_HAS_LEGACY_EC_POINT)

      void test_ser_der(Test::Result& result, const Botan::EC_Group& group) {
         // generate point
         const Botan::EC_Point pt = create_random_point(this->rng(), group);
         const Botan::EC_Point zero = group.zero_point();

         for(auto scheme : {Botan::EC_Point_Format::Uncompressed,
                            Botan::EC_Point_Format::Compressed,
                            Botan::EC_Point_Format::Hybrid}) {
            try {
               result.test_bin_eq("encoded/decode rt works", group.OS2ECP(pt.encode(scheme)).xy_bytes(), pt.xy_bytes());
            } catch(Botan::Exception& e) {
               result.test_failure("Failed to round trip encode a random point", e.what());
            }

            try {
               result.test_is_true("encoded/decode rt works", group.OS2ECP(zero.encode(scheme)).is_zero());
            } catch(Botan::Exception& e) {
               result.test_failure("Failed to round trip encode the identity element", e.what());
            }
         }
      }

      static void test_basic_math(Test::Result& result, const Botan::EC_Group& group) {
         const Botan::EC_Point& G = group.get_base_point();

         const auto G2 = G * 2;
         const auto G3 = G * 3;

         Botan::EC_Point p1 = G2;
         p1 += G;

         result.test_bin_eq("point addition", p1.xy_bytes(), G3.xy_bytes());

         p1 -= G2;

         result.test_bin_eq("point subtraction", p1.xy_bytes(), G.xy_bytes());

         // The scalar multiplication algorithm relies on this being true:
         try {
            const Botan::EC_Point zero_coords = group.point(0, 0);
            result.test_is_true("point (0,0) is not on the curve", !zero_coords.on_the_curve());
         } catch(Botan::Exception&) {
            result.test_success("point (0,0) is rejected");
         }
      }

      void test_point_swap(Test::Result& result, const Botan::EC_Group& group) {
         const Botan::EC_Point a(create_random_point(this->rng(), group));
         Botan::EC_Point b(create_random_point(this->rng(), group));
         b *= Botan::BigInt(this->rng(), 20);

         Botan::EC_Point c(a);
         Botan::EC_Point d(b);

         d.swap(c);
         result.test_bin_eq("swap correct", a.xy_bytes(), d.xy_bytes());
         result.test_bin_eq("swap correct", b.xy_bytes(), c.xy_bytes());
      }

      static void test_zeropoint(Test::Result& result, const Botan::EC_Group& group) {
         Botan::EC_Point zero = group.zero_point();

         result.test_throws("Zero point throws", "Cannot convert zero point to affine", [&]() { zero.get_affine_x(); });
         result.test_throws("Zero point throws", "Cannot convert zero point to affine", [&]() { zero.get_affine_y(); });

         const Botan::EC_Point p1 = group.get_base_point() * 2;

         result.test_is_true("point is on the curve", p1.on_the_curve());
         result.test_is_true("point is not zero", !p1.is_zero());

         Botan::EC_Point p2 = p1;
         p2 -= p1;

         result.test_is_true("p - q with q = p results in zero", p2.is_zero());

         const Botan::EC_Point minus_p1 = -p1;
         result.test_is_true("point is on the curve", minus_p1.on_the_curve());
         const Botan::EC_Point shouldBeZero = p1 + minus_p1;
         result.test_is_true("point is on the curve", shouldBeZero.on_the_curve());
         result.test_is_true("point is zero", shouldBeZero.is_zero());

         result.test_bn_eq("minus point x", minus_p1.get_affine_x(), p1.get_affine_x());
         result.test_bn_eq("minus point y", minus_p1.get_affine_y(), group.get_p() - p1.get_affine_y());

         result.test_is_true("zero point is zero", zero.is_zero());
         result.test_is_true("zero point is on the curve", zero.on_the_curve());
         result.test_bin_eq("addition of zero does nothing", p1.xy_bytes(), (p1 + zero).xy_bytes());
         result.test_bin_eq("addition of zero does nothing", p1.xy_bytes(), (zero + p1).xy_bytes());
         result.test_bin_eq("addition of zero does nothing", p1.xy_bytes(), (p1 - zero).xy_bytes());
         result.test_is_true("zero times anything is the zero point", (zero * 39193).is_zero());

         for(auto scheme : {Botan::EC_Point_Format::Uncompressed,
                            Botan::EC_Point_Format::Compressed,
                            Botan::EC_Point_Format::Hybrid}) {
            const std::vector<uint8_t> v = zero.encode(scheme);
            result.test_is_true("encoded/decode rt works", group.OS2ECP(v).is_zero());
         }
      }
   #endif
};

BOTAN_REGISTER_TEST("pubkey", "ec_group", EC_Group_Tests);

Test::Result test_decoding_with_seed() {
   Test::Result result("Decode EC_Group with seed");

   try {
      if(Botan::EC_Group::supports_named_group("secp384r1")) {
         const auto secp384r1 = Botan::EC_Group::from_name("secp384r1");
         const auto secp384r1_with_seed =
            Botan::EC_Group::from_PEM(Test::read_data_file("x509/ecc/secp384r1_seed.pem"));
         result.test_is_true("decoding worked", secp384r1_with_seed.initialized());
         result.test_bn_eq("P-384 prime", secp384r1_with_seed.get_p(), secp384r1.get_p());
      }
   } catch(Botan::Exception& e) {
      result.test_failure(e.what());
   }

   return result;
}

Test::Result test_mixed_points() {
   Test::Result result("Mixed Point Arithmetic");

   if(Botan::EC_Group::supports_named_group("secp256r1") && Botan::EC_Group::supports_named_group("secp384r1")) {
      const auto secp256r1 = Botan::EC_Group::from_name("secp256r1");
      const auto secp384r1 = Botan::EC_Group::from_name("secp384r1");

   #if defined(BOTAN_HAS_LEGACY_EC_POINT)
      const Botan::EC_Point& G256 = secp256r1.get_base_point();
      const Botan::EC_Point& G384 = secp384r1.get_base_point();

      result.test_throws("Mixing points from different groups", [&] { const Botan::EC_Point p = G256 + G384; });
   #endif

      const auto p1 = Botan::EC_AffinePoint::generator(secp256r1);
      const auto p2 = Botan::EC_AffinePoint::generator(secp384r1);
      result.test_throws("Mixing points from different groups", [&] { auto p3 = p1.add(p2); });
   }

   return result;
}

class ECC_Unit_Tests final : public Test {
   public:
      std::vector<Test::Result> run() override {
         std::vector<Test::Result> results;

         results.push_back(test_decoding_with_seed());
         results.push_back(test_mixed_points());

         return results;
      }
};

BOTAN_REGISTER_TEST("pubkey", "ecc_unit", ECC_Unit_Tests);

class EC_Group_Registration_Tests final : public Test {
   public:
      std::vector<Test::Result> run() override {
         std::vector<Test::Result> results;

         if(Botan::EC_Group::supports_application_specific_group()) {
            results.push_back(test_ecc_registration());
            results.push_back(test_ec_group_from_params());
            results.push_back(test_ec_group_bad_registration());
            results.push_back(test_ec_group_duplicate_orders());
            results.push_back(test_ec_group_registration_with_custom_oid());
            results.push_back(test_ec_group_unregistration());
            results.push_back(test_supports_named_group_with_registration());
         }

         return results;
      }

   private:
      Test::Result test_ecc_registration() {
         Test::Result result("ECC registration");

         // numsp256d1
         const Botan::BigInt p("0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF43");
         const Botan::BigInt a("0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF40");
         const Botan::BigInt b("0x25581");
         const Botan::BigInt order("0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFE43C8275EA265C6020AB20294751A825");

         const Botan::BigInt g_x("0x01");
         const Botan::BigInt g_y("0x696F1853C1E466D7FC82C96CCEEEDD6BD02C2F9375894EC10BF46306C2B56C77");

         const Botan::OID oid("1.3.6.1.4.1.25258.4.1");

         // Creating this object implicitly registers the curve for future use ...
         const Botan::EC_Group reg_group(oid, p, a, b, g_x, g_y, order);

         auto group = Botan::EC_Group::from_OID(oid);

         result.test_bn_eq("Group registration worked", group.get_p(), p);

         // TODO(Botan4) this could change to == Generic
         result.test_is_true("Group is not pcurve", group.engine() != Botan::EC_Group_Engine::Optimized);

         return result;
      }

      Test::Result test_ec_group_from_params() {
         Test::Result result("EC_Group from params");

         Botan::EC_Group::clear_registered_curve_data();

         // secp256r1
         const Botan::BigInt p("0xFFFFFFFF00000001000000000000000000000000FFFFFFFFFFFFFFFFFFFFFFFF");
         const Botan::BigInt a("0xFFFFFFFF00000001000000000000000000000000FFFFFFFFFFFFFFFFFFFFFFFC");
         const Botan::BigInt b("0x5AC635D8AA3A93E7B3EBBD55769886BC651D06B0CC53B0F63BCE3C3E27D2604B");

         const Botan::BigInt g_x("0x6B17D1F2E12C4247F8BCE6E563A440F277037D812DEB33A0F4A13945D898C296");
         const Botan::BigInt g_y("0x4FE342E2FE1A7F9B8EE7EB4A7C0F9E162BCE33576B315ECECBB6406837BF51F5");
         const Botan::BigInt order("0xFFFFFFFF00000000FFFFFFFFFFFFFFFFBCE6FAADA7179E84F3B9CAC2FC632551");

         const Botan::OID oid("1.2.840.10045.3.1.7");

         // This uses the deprecated constructor to verify we dedup even without an OID
         // This whole test can be removed once explicit curve support is removed
         const Botan::EC_Group reg_group(p, a, b, g_x, g_y, order, 1);
         result.test_is_true("Group has correct OID", reg_group.get_curve_oid() == oid);

         return result;
      }

      Test::Result test_ec_group_bad_registration() {
         Test::Result result("EC_Group registering non-match");

         Botan::EC_Group::clear_registered_curve_data();

         // secp256r1 params except with a bad B param
         const Botan::BigInt p("0xFFFFFFFF00000001000000000000000000000000FFFFFFFFFFFFFFFFFFFFFFFF");
         const Botan::BigInt a("0xFFFFFFFF00000001000000000000000000000000FFFFFFFFFFFFFFFFFFFFFFFC");
         const Botan::BigInt b("0x5AC635D8AA3A93E7B3EBBD55769886BC651D06B0CC53B0F63BCE3C3E27D2604C");

         const Botan::BigInt g_x("0x6B17D1F2E12C4247F8BCE6E563A440F277037D812DEB33A0F4A13945D898C296");
         const Botan::BigInt g_y("0x4FE342E2FE1A7F9B8EE7EB4A7C0F9E162BCE33576B315ECECBB6406837BF51F5");
         const Botan::BigInt order("0xFFFFFFFF00000000FFFFFFFFFFFFFFFFBCE6FAADA7179E84F3B9CAC2FC632551");

         const Botan::OID oid("1.2.840.10045.3.1.7");

         try {
            const Botan::EC_Group reg_group(oid, p, a, b, g_x, g_y, order);
            result.test_failure("Should have failed");
         } catch(Botan::Invalid_Argument&) {
            result.test_success("Got expected exception");
         }

         return result;
      }

      Test::Result test_ec_group_duplicate_orders() {
         Test::Result result("EC_Group with duplicate group order");

         Botan::EC_Group::clear_registered_curve_data();

         // secp256r1
         const Botan::BigInt p("0xFFFFFFFF00000001000000000000000000000000FFFFFFFFFFFFFFFFFFFFFFFF");
         const Botan::BigInt a("0xFFFFFFFF00000001000000000000000000000000FFFFFFFFFFFFFFFFFFFFFFFC");
         const Botan::BigInt b("0x5AC635D8AA3A93E7B3EBBD55769886BC651D06B0CC53B0F63BCE3C3E27D2604B");

         const Botan::BigInt g_x("0x6B17D1F2E12C4247F8BCE6E563A440F277037D812DEB33A0F4A13945D898C296");
         const Botan::BigInt g_y("0x4FE342E2FE1A7F9B8EE7EB4A7C0F9E162BCE33576B315ECECBB6406837BF51F5");
         const Botan::BigInt order("0xFFFFFFFF00000000FFFFFFFFFFFFFFFFBCE6FAADA7179E84F3B9CAC2FC632551");

         const Botan::OID oid("1.3.6.1.4.1.25258.100.0");  // some other random OID

         const Botan::EC_Group reg_group(oid, p, a, b, g_x, g_y, order);
         result.test_success("Registration success");
         result.test_is_true("Group has correct OID", reg_group.get_curve_oid() == oid);

         // We can now get it by OID:
         const auto hc_group = Botan::EC_Group::from_OID(oid);
         result.test_is_true("Group has correct OID", hc_group.get_curve_oid() == oid);

         // Existing secp256r1 unmodified:
         const Botan::OID secp160r1("1.2.840.10045.3.1.7");
         const auto other_group = Botan::EC_Group::from_OID(secp160r1);
         result.test_is_true("Group has correct OID", other_group.get_curve_oid() == secp160r1);

         return result;
      }

      Test::Result test_ec_group_registration_with_custom_oid() {
         Test::Result result("EC_Group registration of standard group with custom OID");

         Botan::EC_Group::clear_registered_curve_data();

         const Botan::OID secp256r1_oid("1.2.840.10045.3.1.7");
         const auto secp256r1 = Botan::EC_Group::from_OID(secp256r1_oid);
         result.test_is_true("Group has correct OID", secp256r1.get_curve_oid() == secp256r1_oid);

         const Botan::OID custom_oid("1.3.6.1.4.1.25258.100.99");  // some other random OID

         Botan::OID::register_oid(custom_oid, "secp256r1");

         const Botan::EC_Group reg_group(custom_oid,
                                         secp256r1.get_p(),
                                         secp256r1.get_a(),
                                         secp256r1.get_b(),
                                         secp256r1.get_g_x(),
                                         secp256r1.get_g_y(),
                                         secp256r1.get_order());

         result.test_success("Registration success");
         result.test_is_true("Group has correct OID", reg_group.get_curve_oid() == custom_oid);

         // We can now get it by OID:
         result.test_is_true("Group has correct OID",
                             Botan::EC_Group::from_OID(custom_oid).get_curve_oid() == custom_oid);

         // In the current data model of EC_Group there is a 1:1 OID:group, so these
         // have distinct underlying data
         result.test_is_true("Groups have different inner data pointers", reg_group._data() != secp256r1._data());

   #if defined(BOTAN_HAS_PCURVES_SECP256R1)
         // However we should have gotten a pcurves out of the deal *and* it
         // should be the exact same shared_ptr as the official curve

         result.test_enum_eq("Group is pcurves based", reg_group.engine(), Botan::EC_Group_Engine::Optimized);

         try {
            const auto& pcurve = reg_group._data()->pcurve();
            result.test_is_true("Group with custom OID got the same pcurve pointer",
                                &pcurve == &secp256r1._data()->pcurve());
         } catch(...) {
            result.test_failure("Group with custom OID did not get a pcurve pointer");
         }
   #endif

         return result;
      }

      Test::Result test_supports_named_group_with_registration() {
         Test::Result result("EC_Group::supports_named_group with custom registration");

         Botan::EC_Group::clear_registered_curve_data();

         result.test_is_false("Unknown name is not supported",
                              Botan::EC_Group::supports_named_group("not_a_real_curve_name_xyz"));

         const Botan::OID custom_oid("1.3.6.1.4.1.25258.4.9000");
         const std::string custom_name = "goku-curve";  // very strong

         Botan::OID::register_oid(custom_oid, custom_name);

         result.test_is_false("Mapped OID without registered EC_Group is not supported",
                              Botan::EC_Group::supports_named_group(custom_name));

         const Botan::BigInt p("0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF43");
         const Botan::BigInt a("0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF40");
         const Botan::BigInt b("0x25581");
         const Botan::BigInt order("0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFE43C8275EA265C6020AB20294751A825");
         const Botan::BigInt g_x("0x01");
         const Botan::BigInt g_y("0x696F1853C1E466D7FC82C96CCEEEDD6BD02C2F9375894EC10BF46306C2B56C77");

         const Botan::EC_Group reg_group(custom_oid, p, a, b, g_x, g_y, order);

         result.test_is_true("After registration the custom name is supported",
                             Botan::EC_Group::supports_named_group(custom_name));

         const auto resolved = Botan::EC_Group::from_name(custom_name);
         result.test_is_true("from_name resolves to the registered OID", resolved.get_curve_oid() == custom_oid);

         result.test_is_false("known_named_groups still does not include custom name",
                              Botan::EC_Group::known_named_groups().contains(custom_name));

         result.test_is_true("Unregistering removes support for the custom name",
                             Botan::EC_Group::unregister(custom_oid));
         result.test_is_false("After unregister the custom name is not supported",
                              Botan::EC_Group::supports_named_group(custom_name));

         return result;
      }

      Test::Result test_ec_group_unregistration() {
         Test::Result result("EC_Group unregistration of group");

         Botan::EC_Group::clear_registered_curve_data();

         const Botan::OID secp256r1_oid("1.2.840.10045.3.1.7");
         const auto secp256r1 = Botan::EC_Group::from_OID(secp256r1_oid);
         const Botan::OID custom_oid("1.3.6.1.4.1.25258.100.99");
         Botan::OID::register_oid(custom_oid, "secp256r1");

         const Botan::EC_Group reg_group(custom_oid,
                                         secp256r1.get_p(),
                                         secp256r1.get_a(),
                                         secp256r1.get_b(),
                                         secp256r1.get_g_x(),
                                         secp256r1.get_g_y(),
                                         secp256r1.get_order());

         const Botan::EC_Group group_from_oid = Botan::EC_Group::from_OID(custom_oid);

         result.test_is_true("Internal group is unregistered", Botan::EC_Group::unregister(secp256r1_oid));
         result.test_is_false("Unregistering internal group again does nothing",
                              Botan::EC_Group::unregister(secp256r1_oid));
         result.test_is_true("User defined group is unregistered", Botan::EC_Group::unregister(custom_oid));
         result.test_is_false("Unregistering user defined group again does nothing",
                              Botan::EC_Group::unregister(custom_oid));

         try {
            Botan::EC_Group::from_OID(custom_oid);
            result.test_failure("Should have failed");
         } catch(Botan::Invalid_Argument&) {
            result.test_success("Got expected exception");
         }

         result.test_is_true("Group can still be accessed", reg_group.get_curve_oid() == custom_oid);
         result.test_is_true("Group has correct p parameter", reg_group.get_p() == secp256r1.get_p());
         result.test_is_true("Group has correct a parameter", reg_group.get_a() == secp256r1.get_a());
         result.test_is_true("Group has correct b parameter", reg_group.get_b() == secp256r1.get_b());
         result.test_is_true("Group has correct g_x parameter", reg_group.get_g_x() == secp256r1.get_g_x());
         result.test_is_true("Group has correct g_y parameter", reg_group.get_g_y() == secp256r1.get_g_y());
         result.test_is_true("Group has correct order parameter", reg_group.get_order() == secp256r1.get_order());

   #if defined(BOTAN_HAS_ECDSA)
         std::unique_ptr<Botan::RandomNumberGenerator> rng = Test::new_rng("test_ec_group_unregistration");
         std::unique_ptr<Botan::Private_Key> key = Botan::create_ec_private_key("ECDSA", group_from_oid, *rng);
         result.test_success("Can still use group to create a key");
         result.test_is_true("Key was created correctly", key->check_key(*rng, true));
   #endif

         // TODO(Botan4) remove this when OIDs lose internal nullability
         try {
            const Botan::OID empty_oid("");
            Botan::EC_Group::unregister(empty_oid);
            result.test_failure("Should have failed");
         } catch(Botan::Invalid_Argument&) {
            result.test_success("Got expected exception");
         }

         return result;
      }
};

BOTAN_REGISTER_SERIALIZED_TEST("pubkey", "ec_group_registration", EC_Group_Registration_Tests);

class EC_PointEnc_Tests final : public Test {
   public:
      std::vector<Test::Result> run() override {
         std::vector<Test::Result> results;

         auto& rng = Test::rng();

         for(const auto& group_id : Botan::EC_Group::known_named_groups()) {
            const auto group = Botan::EC_Group::from_name(group_id);

            Result result("EC_AffinePoint encoding " + group_id);

            result.start_timer();

            for(size_t trial = 0; trial != 100; ++trial) {
               const auto scalar = Botan::EC_Scalar::random(group, rng);
               const auto pt = Botan::EC_AffinePoint::g_mul(scalar, rng);

               const auto pt_u = pt.serialize_uncompressed();
               result.test_u8_eq("Expected uncompressed header", pt_u[0], 0x04);
               const size_t fe_bytes = (pt_u.size() - 1) / 2;
               const auto pt_c = pt.serialize_compressed();

               result.test_sz_eq("Expected compressed size", pt_c.size(), 1 + fe_bytes);
               const uint8_t expected_c_header = (pt_u[pt_u.size() - 1] % 2 == 0) ? 0x02 : 0x03;
               result.test_u8_eq("Expected compressed header", pt_c[0], expected_c_header);

               result.test_bin_eq(
                  "Expected compressed x", std::span{pt_c}.subspan(1), std::span{pt_u}.subspan(1, fe_bytes));

               if(auto d_pt_u = Botan::EC_AffinePoint::deserialize(group, pt_u)) {
                  result.test_bin_eq(
                     "Deserializing uncompressed returned correct point", d_pt_u->serialize_uncompressed(), pt_u);
               } else {
                  result.test_failure("Failed to deserialize uncompressed point");
               }

               if(auto d_pt_c = Botan::EC_AffinePoint::deserialize(group, pt_c)) {
                  result.test_bin_eq(
                     "Deserializing compressed returned correct point", d_pt_c->serialize_uncompressed(), pt_u);
               } else {
                  result.test_failure("Failed to deserialize compressed point");
               }

               const auto neg_pt_c = [&]() {
                  auto x = pt_c;
                  x[0] ^= 0x01;
                  return x;
               }();

               if(auto d_neg_pt_c = Botan::EC_AffinePoint::deserialize(group, neg_pt_c)) {
                  result.test_bin_eq("Deserializing compressed with inverted header returned negated point",
                                     d_neg_pt_c->serialize_uncompressed(),
                                     pt.negate().serialize_uncompressed());
               } else {
                  result.test_failure("Failed to deserialize compressed point");
               }
            }

            result.end_timer();

            results.push_back(result);
         }

         return results;
      }
};

BOTAN_REGISTER_TEST("pubkey", "ec_point_enc", EC_PointEnc_Tests);

class EC_Point_Arithmetic_Tests final : public Test {
   public:
      std::vector<Test::Result> run() override {
         std::vector<Test::Result> results;

         auto& rng = Test::rng();

         for(const auto& group_id : Botan::EC_Group::known_named_groups()) {
            const auto group = Botan::EC_Group::from_name(group_id);

            Result result("EC_AffinePoint arithmetic " + group_id);

            result.start_timer();

            const auto one = Botan::EC_Scalar::one(group);
            const auto zero = one - one;  // NOLINT(*-redundant-expression)
            const auto g = Botan::EC_AffinePoint::generator(group);
            const auto g_bytes = g.serialize_uncompressed();

            const auto id = Botan::EC_AffinePoint::g_mul(zero, rng);
            result.test_is_true("g*zero is point at identity", id.is_identity());

            const auto id2 = id.add(id);
            result.test_is_true("identity plus itself is identity", id2.is_identity());

            const auto g_one = Botan::EC_AffinePoint::g_mul(one, rng);
            result.test_bin_eq("g*one == generator", g_one.serialize_uncompressed(), g_bytes);

            const auto g_plus_id = g_one.add(id);
            result.test_bin_eq("g + id == g", g_plus_id.serialize_uncompressed(), g_bytes);

            const auto id_plus_g = id.add(g_one);
            result.test_bin_eq("id + g == g", id_plus_g.serialize_uncompressed(), g_bytes);

            const auto g_neg_one = Botan::EC_AffinePoint::g_mul(one.negate(), rng);

            const auto id_from_g = g_one.add(g_neg_one);
            result.test_is_true("g - g is identity", id_from_g.is_identity());

            const auto g_two = Botan::EC_AffinePoint::g_mul(one + one, rng);
            const auto g_plus_g = g_one.add(g_one);
            result.test_bin_eq("2*g == g+g", g_two.serialize_uncompressed(), g_plus_g.serialize_uncompressed());

            result.test_is_true("Scalar::zero is zero", zero.is_zero());
            result.test_is_true("(zero+zero) is zero", (zero + zero).is_zero());
            result.test_is_true("(zero*zero) is zero", (zero * zero).is_zero());
            result.test_is_true("(zero-zero) is zero", (zero - zero).is_zero());  // NOLINT(*-redundant-expression)

            const auto neg_zero = zero.negate();
            result.test_is_true("zero.negate() is zero", neg_zero.is_zero());

            result.test_is_true("(zero+nz) is zero", (zero + neg_zero).is_zero());
            result.test_is_true("(nz+nz) is zero", (neg_zero + neg_zero).is_zero());
            result.test_is_true("(nz+zero) is zero", (neg_zero + zero).is_zero());

            result.test_is_true("Scalar::one is not zero", !one.is_zero());
            result.test_is_true("(one-one) is zero", (one - one).is_zero());  // NOLINT(*-redundant-expression)
            result.test_is_true("(one+one.negate()) is zero", (one + one.negate()).is_zero());
            result.test_is_true("(one.negate()+one) is zero", (one.negate() + one).is_zero());

            for(size_t i = 0; i != 16; ++i) {
               const auto pt = Botan::EC_AffinePoint::g_mul(Botan::EC_Scalar::random(group, rng), rng);

               const auto a = Botan::EC_Scalar::random(group, rng);
               const auto b = Botan::EC_Scalar::random(group, rng);
               const auto c = a + b;

               const auto Pa = pt.mul(a, rng);
               const auto Pb = pt.mul(b, rng);
               const auto Pc = pt.mul(c, rng);

               const auto Pc_bytes = Pc.serialize_uncompressed();

               const auto Pab = Pa.add(Pb);
               result.test_bin_eq("Pa + Pb == Pc", Pab.serialize_uncompressed(), Pc_bytes);

               const auto Pba = Pb.add(Pa);
               result.test_bin_eq("Pb + Pa == Pc", Pba.serialize_uncompressed(), Pc_bytes);
            }

            for(size_t i = 0; i != 64; ++i) {
               auto h = [&]() {
                  const auto s = [&]() {
                     if(i == 0) {
                        // Test the identity case
                        return Botan::EC_Scalar(zero);
                     } else if(i <= 32) {
                        // Test cases where the two points have a linear relation
                        std::vector<uint8_t> sbytes(group.get_order_bytes());
                        sbytes[sbytes.size() - 1] = static_cast<uint8_t>((i + 1) / 2);
                        auto si = Botan::EC_Scalar::deserialize(group, sbytes).value();
                        if(i % 2 == 0) {
                           return si;
                        } else {
                           return si.negate();
                        }
                     } else {
                        return Botan::EC_Scalar::random(group, rng);
                     }
                  }();
                  auto x = Botan::EC_AffinePoint::g_mul(s, rng);
                  return x;
               }();

               const auto s1 = Botan::EC_Scalar::random(group, rng);
               const auto s2 = Botan::EC_Scalar::random(group, rng);

               const Botan::EC_Group::Mul2Table mul2_table(h);

               const auto ref = Botan::EC_AffinePoint::g_mul(s1, rng).add(h.mul(s2, rng));

               if(auto mul2pt = mul2_table.mul2_vartime(s1, s2)) {
                  result.test_bin_eq("ref == mul2t", ref.serialize_uncompressed(), mul2pt->serialize_uncompressed());
               } else {
                  result.test_is_true("ref is identity", ref.is_identity());
               }
            }

            result.end_timer();

            results.push_back(result);
         }

         return results;
      }
};

BOTAN_REGISTER_TEST("pubkey", "ec_point_arith", EC_Point_Arithmetic_Tests);

   #if defined(BOTAN_HAS_ECDSA)

class ECC_Invalid_Key_Tests final : public Text_Based_Test {
   public:
      ECC_Invalid_Key_Tests() : Text_Based_Test("pubkey/ecc_invalid.vec", "SubjectPublicKey") {}

      bool clear_between_callbacks() const override { return false; }

      Test::Result run_one_test(const std::string& /*header*/, const VarMap& vars) override {
         Test::Result result("ECC invalid keys");

         const std::string encoded = vars.get_req_str("SubjectPublicKey");
         Botan::DataSource_Memory key_data(Botan::hex_decode(encoded));

         try {
            auto key = Botan::X509::load_key(key_data);
            result.test_is_false("public key fails check", key->check_key(this->rng(), false));
         } catch(Botan::Decoding_Error&) {
            result.test_success("Decoding invalid ECC key results in decoding error exception");
         }

         return result;
      }
};

BOTAN_REGISTER_TEST("pubkey", "ecc_invalid", ECC_Invalid_Key_Tests);

   #endif

#endif

}  // namespace

}  // namespace Botan_Tests

randombit / botan / 25457312714

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