20579846577

Committed 29 Dec 2025 06:24PM UTC coverage: 90.415% (+0.2%) from 90.243%

Build # 20579846577

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Merge pull request #5167 from randombit/jack/src-size-reductions

Changes to reduce unnecessary inclusions

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/src/tests/test_ecc_pointmul.cpp

/*
* (C) 2014,2015,2019 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/ec_group.h>
   #include <botan/rng.h>
   #include <botan/internal/fmt.h>
#endif

namespace Botan_Tests {

namespace {

#if defined(BOTAN_HAS_ECC_GROUP)

class ECC_Basepoint_Mul_Tests final : public Text_Based_Test {
   public:
      ECC_Basepoint_Mul_Tests() : Text_Based_Test("pubkey/ecc_base_point_mul.vec", "k,P") {}

      bool skip_this_test(const std::string& group_id, const VarMap& /*vars*/) override {
         return !Botan::EC_Group::supports_named_group(group_id);
      }

      Test::Result run_one_test(const std::string& group_id, const VarMap& vars) override {
         Test::Result result("ECC base point multiply " + group_id);

         const auto k_bytes = vars.get_req_bin("k");
         const auto P_bytes = vars.get_req_bin("P");

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

         const Botan::BigInt k(k_bytes);

   #if defined(BOTAN_HAS_LEGACY_EC_POINT)
         const auto pt = group.OS2ECP(P_bytes);
         const Botan::EC_Point p1 = group.get_base_point() * k;
         result.test_eq("EC_Point Montgomery ladder", p1.encode(Botan::EC_Point_Format::Uncompressed), P_bytes);
   #endif

         const auto scalar = Botan::EC_Scalar::from_bigint(group, k);
         const auto apg = Botan::EC_AffinePoint::g_mul(scalar, this->rng());
         result.test_eq("AffinePoint::g_mul", apg.serialize_uncompressed(), P_bytes);

         const auto ag = Botan::EC_AffinePoint::generator(group);
         const auto ap = ag.mul(scalar, this->rng());
         result.test_eq("AffinePoint::mul", ap.serialize_uncompressed(), P_bytes);

         return result;
      }
};

BOTAN_REGISTER_TEST("pubkey", "ecc_basemul", ECC_Basepoint_Mul_Tests);

class ECC_Varpoint_Mul_Tests final : public Text_Based_Test {
   public:
      ECC_Varpoint_Mul_Tests() : Text_Based_Test("pubkey/ecc_var_point_mul.vec", "P,k,Z") {}

      bool skip_this_test(const std::string& group_id, const VarMap& /*vars*/) override {
         return !Botan::EC_Group::supports_named_group(group_id);
      }

      Test::Result run_one_test(const std::string& group_id, const VarMap& vars) override {
         Test::Result result("ECC var point multiply " + group_id);

         const auto p = vars.get_req_bin("P");
         const Botan::BigInt k = vars.get_req_bn("k");
         const auto z = vars.get_req_bin("Z");

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

   #if defined(BOTAN_HAS_LEGACY_EC_POINT)
         const Botan::EC_Point p1 = group.OS2ECP(p) * k;
         result.test_eq("EC_Point Montgomery ladder", p1.encode(Botan::EC_Point::Compressed), z);
   #endif

         const auto s_k = Botan::EC_Scalar::from_bigint(group, k);
         const auto apt = Botan::EC_AffinePoint::deserialize(group, p).value();
         const auto apt_k = apt.mul(s_k, this->rng());
         result.test_eq("p * k (AffinePoint)", apt_k.serialize_compressed(), z);

         const auto apt_k_neg = apt.negate().mul(s_k.negate(), this->rng());
         result.test_eq("-p * -k (AffinePoint)", apt_k_neg.serialize_compressed(), z);

         const auto neg_apt_neg_k = apt.mul(s_k.negate(), this->rng()).negate();
         result.test_eq("-(p * -k) (AffinePoint)", neg_apt_neg_k.serialize_compressed(), z);

         return result;
      }
};

BOTAN_REGISTER_TEST("pubkey", "ecc_varmul", ECC_Varpoint_Mul_Tests);

class ECC_Mul2_Tests final : public Text_Based_Test {
   public:
      ECC_Mul2_Tests() : Text_Based_Test("pubkey/ecc_var_point_mul2.vec", "P,x,Q,y,Z") {}

      bool skip_this_test(const std::string& group_id, const VarMap& /*vars*/) override {
         return !Botan::EC_Group::supports_named_group(group_id);
      }

      Test::Result run_one_test(const std::string& group_id, const VarMap& vars) override {
         Test::Result result("ECC mul2 " + group_id);

         const auto Z_bytes = vars.get_req_bin("Z");

         const auto check_px_qy = [&](const char* what,
                                      const Botan::EC_AffinePoint& p,
                                      const Botan::EC_Scalar& x,
                                      const Botan::EC_AffinePoint& q,
                                      const Botan::EC_Scalar& y,
                                      bool with_final_negation = false) {
            if(const auto z = Botan::EC_AffinePoint::mul_px_qy(p, x, q, y, rng())) {
               if(with_final_negation) {
                  result.test_eq(what, z->negate().serialize_compressed(), Z_bytes);
               } else {
                  result.test_eq(what, z->serialize_compressed(), Z_bytes);
               }
            } else {
               result.test_failure("EC_AffinePoint::mul_px_qy failed to produce a result");
            }

            // Now check the same using naive multiply and add:
            auto z = p.mul(x, rng()).add(q.mul(y, rng()));
            if(with_final_negation) {
               z = z.negate();
            }
            result.test_eq("p*x + q*y naive", z.serialize_compressed(), Z_bytes);
         };

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

         const auto p = Botan::EC_AffinePoint::deserialize(group, vars.get_req_bin("P")).value();
         const auto q = Botan::EC_AffinePoint::deserialize(group, vars.get_req_bin("Q")).value();
         const auto x = Botan::EC_Scalar::from_bigint(group, vars.get_req_bn("x"));
         const auto y = Botan::EC_Scalar::from_bigint(group, vars.get_req_bn("y"));

         const auto np = p.negate();
         const auto nq = q.negate();
         const auto nx = x.negate();
         const auto ny = y.negate();

         check_px_qy("p*x + q*y", p, x, q, y);
         check_px_qy("-p*-x + -q*-y", np, nx, nq, ny);
         check_px_qy("-(p*-x + q*-y)", p, nx, q, ny, true);
         check_px_qy("-(-p*x + -q*y)", np, x, nq, y, true);

         return result;
      }
};

BOTAN_REGISTER_TEST("pubkey", "ecc_mul2", ECC_Mul2_Tests);

class ECC_Mul2_Inf_Tests final : public Test {
   public:
      std::vector<Test::Result> run() override {
         std::vector<Test::Result> results;

         for(const auto& group_id : Botan::EC_Group::known_named_groups()) {
            Test::Result result("ECC mul2 inf " + group_id);

            const auto check_px_qy = [&](const char* what,
                                         const Botan::EC_AffinePoint& p,
                                         const Botan::EC_Scalar& x,
                                         const Botan::EC_AffinePoint& q,
                                         const Botan::EC_Scalar& y) {
               if(const auto z = Botan::EC_AffinePoint::mul_px_qy(p, x, q, y, rng())) {
                  result.test_failure(Botan::fmt("EC_AffinePoint::mul_px_qy {} unexpectedly produced a result", what));
               } else {
                  result.test_success(Botan::fmt("EC_AffinePoint::mul_px_qy {} returned nullopt as expected", what));
               }
            };

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

            const auto g = Botan::EC_AffinePoint::generator(group);

            // Choose some other random point z
            const auto z = g.mul(Botan::EC_Scalar::random(group, rng()), rng());

            const auto r = Botan::EC_Scalar::random(group, rng());
            const auto neg_r = r.negate();
            const auto neg_r2 = neg_r + neg_r;

            const auto zero = r - r;  // NOLINT(*-redundant-expression)
            result.confirm("Computed EC_Scalar is zero", zero.is_zero());

            const auto g2 = g.add(g);

            const auto id = Botan::EC_AffinePoint::identity(group);

            check_px_qy("0*g + r*id", g, zero, id, r);
            check_px_qy("0*id + r*id", id, zero, id, r);
            check_px_qy("0*g + 0*z", g, zero, z, zero);
            check_px_qy("r*g + -r*g", g, r, g, neg_r);
            check_px_qy("-r*g + r*g", g, neg_r, g, r);
            check_px_qy("r*g + r*-g", g, r, g.negate(), r);
            check_px_qy("r*g2 + -r2*g", g2, r, g, neg_r2);

            // Test 'zeroization' (explicit erasure of the scalar content)
            auto r2 = Botan::EC_Scalar::random(group, rng());
            result.confirm("random value is not zero", !r2.is_zero());
            r2.zeroize();
            result.confirm("value is zero", r2.is_zero());

            results.push_back(result);
         }

         return results;
      }
};

BOTAN_REGISTER_TEST("pubkey", "ecc_mul2_inf", ECC_Mul2_Inf_Tests);

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

         for(const auto& group_id : Botan::EC_Group::known_named_groups()) {
            Test::Result result("ECC addition " + group_id);

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

            const auto g = Botan::EC_AffinePoint::generator(group);
            result.test_eq("g is not the identity element", g.is_identity(), false);

            // Choose some other random point z
            const auto z = g.mul(Botan::EC_Scalar::random(group, rng()), rng());
            result.test_eq("z is not the identity element", z.is_identity(), false);

            const auto id = Botan::EC_AffinePoint::identity(group);
            result.test_eq("id is the identity element", id.is_identity(), true);

            const auto g_bytes = g.serialize_uncompressed();

            auto check_expr_is_g = [&](const char* msg, const Botan::EC_AffinePoint& pt) {
               result.test_eq(Botan::fmt("{} is g", msg), pt.serialize_uncompressed(), g_bytes);
            };

            const auto nz = z.negate();

            check_expr_is_g("g + id", g.add(id));
            check_expr_is_g("id + g", id.add(g));
            check_expr_is_g("g + id", g.add(id));
            check_expr_is_g("g + -id", g.add(id.negate()));
            check_expr_is_g("g + g + -g", g.add(g).add(g.negate()));
            check_expr_is_g("-id + g", id.negate().add(g));
            check_expr_is_g("z + g - z", z.add(g).add(nz));
            check_expr_is_g("z - z + g", z.add(nz).add(g));
            check_expr_is_g("z + z + g - z - z", z.add(z).add(g).add(nz).add(nz));
            check_expr_is_g("z + id + g + z - z - z", z.add(id).add(g).add(z).add(nz).add(nz));

            results.push_back(result);
         }

         return results;
      }
};

BOTAN_REGISTER_TEST("pubkey", "ecc_pt_addition", ECC_Point_Addition_Tests);

class ECC_Scalar_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);

            Test::Result result("ECC scalar arithmetic " + group_id);
            test_scalar_arith(result, group, rng);
            results.push_back(result);
         }
         return results;
      }

   private:
      void test_scalar_arith(Test::Result& result,
                             const Botan::EC_Group& group,
                             Botan::RandomNumberGenerator& rng) const {
         const auto one = Botan::EC_Scalar::one(group);
         const auto zero = one - one;  // NOLINT(*-redundant-expression)
         const auto two = one + one;

         const size_t order_bytes = group.get_order_bytes();

         const auto ser_zero = std::vector<uint8_t>(order_bytes);

         const auto ser_one = [=]() {
            auto b = ser_zero;
            BOTAN_ASSERT_NOMSG(b.size() > 1);
            b[b.size() - 1] = 1;
            return b;
         }();

         result.test_eq("Serialization of zero is expected value", zero.serialize(), ser_zero);
         result.test_eq("Serialization of one is expected value", one.serialize(), ser_one);

         result.test_eq("Zero is zero", zero.is_zero(), true);
         result.test_eq("Negation of zero is zero", zero.negate().is_zero(), true);
         result.test_eq("One is not zero", one.is_zero(), false);

         // Zero inverse is not mathematically correct, but works out for our purposes
         result.test_eq("Inverse of zero is zero", zero.invert().serialize(), ser_zero);
         result.test_eq("Inverse of one is one", one.invert().serialize(), ser_one);

         result.test_eq("Inverse (vt) of zero is zero", zero.invert_vartime().serialize(), ser_zero);
         result.test_eq("Inverse (vt) of one is one", one.invert_vartime().serialize(), ser_one);

         constexpr size_t test_iter = 128;

         for(size_t i = 0; i != test_iter; ++i) {
            const auto r = Botan::EC_Scalar::random(group, rng);

            // Negation and addition are inverses
            result.test_eq("r + -r == 0", (r + r.negate()).serialize(), ser_zero);

            // Serialization and deserialization are inverses
            const auto r_bytes = r.serialize();
            result.test_eq("Deserialization of r round trips",
                           Botan::EC_Scalar::deserialize(group, r_bytes).value().serialize(),
                           r_bytes);

            // Multiplication and inversion are inverses
            const auto r2 = r * r;
            const auto r_inv = r.invert();
            result.test_eq("r * r^-1 = 1", (r * r_inv).serialize(), ser_one);

            const auto r_inv_vt = r.invert_vartime();
            result.confirm("CT and variable time inversions produced same result", r_inv == r_inv_vt);
         }

         for(size_t i = 0; i != test_iter; ++i) {
            const auto a = Botan::EC_Scalar::random(group, rng);
            const auto b = Botan::EC_Scalar::random(group, rng);

            const auto ab = a * b;
            const auto a_inv = a.invert();
            const auto b_inv = b.invert();

            result.test_eq("a * b / b = a", (ab * b_inv).serialize(), a.serialize());
            result.test_eq("a * b / a = b", (ab * a_inv).serialize(), b.serialize());

            auto a_plus_b = a + b;
            result.test_eq("(a + b) - b == a", (a_plus_b - b).serialize(), a.serialize());
            result.test_eq("(a + b) - a == b", (a_plus_b - a).serialize(), b.serialize());
            result.test_eq("b - (a + b) == -a", (b - a_plus_b).serialize(), a.negate().serialize());
            result.test_eq("a - (a + b) == -b", (a - a_plus_b).serialize(), b.negate().serialize());
         }

         for(size_t i = 0; i != test_iter; ++i) {
            const auto a = Botan::EC_Scalar::random(group, rng);
            const auto b = Botan::EC_Scalar::random(group, rng);
            const auto c = Botan::EC_Scalar::random(group, rng);

            const auto ab_c = (a + b) * c;
            const auto ac_bc = a * c + b * c;

            result.test_eq("(a + b)*c == a * c + b * c", ab_c.serialize(), ac_bc.serialize());
         }

         for(size_t i = 0; i != test_iter; ++i) {
            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 c_bn = (a.to_bigint() * b.to_bigint());
            result.test_eq("matches BigInt", c.serialize(), (c_bn % group.get_order()).serialize(order_bytes));

            const auto c_wide_bytes = c_bn.serialize();
            result.test_lte("Expected size", c_wide_bytes.size(), 2 * order_bytes);

            const auto z = Botan::EC_Scalar::from_bytes_mod_order(group, c_wide_bytes);

            result.test_eq("from_bytes_mod_order", c.serialize(), z.serialize());
         }

         for(size_t i = 0; i != test_iter; ++i) {
            std::vector<uint8_t> r(2 * group.get_order_bytes());

            rng.randomize(r);

            const auto ref = Botan::BigInt::from_bytes(r) % group.get_order();

            const auto scalar = Botan::EC_Scalar::from_bytes_mod_order(group, r);

            result.test_eq("from_bytes_mod_order (random)", scalar.serialize(), ref.serialize(group.get_order_bytes()));
         }

         result.end_timer();
      }
};

BOTAN_REGISTER_TEST("pubkey", "ecc_scalar_arith", ECC_Scalar_Arithmetic_Tests);

#endif

}  // namespace

}  // namespace Botan_Tests

1	/*
2	* (C) 2014,2015,2019 Jack Lloyd
3	*
4	* Botan is released under the Simplified BSD License (see license.txt)
5	*/
6
7	#include "tests.h"
8
9	#if defined(BOTAN_HAS_ECC_GROUP)
10	#include <botan/bigint.h>
11	#include <botan/ec_group.h>
12	#include <botan/rng.h>
13	#include <botan/internal/fmt.h>
14	#endif
15
16	namespace Botan_Tests {
17
18	namespace {
19
20	#if defined(BOTAN_HAS_ECC_GROUP)
21
22	class ECC_Basepoint_Mul_Tests final : public Text_Based_Test {	×
23	public:
24	ECC_Basepoint_Mul_Tests() : Text_Based_Test("pubkey/ecc_base_point_mul.vec", "k,P") {}	2✔
25
26	bool skip_this_test(const std::string& group_id, const VarMap& /vars/) override {	535✔
27	return !Botan::EC_Group::supports_named_group(group_id);	535✔
28	}
29
30	Test::Result run_one_test(const std::string& group_id, const VarMap& vars) override {	535✔
31	Test::Result result("ECC base point multiply " + group_id);	535✔
32
33	const auto k_bytes = vars.get_req_bin("k");	535✔
34	const auto P_bytes = vars.get_req_bin("P");	535✔
35
36	const auto group = Botan::EC_Group::from_name(group_id);	535✔
37
38	const Botan::BigInt k(k_bytes);	535✔
39
40	#if defined(BOTAN_HAS_LEGACY_EC_POINT)
41	const auto pt = group.OS2ECP(P_bytes);	535✔
42	const Botan::EC_Point p1 = group.get_base_point() * k;	535✔
43	result.test_eq("EC_Point Montgomery ladder", p1.encode(Botan::EC_Point_Format::Uncompressed), P_bytes);	1,070✔
44	#endif
45
46	const auto scalar = Botan::EC_Scalar::from_bigint(group, k);	535✔
47	const auto apg = Botan::EC_AffinePoint::g_mul(scalar, this->rng());	535✔
48	result.test_eq("AffinePoint::g_mul", apg.serialize_uncompressed(), P_bytes);	1,070✔
49
50	const auto ag = Botan::EC_AffinePoint::generator(group);	535✔
51	const auto ap = ag.mul(scalar, this->rng());	535✔
52	result.test_eq("AffinePoint::mul", ap.serialize_uncompressed(), P_bytes);	1,070✔
53
54	return result;	1,070✔
55	}	1,605✔
56	};
57
58	BOTAN_REGISTER_TEST("pubkey", "ecc_basemul", ECC_Basepoint_Mul_Tests);
59
60	class ECC_Varpoint_Mul_Tests final : public Text_Based_Test {	×
61	public:
62	ECC_Varpoint_Mul_Tests() : Text_Based_Test("pubkey/ecc_var_point_mul.vec", "P,k,Z") {}	2✔
63
64	bool skip_this_test(const std::string& group_id, const VarMap& /vars/) override {	829✔
65	return !Botan::EC_Group::supports_named_group(group_id);	829✔
66	}
67
68	Test::Result run_one_test(const std::string& group_id, const VarMap& vars) override {	829✔
69	Test::Result result("ECC var point multiply " + group_id);	829✔
70
71	const auto p = vars.get_req_bin("P");	829✔
72	const Botan::BigInt k = vars.get_req_bn("k");	829✔
73	const auto z = vars.get_req_bin("Z");	829✔
74
75	const auto group = Botan::EC_Group::from_name(group_id);	829✔
76
77	#if defined(BOTAN_HAS_LEGACY_EC_POINT)
78	const Botan::EC_Point p1 = group.OS2ECP(p) * k;	1,658✔
79	result.test_eq("EC_Point Montgomery ladder", p1.encode(Botan::EC_Point::Compressed), z);	1,658✔
80	#endif
81
82	const auto s_k = Botan::EC_Scalar::from_bigint(group, k);	829✔
83	const auto apt = Botan::EC_AffinePoint::deserialize(group, p).value();	1,658✔
84	const auto apt_k = apt.mul(s_k, this->rng());	829✔
85	result.test_eq("p * k (AffinePoint)", apt_k.serialize_compressed(), z);	1,658✔
86
87	const auto apt_k_neg = apt.negate().mul(s_k.negate(), this->rng());	829✔
88	result.test_eq("-p * -k (AffinePoint)", apt_k_neg.serialize_compressed(), z);	1,658✔
89
90	const auto neg_apt_neg_k = apt.mul(s_k.negate(), this->rng()).negate();	829✔
91	result.test_eq("-(p * -k) (AffinePoint)", neg_apt_neg_k.serialize_compressed(), z);	1,658✔
92
93	return result;	1,658✔
94	}	2,487✔
95	};
96
97	BOTAN_REGISTER_TEST("pubkey", "ecc_varmul", ECC_Varpoint_Mul_Tests);
98
99	class ECC_Mul2_Tests final : public Text_Based_Test {	×
100	public:
101	ECC_Mul2_Tests() : Text_Based_Test("pubkey/ecc_var_point_mul2.vec", "P,x,Q,y,Z") {}	2✔
102
103	bool skip_this_test(const std::string& group_id, const VarMap& /vars/) override {	819✔
104	return !Botan::EC_Group::supports_named_group(group_id);	819✔
105	}
106
107	Test::Result run_one_test(const std::string& group_id, const VarMap& vars) override {	819✔
108	Test::Result result("ECC mul2 " + group_id);	819✔
109
110	const auto Z_bytes = vars.get_req_bin("Z");	819✔
111
112	const auto check_px_qy = [&](const char* what,	4,095✔
113	const Botan::EC_AffinePoint& p,
114	const Botan::EC_Scalar& x,
115	const Botan::EC_AffinePoint& q,
116	const Botan::EC_Scalar& y,
117	bool with_final_negation = false) {
118	if(const auto z = Botan::EC_AffinePoint::mul_px_qy(p, x, q, y, rng())) {	3,276✔
119	if(with_final_negation) {	3,276✔
120	result.test_eq(what, z->negate().serialize_compressed(), Z_bytes);	4,914✔
121	} else {
122	result.test_eq(what, z->serialize_compressed(), Z_bytes);	4,914✔
123	}
124	} else {
125	result.test_failure("EC_AffinePoint::mul_px_qy failed to produce a result");	×
126	}	×
127
128	// Now check the same using naive multiply and add:
129	auto z = p.mul(x, rng()).add(q.mul(y, rng()));	3,276✔
130	if(with_final_negation) {	3,276✔
131	z = z.negate();	1,638✔
132	}
133	result.test_eq("px + qy naive", z.serialize_compressed(), Z_bytes);	6,552✔
134	};	3,276✔
135
136	const auto group = Botan::EC_Group::from_name(group_id);	819✔
137
138	const auto p = Botan::EC_AffinePoint::deserialize(group, vars.get_req_bin("P")).value();	3,276✔
139	const auto q = Botan::EC_AffinePoint::deserialize(group, vars.get_req_bin("Q")).value();	3,276✔
140	const auto x = Botan::EC_Scalar::from_bigint(group, vars.get_req_bn("x"));	819✔
141	const auto y = Botan::EC_Scalar::from_bigint(group, vars.get_req_bn("y"));	819✔
142
143	const auto np = p.negate();	819✔
144	const auto nq = q.negate();	819✔
145	const auto nx = x.negate();	819✔
146	const auto ny = y.negate();	819✔
147
148	check_px_qy("px + qy", p, x, q, y);	819✔
149	check_px_qy("-p-x + -q-y", np, nx, nq, ny);	819✔
150	check_px_qy("-(p-x + q-y)", p, nx, q, ny, true);	819✔
151	check_px_qy("-(-px + -qy)", np, x, nq, y, true);	819✔
152
153	return result;	1,638✔
154	}	1,638✔
155	};
156
157	BOTAN_REGISTER_TEST("pubkey", "ecc_mul2", ECC_Mul2_Tests);
158
159	class ECC_Mul2_Inf_Tests final : public Test {	1✔
160	public:
161	std::vector<Test::Result> run() override {	1✔
162	std::vector<Test::Result> results;	1✔
163
164	for(const auto& group_id : Botan::EC_Group::known_named_groups()) {	29✔
165	Test::Result result("ECC mul2 inf " + group_id);	28✔
166
167	const auto check_px_qy = [&](const char* what,	224✔
168	const Botan::EC_AffinePoint& p,
169	const Botan::EC_Scalar& x,
170	const Botan::EC_AffinePoint& q,
171	const Botan::EC_Scalar& y) {
172	if(const auto z = Botan::EC_AffinePoint::mul_px_qy(p, x, q, y, rng())) {	196✔
173	result.test_failure(Botan::fmt("EC_AffinePoint::mul_px_qy {} unexpectedly produced a result", what));	×
174	} else {
175	result.test_success(Botan::fmt("EC_AffinePoint::mul_px_qy {} returned nullopt as expected", what));	392✔
176	}	196✔
177	};	196✔
178
179	const auto group = Botan::EC_Group::from_name(group_id);	28✔
180
181	const auto g = Botan::EC_AffinePoint::generator(group);	28✔
182
183	// Choose some other random point z
184	const auto z = g.mul(Botan::EC_Scalar::random(group, rng()), rng());	28✔
185
186	const auto r = Botan::EC_Scalar::random(group, rng());	28✔
187	const auto neg_r = r.negate();	28✔
188	const auto neg_r2 = neg_r + neg_r;	28✔
189
190	const auto zero = r - r; // NOLINT(*-redundant-expression)	28✔
191	result.confirm("Computed EC_Scalar is zero", zero.is_zero());	56✔
192
193	const auto g2 = g.add(g);	28✔
194
195	const auto id = Botan::EC_AffinePoint::identity(group);	28✔
196
197	check_px_qy("0g + rid", g, zero, id, r);	28✔
198	check_px_qy("0id + rid", id, zero, id, r);	28✔
199	check_px_qy("0g + 0z", g, zero, z, zero);	28✔
200	check_px_qy("rg + -rg", g, r, g, neg_r);	28✔
201	check_px_qy("-rg + rg", g, neg_r, g, r);	28✔
202	check_px_qy("rg + r-g", g, r, g.negate(), r);	28✔
203	check_px_qy("rg2 + -r2g", g2, r, g, neg_r2);	28✔
204
205	// Test 'zeroization' (explicit erasure of the scalar content)
206	auto r2 = Botan::EC_Scalar::random(group, rng());	28✔
207	result.confirm("random value is not zero", !r2.is_zero());	56✔
208	r2.zeroize();	28✔
209	result.confirm("value is zero", r2.is_zero());	56✔
210
211	results.push_back(result);	28✔
212	}	28✔
213
214	return results;	1✔
215	}	×
216	};
217
218	BOTAN_REGISTER_TEST("pubkey", "ecc_mul2_inf", ECC_Mul2_Inf_Tests);
219
220	class ECC_Point_Addition_Tests final : public Test {	1✔
221	public:
222	std::vector<Test::Result> run() override {	1✔
223	std::vector<Test::Result> results;	1✔
224
225	for(const auto& group_id : Botan::EC_Group::known_named_groups()) {	29✔
226	Test::Result result("ECC addition " + group_id);	28✔
227
228	const auto group = Botan::EC_Group::from_name(group_id);	28✔
229
230	const auto g = Botan::EC_AffinePoint::generator(group);	28✔
231	result.test_eq("g is not the identity element", g.is_identity(), false);	28✔
232
233	// Choose some other random point z
234	const auto z = g.mul(Botan::EC_Scalar::random(group, rng()), rng());	28✔
235	result.test_eq("z is not the identity element", z.is_identity(), false);	28✔
236
237	const auto id = Botan::EC_AffinePoint::identity(group);	28✔
238	result.test_eq("id is the identity element", id.is_identity(), true);	28✔
239
240	const auto g_bytes = g.serialize_uncompressed();	28✔
241
242	auto check_expr_is_g = [&](const char* msg, const Botan::EC_AffinePoint& pt) {	308✔
243	result.test_eq(Botan::fmt("{} is g", msg), pt.serialize_uncompressed(), g_bytes);	560✔
244	};	280✔
245
246	const auto nz = z.negate();	28✔
247
248	check_expr_is_g("g + id", g.add(id));	28✔
249	check_expr_is_g("id + g", id.add(g));	28✔
250	check_expr_is_g("g + id", g.add(id));	28✔
251	check_expr_is_g("g + -id", g.add(id.negate()));	28✔
252	check_expr_is_g("g + g + -g", g.add(g).add(g.negate()));	28✔
253	check_expr_is_g("-id + g", id.negate().add(g));	28✔
254	check_expr_is_g("z + g - z", z.add(g).add(nz));	28✔
255	check_expr_is_g("z - z + g", z.add(nz).add(g));	28✔
256	check_expr_is_g("z + z + g - z - z", z.add(z).add(g).add(nz).add(nz));	28✔
257	check_expr_is_g("z + id + g + z - z - z", z.add(id).add(g).add(z).add(nz).add(nz));	28✔
258
259	results.push_back(result);	28✔
260	}	56✔
261
262	return results;	1✔
263	}	×
264	};
265
266	BOTAN_REGISTER_TEST("pubkey", "ecc_pt_addition", ECC_Point_Addition_Tests);
267
268	class ECC_Scalar_Arithmetic_Tests final : public Test {	1✔
269	public:
270	std::vector<Test::Result> run() override {	1✔
271	std::vector<Test::Result> results;	1✔
272
273	auto& rng = Test::rng();	1✔
274
275	for(const auto& group_id : Botan::EC_Group::known_named_groups()) {	29✔
276	const auto group = Botan::EC_Group::from_name(group_id);	28✔
277
278	Test::Result result("ECC scalar arithmetic " + group_id);	28✔
279	test_scalar_arith(result, group, rng);	28✔
280	results.push_back(result);	28✔
281	}	28✔
282	return results;	1✔
283	}	×
284
285	private:
286	void test_scalar_arith(Test::Result& result,	28✔
287	const Botan::EC_Group& group,
288	Botan::RandomNumberGenerator& rng) const {
289	const auto one = Botan::EC_Scalar::one(group);	28✔
290	const auto zero = one - one; // NOLINT(*-redundant-expression)	28✔
291	const auto two = one + one;	28✔
292
293	const size_t order_bytes = group.get_order_bytes();	28✔
294
295	const auto ser_zero = std::vector<uint8_t>(order_bytes);	28✔
296
297	const auto ser_one = [=]() {	56✔
298	auto b = ser_zero;	28✔
299	BOTAN_ASSERT_NOMSG(b.size() > 1);	28✔
300	b[b.size() - 1] = 1;	28✔
301	return b;	28✔
302	}();	28✔
303
304	result.test_eq("Serialization of zero is expected value", zero.serialize(), ser_zero);	56✔
305	result.test_eq("Serialization of one is expected value", one.serialize(), ser_one);	56✔
306
307	result.test_eq("Zero is zero", zero.is_zero(), true);	28✔
308	result.test_eq("Negation of zero is zero", zero.negate().is_zero(), true);	56✔
309	result.test_eq("One is not zero", one.is_zero(), false);	28✔
310
311	// Zero inverse is not mathematically correct, but works out for our purposes
312	result.test_eq("Inverse of zero is zero", zero.invert().serialize(), ser_zero);	84✔
313	result.test_eq("Inverse of one is one", one.invert().serialize(), ser_one);	84✔
314
315	result.test_eq("Inverse (vt) of zero is zero", zero.invert_vartime().serialize(), ser_zero);	84✔
316	result.test_eq("Inverse (vt) of one is one", one.invert_vartime().serialize(), ser_one);	84✔
317
318	constexpr size_t test_iter = 128;	28✔
319
320	for(size_t i = 0; i != test_iter; ++i) {	3,612✔
321	const auto r = Botan::EC_Scalar::random(group, rng);	3,584✔
322
323	// Negation and addition are inverses
324	result.test_eq("r + -r == 0", (r + r.negate()).serialize(), ser_zero);	14,336✔
325
326	// Serialization and deserialization are inverses
327	const auto r_bytes = r.serialize();	3,584✔
328	result.test_eq("Deserialization of r round trips",	10,752✔
329	Botan::EC_Scalar::deserialize(group, r_bytes).value().serialize(),	10,752✔
330	r_bytes);
331
332	// Multiplication and inversion are inverses
333	const auto r2 = r * r;	3,584✔
334	const auto r_inv = r.invert();	3,584✔
335	result.test_eq("r * r^-1 = 1", (r * r_inv).serialize(), ser_one);	10,752✔
336
337	const auto r_inv_vt = r.invert_vartime();	3,584✔
338	result.confirm("CT and variable time inversions produced same result", r_inv == r_inv_vt);	7,168✔
339	}	7,168✔
340
341	for(size_t i = 0; i != test_iter; ++i) {	3,612✔
342	const auto a = Botan::EC_Scalar::random(group, rng);	3,584✔
343	const auto b = Botan::EC_Scalar::random(group, rng);	3,584✔
344
345	const auto ab = a * b;	3,584✔
346	const auto a_inv = a.invert();	3,584✔
347	const auto b_inv = b.invert();	3,584✔
348
349	result.test_eq("a * b / b = a", (ab * b_inv).serialize(), a.serialize());	10,752✔
350	result.test_eq("a * b / a = b", (ab * a_inv).serialize(), b.serialize());	10,752✔
351
352	auto a_plus_b = a + b;	3,584✔
353	result.test_eq("(a + b) - b == a", (a_plus_b - b).serialize(), a.serialize());	10,752✔
354	result.test_eq("(a + b) - a == b", (a_plus_b - a).serialize(), b.serialize());	10,752✔
355	result.test_eq("b - (a + b) == -a", (b - a_plus_b).serialize(), a.negate().serialize());	14,336✔
356	result.test_eq("a - (a + b) == -b", (a - a_plus_b).serialize(), b.negate().serialize());	14,336✔
357	}	3,584✔
358
359	for(size_t i = 0; i != test_iter; ++i) {	3,612✔
360	const auto a = Botan::EC_Scalar::random(group, rng);	3,584✔
361	const auto b = Botan::EC_Scalar::random(group, rng);	3,584✔
362	const auto c = Botan::EC_Scalar::random(group, rng);	3,584✔
363
364	const auto ab_c = (a + b) * c;	3,584✔
365	const auto ac_bc = a * c + b * c;	3,584✔
366
367	result.test_eq("(a + b)c == a c + b * c", ab_c.serialize(), ac_bc.serialize());	10,752✔
368	}	3,584✔
369
370	for(size_t i = 0; i != test_iter; ++i) {	3,612✔
371	const auto a = Botan::EC_Scalar::random(group, rng);	3,584✔
372	const auto b = Botan::EC_Scalar::random(group, rng);	3,584✔
373	const auto c = a * b;	3,584✔
374
375	const auto c_bn = (a.to_bigint() * b.to_bigint());	3,584✔
376	result.test_eq("matches BigInt", c.serialize(), (c_bn % group.get_order()).serialize(order_bytes));	14,336✔
377
378	const auto c_wide_bytes = c_bn.serialize();	3,584✔
379	result.test_lte("Expected size", c_wide_bytes.size(), 2 * order_bytes);	3,584✔
380
381	const auto z = Botan::EC_Scalar::from_bytes_mod_order(group, c_wide_bytes);	3,584✔
382
383	result.test_eq("from_bytes_mod_order", c.serialize(), z.serialize());	10,752✔
384	}	7,168✔
385
386	for(size_t i = 0; i != test_iter; ++i) {	3,612✔
387	std::vector<uint8_t> r(2 * group.get_order_bytes());	3,584✔
388
389	rng.randomize(r);	3,584✔
390
391	const auto ref = Botan::BigInt::from_bytes(r) % group.get_order();	3,584✔
392
393	const auto scalar = Botan::EC_Scalar::from_bytes_mod_order(group, r);	3,584✔
394
395	result.test_eq("from_bytes_mod_order (random)", scalar.serialize(), ref.serialize(group.get_order_bytes()));	10,752✔
396	}	7,168✔
397
398	result.end_timer();	28✔
399	}	56✔
400	};
401
402	BOTAN_REGISTER_TEST("pubkey", "ecc_scalar_arith", ECC_Scalar_Arithmetic_Tests);
403
404	#endif
405
406	} // namespace
407
408	} // namespace Botan_Tests

randombit / botan / 20579846577

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