13230468750

Committed 09 Feb 2025 11:07PM UTC coverage: 91.651% (-0.008%) from 91.659%

Build # 13230468750

Build Type

Pull #4647

github

Committed by

web-flow

Commit Message

Merge 8b67be1f1 into 7deaa69bb

Pull Request Pull Request #4647: Avoid using mem_ops.h or assert.h in public headers

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95.49

/src/lib/pubkey/ec_group/ec_inner_pc.cpp

/*
* (C) 2024 Jack Lloyd
*
* Botan is released under the Simplified BSD License (see license.txt)
*/

#include <botan/internal/ec_inner_pc.h>

#include <botan/mem_ops.h>

namespace Botan {

const EC_Scalar_Data_PC& EC_Scalar_Data_PC::checked_ref(const EC_Scalar_Data& data) {
   const auto* p = dynamic_cast<const EC_Scalar_Data_PC*>(&data);
   if(!p) {
      throw Invalid_State("Failed conversion to EC_Scalar_Data_PC");
   }
   return *p;
}

const std::shared_ptr<const EC_Group_Data>& EC_Scalar_Data_PC::group() const {
   return m_group;
}

size_t EC_Scalar_Data_PC::bytes() const {
   return this->group()->order_bytes();
}

std::unique_ptr<EC_Scalar_Data> EC_Scalar_Data_PC::clone() const {
   return std::make_unique<EC_Scalar_Data_PC>(this->group(), this->value());
}

bool EC_Scalar_Data_PC::is_zero() const {
   auto& pcurve = this->group()->pcurve();
   return pcurve.scalar_is_zero(m_v);
}

bool EC_Scalar_Data_PC::is_eq(const EC_Scalar_Data& other) const {
   auto& pcurve = group()->pcurve();
   return pcurve.scalar_equal(m_v, checked_ref(other).m_v);
}

void EC_Scalar_Data_PC::assign(const EC_Scalar_Data& other) {
   m_v = checked_ref(other).value();
}

void EC_Scalar_Data_PC::square_self() {
   // TODO square in place
   m_v = m_group->pcurve().scalar_square(m_v);
}

std::unique_ptr<EC_Scalar_Data> EC_Scalar_Data_PC::negate() const {
   return std::make_unique<EC_Scalar_Data_PC>(m_group, m_group->pcurve().scalar_negate(m_v));
}

std::unique_ptr<EC_Scalar_Data> EC_Scalar_Data_PC::invert() const {
   return std::make_unique<EC_Scalar_Data_PC>(m_group, m_group->pcurve().scalar_invert(m_v));
}

std::unique_ptr<EC_Scalar_Data> EC_Scalar_Data_PC::invert_vartime() const {
   return std::make_unique<EC_Scalar_Data_PC>(m_group, m_group->pcurve().scalar_invert_vartime(m_v));
}

std::unique_ptr<EC_Scalar_Data> EC_Scalar_Data_PC::add(const EC_Scalar_Data& other) const {
   return std::make_unique<EC_Scalar_Data_PC>(m_group, group()->pcurve().scalar_add(m_v, checked_ref(other).m_v));
}

std::unique_ptr<EC_Scalar_Data> EC_Scalar_Data_PC::sub(const EC_Scalar_Data& other) const {
   return std::make_unique<EC_Scalar_Data_PC>(m_group, group()->pcurve().scalar_sub(m_v, checked_ref(other).m_v));
}

std::unique_ptr<EC_Scalar_Data> EC_Scalar_Data_PC::mul(const EC_Scalar_Data& other) const {
   return std::make_unique<EC_Scalar_Data_PC>(m_group, group()->pcurve().scalar_mul(m_v, checked_ref(other).m_v));
}

void EC_Scalar_Data_PC::serialize_to(std::span<uint8_t> bytes) const {
   BOTAN_ARG_CHECK(bytes.size() == m_group->order_bytes(), "Invalid output length");
   m_group->pcurve().serialize_scalar(bytes, m_v);
}

EC_AffinePoint_Data_PC::EC_AffinePoint_Data_PC(std::shared_ptr<const EC_Group_Data> group,
                                               PCurve::PrimeOrderCurve::AffinePoint pt) :
      m_group(std::move(group)), m_pt(std::move(pt)) {
   auto& pcurve = m_group->pcurve();

   if(!pcurve.affine_point_is_identity(m_pt)) {
      m_xy.resize(1 + 2 * field_element_bytes());
      pcurve.serialize_point(m_xy, m_pt);
   }
}

const EC_AffinePoint_Data_PC& EC_AffinePoint_Data_PC::checked_ref(const EC_AffinePoint_Data& data) {
   const auto* p = dynamic_cast<const EC_AffinePoint_Data_PC*>(&data);
   if(!p) {
      throw Invalid_State("Failed conversion to EC_AffinePoint_Data_PC");
   }
   return *p;
}

std::unique_ptr<EC_AffinePoint_Data> EC_AffinePoint_Data_PC::clone() const {
   return std::make_unique<EC_AffinePoint_Data_PC>(m_group, m_pt);
}

const std::shared_ptr<const EC_Group_Data>& EC_AffinePoint_Data_PC::group() const {
   return m_group;
}

std::unique_ptr<EC_AffinePoint_Data> EC_AffinePoint_Data_PC::mul(const EC_Scalar_Data& scalar,
                                                                 RandomNumberGenerator& rng,
                                                                 std::vector<BigInt>& ws) const {
   BOTAN_UNUSED(ws);

   BOTAN_ARG_CHECK(scalar.group() == m_group, "Curve mismatch");
   const auto& k = EC_Scalar_Data_PC::checked_ref(scalar).value();
   auto& pcurve = m_group->pcurve();
   auto pt = pcurve.point_to_affine(pcurve.mul(m_pt, k, rng));
   return std::make_unique<EC_AffinePoint_Data_PC>(m_group, std::move(pt));
}

secure_vector<uint8_t> EC_AffinePoint_Data_PC::mul_x_only(const EC_Scalar_Data& scalar,
                                                          RandomNumberGenerator& rng,
                                                          std::vector<BigInt>& ws) const {
   BOTAN_UNUSED(ws);

   BOTAN_ARG_CHECK(scalar.group() == m_group, "Curve mismatch");
   const auto& k = EC_Scalar_Data_PC::checked_ref(scalar).value();
   return m_group->pcurve().mul_x_only(m_pt, k, rng);
}

size_t EC_AffinePoint_Data_PC::field_element_bytes() const {
   return m_group->pcurve().field_element_bytes();
}

bool EC_AffinePoint_Data_PC::is_identity() const {
   return m_xy.empty();
}

void EC_AffinePoint_Data_PC::serialize_x_to(std::span<uint8_t> bytes) const {
   BOTAN_STATE_CHECK(!this->is_identity());
   const size_t fe_bytes = this->field_element_bytes();
   BOTAN_ARG_CHECK(bytes.size() == fe_bytes, "Invalid output size");
   copy_mem(bytes, std::span{m_xy}.subspan(1, fe_bytes));
}

void EC_AffinePoint_Data_PC::serialize_y_to(std::span<uint8_t> bytes) const {
   BOTAN_STATE_CHECK(!this->is_identity());
   const size_t fe_bytes = this->field_element_bytes();
   BOTAN_ARG_CHECK(bytes.size() == fe_bytes, "Invalid output size");
   copy_mem(bytes, std::span{m_xy}.subspan(1 + fe_bytes, fe_bytes));
}

void EC_AffinePoint_Data_PC::serialize_xy_to(std::span<uint8_t> bytes) const {
   BOTAN_STATE_CHECK(!this->is_identity());
   const size_t fe_bytes = this->field_element_bytes();
   BOTAN_ARG_CHECK(bytes.size() == 2 * fe_bytes, "Invalid output size");
   copy_mem(bytes, std::span{m_xy}.last(2 * fe_bytes));
}

void EC_AffinePoint_Data_PC::serialize_compressed_to(std::span<uint8_t> bytes) const {
   BOTAN_STATE_CHECK(!this->is_identity());
   const size_t fe_bytes = this->field_element_bytes();
   BOTAN_ARG_CHECK(bytes.size() == 1 + fe_bytes, "Invalid output size");
   const bool y_is_odd = (m_xy.back() & 0x01) == 0x01;

   BufferStuffer stuffer(bytes);
   stuffer.append(y_is_odd ? 0x03 : 0x02);
   this->serialize_x_to(stuffer.next(fe_bytes));
}

void EC_AffinePoint_Data_PC::serialize_uncompressed_to(std::span<uint8_t> bytes) const {
   BOTAN_STATE_CHECK(!this->is_identity());
   const size_t fe_bytes = this->field_element_bytes();
   BOTAN_ARG_CHECK(bytes.size() == 1 + 2 * fe_bytes, "Invalid output size");
   copy_mem(bytes, m_xy);
}

#if defined(BOTAN_HAS_LEGACY_EC_POINT)
EC_Point EC_AffinePoint_Data_PC::to_legacy_point() const {
   if(this->is_identity()) {
      return EC_Point(m_group->curve());
   } else {
      const size_t fe_bytes = this->field_element_bytes();
      return EC_Point(m_group->curve(),
                      BigInt::from_bytes(std::span{m_xy}.subspan(1, fe_bytes)),
                      BigInt::from_bytes(std::span{m_xy}.last(fe_bytes)));
   }
}
#endif

EC_Mul2Table_Data_PC::EC_Mul2Table_Data_PC(const EC_AffinePoint_Data& q) : m_group(q.group()) {
   BOTAN_ARG_CHECK(q.group() == m_group, "Curve mismatch");

   const auto& pt_q = EC_AffinePoint_Data_PC::checked_ref(q);

   m_tbl = m_group->pcurve().mul2_setup_g(pt_q.value());
}

std::unique_ptr<EC_AffinePoint_Data> EC_Mul2Table_Data_PC::mul2_vartime(const EC_Scalar_Data& xd,
                                                                        const EC_Scalar_Data& yd) const {
   BOTAN_ARG_CHECK(xd.group() == m_group && yd.group() == m_group, "Curve mismatch");

   const auto& x = EC_Scalar_Data_PC::checked_ref(xd);
   const auto& y = EC_Scalar_Data_PC::checked_ref(yd);

   auto& pcurve = m_group->pcurve();

   if(auto pt = pcurve.mul2_vartime(*m_tbl, x.value(), y.value())) {
      return std::make_unique<EC_AffinePoint_Data_PC>(m_group, pcurve.point_to_affine(*pt));
   } else {
      return nullptr;
   }
}

bool EC_Mul2Table_Data_PC::mul2_vartime_x_mod_order_eq(const EC_Scalar_Data& vd,
                                                       const EC_Scalar_Data& xd,
                                                       const EC_Scalar_Data& yd) const {
   BOTAN_ARG_CHECK(xd.group() == m_group && yd.group() == m_group, "Curve mismatch");

   const auto& v = EC_Scalar_Data_PC::checked_ref(vd);
   const auto& x = EC_Scalar_Data_PC::checked_ref(xd);
   const auto& y = EC_Scalar_Data_PC::checked_ref(yd);

   return m_group->pcurve().mul2_vartime_x_mod_order_eq(*m_tbl, v.value(), x.value(), y.value());
}

}  // namespace Botan

1	/*
2	* (C) 2024 Jack Lloyd
3	*
4	* Botan is released under the Simplified BSD License (see license.txt)
5	*/
6
7	#include <botan/internal/ec_inner_pc.h>
8
9	#include <botan/mem_ops.h>
10
11	namespace Botan {
12
13	const EC_Scalar_Data_PC& EC_Scalar_Data_PC::checked_ref(const EC_Scalar_Data& data) {	159,551✔
14	const auto* p = dynamic_cast<const EC_Scalar_Data_PC*>(&data);	159,551✔
15	if(!p) {	159,551✔
16	throw Invalid_State("Failed conversion to EC_Scalar_Data_PC");	×
17	}
18	return *p;	159,551✔
19	}
20
21	const std::shared_ptr<const EC_Group_Data>& EC_Scalar_Data_PC::group() const {	105,007✔
22	return m_group;	41,904✔
23	}
24
25	size_t EC_Scalar_Data_PC::bytes() const {	47,331✔
26	return this->group()->order_bytes();	47,331✔
27	}
28
29	std::unique_ptr<EC_Scalar_Data> EC_Scalar_Data_PC::clone() const {	41,904✔
30	return std::make_unique<EC_Scalar_Data_PC>(this->group(), this->value());	41,904✔
31	}
32
33	bool EC_Scalar_Data_PC::is_zero() const {	39,697✔
34	auto& pcurve = this->group()->pcurve();	39,697✔
35	return pcurve.scalar_is_zero(m_v);	39,697✔
36	}
37
38	bool EC_Scalar_Data_PC::is_eq(const EC_Scalar_Data& other) const {	1,682✔
39	auto& pcurve = group()->pcurve();	1,682✔
40	return pcurve.scalar_equal(m_v, checked_ref(other).m_v);	1,682✔
41	}
42
43	void EC_Scalar_Data_PC::assign(const EC_Scalar_Data& other) {	×
44	m_v = checked_ref(other).value();	×
45	}	×
46
47	void EC_Scalar_Data_PC::square_self() {	3,192✔
48	// TODO square in place
49	m_v = m_group->pcurve().scalar_square(m_v);	3,192✔
50	}	3,192✔
51
52	std::unique_ptr<EC_Scalar_Data> EC_Scalar_Data_PC::negate() const {	7,425✔
53	return std::make_unique<EC_Scalar_Data_PC>(m_group, m_group->pcurve().scalar_negate(m_v));	7,425✔
54	}
55
56	std::unique_ptr<EC_Scalar_Data> EC_Scalar_Data_PC::invert() const {	6,956✔
57	return std::make_unique<EC_Scalar_Data_PC>(m_group, m_group->pcurve().scalar_invert(m_v));	6,956✔
58	}
59
60	std::unique_ptr<EC_Scalar_Data> EC_Scalar_Data_PC::invert_vartime() const {	19,245✔
61	return std::make_unique<EC_Scalar_Data_PC>(m_group, m_group->pcurve().scalar_invert_vartime(m_v));	19,245✔
62	}
63
64	std::unique_ptr<EC_Scalar_Data> EC_Scalar_Data_PC::add(const EC_Scalar_Data& other) const {	8,471✔
65	return std::make_unique<EC_Scalar_Data_PC>(m_group, group()->pcurve().scalar_add(m_v, checked_ref(other).m_v));	8,471✔
66	}
67
68	std::unique_ptr<EC_Scalar_Data> EC_Scalar_Data_PC::sub(const EC_Scalar_Data& other) const {	6,487✔
69	return std::make_unique<EC_Scalar_Data_PC>(m_group, group()->pcurve().scalar_sub(m_v, checked_ref(other).m_v));	6,487✔
70	}
71
72	std::unique_ptr<EC_Scalar_Data> EC_Scalar_Data_PC::mul(const EC_Scalar_Data& other) const {	60,282✔
73	return std::make_unique<EC_Scalar_Data_PC>(m_group, group()->pcurve().scalar_mul(m_v, checked_ref(other).m_v));	60,282✔
74	}
75
76	void EC_Scalar_Data_PC::serialize_to(std::span<uint8_t> bytes) const {	48,196✔
77	BOTAN_ARG_CHECK(bytes.size() == m_group->order_bytes(), "Invalid output length");	48,196✔
78	m_group->pcurve().serialize_scalar(bytes, m_v);	48,196✔
79	}	48,196✔
80
81	EC_AffinePoint_Data_PC::EC_AffinePoint_Data_PC(std::shared_ptr<const EC_Group_Data> group,	71,649✔
82	PCurve::PrimeOrderCurve::AffinePoint pt) :	71,649✔
83	m_group(std::move(group)), m_pt(std::move(pt)) {	71,649✔
84	auto& pcurve = m_group->pcurve();	71,649✔
85
86	if(!pcurve.affine_point_is_identity(m_pt)) {	71,649✔
87	m_xy.resize(1 + 2 * field_element_bytes());	71,433✔
88	pcurve.serialize_point(m_xy, m_pt);	71,433✔
89	}
90	}	71,649✔
91
92	const EC_AffinePoint_Data_PC& EC_AffinePoint_Data_PC::checked_ref(const EC_AffinePoint_Data& data) {	32,784✔
93	const auto* p = dynamic_cast<const EC_AffinePoint_Data_PC*>(&data);	32,784✔
94	if(!p) {	32,784✔
95	throw Invalid_State("Failed conversion to EC_AffinePoint_Data_PC");	×
96	}
97	return *p;	32,784✔
98	}
99
100	std::unique_ptr<EC_AffinePoint_Data> EC_AffinePoint_Data_PC::clone() const {	11,705✔
101	return std::make_unique<EC_AffinePoint_Data_PC>(m_group, m_pt);	11,705✔
102	}
103
104	const std::shared_ptr<const EC_Group_Data>& EC_AffinePoint_Data_PC::group() const {	49,582✔
105	return m_group;	49,582✔
106	}
107
108	std::unique_ptr<EC_AffinePoint_Data> EC_AffinePoint_Data_PC::mul(const EC_Scalar_Data& scalar,	10,021✔
109	RandomNumberGenerator& rng,
110	std::vector<BigInt>& ws) const {
111	BOTAN_UNUSED(ws);	10,021✔
112
113	BOTAN_ARG_CHECK(scalar.group() == m_group, "Curve mismatch");	10,021✔
114	const auto& k = EC_Scalar_Data_PC::checked_ref(scalar).value();	10,021✔
115	auto& pcurve = m_group->pcurve();	10,021✔
116	auto pt = pcurve.point_to_affine(pcurve.mul(m_pt, k, rng));	10,021✔
117	return std::make_unique<EC_AffinePoint_Data_PC>(m_group, std::move(pt));	10,021✔
118	}	10,021✔
119
120	secure_vector<uint8_t> EC_AffinePoint_Data_PC::mul_x_only(const EC_Scalar_Data& scalar,	2,651✔
121	RandomNumberGenerator& rng,
122	std::vector<BigInt>& ws) const {
123	BOTAN_UNUSED(ws);	2,651✔
124
125	BOTAN_ARG_CHECK(scalar.group() == m_group, "Curve mismatch");	2,651✔
126	const auto& k = EC_Scalar_Data_PC::checked_ref(scalar).value();	2,651✔
127	return m_group->pcurve().mul_x_only(m_pt, k, rng);	2,651✔
128	}
129
130	size_t EC_AffinePoint_Data_PC::field_element_bytes() const {	149,577✔
131	return m_group->pcurve().field_element_bytes();	149,577✔
132	}
133
134	bool EC_AffinePoint_Data_PC::is_identity() const {	80,520✔
135	return m_xy.empty();	80,520✔
136	}
137
138	void EC_AffinePoint_Data_PC::serialize_x_to(std::span<uint8_t> bytes) const {	8,630✔
139	BOTAN_STATE_CHECK(!this->is_identity());	8,630✔
140	const size_t fe_bytes = this->field_element_bytes();	8,630✔
141	BOTAN_ARG_CHECK(bytes.size() == fe_bytes, "Invalid output size");	8,630✔
142	copy_mem(bytes, std::span{m_xy}.subspan(1, fe_bytes));	8,630✔
143	}	8,630✔
144
145	void EC_AffinePoint_Data_PC::serialize_y_to(std::span<uint8_t> bytes) const {	20✔
146	BOTAN_STATE_CHECK(!this->is_identity());	20✔
147	const size_t fe_bytes = this->field_element_bytes();	20✔
148	BOTAN_ARG_CHECK(bytes.size() == fe_bytes, "Invalid output size");	20✔
149	copy_mem(bytes, std::span{m_xy}.subspan(1 + fe_bytes, fe_bytes));	20✔
150	}	20✔
151
152	void EC_AffinePoint_Data_PC::serialize_xy_to(std::span<uint8_t> bytes) const {	150✔
153	BOTAN_STATE_CHECK(!this->is_identity());	150✔
154	const size_t fe_bytes = this->field_element_bytes();	150✔
155	BOTAN_ARG_CHECK(bytes.size() == 2 * fe_bytes, "Invalid output size");	150✔
156	copy_mem(bytes, std::span{m_xy}.last(2 * fe_bytes));	150✔
157	}	150✔
158
159	void EC_AffinePoint_Data_PC::serialize_compressed_to(std::span<uint8_t> bytes) const {	8,206✔
160	BOTAN_STATE_CHECK(!this->is_identity());	8,206✔
161	const size_t fe_bytes = this->field_element_bytes();	8,206✔
162	BOTAN_ARG_CHECK(bytes.size() == 1 + fe_bytes, "Invalid output size");	8,206✔
163	const bool y_is_odd = (m_xy.back() & 0x01) == 0x01;	8,206✔
164
165	BufferStuffer stuffer(bytes);	8,206✔
166	stuffer.append(y_is_odd ? 0x03 : 0x02);	12,412✔
167	this->serialize_x_to(stuffer.next(fe_bytes));	8,206✔
168	}	8,206✔
169
170	void EC_AffinePoint_Data_PC::serialize_uncompressed_to(std::span<uint8_t> bytes) const {	15,291✔
171	BOTAN_STATE_CHECK(!this->is_identity());	15,291✔
172	const size_t fe_bytes = this->field_element_bytes();	15,291✔
173	BOTAN_ARG_CHECK(bytes.size() == 1 + 2 * fe_bytes, "Invalid output size");	15,291✔
174	copy_mem(bytes, m_xy);	15,291✔
175	}	15,291✔
176
177	#if defined(BOTAN_HAS_LEGACY_EC_POINT)
178	EC_Point EC_AffinePoint_Data_PC::to_legacy_point() const {	21,866✔
179	if(this->is_identity()) {	21,866✔
180	return EC_Point(m_group->curve());	96✔
181	} else {
182	const size_t fe_bytes = this->field_element_bytes();	21,770✔
183	return EC_Point(m_group->curve(),	21,770✔
184	BigInt::from_bytes(std::span{m_xy}.subspan(1, fe_bytes)),	43,540✔
185	BigInt::from_bytes(std::span{m_xy}.last(fe_bytes)));	65,310✔
186	}
187	}
188	#endif
189
190	EC_Mul2Table_Data_PC::EC_Mul2Table_Data_PC(const EC_AffinePoint_Data& q) : m_group(q.group()) {	11,172✔
191	BOTAN_ARG_CHECK(q.group() == m_group, "Curve mismatch");	11,172✔
192
193	const auto& pt_q = EC_AffinePoint_Data_PC::checked_ref(q);	11,172✔
194
195	m_tbl = m_group->pcurve().mul2_setup_g(pt_q.value());	11,172✔
196	}	11,172✔
197
198	std::unique_ptr<EC_AffinePoint_Data> EC_Mul2Table_Data_PC::mul2_vartime(const EC_Scalar_Data& xd,	1,102✔
199	const EC_Scalar_Data& yd) const {
200	BOTAN_ARG_CHECK(xd.group() == m_group && yd.group() == m_group, "Curve mismatch");	1,102✔
201
202	const auto& x = EC_Scalar_Data_PC::checked_ref(xd);	1,102✔
203	const auto& y = EC_Scalar_Data_PC::checked_ref(yd);	1,102✔
204
205	auto& pcurve = m_group->pcurve();	1,102✔
206
207	if(auto pt = pcurve.mul2_vartime(*m_tbl, x.value(), y.value())) {	1,102✔
208	return std::make_unique<EC_AffinePoint_Data_PC>(m_group, pcurve.point_to_affine(*pt));	1,102✔
209	} else {
210	return nullptr;	×
211	}	1,102✔
212	}
213
214	bool EC_Mul2Table_Data_PC::mul2_vartime_x_mod_order_eq(const EC_Scalar_Data& vd,	17,624✔
215	const EC_Scalar_Data& xd,
216	const EC_Scalar_Data& yd) const {
217	BOTAN_ARG_CHECK(xd.group() == m_group && yd.group() == m_group, "Curve mismatch");	17,624✔
218
219	const auto& v = EC_Scalar_Data_PC::checked_ref(vd);	17,624✔
220	const auto& x = EC_Scalar_Data_PC::checked_ref(xd);	17,624✔
221	const auto& y = EC_Scalar_Data_PC::checked_ref(yd);	17,624✔
222
223	return m_group->pcurve().mul2_vartime_x_mod_order_eq(*m_tbl, v.value(), x.value(), y.value());	17,624✔
224	}
225
226	} // namespace Botan

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