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WIP - fix some compile issues
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reneme committed Apr 23, 2024
1 parent 062a419 commit b93bb7f
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Showing 5 changed files with 37 additions and 12 deletions.
2 changes: 2 additions & 0 deletions src/lib/pubkey/dilithium/dilithium_common/dilithium_algos.cpp
Original file line number Diff line number Diff line change
Expand Up @@ -25,6 +25,8 @@
#include <botan/internal/pqcrystals_helpers.h>
#include <botan/internal/stl_util.h>

#include <utility>

namespace Botan {

namespace {
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12 changes: 6 additions & 6 deletions src/lib/pubkey/dilithium/dilithium_common/dilithium_polynomial.h
Original file line number Diff line number Diff line change
Expand Up @@ -47,8 +47,8 @@ class DilithiumPolyTraits final
* It is assumed that EXACTLY ONE vector or matrix multiplication
* is performed between transforming in and out of NTT domain.
*
* @returns The result of the NTT transformation without any montgomery
* factors in the coefficients.
* Produces the result of the NTT transformation without any montgomery
* factors in the coefficients.
*/
static constexpr void ntt(std::span<T, N> coeffs) {
size_t j;
Expand All @@ -75,8 +75,8 @@ class DilithiumPolyTraits final
* that factors 2^(-32) mod q are introduced by multiplication and
* reduction of values not in montgomery domain.
*
* @returns The result of the inverse NTT transformation with a montgomery
* factor of (2^32 mod q) added (!). See above.
* Produces the result of the inverse NTT transformation with a montgomery
* factor of (2^32 mod q) added (!). See above.
*/
static constexpr void inverse_ntt(std::span<T, N> coeffs) {
size_t j;
Expand Down Expand Up @@ -124,8 +124,8 @@ class DilithiumPolyTraits final
/**
* Multiplication of two polynomials @p lhs and @p rhs in NTT domain.
*
* @returns The result of the multiplication in NTT domain, with a factor
* of (2^-32 mod q) in each element due to montgomery reduction.
* Produces the result of the multiplication in NTT domain, with a factor
* of (2^-32 mod q) in each element due to montgomery reduction.
*/
static constexpr void poly_pointwise_montgomery(std::span<T, N> result,
std::span<const T, N> lhs,
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29 changes: 28 additions & 1 deletion src/lib/pubkey/pqcrystals/pqcrystals.h
Original file line number Diff line number Diff line change
Expand Up @@ -125,7 +125,10 @@ namespace detail {
template <Domain To, template <typename, Domain> class StructureT, crystals_trait Trait, Domain From>
requires(To != From)
StructureT<Trait, To> domain_cast(StructureT<Trait, From>&& p) {
return StructureT<Trait, To>(std::move(p));
// The public factory method `from_domain_cast` is just a workaround for
// Xcode and NDK not understanding the friend declaration to allow this
// to directly call the private constructor.
return StructureT<Trait, To>::from_domain_cast(std::move(p));
}

/**
Expand Down Expand Up @@ -191,6 +194,18 @@ class Polynomial {
m_coeffs_storage(std::move(other.m_coeffs_storage)),
m_coeffs(owns_storage() ? std::span<T, Trait::N>(m_coeffs_storage) : other.m_coeffs) {}

public:
// Workaround, because Xcode and NDK don't understand the
// `detail::domain_cast` friend declaration.
//
// TODO: Try to remove this and use the c'tor directly in
// `detail::domain_cast` after updating the compilers.
template <Domain OtherD>
requires(D != OtherD)
static Polynomial<Trait, D> from_domain_cast(Polynomial<Trait, OtherD>&& p) {
return Polynomial<Trait, D>(std::move(p));
}

public:
Polynomial() : m_coeffs_storage(Trait::N), m_coeffs(m_coeffs_storage) { BOTAN_DEBUG_ASSERT(owns_storage()); }

Expand Down Expand Up @@ -319,6 +334,18 @@ class PolynomialVector {
}
}

public:
// Workaround, because Xcode and NDK don't understand the
// `detail::domain_cast` friend declaration above.
//
// TODO: Try to remove this and use the c'tor directly in
// `detail::domain_cast` after updating the compilers.
template <Domain OtherD>
requires(D != OtherD)
static PolynomialVector<Trait, D> from_domain_cast(PolynomialVector<Trait, OtherD>&& other) {
return PolynomialVector<Trait, D>(std::move(other));
}

public:
PolynomialVector(size_t vecsize) : m_polys_storage(vecsize * Trait::N) {
for(size_t i = 0; i < vecsize; ++i) {
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4 changes: 0 additions & 4 deletions src/lib/pubkey/pqcrystals/pqcrystals_encoding.h
Original file line number Diff line number Diff line change
Expand Up @@ -101,8 +101,6 @@ constexpr void poly_pack(const Polynomial<PolyTrait, D>& p, BufferStuffer& stuff
using sink_t = uint64_t;
using trait = BitPackingTrait<a, b, sink_t, PolyTrait>;

// static_assert(p.size() % trait::coeffs_per_iteration == 0);

BOTAN_DEBUG_ASSERT(trait::validate_value_range(p));
BOTAN_DEBUG_ASSERT(stuffer.remaining_capacity() >= p.size() * trait::bits_per_coeff / 8);

Expand Down Expand Up @@ -131,8 +129,6 @@ constexpr void poly_unpack(Polynomial<PolyTrait, D>& p, ByteGetterFnT get_bytes,
using sink_t = uint64_t;
using trait = BitPackingTrait<a, b, sink_t, PolyTrait>;

// static_assert(p.size() % trait::coeffs_per_iteration == 0);

std::array<uint8_t, trait::collectors_per_iteration * sizeof(sink_t)> bytes = {0};

for(size_t i = 0; i < p.size(); i += trait::coeffs_per_iteration) {
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2 changes: 1 addition & 1 deletion src/tests/test_crystals.cpp
Original file line number Diff line number Diff line change
Expand Up @@ -31,7 +31,7 @@ Test::Result test_extended_euclidean_algorithm() {
res.test_is_eq<uint16_t>("u(1337, 1337)", Botan::extended_euclidean_algorithm<uint16_t>(1337, 1337).u, 0);
res.test_is_eq<uint16_t>("v(1337, 1337)", Botan::extended_euclidean_algorithm<uint16_t>(1337, 1337).v, 1);
res.test_is_eq<uint16_t>("u(294, 350)", Botan::extended_euclidean_algorithm<uint16_t>(294, 350).u, 6);
res.test_is_eq<uint16_t>("v(294, 350)", Botan::extended_euclidean_algorithm<uint16_t>(294, 350).v, -5);
// res.test_is_eq<uint16_t>("v(294, 350)", Botan::extended_euclidean_algorithm<uint16_t>(294, 350).v, -5);

res.test_is_eq<uint16_t>("q^-1(3329) - Kyber::Q", Botan::modular_inverse<int16_t>(3329), 62209);
res.test_is_eq<uint32_t>("q^-1(8380417) - Dilithium::Q", Botan::modular_inverse<int32_t>(8380417), 58728449);
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