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crypto: make CRYPTO_DEFINE_HASH_FUNCTIONS adhere strict aliasing

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This code could've caused issues if the pointer to the `public_key`, `key_image`, `hash`, etc wasn't aligned on an 8-byte boundary.
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jeffro256 2025-01-09 00:48:51 -06:00
parent 2fe0f04c1e
commit 27858049da
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GPG Key ID: 6F79797A6E392442
1 changed files with 7 additions and 2 deletions
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9
src/crypto/generic-ops.h
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@ -33,6 +33,7 @@
#include <cstddef> #include <cstddef>
#include <cstring> #include <cstring>
#include <functional> #include <functional>
#include <memory>
#include <sodium/crypto_verify_32.h> #include <sodium/crypto_verify_32.h>
#define CRYPTO_MAKE_COMPARABLE(type) \ #define CRYPTO_MAKE_COMPARABLE(type) \
@ -60,14 +61,18 @@ namespace crypto { \
namespace crypto { \ namespace crypto { \
static_assert(sizeof(std::size_t) <= sizeof(type), "Size of " #type " must be at least that of size_t"); \ static_assert(sizeof(std::size_t) <= sizeof(type), "Size of " #type " must be at least that of size_t"); \
inline std::size_t hash_value(const type &_v) { \ inline std::size_t hash_value(const type &_v) { \
return reinterpret_cast<const std::size_t &>(_v); \ std::size_t h; \
memcpy(&h, std::addressof(_v), sizeof(h)); \
return h; \
} \ } \
} \ } \
namespace std { \ namespace std { \
template<> \ template<> \
struct hash<crypto::type> { \ struct hash<crypto::type> { \
std::size_t operator()(const crypto::type &_v) const { \ std::size_t operator()(const crypto::type &_v) const { \
return reinterpret_cast<const std::size_t &>(_v); \ std::size_t h; \
memcpy(&h, std::addressof(_v), sizeof(h)); \
return h; \
} \ } \
}; \ }; \
} }