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crypto: make CRYPTO_DEFINE_HASH_FUNCTIONS adhere strict aliasing [RELEASE] #9692

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crypto: make CRYPTO_DEFINE_HASH_FUNCTIONS adhere strict aliasing [RELEASE] #9692

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9 changes: 7 additions & 2 deletions src/crypto/generic-ops.h
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Original file line number Diff line number Diff line change
Expand Up @@ -33,6 +33,7 @@
#include <cstddef>
#include <cstring>
#include <functional>
#include <memory>
#include <sodium/crypto_verify_32.h>

#define CRYPTO_MAKE_COMPARABLE(type) \
Expand Down Expand Up @@ -60,14 +61,18 @@ namespace crypto { \
namespace crypto { \
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) { \
return reinterpret_cast<const std::size_t &>(_v); \
std::size_t h; \
memcpy(&h, std::addressof(_v), sizeof(h)); \
return h; \
} \
} \
namespace std { \
template<> \
struct hash<crypto::type> { \
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; \
} \
}; \
}
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