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Add Bitwise::PackUInt64(<...>) utility function

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hashlag
2026-01-15 03:14:45 +03:00
parent 51c2da1e48
commit d63855a505
1 changed files with 15 additions and 12 deletions
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27
Chaos/Cipher/Des/DesCrypt.hpp
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@@ -62,6 +62,20 @@ struct Bitwise
{ {
return (lhs << BitsUsedIn) | rhs; return (lhs << BitsUsedIn) | rhs;
} }
template<typename InputIt>
static uint64_t PackUInt64(InputIt begin, InputIt end)
{
uint64_t result = 0;
int_fast8_t i = 0;
for (InputIt it = begin; i < 8 && it != end; ++i, ++it)
{
result |= static_cast<uint64_t>(*it) << (56 - (i * 8));
}
return result;
}
}; };
using RawKeyArray = Service::SeArray<uint8_t, 8>; using RawKeyArray = Service::SeArray<uint8_t, 8>;
@@ -76,18 +90,7 @@ public:
KeySchedule(const RawKeyArray & rawKeyArray) KeySchedule(const RawKeyArray & rawKeyArray)
{ {
Key64 key64 = 0; Key56 key56 = Pc1(Bitwise::PackUInt64(rawKeyArray.Begin(), rawKeyArray.End()));
key64 |= static_cast<Key64>(rawKeyArray[7]) << 0;
key64 |= static_cast<Key64>(rawKeyArray[6]) << 8;
key64 |= static_cast<Key64>(rawKeyArray[5]) << 16;
key64 |= static_cast<Key64>(rawKeyArray[4]) << 24;
key64 |= static_cast<Key64>(rawKeyArray[3]) << 32;
key64 |= static_cast<Key64>(rawKeyArray[2]) << 40;
key64 |= static_cast<Key64>(rawKeyArray[1]) << 48;
key64 |= static_cast<Key64>(rawKeyArray[0]) << 56;
Key56 key56 = Pc1(key64);
auto [c28, d28] = Bitwise::Split<28>(key56); auto [c28, d28] = Bitwise::Split<28>(key56);