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aes_util: Make CalculateNintendoTweak() an internally linked function
This function doesn't directly depend on class state, so it can be hidden entirely from the interface in the cpp file.
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b25468b498
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2 changed files with 10 additions and 12 deletions
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@ -9,6 +9,16 @@
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#include "core/crypto/key_manager.h"
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namespace Core::Crypto {
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namespace {
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std::vector<u8> CalculateNintendoTweak(size_t sector_id) {
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std::vector<u8> out(0x10);
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for (size_t i = 0xF; i <= 0xF; --i) {
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out[i] = sector_id & 0xFF;
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sector_id >>= 8;
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}
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return out;
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}
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} // Anonymous namespace
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static_assert(static_cast<size_t>(Mode::CTR) == static_cast<size_t>(MBEDTLS_CIPHER_AES_128_CTR),
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"CTR has incorrect value.");
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@ -100,16 +110,6 @@ void AESCipher<Key, KeySize>::XTSTranscode(const u8* src, size_t size, u8* dest,
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}
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}
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template <typename Key, size_t KeySize>
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std::vector<u8> AESCipher<Key, KeySize>::CalculateNintendoTweak(size_t sector_id) {
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std::vector<u8> out(0x10);
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for (size_t i = 0xF; i <= 0xF; --i) {
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out[i] = sector_id & 0xFF;
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sector_id >>= 8;
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}
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return out;
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}
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template class AESCipher<Key128>;
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template class AESCipher<Key256>;
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} // namespace Core::Crypto
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@ -56,7 +56,5 @@ public:
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private:
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std::unique_ptr<CipherContext> ctx;
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static std::vector<u8> CalculateNintendoTweak(size_t sector_id);
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};
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} // namespace Core::Crypto
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