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aes_util: Allow SetIV to be non-allocating

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In a few places, the data to be set as the IV is already within an array.
We shouldn't require this data to be heap-allocated if it doesn't need
to be. This allows certain callers to reduce heap churn.
This commit is contained in:
Lioncash
2020-08-03 14:14:39 -04:00
parent 9b75481755
commit 15660bd857
7 changed files with 36 additions and 27 deletions
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5
src/core/crypto/partition_data_manager.cpp
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@ -346,10 +346,9 @@ FileSys::VirtualFile PartitionDataManager::GetPackage2Raw(Package2Type type) con
}
static bool AttemptDecrypt(const std::array<u8, 16>& key, Package2Header& header) {
const std::vector<u8> iv(header.header_ctr.begin(), header.header_ctr.end());
Package2Header temp = header;
AESCipher<Key128> cipher(key, Mode::CTR);
cipher.SetIV(iv);
cipher.SetIV(header.header_ctr);
cipher.Transcode(&temp.header_ctr, sizeof(Package2Header) - 0x100, &temp.header_ctr,
Op::Decrypt);
if (temp.magic == Common::MakeMagic('P', 'K', '2', '1')) {
@ -388,7 +387,7 @@ void PartitionDataManager::DecryptPackage2(const std::array<Key128, 0x20>& packa
auto c = a->ReadAllBytes();
AESCipher<Key128> cipher(package2_keys[revision], Mode::CTR);
cipher.SetIV({header.section_ctr[1].begin(), header.section_ctr[1].end()});
cipher.SetIV(header.section_ctr[1]);
cipher.Transcode(c.data(), c.size(), c.data(), Op::Decrypt);
const auto ini_file = std::make_shared<FileSys::VectorVfsFile>(c);