diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/core/crypto/key_manager.cpp | 19 |
1 files changed, 13 insertions, 6 deletions
diff --git a/src/core/crypto/key_manager.cpp b/src/core/crypto/key_manager.cpp index daa779434..0b14bf15c 100644 --- a/src/core/crypto/key_manager.cpp +++ b/src/core/crypto/key_manager.cpp @@ -100,14 +100,21 @@ Loader::ResultStatus DeriveSDKeys(std::array<Key256, 2>& sd_keys, const KeyManag keys.GetKey(S256KeyType::SDKeySource, static_cast<u64>(SDKeyType::NCA)), }; - AESCipher<Key128> cipher(sd_kek, Mode::ECB); - for (size_t i = 0; i < 2; ++i) { - for (size_t j = 0; j < sd_key_sources[i].size(); ++j) - sd_key_sources[i][j] ^= sd_seed[j & 0xF]; - cipher.Transcode(sd_key_sources[i].data(), sd_key_sources[i].size(), sd_keys[i].data(), - Op::Decrypt); + // Combine sources and seed + for (auto& source : sd_key_sources) { + for (size_t i = 0; i < source.size(); ++i) + source[i] ^= sd_seed[i & 0xF]; } + AESCipher<Key128> cipher(sd_kek, Mode::ECB); + // The transform manipulates sd_keys as part of the Transcode, so the return/output is + // unnecessary. This does not alter sd_keys_sources. + std::transform(sd_key_sources.begin(), sd_key_sources.end(), sd_keys.begin(), + sd_key_sources.begin(), [&cipher](const Key256& source, Key256& out) { + cipher.Transcode(source.data(), source.size(), out.data(), Op::Decrypt); + return source; ///< Return unaltered source to satisfy output requirement. + }); + return Loader::ResultStatus::Success; } |