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authorZach Hilman <zachhilman@gmail.com>2018-08-19 03:14:57 +0200
committerZach Hilman <zachhilman@gmail.com>2018-08-23 17:53:30 +0200
commit42dc856ce136c75f587649863ec5bd936ba8b07a (patch)
tree5b270705a38cc4187a5634f753c9caa2f398dfb8 /src/core/file_sys/xts_archive.cpp
parentkey_manager: Add support for autogenerated keys (diff)
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Diffstat (limited to '')
-rw-r--r--src/core/file_sys/xts_archive.cpp25
1 files changed, 14 insertions, 11 deletions
diff --git a/src/core/file_sys/xts_archive.cpp b/src/core/file_sys/xts_archive.cpp
index 54be31916..605c1a283 100644
--- a/src/core/file_sys/xts_archive.cpp
+++ b/src/core/file_sys/xts_archive.cpp
@@ -19,6 +19,8 @@
namespace FileSys {
+constexpr u64 NAX_HEADER_PADDING_SIZE = 0x4000;
+
template <typename SourceData, typename SourceKey, typename Destination>
static bool CalculateHMAC256(Destination* out, const SourceKey* key, size_t key_length,
const SourceData* data, size_t data_length) {
@@ -67,14 +69,14 @@ NAX::NAX(VirtualFile file_, std::array<u8, 0x10> nca_id)
Common::HexArrayToString(nca_id, false)));
}
-Loader::ResultStatus NAX::Parse(std::string path) {
+Loader::ResultStatus NAX::Parse(std::string_view path) {
if (file->ReadObject(header.get()) != sizeof(NAXHeader))
return Loader::ResultStatus::ErrorBadNAXHeader;
if (header->magic != Common::MakeMagic('N', 'A', 'X', '0'))
return Loader::ResultStatus::ErrorBadNAXHeader;
- if (file->GetSize() < 0x4000 + header->file_size)
+ if (file->GetSize() < NAX_HEADER_PADDING_SIZE + header->file_size)
return Loader::ResultStatus::ErrorIncorrectNAXFileSize;
keys.DeriveSDSeedLazy();
@@ -87,14 +89,14 @@ Loader::ResultStatus NAX::Parse(std::string path) {
const auto enc_keys = header->key_area;
size_t i = 0;
- for (; i < 2; ++i) {
+ for (; i < sd_keys.size(); ++i) {
std::array<Core::Crypto::Key128, 2> nax_keys{};
- if (!CalculateHMAC256(nax_keys.data(), sd_keys[i].data(), 0x10, path.c_str(),
+ if (!CalculateHMAC256(nax_keys.data(), sd_keys[i].data(), 0x10, std::string(path).c_str(),
path.size())) {
return Loader::ResultStatus::ErrorNAXKeyHMACFailed;
}
- for (size_t j = 0; j < 2; ++j) {
+ for (size_t j = 0; j < nax_keys.size(); ++j) {
Core::Crypto::AESCipher<Core::Crypto::Key128> cipher(nax_keys[j],
Core::Crypto::Mode::ECB);
cipher.Transcode(enc_keys[j].data(), 0x10, header->key_area[j].data(),
@@ -117,28 +119,29 @@ Loader::ResultStatus NAX::Parse(std::string path) {
type = static_cast<NAXContentType>(i);
Core::Crypto::Key256 final_key{};
- memcpy(final_key.data(), &header->key_area, 0x20);
- const auto enc_file = std::make_shared<OffsetVfsFile>(file, header->file_size, 0x4000);
+ std::memcpy(final_key.data(), &header->key_area, final_key.size());
+ const auto enc_file =
+ std::make_shared<OffsetVfsFile>(file, header->file_size, NAX_HEADER_PADDING_SIZE);
dec_file = std::make_shared<Core::Crypto::XTSEncryptionLayer>(enc_file, final_key);
return Loader::ResultStatus::Success;
}
-Loader::ResultStatus NAX::GetStatus() {
+Loader::ResultStatus NAX::GetStatus() const {
return status;
}
-VirtualFile NAX::GetDecrypted() {
+VirtualFile NAX::GetDecrypted() const {
return dec_file;
}
-std::shared_ptr<NCA> NAX::AsNCA() {
+std::shared_ptr<NCA> NAX::AsNCA() const {
if (type == NAXContentType::NCA)
return std::make_shared<NCA>(GetDecrypted());
return nullptr;
}
-NAXContentType NAX::GetContentType() {
+NAXContentType NAX::GetContentType() const {
return type;
}