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Accelerate exact startup file hashing with native host crypto

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This commit is contained in:
Matthew Stanley
2026-10-06 20:00:55 -07:00
parent b389f9edf0
commit 1d201aa39f
8 changed files with 334 additions and 15 deletions
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runtime/src/mod_runtime.cpp
+7 -13
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@@ -9,6 +9,7 @@
#include "psx_memory.h"
#include "render_pass_projection.h"
#include "psx_sha256.h"
#include "psx_sha256_file.h"
#include "cpu_state.h"
#include "psx_lobby_client.h"
@@ -351,12 +352,12 @@ bool sha256_file(const std::filesystem::path& path, std::string& out,
if (path.empty()) return true;
const DiscPathResolution resolved = resolve_disc_path(path);
const std::filesystem::path input = resolved.data;
psx_sha256_ctx hash;
psx_sha256_init(&hash);
std::string extension = resolved.mount.extension().string();
std::transform(extension.begin(), extension.end(), extension.begin(),
[](unsigned char c) { return (char)std::tolower(c); });
if (extension == ".chd") {
psx_sha256_ctx hash;
psx_sha256_init(&hash);
PS1::ISOReader disc;
if (!disc.Open(resolved.mount.string())) {
if (error) *error =
@@ -383,24 +384,17 @@ bool sha256_file(const std::filesystem::path& path, std::string& out,
return true;
}
std::array<uint8_t, 1024 * 1024> buffer{};
std::ifstream file(input, std::ios::binary);
if (!file) {
uint8_t digest[32];
const auto result = psx_sha256_file(input, digest);
if (result == PsxFileHashResult::OpenError) {
if (error) *error = "cannot fingerprint image: " + input.string();
return false;
}
while (file) {
file.read((char*)buffer.data(), (std::streamsize)buffer.size());
const std::streamsize got = file.gcount();
if (got > 0) psx_sha256_update(&hash, buffer.data(), (size_t)got);
}
if (!file.eof()) {
if (result != PsxFileHashResult::Ok) {
if (error) *error =
"cannot finish fingerprinting image: " + input.string();
return false;
}
uint8_t digest[32];
psx_sha256_final(&hash, digest);
std::ostringstream text;
for (uint8_t byte : digest)
text << std::hex << std::setw(2) << std::setfill('0') << (unsigned)byte;