IOS: implement /dev/sha

Source/Core/Core/CMakeLists.txt

@@ -336,6 +336,8 @@ add_library(core
   IOS/Device.h
   IOS/DeviceStub.cpp
   IOS/DeviceStub.h
+  IOS/Crypto/Sha.cpp
+  IOS/Crypto/Sha.h
   IOS/DI/DI.cpp
   IOS/DI/DI.h
   IOS/DolphinDevice.cpp

Source/Core/Core/IOS/Crypto/Sha.cpp

@@ -0,0 +1,101 @@
+// Copyright 2023 Dolphin Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include "Core/IOS/Crypto/Sha.h"
+
+#include <algorithm>
+#include <array>
+#include <iterator>
+#include <memory>
+#include <optional>
+#include <vector>
+
+#include <mbedtls/sha1.h>
+
+#include "Common/Assert.h"
+#include "Common/ChunkFile.h"
+#include "Common/CommonTypes.h"
+#include "Core/HW/MMIO.h"
+#include "Core/HW/Memmap.h"
+#include "Core/System.h"
+
+namespace IOS::HLE
+{
+ShaDevice::ShaDevice(EmulationKernel& ios, const std::string& device_name)
+    : EmulationDevice(ios, device_name)
+{
+}
+
+std::optional<IPCReply> ShaDevice::Open(const OpenRequest& request)
+{
+  return Device::Open(request);
+}
+
+static void ConvertContext(const ShaDevice::ShaContext& src, mbedtls_sha1_context* dest)
+{
+  std::copy(std::begin(src.length), std::end(src.length), std::begin(dest->total));
+  std::copy(std::begin(src.states), std::end(src.states), std::begin(dest->state));
+}
+
+static void ConvertContext(const mbedtls_sha1_context& src, ShaDevice::ShaContext* dest)
+{
+  std::copy(std::begin(src.total), std::end(src.total), std::begin(dest->length));
+  std::copy(std::begin(src.state), std::end(src.state), std::begin(dest->states));
+}
+
+HLE::ReturnCode ShaDevice::ProcessShaCommand(ShaIoctlv command, const IOCtlVRequest& request)
+{
+  auto& system = GetSystem();
+  auto& memory = system.GetMemory();
+  auto ret = 0;
+  std::array<u8, 20> output_hash{};
+  mbedtls_sha1_context context;
+  ShaDevice::ShaContext engine_context;
+  memory.CopyFromEmu(&engine_context, request.io_vectors[0].address, sizeof(ShaDevice::ShaContext));
+  ConvertContext(engine_context, &context);
+
+  // reset the context
+  if (command == ShaIoctlv::InitState)
+  {
+    ret = mbedtls_sha1_starts_ret(&context);
+  }
+  else
+  {
+    std::vector<u8> input_data(request.in_vectors[0].size);
+    memory.CopyFromEmu(input_data.data(), request.in_vectors[0].address, input_data.size());
+    ret = mbedtls_sha1_update_ret(&context, input_data.data(), input_data.size());
+    if (!ret && command == ShaIoctlv::FinalizeState)
+    {
+      ret = mbedtls_sha1_finish_ret(&context, output_hash.data());
+    }
+  }
+
+  ConvertContext(context, &engine_context);
+  memory.CopyToEmu(request.io_vectors[0].address, &engine_context, sizeof(ShaDevice::ShaContext));
+  if (!ret && command == ShaIoctlv::FinalizeState)
+    memory.CopyToEmu(request.io_vectors[1].address, output_hash.data(), output_hash.size());
+
+  mbedtls_sha1_free(&context);
+  return ret ? HLE::ReturnCode::IPC_EACCES : HLE::ReturnCode::IPC_SUCCESS;
+}
+
+std::optional<IPCReply> ShaDevice::IOCtlV(const IOCtlVRequest& request)
+{
+  HLE::ReturnCode return_code = IPC_EINVAL;
+  ShaIoctlv command = static_cast<ShaIoctlv>(request.request);
+
+  switch (command)
+  {
+  case ShaIoctlv::InitState:
+  case ShaIoctlv::ContributeState:
+  case ShaIoctlv::FinalizeState:
+    if (!request.HasNumberOfValidVectors(1, 2))
+      break;
+
+    return_code = ProcessShaCommand(command, request);
+  }
+
+  return IPCReply(return_code);
+}
+
+}  // namespace IOS::HLE

Source/Core/Core/IOS/Crypto/Sha.h

@@ -0,0 +1,37 @@
+// Copyright 2023 Dolphin Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include <array>
+
+#include "Common/Crypto/SHA1.h"
+#include "Core/IOS/Device.h"
+
+namespace IOS::HLE
+{
+class ShaDevice final : public EmulationDevice
+{
+public:
+  ShaDevice(EmulationKernel& ios, const std::string& device_name);
+  std::optional<IPCReply> Open(const OpenRequest& request) override;
+  std::optional<IPCReply> IOCtlV(const IOCtlVRequest& request) override;
+
+  enum class ShaIoctlv : u32
+  {
+    InitState = 0x00,
+    ContributeState = 0x01,
+    FinalizeState = 0x02,
+    ShaCommandUnknown = 0x0F
+  };
+
+  struct ShaContext
+  {
+    std::array<u32, 5> states;
+    std::array<u32, 2> length;  // length in bits of total data contributed to SHA-1 hash
+  };
+
+private:
+  HLE::ReturnCode ProcessShaCommand(ShaIoctlv command, const IOCtlVRequest& request);
+};
+}  // namespace IOS::HLE

Source/Core/Core/IOS/IOS.cpp

@@ -28,6 +28,7 @@
 #include "Core/CoreTiming.h"
 #include "Core/HW/Memmap.h"
 #include "Core/HW/WII_IPC.h"
+#include "Core/IOS/Crypto/Sha.h"
 #include "Core/IOS/DI/DI.h"
 #include "Core/IOS/Device.h"
 #include "Core/IOS/DeviceStub.h"
@@ -333,6 +334,8 @@ EmulationKernel::EmulationKernel(Core::System& system, u64 title_id)
 
   m_fs = FS::MakeFileSystem(IOS::HLE::FS::Location::Session, Core::GetActiveNandRedirects());
   ASSERT(m_fs);
+  
+  AddDevice(std::make_unique<ShaDevice>(*this, "/dev/sha"));
 
   m_fs_core = std::make_unique<FSCore>(*this);
   AddDevice(std::make_unique<FSDevice>(*this, *m_fs_core, "/dev/fs"));
@@ -649,6 +652,20 @@ std::shared_ptr<Device> EmulationKernel::GetDeviceByName(std::string_view device
   return iterator != m_device_map.end() ? iterator->second : nullptr;
 }
 
+std::shared_ptr<Device> EmulationKernel::GetDeviceByFileDescriptor(const int fd)
+{
+  if (fd < IPC_MAX_FDS)
+    return m_fdmap[fd];
+
+  switch (fd)
+  {
+  case 0x10001:
+    return GetDeviceByName("/dev/sha");
+  default:
+    return nullptr;
+  }
+}
+
 // Returns the FD for the newly opened device (on success) or an error code.
 std::optional<IPCReply> EmulationKernel::OpenDevice(OpenRequest& request)
 {
@@ -703,7 +720,7 @@ std::optional<IPCReply> EmulationKernel::HandleIPCCommand(const Request& request
     return OpenDevice(open_request);
   }
 
-  const auto device = (request.fd < IPC_MAX_FDS) ? m_fdmap[request.fd] : nullptr;
+  const auto device = GetDeviceByFileDescriptor(request.fd);
   if (!device)
     return IPCReply{IPC_EINVAL, 550_tbticks};
 
@@ -713,7 +730,9 @@ std::optional<IPCReply> EmulationKernel::HandleIPCCommand(const Request& request
   switch (request.command)
   {
   case IPC_CMD_CLOSE:
-    m_fdmap[request.fd].reset();
+    // if the fd is not a special IOS FD, we need to reset it too
+    if (request.fd < IPC_MAX_FDS)
+      m_fdmap[request.fd].reset();
     ret = device->Close(request.fd);
     break;
   case IPC_CMD_READ:

Source/Core/Core/IOS/IOS.h

@@ -154,6 +154,7 @@ public:
   // Get a resource manager by name.
   // This only works for devices which are part of the device map.
   std::shared_ptr<Device> GetDeviceByName(std::string_view device_name);
+  std::shared_ptr<Device> GetDeviceByFileDescriptor(const int fd);
 
   std::shared_ptr<FSDevice> GetFSDevice();
   std::shared_ptr<ESDevice> GetESDevice();

Source/Core/DolphinLib.props

@@ -343,6 +343,7 @@
     <ClInclude Include="Core\HW\WiimoteReal\WiimoteReal.h" />
     <ClInclude Include="Core\HW\WiiSave.h" />
     <ClInclude Include="Core\HW\WiiSaveStructs.h" />
+    <ClInclude Include="Core\IOS\Crypto\Sha.h" />
     <ClInclude Include="Core\IOS\Device.h" />
     <ClInclude Include="Core\IOS\DeviceStub.h" />
     <ClInclude Include="Core\IOS\DI\DI.h" />
@@ -983,6 +984,7 @@
     <ClCompile Include="Core\HW\WiimoteReal\IOWin.cpp" />
     <ClCompile Include="Core\HW\WiimoteReal\WiimoteReal.cpp" />
     <ClCompile Include="Core\HW\WiiSave.cpp" />
+    <ClCompile Include="Core\IOS\Crypto\Sha.cpp" />
     <ClCompile Include="Core\IOS\Device.cpp" />
     <ClCompile Include="Core\IOS\DeviceStub.cpp" />
     <ClCompile Include="Core\IOS\DI\DI.cpp" />