early-access version 1255

src/core/hle/service/acc/acc.cpp

@@ -0,0 +1,860 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include <algorithm>
+#include <array>
+#include "common/common_paths.h"
+#include "common/common_types.h"
+#include "common/file_util.h"
+#include "common/logging/log.h"
+#include "common/string_util.h"
+#include "common/swap.h"
+#include "core/constants.h"
+#include "core/core.h"
+#include "core/core_timing.h"
+#include "core/file_sys/control_metadata.h"
+#include "core/file_sys/patch_manager.h"
+#include "core/hle/ipc_helpers.h"
+#include "core/hle/kernel/kernel.h"
+#include "core/hle/kernel/process.h"
+#include "core/hle/service/acc/acc.h"
+#include "core/hle/service/acc/acc_aa.h"
+#include "core/hle/service/acc/acc_su.h"
+#include "core/hle/service/acc/acc_u0.h"
+#include "core/hle/service/acc/acc_u1.h"
+#include "core/hle/service/acc/errors.h"
+#include "core/hle/service/acc/profile_manager.h"
+#include "core/hle/service/glue/arp.h"
+#include "core/hle/service/glue/manager.h"
+#include "core/hle/service/sm/sm.h"
+#include "core/loader/loader.h"
+
+namespace Service::Account {
+
+constexpr ResultCode ERR_INVALID_BUFFER_SIZE{ErrorModule::Account, 30};
+constexpr ResultCode ERR_FAILED_SAVE_DATA{ErrorModule::Account, 100};
+
+static std::string GetImagePath(Common::UUID uuid) {
+    return Common::FS::GetUserPath(Common::FS::UserPath::NANDDir) +
+           "/system/save/8000000000000010/su/avators/" + uuid.FormatSwitch() + ".jpg";
+}
+
+static constexpr u32 SanitizeJPEGSize(std::size_t size) {
+    constexpr std::size_t max_jpeg_image_size = 0x20000;
+    return static_cast<u32>(std::min(size, max_jpeg_image_size));
+}
+
+class IManagerForSystemService final : public ServiceFramework<IManagerForSystemService> {
+public:
+    explicit IManagerForSystemService(Core::System& system_, Common::UUID)
+        : ServiceFramework{system_, "IManagerForSystemService"} {
+        // clang-format off
+        static const FunctionInfo functions[] = {
+            {0, nullptr, "CheckAvailability"},
+            {1, nullptr, "GetAccountId"},
+            {2, nullptr, "EnsureIdTokenCacheAsync"},
+            {3, nullptr, "LoadIdTokenCache"},
+            {100, nullptr, "SetSystemProgramIdentification"},
+            {101, nullptr, "RefreshNotificationTokenAsync"}, // 7.0.0+
+            {110, nullptr, "GetServiceEntryRequirementCache"}, // 4.0.0+
+            {111, nullptr, "InvalidateServiceEntryRequirementCache"}, // 4.0.0+
+            {112, nullptr, "InvalidateTokenCache"}, // 4.0.0 - 6.2.0
+            {113, nullptr, "GetServiceEntryRequirementCacheForOnlinePlay"}, // 6.1.0+
+            {120, nullptr, "GetNintendoAccountId"},
+            {121, nullptr, "CalculateNintendoAccountAuthenticationFingerprint"}, // 9.0.0+
+            {130, nullptr, "GetNintendoAccountUserResourceCache"},
+            {131, nullptr, "RefreshNintendoAccountUserResourceCacheAsync"},
+            {132, nullptr, "RefreshNintendoAccountUserResourceCacheAsyncIfSecondsElapsed"},
+            {133, nullptr, "GetNintendoAccountVerificationUrlCache"}, // 9.0.0+
+            {134, nullptr, "RefreshNintendoAccountVerificationUrlCache"}, // 9.0.0+
+            {135, nullptr, "RefreshNintendoAccountVerificationUrlCacheAsyncIfSecondsElapsed"}, // 9.0.0+
+            {140, nullptr, "GetNetworkServiceLicenseCache"}, // 5.0.0+
+            {141, nullptr, "RefreshNetworkServiceLicenseCacheAsync"}, // 5.0.0+
+            {142, nullptr, "RefreshNetworkServiceLicenseCacheAsyncIfSecondsElapsed"}, // 5.0.0+
+            {150, nullptr, "CreateAuthorizationRequest"},
+        };
+        // clang-format on
+
+        RegisterHandlers(functions);
+    }
+};
+
+// 3.0.0+
+class IFloatingRegistrationRequest final : public ServiceFramework<IFloatingRegistrationRequest> {
+public:
+    explicit IFloatingRegistrationRequest(Core::System& system_, Common::UUID)
+        : ServiceFramework{system_, "IFloatingRegistrationRequest"} {
+        // clang-format off
+        static const FunctionInfo functions[] = {
+            {0, nullptr, "GetSessionId"},
+            {12, nullptr, "GetAccountId"},
+            {13, nullptr, "GetLinkedNintendoAccountId"},
+            {14, nullptr, "GetNickname"},
+            {15, nullptr, "GetProfileImage"},
+            {21, nullptr, "LoadIdTokenCache"},
+            {100, nullptr, "RegisterUser"}, // [1.0.0-3.0.2] RegisterAsync
+            {101, nullptr, "RegisterUserWithUid"}, // [1.0.0-3.0.2] RegisterWithUidAsync
+            {102, nullptr, "RegisterNetworkServiceAccountAsync"}, // 4.0.0+
+            {103, nullptr, "RegisterNetworkServiceAccountWithUidAsync"}, // 4.0.0+
+            {110, nullptr, "SetSystemProgramIdentification"},
+            {111, nullptr, "EnsureIdTokenCacheAsync"},
+        };
+        // clang-format on
+
+        RegisterHandlers(functions);
+    }
+};
+
+class IAdministrator final : public ServiceFramework<IAdministrator> {
+public:
+    explicit IAdministrator(Core::System& system_, Common::UUID)
+        : ServiceFramework{system_, "IAdministrator"} {
+        // clang-format off
+        static const FunctionInfo functions[] = {
+            {0, nullptr, "CheckAvailability"},
+            {1, nullptr, "GetAccountId"},
+            {2, nullptr, "EnsureIdTokenCacheAsync"},
+            {3, nullptr, "LoadIdTokenCache"},
+            {100, nullptr, "SetSystemProgramIdentification"},
+            {101, nullptr, "RefreshNotificationTokenAsync"}, // 7.0.0+
+            {110, nullptr, "GetServiceEntryRequirementCache"}, // 4.0.0+
+            {111, nullptr, "InvalidateServiceEntryRequirementCache"}, // 4.0.0+
+            {112, nullptr, "InvalidateTokenCache"}, // 4.0.0 - 6.2.0
+            {113, nullptr, "GetServiceEntryRequirementCacheForOnlinePlay"}, // 6.1.0+
+            {120, nullptr, "GetNintendoAccountId"},
+            {121, nullptr, "CalculateNintendoAccountAuthenticationFingerprint"}, // 9.0.0+
+            {130, nullptr, "GetNintendoAccountUserResourceCache"},
+            {131, nullptr, "RefreshNintendoAccountUserResourceCacheAsync"},
+            {132, nullptr, "RefreshNintendoAccountUserResourceCacheAsyncIfSecondsElapsed"},
+            {133, nullptr, "GetNintendoAccountVerificationUrlCache"}, // 9.0.0+
+            {134, nullptr, "RefreshNintendoAccountVerificationUrlCacheAsync"}, // 9.0.0+
+            {135, nullptr, "RefreshNintendoAccountVerificationUrlCacheAsyncIfSecondsElapsed"}, // 9.0.0+
+            {140, nullptr, "GetNetworkServiceLicenseCache"}, // 5.0.0+
+            {141, nullptr, "RefreshNetworkServiceLicenseCacheAsync"}, // 5.0.0+
+            {142, nullptr, "RefreshNetworkServiceLicenseCacheAsyncIfSecondsElapsed"}, // 5.0.0+
+            {150, nullptr, "CreateAuthorizationRequest"},
+            {200, nullptr, "IsRegistered"},
+            {201, nullptr, "RegisterAsync"},
+            {202, nullptr, "UnregisterAsync"},
+            {203, nullptr, "DeleteRegistrationInfoLocally"},
+            {220, nullptr, "SynchronizeProfileAsync"},
+            {221, nullptr, "UploadProfileAsync"},
+            {222, nullptr, "SynchronizaProfileAsyncIfSecondsElapsed"},
+            {250, nullptr, "IsLinkedWithNintendoAccount"},
+            {251, nullptr, "CreateProcedureToLinkWithNintendoAccount"},
+            {252, nullptr, "ResumeProcedureToLinkWithNintendoAccount"},
+            {255, nullptr, "CreateProcedureToUpdateLinkageStateOfNintendoAccount"},
+            {256, nullptr, "ResumeProcedureToUpdateLinkageStateOfNintendoAccount"},
+            {260, nullptr, "CreateProcedureToLinkNnidWithNintendoAccount"}, // 3.0.0+
+            {261, nullptr, "ResumeProcedureToLinkNnidWithNintendoAccount"}, // 3.0.0+
+            {280, nullptr, "ProxyProcedureToAcquireApplicationAuthorizationForNintendoAccount"},
+            {290, nullptr, "GetRequestForNintendoAccountUserResourceView"}, // 8.0.0+
+            {300, nullptr, "TryRecoverNintendoAccountUserStateAsync"}, // 6.0.0+
+            {400, nullptr, "IsServiceEntryRequirementCacheRefreshRequiredForOnlinePlay"}, // 6.1.0+
+            {401, nullptr, "RefreshServiceEntryRequirementCacheForOnlinePlayAsync"}, // 6.1.0+
+            {900, nullptr, "GetAuthenticationInfoForWin"}, // 9.0.0+
+            {901, nullptr, "ImportAsyncForWin"}, // 9.0.0+
+            {997, nullptr, "DebugUnlinkNintendoAccountAsync"},
+            {998, nullptr, "DebugSetAvailabilityErrorDetail"},
+        };
+        // clang-format on
+
+        RegisterHandlers(functions);
+    }
+};
+
+class IAuthorizationRequest final : public ServiceFramework<IAuthorizationRequest> {
+public:
+    explicit IAuthorizationRequest(Core::System& system_, Common::UUID)
+        : ServiceFramework{system_, "IAuthorizationRequest"} {
+        // clang-format off
+        static const FunctionInfo functions[] = {
+            {0, nullptr, "GetSessionId"},
+            {10, nullptr, "InvokeWithoutInteractionAsync"},
+            {19, nullptr, "IsAuthorized"},
+            {20, nullptr, "GetAuthorizationCode"},
+            {21, nullptr, "GetIdToken"},
+            {22, nullptr, "GetState"},
+        };
+        // clang-format on
+
+        RegisterHandlers(functions);
+    }
+};
+
+class IOAuthProcedure final : public ServiceFramework<IOAuthProcedure> {
+public:
+    explicit IOAuthProcedure(Core::System& system_, Common::UUID)
+        : ServiceFramework{system_, "IOAuthProcedure"} {
+        // clang-format off
+        static const FunctionInfo functions[] = {
+            {0, nullptr, "PrepareAsync"},
+            {1, nullptr, "GetRequest"},
+            {2, nullptr, "ApplyResponse"},
+            {3, nullptr, "ApplyResponseAsync"},
+            {10, nullptr, "Suspend"},
+        };
+        // clang-format on
+
+        RegisterHandlers(functions);
+    }
+};
+
+// 3.0.0+
+class IOAuthProcedureForExternalNsa final : public ServiceFramework<IOAuthProcedureForExternalNsa> {
+public:
+    explicit IOAuthProcedureForExternalNsa(Core::System& system_, Common::UUID)
+        : ServiceFramework{system_, "IOAuthProcedureForExternalNsa"} {
+        // clang-format off
+        static const FunctionInfo functions[] = {
+            {0, nullptr, "PrepareAsync"},
+            {1, nullptr, "GetRequest"},
+            {2, nullptr, "ApplyResponse"},
+            {3, nullptr, "ApplyResponseAsync"},
+            {10, nullptr, "Suspend"},
+            {100, nullptr, "GetAccountId"},
+            {101, nullptr, "GetLinkedNintendoAccountId"},
+            {102, nullptr, "GetNickname"},
+            {103, nullptr, "GetProfileImage"},
+        };
+        // clang-format on
+
+        RegisterHandlers(functions);
+    }
+};
+
+class IOAuthProcedureForNintendoAccountLinkage final
+    : public ServiceFramework<IOAuthProcedureForNintendoAccountLinkage> {
+public:
+    explicit IOAuthProcedureForNintendoAccountLinkage(Core::System& system_, Common::UUID)
+        : ServiceFramework{system_, "IOAuthProcedureForNintendoAccountLinkage"} {
+        // clang-format off
+        static const FunctionInfo functions[] = {
+            {0, nullptr, "PrepareAsync"},
+            {1, nullptr, "GetRequest"},
+            {2, nullptr, "ApplyResponse"},
+            {3, nullptr, "ApplyResponseAsync"},
+            {10, nullptr, "Suspend"},
+            {100, nullptr, "GetRequestWithTheme"},
+            {101, nullptr, "IsNetworkServiceAccountReplaced"},
+            {199, nullptr, "GetUrlForIntroductionOfExtraMembership"}, // 2.0.0 - 5.1.0
+        };
+        // clang-format on
+
+        RegisterHandlers(functions);
+    }
+};
+
+class INotifier final : public ServiceFramework<INotifier> {
+public:
+    explicit INotifier(Core::System& system_, Common::UUID)
+        : ServiceFramework{system_, "INotifier"} {
+        // clang-format off
+        static const FunctionInfo functions[] = {
+            {0, nullptr, "GetSystemEvent"},
+        };
+        // clang-format on
+
+        RegisterHandlers(functions);
+    }
+};
+
+class IProfileCommon : public ServiceFramework<IProfileCommon> {
+public:
+    explicit IProfileCommon(Core::System& system_, const char* name, bool editor_commands,
+                            Common::UUID user_id_, ProfileManager& profile_manager_)
+        : ServiceFramework{system_, name}, profile_manager{profile_manager_}, user_id{user_id_} {
+        static const FunctionInfo functions[] = {
+            {0, &IProfileCommon::Get, "Get"},
+            {1, &IProfileCommon::GetBase, "GetBase"},
+            {10, &IProfileCommon::GetImageSize, "GetImageSize"},
+            {11, &IProfileCommon::LoadImage, "LoadImage"},
+        };
+
+        RegisterHandlers(functions);
+
+        if (editor_commands) {
+            static const FunctionInfo editor_functions[] = {
+                {100, &IProfileCommon::Store, "Store"},
+                {101, &IProfileCommon::StoreWithImage, "StoreWithImage"},
+            };
+
+            RegisterHandlers(editor_functions);
+        }
+    }
+
+protected:
+    void Get(Kernel::HLERequestContext& ctx) {
+        LOG_DEBUG(Service_ACC, "called user_id={}", user_id.Format());
+        ProfileBase profile_base{};
+        ProfileData data{};
+        if (profile_manager.GetProfileBaseAndData(user_id, profile_base, data)) {
+            ctx.WriteBuffer(data);
+            IPC::ResponseBuilder rb{ctx, 16};
+            rb.Push(RESULT_SUCCESS);
+            rb.PushRaw(profile_base);
+        } else {
+            LOG_ERROR(Service_ACC, "Failed to get profile base and data for user={}",
+                      user_id.Format());
+            IPC::ResponseBuilder rb{ctx, 2};
+            rb.Push(RESULT_UNKNOWN); // TODO(ogniK): Get actual error code
+        }
+    }
+
+    void GetBase(Kernel::HLERequestContext& ctx) {
+        LOG_DEBUG(Service_ACC, "called user_id={}", user_id.Format());
+        ProfileBase profile_base{};
+        if (profile_manager.GetProfileBase(user_id, profile_base)) {
+            IPC::ResponseBuilder rb{ctx, 16};
+            rb.Push(RESULT_SUCCESS);
+            rb.PushRaw(profile_base);
+        } else {
+            LOG_ERROR(Service_ACC, "Failed to get profile base for user={}", user_id.Format());
+            IPC::ResponseBuilder rb{ctx, 2};
+            rb.Push(RESULT_UNKNOWN); // TODO(ogniK): Get actual error code
+        }
+    }
+
+    void LoadImage(Kernel::HLERequestContext& ctx) {
+        LOG_DEBUG(Service_ACC, "called");
+
+        IPC::ResponseBuilder rb{ctx, 3};
+        rb.Push(RESULT_SUCCESS);
+
+        const Common::FS::IOFile image(GetImagePath(user_id), "rb");
+        if (!image.IsOpen()) {
+            LOG_WARNING(Service_ACC,
+                        "Failed to load user provided image! Falling back to built-in backup...");
+            ctx.WriteBuffer(Core::Constants::ACCOUNT_BACKUP_JPEG);
+            rb.Push(SanitizeJPEGSize(Core::Constants::ACCOUNT_BACKUP_JPEG.size()));
+            return;
+        }
+
+        const u32 size = SanitizeJPEGSize(image.GetSize());
+        std::vector<u8> buffer(size);
+        image.ReadBytes(buffer.data(), buffer.size());
+
+        ctx.WriteBuffer(buffer);
+        rb.Push<u32>(size);
+    }
+
+    void GetImageSize(Kernel::HLERequestContext& ctx) {
+        LOG_DEBUG(Service_ACC, "called");
+        IPC::ResponseBuilder rb{ctx, 3};
+        rb.Push(RESULT_SUCCESS);
+
+        const Common::FS::IOFile image(GetImagePath(user_id), "rb");
+
+        if (!image.IsOpen()) {
+            LOG_WARNING(Service_ACC,
+                        "Failed to load user provided image! Falling back to built-in backup...");
+            rb.Push(SanitizeJPEGSize(Core::Constants::ACCOUNT_BACKUP_JPEG.size()));
+        } else {
+            rb.Push(SanitizeJPEGSize(image.GetSize()));
+        }
+    }
+
+    void Store(Kernel::HLERequestContext& ctx) {
+        IPC::RequestParser rp{ctx};
+        const auto base = rp.PopRaw<ProfileBase>();
+
+        const auto user_data = ctx.ReadBuffer();
+
+        LOG_DEBUG(Service_ACC, "called, username='{}', timestamp={:016X}, uuid={}",
+                  Common::StringFromFixedZeroTerminatedBuffer(
+                      reinterpret_cast<const char*>(base.username.data()), base.username.size()),
+                  base.timestamp, base.user_uuid.Format());
+
+        if (user_data.size() < sizeof(ProfileData)) {
+            LOG_ERROR(Service_ACC, "ProfileData buffer too small!");
+            IPC::ResponseBuilder rb{ctx, 2};
+            rb.Push(ERR_INVALID_BUFFER_SIZE);
+            return;
+        }
+
+        ProfileData data;
+        std::memcpy(&data, user_data.data(), sizeof(ProfileData));
+
+        if (!profile_manager.SetProfileBaseAndData(user_id, base, data)) {
+            LOG_ERROR(Service_ACC, "Failed to update profile data and base!");
+            IPC::ResponseBuilder rb{ctx, 2};
+            rb.Push(ERR_FAILED_SAVE_DATA);
+            return;
+        }
+
+        IPC::ResponseBuilder rb{ctx, 2};
+        rb.Push(RESULT_SUCCESS);
+    }
+
+    void StoreWithImage(Kernel::HLERequestContext& ctx) {
+        IPC::RequestParser rp{ctx};
+        const auto base = rp.PopRaw<ProfileBase>();
+
+        const auto user_data = ctx.ReadBuffer();
+        const auto image_data = ctx.ReadBuffer(1);
+
+        LOG_DEBUG(Service_ACC, "called, username='{}', timestamp={:016X}, uuid={}",
+                  Common::StringFromFixedZeroTerminatedBuffer(
+                      reinterpret_cast<const char*>(base.username.data()), base.username.size()),
+                  base.timestamp, base.user_uuid.Format());
+
+        if (user_data.size() < sizeof(ProfileData)) {
+            LOG_ERROR(Service_ACC, "ProfileData buffer too small!");
+            IPC::ResponseBuilder rb{ctx, 2};
+            rb.Push(ERR_INVALID_BUFFER_SIZE);
+            return;
+        }
+
+        ProfileData data;
+        std::memcpy(&data, user_data.data(), sizeof(ProfileData));
+
+        Common::FS::IOFile image(GetImagePath(user_id), "wb");
+
+        if (!image.IsOpen() || !image.Resize(image_data.size()) ||
+            image.WriteBytes(image_data.data(), image_data.size()) != image_data.size() ||
+            !profile_manager.SetProfileBaseAndData(user_id, base, data)) {
+            LOG_ERROR(Service_ACC, "Failed to update profile data, base, and image!");
+            IPC::ResponseBuilder rb{ctx, 2};
+            rb.Push(ERR_FAILED_SAVE_DATA);
+            return;
+        }
+
+        IPC::ResponseBuilder rb{ctx, 2};
+        rb.Push(RESULT_SUCCESS);
+    }
+
+    ProfileManager& profile_manager;
+    Common::UUID user_id{Common::INVALID_UUID}; ///< The user id this profile refers to.
+};
+
+class IProfile final : public IProfileCommon {
+public:
+    explicit IProfile(Core::System& system_, Common::UUID user_id_,
+                      ProfileManager& profile_manager_)
+        : IProfileCommon{system_, "IProfile", false, user_id_, profile_manager_} {}
+};
+
+class IProfileEditor final : public IProfileCommon {
+public:
+    explicit IProfileEditor(Core::System& system_, Common::UUID user_id_,
+                            ProfileManager& profile_manager_)
+        : IProfileCommon{system_, "IProfileEditor", true, user_id_, profile_manager_} {}
+};
+
+class IAsyncContext final : public ServiceFramework<IAsyncContext> {
+public:
+    explicit IAsyncContext(Core::System& system_) : ServiceFramework{system_, "IAsyncContext"} {
+        // clang-format off
+        static const FunctionInfo functions[] = {
+            {0, nullptr, "GetSystemEvent"},
+            {1, nullptr, "Cancel"},
+            {2, nullptr, "HasDone"},
+            {3, nullptr, "GetResult"},
+        };
+        // clang-format on
+
+        RegisterHandlers(functions);
+    }
+};
+
+class ISessionObject final : public ServiceFramework<ISessionObject> {
+public:
+    explicit ISessionObject(Core::System& system_, Common::UUID)
+        : ServiceFramework{system_, "ISessionObject"} {
+        // clang-format off
+        static const FunctionInfo functions[] = {
+            {999, nullptr, "Dummy"},
+        };
+        // clang-format on
+
+        RegisterHandlers(functions);
+    }
+};
+
+class IGuestLoginRequest final : public ServiceFramework<IGuestLoginRequest> {
+public:
+    explicit IGuestLoginRequest(Core::System& system_, Common::UUID)
+        : ServiceFramework{system_, "IGuestLoginRequest"} {
+        // clang-format off
+        static const FunctionInfo functions[] = {
+            {0, nullptr, "GetSessionId"},
+            {11, nullptr, "Unknown"}, // 1.0.0 - 2.3.0 (the name is blank on Switchbrew)
+            {12, nullptr, "GetAccountId"},
+            {13, nullptr, "GetLinkedNintendoAccountId"},
+            {14, nullptr, "GetNickname"},
+            {15, nullptr, "GetProfileImage"},
+            {21, nullptr, "LoadIdTokenCache"}, // 3.0.0+
+        };
+        // clang-format on
+
+        RegisterHandlers(functions);
+    }
+};
+
+class IManagerForApplication final : public ServiceFramework<IManagerForApplication> {
+public:
+    explicit IManagerForApplication(Core::System& system_, Common::UUID user_id_)
+        : ServiceFramework{system_, "IManagerForApplication"}, user_id{user_id_} {
+        // clang-format off
+        static const FunctionInfo functions[] = {
+            {0, &IManagerForApplication::CheckAvailability, "CheckAvailability"},
+            {1, &IManagerForApplication::GetAccountId, "GetAccountId"},
+            {2, nullptr, "EnsureIdTokenCacheAsync"},
+            {3, nullptr, "LoadIdTokenCache"},
+            {130, nullptr, "GetNintendoAccountUserResourceCacheForApplication"},
+            {150, nullptr, "CreateAuthorizationRequest"},
+            {160, &IManagerForApplication::StoreOpenContext, "StoreOpenContext"},
+            {170, nullptr, "LoadNetworkServiceLicenseKindAsync"},
+        };
+        // clang-format on
+
+        RegisterHandlers(functions);
+    }
+
+private:
+    void CheckAvailability(Kernel::HLERequestContext& ctx) {
+        LOG_WARNING(Service_ACC, "(STUBBED) called");
+        IPC::ResponseBuilder rb{ctx, 3};
+        rb.Push(RESULT_SUCCESS);
+        rb.Push(false); // TODO: Check when this is supposed to return true and when not
+    }
+
+    void GetAccountId(Kernel::HLERequestContext& ctx) {
+        LOG_DEBUG(Service_ACC, "called");
+
+        IPC::ResponseBuilder rb{ctx, 4};
+        rb.Push(RESULT_SUCCESS);
+        rb.PushRaw<u64>(user_id.GetNintendoID());
+    }
+
+    void StoreOpenContext(Kernel::HLERequestContext& ctx) {
+        LOG_WARNING(Service_ACC, "(STUBBED) called");
+        IPC::ResponseBuilder rb{ctx, 2};
+        rb.Push(RESULT_SUCCESS);
+    }
+
+    Common::UUID user_id;
+};
+
+// 6.0.0+
+class IAsyncNetworkServiceLicenseKindContext final
+    : public ServiceFramework<IAsyncNetworkServiceLicenseKindContext> {
+public:
+    explicit IAsyncNetworkServiceLicenseKindContext(Core::System& system_, Common::UUID)
+        : ServiceFramework{system_, "IAsyncNetworkServiceLicenseKindContext"} {
+        // clang-format off
+        static const FunctionInfo functions[] = {
+            {0, nullptr, "GetSystemEvent"},
+            {1, nullptr, "Cancel"},
+            {2, nullptr, "HasDone"},
+            {3, nullptr, "GetResult"},
+            {4, nullptr, "GetNetworkServiceLicenseKind"},
+        };
+        // clang-format on
+
+        RegisterHandlers(functions);
+    }
+};
+
+// 8.0.0+
+class IOAuthProcedureForUserRegistration final
+    : public ServiceFramework<IOAuthProcedureForUserRegistration> {
+public:
+    explicit IOAuthProcedureForUserRegistration(Core::System& system_, Common::UUID)
+        : ServiceFramework{system_, "IOAuthProcedureForUserRegistration"} {
+        // clang-format off
+        static const FunctionInfo functions[] = {
+            {0, nullptr, "PrepareAsync"},
+            {1, nullptr, "GetRequest"},
+            {2, nullptr, "ApplyResponse"},
+            {3, nullptr, "ApplyResponseAsync"},
+            {10, nullptr, "Suspend"},
+            {100, nullptr, "GetAccountId"},
+            {101, nullptr, "GetLinkedNintendoAccountId"},
+            {102, nullptr, "GetNickname"},
+            {103, nullptr, "GetProfileImage"},
+            {110, nullptr, "RegisterUserAsync"},
+            {111, nullptr, "GetUid"},
+        };
+        // clang-format on
+
+        RegisterHandlers(functions);
+    }
+};
+
+class DAUTH_O final : public ServiceFramework<DAUTH_O> {
+public:
+    explicit DAUTH_O(Core::System& system_, Common::UUID) : ServiceFramework{system_, "dauth:o"} {
+        // clang-format off
+        static const FunctionInfo functions[] = {
+            {0, nullptr, "EnsureAuthenticationTokenCacheAsync"}, // [5.0.0-5.1.0] GeneratePostData
+            {1, nullptr, "LoadAuthenticationTokenCache"}, // 6.0.0+
+            {2, nullptr, "InvalidateAuthenticationTokenCache"}, // 6.0.0+
+            {10, nullptr, "EnsureEdgeTokenCacheAsync"}, // 6.0.0+
+            {11, nullptr, "LoadEdgeTokenCache"}, // 6.0.0+
+            {12, nullptr, "InvalidateEdgeTokenCache"}, // 6.0.0+
+        };
+        // clang-format on
+
+        RegisterHandlers(functions);
+    }
+};
+
+// 6.0.0+
+class IAsyncResult final : public ServiceFramework<IAsyncResult> {
+public:
+    explicit IAsyncResult(Core::System& system_, Common::UUID)
+        : ServiceFramework{system_, "IAsyncResult"} {
+        // clang-format off
+        static const FunctionInfo functions[] = {
+            {0, nullptr, "GetResult"},
+            {1, nullptr, "Cancel"},
+            {2, nullptr, "IsAvailable"},
+            {3, nullptr, "GetSystemEvent"},
+        };
+        // clang-format on
+
+        RegisterHandlers(functions);
+    }
+};
+
+void Module::Interface::GetUserCount(Kernel::HLERequestContext& ctx) {
+    LOG_DEBUG(Service_ACC, "called");
+    IPC::ResponseBuilder rb{ctx, 3};
+    rb.Push(RESULT_SUCCESS);
+    rb.Push<u32>(static_cast<u32>(profile_manager->GetUserCount()));
+}
+
+void Module::Interface::GetUserExistence(Kernel::HLERequestContext& ctx) {
+    IPC::RequestParser rp{ctx};
+    Common::UUID user_id = rp.PopRaw<Common::UUID>();
+    LOG_DEBUG(Service_ACC, "called user_id={}", user_id.Format());
+
+    IPC::ResponseBuilder rb{ctx, 3};
+    rb.Push(RESULT_SUCCESS);
+    rb.Push(profile_manager->UserExists(user_id));
+}
+
+void Module::Interface::ListAllUsers(Kernel::HLERequestContext& ctx) {
+    LOG_DEBUG(Service_ACC, "called");
+    ctx.WriteBuffer(profile_manager->GetAllUsers());
+    IPC::ResponseBuilder rb{ctx, 2};
+    rb.Push(RESULT_SUCCESS);
+}
+
+void Module::Interface::ListOpenUsers(Kernel::HLERequestContext& ctx) {
+    LOG_DEBUG(Service_ACC, "called");
+    ctx.WriteBuffer(profile_manager->GetOpenUsers());
+    IPC::ResponseBuilder rb{ctx, 2};
+    rb.Push(RESULT_SUCCESS);
+}
+
+void Module::Interface::GetLastOpenedUser(Kernel::HLERequestContext& ctx) {
+    LOG_DEBUG(Service_ACC, "called");
+    IPC::ResponseBuilder rb{ctx, 6};
+    rb.Push(RESULT_SUCCESS);
+    rb.PushRaw<Common::UUID>(profile_manager->GetLastOpenedUser());
+}
+
+void Module::Interface::GetProfile(Kernel::HLERequestContext& ctx) {
+    IPC::RequestParser rp{ctx};
+    Common::UUID user_id = rp.PopRaw<Common::UUID>();
+    LOG_DEBUG(Service_ACC, "called user_id={}", user_id.Format());
+
+    IPC::ResponseBuilder rb{ctx, 2, 0, 1};
+    rb.Push(RESULT_SUCCESS);
+    rb.PushIpcInterface<IProfile>(system, user_id, *profile_manager);
+}
+
+void Module::Interface::IsUserRegistrationRequestPermitted(Kernel::HLERequestContext& ctx) {
+    LOG_WARNING(Service_ACC, "(STUBBED) called");
+    IPC::ResponseBuilder rb{ctx, 3};
+    rb.Push(RESULT_SUCCESS);
+    rb.Push(profile_manager->CanSystemRegisterUser());
+}
+
+void Module::Interface::InitializeApplicationInfo(Kernel::HLERequestContext& ctx) {
+    IPC::RequestParser rp{ctx};
+
+    LOG_DEBUG(Service_ACC, "called");
+    IPC::ResponseBuilder rb{ctx, 2};
+    rb.Push(InitializeApplicationInfoBase());
+}
+
+void Module::Interface::InitializeApplicationInfoRestricted(Kernel::HLERequestContext& ctx) {
+    IPC::RequestParser rp{ctx};
+
+    LOG_WARNING(Service_ACC, "(Partial implementation) called");
+
+    // TODO(ogniK): We require checking if the user actually owns the title and what not. As of
+    // currently, we assume the user owns the title. InitializeApplicationInfoBase SHOULD be called
+    // first then we do extra checks if the game is a digital copy.
+
+    IPC::ResponseBuilder rb{ctx, 2};
+    rb.Push(InitializeApplicationInfoBase());
+}
+
+ResultCode Module::Interface::InitializeApplicationInfoBase() {
+    if (application_info) {
+        LOG_ERROR(Service_ACC, "Application already initialized");
+        return ERR_ACCOUNTINFO_ALREADY_INITIALIZED;
+    }
+
+    // TODO(ogniK): This should be changed to reflect the target process for when we have multiple
+    // processes emulated. As we don't actually have pid support we should assume we're just using
+    // our own process
+    const auto& current_process = system.Kernel().CurrentProcess();
+    const auto launch_property =
+        system.GetARPManager().GetLaunchProperty(current_process->GetTitleID());
+
+    if (launch_property.Failed()) {
+        LOG_ERROR(Service_ACC, "Failed to get launch property");
+        return ERR_ACCOUNTINFO_BAD_APPLICATION;
+    }
+
+    switch (launch_property->base_game_storage_id) {
+    case FileSys::StorageId::GameCard:
+        application_info.application_type = ApplicationType::GameCard;
+        break;
+    case FileSys::StorageId::Host:
+    case FileSys::StorageId::NandUser:
+    case FileSys::StorageId::SdCard:
+    case FileSys::StorageId::None: // Yuzu specific, differs from hardware
+        application_info.application_type = ApplicationType::Digital;
+        break;
+    default:
+        LOG_ERROR(Service_ACC, "Invalid game storage ID! storage_id={}",
+                  launch_property->base_game_storage_id);
+        return ERR_ACCOUNTINFO_BAD_APPLICATION;
+    }
+
+    LOG_WARNING(Service_ACC, "ApplicationInfo init required");
+    // TODO(ogniK): Actual initalization here
+
+    return RESULT_SUCCESS;
+}
+
+void Module::Interface::GetBaasAccountManagerForApplication(Kernel::HLERequestContext& ctx) {
+    LOG_DEBUG(Service_ACC, "called");
+    IPC::ResponseBuilder rb{ctx, 2, 0, 1};
+    rb.Push(RESULT_SUCCESS);
+    rb.PushIpcInterface<IManagerForApplication>(system, profile_manager->GetLastOpenedUser());
+}
+
+void Module::Interface::IsUserAccountSwitchLocked(Kernel::HLERequestContext& ctx) {
+    LOG_DEBUG(Service_ACC, "called");
+    FileSys::NACP nacp;
+    const auto res = system.GetAppLoader().ReadControlData(nacp);
+
+    bool is_locked = false;
+
+    if (res != Loader::ResultStatus::Success) {
+        const FileSys::PatchManager pm{system.CurrentProcess()->GetTitleID(),
+                                       system.GetFileSystemController(),
+                                       system.GetContentProvider()};
+        const auto nacp_unique = pm.GetControlMetadata().first;
+
+        if (nacp_unique != nullptr) {
+            is_locked = nacp_unique->GetUserAccountSwitchLock();
+        } else {
+            LOG_ERROR(Service_ACC, "nacp_unique is null!");
+        }
+    } else {
+        is_locked = nacp.GetUserAccountSwitchLock();
+    }
+
+    IPC::ResponseBuilder rb{ctx, 3};
+    rb.Push(RESULT_SUCCESS);
+    rb.Push(is_locked);
+}
+
+void Module::Interface::GetProfileEditor(Kernel::HLERequestContext& ctx) {
+    IPC::RequestParser rp{ctx};
+    Common::UUID user_id = rp.PopRaw<Common::UUID>();
+
+    LOG_DEBUG(Service_ACC, "called, user_id={}", user_id.Format());
+
+    IPC::ResponseBuilder rb{ctx, 2, 0, 1};
+    rb.Push(RESULT_SUCCESS);
+    rb.PushIpcInterface<IProfileEditor>(system, user_id, *profile_manager);
+}
+
+void Module::Interface::ListQualifiedUsers(Kernel::HLERequestContext& ctx) {
+    LOG_DEBUG(Service_ACC, "called");
+
+    // All users should be qualified. We don't actually have parental control or anything to do with
+    // nintendo online currently. We're just going to assume the user running the game has access to
+    // the game regardless of parental control settings.
+    ctx.WriteBuffer(profile_manager->GetAllUsers());
+    IPC::ResponseBuilder rb{ctx, 2};
+    rb.Push(RESULT_SUCCESS);
+}
+
+void Module::Interface::LoadOpenContext(Kernel::HLERequestContext& ctx) {
+    LOG_WARNING(Service_ACC, "(STUBBED) called");
+
+    // This is similar to GetBaasAccountManagerForApplication
+    // This command is used concurrently with ListOpenContextStoredUsers
+    // TODO: Find the differences between this and GetBaasAccountManagerForApplication
+    IPC::ResponseBuilder rb{ctx, 2, 0, 1};
+    rb.Push(RESULT_SUCCESS);
+    rb.PushIpcInterface<IManagerForApplication>(system, profile_manager->GetLastOpenedUser());
+}
+
+void Module::Interface::ListOpenContextStoredUsers(Kernel::HLERequestContext& ctx) {
+    LOG_WARNING(Service_ACC, "(STUBBED) called");
+
+    // TODO(ogniK): Handle open contexts
+    ctx.WriteBuffer(profile_manager->GetOpenUsers());
+    IPC::ResponseBuilder rb{ctx, 2};
+    rb.Push(RESULT_SUCCESS);
+}
+
+void Module::Interface::TrySelectUserWithoutInteraction(Kernel::HLERequestContext& ctx) {
+    LOG_DEBUG(Service_ACC, "called");
+    // A u8 is passed into this function which we can safely ignore. It's to determine if we have
+    // access to use the network or not by the looks of it
+    IPC::ResponseBuilder rb{ctx, 6};
+    if (profile_manager->GetUserCount() != 1) {
+        rb.Push(RESULT_SUCCESS);
+        rb.PushRaw<u128>(Common::INVALID_UUID);
+        return;
+    }
+
+    const auto user_list = profile_manager->GetAllUsers();
+    if (std::all_of(user_list.begin(), user_list.end(),
+                    [](const auto& user) { return user.uuid == Common::INVALID_UUID; })) {
+        rb.Push(RESULT_UNKNOWN); // TODO(ogniK): Find the correct error code
+        rb.PushRaw<u128>(Common::INVALID_UUID);
+        return;
+    }
+
+    // Select the first user we have
+    rb.Push(RESULT_SUCCESS);
+    rb.PushRaw<u128>(profile_manager->GetUser(0)->uuid);
+}
+
+Module::Interface::Interface(std::shared_ptr<Module> module_,
+                             std::shared_ptr<ProfileManager> profile_manager_,
+                             Core::System& system_, const char* name)
+    : ServiceFramework{system_, name}, module{std::move(module_)}, profile_manager{std::move(
+                                                                       profile_manager_)} {}
+
+Module::Interface::~Interface() = default;
+
+void InstallInterfaces(Core::System& system) {
+    auto module = std::make_shared<Module>();
+    auto profile_manager = std::make_shared<ProfileManager>();
+
+    std::make_shared<ACC_AA>(module, profile_manager, system)
+        ->InstallAsService(system.ServiceManager());
+    std::make_shared<ACC_SU>(module, profile_manager, system)
+        ->InstallAsService(system.ServiceManager());
+    std::make_shared<ACC_U0>(module, profile_manager, system)
+        ->InstallAsService(system.ServiceManager());
+    std::make_shared<ACC_U1>(module, profile_manager, system)
+        ->InstallAsService(system.ServiceManager());
+}
+
+} // namespace Service::Account

src/core/hle/service/acc/acc.h

@@ -0,0 +1,69 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "core/hle/service/glue/manager.h"
+#include "core/hle/service/service.h"
+
+namespace Service::Account {
+
+class ProfileManager;
+
+class Module final {
+public:
+    class Interface : public ServiceFramework<Interface> {
+    public:
+        explicit Interface(std::shared_ptr<Module> module_,
+                           std::shared_ptr<ProfileManager> profile_manager_, Core::System& system_,
+                           const char* name);
+        ~Interface() override;
+
+        void GetUserCount(Kernel::HLERequestContext& ctx);
+        void GetUserExistence(Kernel::HLERequestContext& ctx);
+        void ListAllUsers(Kernel::HLERequestContext& ctx);
+        void ListOpenUsers(Kernel::HLERequestContext& ctx);
+        void GetLastOpenedUser(Kernel::HLERequestContext& ctx);
+        void GetProfile(Kernel::HLERequestContext& ctx);
+        void InitializeApplicationInfo(Kernel::HLERequestContext& ctx);
+        void InitializeApplicationInfoRestricted(Kernel::HLERequestContext& ctx);
+        void GetBaasAccountManagerForApplication(Kernel::HLERequestContext& ctx);
+        void IsUserRegistrationRequestPermitted(Kernel::HLERequestContext& ctx);
+        void TrySelectUserWithoutInteraction(Kernel::HLERequestContext& ctx);
+        void IsUserAccountSwitchLocked(Kernel::HLERequestContext& ctx);
+        void GetProfileEditor(Kernel::HLERequestContext& ctx);
+        void ListQualifiedUsers(Kernel::HLERequestContext& ctx);
+        void LoadOpenContext(Kernel::HLERequestContext& ctx);
+        void ListOpenContextStoredUsers(Kernel::HLERequestContext& ctx);
+
+    private:
+        ResultCode InitializeApplicationInfoBase();
+
+        enum class ApplicationType : u32_le {
+            GameCard = 0,
+            Digital = 1,
+            Unknown = 3,
+        };
+
+        struct ApplicationInfo {
+            Service::Glue::ApplicationLaunchProperty launch_property;
+            ApplicationType application_type;
+
+            constexpr explicit operator bool() const {
+                return launch_property.title_id != 0x0;
+            }
+        };
+
+        ApplicationInfo application_info{};
+
+    protected:
+        std::shared_ptr<Module> module;
+        std::shared_ptr<ProfileManager> profile_manager;
+    };
+};
+
+/// Registers all ACC services with the specified service manager.
+void InstallInterfaces(Core::System& system);
+
+} // namespace Service::Account

src/core/hle/service/acc/acc_aa.cpp

@@ -0,0 +1,24 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "core/hle/service/acc/acc_aa.h"
+
+namespace Service::Account {
+
+ACC_AA::ACC_AA(std::shared_ptr<Module> module, std::shared_ptr<ProfileManager> profile_manager,
+               Core::System& system)
+    : Module::Interface(std::move(module), std::move(profile_manager), system, "acc:aa") {
+    static const FunctionInfo functions[] = {
+        {0, nullptr, "EnsureCacheAsync"},
+        {1, nullptr, "LoadCache"},
+        {2, nullptr, "GetDeviceAccountId"},
+        {50, nullptr, "RegisterNotificationTokenAsync"},   // 1.0.0 - 6.2.0
+        {51, nullptr, "UnregisterNotificationTokenAsync"}, // 1.0.0 - 6.2.0
+    };
+    RegisterHandlers(functions);
+}
+
+ACC_AA::~ACC_AA() = default;
+
+} // namespace Service::Account

src/core/hle/service/acc/acc_aa.h

@@ -0,0 +1,18 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "core/hle/service/acc/acc.h"
+
+namespace Service::Account {
+
+class ACC_AA final : public Module::Interface {
+public:
+    explicit ACC_AA(std::shared_ptr<Module> module, std::shared_ptr<ProfileManager> profile_manager,
+                    Core::System& system);
+    ~ACC_AA() override;
+};
+
+} // namespace Service::Account

src/core/hle/service/acc/acc_su.cpp

@@ -0,0 +1,68 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "core/hle/service/acc/acc_su.h"
+
+namespace Service::Account {
+
+ACC_SU::ACC_SU(std::shared_ptr<Module> module, std::shared_ptr<ProfileManager> profile_manager,
+               Core::System& system)
+    : Module::Interface(std::move(module), std::move(profile_manager), system, "acc:su") {
+    // clang-format off
+    static const FunctionInfo functions[] = {
+        {0, &ACC_SU::GetUserCount, "GetUserCount"},
+        {1, &ACC_SU::GetUserExistence, "GetUserExistence"},
+        {2, &ACC_SU::ListAllUsers, "ListAllUsers"},
+        {3, &ACC_SU::ListOpenUsers, "ListOpenUsers"},
+        {4, &ACC_SU::GetLastOpenedUser, "GetLastOpenedUser"},
+        {5, &ACC_SU::GetProfile, "GetProfile"},
+        {6, nullptr, "GetProfileDigest"}, // 3.0.0+
+        {50, &ACC_SU::IsUserRegistrationRequestPermitted, "IsUserRegistrationRequestPermitted"},
+        {51, &ACC_SU::TrySelectUserWithoutInteraction, "TrySelectUserWithoutInteraction"},
+        {60, &ACC_SU::ListOpenContextStoredUsers, "ListOpenContextStoredUsers"}, // 5.0.0 - 5.1.0
+        {99, nullptr, "DebugActivateOpenContextRetention"}, // 6.0.0+
+        {100, nullptr, "GetUserRegistrationNotifier"},
+        {101, nullptr, "GetUserStateChangeNotifier"},
+        {102, nullptr, "GetBaasAccountManagerForSystemService"},
+        {103, nullptr, "GetBaasUserAvailabilityChangeNotifier"},
+        {104, nullptr, "GetProfileUpdateNotifier"},
+        {105, nullptr, "CheckNetworkServiceAvailabilityAsync"}, // 4.0.0+
+        {106, nullptr, "GetProfileSyncNotifier"}, // 9.0.0+
+        {110, nullptr, "StoreSaveDataThumbnail"},
+        {111, nullptr, "ClearSaveDataThumbnail"},
+        {112, nullptr, "LoadSaveDataThumbnail"},
+        {113, nullptr, "GetSaveDataThumbnailExistence"}, // 5.0.0+
+        {120, nullptr, "ListOpenUsersInApplication"}, // 10.0.0+
+        {130, nullptr, "ActivateOpenContextRetention"}, // 6.0.0+
+        {140, &ACC_SU::ListQualifiedUsers, "ListQualifiedUsers"}, // 6.0.0+
+        {150, nullptr, "AuthenticateApplicationAsync"}, // 10.0.0+
+        {190, nullptr, "GetUserLastOpenedApplication"}, // 1.0.0 - 9.2.0
+        {191, nullptr, "ActivateOpenContextHolder"}, // 7.0.0+
+        {200, nullptr, "BeginUserRegistration"},
+        {201, nullptr, "CompleteUserRegistration"},
+        {202, nullptr, "CancelUserRegistration"},
+        {203, nullptr, "DeleteUser"},
+        {204, nullptr, "SetUserPosition"},
+        {205, &ACC_SU::GetProfileEditor, "GetProfileEditor"},
+        {206, nullptr, "CompleteUserRegistrationForcibly"},
+        {210, nullptr, "CreateFloatingRegistrationRequest"}, // 3.0.0+
+        {211, nullptr, "CreateProcedureToRegisterUserWithNintendoAccount"}, // 8.0.0+
+        {212, nullptr, "ResumeProcedureToRegisterUserWithNintendoAccount"}, // 8.0.0+
+        {230, nullptr, "AuthenticateServiceAsync"},
+        {250, nullptr, "GetBaasAccountAdministrator"},
+        {290, nullptr, "ProxyProcedureForGuestLoginWithNintendoAccount"},
+        {291, nullptr, "ProxyProcedureForFloatingRegistrationWithNintendoAccount"}, // 3.0.0+
+        {299, nullptr, "SuspendBackgroundDaemon"},
+        {997, nullptr, "DebugInvalidateTokenCacheForUser"}, // 3.0.0+
+        {998, nullptr, "DebugSetUserStateClose"},
+        {999, nullptr, "DebugSetUserStateOpen"},
+    };
+    // clang-format on
+
+    RegisterHandlers(functions);
+}
+
+ACC_SU::~ACC_SU() = default;
+
+} // namespace Service::Account

src/core/hle/service/acc/acc_su.h

@@ -0,0 +1,18 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "core/hle/service/acc/acc.h"
+
+namespace Service::Account {
+
+class ACC_SU final : public Module::Interface {
+public:
+    explicit ACC_SU(std::shared_ptr<Module> module, std::shared_ptr<ProfileManager> profile_manager,
+                    Core::System& system);
+    ~ACC_SU() override;
+};
+
+} // namespace Service::Account

src/core/hle/service/acc/acc_u0.cpp

@@ -0,0 +1,45 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "core/hle/service/acc/acc_u0.h"
+
+namespace Service::Account {
+
+ACC_U0::ACC_U0(std::shared_ptr<Module> module, std::shared_ptr<ProfileManager> profile_manager,
+               Core::System& system)
+    : Module::Interface(std::move(module), std::move(profile_manager), system, "acc:u0") {
+    // clang-format off
+    static const FunctionInfo functions[] = {
+        {0, &ACC_U0::GetUserCount, "GetUserCount"},
+        {1, &ACC_U0::GetUserExistence, "GetUserExistence"},
+        {2, &ACC_U0::ListAllUsers, "ListAllUsers"},
+        {3, &ACC_U0::ListOpenUsers, "ListOpenUsers"},
+        {4, &ACC_U0::GetLastOpenedUser, "GetLastOpenedUser"},
+        {5, &ACC_U0::GetProfile, "GetProfile"},
+        {6, nullptr, "GetProfileDigest"}, // 3.0.0+
+        {50, &ACC_U0::IsUserRegistrationRequestPermitted, "IsUserRegistrationRequestPermitted"},
+        {51, &ACC_U0::TrySelectUserWithoutInteraction, "TrySelectUserWithoutInteraction"},
+        {60, &ACC_U0::ListOpenContextStoredUsers, "ListOpenContextStoredUsers"}, // 5.0.0 - 5.1.0
+        {99, nullptr, "DebugActivateOpenContextRetention"}, // 6.0.0+
+        {100, &ACC_U0::InitializeApplicationInfo, "InitializeApplicationInfo"},
+        {101, &ACC_U0::GetBaasAccountManagerForApplication, "GetBaasAccountManagerForApplication"},
+        {102, nullptr, "AuthenticateApplicationAsync"},
+        {103, nullptr, "CheckNetworkServiceAvailabilityAsync"}, // 4.0.0+
+        {110, nullptr, "StoreSaveDataThumbnail"},
+        {111, nullptr, "ClearSaveDataThumbnail"},
+        {120, nullptr, "CreateGuestLoginRequest"},
+        {130, &ACC_U0::LoadOpenContext, "LoadOpenContext"}, // 5.0.0+
+        {131, &ACC_U0::ListOpenContextStoredUsers, "ListOpenContextStoredUsers"}, // 6.0.0+
+        {140, &ACC_U0::InitializeApplicationInfoRestricted, "InitializeApplicationInfoRestricted"}, // 6.0.0+
+        {141, &ACC_U0::ListQualifiedUsers, "ListQualifiedUsers"}, // 6.0.0+
+        {150, &ACC_U0::IsUserAccountSwitchLocked, "IsUserAccountSwitchLocked"}, // 6.0.0+
+    };
+    // clang-format on
+
+    RegisterHandlers(functions);
+}
+
+ACC_U0::~ACC_U0() = default;
+
+} // namespace Service::Account

src/core/hle/service/acc/acc_u0.h

@@ -0,0 +1,18 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "core/hle/service/acc/acc.h"
+
+namespace Service::Account {
+
+class ACC_U0 final : public Module::Interface {
+public:
+    explicit ACC_U0(std::shared_ptr<Module> module, std::shared_ptr<ProfileManager> profile_manager,
+                    Core::System& system);
+    ~ACC_U0() override;
+};
+
+} // namespace Service::Account

src/core/hle/service/acc/acc_u1.cpp

@@ -0,0 +1,53 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "core/hle/service/acc/acc_u1.h"
+
+namespace Service::Account {
+
+ACC_U1::ACC_U1(std::shared_ptr<Module> module, std::shared_ptr<ProfileManager> profile_manager,
+               Core::System& system)
+    : Module::Interface(std::move(module), std::move(profile_manager), system, "acc:u1") {
+    // clang-format off
+    static const FunctionInfo functions[] = {
+        {0, &ACC_U1::GetUserCount, "GetUserCount"},
+        {1, &ACC_U1::GetUserExistence, "GetUserExistence"},
+        {2, &ACC_U1::ListAllUsers, "ListAllUsers"},
+        {3, &ACC_U1::ListOpenUsers, "ListOpenUsers"},
+        {4, &ACC_U1::GetLastOpenedUser, "GetLastOpenedUser"},
+        {5, &ACC_U1::GetProfile, "GetProfile"},
+        {6, nullptr, "GetProfileDigest"}, // 3.0.0+
+        {50, &ACC_U1::IsUserRegistrationRequestPermitted, "IsUserRegistrationRequestPermitted"},
+        {51, &ACC_U1::TrySelectUserWithoutInteraction, "TrySelectUserWithoutInteraction"},
+        {60, &ACC_U1::ListOpenContextStoredUsers, "ListOpenContextStoredUsers"}, // 5.0.0 - 5.1.0
+        {99, nullptr, "DebugActivateOpenContextRetention"}, // 6.0.0+
+        {100, nullptr, "GetUserRegistrationNotifier"},
+        {101, nullptr, "GetUserStateChangeNotifier"},
+        {102, nullptr, "GetBaasAccountManagerForSystemService"},
+        {103, nullptr, "GetBaasUserAvailabilityChangeNotifier"},
+        {104, nullptr, "GetProfileUpdateNotifier"},
+        {105, nullptr, "CheckNetworkServiceAvailabilityAsync"}, // 4.0.0+
+        {106, nullptr, "GetProfileSyncNotifier"}, // 9.0.0+
+        {110, nullptr, "StoreSaveDataThumbnail"},
+        {111, nullptr, "ClearSaveDataThumbnail"},
+        {112, nullptr, "LoadSaveDataThumbnail"},
+        {113, nullptr, "GetSaveDataThumbnailExistence"}, // 5.0.0+
+        {120, nullptr, "ListOpenUsersInApplication"}, // 10.0.0+
+        {130, nullptr, "ActivateOpenContextRetention"}, // 6.0.0+
+        {140, &ACC_U1::ListQualifiedUsers, "ListQualifiedUsers"}, // 6.0.0+
+        {150, nullptr, "AuthenticateApplicationAsync"}, // 10.0.0+
+        {190, nullptr, "GetUserLastOpenedApplication"}, // 1.0.0 - 9.2.0
+        {191, nullptr, "ActivateOpenContextHolder"}, // 7.0.0+
+        {997, nullptr, "DebugInvalidateTokenCacheForUser"}, // 3.0.0+
+        {998, nullptr, "DebugSetUserStateClose"},
+        {999, nullptr, "DebugSetUserStateOpen"},
+    };
+    // clang-format on
+
+    RegisterHandlers(functions);
+}
+
+ACC_U1::~ACC_U1() = default;
+
+} // namespace Service::Account

src/core/hle/service/acc/acc_u1.h

@@ -0,0 +1,18 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "core/hle/service/acc/acc.h"
+
+namespace Service::Account {
+
+class ACC_U1 final : public Module::Interface {
+public:
+    explicit ACC_U1(std::shared_ptr<Module> module, std::shared_ptr<ProfileManager> profile_manager,
+                    Core::System& system);
+    ~ACC_U1() override;
+};
+
+} // namespace Service::Account

src/core/hle/service/acc/errors.h

@@ -0,0 +1,14 @@
+// Copyright 2019 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "core/hle/result.h"
+
+namespace Service::Account {
+
+constexpr ResultCode ERR_ACCOUNTINFO_BAD_APPLICATION{ErrorModule::Account, 22};
+constexpr ResultCode ERR_ACCOUNTINFO_ALREADY_INITIALIZED{ErrorModule::Account, 41};
+
+} // namespace Service::Account

src/core/hle/service/acc/profile_manager.cpp

@@ -0,0 +1,396 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include <cstring>
+#include <random>
+
+#include <fmt/format.h>
+
+#include "common/file_util.h"
+#include "core/hle/service/acc/profile_manager.h"
+#include "core/settings.h"
+
+namespace Service::Account {
+
+namespace FS = Common::FS;
+using Common::UUID;
+
+struct UserRaw {
+    UUID uuid{Common::INVALID_UUID};
+    UUID uuid2{Common::INVALID_UUID};
+    u64 timestamp{};
+    ProfileUsername username{};
+    ProfileData extra_data{};
+};
+static_assert(sizeof(UserRaw) == 0xC8, "UserRaw has incorrect size.");
+
+struct ProfileDataRaw {
+    INSERT_PADDING_BYTES(0x10);
+    std::array<UserRaw, MAX_USERS> users{};
+};
+static_assert(sizeof(ProfileDataRaw) == 0x650, "ProfileDataRaw has incorrect size.");
+
+// TODO(ogniK): Get actual error codes
+constexpr ResultCode ERROR_TOO_MANY_USERS(ErrorModule::Account, u32(-1));
+constexpr ResultCode ERROR_USER_ALREADY_EXISTS(ErrorModule::Account, u32(-2));
+constexpr ResultCode ERROR_ARGUMENT_IS_NULL(ErrorModule::Account, 20);
+
+constexpr char ACC_SAVE_AVATORS_BASE_PATH[] = "/system/save/8000000000000010/su/avators/";
+
+ProfileManager::ProfileManager() {
+    ParseUserSaveFile();
+
+    if (user_count == 0)
+        CreateNewUser(UUID::Generate(), "yuzu");
+
+    auto current = std::clamp<int>(Settings::values.current_user, 0, MAX_USERS - 1);
+    if (UserExistsIndex(current))
+        current = 0;
+
+    OpenUser(*GetUser(current));
+}
+
+ProfileManager::~ProfileManager() {
+    WriteUserSaveFile();
+}
+
+/// After a users creation it needs to be "registered" to the system. AddToProfiles handles the
+/// internal management of the users profiles
+std::optional<std::size_t> ProfileManager::AddToProfiles(const ProfileInfo& profile) {
+    if (user_count >= MAX_USERS) {
+        return std::nullopt;
+    }
+    profiles[user_count] = profile;
+    return user_count++;
+}
+
+/// Deletes a specific profile based on it's profile index
+bool ProfileManager::RemoveProfileAtIndex(std::size_t index) {
+    if (index >= MAX_USERS || index >= user_count) {
+        return false;
+    }
+    if (index < user_count - 1) {
+        std::rotate(profiles.begin() + index, profiles.begin() + index + 1, profiles.end());
+    }
+    profiles.back() = {};
+    user_count--;
+    return true;
+}
+
+/// Helper function to register a user to the system
+ResultCode ProfileManager::AddUser(const ProfileInfo& user) {
+    if (!AddToProfiles(user)) {
+        return ERROR_TOO_MANY_USERS;
+    }
+    return RESULT_SUCCESS;
+}
+
+/// Create a new user on the system. If the uuid of the user already exists, the user is not
+/// created.
+ResultCode ProfileManager::CreateNewUser(UUID uuid, const ProfileUsername& username) {
+    if (user_count == MAX_USERS) {
+        return ERROR_TOO_MANY_USERS;
+    }
+    if (!uuid) {
+        return ERROR_ARGUMENT_IS_NULL;
+    }
+    if (username[0] == 0x0) {
+        return ERROR_ARGUMENT_IS_NULL;
+    }
+    if (std::any_of(profiles.begin(), profiles.end(),
+                    [&uuid](const ProfileInfo& profile) { return uuid == profile.user_uuid; })) {
+        return ERROR_USER_ALREADY_EXISTS;
+    }
+
+    return AddUser({
+        .user_uuid = uuid,
+        .username = username,
+        .creation_time = 0,
+        .data = {},
+        .is_open = false,
+    });
+}
+
+/// Creates a new user on the system. This function allows a much simpler method of registration
+/// specifically by allowing an std::string for the username. This is required specifically since
+/// we're loading a string straight from the config
+ResultCode ProfileManager::CreateNewUser(UUID uuid, const std::string& username) {
+    ProfileUsername username_output{};
+
+    if (username.size() > username_output.size()) {
+        std::copy_n(username.begin(), username_output.size(), username_output.begin());
+    } else {
+        std::copy(username.begin(), username.end(), username_output.begin());
+    }
+    return CreateNewUser(uuid, username_output);
+}
+
+std::optional<UUID> ProfileManager::GetUser(std::size_t index) const {
+    if (index >= MAX_USERS) {
+        return std::nullopt;
+    }
+
+    return profiles[index].user_uuid;
+}
+
+/// Returns a users profile index based on their user id.
+std::optional<std::size_t> ProfileManager::GetUserIndex(const UUID& uuid) const {
+    if (!uuid) {
+        return std::nullopt;
+    }
+
+    const auto iter = std::find_if(profiles.begin(), profiles.end(),
+                                   [&uuid](const ProfileInfo& p) { return p.user_uuid == uuid; });
+    if (iter == profiles.end()) {
+        return std::nullopt;
+    }
+
+    return static_cast<std::size_t>(std::distance(profiles.begin(), iter));
+}
+
+/// Returns a users profile index based on their profile
+std::optional<std::size_t> ProfileManager::GetUserIndex(const ProfileInfo& user) const {
+    return GetUserIndex(user.user_uuid);
+}
+
+/// Returns the data structure used by the switch when GetProfileBase is called on acc:*
+bool ProfileManager::GetProfileBase(std::optional<std::size_t> index, ProfileBase& profile) const {
+    if (!index || index >= MAX_USERS) {
+        return false;
+    }
+    const auto& prof_info = profiles[*index];
+    profile.user_uuid = prof_info.user_uuid;
+    profile.username = prof_info.username;
+    profile.timestamp = prof_info.creation_time;
+    return true;
+}
+
+/// Returns the data structure used by the switch when GetProfileBase is called on acc:*
+bool ProfileManager::GetProfileBase(UUID uuid, ProfileBase& profile) const {
+    const auto idx = GetUserIndex(uuid);
+    return GetProfileBase(idx, profile);
+}
+
+/// Returns the data structure used by the switch when GetProfileBase is called on acc:*
+bool ProfileManager::GetProfileBase(const ProfileInfo& user, ProfileBase& profile) const {
+    return GetProfileBase(user.user_uuid, profile);
+}
+
+/// Returns the current user count on the system. We keep a variable which tracks the count so we
+/// don't have to loop the internal profile array every call.
+
+std::size_t ProfileManager::GetUserCount() const {
+    return user_count;
+}
+
+/// Lists the current "opened" users on the system. Users are typically not open until they sign
+/// into something or pick a profile. As of right now users should all be open until qlaunch is
+/// booting
+
+std::size_t ProfileManager::GetOpenUserCount() const {
+    return std::count_if(profiles.begin(), profiles.end(),
+                         [](const ProfileInfo& p) { return p.is_open; });
+}
+
+/// Checks if a user id exists in our profile manager
+bool ProfileManager::UserExists(UUID uuid) const {
+    return GetUserIndex(uuid).has_value();
+}
+
+bool ProfileManager::UserExistsIndex(std::size_t index) const {
+    if (index >= MAX_USERS)
+        return false;
+    return profiles[index].user_uuid.uuid != Common::INVALID_UUID;
+}
+
+/// Opens a specific user
+void ProfileManager::OpenUser(UUID uuid) {
+    const auto idx = GetUserIndex(uuid);
+    if (!idx) {
+        return;
+    }
+
+    profiles[*idx].is_open = true;
+    last_opened_user = uuid;
+}
+
+/// Closes a specific user
+void ProfileManager::CloseUser(UUID uuid) {
+    const auto idx = GetUserIndex(uuid);
+    if (!idx) {
+        return;
+    }
+
+    profiles[*idx].is_open = false;
+}
+
+/// Gets all valid user ids on the system
+UserIDArray ProfileManager::GetAllUsers() const {
+    UserIDArray output;
+    std::transform(profiles.begin(), profiles.end(), output.begin(),
+                   [](const ProfileInfo& p) { return p.user_uuid; });
+    return output;
+}
+
+/// Get all the open users on the system and zero out the rest of the data. This is specifically
+/// needed for GetOpenUsers and we need to ensure the rest of the output buffer is zero'd out
+UserIDArray ProfileManager::GetOpenUsers() const {
+    UserIDArray output;
+    std::transform(profiles.begin(), profiles.end(), output.begin(), [](const ProfileInfo& p) {
+        if (p.is_open)
+            return p.user_uuid;
+        return UUID{Common::INVALID_UUID};
+    });
+    std::stable_partition(output.begin(), output.end(), [](const UUID& uuid) { return uuid; });
+    return output;
+}
+
+/// Returns the last user which was opened
+UUID ProfileManager::GetLastOpenedUser() const {
+    return last_opened_user;
+}
+
+/// Return the users profile base and the unknown arbitary data.
+bool ProfileManager::GetProfileBaseAndData(std::optional<std::size_t> index, ProfileBase& profile,
+                                           ProfileData& data) const {
+    if (GetProfileBase(index, profile)) {
+        data = profiles[*index].data;
+        return true;
+    }
+    return false;
+}
+
+/// Return the users profile base and the unknown arbitary data.
+bool ProfileManager::GetProfileBaseAndData(UUID uuid, ProfileBase& profile,
+                                           ProfileData& data) const {
+    const auto idx = GetUserIndex(uuid);
+    return GetProfileBaseAndData(idx, profile, data);
+}
+
+/// Return the users profile base and the unknown arbitary data.
+bool ProfileManager::GetProfileBaseAndData(const ProfileInfo& user, ProfileBase& profile,
+                                           ProfileData& data) const {
+    return GetProfileBaseAndData(user.user_uuid, profile, data);
+}
+
+/// Returns if the system is allowing user registrations or not
+bool ProfileManager::CanSystemRegisterUser() const {
+    return false; // TODO(ogniK): Games shouldn't have
+                  // access to user registration, when we
+    // emulate qlaunch. Update this to dynamically change.
+}
+
+bool ProfileManager::RemoveUser(UUID uuid) {
+    const auto index = GetUserIndex(uuid);
+    if (!index) {
+        return false;
+    }
+
+    profiles[*index] = ProfileInfo{};
+    std::stable_partition(profiles.begin(), profiles.end(),
+                          [](const ProfileInfo& profile) { return profile.user_uuid; });
+    return true;
+}
+
+bool ProfileManager::SetProfileBase(UUID uuid, const ProfileBase& profile_new) {
+    const auto index = GetUserIndex(uuid);
+    if (!index || profile_new.user_uuid == UUID(Common::INVALID_UUID)) {
+        return false;
+    }
+
+    auto& profile = profiles[*index];
+    profile.user_uuid = profile_new.user_uuid;
+    profile.username = profile_new.username;
+    profile.creation_time = profile_new.timestamp;
+
+    return true;
+}
+
+bool ProfileManager::SetProfileBaseAndData(Common::UUID uuid, const ProfileBase& profile_new,
+                                           const ProfileData& data_new) {
+    const auto index = GetUserIndex(uuid);
+    if (index.has_value() && SetProfileBase(uuid, profile_new)) {
+        profiles[*index].data = data_new;
+        return true;
+    }
+
+    return false;
+}
+
+void ProfileManager::ParseUserSaveFile() {
+    const FS::IOFile save(
+        FS::GetUserPath(FS::UserPath::NANDDir) + ACC_SAVE_AVATORS_BASE_PATH + "profiles.dat", "rb");
+
+    if (!save.IsOpen()) {
+        LOG_WARNING(Service_ACC, "Failed to load profile data from save data... Generating new "
+                                 "user 'yuzu' with random UUID.");
+        return;
+    }
+
+    ProfileDataRaw data;
+    if (save.ReadBytes(&data, sizeof(ProfileDataRaw)) != sizeof(ProfileDataRaw)) {
+        LOG_WARNING(Service_ACC, "profiles.dat is smaller than expected... Generating new user "
+                                 "'yuzu' with random UUID.");
+        return;
+    }
+
+    for (const auto& user : data.users) {
+        if (user.uuid == UUID(Common::INVALID_UUID)) {
+            continue;
+        }
+
+        AddUser({
+            .user_uuid = user.uuid,
+            .username = user.username,
+            .creation_time = user.timestamp,
+            .data = user.extra_data,
+            .is_open = false,
+        });
+    }
+
+    std::stable_partition(profiles.begin(), profiles.end(),
+                          [](const ProfileInfo& profile) { return profile.user_uuid; });
+}
+
+void ProfileManager::WriteUserSaveFile() {
+    ProfileDataRaw raw{};
+
+    for (std::size_t i = 0; i < MAX_USERS; ++i) {
+        raw.users[i] = {
+            .uuid = profiles[i].user_uuid,
+            .uuid2 = profiles[i].user_uuid,
+            .timestamp = profiles[i].creation_time,
+            .username = profiles[i].username,
+            .extra_data = profiles[i].data,
+        };
+    }
+
+    const auto raw_path = FS::GetUserPath(FS::UserPath::NANDDir) + "/system/save/8000000000000010";
+    if (FS::Exists(raw_path) && !FS::IsDirectory(raw_path)) {
+        FS::Delete(raw_path);
+    }
+
+    const auto path =
+        FS::GetUserPath(FS::UserPath::NANDDir) + ACC_SAVE_AVATORS_BASE_PATH + "profiles.dat";
+
+    if (!FS::CreateFullPath(path)) {
+        LOG_WARNING(Service_ACC, "Failed to create full path of profiles.dat. Create the directory "
+                                 "nand/system/save/8000000000000010/su/avators to mitigate this "
+                                 "issue.");
+        return;
+    }
+
+    FS::IOFile save(path, "wb");
+
+    if (!save.IsOpen()) {
+        LOG_WARNING(Service_ACC, "Failed to write save data to file... No changes to user data "
+                                 "made in current session will be saved.");
+        return;
+    }
+
+    save.Resize(sizeof(ProfileDataRaw));
+    save.WriteBytes(&raw, sizeof(ProfileDataRaw));
+}
+
+}; // namespace Service::Account

src/core/hle/service/acc/profile_manager.h

@@ -0,0 +1,109 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <array>
+#include <optional>
+
+#include "common/common_types.h"
+#include "common/swap.h"
+#include "common/uuid.h"
+#include "core/hle/result.h"
+
+namespace Service::Account {
+
+constexpr std::size_t MAX_USERS{8};
+constexpr std::size_t profile_username_size{32};
+
+using ProfileUsername = std::array<u8, profile_username_size>;
+using UserIDArray = std::array<Common::UUID, MAX_USERS>;
+
+/// Contains extra data related to a user.
+/// TODO: RE this structure
+struct ProfileData {
+    INSERT_PADDING_WORDS(1);
+    u32 icon_id{};
+    u8 bg_color_id{};
+    INSERT_PADDING_BYTES(0x7);
+    INSERT_PADDING_BYTES(0x10);
+    INSERT_PADDING_BYTES(0x60);
+};
+static_assert(sizeof(ProfileData) == 0x80, "ProfileData structure has incorrect size");
+
+/// This holds general information about a users profile. This is where we store all the information
+/// based on a specific user
+struct ProfileInfo {
+    Common::UUID user_uuid{Common::INVALID_UUID};
+    ProfileUsername username{};
+    u64 creation_time{};
+    ProfileData data{}; // TODO(ognik): Work out what this is
+    bool is_open{};
+};
+
+struct ProfileBase {
+    Common::UUID user_uuid{Common::INVALID_UUID};
+    u64_le timestamp{};
+    ProfileUsername username{};
+
+    // Zero out all the fields to make the profile slot considered "Empty"
+    void Invalidate() {
+        user_uuid.Invalidate();
+        timestamp = 0;
+        username.fill(0);
+    }
+};
+static_assert(sizeof(ProfileBase) == 0x38, "ProfileBase is an invalid size");
+
+/// The profile manager is used for handling multiple user profiles at once. It keeps track of open
+/// users, all the accounts registered on the "system" as well as fetching individual "ProfileInfo"
+/// objects
+class ProfileManager {
+public:
+    ProfileManager();
+    ~ProfileManager();
+
+    ResultCode AddUser(const ProfileInfo& user);
+    ResultCode CreateNewUser(Common::UUID uuid, const ProfileUsername& username);
+    ResultCode CreateNewUser(Common::UUID uuid, const std::string& username);
+    std::optional<Common::UUID> GetUser(std::size_t index) const;
+    std::optional<std::size_t> GetUserIndex(const Common::UUID& uuid) const;
+    std::optional<std::size_t> GetUserIndex(const ProfileInfo& user) const;
+    bool GetProfileBase(std::optional<std::size_t> index, ProfileBase& profile) const;
+    bool GetProfileBase(Common::UUID uuid, ProfileBase& profile) const;
+    bool GetProfileBase(const ProfileInfo& user, ProfileBase& profile) const;
+    bool GetProfileBaseAndData(std::optional<std::size_t> index, ProfileBase& profile,
+                               ProfileData& data) const;
+    bool GetProfileBaseAndData(Common::UUID uuid, ProfileBase& profile, ProfileData& data) const;
+    bool GetProfileBaseAndData(const ProfileInfo& user, ProfileBase& profile,
+                               ProfileData& data) const;
+    std::size_t GetUserCount() const;
+    std::size_t GetOpenUserCount() const;
+    bool UserExists(Common::UUID uuid) const;
+    bool UserExistsIndex(std::size_t index) const;
+    void OpenUser(Common::UUID uuid);
+    void CloseUser(Common::UUID uuid);
+    UserIDArray GetOpenUsers() const;
+    UserIDArray GetAllUsers() const;
+    Common::UUID GetLastOpenedUser() const;
+
+    bool CanSystemRegisterUser() const;
+
+    bool RemoveUser(Common::UUID uuid);
+    bool SetProfileBase(Common::UUID uuid, const ProfileBase& profile_new);
+    bool SetProfileBaseAndData(Common::UUID uuid, const ProfileBase& profile_new,
+                               const ProfileData& data_new);
+
+private:
+    void ParseUserSaveFile();
+    void WriteUserSaveFile();
+    std::optional<std::size_t> AddToProfiles(const ProfileInfo& profile);
+    bool RemoveProfileAtIndex(std::size_t index);
+
+    std::array<ProfileInfo, MAX_USERS> profiles{};
+    std::size_t user_count{};
+    Common::UUID last_opened_user{Common::INVALID_UUID};
+};
+
+}; // namespace Service::Account