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Implement PS:GetRandomBytes and use openssl for random bytes (#7164)
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e9936e01c2
commit
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@ -9,6 +9,7 @@
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#include "core/core.h"
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#include "core/core.h"
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#include "core/hle/ipc_helpers.h"
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#include "core/hle/ipc_helpers.h"
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#include "core/hle/service/ps/ps_ps.h"
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#include "core/hle/service/ps/ps_ps.h"
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#include "core/hle/service/ssl/ssl_c.h"
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#include "core/hw/aes/arithmetic128.h"
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#include "core/hw/aes/arithmetic128.h"
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#include "core/hw/aes/key.h"
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#include "core/hw/aes/key.h"
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@ -146,6 +147,20 @@ void PS_PS::EncryptDecryptAes(Kernel::HLERequestContext& ctx) {
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rb.PushMappedBuffer(destination);
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rb.PushMappedBuffer(destination);
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}
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}
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void PS_PS::GenerateRandomBytes(Kernel::HLERequestContext& ctx) {
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IPC::RequestParser rp(ctx);
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const u32 size = rp.Pop<u32>();
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auto buffer = rp.PopMappedBuffer();
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std::vector<u8> out_data(size);
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SSL::GenerateRandomData(out_data);
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buffer.Write(out_data.data(), 0, size);
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IPC::RequestBuilder rb = rp.MakeBuilder(1, 2);
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rb.Push(RESULT_SUCCESS);
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rb.PushMappedBuffer(buffer);
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}
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PS_PS::PS_PS() : ServiceFramework("ps:ps", DefaultMaxSessions) {
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PS_PS::PS_PS() : ServiceFramework("ps:ps", DefaultMaxSessions) {
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static const FunctionInfo functions[] = {
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static const FunctionInfo functions[] = {
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// clang-format off
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// clang-format off
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@ -160,7 +175,7 @@ PS_PS::PS_PS() : ServiceFramework("ps:ps", DefaultMaxSessions) {
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{0x000A, nullptr, "GetLocalFriendCodeSeed"},
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{0x000A, nullptr, "GetLocalFriendCodeSeed"},
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{0x000B, nullptr, "GetDeviceId"},
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{0x000B, nullptr, "GetDeviceId"},
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{0x000C, nullptr, "SeedRNG"},
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{0x000C, nullptr, "SeedRNG"},
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{0x000D, nullptr, "GenerateRandomBytes"},
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{0x000D, &PS_PS::GenerateRandomBytes, "GenerateRandomBytes"},
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{0x000E, nullptr, "InterfaceForPXI_0x04010084"},
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{0x000E, nullptr, "InterfaceForPXI_0x04010084"},
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{0x000F, nullptr, "InterfaceForPXI_0x04020082"},
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{0x000F, nullptr, "InterfaceForPXI_0x04020082"},
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{0x0010, nullptr, "InterfaceForPXI_0x04030044"},
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{0x0010, nullptr, "InterfaceForPXI_0x04030044"},
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@ -2,6 +2,7 @@
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// Licensed under GPLv2 or any later version
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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// Refer to the license.txt file included.
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#include <openssl/rand.h>
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#include "common/archives.h"
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#include "common/archives.h"
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#include "common/common_types.h"
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#include "common/common_types.h"
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#include "core/core.h"
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#include "core/core.h"
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@ -16,10 +17,6 @@ void SSL_C::Initialize(Kernel::HLERequestContext& ctx) {
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IPC::RequestParser rp(ctx);
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IPC::RequestParser rp(ctx);
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rp.PopPID();
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rp.PopPID();
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// Seed random number generator when the SSL service is initialized
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std::random_device rand_device;
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rand_gen.seed(rand_device());
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// Stub, return success
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// Stub, return success
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IPC::RequestBuilder rb = rp.MakeBuilder(1, 0);
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IPC::RequestBuilder rb = rp.MakeBuilder(1, 0);
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rb.Push(RESULT_SUCCESS);
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rb.Push(RESULT_SUCCESS);
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@ -27,33 +24,13 @@ void SSL_C::Initialize(Kernel::HLERequestContext& ctx) {
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void SSL_C::GenerateRandomData(Kernel::HLERequestContext& ctx) {
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void SSL_C::GenerateRandomData(Kernel::HLERequestContext& ctx) {
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IPC::RequestParser rp(ctx);
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IPC::RequestParser rp(ctx);
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u32 size = rp.Pop<u32>();
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const u32 size = rp.Pop<u32>();
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auto buffer = rp.PopMappedBuffer();
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auto buffer = rp.PopMappedBuffer();
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// Fill the output buffer with random data.
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std::vector<u8> out_data(size);
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u32 data = 0;
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SSL::GenerateRandomData(out_data);
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u32 i = 0;
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buffer.Write(out_data.data(), 0, size);
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while (i < size) {
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if ((i % 4) == 0) {
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// The random number generator returns 4 bytes worth of data, so generate new random
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// data when i == 0 and when i is divisible by 4
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data = rand_gen();
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}
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if (size > 4) {
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// Use up the entire 4 bytes of the random data for as long as possible
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buffer.Write(&data, i, 4);
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i += 4;
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} else if (size == 2) {
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buffer.Write(&data, i, 2);
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i += 2;
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} else {
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buffer.Write(&data, i, 1);
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i++;
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}
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}
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// Stub, return success
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IPC::RequestBuilder rb = rp.MakeBuilder(1, 2);
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IPC::RequestBuilder rb = rp.MakeBuilder(1, 2);
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rb.Push(RESULT_SUCCESS);
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rb.Push(RESULT_SUCCESS);
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rb.PushMappedBuffer(buffer);
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rb.PushMappedBuffer(buffer);
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@ -96,4 +73,9 @@ void InstallInterfaces(Core::System& system) {
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std::make_shared<SSL_C>()->InstallAsService(service_manager);
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std::make_shared<SSL_C>()->InstallAsService(service_manager);
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}
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}
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void GenerateRandomData(std::vector<u8>& out) {
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// Fill the output buffer with random data.
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RAND_bytes(out.data(), static_cast<int>(out.size()));
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}
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} // namespace Service::SSL
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} // namespace Service::SSL
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@ -21,14 +21,13 @@ private:
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void Initialize(Kernel::HLERequestContext& ctx);
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void Initialize(Kernel::HLERequestContext& ctx);
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void GenerateRandomData(Kernel::HLERequestContext& ctx);
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void GenerateRandomData(Kernel::HLERequestContext& ctx);
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// TODO: Implement a proper CSPRNG in the future when actual security is needed
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std::mt19937 rand_gen;
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SERVICE_SERIALIZATION_SIMPLE
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SERVICE_SERIALIZATION_SIMPLE
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};
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};
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void InstallInterfaces(Core::System& system);
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void InstallInterfaces(Core::System& system);
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void GenerateRandomData(std::vector<u8>& out);
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} // namespace Service::SSL
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} // namespace Service::SSL
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BOOST_CLASS_EXPORT_KEY(Service::SSL::SSL_C)
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BOOST_CLASS_EXPORT_KEY(Service::SSL::SSL_C)
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