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92 lines
2.9 KiB
C++
92 lines
2.9 KiB
C++
// Copyright 2014 Citra Emulator Project
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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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#include <random>
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#include "common/common_types.h"
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#include "core/hle/service/ssl_c.h"
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////////////////////////////////////////////////////////////////////////////////////////////////////
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// Namespace SSL_C
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namespace SSL_C {
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// TODO: Implement a proper CSPRNG in the future when actual security is needed
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static std::mt19937 rand_gen;
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static void Initialize(Service::Interface* self) {
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u32* cmd_buff = Kernel::GetCommandBuffer();
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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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cmd_buff[1] = RESULT_SUCCESS.raw;
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}
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static void GenerateRandomData(Service::Interface* self) {
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u32* cmd_buff = Kernel::GetCommandBuffer();
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u32 size = cmd_buff[1];
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VAddr address = cmd_buff[3];
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// Fill the output buffer with random data.
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u32 data = 0;
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u32 i = 0;
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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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Memory::Write32(address + i, data);
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i += 4;
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} else if (size == 2) {
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Memory::Write16(address + i, static_cast<u16>(data & 0xffff));
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i += 2;
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} else {
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Memory::Write8(address + i, static_cast<u8>(data & 0xff));
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i++;
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}
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}
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// Stub, return success
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cmd_buff[1] = RESULT_SUCCESS.raw;
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}
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const Interface::FunctionInfo FunctionTable[] = {
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{0x00010002, Initialize, "Initialize"},
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{0x000200C2, nullptr, "CreateContext"},
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{0x00030000, nullptr, "CreateRootCertChain"},
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{0x00040040, nullptr, "DestroyRootCertChain"},
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{0x00050082, nullptr, "AddTrustedRootCA"},
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{0x00060080, nullptr, "RootCertChainAddDefaultCert"},
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{0x00070080, nullptr, "RootCertChainRemoveCert"},
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{0x000E0040, nullptr, "OpenDefaultClientCertContext"},
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{0x000F0040, nullptr, "CloseClientCertContext"},
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{0x00110042, GenerateRandomData, "GenerateRandomData"},
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{0x00120042, nullptr, "InitializeConnectionSession"},
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{0x00130040, nullptr, "StartConnection"},
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{0x00140040, nullptr, "StartConnectionGetOut"},
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{0x00150082, nullptr, "Read"},
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{0x00170082, nullptr, "Write"},
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{0x00180080, nullptr, "ContextSetRootCertChain"},
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{0x00190080, nullptr, "ContextSetClientCert"},
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{0x001B0080, nullptr, "ContextClearOpt"},
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{0x001E0040, nullptr, "DestroyContext"},
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{0x001F0082, nullptr, "ContextInitSharedmem"},
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};
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////////////////////////////////////////////////////////////////////////////////////////////////////
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// Interface class
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Interface::Interface() {
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Register(FunctionTable);
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}
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} // namespace
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