service/ps: Implement PS:EncryptDecryptAES
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zhupengfei
parent
14730ed560
commit
b34847d59e
6 changed files with 145 additions and 2 deletions
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@ -196,6 +196,7 @@ void DebuggerBackend::Write(const Entry& entry) {
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SUB(Service, SOC) \
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SUB(Service, IR) \
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SUB(Service, Y2R) \
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SUB(Service, PS) \
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CLS(HW) \
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SUB(HW, Memory) \
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SUB(HW, LCD) \
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@ -82,6 +82,7 @@ enum class Class : ClassType {
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Service_SOC, ///< The SOC (Socket) service
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Service_IR, ///< The IR service
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Service_Y2R, ///< The Y2R (YUV to RGB conversion) service
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Service_PS, ///< The PS (Process) service
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HW, ///< Low-level hardware emulation
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HW_Memory, ///< Memory-map and address translation
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HW_LCD, ///< LCD register emulation
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@ -2,18 +2,144 @@
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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 <cryptopp/aes.h>
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#include <cryptopp/modes.h>
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#include "common/logging/log.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/service/ps/ps_ps.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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namespace Service::PS {
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enum class AlgorithmType : u8 {
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CBC_Encrypt,
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CBC_Decrypt,
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CTR_Encrypt,
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CTR_Decrypt,
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CCM_Encrypt,
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CCM_Decrypt,
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};
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constexpr std::array<u8, 10> KeyTypes{{
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0x0D,
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0x2D,
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0x31,
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0x38,
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0x32,
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0x39,
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0x2E,
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0, /* invalid */
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0x36,
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0x39,
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}};
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void PS_PS::EncryptDecryptAes(Kernel::HLERequestContext& ctx) {
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IPC::RequestParser rp(ctx, 0x4, 8, 4);
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u32 src_size = rp.Pop<u32>();
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u32 dest_size = rp.Pop<u32>();
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using CryptoPP::AES;
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std::array<u8, AES::BLOCKSIZE> iv;
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rp.PopRaw(iv);
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AlgorithmType algorithm = rp.PopEnum<AlgorithmType>();
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u8 key_type = rp.Pop<u8>();
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auto source = rp.PopMappedBuffer();
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auto destination = rp.PopMappedBuffer();
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LOG_DEBUG(Service_PS, "called algorithm={} key_type={}", static_cast<u8>(algorithm), key_type);
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// TODO(zhaowenlan1779): Tests on a real 3DS shows that no error is returned in this case
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// and encrypted data is actually returned, but the key used is unknown.
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ASSERT_MSG(key_type != 7 && key_type < 10, "Key type is invalid");
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if (!HW::AES::IsNormalKeyAvailable(KeyTypes[key_type])) {
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LOG_ERROR(Service_PS,
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"Key 0x{:2X} is not available, encryption/decryption will not be correct",
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KeyTypes[key_type]);
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}
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HW::AES::AESKey key = HW::AES::GetNormalKey(KeyTypes[key_type]);
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if (algorithm == AlgorithmType::CCM_Encrypt || algorithm == AlgorithmType::CCM_Decrypt) {
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// AES-CCM is not supported with this function
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IPC::RequestBuilder rb = rp.MakeBuilder(1, 0);
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rb.Push(ResultCode(ErrorDescription::InvalidSection, ErrorModule::PS,
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ErrorSummary::WrongArgument, ErrorLevel::Status));
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return;
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}
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if (algorithm == AlgorithmType::CBC_Encrypt || algorithm == AlgorithmType::CBC_Decrypt) {
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src_size &= 0xFFFFFFF0; // Clear the lowest 4 bits of the size (make it a multiple of 16)
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ASSERT(src_size > 0); // Real 3DS calls svcBreak in this case
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}
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std::vector<u8> src_buffer(src_size);
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source.Read(src_buffer.data(), 0, src_buffer.size());
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std::vector<u8> dst_buffer(src_buffer.size());
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switch (algorithm) {
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case AlgorithmType::CTR_Encrypt: {
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CryptoPP::CTR_Mode<AES>::Encryption aes;
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aes.SetKeyWithIV(key.data(), AES::BLOCKSIZE, iv.data());
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aes.ProcessData(dst_buffer.data(), src_buffer.data(), src_buffer.size());
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break;
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}
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case AlgorithmType::CTR_Decrypt: {
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CryptoPP::CTR_Mode<AES>::Decryption aes;
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aes.SetKeyWithIV(key.data(), AES::BLOCKSIZE, iv.data());
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aes.ProcessData(dst_buffer.data(), src_buffer.data(), src_buffer.size());
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break;
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}
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case AlgorithmType::CBC_Encrypt: {
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CryptoPP::CBC_Mode<AES>::Encryption aes;
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aes.SetKeyWithIV(key.data(), AES::BLOCKSIZE, iv.data());
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aes.ProcessData(dst_buffer.data(), src_buffer.data(), src_buffer.size());
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break;
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}
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case AlgorithmType::CBC_Decrypt: {
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CryptoPP::CBC_Mode<AES>::Decryption aes;
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aes.SetKeyWithIV(key.data(), AES::BLOCKSIZE, iv.data());
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aes.ProcessData(dst_buffer.data(), src_buffer.data(), src_buffer.size());
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break;
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}
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default:
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UNREACHABLE();
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}
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destination.Write(dst_buffer.data(), 0, dst_buffer.size());
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// We will need to calculate the resulting IV/CTR ourselves as CrytoPP does not
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// provide an easy way to get them
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std::array<u8, AES::BLOCKSIZE> new_iv;
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if (algorithm == AlgorithmType::CTR_Encrypt || algorithm == AlgorithmType::CTR_Decrypt) {
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new_iv = HW::AES::Add128(iv, src_size / 16);
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} else if (algorithm == AlgorithmType::CBC_Encrypt) { // For AES-CBC, The new IV is the last
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// block of ciphertext
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std::copy_n(dst_buffer.end() - new_iv.size(), new_iv.size(), new_iv.begin());
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} else {
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std::copy_n(src_buffer.end() - new_iv.size(), new_iv.size(), new_iv.begin());
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}
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IPC::RequestBuilder rb = rp.MakeBuilder(5, 4);
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rb.Push(RESULT_SUCCESS);
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rb.PushRaw(new_iv);
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rb.PushMappedBuffer(source);
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rb.PushMappedBuffer(destination);
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}
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PS_PS::PS_PS() : ServiceFramework("ps:ps", DefaultMaxSessions) {
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static const FunctionInfo functions[] = {
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// clang-format off
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{0x00010244, nullptr, "SignRsaSha256"},
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{0x00020244, nullptr, "VerifyRsaSha256"},
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{0x00040204, nullptr, "EncryptDecryptAes"},
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{0x00040204, &PS_PS::EncryptDecryptAes, "EncryptDecryptAes"},
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{0x00050284, nullptr, "EncryptSignDecryptVerifyAesCcm"},
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{0x00060040, nullptr, "GetRomId"},
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{0x00070040, nullptr, "GetRomId2"},
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@ -98,6 +98,7 @@ const std::array<ServiceModuleInfo, 40> service_module_map{
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{"HTTP", 0x00040130'00002902, HTTP::InstallInterfaces},
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{"SOC", 0x00040130'00002E02, SOC::InstallInterfaces},
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{"SSL", 0x00040130'00002F02, SSL::InstallInterfaces},
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{"PS", 0x00040130'00003102, PS::InstallInterfaces},
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// no HLE implementation
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{"CDC", 0x00040130'00001802, nullptr},
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{"GPIO", 0x00040130'00001B02, nullptr},
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@ -105,7 +106,6 @@ const std::array<ServiceModuleInfo, 40> service_module_map{
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{"MCU", 0x00040130'00001F02, nullptr},
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{"MP", 0x00040130'00002A02, nullptr},
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{"PDN", 0x00040130'00002102, nullptr},
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{"PS", 0x00040130'00003102, nullptr},
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{"SPI", 0x00040130'00002302, nullptr}}};
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/**
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@ -36,6 +36,20 @@ AESKey Add128(const AESKey& a, const AESKey& b) {
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return out;
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}
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AESKey Add128(const AESKey& a, u64 b) {
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AESKey out = a;
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u32 carry = 0;
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u32 sum = 0;
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for (int i = 15; i >= 8; i--) {
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sum = a[i] + static_cast<u8>((b >> ((15 - i) * 8)) & 0xff) + carry;
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carry = sum >> 8;
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out[i] = static_cast<u8>(sum & 0xff);
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}
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return out;
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}
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AESKey Xor128(const AESKey& a, const AESKey& b) {
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AESKey out;
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std::transform(a.cbegin(), a.cend(), b.cbegin(), out.begin(), std::bit_xor<>());
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@ -10,6 +10,7 @@
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namespace HW::AES {
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AESKey Lrot128(const AESKey& in, u32 rot);
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AESKey Add128(const AESKey& a, const AESKey& b);
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AESKey Add128(const AESKey& a, u64 b);
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AESKey Xor128(const AESKey& a, const AESKey& b);
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} // namespace HW::AES
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