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UDS: Run clang-format.
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Subv
parent
9befb8c887
commit
87168bfe8b
3 changed files with 55 additions and 51 deletions
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@ -433,9 +433,8 @@ static void SendTo(Interface* self) {
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// TODO(Subv): Increment the sequence number after each sent packet.
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u16 sequence_number = 0;
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std::vector<u8> data_payload = GenerateDataPayload(data, data_channel, dest_node_id,
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connection_status.network_node_id,
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sequence_number);
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std::vector<u8> data_payload = GenerateDataPayload(
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data, data_channel, dest_node_id, connection_status.network_node_id, sequence_number);
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// TODO(Subv): Retrieve the MAC address of the dest_node_id and our own to encrypt
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// and encapsulate the payload.
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@ -640,7 +639,7 @@ const Interface::FunctionInfo FunctionTable[] = {
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{0x00130040, nullptr, "Unbind"},
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{0x001400C0, nullptr, "PullPacket"},
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{0x00150080, nullptr, "SetMaxSendDelay"},
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{0x00170182, SendTo, "SendTo"},
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{0x00170182, SendTo, "SendTo"},
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{0x001A0000, GetChannel, "GetChannel"},
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{0x001B0302, InitializeWithVersion, "InitializeWithVersion"},
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{0x001D0044, BeginHostingNetwork, "BeginHostingNetwork"},
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@ -3,20 +3,20 @@
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// Refer to the license.txt file included.
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#include <cstring>
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#include "core/hle/service/nwm/nwm_uds.h"
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#include "core/hle/service/nwm/uds_beacon.h"
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#include "core/hle/service/nwm/uds_data.h"
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#include "core/hw/aes/key.h"
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#include <cryptopp/aes.h>
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#include <cryptopp/ccm.h>
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#include <cryptopp/filters.h>
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#include <cryptopp/md5.h>
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#include <cryptopp/modes.h>
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#include "core/hle/service/nwm/nwm_uds.h"
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#include "core/hle/service/nwm/uds_data.h"
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#include "core/hw/aes/key.h"
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namespace Service {
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namespace NWM {
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using MacAddress = std::array<u8, 6>;
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// AES Keyslot used to generate the UDS data frame CCMP key.
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constexpr size_t UDSDataCryptoAESKeySlot = 0x2D;
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@ -39,14 +39,15 @@ static std::vector<u8> GenerateLLCHeader(EtherType protocol) {
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* @returns a buffer with the bytes of the generated header.
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*/
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static std::vector<u8> GenerateSecureDataHeader(u16 data_size, u8 channel, u16 dest_node_id,
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u16 src_node_id, u16 sequence_number) {
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u16 src_node_id, u16 sequence_number) {
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SecureDataHeader header{};
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header.protocol_size = data_size + sizeof(SecureDataHeader);
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// Note: This size includes everything except the first 4 bytes of the structure,
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// reinforcing the hypotheses that the first 4 bytes are actually the header of
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// another container protocol.
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header.securedata_size = data_size + sizeof(SecureDataHeader) - 4;
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header.is_management = 0; // Frames sent by the emulated application are never UDS management frames
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// Frames sent by the emulated application are never UDS management frames
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header.is_management = 0;
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header.data_channel = channel;
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header.sequence_number = sequence_number;
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header.dest_node_id = dest_node_id;
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@ -60,7 +61,7 @@ static std::vector<u8> GenerateSecureDataHeader(u16 data_size, u8 channel, u16 d
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/*
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* Calculates the CTR used for the AES-CTR process that calculates
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* the CCMP crypto key for data frames.
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* the CCMP crypto key for data frames.
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* @returns The CTR used for data frames crypto key generation.
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*/
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static std::array<u8, CryptoPP::MD5::DIGESTSIZE> GetDataCryptoCTR(const NetworkInfo& network_info) {
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@ -81,15 +82,16 @@ static std::array<u8, CryptoPP::MD5::DIGESTSIZE> GetDataCryptoCTR(const NetworkI
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* Generates the key used for encrypting the 802.11 data frames generated by UDS.
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* @returns The key used for data frames crypto.
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*/
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static std::array<u8, CryptoPP::AES::BLOCKSIZE> GenerateDataCCMPKey(const std::vector<u8>& passphrase,
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const NetworkInfo& network_info) {
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static std::array<u8, CryptoPP::AES::BLOCKSIZE> GenerateDataCCMPKey(
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const std::vector<u8>& passphrase, const NetworkInfo& network_info) {
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// Calculate the MD5 hash of the input passphrase.
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std::array<u8, CryptoPP::MD5::DIGESTSIZE> passphrase_hash;
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CryptoPP::MD5().CalculateDigest(passphrase_hash.data(), passphrase.data(), passphrase.size());
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std::array<u8, CryptoPP::AES::BLOCKSIZE> ccmp_key;
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// The CCMP key is the result of encrypting the MD5 hash of the passphrase with AES-CTR using keyslot 0x2D.
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// The CCMP key is the result of encrypting the MD5 hash of the passphrase with AES-CTR using
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// keyslot 0x2D.
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using CryptoPP::AES;
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std::array<u8, CryptoPP::MD5::DIGESTSIZE> counter = GetDataCryptoCTR(network_info);
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std::array<u8, AES::BLOCKSIZE> key = HW::AES::GetNormalKey(UDSDataCryptoAESKeySlot);
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@ -139,21 +141,26 @@ static std::vector<u8> GenerateCCMPAAD(const MacAddress& sender, const MacAddres
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* Decrypts the payload of an encrypted 802.11 data frame using the specified key.
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* @returns The decrypted payload.
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*/
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static std::vector<u8> DecryptDataFrame(const std::vector<u8>& encrypted_payload, const std::array<u8, CryptoPP::AES::BLOCKSIZE>& ccmp_key,
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const MacAddress& sender, const MacAddress& receiver, u16 sequence_number) {
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static std::vector<u8> DecryptDataFrame(const std::vector<u8>& encrypted_payload,
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const std::array<u8, CryptoPP::AES::BLOCKSIZE>& ccmp_key,
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const MacAddress& sender, const MacAddress& receiver,
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u16 sequence_number) {
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// Reference: IEEE 802.11-2007
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std::vector<u8> aad = GenerateCCMPAAD(sender, receiver);
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std::vector<u8> packet_number{0, 0, 0, 0,
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std::vector<u8> packet_number{0,
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0,
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0,
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0,
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static_cast<u8>((sequence_number >> 8) & 0xFF),
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static_cast<u8>(sequence_number & 0xFF)};
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// 8.3.3.3.3 Construct CCM nonce (13 bytes)
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std::vector<u8> nonce;
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nonce.push_back(0); // priority
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nonce.insert(nonce.end(), sender.begin(), sender.end()); // Address 2
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nonce.push_back(0); // priority
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nonce.insert(nonce.end(), sender.begin(), sender.end()); // Address 2
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nonce.insert(nonce.end(), packet_number.begin(), packet_number.end()); // PN
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try {
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@ -161,15 +168,17 @@ static std::vector<u8> DecryptDataFrame(const std::vector<u8>& encrypted_payload
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d.SetKeyWithIV(ccmp_key.data(), ccmp_key.size(), nonce.data(), nonce.size());
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d.SpecifyDataLengths(aad.size(), encrypted_payload.size() - 8, 0);
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CryptoPP::AuthenticatedDecryptionFilter df(d, nullptr,
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CryptoPP::AuthenticatedDecryptionFilter::MAC_AT_END |
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CryptoPP::AuthenticatedDecryptionFilter::THROW_EXCEPTION);
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CryptoPP::AuthenticatedDecryptionFilter df(
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d, nullptr, CryptoPP::AuthenticatedDecryptionFilter::MAC_AT_END |
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CryptoPP::AuthenticatedDecryptionFilter::THROW_EXCEPTION);
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// put aad
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df.ChannelPut(CryptoPP::AAD_CHANNEL, aad.data(), aad.size());
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// put cipher with mac
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df.ChannelPut(CryptoPP::DEFAULT_CHANNEL, encrypted_payload.data(), encrypted_payload.size() - 8);
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df.ChannelPut(CryptoPP::DEFAULT_CHANNEL, encrypted_payload.data() + encrypted_payload.size() - 8, 8);
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df.ChannelPut(CryptoPP::DEFAULT_CHANNEL, encrypted_payload.data(),
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encrypted_payload.size() - 8);
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df.ChannelPut(CryptoPP::DEFAULT_CHANNEL,
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encrypted_payload.data() + encrypted_payload.size() - 8, 8);
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df.ChannelMessageEnd(CryptoPP::AAD_CHANNEL);
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df.ChannelMessageEnd(CryptoPP::DEFAULT_CHANNEL);
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@ -191,20 +200,25 @@ static std::vector<u8> DecryptDataFrame(const std::vector<u8>& encrypted_payload
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* Encrypts the payload of an 802.11 data frame using the specified key.
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* @returns The encrypted payload.
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*/
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static std::vector<u8> EncryptDataFrame(const std::vector<u8>& payload, const std::array<u8, CryptoPP::AES::BLOCKSIZE>& ccmp_key,
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const MacAddress& sender, const MacAddress& receiver, u16 sequence_number) {
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static std::vector<u8> EncryptDataFrame(const std::vector<u8>& payload,
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const std::array<u8, CryptoPP::AES::BLOCKSIZE>& ccmp_key,
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const MacAddress& sender, const MacAddress& receiver,
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u16 sequence_number) {
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// Reference: IEEE 802.11-2007
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std::vector<u8> aad = GenerateCCMPAAD(sender, receiver);
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std::vector<u8> packet_number{0, 0, 0, 0,
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static_cast<u8>((sequence_number >> 8) & 0xFF),
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static_cast<u8>(sequence_number & 0xFF)};
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std::vector<u8> packet_number{0,
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0,
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0,
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0,
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static_cast<u8>((sequence_number >> 8) & 0xFF),
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static_cast<u8>(sequence_number & 0xFF)};
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// 8.3.3.3.3 Construct CCM nonce (13 bytes)
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std::vector<u8> nonce;
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nonce.push_back(0); // priority
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nonce.insert(nonce.end(), sender.begin(), sender.end()); // Address 2
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nonce.push_back(0); // priority
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nonce.insert(nonce.end(), sender.begin(), sender.end()); // Address 2
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nonce.insert(nonce.end(), packet_number.begin(), packet_number.end()); // PN
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try {
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@ -235,11 +249,11 @@ static std::vector<u8> EncryptDataFrame(const std::vector<u8>& payload, const st
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return {};
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}
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std::vector<u8> GenerateDataPayload(const std::vector<u8>& data, u8 channel, u16 dest_node, u16 src_node,
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u16 sequence_number) {
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std::vector<u8> GenerateDataPayload(const std::vector<u8>& data, u8 channel, u16 dest_node,
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u16 src_node, u16 sequence_number) {
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std::vector<u8> buffer = GenerateLLCHeader(EtherType::SecureData);
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std::vector<u8> securedata_header = GenerateSecureDataHeader(data.size(), channel, dest_node, src_node,
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sequence_number);
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std::vector<u8> securedata_header =
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GenerateSecureDataHeader(data.size(), channel, dest_node, src_node, sequence_number);
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buffer.insert(buffer.end(), securedata_header.begin(), securedata_header.end());
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buffer.insert(buffer.end(), data.begin(), data.end());
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@ -6,28 +6,18 @@
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#include <array>
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#include <vector>
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#include "common/common_types.h"
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#include "common/swap.h"
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#include "core/hle/service/service.h"
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#include <cryptopp/aes.h>
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namespace Service {
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namespace NWM {
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enum class SAP : u8 {
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SNAPExtensionUsed = 0xAA
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};
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enum class SAP : u8 { SNAPExtensionUsed = 0xAA };
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enum class PDUControl : u8 {
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UnnumberedInformation = 3
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};
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enum class PDUControl : u8 { UnnumberedInformation = 3 };
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enum class EtherType : u16 {
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SecureData = 0x876D,
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EAPoL = 0x888E
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};
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enum class EtherType : u16 { SecureData = 0x876D, EAPoL = 0x888E };
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/*
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* 802.2 header, UDS packets always use SNAP for these headers,
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@ -81,7 +71,8 @@ static_assert(sizeof(DataFrameCryptoCTR) == 16, "DataFrameCryptoCTR has the wron
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* Generates an unencrypted 802.11 data payload.
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* @returns The generated frame payload.
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*/
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std::vector<u8> GenerateDataPayload(const std::vector<u8>& data, u8 channel, u16 dest_node, u16 src_node, u16 sequence_number);
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std::vector<u8> GenerateDataPayload(const std::vector<u8>& data, u8 channel, u16 dest_node,
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u16 src_node, u16 sequence_number);
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} // namespace NWM
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} // namespace Service
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