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PHKNetworkIP.cpp
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//
// PHKNetworkIP.cpp
// Workbench
//
// Created by Wai Man Chan on 4/8/14.
//
//
#include "PHKNetworkIP.h"
#define PHKNetworkServiceType "_hap._tcp"
#include <iostream>
#include <fstream>
#include <errno.h>
#include <strings.h>
#include <netdb.h>
void (*newConnection)(connectionInfo* info) = 0;
void (*deadConnection)(connectionInfo *info) = 0;
//#include <byteswap.h>
static inline unsigned short bswap_16(unsigned short x) {
return (x>>8) | (x<<8);
}
static inline unsigned int bswap_32(unsigned int x) {
return (bswap_16(x&0xffff)<<16) | (bswap_16(x>>16));
}
static inline unsigned long long bswap_64(unsigned long long x) {
return x;//(((unsigned long long)bswap_32(x&0xffffffffull))<<32) |
// (bswap_32(x>>32));
}
//Security
extern "C" {
//ChaCha20-Poly1035
#include "poly1305-opt-master/poly1305.h"
#include "Chacha20/chacha20_simple.h"
//HKDF-SHA512
#include "rfc6234-master/hkdf.h"
//ED25519
#include "ed25519-donna/ed25519.h"
//Curve25519
#include "curve25519/curve25519-donna.h"
//SRP
#include "srp/srp.h"
}
//Store controller public key
#include "PHKControllerRecord.h"
//Handle Data
#include "PHKAccessory.h"
#include "Configuration.h"
#if MCU
#else
#include <pthread.h>
#endif
using namespace std;
#define portNumber 0
#if MCU
#else
connectionInfo connection[numberOfClient];
#endif
void *stayAliveTrigger(void *threadInfo) {
//For every 10 seconds, this thread will wake, and send a keep alive message
while (true) {
printf("Keep Alive");
broadcastInfo *alivePackage = new broadcastInfo;
alivePackage->sender = NULL;
char *aliveMsg = new char[32];
strncpy(aliveMsg, "{\"characteristics\": []}", 32);
alivePackage->desc = aliveMsg;
announce(alivePackage);
sleep(keepAlivePeriod);
}
}
pthread_t aliveThread;
const unsigned char modulusStr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xC9, 0x0F, 0xDA, 0xA2, 0x21, 0x68, 0xC2, 0x34, 0xC4, 0xC6, 0x62, 0x8B, 0x80, 0xDC, 0x1C, 0xD1, 0x29, 0x02, 0x4E, 0x08, 0x8A, 0x67, 0xCC, 0x74, 0x02, 0x0B, 0xBE, 0xA6, 0x3B, 0x13, 0x9B, 0x22, 0x51, 0x4A, 0x08, 0x79, 0x8E, 0x34, 0x04, 0xDD, 0xEF, 0x95, 0x19, 0xB3, 0xCD, 0x3A, 0x43, 0x1B, 0x30, 0x2B, 0x0A, 0x6D, 0xF2, 0x5F, 0x14, 0x37, 0x4F, 0xE1, 0x35, 0x6D, 0x6D, 0x51, 0xC2, 0x45, 0xE4, 0x85, 0xB5, 0x76, 0x62, 0x5E, 0x7E, 0xC6, 0xF4, 0x4C, 0x42, 0xE9, 0xA6, 0x37, 0xED, 0x6B, 0x0B, 0xFF, 0x5C, 0xB6, 0xF4, 0x06, 0xB7, 0xED, 0xEE, 0x38, 0x6B, 0xFB, 0x5A, 0x89, 0x9F, 0xA5, 0xAE, 0x9F, 0x24, 0x11, 0x7C, 0x4B, 0x1F, 0xE6, 0x49, 0x28, 0x66, 0x51, 0xEC, 0xE4, 0x5B, 0x3D, 0xC2, 0x00, 0x7C, 0xB8, 0xA1, 0x63, 0xBF, 0x05, 0x98, 0xDA, 0x48, 0x36, 0x1C, 0x55, 0xD3, 0x9A, 0x69, 0x16, 0x3F, 0xA8, 0xFD, 0x24, 0xCF, 0x5F, 0x83, 0x65, 0x5D, 0x23, 0xDC, 0xA3, 0xAD, 0x96, 0x1C, 0x62, 0xF3, 0x56, 0x20, 0x85, 0x52, 0xBB, 0x9E, 0xD5, 0x29, 0x07, 0x70, 0x96, 0x96, 0x6D, 0x67, 0x0C, 0x35, 0x4E, 0x4A, 0xBC, 0x98, 0x04, 0xF1, 0x74, 0x6C, 0x08, 0xCA, 0x18, 0x21, 0x7C, 0x32, 0x90, 0x5E, 0x46, 0x2E, 0x36, 0xCE, 0x3B, 0xE3, 0x9E, 0x77, 0x2C, 0x18, 0x0E, 0x86, 0x03, 0x9B, 0x27, 0x83, 0xA2, 0xEC, 0x07, 0xA2, 0x8F, 0xB5, 0xC5, 0x5D, 0xF0, 0x6F, 0x4C, 0x52, 0xC9, 0xDE, 0x2B, 0xCB, 0xF6, 0x95, 0x58, 0x17, 0x18, 0x39, 0x95, 0x49, 0x7C, 0xEA, 0x95, 0x6A, 0xE5, 0x15, 0xD2, 0x26, 0x18, 0x98, 0xFA, 0x05, 0x10, 0x15, 0x72, 0x8E, 0x5A, 0x8A, 0xAA, 0xC4, 0x2D, 0xAD, 0x33, 0x17, 0x0D, 0x04, 0x50, 0x7A, 0x33, 0xA8, 0x55, 0x21, 0xAB, 0xDF, 0x1C, 0xBA, 0x64, 0xEC, 0xFB, 0x85, 0x04, 0x58, 0xDB, 0xEF, 0x0A, 0x8A, 0xEA, 0x71, 0x57, 0x5D, 0x06, 0x0C, 0x7D, 0xB3, 0x97, 0x0F, 0x85, 0xA6, 0xE1, 0xE4, 0xC7, 0xAB, 0xF5, 0xAE, 0x8C, 0xDB, 0x09, 0x33, 0xD7, 0x1E, 0x8C, 0x94, 0xE0, 0x4A, 0x25, 0x61, 0x9D, 0xCE, 0xE3, 0xD2, 0x26, 0x1A, 0xD2, 0xEE, 0x6B, 0xF1, 0x2F, 0xFA, 0x06, 0xD9, 0x8A, 0x08, 0x64, 0xD8, 0x76, 0x02, 0x73, 0x3E, 0xC8, 0x6A, 0x64, 0x52, 0x1F, 0x2B, 0x18, 0x17, 0x7B, 0x20, 0x0C, 0xBB, 0xE1, 0x17, 0x57, 0x7A, 0x61, 0x5D, 0x6C, 0x77, 0x09, 0x88, 0xC0, 0xBA, 0xD9, 0x46, 0xE2, 0x08, 0xE2, 0x4F, 0xA0, 0x74, 0xE5, 0xAB, 0x31, 0x43, 0xDB, 0x5B, 0xFC, 0xE0, 0xFD, 0x10, 0x8E, 0x4B, 0x82, 0xD1, 0x20, 0xA9, 0x3A, 0xD2, 0xCA, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
const unsigned char curveBasePoint[] = { 0x09, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
const unsigned char generator[] = {0x05};
char tempStr[3073];
const unsigned char accessorySecretKey[32] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xC9, 0x0F, 0xDA, 0xA2, 0x21, 0x68, 0xC2, 0x34, 0xC4, 0xC6, 0x62, 0x8B, 0x80, 0xDC, 0x1C, 0xD1, 0x29, 0x02, 0x4E, 0x08, 0x8A, 0x67, 0xCC, 0x74};
int _socket_v4, _socket_v6;
DNSServiceRef netServiceV4, netServiceV6;
deviceType currentDeviceType = deviceType_other;
int currentConfigurationNum = 1;
int is_big_endian(void)
{
union {
uint32_t i;
char c[4];
} e = { 0x01000000 };
return e.c[0];
}
//Network Setup
int setupSocketV4(unsigned int maximumConnection) {
int _socket = socket(PF_INET, SOCK_STREAM, 0);
sockaddr_in addr; bzero(&addr, sizeof(addr));
addr.sin_addr.s_addr = htonl(INADDR_ANY); addr.sin_family = PF_INET; addr.sin_port = htons(portNumber);
int optval = 1; socklen_t optlen = sizeof(optval);
setsockopt(_socket, SOL_SOCKET, SO_KEEPALIVE, &optval, optlen);
bind(_socket, (const struct sockaddr *)&addr, sizeof(addr));
listen(_socket, maximumConnection);
return _socket;
}
int setupSocketV6(unsigned int maximumConnection) {
int _socket = socket(PF_INET6, SOCK_STREAM, 0);
sockaddr_in6 addr; bzero(&addr, sizeof(addr));
addr.sin6_addr = in6addr_any; addr.sin6_family = PF_INET6; addr.sin6_port = htons(portNumber);
bind(_socket, (const struct sockaddr *)&addr, sizeof(addr));
listen(_socket, maximumConnection);
return _socket;
}
unsigned short getSocketPortNumberV4(int _socket) {
sockaddr_in addr; socklen_t len = sizeof(addr);
getsockname(_socket, (struct sockaddr *)&addr, &len);
return ntohs(addr.sin_port);
}
unsigned short getSocketPortNumberV6(int _socket) {
sockaddr_in6 addr; socklen_t len = sizeof(addr);
getsockname(_socket, (struct sockaddr *)&addr, &len);
return ntohs(addr.sin6_port);
}
void registerFail(DNSServiceRef sdRef, DNSRecordRef RecordRef, DNSServiceFlags flags, DNSServiceErrorType errorCode, void *context ) {
#if HomeKitLog == 1
printf("Service can't register\n");
#endif
exit(0);
}
TXTRecordRef buildTXTRecord() {
TXTRecordRef txtRecord;
TXTRecordCreate(&txtRecord, 0, NULL);
TXTRecordSetValue(&txtRecord, "pv", 3, "1.0"); //Version
TXTRecordSetValue(&txtRecord, "id", 17, deviceIdentity); //Device id
char buf[3];
sprintf(buf, "%d", currentConfigurationNum);
TXTRecordSetValue(&txtRecord, "c#", 1, buf); //Configuration Number
TXTRecordSetValue(&txtRecord, "s#", 1, "4"); //Number of service
if (hasController()) buf[0] = '0';
else buf[0] = '1';
TXTRecordSetValue(&txtRecord, "sf", 1, buf); //Discoverable: 0 if has been paired
TXTRecordSetValue(&txtRecord, "ff", 1, "0"); //1 for MFI product
TXTRecordSetValue(&txtRecord, "md", strlen(deviceName), deviceName); //Model Name
int len = sprintf(buf, "%d", currentDeviceType);
TXTRecordSetValue(&txtRecord, "ci", len, buf); //1 for MFI product
return txtRecord;
}
void updatePairable() {
TXTRecordRef txtRecord = buildTXTRecord();
DNSServiceUpdateRecord(netServiceV4, NULL, 0, TXTRecordGetLength(&txtRecord), TXTRecordGetBytesPtr(&txtRecord), 0);
TXTRecordDeallocate(&txtRecord);
}
void updateConfiguration() {
currentConfigurationNum++;
TXTRecordRef txtRecord = buildTXTRecord();
DNSServiceUpdateRecord(netServiceV4, NULL, 0, TXTRecordGetLength(&txtRecord), TXTRecordGetBytesPtr(&txtRecord), 0);
TXTRecordDeallocate(&txtRecord);
}
void PHKNetworkIP::setupSocket() {
TXTRecordRef txtRecord = buildTXTRecord();
_socket_v4 = setupSocketV4(5);
DNSServiceRegister(&netServiceV4, 0, 0, deviceName, PHKNetworkServiceType, "", NULL, htons(getSocketPortNumberV4(_socket_v4)), TXTRecordGetLength(&txtRecord), TXTRecordGetBytesPtr(&txtRecord), NULL, NULL);
TXTRecordDeallocate(&txtRecord);
}
PHKNetworkIP::PHKNetworkIP() {
SRP_initialize_library();
srand((unsigned int)time(NULL));
for (int i = 0; i < numberOfClient; i++) {
connection[i].subSocket = -1;
}
pthread_create(&aliveThread, NULL, stayAliveTrigger, NULL);
setupSocket();
}
//Broadcast a event message, use for notifcation or keep alive
void broadcastMessage(void *sender, char *resultData, size_t resultLen) {
for (int i = 0; i < numberOfClient; i++) {
int socketNumber = connection[i].subSocket;
if (socketNumber >= 0 && connection[i].connected && connection[i].numberOfMsgSend >= 0 && (connection[i].notify(sender) || sender == NULL ) ){
#if HomeKitLog == 1
printf("Broadcast with sender a %d message to client %d\n", resultLen, socketNumber);
#endif
pthread_mutex_lock(&connection[i].mutex);
chacha20_ctx chacha20; bzero(&chacha20, sizeof(chacha20));
char temp[64]; bzero(temp, 64); char temp2[64]; bzero(temp2, 64);
unsigned char *reply = new unsigned char[resultLen+18];
reply[0] = resultLen%256;
reply[1] = (resultLen-(uint8_t)reply[0])/256;
unsigned long long numberOfMsgSend = connection[i].numberOfMsgSend;
if (!is_big_endian()) numberOfMsgSend = bswap_64(connection[i].numberOfMsgSend);
chacha20_setup(&chacha20, (const uint8_t *)connection[i].accessoryToControllerKey, 32, (uint8_t *)&numberOfMsgSend);
connection[i].numberOfMsgSend++;
//chacha20_setup(&chacha20, (const uint8_t *)connection[i].accessoryToControllerKey, 32, (uint8_t *)&connection[i].numberOfMsgSend);
//connection[i].numberOfMsgSend++;
chacha20_encrypt(&chacha20, (const uint8_t*)temp, (uint8_t *)temp2, 64);
chacha20_encrypt(&chacha20, (const uint8_t*)resultData, (uint8_t*)&reply[2], resultLen);
//XXX FIXME
#if 0
poly1305_context verifyContext; bzero(&verifyContext, sizeof(verifyContext));
poly1305_init(&verifyContext, (const unsigned char*)temp2);
{
char waste[16];
bzero(waste, 16);
poly1305_update(&verifyContext, (const unsigned char *)reply, 2);
poly1305_update(&verifyContext, (const unsigned char *)waste, 14);
poly1305_update(&verifyContext, (const unsigned char *)&reply[2], resultLen);
if (resultLen%16 > 0)
poly1305_update(&verifyContext, (const unsigned char *)waste, 16-(resultLen%16));
//poly1305_update(&verifyContext, (const unsigned char *)waste, 16-resultLen%16);
unsigned long long _len;
_len = 2;
poly1305_update(&verifyContext, (const unsigned char *)&_len, 8);
_len = resultLen;
poly1305_update(&verifyContext, (const unsigned char *)&_len, 8);
}
poly1305_finish(&verifyContext, (unsigned char*)&reply[resultLen+2]);
#else
char verify[16];
memset(verify, 0, 16);
connection[i].Poly1305_GenKey((const unsigned char *)temp2, (uint8_t *)reply, resultLen, Type_Data_With_Length, verify);
memcpy((unsigned char*)&reply[resultLen+2], verify, 16);
#endif
write(socketNumber, reply, resultLen+18);
delete [] reply;
pthread_mutex_unlock(&connection[i].mutex);
}
}
}
void *connectionLoop(void *threadInfo) {
connectionInfo *info = (connectionInfo *)threadInfo;
int subSocket = info->subSocket; ssize_t len;
if (subSocket >= 0) {
#if HomeKitLog == 1
printf("Start Connect: %d\n", subSocket);
#endif
do {
len = read(subSocket, info->buffer, 4096);
#if HomeKitLog == 1
printf("Return len %d for socket %d\n", len, subSocket);
#endif
#if HomeKitReplyHeaderLog == 1
printf("Message: %s\n", info->buffer);
#endif
PHKNetworkMessage msg(info->buffer);
if (len > 0) {
if (!strcmp(msg.directory, "pair-setup")){
/*
* The process of pair-setup
*/
info->handlePairSeup();
updateConfiguration();
}
else if (!strcmp(msg.directory, "pair-verify")){
info->handlePairVerify();
//When pair-verify done, we handle Accessory Request
info->handleAccessoryRequest();
}
else if (!strcmp(msg.directory, "identify")){
close(subSocket);
}
}
} while (len > 0);
close(subSocket);
#if HomeKitLog == 1
printf("Stop Connect: %d\n", subSocket);
#endif
info->subSocket = -1;
}
return NULL;
}
void PHKNetworkIP::handleConnection() const {
struct sockaddr_in client_addr; socklen_t clen;
int subSocket = accept(_socket_v4, (struct sockaddr *)&client_addr, &clen);
//Before anything start, get sniff the host name of the client
string socketName = "";
if (clen == sizeof(struct sockaddr_in)) {
char buffer[1024];
int res = getnameinfo((struct sockaddr *)&client_addr, clen, buffer, 1024, NULL, 0, NI_NOFQDN);
socketName = string(buffer);
}
int index = -1;
for (int i = 0; i < numberOfClient; i++) {
if (connection[i].subSocket == -1) {
index = i;
connection[index].subSocket = subSocket;
connection[index].hostname = socketName;
pthread_create(&connection[index].thread, NULL, connectionLoop, &connection[index]);
break;
}
}
//Too much connection?
if (index < 0) close(subSocket);
}
// 2ByteS(datalen) + data_buf + 16Bytes(Verfied Key)
// Type_Data_Without_Length
//Passed-in buf is OMIT len and 16Bytes verfied key
// Type_Data_With_Length
//Passed-in buf is len and data_buf
void connectionInfo::Poly1305_GenKey(const unsigned char * key, uint8_t * buf, uint16_t len, Poly1305Type_t type, char* verify)
{
if (key == NULL || buf == NULL || len < 2 || verify == NULL)
return;
poly1305_context verifyContext; bzero(&verifyContext, sizeof(verifyContext));
poly1305_init(&verifyContext, key);
char waste[16];
bzero(waste, 16);
if (type == Type_Data_With_Length) {
poly1305_update(&verifyContext, (const unsigned char *)&buf[0], 1);
poly1305_update(&verifyContext, (const unsigned char *)&buf[1], 1);
poly1305_update(&verifyContext, (const unsigned char *)waste, 14);
poly1305_update(&verifyContext, (const unsigned char *)&buf[2], len);
}
else {
poly1305_update(&verifyContext, (const unsigned char *)buf, len);
}
if (len%16 > 0)
poly1305_update(&verifyContext, (const unsigned char *)waste, 16-(len%16));
unsigned char _len;
if (type == Type_Data_With_Length) {
_len = 2;
}
else {
_len = 0;
}
poly1305_update(&verifyContext, (const unsigned char *)&_len, 1);
poly1305_update(&verifyContext, (const unsigned char *)&waste, 7);
_len = len;
poly1305_update(&verifyContext, (const unsigned char *)&_len, 1);
_len = len/256;
poly1305_update(&verifyContext, (const unsigned char *)&_len, 1);
poly1305_update(&verifyContext, (const unsigned char *)&waste, 6);
poly1305_finish(&verifyContext, (unsigned char*)verify);
}
void connectionInfo::handlePairSeup() {
identity[36] = 0;
PHKNetworkMessageDataRecord stateRecord;
stateRecord.activate = true;
stateRecord.data = new char[1];
stateRecord.length = 1;
stateRecord.index = 6;
PairSetupState_t state = State_M1_SRPStartRequest;
SRP *srp;
srp = SRP_new(SRP6a_server_method());
cstr *secretKey = NULL, *publicKey = NULL, *response = NULL;
char sessionKey[64];
char *responseBuffer = 0; int responseLen = 0;
do {
PHKNetworkMessage msg = PHKNetworkMessage(buffer);
PHKNetworkResponse mResponse(200);
state = (PairSetupState_t)(*msg.data.dataPtrForIndex(6));
*stateRecord.data = (char)state+1;
switch (state) {
case State_M1_SRPStartRequest: {
#if HomeKitLog == 1
printf("%s, %d: State_M1_SRPStartRequest\n", __func__, __LINE__);
#endif
PHKNetworkMessageDataRecord saltRec;
PHKNetworkMessageDataRecord publicKeyRec;
unsigned char saltChar[16];
for (int i = 0; i < 16; i++) {
saltChar[i] = rand();
}
SRP_RESULT result = SRP_set_username(srp, "Pair-Setup");
int modulusSize = sizeof(modulusStr) / sizeof(modulusStr[0]);
result = SRP_set_params(srp, (const unsigned char *)modulusStr, modulusSize, (const unsigned char *)generator, 1, saltChar, 16);
result = SRP_set_auth_password(srp, devicePassword);
result = SRP_gen_pub(srp, &publicKey);
saltRec.index = 2;
saltRec.activate = true;
saltRec.length = 16;
saltRec.data = new char[saltRec.length];
bcopy(saltChar, saltRec.data, saltRec.length);
publicKeyRec.index = 3;
publicKeyRec.activate = true;
publicKeyRec.length = publicKey->length;
publicKeyRec.data = new char[publicKeyRec.length];
bcopy(publicKey->data, publicKeyRec.data, publicKeyRec.length);
mResponse.data.addRecord(stateRecord);
mResponse.data.addRecord(publicKeyRec);
mResponse.data.addRecord(saltRec);
}
break;
case State_M3_SRPVerifyRequest: {
#if HomeKitLog == 1
printf("%s, %d: State_M3_SRPVerifyRequest\n", __func__, __LINE__);
#endif
const char *keyStr = 0;
int keyLen = 0;
const char *proofStr;
int proofLen;
keyStr = msg.data.dataPtrForIndex(3);
keyLen = msg.data.lengthForIndex(3);
char *temp = msg.data.dataPtrForIndex(4);
if (temp != NULL) {
proofStr = temp;
proofLen = msg.data.lengthForIndex(4);
}
SRP_RESULT result = SRP_compute_key(srp, &secretKey, (const unsigned char*)keyStr, keyLen);
result = SRP_verify(srp, (const unsigned char*)proofStr, proofLen);
if (!SRP_OK(result)) {
PHKNetworkMessageDataRecord responseRecord;
responseRecord.activate = true;
responseRecord.data = new char[1];
responseRecord.data[0] = 2;
responseRecord.index = 7;
responseRecord.length = 1;
mResponse.data.addRecord(responseRecord);
#if HomeKitLog == 1
printf("Oops at M3\n");
#endif
} else {
SRP_respond(srp, &response);
PHKNetworkMessageDataRecord responseRecord;
responseRecord.activate = true;
responseRecord.index = 4;
responseRecord.length = response->length;
responseRecord.data = new char[responseRecord.length];
bcopy(response->data, responseRecord.data, responseRecord.length);
mResponse.data.addRecord(responseRecord);
#if HomeKitLog == 1
printf("Password Correct\n");
#endif
}
const char salt[] = "Pair-Setup-Encrypt-Salt";
const char info[] = "Pair-Setup-Encrypt-Info";
int i = hkdf((const unsigned char*)salt, strlen(salt), (const unsigned char*)secretKey->data, secretKey->length, (const unsigned char*)info, strlen(info), (uint8_t*)sessionKey, 32);
if (i != 0) return;
}
break;
case State_M5_ExchangeRequest: {
#if HomeKitLog == 1
printf("%s, %d: State_M5_ExchangeRequest\n", __func__, __LINE__);
#endif
const char *encryptedPackage = NULL;int packageLen = 0;
encryptedPackage = msg.data.dataPtrForIndex(5);
packageLen = msg.data.lengthForIndex(5);
char *encryptedData = new char[packageLen];
bcopy(encryptedPackage, encryptedData, packageLen-16);
char mac[16];
bcopy(&encryptedPackage[packageLen-16], mac, 16);
chacha20_ctx chacha20; bzero(&chacha20, sizeof(chacha20));
chacha20_setup(&chacha20, (const uint8_t *)sessionKey, 32, (uint8_t *)"PS-Msg05");
//Ploy1305 key
char temp[64]; bzero(temp, 64); char temp2[64]; bzero(temp2, 64);
chacha20_encrypt(&chacha20, (const uint8_t*)temp, (uint8_t *)temp2, 64);
char verify[16]; bzero(verify, 16);
Poly1305_GenKey((const unsigned char*)temp2, (unsigned char *)encryptedData, packageLen - 16, Type_Data_Without_Length, verify);
char *decryptedData = new char[packageLen-16];
bzero(decryptedData, packageLen-16);
chacha20_decrypt(&chacha20, (const uint8_t *)encryptedData, (uint8_t *)decryptedData, packageLen-16);
if (bcmp(verify, mac, 16)) {
PHKNetworkMessageDataRecord responseRecord;
responseRecord.activate = true;
responseRecord.data = new char[1];
responseRecord.data[0] = 1;
responseRecord.index = 7;
responseRecord.length = 1;
mResponse.data.addRecord(responseRecord);
#if HomeKitLog == 1
for(int j = 0; j < packageLen-16; j++)
printf("%X ", decryptedData[j]);
printf("\n");
printf("verify: ");
for(int j = 0; j < 16; j++)
printf("%X ", verify[j]);
printf("\n");
printf("mac: ");
for(int j = 0; j < 16; j++)
printf("%X ", mac[j]);
printf("\n");
printf("Corrupt TLv8 at M5\n");
#endif
} else {
/*
* HAK Pair Setup M6
*/
PHKNetworkMessageData *subTLV8 = new PHKNetworkMessageData(decryptedData, packageLen-16);
char *controllerIdentifier = subTLV8->dataPtrForIndex(1);
char *controllerPublicKey = subTLV8->dataPtrForIndex(3);
char *controllerSignature = subTLV8->dataPtrForIndex(10);
char controllerHash[100];
PHKKeyRecord newRecord;
bcopy(controllerIdentifier, newRecord.controllerID, 36);
bcopy(controllerPublicKey, newRecord.publicKey, 32);
addControllerKey(newRecord);
const char salt[] = "Pair-Setup-Controller-Sign-Salt";
const char info[] = "Pair-Setup-Controller-Sign-Info";
int i = hkdf((const unsigned char*)salt, strlen(salt), (const unsigned char*)secretKey->data, secretKey->length, (const unsigned char*)info, strlen(info), (uint8_t*)controllerHash, 32);
if (i != 0) return;
bcopy(controllerIdentifier, &controllerHash[32], 36);
bcopy(controllerPublicKey, &controllerHash[68], 32);
int ed25519_err = ed25519_sign_open((const unsigned char*)controllerHash, 100, (const unsigned char*)controllerPublicKey, (const unsigned char*)controllerSignature);
delete subTLV8;
if (ed25519_err) return;
else {
PHKNetworkMessageData *returnTLV8 = new PHKNetworkMessageData();
{
PHKNetworkMessageDataRecord usernameRecord;
usernameRecord.activate = true; usernameRecord.index = 1; usernameRecord.length = strlen(deviceIdentity); usernameRecord.data = new char[usernameRecord.length]; bcopy(deviceIdentity, usernameRecord.data, usernameRecord.length);
returnTLV8->addRecord(usernameRecord);
}
{
/*
* Generate Signature
*/
const char salt[] = "Pair-Setup-Accessory-Sign-Salt";
const char info[] = "Pair-Setup-Accessory-Sign-Info";
uint8_t output[150];
hkdf((const unsigned char*)salt, strlen(salt), (const unsigned char*)secretKey->data, secretKey->length, (const unsigned char*)info, strlen(info), output, 32);
bcopy(deviceIdentity, &output[32], strlen(deviceIdentity));
char *signature = new char[64];
ed25519_secret_key edSecret;
bcopy(accessorySecretKey, edSecret, sizeof(edSecret));
ed25519_public_key edPubKey;
ed25519_publickey(edSecret, edPubKey);
bcopy(edPubKey, &output[32+strlen(deviceIdentity)], 32);
ed25519_sign(output, 64+strlen(deviceIdentity), (const unsigned char*)edSecret, (const unsigned char*)edPubKey, (unsigned char *)signature);
PHKNetworkMessageDataRecord signatureRecord;
signatureRecord.activate = true; signatureRecord.data = signature; signatureRecord.index = 10; signatureRecord.length = 64;
returnTLV8->addRecord(signatureRecord);
PHKNetworkMessageDataRecord publicKeyRecord;
publicKeyRecord.activate = true;
publicKeyRecord.index = 3;
publicKeyRecord.length = 32;
publicKeyRecord.data = new char[publicKeyRecord.length];
bcopy(edPubKey, publicKeyRecord.data, publicKeyRecord.length);
returnTLV8->addRecord(publicKeyRecord);
}
const char *tlv8Data;unsigned short tlv8Len;
returnTLV8->rawData(&tlv8Data, &tlv8Len);
PHKNetworkMessageDataRecord tlv8Record;
tlv8Record.data = new char[tlv8Len+16];tlv8Record.length = tlv8Len+16;
bzero(tlv8Record.data, tlv8Record.length);
{
chacha20_ctx ctx; bzero(&ctx, sizeof(ctx));
chacha20_setup(&ctx, (const uint8_t *)sessionKey, 32, (uint8_t *)"PS-Msg06");
char buffer[64], key[64]; bzero(buffer, 64);
chacha20_encrypt(&ctx, (const uint8_t *)buffer, (uint8_t *)key, 64);
chacha20_encrypt(&ctx, (const uint8_t *)tlv8Data, (uint8_t *)tlv8Record.data, tlv8Len);
char verify[16];
memset(verify, 0, 16);
Poly1305_GenKey((const unsigned char *)key, (unsigned char*)tlv8Record.data, tlv8Len, Type_Data_Without_Length, verify);
memcpy((unsigned char *)&tlv8Record.data[tlv8Len], verify, 16);
}
tlv8Record.activate = true; tlv8Record.index = 5;
mResponse.data.addRecord(tlv8Record);
delete returnTLV8;
}
}
mResponse.data.addRecord(stateRecord);
mResponse.getBinaryPtr(&responseBuffer, &responseLen);
if (responseBuffer) {
write(subSocket, (const void *)responseBuffer, (size_t)responseLen);
delete [] responseBuffer;
}
delete []encryptedData;
return;
}
break;
}
mResponse.data.addRecord(stateRecord);
mResponse.getBinaryPtr(&responseBuffer, &responseLen);
if (responseBuffer) {
#if HomeKitLog == 1
printf("%s, %d, responseBuffer = %s, responseLen = %d\n", __func__, __LINE__, responseBuffer, responseLen);
#endif
int len = write(subSocket, (const void *)responseBuffer, (size_t)responseLen);
delete [] responseBuffer;
#if HomeKitLog == 1
printf("Pair Setup Transfered length %d\n", len);
#endif
} else {
#if HomeKitLog == 1
printf("Why empty response\n");
#endif
}
} while (read(subSocket, (void *)buffer, 4096) > 0);
SRP_free(srp);
}
void connectionInfo::handlePairVerify() {
bool end = false;
char state = State_Pair_Verify_M1;
curved25519_key secretKey;
curved25519_key publicKey;
curved25519_key controllerPublicKey;
curved25519_key sharedKey;
uint8_t enKey[32];
#if HomeKitLog == 1
printf("Start Pair Verify\n");
#endif
do {
PHKNetworkMessage msg(buffer);
PHKNetworkResponse response = PHKNetworkResponse(200);
bcopy(msg.data.dataPtrForIndex(6), &state, 1);
switch (state) {
case State_Pair_Verify_M1: {
#if HomeKitLog == 1
printf("Pair Verify M1\n");
#endif
bcopy(msg.data.dataPtrForIndex(3), controllerPublicKey, 32);
for (short i = 0; i < sizeof(secretKey); i++) {
secretKey[i] = rand();
}
curve25519_donna((u8*)publicKey, (const u8 *)secretKey, (const u8 *)curveBasePoint);
curve25519_donna(sharedKey, secretKey, controllerPublicKey);
char *temp = new char[100];
bcopy(publicKey, temp, 32);
bcopy(deviceIdentity, &temp[32], strlen(deviceIdentity));
bcopy(controllerPublicKey, &temp[32+strlen(deviceIdentity)], 32);
PHKNetworkMessageDataRecord signRecord;
signRecord.activate = true; signRecord.data = new char[64]; signRecord.index = 10; signRecord.length = 64;
ed25519_secret_key edSecret;
bcopy(accessorySecretKey, edSecret, sizeof(edSecret));
ed25519_public_key edPubKey;
ed25519_publickey(edSecret, edPubKey);
ed25519_sign((const unsigned char *)temp, 64+strlen(deviceIdentity), edSecret, edPubKey, (unsigned char *)signRecord.data);
delete [] temp;
PHKNetworkMessageDataRecord idRecord;
idRecord.activate = true;
idRecord.data = new char[17];
bcopy(deviceIdentity, idRecord.data, 17);
idRecord.index = 1;
idRecord.length = (unsigned int)17;
PHKNetworkMessageDataRecord pubKeyRecord;
pubKeyRecord.activate = true;
pubKeyRecord.data = new char[32];
bcopy(publicKey, pubKeyRecord.data, 32);
pubKeyRecord.index = 3;
pubKeyRecord.length = 32;
PHKNetworkMessageData data;
response.data.addRecord(pubKeyRecord);
data.addRecord(signRecord);
data.addRecord(idRecord);
unsigned char salt[] = "Pair-Verify-Encrypt-Salt";
unsigned char info[] = "Pair-Verify-Encrypt-Info";
int i = hkdf(salt, 24, sharedKey, 32, info, 24, enKey, 32);
const char *plainMsg = 0; unsigned short msgLen = 0;
data.rawData(&plainMsg, &msgLen);
char *encryptMsg = new char[msgLen+16];
char *polyKey = new char[64]; bzero(polyKey, 64);
char zero[64]; bzero(zero, 64);
chacha20_ctx chacha;
chacha20_setup(&chacha, enKey, 32, (uint8_t *)"PV-Msg02");
chacha20_encrypt(&chacha, (uint8_t *)zero, (uint8_t *)polyKey, 64);
chacha20_encrypt(&chacha, (uint8_t *)plainMsg, (uint8_t *)encryptMsg, msgLen);
delete [] plainMsg;
char verify[16];
memset(verify, 0, 16);
Poly1305_GenKey((const unsigned char *)polyKey, (uint8_t *)encryptMsg, msgLen, Type_Data_Without_Length, verify);
memcpy((unsigned char *)&encryptMsg[msgLen], verify, 16);
PHKNetworkMessageDataRecord encryptRecord;
encryptRecord.activate = true;
encryptRecord.index = 5;
encryptRecord.length = msgLen+16;
encryptRecord.data = new char[encryptRecord.length];
bcopy(encryptMsg, encryptRecord.data, encryptRecord.length);
response.data.addRecord(encryptRecord);
delete [] encryptMsg;
delete [] polyKey;
}
break;
case State_Pair_Verify_M3: {
#if HomeKitLog == 1
printf("Pair Verify M3\n");
#endif
char *encryptedData = msg.data.dataPtrForIndex(5);
short packageLen = msg.data.lengthForIndex(5);
chacha20_ctx chacha20; bzero(&chacha20, sizeof(chacha20));
chacha20_setup(&chacha20, (const uint8_t *)enKey, 32, (uint8_t *)"PV-Msg03");
//Ploy1305 key
char temp[64]; bzero(temp, 64); char temp2[64]; bzero(temp2, 64);
chacha20_encrypt(&chacha20, (const uint8_t*)temp, (uint8_t *)temp2, 64);
char verify[16]; bzero(verify, 16);
Poly1305_GenKey((const unsigned char *)temp2, (uint8_t *)encryptedData, packageLen - 16, Type_Data_Without_Length, verify);
if (!bcmp(verify, &encryptedData[packageLen-16], 16)) {
char *decryptData = new char[packageLen-16];
chacha20_decrypt(&chacha20, (const uint8_t *)encryptedData, (uint8_t *)decryptData, packageLen-16);
PHKNetworkMessageData data = PHKNetworkMessageData(decryptData, packageLen-16);
PHKKeyRecord rec = getControllerKey(data.dataPtrForIndex(1));
char tempMsg[100];
bcopy(controllerPublicKey, tempMsg, 32);
bcopy(data.dataPtrForIndex(1), &tempMsg[32], 36);
bcopy(data.dataPtrForIndex(1), identity, 36);
bcopy(publicKey, &tempMsg[68], 32);
int err = ed25519_sign_open((const unsigned char *)tempMsg, 100, (const unsigned char *)rec.publicKey, (const unsigned char *)data.dataPtrForIndex(10));
char *repBuffer = 0; int repLen = 0;
if (err == 0) {
end = true;
hkdf((uint8_t *)"Control-Salt", 12, sharedKey, 32, (uint8_t *)"Control-Read-Encryption-Key", 27, accessoryToControllerKey, 32);
hkdf((uint8_t *)"Control-Salt", 12, sharedKey, 32, (uint8_t *)"Control-Write-Encryption-Key", 28, controllerToAccessoryKey, 32);
#if HomeKitLog == 1
printf("Verify success\n");
#endif
} else {
PHKNetworkMessageDataRecord error;
error.activate = true;
error.data = new char[1];
error.data[0] = 2;
error.index = 7;
error.length = 1;
response.data.addRecord(error);
#if HomeKitLog == 1
printf("Verify failed\n");
#endif
}
delete [] decryptData;
}
}
}
PHKNetworkMessageDataRecord stage;
stage.activate = true;
stage.data = new char;
stage.data[0] = (char)state+1;
stage.index = 6;
stage.length = 1;
response.data.addRecord(stage);
char *repBuffer = 0; int repLen = 0;
response.getBinaryPtr(&repBuffer, &repLen);
if (repBuffer) {
write(subSocket, repBuffer, repLen);
delete [] repBuffer;
}
} while (!end && read(subSocket, buffer, 4096) > 0);
}
void connectionInfo::handleAccessoryRequest() {
//New connection has finish verify, so announce
newConnection(this);
char *decryptData = new char[2048];
int len;
#if HomeKitLog == 1
printf("Successfully Connect\n");
#endif
numberOfMsgRec = 0;
numberOfMsgSend = 0;
clearNotify();
pthread_mutex_init(&mutex, NULL);
connected = true;
do {
bzero(buffer, 4096);
len = read(subSocket, buffer, 4096);
pthread_mutex_lock(&mutex);
//FIXME make sure buffer len > (2 + msgLen + 16)??
if (len > 0) {
uint16_t msgLen = (uint8_t)buffer[1]*256+(uint8_t)*buffer;
chacha20_ctx chacha20; bzero(&chacha20, sizeof(chacha20));
#if HomeKitLog == 1
printf("send: %llx\n", numberOfMsgRec);
#endif
if (!is_big_endian()) numberOfMsgRec = bswap_64(numberOfMsgRec);
#if HomeKitLog == 1
printf("send: %llx\n", numberOfMsgRec);
#endif
chacha20_setup(&chacha20, (const uint8_t *)controllerToAccessoryKey, 32, (uint8_t *)&numberOfMsgRec);
if (!is_big_endian()) numberOfMsgRec = bswap_64(numberOfMsgRec);
numberOfMsgRec++;
printf("send: %llx\n", numberOfMsgRec);
char temp[64]; bzero(temp, 64); char temp2[64]; bzero(temp2, 64);
chacha20_encrypt(&chacha20, (const uint8_t*)temp, (uint8_t *)temp2, 64);
//Ploy1305 key
char verify[16]; bzero(verify, 16);
Poly1305_GenKey((const unsigned char *)temp2, (uint8_t *)buffer, msgLen, Type_Data_With_Length, verify);
bzero(decryptData, 2048);
chacha20_encrypt(&chacha20, (const uint8_t *)&buffer[2], (uint8_t *)decryptData, msgLen);
#if HomeKitReplyHeaderLog == 1
printf("Request: %s\nPacketLen: %d\n, MessageLen: %d\n", decryptData, len, strlen(decryptData));
#endif
if(len >= (2 + msgLen + 16)
&& memcmp((void *)verify, (void *)&buffer[2 + msgLen], 16) == 0) {
#if HomeKitLog == 1
printf("Verify successfully!\n");
#endif
}
else {
#if HomeKitLog == 1
printf("Passed-in data is no-verified!\n");
for (int i = 0; i < 16; i++)
printf("%ud ", verify[i]);
printf("\n");
for (int i = 0; i < 16; i++)
printf("%ud ", buffer[2 + msgLen+i]);
printf("\n");
unsigned long long numberOfMsgRec_ = numberOfMsgRec-1;
chacha20_setup(&chacha20, (const uint8_t *)controllerToAccessoryKey, 32, (uint8_t *)&numberOfMsgRec_);
chacha20_encrypt(&chacha20, (const uint8_t*)temp, (uint8_t *)temp2, 64);
Poly1305_GenKey((const unsigned char *)temp, (uint8_t *)buffer, msgLen, Type_Data_With_Length, verify);
for (int i = 0; i < 16; i++)
printf("%ud ", verify[i]);
printf("\n");
#endif
continue;
}
//Output return
char *resultData = 0; unsigned int resultLen = 0;
handleAccessory(decryptData, msgLen, &resultData, &resultLen, this);
//18 = 2(resultLen) + 16(poly1305 verify key)
char *reply = new char[resultLen+18];
reply[0] = resultLen%256;
reply[1] = (resultLen-(uint8_t)reply[0])/256;
if (!is_big_endian()) numberOfMsgSend = bswap_64(numberOfMsgSend);
chacha20_setup(&chacha20, (const uint8_t *)accessoryToControllerKey, 32, (uint8_t *)&numberOfMsgSend);
if (!is_big_endian()) numberOfMsgSend = bswap_64(numberOfMsgSend);
numberOfMsgSend++;
chacha20_encrypt(&chacha20, (const uint8_t*)temp, (uint8_t *)temp2, 64);
chacha20_encrypt(&chacha20, (const uint8_t*)resultData, (uint8_t*)&reply[2], resultLen);
Poly1305_GenKey((const unsigned char *)temp2, (uint8_t *)reply, resultLen, Type_Data_With_Length, verify);
memcpy((unsigned char*)&reply[resultLen+2], verify, 16);
write(subSocket, reply, resultLen+18);
pthread_mutex_unlock(&mutex);
delete [] reply;
delete [] resultData;
}
} while (len > 0);
if (deadConnection) deadConnection(this);
pthread_mutex_destroy(&mutex);
delete [] decryptData;
connected = false;