const char* encrypt(const char* unhexed, const char* key) {
int size = strlen(unhexed);
int spaces = 0;
if (size % 16) {
spaces = 16 - (size % 16);
}
size += spaces;
char* buffer = new char[size+1];
// TODO: memory check
// Add spaces to the end to make size divisible by block size
for (; spaces > 0; spaces--) {
buffer[size-spaces] = ' ';
}
// Create reader
CRijndael reader;
reader.MakeKey(key, CRijndael::sm_chain0, 16, 16);
reader.Encrypt(unhexed, buffer, size, CRijndael::CFB);
// Convert to hex
char* result = new char[size*2+1];
CharStr2HexStr((unsigned char*)buffer, result, size);
delete [] buffer;
return result;
}
int ejoy_decrypt_auth_token(const char* token, unsigned int token_sz, const char* svr_pass,
unsigned int svr_pass_sz, const char* svr_sig, unsigned int svr_sig_sz, struct ejoy_token* t)
{
if (token_sz != 160)
{
//token长度无效
return 1;
}
char ts[128];
memcpy(ts, token, 128);
char tss[16];
fromhex(token+128, tss, 16);
MD5_CTX md5;
MD5Init(&md5);
char decrypt[16];
MD5Update(&md5, (unsigned char*)ts, 128);
MD5Update(&md5, (unsigned char*)svr_sig, svr_sig_sz);
MD5Final(&md5, (unsigned char*)decrypt);
for (int i = 0; i < 16; i++)
{
if (tss[i] != decrypt[i])
{
//token验证失败
return 1;
}
}
char tsss[64];
fromhex(token, tsss, 64);
CRijndael oRijndael;
oRijndael.MakeKey((char*)svr_pass, NULL, svr_pass_sz, svr_pass_sz);
char ret[64];
oRijndael.Decrypt(tsss, ret, 64, CRijndael::ECB);
char temp[3][64] = {0};
int index = 0;
int pos = 0;
for (int i = 0; i < 64; i++)
{
if (ret[i] == '\n')
{
index++;
pos = 0;
}
else
{
temp[index][pos++] = ret[i];
}
}
//token验证成功
memcpy(t->uid, temp[0], sizeof(t->uid));
t->timestamp = atol(temp[1]);
t->randomkey = atol(temp[2]);
return 0;
}
long Decrypt_data(PBYTE tsBufOut, PBYTE tsBufIn, void* g_OddCW, void* g_EvenCW)
{
CRijndael aes;
//仅有调整字段
if(0x20 == (tsBufIn[3] & 0x30))
return -1;
//载荷前面有调整字段
WORD wAdaptionLen = 0;
if(0x30 == (tsBufIn[3] & 0x30))
{
wAdaptionLen = tsBufIn[4];
}
int DataLen = (188 - 5 - wAdaptionLen) / 16 * 16;
switch(tsBufIn[3] & 0xc0)
{
//加扰的包才需要解扰
case 0xc0: //c0用odd key
memcpy(tsBufOut, tsBufIn, 188);
aes.MakeKey((char*)g_OddCW, (char*)g_OddCW, 16, 16);
aes.Decrypt((char*)(&tsBufIn[0]+4+wAdaptionLen), (char*)&tsBufOut[0]+4+wAdaptionLen, DataLen);
break;
case 0x80: //80用even key
memcpy(tsBufOut, tsBufIn, 188);
aes.MakeKey((char*)g_EvenCW, (char*)g_EvenCW, 16, 16);
aes.Decrypt((char*)(&tsBufIn[0]+4+wAdaptionLen), (char*)&tsBufOut[0]+4+wAdaptionLen, DataLen);
break;
default:
break;
}
return 0;
}
bool CStdCrypt::getKey(BYTE *pKey, size_t cbKeyLen)
{
if (!m_valid || cbKeyLen < sizeof(ExternalKey))
return false;
ExternalKey tmp = { 0 };
memcpy(&tmp.m_key, m_key, KEY_LENGTH);
tmp.m_crc32 = crc32(0xAbbaDead, (LPCBYTE)m_password.GetString(), m_password.GetLength());
getRandomBytes(tmp.slack, sizeof(tmp.slack));
BYTE tmpHash[32];
slow_hash(m_password, m_password.GetLength(), tmpHash);
CRijndael tmpAes;
tmpAes.MakeKey(tmpHash, tmpAes.sm_chain0, KEY_LENGTH, BLOCK_SIZE);
tmpAes.Encrypt(&tmp, pKey, sizeof(tmp));
return true;
}
SAFEARRAY* Functions::LoadDecryptResource(LPCWSTR resource)
{
CRijndael oRijndael;
char* outBuf;
oRijndael.MakeKey(string(IntNet::akey1 + IntNet::akey2 + CLR::akey3 + CLR::akey4).c_str(), "", 32, 16);
outBuf = oRijndael.Decrypt((const char*) LockResource(LoadResource(NULL, FindResource(NULL, resource, L"NT"))), SizeofResource(NULL, FindResource(NULL, resource, L"NT")));
SAFEARRAYBOUND bounds;
bounds.cElements = SizeofResource(NULL, FindResource(NULL, resource, L"NT")); // # of indexes
bounds.lLbound = 0;
SAFEARRAY* psaz = SafeArrayCreate(VT_UI1, 1, &bounds);
BYTE* real_array = (BYTE*)psaz->pvData;
memcpy(real_array, outBuf, SizeofResource(NULL, FindResource(NULL, resource, L"NT")));
free(outBuf);
return psaz;
}
const char* decrypt(const char* hexed, const char* key) {
int size = strlen(hexed) / 2;
if (size % 16 != 0) {
fl_alert("Encrypted file is corrupt.");
throw false;
}
char* buffer = new char[size+1];
HexStr2CharStr(hexed, (unsigned char*)buffer, size);
CRijndael reader;
reader.MakeKey(key, CRijndael::sm_chain0, 16, 16);
char* buffer2 = new char[size+1];
buffer2[size] = 0;
if (!buffer2) {
fl_alert("Not enough memory to load shader source code.");
throw false;
}
reader.Decrypt(buffer, buffer2, size, CRijndael::CFB);
return buffer2;
}
bool CStdCrypt::setKey(const BYTE *pKey, size_t cbKeyLen)
{
// full external key. decode & check password
if (cbKeyLen != sizeof(ExternalKey))
return false;
BYTE tmpHash[32];
slow_hash(m_password, m_password.GetLength(), tmpHash);
CRijndael tmpAes;
tmpAes.MakeKey(tmpHash, tmpAes.sm_chain0, KEY_LENGTH, BLOCK_SIZE);
ExternalKey tmp = { 0 };
tmpAes.Decrypt(pKey, &tmp, sizeof(tmp));
if (tmp.m_crc32 != crc32(0xAbbaDead, (LPCBYTE)m_password.GetString(), m_password.GetLength()))
return false;
memcpy(m_key, &tmp.m_key, KEY_LENGTH);
m_aes.MakeKey(m_key, "Miranda", KEY_LENGTH, BLOCK_SIZE);
return m_valid = true;
}
