void GenWzKey(const uint8_t* IV, uint8_t* key) {
uint8_t BigIV[16];
for (int i = 0; i < 16; i += 4) {
memcpy(BigIV+i, IV, 4);
}
AESGen.SetParameters(256, 128);
AESGen.StartEncryption(AESKey2);
AESGen.EncryptBlock(BigIV, key);
for (int i = 16; i < 0x10000; i += 16) {
AESGen.EncryptBlock(key+i-16, key+i);
}
}
void Crypto::TransformData(uint8_t* IV, uint8_t* data, uint32_t len) {
uint8_t BigIV[16];
for (int i = 0; i < 16; i += 4) {
memcpy(BigIV+i, IV, 4);
}
uint32_t pos = 0;
uint8_t first = 1;
int32_t tpos = 0;
while (len > pos) {
AESGen.SetParameters(256, 128);
AESGen.StartEncryption(AESKey2);
tpos = 1460 - first * 4;
if (len > pos + tpos) {
AESGen.TransformOFB(data + pos, BigIV, tpos);
}
else {
AESGen.TransformOFB(data + pos, BigIV, len - pos);
}
pos += tpos;
if (first) first = 0;
}
}