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update obfus array again

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Dario 2019-10-15 16:45:15 +02:00
parent d56e429175
commit 69f0ce3620
1 changed files with 11 additions and 2 deletions
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13
src/cpp/Crypto/Obfus_array.cpp
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@ -9,16 +9,25 @@ ObfusArray::ObfusArray(size_t size, const unsigned char * data)
{
m_arraySize = size + 2 + randombytes_random() % (int)roundf(size*0.25f);
m_Data = (unsigned char*)malloc(m_arraySize);
m_offsetSize = randombytes_random() % (int)roundf((m_arraySize - m_dataSize) * 0.8f);
printf("[ObfusArray::ObfusArray] array_size: %d, start by: %l, size: %ul, offset: %ul\n",
m_arraySize, m_Data, size, m_offsetSize);
assert(m_arraySize - m_offsetSize >= size);
uint32_t* d = (uint32_t*)m_Data;
size_t dMax = (size_t)floorf(m_arraySize / 4.0f);
for (size_t i = 0; i < (size_t)floorf(m_arraySize / 4.0f); i++) {
printf("d start by: %l, dMax: %ul", d, dMax);
for (size_t i = 0; i < dMax; i++) {
d[i] = randombytes_random();
}
d[m_arraySize - 4] = randombytes_random();
for (size_t i = m_arraySize - 4; i < m_arraySize; i++) {
m_Data[i] = (unsigned char)randombytes_random();
}
//d[m_arraySize - 4] = randombytes_random();
memcpy(&m_Data[m_offsetSize], data, size);
printf("[ObfusArray] data: %lld\n", (int64_t)m_Data);