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use std::mt19937 instead rand()

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orignal 2024-06-07 22:10:52 -04:00
parent 2f847d62bb
commit 6a590bf970
3 changed files with 19 additions and 16 deletions
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10
libi2pd/SSU2Session.cpp
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@ -516,7 +516,7 @@ namespace transport
else
extraSize -= packet->payloadSize;
}
size_t offset = extraSize > 0 ? (rand () % extraSize) : 0;
size_t offset = extraSize > 0 ? (m_Server.GetRng ()() % extraSize) : 0;
if (offset + packet->payloadSize >= m_MaxPayloadSize) offset = 0;
auto size = CreateFirstFragmentBlock (packet->payload + packet->payloadSize, m_MaxPayloadSize - offset - packet->payloadSize, msg);
if (!size) return false;
@ -528,7 +528,7 @@ namespace transport
uint8_t fragmentNum = 0;
while (msg->offset < msg->len)
{
offset = extraSize > 0 ? (rand () % extraSize) : 0;
offset = extraSize > 0 ? (m_Server.GetRng ()() % extraSize) : 0;
packet = m_Server.GetSentPacketsPool ().AcquireShared ();
packet->payloadSize = CreateFollowOnFragmentBlock (packet->payload, m_MaxPayloadSize - offset, msg, fragmentNum, msgID);
extraSize -= offset;
@ -934,7 +934,7 @@ namespace transport
{
if (payloadSize > m_MaxPayloadSize - 48)
{
payloadSize = m_MaxPayloadSize - 48 - (rand () % 16);
payloadSize = m_MaxPayloadSize - 48 - (m_Server.GetRng ()() % 16);
if (m_SentHandshakePacket->payloadSize - payloadSize < 24)
payloadSize -= 24;
}
@ -2695,7 +2695,7 @@ namespace transport
size_t SSU2Session::CreatePaddingBlock (uint8_t * buf, size_t len, size_t minSize)
{
if (len < 3 || len < minSize) return 0;
size_t paddingSize = rand () & 0x0F; // 0 - 15
size_t paddingSize = m_Server.GetRng ()() & 0x0F; // 0 - 15
if (paddingSize + 3 > len) paddingSize = len - 3;
else if (paddingSize + 3 < minSize) paddingSize = minSize - 3;
buf[0] = eSSU2BlkPadding;
@ -2981,7 +2981,7 @@ namespace transport
{
uint8_t payload[SSU2_MAX_PACKET_SIZE];
payload[0] = eSSU2BlkPathChallenge;
size_t len = rand () % (m_MaxPayloadSize - 3);
size_t len = m_Server.GetRng ()() % (m_MaxPayloadSize - 3);
htobe16buf (payload + 1, len);
if (len > 0)
{