Mirrors/i2pd
2
0
Fork 0
mirror of https://github.com/PurpleI2P/i2pd.git synced 2025-04-28 03:37:49 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions

process AEAD/Chacha20/Poly1305 frame for data phase of NTCP2

Browse source
This commit is contained in:
orignal 2018-06-22 15:02:49 -04:00
parent 5884852612
commit 0aa618b938
3 changed files with 53 additions and 11 deletions
Download patch file Download diff file Expand all files Collapse all files

22
libi2pd/Crypto.cpp
View file

@ -1081,19 +1081,23 @@ namespace crypto
chacha20 (buf, msgLen, nonce, key, 1);
// create Poly1305 message
if (!ad) adLen = 0;
std::vector<uint8_t> polyMsg(adLen + msgLen + 3*16);
size_t offset = 0;
size_t offset = 0;
uint8_t padding[16]; memset (padding, 0, 16);
memcpy (polyMsg.data (), ad, adLen); offset += adLen; // additional authenticated data
auto rem = adLen & 0x0F; // %16
if (rem)
{
// padding1
rem = 16 - rem;
memcpy (polyMsg.data () + offset, padding, rem); offset += rem;
if (ad)
{
memcpy (polyMsg.data (), ad, adLen); offset += adLen; // additional authenticated data
auto rem = adLen & 0x0F; // %16
if (rem)
{
// padding1
rem = 16 - rem;
memcpy (polyMsg.data () + offset, padding, rem); offset += rem;
}
}
memcpy (polyMsg.data () + offset, encrypt ? buf : msg, msgLen); offset += msgLen; // encrypted data
rem = msgLen & 0x0F; // %16
auto rem = msgLen & 0x0F; // %16
if (rem)
{
// padding2