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fixed bug with chacha20 encryption of short messages

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orignal 2018-12-03 13:36:17 -05:00
parent 8fc3a1f9c9
commit abc4f6c70b
2 changed files with 3 additions and 2 deletions
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3
libi2pd/ChaCha20.cpp
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@ -111,7 +111,8 @@ void Chacha20Encrypt (Chacha20State& state, uint8_t * buf, size_t sz)
buf[i] ^= state.block.data[state.offset + i];
buf += s;
sz -= s;
state.offset = 0;
state.offset += s;
if (state.offset >= chacha::blocksize) state.offset = 0;
}
for (size_t i = 0; i < sz; i += chacha::blocksize)
{

2
tests/test-aeadchacha20poly1305.cpp
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@ -53,7 +53,7 @@ int main ()
assert (memcmp (buf1, text, 114) == 0);
// test encryption of multiple buffers
memcpy (buf, text, 114);
std::vector<std::pair<uint8_t*, std::size_t> > bufs{ std::make_pair (buf, 50), std::make_pair (buf + 50, 50), std::make_pair (buf + 100, 14) };
std::vector<std::pair<uint8_t*, std::size_t> > bufs{ std::make_pair (buf, 20), std::make_pair (buf + 20, 10), std::make_pair (buf + 30, 70), std::make_pair (buf + 100, 14) };
i2p::crypto::AEADChaCha20Poly1305Encrypt (bufs, key, nonce, buf + 114);
i2p::crypto::AEADChaCha20Poly1305 (buf, 114, nullptr, 0, key, nonce, buf1, 114, false);
assert (memcmp (buf1, text, 114) == 0);