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Use separate nettle aes context for encryption and decryption

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So it can be used and validated by different threads at the same time
This commit is contained in:
Benau 2018-09-18 14:25:55 +08:00
parent 0cd8c03bcd
commit 07ad8977dd
2 changed files with 18 additions and 16 deletions
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26
src/network/crypto_nettle.cpp
View File

@ -74,9 +74,9 @@ std::string Crypto::m_client_iv;
bool Crypto::encryptConnectionRequest(BareNetworkString& ns)
{
std::vector<uint8_t> cipher(ns.m_buffer.size() + 4, 0);
gcm_aes128_encrypt(&m_aes_context, ns.m_buffer.size(), cipher.data() + 4,
ns.m_buffer.data());
gcm_aes128_digest(&m_aes_context, 4, cipher.data());
gcm_aes128_encrypt(&m_aes_encrypt_context, ns.m_buffer.size(),
cipher.data() + 4, ns.m_buffer.data());
gcm_aes128_digest(&m_aes_encrypt_context, 4, cipher.data());
std::swap(ns.m_buffer, cipher);
return true;
} // encryptConnectionRequest
@ -88,9 +88,9 @@ bool Crypto::decryptConnectionRequest(BareNetworkString& ns)
uint8_t* tag = ns.m_buffer.data();
std::array<uint8_t, 4> tag_after = {};
gcm_aes128_decrypt(&m_aes_context, ns.m_buffer.size() - 4, pt.data(),
ns.m_buffer.data() + 4);
gcm_aes128_digest(&m_aes_context, 4, tag_after.data());
gcm_aes128_decrypt(&m_aes_decrypt_context, ns.m_buffer.size() - 4,
pt.data(), ns.m_buffer.data() + 4);
gcm_aes128_digest(&m_aes_decrypt_context, 4, tag_after.data());
handleAuthentication(tag, tag_after);
std::swap(ns.m_buffer, pt);
@ -119,10 +119,10 @@ ENetPacket* Crypto::encryptSend(BareNetworkString& ns, bool reliable)
uint8_t* packet_start = p->data + 8;
gcm_aes128_set_iv(&m_aes_context, 12, iv.data());
gcm_aes128_encrypt(&m_aes_context, ns.m_buffer.size(), packet_start,
ns.m_buffer.data());
gcm_aes128_digest(&m_aes_context, 4, p->data + 4);
gcm_aes128_set_iv(&m_aes_encrypt_context, 12, iv.data());
gcm_aes128_encrypt(&m_aes_encrypt_context, ns.m_buffer.size(),
packet_start, ns.m_buffer.data());
gcm_aes128_digest(&m_aes_encrypt_context, 4, p->data + 4);
ul.unlock();
memcpy(p->data, &val, 4);
@ -145,10 +145,10 @@ NetworkString* Crypto::decryptRecieve(ENetPacket* p)
uint8_t* tag = p->data + 4;
std::array<uint8_t, 4> tag_after = {};
gcm_aes128_set_iv(&m_aes_context, 12, iv.data());
gcm_aes128_decrypt(&m_aes_context, clen, ns->m_buffer.data(),
gcm_aes128_set_iv(&m_aes_decrypt_context, 12, iv.data());
gcm_aes128_decrypt(&m_aes_decrypt_context, clen, ns->m_buffer.data(),
packet_start);
gcm_aes128_digest(&m_aes_context, 4, tag_after.data());
gcm_aes128_digest(&m_aes_decrypt_context, 4, tag_after.data());
handleAuthentication(tag, tag_after);
NetworkString* result = ns.get();

8
src/network/crypto_nettle.hpp
View File

@ -50,7 +50,7 @@ private:
uint32_t m_packet_counter;
struct gcm_aes128_ctx m_aes_context;
struct gcm_aes128_ctx m_aes_encrypt_context, m_aes_decrypt_context;
std::mutex m_crypto_mutex;
@ -132,8 +132,10 @@ public:
assert(iv.size() == 12);
std::copy_n(iv.begin(), 12, m_iv.begin());
m_packet_counter = 0;
gcm_aes128_set_key(&m_aes_context, key.data());
gcm_aes128_set_iv(&m_aes_context, 12, iv.data());
gcm_aes128_set_key(&m_aes_encrypt_context, key.data());
gcm_aes128_set_iv(&m_aes_encrypt_context, 12, iv.data());
gcm_aes128_set_key(&m_aes_decrypt_context, key.data());
gcm_aes128_set_iv(&m_aes_decrypt_context, 12, iv.data());
}
// ------------------------------------------------------------------------
bool encryptConnectionRequest(BareNetworkString& ns);