1 files changed, 51 insertions, 0 deletions
diff --git a/comm/third_party/botan/src/lib/pubkey/cecpq1/cecpq1.cpp b/comm/third_party/botan/src/lib/pubkey/cecpq1/cecpq1.cpp
new file mode 100644
index 0000000000..e11a1e0839
--- /dev/null
+++ b/comm/third_party/botan/src/lib/pubkey/cecpq1/cecpq1.cpp
@@ -0,0 +1,51 @@
+/*
+* CECPQ1 (x25519 + NewHope)
+* (C) 2016 Jack Lloyd
+*
+* Botan is released under the Simplified BSD License (see license.txt)
+*/
+
+#include <botan/cecpq1.h>
+#include <botan/newhope.h>
+#include <botan/curve25519.h>
+#include <botan/rng.h>
+
+namespace Botan {
+
+void CECPQ1_offer(uint8_t send[CECPQ1_OFFER_BYTES],
+                  CECPQ1_key* offer_key_output,
+                  RandomNumberGenerator& rng)
+   {
+   offer_key_output->m_x25519 = rng.random_vec(32);
+   curve25519_basepoint(send, offer_key_output->m_x25519.data());
+
+   newhope_keygen(send + 32, &offer_key_output->m_newhope,
+                  rng, Newhope_Mode::BoringSSL);
+   }
+
+void CECPQ1_accept(uint8_t shared_key[CECPQ1_SHARED_KEY_BYTES],
+                   uint8_t send[CECPQ1_ACCEPT_BYTES],
+                   const uint8_t received[CECPQ1_OFFER_BYTES],
+                   RandomNumberGenerator& rng)
+   {
+   secure_vector<uint8_t> x25519_key = rng.random_vec(32);
+
+   curve25519_basepoint(send, x25519_key.data());
+
+   curve25519_donna(shared_key, x25519_key.data(), received);
+
+   newhope_sharedb(shared_key + 32, send + 32, received + 32,
+                   rng, Newhope_Mode::BoringSSL);
+   }
+
+void CECPQ1_finish(uint8_t shared_key[CECPQ1_SHARED_KEY_BYTES],
+                   const CECPQ1_key& offer_key,
+                   const uint8_t received[CECPQ1_ACCEPT_BYTES])
+   {
+   curve25519_donna(shared_key, offer_key.m_x25519.data(), received);
+
+   newhope_shareda(shared_key + 32, &offer_key.m_newhope, received + 32,
+                   Newhope_Mode::BoringSSL);
+   }
+
+}