1 files changed, 28 insertions, 0 deletions
diff --git a/comm/third_party/botan/src/lib/kdf/sp800_56c/sp800_56c.cpp b/comm/third_party/botan/src/lib/kdf/sp800_56c/sp800_56c.cpp
new file mode 100644
index 0000000000..c0a1a1f689
--- /dev/null
+++ b/comm/third_party/botan/src/lib/kdf/sp800_56c/sp800_56c.cpp
@@ -0,0 +1,28 @@
+/*
+* KDF defined in NIST SP 800-56c
+* (C) 2016 Kai Michaelis
+*
+* Botan is released under the Simplified BSD License (see license.txt)
+*/
+
+#include <botan/sp800_56c.h>
+
+namespace Botan {
+
+size_t SP800_56C::kdf(uint8_t key[], size_t key_len,
+                      const uint8_t secret[], size_t secret_len,
+                      const uint8_t salt[], size_t salt_len,
+                      const uint8_t label[], size_t label_len) const
+   {
+   // Randomness Extraction
+   secure_vector<uint8_t> k_dk;
+
+   m_prf->set_key(salt, salt_len);
+   m_prf->update(secret, secret_len);
+   m_prf->final(k_dk);
+
+   // Key Expansion
+   return m_exp->kdf(key, key_len, k_dk.data(), k_dk.size(), nullptr, 0, label, label_len);
+   }
+
+}