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diff --git a/comm/third_party/botan/src/lib/kdf/sp800_56c/sp800_56c.h b/comm/third_party/botan/src/lib/kdf/sp800_56c/sp800_56c.h
new file mode 100644
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+++ b/comm/third_party/botan/src/lib/kdf/sp800_56c/sp800_56c.h
@@ -0,0 +1,61 @@
+/*
+* KDF defined in NIST SP 800-56c
+* (C) 2016 Kai Michaelis
+*
+* Botan is released under the Simplified BSD License (see license.txt)
+*/
+
+#ifndef BOTAN_SP800_56C_H_
+#define BOTAN_SP800_56C_H_
+
+#include <botan/kdf.h>
+#include <botan/mac.h>
+
+BOTAN_FUTURE_INTERNAL_HEADER(sp800_56c.h)
+
+namespace Botan {
+
+/**
+ * NIST SP 800-56C KDF
+ */
+class BOTAN_PUBLIC_API(2,0) SP800_56C final : public KDF
+   {
+   public:
+      std::string name() const override { return "SP800-56C(" + m_prf->name() + ")"; }
+
+      KDF* clone() const override { return new SP800_56C(m_prf->clone(), m_exp->clone()); }
+
+      /**
+      * Derive a key using the SP800-56C KDF.
+      *
+      * The implementation hard codes the context value for the
+      * expansion step to the empty string.
+      *
+      * @param key derived keying material K_M
+      * @param key_len the desired output length in bytes
+      * @param secret shared secret Z
+      * @param secret_len size of Z in bytes
+      * @param salt salt s of the extraction step
+      * @param salt_len size of s in bytes
+      * @param label label for the expansion step
+      * @param label_len size of label in bytes
+      *
+      * @throws Invalid_Argument key_len > 2^32
+      */
+      size_t 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 override;
+
+      /**
+      * @param mac MAC algorithm used for randomness extraction
+      * @param exp KDF used for key expansion
+      */
+      SP800_56C(MessageAuthenticationCode* mac, KDF* exp) : m_prf(mac), m_exp(exp) {}
+   private:
+      std::unique_ptr<MessageAuthenticationCode> m_prf;
+      std::unique_ptr<KDF> m_exp;
+   };
+}
+
+#endif