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diff --git a/comm/third_party/botan/src/lib/kdf/sp800_108/sp800_108.h b/comm/third_party/botan/src/lib/kdf/sp800_108/sp800_108.h
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+++ b/comm/third_party/botan/src/lib/kdf/sp800_108/sp800_108.h
@@ -0,0 +1,135 @@
+/*
+* KDFs defined in NIST SP 800-108
+* (C) 2016 Kai Michaelis
+*
+* Botan is released under the Simplified BSD License (see license.txt)
+*/
+
+#ifndef BOTAN_SP800_108_H_
+#define BOTAN_SP800_108_H_
+
+#include <botan/kdf.h>
+#include <botan/mac.h>
+
+BOTAN_FUTURE_INTERNAL_HEADER(sp800_108.h)
+
+namespace Botan {
+
+/**
+ * NIST SP 800-108 KDF in Counter Mode (5.1)
+ */
+class BOTAN_PUBLIC_API(2,0) SP800_108_Counter final : public KDF
+   {
+   public:
+      std::string name() const override { return "SP800-108-Counter(" + m_prf->name() + ")"; }
+
+      KDF* clone() const override { return new SP800_108_Counter(m_prf->clone()); }
+
+      /**
+      * Derive a key using the SP800-108 KDF in Counter mode.
+      *
+      * The implementation hard codes the length of [L]_2
+      * and [i]_2 (the value r) to 32 bits.
+      *
+      * @param key resulting keying material
+      * @param key_len the desired output length in bytes
+      * @param secret K_I
+      * @param secret_len size of K_I in bytes
+      * @param salt Context
+      * @param salt_len size of Context in bytes
+      * @param label Label
+      * @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 to use
+      */
+      explicit SP800_108_Counter(MessageAuthenticationCode* mac) : m_prf(mac) {}
+   private:
+      std::unique_ptr<MessageAuthenticationCode> m_prf;
+   };
+
+/**
+ * NIST SP 800-108 KDF in Feedback Mode (5.2)
+ */
+class BOTAN_PUBLIC_API(2,0) SP800_108_Feedback final : public KDF
+   {
+   public:
+      std::string name() const override { return "SP800-108-Feedback(" + m_prf->name() + ")"; }
+
+      KDF* clone() const override { return new SP800_108_Feedback(m_prf->clone()); }
+
+      /**
+      * Derive a key using the SP800-108 KDF in Feedback mode.
+      *
+      * The implementation uses the optional counter i and hard
+      * codes the length of [L]_2 and [i]_2 (the value r) to 32 bits.
+      *
+      * @param key resulting keying material
+      * @param key_len the desired output length in bytes
+      * @param secret K_I
+      * @param secret_len size of K_I in bytes
+      * @param salt IV || Context
+      * @param salt_len size of Context plus IV in bytes
+      * @param label Label
+      * @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;
+
+      explicit SP800_108_Feedback(MessageAuthenticationCode* mac) : m_prf(mac) {}
+   private:
+      std::unique_ptr<MessageAuthenticationCode> m_prf;
+   };
+
+/**
+ * NIST SP 800-108 KDF in Double Pipeline Mode (5.3)
+ */
+class BOTAN_PUBLIC_API(2,0) SP800_108_Pipeline final : public KDF
+   {
+   public:
+      std::string name() const override { return "SP800-108-Pipeline(" + m_prf->name() + ")"; }
+
+      KDF* clone() const override { return new SP800_108_Pipeline(m_prf->clone()); }
+
+      /**
+      * Derive a key using the SP800-108 KDF in Double Pipeline mode.
+      *
+      * The implementation uses the optional counter i and hard
+      * codes the length of [L]_2 and [i]_2 (the value r) to 32 bits.
+      *
+      * @param key resulting keying material
+      * @param key_len the desired output length in bytes
+      * @param secret K_I
+      * @param secret_len size of K_I in bytes
+      * @param salt Context
+      * @param salt_len size of Context in bytes
+      * @param label Label
+      * @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;
+
+      explicit SP800_108_Pipeline(MessageAuthenticationCode* mac) : m_prf(mac) {}
+
+   private:
+      std::unique_ptr<MessageAuthenticationCode> m_prf;
+   };
+
+}
+
+#endif