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diff --git a/src/plugins/wireguard/blake/blake2-impl.h b/src/plugins/wireguard/blake/blake2-impl.h
new file mode 100755
index 00000000000..ad60b4a5775
--- /dev/null
+++ b/src/plugins/wireguard/blake/blake2-impl.h
@@ -0,0 +1,187 @@
+/*
+ * Copyright (c) 2020 Doc.ai and/or its affiliates.
+ * Copyright (c) 2012 Samuel Neves <sneves@dei.uc.pt>.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/*
+   More information about the BLAKE2 hash function can be found at
+   https://blake2.net.
+*/
+#ifndef __included_crypto_blake2_impl_h__
+#define __included_crypto_blake2_impl_h__
+
+#include <stdint.h>
+#include <string.h>
+#include <vppinfra/byte_order.h>
+
+#if defined(CLIB_ARCH_IS_LITTLE_ENDIAN)
+#define NATIVE_LITTLE_ENDIAN
+#endif
+
+#if !defined(__cplusplus) && (!defined(__STDC_VERSION__) || __STDC_VERSION__ < 199901L)
+#if   defined(_MSC_VER)
+#define BLAKE2_INLINE __inline
+#elif defined(__GNUC__)
+#define BLAKE2_INLINE __inline__
+#else
+#define BLAKE2_INLINE
+#endif
+#else
+#define BLAKE2_INLINE inline
+#endif
+
+static BLAKE2_INLINE uint32_t
+load32 (const void *src)
+{
+#if defined(NATIVE_LITTLE_ENDIAN)
+  uint32_t w;
+  memcpy (&w, src, sizeof w);
+  return w;
+#else
+  const uint8_t *p = (const uint8_t *) src;
+  return ((uint32_t) (p[0]) << 0) |
+    ((uint32_t) (p[1]) << 8) |
+    ((uint32_t) (p[2]) << 16) | ((uint32_t) (p[3]) << 24);
+#endif
+}
+
+static BLAKE2_INLINE uint64_t
+load64 (const void *src)
+{
+#if defined(NATIVE_LITTLE_ENDIAN)
+  uint64_t w;
+  memcpy (&w, src, sizeof w);
+  return w;
+#else
+  const uint8_t *p = (const uint8_t *) src;
+  return ((uint64_t) (p[0]) << 0) |
+    ((uint64_t) (p[1]) << 8) |
+    ((uint64_t) (p[2]) << 16) |
+    ((uint64_t) (p[3]) << 24) |
+    ((uint64_t) (p[4]) << 32) |
+    ((uint64_t) (p[5]) << 40) |
+    ((uint64_t) (p[6]) << 48) | ((uint64_t) (p[7]) << 56);
+#endif
+}
+
+static BLAKE2_INLINE uint16_t
+load16 (const void *src)
+{
+#if defined(NATIVE_LITTLE_ENDIAN)
+  uint16_t w;
+  memcpy (&w, src, sizeof w);
+  return w;
+#else
+  const uint8_t *p = (const uint8_t *) src;
+  return (uint16_t) (((uint32_t) (p[0]) << 0) | ((uint32_t) (p[1]) << 8));
+#endif
+}
+
+static BLAKE2_INLINE void
+store16 (void *dst, uint16_t w)
+{
+#if defined(NATIVE_LITTLE_ENDIAN)
+  memcpy (dst, &w, sizeof w);
+#else
+  uint8_t *p = (uint8_t *) dst;
+  *p++ = (uint8_t) w;
+  w >>= 8;
+  *p++ = (uint8_t) w;
+#endif
+}
+
+static BLAKE2_INLINE void
+store32 (void *dst, uint32_t w)
+{
+#if defined(NATIVE_LITTLE_ENDIAN)
+  memcpy (dst, &w, sizeof w);
+#else
+  uint8_t *p = (uint8_t *) dst;
+  p[0] = (uint8_t) (w >> 0);
+  p[1] = (uint8_t) (w >> 8);
+  p[2] = (uint8_t) (w >> 16);
+  p[3] = (uint8_t) (w >> 24);
+#endif
+}
+
+static BLAKE2_INLINE void
+store64 (void *dst, uint64_t w)
+{
+#if defined(NATIVE_LITTLE_ENDIAN)
+  memcpy (dst, &w, sizeof w);
+#else
+  uint8_t *p = (uint8_t *) dst;
+  p[0] = (uint8_t) (w >> 0);
+  p[1] = (uint8_t) (w >> 8);
+  p[2] = (uint8_t) (w >> 16);
+  p[3] = (uint8_t) (w >> 24);
+  p[4] = (uint8_t) (w >> 32);
+  p[5] = (uint8_t) (w >> 40);
+  p[6] = (uint8_t) (w >> 48);
+  p[7] = (uint8_t) (w >> 56);
+#endif
+}
+
+static BLAKE2_INLINE uint64_t
+load48 (const void *src)
+{
+  const uint8_t *p = (const uint8_t *) src;
+  return ((uint64_t) (p[0]) << 0) |
+    ((uint64_t) (p[1]) << 8) |
+    ((uint64_t) (p[2]) << 16) |
+    ((uint64_t) (p[3]) << 24) |
+    ((uint64_t) (p[4]) << 32) | ((uint64_t) (p[5]) << 40);
+}
+
+static BLAKE2_INLINE void
+store48 (void *dst, uint64_t w)
+{
+  uint8_t *p = (uint8_t *) dst;
+  p[0] = (uint8_t) (w >> 0);
+  p[1] = (uint8_t) (w >> 8);
+  p[2] = (uint8_t) (w >> 16);
+  p[3] = (uint8_t) (w >> 24);
+  p[4] = (uint8_t) (w >> 32);
+  p[5] = (uint8_t) (w >> 40);
+}
+
+static BLAKE2_INLINE uint32_t
+rotr32 (const uint32_t w, const unsigned c)
+{
+  return (w >> c) | (w << (32 - c));
+}
+
+static BLAKE2_INLINE uint64_t
+rotr64 (const uint64_t w, const unsigned c)
+{
+  return (w >> c) | (w << (64 - c));
+}
+
+/* prevents compiler optimizing out memset() */
+static BLAKE2_INLINE void
+secure_zero_memory (void *v, size_t n)
+{
+  static void *(*const volatile memset_v) (void *, int, size_t) = &memset;
+  memset_v (v, 0, n);
+}
+
+#endif //__included_crypto_blake2_impl_h__
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */