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diff --git a/src/plugins/wireguard/blake/blake2s.h b/src/plugins/wireguard/blake/blake2s.h
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+/*
+ * 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_blake2s_h__
+#define __included_crypto_blake2s_h__
+
+#include <vlib/vlib.h>
+
+#if defined(_MSC_VER)
+#define BLAKE2_PACKED(x) __pragma(pack(push, 1)) x __pragma(pack(pop))
+#else
+#define BLAKE2_PACKED(x) x __attribute__((packed))
+#endif
+
+enum blake2s_constant
+{
+ BLAKE2S_BLOCK_BYTES = 64,
+ BLAKE2S_OUT_BYTES = 32,
+ BLAKE2S_KEY_BYTES = 32,
+ BLAKE2S_HASH_SIZE = BLAKE2S_OUT_BYTES,
+ BLAKE2S_SALT_BYTES = 8,
+ BLAKE2S_PERSONAL_BYTES = 8
+};
+
+typedef struct blake2s_state
+{
+ uint32_t h[8];
+ uint32_t t[2];
+ uint32_t f[2];
+ uint8_t buf[BLAKE2S_BLOCK_BYTES];
+ size_t buflen;
+ size_t outlen;
+ uint8_t last_node;
+} blake2s_state_t;
+
+BLAKE2_PACKED (struct blake2s_param
+ {
+ uint8_t digest_length; /* 1 */
+ uint8_t key_length; /* 2 */
+ uint8_t fanout; /* 3 */
+ uint8_t depth; /* 4 */
+ uint32_t leaf_length; /* 8 */
+ uint32_t node_offset; /* 12 */
+ uint16_t xof_length; /* 14 */
+ uint8_t node_depth; /* 15 */
+ uint8_t inner_length; /* 16 */
+ /* uint8_t reserved[0]; */
+ uint8_t salt[BLAKE2S_SALT_BYTES]; /* 24 */
+ uint8_t personal[BLAKE2S_PERSONAL_BYTES]; /* 32 */
+ });
+
+typedef struct blake2s_param blake2s_param_t;
+
+/* Streaming API */
+int blake2s_init (blake2s_state_t * S, size_t outlen);
+int blake2s_init_key (blake2s_state_t * S, size_t outlen, const void *key,
+ size_t keylen);
+int blake2s_init_param (blake2s_state_t * S, const blake2s_param_t * P);
+int blake2s_update (blake2s_state_t * S, const void *in, size_t inlen);
+int blake2s_final (blake2s_state_t * S, void *out, size_t outlen);
+
+int blake2s (void *out, size_t outlen, const void *in, size_t inlen,
+ const void *key, size_t keylen);
+
+#endif /* __included_crypto_blake2s_h__ */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */