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diff --git a/libarchive/archive_blake2.h b/libarchive/archive_blake2.h
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+/*
+ BLAKE2 reference source code package - reference C implementations
+
+ Copyright 2012, Samuel Neves <sneves@dei.uc.pt>. You may use this under the
+ terms of the CC0, the OpenSSL Licence, or the Apache Public License 2.0, at
+ your option. The terms of these licenses can be found at:
+
+ - CC0 1.0 Universal : http://creativecommons.org/publicdomain/zero/1.0
+ - OpenSSL license : https://www.openssl.org/source/license.html
+ - Apache 2.0 : http://www.apache.org/licenses/LICENSE-2.0
+
+ More information about the BLAKE2 hash function can be found at
+ https://blake2.net.
+*/
+#ifndef BLAKE2_H
+#define BLAKE2_H
+
+#include <stddef.h>
+#include <stdint.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
+
+#if defined(__cplusplus)
+extern "C" {
+#endif
+
+ enum blake2s_constant
+ {
+ BLAKE2S_BLOCKBYTES = 64,
+ BLAKE2S_OUTBYTES = 32,
+ BLAKE2S_KEYBYTES = 32,
+ BLAKE2S_SALTBYTES = 8,
+ BLAKE2S_PERSONALBYTES = 8
+ };
+
+ enum blake2b_constant
+ {
+ BLAKE2B_BLOCKBYTES = 128,
+ BLAKE2B_OUTBYTES = 64,
+ BLAKE2B_KEYBYTES = 64,
+ BLAKE2B_SALTBYTES = 16,
+ BLAKE2B_PERSONALBYTES = 16
+ };
+
+ typedef struct blake2s_state__
+ {
+ uint32_t h[8];
+ uint32_t t[2];
+ uint32_t f[2];
+ uint8_t buf[BLAKE2S_BLOCKBYTES];
+ size_t buflen;
+ size_t outlen;
+ uint8_t last_node;
+ } blake2s_state;
+
+ typedef struct blake2b_state__
+ {
+ uint64_t h[8];
+ uint64_t t[2];
+ uint64_t f[2];
+ uint8_t buf[BLAKE2B_BLOCKBYTES];
+ size_t buflen;
+ size_t outlen;
+ uint8_t last_node;
+ } blake2b_state;
+
+ typedef struct blake2sp_state__
+ {
+ blake2s_state S[8][1];
+ blake2s_state R[1];
+ uint8_t buf[8 * BLAKE2S_BLOCKBYTES];
+ size_t buflen;
+ size_t outlen;
+ } blake2sp_state;
+
+ typedef struct blake2bp_state__
+ {
+ blake2b_state S[4][1];
+ blake2b_state R[1];
+ uint8_t buf[4 * BLAKE2B_BLOCKBYTES];
+ size_t buflen;
+ size_t outlen;
+ } blake2bp_state;
+
+ 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_SALTBYTES]; /* 24 */
+ uint8_t personal[BLAKE2S_PERSONALBYTES]; /* 32 */
+ });
+
+ typedef struct blake2s_param__ blake2s_param;
+
+ BLAKE2_PACKED(struct blake2b_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 */
+ uint32_t xof_length; /* 16 */
+ uint8_t node_depth; /* 17 */
+ uint8_t inner_length; /* 18 */
+ uint8_t reserved[14]; /* 32 */
+ uint8_t salt[BLAKE2B_SALTBYTES]; /* 48 */
+ uint8_t personal[BLAKE2B_PERSONALBYTES]; /* 64 */
+ });
+
+ typedef struct blake2b_param__ blake2b_param;
+
+ typedef struct blake2xs_state__
+ {
+ blake2s_state S[1];
+ blake2s_param P[1];
+ } blake2xs_state;
+
+ typedef struct blake2xb_state__
+ {
+ blake2b_state S[1];
+ blake2b_param P[1];
+ } blake2xb_state;
+
+ /* Padded structs result in a compile-time error */
+ enum {
+ BLAKE2_DUMMY_1 = 1/(sizeof(blake2s_param) == BLAKE2S_OUTBYTES),
+ BLAKE2_DUMMY_2 = 1/(sizeof(blake2b_param) == BLAKE2B_OUTBYTES)
+ };
+
+ /* Streaming API */
+ int blake2s_init( blake2s_state *S, size_t outlen );
+ int blake2s_init_key( blake2s_state *S, size_t outlen, const void *key, size_t keylen );
+ int blake2s_init_param( blake2s_state *S, const blake2s_param *P );
+ int blake2s_update( blake2s_state *S, const void *in, size_t inlen );
+ int blake2s_final( blake2s_state *S, void *out, size_t outlen );
+
+ int blake2b_init( blake2b_state *S, size_t outlen );
+ int blake2b_init_key( blake2b_state *S, size_t outlen, const void *key, size_t keylen );
+ int blake2b_init_param( blake2b_state *S, const blake2b_param *P );
+ int blake2b_update( blake2b_state *S, const void *in, size_t inlen );
+ int blake2b_final( blake2b_state *S, void *out, size_t outlen );
+
+ int blake2sp_init( blake2sp_state *S, size_t outlen );
+ int blake2sp_init_key( blake2sp_state *S, size_t outlen, const void *key, size_t keylen );
+ int blake2sp_update( blake2sp_state *S, const void *in, size_t inlen );
+ int blake2sp_final( blake2sp_state *S, void *out, size_t outlen );
+
+ int blake2bp_init( blake2bp_state *S, size_t outlen );
+ int blake2bp_init_key( blake2bp_state *S, size_t outlen, const void *key, size_t keylen );
+ int blake2bp_update( blake2bp_state *S, const void *in, size_t inlen );
+ int blake2bp_final( blake2bp_state *S, void *out, size_t outlen );
+
+ /* Variable output length API */
+ int blake2xs_init( blake2xs_state *S, const size_t outlen );
+ int blake2xs_init_key( blake2xs_state *S, const size_t outlen, const void *key, size_t keylen );
+ int blake2xs_update( blake2xs_state *S, const void *in, size_t inlen );
+ int blake2xs_final(blake2xs_state *S, void *out, size_t outlen);
+
+ int blake2xb_init( blake2xb_state *S, const size_t outlen );
+ int blake2xb_init_key( blake2xb_state *S, const size_t outlen, const void *key, size_t keylen );
+ int blake2xb_update( blake2xb_state *S, const void *in, size_t inlen );
+ int blake2xb_final(blake2xb_state *S, void *out, size_t outlen);
+
+ /* Simple API */
+ int blake2s( void *out, size_t outlen, const void *in, size_t inlen, const void *key, size_t keylen );
+ int blake2b( void *out, size_t outlen, const void *in, size_t inlen, const void *key, size_t keylen );
+
+ int blake2sp( void *out, size_t outlen, const void *in, size_t inlen, const void *key, size_t keylen );
+ int blake2bp( void *out, size_t outlen, const void *in, size_t inlen, const void *key, size_t keylen );
+
+ int blake2xs( void *out, size_t outlen, const void *in, size_t inlen, const void *key, size_t keylen );
+ int blake2xb( void *out, size_t outlen, const void *in, size_t inlen, const void *key, size_t keylen );
+
+ /* This is simply an alias for blake2b */
+ int blake2( void *out, size_t outlen, const void *in, size_t inlen, const void *key, size_t keylen );
+
+#if defined(__cplusplus)
+}
+#endif
+
+#endif