1/* SPDX-License-Identifier: CC0-1.0 */ 2/* 3 BLAKE2 reference source code package - reference C implementations 4 5 Copyright 2012, Samuel Neves <sneves@dei.uc.pt>. You may use this under the 6 terms of the CC0, the OpenSSL Licence, or the Apache Public License 2.0, at 7 your option. The terms of these licenses can be found at: 8 9 - CC0 1.0 Universal : http://creativecommons.org/publicdomain/zero/1.0 10 - OpenSSL license : https://www.openssl.org/source/license.html 11 - Apache 2.0 : http://www.apache.org/licenses/LICENSE-2.0 12 13 More information about the BLAKE2 hash function can be found at 14 https://blake2.net. 15*/ 16 17/* 18 * Cross-ported from BLAKE2 (https://github.com/BLAKE2/BLAKE2). 19 * Modifications includes: 20 * 21 * - Remove unsupported compilers like MSC/CPP 22 * - Remove blake2s/blake2sp/blake2bp 23 * This blake2 implementation is mostly for btrfs, which only utilizes 24 * blake2b. 25 */ 26#ifndef BLAKE2_H 27#define BLAKE2_H 28 29#include <stddef.h> 30#include <stdint.h> 31 32#if defined(_MSC_VER) 33#define BLAKE2_PACKED(x) __pragma(pack(push, 1)) x __pragma(pack(pop)) 34#else 35#define BLAKE2_PACKED(x) x __attribute__((packed)) 36#endif 37 38 enum blake2b_constant 39 { 40 BLAKE2B_BLOCKBYTES = 128, 41 BLAKE2B_OUTBYTES = 64, 42 BLAKE2B_KEYBYTES = 64, 43 BLAKE2B_SALTBYTES = 16, 44 BLAKE2B_PERSONALBYTES = 16 45 }; 46 47 typedef struct blake2b_state__ 48 { 49 uint64_t h[8]; 50 uint64_t t[2]; 51 uint64_t f[2]; 52 uint8_t buf[BLAKE2B_BLOCKBYTES]; 53 size_t buflen; 54 size_t outlen; 55 uint8_t last_node; 56 } blake2b_state; 57 58 BLAKE2_PACKED(struct blake2b_param__ 59 { 60 uint8_t digest_length; /* 1 */ 61 uint8_t key_length; /* 2 */ 62 uint8_t fanout; /* 3 */ 63 uint8_t depth; /* 4 */ 64 uint32_t leaf_length; /* 8 */ 65 uint32_t node_offset; /* 12 */ 66 uint32_t xof_length; /* 16 */ 67 uint8_t node_depth; /* 17 */ 68 uint8_t inner_length; /* 18 */ 69 uint8_t reserved[14]; /* 32 */ 70 uint8_t salt[BLAKE2B_SALTBYTES]; /* 48 */ 71 uint8_t personal[BLAKE2B_PERSONALBYTES]; /* 64 */ 72 }); 73 74 typedef struct blake2b_param__ blake2b_param; 75 76 /* Padded structs result in a compile-time error */ 77 enum { 78 BLAKE2_DUMMY_2 = 1/(int)(sizeof(blake2b_param) == BLAKE2B_OUTBYTES) 79 }; 80 81 /* Streaming API */ 82 int blake2b_init( blake2b_state *S, size_t outlen ); 83 int blake2b_init_key( blake2b_state *S, size_t outlen, const void *key, size_t keylen ); 84 int blake2b_init_param( blake2b_state *S, const blake2b_param *P ); 85 int blake2b_update( blake2b_state *S, const void *in, size_t inlen ); 86 int blake2b_final( blake2b_state *S, void *out, size_t outlen ); 87 88 /* Simple API */ 89 int blake2b( void *out, size_t outlen, const void *in, size_t inlen, const void *key, size_t keylen ); 90 91 /* This is simply an alias for blake2b */ 92 int blake2( void *out, size_t outlen, const void *in, size_t inlen, const void *key, size_t keylen ); 93 94#endif 95