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/*
* BIRD Library -- BLAKE2 Hash Functions
*
* Based on the code from BLAKE2 reference source code package
*
* 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 : https://creativecommons.org/publicdomain/zero/1.0
* - OpenSSL license : https://www.openssl.org/source/license.html
* - Apache 2.0 : https://www.apache.org/licenses/LICENSE-2.0
*
* More information about the BLAKE2 hash function can be found at
* https://blake2.net/ web.
*/
#ifndef _BIRD_BLAKE2_H_
#define _BIRD_BLAKE2_H_
#include "nest/bird.h"
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,
};
#define BLAKE2S_SIZE 32 // BLAKE2S_OUTBYTES
#define BLAKE2S_BLOCK_SIZE 64 // BLAKE2S_BLOCKBYTES
#define BLAKE2S_256_SIZE 32
#define BLAKE2B_SIZE 64 // BLAKE2B_OUTBYTES
#define BLAKE2B_BLOCK_SIZE 128 // BLAKE2B_BLOCKBYTES
#define BLAKE2B_512_SIZE 64
struct blake2s_state
{
u32 h[8];
u32 t[2];
u32 f[2];
byte buf[BLAKE2S_BLOCK_SIZE];
uint buflen;
uint outlen;
u8 last_node;
};
struct blake2b_state
{
u64 h[8];
u64 t[2];
u64 f[2];
byte buf[BLAKE2B_BLOCK_SIZE];
uint buflen;
uint outlen;
u8 last_node;
};
struct blake2s_param
{
u8 digest_length; /* 1 */
u8 key_length; /* 2 */
u8 fanout; /* 3 */
u8 depth; /* 4 */
u32 leaf_length; /* 8 */
u32 node_offset; /* 12 */
u16 xof_length; /* 14 */
u8 node_depth; /* 15 */
u8 inner_length; /* 16 */
/* byte reserved[0]; */
byte salt[BLAKE2S_SALTBYTES]; /* 24 */
byte personal[BLAKE2S_PERSONALBYTES]; /* 32 */
} PACKED;
struct blake2b_param
{
u8 digest_length; /* 1 */
u8 key_length; /* 2 */
u8 fanout; /* 3 */
u8 depth; /* 4 */
u32 leaf_length; /* 8 */
u32 node_offset; /* 12 */
u32 xof_length; /* 16 */
u8 node_depth; /* 17 */
u8 inner_length; /* 18 */
byte reserved[14]; /* 32 */
byte salt[BLAKE2B_SALTBYTES]; /* 48 */
byte personal[BLAKE2B_PERSONALBYTES]; /* 64 */
} PACKED;
/* Streaming API */
int blake2s_init(struct blake2s_state *s, size_t outlen);
int blake2s_init_key(struct blake2s_state *s, size_t outlen, const void *key, size_t keylen);
int blake2s_init_param(struct blake2s_state *s, const struct blake2s_param *p);
int blake2s_update(struct blake2s_state *s, const void *in, size_t inlen);
int blake2s_final(struct blake2s_state *s, void *out, size_t outlen);
int blake2b_init(struct blake2b_state *s, size_t outlen);
int blake2b_init_key(struct blake2b_state *s, size_t outlen, const void *key, size_t keylen);
int blake2b_init_param(struct blake2b_state *s, const struct blake2b_param *p);
int blake2b_update(struct blake2b_state *s, const void *in, size_t inlen);
int blake2b_final(struct blake2b_state *s, void *out, size_t outlen);
/* Wrapper functions for MAC class */
struct mac_desc;
struct mac_context;
struct blake2s_context {
const struct mac_desc *type;
struct blake2s_state state;
byte buf[BLAKE2S_SIZE];
};
struct blake2b_context {
const struct mac_desc *type;
struct blake2b_state state;
byte buf[BLAKE2B_SIZE];
};
void blake2s_mac_init(struct mac_context *ctx, const byte *key, uint keylen);
void blake2s_mac_update(struct mac_context *ctx, const byte *data, uint datalen);
byte *blake2s_mac_final(struct mac_context *ctx);
void blake2b_mac_init(struct mac_context *ctx, const byte *key, uint keylen);
void blake2b_mac_update(struct mac_context *ctx, const byte *data, uint datalen);
byte *blake2b_mac_final(struct mac_context *ctx);
#endif /* _BIRD_BLAKE2_H_ */
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