1// Copyright 2007 Google Inc. All Rights Reserved.
2// Author: mschilder@google.com (Marius Schilder)
3
4#ifndef SECURITY_UTIL_LITE_HASH_INTERNAL_H__
5#define SECURITY_UTIL_LITE_HASH_INTERNAL_H__
6
7#include <stdint.h>
8
9#ifdef __cplusplus
10extern "C" {
11#endif  // __cplusplus
12
13struct HASH_CTX;  // forward decl
14
15typedef struct HASH_VTAB {
16  void (* const init)(struct HASH_CTX*);
17  void (* const update)(struct HASH_CTX*, const void*, int);
18  const uint8_t* (* const final)(struct HASH_CTX*);
19  const uint8_t* (* const hash)(const void*, int, uint8_t*);
20  int size;
21} HASH_VTAB;
22
23typedef struct HASH_CTX {
24  const HASH_VTAB * f;
25  uint64_t count;
26  uint8_t buf[64];
27  uint32_t state[8];  // upto SHA2
28} HASH_CTX;
29
30#define HASH_init(ctx) (ctx)->f->init(ctx)
31#define HASH_update(ctx, data, len) (ctx)->f->update(ctx, data, len)
32#define HASH_final(ctx) (ctx)->f->final(ctx)
33#define HASH_hash(data, len, digest) (ctx)->f->hash(data, len, digest)
34#define HASH_size(ctx) (ctx)->f->size
35
36#ifdef __cplusplus
37}
38#endif  // __cplusplus
39
40#endif  // SECURITY_UTIL_LITE_HASH_INTERNAL_H__
41