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// Copyright 2007 Google Inc. All Rights Reserved.
// Author: mschilder@google.com (Marius Schilder)
#ifndef SECURITY_UTIL_LITE_HASH_INTERNAL_H__
#define SECURITY_UTIL_LITE_HASH_INTERNAL_H__
#include <stdint.h>
#ifdef __cplusplus
extern "C" {
#endif // __cplusplus
struct HASH_CTX; // forward decl
typedef struct HASH_VTAB {
void (* const init)(struct HASH_CTX*);
void (* const update)(struct HASH_CTX*, const void*, int);
const uint8_t* (* const final)(struct HASH_CTX*);
const uint8_t* (* const hash)(const void*, int, uint8_t*);
int size;
} HASH_VTAB;
typedef struct HASH_CTX {
const HASH_VTAB * f;
uint64_t count;
uint8_t buf[64];
uint32_t state[8]; // upto SHA2
} HASH_CTX;
#define HASH_init(ctx) (ctx)->f->init(ctx)
#define HASH_update(ctx, data, len) (ctx)->f->update(ctx, data, len)
#define HASH_final(ctx) (ctx)->f->final(ctx)
#define HASH_hash(data, len, digest) (ctx)->f->hash(data, len, digest)
#define HASH_size(ctx) (ctx)->f->size
#ifdef __cplusplus
}
#endif // __cplusplus
#endif // SECURITY_UTIL_LITE_HASH_INTERNAL_H__
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