1 /*
2  * Copyright 2007 The Android Open Source Project
3  *
4  * Redistribution and use in source and binary forms, with or without
5  * modification, are permitted provided that the following conditions are met:
6  *     * Redistributions of source code must retain the above copyright
7  *       notice, this list of conditions and the following disclaimer.
8  *     * Redistributions in binary form must reproduce the above copyright
9  *       notice, this list of conditions and the following disclaimer in the
10  *       documentation and/or other materials provided with the distribution.
11  *     * Neither the name of Google Inc. nor the names of its contributors may
12  *       be used to endorse or promote products derived from this software
13  *       without specific prior written permission.
14  *
15  * THIS SOFTWARE IS PROVIDED BY Google Inc. ``AS IS'' AND ANY EXPRESS OR
16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
17  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
18  * EVENT SHALL Google Inc. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
19  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
20  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
21  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
22  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
23  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
24  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25  */
26 
27 #ifndef SYSTEM_CORE_INCLUDE_MINCRYPT_HASH_INTERNAL_H_
28 #define SYSTEM_CORE_INCLUDE_MINCRYPT_HASH_INTERNAL_H_
29 
30 #include <stdint.h>
31 
32 #ifdef __cplusplus
33 extern "C" {
34 #endif  // __cplusplus
35 
36 struct HASH_CTX;  // forward decl
37 
38 typedef struct HASH_VTAB {
39   void (* const init)(struct HASH_CTX*);
40   void (* const update)(struct HASH_CTX*, const void*, uint32_t);
41   const uint8_t* (* const final)(struct HASH_CTX*);
42   const uint8_t* (* const hash)(const void*, uint32_t, uint8_t*);
43   int size;
44 } HASH_VTAB;
45 
46 typedef struct HASH_CTX {
47   const HASH_VTAB * f;
48   uint64_t count;
49   union {
50       uint8_t buf[64];
51       uint32_t buf32[64 / 4];
52   };
53   uint32_t state[8];  // upto SHA2
54 } HASH_CTX;
55 
56 #define HASH_init(ctx) (ctx)->f->init(ctx)
57 #define HASH_update(ctx, data, len) (ctx)->f->update(ctx, data, len)
58 #define HASH_final(ctx) (ctx)->f->final(ctx)
59 #define HASH_hash(data, len, digest) (ctx)->f->hash(data, len, digest)
60 #define HASH_size(ctx) (ctx)->f->size
61 
62 #ifdef __cplusplus
63 }
64 #endif  // __cplusplus
65 
66 #endif  // SYSTEM_CORE_INCLUDE_MINCRYPT_HASH_INTERNAL_H_
67