| // Copyright 2016 Google Inc. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| #ifndef SECURITY_UTIL_LITE_HASH_INTERNAL_H__ |
| #define SECURITY_UTIL_LITE_HASH_INTERNAL_H__ |
| |
| #include <stddef.h> |
| #include <stdint.h> |
| |
| #ifdef LITE_EMULATED_64BIT_OPS |
| #define LITE_LShiftU64(a, b) LShiftU64((a), (b)) |
| #define LITE_RShiftU64(a, b) RShiftU64((a), (b)) |
| #else |
| #define LITE_LShiftU64(a, b) ((a) << (b)) |
| #define LITE_RShiftU64(a, b) ((a) >> (b)) |
| #endif // LITE_EMULATED_64BIT_OPS |
| |
| #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*, size_t); |
| const uint8_t* (* const final)(struct HASH_CTX*); |
| const uint8_t* (* const hash)(const void*, size_t, uint8_t*); |
| unsigned int size; |
| #ifdef SHA512_SUPPORT |
| unsigned int block_size; |
| #endif |
| } HASH_VTAB; |
| |
| typedef struct HASH_CTX { |
| const HASH_VTAB * f; |
| uint64_t count; |
| #ifndef SHA512_SUPPORT |
| uint8_t buf[64]; |
| uint32_t state[8]; // upto SHA2-256 |
| #else |
| uint8_t buf[128]; |
| uint64_t state[8]; // upto SHA2-512 |
| #endif |
| } 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 SHA512_SUPPORT |
| #define HASH_block_size(ctx) (ctx)->f->block_size |
| #else |
| #define HASH_block_size(ctx) sizeof((ctx)->buf) |
| #endif |
| |
| #ifdef __cplusplus |
| } |
| #endif // __cplusplus |
| |
| #endif // SECURITY_UTIL_LITE_HASH_INTERNAL_H__ |