Warning: That file was not part of the compilation database. It may have many parsing errors.
| 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
|---|---|
| 2 | /* |
| 3 | * Handle partial blocks for block hash. |
| 4 | * |
| 5 | * Copyright (c) 2015 Linaro Ltd <ard.biesheuvel@linaro.org> |
| 6 | * Copyright (c) 2025 Herbert Xu <herbert@gondor.apana.org.au> |
| 7 | */ |
| 8 | |
| 9 | #ifndef _CRYPTO_INTERNAL_BLOCKHASH_H |
| 10 | #define _CRYPTO_INTERNAL_BLOCKHASH_H |
| 11 | |
| 12 | #include <linux/string.h> |
| 13 | #include <linux/types.h> |
| 14 | |
| 15 | #define BLOCK_HASH_UPDATE_BASE(block_fn, state, src, nbytes, bs, dv, \ |
| 16 | buf, buflen) \ |
| 17 | ({ \ |
| 18 | typeof(block_fn) *_block_fn = &(block_fn); \ |
| 19 | typeof(state + 0) _state = (state); \ |
| 20 | unsigned int _buflen = (buflen); \ |
| 21 | size_t _nbytes = (nbytes); \ |
| 22 | unsigned int _bs = (bs); \ |
| 23 | const u8 *_src = (src); \ |
| 24 | u8 *_buf = (buf); \ |
| 25 | while ((_buflen + _nbytes) >= _bs) { \ |
| 26 | const u8 *data = _src; \ |
| 27 | size_t len = _nbytes; \ |
| 28 | size_t blocks; \ |
| 29 | int remain; \ |
| 30 | if (_buflen) { \ |
| 31 | remain = _bs - _buflen; \ |
| 32 | memcpy(_buf + _buflen, _src, remain); \ |
| 33 | data = _buf; \ |
| 34 | len = _bs; \ |
| 35 | } \ |
| 36 | remain = len % bs; \ |
| 37 | blocks = (len - remain) / (dv); \ |
| 38 | (*_block_fn)(_state, data, blocks); \ |
| 39 | _src += len - remain - _buflen; \ |
| 40 | _nbytes -= len - remain - _buflen; \ |
| 41 | _buflen = 0; \ |
| 42 | } \ |
| 43 | memcpy(_buf + _buflen, _src, _nbytes); \ |
| 44 | _buflen += _nbytes; \ |
| 45 | }) |
| 46 | |
| 47 | #define BLOCK_HASH_UPDATE(block, state, src, nbytes, bs, buf, buflen) \ |
| 48 | BLOCK_HASH_UPDATE_BASE(block, state, src, nbytes, bs, 1, buf, buflen) |
| 49 | #define BLOCK_HASH_UPDATE_BLOCKS(block, state, src, nbytes, bs, buf, buflen) \ |
| 50 | BLOCK_HASH_UPDATE_BASE(block, state, src, nbytes, bs, bs, buf, buflen) |
| 51 | |
| 52 | #endif /* _CRYPTO_INTERNAL_BLOCKHASH_H */ |
| 53 |
Warning: That file was not part of the compilation database. It may have many parsing errors.