1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2 | /* |
3 | * CAAM/SEC 4.x definitions for handling key-generation jobs |
4 | * |
5 | * Copyright 2008-2011 Freescale Semiconductor, Inc. |
6 | * |
7 | */ |
8 | |
9 | /** |
10 | * split_key_len - Compute MDHA split key length for a given algorithm |
11 | * @hash: Hashing algorithm selection, one of OP_ALG_ALGSEL_* - MD5, SHA1, |
12 | * SHA224, SHA384, SHA512. |
13 | * |
14 | * Return: MDHA split key length |
15 | */ |
16 | static inline u32 split_key_len(u32 hash) |
17 | { |
18 | /* Sizes for MDHA pads (*not* keys): MD5, SHA1, 224, 256, 384, 512 */ |
19 | static const u8 mdpadlen[] = { 16, 20, 32, 32, 64, 64 }; |
20 | u32 idx; |
21 | |
22 | idx = (hash & OP_ALG_ALGSEL_SUBMASK) >> OP_ALG_ALGSEL_SHIFT; |
23 | |
24 | return (u32)(mdpadlen[idx] * 2); |
25 | } |
26 | |
27 | /** |
28 | * split_key_pad_len - Compute MDHA split key pad length for a given algorithm |
29 | * @hash: Hashing algorithm selection, one of OP_ALG_ALGSEL_* - MD5, SHA1, |
30 | * SHA224, SHA384, SHA512. |
31 | * |
32 | * Return: MDHA split key pad length |
33 | */ |
34 | static inline u32 split_key_pad_len(u32 hash) |
35 | { |
36 | return ALIGN(split_key_len(hash), 16); |
37 | } |
38 | |
39 | struct split_key_result { |
40 | struct completion completion; |
41 | int err; |
42 | }; |
43 | |
44 | void split_key_done(struct device *dev, u32 *desc, u32 err, void *context); |
45 | |
46 | int gen_split_key(struct device *jrdev, u8 *key_out, |
47 | struct alginfo * const adata, const u8 *key_in, u32 keylen, |
48 | int max_keylen); |
49 | |