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