1b2441318SGreg Kroah-Hartman /* SPDX-License-Identifier: GPL-2.0 */
24c1ec1f9SYuan Kang /*
34c1ec1f9SYuan Kang * CAAM/SEC 4.x definitions for handling key-generation jobs
44c1ec1f9SYuan Kang *
54c1ec1f9SYuan Kang * Copyright 2008-2011 Freescale Semiconductor, Inc.
64c1ec1f9SYuan Kang *
74c1ec1f9SYuan Kang */
84c1ec1f9SYuan Kang
97e0880b9SHoria Geantă /**
107e0880b9SHoria Geantă * split_key_len - Compute MDHA split key length for a given algorithm
117e0880b9SHoria Geantă * @hash: Hashing algorithm selection, one of OP_ALG_ALGSEL_* - MD5, SHA1,
127e0880b9SHoria Geantă * SHA224, SHA384, SHA512.
137e0880b9SHoria Geantă *
147e0880b9SHoria Geantă * Return: MDHA split key length
157e0880b9SHoria Geantă */
split_key_len(u32 hash)167e0880b9SHoria Geantă static inline u32 split_key_len(u32 hash)
177e0880b9SHoria Geantă {
187e0880b9SHoria Geantă /* Sizes for MDHA pads (*not* keys): MD5, SHA1, 224, 256, 384, 512 */
197e0880b9SHoria Geantă static const u8 mdpadlen[] = { 16, 20, 32, 32, 64, 64 };
207e0880b9SHoria Geantă u32 idx;
217e0880b9SHoria Geantă
227e0880b9SHoria Geantă idx = (hash & OP_ALG_ALGSEL_SUBMASK) >> OP_ALG_ALGSEL_SHIFT;
237e0880b9SHoria Geantă
247e0880b9SHoria Geantă return (u32)(mdpadlen[idx] * 2);
257e0880b9SHoria Geantă }
267e0880b9SHoria Geantă
277e0880b9SHoria Geantă /**
287e0880b9SHoria Geantă * split_key_pad_len - Compute MDHA split key pad length for a given algorithm
297e0880b9SHoria Geantă * @hash: Hashing algorithm selection, one of OP_ALG_ALGSEL_* - MD5, SHA1,
307e0880b9SHoria Geantă * SHA224, SHA384, SHA512.
317e0880b9SHoria Geantă *
327e0880b9SHoria Geantă * Return: MDHA split key pad length
337e0880b9SHoria Geantă */
split_key_pad_len(u32 hash)347e0880b9SHoria Geantă static inline u32 split_key_pad_len(u32 hash)
357e0880b9SHoria Geantă {
367e0880b9SHoria Geantă return ALIGN(split_key_len(hash), 16);
377e0880b9SHoria Geantă }
387e0880b9SHoria Geantă
394c1ec1f9SYuan Kang struct split_key_result {
404c1ec1f9SYuan Kang struct completion completion;
414c1ec1f9SYuan Kang int err;
424c1ec1f9SYuan Kang };
434c1ec1f9SYuan Kang
444c1ec1f9SYuan Kang void split_key_done(struct device *dev, u32 *desc, u32 err, void *context);
454c1ec1f9SYuan Kang
46db57656bSHoria Geantă int gen_split_key(struct device *jrdev, u8 *key_out,
476655cb8eSHoria Geantă struct alginfo * const adata, const u8 *key_in, u32 keylen,
486655cb8eSHoria Geantă int max_keylen);
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