49 lines
1.3 KiB
C
49 lines
1.3 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* CAAM/SEC 4.x definitions for handling key-generation jobs
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*
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* Copyright 2008-2011 Freescale Semiconductor, Inc.
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*
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*/
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/**
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* split_key_len - Compute MDHA split key length for a given algorithm
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* @hash: Hashing algorithm selection, one of OP_ALG_ALGSEL_* - MD5, SHA1,
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* SHA224, SHA384, SHA512.
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*
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* Return: MDHA split key length
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*/
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static inline u32 split_key_len(u32 hash)
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{
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/* Sizes for MDHA pads (*not* keys): MD5, SHA1, 224, 256, 384, 512 */
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static const u8 mdpadlen[] = { 16, 20, 32, 32, 64, 64 };
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u32 idx;
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idx = (hash & OP_ALG_ALGSEL_SUBMASK) >> OP_ALG_ALGSEL_SHIFT;
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return (u32)(mdpadlen[idx] * 2);
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}
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/**
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* split_key_pad_len - Compute MDHA split key pad length for a given algorithm
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* @hash: Hashing algorithm selection, one of OP_ALG_ALGSEL_* - MD5, SHA1,
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* SHA224, SHA384, SHA512.
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*
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* Return: MDHA split key pad length
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*/
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static inline u32 split_key_pad_len(u32 hash)
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{
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return ALIGN(split_key_len(hash), 16);
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}
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struct split_key_result {
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struct completion completion;
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int err;
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};
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void split_key_done(struct device *dev, u32 *desc, u32 err, void *context);
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int gen_split_key(struct device *jrdev, u8 *key_out,
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struct alginfo * const adata, const u8 *key_in, u32 keylen,
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int max_keylen);
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