Release 4.16 drivers/crypto/caam/key_gen.h
/* SPDX-License-Identifier: GPL-2.0 */
/*
* CAAM/SEC 4.x definitions for handling key-generation jobs
*
* Copyright 2008-2011 Freescale Semiconductor, Inc.
*
*/
/**
* split_key_len - Compute MDHA split key length for a given algorithm
* @hash: Hashing algorithm selection, one of OP_ALG_ALGSEL_* - MD5, SHA1,
* SHA224, SHA384, SHA512.
*
* Return: MDHA split key length
*/
static inline u32 split_key_len(u32 hash)
{
/* Sizes for MDHA pads (*not* keys): MD5, SHA1, 224, 256, 384, 512 */
static const u8 mdpadlen[] = { 16, 20, 32, 32, 64, 64 };
u32 idx;
idx = (hash & OP_ALG_ALGSEL_SUBMASK) >> OP_ALG_ALGSEL_SHIFT;
return (u32)(mdpadlen[idx] * 2);
}
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/**
* split_key_pad_len - Compute MDHA split key pad length for a given algorithm
* @hash: Hashing algorithm selection, one of OP_ALG_ALGSEL_* - MD5, SHA1,
* SHA224, SHA384, SHA512.
*
* Return: MDHA split key pad length
*/
static inline u32 split_key_pad_len(u32 hash)
{
return ALIGN(split_key_len(hash), 16);
}
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struct split_key_result {
struct completion completion;
int err;
};
void split_key_done(struct device *dev, u32 *desc, u32 err, void *context);
int gen_split_key(struct device *jrdev, u8 *key_out,
struct alginfo * const adata, const u8 *key_in, u32 keylen,
int max_keylen);
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