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// SPDX-License-Identifier: GPL-2.0-only
/*
* sha2-ce-glue.c - SHA-256 using ARMv8 Crypto Extensions
*
* Copyright (C) 2014 - 2017 Linaro Ltd <ard.biesheuvel@linaro.org>
* Copyright 2022 NXP
*/
#include <linux/kernel.h>
#include <linux/linkage.h>
#include <crypto/sha256_base.h>
struct sha256_ce_state {
struct sha256_state sst;
u32 finalize;
};
extern const u32 sha256_ce_offsetof_count;
extern const u32 sha256_ce_offsetof_finalize;
asmlinkage int sha2_ce_transform(struct sha256_ce_state *sst, u8 const *src,
int blocks);
static void __sha2_ce_transform(struct sha256_state *sst, u8 const *src,
int blocks)
{
while (blocks) {
int rem;
rem = sha2_ce_transform(container_of(sst, struct sha256_ce_state,
sst), src, blocks);
src += (blocks - rem) * SHA256_BLOCK_SIZE;
blocks = rem;
}
}
const u32 sha256_ce_offsetof_count = offsetof(struct sha256_ce_state,
sst.count);
const u32 sha256_ce_offsetof_finalize = offsetof(struct sha256_ce_state,
finalize);
static void sha256_ce_update(struct sha256_ce_state *sctx, const u8 *data,
unsigned int len)
{
sctx->finalize = 0;
sha256_base_do_update(&sctx->sst, data, len, __sha2_ce_transform);
}
static void sha256_ce_final(struct sha256_ce_state *sctx, u8 *out)
{
sctx->finalize = 0;
sha256_base_do_finalize(&sctx->sst, __sha2_ce_transform);
sha256_base_finish(&sctx->sst, out);
}
/*
* Output = SHA-256( input buffer ).
*/
void sha256_ce(const unsigned char *input, unsigned int ilen, unsigned char *output)
{
struct sha256_ce_state sctx;
sha256_init(&sctx.sst);
sha256_ce_update(&sctx, input, ilen);
sha256_ce_final(&sctx, output);
}
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