97 lines
2.4 KiB
C
97 lines
2.4 KiB
C
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/*
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* sha512-neon-glue.c - accelerated SHA-384/512 for ARM NEON
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*
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* Copyright (C) 2015 Linaro Ltd <ard.biesheuvel@linaro.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <crypto/internal/hash.h>
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#include <crypto/sha.h>
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#include <crypto/sha512_base.h>
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#include <linux/crypto.h>
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#include <linux/module.h>
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#include <asm/simd.h>
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#include <asm/neon.h>
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#include "sha512.h"
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MODULE_ALIAS_CRYPTO("sha384-neon");
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MODULE_ALIAS_CRYPTO("sha512-neon");
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asmlinkage void sha512_block_data_order_neon(u64 *state, u8 const *src,
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int blocks);
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static int sha512_neon_update(struct shash_desc *desc, const u8 *data,
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unsigned int len)
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{
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struct sha512_state *sctx = shash_desc_ctx(desc);
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if (!may_use_simd() ||
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(sctx->count[0] % SHA512_BLOCK_SIZE) + len < SHA512_BLOCK_SIZE)
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return sha512_arm_update(desc, data, len);
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kernel_neon_begin();
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sha512_base_do_update(desc, data, len,
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(sha512_block_fn *)sha512_block_data_order_neon);
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kernel_neon_end();
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return 0;
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}
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static int sha512_neon_finup(struct shash_desc *desc, const u8 *data,
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unsigned int len, u8 *out)
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{
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if (!may_use_simd())
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return sha512_arm_finup(desc, data, len, out);
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kernel_neon_begin();
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if (len)
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sha512_base_do_update(desc, data, len,
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(sha512_block_fn *)sha512_block_data_order_neon);
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sha512_base_do_finalize(desc,
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(sha512_block_fn *)sha512_block_data_order_neon);
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kernel_neon_end();
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return sha512_base_finish(desc, out);
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}
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static int sha512_neon_final(struct shash_desc *desc, u8 *out)
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{
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return sha512_neon_finup(desc, NULL, 0, out);
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}
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struct shash_alg sha512_neon_algs[] = { {
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.init = sha384_base_init,
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.update = sha512_neon_update,
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.final = sha512_neon_final,
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.finup = sha512_neon_finup,
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.descsize = sizeof(struct sha512_state),
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.digestsize = SHA384_DIGEST_SIZE,
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.base = {
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.cra_name = "sha384",
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.cra_driver_name = "sha384-neon",
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.cra_priority = 300,
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.cra_blocksize = SHA384_BLOCK_SIZE,
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.cra_module = THIS_MODULE,
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}
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}, {
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.init = sha512_base_init,
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.update = sha512_neon_update,
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.final = sha512_neon_final,
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.finup = sha512_neon_finup,
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.descsize = sizeof(struct sha512_state),
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.digestsize = SHA512_DIGEST_SIZE,
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.base = {
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.cra_name = "sha512",
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.cra_driver_name = "sha512-neon",
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.cra_priority = 300,
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.cra_blocksize = SHA512_BLOCK_SIZE,
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.cra_module = THIS_MODULE,
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}
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} };
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