diff options
Diffstat (limited to 'arch/arm/crypto/sha1_neon_glue.c')
-rw-r--r-- | arch/arm/crypto/sha1_neon_glue.c | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/arch/arm/crypto/sha1_neon_glue.c b/arch/arm/crypto/sha1_neon_glue.c new file mode 100644 index 0000000000..9c70b87e69 --- /dev/null +++ b/arch/arm/crypto/sha1_neon_glue.c @@ -0,0 +1,102 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Glue code for the SHA1 Secure Hash Algorithm assembler implementation using + * ARM NEON instructions. + * + * Copyright © 2014 Jussi Kivilinna <jussi.kivilinna@iki.fi> + * + * This file is based on sha1_generic.c and sha1_ssse3_glue.c: + * Copyright (c) Alan Smithee. + * Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk> + * Copyright (c) Jean-Francois Dive <jef@linuxbe.org> + * Copyright (c) Mathias Krause <minipli@googlemail.com> + * Copyright (c) Chandramouli Narayanan <mouli@linux.intel.com> + */ + +#include <crypto/internal/hash.h> +#include <crypto/internal/simd.h> +#include <linux/init.h> +#include <linux/module.h> +#include <linux/mm.h> +#include <linux/types.h> +#include <crypto/sha1.h> +#include <crypto/sha1_base.h> +#include <asm/neon.h> +#include <asm/simd.h> + +#include "sha1.h" + +asmlinkage void sha1_transform_neon(struct sha1_state *state_h, + const u8 *data, int rounds); + +static int sha1_neon_update(struct shash_desc *desc, const u8 *data, + unsigned int len) +{ + struct sha1_state *sctx = shash_desc_ctx(desc); + + if (!crypto_simd_usable() || + (sctx->count % SHA1_BLOCK_SIZE) + len < SHA1_BLOCK_SIZE) + return sha1_update_arm(desc, data, len); + + kernel_neon_begin(); + sha1_base_do_update(desc, data, len, sha1_transform_neon); + kernel_neon_end(); + + return 0; +} + +static int sha1_neon_finup(struct shash_desc *desc, const u8 *data, + unsigned int len, u8 *out) +{ + if (!crypto_simd_usable()) + return sha1_finup_arm(desc, data, len, out); + + kernel_neon_begin(); + if (len) + sha1_base_do_update(desc, data, len, sha1_transform_neon); + sha1_base_do_finalize(desc, sha1_transform_neon); + kernel_neon_end(); + + return sha1_base_finish(desc, out); +} + +static int sha1_neon_final(struct shash_desc *desc, u8 *out) +{ + return sha1_neon_finup(desc, NULL, 0, out); +} + +static struct shash_alg alg = { + .digestsize = SHA1_DIGEST_SIZE, + .init = sha1_base_init, + .update = sha1_neon_update, + .final = sha1_neon_final, + .finup = sha1_neon_finup, + .descsize = sizeof(struct sha1_state), + .base = { + .cra_name = "sha1", + .cra_driver_name = "sha1-neon", + .cra_priority = 250, + .cra_blocksize = SHA1_BLOCK_SIZE, + .cra_module = THIS_MODULE, + } +}; + +static int __init sha1_neon_mod_init(void) +{ + if (!cpu_has_neon()) + return -ENODEV; + + return crypto_register_shash(&alg); +} + +static void __exit sha1_neon_mod_fini(void) +{ + crypto_unregister_shash(&alg); +} + +module_init(sha1_neon_mod_init); +module_exit(sha1_neon_mod_fini); + +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("SHA1 Secure Hash Algorithm, NEON accelerated"); +MODULE_ALIAS_CRYPTO("sha1"); |