diff options
Diffstat (limited to 'arch/arm64/crypto/sha3-ce-glue.c')
| -rw-r--r-- | arch/arm64/crypto/sha3-ce-glue.c | 161 |
1 files changed, 161 insertions, 0 deletions
diff --git a/arch/arm64/crypto/sha3-ce-glue.c b/arch/arm64/crypto/sha3-ce-glue.c new file mode 100644 index 000000000..df20ab645 --- /dev/null +++ b/arch/arm64/crypto/sha3-ce-glue.c @@ -0,0 +1,161 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * sha3-ce-glue.c - core SHA-3 transform using v8.2 Crypto Extensions + * + * Copyright (C) 2018 Linaro Ltd <ard.biesheuvel@linaro.org> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <asm/hwcap.h> +#include <asm/neon.h> +#include <asm/simd.h> +#include <asm/unaligned.h> +#include <crypto/internal/hash.h> +#include <crypto/sha3.h> +#include <linux/cpufeature.h> +#include <linux/crypto.h> +#include <linux/module.h> + +MODULE_DESCRIPTION("SHA3 secure hash using ARMv8 Crypto Extensions"); +MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@linaro.org>"); +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS_CRYPTO("sha3-224"); +MODULE_ALIAS_CRYPTO("sha3-256"); +MODULE_ALIAS_CRYPTO("sha3-384"); +MODULE_ALIAS_CRYPTO("sha3-512"); + +asmlinkage void sha3_ce_transform(u64 *st, const u8 *data, int blocks, + int md_len); + +static int sha3_update(struct shash_desc *desc, const u8 *data, + unsigned int len) +{ + struct sha3_state *sctx = shash_desc_ctx(desc); + unsigned int digest_size = crypto_shash_digestsize(desc->tfm); + + if (!may_use_simd()) + return crypto_sha3_update(desc, data, len); + + if ((sctx->partial + len) >= sctx->rsiz) { + int blocks; + + if (sctx->partial) { + int p = sctx->rsiz - sctx->partial; + + memcpy(sctx->buf + sctx->partial, data, p); + kernel_neon_begin(); + sha3_ce_transform(sctx->st, sctx->buf, 1, digest_size); + kernel_neon_end(); + + data += p; + len -= p; + sctx->partial = 0; + } + + blocks = len / sctx->rsiz; + len %= sctx->rsiz; + + if (blocks) { + kernel_neon_begin(); + sha3_ce_transform(sctx->st, data, blocks, digest_size); + kernel_neon_end(); + data += blocks * sctx->rsiz; + } + } + + if (len) { + memcpy(sctx->buf + sctx->partial, data, len); + sctx->partial += len; + } + return 0; +} + +static int sha3_final(struct shash_desc *desc, u8 *out) +{ + struct sha3_state *sctx = shash_desc_ctx(desc); + unsigned int digest_size = crypto_shash_digestsize(desc->tfm); + __le64 *digest = (__le64 *)out; + int i; + + if (!may_use_simd()) + return crypto_sha3_final(desc, out); + + sctx->buf[sctx->partial++] = 0x06; + memset(sctx->buf + sctx->partial, 0, sctx->rsiz - sctx->partial); + sctx->buf[sctx->rsiz - 1] |= 0x80; + + kernel_neon_begin(); + sha3_ce_transform(sctx->st, sctx->buf, 1, digest_size); + kernel_neon_end(); + + for (i = 0; i < digest_size / 8; i++) + put_unaligned_le64(sctx->st[i], digest++); + + if (digest_size & 4) + put_unaligned_le32(sctx->st[i], (__le32 *)digest); + + *sctx = (struct sha3_state){}; + return 0; +} + +static struct shash_alg algs[] = { { + .digestsize = SHA3_224_DIGEST_SIZE, + .init = crypto_sha3_init, + .update = sha3_update, + .final = sha3_final, + .descsize = sizeof(struct sha3_state), + .base.cra_name = "sha3-224", + .base.cra_driver_name = "sha3-224-ce", + .base.cra_blocksize = SHA3_224_BLOCK_SIZE, + .base.cra_module = THIS_MODULE, + .base.cra_priority = 200, +}, { + .digestsize = SHA3_256_DIGEST_SIZE, + .init = crypto_sha3_init, + .update = sha3_update, + .final = sha3_final, + .descsize = sizeof(struct sha3_state), + .base.cra_name = "sha3-256", + .base.cra_driver_name = "sha3-256-ce", + .base.cra_blocksize = SHA3_256_BLOCK_SIZE, + .base.cra_module = THIS_MODULE, + .base.cra_priority = 200, +}, { + .digestsize = SHA3_384_DIGEST_SIZE, + .init = crypto_sha3_init, + .update = sha3_update, + .final = sha3_final, + .descsize = sizeof(struct sha3_state), + .base.cra_name = "sha3-384", + .base.cra_driver_name = "sha3-384-ce", + .base.cra_blocksize = SHA3_384_BLOCK_SIZE, + .base.cra_module = THIS_MODULE, + .base.cra_priority = 200, +}, { + .digestsize = SHA3_512_DIGEST_SIZE, + .init = crypto_sha3_init, + .update = sha3_update, + .final = sha3_final, + .descsize = sizeof(struct sha3_state), + .base.cra_name = "sha3-512", + .base.cra_driver_name = "sha3-512-ce", + .base.cra_blocksize = SHA3_512_BLOCK_SIZE, + .base.cra_module = THIS_MODULE, + .base.cra_priority = 200, +} }; + +static int __init sha3_neon_mod_init(void) +{ + return crypto_register_shashes(algs, ARRAY_SIZE(algs)); +} + +static void __exit sha3_neon_mod_fini(void) +{ + crypto_unregister_shashes(algs, ARRAY_SIZE(algs)); +} + +module_cpu_feature_match(SHA3, sha3_neon_mod_init); +module_exit(sha3_neon_mod_fini); |