| /* |
| * Glue code for the SHA512 Secure Hash Algorithm assembly implementation |
| * using NEON instructions. |
| * |
| * Copyright © 2014 Jussi Kivilinna <jussi.kivilinna@iki.fi> |
| * |
| * This file is based on sha512_ssse3_glue.c: |
| * Copyright (C) 2013 Intel Corporation |
| * Author: Tim Chen <tim.c.chen@linux.intel.com> |
| * |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License as published by the Free |
| * Software Foundation; either version 2 of the License, or (at your option) |
| * any later version. |
| * |
| */ |
| |
| #include <crypto/internal/hash.h> |
| #include <linux/init.h> |
| #include <linux/module.h> |
| #include <linux/mm.h> |
| #include <linux/cryptohash.h> |
| #include <linux/types.h> |
| #include <linux/string.h> |
| #include <crypto/sha.h> |
| #include <asm/byteorder.h> |
| #include <asm/simd.h> |
| #include <asm/neon.h> |
| |
| |
| static const u64 sha512_k[] = { |
| 0x428a2f98d728ae22ULL, 0x7137449123ef65cdULL, |
| 0xb5c0fbcfec4d3b2fULL, 0xe9b5dba58189dbbcULL, |
| 0x3956c25bf348b538ULL, 0x59f111f1b605d019ULL, |
| 0x923f82a4af194f9bULL, 0xab1c5ed5da6d8118ULL, |
| 0xd807aa98a3030242ULL, 0x12835b0145706fbeULL, |
| 0x243185be4ee4b28cULL, 0x550c7dc3d5ffb4e2ULL, |
| 0x72be5d74f27b896fULL, 0x80deb1fe3b1696b1ULL, |
| 0x9bdc06a725c71235ULL, 0xc19bf174cf692694ULL, |
| 0xe49b69c19ef14ad2ULL, 0xefbe4786384f25e3ULL, |
| 0x0fc19dc68b8cd5b5ULL, 0x240ca1cc77ac9c65ULL, |
| 0x2de92c6f592b0275ULL, 0x4a7484aa6ea6e483ULL, |
| 0x5cb0a9dcbd41fbd4ULL, 0x76f988da831153b5ULL, |
| 0x983e5152ee66dfabULL, 0xa831c66d2db43210ULL, |
| 0xb00327c898fb213fULL, 0xbf597fc7beef0ee4ULL, |
| 0xc6e00bf33da88fc2ULL, 0xd5a79147930aa725ULL, |
| 0x06ca6351e003826fULL, 0x142929670a0e6e70ULL, |
| 0x27b70a8546d22ffcULL, 0x2e1b21385c26c926ULL, |
| 0x4d2c6dfc5ac42aedULL, 0x53380d139d95b3dfULL, |
| 0x650a73548baf63deULL, 0x766a0abb3c77b2a8ULL, |
| 0x81c2c92e47edaee6ULL, 0x92722c851482353bULL, |
| 0xa2bfe8a14cf10364ULL, 0xa81a664bbc423001ULL, |
| 0xc24b8b70d0f89791ULL, 0xc76c51a30654be30ULL, |
| 0xd192e819d6ef5218ULL, 0xd69906245565a910ULL, |
| 0xf40e35855771202aULL, 0x106aa07032bbd1b8ULL, |
| 0x19a4c116b8d2d0c8ULL, 0x1e376c085141ab53ULL, |
| 0x2748774cdf8eeb99ULL, 0x34b0bcb5e19b48a8ULL, |
| 0x391c0cb3c5c95a63ULL, 0x4ed8aa4ae3418acbULL, |
| 0x5b9cca4f7763e373ULL, 0x682e6ff3d6b2b8a3ULL, |
| 0x748f82ee5defb2fcULL, 0x78a5636f43172f60ULL, |
| 0x84c87814a1f0ab72ULL, 0x8cc702081a6439ecULL, |
| 0x90befffa23631e28ULL, 0xa4506cebde82bde9ULL, |
| 0xbef9a3f7b2c67915ULL, 0xc67178f2e372532bULL, |
| 0xca273eceea26619cULL, 0xd186b8c721c0c207ULL, |
| 0xeada7dd6cde0eb1eULL, 0xf57d4f7fee6ed178ULL, |
| 0x06f067aa72176fbaULL, 0x0a637dc5a2c898a6ULL, |
| 0x113f9804bef90daeULL, 0x1b710b35131c471bULL, |
| 0x28db77f523047d84ULL, 0x32caab7b40c72493ULL, |
| 0x3c9ebe0a15c9bebcULL, 0x431d67c49c100d4cULL, |
| 0x4cc5d4becb3e42b6ULL, 0x597f299cfc657e2aULL, |
| 0x5fcb6fab3ad6faecULL, 0x6c44198c4a475817ULL |
| }; |
| |
| |
| asmlinkage void sha512_transform_neon(u64 *digest, const void *data, |
| const u64 k[], unsigned int num_blks); |
| |
| |
| static int sha512_neon_init(struct shash_desc *desc) |
| { |
| struct sha512_state *sctx = shash_desc_ctx(desc); |
| |
| sctx->state[0] = SHA512_H0; |
| sctx->state[1] = SHA512_H1; |
| sctx->state[2] = SHA512_H2; |
| sctx->state[3] = SHA512_H3; |
| sctx->state[4] = SHA512_H4; |
| sctx->state[5] = SHA512_H5; |
| sctx->state[6] = SHA512_H6; |
| sctx->state[7] = SHA512_H7; |
| sctx->count[0] = sctx->count[1] = 0; |
| |
| return 0; |
| } |
| |
| static int __sha512_neon_update(struct shash_desc *desc, const u8 *data, |
| unsigned int len, unsigned int partial) |
| { |
| struct sha512_state *sctx = shash_desc_ctx(desc); |
| unsigned int done = 0; |
| |
| sctx->count[0] += len; |
| if (sctx->count[0] < len) |
| sctx->count[1]++; |
| |
| if (partial) { |
| done = SHA512_BLOCK_SIZE - partial; |
| memcpy(sctx->buf + partial, data, done); |
| sha512_transform_neon(sctx->state, sctx->buf, sha512_k, 1); |
| } |
| |
| if (len - done >= SHA512_BLOCK_SIZE) { |
| const unsigned int rounds = (len - done) / SHA512_BLOCK_SIZE; |
| |
| sha512_transform_neon(sctx->state, data + done, sha512_k, |
| rounds); |
| |
| done += rounds * SHA512_BLOCK_SIZE; |
| } |
| |
| memcpy(sctx->buf, data + done, len - done); |
| |
| return 0; |
| } |
| |
| static int sha512_neon_update(struct shash_desc *desc, const u8 *data, |
| unsigned int len) |
| { |
| struct sha512_state *sctx = shash_desc_ctx(desc); |
| unsigned int partial = sctx->count[0] % SHA512_BLOCK_SIZE; |
| int res; |
| |
| /* Handle the fast case right here */ |
| if (partial + len < SHA512_BLOCK_SIZE) { |
| sctx->count[0] += len; |
| if (sctx->count[0] < len) |
| sctx->count[1]++; |
| memcpy(sctx->buf + partial, data, len); |
| |
| return 0; |
| } |
| |
| if (!may_use_simd()) { |
| res = crypto_sha512_update(desc, data, len); |
| } else { |
| kernel_neon_begin(); |
| res = __sha512_neon_update(desc, data, len, partial); |
| kernel_neon_end(); |
| } |
| |
| return res; |
| } |
| |
| |
| /* Add padding and return the message digest. */ |
| static int sha512_neon_final(struct shash_desc *desc, u8 *out) |
| { |
| struct sha512_state *sctx = shash_desc_ctx(desc); |
| unsigned int i, index, padlen; |
| __be64 *dst = (__be64 *)out; |
| __be64 bits[2]; |
| static const u8 padding[SHA512_BLOCK_SIZE] = { 0x80, }; |
| |
| /* save number of bits */ |
| bits[1] = cpu_to_be64(sctx->count[0] << 3); |
| bits[0] = cpu_to_be64(sctx->count[1] << 3 | sctx->count[0] >> 61); |
| |
| /* Pad out to 112 mod 128 and append length */ |
| index = sctx->count[0] & 0x7f; |
| padlen = (index < 112) ? (112 - index) : ((128+112) - index); |
| |
| if (!may_use_simd()) { |
| crypto_sha512_update(desc, padding, padlen); |
| crypto_sha512_update(desc, (const u8 *)&bits, sizeof(bits)); |
| } else { |
| kernel_neon_begin(); |
| /* We need to fill a whole block for __sha512_neon_update() */ |
| if (padlen <= 112) { |
| sctx->count[0] += padlen; |
| if (sctx->count[0] < padlen) |
| sctx->count[1]++; |
| memcpy(sctx->buf + index, padding, padlen); |
| } else { |
| __sha512_neon_update(desc, padding, padlen, index); |
| } |
| __sha512_neon_update(desc, (const u8 *)&bits, |
| sizeof(bits), 112); |
| kernel_neon_end(); |
| } |
| |
| /* Store state in digest */ |
| for (i = 0; i < 8; i++) |
| dst[i] = cpu_to_be64(sctx->state[i]); |
| |
| /* Wipe context */ |
| memset(sctx, 0, sizeof(*sctx)); |
| |
| return 0; |
| } |
| |
| static int sha512_neon_export(struct shash_desc *desc, void *out) |
| { |
| struct sha512_state *sctx = shash_desc_ctx(desc); |
| |
| memcpy(out, sctx, sizeof(*sctx)); |
| |
| return 0; |
| } |
| |
| static int sha512_neon_import(struct shash_desc *desc, const void *in) |
| { |
| struct sha512_state *sctx = shash_desc_ctx(desc); |
| |
| memcpy(sctx, in, sizeof(*sctx)); |
| |
| return 0; |
| } |
| |
| static int sha384_neon_init(struct shash_desc *desc) |
| { |
| struct sha512_state *sctx = shash_desc_ctx(desc); |
| |
| sctx->state[0] = SHA384_H0; |
| sctx->state[1] = SHA384_H1; |
| sctx->state[2] = SHA384_H2; |
| sctx->state[3] = SHA384_H3; |
| sctx->state[4] = SHA384_H4; |
| sctx->state[5] = SHA384_H5; |
| sctx->state[6] = SHA384_H6; |
| sctx->state[7] = SHA384_H7; |
| |
| sctx->count[0] = sctx->count[1] = 0; |
| |
| return 0; |
| } |
| |
| static int sha384_neon_final(struct shash_desc *desc, u8 *hash) |
| { |
| u8 D[SHA512_DIGEST_SIZE]; |
| |
| sha512_neon_final(desc, D); |
| |
| memcpy(hash, D, SHA384_DIGEST_SIZE); |
| memset(D, 0, SHA512_DIGEST_SIZE); |
| |
| return 0; |
| } |
| |
| static struct shash_alg algs[] = { { |
| .digestsize = SHA512_DIGEST_SIZE, |
| .init = sha512_neon_init, |
| .update = sha512_neon_update, |
| .final = sha512_neon_final, |
| .export = sha512_neon_export, |
| .import = sha512_neon_import, |
| .descsize = sizeof(struct sha512_state), |
| .statesize = sizeof(struct sha512_state), |
| .base = { |
| .cra_name = "sha512", |
| .cra_driver_name = "sha512-neon", |
| .cra_priority = 250, |
| .cra_flags = CRYPTO_ALG_TYPE_SHASH, |
| .cra_blocksize = SHA512_BLOCK_SIZE, |
| .cra_module = THIS_MODULE, |
| } |
| }, { |
| .digestsize = SHA384_DIGEST_SIZE, |
| .init = sha384_neon_init, |
| .update = sha512_neon_update, |
| .final = sha384_neon_final, |
| .export = sha512_neon_export, |
| .import = sha512_neon_import, |
| .descsize = sizeof(struct sha512_state), |
| .statesize = sizeof(struct sha512_state), |
| .base = { |
| .cra_name = "sha384", |
| .cra_driver_name = "sha384-neon", |
| .cra_priority = 250, |
| .cra_flags = CRYPTO_ALG_TYPE_SHASH, |
| .cra_blocksize = SHA384_BLOCK_SIZE, |
| .cra_module = THIS_MODULE, |
| } |
| } }; |
| |
| static int __init sha512_neon_mod_init(void) |
| { |
| if (!cpu_has_neon()) |
| return -ENODEV; |
| |
| return crypto_register_shashes(algs, ARRAY_SIZE(algs)); |
| } |
| |
| static void __exit sha512_neon_mod_fini(void) |
| { |
| crypto_unregister_shashes(algs, ARRAY_SIZE(algs)); |
| } |
| |
| module_init(sha512_neon_mod_init); |
| module_exit(sha512_neon_mod_fini); |
| |
| MODULE_LICENSE("GPL"); |
| MODULE_DESCRIPTION("SHA512 Secure Hash Algorithm, NEON accelerated"); |
| |
| MODULE_ALIAS("sha512"); |
| MODULE_ALIAS("sha384"); |