File sha256-aarch64-hwaccel.patch of Package busybox
From ebd8cc322e3546cd9bd34a1f2399640f4cdd1f61 Mon Sep 17 00:00:00 2001 From: JulianDroske <JulianDroske@[email protected]> Date: Tue, 26 May 2026 02:58:42 +1000 Subject: [PATCH] libbb/sha256: support optional hardware acceleration This patch has been edited to work on busybox 1.38.0. Original patch: https://github.com/ziyao233/busybox/commit/47c7f62.patch Co-authored-by: Yao Zi <[email protected]> Signed-off-by: Julian Droske <[email protected]> --- libbb/Kbuild.src | 1 + libbb/hash_md5_sha.c | 15 +++- libbb/hash_sha256_hwaccel_aarch64.S | 134 ++++++++++++++++++++++++++++ 3 files changed, 147 insertions(+), 3 deletions(-) create mode 100644 libbb/hash_sha256_hwaccel_aarch64.S diff --git a/libbb/Kbuild.src b/libbb/Kbuild.src index cb8d2c2..81b6d15 100644 --- a/libbb/Kbuild.src +++ b/libbb/Kbuild.src @@ -62,6 +62,7 @@ lib-y += hash_sha1_hwaccel_x86-64.o lib-y += hash_sha1_hwaccel_x86-32.o lib-y += hash_sha256_hwaccel_x86-64.o lib-y += hash_sha256_hwaccel_x86-32.o +lib-y += hash_sha256_hwaccel_aarch64.o # Alternative (disabled) MD5 implementation #lib-y += hash_md5prime.o lib-y += messages.o diff --git a/libbb/hash_md5_sha.c b/libbb/hash_md5_sha.c index 9ebda23..c8478c6 100644 --- a/libbb/hash_md5_sha.c +++ b/libbb/hash_md5_sha.c @@ -8,12 +8,18 @@ */ #include "libbb.h" +#if defined(ENABLE_SHA256_HWACCEL) && defined(__aarch64__) +# include <sys/auxv.h> +#endif + #define STR1(s) #s #define STR(s) STR1(s) #define NEED_SHA512 (ENABLE_SHA512SUM || ENABLE_SHA384SUM || ENABLE_USE_BB_CRYPT_SHA) #if ENABLE_SHA1_HWACCEL || ENABLE_SHA256_HWACCEL +void FAST_FUNC sha1_process_block64_shaNI(sha1_ctx_t *ctx); +void FAST_FUNC sha256_process_block64_shaNI(sha256_ctx_t *ctx); # if defined(__GNUC__) && (defined(__i386__) || defined(__x86_64__)) static void cpuid_eax_ebx_ecx(unsigned *eax, unsigned *ebx, unsigned *ecx, unsigned *edx) { @@ -41,12 +47,10 @@ static NOINLINE int get_shaNI(void) shaNI = (int)ebx; return (int)ebx; } -void FAST_FUNC sha1_process_block64_shaNI(sha1_ctx_t *ctx); -void FAST_FUNC sha256_process_block64_shaNI(sha256_ctx_t *ctx); # if defined(__i386__) struct ASM_expects_76_shaNI { char t[1 - 2*(offsetof(sha256_ctx_t, hash) != 76)]; }; # endif -# if defined(__x86_64__) +# if defined(__x86_64__) || defined(__aarch64__) struct ASM_expects_80_shaNI { char t[1 - 2*(offsetof(sha256_ctx_t, hash) != 80)]; }; # endif # endif @@ -1260,6 +1264,11 @@ void FAST_FUNC sha256_begin(sha256_ctx_t *ctx) if (ni > 0) ctx->process_block = sha256_process_block64_shaNI; } +# elif defined(__GNUC__) && defined(__aarch64__) + { + if (getauxval(AT_HWCAP) & HWCAP_SHA2) + ctx->process_block = sha256_process_block64_shaNI; + } # endif #endif } diff --git a/libbb/hash_sha256_hwaccel_aarch64.S b/libbb/hash_sha256_hwaccel_aarch64.S new file mode 100644 index 0000000..5b7530d --- /dev/null +++ b/libbb/hash_sha256_hwaccel_aarch64.S @@ -0,0 +1,134 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * SHA-256 transform using v8 Crypto Extensions + * + * Adapted from Linux kernel arch/arm64/crypto/sha2-ce-core.S + * + * Copyright (C) 2014 Linaro Ltd <[email protected]> + * Copyright (C) 2025 Yao Zi <[email protected]> + */ + +#if ENABLE_SHA256_HWACCEL && defined(__GNUC__) && defined(__aarch64__) + .text + .arch armv8-a+crypto + + dga .req q20 + dgav .req v20 + dgb .req q21 + dgbv .req v21 + + t0 .req v22 + t1 .req v23 + + dg0q .req q24 + dg0v .req v24 + dg1q .req q25 + dg1v .req v25 + dg2q .req q26 + dg2v .req v26 + + .macro add_only, ev, rc, s0 + mov dg2v.16b, dg0v.16b + .ifeq \ev + add t1.4s, v\s0\().4s, \rc\().4s + sha256h dg0q, dg1q, t0.4s + sha256h2 dg1q, dg2q, t0.4s + .else + .ifnb \s0 + add t0.4s, v\s0\().4s, \rc\().4s + .endif + sha256h dg0q, dg1q, t1.4s + sha256h2 dg1q, dg2q, t1.4s + .endif + .endm + + .macro add_update, ev, rc, s0, s1, s2, s3 + sha256su0 v\s0\().4s, v\s1\().4s + add_only \ev, \rc, \s1 + sha256su1 v\s0\().4s, v\s2\().4s, v\s3\().4s + .endm + + /* + * The SHA-256 round constants + */ + .section ".rodata", "a" + .align 4 +.Lsha2_rcon: + .word 0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5 + .word 0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5 + .word 0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3 + .word 0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174 + .word 0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc + .word 0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da + .word 0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7 + .word 0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967 + .word 0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13 + .word 0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85 + .word 0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3 + .word 0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070 + .word 0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5 + .word 0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3 + .word 0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208 + .word 0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2 + + /* + * int sha256_process_block64_shaNI(sha256_ctx_t *ctx); + */ + .text + .global sha256_process_block64_shaNI + .type sha256_process_block64_shaNI, @function +sha256_process_block64_shaNI: + /* load round constants */ + adr x8, .Lsha2_rcon + ld1 { v0.4s- v3.4s}, [x8], #64 + ld1 { v4.4s- v7.4s}, [x8], #64 + ld1 { v8.4s-v11.4s}, [x8], #64 + ld1 {v12.4s-v15.4s}, [x8] + + /* load input */ + ld1 {v16.4s-v19.4s}, [x0] + + /* load state */ + add x0, x0, #80 + mov x1, x0 + ld1 {dgav.4s, dgbv.4s}, [x0] + +#ifndef BB_BIG_ENDIAN + rev32 v16.16b, v16.16b + rev32 v17.16b, v17.16b + rev32 v18.16b, v18.16b + rev32 v19.16b, v19.16b +#endif + + add t0.4s, v16.4s, v0.4s + mov dg0v.16b, dgav.16b + mov dg1v.16b, dgbv.16b + + add_update 0, v1, 16, 17, 18, 19 + add_update 1, v2, 17, 18, 19, 16 + add_update 0, v3, 18, 19, 16, 17 + add_update 1, v4, 19, 16, 17, 18 + + add_update 0, v5, 16, 17, 18, 19 + add_update 1, v6, 17, 18, 19, 16 + add_update 0, v7, 18, 19, 16, 17 + add_update 1, v8, 19, 16, 17, 18 + + add_update 0, v9, 16, 17, 18, 19 + add_update 1, v10, 17, 18, 19, 16 + add_update 0, v11, 18, 19, 16, 17 + add_update 1, v12, 19, 16, 17, 18 + + add_only 0, v13, 17 + add_only 1, v14, 18 + add_only 0, v15, 19 + add_only 1 + + /* update state */ + add dgav.4s, dgav.4s, dg0v.4s + add dgbv.4s, dgbv.4s, dg1v.4s + + /* store new state */ + st1 {dgav.4s, dgbv.4s}, [x1] + ret +#endif -- 2.52.0