[RFC,v2,14/16] RISC-V: crypto: add Zvkned accelerated AES encryption implementation

Message ID	20230228000544.2234136-15-heiko@sntech.de (mailing list archive)
State	Superseded
Headers	show Return-Path: <linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org> From: Heiko Stuebner <heiko@sntech.de> To: palmer@rivosinc.com Cc: greentime.hu@sifive.com, conor@kernel.org, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org, christoph.muellner@vrull.eu, heiko@sntech.de, Heiko Stuebner <heiko.stuebner@vrull.eu> Subject: [PATCH RFC v2 14/16] RISC-V: crypto: add Zvkned accelerated AES encryption implementation Date: Tue, 28 Feb 2023 01:05:42 +0100 Message-Id: <20230228000544.2234136-15-heiko@sntech.de> In-Reply-To: <20230228000544.2234136-1-heiko@sntech.de> References: <20230228000544.2234136-1-heiko@sntech.de> MIME-Version: 1.0 Precedence: list Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-riscv" <linux-riscv-bounces@lists.infradead.org> Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org
Series	RISC-V: support some cryptography accelerations \| expand [RFC,v2,00/16] RISC-V: support some cryptography accelerations [RFC,v2,01/16] riscv: Add support for kernel mode vector [RFC,v2,02/16] riscv: Add vector extension XOR implementation [RFC,v2,03/16] RISC-V: add Zbc extension detection [RFC,v2,04/16] RISC-V: add Zbkb extension detection [RFC,v2,05/16] RISC-V: hook new crypto subdir into build-system [RFC,v2,06/16] RISC-V: crypto: add accelerated GCM GHASH implementation [RFC,v2,07/16] RISC-V: add helper function to read the vector VLEN [RFC,v2,08/16] RISC-V: add vector crypto extension detection [RFC,v2,09/16] RISC-V: crypto: update perl include with helpers for vector (crypto) instructions [RFC,v2,10/16] RISC-V: crypto: add Zvkb accelerated GCM GHASH implementation [RFC,v2,11/16] RISC-V: crypto: add Zvkg accelerated GCM GHASH implementation [RFC,v2,12/16] RISC-V: crypto: add a vector-crypto-accelerated SHA256 implementation [RFC,v2,13/16] RISC-V: crypto: add a vector-crypto-accelerated SHA512 implementation [RFC,v2,14/16] RISC-V: crypto: add Zvkned accelerated AES encryption implementation [RFC,v2,15/16] RISC-V: crypto: add Zvksed accelerated SM4 encryption implementation [RFC,v2,16/16] RISC-V: crypto: add Zvksh accelerated SM3 hash implementation

Context	Check	Description
conchuod/tree_selection	fail	Failed to apply to next/pending-fixes or riscv/for-next

diff --git a/arch/riscv/crypto/Kconfig b/arch/riscv/crypto/Kconfig index da6244f0c0c4..c8abb29bb49b 100644 --- a/arch/riscv/crypto/Kconfig +++ b/arch/riscv/crypto/Kconfig @@ -2,6 +2,20 @@ menu "Accelerated Cryptographic Algorithms for CPU (riscv)" +config CRYPTO_AES_RISCV + tristate "Ciphers: AES (RISCV)" + depends on 64BIT && RISCV_ISA_V + select CRYPTO_AES + help + Block ciphers: AES cipher algorithms (FIPS-197) + Length-preserving ciphers: AES with ECB, CBC, CTR, CTS, + XCTR, and XTS modes + AEAD cipher: AES with CBC, ESSIV, and SHA-256 + for fscrypt and dm-crypt + + Architecture: riscv using one of + - Zvkns + config CRYPTO_GHASH_RISCV64 tristate "Hash functions: GHASH" depends on 64BIT && (RISCV_ISA_ZBC || RISCV_ISA_V) diff --git a/arch/riscv/crypto/Makefile b/arch/riscv/crypto/Makefile index 3c94753affdf..e5c702dff883 100644 --- a/arch/riscv/crypto/Makefile +++ b/arch/riscv/crypto/Makefile @@ -3,6 +3,9 @@ # linux/arch/riscv/crypto/Makefile # +obj-$(CONFIG_CRYPTO_AES_RISCV) += aes-riscv.o +aes-riscv-y := aes-riscv-glue.o aes-riscv64-zvkned.o + obj-$(CONFIG_CRYPTO_GHASH_RISCV64) += ghash-riscv64.o ghash-riscv64-y := ghash-riscv64-glue.o ifdef CONFIG_RISCV_ISA_ZBC @@ -21,6 +24,9 @@ sha512-riscv64-y := sha512-riscv64-glue.o sha512-riscv64-zvknhb.o quiet_cmd_perlasm = PERLASM $@ cmd_perlasm = $(PERL) $(<) void $(@) +$(obj)/aes-riscv64-zvkned.S: $(src)/aes-riscv64-zvkned.pl + $(call cmd,perlasm) + $(obj)/ghash-riscv64-zbc.S: $(src)/ghash-riscv64-zbc.pl $(call cmd,perlasm) @@ -36,5 +42,6 @@ $(obj)/sha256-riscv64-zvknhb.S: $(src)/sha256-riscv64-zvknha.pl $(obj)/sha512-riscv64-zvknhb.S: $(src)/sha512-riscv64-zvknhb.pl $(call cmd,perlasm) +clean-files += aes-riscv64-zvkned.S clean-files += ghash-riscv64-zbc.S ghash-riscv64-zvkb.S ghash-riscv64-zvkg.S clean-files += sha256-riscv64-zvknha.S sha512-riscv64-zvknhb.S diff --git a/arch/riscv/crypto/aes-riscv-glue.c b/arch/riscv/crypto/aes-riscv-glue.c new file mode 100644 index 000000000000..f0b73058bb54 --- /dev/null +++ b/arch/riscv/crypto/aes-riscv-glue.c @@ -0,0 +1,169 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Linux/riscv port of the OpenSSL AES implementation for RISCV + * + * Copyright (C) 2023 VRULL GmbH + * Author: Heiko Stuebner <heiko.stuebner@vrull.eu> + */ + +#include <linux/crypto.h> +#include <linux/delay.h> +#include <linux/err.h> +#include <linux/module.h> +#include <linux/types.h> +#include <asm/simd.h> +#include <asm/vector.h> +#include <crypto/aes.h> +#include <crypto/internal/cipher.h> +#include <crypto/internal/simd.h> + +struct aes_key { + u8 key[AES_MAX_KEYLENGTH]; + int rounds; +}; + +/* variant using the zvkned vector crypto extension */ +void rv64i_zvkned_encrypt(const u8 *in, u8 *out, const struct aes_key *key); +void rv64i_zvkned_decrypt(const u8 *in, u8 *out, const struct aes_key *key); +int rv64i_zvkned_set_encrypt_key(const u8 *userKey, const int bits, + struct aes_key *key); +int rv64i_zvkned_set_decrypt_key(const u8 *userKey, const int bits, + struct aes_key *key); + +struct riscv_aes_ctx { + struct crypto_cipher *fallback; + struct aes_key enc_key; + struct aes_key dec_key; + unsigned int keylen; +}; + +static int riscv64_aes_init_zvkned(struct crypto_tfm *tfm) +{ + struct riscv_aes_ctx *ctx = crypto_tfm_ctx(tfm); + const char *alg = crypto_tfm_alg_name(tfm); + struct crypto_cipher *fallback; + + fallback = crypto_alloc_cipher(alg, 0, CRYPTO_ALG_NEED_FALLBACK); + if (IS_ERR(fallback)) { + printk(KERN_ERR + "Failed to allocate transformation for '%s': %ld\n", + alg, PTR_ERR(fallback)); + return PTR_ERR(fallback); + } + + crypto_cipher_set_flags(fallback, + crypto_cipher_get_flags((struct + crypto_cipher *) + tfm)); + ctx->fallback = fallback; + + return 0; +} + +static void riscv_aes_exit(struct crypto_tfm *tfm) +{ + struct riscv_aes_ctx *ctx = crypto_tfm_ctx(tfm); + + if (ctx->fallback) { + crypto_free_cipher(ctx->fallback); + ctx->fallback = NULL; + } +} + +static int riscv64_aes_setkey_zvkned(struct crypto_tfm *tfm, const u8 *key, + unsigned int keylen) +{ + struct riscv_aes_ctx *ctx = crypto_tfm_ctx(tfm); + int ret; + + ctx->keylen = keylen; + + if (keylen == 16 || keylen == 32) { + kernel_rvv_begin(); + ret = rv64i_zvkned_set_encrypt_key(key, keylen * 8, &ctx->enc_key); + if (ret != 1) { + kernel_rvv_end(); + return -EINVAL; + } + + ret = rv64i_zvkned_set_decrypt_key(key, keylen * 8, &ctx->dec_key); + kernel_rvv_end(); + if (ret != 1) + return -EINVAL; + } + + ret = crypto_cipher_setkey(ctx->fallback, key, keylen); + + return ret ? -EINVAL : 0; +} + +static void riscv64_aes_encrypt_zvkned(struct crypto_tfm *tfm, u8 *dst, const u8 *src) +{ + struct riscv_aes_ctx *ctx = crypto_tfm_ctx(tfm); + + if (crypto_simd_usable() && (ctx->keylen == 16 || ctx->keylen == 32)) { + kernel_rvv_begin(); + rv64i_zvkned_encrypt(src, dst, &ctx->enc_key); + kernel_rvv_end(); + } else { + crypto_cipher_encrypt_one(ctx->fallback, dst, src); + } +} + +static void riscv64_aes_decrypt_zvkned(struct crypto_tfm *tfm, u8 *dst, const u8 *src) +{ + struct riscv_aes_ctx *ctx = crypto_tfm_ctx(tfm); + + if (crypto_simd_usable() && (ctx->keylen == 16 || ctx->keylen == 32)) { + kernel_rvv_begin(); + rv64i_zvkned_decrypt(src, dst, &ctx->dec_key); + kernel_rvv_end(); + } else { + crypto_cipher_decrypt_one(ctx->fallback, dst, src); + } +} + +struct crypto_alg riscv64_aes_zvkned_alg = { + .cra_name = "aes", + .cra_driver_name = "riscv-aes-zvkned", + .cra_module = THIS_MODULE, + .cra_priority = 300, + .cra_type = NULL, + .cra_flags = CRYPTO_ALG_TYPE_CIPHER | CRYPTO_ALG_NEED_FALLBACK, + .cra_alignmask = 0, + .cra_blocksize = AES_BLOCK_SIZE, + .cra_ctxsize = sizeof(struct riscv_aes_ctx), + .cra_init = riscv64_aes_init_zvkned, + .cra_exit = riscv_aes_exit, + .cra_cipher = { + .cia_min_keysize = AES_MIN_KEY_SIZE, + .cia_max_keysize = AES_MAX_KEY_SIZE, + .cia_setkey = riscv64_aes_setkey_zvkned, + .cia_encrypt = riscv64_aes_encrypt_zvkned, + .cia_decrypt = riscv64_aes_decrypt_zvkned, + }, +}; + +static int __init riscv_aes_mod_init(void) +{ + if (riscv_isa_extension_available(NULL, ZVKNED) && + riscv_vector_vlen() >= 128) + return crypto_register_alg(&riscv64_aes_zvkned_alg); + + return 0; +} + +static void __exit riscv_aes_mod_fini(void) +{ + if (riscv_isa_extension_available(NULL, ZVKNED) && + riscv_vector_vlen() >= 128) + return crypto_unregister_alg(&riscv64_aes_zvkned_alg); +} + +module_init(riscv_aes_mod_init); +module_exit(riscv_aes_mod_fini); + +MODULE_DESCRIPTION("AES (accelerated)"); +MODULE_AUTHOR("Heiko Stuebner <heiko.stuebner@vrull.eu>"); +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS_CRYPTO("aes"); diff --git a/arch/riscv/crypto/aes-riscv64-zvkned.pl b/arch/riscv/crypto/aes-riscv64-zvkned.pl new file mode 100644 index 000000000000..176588723220 --- /dev/null +++ b/arch/riscv/crypto/aes-riscv64-zvkned.pl @@ -0,0 +1,500 @@ +#! /usr/bin/env perl +# Copyright 2023 The OpenSSL Project Authors. All Rights Reserved. +# +# Licensed under the Apache License 2.0 (the "License"). You may not use +# this file except in compliance with the License. You can obtain a copy +# in the file LICENSE in the source distribution or at +# https://www.openssl.org/source/license.html + +# - RV64I +# - RISC-V vector ('V') with VLEN >= 128 +# - RISC-V vector crypto AES extension ('Zvkned') + +use strict; +use warnings; + +use FindBin qw($Bin); +use lib "$Bin"; +use lib "$Bin/../../perlasm"; +use riscv; + +# $output is the last argument if it looks like a file (it has an extension) +# $flavour is the first argument if it doesn't look like a file +my $output = $#ARGV >= 0 && $ARGV[$#ARGV] =~ m|\.\w+$| ? pop : undef; +my $flavour = $#ARGV >= 0 && $ARGV[0] !~ m|\.| ? shift : undef; + +$output and open STDOUT,">$output"; + +my $code=<<___; +.text +___ + +################################################################################ +# int rv64i_zvkned_set_encrypt_key(const unsigned char *userKey, const int bits, +# AES_KEY *key) +# int rv64i_zvkned_set_decrypt_key(const unsigned char *userKey, const int bits, +# AES_KEY *key) +{ +my ($UKEY,$BITS,$KEYP) = ("a0", "a1", "a2"); +my ($T0,$T1,$T4) = ("t1", "t2", "t4"); +my ($v0, $v1, $v2, $v3, $v4, $v5, $v6, + $v7, $v8, $v9, $v10, $v11, $v12, + $v13, $v14, $v15, $v16, $v17, $v18, + $v19, $v20, $v21, $v22, $v23, $v24, +) = map("v$_",(0..24)); + +$code .= <<___; +.p2align 3 +.globl rv64i_zvkned_set_encrypt_key +.type rv64i_zvkned_set_encrypt_key,\@function +rv64i_zvkned_set_encrypt_key: + beqz $UKEY, L_fail_m1 + beqz $KEYP, L_fail_m1 + + # Get proper routine for key size + li $T0, 256 + beq $BITS, $T0, L_set_key_256 + li $T0, 128 + beq $BITS, $T0, L_set_key_128 + + j L_fail_m2 + +.size rv64i_zvkned_set_encrypt_key,.-rv64i_zvkned_set_encrypt_key +___ + +$code .= <<___; +.p2align 3 +.globl rv64i_zvkned_set_decrypt_key +.type rv64i_zvkned_set_decrypt_key,\@function +rv64i_zvkned_set_decrypt_key: + beqz $UKEY, L_fail_m1 + beqz $KEYP, L_fail_m1 + + # Get proper routine for key size + li $T0, 256 + beq $BITS, $T0, L_set_key_256 + li $T0, 128 + beq $BITS, $T0, L_set_key_128 + + j L_fail_m2 + +.size rv64i_zvkned_set_decrypt_key,.-rv64i_zvkned_set_decrypt_key +___ + +$code .= <<___; +.p2align 3 +L_set_key_128: + # Store the number of rounds + li $T1, 10 + sw $T1, 240($KEYP) + + @{[vsetivli__x0_4_e32_m1_ta_ma]} + + # Load the key + @{[vle32_v $v10, ($UKEY)]} + + # Generate keys for round 2-11 into registers v11-v20. + @{[vaeskf1_vi $v11, $v10, 1]} # v11 <- rk2 (w[ 4, 7]) + @{[vaeskf1_vi $v12, $v11, 2]} # v12 <- rk3 (w[ 8,11]) + @{[vaeskf1_vi $v13, $v12, 3]} # v13 <- rk4 (w[12,15]) + @{[vaeskf1_vi $v14, $v13, 4]} # v14 <- rk5 (w[16,19]) + @{[vaeskf1_vi $v15, $v14, 5]} # v15 <- rk6 (w[20,23]) + @{[vaeskf1_vi $v16, $v15, 6]} # v16 <- rk7 (w[24,27]) + @{[vaeskf1_vi $v17, $v16, 7]} # v17 <- rk8 (w[28,31]) + @{[vaeskf1_vi $v18, $v17, 8]} # v18 <- rk9 (w[32,35]) + @{[vaeskf1_vi $v19, $v18, 9]} # v19 <- rk10 (w[36,39]) + @{[vaeskf1_vi $v20, $v19, 10]} # v20 <- rk11 (w[40,43]) + + # Store the round keys + @{[vse32_v $v10, ($KEYP)]} + addi $KEYP, $KEYP, 16 + @{[vse32_v $v11, ($KEYP)]} + addi $KEYP, $KEYP, 16 + @{[vse32_v $v12, ($KEYP)]} + addi $KEYP, $KEYP, 16 + @{[vse32_v $v13, ($KEYP)]} + addi $KEYP, $KEYP, 16 + @{[vse32_v $v14, ($KEYP)]} + addi $KEYP, $KEYP, 16 + @{[vse32_v $v15, ($KEYP)]} + addi $KEYP, $KEYP, 16 + @{[vse32_v $v16, ($KEYP)]} + addi $KEYP, $KEYP, 16 + @{[vse32_v $v17, ($KEYP)]} + addi $KEYP, $KEYP, 16 + @{[vse32_v $v18, ($KEYP)]} + addi $KEYP, $KEYP, 16 + @{[vse32_v $v19, ($KEYP)]} + addi $KEYP, $KEYP, 16 + @{[vse32_v $v20, ($KEYP)]} + + li a0, 1 + ret +.size L_set_key_128,.-L_set_key_128 +___ + +$code .= <<___; +.p2align 3 +L_set_key_256: + # Store the number of rounds + li $T1, 14 + sw $T1, 240($KEYP) + + @{[vsetivli__x0_4_e32_m1_ta_ma]} + + # Load the key + @{[vle32_v $v10, ($UKEY)]} + addi $UKEY, $UKEY, 16 + @{[vle32_v $v11, ($UKEY)]} + + @{[vmv_v_v $v12, $v10]} + @{[vaeskf2_vi $v12, $v11, 1]} + @{[vmv_v_v $v13, $v11]} + @{[vaeskf2_vi $v13, $v12, 2]} + @{[vmv_v_v $v14, $v12]} + @{[vaeskf2_vi $v14, $v13, 3]} + @{[vmv_v_v $v15, $v13]} + @{[vaeskf2_vi $v15, $v14, 4]} + @{[vmv_v_v $v16, $v14]} + @{[vaeskf2_vi $v16, $v15, 5]} + @{[vmv_v_v $v17, $v15]} + @{[vaeskf2_vi $v17, $v16, 6]} + @{[vmv_v_v $v18, $v16]} + @{[vaeskf2_vi $v18, $v17, 7]} + @{[vmv_v_v $v19, $v17]} + @{[vaeskf2_vi $v19, $v18, 8]} + @{[vmv_v_v $v20, $v18]} + @{[vaeskf2_vi $v20, $v19, 9]} + @{[vmv_v_v $v21, $v19]} + @{[vaeskf2_vi $v21, $v20, 10]} + @{[vmv_v_v $v22, $v20]} + @{[vaeskf2_vi $v22, $v21, 11]} + @{[vmv_v_v $v23, $v21]} + @{[vaeskf2_vi $v23, $v22, 12]} + @{[vmv_v_v $v24, $v22]} + @{[vaeskf2_vi $v24, $v23, 13]} + + @{[vse32_v $v10, ($KEYP)]} + addi $KEYP, $KEYP, 16 + @{[vse32_v $v11, ($KEYP)]} + addi $KEYP, $KEYP, 16 + @{[vse32_v $v12, ($KEYP)]} + addi $KEYP, $KEYP, 16 + @{[vse32_v $v13, ($KEYP)]} + addi $KEYP, $KEYP, 16 + @{[vse32_v $v14, ($KEYP)]} + addi $KEYP, $KEYP, 16 + @{[vse32_v $v15, ($KEYP)]} + addi $KEYP, $KEYP, 16 + @{[vse32_v $v16, ($KEYP)]} + addi $KEYP, $KEYP, 16 + @{[vse32_v $v17, ($KEYP)]} + addi $KEYP, $KEYP, 16 + @{[vse32_v $v18, ($KEYP)]} + addi $KEYP, $KEYP, 16 + @{[vse32_v $v19, ($KEYP)]} + addi $KEYP, $KEYP, 16 + @{[vse32_v $v20, ($KEYP)]} + addi $KEYP, $KEYP, 16 + @{[vse32_v $v21, ($KEYP)]} + addi $KEYP, $KEYP, 16 + @{[vse32_v $v22, ($KEYP)]} + addi $KEYP, $KEYP, 16 + @{[vse32_v $v23, ($KEYP)]} + addi $KEYP, $KEYP, 16 + @{[vse32_v $v24, ($KEYP)]} + + li a0, 1 + ret +.size L_set_key_256,.-L_set_key_256 +___ +} + +################################################################################ +# void rv64i_zvkned_encrypt(const unsigned char *in, unsigned char *out, +# const AES_KEY *key); +{ +my ($INP,$OUTP,$KEYP) = ("a0", "a1", "a2"); +my ($T0,$T1, $rounds, $T6) = ("a3", "a4", "t5", "t6"); +my ($v0, $v1, $v2, $v3, $v4, $v5, $v6, + $v7, $v8, $v9, $v10, $v11, $v12, + $v13, $v14, $v15, $v16, $v17, $v18, + $v19, $v20, $v21, $v22, $v23, $v24, +) = map("v$_",(0..24)); + +$code .= <<___; +.p2align 3 +.globl rv64i_zvkned_encrypt +.type rv64i_zvkned_encrypt,\@function +rv64i_zvkned_encrypt: + # Load number of rounds + lwu $rounds, 240($KEYP) + + # Get proper routine for key size + li $T6, 14 + beq $rounds, $T6, L_enc_256 + li $T6, 10 + beq $rounds, $T6, L_enc_128 + + j L_fail_m2 +.size rv64i_zvkned_encrypt,.-rv64i_zvkned_encrypt +___ + +$code .= <<___; +.p2align 3 +L_enc_128: + @{[vsetivli__x0_4_e32_m1_ta_ma]} + + @{[vle32_v $v10, ($KEYP)]} + addi $KEYP, $KEYP, 16 + @{[vle32_v $v11, ($KEYP)]} + addi $KEYP, $KEYP, 16 + @{[vle32_v $v12, ($KEYP)]} + addi $KEYP, $KEYP, 16 + @{[vle32_v $v13, ($KEYP)]} + addi $KEYP, $KEYP, 16 + @{[vle32_v $v14, ($KEYP)]} + addi $KEYP, $KEYP, 16 + @{[vle32_v $v15, ($KEYP)]} + addi $KEYP, $KEYP, 16 + @{[vle32_v $v16, ($KEYP)]} + addi $KEYP, $KEYP, 16 + @{[vle32_v $v17, ($KEYP)]} + addi $KEYP, $KEYP, 16 + @{[vle32_v $v18, ($KEYP)]} + addi $KEYP, $KEYP, 16 + @{[vle32_v $v19, ($KEYP)]} + addi $KEYP, $KEYP, 16 + @{[vle32_v $v20, ($KEYP)]} + + @{[vle32_v $v1, ($INP)]} + + @{[vaesz_vs $v1, $v10]} # with round key w[ 0, 3] + @{[vaesem_vs $v1, $v11]} # with round key w[ 4, 7] + @{[vaesem_vs $v1, $v12]} # with round key w[ 8,11] + @{[vaesem_vs $v1, $v13]} # with round key w[12,15] + @{[vaesem_vs $v1, $v14]} # with round key w[16,19] + @{[vaesem_vs $v1, $v15]} # with round key w[20,23] + @{[vaesem_vs $v1, $v16]} # with round key w[24,27] + @{[vaesem_vs $v1, $v17]} # with round key w[28,31] + @{[vaesem_vs $v1, $v18]} # with round key w[32,35] + @{[vaesem_vs $v1, $v19]} # with round key w[36,39] + @{[vaesef_vs $v1, $v20]} # with round key w[40,43] + + @{[vse32_v $v1, ($OUTP)]} + + ret +.size L_enc_128,.-L_enc_128 +___ + +$code .= <<___; +.p2align 3 +L_enc_256: + @{[vsetivli__x0_4_e32_m1_ta_ma]} + + @{[vle32_v $v10, ($KEYP)]} + addi $KEYP, $KEYP, 16 + @{[vle32_v $v11, ($KEYP)]} + addi $KEYP, $KEYP, 16 + @{[vle32_v $v12, ($KEYP)]} + addi $KEYP, $KEYP, 16 + @{[vle32_v $v13, ($KEYP)]} + addi $KEYP, $KEYP, 16 + @{[vle32_v $v14, ($KEYP)]} + addi $KEYP, $KEYP, 16 + @{[vle32_v $v15, ($KEYP)]} + addi $KEYP, $KEYP, 16 + @{[vle32_v $v16, ($KEYP)]} + addi $KEYP, $KEYP, 16 + @{[vle32_v $v17, ($KEYP)]} + addi $KEYP, $KEYP, 16 + @{[vle32_v $v18, ($KEYP)]} + addi $KEYP, $KEYP, 16 + @{[vle32_v $v19, ($KEYP)]} + addi $KEYP, $KEYP, 16 + @{[vle32_v $v20, ($KEYP)]} + addi $KEYP, $KEYP, 16 + @{[vle32_v $v21, ($KEYP)]} + addi $KEYP, $KEYP, 16 + @{[vle32_v $v22, ($KEYP)]} + addi $KEYP, $KEYP, 16 + @{[vle32_v $v23, ($KEYP)]} + addi $KEYP, $KEYP, 16 + @{[vle32_v $v24, ($KEYP)]} + + @{[vle32_v $v1, ($INP)]} + + @{[vaesz_vs $v1, $v10]} # with round key w[ 0, 3] + @{[vaesem_vs $v1, $v11]} + @{[vaesem_vs $v1, $v12]} + @{[vaesem_vs $v1, $v13]} + @{[vaesem_vs $v1, $v14]} + @{[vaesem_vs $v1, $v15]} + @{[vaesem_vs $v1, $v16]} + @{[vaesem_vs $v1, $v17]} + @{[vaesem_vs $v1, $v18]} + @{[vaesem_vs $v1, $v19]} + @{[vaesem_vs $v1, $v20]} + @{[vaesem_vs $v1, $v21]} + @{[vaesem_vs $v1, $v22]} + @{[vaesem_vs $v1, $v23]} + @{[vaesef_vs $v1, $v24]} + + @{[vse32_v $v1, ($OUTP)]} + ret +.size L_enc_256,.-L_enc_256 +___ +} + +################################################################################ +# void rv64i_zvkned_decrypt(const unsigned char *in, unsigned char *out, +# const AES_KEY *key); +{ +my ($INP,$OUTP,$KEYP) = ("a0", "a1", "a2"); +my ($T0,$T1, $rounds, $T6) = ("a3", "a4", "t5", "t6"); +my ($v0, $v1, $v2, $v3, $v4, $v5, $v6, + $v7, $v8, $v9, $v10, $v11, $v12, + $v13, $v14, $v15, $v16, $v17, $v18, + $v19, $v20, $v21, $v22, $v23, $v24, +) = map("v$_",(0..24)); + +$code .= <<___; +.p2align 3 +.globl rv64i_zvkned_decrypt +.type rv64i_zvkned_decrypt,\@function +rv64i_zvkned_decrypt: + # Load number of rounds + lwu $rounds, 240($KEYP) + + # Get proper routine for key size + li $T6, 14 + beq $rounds, $T6, L_dec_256 + li $T6, 10 + beq $rounds, $T6, L_dec_128 + + j L_fail_m2 +.size rv64i_zvkned_decrypt,.-rv64i_zvkned_decrypt +___ + +$code .= <<___; +.p2align 3 +L_dec_128: + @{[vsetivli__x0_4_e32_m1_ta_ma]} + + @{[vle32_v $v10, ($KEYP)]} + addi $KEYP, $KEYP, 16 + @{[vle32_v $v11, ($KEYP)]} + addi $KEYP, $KEYP, 16 + @{[vle32_v $v12, ($KEYP)]} + addi $KEYP, $KEYP, 16 + @{[vle32_v $v13, ($KEYP)]} + addi $KEYP, $KEYP, 16 + @{[vle32_v $v14, ($KEYP)]} + addi $KEYP, $KEYP, 16 + @{[vle32_v $v15, ($KEYP)]} + addi $KEYP, $KEYP, 16 + @{[vle32_v $v16, ($KEYP)]} + addi $KEYP, $KEYP, 16 + @{[vle32_v $v17, ($KEYP)]} + addi $KEYP, $KEYP, 16 + @{[vle32_v $v18, ($KEYP)]} + addi $KEYP, $KEYP, 16 + @{[vle32_v $v19, ($KEYP)]} + addi $KEYP, $KEYP, 16 + @{[vle32_v $v20, ($KEYP)]} + + @{[vle32_v $v1, ($INP)]} + + @{[vaesz_vs $v1, $v20]} # with round key w[43,47] + @{[vaesdm_vs $v1, $v19]} # with round key w[36,39] + @{[vaesdm_vs $v1, $v18]} # with round key w[32,35] + @{[vaesdm_vs $v1, $v17]} # with round key w[28,31] + @{[vaesdm_vs $v1, $v16]} # with round key w[24,27] + @{[vaesdm_vs $v1, $v15]} # with round key w[20,23] + @{[vaesdm_vs $v1, $v14]} # with round key w[16,19] + @{[vaesdm_vs $v1, $v13]} # with round key w[12,15] + @{[vaesdm_vs $v1, $v12]} # with round key w[ 8,11] + @{[vaesdm_vs $v1, $v11]} # with round key w[ 4, 7] + @{[vaesdf_vs $v1, $v10]} # with round key w[ 0, 3] + + @{[vse32_v $v1, ($OUTP)]} + + ret +.size L_dec_128,.-L_dec_128 +___ + +$code .= <<___; +.p2align 3 +L_dec_256: + @{[vsetivli__x0_4_e32_m1_ta_ma]} + + @{[vle32_v $v10, ($KEYP)]} + addi $KEYP, $KEYP, 16 + @{[vle32_v $v11, ($KEYP)]} + addi $KEYP, $KEYP, 16 + @{[vle32_v $v12, ($KEYP)]} + addi $KEYP, $KEYP, 16 + @{[vle32_v $v13, ($KEYP)]} + addi $KEYP, $KEYP, 16 + @{[vle32_v $v14, ($KEYP)]} + addi $KEYP, $KEYP, 16 + @{[vle32_v $v15, ($KEYP)]} + addi $KEYP, $KEYP, 16 + @{[vle32_v $v16, ($KEYP)]} + addi $KEYP, $KEYP, 16 + @{[vle32_v $v17, ($KEYP)]} + addi $KEYP, $KEYP, 16 + @{[vle32_v $v18, ($KEYP)]} + addi $KEYP, $KEYP, 16 + @{[vle32_v $v19, ($KEYP)]} + addi $KEYP, $KEYP, 16 + @{[vle32_v $v20, ($KEYP)]} + addi $KEYP, $KEYP, 16 + @{[vle32_v $v21, ($KEYP)]} + addi $KEYP, $KEYP, 16 + @{[vle32_v $v22, ($KEYP)]} + addi $KEYP, $KEYP, 16 + @{[vle32_v $v23, ($KEYP)]} + addi $KEYP, $KEYP, 16 + @{[vle32_v $v24, ($KEYP)]} + + @{[vle32_v $v1, ($INP)]} + + @{[vaesz_vs $v1, $v24]} # with round key w[56,59] + @{[vaesdm_vs $v1, $v23]} # with round key w[52,55] + @{[vaesdm_vs $v1, $v22]} # with round key w[48,51] + @{[vaesdm_vs $v1, $v21]} # with round key w[44,47] + @{[vaesdm_vs $v1, $v20]} # with round key w[40,43] + @{[vaesdm_vs $v1, $v19]} # with round key w[36,39] + @{[vaesdm_vs $v1, $v18]} # with round key w[32,35] + @{[vaesdm_vs $v1, $v17]} # with round key w[28,31] + @{[vaesdm_vs $v1, $v16]} # with round key w[24,27] + @{[vaesdm_vs $v1, $v15]} # with round key w[20,23] + @{[vaesdm_vs $v1, $v14]} # with round key w[16,19] + @{[vaesdm_vs $v1, $v13]} # with round key w[12,15] + @{[vaesdm_vs $v1, $v12]} # with round key w[ 8,11] + @{[vaesdm_vs $v1, $v11]} # with round key w[ 4, 7] + @{[vaesdf_vs $v1, $v10]} # with round key w[ 0, 3] + + @{[vse32_v $v1, ($OUTP)]} + + ret +.size L_dec_256,.-L_dec_256 +___ +} + +$code .= <<___; +L_fail_m1: + li a0, -1 + ret +.size L_fail_m1,.-L_fail_m1 + +L_fail_m2: + li a0, -2 + ret +.size L_fail_m2,.-L_fail_m2 +___ + +print $code; + +close STDOUT or die "error closing STDOUT: $!";

[RFC,v2,14/16] RISC-V: crypto: add Zvkned accelerated AES encryption implementation

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