From 006d0624fa0d71787448cacee0195bf20f2d47c8 Mon Sep 17 00:00:00 2001 From: Ard Biesheuvel Date: Tue, 10 Mar 2015 09:47:46 +0100 Subject: [PATCH] crypto: arm - add support for SHA-224/256 using ARMv8 Crypto Extensions This implements the SHA-224/256 secure hash algorithm using the AArch32 versions of the ARMv8 Crypto Extensions for SHA2. Signed-off-by: Ard Biesheuvel Signed-off-by: Herbert Xu --- arch/arm/crypto/Kconfig | 9 ++ arch/arm/crypto/Makefile | 2 + arch/arm/crypto/sha2-ce-core.S | 134 ++++++++++++++++++++++ arch/arm/crypto/sha2-ce-glue.c | 203 +++++++++++++++++++++++++++++++++ 4 files changed, 348 insertions(+) create mode 100644 arch/arm/crypto/sha2-ce-core.S create mode 100644 arch/arm/crypto/sha2-ce-glue.c diff --git a/arch/arm/crypto/Kconfig b/arch/arm/crypto/Kconfig index d7bc10beb8ac..9c1478e55a40 100644 --- a/arch/arm/crypto/Kconfig +++ b/arch/arm/crypto/Kconfig @@ -37,6 +37,15 @@ config CRYPTO_SHA1_ARM_CE SHA-1 secure hash standard (FIPS 180-1/DFIPS 180-2) implemented using special ARMv8 Crypto Extensions. +config CRYPTO_SHA2_ARM_CE + tristate "SHA-224/256 digest algorithm (ARM v8 Crypto Extensions)" + depends on KERNEL_MODE_NEON + select CRYPTO_SHA256 + select CRYPTO_HASH + help + SHA-256 secure hash standard (DFIPS 180-2) implemented + using special ARMv8 Crypto Extensions. + config CRYPTO_SHA512_ARM_NEON tristate "SHA384 and SHA512 digest algorithm (ARM NEON)" depends on KERNEL_MODE_NEON diff --git a/arch/arm/crypto/Makefile b/arch/arm/crypto/Makefile index d92d05ba646e..4ea9f96c2782 100644 --- a/arch/arm/crypto/Makefile +++ b/arch/arm/crypto/Makefile @@ -8,6 +8,7 @@ obj-$(CONFIG_CRYPTO_SHA1_ARM) += sha1-arm.o obj-$(CONFIG_CRYPTO_SHA1_ARM_NEON) += sha1-arm-neon.o obj-$(CONFIG_CRYPTO_SHA512_ARM_NEON) += sha512-arm-neon.o obj-$(CONFIG_CRYPTO_SHA1_ARM_CE) += sha1-arm-ce.o +obj-$(CONFIG_CRYPTO_SHA2_ARM_CE) += sha2-arm-ce.o aes-arm-y := aes-armv4.o aes_glue.o aes-arm-bs-y := aesbs-core.o aesbs-glue.o @@ -15,6 +16,7 @@ sha1-arm-y := sha1-armv4-large.o sha1_glue.o sha1-arm-neon-y := sha1-armv7-neon.o sha1_neon_glue.o sha512-arm-neon-y := sha512-armv7-neon.o sha512_neon_glue.o sha1-arm-ce-y := sha1-ce-core.o sha1-ce-glue.o +sha2-arm-ce-y := sha2-ce-core.o sha2-ce-glue.o quiet_cmd_perl = PERL $@ cmd_perl = $(PERL) $(<) > $(@) diff --git a/arch/arm/crypto/sha2-ce-core.S b/arch/arm/crypto/sha2-ce-core.S new file mode 100644 index 000000000000..96af09fe957b --- /dev/null +++ b/arch/arm/crypto/sha2-ce-core.S @@ -0,0 +1,134 @@ +/* + * sha2-ce-core.S - SHA-224/256 secure hash using ARMv8 Crypto Extensions + * + * Copyright (C) 2015 Linaro Ltd. + * Author: Ard Biesheuvel + * + * 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 +#include + + .text + .fpu crypto-neon-fp-armv8 + + k0 .req q7 + k1 .req q8 + rk .req r3 + + ta0 .req q9 + ta1 .req q10 + tb0 .req q10 + tb1 .req q9 + + dga .req q11 + dgb .req q12 + + dg0 .req q13 + dg1 .req q14 + dg2 .req q15 + + .macro add_only, ev, s0 + vmov dg2, dg0 + .ifnb \s0 + vld1.32 {k\ev}, [rk, :128]! + .endif + sha256h.32 dg0, dg1, tb\ev + sha256h2.32 dg1, dg2, tb\ev + .ifnb \s0 + vadd.u32 ta\ev, q\s0, k\ev + .endif + .endm + + .macro add_update, ev, s0, s1, s2, s3 + sha256su0.32 q\s0, q\s1 + add_only \ev, \s1 + sha256su1.32 q\s0, q\s2, q\s3 + .endm + + .align 6 +.Lsha256_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 + + /* + * void sha2_ce_transform(int blocks, u8 const *src, u32 *state, + * u8 *head); + */ +ENTRY(sha2_ce_transform) + /* load state */ + vld1.32 {dga-dgb}, [r2] + + /* load partial input (if supplied) */ + teq r3, #0 + beq 0f + vld1.32 {q0-q1}, [r3]! + vld1.32 {q2-q3}, [r3] + teq r0, #0 + b 1f + + /* load input */ +0: vld1.32 {q0-q1}, [r1]! + vld1.32 {q2-q3}, [r1]! + subs r0, r0, #1 + +1: +#ifndef CONFIG_CPU_BIG_ENDIAN + vrev32.8 q0, q0 + vrev32.8 q1, q1 + vrev32.8 q2, q2 + vrev32.8 q3, q3 +#endif + + /* load first round constant */ + adr rk, .Lsha256_rcon + vld1.32 {k0}, [rk, :128]! + + vadd.u32 ta0, q0, k0 + vmov dg0, dga + vmov dg1, dgb + + add_update 1, 0, 1, 2, 3 + add_update 0, 1, 2, 3, 0 + add_update 1, 2, 3, 0, 1 + add_update 0, 3, 0, 1, 2 + add_update 1, 0, 1, 2, 3 + add_update 0, 1, 2, 3, 0 + add_update 1, 2, 3, 0, 1 + add_update 0, 3, 0, 1, 2 + add_update 1, 0, 1, 2, 3 + add_update 0, 1, 2, 3, 0 + add_update 1, 2, 3, 0, 1 + add_update 0, 3, 0, 1, 2 + + add_only 1, 1 + add_only 0, 2 + add_only 1, 3 + add_only 0 + + /* update state */ + vadd.u32 dga, dga, dg0 + vadd.u32 dgb, dgb, dg1 + bne 0b + + /* store new state */ + vst1.32 {dga-dgb}, [r2] + bx lr +ENDPROC(sha2_ce_transform) diff --git a/arch/arm/crypto/sha2-ce-glue.c b/arch/arm/crypto/sha2-ce-glue.c new file mode 100644 index 000000000000..9ffe8ad27402 --- /dev/null +++ b/arch/arm/crypto/sha2-ce-glue.c @@ -0,0 +1,203 @@ +/* + * sha2-ce-glue.c - SHA-224/SHA-256 using ARMv8 Crypto Extensions + * + * Copyright (C) 2015 Linaro Ltd + * + * 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 +#include +#include +#include + +#include +#include +#include +#include + +MODULE_DESCRIPTION("SHA-224/SHA-256 secure hash using ARMv8 Crypto Extensions"); +MODULE_AUTHOR("Ard Biesheuvel "); +MODULE_LICENSE("GPL v2"); + +asmlinkage void sha2_ce_transform(int blocks, u8 const *src, u32 *state, + u8 *head); + +static int sha224_init(struct shash_desc *desc) +{ + struct sha256_state *sctx = shash_desc_ctx(desc); + + *sctx = (struct sha256_state){ + .state = { + SHA224_H0, SHA224_H1, SHA224_H2, SHA224_H3, + SHA224_H4, SHA224_H5, SHA224_H6, SHA224_H7, + } + }; + return 0; +} + +static int sha256_init(struct shash_desc *desc) +{ + struct sha256_state *sctx = shash_desc_ctx(desc); + + *sctx = (struct sha256_state){ + .state = { + SHA256_H0, SHA256_H1, SHA256_H2, SHA256_H3, + SHA256_H4, SHA256_H5, SHA256_H6, SHA256_H7, + } + }; + return 0; +} + +static int sha2_update(struct shash_desc *desc, const u8 *data, + unsigned int len) +{ + struct sha256_state *sctx = shash_desc_ctx(desc); + unsigned int partial; + + if (!may_use_simd()) + return crypto_sha256_update(desc, data, len); + + partial = sctx->count % SHA256_BLOCK_SIZE; + sctx->count += len; + + if ((partial + len) >= SHA256_BLOCK_SIZE) { + int blocks; + + if (partial) { + int p = SHA256_BLOCK_SIZE - partial; + + memcpy(sctx->buf + partial, data, p); + data += p; + len -= p; + } + + blocks = len / SHA256_BLOCK_SIZE; + len %= SHA256_BLOCK_SIZE; + + kernel_neon_begin(); + sha2_ce_transform(blocks, data, sctx->state, + partial ? sctx->buf : NULL); + kernel_neon_end(); + + data += blocks * SHA256_BLOCK_SIZE; + partial = 0; + } + if (len) + memcpy(sctx->buf + partial, data, len); + return 0; +} + +static void sha2_final(struct shash_desc *desc) +{ + static const u8 padding[SHA256_BLOCK_SIZE] = { 0x80, }; + + struct sha256_state *sctx = shash_desc_ctx(desc); + __be64 bits = cpu_to_be64(sctx->count << 3); + u32 padlen = SHA256_BLOCK_SIZE + - ((sctx->count + sizeof(bits)) % SHA256_BLOCK_SIZE); + + sha2_update(desc, padding, padlen); + sha2_update(desc, (const u8 *)&bits, sizeof(bits)); +} + +static int sha224_final(struct shash_desc *desc, u8 *out) +{ + struct sha256_state *sctx = shash_desc_ctx(desc); + __be32 *dst = (__be32 *)out; + int i; + + sha2_final(desc); + + for (i = 0; i < SHA224_DIGEST_SIZE / sizeof(__be32); i++) + put_unaligned_be32(sctx->state[i], dst++); + + *sctx = (struct sha256_state){}; + return 0; +} + +static int sha256_final(struct shash_desc *desc, u8 *out) +{ + struct sha256_state *sctx = shash_desc_ctx(desc); + __be32 *dst = (__be32 *)out; + int i; + + sha2_final(desc); + + for (i = 0; i < SHA256_DIGEST_SIZE / sizeof(__be32); i++) + put_unaligned_be32(sctx->state[i], dst++); + + *sctx = (struct sha256_state){}; + return 0; +} + +static int sha2_export(struct shash_desc *desc, void *out) +{ + struct sha256_state *sctx = shash_desc_ctx(desc); + struct sha256_state *dst = out; + + *dst = *sctx; + return 0; +} + +static int sha2_import(struct shash_desc *desc, const void *in) +{ + struct sha256_state *sctx = shash_desc_ctx(desc); + struct sha256_state const *src = in; + + *sctx = *src; + return 0; +} + +static struct shash_alg algs[] = { { + .init = sha224_init, + .update = sha2_update, + .final = sha224_final, + .export = sha2_export, + .import = sha2_import, + .descsize = sizeof(struct sha256_state), + .digestsize = SHA224_DIGEST_SIZE, + .statesize = sizeof(struct sha256_state), + .base = { + .cra_name = "sha224", + .cra_driver_name = "sha224-ce", + .cra_priority = 200, + .cra_flags = CRYPTO_ALG_TYPE_SHASH, + .cra_blocksize = SHA256_BLOCK_SIZE, + .cra_module = THIS_MODULE, + } +}, { + .init = sha256_init, + .update = sha2_update, + .final = sha256_final, + .export = sha2_export, + .import = sha2_import, + .descsize = sizeof(struct sha256_state), + .digestsize = SHA256_DIGEST_SIZE, + .statesize = sizeof(struct sha256_state), + .base = { + .cra_name = "sha256", + .cra_driver_name = "sha256-ce", + .cra_priority = 200, + .cra_flags = CRYPTO_ALG_TYPE_SHASH, + .cra_blocksize = SHA256_BLOCK_SIZE, + .cra_module = THIS_MODULE, + } +} }; + +static int __init sha2_ce_mod_init(void) +{ + if (!(elf_hwcap2 & HWCAP2_SHA2)) + return -ENODEV; + return crypto_register_shashes(algs, ARRAY_SIZE(algs)); +} + +static void __exit sha2_ce_mod_fini(void) +{ + crypto_unregister_shashes(algs, ARRAY_SIZE(algs)); +} + +module_init(sha2_ce_mod_init); +module_exit(sha2_ce_mod_fini); -- 2.20.1