mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-14 18:56:55 +07:00
arm64/crypto: SHA-1 using ARMv8 Crypto Extensions
This patch adds support for the SHA-1 Secure Hash Algorithm for CPUs that have support for the SHA-1 part of the ARM v8 Crypto Extensions. Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Ard Biesheuvel
parent
190f1ca85d
commit
2c98833a42
@ -342,5 +342,8 @@ source "arch/arm64/Kconfig.debug"
|
||||
source "security/Kconfig"
|
||||
|
||||
source "crypto/Kconfig"
|
||||
if CRYPTO
|
||||
source "arch/arm64/crypto/Kconfig"
|
||||
endif
|
||||
|
||||
source "lib/Kconfig"
|
||||
|
||||
@ -45,6 +45,7 @@ export TEXT_OFFSET GZFLAGS
|
||||
core-y += arch/arm64/kernel/ arch/arm64/mm/
|
||||
core-$(CONFIG_KVM) += arch/arm64/kvm/
|
||||
core-$(CONFIG_XEN) += arch/arm64/xen/
|
||||
core-$(CONFIG_CRYPTO) += arch/arm64/crypto/
|
||||
libs-y := arch/arm64/lib/ $(libs-y)
|
||||
libs-y += $(LIBGCC)
|
||||
|
||||
|
||||
16
arch/arm64/crypto/Kconfig
Normal file
16
arch/arm64/crypto/Kconfig
Normal file
@ -0,0 +1,16 @@
|
||||
|
||||
menuconfig ARM64_CRYPTO
|
||||
bool "ARM64 Accelerated Cryptographic Algorithms"
|
||||
depends on ARM64
|
||||
help
|
||||
Say Y here to choose from a selection of cryptographic algorithms
|
||||
implemented using ARM64 specific CPU features or instructions.
|
||||
|
||||
if ARM64_CRYPTO
|
||||
|
||||
config CRYPTO_SHA1_ARM64_CE
|
||||
tristate "SHA-1 digest algorithm (ARMv8 Crypto Extensions)"
|
||||
depends on ARM64 && KERNEL_MODE_NEON
|
||||
select CRYPTO_HASH
|
||||
|
||||
endif
|
||||
12
arch/arm64/crypto/Makefile
Normal file
12
arch/arm64/crypto/Makefile
Normal file
@ -0,0 +1,12 @@
|
||||
#
|
||||
# linux/arch/arm64/crypto/Makefile
|
||||
#
|
||||
# Copyright (C) 2014 Linaro Ltd <ard.biesheuvel@linaro.org>
|
||||
#
|
||||
# This program is free software; you can redistribute it and/or modify
|
||||
# it under the terms of the GNU General Public License version 2 as
|
||||
# published by the Free Software Foundation.
|
||||
#
|
||||
|
||||
obj-$(CONFIG_CRYPTO_SHA1_ARM64_CE) += sha1-ce.o
|
||||
sha1-ce-y := sha1-ce-glue.o sha1-ce-core.o
|
||||
153
arch/arm64/crypto/sha1-ce-core.S
Normal file
153
arch/arm64/crypto/sha1-ce-core.S
Normal file
@ -0,0 +1,153 @@
|
||||
/*
|
||||
* sha1-ce-core.S - SHA-1 secure hash using ARMv8 Crypto Extensions
|
||||
*
|
||||
* Copyright (C) 2014 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 <linux/linkage.h>
|
||||
#include <asm/assembler.h>
|
||||
|
||||
.text
|
||||
.arch armv8-a+crypto
|
||||
|
||||
k0 .req v0
|
||||
k1 .req v1
|
||||
k2 .req v2
|
||||
k3 .req v3
|
||||
|
||||
t0 .req v4
|
||||
t1 .req v5
|
||||
|
||||
dga .req q6
|
||||
dgav .req v6
|
||||
dgb .req s7
|
||||
dgbv .req v7
|
||||
|
||||
dg0q .req q12
|
||||
dg0s .req s12
|
||||
dg0v .req v12
|
||||
dg1s .req s13
|
||||
dg1v .req v13
|
||||
dg2s .req s14
|
||||
|
||||
.macro add_only, op, ev, rc, s0, dg1
|
||||
.ifc \ev, ev
|
||||
add t1.4s, v\s0\().4s, \rc\().4s
|
||||
sha1h dg2s, dg0s
|
||||
.ifnb \dg1
|
||||
sha1\op dg0q, \dg1, t0.4s
|
||||
.else
|
||||
sha1\op dg0q, dg1s, t0.4s
|
||||
.endif
|
||||
.else
|
||||
.ifnb \s0
|
||||
add t0.4s, v\s0\().4s, \rc\().4s
|
||||
.endif
|
||||
sha1h dg1s, dg0s
|
||||
sha1\op dg0q, dg2s, t1.4s
|
||||
.endif
|
||||
.endm
|
||||
|
||||
.macro add_update, op, ev, rc, s0, s1, s2, s3, dg1
|
||||
sha1su0 v\s0\().4s, v\s1\().4s, v\s2\().4s
|
||||
add_only \op, \ev, \rc, \s1, \dg1
|
||||
sha1su1 v\s0\().4s, v\s3\().4s
|
||||
.endm
|
||||
|
||||
/*
|
||||
* The SHA1 round constants
|
||||
*/
|
||||
.align 4
|
||||
.Lsha1_rcon:
|
||||
.word 0x5a827999, 0x6ed9eba1, 0x8f1bbcdc, 0xca62c1d6
|
||||
|
||||
/*
|
||||
* void sha1_ce_transform(int blocks, u8 const *src, u32 *state,
|
||||
* u8 *head, long bytes)
|
||||
*/
|
||||
ENTRY(sha1_ce_transform)
|
||||
/* load round constants */
|
||||
adr x6, .Lsha1_rcon
|
||||
ld1r {k0.4s}, [x6], #4
|
||||
ld1r {k1.4s}, [x6], #4
|
||||
ld1r {k2.4s}, [x6], #4
|
||||
ld1r {k3.4s}, [x6]
|
||||
|
||||
/* load state */
|
||||
ldr dga, [x2]
|
||||
ldr dgb, [x2, #16]
|
||||
|
||||
/* load partial state (if supplied) */
|
||||
cbz x3, 0f
|
||||
ld1 {v8.4s-v11.4s}, [x3]
|
||||
b 1f
|
||||
|
||||
/* load input */
|
||||
0: ld1 {v8.4s-v11.4s}, [x1], #64
|
||||
sub w0, w0, #1
|
||||
|
||||
1:
|
||||
CPU_LE( rev32 v8.16b, v8.16b )
|
||||
CPU_LE( rev32 v9.16b, v9.16b )
|
||||
CPU_LE( rev32 v10.16b, v10.16b )
|
||||
CPU_LE( rev32 v11.16b, v11.16b )
|
||||
|
||||
2: add t0.4s, v8.4s, k0.4s
|
||||
mov dg0v.16b, dgav.16b
|
||||
|
||||
add_update c, ev, k0, 8, 9, 10, 11, dgb
|
||||
add_update c, od, k0, 9, 10, 11, 8
|
||||
add_update c, ev, k0, 10, 11, 8, 9
|
||||
add_update c, od, k0, 11, 8, 9, 10
|
||||
add_update c, ev, k1, 8, 9, 10, 11
|
||||
|
||||
add_update p, od, k1, 9, 10, 11, 8
|
||||
add_update p, ev, k1, 10, 11, 8, 9
|
||||
add_update p, od, k1, 11, 8, 9, 10
|
||||
add_update p, ev, k1, 8, 9, 10, 11
|
||||
add_update p, od, k2, 9, 10, 11, 8
|
||||
|
||||
add_update m, ev, k2, 10, 11, 8, 9
|
||||
add_update m, od, k2, 11, 8, 9, 10
|
||||
add_update m, ev, k2, 8, 9, 10, 11
|
||||
add_update m, od, k2, 9, 10, 11, 8
|
||||
add_update m, ev, k3, 10, 11, 8, 9
|
||||
|
||||
add_update p, od, k3, 11, 8, 9, 10
|
||||
add_only p, ev, k3, 9
|
||||
add_only p, od, k3, 10
|
||||
add_only p, ev, k3, 11
|
||||
add_only p, od
|
||||
|
||||
/* update state */
|
||||
add dgbv.2s, dgbv.2s, dg1v.2s
|
||||
add dgav.4s, dgav.4s, dg0v.4s
|
||||
|
||||
cbnz w0, 0b
|
||||
|
||||
/*
|
||||
* Final block: add padding and total bit count.
|
||||
* Skip if we have no total byte count in x4. In that case, the input
|
||||
* size was not a round multiple of the block size, and the padding is
|
||||
* handled by the C code.
|
||||
*/
|
||||
cbz x4, 3f
|
||||
movi v9.2d, #0
|
||||
mov x8, #0x80000000
|
||||
movi v10.2d, #0
|
||||
ror x7, x4, #29 // ror(lsl(x4, 3), 32)
|
||||
fmov d8, x8
|
||||
mov x4, #0
|
||||
mov v11.d[0], xzr
|
||||
mov v11.d[1], x7
|
||||
b 2b
|
||||
|
||||
/* store new state */
|
||||
3: str dga, [x2]
|
||||
str dgb, [x2, #16]
|
||||
ret
|
||||
ENDPROC(sha1_ce_transform)
|
||||
174
arch/arm64/crypto/sha1-ce-glue.c
Normal file
174
arch/arm64/crypto/sha1-ce-glue.c
Normal file
@ -0,0 +1,174 @@
|
||||
/*
|
||||
* sha1-ce-glue.c - SHA-1 secure hash using ARMv8 Crypto Extensions
|
||||
*
|
||||
* Copyright (C) 2014 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/neon.h>
|
||||
#include <asm/unaligned.h>
|
||||
#include <crypto/internal/hash.h>
|
||||
#include <crypto/sha.h>
|
||||
#include <linux/cpufeature.h>
|
||||
#include <linux/crypto.h>
|
||||
#include <linux/module.h>
|
||||
|
||||
MODULE_DESCRIPTION("SHA1 secure hash using ARMv8 Crypto Extensions");
|
||||
MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@linaro.org>");
|
||||
MODULE_LICENSE("GPL v2");
|
||||
|
||||
asmlinkage void sha1_ce_transform(int blocks, u8 const *src, u32 *state,
|
||||
u8 *head, long bytes);
|
||||
|
||||
static int sha1_init(struct shash_desc *desc)
|
||||
{
|
||||
struct sha1_state *sctx = shash_desc_ctx(desc);
|
||||
|
||||
*sctx = (struct sha1_state){
|
||||
.state = { SHA1_H0, SHA1_H1, SHA1_H2, SHA1_H3, SHA1_H4 },
|
||||
};
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int sha1_update(struct shash_desc *desc, const u8 *data,
|
||||
unsigned int len)
|
||||
{
|
||||
struct sha1_state *sctx = shash_desc_ctx(desc);
|
||||
unsigned int partial = sctx->count % SHA1_BLOCK_SIZE;
|
||||
|
||||
sctx->count += len;
|
||||
|
||||
if ((partial + len) >= SHA1_BLOCK_SIZE) {
|
||||
int blocks;
|
||||
|
||||
if (partial) {
|
||||
int p = SHA1_BLOCK_SIZE - partial;
|
||||
|
||||
memcpy(sctx->buffer + partial, data, p);
|
||||
data += p;
|
||||
len -= p;
|
||||
}
|
||||
|
||||
blocks = len / SHA1_BLOCK_SIZE;
|
||||
len %= SHA1_BLOCK_SIZE;
|
||||
|
||||
kernel_neon_begin_partial(16);
|
||||
sha1_ce_transform(blocks, data, sctx->state,
|
||||
partial ? sctx->buffer : NULL, 0);
|
||||
kernel_neon_end();
|
||||
|
||||
data += blocks * SHA1_BLOCK_SIZE;
|
||||
partial = 0;
|
||||
}
|
||||
if (len)
|
||||
memcpy(sctx->buffer + partial, data, len);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int sha1_final(struct shash_desc *desc, u8 *out)
|
||||
{
|
||||
static const u8 padding[SHA1_BLOCK_SIZE] = { 0x80, };
|
||||
|
||||
struct sha1_state *sctx = shash_desc_ctx(desc);
|
||||
__be64 bits = cpu_to_be64(sctx->count << 3);
|
||||
__be32 *dst = (__be32 *)out;
|
||||
int i;
|
||||
|
||||
u32 padlen = SHA1_BLOCK_SIZE
|
||||
- ((sctx->count + sizeof(bits)) % SHA1_BLOCK_SIZE);
|
||||
|
||||
sha1_update(desc, padding, padlen);
|
||||
sha1_update(desc, (const u8 *)&bits, sizeof(bits));
|
||||
|
||||
for (i = 0; i < SHA1_DIGEST_SIZE / sizeof(__be32); i++)
|
||||
put_unaligned_be32(sctx->state[i], dst++);
|
||||
|
||||
*sctx = (struct sha1_state){};
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int sha1_finup(struct shash_desc *desc, const u8 *data,
|
||||
unsigned int len, u8 *out)
|
||||
{
|
||||
struct sha1_state *sctx = shash_desc_ctx(desc);
|
||||
__be32 *dst = (__be32 *)out;
|
||||
int blocks;
|
||||
int i;
|
||||
|
||||
if (sctx->count || !len || (len % SHA1_BLOCK_SIZE)) {
|
||||
sha1_update(desc, data, len);
|
||||
return sha1_final(desc, out);
|
||||
}
|
||||
|
||||
/*
|
||||
* Use a fast path if the input is a multiple of 64 bytes. In
|
||||
* this case, there is no need to copy data around, and we can
|
||||
* perform the entire digest calculation in a single invocation
|
||||
* of sha1_ce_transform()
|
||||
*/
|
||||
blocks = len / SHA1_BLOCK_SIZE;
|
||||
|
||||
kernel_neon_begin_partial(16);
|
||||
sha1_ce_transform(blocks, data, sctx->state, NULL, len);
|
||||
kernel_neon_end();
|
||||
|
||||
for (i = 0; i < SHA1_DIGEST_SIZE / sizeof(__be32); i++)
|
||||
put_unaligned_be32(sctx->state[i], dst++);
|
||||
|
||||
*sctx = (struct sha1_state){};
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int sha1_export(struct shash_desc *desc, void *out)
|
||||
{
|
||||
struct sha1_state *sctx = shash_desc_ctx(desc);
|
||||
struct sha1_state *dst = out;
|
||||
|
||||
*dst = *sctx;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int sha1_import(struct shash_desc *desc, const void *in)
|
||||
{
|
||||
struct sha1_state *sctx = shash_desc_ctx(desc);
|
||||
struct sha1_state const *src = in;
|
||||
|
||||
*sctx = *src;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct shash_alg alg = {
|
||||
.init = sha1_init,
|
||||
.update = sha1_update,
|
||||
.final = sha1_final,
|
||||
.finup = sha1_finup,
|
||||
.export = sha1_export,
|
||||
.import = sha1_import,
|
||||
.descsize = sizeof(struct sha1_state),
|
||||
.digestsize = SHA1_DIGEST_SIZE,
|
||||
.statesize = sizeof(struct sha1_state),
|
||||
.base = {
|
||||
.cra_name = "sha1",
|
||||
.cra_driver_name = "sha1-ce",
|
||||
.cra_priority = 200,
|
||||
.cra_flags = CRYPTO_ALG_TYPE_SHASH,
|
||||
.cra_blocksize = SHA1_BLOCK_SIZE,
|
||||
.cra_module = THIS_MODULE,
|
||||
}
|
||||
};
|
||||
|
||||
static int __init sha1_ce_mod_init(void)
|
||||
{
|
||||
return crypto_register_shash(&alg);
|
||||
}
|
||||
|
||||
static void __exit sha1_ce_mod_fini(void)
|
||||
{
|
||||
crypto_unregister_shash(&alg);
|
||||
}
|
||||
|
||||
module_cpu_feature_match(SHA1, sha1_ce_mod_init);
|
||||
module_exit(sha1_ce_mod_fini);
|
||||
Loading…
Reference in New Issue
Block a user