forked from Minki/linux
arm64/crypto: SHA-224/SHA-256 using ARMv8 Crypto Extensions
This patch adds support for the SHA-224 and SHA-256 Secure Hash Algorithms for CPUs that have support for the SHA-2 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
2c98833a42
commit
6ba6c74dfc
@ -13,4 +13,9 @@ config CRYPTO_SHA1_ARM64_CE
|
||||
depends on ARM64 && KERNEL_MODE_NEON
|
||||
select CRYPTO_HASH
|
||||
|
||||
config CRYPTO_SHA2_ARM64_CE
|
||||
tristate "SHA-224/SHA-256 digest algorithm (ARMv8 Crypto Extensions)"
|
||||
depends on ARM64 && KERNEL_MODE_NEON
|
||||
select CRYPTO_HASH
|
||||
|
||||
endif
|
||||
|
||||
@ -10,3 +10,6 @@
|
||||
|
||||
obj-$(CONFIG_CRYPTO_SHA1_ARM64_CE) += sha1-ce.o
|
||||
sha1-ce-y := sha1-ce-glue.o sha1-ce-core.o
|
||||
|
||||
obj-$(CONFIG_CRYPTO_SHA2_ARM64_CE) += sha2-ce.o
|
||||
sha2-ce-y := sha2-ce-glue.o sha2-ce-core.o
|
||||
|
||||
156
arch/arm64/crypto/sha2-ce-core.S
Normal file
156
arch/arm64/crypto/sha2-ce-core.S
Normal file
@ -0,0 +1,156 @@
|
||||
/*
|
||||
* sha2-ce-core.S - core SHA-224/SHA-256 transform using v8 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
|
||||
|
||||
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
|
||||
*/
|
||||
.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
|
||||
|
||||
/*
|
||||
* void sha2_ce_transform(int blocks, u8 const *src, u32 *state,
|
||||
* u8 *head, long bytes)
|
||||
*/
|
||||
ENTRY(sha2_ce_transform)
|
||||
/* 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 state */
|
||||
ldp dga, dgb, [x2]
|
||||
|
||||
/* load partial input (if supplied) */
|
||||
cbz x3, 0f
|
||||
ld1 {v16.4s-v19.4s}, [x3]
|
||||
b 1f
|
||||
|
||||
/* load input */
|
||||
0: ld1 {v16.4s-v19.4s}, [x1], #64
|
||||
sub w0, w0, #1
|
||||
|
||||
1:
|
||||
CPU_LE( rev32 v16.16b, v16.16b )
|
||||
CPU_LE( rev32 v17.16b, v17.16b )
|
||||
CPU_LE( rev32 v18.16b, v18.16b )
|
||||
CPU_LE( rev32 v19.16b, v19.16b )
|
||||
|
||||
2: 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
|
||||
|
||||
/* handled all input blocks? */
|
||||
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 v17.2d, #0
|
||||
mov x8, #0x80000000
|
||||
movi v18.2d, #0
|
||||
ror x7, x4, #29 // ror(lsl(x4, 3), 32)
|
||||
fmov d16, x8
|
||||
mov x4, #0
|
||||
mov v19.d[0], xzr
|
||||
mov v19.d[1], x7
|
||||
b 2b
|
||||
|
||||
/* store new state */
|
||||
3: stp dga, dgb, [x2]
|
||||
ret
|
||||
ENDPROC(sha2_ce_transform)
|
||||
255
arch/arm64/crypto/sha2-ce-glue.c
Normal file
255
arch/arm64/crypto/sha2-ce-glue.c
Normal file
@ -0,0 +1,255 @@
|
||||
/*
|
||||
* sha2-ce-glue.c - SHA-224/SHA-256 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("SHA-224/SHA-256 secure hash using ARMv8 Crypto Extensions");
|
||||
MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@linaro.org>");
|
||||
MODULE_LICENSE("GPL v2");
|
||||
|
||||
asmlinkage int sha2_ce_transform(int blocks, u8 const *src, u32 *state,
|
||||
u8 *head, long bytes);
|
||||
|
||||
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 = 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_partial(28);
|
||||
sha2_ce_transform(blocks, data, sctx->state,
|
||||
partial ? sctx->buf : NULL, 0);
|
||||
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 void sha2_finup(struct shash_desc *desc, const u8 *data,
|
||||
unsigned int len)
|
||||
{
|
||||
struct sha256_state *sctx = shash_desc_ctx(desc);
|
||||
int blocks;
|
||||
|
||||
if (sctx->count || !len || (len % SHA256_BLOCK_SIZE)) {
|
||||
sha2_update(desc, data, len);
|
||||
sha2_final(desc);
|
||||
return;
|
||||
}
|
||||
|
||||
/*
|
||||
* 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 sha2_ce_transform()
|
||||
*/
|
||||
blocks = len / SHA256_BLOCK_SIZE;
|
||||
|
||||
kernel_neon_begin_partial(28);
|
||||
sha2_ce_transform(blocks, data, sctx->state, NULL, len);
|
||||
kernel_neon_end();
|
||||
data += blocks * SHA256_BLOCK_SIZE;
|
||||
}
|
||||
|
||||
static int sha224_finup(struct shash_desc *desc, const u8 *data,
|
||||
unsigned int len, u8 *out)
|
||||
{
|
||||
struct sha256_state *sctx = shash_desc_ctx(desc);
|
||||
__be32 *dst = (__be32 *)out;
|
||||
int i;
|
||||
|
||||
sha2_finup(desc, data, len);
|
||||
|
||||
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_finup(struct shash_desc *desc, const u8 *data,
|
||||
unsigned int len, u8 *out)
|
||||
{
|
||||
struct sha256_state *sctx = shash_desc_ctx(desc);
|
||||
__be32 *dst = (__be32 *)out;
|
||||
int i;
|
||||
|
||||
sha2_finup(desc, data, len);
|
||||
|
||||
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,
|
||||
.finup = sha224_finup,
|
||||
.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,
|
||||
.finup = sha256_finup,
|
||||
.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)
|
||||
{
|
||||
return crypto_register_shashes(algs, ARRAY_SIZE(algs));
|
||||
}
|
||||
|
||||
static void __exit sha2_ce_mod_fini(void)
|
||||
{
|
||||
crypto_unregister_shashes(algs, ARRAY_SIZE(algs));
|
||||
}
|
||||
|
||||
module_cpu_feature_match(SHA2, sha2_ce_mod_init);
|
||||
module_exit(sha2_ce_mod_fini);
|
||||
Loading…
Reference in New Issue
Block a user