mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
350 lines
8.2 KiB
350 lines
8.2 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
|
/* |
|
* Cryptographic API. |
|
* |
|
* Glue code for the SHA1 Secure Hash Algorithm assembler implementation using |
|
* Supplemental SSE3 instructions. |
|
* |
|
* This file is based on sha1_generic.c |
|
* |
|
* Copyright (c) Alan Smithee. |
|
* Copyright (c) Andrew McDonald <[email protected]> |
|
* Copyright (c) Jean-Francois Dive <[email protected]> |
|
* Copyright (c) Mathias Krause <[email protected]> |
|
* Copyright (c) Chandramouli Narayanan <[email protected]> |
|
*/ |
|
|
|
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
|
|
|
#include <crypto/internal/hash.h> |
|
#include <crypto/internal/simd.h> |
|
#include <linux/init.h> |
|
#include <linux/module.h> |
|
#include <linux/mm.h> |
|
#include <linux/types.h> |
|
#include <crypto/sha1.h> |
|
#include <crypto/sha1_base.h> |
|
#include <asm/simd.h> |
|
|
|
static int sha1_update(struct shash_desc *desc, const u8 *data, |
|
unsigned int len, sha1_block_fn *sha1_xform) |
|
{ |
|
struct sha1_state *sctx = shash_desc_ctx(desc); |
|
|
|
if (!crypto_simd_usable() || |
|
(sctx->count % SHA1_BLOCK_SIZE) + len < SHA1_BLOCK_SIZE) |
|
return crypto_sha1_update(desc, data, len); |
|
|
|
/* |
|
* Make sure struct sha1_state begins directly with the SHA1 |
|
* 160-bit internal state, as this is what the asm functions expect. |
|
*/ |
|
BUILD_BUG_ON(offsetof(struct sha1_state, state) != 0); |
|
|
|
kernel_fpu_begin(); |
|
sha1_base_do_update(desc, data, len, sha1_xform); |
|
kernel_fpu_end(); |
|
|
|
return 0; |
|
} |
|
|
|
static int sha1_finup(struct shash_desc *desc, const u8 *data, |
|
unsigned int len, u8 *out, sha1_block_fn *sha1_xform) |
|
{ |
|
if (!crypto_simd_usable()) |
|
return crypto_sha1_finup(desc, data, len, out); |
|
|
|
kernel_fpu_begin(); |
|
if (len) |
|
sha1_base_do_update(desc, data, len, sha1_xform); |
|
sha1_base_do_finalize(desc, sha1_xform); |
|
kernel_fpu_end(); |
|
|
|
return sha1_base_finish(desc, out); |
|
} |
|
|
|
asmlinkage void sha1_transform_ssse3(struct sha1_state *state, |
|
const u8 *data, int blocks); |
|
|
|
static int sha1_ssse3_update(struct shash_desc *desc, const u8 *data, |
|
unsigned int len) |
|
{ |
|
return sha1_update(desc, data, len, sha1_transform_ssse3); |
|
} |
|
|
|
static int sha1_ssse3_finup(struct shash_desc *desc, const u8 *data, |
|
unsigned int len, u8 *out) |
|
{ |
|
return sha1_finup(desc, data, len, out, sha1_transform_ssse3); |
|
} |
|
|
|
/* Add padding and return the message digest. */ |
|
static int sha1_ssse3_final(struct shash_desc *desc, u8 *out) |
|
{ |
|
return sha1_ssse3_finup(desc, NULL, 0, out); |
|
} |
|
|
|
static struct shash_alg sha1_ssse3_alg = { |
|
.digestsize = SHA1_DIGEST_SIZE, |
|
.init = sha1_base_init, |
|
.update = sha1_ssse3_update, |
|
.final = sha1_ssse3_final, |
|
.finup = sha1_ssse3_finup, |
|
.descsize = sizeof(struct sha1_state), |
|
.base = { |
|
.cra_name = "sha1", |
|
.cra_driver_name = "sha1-ssse3", |
|
.cra_priority = 150, |
|
.cra_blocksize = SHA1_BLOCK_SIZE, |
|
.cra_module = THIS_MODULE, |
|
} |
|
}; |
|
|
|
static int register_sha1_ssse3(void) |
|
{ |
|
if (boot_cpu_has(X86_FEATURE_SSSE3)) |
|
return crypto_register_shash(&sha1_ssse3_alg); |
|
return 0; |
|
} |
|
|
|
static void unregister_sha1_ssse3(void) |
|
{ |
|
if (boot_cpu_has(X86_FEATURE_SSSE3)) |
|
crypto_unregister_shash(&sha1_ssse3_alg); |
|
} |
|
|
|
asmlinkage void sha1_transform_avx(struct sha1_state *state, |
|
const u8 *data, int blocks); |
|
|
|
static int sha1_avx_update(struct shash_desc *desc, const u8 *data, |
|
unsigned int len) |
|
{ |
|
return sha1_update(desc, data, len, sha1_transform_avx); |
|
} |
|
|
|
static int sha1_avx_finup(struct shash_desc *desc, const u8 *data, |
|
unsigned int len, u8 *out) |
|
{ |
|
return sha1_finup(desc, data, len, out, sha1_transform_avx); |
|
} |
|
|
|
static int sha1_avx_final(struct shash_desc *desc, u8 *out) |
|
{ |
|
return sha1_avx_finup(desc, NULL, 0, out); |
|
} |
|
|
|
static struct shash_alg sha1_avx_alg = { |
|
.digestsize = SHA1_DIGEST_SIZE, |
|
.init = sha1_base_init, |
|
.update = sha1_avx_update, |
|
.final = sha1_avx_final, |
|
.finup = sha1_avx_finup, |
|
.descsize = sizeof(struct sha1_state), |
|
.base = { |
|
.cra_name = "sha1", |
|
.cra_driver_name = "sha1-avx", |
|
.cra_priority = 160, |
|
.cra_blocksize = SHA1_BLOCK_SIZE, |
|
.cra_module = THIS_MODULE, |
|
} |
|
}; |
|
|
|
static bool avx_usable(void) |
|
{ |
|
if (!cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM, NULL)) { |
|
if (boot_cpu_has(X86_FEATURE_AVX)) |
|
pr_info("AVX detected but unusable.\n"); |
|
return false; |
|
} |
|
|
|
return true; |
|
} |
|
|
|
static int register_sha1_avx(void) |
|
{ |
|
if (avx_usable()) |
|
return crypto_register_shash(&sha1_avx_alg); |
|
return 0; |
|
} |
|
|
|
static void unregister_sha1_avx(void) |
|
{ |
|
if (avx_usable()) |
|
crypto_unregister_shash(&sha1_avx_alg); |
|
} |
|
|
|
#define SHA1_AVX2_BLOCK_OPTSIZE 4 /* optimal 4*64 bytes of SHA1 blocks */ |
|
|
|
asmlinkage void sha1_transform_avx2(struct sha1_state *state, |
|
const u8 *data, int blocks); |
|
|
|
static bool avx2_usable(void) |
|
{ |
|
if (avx_usable() && boot_cpu_has(X86_FEATURE_AVX2) |
|
&& boot_cpu_has(X86_FEATURE_BMI1) |
|
&& boot_cpu_has(X86_FEATURE_BMI2)) |
|
return true; |
|
|
|
return false; |
|
} |
|
|
|
static void sha1_apply_transform_avx2(struct sha1_state *state, |
|
const u8 *data, int blocks) |
|
{ |
|
/* Select the optimal transform based on data block size */ |
|
if (blocks >= SHA1_AVX2_BLOCK_OPTSIZE) |
|
sha1_transform_avx2(state, data, blocks); |
|
else |
|
sha1_transform_avx(state, data, blocks); |
|
} |
|
|
|
static int sha1_avx2_update(struct shash_desc *desc, const u8 *data, |
|
unsigned int len) |
|
{ |
|
return sha1_update(desc, data, len, sha1_apply_transform_avx2); |
|
} |
|
|
|
static int sha1_avx2_finup(struct shash_desc *desc, const u8 *data, |
|
unsigned int len, u8 *out) |
|
{ |
|
return sha1_finup(desc, data, len, out, sha1_apply_transform_avx2); |
|
} |
|
|
|
static int sha1_avx2_final(struct shash_desc *desc, u8 *out) |
|
{ |
|
return sha1_avx2_finup(desc, NULL, 0, out); |
|
} |
|
|
|
static struct shash_alg sha1_avx2_alg = { |
|
.digestsize = SHA1_DIGEST_SIZE, |
|
.init = sha1_base_init, |
|
.update = sha1_avx2_update, |
|
.final = sha1_avx2_final, |
|
.finup = sha1_avx2_finup, |
|
.descsize = sizeof(struct sha1_state), |
|
.base = { |
|
.cra_name = "sha1", |
|
.cra_driver_name = "sha1-avx2", |
|
.cra_priority = 170, |
|
.cra_blocksize = SHA1_BLOCK_SIZE, |
|
.cra_module = THIS_MODULE, |
|
} |
|
}; |
|
|
|
static int register_sha1_avx2(void) |
|
{ |
|
if (avx2_usable()) |
|
return crypto_register_shash(&sha1_avx2_alg); |
|
return 0; |
|
} |
|
|
|
static void unregister_sha1_avx2(void) |
|
{ |
|
if (avx2_usable()) |
|
crypto_unregister_shash(&sha1_avx2_alg); |
|
} |
|
|
|
#ifdef CONFIG_AS_SHA1_NI |
|
asmlinkage void sha1_ni_transform(struct sha1_state *digest, const u8 *data, |
|
int rounds); |
|
|
|
static int sha1_ni_update(struct shash_desc *desc, const u8 *data, |
|
unsigned int len) |
|
{ |
|
return sha1_update(desc, data, len, sha1_ni_transform); |
|
} |
|
|
|
static int sha1_ni_finup(struct shash_desc *desc, const u8 *data, |
|
unsigned int len, u8 *out) |
|
{ |
|
return sha1_finup(desc, data, len, out, sha1_ni_transform); |
|
} |
|
|
|
static int sha1_ni_final(struct shash_desc *desc, u8 *out) |
|
{ |
|
return sha1_ni_finup(desc, NULL, 0, out); |
|
} |
|
|
|
static struct shash_alg sha1_ni_alg = { |
|
.digestsize = SHA1_DIGEST_SIZE, |
|
.init = sha1_base_init, |
|
.update = sha1_ni_update, |
|
.final = sha1_ni_final, |
|
.finup = sha1_ni_finup, |
|
.descsize = sizeof(struct sha1_state), |
|
.base = { |
|
.cra_name = "sha1", |
|
.cra_driver_name = "sha1-ni", |
|
.cra_priority = 250, |
|
.cra_blocksize = SHA1_BLOCK_SIZE, |
|
.cra_module = THIS_MODULE, |
|
} |
|
}; |
|
|
|
static int register_sha1_ni(void) |
|
{ |
|
if (boot_cpu_has(X86_FEATURE_SHA_NI)) |
|
return crypto_register_shash(&sha1_ni_alg); |
|
return 0; |
|
} |
|
|
|
static void unregister_sha1_ni(void) |
|
{ |
|
if (boot_cpu_has(X86_FEATURE_SHA_NI)) |
|
crypto_unregister_shash(&sha1_ni_alg); |
|
} |
|
|
|
#else |
|
static inline int register_sha1_ni(void) { return 0; } |
|
static inline void unregister_sha1_ni(void) { } |
|
#endif |
|
|
|
static int __init sha1_ssse3_mod_init(void) |
|
{ |
|
if (register_sha1_ssse3()) |
|
goto fail; |
|
|
|
if (register_sha1_avx()) { |
|
unregister_sha1_ssse3(); |
|
goto fail; |
|
} |
|
|
|
if (register_sha1_avx2()) { |
|
unregister_sha1_avx(); |
|
unregister_sha1_ssse3(); |
|
goto fail; |
|
} |
|
|
|
if (register_sha1_ni()) { |
|
unregister_sha1_avx2(); |
|
unregister_sha1_avx(); |
|
unregister_sha1_ssse3(); |
|
goto fail; |
|
} |
|
|
|
return 0; |
|
fail: |
|
return -ENODEV; |
|
} |
|
|
|
static void __exit sha1_ssse3_mod_fini(void) |
|
{ |
|
unregister_sha1_ni(); |
|
unregister_sha1_avx2(); |
|
unregister_sha1_avx(); |
|
unregister_sha1_ssse3(); |
|
} |
|
|
|
module_init(sha1_ssse3_mod_init); |
|
module_exit(sha1_ssse3_mod_fini); |
|
|
|
MODULE_LICENSE("GPL"); |
|
MODULE_DESCRIPTION("SHA1 Secure Hash Algorithm, Supplemental SSE3 accelerated"); |
|
|
|
MODULE_ALIAS_CRYPTO("sha1"); |
|
MODULE_ALIAS_CRYPTO("sha1-ssse3"); |
|
MODULE_ALIAS_CRYPTO("sha1-avx"); |
|
MODULE_ALIAS_CRYPTO("sha1-avx2"); |
|
#ifdef CONFIG_AS_SHA1_NI |
|
MODULE_ALIAS_CRYPTO("sha1-ni"); |
|
#endif
|
|
|