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Add support for selecting encryption backend

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- Add two new module parameters to icp (icp_aes_impl, icp_gcm_impl)
  that control the crypto implementation.  At the moment there is a
  choice between generic and aesni (on platforms that support it).
- This enables support for AES-NI and PCLMULQDQ-NI on AMD Family
  15h (bulldozer) and newer CPUs (zen).
- Modify aes_key_t to track what implementation it was generated
  with as key schedules generated with various implementations
  are not necessarily interchangable.

Reviewed by: Gvozden Neskovic <neskovic@gmail.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Tom Caputi <tcaputi@datto.com>
Reviewed-by: Richard Laager <rlaager@wiktel.com>
Signed-off-by: Nathaniel R. Lewis <linux.robotdude@gmail.com>
Closes #7102 
Closes #7103
This commit is contained in:
Nathan Lewis 2018-08-02 11:59:24 -07:00 committed by Brian Behlendorf
parent 3d503a76e8
commit 010d12474c
18 changed files with 2292 additions and 1582 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
cmd/ztest/ztest.c
View File

@ -129,6 +129,7 @@
#include <zfs_fletcher.h>
#include <libnvpair.h>
#include <libzfs.h>
#include <sys/crypto/icp.h>
#ifdef __GLIBC__
#include <execinfo.h> /* for backtrace() */
#endif
@ -3836,6 +3837,13 @@ ztest_dataset_create(char *dsname)
VERIFY0(dsl_crypto_params_create_nvlist(DCP_CMD_NONE, props,
crypto_args, &dcp));
/*
* Cycle through all available encryption implementations
* to verify interoperability.
*/
VERIFY0(gcm_impl_set("cycle"));
VERIFY0(aes_impl_set("cycle"));
fnvlist_free(crypto_args);
fnvlist_free(props);
}

42
config/toolchain-simd.m4
View File

@ -21,6 +21,8 @@ AC_DEFUN([ZFS_AC_CONFIG_ALWAYS_TOOLCHAIN_SIMD], [
ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_AVX512PF
ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_AVX512ER
ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_AVX512VL
ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_AES
ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_PCLMULQDQ
;;
esac
])
@ -359,3 +361,43 @@ AC_DEFUN([ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_AVX512VL], [
AC_MSG_RESULT([no])
])
])
dnl #
dnl # ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_AES
dnl #
AC_DEFUN([ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_AES], [
AC_MSG_CHECKING([whether host toolchain supports AES])
AC_LINK_IFELSE([AC_LANG_SOURCE([
[
void main()
{
__asm__ __volatile__("aesenc %xmm0, %xmm1");
}
]])], [
AC_MSG_RESULT([yes])
AC_DEFINE([HAVE_AES], 1, [Define if host toolchain supports AES])
], [
AC_MSG_RESULT([no])
])
])
dnl #
dnl # ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_PCLMULQDQ
dnl #
AC_DEFUN([ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_PCLMULQDQ], [
AC_MSG_CHECKING([whether host toolchain supports PCLMULQDQ])
AC_LINK_IFELSE([AC_LANG_SOURCE([
[
void main()
{
__asm__ __volatile__("pclmulqdq %0, %%xmm0, %%xmm1" :: "i"(0));
}
]])], [
AC_MSG_RESULT([yes])
AC_DEFINE([HAVE_PCLMULQDQ], 1, [Define if host toolchain supports PCLMULQDQ])
], [
AC_MSG_RESULT([no])
])
])

41
include/linux/simd_x86.h
View File

@ -148,7 +148,9 @@ typedef enum cpuid_inst_sets {
AVX512VBMI,
AVX512PF,
AVX512ER,
AVX512VL
AVX512VL,
AES,
PCLMULQDQ
} cpuid_inst_sets_t;
/*
@ -170,6 +172,8 @@ typedef struct cpuid_feature_desc {
#define _AVX512PF_BIT (_AVX512F_BIT | (1U << 26))
#define _AVX512ER_BIT (_AVX512F_BIT | (1U << 27))
#define _AVX512VL_BIT (1U << 31) /* if used also check other levels */
#define _AES_BIT (1U << 25)
#define _PCLMULQDQ_BIT (1U << 1)
/*
* Descriptions of supported instruction sets
@ -194,7 +198,9 @@ static const cpuid_feature_desc_t cpuid_features[] = {
[AVX512VBMI] = {7U, 0U, _AVX512VBMI_BIT, ECX },
[AVX512PF] = {7U, 0U, _AVX512PF_BIT, EBX },
[AVX512ER] = {7U, 0U, _AVX512ER_BIT, EBX },
[AVX512VL] = {7U, 0U, _AVX512ER_BIT, EBX }
[AVX512VL] = {7U, 0U, _AVX512ER_BIT, EBX },
[AES] = {1U, 0U, _AES_BIT, ECX },
[PCLMULQDQ] = {1U, 0U, _PCLMULQDQ_BIT, ECX },
};
/*
@ -265,6 +271,8 @@ CPUID_FEATURE_CHECK(avx512vbmi, AVX512VBMI);
CPUID_FEATURE_CHECK(avx512pf, AVX512PF);
CPUID_FEATURE_CHECK(avx512er, AVX512ER);
CPUID_FEATURE_CHECK(avx512vl, AVX512VL);
CPUID_FEATURE_CHECK(aes, AES);
CPUID_FEATURE_CHECK(pclmulqdq, PCLMULQDQ);
#endif /* !defined(_KERNEL) */
@ -442,6 +450,35 @@ zfs_bmi2_available(void)
#endif
}
/*
* Check if AES instruction set is available
*/
static inline boolean_t
zfs_aes_available(void)
{
#if defined(_KERNEL) && defined(X86_FEATURE_AES)
return (!!boot_cpu_has(X86_FEATURE_AES));
#elif defined(_KERNEL) && !defined(X86_FEATURE_AES)
return (B_FALSE);
#else
return (__cpuid_has_aes());
#endif
}
/*
* Check if PCLMULQDQ instruction set is available
*/
static inline boolean_t
zfs_pclmulqdq_available(void)
{
#if defined(_KERNEL) && defined(X86_FEATURE_PCLMULQDQ)
return (!!boot_cpu_has(X86_FEATURE_PCLMULQDQ));
#elif defined(_KERNEL) && !defined(X86_FEATURE_PCLMULQDQ)
return (B_FALSE);
#else
return (__cpuid_has_pclmulqdq());
#endif
}
/*
* AVX-512 family of instruction sets:

3
include/sys/crypto/icp.h
View File

@ -44,4 +44,7 @@ int skein_mod_fini(void);
int icp_init(void);
void icp_fini(void);
int aes_impl_set(const char *);
int gcm_impl_set(const char *);
#endif /* _SYS_CRYPTO_ALGS_H */

9
lib/libicp/Makefile.am
View File

@ -18,8 +18,8 @@ if TARGET_ASM_X86_64
ASM_SOURCES_C = asm-x86_64/aes/aeskey.c
ASM_SOURCES_AS = \
asm-x86_64/aes/aes_amd64.S \
asm-x86_64/aes/aes_intel.S \
asm-x86_64/modes/gcm_intel.S \
asm-x86_64/aes/aes_aesni.S \
asm-x86_64/modes/gcm_pclmulqdq.S \
asm-x86_64/sha1/sha1-x86_64.S \
asm-x86_64/sha2/sha256_impl.S \
asm-x86_64/sha2/sha512_impl.S
@ -46,11 +46,16 @@ KERNEL_C = \
api/kcf_cipher.c \
api/kcf_miscapi.c \
api/kcf_mac.c \
algs/aes/aes_impl_aesni.c \
algs/aes/aes_impl_generic.c \
algs/aes/aes_impl_x86-64.c \
algs/aes/aes_impl.c \
algs/aes/aes_modes.c \
algs/edonr/edonr.c \
algs/modes/modes.c \
algs/modes/cbc.c \
algs/modes/gcm_generic.c \
algs/modes/gcm_pclmulqdq.c \
algs/modes/gcm.c \
algs/modes/ctr.c \
algs/modes/ccm.c \

10
module/icp/Makefile.in
View File

@ -8,8 +8,8 @@ TARGET_ASM_DIR = @TARGET_ASM_DIR@
ifeq ($(TARGET_ASM_DIR), asm-x86_64)
ASM_SOURCES := asm-x86_64/aes/aeskey.o
ASM_SOURCES += asm-x86_64/aes/aes_amd64.o
ASM_SOURCES += asm-x86_64/aes/aes_intel.o
ASM_SOURCES += asm-x86_64/modes/gcm_intel.o
ASM_SOURCES += asm-x86_64/aes/aes_aesni.o
ASM_SOURCES += asm-x86_64/modes/gcm_pclmulqdq.o
ASM_SOURCES += asm-x86_64/sha1/sha1-x86_64.o
ASM_SOURCES += asm-x86_64/sha2/sha256_impl.o
ASM_SOURCES += asm-x86_64/sha2/sha512_impl.o
@ -53,8 +53,10 @@ $(MODULE)-objs += algs/modes/cbc.o
$(MODULE)-objs += algs/modes/ccm.o
$(MODULE)-objs += algs/modes/ctr.o
$(MODULE)-objs += algs/modes/ecb.o
$(MODULE)-objs += algs/modes/gcm_generic.o
$(MODULE)-objs += algs/modes/gcm.o
$(MODULE)-objs += algs/modes/modes.o
$(MODULE)-objs += algs/aes/aes_impl_generic.o
$(MODULE)-objs += algs/aes/aes_impl.o
$(MODULE)-objs += algs/aes/aes_modes.o
$(MODULE)-objs += algs/edonr/edonr.o
@ -66,6 +68,10 @@ $(MODULE)-objs += algs/skein/skein_block.o
$(MODULE)-objs += algs/skein/skein_iv.o
$(MODULE)-objs += $(ASM_SOURCES)
$(MODULE)-$(CONFIG_X86) += algs/modes/gcm_pclmulqdq.o
$(MODULE)-$(CONFIG_X86) += algs/aes/aes_impl_aesni.o
$(MODULE)-$(CONFIG_X86) += algs/aes/aes_impl_x86-64.o
ICP_DIRS = \
api \
core \

1704
module/icp/algs/aes/aes_impl.c
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123
module/icp/algs/aes/aes_impl_aesni.c Normal file
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@ -0,0 +1,123 @@
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
*/
#if defined(__x86_64) && defined(HAVE_AES)
#include <linux/simd_x86.h>
/* These functions are used to execute AES-NI instructions: */
extern int rijndael_key_setup_enc_intel(uint32_t rk[],
const uint32_t cipherKey[], uint64_t keyBits);
extern int rijndael_key_setup_dec_intel(uint32_t rk[],
const uint32_t cipherKey[], uint64_t keyBits);
extern void aes_encrypt_intel(const uint32_t rk[], int Nr,
const uint32_t pt[4], uint32_t ct[4]);
extern void aes_decrypt_intel(const uint32_t rk[], int Nr,
const uint32_t ct[4], uint32_t pt[4]);
#include <aes/aes_impl.h>
/*
* Expand the 32-bit AES cipher key array into the encryption and decryption
* key schedules.
*
* Parameters:
* key AES key schedule to be initialized
* keyarr32 User key
* keyBits AES key size (128, 192, or 256 bits)
*/
static void
aes_aesni_generate(aes_key_t *key, const uint32_t *keyarr32, int keybits)
{
kfpu_begin();
key->nr = rijndael_key_setup_enc_intel(&(key->encr_ks.ks32[0]),
keyarr32, keybits);
key->nr = rijndael_key_setup_dec_intel(&(key->decr_ks.ks32[0]),
keyarr32, keybits);
kfpu_end();
}
/*
* Encrypt one block of data. The block is assumed to be an array
* of four uint32_t values, so copy for alignment (and byte-order
* reversal for little endian systems might be necessary on the
* input and output byte streams.
* The size of the key schedule depends on the number of rounds
* (which can be computed from the size of the key), i.e. 4*(Nr + 1).
*
* Parameters:
* rk Key schedule, of aes_ks_t (60 32-bit integers)
* Nr Number of rounds
* pt Input block (plain text)
* ct Output block (crypto text). Can overlap with pt
*/
static void
aes_aesni_encrypt(const uint32_t rk[], int Nr, const uint32_t pt[4],
uint32_t ct[4])
{
kfpu_begin();
aes_encrypt_intel(rk, Nr, pt, ct);
kfpu_end();
}
/*
* Decrypt one block of data. The block is assumed to be an array
* of four uint32_t values, so copy for alignment (and byte-order
* reversal for little endian systems might be necessary on the
* input and output byte streams.
* The size of the key schedule depends on the number of rounds
* (which can be computed from the size of the key), i.e. 4*(Nr + 1).
*
* Parameters:
* rk Key schedule, of aes_ks_t (60 32-bit integers)
* Nr Number of rounds
* ct Input block (crypto text)
* pt Output block (plain text). Can overlap with pt
*/
static void
aes_aesni_decrypt(const uint32_t rk[], int Nr, const uint32_t ct[4],
uint32_t pt[4])
{
kfpu_begin();
aes_decrypt_intel(rk, Nr, ct, pt);
kfpu_end();
}
static boolean_t
aes_aesni_will_work(void)
{
return (zfs_aes_available());
}
const aes_impl_ops_t aes_aesni_impl = {
.generate = &aes_aesni_generate,
.encrypt = &aes_aesni_encrypt,
.decrypt = &aes_aesni_decrypt,
.is_supported = &aes_aesni_will_work,
.needs_byteswap = B_FALSE,
.name = "aesni"
};
#endif /* defined(__x86_64) && defined(HAVE_AES) */

1242
module/icp/algs/aes/aes_impl_generic.c Normal file
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75
module/icp/algs/aes/aes_impl_x86-64.c Normal file
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@ -0,0 +1,75 @@
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
*/
#if defined(__x86_64)
#include <linux/simd_x86.h>
/* These functions are used to execute amd64 instructions for AMD or Intel: */
extern int rijndael_key_setup_enc_amd64(uint32_t rk[],
const uint32_t cipherKey[], int keyBits);
extern int rijndael_key_setup_dec_amd64(uint32_t rk[],
const uint32_t cipherKey[], int keyBits);
extern void aes_encrypt_amd64(const uint32_t rk[], int Nr,
const uint32_t pt[4], uint32_t ct[4]);
extern void aes_decrypt_amd64(const uint32_t rk[], int Nr,
const uint32_t ct[4], uint32_t pt[4]);
#include <aes/aes_impl.h>
/*
* Expand the 32-bit AES cipher key array into the encryption and decryption
* key schedules.
*
* Parameters:
* key AES key schedule to be initialized
* keyarr32 User key
* keyBits AES key size (128, 192, or 256 bits)
*/
static void
aes_x86_64_generate(aes_key_t *key, const uint32_t *keyarr32, int keybits)
{
key->nr = rijndael_key_setup_enc_amd64(&(key->encr_ks.ks32[0]),
keyarr32, keybits);
key->nr = rijndael_key_setup_dec_amd64(&(key->decr_ks.ks32[0]),
keyarr32, keybits);
}
static boolean_t
aes_x86_64_will_work(void)
{
return (B_TRUE);
}
const aes_impl_ops_t aes_x86_64_impl = {
.generate = &aes_x86_64_generate,
.encrypt = &aes_encrypt_amd64,
.decrypt = &aes_decrypt_amd64,
.is_supported = &aes_x86_64_will_work,
.needs_byteswap = B_FALSE,
.name = "x86_64"
};
#endif /* defined(__x86_64) */

333
module/icp/algs/modes/gcm.c
View File

@ -22,93 +22,19 @@
* Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
*/
#if defined(_KERNEL) && defined(__amd64)
#include <linux/simd_x86.h>
#define KPREEMPT_DISABLE kfpu_begin()
#define KPREEMPT_ENABLE kfpu_end()
#else
#define KPREEMPT_DISABLE
#define KPREEMPT_ENABLE
#endif /* _KERNEL */
#include <sys/zfs_context.h>
#include <modes/modes.h>
#include <sys/crypto/common.h>
#include <sys/crypto/icp.h>
#include <sys/crypto/impl.h>
#include <sys/byteorder.h>
#include <modes/gcm_impl.h>
#ifdef __amd64
extern void gcm_mul_pclmulqdq(uint64_t *x_in, uint64_t *y, uint64_t *res);
static int intel_pclmulqdq_instruction_present(void);
#endif /* __amd64 */
struct aes_block {
uint64_t a;
uint64_t b;
};
/*
* gcm_mul()
* Perform a carry-less multiplication (that is, use XOR instead of the
* multiply operator) on *x_in and *y and place the result in *res.
*
* Byte swap the input (*x_in and *y) and the output (*res).
*
* Note: x_in, y, and res all point to 16-byte numbers (an array of two
* 64-bit integers).
*/
void
gcm_mul(uint64_t *x_in, uint64_t *y, uint64_t *res)
{
#ifdef __amd64
if (intel_pclmulqdq_instruction_present()) {
KPREEMPT_DISABLE;
gcm_mul_pclmulqdq(x_in, y, res);
KPREEMPT_ENABLE;
} else
#endif /* __amd64 */
{
static const uint64_t R = 0xe100000000000000ULL;
struct aes_block z = {0, 0};
struct aes_block v;
uint64_t x;
int i, j;
v.a = ntohll(y[0]);
v.b = ntohll(y[1]);
for (j = 0; j < 2; j++) {
x = ntohll(x_in[j]);
for (i = 0; i < 64; i++, x <<= 1) {
if (x & 0x8000000000000000ULL) {
z.a ^= v.a;
z.b ^= v.b;
}
if (v.b & 1ULL) {
v.b = (v.a << 63)|(v.b >> 1);
v.a = (v.a >> 1) ^ R;
} else {
v.b = (v.a << 63)|(v.b >> 1);
v.a = v.a >> 1;
}
}
}
res[0] = htonll(z.a);
res[1] = htonll(z.b);
}
}
#define GHASH(c, d, t) \
#define GHASH(c, d, t, o) \
xor_block((uint8_t *)(d), (uint8_t *)(c)->gcm_ghash); \
gcm_mul((uint64_t *)(void *)(c)->gcm_ghash, (c)->gcm_H, \
(o)->mul((uint64_t *)(void *)(c)->gcm_ghash, (c)->gcm_H, \
(uint64_t *)(void *)(t));
/*
* Encrypt multiple blocks of data in GCM mode. Decrypt for GCM mode
* is done in another function.
@ -120,6 +46,7 @@ gcm_mode_encrypt_contiguous_blocks(gcm_ctx_t *ctx, char *data, size_t length,
void (*copy_block)(uint8_t *, uint8_t *),
void (*xor_block)(uint8_t *, uint8_t *))
{
gcm_impl_ops_t *gops;
size_t remainder = length;
size_t need = 0;
uint8_t *datap = (uint8_t *)data;
@ -147,6 +74,7 @@ gcm_mode_encrypt_contiguous_blocks(gcm_ctx_t *ctx, char *data, size_t length,
if (out != NULL)
crypto_init_ptrs(out, &iov_or_mp, &offset);
gops = gcm_impl_get_ops();
do {
/* Unprocessed data from last call. */
if (ctx->gcm_remainder_len > 0) {
@ -207,7 +135,7 @@ gcm_mode_encrypt_contiguous_blocks(gcm_ctx_t *ctx, char *data, size_t length,
}
/* add ciphertext to the hash */
GHASH(ctx, ctx->gcm_tmp, ctx->gcm_ghash);
GHASH(ctx, ctx->gcm_tmp, ctx->gcm_ghash, gops);
/* Update pointer to next block of data to be processed. */
if (ctx->gcm_remainder_len != 0) {
@ -240,6 +168,7 @@ gcm_encrypt_final(gcm_ctx_t *ctx, crypto_data_t *out, size_t block_size,
void (*copy_block)(uint8_t *, uint8_t *),
void (*xor_block)(uint8_t *, uint8_t *))
{
gcm_impl_ops_t *gops;
uint64_t counter_mask = ntohll(0x00000000ffffffffULL);
uint8_t *ghash, *macp = NULL;
int i, rv;
@ -249,6 +178,7 @@ gcm_encrypt_final(gcm_ctx_t *ctx, crypto_data_t *out, size_t block_size,
return (CRYPTO_DATA_LEN_RANGE);
}
gops = gcm_impl_get_ops();
ghash = (uint8_t *)ctx->gcm_ghash;
if (ctx->gcm_remainder_len > 0) {
@ -281,14 +211,14 @@ gcm_encrypt_final(gcm_ctx_t *ctx, crypto_data_t *out, size_t block_size,
}
/* add ciphertext to the hash */
GHASH(ctx, macp, ghash);
GHASH(ctx, macp, ghash, gops);
ctx->gcm_processed_data_len += ctx->gcm_remainder_len;
}
ctx->gcm_len_a_len_c[1] =
htonll(CRYPTO_BYTES2BITS(ctx->gcm_processed_data_len));
GHASH(ctx, ctx->gcm_len_a_len_c, ghash);
GHASH(ctx, ctx->gcm_len_a_len_c, ghash, gops);
encrypt_block(ctx->gcm_keysched, (uint8_t *)ctx->gcm_J0,
(uint8_t *)ctx->gcm_J0);
xor_block((uint8_t *)ctx->gcm_J0, ghash);
@ -340,7 +270,7 @@ gcm_decrypt_incomplete_block(gcm_ctx_t *ctx, size_t block_size, size_t index,
bcopy(datap, (uint8_t *)ctx->gcm_tmp, ctx->gcm_remainder_len);
/* add ciphertext to the hash */
GHASH(ctx, ctx->gcm_tmp, ctx->gcm_ghash);
GHASH(ctx, ctx->gcm_tmp, ctx->gcm_ghash, gcm_impl_get_ops());
/* decrypt remaining ciphertext */
encrypt_block(ctx->gcm_keysched, (uint8_t *)ctx->gcm_cb, counterp);
@ -390,6 +320,7 @@ gcm_decrypt_final(gcm_ctx_t *ctx, crypto_data_t *out, size_t block_size,
int (*encrypt_block)(const void *, const uint8_t *, uint8_t *),
void (*xor_block)(uint8_t *, uint8_t *))
{
gcm_impl_ops_t *gops;
size_t pt_len;
size_t remainder;
uint8_t *ghash;
@ -401,6 +332,7 @@ gcm_decrypt_final(gcm_ctx_t *ctx, crypto_data_t *out, size_t block_size,
ASSERT(ctx->gcm_processed_data_len == ctx->gcm_pt_buf_len);
gops = gcm_impl_get_ops();
pt_len = ctx->gcm_processed_data_len - ctx->gcm_tag_len;
ghash = (uint8_t *)ctx->gcm_ghash;
blockp = ctx->gcm_pt_buf;
@ -420,7 +352,7 @@ gcm_decrypt_final(gcm_ctx_t *ctx, crypto_data_t *out, size_t block_size,
goto out;
}
/* add ciphertext to the hash */
GHASH(ctx, blockp, ghash);
GHASH(ctx, blockp, ghash, gops);
/*
* Increment counter.
@ -443,7 +375,7 @@ gcm_decrypt_final(gcm_ctx_t *ctx, crypto_data_t *out, size_t block_size,
}
out:
ctx->gcm_len_a_len_c[1] = htonll(CRYPTO_BYTES2BITS(pt_len));
GHASH(ctx, ctx->gcm_len_a_len_c, ghash);
GHASH(ctx, ctx->gcm_len_a_len_c, ghash, gops);
encrypt_block(ctx->gcm_keysched, (uint8_t *)ctx->gcm_J0,
(uint8_t *)ctx->gcm_J0);
xor_block((uint8_t *)ctx->gcm_J0, ghash);
@ -495,12 +427,14 @@ gcm_format_initial_blocks(uchar_t *iv, ulong_t iv_len,
void (*copy_block)(uint8_t *, uint8_t *),
void (*xor_block)(uint8_t *, uint8_t *))
{
gcm_impl_ops_t *gops;
uint8_t *cb;
ulong_t remainder = iv_len;
ulong_t processed = 0;
uint8_t *datap, *ghash;
uint64_t len_a_len_c[2];
gops = gcm_impl_get_ops();
ghash = (uint8_t *)ctx->gcm_ghash;
cb = (uint8_t *)ctx->gcm_cb;
if (iv_len == 12) {
@ -524,12 +458,12 @@ gcm_format_initial_blocks(uchar_t *iv, ulong_t iv_len,
processed += block_size;
remainder -= block_size;
}
GHASH(ctx, datap, ghash);
GHASH(ctx, datap, ghash, gops);
} while (remainder > 0);
len_a_len_c[0] = 0;
len_a_len_c[1] = htonll(CRYPTO_BYTES2BITS(iv_len));
GHASH(ctx, len_a_len_c, ctx->gcm_J0);
GHASH(ctx, len_a_len_c, ctx->gcm_J0, gops);
/* J0 will be used again in the final */
copy_block((uint8_t *)ctx->gcm_J0, (uint8_t *)cb);
@ -547,6 +481,7 @@ gcm_init(gcm_ctx_t *ctx, unsigned char *iv, size_t iv_len,
void (*copy_block)(uint8_t *, uint8_t *),
void (*xor_block)(uint8_t *, uint8_t *))
{
gcm_impl_ops_t *gops;
uint8_t *ghash, *datap, *authp;
size_t remainder, processed;
@ -558,6 +493,7 @@ gcm_init(gcm_ctx_t *ctx, unsigned char *iv, size_t iv_len,
gcm_format_initial_blocks(iv, iv_len, ctx, block_size,
copy_block, xor_block);
gops = gcm_impl_get_ops();
authp = (uint8_t *)ctx->gcm_tmp;
ghash = (uint8_t *)ctx->gcm_ghash;
bzero(authp, block_size);
@ -582,7 +518,7 @@ gcm_init(gcm_ctx_t *ctx, unsigned char *iv, size_t iv_len,
}
/* add auth data to the hash */
GHASH(ctx, datap, ghash);
GHASH(ctx, datap, ghash, gops);
} while (remainder > 0);
@ -694,55 +630,206 @@ gcm_set_kmflag(gcm_ctx_t *ctx, int kmflag)
ctx->gcm_kmflag = kmflag;
}
/* GCM implementation that contains the fastest methods */
static gcm_impl_ops_t gcm_fastest_impl = {
.name = "fastest"
};
#ifdef __amd64
/* All compiled in implementations */
const gcm_impl_ops_t *gcm_all_impl[] = {
&gcm_generic_impl,
#if defined(__x86_64) && defined(HAVE_PCLMULQDQ)
&gcm_pclmulqdq_impl,
#endif
};
#define INTEL_PCLMULQDQ_FLAG (1 << 1)
/* Indicate that benchmark has been completed */
static boolean_t gcm_impl_initialized = B_FALSE;
/* Select aes implementation */
#define IMPL_FASTEST (UINT32_MAX)
#define IMPL_CYCLE (UINT32_MAX-1)
#define GCM_IMPL_READ(i) (*(volatile uint32_t *) &(i))
static uint32_t icp_gcm_impl = IMPL_FASTEST;
static uint32_t user_sel_impl = IMPL_FASTEST;
/* Hold all supported implementations */
static size_t gcm_supp_impl_cnt = 0;
static gcm_impl_ops_t *gcm_supp_impl[ARRAY_SIZE(gcm_all_impl)];
/*
* Return 1 if executing on Intel with PCLMULQDQ instructions,
* otherwise 0 (i.e., Intel without PCLMULQDQ or AMD64).
* Cache the result, as the CPU can't change.
*
* Note: the userland version uses getisax(). The kernel version uses
* is_x86_featureset().
* Selects the gcm operation
*/
static int
intel_pclmulqdq_instruction_present(void)
gcm_impl_ops_t *
gcm_impl_get_ops()
{
static int cached_result = -1;
unsigned eax, ebx, ecx, edx;
unsigned func, subfunc;
gcm_impl_ops_t *ops = NULL;
const uint32_t impl = GCM_IMPL_READ(icp_gcm_impl);
if (cached_result == -1) { /* first time */
/* check for an intel cpu */
func = 0;
subfunc = 0;
switch (impl) {
case IMPL_FASTEST:
ASSERT(gcm_impl_initialized);
ops = &gcm_fastest_impl;
break;
case IMPL_CYCLE:
{
ASSERT(gcm_impl_initialized);
ASSERT3U(gcm_supp_impl_cnt, >, 0);
/* Cycle through supported implementations */
static size_t cycle_impl_idx = 0;
size_t idx = (++cycle_impl_idx) % gcm_supp_impl_cnt;
ops = gcm_supp_impl[idx];
}
break;
default:
ASSERT3U(impl, <, gcm_supp_impl_cnt);
ASSERT3U(gcm_supp_impl_cnt, >, 0);
if (impl < ARRAY_SIZE(gcm_all_impl))
ops = gcm_supp_impl[impl];
break;
}
__asm__ __volatile__(
"cpuid"
: "=a" (eax), "=b" (ebx), "=c" (ecx), "=d" (edx)
: "a"(func), "c"(subfunc));
ASSERT3P(ops, !=, NULL);
if (memcmp((char *)(&ebx), "Genu", 4) == 0 &&
memcmp((char *)(&edx), "ineI", 4) == 0 &&
memcmp((char *)(&ecx), "ntel", 4) == 0) {
func = 1;
subfunc = 0;
return (ops);
}
/* check for aes-ni instruction set */
__asm__ __volatile__(
"cpuid"
: "=a" (eax), "=b" (ebx), "=c" (ecx), "=d" (edx)
: "a"(func), "c"(subfunc));
void
gcm_impl_init(void)
{
gcm_impl_ops_t *curr_impl;
int i, c;
cached_result = !!(ecx & INTEL_PCLMULQDQ_FLAG);
} else {
cached_result = 0;
/* move supported impl into aes_supp_impls */
for (i = 0, c = 0; i < ARRAY_SIZE(gcm_all_impl); i++) {
curr_impl = (gcm_impl_ops_t *)gcm_all_impl[i];
if (curr_impl->is_supported())
gcm_supp_impl[c++] = (gcm_impl_ops_t *)curr_impl;
}
gcm_supp_impl_cnt = c;
/* set fastest implementation. assume hardware accelerated is fastest */
#if defined(__x86_64) && defined(HAVE_PCLMULQDQ)
if (gcm_pclmulqdq_impl.is_supported())
memcpy(&gcm_fastest_impl, &gcm_pclmulqdq_impl,
sizeof (gcm_fastest_impl));
else
#endif
memcpy(&gcm_fastest_impl, &gcm_generic_impl,
sizeof (gcm_fastest_impl));
strcpy(gcm_fastest_impl.name, "fastest");
/* Finish initialization */
atomic_swap_32(&icp_gcm_impl, user_sel_impl);
gcm_impl_initialized = B_TRUE;
}
static const struct {
char *name;
uint32_t sel;
} gcm_impl_opts[] = {
{ "cycle", IMPL_CYCLE },
{ "fastest", IMPL_FASTEST },
};
/*
* Function sets desired gcm implementation.
*
* If we are called before init(), user preference will be saved in
* user_sel_impl, and applied in later init() call. This occurs when module
* parameter is specified on module load. Otherwise, directly update
* icp_aes_impl.
*
* @val Name of gcm implementation to use
* @param Unused.
*/
int
gcm_impl_set(const char *val)
{
int err = -EINVAL;
char req_name[GCM_IMPL_NAME_MAX];
uint32_t impl = GCM_IMPL_READ(user_sel_impl);
size_t i;
/* sanitize input */
i = strnlen(val, GCM_IMPL_NAME_MAX);
if (i == 0 || i >= GCM_IMPL_NAME_MAX)
return (err);
strlcpy(req_name, val, GCM_IMPL_NAME_MAX);
while (i > 0 && isspace(req_name[i-1]))
i--;
req_name[i] = '\0';
/* Check mandatory options */
for (i = 0; i < ARRAY_SIZE(gcm_impl_opts); i++) {
if (strcmp(req_name, gcm_impl_opts[i].name) == 0) {
impl = gcm_impl_opts[i].sel;
err = 0;
break;
}
}
return (cached_result);
/* check all supported impl if init() was already called */
if (err != 0 && gcm_impl_initialized) {
/* check all supported implementations */
for (i = 0; i < gcm_supp_impl_cnt; i++) {
if (strcmp(req_name, gcm_supp_impl[i]->name) == 0) {
impl = i;
err = 0;
break;
}
}
}
if (err == 0) {
if (gcm_impl_initialized)
atomic_swap_32(&icp_gcm_impl, impl);
else
atomic_swap_32(&user_sel_impl, impl);
}
return (err);
}
#endif /* __amd64 */
#if defined(_KERNEL)
#include <linux/mod_compat.h>
static int
icp_gcm_impl_set(const char *val, zfs_kernel_param_t *kp)
{
return (gcm_impl_set(val));
}
static int
icp_gcm_impl_get(char *buffer, zfs_kernel_param_t *kp)
{
int i, cnt = 0;
char *fmt;
const uint32_t impl = GCM_IMPL_READ(icp_gcm_impl);
ASSERT(gcm_impl_initialized);
/* list mandatory options */
for (i = 0; i < ARRAY_SIZE(gcm_impl_opts); i++) {
fmt = (impl == gcm_impl_opts[i].sel) ? "[%s] " : "%s ";
cnt += sprintf(buffer + cnt, fmt, gcm_impl_opts[i].name);
}
/* list all supported implementations */
for (i = 0; i < gcm_supp_impl_cnt; i++) {
fmt = (i == impl) ? "[%s] " : "%s ";
cnt += sprintf(buffer + cnt, fmt, gcm_supp_impl[i]->name);
}
return (cnt);
}
module_param_call(icp_gcm_impl, icp_gcm_impl_set, icp_gcm_impl_get,
NULL, 0644);
MODULE_PARM_DESC(icp_gcm_impl, "Select gcm implementation.");
#endif

83
module/icp/algs/modes/gcm_generic.c Normal file
View File

@ -0,0 +1,83 @@
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
*/
#include <modes/gcm_impl.h>
struct aes_block {
uint64_t a;
uint64_t b;
};
/*
* Perform a carry-less multiplication (that is, use XOR instead of the
* multiply operator) on *x_in and *y and place the result in *res.
*
* Byte swap the input (*x_in and *y) and the output (*res).
*
* Note: x_in, y, and res all point to 16-byte numbers (an array of two
* 64-bit integers).
*/
static void
gcm_generic_mul(uint64_t *x_in, uint64_t *y, uint64_t *res)
{
static const uint64_t R = 0xe100000000000000ULL;
struct aes_block z = {0, 0};
struct aes_block v;
uint64_t x;
int i, j;
v.a = ntohll(y[0]);
v.b = ntohll(y[1]);
for (j = 0; j < 2; j++) {
x = ntohll(x_in[j]);
for (i = 0; i < 64; i++, x <<= 1) {
if (x & 0x8000000000000000ULL) {
z.a ^= v.a;
z.b ^= v.b;
}
if (v.b & 1ULL) {
v.b = (v.a << 63)|(v.b >> 1);
v.a = (v.a >> 1) ^ R;
} else {
v.b = (v.a << 63)|(v.b >> 1);
v.a = v.a >> 1;
}
}
}
res[0] = htonll(z.a);
res[1] = htonll(z.b);
}
static boolean_t
gcm_generic_will_work(void)
{
return (B_TRUE);
}
const gcm_impl_ops_t gcm_generic_impl = {
.mul = &gcm_generic_mul,
.is_supported = &gcm_generic_will_work,
.name = "generic"
};

64
module/icp/algs/modes/gcm_pclmulqdq.c Normal file
View File

@ -0,0 +1,64 @@
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
*/
#if defined(__x86_64) && defined(HAVE_PCLMULQDQ)
#include <linux/simd_x86.h>
/* These functions are used to execute pclmulqdq based assembly methods */
extern void gcm_mul_pclmulqdq(uint64_t *, uint64_t *, uint64_t *);
#include <modes/gcm_impl.h>
/*
* Perform a carry-less multiplication (that is, use XOR instead of the
* multiply operator) on *x_in and *y and place the result in *res.
*
* Byte swap the input (*x_in and *y) and the output (*res).
*
* Note: x_in, y, and res all point to 16-byte numbers (an array of two
* 64-bit integers).
*/
static void
gcm_pclmulqdq_mul(uint64_t *x_in, uint64_t *y, uint64_t *res)
{
kfpu_begin();
gcm_mul_pclmulqdq(x_in, y, res);
kfpu_end();
}
static boolean_t
gcm_pclmulqdq_will_work(void)
{
return (zfs_pclmulqdq_available());
}
const gcm_impl_ops_t gcm_pclmulqdq_impl = {
.mul = &gcm_pclmulqdq_mul,
.is_supported = &gcm_pclmulqdq_will_work,
.name = "pclmulqdq"
};
#endif /* defined(__x86_64) && defined(HAVE_PCLMULQDQ) */

3
module/icp/asm-x86_64/aes/aes_intel.S → module/icp/asm-x86_64/aes/aes_aesni.S
View File

@ -178,12 +178,11 @@ rijndael_key_setup_dec_intel(uint32_t rk[], const uint32_t cipherKey[],
}
#else /* lint */
#elif defined(HAVE_AES) /* guard by instruction set */
#define _ASM
#include <sys/asm_linkage.h>
/*
* _key_expansion_128(), * _key_expansion_192a(), _key_expansion_192b(),
* _key_expansion_256a(), _key_expansion_256b()

4
module/icp/asm-x86_64/modes/gcm_intel.S → module/icp/asm-x86_64/modes/gcm_pclmulqdq.S
View File

@ -81,7 +81,7 @@
*/
#if defined(lint) || defined(__lint)
#if defined(lint) || defined(__lint) /* lint */
#include <sys/types.h>
@ -90,7 +90,7 @@ void
gcm_mul_pclmulqdq(uint64_t *x_in, uint64_t *y, uint64_t *res) {
}
#else /* lint */
#elif defined(HAVE_PCLMULQDQ) /* guard by instruction set */
#define _ASM
#include <sys/asm_linkage.h>

50
module/icp/include/aes/aes_impl.h
View File

@ -106,17 +106,15 @@ typedef union {
uint32_t ks32[((MAX_AES_NR) + 1) * (MAX_AES_NB)];
} aes_ks_t;
/* aes_key.flags value: */
#define INTEL_AES_NI_CAPABLE 0x1 /* AES-NI instructions present */
typedef struct aes_impl_ops aes_impl_ops_t;
typedef struct aes_key aes_key_t;
struct aes_key {
aes_ks_t encr_ks; /* encryption key schedule */
aes_ks_t decr_ks; /* decryption key schedule */
#ifdef __amd64
long double align128; /* Align fields above for Intel AES-NI */
int flags; /* implementation-dependent flags */
#endif /* __amd64 */
const aes_impl_ops_t *ops; /* ops associated with this schedule */
int nr; /* number of rounds (10, 12, or 14) */
int type; /* key schedule size (32 or 64 bits) */
};
@ -163,6 +161,50 @@ typedef enum aes_mech_type {
#endif /* _AES_IMPL */
/*
* Methods used to define aes implementation
*
* @aes_gen_f Key generation
* @aes_enc_f Function encrypts one block
* @aes_dec_f Function decrypts one block
* @aes_will_work_f Function tests whether method will function
*/
typedef void (*aes_generate_f)(aes_key_t *, const uint32_t *, int);
typedef void (*aes_encrypt_f)(const uint32_t[], int,
const uint32_t[4], uint32_t[4]);
typedef void (*aes_decrypt_f)(const uint32_t[], int,
const uint32_t[4], uint32_t[4]);
typedef boolean_t (*aes_will_work_f)(void);
#define AES_IMPL_NAME_MAX (16)
struct aes_impl_ops {
aes_generate_f generate;
aes_encrypt_f encrypt;
aes_decrypt_f decrypt;
aes_will_work_f is_supported;
boolean_t needs_byteswap;
char name[AES_IMPL_NAME_MAX];
};
extern const aes_impl_ops_t aes_generic_impl;
#if defined(__x86_64)
extern const aes_impl_ops_t aes_x86_64_impl;
#endif
#if defined(__x86_64) && defined(HAVE_AES)
extern const aes_impl_ops_t aes_aesni_impl;
#endif
/*
* Initializes fastest implementation
*/
void aes_impl_init(void);
/*
* Get selected aes implementation
*/
struct aes_impl_ops *aes_impl_get_ops(void);
#ifdef __cplusplus
}
#endif

75
module/icp/include/modes/gcm_impl.h Normal file
View File

@ -0,0 +1,75 @@
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
*/
#ifndef _GCM_IMPL_H
#define _GCM_IMPL_H
/*
* GCM function dispatcher.
*/
#ifdef __cplusplus
extern "C" {
#endif
#include <sys/zfs_context.h>
#include <sys/crypto/common.h>
/*
* Methods used to define gcm implementation
*
* @gcm_mul_f Perform carry-less multiplication
* @gcm_will_work_f Function tests whether implementation will function
*/
typedef void (*gcm_mul_f)(uint64_t *, uint64_t *, uint64_t *);
typedef boolean_t (*gcm_will_work_f)(void);
#define GCM_IMPL_NAME_MAX (16)
typedef struct gcm_impl_ops {
gcm_mul_f mul;
gcm_will_work_f is_supported;
char name[GCM_IMPL_NAME_MAX];
} gcm_impl_ops_t;
extern const gcm_impl_ops_t gcm_generic_impl;
#if defined(__x86_64) && defined(HAVE_PCLMULQDQ)
extern const gcm_impl_ops_t gcm_pclmulqdq_impl;
#endif
/*
* Initializes fastest implementation
*/
void gcm_impl_init(void);
/*
* Get selected aes implementation
*/
struct gcm_impl_ops *gcm_impl_get_ops(void);
#ifdef __cplusplus
}
#endif
#endif /* _GCM_IMPL_H */

5
module/icp/io/aes.c
View File

@ -35,6 +35,7 @@
#include <sys/modctl.h>
#define _AES_IMPL
#include <aes/aes_impl.h>
#include <modes/gcm_impl.h>
#define CRYPTO_PROVIDER_NAME "aes"
@ -205,6 +206,10 @@ aes_mod_init(void)
{
int ret;
/* find fastest implementations and set any requested implementations */
aes_impl_init();
gcm_impl_init();
if ((ret = mod_install(&modlinkage)) != 0)
return (ret);