chapoly: Add an SSSE3 based driver
We always build the driver on x86/x64, but enable it only if SSSE3 support is detected during runtime. Poly1305 uses parallel 32-bit multiplication operands yielding a 64-bit result, for which two can be done in parallel in SSE. This is minimally faster than multiplication with 64-bit operands, and also works on 32-bit builds not having a __int128 result type. On a 32-bit architecture, this is more than twice as fast as the portable driver, and on 64-bit it is ~30% faster.
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Martin Willi committed
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@@ -4,8 +4,9 @@ AM_CPPFLAGS = \
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AM_CFLAGS = \
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$(PLUGIN_CFLAGS)
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noinst_LTLIBRARIES =
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if MONOLITHIC
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noinst_LTLIBRARIES = libstrongswan-chapoly.la
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noinst_LTLIBRARIES += libstrongswan-chapoly.la
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else
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plugin_LTLIBRARIES = libstrongswan-chapoly.la
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endif
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@@ -16,4 +17,13 @@ libstrongswan_chapoly_la_SOURCES = \
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chapoly_drv_portable.h chapoly_drv_portable.c \
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chapoly_aead.h chapoly_aead.c
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noinst_LTLIBRARIES += libchapoly-drv-ssse3.la
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libchapoly_drv_ssse3_la_SOURCES = chapoly_drv_ssse3.h chapoly_drv_ssse3.c
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if USE_X86X64
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libchapoly_drv_ssse3_la_CFLAGS = $(PLUGIN_CFLAGS) -mssse3
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endif
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libstrongswan_chapoly_la_LIBADD = \
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libchapoly-drv-ssse3.la
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libstrongswan_chapoly_la_LDFLAGS = -module -avoid-version
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@@ -15,6 +15,7 @@
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#include "chapoly_drv.h"
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#include "chapoly_drv_portable.h"
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#include "chapoly_drv_ssse3.h"
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typedef chapoly_drv_t*(*chapoly_drv_create)();
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@@ -24,6 +25,7 @@ typedef chapoly_drv_t*(*chapoly_drv_create)();
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chapoly_drv_t *chapoly_drv_probe()
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{
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chapoly_drv_create drivers[] = {
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chapoly_drv_ssse3_create,
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chapoly_drv_portable_create,
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};
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chapoly_drv_t *driver;
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@@ -0,0 +1,470 @@
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/*
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* Copyright (C) 2015 Martin Willi
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* Copyright (C) 2015 revosec AG
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*
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* Based on public domain code by Andrew Moon and Daniel J. Bernstein.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*/
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#include "chapoly_drv_ssse3.h"
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#ifdef __SSSE3__
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#include <utils/cpu_feature.h>
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#include <tmmintrin.h>
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#define CHACHA_DOUBLEROUNDS 10
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typedef struct private_chapoly_drv_ssse3_t private_chapoly_drv_ssse3_t;
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/**
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* Private data of an chapoly_drv_ssse3_t object.
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*/
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struct private_chapoly_drv_ssse3_t {
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/**
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* Public chapoly_drv_ssse3_t interface.
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*/
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chapoly_drv_t public;
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/**
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* ChaCha20 state matrix, as 128-bit vectors
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*/
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__m128i m[4];
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/**
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* Poly1305 update key
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*/
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u_int32_t r[5];
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/**
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* Poly1305 state
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*/
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u_int32_t h[5];
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/**
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* Poly1305 finalize key
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*/
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u_int32_t s[4];
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};
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/**
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* Read a 32-bit integer from an unaligned address
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*/
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static inline u_int32_t ru32(void *p)
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{
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u_int32_t ret;
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memcpy(&ret, p, sizeof(ret));
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return ret;
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}
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/**
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* Write a 32-bit word to an unaligned address
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*/
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static inline void wu32(void *p, u_int32_t v)
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{
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memcpy(p, &v, sizeof(v));
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}
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/**
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* Shift a 64-bit unsigned integer v right by n bits, clamp to 32 bit
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*/
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static inline u_int32_t sr(u_int64_t v, u_char n)
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{
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return v >> n;
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}
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/**
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* AND two values, using a native integer size >= sizeof(u_int32_t)
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*/
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static inline u_long and(u_long v, u_long mask)
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{
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return v & mask;
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}
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/**
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* XOR a Chacha20 keystream block into data, increment counter
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*/
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static void chacha_block_xor(private_chapoly_drv_ssse3_t *this, void *data)
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{
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__m128i x0, x1, x2, x3, r8, r16, *out = data;
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u_int i;
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r8 = _mm_set_epi8(14, 13, 12, 15, 10, 9, 8, 11, 6, 5, 4, 7, 2, 1, 0, 3);
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r16 = _mm_set_epi8(13, 12, 15, 14, 9, 8, 11, 10, 5, 4, 7, 6, 1, 0, 3, 2);
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x0 = this->m[0];
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x1 = this->m[1];
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x2 = this->m[2];
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x3 = this->m[3];
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for (i = 0 ; i < CHACHA_DOUBLEROUNDS; i++)
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{
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x0 = _mm_add_epi32(x0, x1);
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x3 = _mm_xor_si128(x3, x0);
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x3 = _mm_shuffle_epi8(x3, r16);
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x2 = _mm_add_epi32(x2, x3);
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x1 = _mm_xor_si128(x1, x2);
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x1 = _mm_xor_si128(_mm_slli_epi32(x1, 12), _mm_srli_epi32(x1, 20));
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x0 = _mm_add_epi32(x0, x1);
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x3 = _mm_xor_si128(x3, x0);
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x3 = _mm_shuffle_epi8(x3, r8);
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x2 = _mm_add_epi32(x2, x3);
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x1 = _mm_xor_si128(x1, x2);
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x1 = _mm_xor_si128(_mm_slli_epi32(x1, 7), _mm_srli_epi32(x1, 25));
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x1 = _mm_shuffle_epi32(x1, _MM_SHUFFLE(0, 3, 2, 1));
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x2 = _mm_shuffle_epi32(x2, _MM_SHUFFLE(1, 0, 3, 2));
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x3 = _mm_shuffle_epi32(x3, _MM_SHUFFLE(2, 1, 0, 3));
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x0 = _mm_add_epi32(x0, x1);
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x3 = _mm_xor_si128(x3, x0);
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x3 = _mm_shuffle_epi8(x3, r16);
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x2 = _mm_add_epi32(x2, x3);
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x1 = _mm_xor_si128(x1, x2);
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x1 = _mm_xor_si128(_mm_slli_epi32(x1, 12), _mm_srli_epi32(x1, 20));
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x0 = _mm_add_epi32(x0, x1);
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x3 = _mm_xor_si128(x3, x0);
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x3 = _mm_shuffle_epi8(x3, r8);
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x2 = _mm_add_epi32(x2, x3);
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x1 = _mm_xor_si128(x1, x2);
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x1 = _mm_xor_si128(_mm_slli_epi32(x1, 7), _mm_srli_epi32(x1, 25));
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x1 = _mm_shuffle_epi32(x1, _MM_SHUFFLE(2, 1, 0, 3));
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x2 = _mm_shuffle_epi32(x2, _MM_SHUFFLE(1, 0, 3, 2));
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x3 = _mm_shuffle_epi32(x3, _MM_SHUFFLE(0, 3, 2, 1));
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}
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x0 = _mm_add_epi32(x0, this->m[0]);
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x1 = _mm_add_epi32(x1, this->m[1]);
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x2 = _mm_add_epi32(x2, this->m[2]);
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x3 = _mm_add_epi32(x3, this->m[3]);
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x0 = _mm_xor_si128(x0, _mm_loadu_si128(out + 0));
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x1 = _mm_xor_si128(x1, _mm_loadu_si128(out + 1));
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x2 = _mm_xor_si128(x2, _mm_loadu_si128(out + 2));
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x3 = _mm_xor_si128(x3, _mm_loadu_si128(out + 3));
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_mm_storeu_si128(out + 0, x0);
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_mm_storeu_si128(out + 1, x1);
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_mm_storeu_si128(out + 2, x2);
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_mm_storeu_si128(out + 3, x3);
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this->m[3] = _mm_add_epi32(this->m[3], _mm_set_epi32(0, 0, 0, 1));
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}
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METHOD(chapoly_drv_t, set_key, bool,
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private_chapoly_drv_ssse3_t *this, u_char *constant, u_char *key,
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u_char *salt)
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{
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this->m[0] = _mm_loadu_si128((__m128i*)constant);
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this->m[1] = _mm_loadu_si128((__m128i*)key + 0);
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this->m[2] = _mm_loadu_si128((__m128i*)key + 1);
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this->m[3] = _mm_set_epi32(0, 0, ru32(salt), 0);
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return TRUE;
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}
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METHOD(chapoly_drv_t, init, bool,
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private_chapoly_drv_ssse3_t *this, u_char *iv)
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{
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u_char key[CHACHA_BLOCK_SIZE];
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this->m[3] = _mm_or_si128(
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_mm_set_epi32(ru32(iv + 4), ru32(iv + 0), 0, 0),
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_mm_and_si128(this->m[3], _mm_set_epi32(0, 0, ~0, 0)));
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memset(key, 0, CHACHA_BLOCK_SIZE);
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chacha_block_xor(this, key);
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/* r &= 0xffffffc0ffffffc0ffffffc0fffffff */
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this->r[0] = (ru32(key + 0) >> 0) & 0x3ffffff;
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this->r[1] = (ru32(key + 3) >> 2) & 0x3ffff03;
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this->r[2] = (ru32(key + 6) >> 4) & 0x3ffc0ff;
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this->r[3] = (ru32(key + 9) >> 6) & 0x3f03fff;
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this->r[4] = (ru32(key + 12) >> 8) & 0x00fffff;
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/* h = 0 */
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memwipe(this->h, sizeof(this->h));
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this->s[0] = ru32(key + 16);
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this->s[1] = ru32(key + 20);
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this->s[2] = ru32(key + 24);
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this->s[3] = ru32(key + 28);
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return TRUE;
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}
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/**
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* r[127:64] = h[95:64] * a, r[63:0] = h[31:0] * b
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*/
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static inline __m128i mul2(__m128i h, u_int32_t a, u_int32_t b)
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{
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return _mm_mul_epu32(h, _mm_set_epi32(0, a, 0, b));
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}
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/**
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* c = a[127:64] + a[63:0] + b[127:64] + b[63:0]
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* z = x[127:64] + x[63:0] + y[127:64] + y[63:0]
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*/
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static inline void sum2(__m128i a, __m128i b, __m128i x, __m128i y,
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u_int64_t *c, u_int64_t *z)
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{
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__m128i r, s;
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a = _mm_add_epi64(a, b);
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x = _mm_add_epi64(x, y);
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r = _mm_unpacklo_epi64(x, a);
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s = _mm_unpackhi_epi64(x, a);
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r = _mm_add_epi64(r, s);
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_mm_storel_epi64((__m128i*)z, r);
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_mm_storel_epi64((__m128i*)c, _mm_srli_si128(r, 8));
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}
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METHOD(chapoly_drv_t, poly, bool,
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private_chapoly_drv_ssse3_t *this, u_char *data, u_int blocks)
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{
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u_int32_t r0, r1, r2, r3, r4;
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u_int32_t s1, s2, s3, s4;
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u_int32_t h0, h1, h2, h3, h4;
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u_int64_t d0, d1, d2, d3, d4;
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__m128i h01, h23, h44;
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__m128i x0, x1, y0, y1, z0;
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u_int32_t t0, t1;
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r0 = this->r[0];
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r1 = this->r[1];
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r2 = this->r[2];
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r3 = this->r[3];
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r4 = this->r[4];
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s1 = r1 * 5;
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s2 = r2 * 5;
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s3 = r3 * 5;
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s4 = r4 * 5;
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h0 = this->h[0];
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h1 = this->h[1];
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h2 = this->h[2];
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h3 = this->h[3];
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h4 = this->h[4];
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while (blocks--)
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{
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h01 = _mm_set_epi32(0, h0, 0, h1);
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h23 = _mm_set_epi32(0, h2, 0, h3);
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h44 = _mm_set_epi32(0, h4, 0, h4);
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/* h += m[i] */
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t0 = (ru32(data + 0) >> 0) & 0x3ffffff;
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t1 = (ru32(data + 3) >> 2) & 0x3ffffff;
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h01 = _mm_add_epi32(h01, _mm_set_epi32(0, t0, 0, t1));
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t0 = (ru32(data + 6) >> 4) & 0x3ffffff;
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t1 = (ru32(data + 9) >> 6) & 0x3ffffff;
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h23 = _mm_add_epi32(h23, _mm_set_epi32(0, t0, 0, t1));
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t0 = (ru32(data + 12) >> 8) | (1 << 24);
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h44 = _mm_add_epi32(h44, _mm_set_epi32(0, t0, 0, t0));
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/* h *= r */
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x0 = mul2(h01, r0, s4);
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x1 = mul2(h01, r1, r0);
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y0 = mul2(h23, s3, s2);
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y1 = mul2(h23, s4, s3);
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z0 = mul2(h44, s1, s2);
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y0 = _mm_add_epi64(y0, _mm_srli_si128(z0, 8));
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y1 = _mm_add_epi64(y1, _mm_slli_si128(z0, 8));
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sum2(x0, y0, x1, y1, &d0, &d1);
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x0 = mul2(h01, r2, r1);
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x1 = mul2(h01, r3, r2);
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y0 = mul2(h23, r0, s4);
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y1 = mul2(h23, r1, r0);
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z0 = mul2(h44, s3, s4);
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y0 = _mm_add_epi64(y0, _mm_srli_si128(z0, 8));
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y1 = _mm_add_epi64(y1, _mm_slli_si128(z0, 8));
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sum2(x0, y0, x1, y1, &d2, &d3);
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x0 = mul2(h01, r4, r3);
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y0 = mul2(h23, r2, r1);
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z0 = mul2(h44, r0, 0);
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y0 = _mm_add_epi64(y0, z0);
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x0 = _mm_add_epi64(x0, y0);
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x0 = _mm_add_epi64(x0, _mm_srli_si128(x0, 8));
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_mm_storel_epi64((__m128i*)&d4, x0);
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/* (partial) h %= p */
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d1 += sr(d0, 26); h0 = and(d0, 0x3ffffff);
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d2 += sr(d1, 26); h1 = and(d1, 0x3ffffff);
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d3 += sr(d2, 26); h2 = and(d2, 0x3ffffff);
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d4 += sr(d3, 26); h3 = and(d3, 0x3ffffff);
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h0 += sr(d4, 26) * 5; h4 = and(d4, 0x3ffffff);
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h1 += h0 >> 26; h0 = h0 & 0x3ffffff;
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data += POLY_BLOCK_SIZE;
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}
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this->h[0] = h0;
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this->h[1] = h1;
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this->h[2] = h2;
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this->h[3] = h3;
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this->h[4] = h4;
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return TRUE;
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}
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METHOD(chapoly_drv_t, chacha, bool,
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private_chapoly_drv_ssse3_t *this, u_char *stream)
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{
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memset(stream, 0, CHACHA_BLOCK_SIZE);
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chacha_block_xor(this, stream);
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return TRUE;
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}
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METHOD(chapoly_drv_t, encrypt, bool,
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private_chapoly_drv_ssse3_t *this, u_char *data, u_int blocks)
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{
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u_int i;
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for (i = 0; i < blocks; i++)
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{
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chacha_block_xor(this, data);
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poly(this, data, 4);
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data += CHACHA_BLOCK_SIZE;
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}
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return TRUE;
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}
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METHOD(chapoly_drv_t, decrypt, bool,
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private_chapoly_drv_ssse3_t *this, u_char *data, u_int blocks)
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{
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u_int i;
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for (i = 0; i < blocks; i++)
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{
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poly(this, data, 4);
|
||||
chacha_block_xor(this, data);
|
||||
data += CHACHA_BLOCK_SIZE;
|
||||
}
|
||||
return TRUE;
|
||||
}
|
||||
|
||||
METHOD(chapoly_drv_t, finish, bool,
|
||||
private_chapoly_drv_ssse3_t *this, u_char *mac)
|
||||
{
|
||||
u_int32_t h0, h1, h2, h3, h4;
|
||||
u_int32_t g0, g1, g2, g3, g4;
|
||||
u_int32_t mask;
|
||||
u_int64_t f = 0;
|
||||
|
||||
/* fully carry h */
|
||||
h0 = this->h[0];
|
||||
h1 = this->h[1];
|
||||
h2 = this->h[2];
|
||||
h3 = this->h[3];
|
||||
h4 = this->h[4];
|
||||
|
||||
h2 += (h1 >> 26); h1 = h1 & 0x3ffffff;
|
||||
h3 += (h2 >> 26); h2 = h2 & 0x3ffffff;
|
||||
h4 += (h3 >> 26); h3 = h3 & 0x3ffffff;
|
||||
h0 += (h4 >> 26) * 5; h4 = h4 & 0x3ffffff;
|
||||
h1 += (h0 >> 26); h0 = h0 & 0x3ffffff;
|
||||
|
||||
/* compute h + -p */
|
||||
g0 = h0 + 5;
|
||||
g1 = h1 + (g0 >> 26); g0 &= 0x3ffffff;
|
||||
g2 = h2 + (g1 >> 26); g1 &= 0x3ffffff;
|
||||
g3 = h3 + (g2 >> 26); g2 &= 0x3ffffff;
|
||||
g4 = h4 + (g3 >> 26) - (1 << 26); g3 &= 0x3ffffff;
|
||||
|
||||
/* select h if h < p, or h + -p if h >= p */
|
||||
mask = (g4 >> ((sizeof(u_int32_t) * 8) - 1)) - 1;
|
||||
g0 &= mask;
|
||||
g1 &= mask;
|
||||
g2 &= mask;
|
||||
g3 &= mask;
|
||||
g4 &= mask;
|
||||
mask = ~mask;
|
||||
h0 = (h0 & mask) | g0;
|
||||
h1 = (h1 & mask) | g1;
|
||||
h2 = (h2 & mask) | g2;
|
||||
h3 = (h3 & mask) | g3;
|
||||
h4 = (h4 & mask) | g4;
|
||||
|
||||
/* h = h % (2^128) */
|
||||
h0 = (h0 >> 0) | (h1 << 26);
|
||||
h1 = (h1 >> 6) | (h2 << 20);
|
||||
h2 = (h2 >> 12) | (h3 << 14);
|
||||
h3 = (h3 >> 18) | (h4 << 8);
|
||||
|
||||
/* mac = (h + s) % (2^128) */
|
||||
f = (f >> 32) + h0 + this->s[0]; wu32(mac + 0, f);
|
||||
f = (f >> 32) + h1 + this->s[1]; wu32(mac + 4, f);
|
||||
f = (f >> 32) + h2 + this->s[2]; wu32(mac + 8, f);
|
||||
f = (f >> 32) + h3 + this->s[3]; wu32(mac + 12, f);
|
||||
|
||||
return TRUE;
|
||||
}
|
||||
|
||||
METHOD(chapoly_drv_t, destroy, void,
|
||||
private_chapoly_drv_ssse3_t *this)
|
||||
{
|
||||
memwipe(this->m, sizeof(this->m));
|
||||
memwipe(this->h, sizeof(this->h));
|
||||
memwipe(this->r, sizeof(this->r));
|
||||
memwipe(this->s, sizeof(this->s));
|
||||
free_align(this);
|
||||
}
|
||||
|
||||
/**
|
||||
* See header
|
||||
*/
|
||||
chapoly_drv_t *chapoly_drv_ssse3_create()
|
||||
{
|
||||
private_chapoly_drv_ssse3_t *this;
|
||||
|
||||
if (!cpu_feature_available(CPU_FEATURE_SSSE3))
|
||||
{
|
||||
return FALSE;
|
||||
}
|
||||
|
||||
INIT_ALIGN(this, sizeof(__m128i),
|
||||
.public = {
|
||||
.set_key = _set_key,
|
||||
.init = _init,
|
||||
.poly = _poly,
|
||||
.chacha = _chacha,
|
||||
.encrypt = _encrypt,
|
||||
.decrypt = _decrypt,
|
||||
.finish = _finish,
|
||||
.destroy = _destroy,
|
||||
},
|
||||
);
|
||||
|
||||
return &this->public;
|
||||
}
|
||||
|
||||
#else /* !__SSSE3__ */
|
||||
|
||||
chapoly_drv_t *chapoly_drv_ssse3_create()
|
||||
{
|
||||
return NULL;
|
||||
}
|
||||
|
||||
#endif /* !__SSSE3__ */
|
||||
@@ -0,0 +1,31 @@
|
||||
/*
|
||||
* Copyright (C) 2015 Martin Willi
|
||||
* Copyright (C) 2015 revosec AG
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify it
|
||||
* under the terms of the GNU General Public License as published by the
|
||||
* Free Software Foundation; either version 2 of the License, or (at your
|
||||
* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful, but
|
||||
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
|
||||
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
||||
* for more details.
|
||||
*/
|
||||
|
||||
/**
|
||||
* @defgroup chapoly_drv_ssse3 chapoly_drv_ssse3
|
||||
* @{ @ingroup chapoly
|
||||
*/
|
||||
|
||||
#include "chapoly_drv.h"
|
||||
|
||||
#ifndef CHAPOLY_DRV_SSSE3_H_
|
||||
#define CHAPOLY_DRV_SSSE3_H_
|
||||
|
||||
/**
|
||||
* Create a chapoly_drv_ssse3 instance.
|
||||
*/
|
||||
chapoly_drv_t *chapoly_drv_ssse3_create();
|
||||
|
||||
#endif /** CHAPOLY_DRV_SSSE3_H_ @}*/
|
||||
Reference in new issue
Block a user