mirror of
https://github.com/rn10950/RetroZilla.git
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624 lines
25 KiB
C
624 lines
25 KiB
C
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/* This implementation of poly1305 is by Andrew Moon
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* (https://github.com/floodyberry/poly1305-donna) and released as public
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* domain. It implements SIMD vectorization based on the algorithm described in
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* http://cr.yp.to/papers.html#neoncrypto. Unrolled to 2 powers, i.e. 64 byte
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* block size. */
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#include <emmintrin.h>
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#include <stdint.h>
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#include "poly1305.h"
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#define ALIGN(x) __attribute__((aligned(x)))
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#define INLINE inline
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#define U8TO64_LE(m) (*(uint64_t*)(m))
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#define U8TO32_LE(m) (*(uint32_t*)(m))
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#define U64TO8_LE(m,v) (*(uint64_t*)(m)) = v
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typedef __m128i xmmi;
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typedef unsigned __int128 uint128_t;
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static const uint32_t ALIGN(16) poly1305_x64_sse2_message_mask[4] = {(1 << 26) - 1, 0, (1 << 26) - 1, 0};
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static const uint32_t ALIGN(16) poly1305_x64_sse2_5[4] = {5, 0, 5, 0};
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static const uint32_t ALIGN(16) poly1305_x64_sse2_1shl128[4] = {(1 << 24), 0, (1 << 24), 0};
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static uint128_t INLINE
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add128(uint128_t a, uint128_t b) {
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return a + b;
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}
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static uint128_t INLINE
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add128_64(uint128_t a, uint64_t b) {
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return a + b;
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}
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static uint128_t INLINE
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mul64x64_128(uint64_t a, uint64_t b) {
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return (uint128_t)a * b;
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}
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static uint64_t INLINE
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lo128(uint128_t a) {
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return (uint64_t)a;
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}
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static uint64_t INLINE
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shr128(uint128_t v, const int shift) {
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return (uint64_t)(v >> shift);
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}
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static uint64_t INLINE
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shr128_pair(uint64_t hi, uint64_t lo, const int shift) {
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return (uint64_t)((((uint128_t)hi << 64) | lo) >> shift);
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}
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typedef struct poly1305_power_t {
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union {
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xmmi v;
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uint64_t u[2];
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uint32_t d[4];
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} R20,R21,R22,R23,R24,S21,S22,S23,S24;
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} poly1305_power;
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typedef struct poly1305_state_internal_t {
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poly1305_power P[2]; /* 288 bytes, top 32 bit halves unused = 144 bytes of free storage */
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union {
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xmmi H[5]; /* 80 bytes */
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uint64_t HH[10];
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};
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/* uint64_t r0,r1,r2; [24 bytes] */
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/* uint64_t pad0,pad1; [16 bytes] */
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uint64_t started; /* 8 bytes */
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uint64_t leftover; /* 8 bytes */
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uint8_t buffer[64]; /* 64 bytes */
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} poly1305_state_internal; /* 448 bytes total + 63 bytes for alignment = 511 bytes raw */
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static poly1305_state_internal INLINE
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*poly1305_aligned_state(poly1305_state *state) {
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return (poly1305_state_internal *)(((uint64_t)state + 63) & ~63);
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}
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/* copy 0-63 bytes */
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static void INLINE
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poly1305_block_copy(uint8_t *dst, const uint8_t *src, size_t bytes) {
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size_t offset = src - dst;
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if (bytes & 32) {
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_mm_storeu_si128((xmmi *)(dst + 0), _mm_loadu_si128((xmmi *)(dst + offset + 0)));
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_mm_storeu_si128((xmmi *)(dst + 16), _mm_loadu_si128((xmmi *)(dst + offset + 16)));
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dst += 32;
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}
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if (bytes & 16) { _mm_storeu_si128((xmmi *)dst, _mm_loadu_si128((xmmi *)(dst + offset))); dst += 16; }
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if (bytes & 8) { *(uint64_t *)dst = *(uint64_t *)(dst + offset); dst += 8; }
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if (bytes & 4) { *(uint32_t *)dst = *(uint32_t *)(dst + offset); dst += 4; }
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if (bytes & 2) { *(uint16_t *)dst = *(uint16_t *)(dst + offset); dst += 2; }
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if (bytes & 1) { *( uint8_t *)dst = *( uint8_t *)(dst + offset); }
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}
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/* zero 0-15 bytes */
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static void INLINE
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poly1305_block_zero(uint8_t *dst, size_t bytes) {
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if (bytes & 8) { *(uint64_t *)dst = 0; dst += 8; }
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if (bytes & 4) { *(uint32_t *)dst = 0; dst += 4; }
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if (bytes & 2) { *(uint16_t *)dst = 0; dst += 2; }
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if (bytes & 1) { *( uint8_t *)dst = 0; }
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}
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static size_t INLINE
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poly1305_min(size_t a, size_t b) {
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return (a < b) ? a : b;
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}
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void
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Poly1305Init(poly1305_state *state, const unsigned char key[32]) {
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poly1305_state_internal *st = poly1305_aligned_state(state);
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poly1305_power *p;
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uint64_t r0,r1,r2;
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uint64_t t0,t1;
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/* clamp key */
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t0 = U8TO64_LE(key + 0);
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t1 = U8TO64_LE(key + 8);
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r0 = t0 & 0xffc0fffffff; t0 >>= 44; t0 |= t1 << 20;
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r1 = t0 & 0xfffffc0ffff; t1 >>= 24;
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r2 = t1 & 0x00ffffffc0f;
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/* store r in un-used space of st->P[1] */
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p = &st->P[1];
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p->R20.d[1] = (uint32_t)(r0 );
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p->R20.d[3] = (uint32_t)(r0 >> 32);
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p->R21.d[1] = (uint32_t)(r1 );
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p->R21.d[3] = (uint32_t)(r1 >> 32);
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p->R22.d[1] = (uint32_t)(r2 );
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p->R22.d[3] = (uint32_t)(r2 >> 32);
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/* store pad */
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p->R23.d[1] = U8TO32_LE(key + 16);
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p->R23.d[3] = U8TO32_LE(key + 20);
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p->R24.d[1] = U8TO32_LE(key + 24);
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p->R24.d[3] = U8TO32_LE(key + 28);
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/* H = 0 */
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st->H[0] = _mm_setzero_si128();
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st->H[1] = _mm_setzero_si128();
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st->H[2] = _mm_setzero_si128();
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st->H[3] = _mm_setzero_si128();
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st->H[4] = _mm_setzero_si128();
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st->started = 0;
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st->leftover = 0;
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}
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static void
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poly1305_first_block(poly1305_state_internal *st, const uint8_t *m) {
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const xmmi MMASK = _mm_load_si128((xmmi *)poly1305_x64_sse2_message_mask);
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const xmmi FIVE = _mm_load_si128((xmmi*)poly1305_x64_sse2_5);
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const xmmi HIBIT = _mm_load_si128((xmmi*)poly1305_x64_sse2_1shl128);
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xmmi T5,T6;
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poly1305_power *p;
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uint128_t d[3];
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uint64_t r0,r1,r2;
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uint64_t r20,r21,r22,s22;
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uint64_t pad0,pad1;
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uint64_t c;
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uint64_t i;
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/* pull out stored info */
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p = &st->P[1];
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r0 = ((uint64_t)p->R20.d[3] << 32) | (uint64_t)p->R20.d[1];
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r1 = ((uint64_t)p->R21.d[3] << 32) | (uint64_t)p->R21.d[1];
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r2 = ((uint64_t)p->R22.d[3] << 32) | (uint64_t)p->R22.d[1];
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pad0 = ((uint64_t)p->R23.d[3] << 32) | (uint64_t)p->R23.d[1];
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pad1 = ((uint64_t)p->R24.d[3] << 32) | (uint64_t)p->R24.d[1];
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/* compute powers r^2,r^4 */
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r20 = r0;
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r21 = r1;
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r22 = r2;
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for (i = 0; i < 2; i++) {
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s22 = r22 * (5 << 2);
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d[0] = add128(mul64x64_128(r20, r20), mul64x64_128(r21 * 2, s22));
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d[1] = add128(mul64x64_128(r22, s22), mul64x64_128(r20 * 2, r21));
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d[2] = add128(mul64x64_128(r21, r21), mul64x64_128(r22 * 2, r20));
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r20 = lo128(d[0]) & 0xfffffffffff; c = shr128(d[0], 44);
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d[1] = add128_64(d[1], c); r21 = lo128(d[1]) & 0xfffffffffff; c = shr128(d[1], 44);
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d[2] = add128_64(d[2], c); r22 = lo128(d[2]) & 0x3ffffffffff; c = shr128(d[2], 42);
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r20 += c * 5; c = (r20 >> 44); r20 = r20 & 0xfffffffffff;
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r21 += c;
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p->R20.v = _mm_shuffle_epi32(_mm_cvtsi32_si128((uint32_t)( r20 ) & 0x3ffffff), _MM_SHUFFLE(1,0,1,0));
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p->R21.v = _mm_shuffle_epi32(_mm_cvtsi32_si128((uint32_t)((r20 >> 26) | (r21 << 18)) & 0x3ffffff), _MM_SHUFFLE(1,0,1,0));
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p->R22.v = _mm_shuffle_epi32(_mm_cvtsi32_si128((uint32_t)((r21 >> 8) ) & 0x3ffffff), _MM_SHUFFLE(1,0,1,0));
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p->R23.v = _mm_shuffle_epi32(_mm_cvtsi32_si128((uint32_t)((r21 >> 34) | (r22 << 10)) & 0x3ffffff), _MM_SHUFFLE(1,0,1,0));
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p->R24.v = _mm_shuffle_epi32(_mm_cvtsi32_si128((uint32_t)((r22 >> 16) ) ), _MM_SHUFFLE(1,0,1,0));
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p->S21.v = _mm_mul_epu32(p->R21.v, FIVE);
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p->S22.v = _mm_mul_epu32(p->R22.v, FIVE);
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p->S23.v = _mm_mul_epu32(p->R23.v, FIVE);
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p->S24.v = _mm_mul_epu32(p->R24.v, FIVE);
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p--;
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}
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/* put saved info back */
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p = &st->P[1];
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p->R20.d[1] = (uint32_t)(r0 );
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p->R20.d[3] = (uint32_t)(r0 >> 32);
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p->R21.d[1] = (uint32_t)(r1 );
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p->R21.d[3] = (uint32_t)(r1 >> 32);
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p->R22.d[1] = (uint32_t)(r2 );
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p->R22.d[3] = (uint32_t)(r2 >> 32);
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p->R23.d[1] = (uint32_t)(pad0 );
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p->R23.d[3] = (uint32_t)(pad0 >> 32);
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p->R24.d[1] = (uint32_t)(pad1 );
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p->R24.d[3] = (uint32_t)(pad1 >> 32);
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/* H = [Mx,My] */
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T5 = _mm_unpacklo_epi64(_mm_loadl_epi64((xmmi *)(m + 0)), _mm_loadl_epi64((xmmi *)(m + 16)));
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T6 = _mm_unpacklo_epi64(_mm_loadl_epi64((xmmi *)(m + 8)), _mm_loadl_epi64((xmmi *)(m + 24)));
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st->H[0] = _mm_and_si128(MMASK, T5);
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st->H[1] = _mm_and_si128(MMASK, _mm_srli_epi64(T5, 26));
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T5 = _mm_or_si128(_mm_srli_epi64(T5, 52), _mm_slli_epi64(T6, 12));
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st->H[2] = _mm_and_si128(MMASK, T5);
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st->H[3] = _mm_and_si128(MMASK, _mm_srli_epi64(T5, 26));
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st->H[4] = _mm_or_si128(_mm_srli_epi64(T6, 40), HIBIT);
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}
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static void
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poly1305_blocks(poly1305_state_internal *st, const uint8_t *m, size_t bytes) {
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const xmmi MMASK = _mm_load_si128((xmmi *)poly1305_x64_sse2_message_mask);
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const xmmi FIVE = _mm_load_si128((xmmi*)poly1305_x64_sse2_5);
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const xmmi HIBIT = _mm_load_si128((xmmi*)poly1305_x64_sse2_1shl128);
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poly1305_power *p;
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xmmi H0,H1,H2,H3,H4;
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xmmi T0,T1,T2,T3,T4,T5,T6;
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xmmi M0,M1,M2,M3,M4;
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xmmi C1,C2;
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H0 = st->H[0];
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H1 = st->H[1];
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H2 = st->H[2];
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H3 = st->H[3];
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H4 = st->H[4];
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while (bytes >= 64) {
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/* H *= [r^4,r^4] */
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p = &st->P[0];
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T0 = _mm_mul_epu32(H0, p->R20.v);
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T1 = _mm_mul_epu32(H0, p->R21.v);
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T2 = _mm_mul_epu32(H0, p->R22.v);
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T3 = _mm_mul_epu32(H0, p->R23.v);
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T4 = _mm_mul_epu32(H0, p->R24.v);
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T5 = _mm_mul_epu32(H1, p->S24.v); T6 = _mm_mul_epu32(H1, p->R20.v); T0 = _mm_add_epi64(T0, T5); T1 = _mm_add_epi64(T1, T6);
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T5 = _mm_mul_epu32(H2, p->S23.v); T6 = _mm_mul_epu32(H2, p->S24.v); T0 = _mm_add_epi64(T0, T5); T1 = _mm_add_epi64(T1, T6);
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T5 = _mm_mul_epu32(H3, p->S22.v); T6 = _mm_mul_epu32(H3, p->S23.v); T0 = _mm_add_epi64(T0, T5); T1 = _mm_add_epi64(T1, T6);
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T5 = _mm_mul_epu32(H4, p->S21.v); T6 = _mm_mul_epu32(H4, p->S22.v); T0 = _mm_add_epi64(T0, T5); T1 = _mm_add_epi64(T1, T6);
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T5 = _mm_mul_epu32(H1, p->R21.v); T6 = _mm_mul_epu32(H1, p->R22.v); T2 = _mm_add_epi64(T2, T5); T3 = _mm_add_epi64(T3, T6);
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T5 = _mm_mul_epu32(H2, p->R20.v); T6 = _mm_mul_epu32(H2, p->R21.v); T2 = _mm_add_epi64(T2, T5); T3 = _mm_add_epi64(T3, T6);
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T5 = _mm_mul_epu32(H3, p->S24.v); T6 = _mm_mul_epu32(H3, p->R20.v); T2 = _mm_add_epi64(T2, T5); T3 = _mm_add_epi64(T3, T6);
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T5 = _mm_mul_epu32(H4, p->S23.v); T6 = _mm_mul_epu32(H4, p->S24.v); T2 = _mm_add_epi64(T2, T5); T3 = _mm_add_epi64(T3, T6);
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T5 = _mm_mul_epu32(H1, p->R23.v); T4 = _mm_add_epi64(T4, T5);
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T5 = _mm_mul_epu32(H2, p->R22.v); T4 = _mm_add_epi64(T4, T5);
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T5 = _mm_mul_epu32(H3, p->R21.v); T4 = _mm_add_epi64(T4, T5);
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T5 = _mm_mul_epu32(H4, p->R20.v); T4 = _mm_add_epi64(T4, T5);
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/* H += [Mx,My]*[r^2,r^2] */
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T5 = _mm_unpacklo_epi64(_mm_loadl_epi64((xmmi *)(m + 0)), _mm_loadl_epi64((xmmi *)(m + 16)));
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T6 = _mm_unpacklo_epi64(_mm_loadl_epi64((xmmi *)(m + 8)), _mm_loadl_epi64((xmmi *)(m + 24)));
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M0 = _mm_and_si128(MMASK, T5);
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M1 = _mm_and_si128(MMASK, _mm_srli_epi64(T5, 26));
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T5 = _mm_or_si128(_mm_srli_epi64(T5, 52), _mm_slli_epi64(T6, 12));
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M2 = _mm_and_si128(MMASK, T5);
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M3 = _mm_and_si128(MMASK, _mm_srli_epi64(T5, 26));
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M4 = _mm_or_si128(_mm_srli_epi64(T6, 40), HIBIT);
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p = &st->P[1];
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T5 = _mm_mul_epu32(M0, p->R20.v); T6 = _mm_mul_epu32(M0, p->R21.v); T0 = _mm_add_epi64(T0, T5); T1 = _mm_add_epi64(T1, T6);
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T5 = _mm_mul_epu32(M1, p->S24.v); T6 = _mm_mul_epu32(M1, p->R20.v); T0 = _mm_add_epi64(T0, T5); T1 = _mm_add_epi64(T1, T6);
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T5 = _mm_mul_epu32(M2, p->S23.v); T6 = _mm_mul_epu32(M2, p->S24.v); T0 = _mm_add_epi64(T0, T5); T1 = _mm_add_epi64(T1, T6);
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T5 = _mm_mul_epu32(M3, p->S22.v); T6 = _mm_mul_epu32(M3, p->S23.v); T0 = _mm_add_epi64(T0, T5); T1 = _mm_add_epi64(T1, T6);
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T5 = _mm_mul_epu32(M4, p->S21.v); T6 = _mm_mul_epu32(M4, p->S22.v); T0 = _mm_add_epi64(T0, T5); T1 = _mm_add_epi64(T1, T6);
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T5 = _mm_mul_epu32(M0, p->R22.v); T6 = _mm_mul_epu32(M0, p->R23.v); T2 = _mm_add_epi64(T2, T5); T3 = _mm_add_epi64(T3, T6);
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T5 = _mm_mul_epu32(M1, p->R21.v); T6 = _mm_mul_epu32(M1, p->R22.v); T2 = _mm_add_epi64(T2, T5); T3 = _mm_add_epi64(T3, T6);
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T5 = _mm_mul_epu32(M2, p->R20.v); T6 = _mm_mul_epu32(M2, p->R21.v); T2 = _mm_add_epi64(T2, T5); T3 = _mm_add_epi64(T3, T6);
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T5 = _mm_mul_epu32(M3, p->S24.v); T6 = _mm_mul_epu32(M3, p->R20.v); T2 = _mm_add_epi64(T2, T5); T3 = _mm_add_epi64(T3, T6);
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T5 = _mm_mul_epu32(M4, p->S23.v); T6 = _mm_mul_epu32(M4, p->S24.v); T2 = _mm_add_epi64(T2, T5); T3 = _mm_add_epi64(T3, T6);
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T5 = _mm_mul_epu32(M0, p->R24.v); T4 = _mm_add_epi64(T4, T5);
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T5 = _mm_mul_epu32(M1, p->R23.v); T4 = _mm_add_epi64(T4, T5);
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T5 = _mm_mul_epu32(M2, p->R22.v); T4 = _mm_add_epi64(T4, T5);
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T5 = _mm_mul_epu32(M3, p->R21.v); T4 = _mm_add_epi64(T4, T5);
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T5 = _mm_mul_epu32(M4, p->R20.v); T4 = _mm_add_epi64(T4, T5);
|
|
|
|
/* H += [Mx,My] */
|
|
T5 = _mm_unpacklo_epi64(_mm_loadl_epi64((xmmi *)(m + 32)), _mm_loadl_epi64((xmmi *)(m + 48)));
|
|
T6 = _mm_unpacklo_epi64(_mm_loadl_epi64((xmmi *)(m + 40)), _mm_loadl_epi64((xmmi *)(m + 56)));
|
|
M0 = _mm_and_si128(MMASK, T5);
|
|
M1 = _mm_and_si128(MMASK, _mm_srli_epi64(T5, 26));
|
|
T5 = _mm_or_si128(_mm_srli_epi64(T5, 52), _mm_slli_epi64(T6, 12));
|
|
M2 = _mm_and_si128(MMASK, T5);
|
|
M3 = _mm_and_si128(MMASK, _mm_srli_epi64(T5, 26));
|
|
M4 = _mm_or_si128(_mm_srli_epi64(T6, 40), HIBIT);
|
|
|
|
T0 = _mm_add_epi64(T0, M0);
|
|
T1 = _mm_add_epi64(T1, M1);
|
|
T2 = _mm_add_epi64(T2, M2);
|
|
T3 = _mm_add_epi64(T3, M3);
|
|
T4 = _mm_add_epi64(T4, M4);
|
|
|
|
/* reduce */
|
|
C1 = _mm_srli_epi64(T0, 26); C2 = _mm_srli_epi64(T3, 26); T0 = _mm_and_si128(T0, MMASK); T3 = _mm_and_si128(T3, MMASK); T1 = _mm_add_epi64(T1, C1); T4 = _mm_add_epi64(T4, C2);
|
|
C1 = _mm_srli_epi64(T1, 26); C2 = _mm_srli_epi64(T4, 26); T1 = _mm_and_si128(T1, MMASK); T4 = _mm_and_si128(T4, MMASK); T2 = _mm_add_epi64(T2, C1); T0 = _mm_add_epi64(T0, _mm_mul_epu32(C2, FIVE));
|
|
C1 = _mm_srli_epi64(T2, 26); C2 = _mm_srli_epi64(T0, 26); T2 = _mm_and_si128(T2, MMASK); T0 = _mm_and_si128(T0, MMASK); T3 = _mm_add_epi64(T3, C1); T1 = _mm_add_epi64(T1, C2);
|
|
C1 = _mm_srli_epi64(T3, 26); T3 = _mm_and_si128(T3, MMASK); T4 = _mm_add_epi64(T4, C1);
|
|
|
|
/* H = (H*[r^4,r^4] + [Mx,My]*[r^2,r^2] + [Mx,My]) */
|
|
H0 = T0;
|
|
H1 = T1;
|
|
H2 = T2;
|
|
H3 = T3;
|
|
H4 = T4;
|
|
|
|
m += 64;
|
|
bytes -= 64;
|
|
}
|
|
|
|
st->H[0] = H0;
|
|
st->H[1] = H1;
|
|
st->H[2] = H2;
|
|
st->H[3] = H3;
|
|
st->H[4] = H4;
|
|
}
|
|
|
|
static size_t
|
|
poly1305_combine(poly1305_state_internal *st, const uint8_t *m, size_t bytes) {
|
|
const xmmi MMASK = _mm_load_si128((xmmi *)poly1305_x64_sse2_message_mask);
|
|
const xmmi HIBIT = _mm_load_si128((xmmi*)poly1305_x64_sse2_1shl128);
|
|
const xmmi FIVE = _mm_load_si128((xmmi*)poly1305_x64_sse2_5);
|
|
|
|
poly1305_power *p;
|
|
xmmi H0,H1,H2,H3,H4;
|
|
xmmi M0,M1,M2,M3,M4;
|
|
xmmi T0,T1,T2,T3,T4,T5,T6;
|
|
xmmi C1,C2;
|
|
|
|
uint64_t r0,r1,r2;
|
|
uint64_t t0,t1,t2,t3,t4;
|
|
uint64_t c;
|
|
size_t consumed = 0;
|
|
|
|
H0 = st->H[0];
|
|
H1 = st->H[1];
|
|
H2 = st->H[2];
|
|
H3 = st->H[3];
|
|
H4 = st->H[4];
|
|
|
|
/* p = [r^2,r^2] */
|
|
p = &st->P[1];
|
|
|
|
if (bytes >= 32) {
|
|
/* H *= [r^2,r^2] */
|
|
T0 = _mm_mul_epu32(H0, p->R20.v);
|
|
T1 = _mm_mul_epu32(H0, p->R21.v);
|
|
T2 = _mm_mul_epu32(H0, p->R22.v);
|
|
T3 = _mm_mul_epu32(H0, p->R23.v);
|
|
T4 = _mm_mul_epu32(H0, p->R24.v);
|
|
T5 = _mm_mul_epu32(H1, p->S24.v); T6 = _mm_mul_epu32(H1, p->R20.v); T0 = _mm_add_epi64(T0, T5); T1 = _mm_add_epi64(T1, T6);
|
|
T5 = _mm_mul_epu32(H2, p->S23.v); T6 = _mm_mul_epu32(H2, p->S24.v); T0 = _mm_add_epi64(T0, T5); T1 = _mm_add_epi64(T1, T6);
|
|
T5 = _mm_mul_epu32(H3, p->S22.v); T6 = _mm_mul_epu32(H3, p->S23.v); T0 = _mm_add_epi64(T0, T5); T1 = _mm_add_epi64(T1, T6);
|
|
T5 = _mm_mul_epu32(H4, p->S21.v); T6 = _mm_mul_epu32(H4, p->S22.v); T0 = _mm_add_epi64(T0, T5); T1 = _mm_add_epi64(T1, T6);
|
|
T5 = _mm_mul_epu32(H1, p->R21.v); T6 = _mm_mul_epu32(H1, p->R22.v); T2 = _mm_add_epi64(T2, T5); T3 = _mm_add_epi64(T3, T6);
|
|
T5 = _mm_mul_epu32(H2, p->R20.v); T6 = _mm_mul_epu32(H2, p->R21.v); T2 = _mm_add_epi64(T2, T5); T3 = _mm_add_epi64(T3, T6);
|
|
T5 = _mm_mul_epu32(H3, p->S24.v); T6 = _mm_mul_epu32(H3, p->R20.v); T2 = _mm_add_epi64(T2, T5); T3 = _mm_add_epi64(T3, T6);
|
|
T5 = _mm_mul_epu32(H4, p->S23.v); T6 = _mm_mul_epu32(H4, p->S24.v); T2 = _mm_add_epi64(T2, T5); T3 = _mm_add_epi64(T3, T6);
|
|
T5 = _mm_mul_epu32(H1, p->R23.v); T4 = _mm_add_epi64(T4, T5);
|
|
T5 = _mm_mul_epu32(H2, p->R22.v); T4 = _mm_add_epi64(T4, T5);
|
|
T5 = _mm_mul_epu32(H3, p->R21.v); T4 = _mm_add_epi64(T4, T5);
|
|
T5 = _mm_mul_epu32(H4, p->R20.v); T4 = _mm_add_epi64(T4, T5);
|
|
|
|
/* H += [Mx,My] */
|
|
T5 = _mm_unpacklo_epi64(_mm_loadl_epi64((xmmi *)(m + 0)), _mm_loadl_epi64((xmmi *)(m + 16)));
|
|
T6 = _mm_unpacklo_epi64(_mm_loadl_epi64((xmmi *)(m + 8)), _mm_loadl_epi64((xmmi *)(m + 24)));
|
|
M0 = _mm_and_si128(MMASK, T5);
|
|
M1 = _mm_and_si128(MMASK, _mm_srli_epi64(T5, 26));
|
|
T5 = _mm_or_si128(_mm_srli_epi64(T5, 52), _mm_slli_epi64(T6, 12));
|
|
M2 = _mm_and_si128(MMASK, T5);
|
|
M3 = _mm_and_si128(MMASK, _mm_srli_epi64(T5, 26));
|
|
M4 = _mm_or_si128(_mm_srli_epi64(T6, 40), HIBIT);
|
|
|
|
T0 = _mm_add_epi64(T0, M0);
|
|
T1 = _mm_add_epi64(T1, M1);
|
|
T2 = _mm_add_epi64(T2, M2);
|
|
T3 = _mm_add_epi64(T3, M3);
|
|
T4 = _mm_add_epi64(T4, M4);
|
|
|
|
/* reduce */
|
|
C1 = _mm_srli_epi64(T0, 26); C2 = _mm_srli_epi64(T3, 26); T0 = _mm_and_si128(T0, MMASK); T3 = _mm_and_si128(T3, MMASK); T1 = _mm_add_epi64(T1, C1); T4 = _mm_add_epi64(T4, C2);
|
|
C1 = _mm_srli_epi64(T1, 26); C2 = _mm_srli_epi64(T4, 26); T1 = _mm_and_si128(T1, MMASK); T4 = _mm_and_si128(T4, MMASK); T2 = _mm_add_epi64(T2, C1); T0 = _mm_add_epi64(T0, _mm_mul_epu32(C2, FIVE));
|
|
C1 = _mm_srli_epi64(T2, 26); C2 = _mm_srli_epi64(T0, 26); T2 = _mm_and_si128(T2, MMASK); T0 = _mm_and_si128(T0, MMASK); T3 = _mm_add_epi64(T3, C1); T1 = _mm_add_epi64(T1, C2);
|
|
C1 = _mm_srli_epi64(T3, 26); T3 = _mm_and_si128(T3, MMASK); T4 = _mm_add_epi64(T4, C1);
|
|
|
|
/* H = (H*[r^2,r^2] + [Mx,My]) */
|
|
H0 = T0;
|
|
H1 = T1;
|
|
H2 = T2;
|
|
H3 = T3;
|
|
H4 = T4;
|
|
|
|
consumed = 32;
|
|
}
|
|
|
|
/* finalize, H *= [r^2,r] */
|
|
r0 = ((uint64_t)p->R20.d[3] << 32) | (uint64_t)p->R20.d[1];
|
|
r1 = ((uint64_t)p->R21.d[3] << 32) | (uint64_t)p->R21.d[1];
|
|
r2 = ((uint64_t)p->R22.d[3] << 32) | (uint64_t)p->R22.d[1];
|
|
|
|
p->R20.d[2] = (uint32_t)( r0 ) & 0x3ffffff;
|
|
p->R21.d[2] = (uint32_t)((r0 >> 26) | (r1 << 18)) & 0x3ffffff;
|
|
p->R22.d[2] = (uint32_t)((r1 >> 8) ) & 0x3ffffff;
|
|
p->R23.d[2] = (uint32_t)((r1 >> 34) | (r2 << 10)) & 0x3ffffff;
|
|
p->R24.d[2] = (uint32_t)((r2 >> 16) ) ;
|
|
p->S21.d[2] = p->R21.d[2] * 5;
|
|
p->S22.d[2] = p->R22.d[2] * 5;
|
|
p->S23.d[2] = p->R23.d[2] * 5;
|
|
p->S24.d[2] = p->R24.d[2] * 5;
|
|
|
|
/* H *= [r^2,r] */
|
|
T0 = _mm_mul_epu32(H0, p->R20.v);
|
|
T1 = _mm_mul_epu32(H0, p->R21.v);
|
|
T2 = _mm_mul_epu32(H0, p->R22.v);
|
|
T3 = _mm_mul_epu32(H0, p->R23.v);
|
|
T4 = _mm_mul_epu32(H0, p->R24.v);
|
|
T5 = _mm_mul_epu32(H1, p->S24.v); T6 = _mm_mul_epu32(H1, p->R20.v); T0 = _mm_add_epi64(T0, T5); T1 = _mm_add_epi64(T1, T6);
|
|
T5 = _mm_mul_epu32(H2, p->S23.v); T6 = _mm_mul_epu32(H2, p->S24.v); T0 = _mm_add_epi64(T0, T5); T1 = _mm_add_epi64(T1, T6);
|
|
T5 = _mm_mul_epu32(H3, p->S22.v); T6 = _mm_mul_epu32(H3, p->S23.v); T0 = _mm_add_epi64(T0, T5); T1 = _mm_add_epi64(T1, T6);
|
|
T5 = _mm_mul_epu32(H4, p->S21.v); T6 = _mm_mul_epu32(H4, p->S22.v); T0 = _mm_add_epi64(T0, T5); T1 = _mm_add_epi64(T1, T6);
|
|
T5 = _mm_mul_epu32(H1, p->R21.v); T6 = _mm_mul_epu32(H1, p->R22.v); T2 = _mm_add_epi64(T2, T5); T3 = _mm_add_epi64(T3, T6);
|
|
T5 = _mm_mul_epu32(H2, p->R20.v); T6 = _mm_mul_epu32(H2, p->R21.v); T2 = _mm_add_epi64(T2, T5); T3 = _mm_add_epi64(T3, T6);
|
|
T5 = _mm_mul_epu32(H3, p->S24.v); T6 = _mm_mul_epu32(H3, p->R20.v); T2 = _mm_add_epi64(T2, T5); T3 = _mm_add_epi64(T3, T6);
|
|
T5 = _mm_mul_epu32(H4, p->S23.v); T6 = _mm_mul_epu32(H4, p->S24.v); T2 = _mm_add_epi64(T2, T5); T3 = _mm_add_epi64(T3, T6);
|
|
T5 = _mm_mul_epu32(H1, p->R23.v); T4 = _mm_add_epi64(T4, T5);
|
|
T5 = _mm_mul_epu32(H2, p->R22.v); T4 = _mm_add_epi64(T4, T5);
|
|
T5 = _mm_mul_epu32(H3, p->R21.v); T4 = _mm_add_epi64(T4, T5);
|
|
T5 = _mm_mul_epu32(H4, p->R20.v); T4 = _mm_add_epi64(T4, T5);
|
|
|
|
C1 = _mm_srli_epi64(T0, 26); C2 = _mm_srli_epi64(T3, 26); T0 = _mm_and_si128(T0, MMASK); T3 = _mm_and_si128(T3, MMASK); T1 = _mm_add_epi64(T1, C1); T4 = _mm_add_epi64(T4, C2);
|
|
C1 = _mm_srli_epi64(T1, 26); C2 = _mm_srli_epi64(T4, 26); T1 = _mm_and_si128(T1, MMASK); T4 = _mm_and_si128(T4, MMASK); T2 = _mm_add_epi64(T2, C1); T0 = _mm_add_epi64(T0, _mm_mul_epu32(C2, FIVE));
|
|
C1 = _mm_srli_epi64(T2, 26); C2 = _mm_srli_epi64(T0, 26); T2 = _mm_and_si128(T2, MMASK); T0 = _mm_and_si128(T0, MMASK); T3 = _mm_add_epi64(T3, C1); T1 = _mm_add_epi64(T1, C2);
|
|
C1 = _mm_srli_epi64(T3, 26); T3 = _mm_and_si128(T3, MMASK); T4 = _mm_add_epi64(T4, C1);
|
|
|
|
/* H = H[0]+H[1] */
|
|
H0 = _mm_add_epi64(T0, _mm_srli_si128(T0, 8));
|
|
H1 = _mm_add_epi64(T1, _mm_srli_si128(T1, 8));
|
|
H2 = _mm_add_epi64(T2, _mm_srli_si128(T2, 8));
|
|
H3 = _mm_add_epi64(T3, _mm_srli_si128(T3, 8));
|
|
H4 = _mm_add_epi64(T4, _mm_srli_si128(T4, 8));
|
|
|
|
t0 = _mm_cvtsi128_si32(H0) ; c = (t0 >> 26); t0 &= 0x3ffffff;
|
|
t1 = _mm_cvtsi128_si32(H1) + c; c = (t1 >> 26); t1 &= 0x3ffffff;
|
|
t2 = _mm_cvtsi128_si32(H2) + c; c = (t2 >> 26); t2 &= 0x3ffffff;
|
|
t3 = _mm_cvtsi128_si32(H3) + c; c = (t3 >> 26); t3 &= 0x3ffffff;
|
|
t4 = _mm_cvtsi128_si32(H4) + c; c = (t4 >> 26); t4 &= 0x3ffffff;
|
|
t0 = t0 + (c * 5); c = (t0 >> 26); t0 &= 0x3ffffff;
|
|
t1 = t1 + c;
|
|
|
|
st->HH[0] = ((t0 ) | (t1 << 26) ) & 0xfffffffffffull;
|
|
st->HH[1] = ((t1 >> 18) | (t2 << 8) | (t3 << 34)) & 0xfffffffffffull;
|
|
st->HH[2] = ((t3 >> 10) | (t4 << 16) ) & 0x3ffffffffffull;
|
|
|
|
return consumed;
|
|
}
|
|
|
|
void
|
|
Poly1305Update(poly1305_state *state, const unsigned char *m, size_t bytes) {
|
|
poly1305_state_internal *st = poly1305_aligned_state(state);
|
|
size_t want;
|
|
|
|
/* need at least 32 initial bytes to start the accelerated branch */
|
|
if (!st->started) {
|
|
if ((st->leftover == 0) && (bytes > 32)) {
|
|
poly1305_first_block(st, m);
|
|
m += 32;
|
|
bytes -= 32;
|
|
} else {
|
|
want = poly1305_min(32 - st->leftover, bytes);
|
|
poly1305_block_copy(st->buffer + st->leftover, m, want);
|
|
bytes -= want;
|
|
m += want;
|
|
st->leftover += want;
|
|
if ((st->leftover < 32) || (bytes == 0))
|
|
return;
|
|
poly1305_first_block(st, st->buffer);
|
|
st->leftover = 0;
|
|
}
|
|
st->started = 1;
|
|
}
|
|
|
|
/* handle leftover */
|
|
if (st->leftover) {
|
|
want = poly1305_min(64 - st->leftover, bytes);
|
|
poly1305_block_copy(st->buffer + st->leftover, m, want);
|
|
bytes -= want;
|
|
m += want;
|
|
st->leftover += want;
|
|
if (st->leftover < 64)
|
|
return;
|
|
poly1305_blocks(st, st->buffer, 64);
|
|
st->leftover = 0;
|
|
}
|
|
|
|
/* process 64 byte blocks */
|
|
if (bytes >= 64) {
|
|
want = (bytes & ~63);
|
|
poly1305_blocks(st, m, want);
|
|
m += want;
|
|
bytes -= want;
|
|
}
|
|
|
|
if (bytes) {
|
|
poly1305_block_copy(st->buffer + st->leftover, m, bytes);
|
|
st->leftover += bytes;
|
|
}
|
|
}
|
|
|
|
void
|
|
Poly1305Finish(poly1305_state *state, unsigned char mac[16]) {
|
|
poly1305_state_internal *st = poly1305_aligned_state(state);
|
|
size_t leftover = st->leftover;
|
|
uint8_t *m = st->buffer;
|
|
uint128_t d[3];
|
|
uint64_t h0,h1,h2;
|
|
uint64_t t0,t1;
|
|
uint64_t g0,g1,g2,c,nc;
|
|
uint64_t r0,r1,r2,s1,s2;
|
|
poly1305_power *p;
|
|
|
|
if (st->started) {
|
|
size_t consumed = poly1305_combine(st, m, leftover);
|
|
leftover -= consumed;
|
|
m += consumed;
|
|
}
|
|
|
|
/* st->HH will either be 0 or have the combined result */
|
|
h0 = st->HH[0];
|
|
h1 = st->HH[1];
|
|
h2 = st->HH[2];
|
|
|
|
p = &st->P[1];
|
|
r0 = ((uint64_t)p->R20.d[3] << 32) | (uint64_t)p->R20.d[1];
|
|
r1 = ((uint64_t)p->R21.d[3] << 32) | (uint64_t)p->R21.d[1];
|
|
r2 = ((uint64_t)p->R22.d[3] << 32) | (uint64_t)p->R22.d[1];
|
|
s1 = r1 * (5 << 2);
|
|
s2 = r2 * (5 << 2);
|
|
|
|
if (leftover < 16)
|
|
goto poly1305_donna_atmost15bytes;
|
|
|
|
poly1305_donna_atleast16bytes:
|
|
t0 = U8TO64_LE(m + 0);
|
|
t1 = U8TO64_LE(m + 8);
|
|
h0 += t0 & 0xfffffffffff;
|
|
t0 = shr128_pair(t1, t0, 44);
|
|
h1 += t0 & 0xfffffffffff;
|
|
h2 += (t1 >> 24) | ((uint64_t)1 << 40);
|
|
|
|
poly1305_donna_mul:
|
|
d[0] = add128(add128(mul64x64_128(h0, r0), mul64x64_128(h1, s2)), mul64x64_128(h2, s1));
|
|
d[1] = add128(add128(mul64x64_128(h0, r1), mul64x64_128(h1, r0)), mul64x64_128(h2, s2));
|
|
d[2] = add128(add128(mul64x64_128(h0, r2), mul64x64_128(h1, r1)), mul64x64_128(h2, r0));
|
|
h0 = lo128(d[0]) & 0xfffffffffff; c = shr128(d[0], 44);
|
|
d[1] = add128_64(d[1], c); h1 = lo128(d[1]) & 0xfffffffffff; c = shr128(d[1], 44);
|
|
d[2] = add128_64(d[2], c); h2 = lo128(d[2]) & 0x3ffffffffff; c = shr128(d[2], 42);
|
|
h0 += c * 5;
|
|
|
|
m += 16;
|
|
leftover -= 16;
|
|
if (leftover >= 16) goto poly1305_donna_atleast16bytes;
|
|
|
|
/* final bytes */
|
|
poly1305_donna_atmost15bytes:
|
|
if (!leftover) goto poly1305_donna_finish;
|
|
|
|
m[leftover++] = 1;
|
|
poly1305_block_zero(m + leftover, 16 - leftover);
|
|
leftover = 16;
|
|
|
|
t0 = U8TO64_LE(m+0);
|
|
t1 = U8TO64_LE(m+8);
|
|
h0 += t0 & 0xfffffffffff; t0 = shr128_pair(t1, t0, 44);
|
|
h1 += t0 & 0xfffffffffff;
|
|
h2 += (t1 >> 24);
|
|
|
|
goto poly1305_donna_mul;
|
|
|
|
poly1305_donna_finish:
|
|
c = (h0 >> 44); h0 &= 0xfffffffffff;
|
|
h1 += c; c = (h1 >> 44); h1 &= 0xfffffffffff;
|
|
h2 += c; c = (h2 >> 42); h2 &= 0x3ffffffffff;
|
|
h0 += c * 5;
|
|
|
|
g0 = h0 + 5; c = (g0 >> 44); g0 &= 0xfffffffffff;
|
|
g1 = h1 + c; c = (g1 >> 44); g1 &= 0xfffffffffff;
|
|
g2 = h2 + c - ((uint64_t)1 << 42);
|
|
|
|
c = (g2 >> 63) - 1;
|
|
nc = ~c;
|
|
h0 = (h0 & nc) | (g0 & c);
|
|
h1 = (h1 & nc) | (g1 & c);
|
|
h2 = (h2 & nc) | (g2 & c);
|
|
|
|
/* pad */
|
|
t0 = ((uint64_t)p->R23.d[3] << 32) | (uint64_t)p->R23.d[1];
|
|
t1 = ((uint64_t)p->R24.d[3] << 32) | (uint64_t)p->R24.d[1];
|
|
h0 += (t0 & 0xfffffffffff) ; c = (h0 >> 44); h0 &= 0xfffffffffff; t0 = shr128_pair(t1, t0, 44);
|
|
h1 += (t0 & 0xfffffffffff) + c; c = (h1 >> 44); h1 &= 0xfffffffffff; t1 = (t1 >> 24);
|
|
h2 += (t1 ) + c;
|
|
|
|
U64TO8_LE(mac + 0, ((h0 ) | (h1 << 44)));
|
|
U64TO8_LE(mac + 8, ((h1 >> 20) | (h2 << 24)));
|
|
}
|