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|
#include <stdint.h>
#include <string.h>
#include "../onetimeauth_poly1305.h"
#include "crypto_verify_16.h"
#include "poly1305_sse2.h"
#include "private/common.h"
#include "private/sse2_64_32.h"
#include "utils.h"
#if defined(HAVE_TI_MODE) && defined(HAVE_EMMINTRIN_H)
# ifdef __GNUC__
# pragma GCC target("sse2")
# endif
# include <emmintrin.h>
typedef __m128i xmmi;
# if defined(_MSC_VER)
# define POLY1305_NOINLINE __declspec(noinline)
# elif defined(__clang__) || defined(__GNUC__)
# define POLY1305_NOINLINE __attribute__((noinline))
# else
# define POLY1305_NOINLINE
# endif
# define poly1305_block_size 32
enum poly1305_state_flags_t {
poly1305_started = 1,
poly1305_final_shift8 = 4,
poly1305_final_shift16 = 8,
poly1305_final_r2_r = 16, /* use [r^2,r] for the final block */
poly1305_final_r_1 = 32 /* use [r,1] for the final block */
};
typedef struct poly1305_state_internal_t {
union {
uint64_t h[3];
uint32_t hh[10];
} H; /* 40 bytes */
uint32_t R[5]; /* 20 bytes */
uint32_t R2[5]; /* 20 bytes */
uint32_t R4[5]; /* 20 bytes */
uint64_t pad[2]; /* 16 bytes */
uint64_t flags; /* 8 bytes */
unsigned long long leftover; /* 8 bytes */
unsigned char buffer[poly1305_block_size]; /* 32 bytes */
} poly1305_state_internal_t; /* 164 bytes total */
/*
* _mm_loadl_epi64() is turned into a simple MOVQ. So, unaligned accesses are
* totally fine, even though this intrinsic requires a __m128i* input.
* This confuses dynamic analysis, so force alignment, only in debug mode.
*/
# ifdef DEBUG
static xmmi
_fakealign_mm_loadl_epi64(const void *m)
{
xmmi tmp;
memcpy(&tmp, m, 8);
return _mm_loadl_epi64(&tmp);
}
# define _mm_loadl_epi64(X) _fakealign_mm_loadl_epi64(X)
#endif
/* copy 0-31 bytes */
static inline void
poly1305_block_copy31(unsigned char *dst, const unsigned char *src,
unsigned long long bytes)
{
if (bytes & 16) {
_mm_store_si128((xmmi *) (void *) dst,
_mm_loadu_si128((const xmmi *) (const void *) src));
src += 16;
dst += 16;
}
if (bytes & 8) {
memcpy(dst, src, 8);
src += 8;
dst += 8;
}
if (bytes & 4) {
memcpy(dst, src, 4);
src += 4;
dst += 4;
}
if (bytes & 2) {
memcpy(dst, src, 2);
src += 2;
dst += 2;
}
if (bytes & 1) {
*dst = *src;
}
}
static POLY1305_NOINLINE void
poly1305_init_ext(poly1305_state_internal_t *st, const unsigned char key[32],
unsigned long long bytes)
{
uint32_t *R;
uint128_t d[3];
uint64_t r0, r1, r2;
uint64_t rt0, rt1, rt2, st2, c;
uint64_t t0, t1;
unsigned long long i;
if (!bytes) {
bytes = ~(unsigned long long) 0;
}
/* H = 0 */
_mm_storeu_si128((xmmi *) (void *) &st->H.hh[0], _mm_setzero_si128());
_mm_storeu_si128((xmmi *) (void *) &st->H.hh[4], _mm_setzero_si128());
_mm_storeu_si128((xmmi *) (void *) &st->H.hh[8], _mm_setzero_si128());
/* clamp key */
memcpy(&t0, key, 8);
memcpy(&t1, key + 8, 8);
r0 = t0 & 0xffc0fffffff;
t0 >>= 44;
t0 |= t1 << 20;
r1 = t0 & 0xfffffc0ffff;
t1 >>= 24;
r2 = t1 & 0x00ffffffc0f;
/* r^1 */
R = st->R;
R[0] = (uint32_t)(r0) &0x3ffffff;
R[1] = (uint32_t)((r0 >> 26) | (r1 << 18)) & 0x3ffffff;
R[2] = (uint32_t)((r1 >> 8)) & 0x3ffffff;
R[3] = (uint32_t)((r1 >> 34) | (r2 << 10)) & 0x3ffffff;
R[4] = (uint32_t)((r2 >> 16));
/* save pad */
memcpy(&st->pad[0], key + 16, 8);
memcpy(&st->pad[1], key + 24, 8);
rt0 = r0;
rt1 = r1;
rt2 = r2;
/* r^2, r^4 */
for (i = 0; i < 2; i++) {
if (i == 0) {
R = st->R2;
if (bytes <= 16) {
break;
}
} else if (i == 1) {
R = st->R4;
if (bytes < 96) {
break;
}
}
st2 = rt2 * (5 << 2);
d[0] = ((uint128_t) rt0 * rt0) + ((uint128_t)(rt1 * 2) * st2);
d[1] = ((uint128_t) rt2 * st2) + ((uint128_t)(rt0 * 2) * rt1);
d[2] = ((uint128_t) rt1 * rt1) + ((uint128_t)(rt2 * 2) * rt0);
rt0 = (uint64_t) d[0] & 0xfffffffffff;
c = (uint64_t)(d[0] >> 44);
d[1] += c;
rt1 = (uint64_t) d[1] & 0xfffffffffff;
c = (uint64_t)(d[1] >> 44);
d[2] += c;
rt2 = (uint64_t) d[2] & 0x3ffffffffff;
c = (uint64_t)(d[2] >> 42);
rt0 += c * 5;
c = (rt0 >> 44);
rt0 = rt0 & 0xfffffffffff;
rt1 += c;
c = (rt1 >> 44);
rt1 = rt1 & 0xfffffffffff;
rt2 += c; /* even if rt2 overflows, it will still fit in rp4 safely, and
is safe to multiply with */
R[0] = (uint32_t)(rt0) &0x3ffffff;
R[1] = (uint32_t)((rt0 >> 26) | (rt1 << 18)) & 0x3ffffff;
R[2] = (uint32_t)((rt1 >> 8)) & 0x3ffffff;
R[3] = (uint32_t)((rt1 >> 34) | (rt2 << 10)) & 0x3ffffff;
R[4] = (uint32_t)((rt2 >> 16));
}
st->flags = 0;
st->leftover = 0U;
}
static POLY1305_NOINLINE void
poly1305_blocks(poly1305_state_internal_t *st, const unsigned char *m,
unsigned long long bytes)
{
CRYPTO_ALIGN(64)
xmmi HIBIT =
_mm_shuffle_epi32(_mm_cvtsi32_si128(1 << 24), _MM_SHUFFLE(1, 0, 1, 0));
const xmmi MMASK = _mm_shuffle_epi32(_mm_cvtsi32_si128((1 << 26) - 1),
_MM_SHUFFLE(1, 0, 1, 0));
const xmmi FIVE =
_mm_shuffle_epi32(_mm_cvtsi32_si128(5), _MM_SHUFFLE(1, 0, 1, 0));
xmmi H0, H1, H2, H3, H4;
xmmi T0, T1, T2, T3, T4, T5, T6, T7, T8;
xmmi M0, M1, M2, M3, M4;
xmmi M5, M6, M7, M8;
xmmi C1, C2;
xmmi R20, R21, R22, R23, R24, S21, S22, S23, S24;
xmmi R40, R41, R42, R43, R44, S41, S42, S43, S44;
if (st->flags & poly1305_final_shift8) {
HIBIT = _mm_srli_si128(HIBIT, 8);
}
if (st->flags & poly1305_final_shift16) {
HIBIT = _mm_setzero_si128();
}
if (!(st->flags & poly1305_started)) {
/* H = [Mx,My] */
T5 = _mm_unpacklo_epi64(
_mm_loadl_epi64((const xmmi *) (const void *) (m + 0)),
_mm_loadl_epi64((const xmmi *) (const void *) (m + 16)));
T6 = _mm_unpacklo_epi64(
_mm_loadl_epi64((const xmmi *) (const void *) (m + 8)),
_mm_loadl_epi64((const xmmi *) (const void *) (m + 24)));
H0 = _mm_and_si128(MMASK, T5);
H1 = _mm_and_si128(MMASK, _mm_srli_epi64(T5, 26));
T5 = _mm_or_si128(_mm_srli_epi64(T5, 52), _mm_slli_epi64(T6, 12));
H2 = _mm_and_si128(MMASK, T5);
H3 = _mm_and_si128(MMASK, _mm_srli_epi64(T5, 26));
H4 = _mm_srli_epi64(T6, 40);
H4 = _mm_or_si128(H4, HIBIT);
m += 32;
bytes -= 32;
st->flags |= poly1305_started;
} else {
T0 = _mm_loadu_si128((const xmmi *) (const void *) &st->H.hh[0]);
T1 = _mm_loadu_si128((const xmmi *) (const void *) &st->H.hh[4]);
T2 = _mm_loadu_si128((const xmmi *) (const void *) &st->H.hh[8]);
H0 = _mm_shuffle_epi32(T0, _MM_SHUFFLE(1, 1, 0, 0));
H1 = _mm_shuffle_epi32(T0, _MM_SHUFFLE(3, 3, 2, 2));
H2 = _mm_shuffle_epi32(T1, _MM_SHUFFLE(1, 1, 0, 0));
H3 = _mm_shuffle_epi32(T1, _MM_SHUFFLE(3, 3, 2, 2));
H4 = _mm_shuffle_epi32(T2, _MM_SHUFFLE(1, 1, 0, 0));
}
if (st->flags & (poly1305_final_r2_r | poly1305_final_r_1)) {
if (st->flags & poly1305_final_r2_r) {
/* use [r^2, r] */
T2 = _mm_loadu_si128((const xmmi *) (const void *) &st->R[0]);
T3 = _mm_cvtsi32_si128(st->R[4]);
T0 = _mm_loadu_si128((const xmmi *) (const void *) &st->R2[0]);
T1 = _mm_cvtsi32_si128(st->R2[4]);
T4 = _mm_unpacklo_epi32(T0, T2);
T5 = _mm_unpackhi_epi32(T0, T2);
R24 = _mm_unpacklo_epi64(T1, T3);
} else {
/* use [r^1, 1] */
T0 = _mm_loadu_si128((const xmmi *) (const void *) &st->R[0]);
T1 = _mm_cvtsi32_si128(st->R[4]);
T2 = _mm_cvtsi32_si128(1);
T4 = _mm_unpacklo_epi32(T0, T2);
T5 = _mm_unpackhi_epi32(T0, T2);
R24 = T1;
}
R20 = _mm_shuffle_epi32(T4, _MM_SHUFFLE(1, 1, 0, 0));
R21 = _mm_shuffle_epi32(T4, _MM_SHUFFLE(3, 3, 2, 2));
R22 = _mm_shuffle_epi32(T5, _MM_SHUFFLE(1, 1, 0, 0));
R23 = _mm_shuffle_epi32(T5, _MM_SHUFFLE(3, 3, 2, 2));
} else {
/* use [r^2, r^2] */
T0 = _mm_loadu_si128((const xmmi *) (const void *) &st->R2[0]);
T1 = _mm_cvtsi32_si128(st->R2[4]);
R20 = _mm_shuffle_epi32(T0, _MM_SHUFFLE(0, 0, 0, 0));
R21 = _mm_shuffle_epi32(T0, _MM_SHUFFLE(1, 1, 1, 1));
R22 = _mm_shuffle_epi32(T0, _MM_SHUFFLE(2, 2, 2, 2));
R23 = _mm_shuffle_epi32(T0, _MM_SHUFFLE(3, 3, 3, 3));
R24 = _mm_shuffle_epi32(T1, _MM_SHUFFLE(0, 0, 0, 0));
}
S21 = _mm_mul_epu32(R21, FIVE);
S22 = _mm_mul_epu32(R22, FIVE);
S23 = _mm_mul_epu32(R23, FIVE);
S24 = _mm_mul_epu32(R24, FIVE);
if (bytes >= 64) {
T0 = _mm_loadu_si128((const xmmi *) (const void *) &st->R4[0]);
T1 = _mm_cvtsi32_si128(st->R4[4]);
R40 = _mm_shuffle_epi32(T0, _MM_SHUFFLE(0, 0, 0, 0));
R41 = _mm_shuffle_epi32(T0, _MM_SHUFFLE(1, 1, 1, 1));
R42 = _mm_shuffle_epi32(T0, _MM_SHUFFLE(2, 2, 2, 2));
R43 = _mm_shuffle_epi32(T0, _MM_SHUFFLE(3, 3, 3, 3));
R44 = _mm_shuffle_epi32(T1, _MM_SHUFFLE(0, 0, 0, 0));
S41 = _mm_mul_epu32(R41, FIVE);
S42 = _mm_mul_epu32(R42, FIVE);
S43 = _mm_mul_epu32(R43, FIVE);
S44 = _mm_mul_epu32(R44, FIVE);
while (bytes >= 64) {
xmmi v00, v01, v02, v03, v04;
xmmi v10, v11, v12, v13, v14;
xmmi v20, v21, v22, v23, v24;
xmmi v30, v31, v32, v33, v34;
xmmi v40, v41, v42, v43, v44;
xmmi T14, T15;
/* H *= [r^4,r^4], preload [Mx,My] */
T15 = S42;
T0 = H4;
T0 = _mm_mul_epu32(T0, S41);
v01 = H3;
v01 = _mm_mul_epu32(v01, T15);
T14 = S43;
T1 = H4;
T1 = _mm_mul_epu32(T1, T15);
v11 = H3;
v11 = _mm_mul_epu32(v11, T14);
T2 = H4;
T2 = _mm_mul_epu32(T2, T14);
T0 = _mm_add_epi64(T0, v01);
T15 = S44;
v02 = H2;
v02 = _mm_mul_epu32(v02, T14);
T3 = H4;
T3 = _mm_mul_epu32(T3, T15);
T1 = _mm_add_epi64(T1, v11);
v03 = H1;
v03 = _mm_mul_epu32(v03, T15);
v12 = H2;
v12 = _mm_mul_epu32(v12, T15);
T0 = _mm_add_epi64(T0, v02);
T14 = R40;
v21 = H3;
v21 = _mm_mul_epu32(v21, T15);
v31 = H3;
v31 = _mm_mul_epu32(v31, T14);
T0 = _mm_add_epi64(T0, v03);
T4 = H4;
T4 = _mm_mul_epu32(T4, T14);
T1 = _mm_add_epi64(T1, v12);
v04 = H0;
v04 = _mm_mul_epu32(v04, T14);
T2 = _mm_add_epi64(T2, v21);
v13 = H1;
v13 = _mm_mul_epu32(v13, T14);
T3 = _mm_add_epi64(T3, v31);
T15 = R41;
v22 = H2;
v22 = _mm_mul_epu32(v22, T14);
v32 = H2;
v32 = _mm_mul_epu32(v32, T15);
T0 = _mm_add_epi64(T0, v04);
v41 = H3;
v41 = _mm_mul_epu32(v41, T15);
T1 = _mm_add_epi64(T1, v13);
v14 = H0;
v14 = _mm_mul_epu32(v14, T15);
T2 = _mm_add_epi64(T2, v22);
T14 = R42;
T5 = _mm_unpacklo_epi64(
_mm_loadl_epi64((const xmmi *) (const void *) (m + 0)),
_mm_loadl_epi64((const xmmi *) (const void *) (m + 16)));
v23 = H1;
v23 = _mm_mul_epu32(v23, T15);
T3 = _mm_add_epi64(T3, v32);
v33 = H1;
v33 = _mm_mul_epu32(v33, T14);
T4 = _mm_add_epi64(T4, v41);
v42 = H2;
v42 = _mm_mul_epu32(v42, T14);
T1 = _mm_add_epi64(T1, v14);
T15 = R43;
T6 = _mm_unpacklo_epi64(
_mm_loadl_epi64((const xmmi *) (const void *) (m + 8)),
_mm_loadl_epi64((const xmmi *) (const void *) (m + 24)));
v24 = H0;
v24 = _mm_mul_epu32(v24, T14);
T2 = _mm_add_epi64(T2, v23);
v34 = H0;
v34 = _mm_mul_epu32(v34, T15);
T3 = _mm_add_epi64(T3, v33);
M0 = _mm_and_si128(MMASK, T5);
v43 = H1;
v43 = _mm_mul_epu32(v43, T15);
T4 = _mm_add_epi64(T4, v42);
M1 = _mm_and_si128(MMASK, _mm_srli_epi64(T5, 26));
v44 = H0;
v44 = _mm_mul_epu32(v44, R44);
T2 = _mm_add_epi64(T2, v24);
T5 = _mm_or_si128(_mm_srli_epi64(T5, 52), _mm_slli_epi64(T6, 12));
T3 = _mm_add_epi64(T3, v34);
M3 = _mm_and_si128(MMASK, _mm_srli_epi64(T6, 14));
T4 = _mm_add_epi64(T4, v43);
M2 = _mm_and_si128(MMASK, T5);
T4 = _mm_add_epi64(T4, v44);
M4 = _mm_or_si128(_mm_srli_epi64(T6, 40), HIBIT);
/* H += [Mx',My'] */
T5 = _mm_loadu_si128((const xmmi *) (const void *) (m + 32));
T6 = _mm_loadu_si128((const xmmi *) (const void *) (m + 48));
T7 = _mm_unpacklo_epi32(T5, T6);
T8 = _mm_unpackhi_epi32(T5, T6);
M5 = _mm_unpacklo_epi32(T7, _mm_setzero_si128());
M6 = _mm_unpackhi_epi32(T7, _mm_setzero_si128());
M7 = _mm_unpacklo_epi32(T8, _mm_setzero_si128());
M8 = _mm_unpackhi_epi32(T8, _mm_setzero_si128());
M6 = _mm_slli_epi64(M6, 6);
M7 = _mm_slli_epi64(M7, 12);
M8 = _mm_slli_epi64(M8, 18);
T0 = _mm_add_epi64(T0, M5);
T1 = _mm_add_epi64(T1, M6);
T2 = _mm_add_epi64(T2, M7);
T3 = _mm_add_epi64(T3, M8);
T4 = _mm_add_epi64(T4, HIBIT);
/* H += [Mx,My]*[r^2,r^2] */
T15 = S22;
v00 = M4;
v00 = _mm_mul_epu32(v00, S21);
v01 = M3;
v01 = _mm_mul_epu32(v01, T15);
T14 = S23;
v10 = M4;
v10 = _mm_mul_epu32(v10, T15);
v11 = M3;
v11 = _mm_mul_epu32(v11, T14);
T0 = _mm_add_epi64(T0, v00);
v20 = M4;
v20 = _mm_mul_epu32(v20, T14);
T0 = _mm_add_epi64(T0, v01);
T15 = S24;
v02 = M2;
v02 = _mm_mul_epu32(v02, T14);
T1 = _mm_add_epi64(T1, v10);
v30 = M4;
v30 = _mm_mul_epu32(v30, T15);
T1 = _mm_add_epi64(T1, v11);
v03 = M1;
v03 = _mm_mul_epu32(v03, T15);
T2 = _mm_add_epi64(T2, v20);
v12 = M2;
v12 = _mm_mul_epu32(v12, T15);
T0 = _mm_add_epi64(T0, v02);
T14 = R20;
v21 = M3;
v21 = _mm_mul_epu32(v21, T15);
T3 = _mm_add_epi64(T3, v30);
v31 = M3;
v31 = _mm_mul_epu32(v31, T14);
T0 = _mm_add_epi64(T0, v03);
v40 = M4;
v40 = _mm_mul_epu32(v40, T14);
T1 = _mm_add_epi64(T1, v12);
v04 = M0;
v04 = _mm_mul_epu32(v04, T14);
T2 = _mm_add_epi64(T2, v21);
v13 = M1;
v13 = _mm_mul_epu32(v13, T14);
T3 = _mm_add_epi64(T3, v31);
T15 = R21;
v22 = M2;
v22 = _mm_mul_epu32(v22, T14);
T4 = _mm_add_epi64(T4, v40);
v32 = M2;
v32 = _mm_mul_epu32(v32, T15);
T0 = _mm_add_epi64(T0, v04);
v41 = M3;
v41 = _mm_mul_epu32(v41, T15);
T1 = _mm_add_epi64(T1, v13);
v14 = M0;
v14 = _mm_mul_epu32(v14, T15);
T2 = _mm_add_epi64(T2, v22);
T14 = R22;
v23 = M1;
v23 = _mm_mul_epu32(v23, T15);
T3 = _mm_add_epi64(T3, v32);
v33 = M1;
v33 = _mm_mul_epu32(v33, T14);
T4 = _mm_add_epi64(T4, v41);
v42 = M2;
v42 = _mm_mul_epu32(v42, T14);
T1 = _mm_add_epi64(T1, v14);
T15 = R23;
v24 = M0;
v24 = _mm_mul_epu32(v24, T14);
T2 = _mm_add_epi64(T2, v23);
v34 = M0;
v34 = _mm_mul_epu32(v34, T15);
T3 = _mm_add_epi64(T3, v33);
v43 = M1;
v43 = _mm_mul_epu32(v43, T15);
T4 = _mm_add_epi64(T4, v42);
v44 = M0;
v44 = _mm_mul_epu32(v44, R24);
T2 = _mm_add_epi64(T2, v24);
T3 = _mm_add_epi64(T3, v34);
T4 = _mm_add_epi64(T4, v43);
T4 = _mm_add_epi64(T4, v44);
/* 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);
/* Final: 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;
}
}
if (bytes >= 32) {
xmmi v01, v02, v03, v04;
xmmi v11, v12, v13, v14;
xmmi v21, v22, v23, v24;
xmmi v31, v32, v33, v34;
xmmi v41, v42, v43, v44;
xmmi T14, T15;
/* H *= [r^2,r^2] */
T15 = S22;
T0 = H4;
T0 = _mm_mul_epu32(T0, S21);
v01 = H3;
v01 = _mm_mul_epu32(v01, T15);
T14 = S23;
T1 = H4;
T1 = _mm_mul_epu32(T1, T15);
v11 = H3;
v11 = _mm_mul_epu32(v11, T14);
T2 = H4;
T2 = _mm_mul_epu32(T2, T14);
T0 = _mm_add_epi64(T0, v01);
T15 = S24;
v02 = H2;
v02 = _mm_mul_epu32(v02, T14);
T3 = H4;
T3 = _mm_mul_epu32(T3, T15);
T1 = _mm_add_epi64(T1, v11);
v03 = H1;
v03 = _mm_mul_epu32(v03, T15);
v12 = H2;
v12 = _mm_mul_epu32(v12, T15);
T0 = _mm_add_epi64(T0, v02);
T14 = R20;
v21 = H3;
v21 = _mm_mul_epu32(v21, T15);
v31 = H3;
v31 = _mm_mul_epu32(v31, T14);
T0 = _mm_add_epi64(T0, v03);
T4 = H4;
T4 = _mm_mul_epu32(T4, T14);
T1 = _mm_add_epi64(T1, v12);
v04 = H0;
v04 = _mm_mul_epu32(v04, T14);
T2 = _mm_add_epi64(T2, v21);
v13 = H1;
v13 = _mm_mul_epu32(v13, T14);
T3 = _mm_add_epi64(T3, v31);
T15 = R21;
v22 = H2;
v22 = _mm_mul_epu32(v22, T14);
v32 = H2;
v32 = _mm_mul_epu32(v32, T15);
T0 = _mm_add_epi64(T0, v04);
v41 = H3;
v41 = _mm_mul_epu32(v41, T15);
T1 = _mm_add_epi64(T1, v13);
v14 = H0;
v14 = _mm_mul_epu32(v14, T15);
T2 = _mm_add_epi64(T2, v22);
T14 = R22;
v23 = H1;
v23 = _mm_mul_epu32(v23, T15);
T3 = _mm_add_epi64(T3, v32);
v33 = H1;
v33 = _mm_mul_epu32(v33, T14);
T4 = _mm_add_epi64(T4, v41);
v42 = H2;
v42 = _mm_mul_epu32(v42, T14);
T1 = _mm_add_epi64(T1, v14);
T15 = R23;
v24 = H0;
v24 = _mm_mul_epu32(v24, T14);
T2 = _mm_add_epi64(T2, v23);
v34 = H0;
v34 = _mm_mul_epu32(v34, T15);
T3 = _mm_add_epi64(T3, v33);
v43 = H1;
v43 = _mm_mul_epu32(v43, T15);
T4 = _mm_add_epi64(T4, v42);
v44 = H0;
v44 = _mm_mul_epu32(v44, R24);
T2 = _mm_add_epi64(T2, v24);
T3 = _mm_add_epi64(T3, v34);
T4 = _mm_add_epi64(T4, v43);
T4 = _mm_add_epi64(T4, v44);
/* H += [Mx,My] */
if (m) {
T5 = _mm_loadu_si128((const xmmi *) (const void *) (m + 0));
T6 = _mm_loadu_si128((const xmmi *) (const void *) (m + 16));
T7 = _mm_unpacklo_epi32(T5, T6);
T8 = _mm_unpackhi_epi32(T5, T6);
M0 = _mm_unpacklo_epi32(T7, _mm_setzero_si128());
M1 = _mm_unpackhi_epi32(T7, _mm_setzero_si128());
M2 = _mm_unpacklo_epi32(T8, _mm_setzero_si128());
M3 = _mm_unpackhi_epi32(T8, _mm_setzero_si128());
M1 = _mm_slli_epi64(M1, 6);
M2 = _mm_slli_epi64(M2, 12);
M3 = _mm_slli_epi64(M3, 18);
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, HIBIT);
}
/* 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;
}
if (m) {
T0 = _mm_shuffle_epi32(H0, _MM_SHUFFLE(0, 0, 2, 0));
T1 = _mm_shuffle_epi32(H1, _MM_SHUFFLE(0, 0, 2, 0));
T2 = _mm_shuffle_epi32(H2, _MM_SHUFFLE(0, 0, 2, 0));
T3 = _mm_shuffle_epi32(H3, _MM_SHUFFLE(0, 0, 2, 0));
T4 = _mm_shuffle_epi32(H4, _MM_SHUFFLE(0, 0, 2, 0));
T0 = _mm_unpacklo_epi64(T0, T1);
T1 = _mm_unpacklo_epi64(T2, T3);
_mm_storeu_si128((xmmi *) (void *) &st->H.hh[0], T0);
_mm_storeu_si128((xmmi *) (void *) &st->H.hh[4], T1);
_mm_storel_epi64((xmmi *) (void *) &st->H.hh[8], T4);
} else {
uint32_t t0, t1, t2, t3, t4, b;
uint64_t h0, h1, h2, g0, g1, g2, c, nc;
/* H = H[0]+H[1] */
T0 = H0;
T1 = H1;
T2 = H2;
T3 = H3;
T4 = H4;
T0 = _mm_add_epi64(T0, _mm_srli_si128(T0, 8));
T1 = _mm_add_epi64(T1, _mm_srli_si128(T1, 8));
T2 = _mm_add_epi64(T2, _mm_srli_si128(T2, 8));
T3 = _mm_add_epi64(T3, _mm_srli_si128(T3, 8));
T4 = _mm_add_epi64(T4, _mm_srli_si128(T4, 8));
t0 = _mm_cvtsi128_si32(T0);
b = (t0 >> 26);
t0 &= 0x3ffffff;
t1 = _mm_cvtsi128_si32(T1) + b;
b = (t1 >> 26);
t1 &= 0x3ffffff;
t2 = _mm_cvtsi128_si32(T2) + b;
b = (t2 >> 26);
t2 &= 0x3ffffff;
t3 = _mm_cvtsi128_si32(T3) + b;
b = (t3 >> 26);
t3 &= 0x3ffffff;
t4 = _mm_cvtsi128_si32(T4) + b;
/* everything except t4 is in range, so this is all safe */
h0 = (((uint64_t) t0) | ((uint64_t) t1 << 26)) & 0xfffffffffffull;
h1 = (((uint64_t) t1 >> 18) | ((uint64_t) t2 << 8) |
((uint64_t) t3 << 34)) &
0xfffffffffffull;
h2 = (((uint64_t) t3 >> 10) | ((uint64_t) t4 << 16));
c = (h2 >> 42);
h2 &= 0x3ffffffffff;
h0 += c * 5;
c = (h0 >> 44);
h0 &= 0xfffffffffff;
h1 += c;
c = (h1 >> 44);
h1 &= 0xfffffffffff;
h2 += c;
c = (h2 >> 42);
h2 &= 0x3ffffffffff;
h0 += c * 5;
c = (h0 >> 44);
h0 &= 0xfffffffffff;
h1 += c;
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);
st->H.h[0] = h0;
st->H.h[1] = h1;
st->H.h[2] = h2;
}
}
static void
poly1305_update(poly1305_state_internal_t *st, const unsigned char *m,
unsigned long long bytes)
{
unsigned long long i;
/* handle leftover */
if (st->leftover) {
unsigned long long want = (poly1305_block_size - st->leftover);
if (want > bytes) {
want = bytes;
}
for (i = 0; i < want; i++) {
st->buffer[st->leftover + i] = m[i];
}
bytes -= want;
m += want;
st->leftover += want;
if (st->leftover < poly1305_block_size) {
return;
}
poly1305_blocks(st, st->buffer, poly1305_block_size);
st->leftover = 0;
}
/* process full blocks */
if (bytes >= poly1305_block_size) {
unsigned long long want = (bytes & ~(poly1305_block_size - 1));
poly1305_blocks(st, m, want);
m += want;
bytes -= want;
}
/* store leftover */
if (bytes) {
for (i = 0; i < bytes; i++) {
st->buffer[st->leftover + i] = m[i];
}
st->leftover += bytes;
}
}
static POLY1305_NOINLINE void
poly1305_finish_ext(poly1305_state_internal_t *st, const unsigned char *m,
unsigned long long leftover, unsigned char mac[16])
{
uint64_t h0, h1, h2;
if (leftover) {
CRYPTO_ALIGN(16) unsigned char final[32] = { 0 };
poly1305_block_copy31(final, m, leftover);
if (leftover != 16) {
final[leftover] = 1;
}
st->flags |=
(leftover >= 16) ? poly1305_final_shift8 : poly1305_final_shift16;
poly1305_blocks(st, final, 32);
}
if (st->flags & poly1305_started) {
/* finalize, H *= [r^2,r], or H *= [r,1] */
if (!leftover || (leftover > 16)) {
st->flags |= poly1305_final_r2_r;
} else {
st->flags |= poly1305_final_r_1;
}
poly1305_blocks(st, NULL, 32);
}
h0 = st->H.h[0];
h1 = st->H.h[1];
h2 = st->H.h[2];
/* pad */
h0 = ((h0) | (h1 << 44));
h1 = ((h1 >> 20) | (h2 << 24));
#ifdef HAVE_AMD64_ASM
__asm__ __volatile__(
"addq %2, %0 ;\n"
"adcq %3, %1 ;\n"
: "+r"(h0), "+r"(h1)
: "r"(st->pad[0]), "r"(st->pad[1])
: "flags", "cc");
#else
{
uint128_t h;
memcpy(&h, &st->pad[0], 16);
h += ((uint128_t) h1 << 64) | h0;
h0 = (uint64_t) h;
h1 = (uint64_t)(h >> 64);
}
#endif
_mm_storeu_si128((xmmi *) (void *) st + 0, _mm_setzero_si128());
_mm_storeu_si128((xmmi *) (void *) st + 1, _mm_setzero_si128());
_mm_storeu_si128((xmmi *) (void *) st + 2, _mm_setzero_si128());
_mm_storeu_si128((xmmi *) (void *) st + 3, _mm_setzero_si128());
_mm_storeu_si128((xmmi *) (void *) st + 4, _mm_setzero_si128());
_mm_storeu_si128((xmmi *) (void *) st + 5, _mm_setzero_si128());
_mm_storeu_si128((xmmi *) (void *) st + 6, _mm_setzero_si128());
_mm_storeu_si128((xmmi *) (void *) st + 7, _mm_setzero_si128());
memcpy(&mac[0], &h0, 8);
memcpy(&mac[8], &h1, 8);
sodium_memzero((void *) st, sizeof *st);
}
static void
poly1305_finish(poly1305_state_internal_t *st, unsigned char mac[16])
{
poly1305_finish_ext(st, st->buffer, st->leftover, mac);
}
static int
crypto_onetimeauth_poly1305_sse2_init(crypto_onetimeauth_poly1305_state *state,
const unsigned char *key)
{
COMPILER_ASSERT(sizeof(crypto_onetimeauth_poly1305_state) >=
sizeof(poly1305_state_internal_t));
poly1305_init_ext((poly1305_state_internal_t *) (void *) state, key, 0U);
return 0;
}
static int
crypto_onetimeauth_poly1305_sse2_update(
crypto_onetimeauth_poly1305_state *state, const unsigned char *in,
unsigned long long inlen)
{
poly1305_update((poly1305_state_internal_t *) (void *) state, in, inlen);
return 0;
}
static int
crypto_onetimeauth_poly1305_sse2_final(crypto_onetimeauth_poly1305_state *state,
unsigned char *out)
{
poly1305_finish((poly1305_state_internal_t *) (void *) state, out);
return 0;
}
static int
crypto_onetimeauth_poly1305_sse2(unsigned char *out, const unsigned char *m,
unsigned long long inlen,
const unsigned char *key)
{
CRYPTO_ALIGN(64) poly1305_state_internal_t st;
unsigned long long blocks;
poly1305_init_ext(&st, key, inlen);
blocks = inlen & ~31;
if (blocks > 0) {
poly1305_blocks(&st, m, blocks);
m += blocks;
inlen -= blocks;
}
poly1305_finish_ext(&st, m, inlen, out);
return 0;
}
static int
crypto_onetimeauth_poly1305_sse2_verify(const unsigned char *h,
const unsigned char *in,
unsigned long long inlen,
const unsigned char *k)
{
unsigned char correct[16];
crypto_onetimeauth_poly1305_sse2(correct, in, inlen, k);
return crypto_verify_16(h, correct);
}
struct crypto_onetimeauth_poly1305_implementation
crypto_onetimeauth_poly1305_sse2_implementation = {
SODIUM_C99(.onetimeauth =) crypto_onetimeauth_poly1305_sse2,
SODIUM_C99(.onetimeauth_verify =)
crypto_onetimeauth_poly1305_sse2_verify,
SODIUM_C99(.onetimeauth_init =) crypto_onetimeauth_poly1305_sse2_init,
SODIUM_C99(.onetimeauth_update =)
crypto_onetimeauth_poly1305_sse2_update,
SODIUM_C99(.onetimeauth_final =) crypto_onetimeauth_poly1305_sse2_final
};
#endif
|
