Hacl_Poly1305_32.c

/* MIT License
 *
 * Copyright (c) 2016-2020 INRIA, CMU and Microsoft Corporation
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#include "Hacl_Poly1305_32.h"

typedef int8_t   i8;
typedef uint8_t  u8;
typedef int16_t  i16;
typedef uint32_t u32;
typedef int32_t  i32;
typedef int64_t  i64;
typedef uint64_t u64;
static u32 load32_le_p(u8 *s)
{
    return (u32)s[0]
        | ((u32)s[1] <<  8)
        | ((u32)s[2] << 16)
        | ((u32)s[3] << 24);
}

static u64 load64_le_p(u8 *s)
{
    return load32_le_p(s) | ((u64)load32_le_p(s+4) << 32);
}
static void store32_le_p(u8 out[4], u32 in)
{
    out[0] =  in        & 0xff;
    out[1] = (in >>  8) & 0xff;
    out[2] = (in >> 16) & 0xff;
    out[3] = (in >> 24) & 0xff;
}

static void store64_le_p(u8 out[8], u64 in)
{
    store32_le_p(out    , (u32)in );
    store32_le_p(out + 4, in >> 32);
}



uint32_t Hacl_Poly1305_32_blocklen = (uint32_t)16U;

void Hacl_Poly1305_32_poly1305_init(uint64_t *ctx, uint8_t *key)
{
  uint64_t *acc = ctx;
  uint64_t *pre = ctx + (uint32_t)5U;
  uint8_t *kr = key;
  uint64_t u0;
  uint64_t lo;
  uint64_t u;
  uint64_t hi;
  uint64_t mask0;
  uint64_t mask1;
  uint64_t lo1;
  uint64_t hi1;
  uint64_t *r;
  uint64_t *r5;
  uint64_t *rn;
  uint64_t *rn_5;
  uint64_t r_vec0;
  uint64_t r_vec1;
  uint64_t f00;
  uint64_t f10;
  uint64_t f25;
  uint64_t f30;
  uint64_t f40;
  uint64_t f0;
  uint64_t f1;
  uint64_t f2;
  uint64_t f3;
  uint64_t f4;
  uint64_t f20;
  uint64_t f21;
  uint64_t f22;
  uint64_t f23;
  uint64_t f24;
  acc[0U] = (uint64_t)0U;
  acc[1U] = (uint64_t)0U;
  acc[2U] = (uint64_t)0U;
  acc[3U] = (uint64_t)0U;
  acc[4U] = (uint64_t)0U;
  u0 = load64_le_p(kr);
  lo = u0;
  u = load64_le_p(kr + (uint32_t)8U);
  hi = u;
  mask0 = (uint64_t)0x0ffffffc0fffffffU;
  mask1 = (uint64_t)0x0ffffffc0ffffffcU;
  lo1 = lo & mask0;
  hi1 = hi & mask1;
  r = pre;
  r5 = pre + (uint32_t)5U;
  rn = pre + (uint32_t)10U;
  rn_5 = pre + (uint32_t)15U;
  r_vec0 = lo1;
  r_vec1 = hi1;
  f00 = r_vec0 & (uint64_t)0x3ffffffU;
  f10 = r_vec0 >> (uint32_t)26U & (uint64_t)0x3ffffffU;
  f25 = r_vec0 >> (uint32_t)52U | (r_vec1 & (uint64_t)0x3fffU) << (uint32_t)12U;
  f30 = r_vec1 >> (uint32_t)14U & (uint64_t)0x3ffffffU;
  f40 = r_vec1 >> (uint32_t)40U;
  f0 = f00;
  f1 = f10;
  f2 = f25;
  f3 = f30;
  f4 = f40;
  r[0U] = f0;
  r[1U] = f1;
  r[2U] = f2;
  r[3U] = f3;
  r[4U] = f4;
  f20 = r[0U];
  f21 = r[1U];
  f22 = r[2U];
  f23 = r[3U];
  f24 = r[4U];
  r5[0U] = f20 * (uint64_t)5U;
  r5[1U] = f21 * (uint64_t)5U;
  r5[2U] = f22 * (uint64_t)5U;
  r5[3U] = f23 * (uint64_t)5U;
  r5[4U] = f24 * (uint64_t)5U;
  rn[0U] = r[0U];
  rn[1U] = r[1U];
  rn[2U] = r[2U];
  rn[3U] = r[3U];
  rn[4U] = r[4U];
  rn_5[0U] = r5[0U];
  rn_5[1U] = r5[1U];
  rn_5[2U] = r5[2U];
  rn_5[3U] = r5[3U];
  rn_5[4U] = r5[4U];
}

void Hacl_Poly1305_32_poly1305_update1(uint64_t *ctx, uint8_t *text)
{
  uint64_t *pre = ctx + (uint32_t)5U;
  uint64_t *acc = ctx;
  uint64_t e[5U] = { 0U };
  uint64_t u0 = load64_le_p(text);
  uint64_t lo = u0;
  uint64_t u = load64_le_p(text + (uint32_t)8U);
  uint64_t hi = u;
  uint64_t f0 = lo;
  uint64_t f1 = hi;
  uint64_t f010 = f0 & (uint64_t)0x3ffffffU;
  uint64_t f110 = f0 >> (uint32_t)26U & (uint64_t)0x3ffffffU;
  uint64_t f20 = f0 >> (uint32_t)52U | (f1 & (uint64_t)0x3fffU) << (uint32_t)12U;
  uint64_t f30 = f1 >> (uint32_t)14U & (uint64_t)0x3ffffffU;
  uint64_t f40 = f1 >> (uint32_t)40U;
  uint64_t f01 = f010;
  uint64_t f111 = f110;
  uint64_t f2 = f20;
  uint64_t f3 = f30;
  uint64_t f41 = f40;
  uint64_t b;
  uint64_t mask;
  uint64_t f4;
  uint64_t *r;
  uint64_t *r5;
  uint64_t r0;
  uint64_t r1;
  uint64_t r2;
  uint64_t r3;
  uint64_t r4;
  uint64_t r51;
  uint64_t r52;
  uint64_t r53;
  uint64_t r54;
  uint64_t f10;
  uint64_t f11;
  uint64_t f12;
  uint64_t f13;
  uint64_t f14;
  uint64_t a0;
  uint64_t a1;
  uint64_t a2;
  uint64_t a3;
  uint64_t a4;
  uint64_t a01;
  uint64_t a11;
  uint64_t a21;
  uint64_t a31;
  uint64_t a41;
  uint64_t a02;
  uint64_t a12;
  uint64_t a22;
  uint64_t a32;
  uint64_t a42;
  uint64_t a03;
  uint64_t a13;
  uint64_t a23;
  uint64_t a33;
  uint64_t a43;
  uint64_t a04;
  uint64_t a14;
  uint64_t a24;
  uint64_t a34;
  uint64_t a44;
  uint64_t a05;
  uint64_t a15;
  uint64_t a25;
  uint64_t a35;
  uint64_t a45;
  uint64_t a06;
  uint64_t a16;
  uint64_t a26;
  uint64_t a36;
  uint64_t a46;
  uint64_t t0;
  uint64_t t1;
  uint64_t t2;
  uint64_t t3;
  uint64_t t4;
  uint64_t mask26;
  uint64_t z0;
  uint64_t z1;
  uint64_t x0;
  uint64_t x3;
  uint64_t x1;
  uint64_t x4;
  uint64_t z01;
  uint64_t z11;
  uint64_t t;
  uint64_t z12;
  uint64_t x11;
  uint64_t x41;
  uint64_t x2;
  uint64_t x01;
  uint64_t z02;
  uint64_t z13;
  uint64_t x21;
  uint64_t x02;
  uint64_t x31;
  uint64_t x12;
  uint64_t z03;
  uint64_t x32;
  uint64_t x42;
  uint64_t o0;
  uint64_t o1;
  uint64_t o2;
  uint64_t o3;
  uint64_t o4;
  e[0U] = f01;
  e[1U] = f111;
  e[2U] = f2;
  e[3U] = f3;
  e[4U] = f41;
  b = (uint64_t)0x1000000U;
  mask = b;
  f4 = e[4U];
  e[4U] = f4 | mask;
  r = pre;
  r5 = pre + (uint32_t)5U;
  r0 = r[0U];
  r1 = r[1U];
  r2 = r[2U];
  r3 = r[3U];
  r4 = r[4U];
  r51 = r5[1U];
  r52 = r5[2U];
  r53 = r5[3U];
  r54 = r5[4U];
  f10 = e[0U];
  f11 = e[1U];
  f12 = e[2U];
  f13 = e[3U];
  f14 = e[4U];
  a0 = acc[0U];
  a1 = acc[1U];
  a2 = acc[2U];
  a3 = acc[3U];
  a4 = acc[4U];
  a01 = a0 + f10;
  a11 = a1 + f11;
  a21 = a2 + f12;
  a31 = a3 + f13;
  a41 = a4 + f14;
  a02 = r0 * a01;
  a12 = r1 * a01;
  a22 = r2 * a01;
  a32 = r3 * a01;
  a42 = r4 * a01;
  a03 = a02 + r54 * a11;
  a13 = a12 + r0 * a11;
  a23 = a22 + r1 * a11;
  a33 = a32 + r2 * a11;
  a43 = a42 + r3 * a11;
  a04 = a03 + r53 * a21;
  a14 = a13 + r54 * a21;
  a24 = a23 + r0 * a21;
  a34 = a33 + r1 * a21;
  a44 = a43 + r2 * a21;
  a05 = a04 + r52 * a31;
  a15 = a14 + r53 * a31;
  a25 = a24 + r54 * a31;
  a35 = a34 + r0 * a31;
  a45 = a44 + r1 * a31;
  a06 = a05 + r51 * a41;
  a16 = a15 + r52 * a41;
  a26 = a25 + r53 * a41;
  a36 = a35 + r54 * a41;
  a46 = a45 + r0 * a41;
  t0 = a06;
  t1 = a16;
  t2 = a26;
  t3 = a36;
  t4 = a46;
  mask26 = (uint64_t)0x3ffffffU;
  z0 = t0 >> (uint32_t)26U;
  z1 = t3 >> (uint32_t)26U;
  x0 = t0 & mask26;
  x3 = t3 & mask26;
  x1 = t1 + z0;
  x4 = t4 + z1;
  z01 = x1 >> (uint32_t)26U;
  z11 = x4 >> (uint32_t)26U;
  t = z11 << (uint32_t)2U;
  z12 = z11 + t;
  x11 = x1 & mask26;
  x41 = x4 & mask26;
  x2 = t2 + z01;
  x01 = x0 + z12;
  z02 = x2 >> (uint32_t)26U;
  z13 = x01 >> (uint32_t)26U;
  x21 = x2 & mask26;
  x02 = x01 & mask26;
  x31 = x3 + z02;
  x12 = x11 + z13;
  z03 = x31 >> (uint32_t)26U;
  x32 = x31 & mask26;
  x42 = x41 + z03;
  o0 = x02;
  o1 = x12;
  o2 = x21;
  o3 = x32;
  o4 = x42;
  acc[0U] = o0;
  acc[1U] = o1;
  acc[2U] = o2;
  acc[3U] = o3;
  acc[4U] = o4;
}

void Hacl_Poly1305_32_poly1305_update(uint64_t *ctx, uint32_t len, uint8_t *text)
{
  uint64_t *pre = ctx + (uint32_t)5U;
  uint64_t *acc = ctx;
  uint32_t nb = len / (uint32_t)16U;
  uint32_t rem = len % (uint32_t)16U;
  {
    uint32_t i;
    for (i = (uint32_t)0U; i < nb; i++)
    {
      uint8_t *block = text + i * (uint32_t)16U;
      uint64_t e[5U] = { 0U };
      uint64_t u0 = load64_le_p(block);
      uint64_t lo = u0;
      uint64_t u = load64_le_p(block + (uint32_t)8U);
      uint64_t hi = u;
      uint64_t f0 = lo;
      uint64_t f1 = hi;
      uint64_t f010 = f0 & (uint64_t)0x3ffffffU;
      uint64_t f110 = f0 >> (uint32_t)26U & (uint64_t)0x3ffffffU;
      uint64_t f20 = f0 >> (uint32_t)52U | (f1 & (uint64_t)0x3fffU) << (uint32_t)12U;
      uint64_t f30 = f1 >> (uint32_t)14U & (uint64_t)0x3ffffffU;
      uint64_t f40 = f1 >> (uint32_t)40U;
      uint64_t f01 = f010;
      uint64_t f111 = f110;
      uint64_t f2 = f20;
      uint64_t f3 = f30;
      uint64_t f41 = f40;
      e[0U] = f01;
      e[1U] = f111;
      e[2U] = f2;
      e[3U] = f3;
      e[4U] = f41;
      {
        uint64_t b = (uint64_t)0x1000000U;
        uint64_t mask = b;
        uint64_t f4 = e[4U];
        e[4U] = f4 | mask;
        {
          uint64_t *r = pre;
          uint64_t *r5 = pre + (uint32_t)5U;
          uint64_t r0 = r[0U];
          uint64_t r1 = r[1U];
          uint64_t r2 = r[2U];
          uint64_t r3 = r[3U];
          uint64_t r4 = r[4U];
          uint64_t r51 = r5[1U];
          uint64_t r52 = r5[2U];
          uint64_t r53 = r5[3U];
          uint64_t r54 = r5[4U];
          uint64_t f10 = e[0U];
          uint64_t f11 = e[1U];
          uint64_t f12 = e[2U];
          uint64_t f13 = e[3U];
          uint64_t f14 = e[4U];
          uint64_t a0 = acc[0U];
          uint64_t a1 = acc[1U];
          uint64_t a2 = acc[2U];
          uint64_t a3 = acc[3U];
          uint64_t a4 = acc[4U];
          uint64_t a01 = a0 + f10;
          uint64_t a11 = a1 + f11;
          uint64_t a21 = a2 + f12;
          uint64_t a31 = a3 + f13;
          uint64_t a41 = a4 + f14;
          uint64_t a02 = r0 * a01;
          uint64_t a12 = r1 * a01;
          uint64_t a22 = r2 * a01;
          uint64_t a32 = r3 * a01;
          uint64_t a42 = r4 * a01;
          uint64_t a03 = a02 + r54 * a11;
          uint64_t a13 = a12 + r0 * a11;
          uint64_t a23 = a22 + r1 * a11;
          uint64_t a33 = a32 + r2 * a11;
          uint64_t a43 = a42 + r3 * a11;
          uint64_t a04 = a03 + r53 * a21;
          uint64_t a14 = a13 + r54 * a21;
          uint64_t a24 = a23 + r0 * a21;
          uint64_t a34 = a33 + r1 * a21;
          uint64_t a44 = a43 + r2 * a21;
          uint64_t a05 = a04 + r52 * a31;
          uint64_t a15 = a14 + r53 * a31;
          uint64_t a25 = a24 + r54 * a31;
          uint64_t a35 = a34 + r0 * a31;
          uint64_t a45 = a44 + r1 * a31;
          uint64_t a06 = a05 + r51 * a41;
          uint64_t a16 = a15 + r52 * a41;
          uint64_t a26 = a25 + r53 * a41;
          uint64_t a36 = a35 + r54 * a41;
          uint64_t a46 = a45 + r0 * a41;
          uint64_t t0 = a06;
          uint64_t t1 = a16;
          uint64_t t2 = a26;
          uint64_t t3 = a36;
          uint64_t t4 = a46;
          uint64_t mask26 = (uint64_t)0x3ffffffU;
          uint64_t z0 = t0 >> (uint32_t)26U;
          uint64_t z1 = t3 >> (uint32_t)26U;
          uint64_t x0 = t0 & mask26;
          uint64_t x3 = t3 & mask26;
          uint64_t x1 = t1 + z0;
          uint64_t x4 = t4 + z1;
          uint64_t z01 = x1 >> (uint32_t)26U;
          uint64_t z11 = x4 >> (uint32_t)26U;
          uint64_t t = z11 << (uint32_t)2U;
          uint64_t z12 = z11 + t;
          uint64_t x11 = x1 & mask26;
          uint64_t x41 = x4 & mask26;
          uint64_t x2 = t2 + z01;
          uint64_t x01 = x0 + z12;
          uint64_t z02 = x2 >> (uint32_t)26U;
          uint64_t z13 = x01 >> (uint32_t)26U;
          uint64_t x21 = x2 & mask26;
          uint64_t x02 = x01 & mask26;
          uint64_t x31 = x3 + z02;
          uint64_t x12 = x11 + z13;
          uint64_t z03 = x31 >> (uint32_t)26U;
          uint64_t x32 = x31 & mask26;
          uint64_t x42 = x41 + z03;
          uint64_t o0 = x02;
          uint64_t o1 = x12;
          uint64_t o2 = x21;
          uint64_t o3 = x32;
          uint64_t o4 = x42;
          acc[0U] = o0;
          acc[1U] = o1;
          acc[2U] = o2;
          acc[3U] = o3;
          acc[4U] = o4;
        }
      }
    }
  }
  if (rem > (uint32_t)0U)
  {
    uint8_t *last = text + nb * (uint32_t)16U;
    uint64_t e[5U] = { 0U };
    uint8_t tmp[16U] = { 0U };
    uint64_t u0;
    uint64_t lo;
    uint64_t u;
    uint64_t hi;
    uint64_t f0;
    uint64_t f1;
    uint64_t f010;
    uint64_t f110;
    uint64_t f20;
    uint64_t f30;
    uint64_t f40;
    uint64_t f01;
    uint64_t f111;
    uint64_t f2;
    uint64_t f3;
    uint64_t f4;
    uint64_t b;
    uint64_t mask;
    uint64_t fi;
    uint64_t *r;
    uint64_t *r5;
    uint64_t r0;
    uint64_t r1;
    uint64_t r2;
    uint64_t r3;
    uint64_t r4;
    uint64_t r51;
    uint64_t r52;
    uint64_t r53;
    uint64_t r54;
    uint64_t f10;
    uint64_t f11;
    uint64_t f12;
    uint64_t f13;
    uint64_t f14;
    uint64_t a0;
    uint64_t a1;
    uint64_t a2;
    uint64_t a3;
    uint64_t a4;
    uint64_t a01;
    uint64_t a11;
    uint64_t a21;
    uint64_t a31;
    uint64_t a41;
    uint64_t a02;
    uint64_t a12;
    uint64_t a22;
    uint64_t a32;
    uint64_t a42;
    uint64_t a03;
    uint64_t a13;
    uint64_t a23;
    uint64_t a33;
    uint64_t a43;
    uint64_t a04;
    uint64_t a14;
    uint64_t a24;
    uint64_t a34;
    uint64_t a44;
    uint64_t a05;
    uint64_t a15;
    uint64_t a25;
    uint64_t a35;
    uint64_t a45;
    uint64_t a06;
    uint64_t a16;
    uint64_t a26;
    uint64_t a36;
    uint64_t a46;
    uint64_t t0;
    uint64_t t1;
    uint64_t t2;
    uint64_t t3;
    uint64_t t4;
    uint64_t mask26;
    uint64_t z0;
    uint64_t z1;
    uint64_t x0;
    uint64_t x3;
    uint64_t x1;
    uint64_t x4;
    uint64_t z01;
    uint64_t z11;
    uint64_t t;
    uint64_t z12;
    uint64_t x11;
    uint64_t x41;
    uint64_t x2;
    uint64_t x01;
    uint64_t z02;
    uint64_t z13;
    uint64_t x21;
    uint64_t x02;
    uint64_t x31;
    uint64_t x12;
    uint64_t z03;
    uint64_t x32;
    uint64_t x42;
    uint64_t o0;
    uint64_t o1;
    uint64_t o2;
    uint64_t o3;
    uint64_t o4;
    memcpy(tmp, last, rem * sizeof (uint8_t));
    u0 = load64_le_p(tmp);
    lo = u0;
    u = load64_le_p(tmp + (uint32_t)8U);
    hi = u;
    f0 = lo;
    f1 = hi;
    f010 = f0 & (uint64_t)0x3ffffffU;
    f110 = f0 >> (uint32_t)26U & (uint64_t)0x3ffffffU;
    f20 = f0 >> (uint32_t)52U | (f1 & (uint64_t)0x3fffU) << (uint32_t)12U;
    f30 = f1 >> (uint32_t)14U & (uint64_t)0x3ffffffU;
    f40 = f1 >> (uint32_t)40U;
    f01 = f010;
    f111 = f110;
    f2 = f20;
    f3 = f30;
    f4 = f40;
    e[0U] = f01;
    e[1U] = f111;
    e[2U] = f2;
    e[3U] = f3;
    e[4U] = f4;
    b = (uint64_t)1U << rem * (uint32_t)8U % (uint32_t)26U;
    mask = b;
    fi = e[rem * (uint32_t)8U / (uint32_t)26U];
    e[rem * (uint32_t)8U / (uint32_t)26U] = fi | mask;
    r = pre;
    r5 = pre + (uint32_t)5U;
    r0 = r[0U];
    r1 = r[1U];
    r2 = r[2U];
    r3 = r[3U];
    r4 = r[4U];
    r51 = r5[1U];
    r52 = r5[2U];
    r53 = r5[3U];
    r54 = r5[4U];
    f10 = e[0U];
    f11 = e[1U];
    f12 = e[2U];
    f13 = e[3U];
    f14 = e[4U];
    a0 = acc[0U];
    a1 = acc[1U];
    a2 = acc[2U];
    a3 = acc[3U];
    a4 = acc[4U];
    a01 = a0 + f10;
    a11 = a1 + f11;
    a21 = a2 + f12;
    a31 = a3 + f13;
    a41 = a4 + f14;
    a02 = r0 * a01;
    a12 = r1 * a01;
    a22 = r2 * a01;
    a32 = r3 * a01;
    a42 = r4 * a01;
    a03 = a02 + r54 * a11;
    a13 = a12 + r0 * a11;
    a23 = a22 + r1 * a11;
    a33 = a32 + r2 * a11;
    a43 = a42 + r3 * a11;
    a04 = a03 + r53 * a21;
    a14 = a13 + r54 * a21;
    a24 = a23 + r0 * a21;
    a34 = a33 + r1 * a21;
    a44 = a43 + r2 * a21;
    a05 = a04 + r52 * a31;
    a15 = a14 + r53 * a31;
    a25 = a24 + r54 * a31;
    a35 = a34 + r0 * a31;
    a45 = a44 + r1 * a31;
    a06 = a05 + r51 * a41;
    a16 = a15 + r52 * a41;
    a26 = a25 + r53 * a41;
    a36 = a35 + r54 * a41;
    a46 = a45 + r0 * a41;
    t0 = a06;
    t1 = a16;
    t2 = a26;
    t3 = a36;
    t4 = a46;
    mask26 = (uint64_t)0x3ffffffU;
    z0 = t0 >> (uint32_t)26U;
    z1 = t3 >> (uint32_t)26U;
    x0 = t0 & mask26;
    x3 = t3 & mask26;
    x1 = t1 + z0;
    x4 = t4 + z1;
    z01 = x1 >> (uint32_t)26U;
    z11 = x4 >> (uint32_t)26U;
    t = z11 << (uint32_t)2U;
    z12 = z11 + t;
    x11 = x1 & mask26;
    x41 = x4 & mask26;
    x2 = t2 + z01;
    x01 = x0 + z12;
    z02 = x2 >> (uint32_t)26U;
    z13 = x01 >> (uint32_t)26U;
    x21 = x2 & mask26;
    x02 = x01 & mask26;
    x31 = x3 + z02;
    x12 = x11 + z13;
    z03 = x31 >> (uint32_t)26U;
    x32 = x31 & mask26;
    x42 = x41 + z03;
    o0 = x02;
    o1 = x12;
    o2 = x21;
    o3 = x32;
    o4 = x42;
    acc[0U] = o0;
    acc[1U] = o1;
    acc[2U] = o2;
    acc[3U] = o3;
    acc[4U] = o4;
    return;
  }
}

void Hacl_Poly1305_32_poly1305_finish(uint8_t *tag, uint8_t *key, uint64_t *ctx)
{
  uint64_t *acc = ctx;
  uint8_t *ks = key + (uint32_t)16U;
  uint64_t f00 = acc[0U];
  uint64_t f13 = acc[1U];
  uint64_t f23 = acc[2U];
  uint64_t f33 = acc[3U];
  uint64_t f40 = acc[4U];
  uint64_t l0 = f00 + (uint64_t)0U;
  uint64_t tmp00 = l0 & (uint64_t)0x3ffffffU;
  uint64_t c00 = l0 >> (uint32_t)26U;
  uint64_t l1 = f13 + c00;
  uint64_t tmp10 = l1 & (uint64_t)0x3ffffffU;
  uint64_t c10 = l1 >> (uint32_t)26U;
  uint64_t l2 = f23 + c10;
  uint64_t tmp20 = l2 & (uint64_t)0x3ffffffU;
  uint64_t c20 = l2 >> (uint32_t)26U;
  uint64_t l3 = f33 + c20;
  uint64_t tmp30 = l3 & (uint64_t)0x3ffffffU;
  uint64_t c30 = l3 >> (uint32_t)26U;
  uint64_t l4 = f40 + c30;
  uint64_t tmp40 = l4 & (uint64_t)0x3ffffffU;
  uint64_t c40 = l4 >> (uint32_t)26U;
  uint64_t f010 = tmp00 + c40 * (uint64_t)5U;
  uint64_t f110 = tmp10;
  uint64_t f210 = tmp20;
  uint64_t f310 = tmp30;
  uint64_t f410 = tmp40;
  uint64_t l = f010 + (uint64_t)0U;
  uint64_t tmp0 = l & (uint64_t)0x3ffffffU;
  uint64_t c0 = l >> (uint32_t)26U;
  uint64_t l5 = f110 + c0;
  uint64_t tmp1 = l5 & (uint64_t)0x3ffffffU;
  uint64_t c1 = l5 >> (uint32_t)26U;
  uint64_t l6 = f210 + c1;
  uint64_t tmp2 = l6 & (uint64_t)0x3ffffffU;
  uint64_t c2 = l6 >> (uint32_t)26U;
  uint64_t l7 = f310 + c2;
  uint64_t tmp3 = l7 & (uint64_t)0x3ffffffU;
  uint64_t c3 = l7 >> (uint32_t)26U;
  uint64_t l8 = f410 + c3;
  uint64_t tmp4 = l8 & (uint64_t)0x3ffffffU;
  uint64_t c4 = l8 >> (uint32_t)26U;
  uint64_t f02 = tmp0 + c4 * (uint64_t)5U;
  uint64_t f12 = tmp1;
  uint64_t f22 = tmp2;
  uint64_t f32 = tmp3;
  uint64_t f42 = tmp4;
  uint64_t mh = (uint64_t)0x3ffffffU;
  uint64_t ml = (uint64_t)0x3fffffbU;
  uint64_t mask = FStar_UInt64_eq_mask(f42, mh);
  uint64_t mask1 = mask & FStar_UInt64_eq_mask(f32, mh);
  uint64_t mask2 = mask1 & FStar_UInt64_eq_mask(f22, mh);
  uint64_t mask3 = mask2 & FStar_UInt64_eq_mask(f12, mh);
  uint64_t mask4 = mask3 & ~~FStar_UInt64_gte_mask(f02, ml);
  uint64_t ph = mask4 & mh;
  uint64_t pl = mask4 & ml;
  uint64_t o0 = f02 - pl;
  uint64_t o1 = f12 - ph;
  uint64_t o2 = f22 - ph;
  uint64_t o3 = f32 - ph;
  uint64_t o4 = f42 - ph;
  uint64_t f011 = o0;
  uint64_t f111 = o1;
  uint64_t f211 = o2;
  uint64_t f311 = o3;
  uint64_t f411 = o4;
  uint64_t f0;
  uint64_t f1;
  uint64_t f2;
  uint64_t f3;
  uint64_t f4;
  uint64_t f01;
  uint64_t f112;
  uint64_t f212;
  uint64_t f312;
  uint64_t f41;
  uint64_t lo0;
  uint64_t hi0;
  uint64_t f10;
  uint64_t f11;
  uint64_t u0;
  uint64_t lo;
  uint64_t u;
  uint64_t hi;
  uint64_t f20;
  uint64_t f21;
  uint64_t r0;
  uint64_t r1;
  uint64_t c;
  uint64_t r11;
  uint64_t f30;
  uint64_t f31;
  acc[0U] = f011;
  acc[1U] = f111;
  acc[2U] = f211;
  acc[3U] = f311;
  acc[4U] = f411;
  f0 = acc[0U];
  f1 = acc[1U];
  f2 = acc[2U];
  f3 = acc[3U];
  f4 = acc[4U];
  f01 = f0;
  f112 = f1;
  f212 = f2;
  f312 = f3;
  f41 = f4;
  lo0 = (f01 | f112 << (uint32_t)26U) | f212 << (uint32_t)52U;
  hi0 = (f212 >> (uint32_t)12U | f312 << (uint32_t)14U) | f41 << (uint32_t)40U;
  f10 = lo0;
  f11 = hi0;
  u0 = load64_le_p(ks);
  lo = u0;
  u = load64_le_p(ks + (uint32_t)8U);
  hi = u;
  f20 = lo;
  f21 = hi;
  r0 = f10 + f20;
  r1 = f11 + f21;
  c = (r0 ^ ((r0 ^ f20) | ((r0 - f20) ^ f20))) >> (uint32_t)63U;
  r11 = r1 + c;
  f30 = r0;
  f31 = r11;
  store64_le_p(tag, f30);
  store64_le_p(tag + (uint32_t)8U, f31);
}

void Hacl_Poly1305_32_poly1305_mac(uint8_t *tag, uint32_t len, uint8_t *text, uint8_t *key)
{
  uint64_t ctx[25U] = { 0U };
  Hacl_Poly1305_32_poly1305_init(ctx, key);
  Hacl_Poly1305_32_poly1305_update(ctx, len, text);
  Hacl_Poly1305_32_poly1305_finish(tag, key, ctx);
}