/* MIT License

 *

 * Copyright (c) 2016-2022 INRIA, CMU and Microsoft Corporation

 * Copyright (c) 2022-2023 HACL* Contributors

 *

 * 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_Chacha20Poly1305_32.h"

#include "internal/Hacl_Krmllib.h"

static inline void

poly1305_padded_32(uint64_t *ctx, uint32_t len, uint8_t *text)

{

    uint32_t n = len / (uint32_t)16U;

    uint32_t r = len % (uint32_t)16U;

    uint8_t *blocks = text;

    uint8_t *rem = text + n * (uint32_t)16U;

    uint64_t *pre0 = ctx + (uint32_t)5U;

    uint64_t *acc0 = ctx;

    uint32_t nb = n * (uint32_t)16U / (uint32_t)16U;

    uint32_t rem1 = n * (uint32_t)16U % (uint32_t)16U;

    for (uint32_t i = (uint32_t)0U; i < nb; i++) {

        uint8_t *block = blocks + i * (uint32_t)16U;

        uint64_t e[5U] = { 0U };

        uint64_t u0 = load64_le(block);

        uint64_t lo = u0;

        uint64_t u = load64_le(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 *r1 = pre0;

        uint64_t *r5 = pre0 + (uint32_t)5U;

        uint64_t r0 = r1[0U];

        uint64_t r11 = r1[1U];

        uint64_t r2 = r1[2U];

        uint64_t r3 = r1[3U];

        uint64_t r4 = r1[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 = acc0[0U];

        uint64_t a1 = acc0[1U];

        uint64_t a2 = acc0[2U];

        uint64_t a3 = acc0[3U];

        uint64_t a4 = acc0[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 = r11 * 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 + r11 * 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 + r11 * 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 + r11 * 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;

        acc0[0U] = o0;

        acc0[1U] = o1;

        acc0[2U] = o2;

        acc0[3U] = o3;

        acc0[4U] = o4;

    }

    if (rem1 > (uint32_t)0U) {

        uint8_t *last = blocks + nb * (uint32_t)16U;

        uint64_t e[5U] = { 0U };

        uint8_t tmp[16U] = { 0U };

        memcpy(tmp, last, rem1 * sizeof(uint8_t));

        uint64_t u0 = load64_le(tmp);

        uint64_t lo = u0;

        uint64_t u = load64_le(tmp + (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 f4 = f40;

        e[0U] = f01;

        e[1U] = f111;

        e[2U] = f2;

        e[3U] = f3;

        e[4U] = f4;

        uint64_t b = (uint64_t)1U << rem1 * (uint32_t)8U % (uint32_t)26U;

        uint64_t mask = b;

        uint64_t fi = e[rem1 * (uint32_t)8U / (uint32_t)26U];

        e[rem1 * (uint32_t)8U / (uint32_t)26U] = fi | mask;

        uint64_t *r1 = pre0;

        uint64_t *r5 = pre0 + (uint32_t)5U;

        uint64_t r0 = r1[0U];

        uint64_t r11 = r1[1U];

        uint64_t r2 = r1[2U];

        uint64_t r3 = r1[3U];

        uint64_t r4 = r1[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 = acc0[0U];

        uint64_t a1 = acc0[1U];

        uint64_t a2 = acc0[2U];

        uint64_t a3 = acc0[3U];

        uint64_t a4 = acc0[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 = r11 * 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 + r11 * 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 + r11 * 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 + r11 * 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;

        acc0[0U] = o0;

        acc0[1U] = o1;

        acc0[2U] = o2;

        acc0[3U] = o3;

        acc0[4U] = o4;

    }

    uint8_t tmp[16U] = { 0U };

    memcpy(tmp, rem, r * sizeof(uint8_t));

    if (r > (uint32_t)0U) {

        uint64_t *pre = ctx + (uint32_t)5U;

        uint64_t *acc = ctx;

        uint64_t e[5U] = { 0U };

        uint64_t u0 = load64_le(tmp);

        uint64_t lo = u0;

        uint64_t u = load64_le(tmp + (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 *r1 = pre;

        uint64_t *r5 = pre + (uint32_t)5U;

        uint64_t r0 = r1[0U];

        uint64_t r11 = r1[1U];

        uint64_t r2 = r1[2U];

        uint64_t r3 = r1[3U];

        uint64_t r4 = r1[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 = r11 * 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 + r11 * 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 + r11 * 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 + r11 * 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;

        return;

    }

}

static inline void

poly1305_do_32(

    uint8_t *k,

    uint32_t aadlen,

    uint8_t *aad,

    uint32_t mlen,

    uint8_t *m,

    uint8_t *out)

{

    uint64_t ctx[25U] = { 0U };

    uint8_t block[16U] = { 0U };

    Hacl_Poly1305_32_poly1305_init(ctx, k);

    if (aadlen != (uint32_t)0U) {

        poly1305_padded_32(ctx, aadlen, aad);

    }

    if (mlen != (uint32_t)0U) {

        poly1305_padded_32(ctx, mlen, m);

    }

    store64_le(block, (uint64_t)aadlen);

    store64_le(block + (uint32_t)8U, (uint64_t)mlen);

    uint64_t *pre = ctx + (uint32_t)5U;

    uint64_t *acc = ctx;

    uint64_t e[5U] = { 0U };

    uint64_t u0 = load64_le(block);

    uint64_t lo = u0;

    uint64_t u = load64_le(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;

    Hacl_Poly1305_32_poly1305_finish(out, k, ctx);

}

/**

Encrypt a message `m` with key `k`.

The arguments `k`, `n`, `aadlen`, and `aad` are same in encryption/decryption.

Note: Encryption and decryption can be executed in-place, i.e., `m` and `cipher` can point to the same memory.

@param k Pointer to 32 bytes of memory where the AEAD key is read from.

@param n Pointer to 12 bytes of memory where the AEAD nonce is read from.

@param aadlen Length of the associated data.

@param aad Pointer to `aadlen` bytes of memory where the associated data is read from.

@param mlen Length of the message.

@param m Pointer to `mlen` bytes of memory where the message is read from.

@param cipher Pointer to `mlen` bytes of memory where the ciphertext is written to.

@param mac Pointer to 16 bytes of memory where the mac is written to.

*/

void

Hacl_Chacha20Poly1305_32_aead_encrypt(

    uint8_t *k,

    uint8_t *n,

    uint32_t aadlen,

    uint8_t *aad,

    uint32_t mlen,

    uint8_t *m,

    uint8_t *cipher,

    uint8_t *mac)

{

    Hacl_Chacha20_chacha20_encrypt(mlen, cipher, m, k, n, (uint32_t)1U);

    uint8_t tmp[64U] = { 0U };

    Hacl_Chacha20_chacha20_encrypt((uint32_t)64U, tmp, tmp, k, n, (uint32_t)0U);

    uint8_t *key = tmp;

    poly1305_do_32(key, aadlen, aad, mlen, cipher, mac);

}

/**

Decrypt a ciphertext `cipher` with key `k`.

The arguments `k`, `n`, `aadlen`, and `aad` are same in encryption/decryption.

Note: Encryption and decryption can be executed in-place, i.e., `m` and `cipher` can point to the same memory.

If decryption succeeds, the resulting plaintext is stored in `m` and the function returns the success code 0.

If decryption fails, the array `m` remains unchanged and the function returns the error code 1.

@param k Pointer to 32 bytes of memory where the AEAD key is read from.

@param n Pointer to 12 bytes of memory where the AEAD nonce is read from.

@param aadlen Length of the associated data.

@param aad Pointer to `aadlen` bytes of memory where the associated data is read from.

@param mlen Length of the ciphertext.

@param m Pointer to `mlen` bytes of memory where the message is written to.

@param cipher Pointer to `mlen` bytes of memory where the ciphertext is read from.

@param mac Pointer to 16 bytes of memory where the mac is read from.

@returns 0 on succeess; 1 on failure.

*/

uint32_t

Hacl_Chacha20Poly1305_32_aead_decrypt(

    uint8_t *k,

    uint8_t *n,

    uint32_t aadlen,

    uint8_t *aad,

    uint32_t mlen,

    uint8_t *m,

    uint8_t *cipher,

    uint8_t *mac)

{

    uint8_t computed_mac[16U] = { 0U };

    uint8_t tmp[64U] = { 0U };

    Hacl_Chacha20_chacha20_encrypt((uint32_t)64U, tmp, tmp, k, n, (uint32_t)0U);

    uint8_t *key = tmp;

    poly1305_do_32(key, aadlen, aad, mlen, cipher, computed_mac);

    uint8_t res = (uint8_t)255U;

    KRML_MAYBE_FOR16(i,

                     (uint32_t)0U,

                     (uint32_t)16U,

                     (uint32_t)1U,

                     uint8_t uu____0 = FStar_UInt8_eq_mask(computed_mac[i], mac[i]);

                     res = uu____0 & res;);

    uint8_t z = res;

    if (z == (uint8_t)255U) {

        Hacl_Chacha20_chacha20_encrypt(mlen, m, cipher, k, n, (uint32_t)1U);

        return (uint32_t)0U;

    }

    return (uint32_t)1U;

}