/* 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 "internal/Hacl_Hash_SHA3.h"

static uint32_t
block_len(Spec_Hash_Definitions_hash_alg a)
{
    switch (a) {
        case Spec_Hash_Definitions_SHA3_224: {
            return (uint32_t)144U;
        }
        case Spec_Hash_Definitions_SHA3_256: {
            return (uint32_t)136U;
        }
        case Spec_Hash_Definitions_SHA3_384: {
            return (uint32_t)104U;
        }
        case Spec_Hash_Definitions_SHA3_512: {
            return (uint32_t)72U;
        }
        case Spec_Hash_Definitions_Shake128: {
            return (uint32_t)168U;
        }
        case Spec_Hash_Definitions_Shake256: {
            return (uint32_t)136U;
        }
        default: {
            KRML_HOST_EPRINTF("KaRaMeL incomplete match at %s:%d\n", __FILE__, __LINE__);
            KRML_HOST_EXIT(253U);
        }
    }
}

static uint32_t
hash_len(Spec_Hash_Definitions_hash_alg a)
{
    switch (a) {
        case Spec_Hash_Definitions_SHA3_224: {
            return (uint32_t)28U;
        }
        case Spec_Hash_Definitions_SHA3_256: {
            return (uint32_t)32U;
        }
        case Spec_Hash_Definitions_SHA3_384: {
            return (uint32_t)48U;
        }
        case Spec_Hash_Definitions_SHA3_512: {
            return (uint32_t)64U;
        }
        default: {
            KRML_HOST_EPRINTF("KaRaMeL incomplete match at %s:%d\n", __FILE__, __LINE__);
            KRML_HOST_EXIT(253U);
        }
    }
}

void
Hacl_Hash_SHA3_update_multi_sha3(
    Spec_Hash_Definitions_hash_alg a,
    uint64_t *s,
    uint8_t *blocks,
    uint32_t n_blocks)
{
    for (uint32_t i = (uint32_t)0U; i < n_blocks; i++) {
        uint8_t *block = blocks + i * block_len(a);
        Hacl_Impl_SHA3_absorb_inner(block_len(a), block, s);
    }
}

void
Hacl_Hash_SHA3_update_last_sha3(
    Spec_Hash_Definitions_hash_alg a,
    uint64_t *s,
    uint8_t *input,
    uint32_t input_len)
{
    uint8_t suffix;
    if (a == Spec_Hash_Definitions_Shake128 || a == Spec_Hash_Definitions_Shake256) {
        suffix = (uint8_t)0x1fU;
    } else {
        suffix = (uint8_t)0x06U;
    }
    uint32_t len = block_len(a);
    if (input_len == len) {
        Hacl_Impl_SHA3_absorb_inner(len, input, s);
        uint8_t *uu____0 = input + input_len;
        uint8_t lastBlock_[200U] = { 0U };
        uint8_t *lastBlock = lastBlock_;
        memcpy(lastBlock, uu____0, (uint32_t)0U * sizeof(uint8_t));
        lastBlock[0U] = suffix;
        Hacl_Impl_SHA3_loadState(len, lastBlock, s);
        if (!((suffix & (uint8_t)0x80U) == (uint8_t)0U) && (uint32_t)0U == len - (uint32_t)1U) {
            Hacl_Impl_SHA3_state_permute(s);
        }
        uint8_t nextBlock_[200U] = { 0U };
        uint8_t *nextBlock = nextBlock_;
        nextBlock[len - (uint32_t)1U] = (uint8_t)0x80U;
        Hacl_Impl_SHA3_loadState(len, nextBlock, s);
        Hacl_Impl_SHA3_state_permute(s);
        return;
    }
    uint8_t lastBlock_[200U] = { 0U };
    uint8_t *lastBlock = lastBlock_;
    memcpy(lastBlock, input, input_len * sizeof(uint8_t));
    lastBlock[input_len] = suffix;
    Hacl_Impl_SHA3_loadState(len, lastBlock, s);
    if (!((suffix & (uint8_t)0x80U) == (uint8_t)0U) && input_len == len - (uint32_t)1U) {
        Hacl_Impl_SHA3_state_permute(s);
    }
    uint8_t nextBlock_[200U] = { 0U };
    uint8_t *nextBlock = nextBlock_;
    nextBlock[len - (uint32_t)1U] = (uint8_t)0x80U;
    Hacl_Impl_SHA3_loadState(len, nextBlock, s);
    Hacl_Impl_SHA3_state_permute(s);
}

typedef struct hash_buf2_s {
    Hacl_Streaming_Keccak_hash_buf fst;
    Hacl_Streaming_Keccak_hash_buf snd;
} hash_buf2;

Spec_Hash_Definitions_hash_alg
Hacl_Streaming_Keccak_get_alg(Hacl_Streaming_Keccak_state *s)
{
    Hacl_Streaming_Keccak_state scrut = *s;
    Hacl_Streaming_Keccak_hash_buf block_state = scrut.block_state;
    return block_state.fst;
}

Hacl_Streaming_Keccak_state *
Hacl_Streaming_Keccak_malloc(Spec_Hash_Definitions_hash_alg a)
{
    KRML_CHECK_SIZE(sizeof(uint8_t), block_len(a));
    uint8_t *buf0 = (uint8_t *)KRML_HOST_CALLOC(block_len(a), sizeof(uint8_t));
    uint64_t *buf = (uint64_t *)KRML_HOST_CALLOC((uint32_t)25U, sizeof(uint64_t));
    Hacl_Streaming_Keccak_hash_buf block_state = { .fst = a, .snd = buf };
    Hacl_Streaming_Keccak_state
        s = { .block_state = block_state, .buf = buf0, .total_len = (uint64_t)(uint32_t)0U };
    Hacl_Streaming_Keccak_state
        *p = (Hacl_Streaming_Keccak_state *)KRML_HOST_MALLOC(sizeof(Hacl_Streaming_Keccak_state));
    p[0U] = s;
    uint64_t *s1 = block_state.snd;
    memset(s1, 0U, (uint32_t)25U * sizeof(uint64_t));
    return p;
}

void
Hacl_Streaming_Keccak_free(Hacl_Streaming_Keccak_state *s)
{
    Hacl_Streaming_Keccak_state scrut = *s;
    uint8_t *buf = scrut.buf;
    Hacl_Streaming_Keccak_hash_buf block_state = scrut.block_state;
    uint64_t *s1 = block_state.snd;
    KRML_HOST_FREE(s1);
    KRML_HOST_FREE(buf);
    KRML_HOST_FREE(s);
}

Hacl_Streaming_Keccak_state *
Hacl_Streaming_Keccak_copy(Hacl_Streaming_Keccak_state *s0)
{
    Hacl_Streaming_Keccak_state scrut0 = *s0;
    Hacl_Streaming_Keccak_hash_buf block_state0 = scrut0.block_state;
    uint8_t *buf0 = scrut0.buf;
    uint64_t total_len0 = scrut0.total_len;
    Spec_Hash_Definitions_hash_alg i = block_state0.fst;
    KRML_CHECK_SIZE(sizeof(uint8_t), block_len(i));
    uint8_t *buf1 = (uint8_t *)KRML_HOST_CALLOC(block_len(i), sizeof(uint8_t));
    memcpy(buf1, buf0, block_len(i) * sizeof(uint8_t));
    uint64_t *buf = (uint64_t *)KRML_HOST_CALLOC((uint32_t)25U, sizeof(uint64_t));
    Hacl_Streaming_Keccak_hash_buf block_state = { .fst = i, .snd = buf };
    hash_buf2 scrut = { .fst = block_state0, .snd = block_state };
    uint64_t *s_dst = scrut.snd.snd;
    uint64_t *s_src = scrut.fst.snd;
    memcpy(s_dst, s_src, (uint32_t)25U * sizeof(uint64_t));
    Hacl_Streaming_Keccak_state
        s = { .block_state = block_state, .buf = buf1, .total_len = total_len0 };
    Hacl_Streaming_Keccak_state
        *p = (Hacl_Streaming_Keccak_state *)KRML_HOST_MALLOC(sizeof(Hacl_Streaming_Keccak_state));
    p[0U] = s;
    return p;
}

void
Hacl_Streaming_Keccak_reset(Hacl_Streaming_Keccak_state *s)
{
    Hacl_Streaming_Keccak_state scrut = *s;
    uint8_t *buf = scrut.buf;
    Hacl_Streaming_Keccak_hash_buf block_state = scrut.block_state;
    Spec_Hash_Definitions_hash_alg i = block_state.fst;
    KRML_HOST_IGNORE(i);
    uint64_t *s1 = block_state.snd;
    memset(s1, 0U, (uint32_t)25U * sizeof(uint64_t));
    Hacl_Streaming_Keccak_state
        tmp = { .block_state = block_state, .buf = buf, .total_len = (uint64_t)(uint32_t)0U };
    s[0U] = tmp;
}

Hacl_Streaming_Types_error_code
Hacl_Streaming_Keccak_update(Hacl_Streaming_Keccak_state *p, uint8_t *data, uint32_t len)
{
    Hacl_Streaming_Keccak_state s = *p;
    Hacl_Streaming_Keccak_hash_buf block_state = s.block_state;
    uint64_t total_len = s.total_len;
    Spec_Hash_Definitions_hash_alg i = block_state.fst;
    if ((uint64_t)len > (uint64_t)0xFFFFFFFFFFFFFFFFU - total_len) {
        return Hacl_Streaming_Types_MaximumLengthExceeded;
    }
    uint32_t sz;
    if (total_len % (uint64_t)block_len(i) == (uint64_t)0U && total_len > (uint64_t)0U) {
        sz = block_len(i);
    } else {
        sz = (uint32_t)(total_len % (uint64_t)block_len(i));
    }
    if (len <= block_len(i) - sz) {
        Hacl_Streaming_Keccak_state s1 = *p;
        Hacl_Streaming_Keccak_hash_buf block_state1 = s1.block_state;
        uint8_t *buf = s1.buf;
        uint64_t total_len1 = s1.total_len;
        uint32_t sz1;
        if (total_len1 % (uint64_t)block_len(i) == (uint64_t)0U && total_len1 > (uint64_t)0U) {
            sz1 = block_len(i);
        } else {
            sz1 = (uint32_t)(total_len1 % (uint64_t)block_len(i));
        }
        uint8_t *buf2 = buf + sz1;
        memcpy(buf2, data, len * sizeof(uint8_t));
        uint64_t total_len2 = total_len1 + (uint64_t)len;
        *p =
            ((Hacl_Streaming_Keccak_state){
                .block_state = block_state1,
                .buf = buf,
                .total_len = total_len2 });
    } else if (sz == (uint32_t)0U) {
        Hacl_Streaming_Keccak_state s1 = *p;
        Hacl_Streaming_Keccak_hash_buf block_state1 = s1.block_state;
        uint8_t *buf = s1.buf;
        uint64_t total_len1 = s1.total_len;
        uint32_t sz1;
        if (total_len1 % (uint64_t)block_len(i) == (uint64_t)0U && total_len1 > (uint64_t)0U) {
            sz1 = block_len(i);
        } else {
            sz1 = (uint32_t)(total_len1 % (uint64_t)block_len(i));
        }
        if (!(sz1 == (uint32_t)0U)) {
            Spec_Hash_Definitions_hash_alg a1 = block_state1.fst;
            uint64_t *s2 = block_state1.snd;
            Hacl_Hash_SHA3_update_multi_sha3(a1, s2, buf, block_len(i) / block_len(a1));
        }
        uint32_t ite;
        if ((uint64_t)len % (uint64_t)block_len(i) == (uint64_t)0U && (uint64_t)len > (uint64_t)0U) {
            ite = block_len(i);
        } else {
            ite = (uint32_t)((uint64_t)len % (uint64_t)block_len(i));
        }
        uint32_t n_blocks = (len - ite) / block_len(i);
        uint32_t data1_len = n_blocks * block_len(i);
        uint32_t data2_len = len - data1_len;
        uint8_t *data1 = data;
        uint8_t *data2 = data + data1_len;
        Spec_Hash_Definitions_hash_alg a1 = block_state1.fst;
        uint64_t *s2 = block_state1.snd;
        Hacl_Hash_SHA3_update_multi_sha3(a1, s2, data1, data1_len / block_len(a1));
        uint8_t *dst = buf;
        memcpy(dst, data2, data2_len * sizeof(uint8_t));
        *p =
            ((Hacl_Streaming_Keccak_state){
                .block_state = block_state1,
                .buf = buf,
                .total_len = total_len1 + (uint64_t)len });
    } else {
        uint32_t diff = block_len(i) - sz;
        uint8_t *data1 = data;
        uint8_t *data2 = data + diff;
        Hacl_Streaming_Keccak_state s1 = *p;
        Hacl_Streaming_Keccak_hash_buf block_state10 = s1.block_state;
        uint8_t *buf0 = s1.buf;
        uint64_t total_len10 = s1.total_len;
        uint32_t sz10;
        if (total_len10 % (uint64_t)block_len(i) == (uint64_t)0U && total_len10 > (uint64_t)0U) {
            sz10 = block_len(i);
        } else {
            sz10 = (uint32_t)(total_len10 % (uint64_t)block_len(i));
        }
        uint8_t *buf2 = buf0 + sz10;
        memcpy(buf2, data1, diff * sizeof(uint8_t));
        uint64_t total_len2 = total_len10 + (uint64_t)diff;
        *p =
            ((Hacl_Streaming_Keccak_state){
                .block_state = block_state10,
                .buf = buf0,
                .total_len = total_len2 });
        Hacl_Streaming_Keccak_state s10 = *p;
        Hacl_Streaming_Keccak_hash_buf block_state1 = s10.block_state;
        uint8_t *buf = s10.buf;
        uint64_t total_len1 = s10.total_len;
        uint32_t sz1;
        if (total_len1 % (uint64_t)block_len(i) == (uint64_t)0U && total_len1 > (uint64_t)0U) {
            sz1 = block_len(i);
        } else {
            sz1 = (uint32_t)(total_len1 % (uint64_t)block_len(i));
        }
        if (!(sz1 == (uint32_t)0U)) {
            Spec_Hash_Definitions_hash_alg a1 = block_state1.fst;
            uint64_t *s2 = block_state1.snd;
            Hacl_Hash_SHA3_update_multi_sha3(a1, s2, buf, block_len(i) / block_len(a1));
        }
        uint32_t ite;
        if (
            (uint64_t)(len - diff) % (uint64_t)block_len(i) == (uint64_t)0U && (uint64_t)(len - diff) > (uint64_t)0U) {
            ite = block_len(i);
        } else {
            ite = (uint32_t)((uint64_t)(len - diff) % (uint64_t)block_len(i));
        }
        uint32_t n_blocks = (len - diff - ite) / block_len(i);
        uint32_t data1_len = n_blocks * block_len(i);
        uint32_t data2_len = len - diff - data1_len;
        uint8_t *data11 = data2;
        uint8_t *data21 = data2 + data1_len;
        Spec_Hash_Definitions_hash_alg a1 = block_state1.fst;
        uint64_t *s2 = block_state1.snd;
        Hacl_Hash_SHA3_update_multi_sha3(a1, s2, data11, data1_len / block_len(a1));
        uint8_t *dst = buf;
        memcpy(dst, data21, data2_len * sizeof(uint8_t));
        *p =
            ((Hacl_Streaming_Keccak_state){
                .block_state = block_state1,
                .buf = buf,
                .total_len = total_len1 + (uint64_t)(len - diff) });
    }
    return Hacl_Streaming_Types_Success;
}

static void
finish_(
    Spec_Hash_Definitions_hash_alg a,
    Hacl_Streaming_Keccak_state *p,
    uint8_t *dst,
    uint32_t l)
{
    Hacl_Streaming_Keccak_state scrut0 = *p;
    Hacl_Streaming_Keccak_hash_buf block_state = scrut0.block_state;
    uint8_t *buf_ = scrut0.buf;
    uint64_t total_len = scrut0.total_len;
    uint32_t r;
    if (total_len % (uint64_t)block_len(a) == (uint64_t)0U && total_len > (uint64_t)0U) {
        r = block_len(a);
    } else {
        r = (uint32_t)(total_len % (uint64_t)block_len(a));
    }
    uint8_t *buf_1 = buf_;
    uint64_t buf[25U] = { 0U };
    Hacl_Streaming_Keccak_hash_buf tmp_block_state = { .fst = a, .snd = buf };
    hash_buf2 scrut = { .fst = block_state, .snd = tmp_block_state };
    uint64_t *s_dst = scrut.snd.snd;
    uint64_t *s_src = scrut.fst.snd;
    memcpy(s_dst, s_src, (uint32_t)25U * sizeof(uint64_t));
    uint32_t ite;
    if (r % block_len(a) == (uint32_t)0U && r > (uint32_t)0U) {
        ite = block_len(a);
    } else {
        ite = r % block_len(a);
    }
    uint8_t *buf_last = buf_1 + r - ite;
    uint8_t *buf_multi = buf_1;
    Spec_Hash_Definitions_hash_alg a1 = tmp_block_state.fst;
    uint64_t *s0 = tmp_block_state.snd;
    Hacl_Hash_SHA3_update_multi_sha3(a1, s0, buf_multi, (uint32_t)0U / block_len(a1));
    Spec_Hash_Definitions_hash_alg a10 = tmp_block_state.fst;
    uint64_t *s1 = tmp_block_state.snd;
    Hacl_Hash_SHA3_update_last_sha3(a10, s1, buf_last, r);
    Spec_Hash_Definitions_hash_alg a11 = tmp_block_state.fst;
    uint64_t *s = tmp_block_state.snd;
    if (a11 == Spec_Hash_Definitions_Shake128 || a11 == Spec_Hash_Definitions_Shake256) {
        Hacl_Impl_SHA3_squeeze(s, block_len(a11), l, dst);
        return;
    }
    Hacl_Impl_SHA3_squeeze(s, block_len(a11), hash_len(a11), dst);
}

Hacl_Streaming_Types_error_code
Hacl_Streaming_Keccak_finish(Hacl_Streaming_Keccak_state *s, uint8_t *dst)
{
    Spec_Hash_Definitions_hash_alg a1 = Hacl_Streaming_Keccak_get_alg(s);
    if (a1 == Spec_Hash_Definitions_Shake128 || a1 == Spec_Hash_Definitions_Shake256) {
        return Hacl_Streaming_Types_InvalidAlgorithm;
    }
    finish_(a1, s, dst, hash_len(a1));
    return Hacl_Streaming_Types_Success;
}

Hacl_Streaming_Types_error_code
Hacl_Streaming_Keccak_squeeze(Hacl_Streaming_Keccak_state *s, uint8_t *dst, uint32_t l)
{
    Spec_Hash_Definitions_hash_alg a1 = Hacl_Streaming_Keccak_get_alg(s);
    if (!(a1 == Spec_Hash_Definitions_Shake128 || a1 == Spec_Hash_Definitions_Shake256)) {
        return Hacl_Streaming_Types_InvalidAlgorithm;
    }
    if (l == (uint32_t)0U) {
        return Hacl_Streaming_Types_InvalidLength;
    }
    finish_(a1, s, dst, l);
    return Hacl_Streaming_Types_Success;
}

uint32_t
Hacl_Streaming_Keccak_block_len(Hacl_Streaming_Keccak_state *s)
{
    Spec_Hash_Definitions_hash_alg a1 = Hacl_Streaming_Keccak_get_alg(s);
    return block_len(a1);
}

uint32_t
Hacl_Streaming_Keccak_hash_len(Hacl_Streaming_Keccak_state *s)
{
    Spec_Hash_Definitions_hash_alg a1 = Hacl_Streaming_Keccak_get_alg(s);
    return hash_len(a1);
}

bool
Hacl_Streaming_Keccak_is_shake(Hacl_Streaming_Keccak_state *s)
{
    Spec_Hash_Definitions_hash_alg uu____0 = Hacl_Streaming_Keccak_get_alg(s);
    return uu____0 == Spec_Hash_Definitions_Shake128 || uu____0 == Spec_Hash_Definitions_Shake256;
}

void
Hacl_SHA3_shake128_hacl(
    uint32_t inputByteLen,
    uint8_t *input,
    uint32_t outputByteLen,
    uint8_t *output)
{
    Hacl_Impl_SHA3_keccak((uint32_t)1344U,
                          (uint32_t)256U,
                          inputByteLen,
                          input,
                          (uint8_t)0x1FU,
                          outputByteLen,
                          output);
}

void
Hacl_SHA3_shake256_hacl(
    uint32_t inputByteLen,
    uint8_t *input,
    uint32_t outputByteLen,
    uint8_t *output)
{
    Hacl_Impl_SHA3_keccak((uint32_t)1088U,
                          (uint32_t)512U,
                          inputByteLen,
                          input,
                          (uint8_t)0x1FU,
                          outputByteLen,
                          output);
}

void
Hacl_SHA3_sha3_224(uint32_t inputByteLen, uint8_t *input, uint8_t *output)
{
    Hacl_Impl_SHA3_keccak((uint32_t)1152U,
                          (uint32_t)448U,
                          inputByteLen,
                          input,
                          (uint8_t)0x06U,
                          (uint32_t)28U,
                          output);
}

void
Hacl_SHA3_sha3_256(uint32_t inputByteLen, uint8_t *input, uint8_t *output)
{
    Hacl_Impl_SHA3_keccak((uint32_t)1088U,
                          (uint32_t)512U,
                          inputByteLen,
                          input,
                          (uint8_t)0x06U,
                          (uint32_t)32U,
                          output);
}

void
Hacl_SHA3_sha3_384(uint32_t inputByteLen, uint8_t *input, uint8_t *output)
{
    Hacl_Impl_SHA3_keccak((uint32_t)832U,
                          (uint32_t)768U,
                          inputByteLen,
                          input,
                          (uint8_t)0x06U,
                          (uint32_t)48U,
                          output);
}

void
Hacl_SHA3_sha3_512(uint32_t inputByteLen, uint8_t *input, uint8_t *output)
{
    Hacl_Impl_SHA3_keccak((uint32_t)576U,
                          (uint32_t)1024U,
                          inputByteLen,
                          input,
                          (uint8_t)0x06U,
                          (uint32_t)64U,
                          output);
}

static const uint32_t
    keccak_rotc[24U] = {
        (uint32_t)1U, (uint32_t)3U, (uint32_t)6U, (uint32_t)10U, (uint32_t)15U, (uint32_t)21U,
        (uint32_t)28U, (uint32_t)36U, (uint32_t)45U, (uint32_t)55U, (uint32_t)2U, (uint32_t)14U,
        (uint32_t)27U, (uint32_t)41U, (uint32_t)56U, (uint32_t)8U, (uint32_t)25U, (uint32_t)43U,
        (uint32_t)62U, (uint32_t)18U, (uint32_t)39U, (uint32_t)61U, (uint32_t)20U, (uint32_t)44U
    };

static const uint32_t
    keccak_piln[24U] = {
        (uint32_t)10U, (uint32_t)7U, (uint32_t)11U, (uint32_t)17U, (uint32_t)18U, (uint32_t)3U,
        (uint32_t)5U, (uint32_t)16U, (uint32_t)8U, (uint32_t)21U, (uint32_t)24U, (uint32_t)4U,
        (uint32_t)15U, (uint32_t)23U, (uint32_t)19U, (uint32_t)13U, (uint32_t)12U, (uint32_t)2U,
        (uint32_t)20U, (uint32_t)14U, (uint32_t)22U, (uint32_t)9U, (uint32_t)6U, (uint32_t)1U
    };

static const uint64_t
    keccak_rndc[24U] = {
        (uint64_t)0x0000000000000001U, (uint64_t)0x0000000000008082U, (uint64_t)0x800000000000808aU,
        (uint64_t)0x8000000080008000U, (uint64_t)0x000000000000808bU, (uint64_t)0x0000000080000001U,
        (uint64_t)0x8000000080008081U, (uint64_t)0x8000000000008009U, (uint64_t)0x000000000000008aU,
        (uint64_t)0x0000000000000088U, (uint64_t)0x0000000080008009U, (uint64_t)0x000000008000000aU,
        (uint64_t)0x000000008000808bU, (uint64_t)0x800000000000008bU, (uint64_t)0x8000000000008089U,
        (uint64_t)0x8000000000008003U, (uint64_t)0x8000000000008002U, (uint64_t)0x8000000000000080U,
        (uint64_t)0x000000000000800aU, (uint64_t)0x800000008000000aU, (uint64_t)0x8000000080008081U,
        (uint64_t)0x8000000000008080U, (uint64_t)0x0000000080000001U, (uint64_t)0x8000000080008008U
    };

void
Hacl_Impl_SHA3_state_permute(uint64_t *s)
{
    for (uint32_t i0 = (uint32_t)0U; i0 < (uint32_t)24U; i0++) {
        uint64_t _C[5U] = { 0U };
        KRML_MAYBE_FOR5(i,
                        (uint32_t)0U,
                        (uint32_t)5U,
                        (uint32_t)1U,
                        _C[i] =
                            s[i + (uint32_t)0U] ^
                            (s[i + (uint32_t)5U] ^ (s[i + (uint32_t)10U] ^ (s[i + (uint32_t)15U] ^ s[i + (uint32_t)20U]))););
        KRML_MAYBE_FOR5(i1,
                        (uint32_t)0U,
                        (uint32_t)5U,
                        (uint32_t)1U,
                        uint64_t uu____0 = _C[(i1 + (uint32_t)1U) % (uint32_t)5U];
                        uint64_t
                            _D =
                                _C[(i1 + (uint32_t)4U) % (uint32_t)5U] ^ (uu____0 << (uint32_t)1U | uu____0 >> (uint32_t)63U);
                        KRML_MAYBE_FOR5(i,
                                        (uint32_t)0U,
                                        (uint32_t)5U,
                                        (uint32_t)1U,
                                        s[i1 + (uint32_t)5U * i] = s[i1 + (uint32_t)5U * i] ^ _D;););
        uint64_t x = s[1U];
        uint64_t current = x;
        for (uint32_t i = (uint32_t)0U; i < (uint32_t)24U; i++) {
            uint32_t _Y = keccak_piln[i];
            uint32_t r = keccak_rotc[i];
            uint64_t temp = s[_Y];
            uint64_t uu____1 = current;
            s[_Y] = uu____1 << r | uu____1 >> ((uint32_t)64U - r);
            current = temp;
        }
        KRML_MAYBE_FOR5(i,
                        (uint32_t)0U,
                        (uint32_t)5U,
                        (uint32_t)1U,
                        uint64_t
                            v0 =
                                s[(uint32_t)0U + (uint32_t)5U * i] ^ (~s[(uint32_t)1U + (uint32_t)5U * i] & s[(uint32_t)2U + (uint32_t)5U * i]);
                        uint64_t
                            v1 =
                                s[(uint32_t)1U + (uint32_t)5U * i] ^ (~s[(uint32_t)2U + (uint32_t)5U * i] & s[(uint32_t)3U + (uint32_t)5U * i]);
                        uint64_t
                            v2 =
                                s[(uint32_t)2U + (uint32_t)5U * i] ^ (~s[(uint32_t)3U + (uint32_t)5U * i] & s[(uint32_t)4U + (uint32_t)5U * i]);
                        uint64_t
                            v3 =
                                s[(uint32_t)3U + (uint32_t)5U * i] ^ (~s[(uint32_t)4U + (uint32_t)5U * i] & s[(uint32_t)0U + (uint32_t)5U * i]);
                        uint64_t
                            v4 =
                                s[(uint32_t)4U + (uint32_t)5U * i] ^ (~s[(uint32_t)0U + (uint32_t)5U * i] & s[(uint32_t)1U + (uint32_t)5U * i]);
                        s[(uint32_t)0U + (uint32_t)5U * i] = v0;
                        s[(uint32_t)1U + (uint32_t)5U * i] = v1;
                        s[(uint32_t)2U + (uint32_t)5U * i] = v2;
                        s[(uint32_t)3U + (uint32_t)5U * i] = v3;
                        s[(uint32_t)4U + (uint32_t)5U * i] = v4;);
        uint64_t c = keccak_rndc[i0];
        s[0U] = s[0U] ^ c;
    }
}

void
Hacl_Impl_SHA3_loadState(uint32_t rateInBytes, uint8_t *input, uint64_t *s)
{
    uint8_t block[200U] = { 0U };
    memcpy(block, input, rateInBytes * sizeof(uint8_t));
    for (uint32_t i = (uint32_t)0U; i < (uint32_t)25U; i++) {
        uint64_t u = load64_le(block + i * (uint32_t)8U);
        uint64_t x = u;
        s[i] = s[i] ^ x;
    }
}

static void
storeState(uint32_t rateInBytes, uint64_t *s, uint8_t *res)
{
    uint8_t block[200U] = { 0U };
    for (uint32_t i = (uint32_t)0U; i < (uint32_t)25U; i++) {
        uint64_t sj = s[i];
        store64_le(block + i * (uint32_t)8U, sj);
    }
    memcpy(res, block, rateInBytes * sizeof(uint8_t));
}

void
Hacl_Impl_SHA3_absorb_inner(uint32_t rateInBytes, uint8_t *block, uint64_t *s)
{
    Hacl_Impl_SHA3_loadState(rateInBytes, block, s);
    Hacl_Impl_SHA3_state_permute(s);
}

static void
absorb(
    uint64_t *s,
    uint32_t rateInBytes,
    uint32_t inputByteLen,
    uint8_t *input,
    uint8_t delimitedSuffix)
{
    uint32_t n_blocks = inputByteLen / rateInBytes;
    uint32_t rem = inputByteLen % rateInBytes;
    for (uint32_t i = (uint32_t)0U; i < n_blocks; i++) {
        uint8_t *block = input + i * rateInBytes;
        Hacl_Impl_SHA3_absorb_inner(rateInBytes, block, s);
    }
    uint8_t *last = input + n_blocks * rateInBytes;
    uint8_t lastBlock_[200U] = { 0U };
    uint8_t *lastBlock = lastBlock_;
    memcpy(lastBlock, last, rem * sizeof(uint8_t));
    lastBlock[rem] = delimitedSuffix;
    Hacl_Impl_SHA3_loadState(rateInBytes, lastBlock, s);
    if (!((delimitedSuffix & (uint8_t)0x80U) == (uint8_t)0U) && rem == rateInBytes - (uint32_t)1U) {
        Hacl_Impl_SHA3_state_permute(s);
    }
    uint8_t nextBlock_[200U] = { 0U };
    uint8_t *nextBlock = nextBlock_;
    nextBlock[rateInBytes - (uint32_t)1U] = (uint8_t)0x80U;
    Hacl_Impl_SHA3_loadState(rateInBytes, nextBlock, s);
    Hacl_Impl_SHA3_state_permute(s);
}

void
Hacl_Impl_SHA3_squeeze(
    uint64_t *s,
    uint32_t rateInBytes,
    uint32_t outputByteLen,
    uint8_t *output)
{
    uint32_t outBlocks = outputByteLen / rateInBytes;
    uint32_t remOut = outputByteLen % rateInBytes;
    uint8_t *last = output + outputByteLen - remOut;
    uint8_t *blocks = output;
    for (uint32_t i = (uint32_t)0U; i < outBlocks; i++) {
        storeState(rateInBytes, s, blocks + i * rateInBytes);
        Hacl_Impl_SHA3_state_permute(s);
    }
    storeState(remOut, s, last);
}

void
Hacl_Impl_SHA3_keccak(
    uint32_t rate,
    uint32_t capacity,
    uint32_t inputByteLen,
    uint8_t *input,
    uint8_t delimitedSuffix,
    uint32_t outputByteLen,
    uint8_t *output)
{
    uint32_t rateInBytes = rate / (uint32_t)8U;
    uint64_t s[25U] = { 0U };
    absorb(s, rateInBytes, inputByteLen, input, delimitedSuffix);
    Hacl_Impl_SHA3_squeeze(s, rateInBytes, outputByteLen, output);
}
