/*
 *  FIPS-180-2 compliant SHA-384/512 implementation
 *
 *  Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
 *  not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 *  This file is part of mbed TLS (https://tls.mbed.org)
 */
/*
 *  The SHA-512 Secure Hash Standard was published by NIST in 2002.
 *
 *  http://csrc.nist.gov/publications/fips/fips180-2/fips180-2.pdf
 */
/*
 * Copyright 2019-2020 NXP
 * All rights reserved.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */
#if !defined(MBEDTLS_CONFIG_FILE)
#include "mbedtls/config.h"
#else
#include MBEDTLS_CONFIG_FILE
#endif

#if defined(MBEDTLS_SHA512_C)

#include "mbedtls/sha512.h"
#include "mbedtls/platform_util.h"

#if defined(_MSC_VER) || defined(__WATCOMC__)
#define UL64(x) x##ui64
#else
#define UL64(x) x##ULL
#endif

#include <string.h>
#include "sssapi_mbedtls.h"

#if defined(MBEDTLS_PLATFORM_C)
#include "mbedtls/platform.h"
#else
#include <stdlib.h>
#define mbedtls_calloc calloc
#define mbedtls_free free
#endif /* MBEDTLS_PLATFORM_C */

#define SHA512_VALIDATE_RET(cond) MBEDTLS_INTERNAL_VALIDATE_RET(cond, MBEDTLS_ERR_SHA512_BAD_INPUT_DATA)
#define SHA512_VALIDATE(cond) MBEDTLS_INTERNAL_VALIDATE(cond)

#ifndef GET_UINT64_BE
#define GET_UINT64_BE(n, b, i)                                                                                   \
    {                                                                                                            \
        (n) = ((uint64_t)(b)[(i)] << 56) | ((uint64_t)(b)[(i) + 1] << 48) | ((uint64_t)(b)[(i) + 2] << 40) |     \
              ((uint64_t)(b)[(i) + 3] << 32) | ((uint64_t)(b)[(i) + 4] << 24) | ((uint64_t)(b)[(i) + 5] << 16) | \
              ((uint64_t)(b)[(i) + 6] << 8) | ((uint64_t)(b)[(i) + 7]);                                          \
    }
#endif /* GET_UINT64_BE */

#ifndef PUT_UINT64_BE
#define PUT_UINT64_BE(n, b, i)                     \
    {                                              \
        (b)[(i)]     = (unsigned char)((n) >> 56); \
        (b)[(i) + 1] = (unsigned char)((n) >> 48); \
        (b)[(i) + 2] = (unsigned char)((n) >> 40); \
        (b)[(i) + 3] = (unsigned char)((n) >> 32); \
        (b)[(i) + 4] = (unsigned char)((n) >> 24); \
        (b)[(i) + 5] = (unsigned char)((n) >> 16); \
        (b)[(i) + 6] = (unsigned char)((n) >> 8);  \
        (b)[(i) + 7] = (unsigned char)((n));       \
    }
#endif /* PUT_UINT64_BE */

#if defined(MBEDTLS_SHA512_ALT)

void mbedtls_sha512_init(mbedtls_sha512_context *ctx)
{
    SHA512_VALIDATE(ctx != NULL);

    memset(ctx, 0, sizeof(mbedtls_sha512_context));
}

void mbedtls_sha512_free(mbedtls_sha512_context *ctx)
{
    if (ctx == NULL)
        return;
    mbedtls_platform_zeroize(ctx, sizeof(mbedtls_sha512_context));
}

void mbedtls_sha512_clone(mbedtls_sha512_context *dst, const mbedtls_sha512_context *src)
{
    SHA512_VALIDATE(dst != NULL);
    SHA512_VALIDATE(src != NULL);

    *dst = *src;
}

#if !defined(MBEDTLS_SHA512_PROCESS_ALT)

/*
 * Round constants
 */
static const uint64_t K[80] = {
    UL64(0x428A2F98D728AE22), UL64(0x7137449123EF65CD), UL64(0xB5C0FBCFEC4D3B2F), UL64(0xE9B5DBA58189DBBC),
    UL64(0x3956C25BF348B538), UL64(0x59F111F1B605D019), UL64(0x923F82A4AF194F9B), UL64(0xAB1C5ED5DA6D8118),
    UL64(0xD807AA98A3030242), UL64(0x12835B0145706FBE), UL64(0x243185BE4EE4B28C), UL64(0x550C7DC3D5FFB4E2),
    UL64(0x72BE5D74F27B896F), UL64(0x80DEB1FE3B1696B1), UL64(0x9BDC06A725C71235), UL64(0xC19BF174CF692694),
    UL64(0xE49B69C19EF14AD2), UL64(0xEFBE4786384F25E3), UL64(0x0FC19DC68B8CD5B5), UL64(0x240CA1CC77AC9C65),
    UL64(0x2DE92C6F592B0275), UL64(0x4A7484AA6EA6E483), UL64(0x5CB0A9DCBD41FBD4), UL64(0x76F988DA831153B5),
    UL64(0x983E5152EE66DFAB), UL64(0xA831C66D2DB43210), UL64(0xB00327C898FB213F), UL64(0xBF597FC7BEEF0EE4),
    UL64(0xC6E00BF33DA88FC2), UL64(0xD5A79147930AA725), UL64(0x06CA6351E003826F), UL64(0x142929670A0E6E70),
    UL64(0x27B70A8546D22FFC), UL64(0x2E1B21385C26C926), UL64(0x4D2C6DFC5AC42AED), UL64(0x53380D139D95B3DF),
    UL64(0x650A73548BAF63DE), UL64(0x766A0ABB3C77B2A8), UL64(0x81C2C92E47EDAEE6), UL64(0x92722C851482353B),
    UL64(0xA2BFE8A14CF10364), UL64(0xA81A664BBC423001), UL64(0xC24B8B70D0F89791), UL64(0xC76C51A30654BE30),
    UL64(0xD192E819D6EF5218), UL64(0xD69906245565A910), UL64(0xF40E35855771202A), UL64(0x106AA07032BBD1B8),
    UL64(0x19A4C116B8D2D0C8), UL64(0x1E376C085141AB53), UL64(0x2748774CDF8EEB99), UL64(0x34B0BCB5E19B48A8),
    UL64(0x391C0CB3C5C95A63), UL64(0x4ED8AA4AE3418ACB), UL64(0x5B9CCA4F7763E373), UL64(0x682E6FF3D6B2B8A3),
    UL64(0x748F82EE5DEFB2FC), UL64(0x78A5636F43172F60), UL64(0x84C87814A1F0AB72), UL64(0x8CC702081A6439EC),
    UL64(0x90BEFFFA23631E28), UL64(0xA4506CEBDE82BDE9), UL64(0xBEF9A3F7B2C67915), UL64(0xC67178F2E372532B),
    UL64(0xCA273ECEEA26619C), UL64(0xD186B8C721C0C207), UL64(0xEADA7DD6CDE0EB1E), UL64(0xF57D4F7FEE6ED178),
    UL64(0x06F067AA72176FBA), UL64(0x0A637DC5A2C898A6), UL64(0x113F9804BEF90DAE), UL64(0x1B710B35131C471B),
    UL64(0x28DB77F523047D84), UL64(0x32CAAB7B40C72493), UL64(0x3C9EBE0A15C9BEBC), UL64(0x431D67C49C100D4C),
    UL64(0x4CC5D4BECB3E42B6), UL64(0x597F299CFC657E2A), UL64(0x5FCB6FAB3AD6FAEC), UL64(0x6C44198C4A475817)};

int mbedtls_internal_sha512_process(mbedtls_sha512_context *ctx, const unsigned char data[128])
{
    int i;
    uint64_t temp1, temp2, W[80];
    uint64_t A, B, C, D, E, F, G, H;

    SHA512_VALIDATE_RET(ctx != NULL);
    SHA512_VALIDATE_RET((const unsigned char *)data != NULL);

#define SHR(x, n) ((x) >> (n))
#define ROTR(x, n) (SHR((x), (n)) | ((x) << (64 - (n))))

#define S0(x) (ROTR(x, 1) ^ ROTR(x, 8) ^ SHR(x, 7))
#define S1(x) (ROTR(x, 19) ^ ROTR(x, 61) ^ SHR(x, 6))

#define S2(x) (ROTR(x, 28) ^ ROTR(x, 34) ^ ROTR(x, 39))
#define S3(x) (ROTR(x, 14) ^ ROTR(x, 18) ^ ROTR(x, 41))

#define F0(x, y, z) (((x) & (y)) | ((z) & ((x) | (y))))
#define F1(x, y, z) ((z) ^ ((x) & ((y) ^ (z))))

#define P(a, b, c, d, e, f, g, h, x, K)                      \
    do                                                       \
    {                                                        \
        temp1 = (h) + S3(e) + F1((e), (f), (g)) + (K) + (x); \
        temp2 = S2(a) + F0((a), (b), (c));                   \
        (d) += temp1;                                        \
        (h) = temp1 + temp2;                                 \
    } while (0)

    for (i = 0; i < 16; i++)
    {
        GET_UINT64_BE(W[i], data, i << 3);
    }

    for (; i < 80; i++)
    {
        W[i] = S1(W[i - 2]) + W[i - 7] + S0(W[i - 15]) + W[i - 16];
    }

    A = ctx->state[0];
    B = ctx->state[1];
    C = ctx->state[2];
    D = ctx->state[3];
    E = ctx->state[4];
    F = ctx->state[5];
    G = ctx->state[6];
    H = ctx->state[7];
    i = 0;

    do
    {
        P(A, B, C, D, E, F, G, H, W[i], K[i]);
        i++;
        P(H, A, B, C, D, E, F, G, W[i], K[i]);
        i++;
        P(G, H, A, B, C, D, E, F, W[i], K[i]);
        i++;
        P(F, G, H, A, B, C, D, E, W[i], K[i]);
        i++;
        P(E, F, G, H, A, B, C, D, W[i], K[i]);
        i++;
        P(D, E, F, G, H, A, B, C, W[i], K[i]);
        i++;
        P(C, D, E, F, G, H, A, B, W[i], K[i]);
        i++;
        P(B, C, D, E, F, G, H, A, W[i], K[i]);
        i++;
    } while (i < 80);

    ctx->state[0] += A;
    ctx->state[1] += B;
    ctx->state[2] += C;
    ctx->state[3] += D;
    ctx->state[4] += E;
    ctx->state[5] += F;
    ctx->state[6] += G;
    ctx->state[7] += H;

    return (0);
}

#if !defined(MBEDTLS_DEPRECATED_REMOVED)
void mbedtls_sha512_process(mbedtls_sha512_context *ctx, const unsigned char data[128])
{
    mbedtls_internal_sha512_process(ctx, data);
}

#endif
#endif /* !MBEDTLS_SHA512_PROCESS_ALT */

/*
 * SHA-512 context setup
 */
int mbedtls_sha512_starts_ret(mbedtls_sha512_context *ctx, int is384)
{
    SHA512_VALIDATE_RET(ctx != NULL);
    SHA512_VALIDATE_RET(is384 == 0 || is384 == 1);

    int ret;
    sss_algorithm_t alg;
    if (is384)
    {
        alg = kAlgorithm_SSS_SHA384;
    }
    else
    {
        alg = kAlgorithm_SSS_SHA512;
    }
    CRYPTO_InitHardware();
    if (sss_sscp_digest_context_init(&ctx->ctx, &g_sssSession, alg, kMode_SSS_Digest) != kStatus_SSS_Success)
    {
        ret = MBEDTLS_ERR_PLATFORM_HW_ACCEL_FAILED;
    }
    else if (sss_sscp_digest_init(&ctx->ctx) != kStatus_SSS_Success)
    {
        ret = MBEDTLS_ERR_PLATFORM_HW_ACCEL_FAILED;
    }
    else
    {
        ret = 0;
    }
    return ret;
}

#if !defined(MBEDTLS_DEPRECATED_REMOVED)
void mbedtls_sha512_starts(mbedtls_sha512_context *ctx, int is384)
{
    mbedtls_sha512_starts_ret(ctx, is384);
}
#endif

int mbedtls_sha512_update_ret(mbedtls_sha512_context *ctx, const unsigned char *input, size_t ilen)
{
    int ret;
    CRYPTO_InitHardware();
    if (sss_sscp_digest_update(&ctx->ctx, (uint8_t *)input, ilen) != kStatus_SSS_Success)
    {
        ret = MBEDTLS_ERR_PLATFORM_HW_ACCEL_FAILED;
    }
    else
    {
        ret = 0;
    }
    return ret;
}

#if !defined(MBEDTLS_DEPRECATED_REMOVED)
void mbedtls_sha512_update(mbedtls_sha512_context *ctx, const unsigned char *input, size_t ilen)
{
    mbedtls_sha512_update_ret(ctx, input, ilen);
}
#endif

/*
 * SHA-512 final digest
 */
int mbedtls_sha512_finish_ret(mbedtls_sha512_context *ctx, unsigned char output[64])
{
    int ret;
    size_t len = ctx->ctx.digestFullLen;
    CRYPTO_InitHardware();
    if (sss_sscp_digest_finish(&ctx->ctx, output, &len) != kStatus_SSS_Success)
    {
        ret = MBEDTLS_ERR_PLATFORM_HW_ACCEL_FAILED;
    }
    else
    {
        ret = 0;
    }
    sss_sscp_digest_context_free(&ctx->ctx);
    return ret;
}

#if !defined(MBEDTLS_DEPRECATED_REMOVED)
void mbedtls_sha512_finish(mbedtls_sha512_context *ctx, unsigned char output[64])
{
    mbedtls_sha512_finish_ret(ctx, output);
}
#endif

#endif /* MBEDTLS_SHA512_ALT */

#if defined(NXP_MBEDTLS_SHA512_ALT)
/*
 * output = SHA-512( input buffer )
 */
int mbedtls_sha512_ret(const unsigned char *input, size_t ilen, unsigned char output[64], int is384)
{
    sss_sscp_digest_t dctx;
    sss_algorithm_t alg;
    int ret;
    size_t size = 64u;
    if (is384)
    {
        alg = kAlgorithm_SSS_SHA384;
    }
    else
    {
        alg = kAlgorithm_SSS_SHA512;
    }
    if (sss_sscp_digest_context_init(&dctx, &g_sssSession, alg, kMode_SSS_Digest) != kStatus_SSS_Success)
    {
        ret = MBEDTLS_ERR_PLATFORM_HW_ACCEL_FAILED;
    }
    else if (sss_sscp_digest_one_go(&dctx, input, ilen, output, &size) != kStatus_SSS_Success)
    {
        ret = MBEDTLS_ERR_PLATFORM_HW_ACCEL_FAILED;
    }
    else
    {
        ret = 0;
    }
    sss_sscp_digest_context_free(&dctx);
    return ret;
}

#if !defined(MBEDTLS_DEPRECATED_REMOVED)
void mbedtls_sha512(const unsigned char *input, size_t ilen, unsigned char output[64], int is384)
{
    mbedtls_sha512_ret(input, ilen, output, is384);
}
#endif
#endif /* NXP_MBEDTLS_SHA512_ALT */

#endif /* MBEDTLS_SHA512_C */
