/* sha.c

 *

 * Copyright (C) 2006-2026 wolfSSL Inc.

 *

 * This file is part of wolfSSL.

 *

 * wolfSSL is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 3 of the License, or

 * (at your option) any later version.

 *

 * wolfSSL is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA

 */

/*

 * SHA-1 Build Options:

 *

 * Core:

 * NO_SHA:                   Disable SHA-1 support entirely        default: off

 * USE_SLOW_SHA:             Disable SHA-1 loop unrolling          default: off

 * WC_HASH_DATA_ALIGNMENT:   Required data alignment for hashing   default: off

 *

 * Hardware Acceleration (SHA-1-specific):

 * WC_ASYNC_ENABLE_SHA:      Enable async SHA-1 operations         default: off

 * WOLFSSL_PIC32MZ_HASH:     PIC32MZ hardware SHA                  default: off

 * WOLFSSL_PSA_NO_HASH:      Disable PSA hash                      default: off

 * WOLFSSL_TI_HASH:          TI hardware hash                      default: off

 * WOLFSSL_RENESAS_RX64_HASH: Renesas RX64 hardware hash           default: off

 * FREESCALE_LTC_SHA:        Freescale LTC SHA acceleration        default: off

 * FREESCALE_MMCAU_SHA:      Freescale MMCAU SHA acceleration      default: off

 * STM32_HASH:               STM32 hardware hash                   default: off

 * PSOC6_HASH_SHA1:          PSoC6 hardware SHA-1                  default: off

 *

 * AArch64 assembly (WOLFSSL_ARMASM on __aarch64__):

 * WOLFSSL_ARMASM:           Use the AArch64 assembly transforms    default: off

 * WOLFSSL_ARMASM_NO_NEON:   Drop the NEON and crypto-extension

 *                           transforms, leaving only base          default: off

 * WOLFSSL_ARMASM_NO_HW_CRYPTO: Drop the crypto-extension transform default: off

 * WOLFSSL_ARMASM_NO_NEON_IMPL: Drop the NEON transform             default: off

 * WOLFSSL_ARMASM_NO_BASE_IMPL: Drop the base transform             default: off

 * WOLFSSL_ARMASM_INLINE:    Take the transforms from the inline

 *                           assembly twin rather than the .S file  default: off

 */

#define WC_FIPS_LL_CRYPTO

#define _WC_BUILDING_SHA_C

#include <wolfssl/wolfcrypt/libwolfssl_sources.h>

#ifdef DEBUG_WOLFSSL_VERBOSE

    #if defined(WOLFSSL_ESPIDF)

        #include <esp_log.h>

    #endif

#endif

#if !defined(NO_SHA)

#if FIPS_VERSION3_GE(2,0,0)

    #if defined(USE_WINDOWS_API) && defined(_MSC_VER)

        #pragma code_seg(".fipsA$k")

        #pragma const_seg(".fipsB$k")

    #endif

#endif

#include <wolfssl/wolfcrypt/sha.h>

#include <wolfssl/wolfcrypt/hash.h>

#if defined(WOLFSSL_ARMASM) && defined(__aarch64__)

    #include <wolfssl/wolfcrypt/cpuid.h>

#endif

#ifdef WOLF_CRYPTO_CB

    #include <wolfssl/wolfcrypt/cryptocb.h>

#endif

#ifdef WOLFSSL_IMXRT1170_CAAM

#include <wolfssl/wolfcrypt/port/caam/wolfcaam_fsl_nxp.h>

#endif

#if defined(WOLFSSL_PSOC6_CRYPTO)

    #include <wolfssl/wolfcrypt/port/cypress/psoc6_crypto.h>

#endif

/* Assume no hash HW available until supporting HW found. */

#undef WOLFSSL_USE_ESP32_CRYPT_HASH_HW

#if defined(WOLFSSL_ESP32_CRYPT) && \

    !defined(NO_WOLFSSL_ESP32_CRYPT_HASH)

    /* define a single keyword for simplicity & readability

     *

     * by default the HW acceleration is on for ESP32-WROOM32

     * but individual components can be turned off.

     */

    #define WOLFSSL_USE_ESP32_CRYPT_HASH_HW

    #include "wolfssl/wolfcrypt/port/Espressif/esp32-crypt.h"

    /* Although we have hardware acceleration,

    ** we may need to fall back to software */

    #define USE_SHA_SOFTWARE_IMPL

#elif defined(WOLFSSL_USE_ESP32C3_CRYPT_HASH_HW)

    /* The ESP32C3 is different; HW crypto here. Not yet implemented.

    ** We'll be using software for RISC-V at this time */

#else

    #undef WOLFSSL_USE_ESP32_CRYPT_HASH_HW

#endif

#undef WOLFSSL_USE_ESP32_CRYPT_HASH_HW

#if defined(WOLFSSL_ESP32_CRYPT) && \

    !defined(NO_WOLFSSL_ESP32_CRYPT_HASH)

    /* define a single keyword for simplicity & readability

     *

     * by default the HW acceleration is on for ESP32-WROOM32

     * but individual components can be turned off.

     */

    #define WOLFSSL_USE_ESP32_CRYPT_HASH_HW

    #include "wolfssl/wolfcrypt/port/Espressif/esp32-crypt.h"

    /* Although we have hardware acceleration,

    ** we may need to fall back to software */

    #define USE_SHA_SOFTWARE_IMPL

    static const char* TAG = "wc_sha";

#elif defined(WOLFSSL_USE_ESP32C3_CRYPT_HASH_HW)

    /* The ESP32C3 is different; HW crypto here. Not yet implemented.

    ** We'll be using software for RISC-V at this time */

    static const char* TAG = "wc_sha-c3";

#else

    #undef WOLFSSL_USE_ESP32_CRYPT_HASH_HW

#endif

#if defined(WOLFSSL_TI_HASH)

    /* #include <wolfcrypt/src/port/ti/ti-hash.c> included by wc_port.c */

#else

#ifdef NO_INLINE

    #include <wolfssl/wolfcrypt/misc.h>

#else

    #define WOLFSSL_MISC_INCLUDED

    #include <wolfcrypt/src/misc.c>

#endif

#if FIPS_VERSION3_GE(6,0,0)

    const unsigned int wolfCrypt_FIPS_sha_ro_sanity[2] =

                                                     { 0x1a2b3c4d, 0x00000013 };

    int wolfCrypt_FIPS_SHA_sanity(void)

    {

        return 0;

    }

#endif

/* Hardware Acceleration */

#if defined(WOLFSSL_PIC32MZ_HASH)

    #include <wolfssl/wolfcrypt/port/pic32/pic32mz-crypt.h>

#elif defined(STM32_HASH)

    /* Supports CubeMX HAL or Standard Peripheral Library */

    int wc_InitSha_ex(wc_Sha* sha, void* heap, int devId)

    {

        if (sha == NULL) {

            return BAD_FUNC_ARG;

        }

        WC_SILABS_CLEAR_HASH_CTX(sha);

        (void)devId;

        (void)heap;

        wc_Stm32_Hash_Init(&sha->stmCtx);

        return 0;

    }

    int wc_ShaUpdate(wc_Sha* sha, const byte* data, word32 len)

    {

        int ret;

        if (sha == NULL || (data == NULL && len > 0)) {

            return BAD_FUNC_ARG;

        }

        ret = wolfSSL_CryptHwMutexLock();

        if (ret == 0) {

            ret = wc_Stm32_Hash_Update(&sha->stmCtx, HASH_AlgoSelection_SHA1,

                data, len, WC_SHA_BLOCK_SIZE);

            wolfSSL_CryptHwMutexUnLock();

        }

        return ret;

    }

    int wc_ShaFinal(wc_Sha* sha, byte* hash)

    {

        int ret;

        if (sha == NULL || hash == NULL) {

            return BAD_FUNC_ARG;

        }

        ret = wolfSSL_CryptHwMutexLock();

        if (ret == 0) {

            ret = wc_Stm32_Hash_Final(&sha->stmCtx, HASH_AlgoSelection_SHA1,

                hash, WC_SHA_DIGEST_SIZE);

            wolfSSL_CryptHwMutexUnLock();

        }

        (void)wc_InitSha(sha);  /* reset state */

        return ret;

    }

#elif defined(FREESCALE_LTC_SHA)

    #include "fsl_ltc.h"

    int wc_InitSha_ex(wc_Sha* sha, void* heap, int devId)

    {

        if (sha == NULL) {

            return BAD_FUNC_ARG;

        }

        WC_SILABS_CLEAR_HASH_CTX(sha);

        (void)devId;

        (void)heap;

        LTC_HASH_Init(LTC_BASE, &sha->ctx, kLTC_Sha1, NULL, 0);

        return 0;

    }

    int wc_ShaUpdate(wc_Sha* sha, const byte* data, word32 len)

    {

        LTC_HASH_Update(&sha->ctx, data, len);

        return 0;

    }

    int wc_ShaFinal(wc_Sha* sha, byte* hash)

    {

        word32 hashlen = WC_SHA_DIGEST_SIZE;

        LTC_HASH_Finish(&sha->ctx, hash, &hashlen);

        return wc_InitSha(sha);  /* reset state */

    }

#elif defined(FREESCALE_MMCAU_SHA)

    #ifdef FREESCALE_MMCAU_CLASSIC_SHA

        #include "cau_api.h"

    #else

        #include "fsl_mmcau.h"

    #endif

    #define USE_SHA_SOFTWARE_IMPL /* Only for API's, actual transform is here */

    #define XTRANSFORM(S,B)       Transform((S),(B))

    #define XTRANSFORM_LEN(S,B,L) Transform_Len((S),(B),(L))

    #ifndef WC_HASH_DATA_ALIGNMENT

        /* these hardware API's require 4 byte (word32) alignment */

        #define WC_HASH_DATA_ALIGNMENT 4

    #endif

    static int InitSha(wc_Sha* sha)

    {

        int ret = 0;

        ret = wolfSSL_CryptHwMutexLock();

        if (ret != 0) {

            return ret;

        }

    #ifdef FREESCALE_MMCAU_CLASSIC_SHA

        cau_sha1_initialize_output(sha->digest);

    #else

        MMCAU_SHA1_InitializeOutput((word32*)sha->digest);

    #endif

        wolfSSL_CryptHwMutexUnLock();

        sha->buffLen = 0;

        sha->loLen   = 0;

        sha->hiLen   = 0;

        return ret;

    }

    static int Transform(wc_Sha* sha, const byte* data)

    {

        int ret = wolfSSL_CryptHwMutexLock();

        if (ret == 0) {

    #ifdef FREESCALE_MMCAU_CLASSIC_SHA

            cau_sha1_hash_n((byte*)data, 1, sha->digest);

    #else

            MMCAU_SHA1_HashN((byte*)data, 1, (word32*)sha->digest);

    #endif

            wolfSSL_CryptHwMutexUnLock();

        }

        return ret;

    }

    static int Transform_Len(wc_Sha* sha, const byte* data, word32 len)

    {

        int ret = wolfSSL_CryptHwMutexLock();

        if (ret == 0) {

        #if defined(WC_HASH_DATA_ALIGNMENT) && WC_HASH_DATA_ALIGNMENT > 0

            if ((wc_ptr_t)data % WC_HASH_DATA_ALIGNMENT) {

                /* data pointer is NOT aligned,

                 * so copy and perform one block at a time */

                byte* local = (byte*)sha->buffer;

                while (len >= WC_SHA_BLOCK_SIZE) {

                    XMEMCPY(local, data, WC_SHA_BLOCK_SIZE);

                #ifdef FREESCALE_MMCAU_CLASSIC_SHA

                    cau_sha1_hash_n(local, 1, sha->digest);

                #else

                    MMCAU_SHA1_HashN(local, 1, sha->digest);

                #endif

                    data += WC_SHA_BLOCK_SIZE;

                    len  -= WC_SHA_BLOCK_SIZE;

                }

            }

            else

        #endif

            {

    #ifdef FREESCALE_MMCAU_CLASSIC_SHA

            cau_sha1_hash_n((byte*)data, len/WC_SHA_BLOCK_SIZE, sha->digest);

    #else

            MMCAU_SHA1_HashN((byte*)data, len/WC_SHA_BLOCK_SIZE,

                (word32*)sha->digest);

    #endif

            }

            wolfSSL_CryptHwMutexUnLock();

        }

        return ret;

    }

#elif defined(WOLFSSL_IMX6_CAAM) && !defined(NO_IMX6_CAAM_HASH) && \

    !defined(WOLFSSL_QNX_CAAM)

    /* wolfcrypt/src/port/caam/caam_sha.c */

#elif defined(MAX3266X_SHA)

    /* Already brought in by sha.h */

    /* #include <wolfssl/wolfcrypt/port/maxim/max3266x.h> */

#elif defined(WOLFSSL_USE_ESP32_CRYPT_HASH_HW) || \

      defined(WOLFSSL_USE_ESP32C3_CRYPT_HASH_HW)

    /* This function initializes SHA.

    ** This is automatically called by wc_ShaHash */

    static int InitSha(wc_Sha* sha)

    {

        int ret = 0;

        sha->digest[0] = 0x67452301L;

        sha->digest[1] = 0xEFCDAB89L;

        sha->digest[2] = 0x98BADCFEL;

        sha->digest[3] = 0x10325476L;

        sha->digest[4] = 0xC3D2E1F0L;

        sha->buffLen = 0;

        sha->loLen   = 0;

        sha->hiLen   = 0;

        /* HW needs to be carefully initialized, taking into account soft copy.

        ** If already in use; copy may revert to SW as needed. */

        ret = esp_sha_init(&(sha->ctx), WC_HASH_TYPE_SHA);

        return ret;

    }

#elif (defined(WOLFSSL_RENESAS_TSIP_TLS) || \

    defined(WOLFSSL_RENESAS_TSIP_CRYPTONLY)) && \

    !defined(NO_WOLFSSL_RENESAS_TSIP_CRYPT_HASH)

    /* implemented in wolfcrypt/src/port/Renesas/renesas_tsip_sha.c */

#elif defined(WOLFSSL_RENESAS_RSIP) && \

     !defined(NO_WOLFSSL_RENESAS_FSPSM_HASH)

    /* implemented in wolfcrypt/src/port/Renesas/renesas_fspsm_sha.c */

#elif defined(WOLFSSL_IMXRT_DCP)

    #include <wolfssl/wolfcrypt/port/nxp/dcp_port.h>

    /* implemented in wolfcrypt/src/port/nxp/dcp_port.c */

#elif defined(WOLFSSL_NXP_HASHCRYPT_SHA)

    /* implemented in wolfcrypt/src/port/nxp/hashcrypt_port.c */

#elif defined(WOLFSSL_SILABS_SE_ACCEL)

    /* implemented in wolfcrypt/src/port/silabs/silabs_hash.c */

#elif defined(WOLFSSL_RENESAS_RX64_HASH)

/* implemented in wolfcrypt/src/port/Renesas/renesas_rx64_hw_sha.c */

#elif defined(WOLFSSL_SE050) && defined(WOLFSSL_SE050_HASH)

    #include <wolfssl/wolfcrypt/port/nxp/se050_port.h>

    int wc_InitSha_ex(wc_Sha* sha, void* heap, int devId)

    {

        if (sha == NULL) {

            return BAD_FUNC_ARG;

        }

        WC_SILABS_CLEAR_HASH_CTX(sha);

        (void)devId;

        return se050_hash_init(&sha->se050Ctx, heap);

    }

    int wc_ShaUpdate(wc_Sha* sha, const byte* data, word32 len)

    {

        return se050_hash_update(&sha->se050Ctx, data, len);

    }

    int wc_ShaFinal(wc_Sha* sha, byte* hash)

    {

        int ret = 0;

        ret = se050_hash_final(&sha->se050Ctx, hash, WC_SHA_DIGEST_SIZE,

                               kAlgorithm_SSS_SHA1);

        return ret;

    }

    int wc_ShaFinalRaw(wc_Sha* sha, byte* hash)

    {

        int ret = 0;

        ret = se050_hash_final(&sha->se050Ctx, hash, WC_SHA_DIGEST_SIZE,

                               kAlgorithm_SSS_SHA1);

        return ret;

    }

#elif defined(WOLFSSL_HAVE_PSA) && !defined(WOLFSSL_PSA_NO_HASH)

/* implemented in wolfcrypt/src/port/psa/psa_hash.c */

#elif defined(PSOC6_HASH_SHA1)

    /* Implemented in wolfcrypt/src/port/cypress/psoc6_crypto.c */

#else

    /* Software implementation */

    #define USE_SHA_SOFTWARE_IMPL

    static int InitSha(wc_Sha* sha)

    {

        int ret = 0;

        sha->digest[0] = 0x67452301L;

        sha->digest[1] = 0xEFCDAB89L;

        sha->digest[2] = 0x98BADCFEL;

        sha->digest[3] = 0x10325476L;

        sha->digest[4] = 0xC3D2E1F0L;

        sha->buffLen = 0;

        XMEMSET(sha->buffer, 0, sizeof(sha->buffer));

        sha->loLen   = 0;

        sha->hiLen   = 0;

    #ifdef WOLFSSL_HASH_FLAGS

        sha->flags = 0;

    #endif

        return ret;

    }

#endif /* End Hardware Acceleration */

/* Software implementation */

#ifdef USE_SHA_SOFTWARE_IMPL

static WC_INLINE void AddLength(wc_Sha* sha, word32 len)

{

    word32 tmp = sha->loLen;

    if ((sha->loLen += len) < tmp)

        sha->hiLen++;                       /* carry low to high */

}

/* AArch64 assembly block transforms - wolfcrypt/src/port/arm/armv8-sha1-asm.S,

 * or its inline assembly twin armv8-sha1-asm_c.c.  Reached only when the

 * hardware-acceleration chain above selected the software API bodies and did

 * not install a transform of its own.

 *

 * Three implementations are built and the best one the CPU supports is chosen

 * on wc_InitSha_ex():

 *   crypto - the Armv8 crypto extension (sha1c/sha1p/sha1m/sha1h/sha1su*)

 *   neon   - rounds in general-purpose registers, message schedule in NEON

 *   base   - general-purpose registers only

 * and Transform() below is the last resort if none of them is usable.

 *

 * The choice follows the CPU id, so cpuid_select_flags() reaches the

 * implementations this CPU would not otherwise pick - clearing CPUID_SHA1

 * leaves neon, clearing CPUID_ASIMD as well leaves base.  That is how

 * sha_armasm_variant_test() in wolfcrypt/test/test.c checks all three on one

 * machine, whichever the CPU would have chosen.  Call it

 * before wc_InitSha_ex(), not part way through a hash: the selection is read

 * again on each init.

 *

 * Little-endian only.  Every one of the three loads the message with rev/rev32,

 * which is what makes a little-endian host read the stream big-endian; on a

 * big-endian host the plain loads are already right and the reversal would

 * corrupt them.  So a big-endian build does not take this arm and uses the

 * software path, unchanged. */

#if !defined(XTRANSFORM) && defined(WOLFSSL_ARMASM) && defined(__aarch64__) && \

    defined(LITTLE_ENDIAN_ORDER)

/* The assembly loads the message with rev32, so it consumes the raw big-endian

 * byte stream: wc_ShaUpdate()/wc_ShaFinal() must not byte-reverse sha->buffer

 * before handing a block over, and must instead put the trailing length words

 * into the stream big-endian.  See the uses of this macro below. */

#define WOLFSSL_ARMASM_SHA_TRANSFORM

/* Build Transform() even though XTRANSFORM is defined here - it is the

 * fallback when the CPU has no usable SIMD. */

#define NEED_SOFT_SHA

static int Transform(wc_Sha* sha, const byte* data);

static int Transform_Sha_Len(wc_Sha* sha, const byte* data, word32 len);

/* Which block transform the CPU id selected.

 *

 * An atomic holding a small enumerator rather than a function pointer.  Three

 * reasons.  The store is not a one-time init that could be argued benign:

 * cpuid_select_flags() is public, so the id - and with it the selection - can

 * change at any point in the process's life, and Sha_SetTransform() redoes it

 * on every wc_InitSha_ex().  Concurrent stores are idempotent, every caller

 * computing the same value from the same flags, but identical values do not

 * make a non-atomic store race-free in C.  And an enumerator plus direct calls

 * keeps mutable global function-pointer state out of the picture entirely.

 * sha512.c does the same for its PPC64 dispatch. */

enum {

    WC_SHA_TRANSFORM_C = 0,

    WC_SHA_TRANSFORM_BASE,

    WC_SHA_TRANSFORM_NEON,

    WC_SHA_TRANSFORM_CRYPTO

};

/* The C fallback until a selection is published, so it is always valid. */

static wolfSSL_Atomic_Uint sha_transform =

    WOLFSSL_ATOMIC_INITIALIZER(WC_SHA_TRANSFORM_C);

/* The crypto and NEON transforms work in the vector register file, so a kernel

 * module has to bracket them.  (They touch none of the callee-saved v8-v15 -

 * see vector_regs_no_stack() in the generator - but that only spares them a

 * prologue; the registers still belong to whoever was interrupted.)  The base

 * transform and the C fallback use general-purpose registers only. */

#ifdef WOLFSSL_USE_SAVE_VECTOR_REGISTERS

    #define WC_SHA_ARM64_SVR_BEGIN()                                        \

        do { int _svr_ret = SAVE_VECTOR_REGISTERS2();                       \

             if (_svr_ret != 0) return _svr_ret; } while (0)

    #define WC_SHA_ARM64_SVR_END()  RESTORE_VECTOR_REGISTERS()

#else

    #define WC_SHA_ARM64_SVR_BEGIN() WC_DO_NOTHING

    #define WC_SHA_ARM64_SVR_END()   WC_DO_NOTHING

#endif

/* The assembly entry points return nothing and cannot fail - wrap them so that

 * they all have the one type the dispatcher calls through. */

#if !defined(WOLFSSL_ARMASM_NO_NEON)

#if !defined(WOLFSSL_ARMASM_NO_HW_CRYPTO)

static int Transform_Sha_Len_crypto_aarch64(wc_Sha* sha, const byte* data,

    word32 len)

{

    WC_SHA_ARM64_SVR_BEGIN();

    Transform_Sha_Len_crypto(sha, data, len);

    WC_SHA_ARM64_SVR_END();

    return 0;

}

#endif

#if !defined(WOLFSSL_ARMASM_NO_NEON_IMPL) || \

    defined(WOLFSSL_ARMASM_NO_HW_CRYPTO)

static int Transform_Sha_Len_neon_aarch64(wc_Sha* sha, const byte* data,

    word32 len)

{

    WC_SHA_ARM64_SVR_BEGIN();

    Transform_Sha_Len_neon(sha, data, len);

    WC_SHA_ARM64_SVR_END();

    return 0;

}

#endif

#endif

#if !defined(WOLFSSL_ARMASM_NO_BASE_IMPL) || defined(WOLFSSL_ARMASM_NO_NEON)

static int Transform_Sha_Len_base_aarch64(wc_Sha* sha, const byte* data,

    word32 len)

{

    Transform_Sha_Len_base(sha, data, len);

    return 0;

}

#endif

/* Fallback for a CPU none of the assembly implementations can run on.

 * Transform() takes a block already reversed into big-endian words, so the

 * reversal the update and final paths skipped happens here. */

static int Transform_Sha_Len(wc_Sha* sha, const byte* data, word32 len)

{

    int ret = 0;

    while (len >= WC_SHA_BLOCK_SIZE) {

        word32 buffer[WC_SHA_BLOCK_SIZE / sizeof(word32)];

        XMEMCPY(buffer, data, WC_SHA_BLOCK_SIZE);

    #ifdef LITTLE_ENDIAN_ORDER

        ByteReverseWords(buffer, buffer, WC_SHA_BLOCK_SIZE);

    #endif

        ret = Transform(sha, (const byte*)buffer);

        if (ret != 0)

            break;

        data += WC_SHA_BLOCK_SIZE;

        len  -= WC_SHA_BLOCK_SIZE;

    }

    return ret;

}

/* Call the selected transform.  One atomic read, then a direct call. */

static WC_INLINE int Transform_Sha_Len_aarch64(wc_Sha* sha, const byte* data,

    word32 len)

{

    switch (WOLFSSL_ATOMIC_LOAD(sha_transform)) {

#if !defined(WOLFSSL_ARMASM_NO_NEON)

#if !defined(WOLFSSL_ARMASM_NO_HW_CRYPTO)

    case WC_SHA_TRANSFORM_CRYPTO:

        return Transform_Sha_Len_crypto_aarch64(sha, data, len);

#endif

#if !defined(WOLFSSL_ARMASM_NO_NEON_IMPL) || \

    defined(WOLFSSL_ARMASM_NO_HW_CRYPTO)

    case WC_SHA_TRANSFORM_NEON:

        return Transform_Sha_Len_neon_aarch64(sha, data, len);

#endif

#endif

#if !defined(WOLFSSL_ARMASM_NO_BASE_IMPL) || defined(WOLFSSL_ARMASM_NO_NEON)

    case WC_SHA_TRANSFORM_BASE:

        return Transform_Sha_Len_base_aarch64(sha, data, len);

#endif

    default:

        return Transform_Sha_Len(sha, data, len);

    }

}

static WC_INLINE int Transform_Sha_aarch64(wc_Sha* sha, const byte* data)

{

    return Transform_Sha_Len_aarch64(sha, data, WC_SHA_BLOCK_SIZE);

}

/* Publish the transform for the CPU features currently selected.

 *

 * Recomputed on every init rather than cached against the id it was made from:

 * the id is a handful of bit tests and init is not a hot path, and it leaves one

 * piece of shared state instead of two that could be read out of step with each

 * other.  Changing the selection part way through a hash is still the one thing

 * that is not safe, because wc_ShaTransform() byte-swaps or not according to

 * which implementation is selected. */

static void Sha_SetTransform(void)

{

    cpuid_flags_t cpuid_flags = cpuid_get_flags();

    unsigned int transform;

#if !defined(WOLFSSL_ARMASM_NO_NEON)

#if !defined(WOLFSSL_ARMASM_NO_HW_CRYPTO)

    if (IS_AARCH64_SHA1(cpuid_flags)) {

        transform = WC_SHA_TRANSFORM_CRYPTO;

    }

    else

#endif

#if !defined(WOLFSSL_ARMASM_NO_NEON_IMPL) || \

    defined(WOLFSSL_ARMASM_NO_HW_CRYPTO)

    if (IS_AARCH64_ASIMD(cpuid_flags)) {

        transform = WC_SHA_TRANSFORM_NEON;

    }

    else

#endif

#endif

#if !defined(WOLFSSL_ARMASM_NO_BASE_IMPL) || defined(WOLFSSL_ARMASM_NO_NEON)

    {

        transform = WC_SHA_TRANSFORM_BASE;

    }

#else

    {

        transform = WC_SHA_TRANSFORM_C;

    }

#endif

    WOLFSSL_ATOMIC_STORE(sha_transform, transform);

    (void)cpuid_flags;

}

#define XTRANSFORM      Transform_Sha_aarch64

#define XTRANSFORM_LEN  Transform_Sha_Len_aarch64

#endif /* !XTRANSFORM && WOLFSSL_ARMASM && __aarch64__ */

/* Check if custom wc_Sha transform is used.  A backend that supplies its own

 * XTRANSFORM can still ask for Transform() to be built - as the AArch64

 * assembly does, to fall back on when the CPU has no usable SIMD - by defining

 * NEED_SOFT_SHA. */

#if !defined(XTRANSFORM) || defined(NEED_SOFT_SHA)

    #ifndef XTRANSFORM

        #define XTRANSFORM(S,B)   Transform((S),(B))

    #endif

    #define blk0(i) (W[i] = *((const word32*)&data[(i)*sizeof(word32)]))

    #define blk1(i) (W[(i)&15] = \

        rotlFixed(W[((i)+13)&15]^W[((i)+8)&15]^W[((i)+2)&15]^W[(i)&15],1))

    #define f1(x,y,z) ((z)^((x) &((y)^(z))))

    #define f2(x,y,z) ((x)^(y)^(z))

    #define f3(x,y,z) (((x)&(y))|((z)&((x)|(y))))

    #define f4(x,y,z) ((x)^(y)^(z))

    #if defined(WOLFSSL_NUCLEUS_1_2) || defined(NUCLEUS_PLUS_2_3)

        /* nucleus.h also defines R1-R4 */

        #undef R1

        #undef R2

        #undef R3

        #undef R4

    #endif

    /* (R0+R1), R2, R3, R4 are the different operations used in SHA1 */

    #define R0(v,w,x,y,z,i) (z)+= f1((w),(x),(y)) + blk0((i)) + 0x5A827999+ \

        rotlFixed((v),5); (w) = rotlFixed((w),30);

    #define R1(v,w,x,y,z,i) (z)+= f1((w),(x),(y)) + blk1((i)) + 0x5A827999+ \

        rotlFixed((v),5); (w) = rotlFixed((w),30);

    #define R2(v,w,x,y,z,i) (z)+= f2((w),(x),(y)) + blk1((i)) + 0x6ED9EBA1+ \

        rotlFixed((v),5); (w) = rotlFixed((w),30);

    #define R3(v,w,x,y,z,i) (z)+= f3((w),(x),(y)) + blk1((i)) + 0x8F1BBCDC+ \

        rotlFixed((v),5); (w) = rotlFixed((w),30);

    #define R4(v,w,x,y,z,i) (z)+= f4((w),(x),(y)) + blk1((i)) + 0xCA62C1D6+ \

        rotlFixed((v),5); (w) = rotlFixed((w),30);

    static int Transform(wc_Sha* sha, const byte* data)

    {

        word32 W[WC_SHA_BLOCK_SIZE / sizeof(word32)];

        /* Copy context->state[] to working vars */

        word32 a = sha->digest[0];

        word32 b = sha->digest[1];

        word32 c = sha->digest[2];

        word32 d = sha->digest[3];

        word32 e = sha->digest[4];

    #ifdef USE_SLOW_SHA

        word32 t, i;

    #ifdef WOLFSSL_CHECK_MEM_ZERO

        /* Zero first: the registration call takes const void*, and a pointer

         * to an uninitialized object trips -Wmaybe-uninitialized under

         * -Werror. */

        XMEMSET(W, 0, sizeof(W));

        wc_MemZero_Add("Sha Transform W", W, sizeof(W));

    #endif

        for (i = 0; i < 16; i++) {

            R0(a, b, c, d, e, i);

            t = e; e = d; d = c; c = b; b = a; a = t;

        }

        for (; i < 20; i++) {

            R1(a, b, c, d, e, i);

            t = e; e = d; d = c; c = b; b = a; a = t;

        }

        for (; i < 40; i++) {

            R2(a, b, c, d, e, i);

            t = e; e = d; d = c; c = b; b = a; a = t;

        }

        for (; i < 60; i++) {

            R3(a, b, c, d, e, i);

            t = e; e = d; d = c; c = b; b = a; a = t;

        }

        for (; i < 80; i++) {

            R4(a, b, c, d, e, i);

            t = e; e = d; d = c; c = b; b = a; a = t;

        }

    #else

        /* nearly 1 K bigger in code size but 25% faster */

        /* 4 rounds of 20 operations each. Loop unrolled. */

    #ifdef WOLFSSL_CHECK_MEM_ZERO

        /* Zero first: the registration call takes const void*, and a pointer

         * to an uninitialized object trips -Wmaybe-uninitialized under

         * -Werror. */

        XMEMSET(W, 0, sizeof(W));

        wc_MemZero_Add("Sha Transform W", W, sizeof(W));

    #endif

        R0(a,b,c,d,e, 0); R0(e,a,b,c,d, 1); R0(d,e,a,b,c, 2); R0(c,d,e,a,b, 3);

        R0(b,c,d,e,a, 4); R0(a,b,c,d,e, 5); R0(e,a,b,c,d, 6); R0(d,e,a,b,c, 7);

        R0(c,d,e,a,b, 8); R0(b,c,d,e,a, 9); R0(a,b,c,d,e,10); R0(e,a,b,c,d,11);

        R0(d,e,a,b,c,12); R0(c,d,e,a,b,13); R0(b,c,d,e,a,14); R0(a,b,c,d,e,15);

        R1(e,a,b,c,d,16); R1(d,e,a,b,c,17); R1(c,d,e,a,b,18); R1(b,c,d,e,a,19);

        R2(a,b,c,d,e,20); R2(e,a,b,c,d,21); R2(d,e,a,b,c,22); R2(c,d,e,a,b,23);

        R2(b,c,d,e,a,24); R2(a,b,c,d,e,25); R2(e,a,b,c,d,26); R2(d,e,a,b,c,27);

        R2(c,d,e,a,b,28); R2(b,c,d,e,a,29); R2(a,b,c,d,e,30); R2(e,a,b,c,d,31);

        R2(d,e,a,b,c,32); R2(c,d,e,a,b,33); R2(b,c,d,e,a,34); R2(a,b,c,d,e,35);

        R2(e,a,b,c,d,36); R2(d,e,a,b,c,37); R2(c,d,e,a,b,38); R2(b,c,d,e,a,39);

        R3(a,b,c,d,e,40); R3(e,a,b,c,d,41); R3(d,e,a,b,c,42); R3(c,d,e,a,b,43);

        R3(b,c,d,e,a,44); R3(a,b,c,d,e,45); R3(e,a,b,c,d,46); R3(d,e,a,b,c,47);

        R3(c,d,e,a,b,48); R3(b,c,d,e,a,49); R3(a,b,c,d,e,50); R3(e,a,b,c,d,51);

        R3(d,e,a,b,c,52); R3(c,d,e,a,b,53); R3(b,c,d,e,a,54); R3(a,b,c,d,e,55);

        R3(e,a,b,c,d,56); R3(d,e,a,b,c,57); R3(c,d,e,a,b,58); R3(b,c,d,e,a,59);

        R4(a,b,c,d,e,60); R4(e,a,b,c,d,61); R4(d,e,a,b,c,62); R4(c,d,e,a,b,63);

        R4(b,c,d,e,a,64); R4(a,b,c,d,e,65); R4(e,a,b,c,d,66); R4(d,e,a,b,c,67);

        R4(c,d,e,a,b,68); R4(b,c,d,e,a,69); R4(a,b,c,d,e,70); R4(e,a,b,c,d,71);

        R4(d,e,a,b,c,72); R4(c,d,e,a,b,73); R4(b,c,d,e,a,74); R4(a,b,c,d,e,75);

        R4(e,a,b,c,d,76); R4(d,e,a,b,c,77); R4(c,d,e,a,b,78); R4(b,c,d,e,a,79);

    #endif

        /* Add the working vars back into digest state[] */

        sha->digest[0] += a;

        sha->digest[1] += b;

        sha->digest[2] += c;

        sha->digest[3] += d;

        sha->digest[4] += e;

        (void)data; /* Not used */

        ForceZero(W, sizeof(W));

    #ifdef WOLFSSL_CHECK_MEM_ZERO

        wc_MemZero_Check(W, sizeof(W));

    #endif

        return 0;

    }

#endif /* !XTRANSFORM || NEED_SOFT_SHA, when USE_SHA_SOFTWARE_IMPL */

/*

** wolfCrypt InitSha external wrapper.

**

** we'll assume this is ALWAYS for a new, uninitialized sha

*/

int wc_InitSha_ex(wc_Sha* sha, void* heap, int devId)

{

    int ret = 0;

    if (sha == NULL) {

        return BAD_FUNC_ARG;

    }

    WC_SILABS_CLEAR_HASH_CTX(sha);

#ifdef WOLFSSL_ARMASM_SHA_TRANSFORM

    Sha_SetTransform();

#endif

    sha->heap = heap;

#ifdef WOLF_CRYPTO_CB

    sha->devId = devId;

    sha->devCtx = NULL;

#endif

#ifdef WOLFSSL_HASH_KEEP

    sha->msg  = NULL;

    sha->len  = 0;

    sha->used = 0;

#endif

#ifdef WOLFSSL_USE_ESP32_CRYPT_HASH_HW

    if (sha->ctx.mode != ESP32_SHA_INIT) {

        /* it may be interesting to see old values during debugging */

        ESP_LOGV(TAG, "Set ctx mode from prior value: %d", sha->ctx.mode);

    }

    /* We know this is a fresh, uninitialized item, so set to INIT */

    sha->ctx.mode = ESP32_SHA_INIT;

#endif

    ret = InitSha(sha);

    if (ret != 0) {

        return ret;

    }

#if defined(WOLFSSL_ASYNC_CRYPT) && defined(WC_ASYNC_ENABLE_SHA)

    ret = wolfAsync_DevCtxInit(&sha->asyncDev, WOLFSSL_ASYNC_MARKER_SHA,

                                                            sha->heap, devId);

#else

    (void)devId;

#endif /* WOLFSSL_ASYNC_CRYPT */

#ifdef WOLFSSL_IMXRT1170_CAAM

   ret = wc_CAAM_HashInit(&sha->hndl, &sha->ctx, WC_HASH_TYPE_SHA);

#endif

    return ret;

} /* wc_InitSha_ex */

/* do block size increments/updates */

int wc_ShaUpdate(wc_Sha* sha, const byte* data, word32 len)

{

    int ret = 0;

    word32 blocksLen;

    byte* local;

    if (sha == NULL) {

        return BAD_FUNC_ARG;

    }

    if (data == NULL && len == 0) {

        /* valid, but do nothing */

        return 0;

    }

    if (data == NULL) {

        return BAD_FUNC_ARG;

    }

#ifdef WOLF_CRYPTO_CB

    if (sha->devId != INVALID_DEVID) {

        ret = wc_CryptoCb_ShaHash(sha, data, len, NULL);

        if (ret != WC_NO_ERR_TRACE(CRYPTOCB_UNAVAILABLE))

            return ret;

        ret = 0; /* reset ret */

        /* fall-through when unavailable */

    }

#endif

#if defined(WOLFSSL_ASYNC_CRYPT) && defined(WC_ASYNC_ENABLE_SHA)

    if (sha->asyncDev.marker == WOLFSSL_ASYNC_MARKER_SHA) {

    #if defined(HAVE_INTEL_QA)

        return IntelQaSymSha(&sha->asyncDev, NULL, data, len);

    #endif

    }

#endif /* WOLFSSL_ASYNC_CRYPT */

    /* check that internal buffLen is valid */

    if (sha->buffLen >= WC_SHA_BLOCK_SIZE) {

        return BUFFER_E;

    }

    /* add length for final */

    AddLength(sha, len);

    local = (byte*)sha->buffer;

    /* process any remainder from previous operation */

    if (sha->buffLen > 0) {

        blocksLen = min(len, WC_SHA_BLOCK_SIZE - sha->buffLen);

        XMEMCPY(&local[sha->buffLen], data, blocksLen);

        sha->buffLen += blocksLen;

        data         += blocksLen;

        len          -= blocksLen;

        if (sha->buffLen == WC_SHA_BLOCK_SIZE) {

        #if defined(WOLFSSL_USE_ESP32_CRYPT_HASH_HW)

            if (sha->ctx.mode == ESP32_SHA_INIT) {

                #if defined(WOLFSSL_DEBUG_MUTEX)

                {

                    ESP_LOGI(TAG, "wc_ShaUpdate try hardware");

                }

                #endif

                esp_sha_try_hw_lock(&sha->ctx);

            }

        #endif

        #if defined(LITTLE_ENDIAN_ORDER) && !defined(FREESCALE_MMCAU_SHA) && \

            !defined(WOLFSSL_ARMASM_SHA_TRANSFORM)

            #if ( defined(CONFIG_IDF_TARGET_ESP32C2) || \

                  defined(CONFIG_IDF_TARGET_ESP8684) || \

                  defined(CONFIG_IDF_TARGET_ESP32C3) || \

                  defined(CONFIG_IDF_TARGET_ESP32C6)    \

                ) && \

                 defined(WOLFSSL_ESP32_CRYPT) && \

                !defined(NO_WOLFSSL_ESP32_CRYPT_HASH)

                /* For Espressif RISC-V Targets, we *may* need to reverse bytes

                 * depending on if HW is active or not. */

                if (esp_sha_need_byte_reversal(&sha->ctx))

            #endif

            {

            #ifdef WOLFSSL_WIDE_BYTE

                /* CHAR_BIT != 8: pack the 16 big-endian schedule words

                 * octet-wise rather than reversing whole cells. */

                WordsFromBytesBE32(sha->buffer, (const byte*)sha->buffer,

                    WC_SHA_BLOCK_SIZE / 4);

            #else

                ByteReverseWords(sha->buffer, sha->buffer, WC_SHA_BLOCK_SIZE);

            #endif

            }

        #endif

        #if defined(WOLFSSL_USE_ESP32_CRYPT_HASH_HW)

            if (sha->ctx.mode == ESP32_SHA_SW) {

                #if defined(WOLFSSL_DEBUG_MUTEX)

                {

                    ESP_LOGI(TAG, "wc_ShaUpdate process software");

                }

                #endif

                ret = XTRANSFORM(sha, (const byte*)local);

            }

            else {

                #if defined(WOLFSSL_DEBUG_MUTEX)

                {

                    ESP_LOGI(TAG, "wc_ShaUpdate process hardware");

                }

                #endif

                esp_sha_process(sha, (const byte*)local);

            }

        #elif defined (WOLFSSL_USE_ESP32C3_CRYPT_HASH_HW)

            ESP_LOGI(TAG, "wc_ShaUpdate not implemented for ESP32C3");

            ret = XTRANSFORM(sha, (const byte*)local);

        #else

            ret = XTRANSFORM(sha, (const byte*)local);

        #endif

            if (ret != 0) {

                return ret;

            }

            sha->buffLen = 0; /* Nothing left to do, so set to zero. */

        } /* (sha->buffLen == WC_SHA_BLOCK_SIZE) */

    } /* (sha->buffLen > 0)  Process any remainder from previous operation. */

    /* process blocks */

#ifdef XTRANSFORM_LEN

    /* get number of blocks */

    /* 64-1 = 0x3F (~ Inverted = 0xFFFFFFC0) */

    /* len (masked by 0xFFFFFFC0) returns block aligned length */

    blocksLen = len & ~(WC_SHA_BLOCK_SIZE-1);

    if (blocksLen > 0) {

        /* Byte reversal performed in function if required. */

        ret = XTRANSFORM_LEN(sha, data, blocksLen);

        if (ret != 0) {

            return ret;

        }

        data += blocksLen;

        len  -= blocksLen;

    }

#else

    while (len >= WC_SHA_BLOCK_SIZE) {

        word32* local32 = sha->buffer;

        /* optimization to avoid memcpy if data pointer is properly aligned */

        /* Little Endian requires byte swap, so can't use data directly */

    #if defined(WC_HASH_DATA_ALIGNMENT) && !defined(LITTLE_ENDIAN_ORDER)

        if (((wc_ptr_t)data % WC_HASH_DATA_ALIGNMENT) == 0) {

            local32 = (word32*)data;

        }

        else

    #endif

        {

            XMEMCPY(local32, data, WC_SHA_BLOCK_SIZE);

        }

        data += WC_SHA_BLOCK_SIZE;

        len  -= WC_SHA_BLOCK_SIZE;

    #if defined(WOLFSSL_USE_ESP32_CRYPT_HASH_HW)

        if (sha->ctx.mode == ESP32_SHA_INIT){

            esp_sha_try_hw_lock(&sha->ctx);

        }

    #endif

    #if defined(LITTLE_ENDIAN_ORDER) && !defined(FREESCALE_MMCAU_SHA) && \

        !defined(WOLFSSL_ARMASM_SHA_TRANSFORM)

        #if ( defined(CONFIG_IDF_TARGET_ESP32C2) || \

              defined(CONFIG_IDF_TARGET_ESP8684) || \

              defined(CONFIG_IDF_TARGET_ESP32C3) || \

              defined(CONFIG_IDF_TARGET_ESP32C6)    \

            ) && \

             defined(WOLFSSL_ESP32_CRYPT) && \

            !defined(NO_WOLFSSL_ESP32_CRYPT_HASH)

            /* For Espressif RISC-V Targets, we *may* need to reverse bytes

             * depending on if HW is active or not. */

            if (esp_sha_need_byte_reversal(&sha->ctx))

        #endif

        {

        #ifdef WOLFSSL_WIDE_BYTE

            WordsFromBytesBE32(local32, (const byte*)local32,

                WC_SHA_BLOCK_SIZE / 4);

        #else

            ByteReverseWords(local32, local32, WC_SHA_BLOCK_SIZE);

        #endif

        }

    #endif

    #if defined(WOLFSSL_USE_ESP32_CRYPT_HASH_HW)

        if (sha->ctx.mode == ESP32_SHA_SW){

            ret = XTRANSFORM(sha, (const byte*)local32);

        }

        else {

            esp_sha_process(sha, (const byte*)local32);

        }

    #else

        ret = XTRANSFORM(sha, (const byte*)local32);

    #endif

    }

#endif /* XTRANSFORM_LEN */

    /* save remainder */

    if (len > 0) {

        XMEMCPY(local, data, len);

        sha->buffLen = len;

    }

    return ret;

}

int wc_ShaFinalRaw(wc_Sha* sha, byte* hash)

{

#if defined(LITTLE_ENDIAN_ORDER) && !defined(WOLFSSL_WIDE_BYTE)

    word32 digest[WC_SHA_DIGEST_SIZE / sizeof(word32)];

    XMEMSET(digest, 0, sizeof(digest));

#endif

    if (sha == NULL || hash == NULL) {

        return BAD_FUNC_ARG;

    }

#if defined(WOLFSSL_CHECK_MEM_ZERO) && defined(LITTLE_ENDIAN_ORDER) && \

    !defined(WOLFSSL_WIDE_BYTE)

    wc_MemZero_Add("wc_ShaFinalRaw digest", digest, sizeof(digest));

#endif

#if defined(WOLFSSL_WIDE_BYTE)

    /* CHAR_BIT != 8: write the digest words as big-endian octets. */

    BytesFromWordsBE32(hash, sha->digest, WC_SHA_DIGEST_SIZE);

#elif defined(LITTLE_ENDIAN_ORDER)

    #if ( defined(CONFIG_IDF_TARGET_ESP32C2) || \

          defined(CONFIG_IDF_TARGET_ESP8684) || \

          defined(CONFIG_IDF_TARGET_ESP32C3) || \

          defined(CONFIG_IDF_TARGET_ESP32C6)    \

        ) && \

         defined(WOLFSSL_ESP32_CRYPT) && \

        !defined(NO_WOLFSSL_ESP32_CRYPT_HASH)