/* hash.h
 *
 * 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
 */

/*!
    \file wolfssl/wolfcrypt/hash.h
*/

#ifndef WOLF_CRYPT_HASH_H
#define WOLF_CRYPT_HASH_H

#include <wolfssl/wolfcrypt/types.h>

#ifndef NO_MD5
    #include <wolfssl/wolfcrypt/md5.h>
#endif
#ifndef NO_SHA
    #include <wolfssl/wolfcrypt/sha.h>
#endif
#if defined(WOLFSSL_SHA224) || !defined(NO_SHA256)
    #include <wolfssl/wolfcrypt/sha256.h>
#endif
#if defined(WOLFSSL_SHA384) || defined(WOLFSSL_SHA512)
    #include <wolfssl/wolfcrypt/sha512.h>
#endif
#if defined(HAVE_BLAKE2B) || defined(HAVE_BLAKE2S)
    #include <wolfssl/wolfcrypt/blake2.h>
#endif
#ifdef WOLFSSL_SHA3
    #include <wolfssl/wolfcrypt/sha3.h>
#endif
#ifndef NO_MD4
    #include <wolfssl/wolfcrypt/md4.h>
#endif
#ifdef WOLFSSL_MD2
    #include <wolfssl/wolfcrypt/md2.h>
#endif
#ifdef WOLFSSL_SM3
    #include <wolfssl/wolfcrypt/sm3.h>
#endif


#ifdef __cplusplus
    extern "C" {
#endif

#if !defined(HAVE_FIPS) && !defined(NO_OLD_WC_NAMES)
    #define MAX_DIGEST_SIZE WC_MAX_DIGEST_SIZE
#endif


/* Supported Message Authentication Codes from page 43 */
enum wc_MACAlgorithm {
    no_mac,
    md5_mac,
    sha_mac,
    sha224_mac,
    sha256_mac,     /* needs to match external KDF_MacAlgorithm */
    sha384_mac,
    sha512_mac,
    rmd_mac,
    blake2b_mac,
    sm3_mac
};

/* hash union */
typedef union {
#ifndef NO_MD5
    wc_Md5 md5;
#endif
#ifndef NO_SHA
    wc_Sha sha;
#endif
#ifdef WOLFSSL_SHA224
    wc_Sha224 sha224;
#endif
#ifndef NO_SHA256
    wc_Sha256 sha256;
#endif
#ifdef WOLFSSL_SHA384
    wc_Sha384 sha384;
#endif
#ifdef WOLFSSL_SHA512
    wc_Sha512 sha512;
#endif
#ifdef WOLFSSL_SHA3
    wc_Sha3 sha3;
#endif
#ifdef WOLFSSL_SM3
    wc_Sm3 sm3;
#endif
    WOLF_AGG_DUMMY_MEMBER;
} wc_Hashes;

#ifndef NO_HASH_WRAPPER
typedef struct {
    wc_Hashes alg;
    enum wc_HashType type; /* sanity check */
#ifndef WC_NO_CONSTRUCTORS
    void *heap;
#endif
} wc_HashAlg;
#endif /* !NO_HASH_WRAPPER */


/* Find largest possible digest size
   Note if this gets up to the size of 80 or over check smallstack build */
#undef WC_MAX_DIGEST_SIZE
#undef WC_MAX_BLOCK_SIZE
#if defined(WOLFSSL_SHA3)
    /* note: SHA3-224 has the largest block size */
    #define WC_MAX_DIGEST_SIZE WC_SHA3_512_DIGEST_SIZE
    #define WC_MAX_BLOCK_SIZE  WC_SHA3_224_BLOCK_SIZE
#elif defined(WOLFSSL_SHA512)
    #define WC_MAX_DIGEST_SIZE WC_SHA512_DIGEST_SIZE
    #define WC_MAX_BLOCK_SIZE  WC_SHA512_BLOCK_SIZE
#elif defined(HAVE_BLAKE2B)
    #define WC_MAX_DIGEST_SIZE BLAKE2B_OUTBYTES
    #define WC_MAX_BLOCK_SIZE  BLAKE2B_BLOCKBYTES
#elif defined(WOLFSSL_SHA384)
    #define WC_MAX_DIGEST_SIZE WC_SHA384_DIGEST_SIZE
    #define WC_MAX_BLOCK_SIZE  WC_SHA384_BLOCK_SIZE
#elif !defined(NO_SHA) && !defined(NO_MD5)
    #define WC_MAX_DIGEST_SIZE (WC_SHA_DIGEST_SIZE + WC_MD5_DIGEST_SIZE)
    #define WC_MAX_BLOCK_SIZE  WC_SHA_BLOCK_SIZE
#elif !defined(NO_SHA256)
    #define WC_MAX_DIGEST_SIZE WC_SHA256_DIGEST_SIZE
    #define WC_MAX_BLOCK_SIZE  WC_SHA256_BLOCK_SIZE
#elif defined(WOLFSSL_SM3)
    #define WC_MAX_DIGEST_SIZE WC_SM3_DIGEST_SIZE
    #define WC_MAX_BLOCK_SIZE  WC_SM3_BLOCK_SIZE
#elif defined(WOLFSSL_SHA224)
    #define WC_MAX_DIGEST_SIZE WC_SHA224_DIGEST_SIZE
    #define WC_MAX_BLOCK_SIZE  WC_SHA224_BLOCK_SIZE
#elif !defined(NO_SHA)
    #define WC_MAX_DIGEST_SIZE WC_SHA_DIGEST_SIZE
    #define WC_MAX_BLOCK_SIZE  WC_SHA_BLOCK_SIZE
#elif !defined(NO_MD5)
    #define WC_MAX_DIGEST_SIZE WC_MD5_DIGEST_SIZE
    #define WC_MAX_BLOCK_SIZE  WC_MD5_BLOCK_SIZE
#else
    #define WC_MAX_DIGEST_SIZE 64 /* default to max size of 64 */
    #define WC_MAX_BLOCK_SIZE  128
#endif

#if defined(WC_HASH_CUSTOM_MAX_DIGEST_SIZE) && \
    defined(WC_HASH_CUSTOM_MIN_DIGEST_SIZE)
    #if WC_HASH_CUSTOM_MAX_DIGEST_SIZE < \
        WC_HASH_CUSTOM_MIN_DIGEST_SIZE
        #error HASH_CUSTOM_MAX_DIGEST_SIZE < WC_HASH_CUSTOM_MIN_DIGEST_SIZE
    #endif
#endif
#ifdef WC_HASH_CUSTOM_MAX_DIGEST_SIZE
    #undef WC_MAX_DIGEST_SIZE
    #define WC_MAX_DIGEST_SIZE WC_HASH_CUSTOM_MAX_DIGEST_SIZE
#endif
#ifdef WC_HASH_CUSTOM_MAX_BLOCK_SIZE
    #undef WC_MAX_BLOCK_SIZE
    #define WC_MAX_BLOCK_SIZE WC_HASH_CUSTOM_MAX_BLOCK_SIZE
#endif

#if defined(WC_HASH_CUSTOM_MIN_DIGEST_SIZE)
    #if defined(WC_FIPS_186_5_PLUS) && \
            (WC_HASH_CUSTOM_MIN_DIGEST_SIZE < 224 / 8)
        #error FIPS 186-5 requires a minimum hash size >= SHA-224.
    #elif defined(WC_FIPS_186_4) && \
            (WC_HASH_CUSTOM_MIN_DIGEST_SIZE < 160 / 8)
        #error FIPS 186-4 requires a minimum hash size >= SHA-1.
    #elif (WC_HASH_CUSTOM_MIN_DIGEST_SIZE < 128 / 8)
        #error WC_HASH_CUSTOM_MIN_DIGEST_SIZE is too small.
    #endif
    /* Let the user override the minimum digest size */
    #define WC_MIN_DIGEST_SIZE WC_HASH_CUSTOM_MIN_DIGEST_SIZE
#elif defined(WOLFSSL_MD2) && !defined(WC_FIPS_186_4_PLUS)
    #define WC_MIN_DIGEST_SIZE WC_MD2_DIGEST_SIZE /* 16 */
#elif !defined(NO_MD4) && !defined(WC_FIPS_186_4_PLUS)
    #define WC_MIN_DIGEST_SIZE WC_MD4_DIGEST_SIZE /* 16 */
#elif !defined(NO_MD5) && !defined(WC_FIPS_186_4_PLUS)
    #define WC_MIN_DIGEST_SIZE WC_MD5_DIGEST_SIZE /* 16 */
#elif !defined(NO_SHA) && !defined(WC_FIPS_186_5_PLUS)
    #define WC_MIN_DIGEST_SIZE WC_SHA_DIGEST_SIZE /* 20 */
#elif defined(WOLFSSL_SHA224)
    #define WC_MIN_DIGEST_SIZE WC_SHA224_DIGEST_SIZE
#elif !defined(HAVE_FIPS) && !defined(HAVE_SELFTEST) && \
    defined(WOLFSSL_SHA512) && !defined(WOLFSSL_NOSHA512_224)
    #define WC_MIN_DIGEST_SIZE WC_SHA512_224_DIGEST_SIZE
#elif defined(WOLFSSL_SHA3) && !defined(WOLFSSL_NOSHA3_224)
    #define WC_MIN_DIGEST_SIZE WC_SHA3_224_DIGEST_SIZE
#elif !defined(NO_SHA256)
    #define WC_MIN_DIGEST_SIZE WC_SHA256_DIGEST_SIZE
#elif !defined(HAVE_FIPS) && !defined(HAVE_SELFTEST) && \
    defined(WOLFSSL_SHA512) && !defined(WOLFSSL_NOSHA512_256)
    #define WC_MIN_DIGEST_SIZE WC_SHA512_256_DIGEST_SIZE
#elif defined(WOLFSSL_SHA3) && !defined(WOLFSSL_NOSHA3_256)
    #define WC_MIN_DIGEST_SIZE WC_SHA3_256_DIGEST_SIZE
#elif defined(HAVE_BLAKE2S)
    #define WC_MIN_DIGEST_SIZE BLAKE2S_OUTBYTES /* 32 */
#elif defined(WOLFSSL_SM3)
    #define WC_MIN_DIGEST_SIZE WC_SM3_DIGEST_SIZE /* 32 */
#elif defined(WOLFSSL_SHA384)
    #define WC_MIN_DIGEST_SIZE WC_SHA384_DIGEST_SIZE
#elif defined(WOLFSSL_SHA3) && !defined(WOLFSSL_NOSHA3_384)
    #define WC_MIN_DIGEST_SIZE WC_SHA3_384_DIGEST_SIZE
#elif defined(WOLFSSL_SHA512)
    #define WC_MIN_DIGEST_SIZE WC_SHA512_DIGEST_SIZE
#elif defined(WOLFSSL_SHA3) && !defined(WOLFSSL_NOSHA3_512)
    #define WC_MIN_DIGEST_SIZE WC_SHA3_512_DIGEST_SIZE
#elif defined(HAVE_BLAKE2B)
    #define WC_MIN_DIGEST_SIZE BLAKE2B_OUTBYTES /* 64 */
#elif defined(WOLFSSL_SHAKE128) || defined(WOLFSSL_SHAKE256)
    #error SHAKE enabled without SHA-3.
    #define WC_MIN_DIGEST_SIZE 64
#else
    #error No builtin hashes enabled and no WC_HASH_CUSTOM_MIN_DIGEST_SIZE.
    #define WC_MIN_DIGEST_SIZE 64
#endif

#if !defined(NO_ASN) || !defined(NO_DH) || defined(HAVE_ECC)
WOLFSSL_API int wc_HashGetOID(enum wc_HashType hash_type);
WOLFSSL_API enum wc_HashType wc_OidGetHash(int oid);
#endif

WOLFSSL_API enum wc_HashType wc_HashTypeConvert(int hashType);

#ifndef NO_HASH_WRAPPER

WOLFSSL_API int wc_HashGetDigestSize(enum wc_HashType hash_type);
WOLFSSL_API int wc_HashGetBlockSize(enum wc_HashType hash_type);
WOLFSSL_API int wc_Hash(enum wc_HashType hash_type,
    const byte* data, word32 data_len,
    byte* hash, word32 hash_len);
WOLFSSL_API int wc_Hash_ex(enum wc_HashType hash_type,
    const byte* data, word32 data_len,
    byte* hash, word32 hash_len, void* heap, int devId);

/* generic hash operation wrappers */
WOLFSSL_API int wc_HashInit_ex(wc_HashAlg* hash, enum wc_HashType type,
    void* heap, int devId);
WOLFSSL_API int wc_HashInit(wc_HashAlg* hash, enum wc_HashType type);
WOLFSSL_API int wc_HashUpdate(wc_HashAlg* hash, enum wc_HashType type,
    const byte* data, word32 dataSz);
WOLFSSL_API int wc_HashFinal(wc_HashAlg* hash, enum wc_HashType type,
    byte* out);
WOLFSSL_API int wc_HashFree(wc_HashAlg* hash, enum wc_HashType type);
#ifndef WC_NO_CONSTRUCTORS
WOLFSSL_API wc_HashAlg* wc_HashNew(enum wc_HashType type, void* heap,
                                   int devId, int *result_code);
WOLFSSL_API int wc_HashDelete(wc_HashAlg *hash, wc_HashAlg **hash_p);
#endif

#ifdef WOLFSSL_HASH_FLAGS
    WOLFSSL_API int wc_HashSetFlags(wc_HashAlg* hash, enum wc_HashType type,
        word32 flags);
    WOLFSSL_API int wc_HashGetFlags(wc_HashAlg* hash, enum wc_HashType type,
        word32* flags);
#endif

#ifndef NO_MD5
#include <wolfssl/wolfcrypt/md5.h>
WOLFSSL_API int wc_Md5Hash(const byte* data, word32 len, byte* hash);
WOLFSSL_API int wc_Md5Hash_ex(const byte* data, word32 len, byte* hash,
    void* heap, int devId);
#endif

#ifndef NO_SHA
#include <wolfssl/wolfcrypt/sha.h>
WOLFSSL_API int wc_ShaHash(const byte* data, word32 len, byte* hash);
WOLFSSL_API int wc_ShaHash_ex(const byte* data, word32 len, byte* hash,
    void* heap, int devId);
#endif

#ifdef WOLFSSL_SHA224
#include <wolfssl/wolfcrypt/sha256.h>
WOLFSSL_API int wc_Sha224Hash(const byte* data, word32 len, byte* hash);
WOLFSSL_API int wc_Sha224Hash_ex(const byte* data, word32 len, byte* hash,
    void* heap, int devId);
#endif /* defined(WOLFSSL_SHA224) */

#ifndef NO_SHA256
#include <wolfssl/wolfcrypt/sha256.h>
WOLFSSL_API int wc_Sha256Hash(const byte* data, word32 len, byte* hash);
WOLFSSL_API int wc_Sha256Hash_ex(const byte* data, word32 len, byte* hash,
    void* heap, int devId);
#endif

#ifdef WOLFSSL_SHA384
#include <wolfssl/wolfcrypt/sha512.h>
WOLFSSL_API int wc_Sha384Hash(const byte* data, word32 len, byte* hash);
WOLFSSL_API int wc_Sha384Hash_ex(const byte* data, word32 len, byte* hash,
    void* heap, int devId);
#endif /* defined(WOLFSSL_SHA384) */

#ifdef WOLFSSL_SHA512
#include <wolfssl/wolfcrypt/sha512.h>
WOLFSSL_API int wc_Sha512Hash(const byte* data, word32 len, byte* hash);
WOLFSSL_API int wc_Sha512_224Hash(const byte* data, word32 len, byte* hash);
WOLFSSL_API int wc_Sha512_256Hash(const byte* data, word32 len, byte* hash);
WOLFSSL_API int wc_Sha512Hash_ex(const byte* data, word32 len, byte* hash,
    void* heap, int devId);
WOLFSSL_API int wc_Sha512_224Hash_ex(const byte* data, word32 len, byte* hash,
    void* heap, int devId);
WOLFSSL_API int wc_Sha512_256Hash_ex(const byte* data, word32 len, byte* hash,
    void* heap, int devId);
#endif /* WOLFSSL_SHA512 */

#ifdef WOLFSSL_SHA3
#include <wolfssl/wolfcrypt/sha3.h>
WOLFSSL_API int wc_Sha3_224Hash(const byte* data, word32 len, byte* hash);
WOLFSSL_API int wc_Sha3_256Hash(const byte* data, word32 len, byte* hash);
WOLFSSL_API int wc_Sha3_384Hash(const byte* data, word32 len, byte* hash);
WOLFSSL_API int wc_Sha3_512Hash(const byte* data, word32 len, byte* hash);
WOLFSSL_API int wc_Sha3_224Hash_ex(const byte* data, word32 len, byte* hash,
    void* heap, int devId);
WOLFSSL_API int wc_Sha3_256Hash_ex(const byte* data, word32 len, byte* hash,
    void* heap, int devId);
WOLFSSL_API int wc_Sha3_384Hash_ex(const byte* data, word32 len, byte* hash,
    void* heap, int devId);
WOLFSSL_API int wc_Sha3_512Hash_ex(const byte* data, word32 len, byte* hash,
    void* heap, int devId);
#ifdef WOLFSSL_SHAKE128
WOLFSSL_API int wc_Shake128Hash(const byte* data, word32 len, byte* hash,
    word32 hashLen);
WOLFSSL_API int wc_Shake128Hash_ex(const byte* data, word32 len, byte* hash,
    word32 hashLen, void* heap, int devId);
#endif
#ifdef WOLFSSL_SHAKE256
WOLFSSL_API int wc_Shake256Hash(const byte* data, word32 len, byte* hash,
    word32 hashLen);
WOLFSSL_API int wc_Shake256Hash_ex(const byte* data, word32 len, byte* hash,
    word32 hashLen, void* heap, int devId);
#endif
#endif /* WOLFSSL_SHA3 */

#ifdef WOLFSSL_SM3
WOLFSSL_API int wc_Sm3Hash(const byte* data, word32 len, byte* hash);
WOLFSSL_API int wc_Sm3Hash_ex(const byte* data, word32 len, byte* hash,
    void* heap, int devId);
#endif

#endif /* !NO_HASH_WRAPPER */

#if defined(WOLFSSL_HASH_KEEP)
WOLFSSL_LOCAL int _wc_Hash_Grow(byte** msg, word32* used, word32* len,
        const byte* in, int inSz, void* heap);
#endif

#ifdef __cplusplus
    } /* extern "C" */
#endif

#endif /* WOLF_CRYPT_HASH_H */
