/* md5.c

 *

 * Copyright (C) 2006-2022 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 2 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

 */

#ifdef HAVE_CONFIG_H

#include <config.h>

#endif

#include <wolfssl/wolfcrypt/settings.h>

#if !defined(NO_MD5)

#if defined(WOLFSSL_TI_HASH)

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

#else

#include <wolfssl/wolfcrypt/md5.h>

#include <wolfssl/wolfcrypt/error-crypt.h>

#include <wolfssl/wolfcrypt/logging.h>

#include <wolfssl/wolfcrypt/hash.h>

#ifdef NO_INLINE

#include <wolfssl/wolfcrypt/misc.h>

#else

#define WOLFSSL_MISC_INCLUDED

#include <wolfcrypt/src/misc.c>

#endif

/* Hardware Acceleration */

#if defined(STM32_HASH)

/* Supports CubeMX HAL or Standard Peripheral Library */

#define HAVE_MD5_CUST_API

int wc_InitMd5_ex(wc_Md5* md5, void* heap, int devId)

{

    if (md5 == NULL) {

        return BAD_FUNC_ARG;

    }

    (void)devId;

    (void)heap;

    wc_Stm32_Hash_Init(&md5->stmCtx);

    return 0;

}

int wc_Md5Update(wc_Md5* md5, const byte* data, word32 len)

{

    int ret;

    if (md5 == NULL || (data == NULL && len > 0)) {

        return BAD_FUNC_ARG;

    }

    ret = wolfSSL_CryptHwMutexLock();

    if (ret == 0) {

        ret = wc_Stm32_Hash_Update(&md5->stmCtx, HASH_AlgoSelection_MD5,

                                   data, len, WC_MD5_BLOCK_SIZE);

        wolfSSL_CryptHwMutexUnLock();

    }

    return ret;

}

int wc_Md5Final(wc_Md5* md5, byte* hash)

{

    int ret;

    if (md5 == NULL || hash == NULL) {

        return BAD_FUNC_ARG;

    }

    ret = wolfSSL_CryptHwMutexLock();

    if (ret == 0) {

        ret = wc_Stm32_Hash_Final(&md5->stmCtx, HASH_AlgoSelection_MD5,

                                  hash, WC_MD5_DIGEST_SIZE);

        wolfSSL_CryptHwMutexUnLock();

    }

    (void)wc_InitMd5(md5);  /* reset state */

    return ret;

}

#elif defined(FREESCALE_MMCAU_SHA)

#ifdef FREESCALE_MMCAU_CLASSIC_SHA

    #include "cau_api.h"

#else

    #include "fsl_mmcau.h"

#endif

#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 Transform(wc_Md5* md5, const byte* data)

{

    int ret = wolfSSL_CryptHwMutexLock();

    if (ret == 0) {

#ifdef FREESCALE_MMCAU_CLASSIC_SHA

        cau_md5_hash_n((byte*)data, 1, (unsigned char*)md5->digest);

#else

        MMCAU_MD5_HashN((byte*)data, 1, (uint32_t*)md5->digest);

#endif

        wolfSSL_CryptHwMutexUnLock();

    }

    return ret;

}

static int Transform_Len(wc_Md5* md5, 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*)md5->buffer;

            while (len >= WC_MD5_BLOCK_SIZE) {

                XMEMCPY(local, data, WC_MD5_BLOCK_SIZE);

            #ifdef FREESCALE_MMCAU_CLASSIC_SHA

                cau_md5_hash_n(local, 1, (unsigned char*)md5->digest);

            #else

                MMCAU_MD5_HashN(local, 1, (uint32_t*)md5->digest);

            #endif

                data += WC_MD5_BLOCK_SIZE;

                len  -= WC_MD5_BLOCK_SIZE;

            }

        }

        else

    #endif

        {

#ifdef FREESCALE_MMCAU_CLASSIC_SHA

        cau_md5_hash_n((byte*)data, len / WC_MD5_BLOCK_SIZE,

            (unsigned char*)md5->digest);

#else

        MMCAU_MD5_HashN((byte*)data, len / WC_MD5_BLOCK_SIZE,

            (uint32_t*)md5->digest);

#endif

        }

        wolfSSL_CryptHwMutexUnLock();

    }

    return ret;

}

#elif defined(WOLFSSL_PIC32MZ_HASH)

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

#define HAVE_MD5_CUST_API

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

    !defined(WOLFSSL_QNX_CAAM)

/* functions implemented in wolfcrypt/src/port/caam/caam_sha.c */

#define HAVE_MD5_CUST_API

#else

#define NEED_SOFT_MD5

#endif /* End Hardware Acceleration */

#ifdef NEED_SOFT_MD5

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

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

#define F2(x, y, z) F1(z, x, y)

#define F3(x, y, z) ((x) ^ (y) ^ (z))

#define F4(x, y, z) ((y) ^ ((x) | ~(z)))

#define MD5STEP(f, w, x, y, z, data, s) \

    (w) = (rotlFixed((w) + f(x, y, z) + (data), s) + (x))

static int Transform(wc_Md5* md5, const byte* data)

{

    const word32* buffer = (const word32*)data;

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

    word32 a = md5->digest[0];

    word32 b = md5->digest[1];

    word32 c = md5->digest[2];

    word32 d = md5->digest[3];

    MD5STEP(F1, a, b, c, d, buffer[0]  + 0xd76aa478,  7);

    MD5STEP(F1, d, a, b, c, buffer[1]  + 0xe8c7b756, 12);

    MD5STEP(F1, c, d, a, b, buffer[2]  + 0x242070db, 17);

    MD5STEP(F1, b, c, d, a, buffer[3]  + 0xc1bdceee, 22);

    MD5STEP(F1, a, b, c, d, buffer[4]  + 0xf57c0faf,  7);

    MD5STEP(F1, d, a, b, c, buffer[5]  + 0x4787c62a, 12);

    MD5STEP(F1, c, d, a, b, buffer[6]  + 0xa8304613, 17);

    MD5STEP(F1, b, c, d, a, buffer[7]  + 0xfd469501, 22);

    MD5STEP(F1, a, b, c, d, buffer[8]  + 0x698098d8,  7);

    MD5STEP(F1, d, a, b, c, buffer[9]  + 0x8b44f7af, 12);

    MD5STEP(F1, c, d, a, b, buffer[10] + 0xffff5bb1, 17);

    MD5STEP(F1, b, c, d, a, buffer[11] + 0x895cd7be, 22);

    MD5STEP(F1, a, b, c, d, buffer[12] + 0x6b901122,  7);

    MD5STEP(F1, d, a, b, c, buffer[13] + 0xfd987193, 12);

    MD5STEP(F1, c, d, a, b, buffer[14] + 0xa679438e, 17);

    MD5STEP(F1, b, c, d, a, buffer[15] + 0x49b40821, 22);

    MD5STEP(F2, a, b, c, d, buffer[1]  + 0xf61e2562,  5);

    MD5STEP(F2, d, a, b, c, buffer[6]  + 0xc040b340,  9);

    MD5STEP(F2, c, d, a, b, buffer[11] + 0x265e5a51, 14);

    MD5STEP(F2, b, c, d, a, buffer[0]  + 0xe9b6c7aa, 20);

    MD5STEP(F2, a, b, c, d, buffer[5]  + 0xd62f105d,  5);

    MD5STEP(F2, d, a, b, c, buffer[10] + 0x02441453,  9);

    MD5STEP(F2, c, d, a, b, buffer[15] + 0xd8a1e681, 14);

    MD5STEP(F2, b, c, d, a, buffer[4]  + 0xe7d3fbc8, 20);

    MD5STEP(F2, a, b, c, d, buffer[9]  + 0x21e1cde6,  5);

    MD5STEP(F2, d, a, b, c, buffer[14] + 0xc33707d6,  9);

    MD5STEP(F2, c, d, a, b, buffer[3]  + 0xf4d50d87, 14);

    MD5STEP(F2, b, c, d, a, buffer[8]  + 0x455a14ed, 20);

    MD5STEP(F2, a, b, c, d, buffer[13] + 0xa9e3e905,  5);

    MD5STEP(F2, d, a, b, c, buffer[2]  + 0xfcefa3f8,  9);

    MD5STEP(F2, c, d, a, b, buffer[7]  + 0x676f02d9, 14);

    MD5STEP(F2, b, c, d, a, buffer[12] + 0x8d2a4c8a, 20);

    MD5STEP(F3, a, b, c, d, buffer[5]  + 0xfffa3942,  4);

    MD5STEP(F3, d, a, b, c, buffer[8]  + 0x8771f681, 11);

    MD5STEP(F3, c, d, a, b, buffer[11] + 0x6d9d6122, 16);

    MD5STEP(F3, b, c, d, a, buffer[14] + 0xfde5380c, 23);

    MD5STEP(F3, a, b, c, d, buffer[1]  + 0xa4beea44,  4);

    MD5STEP(F3, d, a, b, c, buffer[4]  + 0x4bdecfa9, 11);

    MD5STEP(F3, c, d, a, b, buffer[7]  + 0xf6bb4b60, 16);

    MD5STEP(F3, b, c, d, a, buffer[10] + 0xbebfbc70, 23);

    MD5STEP(F3, a, b, c, d, buffer[13] + 0x289b7ec6,  4);

    MD5STEP(F3, d, a, b, c, buffer[0]  + 0xeaa127fa, 11);

    MD5STEP(F3, c, d, a, b, buffer[3]  + 0xd4ef3085, 16);

    MD5STEP(F3, b, c, d, a, buffer[6]  + 0x04881d05, 23);

    MD5STEP(F3, a, b, c, d, buffer[9]  + 0xd9d4d039,  4);

    MD5STEP(F3, d, a, b, c, buffer[12] + 0xe6db99e5, 11);

    MD5STEP(F3, c, d, a, b, buffer[15] + 0x1fa27cf8, 16);

    MD5STEP(F3, b, c, d, a, buffer[2]  + 0xc4ac5665, 23);

    MD5STEP(F4, a, b, c, d, buffer[0]  + 0xf4292244,  6);

    MD5STEP(F4, d, a, b, c, buffer[7]  + 0x432aff97, 10);

    MD5STEP(F4, c, d, a, b, buffer[14] + 0xab9423a7, 15);

    MD5STEP(F4, b, c, d, a, buffer[5]  + 0xfc93a039, 21);

    MD5STEP(F4, a, b, c, d, buffer[12] + 0x655b59c3,  6);

    MD5STEP(F4, d, a, b, c, buffer[3]  + 0x8f0ccc92, 10);

    MD5STEP(F4, c, d, a, b, buffer[10] + 0xffeff47d, 15);

    MD5STEP(F4, b, c, d, a, buffer[1]  + 0x85845dd1, 21);

    MD5STEP(F4, a, b, c, d, buffer[8]  + 0x6fa87e4f,  6);

    MD5STEP(F4, d, a, b, c, buffer[15] + 0xfe2ce6e0, 10);

    MD5STEP(F4, c, d, a, b, buffer[6]  + 0xa3014314, 15);

    MD5STEP(F4, b, c, d, a, buffer[13] + 0x4e0811a1, 21);

    MD5STEP(F4, a, b, c, d, buffer[4]  + 0xf7537e82,  6);

    MD5STEP(F4, d, a, b, c, buffer[11] + 0xbd3af235, 10);

    MD5STEP(F4, c, d, a, b, buffer[2]  + 0x2ad7d2bb, 15);

    MD5STEP(F4, b, c, d, a, buffer[9]  + 0xeb86d391, 21);

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

    md5->digest[0] += a;

    md5->digest[1] += b;

    md5->digest[2] += c;

    md5->digest[3] += d;

    return 0;

}

#endif /* NEED_SOFT_MD5 */

#ifndef HAVE_MD5_CUST_API

static WC_INLINE void AddLength(wc_Md5* md5, word32 len)

{

    word32 tmp = md5->loLen;

    if ((md5->loLen += len) < tmp) {

        md5->hiLen++;                       /* carry low to high */

    }

}

static int _InitMd5(wc_Md5* md5)

{

    int ret = 0;

    md5->digest[0] = 0x67452301L;

    md5->digest[1] = 0xefcdab89L;

    md5->digest[2] = 0x98badcfeL;

    md5->digest[3] = 0x10325476L;

    md5->buffLen = 0;

    md5->loLen   = 0;

    md5->hiLen   = 0;

#ifdef WOLFSSL_HASH_FLAGS

    md5->flags = 0;

#endif

    return ret;

}

int wc_InitMd5_ex(wc_Md5* md5, void* heap, int devId)

{

    int ret = 0;

    if (md5 == NULL)

        return BAD_FUNC_ARG;

    md5->heap = heap;

    ret = _InitMd5(md5);

    if (ret != 0)

        return ret;

#if defined(WOLFSSL_ASYNC_CRYPT) && defined(WC_ASYNC_ENABLE_MD5)

    ret = wolfAsync_DevCtxInit(&md5->asyncDev, WOLFSSL_ASYNC_MARKER_MD5,

                               md5->heap, devId);

#else

    (void)devId;

#endif

    return ret;

}

/* do block size increments/updates */

int wc_Md5Update(wc_Md5* md5, const byte* data, word32 len)

{

    int ret = 0;

    word32 blocksLen;

    byte* local;

    if (md5 == NULL || (data == NULL && len > 0)) {

        return BAD_FUNC_ARG;

    }

#if defined(WOLFSSL_ASYNC_CRYPT) && defined(WC_ASYNC_ENABLE_MD5)

    if (md5->asyncDev.marker == WOLFSSL_ASYNC_MARKER_MD5) {

#if defined(HAVE_INTEL_QA)

        return IntelQaSymMd5(&md5->asyncDev, NULL, data, len);

#endif

    }

#endif /* WOLFSSL_ASYNC_CRYPT */

    /* check that internal buffLen is valid */

    if (md5->buffLen >= WC_MD5_BLOCK_SIZE)

        return BUFFER_E;

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

        /* valid, but do nothing */

        return 0;

    }

    /* add length for final */

    AddLength(md5, len);

    local = (byte*)md5->buffer;

    /* process any remainder from previous operation */

    if (md5->buffLen > 0) {

        blocksLen = min(len, WC_MD5_BLOCK_SIZE - md5->buffLen);

        XMEMCPY(&local[md5->buffLen], data, blocksLen);

        md5->buffLen += blocksLen;

        data         += blocksLen;

        len          -= blocksLen;

        if (md5->buffLen == WC_MD5_BLOCK_SIZE) {

        #if defined(BIG_ENDIAN_ORDER) && !defined(FREESCALE_MMCAU_SHA)

            ByteReverseWords(md5->buffer, md5->buffer, WC_MD5_BLOCK_SIZE);

        #endif

            ret = XTRANSFORM(md5, (const byte*)local);

            if (ret != 0)

                return ret;

            md5->buffLen = 0;

        }

    }

    /* 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_MD5_BLOCK_SIZE-1);

    if (blocksLen > 0) {

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

        XTRANSFORM_LEN(md5, data, blocksLen);

        data += blocksLen;

        len  -= blocksLen;

    }

#else

    while (len >= WC_MD5_BLOCK_SIZE) {

        word32* local32 = md5->buffer;

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

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

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

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

            local32 = (word32*)data;

        }

        else

    #endif

        {

            XMEMCPY(local32, data, WC_MD5_BLOCK_SIZE);

        }

        data += WC_MD5_BLOCK_SIZE;

        len  -= WC_MD5_BLOCK_SIZE;

    #if defined(BIG_ENDIAN_ORDER) && !defined(FREESCALE_MMCAU_SHA)

        ByteReverseWords(local32, local32, WC_MD5_BLOCK_SIZE);

    #endif

        ret = XTRANSFORM(md5, (const byte*)local32);

    }

#endif /* XTRANSFORM_LEN */

    /* save remainder */

    if (len > 0) {

        XMEMCPY(local, data, len);

        md5->buffLen = len;

    }

    return ret;

}

int wc_Md5Final(wc_Md5* md5, byte* hash)

{

    byte* local;

    if (md5 == NULL || hash == NULL) {

        return BAD_FUNC_ARG;

    }

#if defined(WOLFSSL_ASYNC_CRYPT) && defined(WC_ASYNC_ENABLE_MD5)

    if (md5->asyncDev.marker == WOLFSSL_ASYNC_MARKER_MD5) {

#if defined(HAVE_INTEL_QA)

        return IntelQaSymMd5(&md5->asyncDev, hash, NULL, WC_MD5_DIGEST_SIZE);

#endif

    }

#endif /* WOLFSSL_ASYNC_CRYPT */

    local = (byte*)md5->buffer;

    local[md5->buffLen++] = 0x80;  /* add 1 */

    /* pad with zeros */

    if (md5->buffLen > WC_MD5_PAD_SIZE) {

        XMEMSET(&local[md5->buffLen], 0, WC_MD5_BLOCK_SIZE - md5->buffLen);

        md5->buffLen += WC_MD5_BLOCK_SIZE - md5->buffLen;

#if defined(BIG_ENDIAN_ORDER) && !defined(FREESCALE_MMCAU_SHA)

        ByteReverseWords(md5->buffer, md5->buffer, WC_MD5_BLOCK_SIZE);

#endif

        XTRANSFORM(md5, local);

        md5->buffLen = 0;

    }

    XMEMSET(&local[md5->buffLen], 0, WC_MD5_PAD_SIZE - md5->buffLen);

#if defined(BIG_ENDIAN_ORDER) && !defined(FREESCALE_MMCAU_SHA)

    ByteReverseWords(md5->buffer, md5->buffer, WC_MD5_BLOCK_SIZE);

#endif

    /* put lengths in bits */

    md5->hiLen = (md5->loLen >> (8 * sizeof(md5->loLen) - 3)) +

                 (md5->hiLen << 3);

    md5->loLen = md5->loLen << 3;

    /* store lengths */

    /* ! length ordering dependent on digest endian type ! */

    XMEMCPY(&local[WC_MD5_PAD_SIZE], &md5->loLen, sizeof(word32));

    XMEMCPY(&local[WC_MD5_PAD_SIZE + sizeof(word32)], &md5->hiLen, sizeof(word32));

    /* final transform and result to hash */

    XTRANSFORM(md5, local);

#ifdef BIG_ENDIAN_ORDER

    ByteReverseWords(md5->digest, md5->digest, WC_MD5_DIGEST_SIZE);

#endif

    XMEMCPY(hash, md5->digest, WC_MD5_DIGEST_SIZE);

    return _InitMd5(md5); /* reset state */

}

#endif /* !HAVE_MD5_CUST_API */

int wc_InitMd5(wc_Md5* md5)

{

    if (md5 == NULL) {

        return BAD_FUNC_ARG;

    }

    return wc_InitMd5_ex(md5, NULL, INVALID_DEVID);

}

void wc_Md5Free(wc_Md5* md5)

{

    if (md5 == NULL)

        return;

#if defined(WOLFSSL_ASYNC_CRYPT) && defined(WC_ASYNC_ENABLE_MD5)

    wolfAsync_DevCtxFree(&md5->asyncDev, WOLFSSL_ASYNC_MARKER_MD5);

#endif /* WOLFSSL_ASYNC_CRYPT */

#ifdef WOLFSSL_PIC32MZ_HASH

    wc_Md5Pic32Free(md5);

#endif

}

int wc_Md5GetHash(wc_Md5* md5, byte* hash)

{

    int ret;

    wc_Md5 tmpMd5;

    if (md5 == NULL || hash == NULL)

        return BAD_FUNC_ARG;

    ret = wc_Md5Copy(md5, &tmpMd5);

    if (ret == 0) {

        ret = wc_Md5Final(&tmpMd5, hash);

    }

    return ret;

}

int wc_Md5Copy(wc_Md5* src, wc_Md5* dst)

{

    int ret = 0;

    if (src == NULL || dst == NULL)

        return BAD_FUNC_ARG;

    XMEMCPY(dst, src, sizeof(wc_Md5));

#if defined(WOLFSSL_ASYNC_CRYPT) && defined(WC_ASYNC_ENABLE_MD5)

    ret = wolfAsync_DevCopy(&src->asyncDev, &dst->asyncDev);

#endif

#ifdef WOLFSSL_PIC32MZ_HASH

    ret = wc_Pic32HashCopy(&src->cache, &dst->cache);

#endif

#ifdef WOLFSSL_HASH_FLAGS

    dst->flags |= WC_HASH_FLAG_ISCOPY;

#endif

    return ret;

}

#ifdef OPENSSL_EXTRA

/* Apply MD5 transformation to the data                   */

/* @param md5  a pointer to wc_MD5 structure              */

/* @param data data to be applied MD5 transformation      */

/* @return 0 on successful, otherwise non-zero on failure */

int wc_Md5Transform(wc_Md5* md5, const byte* data)

{

    /* sanity check */

    if (md5 == NULL || data == NULL) {

        return BAD_FUNC_ARG;

    }

#ifndef HAVE_MD5_CUST_API

    return Transform(md5, data);

#else

    return NOT_COMPILED_IN;

#endif

}

#endif /* OPENSSL_EXTRA */

#ifdef WOLFSSL_HASH_FLAGS

int wc_Md5SetFlags(wc_Md5* md5, word32 flags)

{

    if (md5) {

        md5->flags = flags;

    }

    return 0;

}

int wc_Md5GetFlags(wc_Md5* md5, word32* flags)

{

    if (md5 && flags) {

        *flags = md5->flags;

    }

    return 0;

}

#endif

#endif /* WOLFSSL_TI_HASH */

#endif /* NO_MD5 */