md5.c

00001 /* md5.c
00002  *
00003  * Copyright (C) 2006-2016 wolfSSL Inc.
00004  *
00005  * This file is part of wolfSSL.
00006  *
00007  * wolfSSL is free software; you can redistribute it and/or modify
00008  * it under the terms of the GNU General Public License as published by
00009  * the Free Software Foundation; either version 2 of the License, or
00010  * (at your option) any later version.
00011  *
00012  * wolfSSL is distributed in the hope that it will be useful,
00013  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00014  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00015  * GNU General Public License for more details.
00016  *
00017  * You should have received a copy of the GNU General Public License
00018  * along with this program; if not, write to the Free Software
00019  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
00020  */
00021 
00022 
00023 
00024 #ifdef HAVE_CONFIG_H
00025     #include <config.h>
00026 #endif
00027 
00028 #include <wolfssl/wolfcrypt/settings.h>
00029 
00030 #if !defined(NO_MD5)
00031 
00032 #if defined(WOLFSSL_TI_HASH)
00033     /* #include <wolfcrypt/src/port/ti/ti-hash.c> included by wc_port.c */
00034 
00035 #else
00036 
00037 #include <wolfssl/wolfcrypt/md5.h>
00038 #include <wolfssl/wolfcrypt/error-crypt.h>
00039 
00040 #ifdef NO_INLINE
00041     #include <wolfssl/wolfcrypt/misc.h>
00042 #else
00043     #define WOLFSSL_MISC_INCLUDED
00044     #include <wolfcrypt/src/misc.c>
00045 #endif
00046 
00047 
00048 /* Hardware Acceleration */
00049 #if defined(STM32F2_HASH) || defined(STM32F4_HASH)
00050     /*
00051      * STM32F2/F4 hardware MD5 support through the standard peripheral
00052      * library. (See note in README).
00053      */
00054 
00055     #define HAVE_MD5_CUST_API
00056 
00057     int wc_InitMd5_ex(Md5* md5, void* heap, int devId)
00058     {
00059         (void)heap;
00060         (void)devId;
00061 
00062         /* STM32 struct notes:
00063          * md5->buffer  = first 4 bytes used to hold partial block if needed
00064          * md5->buffLen = num bytes currently stored in md5->buffer
00065          * md5->loLen   = num bytes that have been written to STM32 FIFO
00066          */
00067         XMEMSET(md5->buffer, 0, MD5_REG_SIZE);
00068 
00069         md5->buffLen = 0;
00070         md5->loLen = 0;
00071 
00072         /* initialize HASH peripheral */
00073         HASH_DeInit();
00074 
00075         /* configure algo used, algo mode, datatype */
00076         HASH->CR &= ~ (HASH_CR_ALGO | HASH_CR_DATATYPE | HASH_CR_MODE);
00077         HASH->CR |= (HASH_AlgoSelection_MD5 | HASH_AlgoMode_HASH
00078                  | HASH_DataType_8b);
00079 
00080         /* reset HASH processor */
00081         HASH->CR |= HASH_CR_INIT;
00082 
00083         return 0;
00084     }
00085 
00086     int wc_Md5Update(Md5* md5, const byte* data, word32 len)
00087     {
00088         word32 i = 0;
00089         word32 fill = 0;
00090         word32 diff = 0;
00091 
00092         /* if saved partial block is available */
00093         if (md5->buffLen > 0) {
00094             fill = 4 - md5->buffLen;
00095 
00096             /* if enough data to fill, fill and push to FIFO */
00097             if (fill <= len) {
00098                 XMEMCPY((byte*)md5->buffer + md5->buffLen, data, fill);
00099                 HASH_DataIn(*(uint32_t*)md5->buffer);
00100 
00101                 data += fill;
00102                 len -= fill;
00103                 md5->loLen += 4;
00104                 md5->buffLen = 0;
00105             } else {
00106                 /* append partial to existing stored block */
00107                 XMEMCPY((byte*)md5->buffer + md5->buffLen, data, len);
00108                 md5->buffLen += len;
00109                 return 0;
00110             }
00111         }
00112 
00113         /* write input block in the IN FIFO */
00114         for (i = 0; i < len; i += 4)
00115         {
00116             diff = len - i;
00117             if (diff < 4) {
00118                 /* store incomplete last block, not yet in FIFO */
00119                 XMEMSET(md5->buffer, 0, MD5_REG_SIZE);
00120                 XMEMCPY((byte*)md5->buffer, data, diff);
00121                 md5->buffLen = diff;
00122             } else {
00123                 HASH_DataIn(*(uint32_t*)data);
00124                 data+=4;
00125             }
00126         }
00127 
00128         /* keep track of total data length thus far */
00129         md5->loLen += (len - md5->buffLen);
00130 
00131         return 0;
00132     }
00133 
00134     int wc_Md5Final(Md5* md5, byte* hash)
00135     {
00136         __IO uint16_t nbvalidbitsdata = 0;
00137 
00138         /* finish reading any trailing bytes into FIFO */
00139         if (md5->buffLen > 0) {
00140             HASH_DataIn(*(uint32_t*)md5->buffer);
00141             md5->loLen += md5->buffLen;
00142         }
00143 
00144         /* calculate number of valid bits in last word of input data */
00145         nbvalidbitsdata = 8 * (md5->loLen % MD5_REG_SIZE);
00146 
00147         /* configure number of valid bits in last word of the data */
00148         HASH_SetLastWordValidBitsNbr(nbvalidbitsdata);
00149 
00150         /* start HASH processor */
00151         HASH_StartDigest();
00152 
00153         /* wait until Busy flag == RESET */
00154         while (HASH_GetFlagStatus(HASH_FLAG_BUSY) != RESET) {}
00155 
00156         /* read message digest */
00157         md5->digest[0] = HASH->HR[0];
00158         md5->digest[1] = HASH->HR[1];
00159         md5->digest[2] = HASH->HR[2];
00160         md5->digest[3] = HASH->HR[3];
00161 
00162         ByteReverseWords(md5->digest, md5->digest, MD5_DIGEST_SIZE);
00163 
00164         XMEMCPY(hash, md5->digest, MD5_DIGEST_SIZE);
00165 
00166         return wc_InitMd5(md5);  /* reset state */
00167     }
00168 
00169 #elif defined(FREESCALE_MMCAU_SHA)
00170     #include "cau_api.h"
00171     #define XTRANSFORM(S,B)  Transform((S), (B))
00172 
00173     static int Transform(Md5* md5, byte* data)
00174     {
00175         int ret = wolfSSL_CryptHwMutexLock();
00176         if(ret == 0) {
00177             MMCAU_MD5_HashN(data, 1, (uint32_t*)md5->digest);
00178             wolfSSL_CryptHwMutexUnLock();
00179         }
00180         return ret;
00181     }
00182 
00183 #elif defined(WOLFSSL_PIC32MZ_HASH)
00184     #define wc_InitMd5   wc_InitMd5_sw
00185     #define wc_Md5Update wc_Md5Update_sw
00186     #define wc_Md5Final  wc_Md5Final_sw
00187 
00188     #define NEED_SOFT_MD5
00189 
00190 #else
00191     #define NEED_SOFT_MD5
00192 
00193 #endif /* End Hardware Acceleration */
00194 
00195 
00196 #ifdef NEED_SOFT_MD5
00197 
00198     #define XTRANSFORM(S,B)  Transform((S))
00199 
00200     #define F1(x, y, z) (z ^ (x & (y ^ z)))
00201     #define F2(x, y, z) F1(z, x, y)
00202     #define F3(x, y, z) (x ^ y ^ z)
00203     #define F4(x, y, z) (y ^ (x | ~z))
00204 
00205     #define MD5STEP(f, w, x, y, z, data, s) \
00206         w = rotlFixed(w + f(x, y, z) + data, s) + x
00207 
00208     static int Transform(Md5* md5)
00209     {
00210         /* Copy context->state[] to working vars  */
00211         word32 a = md5->digest[0];
00212         word32 b = md5->digest[1];
00213         word32 c = md5->digest[2];
00214         word32 d = md5->digest[3];
00215 
00216         MD5STEP(F1, a, b, c, d, md5->buffer[0]  + 0xd76aa478,  7);
00217         MD5STEP(F1, d, a, b, c, md5->buffer[1]  + 0xe8c7b756, 12);
00218         MD5STEP(F1, c, d, a, b, md5->buffer[2]  + 0x242070db, 17);
00219         MD5STEP(F1, b, c, d, a, md5->buffer[3]  + 0xc1bdceee, 22);
00220         MD5STEP(F1, a, b, c, d, md5->buffer[4]  + 0xf57c0faf,  7);
00221         MD5STEP(F1, d, a, b, c, md5->buffer[5]  + 0x4787c62a, 12);
00222         MD5STEP(F1, c, d, a, b, md5->buffer[6]  + 0xa8304613, 17);
00223         MD5STEP(F1, b, c, d, a, md5->buffer[7]  + 0xfd469501, 22);
00224         MD5STEP(F1, a, b, c, d, md5->buffer[8]  + 0x698098d8,  7);
00225         MD5STEP(F1, d, a, b, c, md5->buffer[9]  + 0x8b44f7af, 12);
00226         MD5STEP(F1, c, d, a, b, md5->buffer[10] + 0xffff5bb1, 17);
00227         MD5STEP(F1, b, c, d, a, md5->buffer[11] + 0x895cd7be, 22);
00228         MD5STEP(F1, a, b, c, d, md5->buffer[12] + 0x6b901122,  7);
00229         MD5STEP(F1, d, a, b, c, md5->buffer[13] + 0xfd987193, 12);
00230         MD5STEP(F1, c, d, a, b, md5->buffer[14] + 0xa679438e, 17);
00231         MD5STEP(F1, b, c, d, a, md5->buffer[15] + 0x49b40821, 22);
00232 
00233         MD5STEP(F2, a, b, c, d, md5->buffer[1]  + 0xf61e2562,  5);
00234         MD5STEP(F2, d, a, b, c, md5->buffer[6]  + 0xc040b340,  9);
00235         MD5STEP(F2, c, d, a, b, md5->buffer[11] + 0x265e5a51, 14);
00236         MD5STEP(F2, b, c, d, a, md5->buffer[0]  + 0xe9b6c7aa, 20);
00237         MD5STEP(F2, a, b, c, d, md5->buffer[5]  + 0xd62f105d,  5);
00238         MD5STEP(F2, d, a, b, c, md5->buffer[10] + 0x02441453,  9);
00239         MD5STEP(F2, c, d, a, b, md5->buffer[15] + 0xd8a1e681, 14);
00240         MD5STEP(F2, b, c, d, a, md5->buffer[4]  + 0xe7d3fbc8, 20);
00241         MD5STEP(F2, a, b, c, d, md5->buffer[9]  + 0x21e1cde6,  5);
00242         MD5STEP(F2, d, a, b, c, md5->buffer[14] + 0xc33707d6,  9);
00243         MD5STEP(F2, c, d, a, b, md5->buffer[3]  + 0xf4d50d87, 14);
00244         MD5STEP(F2, b, c, d, a, md5->buffer[8]  + 0x455a14ed, 20);
00245         MD5STEP(F2, a, b, c, d, md5->buffer[13] + 0xa9e3e905,  5);
00246         MD5STEP(F2, d, a, b, c, md5->buffer[2]  + 0xfcefa3f8,  9);
00247         MD5STEP(F2, c, d, a, b, md5->buffer[7]  + 0x676f02d9, 14);
00248         MD5STEP(F2, b, c, d, a, md5->buffer[12] + 0x8d2a4c8a, 20);
00249 
00250         MD5STEP(F3, a, b, c, d, md5->buffer[5]  + 0xfffa3942,  4);
00251         MD5STEP(F3, d, a, b, c, md5->buffer[8]  + 0x8771f681, 11);
00252         MD5STEP(F3, c, d, a, b, md5->buffer[11] + 0x6d9d6122, 16);
00253         MD5STEP(F3, b, c, d, a, md5->buffer[14] + 0xfde5380c, 23);
00254         MD5STEP(F3, a, b, c, d, md5->buffer[1]  + 0xa4beea44,  4);
00255         MD5STEP(F3, d, a, b, c, md5->buffer[4]  + 0x4bdecfa9, 11);
00256         MD5STEP(F3, c, d, a, b, md5->buffer[7]  + 0xf6bb4b60, 16);
00257         MD5STEP(F3, b, c, d, a, md5->buffer[10] + 0xbebfbc70, 23);
00258         MD5STEP(F3, a, b, c, d, md5->buffer[13] + 0x289b7ec6,  4);
00259         MD5STEP(F3, d, a, b, c, md5->buffer[0]  + 0xeaa127fa, 11);
00260         MD5STEP(F3, c, d, a, b, md5->buffer[3]  + 0xd4ef3085, 16);
00261         MD5STEP(F3, b, c, d, a, md5->buffer[6]  + 0x04881d05, 23);
00262         MD5STEP(F3, a, b, c, d, md5->buffer[9]  + 0xd9d4d039,  4);
00263         MD5STEP(F3, d, a, b, c, md5->buffer[12] + 0xe6db99e5, 11);
00264         MD5STEP(F3, c, d, a, b, md5->buffer[15] + 0x1fa27cf8, 16);
00265         MD5STEP(F3, b, c, d, a, md5->buffer[2]  + 0xc4ac5665, 23);
00266 
00267         MD5STEP(F4, a, b, c, d, md5->buffer[0]  + 0xf4292244,  6);
00268         MD5STEP(F4, d, a, b, c, md5->buffer[7]  + 0x432aff97, 10);
00269         MD5STEP(F4, c, d, a, b, md5->buffer[14] + 0xab9423a7, 15);
00270         MD5STEP(F4, b, c, d, a, md5->buffer[5]  + 0xfc93a039, 21);
00271         MD5STEP(F4, a, b, c, d, md5->buffer[12] + 0x655b59c3,  6);
00272         MD5STEP(F4, d, a, b, c, md5->buffer[3]  + 0x8f0ccc92, 10);
00273         MD5STEP(F4, c, d, a, b, md5->buffer[10] + 0xffeff47d, 15);
00274         MD5STEP(F4, b, c, d, a, md5->buffer[1]  + 0x85845dd1, 21);
00275         MD5STEP(F4, a, b, c, d, md5->buffer[8]  + 0x6fa87e4f,  6);
00276         MD5STEP(F4, d, a, b, c, md5->buffer[15] + 0xfe2ce6e0, 10);
00277         MD5STEP(F4, c, d, a, b, md5->buffer[6]  + 0xa3014314, 15);
00278         MD5STEP(F4, b, c, d, a, md5->buffer[13] + 0x4e0811a1, 21);
00279         MD5STEP(F4, a, b, c, d, md5->buffer[4]  + 0xf7537e82,  6);
00280         MD5STEP(F4, d, a, b, c, md5->buffer[11] + 0xbd3af235, 10);
00281         MD5STEP(F4, c, d, a, b, md5->buffer[2]  + 0x2ad7d2bb, 15);
00282         MD5STEP(F4, b, c, d, a, md5->buffer[9]  + 0xeb86d391, 21);
00283 
00284         /* Add the working vars back into digest state[]  */
00285         md5->digest[0] += a;
00286         md5->digest[1] += b;
00287         md5->digest[2] += c;
00288         md5->digest[3] += d;
00289 
00290         return 0;
00291     }
00292 #endif /* NEED_SOFT_MD5 */
00293 
00294 
00295 #ifndef HAVE_MD5_CUST_API
00296 static INLINE void AddMd5Length(Md5* md5, word32 len)
00297 {
00298     word32 tmp = md5->loLen;
00299     if ((md5->loLen += len) < tmp) {
00300         md5->hiLen++;                       /* carry low to high */
00301     }
00302 }
00303 
00304 static int _InitMd5(Md5* md5)
00305 {
00306     int ret = 0;
00307 
00308     md5->digest[0] = 0x67452301L;
00309     md5->digest[1] = 0xefcdab89L;
00310     md5->digest[2] = 0x98badcfeL;
00311     md5->digest[3] = 0x10325476L;
00312 
00313     md5->buffLen = 0;
00314     md5->loLen   = 0;
00315     md5->hiLen   = 0;
00316 
00317     return ret;
00318 }
00319 
00320 int wc_InitMd5_ex(Md5* md5, void* heap, int devId)
00321 {
00322     int ret = 0;
00323 
00324     if (md5 == NULL)
00325         return BAD_FUNC_ARG;
00326 
00327     md5->heap = heap;
00328 
00329     ret = _InitMd5(md5);
00330     if (ret != 0)
00331         return ret;
00332 
00333 #if defined(WOLFSSL_ASYNC_CRYPT) && defined(WC_ASYNC_ENABLE_MD5)
00334     ret = wolfAsync_DevCtxInit(&md5->asyncDev, WOLFSSL_ASYNC_MARKER_MD5,
00335                                                             md5->heap, devId);
00336 #else
00337     (void)devId;
00338 #endif
00339     return ret;
00340 }
00341 
00342 int wc_Md5Update(Md5* md5, const byte* data, word32 len)
00343 {
00344     int ret = 0;
00345     byte* local;
00346 
00347     if (md5 == NULL || (data == NULL && len > 0)) {
00348         return BAD_FUNC_ARG;
00349     }
00350 
00351 #if defined(WOLFSSL_ASYNC_CRYPT) && defined(WC_ASYNC_ENABLE_MD5)
00352     if (md5->asyncDev.marker == WOLFSSL_ASYNC_MARKER_MD5) {
00353     #if defined(HAVE_INTEL_QA)
00354         return IntelQaSymMd5(&md5->asyncDev, NULL, data, len);
00355     #endif
00356     }
00357 #endif /* WOLFSSL_ASYNC_CRYPT */
00358 
00359     /* do block size increments */
00360     local = (byte*)md5->buffer;
00361 
00362     /* check that internal buffLen is valid */
00363     if (md5->buffLen >= MD5_BLOCK_SIZE)
00364         return BUFFER_E;
00365 
00366     while (len) {
00367         word32 add = min(len, MD5_BLOCK_SIZE - md5->buffLen);
00368         XMEMCPY(&local[md5->buffLen], data, add);
00369 
00370         md5->buffLen += add;
00371         data         += add;
00372         len          -= add;
00373 
00374         if (md5->buffLen == MD5_BLOCK_SIZE) {
00375         #if defined(BIG_ENDIAN_ORDER) && !defined(FREESCALE_MMCAU_SHA)
00376             ByteReverseWords(md5->buffer, md5->buffer, MD5_BLOCK_SIZE);
00377         #endif
00378             XTRANSFORM(md5, local);
00379             AddMd5Length(md5, MD5_BLOCK_SIZE);
00380             md5->buffLen = 0;
00381         }
00382     }
00383     return ret;
00384 }
00385 
00386 int wc_Md5Final(Md5* md5, byte* hash)
00387 {
00388     byte* local;
00389 
00390     if (md5 == NULL || hash == NULL) {
00391         return BAD_FUNC_ARG;
00392     }
00393 
00394 #if defined(WOLFSSL_ASYNC_CRYPT) && defined(WC_ASYNC_ENABLE_MD5)
00395     if (md5->asyncDev.marker == WOLFSSL_ASYNC_MARKER_MD5) {
00396     #if defined(HAVE_INTEL_QA)
00397         return IntelQaSymMd5(&md5->asyncDev, hash, NULL, MD5_DIGEST_SIZE);
00398     #endif
00399     }
00400 #endif /* WOLFSSL_ASYNC_CRYPT */
00401 
00402     local = (byte*)md5->buffer;
00403 
00404     AddMd5Length(md5, md5->buffLen);  /* before adding pads */
00405     local[md5->buffLen++] = 0x80;  /* add 1 */
00406 
00407     /* pad with zeros */
00408     if (md5->buffLen > MD5_PAD_SIZE) {
00409         XMEMSET(&local[md5->buffLen], 0, MD5_BLOCK_SIZE - md5->buffLen);
00410         md5->buffLen += MD5_BLOCK_SIZE - md5->buffLen;
00411 
00412     #if defined(BIG_ENDIAN_ORDER) && !defined(FREESCALE_MMCAU_SHA)
00413         ByteReverseWords(md5->buffer, md5->buffer, MD5_BLOCK_SIZE);
00414     #endif
00415         XTRANSFORM(md5, local);
00416         md5->buffLen = 0;
00417     }
00418     XMEMSET(&local[md5->buffLen], 0, MD5_PAD_SIZE - md5->buffLen);
00419 
00420     /* put lengths in bits */
00421     md5->hiLen = (md5->loLen >> (8*sizeof(md5->loLen) - 3)) +
00422                  (md5->hiLen << 3);
00423     md5->loLen = md5->loLen << 3;
00424 
00425     /* store lengths */
00426 #if defined(BIG_ENDIAN_ORDER) && !defined(FREESCALE_MMCAU_SHA)
00427     ByteReverseWords(md5->buffer, md5->buffer, MD5_BLOCK_SIZE);
00428 #endif
00429     /* ! length ordering dependent on digest endian type ! */
00430     XMEMCPY(&local[MD5_PAD_SIZE], &md5->loLen, sizeof(word32));
00431     XMEMCPY(&local[MD5_PAD_SIZE + sizeof(word32)], &md5->hiLen, sizeof(word32));
00432 
00433     XTRANSFORM(md5, local);
00434 #ifdef BIG_ENDIAN_ORDER
00435     ByteReverseWords(md5->digest, md5->digest, MD5_DIGEST_SIZE);
00436 #endif
00437     XMEMCPY(hash, md5->digest, MD5_DIGEST_SIZE);
00438 
00439     return _InitMd5(md5); /* reset state */
00440 }
00441 #endif /* !HAVE_MD5_CUST_API */
00442 
00443 
00444 int wc_InitMd5(Md5* md5)
00445 {
00446     return wc_InitMd5_ex(md5, NULL, INVALID_DEVID);
00447 }
00448 
00449 void wc_Md5Free(Md5* md5)
00450 {
00451     if (md5 == NULL)
00452         return;
00453 #if defined(WOLFSSL_ASYNC_CRYPT) && defined(WC_ASYNC_ENABLE_MD5)
00454     wolfAsync_DevCtxFree(&md5->asyncDev, WOLFSSL_ASYNC_MARKER_MD5);
00455 #endif /* WOLFSSL_ASYNC_CRYPT */
00456 }
00457 
00458 int wc_Md5GetHash(Md5* md5, byte* hash)
00459 {
00460     int ret;
00461     Md5 tmpMd5;
00462 
00463     if (md5 == NULL || hash == NULL)
00464         return BAD_FUNC_ARG;
00465 
00466     ret = wc_Md5Copy(md5, &tmpMd5);
00467     if (ret == 0) {
00468         ret = wc_Md5Final(&tmpMd5, hash);
00469     }
00470 
00471     return ret;
00472 }
00473 
00474 int wc_Md5Copy(Md5* src, Md5* dst)
00475 {
00476     int ret = 0;
00477 
00478     if (src == NULL || dst == NULL)
00479         return BAD_FUNC_ARG;
00480 
00481     XMEMCPY(dst, src, sizeof(Md5));
00482 
00483 #ifdef WOLFSSL_ASYNC_CRYPT
00484     ret = wolfAsync_DevCopy(&src->asyncDev, &dst->asyncDev);
00485 #endif
00486 
00487     return ret;
00488 }
00489 
00490 #endif /* WOLFSSL_TI_HASH */
00491 #endif /* NO_MD5 */
00492