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 #else
00035 
00036 #ifdef WOLFSSL_PIC32MZ_HASH
00037 #define wc_InitMd5   wc_InitMd5_sw
00038 #define wc_Md5Update wc_Md5Update_sw
00039 #define wc_Md5Final  wc_Md5Final_sw
00040 #endif
00041 
00042 #include <wolfssl/wolfcrypt/md5.h>
00043 #include <wolfssl/wolfcrypt/error-crypt.h>
00044 
00045 #ifdef NO_INLINE
00046     #include <wolfssl/wolfcrypt/misc.h>
00047 #else
00048     #include <wolfcrypt/src/misc.c>
00049 #endif
00050 
00051 #ifdef FREESCALE_MMCAU
00052     #include "cau_api.h"
00053     #define XTRANSFORM(S,B)  Transform((S), (B))
00054 #else
00055     #define XTRANSFORM(S,B)  Transform((S))
00056 #endif
00057 
00058 
00059 #ifdef STM32F2_HASH
00060     /*
00061      * STM32F2 hardware MD5 support through the STM32F2 standard peripheral
00062      * library. Documentation located in STM32F2xx Standard Peripheral Library
00063      * document (See note in README).
00064      */
00065     #include "stm32f2xx.h"
00066 
00067     void wc_InitMd5(Md5* md5)
00068     {
00069         /* STM32F2 struct notes:
00070          * md5->buffer  = first 4 bytes used to hold partial block if needed 
00071          * md5->buffLen = num bytes currently stored in md5->buffer
00072          * md5->loLen   = num bytes that have been written to STM32 FIFO
00073          */
00074         XMEMSET(md5->buffer, 0, MD5_REG_SIZE);
00075             
00076         md5->buffLen = 0;
00077         md5->loLen = 0;
00078 
00079         /* initialize HASH peripheral */
00080         HASH_DeInit();
00081 
00082         /* configure algo used, algo mode, datatype */
00083         HASH->CR &= ~ (HASH_CR_ALGO | HASH_CR_DATATYPE | HASH_CR_MODE);
00084         HASH->CR |= (HASH_AlgoSelection_MD5 | HASH_AlgoMode_HASH 
00085                  | HASH_DataType_8b);
00086 
00087         /* reset HASH processor */
00088         HASH->CR |= HASH_CR_INIT;
00089     }
00090 
00091     void wc_Md5Update(Md5* md5, const byte* data, word32 len)
00092     {
00093         word32 i = 0;
00094         word32 fill = 0;
00095         word32 diff = 0;
00096 
00097         /* if saved partial block is available */
00098         if (md5->buffLen > 0) {
00099             fill = 4 - md5->buffLen;
00100 
00101             /* if enough data to fill, fill and push to FIFO */
00102             if (fill <= len) {
00103                 XMEMCPY((byte*)md5->buffer + md5->buffLen, data, fill);
00104                 HASH_DataIn(*(uint32_t*)md5->buffer);
00105 
00106                 data += fill;
00107                 len -= fill;
00108                 md5->loLen += 4;
00109                 md5->buffLen = 0;
00110             } else {
00111                 /* append partial to existing stored block */
00112                 XMEMCPY((byte*)md5->buffer + md5->buffLen, data, len);
00113                 md5->buffLen += len;
00114                 return;
00115             }
00116         }
00117 
00118         /* write input block in the IN FIFO */
00119         for (i = 0; i < len; i += 4)
00120         {
00121             diff = len - i;
00122             if (diff < 4) {
00123                 /* store incomplete last block, not yet in FIFO */
00124                 XMEMSET(md5->buffer, 0, MD5_REG_SIZE);
00125                 XMEMCPY((byte*)md5->buffer, data, diff);
00126                 md5->buffLen = diff;
00127             } else {
00128                 HASH_DataIn(*(uint32_t*)data);
00129                 data+=4;
00130             }
00131         }
00132 
00133         /* keep track of total data length thus far */
00134         md5->loLen += (len - md5->buffLen);
00135     }
00136 
00137     void wc_Md5Final(Md5* md5, byte* hash)
00138     {
00139         __IO uint16_t nbvalidbitsdata = 0;
00140 
00141         /* finish reading any trailing bytes into FIFO */
00142         if (md5->buffLen > 0) {
00143             HASH_DataIn(*(uint32_t*)md5->buffer);
00144             md5->loLen += md5->buffLen;
00145         }
00146 
00147         /* calculate number of valid bits in last word of input data */
00148         nbvalidbitsdata = 8 * (md5->loLen % MD5_REG_SIZE);
00149 
00150         /* configure number of valid bits in last word of the data */
00151         HASH_SetLastWordValidBitsNbr(nbvalidbitsdata);
00152 
00153         /* start HASH processor */
00154         HASH_StartDigest();
00155 
00156         /* wait until Busy flag == RESET */
00157         while (HASH_GetFlagStatus(HASH_FLAG_BUSY) != RESET) {}
00158         
00159         /* read message digest */
00160         md5->digest[0] = HASH->HR[0];
00161         md5->digest[1] = HASH->HR[1];
00162         md5->digest[2] = HASH->HR[2];
00163         md5->digest[3] = HASH->HR[3];
00164 
00165         ByteReverseWords(md5->digest, md5->digest, MD5_DIGEST_SIZE);
00166 
00167         XMEMCPY(hash, md5->digest, MD5_DIGEST_SIZE);
00168 
00169         wc_InitMd5(md5);  /* reset state */
00170     }
00171 
00172 #else /* CTaoCrypt software implementation */
00173 
00174 #ifndef WOLFSSL_HAVE_MIN
00175 #define WOLFSSL_HAVE_MIN
00176 
00177     static INLINE word32 min(word32 a, word32 b)
00178     {
00179         return a > b ? b : a;
00180     }
00181 
00182 #endif /* WOLFSSL_HAVE_MIN */
00183 
00184 void wc_InitMd5(Md5* md5)
00185 {
00186     md5->digest[0] = 0x67452301L;
00187     md5->digest[1] = 0xefcdab89L;
00188     md5->digest[2] = 0x98badcfeL;
00189     md5->digest[3] = 0x10325476L;
00190 
00191     md5->buffLen = 0;
00192     md5->loLen   = 0;
00193     md5->hiLen   = 0;
00194 }
00195 
00196 #ifdef FREESCALE_MMCAU
00197 static int Transform(Md5* md5, byte* data)
00198 {
00199     int ret = wolfSSL_CryptHwMutexLock();
00200     if(ret == 0) {
00201         cau_md5_hash_n(data, 1, (unsigned char*)md5->digest);
00202         wolfSSL_CryptHwMutexUnLock();
00203     }
00204     return ret;
00205 }
00206 #endif /* FREESCALE_MMCAU */
00207 
00208 #ifndef FREESCALE_MMCAU
00209 
00210 static void Transform(Md5* md5)
00211 {
00212 #define F1(x, y, z) (z ^ (x & (y ^ z)))
00213 #define F2(x, y, z) F1(z, x, y)
00214 #define F3(x, y, z) (x ^ y ^ z)
00215 #define F4(x, y, z) (y ^ (x | ~z))
00216 
00217 #define MD5STEP(f, w, x, y, z, data, s) \
00218     w = rotlFixed(w + f(x, y, z) + data, s) + x
00219 
00220     /* Copy context->state[] to working vars  */
00221     word32 a = md5->digest[0];
00222     word32 b = md5->digest[1];
00223     word32 c = md5->digest[2];
00224     word32 d = md5->digest[3];
00225 
00226     MD5STEP(F1, a, b, c, d, md5->buffer[0]  + 0xd76aa478,  7);
00227     MD5STEP(F1, d, a, b, c, md5->buffer[1]  + 0xe8c7b756, 12);
00228     MD5STEP(F1, c, d, a, b, md5->buffer[2]  + 0x242070db, 17);
00229     MD5STEP(F1, b, c, d, a, md5->buffer[3]  + 0xc1bdceee, 22);
00230     MD5STEP(F1, a, b, c, d, md5->buffer[4]  + 0xf57c0faf,  7);
00231     MD5STEP(F1, d, a, b, c, md5->buffer[5]  + 0x4787c62a, 12);
00232     MD5STEP(F1, c, d, a, b, md5->buffer[6]  + 0xa8304613, 17);
00233     MD5STEP(F1, b, c, d, a, md5->buffer[7]  + 0xfd469501, 22);
00234     MD5STEP(F1, a, b, c, d, md5->buffer[8]  + 0x698098d8,  7);
00235     MD5STEP(F1, d, a, b, c, md5->buffer[9]  + 0x8b44f7af, 12);
00236     MD5STEP(F1, c, d, a, b, md5->buffer[10] + 0xffff5bb1, 17);
00237     MD5STEP(F1, b, c, d, a, md5->buffer[11] + 0x895cd7be, 22);
00238     MD5STEP(F1, a, b, c, d, md5->buffer[12] + 0x6b901122,  7);
00239     MD5STEP(F1, d, a, b, c, md5->buffer[13] + 0xfd987193, 12);
00240     MD5STEP(F1, c, d, a, b, md5->buffer[14] + 0xa679438e, 17);
00241     MD5STEP(F1, b, c, d, a, md5->buffer[15] + 0x49b40821, 22);
00242 
00243     MD5STEP(F2, a, b, c, d, md5->buffer[1]  + 0xf61e2562,  5);
00244     MD5STEP(F2, d, a, b, c, md5->buffer[6]  + 0xc040b340,  9);
00245     MD5STEP(F2, c, d, a, b, md5->buffer[11] + 0x265e5a51, 14);
00246     MD5STEP(F2, b, c, d, a, md5->buffer[0]  + 0xe9b6c7aa, 20);
00247     MD5STEP(F2, a, b, c, d, md5->buffer[5]  + 0xd62f105d,  5);
00248     MD5STEP(F2, d, a, b, c, md5->buffer[10] + 0x02441453,  9);
00249     MD5STEP(F2, c, d, a, b, md5->buffer[15] + 0xd8a1e681, 14);
00250     MD5STEP(F2, b, c, d, a, md5->buffer[4]  + 0xe7d3fbc8, 20);
00251     MD5STEP(F2, a, b, c, d, md5->buffer[9]  + 0x21e1cde6,  5);
00252     MD5STEP(F2, d, a, b, c, md5->buffer[14] + 0xc33707d6,  9);
00253     MD5STEP(F2, c, d, a, b, md5->buffer[3]  + 0xf4d50d87, 14);
00254     MD5STEP(F2, b, c, d, a, md5->buffer[8]  + 0x455a14ed, 20);
00255     MD5STEP(F2, a, b, c, d, md5->buffer[13] + 0xa9e3e905,  5);
00256     MD5STEP(F2, d, a, b, c, md5->buffer[2]  + 0xfcefa3f8,  9);
00257     MD5STEP(F2, c, d, a, b, md5->buffer[7]  + 0x676f02d9, 14);
00258     MD5STEP(F2, b, c, d, a, md5->buffer[12] + 0x8d2a4c8a, 20);
00259 
00260     MD5STEP(F3, a, b, c, d, md5->buffer[5]  + 0xfffa3942,  4);
00261     MD5STEP(F3, d, a, b, c, md5->buffer[8]  + 0x8771f681, 11);
00262     MD5STEP(F3, c, d, a, b, md5->buffer[11] + 0x6d9d6122, 16);
00263     MD5STEP(F3, b, c, d, a, md5->buffer[14] + 0xfde5380c, 23);
00264     MD5STEP(F3, a, b, c, d, md5->buffer[1]  + 0xa4beea44,  4);
00265     MD5STEP(F3, d, a, b, c, md5->buffer[4]  + 0x4bdecfa9, 11);
00266     MD5STEP(F3, c, d, a, b, md5->buffer[7]  + 0xf6bb4b60, 16);
00267     MD5STEP(F3, b, c, d, a, md5->buffer[10] + 0xbebfbc70, 23);
00268     MD5STEP(F3, a, b, c, d, md5->buffer[13] + 0x289b7ec6,  4);
00269     MD5STEP(F3, d, a, b, c, md5->buffer[0]  + 0xeaa127fa, 11);
00270     MD5STEP(F3, c, d, a, b, md5->buffer[3]  + 0xd4ef3085, 16);
00271     MD5STEP(F3, b, c, d, a, md5->buffer[6]  + 0x04881d05, 23);
00272     MD5STEP(F3, a, b, c, d, md5->buffer[9]  + 0xd9d4d039,  4);
00273     MD5STEP(F3, d, a, b, c, md5->buffer[12] + 0xe6db99e5, 11);
00274     MD5STEP(F3, c, d, a, b, md5->buffer[15] + 0x1fa27cf8, 16);
00275     MD5STEP(F3, b, c, d, a, md5->buffer[2]  + 0xc4ac5665, 23);
00276 
00277     MD5STEP(F4, a, b, c, d, md5->buffer[0]  + 0xf4292244,  6);
00278     MD5STEP(F4, d, a, b, c, md5->buffer[7]  + 0x432aff97, 10);
00279     MD5STEP(F4, c, d, a, b, md5->buffer[14] + 0xab9423a7, 15);
00280     MD5STEP(F4, b, c, d, a, md5->buffer[5]  + 0xfc93a039, 21);
00281     MD5STEP(F4, a, b, c, d, md5->buffer[12] + 0x655b59c3,  6);
00282     MD5STEP(F4, d, a, b, c, md5->buffer[3]  + 0x8f0ccc92, 10);
00283     MD5STEP(F4, c, d, a, b, md5->buffer[10] + 0xffeff47d, 15);
00284     MD5STEP(F4, b, c, d, a, md5->buffer[1]  + 0x85845dd1, 21);
00285     MD5STEP(F4, a, b, c, d, md5->buffer[8]  + 0x6fa87e4f,  6);
00286     MD5STEP(F4, d, a, b, c, md5->buffer[15] + 0xfe2ce6e0, 10);
00287     MD5STEP(F4, c, d, a, b, md5->buffer[6]  + 0xa3014314, 15);
00288     MD5STEP(F4, b, c, d, a, md5->buffer[13] + 0x4e0811a1, 21);
00289     MD5STEP(F4, a, b, c, d, md5->buffer[4]  + 0xf7537e82,  6);
00290     MD5STEP(F4, d, a, b, c, md5->buffer[11] + 0xbd3af235, 10);
00291     MD5STEP(F4, c, d, a, b, md5->buffer[2]  + 0x2ad7d2bb, 15);
00292     MD5STEP(F4, b, c, d, a, md5->buffer[9]  + 0xeb86d391, 21);
00293     
00294     /* Add the working vars back into digest state[]  */
00295     md5->digest[0] += a;
00296     md5->digest[1] += b;
00297     md5->digest[2] += c;
00298     md5->digest[3] += d;
00299 }
00300 
00301 #endif /* FREESCALE_MMCAU */
00302 
00303 
00304 static INLINE void AddLength(Md5* md5, word32 len)
00305 {
00306     word32 tmp = md5->loLen;
00307     if ( (md5->loLen += len) < tmp)
00308         md5->hiLen++;                       /* carry low to high */
00309 }
00310 
00311 
00312 void wc_Md5Update(Md5* md5, const byte* data, word32 len)
00313 {
00314     /* do block size increments */
00315     byte* local = (byte*)md5->buffer;
00316 
00317     while (len) {
00318         word32 add = min(len, MD5_BLOCK_SIZE - md5->buffLen);
00319         XMEMCPY(&local[md5->buffLen], data, add);
00320 
00321         md5->buffLen += add;
00322         data         += add;
00323         len          -= add;
00324 
00325         if (md5->buffLen == MD5_BLOCK_SIZE) {
00326             #if defined(BIG_ENDIAN_ORDER) && !defined(FREESCALE_MMCAU)
00327                 ByteReverseWords(md5->buffer, md5->buffer, MD5_BLOCK_SIZE);
00328             #endif
00329             XTRANSFORM(md5, local);
00330             AddLength(md5, MD5_BLOCK_SIZE);
00331             md5->buffLen = 0;
00332         }
00333     }
00334 }
00335 
00336 
00337 void wc_Md5Final(Md5* md5, byte* hash)
00338 {
00339     byte* local = (byte*)md5->buffer;
00340 
00341     AddLength(md5, md5->buffLen);  /* before adding pads */
00342 
00343     local[md5->buffLen++] = 0x80;  /* add 1 */
00344 
00345     /* pad with zeros */
00346     if (md5->buffLen > MD5_PAD_SIZE) {
00347         XMEMSET(&local[md5->buffLen], 0, MD5_BLOCK_SIZE - md5->buffLen);
00348         md5->buffLen += MD5_BLOCK_SIZE - md5->buffLen;
00349 
00350         #if defined(BIG_ENDIAN_ORDER) && !defined(FREESCALE_MMCAU)
00351             ByteReverseWords(md5->buffer, md5->buffer, MD5_BLOCK_SIZE);
00352         #endif
00353         XTRANSFORM(md5, local);
00354         md5->buffLen = 0;
00355     }
00356     XMEMSET(&local[md5->buffLen], 0, MD5_PAD_SIZE - md5->buffLen);
00357    
00358     /* put lengths in bits */
00359     md5->hiLen = (md5->loLen >> (8*sizeof(md5->loLen) - 3)) + 
00360                  (md5->hiLen << 3);
00361     md5->loLen = md5->loLen << 3;
00362 
00363     /* store lengths */
00364     #if defined(BIG_ENDIAN_ORDER) && !defined(FREESCALE_MMCAU)
00365         ByteReverseWords(md5->buffer, md5->buffer, MD5_BLOCK_SIZE);
00366     #endif
00367     /* ! length ordering dependent on digest endian type ! */
00368     XMEMCPY(&local[MD5_PAD_SIZE], &md5->loLen, sizeof(word32));
00369     XMEMCPY(&local[MD5_PAD_SIZE + sizeof(word32)], &md5->hiLen, sizeof(word32));
00370 
00371     XTRANSFORM(md5, local);
00372     #ifdef BIG_ENDIAN_ORDER
00373         ByteReverseWords(md5->digest, md5->digest, MD5_DIGEST_SIZE);
00374     #endif
00375     XMEMCPY(hash, md5->digest, MD5_DIGEST_SIZE);
00376 
00377     wc_InitMd5(md5);  /* reset state */
00378 }
00379 
00380 #endif /* STM32F2_HASH */
00381 
00382 
00383 int wc_Md5Hash(const byte* data, word32 len, byte* hash)
00384 {
00385 #ifdef WOLFSSL_SMALL_STACK
00386     Md5* md5;
00387 #else
00388     Md5 md5[1];
00389 #endif
00390 
00391 #ifdef WOLFSSL_SMALL_STACK
00392     md5 = (Md5*)XMALLOC(sizeof(Md5), NULL, DYNAMIC_TYPE_TMP_BUFFER);
00393     if (md5 == NULL)
00394         return MEMORY_E;
00395 #endif
00396 
00397     wc_InitMd5(md5);
00398     wc_Md5Update(md5, data, len);
00399     wc_Md5Final(md5, hash);
00400 
00401 #ifdef WOLFSSL_SMALL_STACK
00402     XFREE(md5, NULL, DYNAMIC_TYPE_TMP_BUFFER);
00403 #endif
00404 
00405     return 0;
00406 }
00407 
00408 #endif /* WOLFSSL_TI_HASH */
00409 
00410 #endif /* NO_MD5 */
00411