md5.c 11 KB
Newer Older
1 2 3
/*
 *  RFC 1321 compliant MD5 implementation
 *
Manuel Pégourié-Gonnard's avatar
Manuel Pégourié-Gonnard committed
4
 *  Copyright (C) 2006-2014, ARM Limited, All Rights Reserved
Paul Bakker's avatar
Paul Bakker committed
5
 *
6
 *  This file is part of mbed TLS (https://tls.mbed.org)
Paul Bakker's avatar
Paul Bakker committed
7
 *
8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27
 *  This program 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.
 *
 *  This program 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 02110-1301 USA.
 */
/*
 *  The MD5 algorithm was designed by Ron Rivest in 1991.
 *
 *  http://www.ietf.org/rfc/rfc1321.txt
 */

Manuel Pégourié-Gonnard's avatar
Manuel Pégourié-Gonnard committed
28
#if !defined(MBEDTLS_CONFIG_FILE)
29
#include "mbedtls/config.h"
30
#else
Manuel Pégourié-Gonnard's avatar
Manuel Pégourié-Gonnard committed
31
#include MBEDTLS_CONFIG_FILE
32
#endif
33

Manuel Pégourié-Gonnard's avatar
Manuel Pégourié-Gonnard committed
34
#if defined(MBEDTLS_MD5_C)
35

36
#include "mbedtls/md5.h"
37

38 39
#include <string.h>

Manuel Pégourié-Gonnard's avatar
Manuel Pégourié-Gonnard committed
40 41
#if defined(MBEDTLS_SELF_TEST)
#if defined(MBEDTLS_PLATFORM_C)
42
#include "mbedtls/platform.h"
43
#else
44
#include <stdio.h>
Manuel Pégourié-Gonnard's avatar
Manuel Pégourié-Gonnard committed
45 46 47
#define mbedtls_printf printf
#endif /* MBEDTLS_PLATFORM_C */
#endif /* MBEDTLS_SELF_TEST */
48

49
/* Implementation that should never be optimized out by the compiler */
Manuel Pégourié-Gonnard's avatar
Manuel Pégourié-Gonnard committed
50
static void mbedtls_zeroize( void *v, size_t n ) {
51 52 53
    volatile unsigned char *p = v; while( n-- ) *p++ = 0;
}

Manuel Pégourié-Gonnard's avatar
Manuel Pégourié-Gonnard committed
54
#if !defined(MBEDTLS_MD5_ALT)
55

56 57 58
/*
 * 32-bit integer manipulation macros (little endian)
 */
59 60
#ifndef GET_UINT32_LE
#define GET_UINT32_LE(n,b,i)                            \
61
{                                                       \
62 63 64 65
    (n) = ( (uint32_t) (b)[(i)    ]       )             \
        | ( (uint32_t) (b)[(i) + 1] <<  8 )             \
        | ( (uint32_t) (b)[(i) + 2] << 16 )             \
        | ( (uint32_t) (b)[(i) + 3] << 24 );            \
66 67 68
}
#endif

69
#ifndef PUT_UINT32_LE
70 71 72 73 74 75
#define PUT_UINT32_LE(n,b,i)                                    \
{                                                               \
    (b)[(i)    ] = (unsigned char) ( ( (n)       ) & 0xFF );    \
    (b)[(i) + 1] = (unsigned char) ( ( (n) >>  8 ) & 0xFF );    \
    (b)[(i) + 2] = (unsigned char) ( ( (n) >> 16 ) & 0xFF );    \
    (b)[(i) + 3] = (unsigned char) ( ( (n) >> 24 ) & 0xFF );    \
76 77 78
}
#endif

Manuel Pégourié-Gonnard's avatar
Manuel Pégourié-Gonnard committed
79
void mbedtls_md5_init( mbedtls_md5_context *ctx )
80
{
Manuel Pégourié-Gonnard's avatar
Manuel Pégourié-Gonnard committed
81
    memset( ctx, 0, sizeof( mbedtls_md5_context ) );
82 83
}

Manuel Pégourié-Gonnard's avatar
Manuel Pégourié-Gonnard committed
84
void mbedtls_md5_free( mbedtls_md5_context *ctx )
85 86 87 88
{
    if( ctx == NULL )
        return;

Manuel Pégourié-Gonnard's avatar
Manuel Pégourié-Gonnard committed
89
    mbedtls_zeroize( ctx, sizeof( mbedtls_md5_context ) );
90 91
}

92 93 94
/*
 * MD5 context setup
 */
Manuel Pégourié-Gonnard's avatar
Manuel Pégourié-Gonnard committed
95
void mbedtls_md5_starts( mbedtls_md5_context *ctx )
96 97 98 99 100 101 102 103 104 105
{
    ctx->total[0] = 0;
    ctx->total[1] = 0;

    ctx->state[0] = 0x67452301;
    ctx->state[1] = 0xEFCDAB89;
    ctx->state[2] = 0x98BADCFE;
    ctx->state[3] = 0x10325476;
}

Manuel Pégourié-Gonnard's avatar
Manuel Pégourié-Gonnard committed
106 107
#if !defined(MBEDTLS_MD5_PROCESS_ALT)
void mbedtls_md5_process( mbedtls_md5_context *ctx, const unsigned char data[64] )
108
{
109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126
    uint32_t X[16], A, B, C, D;

    GET_UINT32_LE( X[ 0], data,  0 );
    GET_UINT32_LE( X[ 1], data,  4 );
    GET_UINT32_LE( X[ 2], data,  8 );
    GET_UINT32_LE( X[ 3], data, 12 );
    GET_UINT32_LE( X[ 4], data, 16 );
    GET_UINT32_LE( X[ 5], data, 20 );
    GET_UINT32_LE( X[ 6], data, 24 );
    GET_UINT32_LE( X[ 7], data, 28 );
    GET_UINT32_LE( X[ 8], data, 32 );
    GET_UINT32_LE( X[ 9], data, 36 );
    GET_UINT32_LE( X[10], data, 40 );
    GET_UINT32_LE( X[11], data, 44 );
    GET_UINT32_LE( X[12], data, 48 );
    GET_UINT32_LE( X[13], data, 52 );
    GET_UINT32_LE( X[14], data, 56 );
    GET_UINT32_LE( X[15], data, 60 );
127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180

#define S(x,n) ((x << n) | ((x & 0xFFFFFFFF) >> (32 - n)))

#define P(a,b,c,d,k,s,t)                                \
{                                                       \
    a += F(b,c,d) + X[k] + t; a = S(a,s) + b;           \
}

    A = ctx->state[0];
    B = ctx->state[1];
    C = ctx->state[2];
    D = ctx->state[3];

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

    P( A, B, C, D,  0,  7, 0xD76AA478 );
    P( D, A, B, C,  1, 12, 0xE8C7B756 );
    P( C, D, A, B,  2, 17, 0x242070DB );
    P( B, C, D, A,  3, 22, 0xC1BDCEEE );
    P( A, B, C, D,  4,  7, 0xF57C0FAF );
    P( D, A, B, C,  5, 12, 0x4787C62A );
    P( C, D, A, B,  6, 17, 0xA8304613 );
    P( B, C, D, A,  7, 22, 0xFD469501 );
    P( A, B, C, D,  8,  7, 0x698098D8 );
    P( D, A, B, C,  9, 12, 0x8B44F7AF );
    P( C, D, A, B, 10, 17, 0xFFFF5BB1 );
    P( B, C, D, A, 11, 22, 0x895CD7BE );
    P( A, B, C, D, 12,  7, 0x6B901122 );
    P( D, A, B, C, 13, 12, 0xFD987193 );
    P( C, D, A, B, 14, 17, 0xA679438E );
    P( B, C, D, A, 15, 22, 0x49B40821 );

#undef F

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

    P( A, B, C, D,  1,  5, 0xF61E2562 );
    P( D, A, B, C,  6,  9, 0xC040B340 );
    P( C, D, A, B, 11, 14, 0x265E5A51 );
    P( B, C, D, A,  0, 20, 0xE9B6C7AA );
    P( A, B, C, D,  5,  5, 0xD62F105D );
    P( D, A, B, C, 10,  9, 0x02441453 );
    P( C, D, A, B, 15, 14, 0xD8A1E681 );
    P( B, C, D, A,  4, 20, 0xE7D3FBC8 );
    P( A, B, C, D,  9,  5, 0x21E1CDE6 );
    P( D, A, B, C, 14,  9, 0xC33707D6 );
    P( C, D, A, B,  3, 14, 0xF4D50D87 );
    P( B, C, D, A,  8, 20, 0x455A14ED );
    P( A, B, C, D, 13,  5, 0xA9E3E905 );
    P( D, A, B, C,  2,  9, 0xFCEFA3F8 );
    P( C, D, A, B,  7, 14, 0x676F02D9 );
    P( B, C, D, A, 12, 20, 0x8D2A4C8A );

#undef F
181

182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228
#define F(x,y,z) (x ^ y ^ z)

    P( A, B, C, D,  5,  4, 0xFFFA3942 );
    P( D, A, B, C,  8, 11, 0x8771F681 );
    P( C, D, A, B, 11, 16, 0x6D9D6122 );
    P( B, C, D, A, 14, 23, 0xFDE5380C );
    P( A, B, C, D,  1,  4, 0xA4BEEA44 );
    P( D, A, B, C,  4, 11, 0x4BDECFA9 );
    P( C, D, A, B,  7, 16, 0xF6BB4B60 );
    P( B, C, D, A, 10, 23, 0xBEBFBC70 );
    P( A, B, C, D, 13,  4, 0x289B7EC6 );
    P( D, A, B, C,  0, 11, 0xEAA127FA );
    P( C, D, A, B,  3, 16, 0xD4EF3085 );
    P( B, C, D, A,  6, 23, 0x04881D05 );
    P( A, B, C, D,  9,  4, 0xD9D4D039 );
    P( D, A, B, C, 12, 11, 0xE6DB99E5 );
    P( C, D, A, B, 15, 16, 0x1FA27CF8 );
    P( B, C, D, A,  2, 23, 0xC4AC5665 );

#undef F

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

    P( A, B, C, D,  0,  6, 0xF4292244 );
    P( D, A, B, C,  7, 10, 0x432AFF97 );
    P( C, D, A, B, 14, 15, 0xAB9423A7 );
    P( B, C, D, A,  5, 21, 0xFC93A039 );
    P( A, B, C, D, 12,  6, 0x655B59C3 );
    P( D, A, B, C,  3, 10, 0x8F0CCC92 );
    P( C, D, A, B, 10, 15, 0xFFEFF47D );
    P( B, C, D, A,  1, 21, 0x85845DD1 );
    P( A, B, C, D,  8,  6, 0x6FA87E4F );
    P( D, A, B, C, 15, 10, 0xFE2CE6E0 );
    P( C, D, A, B,  6, 15, 0xA3014314 );
    P( B, C, D, A, 13, 21, 0x4E0811A1 );
    P( A, B, C, D,  4,  6, 0xF7537E82 );
    P( D, A, B, C, 11, 10, 0xBD3AF235 );
    P( C, D, A, B,  2, 15, 0x2AD7D2BB );
    P( B, C, D, A,  9, 21, 0xEB86D391 );

#undef F

    ctx->state[0] += A;
    ctx->state[1] += B;
    ctx->state[2] += C;
    ctx->state[3] += D;
}
Manuel Pégourié-Gonnard's avatar
Manuel Pégourié-Gonnard committed
229
#endif /* !MBEDTLS_MD5_PROCESS_ALT */
230 231 232 233

/*
 * MD5 process buffer
 */
Manuel Pégourié-Gonnard's avatar
Manuel Pégourié-Gonnard committed
234
void mbedtls_md5_update( mbedtls_md5_context *ctx, const unsigned char *input, size_t ilen )
235
{
236
    size_t fill;
237
    uint32_t left;
238

239
    if( ilen == 0 )
240 241 242 243 244
        return;

    left = ctx->total[0] & 0x3F;
    fill = 64 - left;

245
    ctx->total[0] += (uint32_t) ilen;
246 247
    ctx->total[0] &= 0xFFFFFFFF;

248
    if( ctx->total[0] < (uint32_t) ilen )
249 250 251 252
        ctx->total[1]++;

    if( left && ilen >= fill )
    {
253
        memcpy( (void *) (ctx->buffer + left), input, fill );
Manuel Pégourié-Gonnard's avatar
Manuel Pégourié-Gonnard committed
254
        mbedtls_md5_process( ctx, ctx->buffer );
255 256 257 258 259 260 261
        input += fill;
        ilen  -= fill;
        left = 0;
    }

    while( ilen >= 64 )
    {
Manuel Pégourié-Gonnard's avatar
Manuel Pégourié-Gonnard committed
262
        mbedtls_md5_process( ctx, input );
263 264 265 266 267 268
        input += 64;
        ilen  -= 64;
    }

    if( ilen > 0 )
    {
269
        memcpy( (void *) (ctx->buffer + left), input, ilen );
270 271 272 273 274 275 276 277 278 279 280 281 282 283
    }
}

static const unsigned char md5_padding[64] =
{
 0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
};

/*
 * MD5 final digest
 */
Manuel Pégourié-Gonnard's avatar
Manuel Pégourié-Gonnard committed
284
void mbedtls_md5_finish( mbedtls_md5_context *ctx, unsigned char output[16] )
285
{
286 287
    uint32_t last, padn;
    uint32_t high, low;
288 289 290 291 292 293
    unsigned char msglen[8];

    high = ( ctx->total[0] >> 29 )
         | ( ctx->total[1] <<  3 );
    low  = ( ctx->total[0] <<  3 );

294 295
    PUT_UINT32_LE( low,  msglen, 0 );
    PUT_UINT32_LE( high, msglen, 4 );
296 297 298 299

    last = ctx->total[0] & 0x3F;
    padn = ( last < 56 ) ? ( 56 - last ) : ( 120 - last );

Manuel Pégourié-Gonnard's avatar
Manuel Pégourié-Gonnard committed
300 301
    mbedtls_md5_update( ctx, md5_padding, padn );
    mbedtls_md5_update( ctx, msglen, 8 );
302

303 304 305 306
    PUT_UINT32_LE( ctx->state[0], output,  0 );
    PUT_UINT32_LE( ctx->state[1], output,  4 );
    PUT_UINT32_LE( ctx->state[2], output,  8 );
    PUT_UINT32_LE( ctx->state[3], output, 12 );
307 308
}

Manuel Pégourié-Gonnard's avatar
Manuel Pégourié-Gonnard committed
309
#endif /* !MBEDTLS_MD5_ALT */
310

311 312 313
/*
 * output = MD5( input buffer )
 */
Manuel Pégourié-Gonnard's avatar
Manuel Pégourié-Gonnard committed
314
void mbedtls_md5( const unsigned char *input, size_t ilen, unsigned char output[16] )
315
{
Manuel Pégourié-Gonnard's avatar
Manuel Pégourié-Gonnard committed
316
    mbedtls_md5_context ctx;
317

Manuel Pégourié-Gonnard's avatar
Manuel Pégourié-Gonnard committed
318 319 320 321 322
    mbedtls_md5_init( &ctx );
    mbedtls_md5_starts( &ctx );
    mbedtls_md5_update( &ctx, input, ilen );
    mbedtls_md5_finish( &ctx, output );
    mbedtls_md5_free( &ctx );
323 324
}

Manuel Pégourié-Gonnard's avatar
Manuel Pégourié-Gonnard committed
325
#if defined(MBEDTLS_SELF_TEST)
326 327 328
/*
 * RFC 1321 test vectors
 */
329
static const unsigned char md5_test_buf[7][81] =
330
{
331
    { "" },
332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366
    { "a" },
    { "abc" },
    { "message digest" },
    { "abcdefghijklmnopqrstuvwxyz" },
    { "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789" },
    { "12345678901234567890123456789012345678901234567890123456789012" \
      "345678901234567890" }
};

static const int md5_test_buflen[7] =
{
    0, 1, 3, 14, 26, 62, 80
};

static const unsigned char md5_test_sum[7][16] =
{
    { 0xD4, 0x1D, 0x8C, 0xD9, 0x8F, 0x00, 0xB2, 0x04,
      0xE9, 0x80, 0x09, 0x98, 0xEC, 0xF8, 0x42, 0x7E },
    { 0x0C, 0xC1, 0x75, 0xB9, 0xC0, 0xF1, 0xB6, 0xA8,
      0x31, 0xC3, 0x99, 0xE2, 0x69, 0x77, 0x26, 0x61 },
    { 0x90, 0x01, 0x50, 0x98, 0x3C, 0xD2, 0x4F, 0xB0,
      0xD6, 0x96, 0x3F, 0x7D, 0x28, 0xE1, 0x7F, 0x72 },
    { 0xF9, 0x6B, 0x69, 0x7D, 0x7C, 0xB7, 0x93, 0x8D,
      0x52, 0x5A, 0x2F, 0x31, 0xAA, 0xF1, 0x61, 0xD0 },
    { 0xC3, 0xFC, 0xD3, 0xD7, 0x61, 0x92, 0xE4, 0x00,
      0x7D, 0xFB, 0x49, 0x6C, 0xCA, 0x67, 0xE1, 0x3B },
    { 0xD1, 0x74, 0xAB, 0x98, 0xD2, 0x77, 0xD9, 0xF5,
      0xA5, 0x61, 0x1C, 0x2C, 0x9F, 0x41, 0x9D, 0x9F },
    { 0x57, 0xED, 0xF4, 0xA2, 0x2B, 0xE3, 0xC9, 0x55,
      0xAC, 0x49, 0xDA, 0x2E, 0x21, 0x07, 0xB6, 0x7A }
};

/*
 * Checkup routine
 */
Manuel Pégourié-Gonnard's avatar
Manuel Pégourié-Gonnard committed
367
int mbedtls_md5_self_test( int verbose )
368
{
369
    int i;
370 371 372 373 374
    unsigned char md5sum[16];

    for( i = 0; i < 7; i++ )
    {
        if( verbose != 0 )
Manuel Pégourié-Gonnard's avatar
Manuel Pégourié-Gonnard committed
375
            mbedtls_printf( "  MD5 test #%d: ", i + 1 );
376

Manuel Pégourié-Gonnard's avatar
Manuel Pégourié-Gonnard committed
377
        mbedtls_md5( md5_test_buf[i], md5_test_buflen[i], md5sum );
378 379 380 381

        if( memcmp( md5sum, md5_test_sum[i], 16 ) != 0 )
        {
            if( verbose != 0 )
Manuel Pégourié-Gonnard's avatar
Manuel Pégourié-Gonnard committed
382
                mbedtls_printf( "failed\n" );
383 384 385 386 387

            return( 1 );
        }

        if( verbose != 0 )
Manuel Pégourié-Gonnard's avatar
Manuel Pégourié-Gonnard committed
388
            mbedtls_printf( "passed\n" );
389 390 391
    }

    if( verbose != 0 )
Manuel Pégourié-Gonnard's avatar
Manuel Pégourié-Gonnard committed
392
        mbedtls_printf( "\n" );
393 394 395 396

    return( 0 );
}

Manuel Pégourié-Gonnard's avatar
Manuel Pégourié-Gonnard committed
397
#endif /* MBEDTLS_SELF_TEST */
398

Manuel Pégourié-Gonnard's avatar
Manuel Pégourié-Gonnard committed
399
#endif /* MBEDTLS_MD5_C */