md5.c

00001 /*
00002  *  RFC 1321 compliant MD5 implementation
00003  *
00004  *  Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
00005  *  SPDX-License-Identifier: Apache-2.0
00006  *
00007  *  Licensed under the Apache License, Version 2.0 (the "License"); you may
00008  *  not use this file except in compliance with the License.
00009  *  You may obtain a copy of the License at
00010  *
00011  *  http://www.apache.org/licenses/LICENSE-2.0
00012  *
00013  *  Unless required by applicable law or agreed to in writing, software
00014  *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
00015  *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00016  *  See the License for the specific language governing permissions and
00017  *  limitations under the License.
00018  *
00019  *  This file is part of mbed TLS (https://tls.mbed.org)
00020  */
00021 /*
00022  *  The MD5 algorithm was designed by Ron Rivest in 1991.
00023  *
00024  *  http://www.ietf.org/rfc/rfc1321.txt
00025  */
00026 
00027 #if !defined(MBEDTLS_CONFIG_FILE)
00028 #include "mbedtls/config.h"
00029 #else
00030 #include MBEDTLS_CONFIG_FILE
00031 #endif
00032 
00033 #if defined(MBEDTLS_MD5_C)
00034 
00035 #include "mbedtls/md5.h"
00036 #include "mbedtls/platform_util.h"
00037 
00038 #include <string.h>
00039 
00040 #if defined(MBEDTLS_SELF_TEST)
00041 #if defined(MBEDTLS_PLATFORM_C)
00042 #include "mbedtls/platform.h"
00043 #else
00044 #include <stdio.h>
00045 #define mbedtls_printf printf
00046 #endif /* MBEDTLS_PLATFORM_C */
00047 #endif /* MBEDTLS_SELF_TEST */
00048 
00049 #if !defined(MBEDTLS_MD5_ALT)
00050 
00051 /*
00052  * 32-bit integer manipulation macros (little endian)
00053  */
00054 #ifndef GET_UINT32_LE
00055 #define GET_UINT32_LE(n,b,i)                            \
00056 {                                                       \
00057     (n) = ( (uint32_t) (b)[(i)    ]       )             \
00058         | ( (uint32_t) (b)[(i) + 1] <<  8 )             \
00059         | ( (uint32_t) (b)[(i) + 2] << 16 )             \
00060         | ( (uint32_t) (b)[(i) + 3] << 24 );            \
00061 }
00062 #endif
00063 
00064 #ifndef PUT_UINT32_LE
00065 #define PUT_UINT32_LE(n,b,i)                                    \
00066 {                                                               \
00067     (b)[(i)    ] = (unsigned char) ( ( (n)       ) & 0xFF );    \
00068     (b)[(i) + 1] = (unsigned char) ( ( (n) >>  8 ) & 0xFF );    \
00069     (b)[(i) + 2] = (unsigned char) ( ( (n) >> 16 ) & 0xFF );    \
00070     (b)[(i) + 3] = (unsigned char) ( ( (n) >> 24 ) & 0xFF );    \
00071 }
00072 #endif
00073 
00074 void mbedtls_md5_init( mbedtls_md5_context *ctx )
00075 {
00076     memset( ctx, 0, sizeof( mbedtls_md5_context ) );
00077 }
00078 
00079 void mbedtls_md5_free( mbedtls_md5_context *ctx )
00080 {
00081     if( ctx == NULL )
00082         return;
00083 
00084     mbedtls_platform_zeroize( ctx, sizeof( mbedtls_md5_context ) );
00085 }
00086 
00087 void mbedtls_md5_clone( mbedtls_md5_context *dst,
00088                         const mbedtls_md5_context *src )
00089 {
00090     *dst = *src;
00091 }
00092 
00093 /*
00094  * MD5 context setup
00095  */
00096 int mbedtls_md5_starts_ret( mbedtls_md5_context *ctx )
00097 {
00098     ctx->total [0] = 0;
00099     ctx->total [1] = 0;
00100 
00101     ctx->state [0] = 0x67452301;
00102     ctx->state [1] = 0xEFCDAB89;
00103     ctx->state [2] = 0x98BADCFE;
00104     ctx->state [3] = 0x10325476;
00105 
00106     return( 0 );
00107 }
00108 
00109 #if !defined(MBEDTLS_DEPRECATED_REMOVED)
00110 void mbedtls_md5_starts( mbedtls_md5_context *ctx )
00111 {
00112     mbedtls_md5_starts_ret( ctx );
00113 }
00114 #endif
00115 
00116 #if !defined(MBEDTLS_MD5_PROCESS_ALT)
00117 int mbedtls_internal_md5_process( mbedtls_md5_context *ctx,
00118                                   const unsigned char data[64] )
00119 {
00120     uint32_t X[16], A, B, C, D;
00121 
00122     GET_UINT32_LE( X[ 0], data,  0 );
00123     GET_UINT32_LE( X[ 1], data,  4 );
00124     GET_UINT32_LE( X[ 2], data,  8 );
00125     GET_UINT32_LE( X[ 3], data, 12 );
00126     GET_UINT32_LE( X[ 4], data, 16 );
00127     GET_UINT32_LE( X[ 5], data, 20 );
00128     GET_UINT32_LE( X[ 6], data, 24 );
00129     GET_UINT32_LE( X[ 7], data, 28 );
00130     GET_UINT32_LE( X[ 8], data, 32 );
00131     GET_UINT32_LE( X[ 9], data, 36 );
00132     GET_UINT32_LE( X[10], data, 40 );
00133     GET_UINT32_LE( X[11], data, 44 );
00134     GET_UINT32_LE( X[12], data, 48 );
00135     GET_UINT32_LE( X[13], data, 52 );
00136     GET_UINT32_LE( X[14], data, 56 );
00137     GET_UINT32_LE( X[15], data, 60 );
00138 
00139 #define S(x,n) ((x << n) | ((x & 0xFFFFFFFF) >> (32 - n)))
00140 
00141 #define P(a,b,c,d,k,s,t)                                \
00142 {                                                       \
00143     a += F(b,c,d) + X[k] + t; a = S(a,s) + b;           \
00144 }
00145 
00146     A = ctx->state [0];
00147     B = ctx->state [1];
00148     C = ctx->state [2];
00149     D = ctx->state [3];
00150 
00151 #define F(x,y,z) (z ^ (x & (y ^ z)))
00152 
00153     P( A, B, C, D,  0,  7, 0xD76AA478 );
00154     P( D, A, B, C,  1, 12, 0xE8C7B756 );
00155     P( C, D, A, B,  2, 17, 0x242070DB );
00156     P( B, C, D, A,  3, 22, 0xC1BDCEEE );
00157     P( A, B, C, D,  4,  7, 0xF57C0FAF );
00158     P( D, A, B, C,  5, 12, 0x4787C62A );
00159     P( C, D, A, B,  6, 17, 0xA8304613 );
00160     P( B, C, D, A,  7, 22, 0xFD469501 );
00161     P( A, B, C, D,  8,  7, 0x698098D8 );
00162     P( D, A, B, C,  9, 12, 0x8B44F7AF );
00163     P( C, D, A, B, 10, 17, 0xFFFF5BB1 );
00164     P( B, C, D, A, 11, 22, 0x895CD7BE );
00165     P( A, B, C, D, 12,  7, 0x6B901122 );
00166     P( D, A, B, C, 13, 12, 0xFD987193 );
00167     P( C, D, A, B, 14, 17, 0xA679438E );
00168     P( B, C, D, A, 15, 22, 0x49B40821 );
00169 
00170 #undef F
00171 
00172 #define F(x,y,z) (y ^ (z & (x ^ y)))
00173 
00174     P( A, B, C, D,  1,  5, 0xF61E2562 );
00175     P( D, A, B, C,  6,  9, 0xC040B340 );
00176     P( C, D, A, B, 11, 14, 0x265E5A51 );
00177     P( B, C, D, A,  0, 20, 0xE9B6C7AA );
00178     P( A, B, C, D,  5,  5, 0xD62F105D );
00179     P( D, A, B, C, 10,  9, 0x02441453 );
00180     P( C, D, A, B, 15, 14, 0xD8A1E681 );
00181     P( B, C, D, A,  4, 20, 0xE7D3FBC8 );
00182     P( A, B, C, D,  9,  5, 0x21E1CDE6 );
00183     P( D, A, B, C, 14,  9, 0xC33707D6 );
00184     P( C, D, A, B,  3, 14, 0xF4D50D87 );
00185     P( B, C, D, A,  8, 20, 0x455A14ED );
00186     P( A, B, C, D, 13,  5, 0xA9E3E905 );
00187     P( D, A, B, C,  2,  9, 0xFCEFA3F8 );
00188     P( C, D, A, B,  7, 14, 0x676F02D9 );
00189     P( B, C, D, A, 12, 20, 0x8D2A4C8A );
00190 
00191 #undef F
00192 
00193 #define F(x,y,z) (x ^ y ^ z)
00194 
00195     P( A, B, C, D,  5,  4, 0xFFFA3942 );
00196     P( D, A, B, C,  8, 11, 0x8771F681 );
00197     P( C, D, A, B, 11, 16, 0x6D9D6122 );
00198     P( B, C, D, A, 14, 23, 0xFDE5380C );
00199     P( A, B, C, D,  1,  4, 0xA4BEEA44 );
00200     P( D, A, B, C,  4, 11, 0x4BDECFA9 );
00201     P( C, D, A, B,  7, 16, 0xF6BB4B60 );
00202     P( B, C, D, A, 10, 23, 0xBEBFBC70 );
00203     P( A, B, C, D, 13,  4, 0x289B7EC6 );
00204     P( D, A, B, C,  0, 11, 0xEAA127FA );
00205     P( C, D, A, B,  3, 16, 0xD4EF3085 );
00206     P( B, C, D, A,  6, 23, 0x04881D05 );
00207     P( A, B, C, D,  9,  4, 0xD9D4D039 );
00208     P( D, A, B, C, 12, 11, 0xE6DB99E5 );
00209     P( C, D, A, B, 15, 16, 0x1FA27CF8 );
00210     P( B, C, D, A,  2, 23, 0xC4AC5665 );
00211 
00212 #undef F
00213 
00214 #define F(x,y,z) (y ^ (x | ~z))
00215 
00216     P( A, B, C, D,  0,  6, 0xF4292244 );
00217     P( D, A, B, C,  7, 10, 0x432AFF97 );
00218     P( C, D, A, B, 14, 15, 0xAB9423A7 );
00219     P( B, C, D, A,  5, 21, 0xFC93A039 );
00220     P( A, B, C, D, 12,  6, 0x655B59C3 );
00221     P( D, A, B, C,  3, 10, 0x8F0CCC92 );
00222     P( C, D, A, B, 10, 15, 0xFFEFF47D );
00223     P( B, C, D, A,  1, 21, 0x85845DD1 );
00224     P( A, B, C, D,  8,  6, 0x6FA87E4F );
00225     P( D, A, B, C, 15, 10, 0xFE2CE6E0 );
00226     P( C, D, A, B,  6, 15, 0xA3014314 );
00227     P( B, C, D, A, 13, 21, 0x4E0811A1 );
00228     P( A, B, C, D,  4,  6, 0xF7537E82 );
00229     P( D, A, B, C, 11, 10, 0xBD3AF235 );
00230     P( C, D, A, B,  2, 15, 0x2AD7D2BB );
00231     P( B, C, D, A,  9, 21, 0xEB86D391 );
00232 
00233 #undef F
00234 
00235     ctx->state [0] += A;
00236     ctx->state [1] += B;
00237     ctx->state [2] += C;
00238     ctx->state [3] += D;
00239 
00240     return( 0 );
00241 }
00242 
00243 #if !defined(MBEDTLS_DEPRECATED_REMOVED)
00244 void mbedtls_md5_process( mbedtls_md5_context *ctx,
00245                           const unsigned char data[64] )
00246 {
00247     mbedtls_internal_md5_process( ctx, data );
00248 }
00249 #endif
00250 #endif /* !MBEDTLS_MD5_PROCESS_ALT */
00251 
00252 /*
00253  * MD5 process buffer
00254  */
00255 int mbedtls_md5_update_ret( mbedtls_md5_context *ctx,
00256                             const unsigned char *input,
00257                             size_t ilen )
00258 {
00259     int ret;
00260     size_t fill;
00261     uint32_t left;
00262 
00263     if( ilen == 0 )
00264         return( 0 );
00265 
00266     left = ctx->total [0] & 0x3F;
00267     fill = 64 - left;
00268 
00269     ctx->total [0] += (uint32_t) ilen;
00270     ctx->total [0] &= 0xFFFFFFFF;
00271 
00272     if( ctx->total [0] < (uint32_t) ilen )
00273         ctx->total [1]++;
00274 
00275     if( left && ilen >= fill )
00276     {
00277         memcpy( (void *) (ctx->buffer  + left), input, fill );
00278         if( ( ret = mbedtls_internal_md5_process( ctx, ctx->buffer  ) ) != 0 )
00279             return( ret );
00280 
00281         input += fill;
00282         ilen  -= fill;
00283         left = 0;
00284     }
00285 
00286     while( ilen >= 64 )
00287     {
00288         if( ( ret = mbedtls_internal_md5_process( ctx, input ) ) != 0 )
00289             return( ret );
00290 
00291         input += 64;
00292         ilen  -= 64;
00293     }
00294 
00295     if( ilen > 0 )
00296     {
00297         memcpy( (void *) (ctx->buffer  + left), input, ilen );
00298     }
00299 
00300     return( 0 );
00301 }
00302 
00303 #if !defined(MBEDTLS_DEPRECATED_REMOVED)
00304 void mbedtls_md5_update( mbedtls_md5_context *ctx,
00305                          const unsigned char *input,
00306                          size_t ilen )
00307 {
00308     mbedtls_md5_update_ret( ctx, input, ilen );
00309 }
00310 #endif
00311 
00312 /*
00313  * MD5 final digest
00314  */
00315 int mbedtls_md5_finish_ret( mbedtls_md5_context *ctx,
00316                             unsigned char output[16] )
00317 {
00318     int ret;
00319     uint32_t used;
00320     uint32_t high, low;
00321 
00322     /*
00323      * Add padding: 0x80 then 0x00 until 8 bytes remain for the length
00324      */
00325     used = ctx->total [0] & 0x3F;
00326 
00327     ctx->buffer [used++] = 0x80;
00328 
00329     if( used <= 56 )
00330     {
00331         /* Enough room for padding + length in current block */
00332         memset( ctx->buffer  + used, 0, 56 - used );
00333     }
00334     else
00335     {
00336         /* We'll need an extra block */
00337         memset( ctx->buffer  + used, 0, 64 - used );
00338 
00339         if( ( ret = mbedtls_internal_md5_process( ctx, ctx->buffer  ) ) != 0 )
00340             return( ret );
00341 
00342         memset( ctx->buffer , 0, 56 );
00343     }
00344 
00345     /*
00346      * Add message length
00347      */
00348     high = ( ctx->total [0] >> 29 )
00349          | ( ctx->total [1] <<  3 );
00350     low  = ( ctx->total [0] <<  3 );
00351 
00352     PUT_UINT32_LE( low,  ctx->buffer , 56 );
00353     PUT_UINT32_LE( high, ctx->buffer , 60 );
00354 
00355     if( ( ret = mbedtls_internal_md5_process( ctx, ctx->buffer  ) ) != 0 )
00356         return( ret );
00357 
00358     /*
00359      * Output final state
00360      */
00361     PUT_UINT32_LE( ctx->state [0], output,  0 );
00362     PUT_UINT32_LE( ctx->state [1], output,  4 );
00363     PUT_UINT32_LE( ctx->state [2], output,  8 );
00364     PUT_UINT32_LE( ctx->state [3], output, 12 );
00365 
00366     return( 0 );
00367 }
00368 
00369 #if !defined(MBEDTLS_DEPRECATED_REMOVED)
00370 void mbedtls_md5_finish( mbedtls_md5_context *ctx,
00371                          unsigned char output[16] )
00372 {
00373     mbedtls_md5_finish_ret( ctx, output );
00374 }
00375 #endif
00376 
00377 #endif /* !MBEDTLS_MD5_ALT */
00378 
00379 /*
00380  * output = MD5( input buffer )
00381  */
00382 int mbedtls_md5_ret( const unsigned char *input,
00383                      size_t ilen,
00384                      unsigned char output[16] )
00385 {
00386     int ret;
00387     mbedtls_md5_context ctx;
00388 
00389     mbedtls_md5_init( &ctx );
00390 
00391     if( ( ret = mbedtls_md5_starts_ret( &ctx ) ) != 0 )
00392         goto exit;
00393 
00394     if( ( ret = mbedtls_md5_update_ret( &ctx, input, ilen ) ) != 0 )
00395         goto exit;
00396 
00397     if( ( ret = mbedtls_md5_finish_ret( &ctx, output ) ) != 0 )
00398         goto exit;
00399 
00400 exit:
00401     mbedtls_md5_free( &ctx );
00402 
00403     return( ret );
00404 }
00405 
00406 #if !defined(MBEDTLS_DEPRECATED_REMOVED)
00407 void mbedtls_md5( const unsigned char *input,
00408                   size_t ilen,
00409                   unsigned char output[16] )
00410 {
00411     mbedtls_md5_ret( input, ilen, output );
00412 }
00413 #endif
00414 
00415 #if defined(MBEDTLS_SELF_TEST)
00416 /*
00417  * RFC 1321 test vectors
00418  */
00419 static const unsigned char md5_test_buf[7][81] =
00420 {
00421     { "" },
00422     { "a" },
00423     { "abc" },
00424     { "message digest" },
00425     { "abcdefghijklmnopqrstuvwxyz" },
00426     { "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789" },
00427     { "12345678901234567890123456789012345678901234567890123456789012"
00428       "345678901234567890" }
00429 };
00430 
00431 static const size_t md5_test_buflen[7] =
00432 {
00433     0, 1, 3, 14, 26, 62, 80
00434 };
00435 
00436 static const unsigned char md5_test_sum[7][16] =
00437 {
00438     { 0xD4, 0x1D, 0x8C, 0xD9, 0x8F, 0x00, 0xB2, 0x04,
00439       0xE9, 0x80, 0x09, 0x98, 0xEC, 0xF8, 0x42, 0x7E },
00440     { 0x0C, 0xC1, 0x75, 0xB9, 0xC0, 0xF1, 0xB6, 0xA8,
00441       0x31, 0xC3, 0x99, 0xE2, 0x69, 0x77, 0x26, 0x61 },
00442     { 0x90, 0x01, 0x50, 0x98, 0x3C, 0xD2, 0x4F, 0xB0,
00443       0xD6, 0x96, 0x3F, 0x7D, 0x28, 0xE1, 0x7F, 0x72 },
00444     { 0xF9, 0x6B, 0x69, 0x7D, 0x7C, 0xB7, 0x93, 0x8D,
00445       0x52, 0x5A, 0x2F, 0x31, 0xAA, 0xF1, 0x61, 0xD0 },
00446     { 0xC3, 0xFC, 0xD3, 0xD7, 0x61, 0x92, 0xE4, 0x00,
00447       0x7D, 0xFB, 0x49, 0x6C, 0xCA, 0x67, 0xE1, 0x3B },
00448     { 0xD1, 0x74, 0xAB, 0x98, 0xD2, 0x77, 0xD9, 0xF5,
00449       0xA5, 0x61, 0x1C, 0x2C, 0x9F, 0x41, 0x9D, 0x9F },
00450     { 0x57, 0xED, 0xF4, 0xA2, 0x2B, 0xE3, 0xC9, 0x55,
00451       0xAC, 0x49, 0xDA, 0x2E, 0x21, 0x07, 0xB6, 0x7A }
00452 };
00453 
00454 /*
00455  * Checkup routine
00456  */
00457 int mbedtls_md5_self_test( int verbose )
00458 {
00459     int i, ret = 0;
00460     unsigned char md5sum[16];
00461 
00462     for( i = 0; i < 7; i++ )
00463     {
00464         if( verbose != 0 )
00465             mbedtls_printf( "  MD5 test #%d: ", i + 1 );
00466 
00467         ret = mbedtls_md5_ret( md5_test_buf[i], md5_test_buflen[i], md5sum );
00468         if( ret != 0 )
00469             goto fail;
00470 
00471         if( memcmp( md5sum, md5_test_sum[i], 16 ) != 0 )
00472         {
00473             ret = 1;
00474             goto fail;
00475         }
00476 
00477         if( verbose != 0 )
00478             mbedtls_printf( "passed\n" );
00479     }
00480 
00481     if( verbose != 0 )
00482         mbedtls_printf( "\n" );
00483 
00484     return( 0 );
00485 
00486 fail:
00487     if( verbose != 0 )
00488         mbedtls_printf( "failed\n" );
00489 
00490     return( ret );
00491 }
00492 
00493 #endif /* MBEDTLS_SELF_TEST */
00494 
00495 #endif /* MBEDTLS_MD5_C */