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)                                                          \
00140     ( ( (x) << (n) ) | ( ( (x) & 0xFFFFFFFF) >> ( 32 - (n) ) ) )
00141 
00142 #define P(a,b,c,d,k,s,t)                                        \
00143     do                                                          \
00144     {                                                           \
00145         (a) += F((b),(c),(d)) + X[(k)] + (t);                   \
00146         (a) = S((a),(s)) + (b);                                 \
00147     } while( 0 )
00148 
00149     A = ctx->state [0];
00150     B = ctx->state [1];
00151     C = ctx->state [2];
00152     D = ctx->state [3];
00153 
00154 #define F(x,y,z) ((z) ^ ((x) & ((y) ^ (z))))
00155 
00156     P( A, B, C, D,  0,  7, 0xD76AA478 );
00157     P( D, A, B, C,  1, 12, 0xE8C7B756 );
00158     P( C, D, A, B,  2, 17, 0x242070DB );
00159     P( B, C, D, A,  3, 22, 0xC1BDCEEE );
00160     P( A, B, C, D,  4,  7, 0xF57C0FAF );
00161     P( D, A, B, C,  5, 12, 0x4787C62A );
00162     P( C, D, A, B,  6, 17, 0xA8304613 );
00163     P( B, C, D, A,  7, 22, 0xFD469501 );
00164     P( A, B, C, D,  8,  7, 0x698098D8 );
00165     P( D, A, B, C,  9, 12, 0x8B44F7AF );
00166     P( C, D, A, B, 10, 17, 0xFFFF5BB1 );
00167     P( B, C, D, A, 11, 22, 0x895CD7BE );
00168     P( A, B, C, D, 12,  7, 0x6B901122 );
00169     P( D, A, B, C, 13, 12, 0xFD987193 );
00170     P( C, D, A, B, 14, 17, 0xA679438E );
00171     P( B, C, D, A, 15, 22, 0x49B40821 );
00172 
00173 #undef F
00174 
00175 #define F(x,y,z) ((y) ^ ((z) & ((x) ^ (y))))
00176 
00177     P( A, B, C, D,  1,  5, 0xF61E2562 );
00178     P( D, A, B, C,  6,  9, 0xC040B340 );
00179     P( C, D, A, B, 11, 14, 0x265E5A51 );
00180     P( B, C, D, A,  0, 20, 0xE9B6C7AA );
00181     P( A, B, C, D,  5,  5, 0xD62F105D );
00182     P( D, A, B, C, 10,  9, 0x02441453 );
00183     P( C, D, A, B, 15, 14, 0xD8A1E681 );
00184     P( B, C, D, A,  4, 20, 0xE7D3FBC8 );
00185     P( A, B, C, D,  9,  5, 0x21E1CDE6 );
00186     P( D, A, B, C, 14,  9, 0xC33707D6 );
00187     P( C, D, A, B,  3, 14, 0xF4D50D87 );
00188     P( B, C, D, A,  8, 20, 0x455A14ED );
00189     P( A, B, C, D, 13,  5, 0xA9E3E905 );
00190     P( D, A, B, C,  2,  9, 0xFCEFA3F8 );
00191     P( C, D, A, B,  7, 14, 0x676F02D9 );
00192     P( B, C, D, A, 12, 20, 0x8D2A4C8A );
00193 
00194 #undef F
00195 
00196 #define F(x,y,z) ((x) ^ (y) ^ (z))
00197 
00198     P( A, B, C, D,  5,  4, 0xFFFA3942 );
00199     P( D, A, B, C,  8, 11, 0x8771F681 );
00200     P( C, D, A, B, 11, 16, 0x6D9D6122 );
00201     P( B, C, D, A, 14, 23, 0xFDE5380C );
00202     P( A, B, C, D,  1,  4, 0xA4BEEA44 );
00203     P( D, A, B, C,  4, 11, 0x4BDECFA9 );
00204     P( C, D, A, B,  7, 16, 0xF6BB4B60 );
00205     P( B, C, D, A, 10, 23, 0xBEBFBC70 );
00206     P( A, B, C, D, 13,  4, 0x289B7EC6 );
00207     P( D, A, B, C,  0, 11, 0xEAA127FA );
00208     P( C, D, A, B,  3, 16, 0xD4EF3085 );
00209     P( B, C, D, A,  6, 23, 0x04881D05 );
00210     P( A, B, C, D,  9,  4, 0xD9D4D039 );
00211     P( D, A, B, C, 12, 11, 0xE6DB99E5 );
00212     P( C, D, A, B, 15, 16, 0x1FA27CF8 );
00213     P( B, C, D, A,  2, 23, 0xC4AC5665 );
00214 
00215 #undef F
00216 
00217 #define F(x,y,z) ((y) ^ ((x) | ~(z)))
00218 
00219     P( A, B, C, D,  0,  6, 0xF4292244 );
00220     P( D, A, B, C,  7, 10, 0x432AFF97 );
00221     P( C, D, A, B, 14, 15, 0xAB9423A7 );
00222     P( B, C, D, A,  5, 21, 0xFC93A039 );
00223     P( A, B, C, D, 12,  6, 0x655B59C3 );
00224     P( D, A, B, C,  3, 10, 0x8F0CCC92 );
00225     P( C, D, A, B, 10, 15, 0xFFEFF47D );
00226     P( B, C, D, A,  1, 21, 0x85845DD1 );
00227     P( A, B, C, D,  8,  6, 0x6FA87E4F );
00228     P( D, A, B, C, 15, 10, 0xFE2CE6E0 );
00229     P( C, D, A, B,  6, 15, 0xA3014314 );
00230     P( B, C, D, A, 13, 21, 0x4E0811A1 );
00231     P( A, B, C, D,  4,  6, 0xF7537E82 );
00232     P( D, A, B, C, 11, 10, 0xBD3AF235 );
00233     P( C, D, A, B,  2, 15, 0x2AD7D2BB );
00234     P( B, C, D, A,  9, 21, 0xEB86D391 );
00235 
00236 #undef F
00237 
00238     ctx->state [0] += A;
00239     ctx->state [1] += B;
00240     ctx->state [2] += C;
00241     ctx->state [3] += D;
00242 
00243     return( 0 );
00244 }
00245 
00246 #if !defined(MBEDTLS_DEPRECATED_REMOVED)
00247 void mbedtls_md5_process( mbedtls_md5_context *ctx,
00248                           const unsigned char data[64] )
00249 {
00250     mbedtls_internal_md5_process( ctx, data );
00251 }
00252 #endif
00253 #endif /* !MBEDTLS_MD5_PROCESS_ALT */
00254 
00255 /*
00256  * MD5 process buffer
00257  */
00258 int mbedtls_md5_update_ret( mbedtls_md5_context *ctx,
00259                             const unsigned char *input,
00260                             size_t ilen )
00261 {
00262     int ret;
00263     size_t fill;
00264     uint32_t left;
00265 
00266     if( ilen == 0 )
00267         return( 0 );
00268 
00269     left = ctx->total [0] & 0x3F;
00270     fill = 64 - left;
00271 
00272     ctx->total [0] += (uint32_t) ilen;
00273     ctx->total [0] &= 0xFFFFFFFF;
00274 
00275     if( ctx->total [0] < (uint32_t) ilen )
00276         ctx->total [1]++;
00277 
00278     if( left && ilen >= fill )
00279     {
00280         memcpy( (void *) (ctx->buffer  + left), input, fill );
00281         if( ( ret = mbedtls_internal_md5_process( ctx, ctx->buffer  ) ) != 0 )
00282             return( ret );
00283 
00284         input += fill;
00285         ilen  -= fill;
00286         left = 0;
00287     }
00288 
00289     while( ilen >= 64 )
00290     {
00291         if( ( ret = mbedtls_internal_md5_process( ctx, input ) ) != 0 )
00292             return( ret );
00293 
00294         input += 64;
00295         ilen  -= 64;
00296     }
00297 
00298     if( ilen > 0 )
00299     {
00300         memcpy( (void *) (ctx->buffer  + left), input, ilen );
00301     }
00302 
00303     return( 0 );
00304 }
00305 
00306 #if !defined(MBEDTLS_DEPRECATED_REMOVED)
00307 void mbedtls_md5_update( mbedtls_md5_context *ctx,
00308                          const unsigned char *input,
00309                          size_t ilen )
00310 {
00311     mbedtls_md5_update_ret( ctx, input, ilen );
00312 }
00313 #endif
00314 
00315 /*
00316  * MD5 final digest
00317  */
00318 int mbedtls_md5_finish_ret( mbedtls_md5_context *ctx,
00319                             unsigned char output[16] )
00320 {
00321     int ret;
00322     uint32_t used;
00323     uint32_t high, low;
00324 
00325     /*
00326      * Add padding: 0x80 then 0x00 until 8 bytes remain for the length
00327      */
00328     used = ctx->total [0] & 0x3F;
00329 
00330     ctx->buffer [used++] = 0x80;
00331 
00332     if( used <= 56 )
00333     {
00334         /* Enough room for padding + length in current block */
00335         memset( ctx->buffer  + used, 0, 56 - used );
00336     }
00337     else
00338     {
00339         /* We'll need an extra block */
00340         memset( ctx->buffer  + used, 0, 64 - used );
00341 
00342         if( ( ret = mbedtls_internal_md5_process( ctx, ctx->buffer  ) ) != 0 )
00343             return( ret );
00344 
00345         memset( ctx->buffer , 0, 56 );
00346     }
00347 
00348     /*
00349      * Add message length
00350      */
00351     high = ( ctx->total [0] >> 29 )
00352          | ( ctx->total [1] <<  3 );
00353     low  = ( ctx->total [0] <<  3 );
00354 
00355     PUT_UINT32_LE( low,  ctx->buffer , 56 );
00356     PUT_UINT32_LE( high, ctx->buffer , 60 );
00357 
00358     if( ( ret = mbedtls_internal_md5_process( ctx, ctx->buffer  ) ) != 0 )
00359         return( ret );
00360 
00361     /*
00362      * Output final state
00363      */
00364     PUT_UINT32_LE( ctx->state [0], output,  0 );
00365     PUT_UINT32_LE( ctx->state [1], output,  4 );
00366     PUT_UINT32_LE( ctx->state [2], output,  8 );
00367     PUT_UINT32_LE( ctx->state [3], output, 12 );
00368 
00369     return( 0 );
00370 }
00371 
00372 #if !defined(MBEDTLS_DEPRECATED_REMOVED)
00373 void mbedtls_md5_finish( mbedtls_md5_context *ctx,
00374                          unsigned char output[16] )
00375 {
00376     mbedtls_md5_finish_ret( ctx, output );
00377 }
00378 #endif
00379 
00380 #endif /* !MBEDTLS_MD5_ALT */
00381 
00382 /*
00383  * output = MD5( input buffer )
00384  */
00385 int mbedtls_md5_ret( const unsigned char *input,
00386                      size_t ilen,
00387                      unsigned char output[16] )
00388 {
00389     int ret;
00390     mbedtls_md5_context ctx;
00391 
00392     mbedtls_md5_init( &ctx );
00393 
00394     if( ( ret = mbedtls_md5_starts_ret( &ctx ) ) != 0 )
00395         goto exit;
00396 
00397     if( ( ret = mbedtls_md5_update_ret( &ctx, input, ilen ) ) != 0 )
00398         goto exit;
00399 
00400     if( ( ret = mbedtls_md5_finish_ret( &ctx, output ) ) != 0 )
00401         goto exit;
00402 
00403 exit:
00404     mbedtls_md5_free( &ctx );
00405 
00406     return( ret );
00407 }
00408 
00409 #if !defined(MBEDTLS_DEPRECATED_REMOVED)
00410 void mbedtls_md5( const unsigned char *input,
00411                   size_t ilen,
00412                   unsigned char output[16] )
00413 {
00414     mbedtls_md5_ret( input, ilen, output );
00415 }
00416 #endif
00417 
00418 #if defined(MBEDTLS_SELF_TEST)
00419 /*
00420  * RFC 1321 test vectors
00421  */
00422 static const unsigned char md5_test_buf[7][81] =
00423 {
00424     { "" },
00425     { "a" },
00426     { "abc" },
00427     { "message digest" },
00428     { "abcdefghijklmnopqrstuvwxyz" },
00429     { "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789" },
00430     { "12345678901234567890123456789012345678901234567890123456789012"
00431       "345678901234567890" }
00432 };
00433 
00434 static const size_t md5_test_buflen[7] =
00435 {
00436     0, 1, 3, 14, 26, 62, 80
00437 };
00438 
00439 static const unsigned char md5_test_sum[7][16] =
00440 {
00441     { 0xD4, 0x1D, 0x8C, 0xD9, 0x8F, 0x00, 0xB2, 0x04,
00442       0xE9, 0x80, 0x09, 0x98, 0xEC, 0xF8, 0x42, 0x7E },
00443     { 0x0C, 0xC1, 0x75, 0xB9, 0xC0, 0xF1, 0xB6, 0xA8,
00444       0x31, 0xC3, 0x99, 0xE2, 0x69, 0x77, 0x26, 0x61 },
00445     { 0x90, 0x01, 0x50, 0x98, 0x3C, 0xD2, 0x4F, 0xB0,
00446       0xD6, 0x96, 0x3F, 0x7D, 0x28, 0xE1, 0x7F, 0x72 },
00447     { 0xF9, 0x6B, 0x69, 0x7D, 0x7C, 0xB7, 0x93, 0x8D,
00448       0x52, 0x5A, 0x2F, 0x31, 0xAA, 0xF1, 0x61, 0xD0 },
00449     { 0xC3, 0xFC, 0xD3, 0xD7, 0x61, 0x92, 0xE4, 0x00,
00450       0x7D, 0xFB, 0x49, 0x6C, 0xCA, 0x67, 0xE1, 0x3B },
00451     { 0xD1, 0x74, 0xAB, 0x98, 0xD2, 0x77, 0xD9, 0xF5,
00452       0xA5, 0x61, 0x1C, 0x2C, 0x9F, 0x41, 0x9D, 0x9F },
00453     { 0x57, 0xED, 0xF4, 0xA2, 0x2B, 0xE3, 0xC9, 0x55,
00454       0xAC, 0x49, 0xDA, 0x2E, 0x21, 0x07, 0xB6, 0x7A }
00455 };
00456 
00457 /*
00458  * Checkup routine
00459  */
00460 int mbedtls_md5_self_test( int verbose )
00461 {
00462     int i, ret = 0;
00463     unsigned char md5sum[16];
00464 
00465     for( i = 0; i < 7; i++ )
00466     {
00467         if( verbose != 0 )
00468             mbedtls_printf( "  MD5 test #%d: ", i + 1 );
00469 
00470         ret = mbedtls_md5_ret( md5_test_buf[i], md5_test_buflen[i], md5sum );
00471         if( ret != 0 )
00472             goto fail;
00473 
00474         if( memcmp( md5sum, md5_test_sum[i], 16 ) != 0 )
00475         {
00476             ret = 1;
00477             goto fail;
00478         }
00479 
00480         if( verbose != 0 )
00481             mbedtls_printf( "passed\n" );
00482     }
00483 
00484     if( verbose != 0 )
00485         mbedtls_printf( "\n" );
00486 
00487     return( 0 );
00488 
00489 fail:
00490     if( verbose != 0 )
00491         mbedtls_printf( "failed\n" );
00492 
00493     return( ret );
00494 }
00495 
00496 #endif /* MBEDTLS_SELF_TEST */
00497 
00498 #endif /* MBEDTLS_MD5_C */