git.zerfleddert.de Git - proxmark3-svn/blob - common/mbedtls/sha1.c

   1 /*
   2  *  FIPS-180-1 compliant SHA-1 implementation
   3  *
   4  *  Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
   5  *  SPDX-License-Identifier: GPL-2.0
   6  *
   7  *  This program is free software; you can redistribute it and/or modify
   8  *  it under the terms of the GNU General Public License as published by
   9  *  the Free Software Foundation; either version 2 of the License, or
  10  *  (at your option) any later version.
  11  *
  12  *  This program is distributed in the hope that it will be useful,
  13  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *  GNU General Public License for more details.
  16  *
  17  *  You should have received a copy of the GNU General Public License along
  18  *  with this program; if not, write to the Free Software Foundation, Inc.,
  19  *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  *  This file is part of mbed TLS (https://tls.mbed.org)
  22  */
  23 /*
  24  *  The SHA-1 standard was published by NIST in 1993.
  25  *
  26  *  http://www.itl.nist.gov/fipspubs/fip180-1.htm
  27  */
  28
  29 #if !defined(MBEDTLS_CONFIG_FILE)
  30 #include "mbedtls/config.h"
  31 #else
  32 #include MBEDTLS_CONFIG_FILE
  33 #endif
  34
  35 #if defined(MBEDTLS_SHA1_C)
  36
  37 #include "mbedtls/sha1.h"
  38 #include "mbedtls/platform_util.h"
  39
  40 #include <string.h>
  41
  42 #if defined(MBEDTLS_SELF_TEST)
  43 #if defined(MBEDTLS_PLATFORM_C)
  44 #include "mbedtls/platform.h"
  45 #else
  46 #include <stdio.h>
  47 #define mbedtls_printf printf
  48 #endif /* MBEDTLS_PLATFORM_C */
  49 #endif /* MBEDTLS_SELF_TEST */
  50
  51 #if !defined(MBEDTLS_SHA1_ALT)
  52
  53 /*
  54  * 32-bit integer manipulation macros (big endian)
  55  */
  56 #ifndef GET_UINT32_BE
  57 #define GET_UINT32_BE(n,b,i)                            \
  58 {                                                       \
  59     (n) = ( (uint32_t) (b)[(i)    ] << 24 )             \
  60         | ( (uint32_t) (b)[(i) + 1] << 16 )             \
  61         | ( (uint32_t) (b)[(i) + 2] <<  8 )             \
  62         | ( (uint32_t) (b)[(i) + 3]       );            \
  63 }
  64 #endif
  65
  66 #ifndef PUT_UINT32_BE
  67 #define PUT_UINT32_BE(n,b,i)                            \
  68 {                                                       \
  69     (b)[(i)    ] = (unsigned char) ( (n) >> 24 );       \
  70     (b)[(i) + 1] = (unsigned char) ( (n) >> 16 );       \
  71     (b)[(i) + 2] = (unsigned char) ( (n) >>  8 );       \
  72     (b)[(i) + 3] = (unsigned char) ( (n)       );       \
  73 }
  74 #endif
  75
  76 void mbedtls_sha1_init( mbedtls_sha1_context *ctx )
  77 {
  78     memset( ctx, 0, sizeof( mbedtls_sha1_context ) );
  79 }
  80
  81 void mbedtls_sha1_free( mbedtls_sha1_context *ctx )
  82 {
  83     if( ctx == NULL )
  84         return;
  85
  86     mbedtls_platform_zeroize( ctx, sizeof( mbedtls_sha1_context ) );
  87 }
  88
  89 void mbedtls_sha1_clone( mbedtls_sha1_context *dst,
  90                          const mbedtls_sha1_context *src )
  91 {
  92     *dst = *src;
  93 }
  94
  95 /*
  96  * SHA-1 context setup
  97  */
  98 int mbedtls_sha1_starts_ret( mbedtls_sha1_context *ctx )
  99 {
 100     ctx->total[0] = 0;
 101     ctx->total[1] = 0;
 102
 103     ctx->state[0] = 0x67452301;
 104     ctx->state[1] = 0xEFCDAB89;
 105     ctx->state[2] = 0x98BADCFE;
 106     ctx->state[3] = 0x10325476;
 107     ctx->state[4] = 0xC3D2E1F0;
 108
 109     return( 0 );
 110 }
 111
 112 #if !defined(MBEDTLS_DEPRECATED_REMOVED)
 113 void mbedtls_sha1_starts( mbedtls_sha1_context *ctx )
 114 {
 115     mbedtls_sha1_starts_ret( ctx );
 116 }
 117 #endif
 118
 119 #if !defined(MBEDTLS_SHA1_PROCESS_ALT)
 120 int mbedtls_internal_sha1_process( mbedtls_sha1_context *ctx,
 121                                    const unsigned char data[64] )
 122 {
 123     uint32_t temp, W[16], A, B, C, D, E;
 124
 125     GET_UINT32_BE( W[ 0], data,  0 );
 126     GET_UINT32_BE( W[ 1], data,  4 );
 127     GET_UINT32_BE( W[ 2], data,  8 );
 128     GET_UINT32_BE( W[ 3], data, 12 );
 129     GET_UINT32_BE( W[ 4], data, 16 );
 130     GET_UINT32_BE( W[ 5], data, 20 );
 131     GET_UINT32_BE( W[ 6], data, 24 );
 132     GET_UINT32_BE( W[ 7], data, 28 );
 133     GET_UINT32_BE( W[ 8], data, 32 );
 134     GET_UINT32_BE( W[ 9], data, 36 );
 135     GET_UINT32_BE( W[10], data, 40 );
 136     GET_UINT32_BE( W[11], data, 44 );
 137     GET_UINT32_BE( W[12], data, 48 );
 138     GET_UINT32_BE( W[13], data, 52 );
 139     GET_UINT32_BE( W[14], data, 56 );
 140     GET_UINT32_BE( W[15], data, 60 );
 141
 142 #define S(x,n) ((x << n) | ((x & 0xFFFFFFFF) >> (32 - n)))
 143
 144 #define R(t)                                            \
 145 (                                                       \
 146     temp = W[( t -  3 ) & 0x0F] ^ W[( t - 8 ) & 0x0F] ^ \
 147            W[( t - 14 ) & 0x0F] ^ W[  t       & 0x0F],  \
 148     ( W[t & 0x0F] = S(temp,1) )                         \
 149 )
 150
 151 #define P(a,b,c,d,e,x)                                  \
 152 {                                                       \
 153     e += S(a,5) + F(b,c,d) + K + x; b = S(b,30);        \
 154 }
 155
 156     A = ctx->state[0];
 157     B = ctx->state[1];
 158     C = ctx->state[2];
 159     D = ctx->state[3];
 160     E = ctx->state[4];
 161
 162 #define F(x,y,z) (z ^ (x & (y ^ z)))
 163 #define K 0x5A827999
 164
 165     P( A, B, C, D, E, W[0]  );
 166     P( E, A, B, C, D, W[1]  );
 167     P( D, E, A, B, C, W[2]  );
 168     P( C, D, E, A, B, W[3]  );
 169     P( B, C, D, E, A, W[4]  );
 170     P( A, B, C, D, E, W[5]  );
 171     P( E, A, B, C, D, W[6]  );
 172     P( D, E, A, B, C, W[7]  );
 173     P( C, D, E, A, B, W[8]  );
 174     P( B, C, D, E, A, W[9]  );
 175     P( A, B, C, D, E, W[10] );
 176     P( E, A, B, C, D, W[11] );
 177     P( D, E, A, B, C, W[12] );
 178     P( C, D, E, A, B, W[13] );
 179     P( B, C, D, E, A, W[14] );
 180     P( A, B, C, D, E, W[15] );
 181     P( E, A, B, C, D, R(16) );
 182     P( D, E, A, B, C, R(17) );
 183     P( C, D, E, A, B, R(18) );
 184     P( B, C, D, E, A, R(19) );
 185
 186 #undef K
 187 #undef F
 188
 189 #define F(x,y,z) (x ^ y ^ z)
 190 #define K 0x6ED9EBA1
 191
 192     P( A, B, C, D, E, R(20) );
 193     P( E, A, B, C, D, R(21) );
 194     P( D, E, A, B, C, R(22) );
 195     P( C, D, E, A, B, R(23) );
 196     P( B, C, D, E, A, R(24) );
 197     P( A, B, C, D, E, R(25) );
 198     P( E, A, B, C, D, R(26) );
 199     P( D, E, A, B, C, R(27) );
 200     P( C, D, E, A, B, R(28) );
 201     P( B, C, D, E, A, R(29) );
 202     P( A, B, C, D, E, R(30) );
 203     P( E, A, B, C, D, R(31) );
 204     P( D, E, A, B, C, R(32) );
 205     P( C, D, E, A, B, R(33) );
 206     P( B, C, D, E, A, R(34) );
 207     P( A, B, C, D, E, R(35) );
 208     P( E, A, B, C, D, R(36) );
 209     P( D, E, A, B, C, R(37) );
 210     P( C, D, E, A, B, R(38) );
 211     P( B, C, D, E, A, R(39) );
 212
 213 #undef K
 214 #undef F
 215
 216 #define F(x,y,z) ((x & y) | (z & (x | y)))
 217 #define K 0x8F1BBCDC
 218
 219     P( A, B, C, D, E, R(40) );
 220     P( E, A, B, C, D, R(41) );
 221     P( D, E, A, B, C, R(42) );
 222     P( C, D, E, A, B, R(43) );
 223     P( B, C, D, E, A, R(44) );
 224     P( A, B, C, D, E, R(45) );
 225     P( E, A, B, C, D, R(46) );
 226     P( D, E, A, B, C, R(47) );
 227     P( C, D, E, A, B, R(48) );
 228     P( B, C, D, E, A, R(49) );
 229     P( A, B, C, D, E, R(50) );
 230     P( E, A, B, C, D, R(51) );
 231     P( D, E, A, B, C, R(52) );
 232     P( C, D, E, A, B, R(53) );
 233     P( B, C, D, E, A, R(54) );
 234     P( A, B, C, D, E, R(55) );
 235     P( E, A, B, C, D, R(56) );
 236     P( D, E, A, B, C, R(57) );
 237     P( C, D, E, A, B, R(58) );
 238     P( B, C, D, E, A, R(59) );
 239
 240 #undef K
 241 #undef F
 242
 243 #define F(x,y,z) (x ^ y ^ z)
 244 #define K 0xCA62C1D6
 245
 246     P( A, B, C, D, E, R(60) );
 247     P( E, A, B, C, D, R(61) );
 248     P( D, E, A, B, C, R(62) );
 249     P( C, D, E, A, B, R(63) );
 250     P( B, C, D, E, A, R(64) );
 251     P( A, B, C, D, E, R(65) );
 252     P( E, A, B, C, D, R(66) );
 253     P( D, E, A, B, C, R(67) );
 254     P( C, D, E, A, B, R(68) );
 255     P( B, C, D, E, A, R(69) );
 256     P( A, B, C, D, E, R(70) );
 257     P( E, A, B, C, D, R(71) );
 258     P( D, E, A, B, C, R(72) );
 259     P( C, D, E, A, B, R(73) );
 260     P( B, C, D, E, A, R(74) );
 261     P( A, B, C, D, E, R(75) );
 262     P( E, A, B, C, D, R(76) );
 263     P( D, E, A, B, C, R(77) );
 264     P( C, D, E, A, B, R(78) );
 265     P( B, C, D, E, A, R(79) );
 266
 267 #undef K
 268 #undef F
 269
 270     ctx->state[0] += A;
 271     ctx->state[1] += B;
 272     ctx->state[2] += C;
 273     ctx->state[3] += D;
 274     ctx->state[4] += E;
 275
 276     return( 0 );
 277 }
 278
 279 #if !defined(MBEDTLS_DEPRECATED_REMOVED)
 280 void mbedtls_sha1_process( mbedtls_sha1_context *ctx,
 281                            const unsigned char data[64] )
 282 {
 283     mbedtls_internal_sha1_process( ctx, data );
 284 }
 285 #endif
 286 #endif /* !MBEDTLS_SHA1_PROCESS_ALT */
 287
 288 /*
 289  * SHA-1 process buffer
 290  */
 291 int mbedtls_sha1_update_ret( mbedtls_sha1_context *ctx,
 292                              const unsigned char *input,
 293                              size_t ilen )
 294 {
 295     int ret;
 296     size_t fill;
 297     uint32_t left;
 298
 299     if( ilen == 0 )
 300         return( 0 );
 301
 302     left = ctx->total[0] & 0x3F;
 303     fill = 64 - left;
 304
 305     ctx->total[0] += (uint32_t) ilen;
 306     ctx->total[0] &= 0xFFFFFFFF;
 307
 308     if( ctx->total[0] < (uint32_t) ilen )
 309         ctx->total[1]++;
 310
 311     if( left && ilen >= fill )
 312     {
 313         memcpy( (void *) (ctx->buffer + left), input, fill );
 314
 315         if( ( ret = mbedtls_internal_sha1_process( ctx, ctx->buffer ) ) != 0 )
 316             return( ret );
 317
 318         input += fill;
 319         ilen  -= fill;
 320         left = 0;
 321     }
 322
 323     while( ilen >= 64 )
 324     {
 325         if( ( ret = mbedtls_internal_sha1_process( ctx, input ) ) != 0 )
 326             return( ret );
 327
 328         input += 64;
 329         ilen  -= 64;
 330     }
 331
 332     if( ilen > 0 )
 333         memcpy( (void *) (ctx->buffer + left), input, ilen );
 334
 335     return( 0 );
 336 }
 337
 338 #if !defined(MBEDTLS_DEPRECATED_REMOVED)
 339 void mbedtls_sha1_update( mbedtls_sha1_context *ctx,
 340                           const unsigned char *input,
 341                           size_t ilen )
 342 {
 343     mbedtls_sha1_update_ret( ctx, input, ilen );
 344 }
 345 #endif
 346
 347 /*
 348  * SHA-1 final digest
 349  */
 350 int mbedtls_sha1_finish_ret( mbedtls_sha1_context *ctx,
 351                              unsigned char output[20] )
 352 {
 353     int ret;
 354     uint32_t used;
 355     uint32_t high, low;
 356
 357     /*
 358      * Add padding: 0x80 then 0x00 until 8 bytes remain for the length
 359      */
 360     used = ctx->total[0] & 0x3F;
 361
 362     ctx->buffer[used++] = 0x80;
 363
 364     if( used <= 56 )
 365     {
 366         /* Enough room for padding + length in current block */
 367         memset( ctx->buffer + used, 0, 56 - used );
 368     }
 369     else
 370     {
 371         /* We'll need an extra block */
 372         memset( ctx->buffer + used, 0, 64 - used );
 373
 374         if( ( ret = mbedtls_internal_sha1_process( ctx, ctx->buffer ) ) != 0 )
 375             return( ret );
 376
 377         memset( ctx->buffer, 0, 56 );
 378     }
 379
 380     /*
 381      * Add message length
 382      */
 383     high = ( ctx->total[0] >> 29 )
 384          | ( ctx->total[1] <<  3 );
 385     low  = ( ctx->total[0] <<  3 );
 386
 387     PUT_UINT32_BE( high, ctx->buffer, 56 );
 388     PUT_UINT32_BE( low,  ctx->buffer, 60 );
 389
 390     if( ( ret = mbedtls_internal_sha1_process( ctx, ctx->buffer ) ) != 0 )
 391         return( ret );
 392
 393     /*
 394      * Output final state
 395      */
 396     PUT_UINT32_BE( ctx->state[0], output,  0 );
 397     PUT_UINT32_BE( ctx->state[1], output,  4 );
 398     PUT_UINT32_BE( ctx->state[2], output,  8 );
 399     PUT_UINT32_BE( ctx->state[3], output, 12 );
 400     PUT_UINT32_BE( ctx->state[4], output, 16 );
 401
 402     return( 0 );
 403 }
 404
 405 #if !defined(MBEDTLS_DEPRECATED_REMOVED)
 406 void mbedtls_sha1_finish( mbedtls_sha1_context *ctx,
 407                           unsigned char output[20] )
 408 {
 409     mbedtls_sha1_finish_ret( ctx, output );
 410 }
 411 #endif
 412
 413 #endif /* !MBEDTLS_SHA1_ALT */
 414
 415 /*
 416  * output = SHA-1( input buffer )
 417  */
 418 int mbedtls_sha1_ret( const unsigned char *input,
 419                       size_t ilen,
 420                       unsigned char output[20] )
 421 {
 422     int ret;
 423     mbedtls_sha1_context ctx;
 424
 425     mbedtls_sha1_init( &ctx );
 426
 427     if( ( ret = mbedtls_sha1_starts_ret( &ctx ) ) != 0 )
 428         goto exit;
 429
 430     if( ( ret = mbedtls_sha1_update_ret( &ctx, input, ilen ) ) != 0 )
 431         goto exit;
 432
 433     if( ( ret = mbedtls_sha1_finish_ret( &ctx, output ) ) != 0 )
 434         goto exit;
 435
 436 exit:
 437     mbedtls_sha1_free( &ctx );
 438
 439     return( ret );
 440 }
 441
 442 #if !defined(MBEDTLS_DEPRECATED_REMOVED)
 443 void mbedtls_sha1( const unsigned char *input,
 444                    size_t ilen,
 445                    unsigned char output[20] )
 446 {
 447     mbedtls_sha1_ret( input, ilen, output );
 448 }
 449 #endif
 450
 451 #if defined(MBEDTLS_SELF_TEST)
 452 /*
 453  * FIPS-180-1 test vectors
 454  */
 455 static const unsigned char sha1_test_buf[3][57] =
 456 {
 457     { "abc" },
 458     { "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq" },
 459     { "" }
 460 };
 461
 462 static const size_t sha1_test_buflen[3] =
 463 {
 464     3, 56, 1000
 465 };
 466
 467 static const unsigned char sha1_test_sum[3][20] =
 468 {
 469     { 0xA9, 0x99, 0x3E, 0x36, 0x47, 0x06, 0x81, 0x6A, 0xBA, 0x3E,
 470       0x25, 0x71, 0x78, 0x50, 0xC2, 0x6C, 0x9C, 0xD0, 0xD8, 0x9D },
 471     { 0x84, 0x98, 0x3E, 0x44, 0x1C, 0x3B, 0xD2, 0x6E, 0xBA, 0xAE,
 472       0x4A, 0xA1, 0xF9, 0x51, 0x29, 0xE5, 0xE5, 0x46, 0x70, 0xF1 },
 473     { 0x34, 0xAA, 0x97, 0x3C, 0xD4, 0xC4, 0xDA, 0xA4, 0xF6, 0x1E,
 474       0xEB, 0x2B, 0xDB, 0xAD, 0x27, 0x31, 0x65, 0x34, 0x01, 0x6F }
 475 };
 476
 477 /*
 478  * Checkup routine
 479  */
 480 int mbedtls_sha1_self_test( int verbose )
 481 {
 482     int i, j, buflen, ret = 0;
 483     unsigned char buf[1024];
 484     unsigned char sha1sum[20];
 485     mbedtls_sha1_context ctx;
 486
 487     mbedtls_sha1_init( &ctx );
 488
 489     /*
 490      * SHA-1
 491      */
 492     for( i = 0; i < 3; i++ )
 493     {
 494         if( verbose != 0 )
 495             mbedtls_printf( "  SHA-1 test #%d: ", i + 1 );
 496
 497         if( ( ret = mbedtls_sha1_starts_ret( &ctx ) ) != 0 )
 498             goto fail;
 499
 500         if( i == 2 )
 501         {
 502             memset( buf, 'a', buflen = 1000 );
 503
 504             for( j = 0; j < 1000; j++ )
 505             {
 506                 ret = mbedtls_sha1_update_ret( &ctx, buf, buflen );
 507                 if( ret != 0 )
 508                     goto fail;
 509             }
 510         }
 511         else
 512         {
 513             ret = mbedtls_sha1_update_ret( &ctx, sha1_test_buf[i],
 514                                            sha1_test_buflen[i] );
 515             if( ret != 0 )
 516                 goto fail;
 517         }
 518
 519         if( ( ret = mbedtls_sha1_finish_ret( &ctx, sha1sum ) ) != 0 )
 520             goto fail;
 521
 522         if( memcmp( sha1sum, sha1_test_sum[i], 20 ) != 0 )
 523         {
 524             ret = 1;
 525             goto fail;
 526         }
 527
 528         if( verbose != 0 )
 529             mbedtls_printf( "passed\n" );
 530     }
 531
 532     if( verbose != 0 )
 533         mbedtls_printf( "\n" );
 534
 535     goto exit;
 536
 537 fail:
 538     if( verbose != 0 )
 539         mbedtls_printf( "failed\n" );
 540
 541 exit:
 542     mbedtls_sha1_free( &ctx );
 543
 544     return( ret );
 545 }
 546
 547 #endif /* MBEDTLS_SELF_TEST */
 548
 549 #endif /* MBEDTLS_SHA1_C */