md2.c 9.3 KB

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  1. /*
  2. * RFC 1115/1319 compliant MD2 implementation
  3. *
  4. * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
  5. * SPDX-License-Identifier: Apache-2.0
  6. *
  7. * Licensed under the Apache License, Version 2.0 (the "License"); you may
  8. * not use this file except in compliance with the License.
  9. * You may obtain a copy of the License at
  10. *
  11. * http://www.apache.org/licenses/LICENSE-2.0
  12. *
  13. * Unless required by applicable law or agreed to in writing, software
  14. * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
  15. * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  16. * See the License for the specific language governing permissions and
  17. * limitations under the License.
  18. *
  19. * This file is part of mbed TLS (https://tls.mbed.org)
  20. */
  21. /*
  22. * The MD2 algorithm was designed by Ron Rivest in 1989.
  23. *
  24. * http://www.ietf.org/rfc/rfc1115.txt
  25. * http://www.ietf.org/rfc/rfc1319.txt
  26. */
  27. #if !defined(MBEDTLS_CONFIG_FILE)
  28. #include "mbedtls/config.h"
  29. #else
  30. #include MBEDTLS_CONFIG_FILE
  31. #endif
  32. #if defined(MBEDTLS_MD2_C)
  33. #include "mbedtls/md2.h"
  34. #include <string.h>
  35. #if defined(MBEDTLS_SELF_TEST)
  36. #if defined(MBEDTLS_PLATFORM_C)
  37. #include "mbedtls/platform.h"
  38. #else
  39. #include <stdio.h>
  40. #define mbedtls_printf printf
  41. #endif /* MBEDTLS_PLATFORM_C */
  42. #endif /* MBEDTLS_SELF_TEST */
  43. #if !defined(MBEDTLS_MD2_ALT)
  44. /* Implementation that should never be optimized out by the compiler */
  45. static void mbedtls_zeroize( void *v, size_t n ) {
  46. volatile unsigned char *p = v; while( n-- ) *p++ = 0;
  47. }
  48. static const unsigned char PI_SUBST[256] =
  49. {
  50. 0x29, 0x2E, 0x43, 0xC9, 0xA2, 0xD8, 0x7C, 0x01, 0x3D, 0x36,
  51. 0x54, 0xA1, 0xEC, 0xF0, 0x06, 0x13, 0x62, 0xA7, 0x05, 0xF3,
  52. 0xC0, 0xC7, 0x73, 0x8C, 0x98, 0x93, 0x2B, 0xD9, 0xBC, 0x4C,
  53. 0x82, 0xCA, 0x1E, 0x9B, 0x57, 0x3C, 0xFD, 0xD4, 0xE0, 0x16,
  54. 0x67, 0x42, 0x6F, 0x18, 0x8A, 0x17, 0xE5, 0x12, 0xBE, 0x4E,
  55. 0xC4, 0xD6, 0xDA, 0x9E, 0xDE, 0x49, 0xA0, 0xFB, 0xF5, 0x8E,
  56. 0xBB, 0x2F, 0xEE, 0x7A, 0xA9, 0x68, 0x79, 0x91, 0x15, 0xB2,
  57. 0x07, 0x3F, 0x94, 0xC2, 0x10, 0x89, 0x0B, 0x22, 0x5F, 0x21,
  58. 0x80, 0x7F, 0x5D, 0x9A, 0x5A, 0x90, 0x32, 0x27, 0x35, 0x3E,
  59. 0xCC, 0xE7, 0xBF, 0xF7, 0x97, 0x03, 0xFF, 0x19, 0x30, 0xB3,
  60. 0x48, 0xA5, 0xB5, 0xD1, 0xD7, 0x5E, 0x92, 0x2A, 0xAC, 0x56,
  61. 0xAA, 0xC6, 0x4F, 0xB8, 0x38, 0xD2, 0x96, 0xA4, 0x7D, 0xB6,
  62. 0x76, 0xFC, 0x6B, 0xE2, 0x9C, 0x74, 0x04, 0xF1, 0x45, 0x9D,
  63. 0x70, 0x59, 0x64, 0x71, 0x87, 0x20, 0x86, 0x5B, 0xCF, 0x65,
  64. 0xE6, 0x2D, 0xA8, 0x02, 0x1B, 0x60, 0x25, 0xAD, 0xAE, 0xB0,
  65. 0xB9, 0xF6, 0x1C, 0x46, 0x61, 0x69, 0x34, 0x40, 0x7E, 0x0F,
  66. 0x55, 0x47, 0xA3, 0x23, 0xDD, 0x51, 0xAF, 0x3A, 0xC3, 0x5C,
  67. 0xF9, 0xCE, 0xBA, 0xC5, 0xEA, 0x26, 0x2C, 0x53, 0x0D, 0x6E,
  68. 0x85, 0x28, 0x84, 0x09, 0xD3, 0xDF, 0xCD, 0xF4, 0x41, 0x81,
  69. 0x4D, 0x52, 0x6A, 0xDC, 0x37, 0xC8, 0x6C, 0xC1, 0xAB, 0xFA,
  70. 0x24, 0xE1, 0x7B, 0x08, 0x0C, 0xBD, 0xB1, 0x4A, 0x78, 0x88,
  71. 0x95, 0x8B, 0xE3, 0x63, 0xE8, 0x6D, 0xE9, 0xCB, 0xD5, 0xFE,
  72. 0x3B, 0x00, 0x1D, 0x39, 0xF2, 0xEF, 0xB7, 0x0E, 0x66, 0x58,
  73. 0xD0, 0xE4, 0xA6, 0x77, 0x72, 0xF8, 0xEB, 0x75, 0x4B, 0x0A,
  74. 0x31, 0x44, 0x50, 0xB4, 0x8F, 0xED, 0x1F, 0x1A, 0xDB, 0x99,
  75. 0x8D, 0x33, 0x9F, 0x11, 0x83, 0x14
  76. };
  77. void mbedtls_md2_init( mbedtls_md2_context *ctx )
  78. {
  79. memset( ctx, 0, sizeof( mbedtls_md2_context ) );
  80. }
  81. void mbedtls_md2_free( mbedtls_md2_context *ctx )
  82. {
  83. if( ctx == NULL )
  84. return;
  85. mbedtls_zeroize( ctx, sizeof( mbedtls_md2_context ) );
  86. }
  87. void mbedtls_md2_clone( mbedtls_md2_context *dst,
  88. const mbedtls_md2_context *src )
  89. {
  90. *dst = *src;
  91. }
  92. /*
  93. * MD2 context setup
  94. */
  95. int mbedtls_md2_starts_ret( mbedtls_md2_context *ctx )
  96. {
  97. memset( ctx->cksum, 0, 16 );
  98. memset( ctx->state, 0, 46 );
  99. memset( ctx->buffer, 0, 16 );
  100. ctx->left = 0;
  101. return( 0 );
  102. }
  103. #if !defined(MBEDTLS_DEPRECATED_REMOVED)
  104. void mbedtls_md2_starts( mbedtls_md2_context *ctx )
  105. {
  106. mbedtls_md2_starts_ret( ctx );
  107. }
  108. #endif
  109. #if !defined(MBEDTLS_MD2_PROCESS_ALT)
  110. int mbedtls_internal_md2_process( mbedtls_md2_context *ctx )
  111. {
  112. int i, j;
  113. unsigned char t = 0;
  114. for( i = 0; i < 16; i++ )
  115. {
  116. ctx->state[i + 16] = ctx->buffer[i];
  117. ctx->state[i + 32] =
  118. (unsigned char)( ctx->buffer[i] ^ ctx->state[i]);
  119. }
  120. for( i = 0; i < 18; i++ )
  121. {
  122. for( j = 0; j < 48; j++ )
  123. {
  124. ctx->state[j] = (unsigned char)
  125. ( ctx->state[j] ^ PI_SUBST[t] );
  126. t = ctx->state[j];
  127. }
  128. t = (unsigned char)( t + i );
  129. }
  130. t = ctx->cksum[15];
  131. for( i = 0; i < 16; i++ )
  132. {
  133. ctx->cksum[i] = (unsigned char)
  134. ( ctx->cksum[i] ^ PI_SUBST[ctx->buffer[i] ^ t] );
  135. t = ctx->cksum[i];
  136. }
  137. return( 0 );
  138. }
  139. #if !defined(MBEDTLS_DEPRECATED_REMOVED)
  140. void mbedtls_md2_process( mbedtls_md2_context *ctx )
  141. {
  142. mbedtls_internal_md2_process( ctx );
  143. }
  144. #endif
  145. #endif /* !MBEDTLS_MD2_PROCESS_ALT */
  146. /*
  147. * MD2 process buffer
  148. */
  149. int mbedtls_md2_update_ret( mbedtls_md2_context *ctx,
  150. const unsigned char *input,
  151. size_t ilen )
  152. {
  153. int ret;
  154. size_t fill;
  155. while( ilen > 0 )
  156. {
  157. if( ilen > 16 - ctx->left )
  158. fill = 16 - ctx->left;
  159. else
  160. fill = ilen;
  161. memcpy( ctx->buffer + ctx->left, input, fill );
  162. ctx->left += fill;
  163. input += fill;
  164. ilen -= fill;
  165. if( ctx->left == 16 )
  166. {
  167. ctx->left = 0;
  168. if( ( ret = mbedtls_internal_md2_process( ctx ) ) != 0 )
  169. return( ret );
  170. }
  171. }
  172. return( 0 );
  173. }
  174. #if !defined(MBEDTLS_DEPRECATED_REMOVED)
  175. void mbedtls_md2_update( mbedtls_md2_context *ctx,
  176. const unsigned char *input,
  177. size_t ilen )
  178. {
  179. mbedtls_md2_update_ret( ctx, input, ilen );
  180. }
  181. #endif
  182. /*
  183. * MD2 final digest
  184. */
  185. int mbedtls_md2_finish_ret( mbedtls_md2_context *ctx,
  186. unsigned char output[16] )
  187. {
  188. int ret;
  189. size_t i;
  190. unsigned char x;
  191. x = (unsigned char)( 16 - ctx->left );
  192. for( i = ctx->left; i < 16; i++ )
  193. ctx->buffer[i] = x;
  194. if( ( ret = mbedtls_internal_md2_process( ctx ) ) != 0 )
  195. return( ret );
  196. memcpy( ctx->buffer, ctx->cksum, 16 );
  197. if( ( ret = mbedtls_internal_md2_process( ctx ) ) != 0 )
  198. return( ret );
  199. memcpy( output, ctx->state, 16 );
  200. return( 0 );
  201. }
  202. #if !defined(MBEDTLS_DEPRECATED_REMOVED)
  203. void mbedtls_md2_finish( mbedtls_md2_context *ctx,
  204. unsigned char output[16] )
  205. {
  206. mbedtls_md2_finish_ret( ctx, output );
  207. }
  208. #endif
  209. #endif /* !MBEDTLS_MD2_ALT */
  210. /*
  211. * output = MD2( input buffer )
  212. */
  213. int mbedtls_md2_ret( const unsigned char *input,
  214. size_t ilen,
  215. unsigned char output[16] )
  216. {
  217. int ret;
  218. mbedtls_md2_context ctx;
  219. mbedtls_md2_init( &ctx );
  220. if( ( ret = mbedtls_md2_starts_ret( &ctx ) ) != 0 )
  221. goto exit;
  222. if( ( ret = mbedtls_md2_update_ret( &ctx, input, ilen ) ) != 0 )
  223. goto exit;
  224. if( ( ret = mbedtls_md2_finish_ret( &ctx, output ) ) != 0 )
  225. goto exit;
  226. exit:
  227. mbedtls_md2_free( &ctx );
  228. return( ret );
  229. }
  230. #if !defined(MBEDTLS_DEPRECATED_REMOVED)
  231. void mbedtls_md2( const unsigned char *input,
  232. size_t ilen,
  233. unsigned char output[16] )
  234. {
  235. mbedtls_md2_ret( input, ilen, output );
  236. }
  237. #endif
  238. #if defined(MBEDTLS_SELF_TEST)
  239. /*
  240. * RFC 1319 test vectors
  241. */
  242. static const unsigned char md2_test_str[7][81] =
  243. {
  244. { "" },
  245. { "a" },
  246. { "abc" },
  247. { "message digest" },
  248. { "abcdefghijklmnopqrstuvwxyz" },
  249. { "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789" },
  250. { "12345678901234567890123456789012345678901234567890123456789012"
  251. "345678901234567890" }
  252. };
  253. static const size_t md2_test_strlen[7] =
  254. {
  255. 0, 1, 3, 14, 26, 62, 80
  256. };
  257. static const unsigned char md2_test_sum[7][16] =
  258. {
  259. { 0x83, 0x50, 0xE5, 0xA3, 0xE2, 0x4C, 0x15, 0x3D,
  260. 0xF2, 0x27, 0x5C, 0x9F, 0x80, 0x69, 0x27, 0x73 },
  261. { 0x32, 0xEC, 0x01, 0xEC, 0x4A, 0x6D, 0xAC, 0x72,
  262. 0xC0, 0xAB, 0x96, 0xFB, 0x34, 0xC0, 0xB5, 0xD1 },
  263. { 0xDA, 0x85, 0x3B, 0x0D, 0x3F, 0x88, 0xD9, 0x9B,
  264. 0x30, 0x28, 0x3A, 0x69, 0xE6, 0xDE, 0xD6, 0xBB },
  265. { 0xAB, 0x4F, 0x49, 0x6B, 0xFB, 0x2A, 0x53, 0x0B,
  266. 0x21, 0x9F, 0xF3, 0x30, 0x31, 0xFE, 0x06, 0xB0 },
  267. { 0x4E, 0x8D, 0xDF, 0xF3, 0x65, 0x02, 0x92, 0xAB,
  268. 0x5A, 0x41, 0x08, 0xC3, 0xAA, 0x47, 0x94, 0x0B },
  269. { 0xDA, 0x33, 0xDE, 0xF2, 0xA4, 0x2D, 0xF1, 0x39,
  270. 0x75, 0x35, 0x28, 0x46, 0xC3, 0x03, 0x38, 0xCD },
  271. { 0xD5, 0x97, 0x6F, 0x79, 0xD8, 0x3D, 0x3A, 0x0D,
  272. 0xC9, 0x80, 0x6C, 0x3C, 0x66, 0xF3, 0xEF, 0xD8 }
  273. };
  274. /*
  275. * Checkup routine
  276. */
  277. int mbedtls_md2_self_test( int verbose )
  278. {
  279. int i, ret = 0;
  280. unsigned char md2sum[16];
  281. for( i = 0; i < 7; i++ )
  282. {
  283. if( verbose != 0 )
  284. mbedtls_printf( " MD2 test #%d: ", i + 1 );
  285. ret = mbedtls_md2_ret( md2_test_str[i], md2_test_strlen[i], md2sum );
  286. if( ret != 0 )
  287. goto fail;
  288. if( memcmp( md2sum, md2_test_sum[i], 16 ) != 0 )
  289. {
  290. ret = 1;
  291. goto fail;
  292. }
  293. if( verbose != 0 )
  294. mbedtls_printf( "passed\n" );
  295. }
  296. if( verbose != 0 )
  297. mbedtls_printf( "\n" );
  298. return( 0 );
  299. fail:
  300. if( verbose != 0 )
  301. mbedtls_printf( "failed\n" );
  302. return( ret );
  303. }
  304. #endif /* MBEDTLS_SELF_TEST */
  305. #endif /* MBEDTLS_MD2_C */