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mdc2dgst.c 5.7 KB

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  1. /* crypto/mdc2/mdc2dgst.c */
  2. /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
  3. * All rights reserved.
  4. *
  5. * This package is an SSL implementation written
  6. * by Eric Young (eay@cryptsoft.com).
  7. * The implementation was written so as to conform with Netscapes SSL.
  8. *
  9. * This library is free for commercial and non-commercial use as long as
  10. * the following conditions are aheared to. The following conditions
  11. * apply to all code found in this distribution, be it the RC4, RSA,
  12. * lhash, DES, etc., code; not just the SSL code. The SSL documentation
  13. * included with this distribution is covered by the same copyright terms
  14. * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  15. *
  16. * Copyright remains Eric Young's, and as such any Copyright notices in
  17. * the code are not to be removed.
  18. * If this package is used in a product, Eric Young should be given attribution
  19. * as the author of the parts of the library used.
  20. * This can be in the form of a textual message at program startup or
  21. * in documentation (online or textual) provided with the package.
  22. *
  23. * Redistribution and use in source and binary forms, with or without
  24. * modification, are permitted provided that the following conditions
  25. * are met:
  26. * 1. Redistributions of source code must retain the copyright
  27. * notice, this list of conditions and the following disclaimer.
  28. * 2. Redistributions in binary form must reproduce the above copyright
  29. * notice, this list of conditions and the following disclaimer in the
  30. * documentation and/or other materials provided with the distribution.
  31. * 3. All advertising materials mentioning features or use of this software
  32. * must display the following acknowledgement:
  33. * "This product includes cryptographic software written by
  34. * Eric Young (eay@cryptsoft.com)"
  35. * The word 'cryptographic' can be left out if the rouines from the library
  36. * being used are not cryptographic related :-).
  37. * 4. If you include any Windows specific code (or a derivative thereof) from
  38. * the apps directory (application code) you must include an acknowledgement:
  39. * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  40. *
  41. * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  42. * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  43. * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  44. * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  45. * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  46. * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  47. * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  48. * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  49. * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  50. * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  51. * SUCH DAMAGE.
  52. *
  53. * The licence and distribution terms for any publically available version or
  54. * derivative of this code cannot be changed. i.e. this code cannot simply be
  55. * copied and put under another distribution licence
  56. * [including the GNU Public Licence.]
  57. */
  58. #include <stdio.h>
  59. #include <stdlib.h>
  60. #include <string.h>
  61. #include <openssl/des.h>
  62. #include <openssl/mdc2.h>
  63. #undef c2l
  64. #define c2l(c,l) (l =((DES_LONG)(*((c)++))) , \
  65. l|=((DES_LONG)(*((c)++)))<< 8L, \
  66. l|=((DES_LONG)(*((c)++)))<<16L, \
  67. l|=((DES_LONG)(*((c)++)))<<24L)
  68. #undef l2c
  69. #define l2c(l,c) (*((c)++)=(unsigned char)(((l) )&0xff), \
  70. *((c)++)=(unsigned char)(((l)>> 8L)&0xff), \
  71. *((c)++)=(unsigned char)(((l)>>16L)&0xff), \
  72. *((c)++)=(unsigned char)(((l)>>24L)&0xff))
  73. static void mdc2_body(MDC2_CTX *c, const unsigned char *in, size_t len);
  74. int MDC2_Init(MDC2_CTX *c)
  75. {
  76. c->num=0;
  77. c->pad_type=1;
  78. memset(&(c->h[0]),0x52,MDC2_BLOCK);
  79. memset(&(c->hh[0]),0x25,MDC2_BLOCK);
  80. return 1;
  81. }
  82. int MDC2_Update(MDC2_CTX *c, const unsigned char *in, size_t len)
  83. {
  84. size_t i,j;
  85. i=c->num;
  86. if (i != 0)
  87. {
  88. if (i+len < MDC2_BLOCK)
  89. {
  90. /* partial block */
  91. memcpy(&(c->data[i]),in,len);
  92. c->num+=(int)len;
  93. return 1;
  94. }
  95. else
  96. {
  97. /* filled one */
  98. j=MDC2_BLOCK-i;
  99. memcpy(&(c->data[i]),in,j);
  100. len-=j;
  101. in+=j;
  102. c->num=0;
  103. mdc2_body(c,&(c->data[0]),MDC2_BLOCK);
  104. }
  105. }
  106. i=len&~((size_t)MDC2_BLOCK-1);
  107. if (i > 0) mdc2_body(c,in,i);
  108. j=len-i;
  109. if (j > 0)
  110. {
  111. memcpy(&(c->data[0]),&(in[i]),j);
  112. c->num=(int)j;
  113. }
  114. return 1;
  115. }
  116. static void mdc2_body(MDC2_CTX *c, const unsigned char *in, size_t len)
  117. {
  118. register DES_LONG tin0,tin1;
  119. register DES_LONG ttin0,ttin1;
  120. DES_LONG d[2],dd[2];
  121. DES_key_schedule k;
  122. unsigned char *p;
  123. size_t i;
  124. for (i=0; i<len; i+=8)
  125. {
  126. c2l(in,tin0); d[0]=dd[0]=tin0;
  127. c2l(in,tin1); d[1]=dd[1]=tin1;
  128. c->h[0]=(c->h[0]&0x9f)|0x40;
  129. c->hh[0]=(c->hh[0]&0x9f)|0x20;
  130. DES_set_odd_parity(&c->h);
  131. DES_set_key_unchecked(&c->h,&k);
  132. DES_encrypt1(d,&k,1);
  133. DES_set_odd_parity(&c->hh);
  134. DES_set_key_unchecked(&c->hh,&k);
  135. DES_encrypt1(dd,&k,1);
  136. ttin0=tin0^dd[0];
  137. ttin1=tin1^dd[1];
  138. tin0^=d[0];
  139. tin1^=d[1];
  140. p=c->h;
  141. l2c(tin0,p);
  142. l2c(ttin1,p);
  143. p=c->hh;
  144. l2c(ttin0,p);
  145. l2c(tin1,p);
  146. }
  147. }
  148. int MDC2_Final(unsigned char *md, MDC2_CTX *c)
  149. {
  150. unsigned int i;
  151. int j;
  152. i=c->num;
  153. j=c->pad_type;
  154. if ((i > 0) || (j == 2))
  155. {
  156. if (j == 2)
  157. c->data[i++]=0x80;
  158. memset(&(c->data[i]),0,MDC2_BLOCK-i);
  159. mdc2_body(c,c->data,MDC2_BLOCK);
  160. }
  161. memcpy(md,(char *)c->h,MDC2_BLOCK);
  162. memcpy(&(md[MDC2_BLOCK]),(char *)c->hh,MDC2_BLOCK);
  163. return 1;
  164. }
  165. #undef TEST
  166. #ifdef TEST
  167. main()
  168. {
  169. unsigned char md[MDC2_DIGEST_LENGTH];
  170. int i;
  171. MDC2_CTX c;
  172. static char *text="Now is the time for all ";
  173. MDC2_Init(&c);
  174. MDC2_Update(&c,text,strlen(text));
  175. MDC2_Final(&(md[0]),&c);
  176. for (i=0; i<MDC2_DIGEST_LENGTH; i++)
  177. printf("%02X",md[i]);
  178. printf("\n");
  179. }
  180. #endif