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a_gentm.c 7.6 KB

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  1. /* crypto/asn1/a_gentm.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. /* GENERALIZEDTIME implementation, written by Steve Henson. Based on UTCTIME */
  59. #include <stdio.h>
  60. #include <time.h>
  61. #include "cryptlib.h"
  62. #include "o_time.h"
  63. #include <openssl/asn1.h>
  64. #if 0
  65. int i2d_ASN1_GENERALIZEDTIME(ASN1_GENERALIZEDTIME *a, unsigned char **pp)
  66. {
  67. #ifdef CHARSET_EBCDIC
  68. /* KLUDGE! We convert to ascii before writing DER */
  69. int len;
  70. char tmp[24];
  71. ASN1_STRING tmpstr = *(ASN1_STRING *)a;
  72. len = tmpstr.length;
  73. ebcdic2ascii(tmp, tmpstr.data, (len >= sizeof tmp) ? sizeof tmp : len);
  74. tmpstr.data = tmp;
  75. a = (ASN1_GENERALIZEDTIME *) &tmpstr;
  76. #endif
  77. return(i2d_ASN1_bytes((ASN1_STRING *)a,pp,
  78. V_ASN1_GENERALIZEDTIME,V_ASN1_UNIVERSAL));
  79. }
  80. ASN1_GENERALIZEDTIME *d2i_ASN1_GENERALIZEDTIME(ASN1_GENERALIZEDTIME **a,
  81. unsigned char **pp, long length)
  82. {
  83. ASN1_GENERALIZEDTIME *ret=NULL;
  84. ret=(ASN1_GENERALIZEDTIME *)d2i_ASN1_bytes((ASN1_STRING **)a,pp,length,
  85. V_ASN1_GENERALIZEDTIME,V_ASN1_UNIVERSAL);
  86. if (ret == NULL)
  87. {
  88. ASN1err(ASN1_F_D2I_ASN1_GENERALIZEDTIME,ERR_R_NESTED_ASN1_ERROR);
  89. return(NULL);
  90. }
  91. #ifdef CHARSET_EBCDIC
  92. ascii2ebcdic(ret->data, ret->data, ret->length);
  93. #endif
  94. if (!ASN1_GENERALIZEDTIME_check(ret))
  95. {
  96. ASN1err(ASN1_F_D2I_ASN1_GENERALIZEDTIME,ASN1_R_INVALID_TIME_FORMAT);
  97. goto err;
  98. }
  99. return(ret);
  100. err:
  101. if ((ret != NULL) && ((a == NULL) || (*a != ret)))
  102. M_ASN1_GENERALIZEDTIME_free(ret);
  103. return(NULL);
  104. }
  105. #endif
  106. int ASN1_GENERALIZEDTIME_check(const ASN1_GENERALIZEDTIME *d)
  107. {
  108. static const int min[9]={ 0, 0, 1, 1, 0, 0, 0, 0, 0};
  109. static const int max[9]={99, 99,12,31,23,59,59,12,59};
  110. char *a;
  111. int n,i,l,o;
  112. if (d->type != V_ASN1_GENERALIZEDTIME) return(0);
  113. l=d->length;
  114. a=(char *)d->data;
  115. o=0;
  116. /* GENERALIZEDTIME is similar to UTCTIME except the year is
  117. * represented as YYYY. This stuff treats everything as a two digit
  118. * field so make first two fields 00 to 99
  119. */
  120. if (l < 13) goto err;
  121. for (i=0; i<7; i++)
  122. {
  123. if ((i == 6) && ((a[o] == 'Z') ||
  124. (a[o] == '+') || (a[o] == '-')))
  125. { i++; break; }
  126. if ((a[o] < '0') || (a[o] > '9')) goto err;
  127. n= a[o]-'0';
  128. if (++o > l) goto err;
  129. if ((a[o] < '0') || (a[o] > '9')) goto err;
  130. n=(n*10)+ a[o]-'0';
  131. if (++o > l) goto err;
  132. if ((n < min[i]) || (n > max[i])) goto err;
  133. }
  134. /* Optional fractional seconds: decimal point followed by one
  135. * or more digits.
  136. */
  137. if (a[o] == '.')
  138. {
  139. if (++o > l) goto err;
  140. i = o;
  141. while ((a[o] >= '0') && (a[o] <= '9') && (o <= l))
  142. o++;
  143. /* Must have at least one digit after decimal point */
  144. if (i == o) goto err;
  145. }
  146. if (a[o] == 'Z')
  147. o++;
  148. else if ((a[o] == '+') || (a[o] == '-'))
  149. {
  150. o++;
  151. if (o+4 > l) goto err;
  152. for (i=7; i<9; i++)
  153. {
  154. if ((a[o] < '0') || (a[o] > '9')) goto err;
  155. n= a[o]-'0';
  156. o++;
  157. if ((a[o] < '0') || (a[o] > '9')) goto err;
  158. n=(n*10)+ a[o]-'0';
  159. if ((n < min[i]) || (n > max[i])) goto err;
  160. o++;
  161. }
  162. }
  163. else
  164. {
  165. /* Missing time zone information. */
  166. goto err;
  167. }
  168. return(o == l);
  169. err:
  170. return(0);
  171. }
  172. int ASN1_GENERALIZEDTIME_set_string(ASN1_GENERALIZEDTIME *s, const char *str)
  173. {
  174. ASN1_GENERALIZEDTIME t;
  175. t.type=V_ASN1_GENERALIZEDTIME;
  176. t.length=strlen(str);
  177. t.data=(unsigned char *)str;
  178. if (ASN1_GENERALIZEDTIME_check(&t))
  179. {
  180. if (s != NULL)
  181. {
  182. if (!ASN1_STRING_set((ASN1_STRING *)s,
  183. (unsigned char *)str,t.length))
  184. return 0;
  185. s->type=V_ASN1_GENERALIZEDTIME;
  186. }
  187. return(1);
  188. }
  189. else
  190. return(0);
  191. }
  192. ASN1_GENERALIZEDTIME *ASN1_GENERALIZEDTIME_set(ASN1_GENERALIZEDTIME *s,
  193. time_t t)
  194. {
  195. return ASN1_GENERALIZEDTIME_adj(s, t, 0, 0);
  196. }
  197. ASN1_GENERALIZEDTIME *ASN1_GENERALIZEDTIME_adj(ASN1_GENERALIZEDTIME *s,
  198. time_t t, int offset_day, long offset_sec)
  199. {
  200. char *p;
  201. struct tm *ts;
  202. struct tm data;
  203. size_t len = 20;
  204. if (s == NULL)
  205. s=M_ASN1_GENERALIZEDTIME_new();
  206. if (s == NULL)
  207. return(NULL);
  208. ts=OPENSSL_gmtime(&t, &data);
  209. if (ts == NULL)
  210. return(NULL);
  211. if (offset_day || offset_sec)
  212. {
  213. if (!OPENSSL_gmtime_adj(ts, offset_day, offset_sec))
  214. return NULL;
  215. }
  216. p=(char *)s->data;
  217. if ((p == NULL) || ((size_t)s->length < len))
  218. {
  219. p=OPENSSL_malloc(len);
  220. if (p == NULL)
  221. {
  222. ASN1err(ASN1_F_ASN1_GENERALIZEDTIME_ADJ,
  223. ERR_R_MALLOC_FAILURE);
  224. return(NULL);
  225. }
  226. if (s->data != NULL)
  227. OPENSSL_free(s->data);
  228. s->data=(unsigned char *)p;
  229. }
  230. BIO_snprintf(p,len,"%04d%02d%02d%02d%02d%02dZ",ts->tm_year + 1900,
  231. ts->tm_mon+1,ts->tm_mday,ts->tm_hour,ts->tm_min,ts->tm_sec);
  232. s->length=strlen(p);
  233. s->type=V_ASN1_GENERALIZEDTIME;
  234. #ifdef CHARSET_EBCDIC_not
  235. ebcdic2ascii(s->data, s->data, s->length);
  236. #endif
  237. return(s);
  238. }