evp_asn1.c 6.1 KB

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  1. /* crypto/asn1/evp_asn1.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 "cryptlib.h"
  60. #include <openssl/asn1.h>
  61. #include <openssl/asn1_mac.h>
  62. int ASN1_TYPE_set_octetstring(ASN1_TYPE *a, unsigned char *data, int len)
  63. {
  64. ASN1_STRING *os;
  65. if ((os=M_ASN1_OCTET_STRING_new()) == NULL) return(0);
  66. if (!M_ASN1_OCTET_STRING_set(os,data,len)) return(0);
  67. ASN1_TYPE_set(a,V_ASN1_OCTET_STRING,os);
  68. return(1);
  69. }
  70. /* int max_len: for returned value */
  71. int ASN1_TYPE_get_octetstring(ASN1_TYPE *a, unsigned char *data,
  72. int max_len)
  73. {
  74. int ret,num;
  75. unsigned char *p;
  76. if ((a->type != V_ASN1_OCTET_STRING) || (a->value.octet_string == NULL))
  77. {
  78. ASN1err(ASN1_F_ASN1_TYPE_GET_OCTETSTRING,ASN1_R_DATA_IS_WRONG);
  79. return(-1);
  80. }
  81. p=M_ASN1_STRING_data(a->value.octet_string);
  82. ret=M_ASN1_STRING_length(a->value.octet_string);
  83. if (ret < max_len)
  84. num=ret;
  85. else
  86. num=max_len;
  87. memcpy(data,p,num);
  88. return(ret);
  89. }
  90. int ASN1_TYPE_set_int_octetstring(ASN1_TYPE *a, long num, unsigned char *data,
  91. int len)
  92. {
  93. int n,size;
  94. ASN1_OCTET_STRING os,*osp;
  95. ASN1_INTEGER in;
  96. unsigned char *p;
  97. unsigned char buf[32]; /* when they have 256bit longs,
  98. * I'll be in trouble */
  99. in.data=buf;
  100. in.length=32;
  101. os.data=data;
  102. os.type=V_ASN1_OCTET_STRING;
  103. os.length=len;
  104. ASN1_INTEGER_set(&in,num);
  105. n = i2d_ASN1_INTEGER(&in,NULL);
  106. n+=M_i2d_ASN1_OCTET_STRING(&os,NULL);
  107. size=ASN1_object_size(1,n,V_ASN1_SEQUENCE);
  108. if ((osp=ASN1_STRING_new()) == NULL) return(0);
  109. /* Grow the 'string' */
  110. if (!ASN1_STRING_set(osp,NULL,size))
  111. {
  112. ASN1_STRING_free(osp);
  113. return(0);
  114. }
  115. M_ASN1_STRING_length_set(osp, size);
  116. p=M_ASN1_STRING_data(osp);
  117. ASN1_put_object(&p,1,n,V_ASN1_SEQUENCE,V_ASN1_UNIVERSAL);
  118. i2d_ASN1_INTEGER(&in,&p);
  119. M_i2d_ASN1_OCTET_STRING(&os,&p);
  120. ASN1_TYPE_set(a,V_ASN1_SEQUENCE,osp);
  121. return(1);
  122. }
  123. /* we return the actual length..., num may be missing, in which
  124. * case, set it to zero */
  125. /* int max_len: for returned value */
  126. int ASN1_TYPE_get_int_octetstring(ASN1_TYPE *a, long *num, unsigned char *data,
  127. int max_len)
  128. {
  129. int ret= -1,n;
  130. ASN1_INTEGER *ai=NULL;
  131. ASN1_OCTET_STRING *os=NULL;
  132. const unsigned char *p;
  133. long length;
  134. ASN1_const_CTX c;
  135. if ((a->type != V_ASN1_SEQUENCE) || (a->value.sequence == NULL))
  136. {
  137. goto err;
  138. }
  139. p=M_ASN1_STRING_data(a->value.sequence);
  140. length=M_ASN1_STRING_length(a->value.sequence);
  141. c.pp= &p;
  142. c.p=p;
  143. c.max=p+length;
  144. c.error=ASN1_R_DATA_IS_WRONG;
  145. M_ASN1_D2I_start_sequence();
  146. c.q=c.p;
  147. if ((ai=d2i_ASN1_INTEGER(NULL,&c.p,c.slen)) == NULL) goto err;
  148. c.slen-=(c.p-c.q);
  149. c.q=c.p;
  150. if ((os=d2i_ASN1_OCTET_STRING(NULL,&c.p,c.slen)) == NULL) goto err;
  151. c.slen-=(c.p-c.q);
  152. if (!M_ASN1_D2I_end_sequence()) goto err;
  153. if (num != NULL)
  154. *num=ASN1_INTEGER_get(ai);
  155. ret=M_ASN1_STRING_length(os);
  156. if (max_len > ret)
  157. n=ret;
  158. else
  159. n=max_len;
  160. if (data != NULL)
  161. memcpy(data,M_ASN1_STRING_data(os),n);
  162. if (0)
  163. {
  164. err:
  165. ASN1err(ASN1_F_ASN1_TYPE_GET_INT_OCTETSTRING,ASN1_R_DATA_IS_WRONG);
  166. }
  167. if (os != NULL) M_ASN1_OCTET_STRING_free(os);
  168. if (ai != NULL) M_ASN1_INTEGER_free(ai);
  169. return(ret);
  170. }