evp_lib.c 7.4 KB

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  1. /* crypto/evp/evp_lib.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/evp.h>
  61. #include <openssl/objects.h>
  62. int EVP_CIPHER_param_to_asn1(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
  63. {
  64. int ret;
  65. if (c->cipher->set_asn1_parameters != NULL)
  66. ret = c->cipher->set_asn1_parameters(c, type);
  67. else if (c->cipher->flags & EVP_CIPH_FLAG_DEFAULT_ASN1)
  68. ret = EVP_CIPHER_set_asn1_iv(c, type);
  69. else
  70. ret = -1;
  71. return (ret);
  72. }
  73. int EVP_CIPHER_asn1_to_param(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
  74. {
  75. int ret;
  76. if (c->cipher->get_asn1_parameters != NULL)
  77. ret = c->cipher->get_asn1_parameters(c, type);
  78. else if (c->cipher->flags & EVP_CIPH_FLAG_DEFAULT_ASN1)
  79. ret = EVP_CIPHER_get_asn1_iv(c, type);
  80. else
  81. ret = -1;
  82. return (ret);
  83. }
  84. int EVP_CIPHER_get_asn1_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
  85. {
  86. int i = 0;
  87. unsigned int l;
  88. if (type != NULL) {
  89. l = EVP_CIPHER_CTX_iv_length(c);
  90. OPENSSL_assert(l <= sizeof(c->iv));
  91. i = ASN1_TYPE_get_octetstring(type, c->oiv, l);
  92. if (i != (int)l)
  93. return (-1);
  94. else if (i > 0)
  95. memcpy(c->iv, c->oiv, l);
  96. }
  97. return (i);
  98. }
  99. int EVP_CIPHER_set_asn1_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
  100. {
  101. int i = 0;
  102. unsigned int j;
  103. if (type != NULL) {
  104. j = EVP_CIPHER_CTX_iv_length(c);
  105. OPENSSL_assert(j <= sizeof(c->iv));
  106. i = ASN1_TYPE_set_octetstring(type, c->oiv, j);
  107. }
  108. return (i);
  109. }
  110. /* Convert the various cipher NIDs and dummies to a proper OID NID */
  111. int EVP_CIPHER_type(const EVP_CIPHER *ctx)
  112. {
  113. int nid;
  114. ASN1_OBJECT *otmp;
  115. nid = EVP_CIPHER_nid(ctx);
  116. switch (nid) {
  117. case NID_rc2_cbc:
  118. case NID_rc2_64_cbc:
  119. case NID_rc2_40_cbc:
  120. return NID_rc2_cbc;
  121. case NID_rc4:
  122. case NID_rc4_40:
  123. return NID_rc4;
  124. case NID_aes_128_cfb128:
  125. case NID_aes_128_cfb8:
  126. case NID_aes_128_cfb1:
  127. return NID_aes_128_cfb128;
  128. case NID_aes_192_cfb128:
  129. case NID_aes_192_cfb8:
  130. case NID_aes_192_cfb1:
  131. return NID_aes_192_cfb128;
  132. case NID_aes_256_cfb128:
  133. case NID_aes_256_cfb8:
  134. case NID_aes_256_cfb1:
  135. return NID_aes_256_cfb128;
  136. case NID_des_cfb64:
  137. case NID_des_cfb8:
  138. case NID_des_cfb1:
  139. return NID_des_cfb64;
  140. case NID_des_ede3_cfb64:
  141. case NID_des_ede3_cfb8:
  142. case NID_des_ede3_cfb1:
  143. return NID_des_cfb64;
  144. default:
  145. /* Check it has an OID and it is valid */
  146. otmp = OBJ_nid2obj(nid);
  147. if (!otmp || !otmp->data)
  148. nid = NID_undef;
  149. ASN1_OBJECT_free(otmp);
  150. return nid;
  151. }
  152. }
  153. int EVP_CIPHER_block_size(const EVP_CIPHER *e)
  154. {
  155. return e->block_size;
  156. }
  157. int EVP_CIPHER_CTX_block_size(const EVP_CIPHER_CTX *ctx)
  158. {
  159. return ctx->cipher->block_size;
  160. }
  161. const EVP_CIPHER *EVP_CIPHER_CTX_cipher(const EVP_CIPHER_CTX *ctx)
  162. {
  163. return ctx->cipher;
  164. }
  165. unsigned long EVP_CIPHER_flags(const EVP_CIPHER *cipher)
  166. {
  167. return cipher->flags;
  168. }
  169. void *EVP_CIPHER_CTX_get_app_data(const EVP_CIPHER_CTX *ctx)
  170. {
  171. return ctx->app_data;
  172. }
  173. void EVP_CIPHER_CTX_set_app_data(EVP_CIPHER_CTX *ctx, void *data)
  174. {
  175. ctx->app_data = data;
  176. }
  177. int EVP_CIPHER_iv_length(const EVP_CIPHER *cipher)
  178. {
  179. return cipher->iv_len;
  180. }
  181. int EVP_CIPHER_key_length(const EVP_CIPHER *cipher)
  182. {
  183. return cipher->key_len;
  184. }
  185. int EVP_CIPHER_CTX_key_length(const EVP_CIPHER_CTX *ctx)
  186. {
  187. return ctx->key_len;
  188. }
  189. int EVP_CIPHER_CTX_nid(const EVP_CIPHER_CTX *ctx)
  190. {
  191. return ctx->cipher->nid;
  192. }
  193. int EVP_MD_block_size(const EVP_MD *md)
  194. {
  195. return md->block_size;
  196. }
  197. int EVP_MD_type(const EVP_MD *md)
  198. {
  199. return md->type;
  200. }
  201. int EVP_MD_pkey_type(const EVP_MD *md)
  202. {
  203. return md->pkey_type;
  204. }
  205. int EVP_MD_size(const EVP_MD *md)
  206. {
  207. return md->md_size;
  208. }
  209. const EVP_MD *EVP_MD_CTX_md(const EVP_MD_CTX *ctx)
  210. {
  211. return ctx->digest;
  212. }
  213. void EVP_MD_CTX_set_flags(EVP_MD_CTX *ctx, int flags)
  214. {
  215. ctx->flags |= flags;
  216. }
  217. void EVP_MD_CTX_clear_flags(EVP_MD_CTX *ctx, int flags)
  218. {
  219. ctx->flags &= ~flags;
  220. }
  221. int EVP_MD_CTX_test_flags(const EVP_MD_CTX *ctx, int flags)
  222. {
  223. return (ctx->flags & flags);
  224. }
  225. void EVP_CIPHER_CTX_set_flags(EVP_CIPHER_CTX *ctx, int flags)
  226. {
  227. ctx->flags |= flags;
  228. }
  229. void EVP_CIPHER_CTX_clear_flags(EVP_CIPHER_CTX *ctx, int flags)
  230. {
  231. ctx->flags &= ~flags;
  232. }
  233. int EVP_CIPHER_CTX_test_flags(const EVP_CIPHER_CTX *ctx, int flags)
  234. {
  235. return (ctx->flags & flags);
  236. }