d2i_pr.c 5.7 KB

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  1. /* crypto/asn1/d2i_pr.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/bn.h>
  61. #include <openssl/evp.h>
  62. #include <openssl/objects.h>
  63. #ifndef OPENSSL_NO_ENGINE
  64. #include <openssl/engine.h>
  65. #endif
  66. #include <openssl/x509.h>
  67. #include <openssl/asn1.h>
  68. #include "asn1_locl.h"
  69. EVP_PKEY *d2i_PrivateKey(int type, EVP_PKEY **a, const unsigned char **pp,
  70. long length)
  71. {
  72. EVP_PKEY *ret;
  73. if ((a == NULL) || (*a == NULL))
  74. {
  75. if ((ret=EVP_PKEY_new()) == NULL)
  76. {
  77. ASN1err(ASN1_F_D2I_PRIVATEKEY,ERR_R_EVP_LIB);
  78. return(NULL);
  79. }
  80. }
  81. else
  82. {
  83. ret= *a;
  84. #ifndef OPENSSL_NO_ENGINE
  85. if (ret->engine)
  86. {
  87. ENGINE_finish(ret->engine);
  88. ret->engine = NULL;
  89. }
  90. #endif
  91. }
  92. if (!EVP_PKEY_set_type(ret, type))
  93. {
  94. ASN1err(ASN1_F_D2I_PRIVATEKEY,ASN1_R_UNKNOWN_PUBLIC_KEY_TYPE);
  95. goto err;
  96. }
  97. if (!ret->ameth->old_priv_decode ||
  98. !ret->ameth->old_priv_decode(ret, pp, length))
  99. {
  100. if (ret->ameth->priv_decode)
  101. {
  102. PKCS8_PRIV_KEY_INFO *p8=NULL;
  103. p8=d2i_PKCS8_PRIV_KEY_INFO(NULL,pp,length);
  104. if (!p8) goto err;
  105. EVP_PKEY_free(ret);
  106. ret = EVP_PKCS82PKEY(p8);
  107. PKCS8_PRIV_KEY_INFO_free(p8);
  108. }
  109. else
  110. {
  111. ASN1err(ASN1_F_D2I_PRIVATEKEY,ERR_R_ASN1_LIB);
  112. goto err;
  113. }
  114. }
  115. if (a != NULL) (*a)=ret;
  116. return(ret);
  117. err:
  118. if ((ret != NULL) && ((a == NULL) || (*a != ret))) EVP_PKEY_free(ret);
  119. return(NULL);
  120. }
  121. /* This works like d2i_PrivateKey() except it automatically works out the type */
  122. EVP_PKEY *d2i_AutoPrivateKey(EVP_PKEY **a, const unsigned char **pp,
  123. long length)
  124. {
  125. STACK_OF(ASN1_TYPE) *inkey;
  126. const unsigned char *p;
  127. int keytype;
  128. p = *pp;
  129. /* Dirty trick: read in the ASN1 data into a STACK_OF(ASN1_TYPE):
  130. * by analyzing it we can determine the passed structure: this
  131. * assumes the input is surrounded by an ASN1 SEQUENCE.
  132. */
  133. inkey = d2i_ASN1_SEQUENCE_ANY(NULL, &p, length);
  134. /* Since we only need to discern "traditional format" RSA and DSA
  135. * keys we can just count the elements.
  136. */
  137. if(sk_ASN1_TYPE_num(inkey) == 6)
  138. keytype = EVP_PKEY_DSA;
  139. else if (sk_ASN1_TYPE_num(inkey) == 4)
  140. keytype = EVP_PKEY_EC;
  141. else if (sk_ASN1_TYPE_num(inkey) == 3)
  142. { /* This seems to be PKCS8, not traditional format */
  143. PKCS8_PRIV_KEY_INFO *p8 = d2i_PKCS8_PRIV_KEY_INFO(NULL,pp,length);
  144. EVP_PKEY *ret;
  145. sk_ASN1_TYPE_pop_free(inkey, ASN1_TYPE_free);
  146. if (!p8)
  147. {
  148. ASN1err(ASN1_F_D2I_AUTOPRIVATEKEY,ASN1_R_UNSUPPORTED_PUBLIC_KEY_TYPE);
  149. return NULL;
  150. }
  151. ret = EVP_PKCS82PKEY(p8);
  152. PKCS8_PRIV_KEY_INFO_free(p8);
  153. if (a) {
  154. *a = ret;
  155. }
  156. return ret;
  157. }
  158. else keytype = EVP_PKEY_RSA;
  159. sk_ASN1_TYPE_pop_free(inkey, ASN1_TYPE_free);
  160. return d2i_PrivateKey(keytype, a, pp, length);
  161. }