p12_decr.c 5.8 KB

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  1. /* p12_decr.c */
  2. /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
  3. * project 1999.
  4. */
  5. /* ====================================================================
  6. * Copyright (c) 1999 The OpenSSL Project. All rights reserved.
  7. *
  8. * Redistribution and use in source and binary forms, with or without
  9. * modification, are permitted provided that the following conditions
  10. * are met:
  11. *
  12. * 1. Redistributions of source code must retain the above copyright
  13. * notice, this list of conditions and the following disclaimer.
  14. *
  15. * 2. Redistributions in binary form must reproduce the above copyright
  16. * notice, this list of conditions and the following disclaimer in
  17. * the documentation and/or other materials provided with the
  18. * distribution.
  19. *
  20. * 3. All advertising materials mentioning features or use of this
  21. * software must display the following acknowledgment:
  22. * "This product includes software developed by the OpenSSL Project
  23. * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
  24. *
  25. * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  26. * endorse or promote products derived from this software without
  27. * prior written permission. For written permission, please contact
  28. * licensing@OpenSSL.org.
  29. *
  30. * 5. Products derived from this software may not be called "OpenSSL"
  31. * nor may "OpenSSL" appear in their names without prior written
  32. * permission of the OpenSSL Project.
  33. *
  34. * 6. Redistributions of any form whatsoever must retain the following
  35. * acknowledgment:
  36. * "This product includes software developed by the OpenSSL Project
  37. * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
  38. *
  39. * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  40. * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  41. * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  42. * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
  43. * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  44. * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  45. * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  46. * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  47. * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  48. * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  49. * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  50. * OF THE POSSIBILITY OF SUCH DAMAGE.
  51. * ====================================================================
  52. *
  53. * This product includes cryptographic software written by Eric Young
  54. * (eay@cryptsoft.com). This product includes software written by Tim
  55. * Hudson (tjh@cryptsoft.com).
  56. *
  57. */
  58. #include <stdio.h>
  59. #include "cryptlib.h"
  60. #include <openssl/pkcs12.h>
  61. /* Define this to dump decrypted output to files called DERnnn */
  62. /*#define DEBUG_DECRYPT*/
  63. /* Encrypt/Decrypt a buffer based on password and algor, result in a
  64. * OPENSSL_malloc'ed buffer
  65. */
  66. unsigned char * PKCS12_pbe_crypt(X509_ALGOR *algor, const char *pass,
  67. int passlen, unsigned char *in, int inlen, unsigned char **data,
  68. int *datalen, int en_de)
  69. {
  70. unsigned char *out;
  71. int outlen, i;
  72. EVP_CIPHER_CTX ctx;
  73. EVP_CIPHER_CTX_init(&ctx);
  74. /* Decrypt data */
  75. if (!EVP_PBE_CipherInit(algor->algorithm, pass, passlen,
  76. algor->parameter, &ctx, en_de)) {
  77. PKCS12err(PKCS12_F_PKCS12_PBE_CRYPT,PKCS12_R_PKCS12_ALGOR_CIPHERINIT_ERROR);
  78. return NULL;
  79. }
  80. if(!(out = OPENSSL_malloc(inlen + EVP_CIPHER_CTX_block_size(&ctx)))) {
  81. PKCS12err(PKCS12_F_PKCS12_PBE_CRYPT,ERR_R_MALLOC_FAILURE);
  82. goto err;
  83. }
  84. if (!EVP_CipherUpdate(&ctx, out, &i, in, inlen))
  85. {
  86. OPENSSL_free(out);
  87. out = NULL;
  88. PKCS12err(PKCS12_F_PKCS12_PBE_CRYPT,ERR_R_EVP_LIB);
  89. goto err;
  90. }
  91. outlen = i;
  92. if(!EVP_CipherFinal_ex(&ctx, out + i, &i)) {
  93. OPENSSL_free(out);
  94. out = NULL;
  95. PKCS12err(PKCS12_F_PKCS12_PBE_CRYPT,PKCS12_R_PKCS12_CIPHERFINAL_ERROR);
  96. goto err;
  97. }
  98. outlen += i;
  99. if (datalen) *datalen = outlen;
  100. if (data) *data = out;
  101. err:
  102. EVP_CIPHER_CTX_cleanup(&ctx);
  103. return out;
  104. }
  105. /* Decrypt an OCTET STRING and decode ASN1 structure
  106. * if zbuf set zero buffer after use.
  107. */
  108. void * PKCS12_item_decrypt_d2i(X509_ALGOR *algor, const ASN1_ITEM *it,
  109. const char *pass, int passlen, ASN1_OCTET_STRING *oct, int zbuf)
  110. {
  111. unsigned char *out;
  112. const unsigned char *p;
  113. void *ret;
  114. int outlen;
  115. if (!PKCS12_pbe_crypt(algor, pass, passlen, oct->data, oct->length,
  116. &out, &outlen, 0)) {
  117. PKCS12err(PKCS12_F_PKCS12_ITEM_DECRYPT_D2I,PKCS12_R_PKCS12_PBE_CRYPT_ERROR);
  118. return NULL;
  119. }
  120. p = out;
  121. #ifdef DEBUG_DECRYPT
  122. {
  123. FILE *op;
  124. char fname[30];
  125. static int fnm = 1;
  126. sprintf(fname, "DER%d", fnm++);
  127. op = fopen(fname, "wb");
  128. fwrite (p, 1, outlen, op);
  129. fclose(op);
  130. }
  131. #endif
  132. ret = ASN1_item_d2i(NULL, &p, outlen, it);
  133. if (zbuf) OPENSSL_cleanse(out, outlen);
  134. if(!ret) PKCS12err(PKCS12_F_PKCS12_ITEM_DECRYPT_D2I,PKCS12_R_DECODE_ERROR);
  135. OPENSSL_free(out);
  136. return ret;
  137. }
  138. /* Encode ASN1 structure and encrypt, return OCTET STRING
  139. * if zbuf set zero encoding.
  140. */
  141. ASN1_OCTET_STRING *PKCS12_item_i2d_encrypt(X509_ALGOR *algor, const ASN1_ITEM *it,
  142. const char *pass, int passlen,
  143. void *obj, int zbuf)
  144. {
  145. ASN1_OCTET_STRING *oct;
  146. unsigned char *in = NULL;
  147. int inlen;
  148. if (!(oct = M_ASN1_OCTET_STRING_new ())) {
  149. PKCS12err(PKCS12_F_PKCS12_ITEM_I2D_ENCRYPT,ERR_R_MALLOC_FAILURE);
  150. return NULL;
  151. }
  152. inlen = ASN1_item_i2d(obj, &in, it);
  153. if (!in) {
  154. PKCS12err(PKCS12_F_PKCS12_ITEM_I2D_ENCRYPT,PKCS12_R_ENCODE_ERROR);
  155. return NULL;
  156. }
  157. if (!PKCS12_pbe_crypt(algor, pass, passlen, in, inlen, &oct->data,
  158. &oct->length, 1)) {
  159. PKCS12err(PKCS12_F_PKCS12_ITEM_I2D_ENCRYPT,PKCS12_R_ENCRYPT_ERROR);
  160. OPENSSL_free(in);
  161. return NULL;
  162. }
  163. if (zbuf) OPENSSL_cleanse(in, inlen);
  164. OPENSSL_free(in);
  165. return oct;
  166. }
  167. IMPLEMENT_PKCS12_STACK_OF(PKCS7)