crypto/libressl/crypto/pkcs12/p12_decr.c

   1 /* $OpenBSD: p12_decr.c,v 1.16 2015/09/10 15:56:25 jsing Exp $ */
   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
  59 #include <stdio.h>
  60 #include <string.h>
  61
  62 #include <openssl/err.h>
  63 #include <openssl/pkcs12.h>
  64
  65 /* Encrypt/Decrypt a buffer based on password and algor, result in a
  66  * malloc'ed buffer
  67  */
  68
  69 unsigned char *
  70 PKCS12_pbe_crypt(X509_ALGOR *algor, const char *pass, int passlen,
  71     unsigned char *in, int inlen, unsigned char **data, int *datalen, int en_de)
  72 {
  73         unsigned char *out;
  74         int outlen, i;
  75         EVP_CIPHER_CTX ctx;
  76
  77         EVP_CIPHER_CTX_init(&ctx);
  78         /* Decrypt data */
  79         if (!EVP_PBE_CipherInit(algor->algorithm, pass, passlen,
  80             algor->parameter, &ctx, en_de)) {
  81                 out = NULL;
  82                 PKCS12err(PKCS12_F_PKCS12_PBE_CRYPT,
  83                     PKCS12_R_PKCS12_ALGOR_CIPHERINIT_ERROR);
  84                 goto err;
  85         }
  86
  87         if (!(out = malloc(inlen + EVP_CIPHER_CTX_block_size(&ctx)))) {
  88                 PKCS12err(PKCS12_F_PKCS12_PBE_CRYPT, ERR_R_MALLOC_FAILURE);
  89                 goto err;
  90         }
  91
  92         if (!EVP_CipherUpdate(&ctx, out, &i, in, inlen)) {
  93                 free(out);
  94                 out = NULL;
  95                 PKCS12err(PKCS12_F_PKCS12_PBE_CRYPT, ERR_R_EVP_LIB);
  96                 goto err;
  97         }
  98
  99         outlen = i;
 100         if (!EVP_CipherFinal_ex(&ctx, out + i, &i)) {
 101                 free(out);
 102                 out = NULL;
 103                 PKCS12err(PKCS12_F_PKCS12_PBE_CRYPT,
 104                     PKCS12_R_PKCS12_CIPHERFINAL_ERROR);
 105                 goto err;
 106         }
 107         outlen += i;
 108         if (datalen)
 109                 *datalen = outlen;
 110         if (data)
 111                 *data = out;
 112
 113 err:
 114         EVP_CIPHER_CTX_cleanup(&ctx);
 115         return out;
 116
 117 }
 118
 119 /* Decrypt an OCTET STRING and decode ASN1 structure
 120  * if zbuf set zero buffer after use.
 121  */
 122
 123 void *
 124 PKCS12_item_decrypt_d2i(X509_ALGOR *algor, const ASN1_ITEM *it,
 125     const char *pass, int passlen, ASN1_OCTET_STRING *oct, int zbuf)
 126 {
 127         unsigned char *out;
 128         const unsigned char *p;
 129         void *ret;
 130         int outlen;
 131
 132         if (!PKCS12_pbe_crypt(algor, pass, passlen, oct->data, oct->length,
 133             &out, &outlen, 0)) {
 134                 PKCS12err(PKCS12_F_PKCS12_ITEM_DECRYPT_D2I,
 135                     PKCS12_R_PKCS12_PBE_CRYPT_ERROR);
 136                 return NULL;
 137         }
 138         p = out;
 139         ret = ASN1_item_d2i(NULL, &p, outlen, it);
 140         if (zbuf)
 141                 explicit_bzero(out, outlen);
 142         if (!ret)
 143                 PKCS12err(PKCS12_F_PKCS12_ITEM_DECRYPT_D2I,
 144                     PKCS12_R_DECODE_ERROR);
 145         free(out);
 146         return ret;
 147 }
 148
 149 /* Encode ASN1 structure and encrypt, return OCTET STRING
 150  * if zbuf set zero encoding.
 151  */
 152
 153 ASN1_OCTET_STRING *
 154 PKCS12_item_i2d_encrypt(X509_ALGOR *algor, const ASN1_ITEM *it,
 155     const char *pass, int passlen,
 156     void *obj, int zbuf)
 157 {
 158         ASN1_OCTET_STRING *oct;
 159         unsigned char *in = NULL;
 160         int inlen;
 161
 162         if (!(oct = ASN1_OCTET_STRING_new ())) {
 163                 PKCS12err(PKCS12_F_PKCS12_ITEM_I2D_ENCRYPT,
 164                     ERR_R_MALLOC_FAILURE);
 165                 return NULL;
 166         }
 167         inlen = ASN1_item_i2d(obj, &in, it);
 168         if (!in) {
 169                 PKCS12err(PKCS12_F_PKCS12_ITEM_I2D_ENCRYPT,
 170                     PKCS12_R_ENCODE_ERROR);
 171                 goto err;
 172         }
 173         if (!PKCS12_pbe_crypt(algor, pass, passlen, in, inlen, &oct->data,
 174             &oct->length, 1)) {
 175                 PKCS12err(PKCS12_F_PKCS12_ITEM_I2D_ENCRYPT,
 176                     PKCS12_R_ENCRYPT_ERROR);
 177                 goto err;
 178         }
 179         if (zbuf)
 180                 explicit_bzero(in, inlen);
 181         free(in);
 182         return oct;
 183
 184 err:
 185         free(in);
 186         ASN1_OCTET_STRING_free(oct);
 187         return NULL;
 188 }
 189
 190 IMPLEMENT_PKCS12_STACK_OF(PKCS7)