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/* $OpenBSD: p12_decr.c,v 1.19 2018/05/13 14:22:34 tb Exp $ */
/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
* project 1999.
*/
/* ====================================================================
* Copyright (c) 1999 The OpenSSL Project. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. All advertising materials mentioning features or use of this
* software must display the following acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
*
* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
* endorse or promote products derived from this software without
* prior written permission. For written permission, please contact
* licensing@OpenSSL.org.
*
* 5. Products derived from this software may not be called "OpenSSL"
* nor may "OpenSSL" appear in their names without prior written
* permission of the OpenSSL Project.
*
* 6. Redistributions of any form whatsoever must retain the following
* acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
*
* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
* ====================================================================
*
* This product includes cryptographic software written by Eric Young
* (eay@cryptsoft.com). This product includes software written by Tim
* Hudson (tjh@cryptsoft.com).
*
*/
#include <stdio.h>
#include <string.h>
#include <openssl/err.h>
#include <openssl/pkcs12.h>
/* Encrypt/Decrypt a buffer based on password and algor, result in a
* malloc'ed buffer
*/
unsigned char *
PKCS12_pbe_crypt(const X509_ALGOR *algor, const char *pass, int passlen,
const unsigned char *in, int inlen, unsigned char **data, int *datalen,
int en_de)
{
unsigned char *out;
int outlen, i;
EVP_CIPHER_CTX ctx;
EVP_CIPHER_CTX_init(&ctx);
/* Decrypt data */
if (!EVP_PBE_CipherInit(algor->algorithm, pass, passlen,
algor->parameter, &ctx, en_de)) {
out = NULL;
PKCS12error(PKCS12_R_PKCS12_ALGOR_CIPHERINIT_ERROR);
goto err;
}
if (!(out = malloc(inlen + EVP_CIPHER_CTX_block_size(&ctx)))) {
PKCS12error(ERR_R_MALLOC_FAILURE);
goto err;
}
if (!EVP_CipherUpdate(&ctx, out, &i, in, inlen)) {
free(out);
out = NULL;
PKCS12error(ERR_R_EVP_LIB);
goto err;
}
outlen = i;
if (!EVP_CipherFinal_ex(&ctx, out + i, &i)) {
free(out);
out = NULL;
PKCS12error(PKCS12_R_PKCS12_CIPHERFINAL_ERROR);
goto err;
}
outlen += i;
if (datalen)
*datalen = outlen;
if (data)
*data = out;
err:
EVP_CIPHER_CTX_cleanup(&ctx);
return out;
}
/* Decrypt an OCTET STRING and decode ASN1 structure
* if zbuf set zero buffer after use.
*/
void *
PKCS12_item_decrypt_d2i(const X509_ALGOR *algor, const ASN1_ITEM *it,
const char *pass, int passlen, const ASN1_OCTET_STRING *oct, int zbuf)
{
unsigned char *out;
const unsigned char *p;
void *ret;
int outlen;
if (!PKCS12_pbe_crypt(algor, pass, passlen, oct->data, oct->length,
&out, &outlen, 0)) {
PKCS12error(PKCS12_R_PKCS12_PBE_CRYPT_ERROR);
return NULL;
}
p = out;
ret = ASN1_item_d2i(NULL, &p, outlen, it);
if (zbuf)
explicit_bzero(out, outlen);
if (!ret)
PKCS12error(PKCS12_R_DECODE_ERROR);
free(out);
return ret;
}
/* Encode ASN1 structure and encrypt, return OCTET STRING
* if zbuf set zero encoding.
*/
ASN1_OCTET_STRING *
PKCS12_item_i2d_encrypt(X509_ALGOR *algor, const ASN1_ITEM *it,
const char *pass, int passlen,
void *obj, int zbuf)
{
ASN1_OCTET_STRING *oct;
unsigned char *in = NULL;
int inlen;
if (!(oct = ASN1_OCTET_STRING_new ())) {
PKCS12error(ERR_R_MALLOC_FAILURE);
return NULL;
}
inlen = ASN1_item_i2d(obj, &in, it);
if (!in) {
PKCS12error(PKCS12_R_ENCODE_ERROR);
goto err;
}
if (!PKCS12_pbe_crypt(algor, pass, passlen, in, inlen, &oct->data,
&oct->length, 1)) {
PKCS12error(PKCS12_R_ENCRYPT_ERROR);
goto err;
}
if (zbuf)
explicit_bzero(in, inlen);
free(in);
return oct;
err:
free(in);
ASN1_OCTET_STRING_free(oct);
return NULL;
}
IMPLEMENT_PKCS12_STACK_OF(PKCS7)
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