/* $OpenBSD: p12_add.c,v 1.15 2017/01/29 17:49:23 beck 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 <openssl/err.h>
#include <openssl/pkcs12.h>

/* Pack an object into an OCTET STRING and turn into a safebag */

PKCS12_SAFEBAG *
PKCS12_item_pack_safebag(void *obj, const ASN1_ITEM *it, int nid1, int nid2)
{
	PKCS12_BAGS *bag;
	PKCS12_SAFEBAG *safebag;

	if (!(bag = PKCS12_BAGS_new())) {
		PKCS12error(ERR_R_MALLOC_FAILURE);
		return NULL;
	}
	bag->type = OBJ_nid2obj(nid1);
	if (!ASN1_item_pack(obj, it, &bag->value.octet)) {
		PKCS12error(ERR_R_MALLOC_FAILURE);
		PKCS12_BAGS_free(bag);
		return NULL;
	}
	if (!(safebag = PKCS12_SAFEBAG_new())) {
		PKCS12error(ERR_R_MALLOC_FAILURE);
		PKCS12_BAGS_free(bag);
		return NULL;
	}
	safebag->value.bag = bag;
	safebag->type = OBJ_nid2obj(nid2);
	return safebag;
}

/* Turn PKCS8 object into a keybag */

PKCS12_SAFEBAG *
PKCS12_MAKE_KEYBAG(PKCS8_PRIV_KEY_INFO *p8)
{
	PKCS12_SAFEBAG *bag;

	if (!(bag = PKCS12_SAFEBAG_new())) {
		PKCS12error(ERR_R_MALLOC_FAILURE);
		return NULL;
	}
	bag->type = OBJ_nid2obj(NID_keyBag);
	bag->value.keybag = p8;
	return bag;
}

/* Turn PKCS8 object into a shrouded keybag */

PKCS12_SAFEBAG *
PKCS12_MAKE_SHKEYBAG(int pbe_nid, const char *pass, int passlen,
    unsigned char *salt, int saltlen, int iter, PKCS8_PRIV_KEY_INFO *p8)
{
	PKCS12_SAFEBAG *bag;
	const EVP_CIPHER *pbe_ciph;

	/* Set up the safe bag */
	if (!(bag = PKCS12_SAFEBAG_new())) {
		PKCS12error(ERR_R_MALLOC_FAILURE);
		return NULL;
	}

	bag->type = OBJ_nid2obj(NID_pkcs8ShroudedKeyBag);

	pbe_ciph = EVP_get_cipherbynid(pbe_nid);

	if (pbe_ciph)
		pbe_nid = -1;

	if (!(bag->value.shkeybag = PKCS8_encrypt(pbe_nid, pbe_ciph, pass,
	    passlen, salt, saltlen, iter, p8))) {
		PKCS12error(ERR_R_MALLOC_FAILURE);
		PKCS12_SAFEBAG_free(bag);
		return NULL;
	}

	return bag;
}

/* Turn a stack of SAFEBAGS into a PKCS#7 data Contentinfo */
PKCS7 *
PKCS12_pack_p7data(STACK_OF(PKCS12_SAFEBAG) *sk)
{
	PKCS7 *p7;

	if (!(p7 = PKCS7_new())) {
		PKCS12error(ERR_R_MALLOC_FAILURE);
		return NULL;
	}
	p7->type = OBJ_nid2obj(NID_pkcs7_data);
	if (!(p7->d.data = ASN1_OCTET_STRING_new())) {
		PKCS12error(ERR_R_MALLOC_FAILURE);
		goto err;
	}

	if (!ASN1_item_pack(sk, &PKCS12_SAFEBAGS_it, &p7->d.data)) {
		PKCS12error(PKCS12_R_CANT_PACK_STRUCTURE);
		goto err;
	}
	return p7;

err:
	PKCS7_free(p7);
	return NULL;
}

/* Unpack SAFEBAGS from PKCS#7 data ContentInfo */
STACK_OF(PKCS12_SAFEBAG) *
PKCS12_unpack_p7data(PKCS7 *p7)
{
	if (!PKCS7_type_is_data(p7)) {
		PKCS12error(PKCS12_R_CONTENT_TYPE_NOT_DATA);
		return NULL;
	}
	return ASN1_item_unpack(p7->d.data, &PKCS12_SAFEBAGS_it);
}

/* Turn a stack of SAFEBAGS into a PKCS#7 encrypted data ContentInfo */

PKCS7 *
PKCS12_pack_p7encdata(int pbe_nid, const char *pass, int passlen,
    unsigned char *salt, int saltlen, int iter, STACK_OF(PKCS12_SAFEBAG) *bags)
{
	PKCS7 *p7;
	X509_ALGOR *pbe;
	const EVP_CIPHER *pbe_ciph;

	if (!(p7 = PKCS7_new())) {
		PKCS12error(ERR_R_MALLOC_FAILURE);
		return NULL;
	}
	if (!PKCS7_set_type(p7, NID_pkcs7_encrypted)) {
		PKCS12error(PKCS12_R_ERROR_SETTING_ENCRYPTED_DATA_TYPE);
		goto err;
	}

	pbe_ciph = EVP_get_cipherbynid(pbe_nid);

	if (pbe_ciph)
		pbe = PKCS5_pbe2_set(pbe_ciph, iter, salt, saltlen);
	else
		pbe = PKCS5_pbe_set(pbe_nid, iter, salt, saltlen);

	if (!pbe) {
		PKCS12error(ERR_R_MALLOC_FAILURE);
		goto err;
	}
	X509_ALGOR_free(p7->d.encrypted->enc_data->algorithm);
	p7->d.encrypted->enc_data->algorithm = pbe;
	ASN1_OCTET_STRING_free(p7->d.encrypted->enc_data->enc_data);
	if (!(p7->d.encrypted->enc_data->enc_data = PKCS12_item_i2d_encrypt(
	    pbe, &PKCS12_SAFEBAGS_it, pass, passlen, bags, 1))) {
		PKCS12error(PKCS12_R_ENCRYPT_ERROR);
		goto err;
	}

	return p7;

err:
	PKCS7_free(p7);
	return NULL;
}

STACK_OF(PKCS12_SAFEBAG) *
PKCS12_unpack_p7encdata(PKCS7 *p7, const char *pass, int passlen)
{
	if (!PKCS7_type_is_encrypted(p7))
		return NULL;
	return PKCS12_item_decrypt_d2i(p7->d.encrypted->enc_data->algorithm,
	    &PKCS12_SAFEBAGS_it, pass, passlen,
	    p7->d.encrypted->enc_data->enc_data, 1);
}

PKCS8_PRIV_KEY_INFO *
PKCS12_decrypt_skey(PKCS12_SAFEBAG *bag, const char *pass, int passlen)
{
	return PKCS8_decrypt(bag->value.shkeybag, pass, passlen);
}

int
PKCS12_pack_authsafes(PKCS12 *p12, STACK_OF(PKCS7) *safes)
{
	if (ASN1_item_pack(safes, &PKCS12_AUTHSAFES_it,
	    &p12->authsafes->d.data))
		return 1;
	return 0;
}

STACK_OF(PKCS7) *
PKCS12_unpack_authsafes(PKCS12 *p12)
{
	if (!PKCS7_type_is_data(p12->authsafes)) {
		PKCS12error(PKCS12_R_CONTENT_TYPE_NOT_DATA);
		return NULL;
	}
	return ASN1_item_unpack(p12->authsafes->d.data,
	    &PKCS12_AUTHSAFES_it);
}
