/* $OpenBSD: p8_pkey.c,v 1.25 2024/07/08 14:48:49 beck Exp $ */

/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL

 * project 1999.

 */

/* ====================================================================

 * Copyright (c) 1999-2005 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/asn1t.h>

#include <openssl/x509.h>

#include "x509_local.h"

/* Minor tweak to operation: zero private key data */

static int

pkey_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it, void *exarg)

{

  /* Since the structure must still be valid use ASN1_OP_FREE_PRE */

  if (operation == ASN1_OP_FREE_PRE) {

    PKCS8_PRIV_KEY_INFO *key = (PKCS8_PRIV_KEY_INFO *)*pval;

    if (key->pkey != NULL)

      explicit_bzero(key->pkey->data, key->pkey->length);

  }

  return 1;

}

static const ASN1_AUX PKCS8_PRIV_KEY_INFO_aux = {

  .asn1_cb = pkey_cb,

};

static const ASN1_TEMPLATE PKCS8_PRIV_KEY_INFO_seq_tt[] = {

  {

    .offset = offsetof(PKCS8_PRIV_KEY_INFO, version),

    .field_name = "version",

    .item = &ASN1_INTEGER_it,

  },

  {

    .offset = offsetof(PKCS8_PRIV_KEY_INFO, pkeyalg),

    .field_name = "pkeyalg",

    .item = &X509_ALGOR_it,

  },

  {

    .offset = offsetof(PKCS8_PRIV_KEY_INFO, pkey),

    .field_name = "pkey",

    .item = &ASN1_OCTET_STRING_it,

  },

  {

    .flags = ASN1_TFLG_IMPLICIT | ASN1_TFLG_SET_OF | ASN1_TFLG_OPTIONAL,

    .offset = offsetof(PKCS8_PRIV_KEY_INFO, attributes),

    .field_name = "attributes",

    .item = &X509_ATTRIBUTE_it,

  },

};

const ASN1_ITEM PKCS8_PRIV_KEY_INFO_it = {

  .itype = ASN1_ITYPE_SEQUENCE,

  .utype = V_ASN1_SEQUENCE,

  .templates = PKCS8_PRIV_KEY_INFO_seq_tt,

  .tcount = sizeof(PKCS8_PRIV_KEY_INFO_seq_tt) / sizeof(ASN1_TEMPLATE),

  .funcs = &PKCS8_PRIV_KEY_INFO_aux,

  .size = sizeof(PKCS8_PRIV_KEY_INFO),

  .sname = "PKCS8_PRIV_KEY_INFO",

};

LCRYPTO_ALIAS(PKCS8_PRIV_KEY_INFO_it);

PKCS8_PRIV_KEY_INFO *

d2i_PKCS8_PRIV_KEY_INFO(PKCS8_PRIV_KEY_INFO **a, const unsigned char **in, long len)

{

  return (PKCS8_PRIV_KEY_INFO *)ASN1_item_d2i((ASN1_VALUE **)a, in, len,

      &PKCS8_PRIV_KEY_INFO_it);

}

LCRYPTO_ALIAS(d2i_PKCS8_PRIV_KEY_INFO);

int

i2d_PKCS8_PRIV_KEY_INFO(PKCS8_PRIV_KEY_INFO *a, unsigned char **out)

{

  return ASN1_item_i2d((ASN1_VALUE *)a, out, &PKCS8_PRIV_KEY_INFO_it);

}

LCRYPTO_ALIAS(i2d_PKCS8_PRIV_KEY_INFO);

PKCS8_PRIV_KEY_INFO *

PKCS8_PRIV_KEY_INFO_new(void)

{

  return (PKCS8_PRIV_KEY_INFO *)ASN1_item_new(&PKCS8_PRIV_KEY_INFO_it);

}

LCRYPTO_ALIAS(PKCS8_PRIV_KEY_INFO_new);

void

PKCS8_PRIV_KEY_INFO_free(PKCS8_PRIV_KEY_INFO *a)

{

  ASN1_item_free((ASN1_VALUE *)a, &PKCS8_PRIV_KEY_INFO_it);

}

LCRYPTO_ALIAS(PKCS8_PRIV_KEY_INFO_free);

int

PKCS8_pkey_set0(PKCS8_PRIV_KEY_INFO *priv, ASN1_OBJECT *aobj, int version,

    int ptype, void *pval, unsigned char *penc, int penclen)

{

  if (version >= 0) {

    if (!ASN1_INTEGER_set(priv->version, version))

      return 0;

  }

  if (!X509_ALGOR_set0(priv->pkeyalg, aobj, ptype, pval))

    return 0;

  if (penc != NULL)

    ASN1_STRING_set0(priv->pkey, penc, penclen);

  return 1;

}

LCRYPTO_ALIAS(PKCS8_pkey_set0);

int

PKCS8_pkey_get0(const ASN1_OBJECT **ppkalg, const unsigned char **pk,

    int *ppklen, const X509_ALGOR **pa, const PKCS8_PRIV_KEY_INFO *p8)

{

  if (ppkalg != NULL)

    *ppkalg = p8->pkeyalg->algorithm;

  if (pk != NULL) {

    *pk = ASN1_STRING_data(p8->pkey);

    *ppklen = ASN1_STRING_length(p8->pkey);

  }

  if (pa != NULL)

    *pa = p8->pkeyalg;

  return 1;

}

LCRYPTO_ALIAS(PKCS8_pkey_get0);

const STACK_OF(X509_ATTRIBUTE) *

PKCS8_pkey_get0_attrs(const PKCS8_PRIV_KEY_INFO *p8)

{

  return p8->attributes;

}

LCRYPTO_ALIAS(PKCS8_pkey_get0_attrs);

int

PKCS8_pkey_add1_attr_by_NID(PKCS8_PRIV_KEY_INFO *p8, int nid, int type,

    const unsigned char *bytes, int len)

{

  if (X509at_add1_attr_by_NID(&p8->attributes, nid, type, bytes,

      len) != NULL)

    return 1;

  return 0;

}

LCRYPTO_ALIAS(PKCS8_pkey_add1_attr_by_NID);