/* $OpenBSD: pk7_attr.c,v 1.12 2017/01/29 17:49:23 beck Exp $ */

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

 * project 2001.

 */

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

 * Copyright (c) 2001-2004 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 <stdlib.h>

#include <openssl/bio.h>

#include <openssl/asn1.h>

#include <openssl/asn1t.h>

#include <openssl/pem.h>

#include <openssl/pkcs7.h>

#include <openssl/x509.h>

#include <openssl/err.h>

int

PKCS7_add_attrib_smimecap(PKCS7_SIGNER_INFO *si, STACK_OF(X509_ALGOR) *cap)

{

  ASN1_STRING *seq;

  if (!(seq = ASN1_STRING_new())) {

    PKCS7error(ERR_R_MALLOC_FAILURE);

    return 0;

  }

  seq->length = ASN1_item_i2d((ASN1_VALUE *)cap, &seq->data,

      &X509_ALGORS_it);

  return PKCS7_add_signed_attribute(si, NID_SMIMECapabilities,

      V_ASN1_SEQUENCE, seq);

}

STACK_OF(X509_ALGOR) *

PKCS7_get_smimecap(PKCS7_SIGNER_INFO *si)

{

  ASN1_TYPE *cap;

  const unsigned char *p;

  cap = PKCS7_get_signed_attribute(si, NID_SMIMECapabilities);

  if (!cap || (cap->type != V_ASN1_SEQUENCE))

    return NULL;

  p = cap->value.sequence->data;

  return (STACK_OF(X509_ALGOR) *)

  ASN1_item_d2i(NULL, &p, cap->value.sequence->length,

      &X509_ALGORS_it);

}

/* Basic smime-capabilities OID and optional integer arg */

int

PKCS7_simple_smimecap(STACK_OF(X509_ALGOR) *sk, int nid, int arg)

{

  X509_ALGOR *alg;

  if (!(alg = X509_ALGOR_new())) {

    PKCS7error(ERR_R_MALLOC_FAILURE);

    return 0;

  }

  ASN1_OBJECT_free(alg->algorithm);

  alg->algorithm = OBJ_nid2obj(nid);

  if (arg > 0) {

    ASN1_INTEGER *nbit;

    if (!(alg->parameter = ASN1_TYPE_new()))

      goto err;

    if (!(nbit = ASN1_INTEGER_new()))

      goto err;

    if (!ASN1_INTEGER_set(nbit, arg)) {

      ASN1_INTEGER_free(nbit);

      goto err;

    }

    alg->parameter->value.integer = nbit;

    alg->parameter->type = V_ASN1_INTEGER;

  }

  if (sk_X509_ALGOR_push(sk, alg) == 0)

    goto err;

  return 1;

err:

  PKCS7error(ERR_R_MALLOC_FAILURE);

  X509_ALGOR_free(alg);

  return 0;

}

int

PKCS7_add_attrib_content_type(PKCS7_SIGNER_INFO *si, ASN1_OBJECT *coid)

{

  if (PKCS7_get_signed_attribute(si, NID_pkcs9_contentType))

    return 0;

  if (!coid)

    coid = OBJ_nid2obj(NID_pkcs7_data);

  return PKCS7_add_signed_attribute(si, NID_pkcs9_contentType,

      V_ASN1_OBJECT, coid);

}

int

PKCS7_add0_attrib_signing_time(PKCS7_SIGNER_INFO *si, ASN1_TIME *t)

{

  if (!t && !(t = X509_gmtime_adj(NULL, 0))) {

    PKCS7error(ERR_R_MALLOC_FAILURE);

    return 0;

  }

  return PKCS7_add_signed_attribute(si, NID_pkcs9_signingTime,

      V_ASN1_UTCTIME, t);

}

int

PKCS7_add1_attrib_digest(PKCS7_SIGNER_INFO *si, const unsigned char *md,

    int mdlen)

{

  ASN1_OCTET_STRING *os;

  os = ASN1_OCTET_STRING_new();

  if (!os)

    return 0;

  if (!ASN1_STRING_set(os, md, mdlen) ||

      !PKCS7_add_signed_attribute(si, NID_pkcs9_messageDigest,

      V_ASN1_OCTET_STRING, os)) {

    ASN1_OCTET_STRING_free(os);

    return 0;

  }

  return 1;

}