/* $OpenBSD: cms_io.c,v 1.3 2014/06/12 15:49:28 deraadt Exp $ */
/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
 * project.
 */
/* ====================================================================
 * Copyright (c) 2008 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.
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 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
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 *    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.
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 * 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/)"
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 * 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
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 */

#include <openssl/asn1t.h>
#include <openssl/x509.h>
#include <openssl/err.h>
#include <openssl/pem.h>
#include "cms.h"
#include "cms_lcl.h"

int
CMS_stream(unsigned char ***boundary, CMS_ContentInfo *cms)
{
	ASN1_OCTET_STRING **pos;

	pos = CMS_get0_content(cms);
	if (!pos)
		return 0;
	if (!*pos)
		*pos = ASN1_OCTET_STRING_new();
	if (*pos) {
		(*pos)->flags |= ASN1_STRING_FLAG_NDEF;
		(*pos)->flags &= ~ASN1_STRING_FLAG_CONT;
		*boundary = &(*pos)->data;
		return 1;
	}
	CMSerr(CMS_F_CMS_STREAM, ERR_R_MALLOC_FAILURE);
	return 0;
}

CMS_ContentInfo *
d2i_CMS_bio(BIO *bp, CMS_ContentInfo **cms)
{
	return ASN1_item_d2i_bio(ASN1_ITEM_rptr(CMS_ContentInfo), bp, cms);
}

int
i2d_CMS_bio(BIO *bp, CMS_ContentInfo *cms)
{
	return ASN1_item_i2d_bio(ASN1_ITEM_rptr(CMS_ContentInfo), bp, cms);
}

IMPLEMENT_PEM_rw_const(CMS, CMS_ContentInfo, PEM_STRING_CMS, CMS_ContentInfo)

BIO *
BIO_new_CMS(BIO *out, CMS_ContentInfo *cms)
{
	return BIO_new_NDEF(out, (ASN1_VALUE *)cms,
	    ASN1_ITEM_rptr(CMS_ContentInfo));
}

/* CMS wrappers round generalised stream and MIME routines */

int
i2d_CMS_bio_stream(BIO *out, CMS_ContentInfo *cms, BIO *in, int flags)
{
	return i2d_ASN1_bio_stream(out, (ASN1_VALUE *)cms, in, flags,
	    ASN1_ITEM_rptr(CMS_ContentInfo));
}

int
PEM_write_bio_CMS_stream(BIO *out, CMS_ContentInfo *cms, BIO *in, int flags)
{
	return PEM_write_bio_ASN1_stream(out, (ASN1_VALUE *) cms, in, flags,
	    "CMS", ASN1_ITEM_rptr(CMS_ContentInfo));
}

int
SMIME_write_CMS(BIO *bio, CMS_ContentInfo *cms, BIO *data, int flags)
{
	STACK_OF(X509_ALGOR) *mdalgs;
	int ctype_nid = OBJ_obj2nid(cms->contentType);
	int econt_nid = OBJ_obj2nid(CMS_get0_eContentType(cms));

	if (ctype_nid == NID_pkcs7_signed)
		mdalgs = cms->d.signedData->digestAlgorithms;
	else
		mdalgs = NULL;

	return SMIME_write_ASN1(bio, (ASN1_VALUE *)cms, data, flags,
	    ctype_nid, econt_nid, mdalgs, ASN1_ITEM_rptr(CMS_ContentInfo));
}

CMS_ContentInfo *
SMIME_read_CMS(BIO *bio, BIO **bcont)
{
	return (CMS_ContentInfo *)SMIME_read_ASN1(bio, bcont,
	    ASN1_ITEM_rptr(CMS_ContentInfo));
}