crypto/cms/cms_io.c

/* crypto/cms/cms_io.c */
/* 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
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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
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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"

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)

/* Callback for int_smime_write_ASN1 */

static int cms_output_data(BIO *out, BIO *data, ASN1_VALUE *val, int flags,
					const ASN1_ITEM *it)
	{
	CMS_ContentInfo *cms = (CMS_ContentInfo *)val;
	BIO *tmpbio, *cmsbio;
	int r = 0;

	if (!(flags & SMIME_DETACHED))
		{
		SMIME_crlf_copy(data, out, flags);
		return 1;
		}

	/* Let CMS code prepend any needed BIOs */

	cmsbio = CMS_dataInit(cms, out);

	if (!cmsbio)
		return 0;

	/* Copy data across, passing through filter BIOs for processing */
	SMIME_crlf_copy(data, cmsbio, flags);

	/* Finalize structure */
	if (CMS_dataFinal(cms, cmsbio) <= 0)
		goto err;

	r = 1;

	err:

	/* Now remove any digests prepended to the BIO */

	while (cmsbio != out)
		{
		tmpbio = BIO_pop(cmsbio);
		BIO_free(cmsbio);
		cmsbio = tmpbio;
		}

	return 1;

	}


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 int_smime_write_ASN1(bio, (ASN1_VALUE *)cms, data, flags,
					ctype_nid, econt_nid, mdalgs,
					cms_output_data,
					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));
	}