/* crypto/pkcs7/enc.c */

/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)

 * All rights reserved.

 *

 * This package is an SSL implementation written

 * by Eric Young (eay@cryptsoft.com).

 * The implementation was written so as to conform with Netscapes SSL.

 * 

 * This library is free for commercial and non-commercial use as long as

 * the following conditions are aheared to.  The following conditions

 * apply to all code found in this distribution, be it the RC4, RSA,

 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation

 * included with this distribution is covered by the same copyright terms

 * except that the holder is Tim Hudson (tjh@cryptsoft.com).

 * 

 * Copyright remains Eric Young's, and as such any Copyright notices in

 * the code are not to be removed.

 * If this package is used in a product, Eric Young should be given attribution

 * as the author of the parts of the library used.

 * This can be in the form of a textual message at program startup or

 * in documentation (online or textual) provided with the package.

 * 

 * 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 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 acknowledgement:

 *    "This product includes cryptographic software written by

 *     Eric Young (eay@cryptsoft.com)"

 *    The word 'cryptographic' can be left out if the rouines from the library

 *    being used are not cryptographic related :-).

 * 4. If you include any Windows specific code (or a derivative thereof) from 

 *    the apps directory (application code) you must include an acknowledgement:

 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"

 * 

 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND

 * ANY EXPRESS 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 AUTHOR OR 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.

 * 

 * The licence and distribution terms for any publically available version or

 * derivative of this code cannot be changed.  i.e. this code cannot simply be

 * copied and put under another distribution licence

 * [including the GNU Public Licence.]

 */

#include <stdio.h>

#include <string.h>

#include <openssl/bio.h>

#include <openssl/x509.h>

#include <openssl/pem.h>

#include <openssl/err.h>

int main(argc,argv)

int argc;

char *argv[];

	{

	X509 *x509;

	PKCS7 *p7;

	BIO *in;

	BIO *data,*p7bio;

	char buf[1024*4];

	int i;

	int nodetach=1;

	char *keyfile = NULL;

	const EVP_CIPHER *cipher=NULL;

	STACK_OF(X509) *recips=NULL;

	OpenSSL_add_all_algorithms();

	data=BIO_new(BIO_s_file());

	while(argc > 1)

		{

		if (strcmp(argv[1],"-nd") == 0)

			{

			nodetach=1;

			argv++; argc--;

			}

		else if ((strcmp(argv[1],"-c") == 0) && (argc >= 2)) {

			if(!(cipher = EVP_get_cipherbyname(argv[2]))) {

				fprintf(stderr, "Unknown cipher %s\n", argv[2]);

				goto err;

			}

			argc-=2;

			argv+=2;

		} else if ((strcmp(argv[1],"-k") == 0) && (argc >= 2)) {

			keyfile = argv[2];

			argc-=2;

			argv+=2;

			if (!(in=BIO_new_file(keyfile,"r"))) goto err;

			if (!(x509=PEM_read_bio_X509(in,NULL,NULL,NULL)))

				goto err;

			if(!recips) recips = sk_X509_new_null();

			sk_X509_push(recips, x509);

			BIO_free(in);

		} else break;

	}

	if(!recips) {

		fprintf(stderr, "No recipients\n");

		goto err;

	}

	if (!BIO_read_filename(data,argv[1])) goto err;

	p7=PKCS7_new();

#if 0

	BIO_reset(in);

	if ((pkey=PEM_read_bio_PrivateKey(in,NULL,NULL)) == NULL) goto err;

	BIO_free(in);

	PKCS7_set_type(p7,NID_pkcs7_signedAndEnveloped);

	if (PKCS7_add_signature(p7,x509,pkey,EVP_sha1()) == NULL) goto err;

	/* we may want to add more */

	PKCS7_add_certificate(p7,x509);

#else

	PKCS7_set_type(p7,NID_pkcs7_enveloped);

#endif

	if(!cipher)	{

#ifndef OPENSSL_NO_DES

		cipher = EVP_des_ede3_cbc();

#else

		fprintf(stderr, "No cipher selected\n");

		goto err;

#endif

	}

	if (!PKCS7_set_cipher(p7,cipher)) goto err;

	for(i = 0; i < sk_X509_num(recips); i++) {

		if (!PKCS7_add_recipient(p7,sk_X509_value(recips, i))) goto err;

	}

	sk_X509_pop_free(recips, X509_free);

	/* Set the content of the signed to 'data' */

	/* PKCS7_content_new(p7,NID_pkcs7_data); not used in envelope */

	/* could be used, but not in this version :-)

	if (!nodetach) PKCS7_set_detached(p7,1);

	*/

	if ((p7bio=PKCS7_dataInit(p7,NULL)) == NULL) goto err;

	for (;;)

		{

		i=BIO_read(data,buf,sizeof(buf));

		if (i <= 0) break;

		BIO_write(p7bio,buf,i);

		}

	BIO_flush(p7bio);

	if (!PKCS7_dataFinal(p7,p7bio)) goto err;

	BIO_free(p7bio);

	PEM_write_PKCS7(stdout,p7);

	PKCS7_free(p7);

	exit(0);

err:

	ERR_load_crypto_strings();

	ERR_print_errors_fp(stderr);

	exit(1);

	}