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Remove all duplicate prototypes for *_main functions (these are already
provided by progs.h). Also, move the FUNCTION type (and flags) into
openssl.c since that is the only place of use. Lastly, remove pointless
'extern' from the prototypes and use char **argv instead of char *argv[]
(the former is used elsewhere).

ok deraadt@ doug@

/* $OpenBSD: pkcs7.c,v 1.5 2015/08/22 16:36:05 jsing Exp $ */
/* 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 <stdlib.h>
#include <string.h>
#include <time.h>

#include "apps.h"

#include <openssl/err.h>
#include <openssl/evp.h>
#include <openssl/objects.h>
#include <openssl/pem.h>
#include <openssl/pkcs7.h>
#include <openssl/x509.h>

static struct {
#ifndef OPENSSL_NO_ENGINE
	char *engine;
#endif
	char *infile;
	int informat;
	int noout;
	char *outfile;
	int outformat;
	int p7_print;
	int print_certs;
	int text;
} pkcs7_config;

static struct option pkcs7_options[] = {
#ifndef OPENSSL_NO_ENGINE
	{
		.name = "engine",
		.argname = "id",
		.desc = "Use the engine specified by the given identifier",
		.type = OPTION_ARG,
		.opt.arg = &pkcs7_config.engine,
	},
#endif
	{
		.name = "in",
		.argname = "file",
		.desc = "Input file (default stdin)",
		.type = OPTION_ARG,
		.opt.arg = &pkcs7_config.infile,
	},
	{
		.name = "inform",
		.argname = "format",
		.desc = "Input format (DER or PEM (default))",
		.type = OPTION_ARG_FORMAT,
		.opt.value = &pkcs7_config.informat,
	},
	{
		.name = "noout",
		.desc = "Do not output encoded version of PKCS#7 structure",
		.type = OPTION_FLAG,
		.opt.flag = &pkcs7_config.noout,
	},
	{
		.name = "out",
		.argname = "file",
		.desc = "Output file (default stdout)",
		.type = OPTION_ARG,
		.opt.arg = &pkcs7_config.outfile,
	},
	{
		.name = "outform",
		.argname = "format",
		.desc = "Output format (DER or PEM (default))",
		.type = OPTION_ARG_FORMAT,
		.opt.value = &pkcs7_config.outformat,
	},
	{
		.name = "print",
		.desc = "Output ASN.1 representation of PKCS#7 structure",
		.type = OPTION_FLAG,
		.opt.flag = &pkcs7_config.p7_print,
	},
	{
		.name = "print_certs",
		.desc = "Print out any certificates or CRLs contained in file",
		.type = OPTION_FLAG,
		.opt.flag = &pkcs7_config.print_certs,
	},
	{
		.name = "text",
		.desc = "Print out full certificate details",
		.type = OPTION_FLAG,
		.opt.flag = &pkcs7_config.text,
	},
	{ NULL },
};

static void
pkcs7_usage()
{
	fprintf(stderr, "usage: pkcs7 [-engine id] [-in file] "
	    "[-inform DER | PEM] [-noout]\n"
	    "    [-out file] [-outform DER | PEM] [-print_certs] [-text]\n\n");
        options_usage(pkcs7_options);
}

int
pkcs7_main(int argc, char **argv)
{
	PKCS7 *p7 = NULL;
	BIO *in = NULL, *out = NULL;
	int ret = 1;
	int i;

	memset(&pkcs7_config, 0, sizeof(pkcs7_config));

	pkcs7_config.informat = FORMAT_PEM;
	pkcs7_config.outformat = FORMAT_PEM;

	if (options_parse(argc, argv, pkcs7_options, NULL, NULL) != 0) {
		pkcs7_usage();
		goto end;
	}

#ifndef OPENSSL_NO_ENGINE
	setup_engine(bio_err, pkcs7_config.engine, 0);
#endif

	in = BIO_new(BIO_s_file());
	out = BIO_new(BIO_s_file());
	if ((in == NULL) || (out == NULL)) {
		ERR_print_errors(bio_err);
		goto end;
	}
	if (pkcs7_config.infile == NULL)
		BIO_set_fp(in, stdin, BIO_NOCLOSE);
	else {
		if (BIO_read_filename(in, pkcs7_config.infile) <= 0) {
			perror(pkcs7_config.infile);
			goto end;
		}
	}

	if (pkcs7_config.informat == FORMAT_ASN1)
		p7 = d2i_PKCS7_bio(in, NULL);
	else if (pkcs7_config.informat == FORMAT_PEM)
		p7 = PEM_read_bio_PKCS7(in, NULL, NULL, NULL);
	else {
		BIO_printf(bio_err, "bad input format specified for pkcs7 object\n");
		goto end;
	}
	if (p7 == NULL) {
		BIO_printf(bio_err, "unable to load PKCS7 object\n");
		ERR_print_errors(bio_err);
		goto end;
	}
	if (pkcs7_config.outfile == NULL) {
		BIO_set_fp(out, stdout, BIO_NOCLOSE);
	} else {
		if (BIO_write_filename(out, pkcs7_config.outfile) <= 0) {
			perror(pkcs7_config.outfile);
			goto end;
		}
	}

	if (pkcs7_config.p7_print)
		PKCS7_print_ctx(out, p7, 0, NULL);

	if (pkcs7_config.print_certs) {
		STACK_OF(X509) * certs = NULL;
		STACK_OF(X509_CRL) * crls = NULL;

		i = OBJ_obj2nid(p7->type);
		switch (i) {
		case NID_pkcs7_signed:
			certs = p7->d.sign->cert;
			crls = p7->d.sign->crl;
			break;
		case NID_pkcs7_signedAndEnveloped:
			certs = p7->d.signed_and_enveloped->cert;
			crls = p7->d.signed_and_enveloped->crl;
			break;
		default:
			break;
		}

		if (certs != NULL) {
			X509 *x;

			for (i = 0; i < sk_X509_num(certs); i++) {
				x = sk_X509_value(certs, i);
				if (pkcs7_config.text)
					X509_print(out, x);
				else
					dump_cert_text(out, x);

				if (!pkcs7_config.noout)
					PEM_write_bio_X509(out, x);
				BIO_puts(out, "\n");
			}
		}
		if (crls != NULL) {
			X509_CRL *crl;

			for (i = 0; i < sk_X509_CRL_num(crls); i++) {
				crl = sk_X509_CRL_value(crls, i);

				X509_CRL_print(out, crl);

				if (!pkcs7_config.noout)
					PEM_write_bio_X509_CRL(out, crl);
				BIO_puts(out, "\n");
			}
		}
		ret = 0;
		goto end;
	}
	if (!pkcs7_config.noout) {
		if (pkcs7_config.outformat == FORMAT_ASN1)
			i = i2d_PKCS7_bio(out, p7);
		else if (pkcs7_config.outformat == FORMAT_PEM)
			i = PEM_write_bio_PKCS7(out, p7);
		else {
			BIO_printf(bio_err, "bad output format specified for outfile\n");
			goto end;
		}

		if (!i) {
			BIO_printf(bio_err, "unable to write pkcs7 object\n");
			ERR_print_errors(bio_err);
			goto end;
		}
	}
	ret = 0;
end:
	if (p7 != NULL)
		PKCS7_free(p7);
	if (in != NULL)
		BIO_free(in);
	if (out != NULL)
		BIO_free_all(out);

	return (ret);
}