smime.c

来自「一个用于点对点传输加密的工具包源码」· C语言 代码 · 共 549 行 · 第 1/2 页

/* smime.c */
/* Written by Dr Stephen N Henson ([e-mail]) for the OpenSSL
 * project 1999.
 */
/* ====================================================================
 * Copyright (c) 1999 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
 *    [e-mail].
 *
 * 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
 * ([e-mail]).  This product includes software written by Tim
 * Hudson ([e-mail]).
 *
 */

/* S/MIME utility function */

#include <stdio.h>
#include <string.h>
#include "apps.h"
#include <openssl/crypto.h>
#include <openssl/pem.h>
#include <openssl/err.h>

#undef PROG
#define PROG smime_main
static X509_STORE *setup_verify(char *CAfile, char *CApath);
static int save_certs(char *signerfile, STACK_OF(X509) *signers);

#define SMIME_OP	0x10
#define SMIME_ENCRYPT	(1 | SMIME_OP)
#define SMIME_DECRYPT	2
#define SMIME_SIGN	(3 | SMIME_OP)
#define SMIME_VERIFY	4
#define SMIME_PK7OUT	5

int MAIN(int, char **);

int MAIN(int argc, char **argv)
{
	int operation = 0;
	int ret = 0;
	char **args;
	char *inmode = "r", *outmode = "w";
	char *infile = NULL, *outfile = NULL;
	char *signerfile = NULL, *recipfile = NULL;
	char *certfile = NULL, *keyfile = NULL, *contfile=NULL;
	EVP_CIPHER *cipher = NULL;
	PKCS7 *p7 = NULL;
	X509_STORE *store = NULL;
	X509 *cert = NULL, *recip = NULL, *signer = NULL;
	EVP_PKEY *key = NULL;
	STACK_OF(X509) *encerts = NULL, *other = NULL;
	BIO *in = NULL, *out = NULL, *indata = NULL;
	int badarg = 0;
	int flags = PKCS7_DETACHED;
	char *to = NULL, *from = NULL, *subject = NULL;
	char *CAfile = NULL, *CApath = NULL;
	char *passargin = NULL, *passin = NULL;
	char *inrand = NULL;
	int need_rand = 0;
	int informat = FORMAT_SMIME, outformat = FORMAT_SMIME;
	args = argv + 1;

	ret = 1;

	while (!badarg && *args && *args[0] == '-') {
		if (!strcmp (*args, "-encrypt")) operation = SMIME_ENCRYPT;
		else if (!strcmp (*args, "-decrypt")) operation = SMIME_DECRYPT;
		else if (!strcmp (*args, "-sign")) operation = SMIME_SIGN;
		else if (!strcmp (*args, "-verify")) operation = SMIME_VERIFY;
		else if (!strcmp (*args, "-pk7out")) operation = SMIME_PK7OUT;
#ifndef NO_DES
		else if (!strcmp (*args, "-des3")) 
				cipher = EVP_des_ede3_cbc();
		else if (!strcmp (*args, "-des")) 
				cipher = EVP_des_cbc();
#endif
#ifndef NO_RC2
		else if (!strcmp (*args, "-rc2-40")) 
				cipher = EVP_rc2_40_cbc();
		else if (!strcmp (*args, "-rc2-128")) 
				cipher = EVP_rc2_cbc();
		else if (!strcmp (*args, "-rc2-64")) 
				cipher = EVP_rc2_64_cbc();
#endif
		else if (!strcmp (*args, "-text")) 
				flags |= PKCS7_TEXT;
		else if (!strcmp (*args, "-nointern")) 
				flags |= PKCS7_NOINTERN;
		else if (!strcmp (*args, "-noverify")) 
				flags |= PKCS7_NOVERIFY;
		else if (!strcmp (*args, "-nochain")) 
				flags |= PKCS7_NOCHAIN;
		else if (!strcmp (*args, "-nocerts")) 
				flags |= PKCS7_NOCERTS;
		else if (!strcmp (*args, "-noattr")) 
				flags |= PKCS7_NOATTR;
		else if (!strcmp (*args, "-nodetach")) 
				flags &= ~PKCS7_DETACHED;
		else if (!strcmp (*args, "-nosmimecap"))
				flags |= PKCS7_NOSMIMECAP;
		else if (!strcmp (*args, "-binary"))
				flags |= PKCS7_BINARY;
		else if (!strcmp (*args, "-nosigs"))
				flags |= PKCS7_NOSIGS;
		else if (!strcmp(*args,"-rand")) {
			if (args[1]) {
				args++;
				inrand = *args;
			} else badarg = 1;
			need_rand = 1;
		} else if (!strcmp(*args,"-passin")) {
			if (args[1]) {
				args++;
				passargin = *args;
			} else badarg = 1;
		} else if (!strcmp (*args, "-to")) {
			if (args[1]) {
				args++;
				to = *args;
			} else badarg = 1;
		} else if (!strcmp (*args, "-from")) {
			if (args[1]) {
				args++;
				from = *args;
			} else badarg = 1;
		} else if (!strcmp (*args, "-subject")) {
			if (args[1]) {
				args++;
				subject = *args;
			} else badarg = 1;
		} else if (!strcmp (*args, "-signer")) {
			if (args[1]) {
				args++;
				signerfile = *args;
			} else badarg = 1;
		} else if (!strcmp (*args, "-recip")) {
			if (args[1]) {
				args++;
				recipfile = *args;
			} else badarg = 1;
		} else if (!strcmp (*args, "-inkey")) {
			if (args[1]) {
				args++;
				keyfile = *args;
			} else badarg = 1;
		} else if (!strcmp (*args, "-certfile")) {
			if (args[1]) {
				args++;
				certfile = *args;
			} else badarg = 1;
		} else if (!strcmp (*args, "-CAfile")) {
			if (args[1]) {
				args++;
				CAfile = *args;
			} else badarg = 1;
		} else if (!strcmp (*args, "-CApath")) {
			if (args[1]) {
				args++;
				CApath = *args;
			} else badarg = 1;
		} else if (!strcmp (*args, "-in")) {
			if (args[1]) {
				args++;
				infile = *args;
			} else badarg = 1;
		} else if (!strcmp (*args, "-inform")) {
			if (args[1]) {
				args++;
				informat = str2fmt(*args);
			} else badarg = 1;
		} else if (!strcmp (*args, "-outform")) {
			if (args[1]) {
				args++;
				outformat = str2fmt(*args);
			} else badarg = 1;
		} else if (!strcmp (*args, "-out")) {
			if (args[1]) {
				args++;
				outfile = *args;
			} else badarg = 1;
		} else if (!strcmp (*args, "-content")) {
			if (args[1]) {
				args++;
				contfile = *args;
			} else badarg = 1;
		} else badarg = 1;
		args++;
	}

	if(operation == SMIME_SIGN) {
		if(!signerfile) {
			BIO_printf(bio_err, "No signer certificate specified\n");
			badarg = 1;
		}
		need_rand = 1;
	} else if(operation == SMIME_DECRYPT) {
		if(!recipfile) {
			BIO_printf(bio_err, "No recipient certificate and key specified\n");
			badarg = 1;
		}
	} else if(operation == SMIME_ENCRYPT) {
		if(!*args) {
			BIO_printf(bio_err, "No recipient(s) certificate(s) specified\n");
			badarg = 1;
		}
		need_rand = 1;
	} else if(!operation) badarg = 1;

	if (badarg) {
		BIO_printf (bio_err, "Usage smime [options] cert.pem ...\n");
		BIO_printf (bio_err, "where options are\n");
		BIO_printf (bio_err, "-encrypt       encrypt message\n");
		BIO_printf (bio_err, "-decrypt       decrypt encrypted message\n");
		BIO_printf (bio_err, "-sign          sign message\n");
		BIO_printf (bio_err, "-verify        verify signed message\n");
		BIO_printf (bio_err, "-pk7out        output PKCS#7 structure\n");
#ifndef NO_DES
		BIO_printf (bio_err, "-des3          encrypt with triple DES\n");
		BIO_printf (bio_err, "-des           encrypt with DES\n");
#endif
#ifndef NO_RC2
		BIO_printf (bio_err, "-rc2-40        encrypt with RC2-40 (default)\n");
		BIO_printf (bio_err, "-rc2-64        encrypt with RC2-64\n");
		BIO_printf (bio_err, "-rc2-128       encrypt with RC2-128\n");
#endif
		BIO_printf (bio_err, "-nointern      don't search certificates in message for signer\n");
		BIO_printf (bio_err, "-nosigs        don't verify message signature\n");
		BIO_printf (bio_err, "-noverify      don't verify signers certificate\n");
		BIO_printf (bio_err, "-nocerts       don't include signers certificate when signing\n");
		BIO_printf (bio_err, "-nodetach      use opaque signing\n");