enc.c

一个用于点对点传输加密的工具包源码

/* apps/enc.c */
/* Copyright (C) 1995-1998 Eric Young ([e-mail])
 * All rights reserved.
 *
 * This package is an SSL implementation written
 * by Eric Young ([e-mail]).
 * 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 ([e-mail]).
 * 
 * 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 ([e-mail])"
 *    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 ([e-mail])"
 * 
 * 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 "apps.h"
#include <openssl/bio.h>
#include <openssl/err.h>
#include <openssl/evp.h>
#include <openssl/objects.h>
#include <openssl/x509.h>
#include <openssl/rand.h>
#ifndef NO_MD5
#include <openssl/md5.h>
#endif
#include <openssl/pem.h>

int set_hex(char *in,unsigned char *out,int size);
#undef SIZE
#undef BSIZE
#undef PROG

#define SIZE	(512)
#define BSIZE	(8*1024)
#define	PROG	enc_main

int MAIN(int, char **);

int MAIN(int argc, char **argv)
	{
	static const char magic[]="Salted__";
	char mbuf[8];	/* should be 1 smaller than magic */
	char *strbuf=NULL;
	unsigned char *buff=NULL,*bufsize=NULL;
	int bsize=BSIZE,verbose=0;
	int ret=1,inl;
	unsigned char key[24],iv[MD5_DIGEST_LENGTH];
	unsigned char salt[PKCS5_SALT_LEN];
	char *str=NULL, *passarg = NULL, *pass = NULL;
	char *hkey=NULL,*hiv=NULL,*hsalt = NULL;
	int enc=1,printkey=0,i,base64=0;
	int debug=0,olb64=0,nosalt=0;
	const EVP_CIPHER *cipher=NULL,*c;
	char *inf=NULL,*outf=NULL;
	BIO *in=NULL,*out=NULL,*b64=NULL,*benc=NULL,*rbio=NULL,*wbio=NULL;
#define PROG_NAME_SIZE  16
	char pname[PROG_NAME_SIZE];

	apps_startup();

	if (bio_err == NULL)
		if ((bio_err=BIO_new(BIO_s_file())) != NULL)
			BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);

	/* first check the program name */
	program_name(argv[0],pname,PROG_NAME_SIZE);
	if (strcmp(pname,"base64") == 0)
		base64=1;

	cipher=EVP_get_cipherbyname(pname);
	if (!base64 && (cipher == NULL) && (strcmp(pname,"enc") != 0))
		{
		BIO_printf(bio_err,"%s is an unknown cipher\n",pname);
		goto bad;
		}

	argc--;
	argv++;
	while (argc >= 1)
		{
		if	(strcmp(*argv,"-e") == 0)
			enc=1;
		else if (strcmp(*argv,"-in") == 0)
			{
			if (--argc < 1) goto bad;
			inf= *(++argv);
			}
		else if (strcmp(*argv,"-out") == 0)
			{
			if (--argc < 1) goto bad;
			outf= *(++argv);
			}
		else if (strcmp(*argv,"-pass") == 0)
			{
			if (--argc < 1) goto bad;
			passarg= *(++argv);
			}
		else if	(strcmp(*argv,"-d") == 0)
			enc=0;
		else if	(strcmp(*argv,"-p") == 0)
			printkey=1;
		else if	(strcmp(*argv,"-v") == 0)
			verbose=1;
		else if	(strcmp(*argv,"-salt") == 0)
			nosalt=0;
		else if	(strcmp(*argv,"-nosalt") == 0)
			nosalt=1;
		else if	(strcmp(*argv,"-debug") == 0)
			debug=1;
		else if	(strcmp(*argv,"-P") == 0)
			printkey=2;
		else if	(strcmp(*argv,"-A") == 0)
			olb64=1;
		else if	(strcmp(*argv,"-a") == 0)
			base64=1;
		else if	(strcmp(*argv,"-base64") == 0)
			base64=1;
		else if (strcmp(*argv,"-bufsize") == 0)
			{
			if (--argc < 1) goto bad;
			bufsize=(unsigned char *)*(++argv);
			}
		else if (strcmp(*argv,"-k") == 0)
			{
			if (--argc < 1) goto bad;
			str= *(++argv);
			}
		else if (strcmp(*argv,"-kfile") == 0)
			{
			static char buf[128];
			FILE *infile;
			char *file;

			if (--argc < 1) goto bad;
			file= *(++argv);
			infile=fopen(file,"r");
			if (infile == NULL)
				{
				BIO_printf(bio_err,"unable to read key from '%s'\n",
					file);
				goto bad;
				}
			buf[0]='\0';
			fgets(buf,128,infile);
			fclose(infile);
			i=strlen(buf);
			if ((i > 0) &&
				((buf[i-1] == '\n') || (buf[i-1] == '\r')))
				buf[--i]='\0';
			if ((i > 0) &&
				((buf[i-1] == '\n') || (buf[i-1] == '\r')))
				buf[--i]='\0';
			if (i < 1)
				{
				BIO_printf(bio_err,"zero length password\n");
				goto bad;
				}
			str=buf;
			}
		else if (strcmp(*argv,"-K") == 0)
			{
			if (--argc < 1) goto bad;
			hkey= *(++argv);
			}
		else if (strcmp(*argv,"-S") == 0)
			{
			if (--argc < 1) goto bad;
			hsalt= *(++argv);
			}
		else if (strcmp(*argv,"-iv") == 0)
			{
			if (--argc < 1) goto bad;
			hiv= *(++argv);
			}
		else if	((argv[0][0] == '-') &&
			((c=EVP_get_cipherbyname(&(argv[0][1]))) != NULL))
			{
			cipher=c;
			}
		else if (strcmp(*argv,"-none") == 0)
			cipher=NULL;
		else
			{
			BIO_printf(bio_err,"unknown option '%s'\n",*argv);
bad:
			BIO_printf(bio_err,"options are\n");
			BIO_printf(bio_err,"%-14s input file\n","-in <file>");
			BIO_printf(bio_err,"%-14s output file\n","-out <file>");
			BIO_printf(bio_err,"%-14s pass phrase source\n","-pass <arg>");
			BIO_printf(bio_err,"%-14s encrypt\n","-e");
			BIO_printf(bio_err,"%-14s decrypt\n","-d");
			BIO_printf(bio_err,"%-14s base64 encode/decode, depending on encryption flag\n","-a/-base64");
			BIO_printf(bio_err,"%-14s key is the next argument\n","-k");
			BIO_printf(bio_err,"%-14s key is the first line of the file argument\n","-kfile");
			BIO_printf(bio_err,"%-14s key/iv in hex is the next argument\n","-K/-iv");
			BIO_printf(bio_err,"%-14s print the iv/key (then exit if -P)\n","-[pP]");
			BIO_printf(bio_err,"%-14s buffer size\n","-bufsize <n>");

			BIO_printf(bio_err,"Cipher Types\n");
			BIO_printf(bio_err,"des     : 56 bit key DES encryption\n");
			BIO_printf(bio_err,"des_ede :112 bit key ede DES encryption\n");
			BIO_printf(bio_err,"des_ede3:168 bit key ede DES encryption\n");
#ifndef NO_IDEA
			BIO_printf(bio_err,"idea    :128 bit key IDEA encryption\n");
#endif
#ifndef NO_RC4
			BIO_printf(bio_err,"rc2     :128 bit key RC2 encryption\n");
#endif
#ifndef NO_BF
			BIO_printf(bio_err,"bf      :128 bit key Blowfish encryption\n");
#endif
#ifndef NO_RC4
			BIO_printf(bio_err," -%-5s :128 bit key RC4 encryption\n",
				LN_rc4);
#endif

			BIO_printf(bio_err," -%-12s -%-12s -%-12s -%-12s",
				LN_des_ecb,LN_des_cbc,
				LN_des_cfb64,LN_des_ofb64);
			BIO_printf(bio_err," -%-4s (%s)\n",
				"des", LN_des_cbc);

			BIO_printf(bio_err," -%-12s -%-12s -%-12s -%-12s",
				LN_des_ede,LN_des_ede_cbc,
				LN_des_ede_cfb64,LN_des_ede_ofb64);
			BIO_printf(bio_err," -desx -none\n");


			BIO_printf(bio_err," -%-12s -%-12s -%-12s -%-12s",
				LN_des_ede3,LN_des_ede3_cbc,
				LN_des_ede3_cfb64,LN_des_ede3_ofb64);
			BIO_printf(bio_err," -%-4s (%s)\n",
				"des3", LN_des_ede3_cbc);

#ifndef NO_IDEA
			BIO_printf(bio_err," -%-12s -%-12s -%-12s -%-12s",
				LN_idea_ecb, LN_idea_cbc,
				LN_idea_cfb64, LN_idea_ofb64);
			BIO_printf(bio_err," -%-4s (%s)\n","idea",LN_idea_cbc);
#endif
#ifndef NO_RC2
			BIO_printf(bio_err," -%-12s -%-12s -%-12s -%-12s",
				LN_rc2_ecb, LN_rc2_cbc,
				LN_rc2_cfb64, LN_rc2_ofb64);
			BIO_printf(bio_err," -%-4s (%s)\n","rc2", LN_rc2_cbc);
#endif
#ifndef NO_BF
			BIO_printf(bio_err," -%-12s -%-12s -%-12s -%-12s",
				LN_bf_ecb, LN_bf_cbc,
				LN_bf_cfb64, LN_bf_ofb64);
			BIO_printf(bio_err," -%-4s (%s)\n","bf", LN_bf_cbc);
#endif
#ifndef NO_CAST
			BIO_printf(bio_err," -%-12s -%-12s -%-12s -%-12s",
				LN_cast5_ecb, LN_cast5_cbc,
				LN_cast5_cfb64, LN_cast5_ofb64);
			BIO_printf(bio_err," -%-4s (%s)\n","cast", LN_cast5_cbc);
#endif
#ifndef NO_RC5
			BIO_printf(bio_err," -%-12s -%-12s -%-12s -%-12s",
				LN_rc5_ecb, LN_rc5_cbc,
				LN_rc5_cfb64, LN_rc5_ofb64);
			BIO_printf(bio_err," -%-4s (%s)\n","rc5", LN_rc5_cbc);
#endif
			goto end;
			}
		argc--;
		argv++;
		}

	if (bufsize != NULL)
		{
		unsigned long n;