/* apps/dsa.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 <openssl/opensslconf.h>	/* for OPENSSL_NO_DSA */

 #ifndef OPENSSL_NO_DSA

 #include <stdio.h>

 #include <stdlib.h>

 #include <string.h>

 #include <time.h>

 #include "apps.h"

 #include <openssl/bio.h>

 #include <openssl/err.h>

 #include <openssl/dsa.h>

 #include <openssl/evp.h>

 #include <openssl/x509.h>

 #include <openssl/pem.h>

 #include <openssl/bn.h>

 #undef PROG

 #define PROG	dsa_main

 /* -inform arg	- input format - default PEM (one of DER, NET or PEM)

  * -outform arg - output format - default PEM

  * -in arg	- input file - default stdin

  * -out arg	- output file - default stdout

  * -des		- encrypt output if PEM format with DES in cbc mode

  * -des3	- encrypt output if PEM format

  * -idea	- encrypt output if PEM format

  * -aes128	- encrypt output if PEM format

  * -aes192	- encrypt output if PEM format

  * -aes256	- encrypt output if PEM format

  * -text	- print a text version

  * -modulus	- print the DSA public key

  */

 int MAIN(int, char **);

 int MAIN(int argc, char **argv)

 	{

 #ifndef OPENSSL_NO_ENGINE

 	ENGINE *e = NULL;

 #endif

 	int ret=1;

 	DSA *dsa=NULL;

 	int i,badops=0;

 	const EVP_CIPHER *enc=NULL;

 	BIO *in=NULL,*out=NULL;

 	int informat,outformat,text=0,noout=0;

 	int pubin = 0, pubout = 0;

 	char *infile,*outfile,*prog;

 #ifndef OPENSSL_NO_ENGINE

 	char *engine;

 #endif

 	char *passargin = NULL, *passargout = NULL;

 	char *passin = NULL, *passout = NULL;

 	int modulus=0;

 	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);

 	if (!load_config(bio_err, NULL))

 		goto end;

 #ifndef OPENSSL_NO_ENGINE

 	engine=NULL;

 #endif

 	infile=NULL;

 	outfile=NULL;

 	informat=FORMAT_PEM;

 	outformat=FORMAT_PEM;

 	prog=argv[0];

 	argc--;

 	argv++;

 	while (argc >= 1)

 		{

 		if 	(strcmp(*argv,"-inform") == 0)

 			{

 			if (--argc < 1) goto bad;

 			informat=str2fmt(*(++argv));

 			}

 		else if (strcmp(*argv,"-outform") == 0)

 			{

 			if (--argc < 1) goto bad;

 			outformat=str2fmt(*(++argv));

 			}

 		else if (strcmp(*argv,"-in") == 0)

 			{

 			if (--argc < 1) goto bad;

 			infile= *(++argv);

 			}

 		else if (strcmp(*argv,"-out") == 0)

 			{

 			if (--argc < 1) goto bad;

 			outfile= *(++argv);

 			}

 		else if (strcmp(*argv,"-passin") == 0)

 			{

 			if (--argc < 1) goto bad;

 			passargin= *(++argv);

 			}

 		else if (strcmp(*argv,"-passout") == 0)

 			{

 			if (--argc < 1) goto bad;

 			passargout= *(++argv);

 			}

 #ifndef OPENSSL_NO_ENGINE

 		else if (strcmp(*argv,"-engine") == 0)

 			{

 			if (--argc < 1) goto bad;

 			engine= *(++argv);

 			}

 #endif

 		else if (strcmp(*argv,"-noout") == 0)

 			noout=1;

 		else if (strcmp(*argv,"-text") == 0)

 			text=1;

 		else if (strcmp(*argv,"-modulus") == 0)

 			modulus=1;

 		else if (strcmp(*argv,"-pubin") == 0)

 			pubin=1;

 		else if (strcmp(*argv,"-pubout") == 0)

 			pubout=1;

 		else if ((enc=EVP_get_cipherbyname(&(argv[0][1]))) == NULL)

 			{

 			BIO_printf(bio_err,"unknown option %s\n",*argv);

 			badops=1;

 			break;

 			}

 		argc--;

 		argv++;

 		}

 	if (badops)

 		{

 bad:

 		BIO_printf(bio_err,"%s [options] <infile >outfile\n",prog);

 		BIO_printf(bio_err,"where options are\n");

 		BIO_printf(bio_err," -inform arg     input format - DER or PEM\n");

 		BIO_printf(bio_err," -outform arg    output format - DER or PEM\n");

 		BIO_printf(bio_err," -in arg         input file\n");

 		BIO_printf(bio_err," -passin arg     input file pass phrase source\n");

 		BIO_printf(bio_err," -out arg        output file\n");

 		BIO_printf(bio_err," -passout arg    output file pass phrase source\n");

 #ifndef OPENSSL_NO_ENGINE

 		BIO_printf(bio_err," -engine e       use engine e, possibly a hardware device.\n");

 #endif

 		BIO_printf(bio_err," -des            encrypt PEM output with cbc des\n");

 		BIO_printf(bio_err," -des3           encrypt PEM output with ede cbc des using 168 bit key\n");

 #ifndef OPENSSL_NO_IDEA

 		BIO_printf(bio_err," -idea           encrypt PEM output with cbc idea\n");

 #endif

 #ifndef OPENSSL_NO_AES

 		BIO_printf(bio_err," -aes128, -aes192, -aes256\n");

 		BIO_printf(bio_err,"                 encrypt PEM output with cbc aes\n");

 #endif

 		BIO_printf(bio_err," -text           print the key in text\n");

 		BIO_printf(bio_err," -noout          don't print key out\n");

 		BIO_printf(bio_err," -modulus        print the DSA public value\n");

 		goto end;

 		}

 	ERR_load_crypto_strings();

 #ifndef OPENSSL_NO_ENGINE

         e = setup_engine(bio_err, engine, 0);

 #endif

 	if(!app_passwd(bio_err, passargin, passargout, &passin, &passout)) {

 		BIO_printf(bio_err, "Error getting passwords\n");

 		goto end;

 	}

 	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 (infile == NULL)

 		BIO_set_fp(in,stdin,BIO_NOCLOSE);

 	else

 		{

 		if (BIO_read_filename(in,infile) <= 0)

 			{

 			perror(infile);

 			goto end;

 			}

 		}

 	BIO_printf(bio_err,"read DSA key\n");

 	if	(informat == FORMAT_ASN1) {

 		if(pubin) dsa=d2i_DSA_PUBKEY_bio(in,NULL);

 		else dsa=d2i_DSAPrivateKey_bio(in,NULL);

 	} else if (informat == FORMAT_PEM) {

 		if(pubin) dsa=PEM_read_bio_DSA_PUBKEY(in,NULL, NULL, NULL);

 		else dsa=PEM_read_bio_DSAPrivateKey(in,NULL,NULL,passin);

 	} else

 		{

 		BIO_printf(bio_err,"bad input format specified for key\n");

 		goto end;

 		}

 	if (dsa == NULL)

 		{

 		BIO_printf(bio_err,"unable to load Key\n");

 		ERR_print_errors(bio_err);

 		goto end;

 		}

 	if (outfile == NULL)

 		{

 		BIO_set_fp(out,stdout,BIO_NOCLOSE);

 #ifdef OPENSSL_SYS_VMS

 		{

 		BIO *tmpbio = BIO_new(BIO_f_linebuffer());

 		out = BIO_push(tmpbio, out);

 		}

 #endif

 		}

 	else

 		{

 		if (BIO_write_filename(out,outfile) <= 0)

 			{

 			perror(outfile);

 			goto end;

 			}

 		}

 	if (text) 

 		if (!DSA_print(out,dsa,0))

 			{

 			perror(outfile);

 			ERR_print_errors(bio_err);

 			goto end;

 			}

 	if (modulus)

 		{

 		fprintf(stdout,"Public Key=");

 		BN_print(out,dsa->pub_key);

 		fprintf(stdout,"\n");

 		}

 	if (noout) goto end;

 	BIO_printf(bio_err,"writing DSA key\n");

 	if 	(outformat == FORMAT_ASN1) {

 		if(pubin || pubout) i=i2d_DSA_PUBKEY_bio(out,dsa);

 		else i=i2d_DSAPrivateKey_bio(out,dsa);

 	} else if (outformat == FORMAT_PEM) {

 		if(pubin || pubout)

 			i=PEM_write_bio_DSA_PUBKEY(out,dsa);

 		else i=PEM_write_bio_DSAPrivateKey(out,dsa,enc,

 							NULL,0,NULL, passout);

 	} else {

 		BIO_printf(bio_err,"bad output format specified for outfile\n");

 		goto end;

 		}

 	if (!i)

 		{

 		BIO_printf(bio_err,"unable to write private key\n");

 		ERR_print_errors(bio_err);

 		}

 	else

 		ret=0;

 end:

 	if(in != NULL) BIO_free(in);

 	if(out != NULL) BIO_free_all(out);

 	if(dsa != NULL) DSA_free(dsa);

 	if(passin) OPENSSL_free(passin);

 	if(passout) OPENSSL_free(passout);

 	apps_shutdown();

 	OPENSSL_EXIT(ret);

 	}

 #endif