/* rsautl.c */

 /* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL

  * project 2000.

  */

 /* ====================================================================

  * Copyright (c) 2000 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

  *    licensing@OpenSSL.org.

  *

  * 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

  * (eay@cryptsoft.com).  This product includes software written by Tim

  * Hudson (tjh@cryptsoft.com).

  *

  */

 #include <openssl/opensslconf.h>

 #ifndef OPENSSL_NO_RSA

 #include "apps.h"

 #include <string.h>

 #include <openssl/err.h>

 #include <openssl/pem.h>

 #include <openssl/rsa.h>

 #define RSA_SIGN 	1

 #define RSA_VERIFY 	2

 #define RSA_ENCRYPT 	3

 #define RSA_DECRYPT 	4

 #define KEY_PRIVKEY	1

 #define KEY_PUBKEY	2

 #define KEY_CERT	3

 static void usage(void);

 #undef PROG

 #define PROG rsautl_main

 int MAIN(int argc, char **);

 int MAIN(int argc, char **argv)

 {

 	ENGINE *e = NULL;

 	BIO *in = NULL, *out = NULL;

 	char *infile = NULL, *outfile = NULL;

 #ifndef OPENSSL_NO_ENGINE

 	char *engine = NULL;

 #endif

 	char *keyfile = NULL;

 	char rsa_mode = RSA_VERIFY, key_type = KEY_PRIVKEY;

 	int keyform = FORMAT_PEM;

 	char need_priv = 0, badarg = 0, rev = 0;

 	char hexdump = 0, asn1parse = 0;

 	X509 *x;

 	EVP_PKEY *pkey = NULL;

 	RSA *rsa = NULL;

 	unsigned char *rsa_in = NULL, *rsa_out = NULL, pad;

 	char *passargin = NULL, *passin = NULL;

 	int rsa_inlen, rsa_outlen = 0;

 	int keysize;

 	int ret = 1;

 	argc--;

 	argv++;

 	if(!bio_err) bio_err = BIO_new_fp(stderr, BIO_NOCLOSE);

 	if (!load_config(bio_err, NULL))

 		goto end;

 	ERR_load_crypto_strings();

 	OpenSSL_add_all_algorithms();

 	pad = RSA_PKCS1_PADDING;

 	while(argc >= 1)

 	{

 		if (!strcmp(*argv,"-in")) {

 			if (--argc < 1) badarg = 1;

                         infile= *(++argv);

 		} else if (!strcmp(*argv,"-out")) {

 			if (--argc < 1) badarg = 1;

 			outfile= *(++argv);

 		} else if(!strcmp(*argv, "-inkey")) {

 			if (--argc < 1) badarg = 1;

 			keyfile = *(++argv);

 		} else if (!strcmp(*argv,"-passin")) {

 			if (--argc < 1) badarg = 1;

 			passargin= *(++argv);

 		} else if (strcmp(*argv,"-keyform") == 0) {

 			if (--argc < 1) badarg = 1;

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

 #ifndef OPENSSL_NO_ENGINE

 		} else if(!strcmp(*argv, "-engine")) {

 			if (--argc < 1) badarg = 1;

 			engine = *(++argv);

 #endif

 		} else if(!strcmp(*argv, "-pubin")) {

 			key_type = KEY_PUBKEY;

 		} else if(!strcmp(*argv, "-certin")) {

 			key_type = KEY_CERT;

 		} 

 		else if(!strcmp(*argv, "-asn1parse")) asn1parse = 1;

 		else if(!strcmp(*argv, "-hexdump")) hexdump = 1;

 		else if(!strcmp(*argv, "-raw")) pad = RSA_NO_PADDING;

 		else if(!strcmp(*argv, "-oaep")) pad = RSA_PKCS1_OAEP_PADDING;

 		else if(!strcmp(*argv, "-ssl")) pad = RSA_SSLV23_PADDING;

 		else if(!strcmp(*argv, "-pkcs")) pad = RSA_PKCS1_PADDING;

 		else if(!strcmp(*argv, "-x931")) pad = RSA_X931_PADDING;

 		else if(!strcmp(*argv, "-sign")) {

 			rsa_mode = RSA_SIGN;

 			need_priv = 1;

 		} else if(!strcmp(*argv, "-verify")) rsa_mode = RSA_VERIFY;

 		else if(!strcmp(*argv, "-rev")) rev = 1;

 		else if(!strcmp(*argv, "-encrypt")) rsa_mode = RSA_ENCRYPT;

 		else if(!strcmp(*argv, "-decrypt")) {

 			rsa_mode = RSA_DECRYPT;

 			need_priv = 1;

 		} else badarg = 1;

 		if(badarg) {

 			usage();

 			goto end;

 		}

 		argc--;

 		argv++;

 	}

 	if(need_priv && (key_type != KEY_PRIVKEY)) {

 		BIO_printf(bio_err, "A private key is needed for this operation\n");

 		goto end;

 	}

 #ifndef OPENSSL_NO_ENGINE

         e = setup_engine(bio_err, engine, 0);

 #endif

 	if(!app_passwd(bio_err, passargin, NULL, &passin, NULL)) {

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

 		goto end;

 	}

 /* FIXME: seed PRNG only if needed */

 	app_RAND_load_file(NULL, bio_err, 0);

 	switch(key_type) {

 		case KEY_PRIVKEY:

 		pkey = load_key(bio_err, keyfile, keyform, 0,

 			passin, e, "Private Key");

 		break;

 		case KEY_PUBKEY:

 		pkey = load_pubkey(bio_err, keyfile, keyform, 0,

 			NULL, e, "Public Key");

 		break;

 		case KEY_CERT:

 		x = load_cert(bio_err, keyfile, keyform,

 			NULL, e, "Certificate");

 		if(x) {

 			pkey = X509_get_pubkey(x);

 			X509_free(x);

 		}

 		break;

 	}

 	if(!pkey) {

 		return 1;

 	}

 	rsa = EVP_PKEY_get1_RSA(pkey);

 	EVP_PKEY_free(pkey);

 	if(!rsa) {

 		BIO_printf(bio_err, "Error getting RSA key\n");

 		ERR_print_errors(bio_err);

 		goto end;

 	}

 	if(infile) {

 		if(!(in = BIO_new_file(infile, "rb"))) {

 			BIO_printf(bio_err, "Error Reading Input File\n");

 			ERR_print_errors(bio_err);	

 			goto end;

 		}

 	} 

 	else 

 	in = BIO_new_fp(stdin, BIO_NOCLOSE);

 	if(outfile) {

 		if(!(out = BIO_new_file(outfile, "wb"))) {

 			BIO_printf(bio_err, "Error Reading Output File\n");

 			ERR_print_errors(bio_err);	

 			goto end;

 		}

 	} else {

 		out = BIO_new_fp(stdout, BIO_NOCLOSE);

 #ifdef OPENSSL_SYS_VMS

 		{

 		    BIO *tmpbio = BIO_new(BIO_f_linebuffer());

 		    out = BIO_push(tmpbio, out);

 		}

 #endif

 	}

 	keysize = RSA_size(rsa);

 	rsa_in = OPENSSL_malloc(keysize * 2);

 	rsa_out = OPENSSL_malloc(keysize);

 	/* Read the input data */

 	rsa_inlen = BIO_read(in, rsa_in, keysize * 2);

 	if(rsa_inlen <= 0) {

 		BIO_printf(bio_err, "Error reading input Data\n");

 		exit(1);

 	}

 	if(rev) {

 		int i;

 		unsigned char ctmp;

 		for(i = 0; i < rsa_inlen/2; i++) {

 			ctmp = rsa_in[i];

 			rsa_in[i] = rsa_in[rsa_inlen - 1 - i];

 			rsa_in[rsa_inlen - 1 - i] = ctmp;

 		}

 	}

 	switch(rsa_mode) {

 		case RSA_VERIFY:

 			rsa_outlen  = RSA_public_decrypt(rsa_inlen, rsa_in, rsa_out, rsa, pad);

 		break;

 		case RSA_SIGN:

 			rsa_outlen  = RSA_private_encrypt(rsa_inlen, rsa_in, rsa_out, rsa, pad);

 		break;

 		case RSA_ENCRYPT:

 			rsa_outlen  = RSA_public_encrypt(rsa_inlen, rsa_in, rsa_out, rsa, pad);

 		break;

 		case RSA_DECRYPT:

 			rsa_outlen  = RSA_private_decrypt(rsa_inlen, rsa_in, rsa_out, rsa, pad);

 		break;

 	}

 	if(rsa_outlen <= 0) {

 		BIO_printf(bio_err, "RSA operation error\n");

 		ERR_print_errors(bio_err);

 		goto end;

 	}

 	ret = 0;

 	if(asn1parse) {

 		if(!ASN1_parse_dump(out, rsa_out, rsa_outlen, 1, -1)) {

 			ERR_print_errors(bio_err);

 		}

 	} else if(hexdump) BIO_dump(out, (char *)rsa_out, rsa_outlen);

 	else BIO_write(out, rsa_out, rsa_outlen);

 	end:

 	RSA_free(rsa);

 	BIO_free(in);

 	BIO_free_all(out);

 	if(rsa_in) OPENSSL_free(rsa_in);

 	if(rsa_out) OPENSSL_free(rsa_out);

 	if(passin) OPENSSL_free(passin);

 	return ret;

 }

 static void usage()

 {

 	BIO_printf(bio_err, "Usage: rsautl [options]\n");

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

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

 	BIO_printf(bio_err, "-inkey file     input key\n");

 	BIO_printf(bio_err, "-keyform arg    private key format - default PEM\n");

 	BIO_printf(bio_err, "-pubin          input is an RSA public\n");

 	BIO_printf(bio_err, "-certin         input is a certificate carrying an RSA public key\n");

 	BIO_printf(bio_err, "-ssl            use SSL v2 padding\n");

 	BIO_printf(bio_err, "-raw            use no padding\n");

 	BIO_printf(bio_err, "-pkcs           use PKCS#1 v1.5 padding (default)\n");

 	BIO_printf(bio_err, "-oaep           use PKCS#1 OAEP\n");

 	BIO_printf(bio_err, "-sign           sign with private key\n");

 	BIO_printf(bio_err, "-verify         verify with public key\n");

 	BIO_printf(bio_err, "-encrypt        encrypt with public key\n");

 	BIO_printf(bio_err, "-decrypt        decrypt with private key\n");

 	BIO_printf(bio_err, "-hexdump        hex dump output\n");

 #ifndef OPENSSL_NO_ENGINE

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

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

 #endif

 }

 #endif