/* pkcs8.c */
/* Written by Dr Stephen N Henson (shenson@bigfoot.com) 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
 *    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 <stdio.h>
#include <string.h>
#include "apps.h"
#include <openssl/pem.h>
#include <openssl/err.h>
#include <openssl/evp.h>
#include <openssl/pkcs12.h>

#include "apps.h"
#define PROG pkcs8_main


int MAIN(int argc, char **argv)
{
	char **args, *infile = NULL, *outfile = NULL;
	BIO *in = NULL, *out = NULL;
	int topk8 = 0;
	int pbe_nid = -1;
	const EVP_CIPHER *cipher = NULL;
	int iter = PKCS12_DEFAULT_ITER;
	int informat, outformat;
	int p8_broken = PKCS8_OK;
	int nocrypt = 0;
	X509_SIG *p8;
	PKCS8_PRIV_KEY_INFO *p8inf;
	EVP_PKEY *pkey;
	char pass[50], *passin = NULL, *passout = NULL;
	int badarg = 0;
	if (bio_err == NULL) bio_err = BIO_new_fp (stderr, BIO_NOCLOSE);
	informat=FORMAT_PEM;
	outformat=FORMAT_PEM;
	ERR_load_crypto_strings();
	SSLeay_add_all_algorithms();
	args = argv + 1;
	while (!badarg && *args && *args[0] == '-') {
		if (!strcmp(*args,"-v2")) {
			if (args[1]) {
				args++;
				cipher=EVP_get_cipherbyname(*args);
				if(!cipher) {
					BIO_printf(bio_err,
						 "Unknown cipher %s\n", *args);
					badarg = 1;
				}
			} else badarg = 1;
		} else if (!strcmp(*args,"-v1")) {
			if (args[1]) {
				args++;
				pbe_nid=OBJ_txt2nid(*args);
				if(pbe_nid == NID_undef) {
					BIO_printf(bio_err,
						 "Unknown PBE algorithm %s\n", *args);
					badarg = 1;
				}
			} 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, "-topk8")) topk8 = 1;
		else if (!strcmp (*args, "-noiter")) iter = 1;
		else if (!strcmp (*args, "-nocrypt")) nocrypt = 1;
		else if (!strcmp (*args, "-nooct")) p8_broken = PKCS8_NO_OCTET;
		else if (!strcmp(*args,"-passin"))
			{
			if (!args[1]) goto bad;
			passin= *(++args);
			}
		else if (!strcmp(*args,"-envpassin"))
			{
			if (!args[1]) goto bad;
			if(!(passin= getenv(*(++args))))
				{
				BIO_printf(bio_err,
				 "Can't read environment variable %s\n",
								*args);
				badarg = 1;
				}
			}
		else if (strcmp(*args,"-envpassout") == 0)
			{
			if (!args[1]) goto bad;
			if(!(passout= getenv(*(++args))))
				{
				BIO_printf(bio_err,
				 "Can't read environment variable %s\n",
								*args);
				badarg = 1;
				}
			}
		else if (!strcmp(*args,"-passout"))
			{
			if (!args[1]) goto bad;
			passout= *(++args);
			}
		else if (!strcmp (*args, "-in")) {
			if (args[1]) {
				args++;
				infile = *args;
			} else badarg = 1;
		} else if (!strcmp (*args, "-out")) {
			if (args[1]) {
				args++;
				outfile = *args;
			} else badarg = 1;
		} else badarg = 1;
		args++;
	}

	if (badarg) {
		bad:
		BIO_printf(bio_err, "Usage pkcs8 [options]\n");
		BIO_printf(bio_err, "where options are\n");
		BIO_printf(bio_err, "-in file   input file\n");
		BIO_printf(bio_err, "-inform X  input format (DER or PEM)\n");
		BIO_printf(bio_err, "-passin arg     input file pass phrase\n");
		BIO_printf(bio_err, "-envpassin arg  environment variable containing input file pass phrase\n");
		BIO_printf(bio_err, "-outform X output format (DER or PEM)\n");
		BIO_printf(bio_err, "-out file  output file\n");
		BIO_printf(bio_err, "-passout arg    input file pass phrase\n");
		BIO_printf(bio_err, "-envpassout arg environment variable containing input file pass phrase\n");
		BIO_printf(bio_err, "-topk8     output PKCS8 file\n");
		BIO_printf(bio_err, "-nooct     use (broken) no octet form\n");
		BIO_printf(bio_err, "-noiter    use 1 as iteration count\n");
		BIO_printf(bio_err, "-nocrypt   use or expect unencrypted private key\n");
		BIO_printf(bio_err, "-v2 alg    use PKCS#5 v2.0 and cipher \"alg\"\n");
		BIO_printf(bio_err, "-v1 obj    use PKCS#5 v1.5 and cipher \"alg\"\n");
		return (1);
	}

	if ((pbe_nid == -1) && !cipher) pbe_nid = NID_pbeWithMD5AndDES_CBC;

	if (infile) {
		if (!(in = BIO_new_file(infile, "rb"))) {
			BIO_printf(bio_err,
				 "Can't open input file %s\n", infile);
			return (1);
		}
	} else in = BIO_new_fp (stdin, BIO_NOCLOSE);

	if (outfile) {
		if (!(out = BIO_new_file (outfile, "wb"))) {
			BIO_printf(bio_err,
				 "Can't open output file %s\n", outfile);
			return (1);
		}
	} else out = BIO_new_fp (stdout, BIO_NOCLOSE);

	if (topk8) {
		if(informat == FORMAT_PEM)
			pkey = PEM_read_bio_PrivateKey(in, NULL, PEM_cb, passin);
		else if(informat == FORMAT_ASN1)
			pkey = d2i_PrivateKey_bio(in, NULL);
		else {
			BIO_printf(bio_err, "Bad format specified for key\n");
			return (1);
		}
		if (!pkey) {
			BIO_printf(bio_err, "Error reading key\n", outfile);
			ERR_print_errors(bio_err);
			return (1);
		}
		BIO_free(in);
		if (!(p8inf = EVP_PKEY2PKCS8(pkey))) {
			BIO_printf(bio_err, "Error converting key\n", outfile);
			ERR_print_errors(bio_err);
			return (1);
		}
		PKCS8_set_broken(p8inf, p8_broken);
		if(nocrypt) {
			if(outformat == FORMAT_PEM) 
				PEM_write_bio_PKCS8_PRIV_KEY_INFO(out, p8inf);
			else if(outformat == FORMAT_ASN1)
				i2d_PKCS8_PRIV_KEY_INFO_bio(out, p8inf);
			else {
				BIO_printf(bio_err, "Bad format specified for key\n");
				return (1);
			}
		} else {
			if(!passout) {
				passout = pass;
				EVP_read_pw_string(pass, 50, "Enter Encryption Password:", 1);
			}
			if (!(p8 = PKCS8_encrypt(pbe_nid, cipher,
					passout, strlen(passout),
					NULL, 0, iter, p8inf))) {
				BIO_printf(bio_err, "Error encrypting key\n",
								 outfile);
				ERR_print_errors(bio_err);
				return (1);
			}
			if(outformat == FORMAT_PEM) 
				PEM_write_bio_PKCS8(out, p8);
			else if(outformat == FORMAT_ASN1)
				i2d_PKCS8_bio(out, p8);
			else {
				BIO_printf(bio_err, "Bad format specified for key\n");
				return (1);
			}
			X509_SIG_free(p8);
		}
		PKCS8_PRIV_KEY_INFO_free (p8inf);
		EVP_PKEY_free(pkey);
		BIO_free(out);
		return (0);
	}

	if(nocrypt) {
		if(informat == FORMAT_PEM) 
			p8inf = PEM_read_bio_PKCS8_PRIV_KEY_INFO(in,NULL,NULL, NULL);
		else if(informat == FORMAT_ASN1)
			p8inf = d2i_PKCS8_PRIV_KEY_INFO_bio(in, NULL);
		else {
			BIO_printf(bio_err, "Bad format specified for key\n");
			return (1);
		}
	} else {
		if(informat == FORMAT_PEM) 
			p8 = PEM_read_bio_PKCS8(in, NULL, NULL, NULL);
		else if(informat == FORMAT_ASN1)
			p8 = d2i_PKCS8_bio(in, NULL);
		else {
			BIO_printf(bio_err, "Bad format specified for key\n");
			return (1);
		}

		if (!p8) {
			BIO_printf (bio_err, "Error reading key\n", outfile);
			ERR_print_errors(bio_err);
			return (1);
		}
		if(!passin) {
			passin = pass;
			EVP_read_pw_string(pass, 50, "Enter Password:", 0);
		}
		p8inf = M_PKCS8_decrypt(p8, passin, strlen(passin));
		X509_SIG_free(p8);
	}

	if (!p8inf) {
		BIO_printf(bio_err, "Error decrypting key\n", outfile);
		ERR_print_errors(bio_err);
		return (1);
	}

	if (!(pkey = EVP_PKCS82PKEY(p8inf))) {
		BIO_printf(bio_err, "Error converting key\n", outfile);
		ERR_print_errors(bio_err);
		return (1);
	}
	
	if (p8inf->broken) {
		BIO_printf(bio_err, "Warning: broken key encoding: ");
		switch (p8inf->broken) {
			case PKCS8_NO_OCTET:
			BIO_printf(bio_err, "No Octet String\n");
			break;

			default:
			BIO_printf(bio_err, "Unknown broken type\n");
			break;
		}
	}
	
	PKCS8_PRIV_KEY_INFO_free(p8inf);
	if(outformat == FORMAT_PEM) 
		PEM_write_bio_PrivateKey(out, pkey, NULL, NULL, 0, PEM_cb, passout);
	else if(outformat == FORMAT_ASN1)
		i2d_PrivateKey_bio(out, pkey);
	else {
		BIO_printf(bio_err, "Bad format specified for key\n");
			return (1);
	}

	EVP_PKEY_free(pkey);
	BIO_free(out);
	BIO_free(in);

	return (0);
}
