/* $OpenBSD$ */
/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
 * project 1999-2004.
 */
/* ====================================================================
 * 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/err.h>
#include <openssl/evp.h>
#include <openssl/pem.h>
#include <openssl/pkcs12.h>

int pkcs8_main(int, char **);

int 
pkcs8_main(int argc, char **argv)
{
	ENGINE *e = NULL;
	char **args, *infile = NULL, *outfile = NULL;
	char *passargin = NULL, *passargout = 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 = NULL;
	PKCS8_PRIV_KEY_INFO *p8inf = NULL;
	EVP_PKEY *pkey = NULL;
	char pass[50], *passin = NULL, *passout = NULL, *p8pass = NULL;
	int badarg = 0;
	int ret = 1;
#ifndef OPENSSL_NO_ENGINE
	char *engine = NULL;
#endif

	if (!load_config(bio_err, NULL))
		goto end;

	informat = FORMAT_PEM;
	outformat = FORMAT_PEM;

	ERR_load_crypto_strings();
	OpenSSL_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, "-nsdb"))
			p8_broken = PKCS8_NS_DB;
		else if (!strcmp(*args, "-embed"))
			p8_broken = PKCS8_EMBEDDED_PARAM;
		else if (!strcmp(*args, "-passin")) {
			if (!args[1])
				goto bad;
			passargin = *(++args);
		} else if (!strcmp(*args, "-passout")) {
			if (!args[1])
				goto bad;
			passargout = *(++args);
		}
#ifndef OPENSSL_NO_ENGINE
		else if (strcmp(*args, "-engine") == 0) {
			if (!args[1])
				goto bad;
			engine = *(++args);
		}
#endif
		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 source\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    output file pass phrase source\n");
		BIO_printf(bio_err, "-topk8          output PKCS8 file\n");
		BIO_printf(bio_err, "-nooct          use (nonstandard) no octet format\n");
		BIO_printf(bio_err, "-embed          use (nonstandard) embedded DSA parameters format\n");
		BIO_printf(bio_err, "-nsdb           use (nonstandard) DSA Netscape DB format\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");
#ifndef OPENSSL_NO_ENGINE
		BIO_printf(bio_err, " -engine e       use engine e, possibly a hardware device.\n");
#endif
		goto end;
	}
#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;
	}
	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);
			goto end;
		}
	} 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);
			goto end;
		}
	} else {
		out = BIO_new_fp(stdout, BIO_NOCLOSE);
	}
	if (topk8) {
		pkey = load_key(bio_err, infile, informat, 1,
		    passin, e, "key");
		if (!pkey)
			goto end;
		if (!(p8inf = EVP_PKEY2PKCS8_broken(pkey, p8_broken))) {
			BIO_printf(bio_err, "Error converting key\n");
			ERR_print_errors(bio_err);
			goto end;
		}
		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");
				goto end;
			}
		} else {
			if (passout)
				p8pass = passout;
			else {
				p8pass = pass;
				if (EVP_read_pw_string(pass, sizeof pass, "Enter Encryption Password:", 1))
					goto end;
			}
			if (!(p8 = PKCS8_encrypt(pbe_nid, cipher,
				    p8pass, strlen(p8pass),
				    NULL, 0, iter, p8inf))) {
				BIO_printf(bio_err, "Error encrypting key\n");
				ERR_print_errors(bio_err);
				goto end;
			}
			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");
				goto end;
			}
		}

		ret = 0;
		goto end;
	}
	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");
			goto end;
		}
	} 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");
			goto end;
		}

		if (!p8) {
			BIO_printf(bio_err, "Error reading key\n");
			ERR_print_errors(bio_err);
			goto end;
		}
		if (passin)
			p8pass = passin;
		else {
			p8pass = pass;
			EVP_read_pw_string(pass, sizeof pass, "Enter Password:", 0);
		}
		p8inf = PKCS8_decrypt(p8, p8pass, strlen(p8pass));
	}

	if (!p8inf) {
		BIO_printf(bio_err, "Error decrypting key\n");
		ERR_print_errors(bio_err);
		goto end;
	}
	if (!(pkey = EVP_PKCS82PKEY(p8inf))) {
		BIO_printf(bio_err, "Error converting key\n");
		ERR_print_errors(bio_err);
		goto end;
	}
	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 in PrivateKey\n");
			break;

		case PKCS8_EMBEDDED_PARAM:
			BIO_printf(bio_err, "DSA parameters included in PrivateKey\n");
			break;

		case PKCS8_NS_DB:
			BIO_printf(bio_err, "DSA public key include in PrivateKey\n");
			break;

		case PKCS8_NEG_PRIVKEY:
			BIO_printf(bio_err, "DSA private key value is negative\n");
			break;

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

end:
	X509_SIG_free(p8);
	PKCS8_PRIV_KEY_INFO_free(p8inf);
	EVP_PKEY_free(pkey);
	BIO_free_all(out);
	BIO_free(in);
	free(passin);
	free(passout);

	return ret;
}