text: /* $OpenBSD: pkcs8.c,v 1.14 2019/07/14 03:30:46 guenther Exp $ */
  /* 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 "progs.h"
  
  #include <openssl/err.h>
  #include <openssl/evp.h>
  #include <openssl/pem.h>
  #include <openssl/pkcs12.h>
  
  static struct {
  	const EVP_CIPHER *cipher;
  	char *infile;
  	int informat;
  	int iter;
  	int nocrypt;
  	char *outfile;
  	int outformat;
  	char *passargin;
  	char *passargout;
  	int pbe_nid;
  	int topk8;
  } pkcs8_config;
  
  static int
  pkcs8_opt_v1(char *arg)
  {
  	if ((pkcs8_config.pbe_nid = OBJ_txt2nid(arg)) == NID_undef) {
  		fprintf(stderr, "Unknown PBE algorithm '%s'\n", arg);
  		return (1);
  	}
  
  	return (0);
  }
  
  static int
  pkcs8_opt_v2(char *arg)
  {
  	if ((pkcs8_config.cipher = EVP_get_cipherbyname(arg)) == NULL) {
  		fprintf(stderr, "Unknown cipher '%s'\n", arg);
  		return (1);
  	}
  
  	return (0);
  }
  
  static const struct option pkcs8_options[] = {
  	{
  		.name = "in",
  		.argname = "file",
  		.desc = "Input file (default stdin)",
  		.type = OPTION_ARG,
  		.opt.arg = &pkcs8_config.infile,
  	},
  	{
  		.name = "inform",
  		.argname = "der | pem",
  		.desc = "Input format (default PEM)",
  		.type = OPTION_ARG_FORMAT,
  		.opt.value = &pkcs8_config.informat,
  	},
  	{
  		.name = "nocrypt",
  		.desc = "Use or expect unencrypted private key",
  		.type = OPTION_FLAG,
  		.opt.flag = &pkcs8_config.nocrypt,
  	},
  	{
  		.name = "noiter",
  		.desc = "Use 1 as iteration count",
  		.type = OPTION_VALUE,
  		.value = 1,
  		.opt.value = &pkcs8_config.iter,
  	},
  	{
  		.name = "out",
  		.argname = "file",
  		.desc = "Output file (default stdout)",
  		.type = OPTION_ARG,
  		.opt.arg = &pkcs8_config.outfile,
  	},
  	{
  		.name = "outform",
  		.argname = "der | pem",
  		.desc = "Output format (default PEM)",
  		.type = OPTION_ARG_FORMAT,
  		.opt.value = &pkcs8_config.outformat,
  	},
  	{
  		.name = "passin",
  		.argname = "source",
  		.desc = "Input file passphrase source",
  		.type = OPTION_ARG,
  		.opt.arg = &pkcs8_config.passargin,
  	},
  	{
  		.name = "passout",
  		.argname = "source",
  		.desc = "Output file passphrase source",
  		.type = OPTION_ARG,
  		.opt.arg = &pkcs8_config.passargout,
  	},
  	{
  		.name = "topk8",
  		.desc = "Read traditional format key and write PKCS#8 format"
  		    " key",
  		.type = OPTION_FLAG,
  		.opt.flag = &pkcs8_config.topk8,
  	},
  	{
  		.name = "v1",
  		.argname = "algorithm",
  		.desc = "Use PKCS#5 v1.5 or PKCS#12 with given algorithm",
  		.type = OPTION_ARG_FUNC,
  		.opt.argfunc = pkcs8_opt_v1,
  	},
  	{
  		.name = "v2",
  		.argname = "cipher",
  		.desc = "Use PKCS#5 v2.0 with given cipher",
  		.type = OPTION_ARG_FUNC,
  		.opt.argfunc = pkcs8_opt_v2,
  	},
  	{ NULL },
  };
  
  static void
  pkcs8_usage()
  {
  	fprintf(stderr, "usage: pkcs8 [-in file] [inform der | pem] "
  	    "[-nocrypt] [-noiter]\n"
  	    "    [-out file] [-outform der | pem] [-passin arg]\n"
  	    "    [-passout arg] [-topk8] [-v1 alg] [-v2 alg]\n\n");
  	options_usage(pkcs8_options);
  }
  
  int
  pkcs8_main(int argc, char **argv)
  {
  	BIO *in = NULL, *out = NULL;
  	X509_SIG *p8 = NULL;
  	PKCS8_PRIV_KEY_INFO *p8inf = NULL;
  	EVP_PKEY *pkey = NULL;
  	char pass[50], *passin = NULL, *passout = NULL, *p8pass = NULL;
  	int ret = 1;
  
  	if (single_execution) {
  		if (pledge("stdio cpath wpath rpath tty", NULL) == -1) {
  			perror("pledge");
  			exit(1);
  		}
  	}
  
  	memset(&pkcs8_config, 0, sizeof(pkcs8_config));
  
  	pkcs8_config.iter = PKCS12_DEFAULT_ITER;
  	pkcs8_config.informat = FORMAT_PEM;
  	pkcs8_config.outformat = FORMAT_PEM;
  	pkcs8_config.pbe_nid = -1;
  
  	if (options_parse(argc, argv, pkcs8_options, NULL, NULL) != 0) {
  		pkcs8_usage();
  		return (1);
  	}
  
  	if (!app_passwd(bio_err, pkcs8_config.passargin,
  	    pkcs8_config.passargout, &passin, &passout)) {
  		BIO_printf(bio_err, "Error getting passwords\n");
  		goto end;
  	}
  	if ((pkcs8_config.pbe_nid == -1) && !pkcs8_config.cipher)
  		pkcs8_config.pbe_nid = NID_pbeWithMD5AndDES_CBC;
  
  	if (pkcs8_config.infile) {
  		if (!(in = BIO_new_file(pkcs8_config.infile, "rb"))) {
  			BIO_printf(bio_err,
  			    "Can't open input file '%s'\n",
  			    pkcs8_config.infile);
  			goto end;
  		}
  	} else
  		in = BIO_new_fp(stdin, BIO_NOCLOSE);
  
  	if (pkcs8_config.outfile) {
  		if (!(out = BIO_new_file(pkcs8_config.outfile, "wb"))) {
  			BIO_printf(bio_err, "Can't open output file '%s'\n",
  			    pkcs8_config.outfile);
  			goto end;
  		}
  	} else {
  		out = BIO_new_fp(stdout, BIO_NOCLOSE);
  	}
  	if (pkcs8_config.topk8) {
  		pkey = load_key(bio_err, pkcs8_config.infile,
  		    pkcs8_config.informat, 1, passin, "key");
  		if (!pkey)
  			goto end;
  		if (!(p8inf = EVP_PKEY2PKCS8(pkey))) {
  			BIO_printf(bio_err, "Error converting key\n");
  			ERR_print_errors(bio_err);
  			goto end;
  		}
  		if (pkcs8_config.nocrypt) {
  			if (pkcs8_config.outformat == FORMAT_PEM)
  				PEM_write_bio_PKCS8_PRIV_KEY_INFO(out, p8inf);
  			else if (pkcs8_config.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(pkcs8_config.pbe_nid,
  			    pkcs8_config.cipher, p8pass, strlen(p8pass),
  			    NULL, 0, pkcs8_config.iter, p8inf))) {
  				BIO_printf(bio_err, "Error encrypting key\n");
  				ERR_print_errors(bio_err);
  				goto end;
  			}
  			if (pkcs8_config.outformat == FORMAT_PEM)
  				PEM_write_bio_PKCS8(out, p8);
  			else if (pkcs8_config.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 (pkcs8_config.nocrypt) {
  		if (pkcs8_config.informat == FORMAT_PEM)
  			p8inf = PEM_read_bio_PKCS8_PRIV_KEY_INFO(in, NULL,
  			    NULL, NULL);
  		else if (pkcs8_config.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 (pkcs8_config.informat == FORMAT_PEM)
  			p8 = PEM_read_bio_PKCS8(in, NULL, NULL, NULL);
  		else if (pkcs8_config.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 (pkcs8_config.outformat == FORMAT_PEM)
  		PEM_write_bio_PrivateKey(out, pkey, NULL, NULL, 0, NULL,
  		    passout);
  	else if (pkcs8_config.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;
  }
  