Return to genpkey.c CVS log

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Remove all duplicate prototypes for *_main functions (these are already
provided by progs.h). Also, move the FUNCTION type (and flags) into
openssl.c since that is the only place of use. Lastly, remove pointless
'extern' from the prototypes and use char **argv instead of char *argv[]
(the former is used elsewhere).

ok deraadt@ doug@

/* $OpenBSD: genpkey.c,v 1.4 2015/08/22 16:36:05 jsing Exp $ */
/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
 * project 2006
 */
/* ====================================================================
 * Copyright (c) 2006 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>

#ifndef OPENSSL_NO_ENGINE
#include <openssl/engine.h>
#endif

static int
init_keygen_file(BIO * err, EVP_PKEY_CTX ** pctx, const char *file,
    ENGINE * e);
static int genpkey_cb(EVP_PKEY_CTX * ctx);

int
genpkey_main(int argc, char **argv)
{
	ENGINE *e = NULL;
	char **args, *outfile = NULL;
	char *passarg = NULL;
	BIO *in = NULL, *out = NULL;
	const EVP_CIPHER *cipher = NULL;
	int outformat;
	int text = 0;
	EVP_PKEY *pkey = NULL;
	EVP_PKEY_CTX *ctx = NULL;
	char *pass = NULL;
	int badarg = 0;
	int ret = 1, rv;

	int do_param = 0;

	outformat = FORMAT_PEM;

	args = argv + 1;
	while (!badarg && *args && *args[0] == '-') {
		if (!strcmp(*args, "-outform")) {
			if (args[1]) {
				args++;
				outformat = str2fmt(*args);
			} else
				badarg = 1;
		} else if (!strcmp(*args, "-pass")) {
			if (!args[1])
				goto bad;
			passarg = *(++args);
		}
#ifndef OPENSSL_NO_ENGINE
		else if (strcmp(*args, "-engine") == 0) {
			if (!args[1])
				goto bad;
			e = setup_engine(bio_err, *(++args), 0);
		}
#endif
		else if (!strcmp(*args, "-paramfile")) {
			if (!args[1])
				goto bad;
			args++;
			if (do_param == 1)
				goto bad;
			if (!init_keygen_file(bio_err, &ctx, *args, e))
				goto end;
		} else if (!strcmp(*args, "-out")) {
			if (args[1]) {
				args++;
				outfile = *args;
			} else
				badarg = 1;
		} else if (strcmp(*args, "-algorithm") == 0) {
			if (!args[1])
				goto bad;
			if (!init_gen_str(bio_err, &ctx, *(++args), e, do_param))
				goto end;
		} else if (strcmp(*args, "-pkeyopt") == 0) {
			if (!args[1])
				goto bad;
			if (!ctx) {
				BIO_puts(bio_err, "No keytype specified\n");
				goto bad;
			} else if (pkey_ctrl_string(ctx, *(++args)) <= 0) {
				BIO_puts(bio_err, "parameter setting error\n");
				ERR_print_errors(bio_err);
				goto end;
			}
		} else if (strcmp(*args, "-genparam") == 0) {
			if (ctx)
				goto bad;
			do_param = 1;
		} else if (strcmp(*args, "-text") == 0)
			text = 1;
		else {
			cipher = EVP_get_cipherbyname(*args + 1);
			if (!cipher) {
				BIO_printf(bio_err, "Unknown cipher %s\n",
				    *args + 1);
				badarg = 1;
			}
			if (do_param == 1)
				badarg = 1;
		}
		args++;
	}

	if (!ctx)
		badarg = 1;

	if (badarg) {
bad:
		BIO_printf(bio_err, "Usage: genpkey [options]\n");
		BIO_printf(bio_err, "where options may be\n");
		BIO_printf(bio_err, "-out file          output file\n");
		BIO_printf(bio_err, "-outform X         output format (DER or PEM)\n");
		BIO_printf(bio_err, "-pass arg          output file pass phrase source\n");
		BIO_printf(bio_err, "-<cipher>          use cipher <cipher> to encrypt the key\n");
#ifndef OPENSSL_NO_ENGINE
		BIO_printf(bio_err, "-engine e          use engine e, possibly a hardware device.\n");
#endif
		BIO_printf(bio_err, "-paramfile file    parameters file\n");
		BIO_printf(bio_err, "-algorithm alg     the public key algorithm\n");
		BIO_printf(bio_err, "-pkeyopt opt:value set the public key algorithm option <opt>\n"
		    "                   to value <value>\n");
		BIO_printf(bio_err, "-genparam          generate parameters, not key\n");
		BIO_printf(bio_err, "-text              print the in text\n");
		BIO_printf(bio_err, "NB: options order may be important!  See the manual page.\n");
		goto end;
	}
	if (!app_passwd(bio_err, passarg, NULL, &pass, NULL)) {
		BIO_puts(bio_err, "Error getting password\n");
		goto end;
	}
	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);
	}

	EVP_PKEY_CTX_set_cb(ctx, genpkey_cb);
	EVP_PKEY_CTX_set_app_data(ctx, bio_err);

	if (do_param) {
		if (EVP_PKEY_paramgen(ctx, &pkey) <= 0) {
			BIO_puts(bio_err, "Error generating parameters\n");
			ERR_print_errors(bio_err);
			goto end;
		}
	} else {
		if (EVP_PKEY_keygen(ctx, &pkey) <= 0) {
			BIO_puts(bio_err, "Error generating key\n");
			ERR_print_errors(bio_err);
			goto end;
		}
	}

	if (do_param)
		rv = PEM_write_bio_Parameters(out, pkey);
	else if (outformat == FORMAT_PEM)
		rv = PEM_write_bio_PrivateKey(out, pkey, cipher, NULL, 0,
		    NULL, pass);
	else if (outformat == FORMAT_ASN1)
		rv = i2d_PrivateKey_bio(out, pkey);
	else {
		BIO_printf(bio_err, "Bad format specified for key\n");
		goto end;
	}

	if (rv <= 0) {
		BIO_puts(bio_err, "Error writing key\n");
		ERR_print_errors(bio_err);
	}
	if (text) {
		if (do_param)
			rv = EVP_PKEY_print_params(out, pkey, 0, NULL);
		else
			rv = EVP_PKEY_print_private(out, pkey, 0, NULL);

		if (rv <= 0) {
			BIO_puts(bio_err, "Error printing key\n");
			ERR_print_errors(bio_err);
		}
	}
	ret = 0;

end:
	if (pkey)
		EVP_PKEY_free(pkey);
	if (ctx)
		EVP_PKEY_CTX_free(ctx);
	if (out)
		BIO_free_all(out);
	BIO_free(in);
	free(pass);

	return ret;
}

static int
init_keygen_file(BIO * err, EVP_PKEY_CTX ** pctx,
    const char *file, ENGINE * e)
{
	BIO *pbio;
	EVP_PKEY *pkey = NULL;
	EVP_PKEY_CTX *ctx = NULL;
	if (*pctx) {
		BIO_puts(err, "Parameters already set!\n");
		return 0;
	}
	pbio = BIO_new_file(file, "r");
	if (!pbio) {
		BIO_printf(err, "Can't open parameter file %s\n", file);
		return 0;
	}
	pkey = PEM_read_bio_Parameters(pbio, NULL);
	BIO_free(pbio);

	if (!pkey) {
		BIO_printf(bio_err, "Error reading parameter file %s\n", file);
		return 0;
	}
	ctx = EVP_PKEY_CTX_new(pkey, e);
	if (!ctx)
		goto err;
	if (EVP_PKEY_keygen_init(ctx) <= 0)
		goto err;
	EVP_PKEY_free(pkey);
	*pctx = ctx;
	return 1;

err:
	BIO_puts(err, "Error initializing context\n");
	ERR_print_errors(err);
	if (ctx)
		EVP_PKEY_CTX_free(ctx);
	if (pkey)
		EVP_PKEY_free(pkey);
	return 0;

}

int
init_gen_str(BIO * err, EVP_PKEY_CTX ** pctx,
    const char *algname, ENGINE * e, int do_param)
{
	EVP_PKEY_CTX *ctx = NULL;
	const EVP_PKEY_ASN1_METHOD *ameth;
	ENGINE *tmpeng = NULL;
	int pkey_id;

	if (*pctx) {
		BIO_puts(err, "Algorithm already set!\n");
		return 0;
	}
	ameth = EVP_PKEY_asn1_find_str(&tmpeng, algname, -1);

#ifndef OPENSSL_NO_ENGINE
	if (!ameth && e)
		ameth = ENGINE_get_pkey_asn1_meth_str(e, algname, -1);
#endif

	if (!ameth) {
		BIO_printf(bio_err, "Algorithm %s not found\n", algname);
		return 0;
	}
	ERR_clear_error();

	EVP_PKEY_asn1_get0_info(&pkey_id, NULL, NULL, NULL, NULL, ameth);
#ifndef OPENSSL_NO_ENGINE
	if (tmpeng)
		ENGINE_finish(tmpeng);
#endif
	ctx = EVP_PKEY_CTX_new_id(pkey_id, e);

	if (!ctx)
		goto err;
	if (do_param) {
		if (EVP_PKEY_paramgen_init(ctx) <= 0)
			goto err;
	} else {
		if (EVP_PKEY_keygen_init(ctx) <= 0)
			goto err;
	}

	*pctx = ctx;
	return 1;

err:
	BIO_printf(err, "Error initializing %s context\n", algname);
	ERR_print_errors(err);
	if (ctx)
		EVP_PKEY_CTX_free(ctx);
	return 0;

}

static int
genpkey_cb(EVP_PKEY_CTX * ctx)
{
	char c = '*';
	BIO *b = EVP_PKEY_CTX_get_app_data(ctx);
	int p;
	p = EVP_PKEY_CTX_get_keygen_info(ctx, 0);
	if (p == 0)
		c = '.';
	if (p == 1)
		c = '+';
	if (p == 2)
		c = '*';
	if (p == 3)
		c = '\n';
	BIO_write(b, &c, 1);
	(void) BIO_flush(b);
	return 1;
}