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Initial support for pledges in openssl(1) commands.

openssl(1) has two mechanisms for operating: either a single execution
of one command (looking at argv[0] or argv[1]) or as an interactive
session than may execute any number of commands.

We already have a top level pledge that should cover all commands
and that's what interactive mode must continue using.  However, we can
tighten up the pledges when only executing one command.

This is an initial stab at support and may contain regressions.  Most
commands only need "stdio rpath wpath cpath".  The pledges could be
further restricted by evaluating the situation after parsing options.

deraadt@ and beck@ are roughly fine with this approach.

/* $OpenBSD: openssl.c,v 1.17 2015/10/10 22:28:51 doug Exp $ */
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
 * All rights reserved.
 *
 * This package is an SSL implementation written
 * by Eric Young (eay@cryptsoft.com).
 * The implementation was written so as to conform with Netscapes SSL.
 *
 * This library is free for commercial and non-commercial use as long as
 * the following conditions are aheared to.  The following conditions
 * apply to all code found in this distribution, be it the RC4, RSA,
 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
 * included with this distribution is covered by the same copyright terms
 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
 *
 * Copyright remains Eric Young's, and as such any Copyright notices in
 * the code are not to be removed.
 * If this package is used in a product, Eric Young should be given attribution
 * as the author of the parts of the library used.
 * This can be in the form of a textual message at program startup or
 * in documentation (online or textual) provided with the package.
 *
 * 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 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 acknowledgement:
 *    "This product includes cryptographic software written by
 *     Eric Young (eay@cryptsoft.com)"
 *    The word 'cryptographic' can be left out if the rouines from the library
 *    being used are not cryptographic related :-).
 * 4. If you include any Windows specific code (or a derivative thereof) from
 *    the apps directory (application code) you must include an acknowledgement:
 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
 *
 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
 * ANY EXPRESS 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 AUTHOR OR 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.
 *
 * The licence and distribution terms for any publically available version or
 * derivative of this code cannot be changed.  i.e. this code cannot simply be
 * copied and put under another distribution licence
 * [including the GNU Public Licence.]
 */
/* ====================================================================
 * Copyright (c) 1998-2006 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
 *    openssl-core@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 <err.h>
#include <signal.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>

#include "apps.h"

#include <openssl/bio.h>
#include <openssl/conf.h>
#include <openssl/crypto.h>
#include <openssl/err.h>
#include <openssl/lhash.h>
#include <openssl/pem.h>
#include <openssl/ssl.h>
#include <openssl/x509.h>

#include "progs.h"
#include "s_apps.h"

#define FUNC_TYPE_GENERAL       1
#define FUNC_TYPE_MD            2
#define FUNC_TYPE_CIPHER        3
#define FUNC_TYPE_PKEY          4
#define FUNC_TYPE_MD_ALG        5
#define FUNC_TYPE_CIPHER_ALG    6

int single_execution = 0;

typedef struct {
        int type;
        const char *name;
        int (*func)(int argc, char **argv);
} FUNCTION;

DECLARE_LHASH_OF(FUNCTION);

FUNCTION functions[] = {

	/* General functions. */
	{ FUNC_TYPE_GENERAL, "asn1parse", asn1parse_main },
	{ FUNC_TYPE_GENERAL, "ca", ca_main },
	{ FUNC_TYPE_GENERAL, "certhash", certhash_main },
	{ FUNC_TYPE_GENERAL, "ciphers", ciphers_main },
#ifndef OPENSSL_NO_CMS
	{ FUNC_TYPE_GENERAL, "cms", cms_main },
#endif
	{ FUNC_TYPE_GENERAL, "crl2pkcs7", crl2pkcs7_main },
	{ FUNC_TYPE_GENERAL, "crl", crl_main },
	{ FUNC_TYPE_GENERAL, "dgst", dgst_main },
	{ FUNC_TYPE_GENERAL, "enc", enc_main },
	{ FUNC_TYPE_GENERAL, "errstr", errstr_main },
	{ FUNC_TYPE_GENERAL, "genpkey", genpkey_main },
	{ FUNC_TYPE_GENERAL, "nseq", nseq_main },
#ifndef OPENSSL_NO_OCSP
	{ FUNC_TYPE_GENERAL, "ocsp", ocsp_main },
#endif
	{ FUNC_TYPE_GENERAL, "passwd", passwd_main },
	{ FUNC_TYPE_GENERAL, "pkcs7", pkcs7_main },
	{ FUNC_TYPE_GENERAL, "pkcs8", pkcs8_main },
#if !defined(OPENSSL_NO_DES) && !defined(OPENSSL_NO_SHA1)
	{ FUNC_TYPE_GENERAL, "pkcs12", pkcs12_main },
#endif
	{ FUNC_TYPE_GENERAL, "pkey", pkey_main },
	{ FUNC_TYPE_GENERAL, "pkeyparam", pkeyparam_main },
	{ FUNC_TYPE_GENERAL, "pkeyutl", pkeyutl_main },
	{ FUNC_TYPE_GENERAL, "prime", prime_main },
	{ FUNC_TYPE_GENERAL, "rand", rand_main },
	{ FUNC_TYPE_GENERAL, "req", req_main },
	{ FUNC_TYPE_GENERAL, "s_client", s_client_main },
	{ FUNC_TYPE_GENERAL, "s_server", s_server_main },
	{ FUNC_TYPE_GENERAL, "s_time", s_time_main },
	{ FUNC_TYPE_GENERAL, "sess_id", sess_id_main },
	{ FUNC_TYPE_GENERAL, "smime", smime_main },
#ifndef OPENSSL_NO_SPEED
	{ FUNC_TYPE_GENERAL, "speed", speed_main },
#endif
	{ FUNC_TYPE_GENERAL, "spkac", spkac_main },
	{ FUNC_TYPE_GENERAL, "ts", ts_main },
	{ FUNC_TYPE_GENERAL, "verify", verify_main },
	{ FUNC_TYPE_GENERAL, "version", version_main },
	{ FUNC_TYPE_GENERAL, "x509", x509_main },

#ifndef OPENSSL_NO_DH
	{ FUNC_TYPE_GENERAL, "dh", dh_main },
	{ FUNC_TYPE_GENERAL, "dhparam", dhparam_main },
	{ FUNC_TYPE_GENERAL, "gendh", gendh_main },
#endif
#ifndef OPENSSL_NO_DSA
	{ FUNC_TYPE_GENERAL, "dsa", dsa_main },
	{ FUNC_TYPE_GENERAL, "dsaparam", dsaparam_main },
	{ FUNC_TYPE_GENERAL, "gendsa", gendsa_main },
#endif
#ifndef OPENSSL_NO_EC
	{ FUNC_TYPE_GENERAL, "ec", ec_main },
	{ FUNC_TYPE_GENERAL, "ecparam", ecparam_main },
#endif
#ifndef OPENSSL_NO_RSA
	{ FUNC_TYPE_GENERAL, "genrsa", genrsa_main },
	{ FUNC_TYPE_GENERAL, "rsa", rsa_main },
	{ FUNC_TYPE_GENERAL, "rsautl", rsautl_main },
#endif

	/* Message Digests. */
#ifndef OPENSSL_NO_GOST
	{ FUNC_TYPE_MD, "gost-mac", dgst_main },
	{ FUNC_TYPE_MD, "md_gost94", dgst_main },
	{ FUNC_TYPE_MD, "streebog256", dgst_main },
	{ FUNC_TYPE_MD, "streebog512", dgst_main },
#endif
#ifndef OPENSSL_NO_MD4
	{ FUNC_TYPE_MD, "md4", dgst_main },
#endif
#ifndef OPENSSL_NO_MD5
	{ FUNC_TYPE_MD, "md5", dgst_main },
#endif
#ifndef OPENSSL_NO_RIPEMD160
	{ FUNC_TYPE_MD, "ripemd160", dgst_main },
#endif
#ifndef OPENSSL_NO_SHA1
	{ FUNC_TYPE_MD, "sha1", dgst_main },
#endif
#ifndef OPENSSL_NO_SHA224
	{ FUNC_TYPE_MD, "sha224", dgst_main },
#endif
#ifndef OPENSSL_NO_SHA256
	{ FUNC_TYPE_MD, "sha256", dgst_main },
#endif
#ifndef OPENSSL_NO_SHA384
	{ FUNC_TYPE_MD, "sha384", dgst_main },
#endif
#ifndef OPENSSL_NO_SHA512
	{ FUNC_TYPE_MD, "sha512", dgst_main },
#endif
#ifndef OPENSSL_NO_WHIRLPOOL
	{ FUNC_TYPE_MD, "whirlpool", dgst_main },
#endif

	/* Ciphers. */
	{ FUNC_TYPE_CIPHER, "base64", enc_main },
#ifndef OPENSSL_NO_AES
	{ FUNC_TYPE_CIPHER, "aes-128-cbc", enc_main },
	{ FUNC_TYPE_CIPHER, "aes-128-ecb", enc_main },
	{ FUNC_TYPE_CIPHER, "aes-192-cbc", enc_main },
	{ FUNC_TYPE_CIPHER, "aes-192-ecb", enc_main },
	{ FUNC_TYPE_CIPHER, "aes-256-cbc", enc_main },
	{ FUNC_TYPE_CIPHER, "aes-256-ecb", enc_main },
#endif
#ifndef OPENSSL_NO_BF
	{ FUNC_TYPE_CIPHER, "bf", enc_main },
	{ FUNC_TYPE_CIPHER, "bf-cbc", enc_main },
	{ FUNC_TYPE_CIPHER, "bf-ecb", enc_main },
	{ FUNC_TYPE_CIPHER, "bf-cfb", enc_main },
	{ FUNC_TYPE_CIPHER, "bf-ofb", enc_main },
#endif
#ifndef OPENSSL_NO_CAMELLIA
	{ FUNC_TYPE_CIPHER, "camellia-128-cbc", enc_main },
	{ FUNC_TYPE_CIPHER, "camellia-128-ecb", enc_main },
	{ FUNC_TYPE_CIPHER, "camellia-192-cbc", enc_main },
	{ FUNC_TYPE_CIPHER, "camellia-192-ecb", enc_main },
	{ FUNC_TYPE_CIPHER, "camellia-256-cbc", enc_main },
	{ FUNC_TYPE_CIPHER, "camellia-256-ecb", enc_main },
#endif
#ifndef OPENSSL_NO_CAST
	{ FUNC_TYPE_CIPHER, "cast", enc_main },
	{ FUNC_TYPE_CIPHER, "cast5-cbc", enc_main },
	{ FUNC_TYPE_CIPHER, "cast5-ecb", enc_main },
	{ FUNC_TYPE_CIPHER, "cast5-cfb", enc_main },
	{ FUNC_TYPE_CIPHER, "cast5-ofb", enc_main },
	{ FUNC_TYPE_CIPHER, "cast-cbc", enc_main },
#endif
#ifndef OPENSSL_NO_CHACHA
	{ FUNC_TYPE_CIPHER, "chacha", enc_main },
#endif
#ifndef OPENSSL_NO_DES
	{ FUNC_TYPE_CIPHER, "des", enc_main },
	{ FUNC_TYPE_CIPHER, "des3", enc_main },
	{ FUNC_TYPE_CIPHER, "desx", enc_main },
	{ FUNC_TYPE_CIPHER, "des-ecb", enc_main },
	{ FUNC_TYPE_CIPHER, "des-ede", enc_main },
	{ FUNC_TYPE_CIPHER, "des-ede3", enc_main },
	{ FUNC_TYPE_CIPHER, "des-cbc", enc_main },
	{ FUNC_TYPE_CIPHER, "des-ede-cbc", enc_main },
	{ FUNC_TYPE_CIPHER, "des-ede3-cbc", enc_main },
	{ FUNC_TYPE_CIPHER, "des-cfb", enc_main },
	{ FUNC_TYPE_CIPHER, "des-ede-cfb", enc_main },
	{ FUNC_TYPE_CIPHER, "des-ede3-cfb", enc_main },
	{ FUNC_TYPE_CIPHER, "des-ofb", enc_main },
	{ FUNC_TYPE_CIPHER, "des-ede-ofb", enc_main },
	{ FUNC_TYPE_CIPHER, "des-ede3-ofb", enc_main },
#endif
#ifndef OPENSSL_NO_IDEA
	{ FUNC_TYPE_CIPHER, "idea", enc_main },
	{ FUNC_TYPE_CIPHER, "idea-cbc", enc_main },
	{ FUNC_TYPE_CIPHER, "idea-ecb", enc_main },
	{ FUNC_TYPE_CIPHER, "idea-cfb", enc_main },
	{ FUNC_TYPE_CIPHER, "idea-ofb", enc_main },
#endif
#ifndef OPENSSL_NO_RC2
	{ FUNC_TYPE_CIPHER, "rc2", enc_main },
	{ FUNC_TYPE_CIPHER, "rc2-cbc", enc_main },
	{ FUNC_TYPE_CIPHER, "rc2-ecb", enc_main },
	{ FUNC_TYPE_CIPHER, "rc2-cfb", enc_main },
	{ FUNC_TYPE_CIPHER, "rc2-ofb", enc_main },
	{ FUNC_TYPE_CIPHER, "rc2-64-cbc", enc_main },
	{ FUNC_TYPE_CIPHER, "rc2-40-cbc", enc_main },
#endif
#ifndef OPENSSL_NO_RC4
	{ FUNC_TYPE_CIPHER, "rc4", enc_main },
	{ FUNC_TYPE_CIPHER, "rc4-40", enc_main },
#endif
#ifdef ZLIB
	{ FUNC_TYPE_CIPHER, "zlib", enc_main },
#endif

	{ 0, NULL, NULL }
};

static void openssl_startup(void);
static void openssl_shutdown(void);

/* The LHASH callbacks ("hash" & "cmp") have been replaced by functions with the
 * base prototypes (we cast each variable inside the function to the required
 * type of "FUNCTION*"). This removes the necessity for macro-generated wrapper
 * functions. */

static LHASH_OF(FUNCTION) *prog_init(void);
static int do_cmd(LHASH_OF(FUNCTION) *prog, int argc, char *argv[]);
static void list_pkey(BIO * out);
static void list_cipher(BIO * out);
static void list_md(BIO * out);
char *default_config_file = NULL;

CONF *config = NULL;
BIO *bio_err = NULL;

static void
lock_dbg_cb(int mode, int type, const char *file, int line)
{
	static int modes[CRYPTO_NUM_LOCKS];	/* = {0, 0, ... } */
	const char *errstr = NULL;
	int rw;

	rw = mode & (CRYPTO_READ | CRYPTO_WRITE);
	if (!((rw == CRYPTO_READ) || (rw == CRYPTO_WRITE))) {
		errstr = "invalid mode";
		goto err;
	}
	if (type < 0 || type >= CRYPTO_NUM_LOCKS) {
		errstr = "type out of bounds";
		goto err;
	}
	if (mode & CRYPTO_LOCK) {
		if (modes[type]) {
			errstr = "already locked";
			/*
			 * must not happen in a single-threaded program
			 * (would deadlock)
			 */
			goto err;
		}
		modes[type] = rw;
	} else if (mode & CRYPTO_UNLOCK) {
		if (!modes[type]) {
			errstr = "not locked";
			goto err;
		}
		if (modes[type] != rw) {
			errstr = (rw == CRYPTO_READ) ?
			    "CRYPTO_r_unlock on write lock" :
			    "CRYPTO_w_unlock on read lock";
		}
		modes[type] = 0;
	} else {
		errstr = "invalid mode";
		goto err;
	}

err:
	if (errstr) {
		/* we cannot use bio_err here */
		fprintf(stderr, "openssl (lock_dbg_cb): %s (mode=%d, type=%d) at %s:%d\n",
		    errstr, mode, type, file, line);
	}
}

static void
openssl_startup(void)
{
	signal(SIGPIPE, SIG_IGN);

	OpenSSL_add_all_algorithms();
	SSL_library_init();
	SSL_load_error_strings();

	setup_ui();
}

static void
openssl_shutdown(void)
{
	CONF_modules_unload(1);
	destroy_ui();
	OBJ_cleanup();
	EVP_cleanup();
	CRYPTO_cleanup_all_ex_data();
	ERR_remove_thread_state(NULL);
	ERR_free_strings();
}

int
main(int argc, char **argv)
{
	ARGS arg;
#define PROG_NAME_SIZE	39
	char pname[PROG_NAME_SIZE + 1];
	FUNCTION f, *fp;
	const char *prompt;
	char buf[1024];
	char *to_free = NULL;
	int n, i, ret = 0;
	char *p;
	LHASH_OF(FUNCTION) * prog = NULL;
	long errline;

	arg.data = NULL;
	arg.count = 0;

	if (pledge("stdio inet rpath wpath cpath proc", NULL) == -1) {
		fprintf(stderr, "openssl: pledge: %s\n", strerror(errno));
		exit(1);
	}

	bio_err = BIO_new_fp(stderr, BIO_NOCLOSE);
	if (bio_err == NULL) {
		fprintf(stderr, "openssl: failed to initialise bio_err\n");
		exit(1);
	}

	if (BIO_sock_init() != 1) {
		BIO_printf(bio_err, "BIO_sock_init failed\n");
		exit(1);
	}

	CRYPTO_set_locking_callback(lock_dbg_cb);

	openssl_startup();

	/* Lets load up our environment a little */
	p = getenv("OPENSSL_CONF");
	if (p == NULL) {
		p = to_free = make_config_name();
		if (p == NULL) {
			BIO_printf(bio_err, "error making config file name\n");
			goto end;
		}
	}

	default_config_file = p;

	config = NCONF_new(NULL);
	i = NCONF_load(config, p, &errline);
	if (i == 0) {
		if (ERR_GET_REASON(ERR_peek_last_error()) ==
		    CONF_R_NO_SUCH_FILE) {
			BIO_printf(bio_err,
			    "WARNING: can't open config file: %s\n", p);
			ERR_clear_error();
			NCONF_free(config);
			config = NULL;
		} else {
			ERR_print_errors(bio_err);
			NCONF_free(config);
			exit(1);
		}
	}

	if (!load_config(bio_err, NULL)) {
		BIO_printf(bio_err, "failed to load configuration\n");
		goto end;
	}

	prog = prog_init();

	/* first check the program name */
	program_name(argv[0], pname, sizeof pname);

	f.name = pname;
	fp = lh_FUNCTION_retrieve(prog, &f);
	if (fp != NULL) {
		argv[0] = pname;

		single_execution = 1;
		ret = fp->func(argc, argv);
		goto end;
	}
	/*
	 * ok, now check that there are not arguments, if there are, run with
	 * them, shifting the ssleay off the front
	 */
	if (argc != 1) {
		argc--;
		argv++;

		single_execution = 1;
		ret = do_cmd(prog, argc, argv);
		if (ret < 0)
			ret = 0;
		goto end;
	}
	/* ok, lets enter the old 'OpenSSL>' mode */

	for (;;) {
		ret = 0;
		p = buf;
		n = sizeof buf;
		i = 0;
		for (;;) {
			p[0] = '\0';
			if (i++)
				prompt = ">";
			else
				prompt = "OpenSSL> ";
			fputs(prompt, stdout);
			fflush(stdout);
			if (!fgets(p, n, stdin))
				goto end;
			if (p[0] == '\0')
				goto end;
			i = strlen(p);
			if (i <= 1)
				break;
			if (p[i - 2] != '\\')
				break;
			i -= 2;
			p += i;
			n -= i;
		}
		if (!chopup_args(&arg, buf, &argc, &argv))
			break;

		ret = do_cmd(prog, argc, argv);
		if (ret < 0) {
			ret = 0;
			goto end;
		}
		if (ret != 0)
			BIO_printf(bio_err, "error in %s\n", argv[0]);
		(void) BIO_flush(bio_err);
	}
	BIO_printf(bio_err, "bad exit\n");
	ret = 1;

end:
	free(to_free);

	if (config != NULL) {
		NCONF_free(config);
		config = NULL;
	}
	if (prog != NULL)
		lh_FUNCTION_free(prog);
	free(arg.data);

	openssl_shutdown();

	if (bio_err != NULL) {
		BIO_free(bio_err);
		bio_err = NULL;
	}
	return (ret);
}

#define LIST_STANDARD_COMMANDS "list-standard-commands"
#define LIST_MESSAGE_DIGEST_COMMANDS "list-message-digest-commands"
#define LIST_MESSAGE_DIGEST_ALGORITHMS "list-message-digest-algorithms"
#define LIST_CIPHER_COMMANDS "list-cipher-commands"
#define LIST_CIPHER_ALGORITHMS "list-cipher-algorithms"
#define LIST_PUBLIC_KEY_ALGORITHMS "list-public-key-algorithms"


static int
do_cmd(LHASH_OF(FUNCTION) * prog, int argc, char *argv[])
{
	FUNCTION f, *fp;
	int i, ret = 1, tp, nl;

	if ((argc <= 0) || (argv[0] == NULL)) {
		ret = 0;
		goto end;
	}
	f.name = argv[0];
	fp = lh_FUNCTION_retrieve(prog, &f);
	if (fp == NULL) {
		if (EVP_get_digestbyname(argv[0])) {
			f.type = FUNC_TYPE_MD;
			f.func = dgst_main;
			fp = &f;
		} else if (EVP_get_cipherbyname(argv[0])) {
			f.type = FUNC_TYPE_CIPHER;
			f.func = enc_main;
			fp = &f;
		}
	}
	if (fp != NULL) {
		ret = fp->func(argc, argv);
	} else if ((strncmp(argv[0], "no-", 3)) == 0) {
		BIO *bio_stdout = BIO_new_fp(stdout, BIO_NOCLOSE);
		f.name = argv[0] + 3;
		ret = (lh_FUNCTION_retrieve(prog, &f) != NULL);
		if (!ret)
			BIO_printf(bio_stdout, "%s\n", argv[0]);
		else
			BIO_printf(bio_stdout, "%s\n", argv[0] + 3);
		BIO_free_all(bio_stdout);
		goto end;
	} else if ((strcmp(argv[0], "quit") == 0) ||
	    (strcmp(argv[0], "q") == 0) ||
	    (strcmp(argv[0], "exit") == 0) ||
	    (strcmp(argv[0], "bye") == 0)) {
		ret = -1;
		goto end;
	} else if ((strcmp(argv[0], LIST_STANDARD_COMMANDS) == 0) ||
	    (strcmp(argv[0], LIST_MESSAGE_DIGEST_COMMANDS) == 0) ||
	    (strcmp(argv[0], LIST_MESSAGE_DIGEST_ALGORITHMS) == 0) ||
	    (strcmp(argv[0], LIST_CIPHER_COMMANDS) == 0) ||
	    (strcmp(argv[0], LIST_CIPHER_ALGORITHMS) == 0) ||
	    (strcmp(argv[0], LIST_PUBLIC_KEY_ALGORITHMS) == 0)) {
		int list_type;
		BIO *bio_stdout;

		if (strcmp(argv[0], LIST_STANDARD_COMMANDS) == 0)
			list_type = FUNC_TYPE_GENERAL;
		else if (strcmp(argv[0], LIST_MESSAGE_DIGEST_COMMANDS) == 0)
			list_type = FUNC_TYPE_MD;
		else if (strcmp(argv[0], LIST_MESSAGE_DIGEST_ALGORITHMS) == 0)
			list_type = FUNC_TYPE_MD_ALG;
		else if (strcmp(argv[0], LIST_PUBLIC_KEY_ALGORITHMS) == 0)
			list_type = FUNC_TYPE_PKEY;
		else if (strcmp(argv[0], LIST_CIPHER_ALGORITHMS) == 0)
			list_type = FUNC_TYPE_CIPHER_ALG;
		else		/* strcmp(argv[0],LIST_CIPHER_COMMANDS) == 0 */
			list_type = FUNC_TYPE_CIPHER;
		bio_stdout = BIO_new_fp(stdout, BIO_NOCLOSE);

		if (list_type == FUNC_TYPE_PKEY)
			list_pkey(bio_stdout);
		if (list_type == FUNC_TYPE_MD_ALG)
			list_md(bio_stdout);
		if (list_type == FUNC_TYPE_CIPHER_ALG)
			list_cipher(bio_stdout);
		else {
			for (fp = functions; fp->name != NULL; fp++)
				if (fp->type == list_type)
					BIO_printf(bio_stdout, "%s\n",
					    fp->name);
		}
		BIO_free_all(bio_stdout);
		ret = 0;
		goto end;
	} else {
		BIO_printf(bio_err,
		    "openssl:Error: '%s' is an invalid command.\n",
		    argv[0]);
		BIO_printf(bio_err, "\nStandard commands");
		i = 0;
		tp = 0;
		for (fp = functions; fp->name != NULL; fp++) {
			nl = 0;
#ifdef OPENSSL_NO_CAMELLIA
			if (((i++) % 5) == 0)
#else
			if (((i++) % 4) == 0)
#endif
			{
				BIO_printf(bio_err, "\n");
				nl = 1;
			}
			if (fp->type != tp) {
				tp = fp->type;
				if (!nl)
					BIO_printf(bio_err, "\n");
				if (tp == FUNC_TYPE_MD) {
					i = 1;
					BIO_printf(bio_err,
					    "\nMessage Digest commands (see the `dgst' command for more details)\n");
				} else if (tp == FUNC_TYPE_CIPHER) {
					i = 1;
					BIO_printf(bio_err, "\nCipher commands (see the `enc' command for more details)\n");
				}
			}
#ifdef OPENSSL_NO_CAMELLIA
			BIO_printf(bio_err, "%-15s", fp->name);
#else
			BIO_printf(bio_err, "%-18s", fp->name);
#endif
		}
		BIO_printf(bio_err, "\n\n");
		ret = 0;
	}
end:
	return (ret);
}

static int
SortFnByName(const void *_f1, const void *_f2)
{
	const FUNCTION *f1 = _f1;
	const FUNCTION *f2 = _f2;

	if (f1->type != f2->type)
		return f1->type - f2->type;
	return strcmp(f1->name, f2->name);
}

static void
list_pkey(BIO * out)
{
	int i;

	for (i = 0; i < EVP_PKEY_asn1_get_count(); i++) {
		const EVP_PKEY_ASN1_METHOD *ameth;
		int pkey_id, pkey_base_id, pkey_flags;
		const char *pinfo, *pem_str;
		ameth = EVP_PKEY_asn1_get0(i);
		EVP_PKEY_asn1_get0_info(&pkey_id, &pkey_base_id, &pkey_flags,
		    &pinfo, &pem_str, ameth);
		if (pkey_flags & ASN1_PKEY_ALIAS) {
			BIO_printf(out, "Name: %s\n",
			    OBJ_nid2ln(pkey_id));
			BIO_printf(out, "\tType: Alias to %s\n",
			    OBJ_nid2ln(pkey_base_id));
		} else {
			BIO_printf(out, "Name: %s\n", pinfo);
			BIO_printf(out, "\tType: %s Algorithm\n",
			    pkey_flags & ASN1_PKEY_DYNAMIC ?
			    "External" : "Builtin");
			BIO_printf(out, "\tOID: %s\n", OBJ_nid2ln(pkey_id));
			if (pem_str == NULL)
				pem_str = "(none)";
			BIO_printf(out, "\tPEM string: %s\n", pem_str);
		}

	}
}

static void
list_cipher_fn(const EVP_CIPHER * c, const char *from, const char *to,
    void *arg)
{
	if (c)
		BIO_printf(arg, "%s\n", EVP_CIPHER_name(c));
	else {
		if (!from)
			from = "<undefined>";
		if (!to)
			to = "<undefined>";
		BIO_printf(arg, "%s => %s\n", from, to);
	}
}

static void
list_cipher(BIO * out)
{
	EVP_CIPHER_do_all_sorted(list_cipher_fn, out);
}

static void
list_md_fn(const EVP_MD * m, const char *from, const char *to, void *arg)
{
	if (m)
		BIO_printf(arg, "%s\n", EVP_MD_name(m));
	else {
		if (!from)
			from = "<undefined>";
		if (!to)
			to = "<undefined>";
		BIO_printf(arg, "%s => %s\n", from, to);
	}
}

static void
list_md(BIO * out)
{
	EVP_MD_do_all_sorted(list_md_fn, out);
}

static int
function_cmp(const FUNCTION * a, const FUNCTION * b)
{
	return strncmp(a->name, b->name, 8);
}

static IMPLEMENT_LHASH_COMP_FN(function, FUNCTION)

static unsigned long
function_hash(const FUNCTION * a)
{
	return lh_strhash(a->name);
}

static IMPLEMENT_LHASH_HASH_FN(function, FUNCTION)

static LHASH_OF(FUNCTION) *
prog_init(void)
{
	LHASH_OF(FUNCTION) * ret;
	FUNCTION *f;
	size_t i;

	/* Purely so it looks nice when the user hits ? */
	for (i = 0, f = functions; f->name != NULL; ++f, ++i)
		;
	qsort(functions, i, sizeof *functions, SortFnByName);

	if ((ret = lh_FUNCTION_new()) == NULL)
		return (NULL);

	for (f = functions; f->name != NULL; f++)
		(void) lh_FUNCTION_insert(ret, f);
	return (ret);
}