/* $OpenBSD: openssl.c,v 1.30 2019/11/04 15:25:54 jsing 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_SM3
        { FUNC_TYPE_MD, "sm3", dgst_main },
        { FUNC_TYPE_MD, "sm3WithRSAEncryption", 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
#ifndef OPENSSL_NO_SM4
        { FUNC_TYPE_CIPHER, "sm4", enc_main },
        { FUNC_TYPE_CIPHER, "sm4-ecb", enc_main },
        { FUNC_TYPE_CIPHER, "sm4-cbc", enc_main },
        { FUNC_TYPE_CIPHER, "sm4-ofb", enc_main },
        { FUNC_TYPE_CIPHER, "sm4-cfb", 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
openssl_startup(void)
{
#ifndef _WIN32
        signal(SIGPIPE, SIG_IGN);
#endif

        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 cpath wpath rpath inet dns proc flock tty", 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);
        }

        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);
}