apps/openssl.c - third_party/openssl - Git at Google

 /*
  * Copyright 1995-2017 The OpenSSL Project Authors. All Rights Reserved.
  *
  * Licensed under the OpenSSL license (the "License").  You may not use
  * this file except in compliance with the License.  You can obtain a copy
  * in the file LICENSE in the source distribution or at
  * https://www.openssl.org/source/license.html
  */

 #include <stdio.h>
 #include <string.h>
 #include <stdlib.h>
 #include <openssl/bio.h>
 #include <openssl/crypto.h>
 #include <openssl/lhash.h>
 #include <openssl/conf.h>
 #include <openssl/x509.h>
 #include <openssl/pem.h>
 #include <openssl/ssl.h>
 #ifndef OPENSSL_NO_ENGINE
 # include <openssl/engine.h>
 #endif
 #include <openssl/err.h>
 #define USE_SOCKETS /* needed for the _O_BINARY defs in the MS world */
 #include "s_apps.h"
 /* Needed to get the other O_xxx flags. */
 #ifdef OPENSSL_SYS_VMS
 # include <unixio.h>
 #endif
 #define INCLUDE_FUNCTION_TABLE
 #include "apps.h"


 #ifdef OPENSSL_NO_CAMELLIA
 # define FORMAT "%-15s"
 # define COLUMNS 5
 #else
 # define FORMAT "%-18s"
 # define COLUMNS 4
 #endif

 /* Special sentinel to exit the program. */
 #define EXIT_THE_PROGRAM (-1)

 /*
  * The LHASH callbacks ("hash" & "cmp") have been replaced by functions with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(void);
 static void list_type(FUNC_TYPE ft);
 static void list_disabled(void);
 char *default_config_file = NULL;

 BIO *bio_in = NULL;
 BIO *bio_out = NULL;
 BIO *bio_err = NULL;

 static int apps_startup()
 {
 #ifdef SIGPIPE
     signal(SIGPIPE, SIG_IGN);
 #endif

     /* Set non-default library initialisation settings */
     if (!OPENSSL_init_crypto(OPENSSL_INIT_ENGINE_ALL_BUILTIN
                              | OPENSSL_INIT_LOAD_CONFIG, NULL))
         return 0;

 #ifndef OPENSSL_NO_UI
     setup_ui_method();
 #endif

     return 1;
 }

 static void apps_shutdown()
 {
 #ifndef OPENSSL_NO_UI
     destroy_ui_method();
 #endif
 }

 static char *make_config_name()
 {
     const char *t;
     size_t len;
     char *p;

     if ((t = getenv("OPENSSL_CONF")) != NULL)
         return OPENSSL_strdup(t);

     t = X509_get_default_cert_area();
     len = strlen(t) + 1 + strlen(OPENSSL_CONF) + 1;
     p = app_malloc(len, "config filename buffer");
     strcpy(p, t);
 #ifndef OPENSSL_SYS_VMS
     strcat(p, "/");
 #endif
     strcat(p, OPENSSL_CONF);

     return p;
 }

 int main(int argc, char *argv[])
 {
     FUNCTION f, *fp;
     LHASH_OF(FUNCTION) *prog = NULL;
     char **copied_argv = NULL;
     char *p, *pname;
     char buf[1024];
     const char *prompt;
     ARGS arg;
     int first, n, i, ret = 0;

     arg.argv = NULL;
     arg.size = 0;

     /* Set up some of the environment. */
     default_config_file = make_config_name();
     bio_in = dup_bio_in(FORMAT_TEXT);
     bio_out = dup_bio_out(FORMAT_TEXT);
     bio_err = dup_bio_err(FORMAT_TEXT);

 #if defined(OPENSSL_SYS_VMS) && defined(__DECC)
     copied_argv = argv = copy_argv(&argc, argv);
 #elif defined(_WIN32)
     /*
      * Replace argv[] with UTF-8 encoded strings.
      */
     win32_utf8argv(&argc, &argv);
 #endif

     p = getenv("OPENSSL_DEBUG_MEMORY");
     if (p != NULL && strcmp(p, "on") == 0)
         CRYPTO_set_mem_debug(1);
     CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ON);

     if (getenv("OPENSSL_FIPS")) {
         BIO_printf(bio_err, "FIPS mode not supported.\n");
         return 1;
     }

     if (!apps_startup())
         goto end;

     prog = prog_init();
     pname = opt_progname(argv[0]);

     /* first check the program name */
     f.name = pname;
     fp = lh_FUNCTION_retrieve(prog, &f);
     if (fp != NULL) {
         argv[0] = pname;
         ret = fp->func(argc, argv);
         goto end;
     }

     /* If there is stuff on the command line, run with that. */
     if (argc != 1) {
         argc--;
         argv++;
         ret = do_cmd(prog, argc, argv);
         if (ret < 0)
             ret = 0;
         goto end;
     }

     /* ok, lets enter interactive mode */
     for (;;) {
         ret = 0;
         /* Read a line, continue reading if line ends with \ */
         for (p = buf, n = sizeof buf, i = 0, first = 1; n > 0; first = 0) {
             prompt = first ? "OpenSSL> " : "> ";
             p[0] = '\0';
 #ifndef READLINE
             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;
 #else
             {
                 extern char *readline(const char *);
                 extern void add_history(const char *cp);
                 char *text;

                 text = readline(prompt);
                 if (text == NULL)
                     goto end;
                 i = strlen(text);
                 if (i == 0 || i > n)
                     break;
                 if (text[i - 1] != '\\') {
                     p += strlen(strcpy(p, text));
                     free(text);
                     add_history(buf);
                     break;
                 }

                 text[i - 1] = '\0';
                 p += strlen(strcpy(p, text));
                 free(text);
                 n -= i;
             }
 #endif
         }

         if (!chopup_args(&arg, buf)) {
             BIO_printf(bio_err, "Can't parse (no memory?)\n");
             break;
         }

         ret = do_cmd(prog, arg.argc, arg.argv);
         if (ret == EXIT_THE_PROGRAM) {
             ret = 0;
             goto end;
         }
         if (ret != 0)
             BIO_printf(bio_err, "error in %s\n", arg.argv[0]);
         (void)BIO_flush(bio_out);
         (void)BIO_flush(bio_err);
     }
     ret = 1;
  end:
     OPENSSL_free(copied_argv);
     OPENSSL_free(default_config_file);
     lh_FUNCTION_free(prog);
     OPENSSL_free(arg.argv);

     BIO_free(bio_in);
     BIO_free_all(bio_out);
     apps_shutdown();
 #ifndef OPENSSL_NO_CRYPTO_MDEBUG
     if (CRYPTO_mem_leaks(bio_err) <= 0)
         ret = 1;
 #endif
     BIO_free(bio_err);
     EXIT(ret);
 }

 const OPTIONS exit_options[] = {
     {NULL}
 };

 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_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((BIO *)arg, "%s => %s\n", from, to);
     }
 }

 static void list_missing_help(void)
 {
     const FUNCTION *fp;
     const OPTIONS *o;

     for (fp = functions; fp->name != NULL; fp++) {
         if ((o = fp->help) == NULL) {
             BIO_printf(bio_out, "%s *\n", fp->name);
             continue;
         }
         for ( ; o->name != NULL; o++) {
             if (o->helpstr == NULL)
                 BIO_printf(bio_out, "%s %s\n", fp->name, o->name);
         }
     }
 }


 /* Unified enum for help and list commands. */
 typedef enum HELPLIST_CHOICE {
     OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
     OPT_COMMANDS, OPT_DIGEST_COMMANDS,
     OPT_DIGEST_ALGORITHMS, OPT_CIPHER_COMMANDS, OPT_CIPHER_ALGORITHMS,
     OPT_PK_ALGORITHMS, OPT_DISABLED, OPT_MISSING_HELP
 } HELPLIST_CHOICE;

 const OPTIONS list_options[] = {
     {"help", OPT_HELP, '-', "Display this summary"},
     {"commands", OPT_COMMANDS, '-', "List of standard commands"},
     {"digest-commands", OPT_DIGEST_COMMANDS, '-',
      "List of message digest commands"},
     {"digest-algorithms", OPT_DIGEST_ALGORITHMS, '-',
      "List of message digest algorithms"},
     {"cipher-commands", OPT_CIPHER_COMMANDS, '-', "List of cipher commands"},
     {"cipher-algorithms", OPT_CIPHER_ALGORITHMS, '-',
      "List of cipher algorithms"},
     {"public-key-algorithms", OPT_PK_ALGORITHMS, '-',
      "List of public key algorithms"},
     {"disabled", OPT_DISABLED, '-',
      "List of disabled features"},
     {"missing-help", OPT_MISSING_HELP, '-',
      "List missing detailed help strings"},
     {NULL}
 };

 int list_main(int argc, char **argv)
 {
     char *prog;
     HELPLIST_CHOICE o;
     int done = 0;

     prog = opt_init(argc, argv, list_options);
     while ((o = opt_next()) != OPT_EOF) {
         switch (o) {
         case OPT_EOF:  /* Never hit, but suppresses warning */
         case OPT_ERR:
             BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
             return 1;
         case OPT_HELP:
             opt_help(list_options);
             break;
         case OPT_COMMANDS:
             list_type(FT_general);
             break;
         case OPT_DIGEST_COMMANDS:
             list_type(FT_md);
             break;
         case OPT_DIGEST_ALGORITHMS:
             EVP_MD_do_all_sorted(list_md_fn, bio_out);
             break;
         case OPT_CIPHER_COMMANDS:
             list_type(FT_cipher);
             break;
         case OPT_CIPHER_ALGORITHMS:
             EVP_CIPHER_do_all_sorted(list_cipher_fn, bio_out);
             break;
         case OPT_PK_ALGORITHMS:
             list_pkey();
             break;
         case OPT_DISABLED:
             list_disabled();
             break;
         case OPT_MISSING_HELP:
             list_missing_help();
             break;
         }
         done = 1;
     }

     if (!done) {
         BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
         return 1;
     }

     return 0;
 }

 typedef enum HELP_CHOICE {
     OPT_hERR = -1, OPT_hEOF = 0, OPT_hHELP
 } HELP_CHOICE;

 const OPTIONS help_options[] = {
     {"help", OPT_hHELP, '-', "Display this summary"},
     {NULL}
 };


 int help_main(int argc, char **argv)
 {
     FUNCTION *fp;
     int i, nl;
     FUNC_TYPE tp;
     char *prog;
     HELP_CHOICE o;

     prog = opt_init(argc, argv, help_options);
     while ((o = opt_next()) != OPT_hEOF) {
         switch (o) {
         case OPT_hERR:
         case OPT_hEOF:
             BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
             return 1;
         case OPT_hHELP:
             opt_help(help_options);
             return 0;
         }
     }

     if (opt_num_rest() != 0) {
         BIO_printf(bio_err, "Usage: %s\n", prog);
         return 1;
     }

     BIO_printf(bio_err, "\nStandard commands");
     i = 0;
     tp = FT_none;
     for (fp = functions; fp->name != NULL; fp++) {
         nl = 0;
         if (((i++) % COLUMNS) == 0) {
             BIO_printf(bio_err, "\n");
             nl = 1;
         }
         if (fp->type != tp) {
             tp = fp->type;
             if (!nl)
                 BIO_printf(bio_err, "\n");
             if (tp == FT_md) {
                 i = 1;
                 BIO_printf(bio_err,
                            "\nMessage Digest commands (see the `dgst' command for more details)\n");
             } else if (tp == FT_cipher) {
                 i = 1;
                 BIO_printf(bio_err,
                            "\nCipher commands (see the `enc' command for more details)\n");
             }
         }
         BIO_printf(bio_err, FORMAT, fp->name);
     }
     BIO_printf(bio_err, "\n\n");
     return 0;
 }

 int exit_main(int argc, char **argv)
 {
     return EXIT_THE_PROGRAM;
 }

 static void list_type(FUNC_TYPE ft)
 {
     FUNCTION *fp;
     int i = 0;

     for (fp = functions; fp->name != NULL; fp++)
         if (fp->type == ft) {
             if ((i++ % COLUMNS) == 0)
                 BIO_printf(bio_out, "\n");
             BIO_printf(bio_out, FORMAT, fp->name);
         }
     BIO_printf(bio_out, "\n");
 }

 static int do_cmd(LHASH_OF(FUNCTION) *prog, int argc, char *argv[])
 {
     FUNCTION f, *fp;

     if (argc <= 0 || argv[0] == NULL)
         return (0);
     f.name = argv[0];
     fp = lh_FUNCTION_retrieve(prog, &f);
     if (fp == NULL) {
         if (EVP_get_digestbyname(argv[0])) {
             f.type = FT_md;
             f.func = dgst_main;
             fp = &f;
         } else if (EVP_get_cipherbyname(argv[0])) {
             f.type = FT_cipher;
             f.func = enc_main;
             fp = &f;
         }
     }
     if (fp != NULL) {
         return (fp->func(argc, argv));
     }
     if ((strncmp(argv[0], "no-", 3)) == 0) {
         /*
          * User is asking if foo is unsupported, by trying to "run" the
          * no-foo command.  Strange.
          */
         f.name = argv[0] + 3;
         if (lh_FUNCTION_retrieve(prog, &f) == NULL) {
             BIO_printf(bio_out, "%s\n", argv[0]);
             return (0);
         }
         BIO_printf(bio_out, "%s\n", argv[0] + 3);
         return 1;
     }
     if (strcmp(argv[0], "quit") == 0 || strcmp(argv[0], "q") == 0 ||
         strcmp(argv[0], "exit") == 0 || strcmp(argv[0], "bye") == 0)
         /* Special value to mean "exit the program. */
         return EXIT_THE_PROGRAM;

     BIO_printf(bio_err, "Invalid command '%s'; type \"help\" for a list.\n",
                argv[0]);
     return (1);
 }

 static void list_pkey(void)
 {
     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(bio_out, "Name: %s\n", OBJ_nid2ln(pkey_id));
             BIO_printf(bio_out, "\tAlias for: %s\n",
                        OBJ_nid2ln(pkey_base_id));
         } else {
             BIO_printf(bio_out, "Name: %s\n", pinfo);
             BIO_printf(bio_out, "\tType: %s Algorithm\n",
                        pkey_flags & ASN1_PKEY_DYNAMIC ?
                        "External" : "Builtin");
             BIO_printf(bio_out, "\tOID: %s\n", OBJ_nid2ln(pkey_id));
             if (pem_str == NULL)
                 pem_str = "(none)";
             BIO_printf(bio_out, "\tPEM string: %s\n", pem_str);
         }

     }
 }

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

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

 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_disabled(void)
 {
     BIO_puts(bio_out, "Disabled algorithms:\n");
 #ifdef OPENSSL_NO_ARIA
     BIO_puts(bio_out, "ARIA\n");
 #endif
 #ifdef OPENSSL_NO_BF
     BIO_puts(bio_out, "BF\n");
 #endif
 #ifdef OPENSSL_NO_BLAKE2
     BIO_puts(bio_out, "BLAKE2\n");
 #endif
 #ifdef OPENSSL_NO_CAMELLIA
     BIO_puts(bio_out, "CAMELLIA\n");
 #endif
 #ifdef OPENSSL_NO_CAST
     BIO_puts(bio_out, "CAST\n");
 #endif
 #ifdef OPENSSL_NO_CMAC
     BIO_puts(bio_out, "CMAC\n");
 #endif
 #ifdef OPENSSL_NO_CMS
     BIO_puts(bio_out, "CMS\n");
 #endif
 #ifdef OPENSSL_NO_COMP
     BIO_puts(bio_out, "COMP\n");
 #endif
 #ifdef OPENSSL_NO_DES
     BIO_puts(bio_out, "DES\n");
 #endif
 #ifdef OPENSSL_NO_DGRAM
     BIO_puts(bio_out, "DGRAM\n");
 #endif
 #ifdef OPENSSL_NO_DH
     BIO_puts(bio_out, "DH\n");
 #endif
 #ifdef OPENSSL_NO_DSA
     BIO_puts(bio_out, "DSA\n");
 #endif
 #if defined(OPENSSL_NO_DTLS)
     BIO_puts(bio_out, "DTLS\n");
 #endif
 #if defined(OPENSSL_NO_DTLS1)
     BIO_puts(bio_out, "DTLS1\n");
 #endif
 #if defined(OPENSSL_NO_DTLS1_2)
     BIO_puts(bio_out, "DTLS1_2\n");
 #endif
 #ifdef OPENSSL_NO_EC
     BIO_puts(bio_out, "EC\n");
 #endif
 #ifdef OPENSSL_NO_EC2M
     BIO_puts(bio_out, "EC2M\n");
 #endif
 #ifdef OPENSSL_NO_ENGINE
     BIO_puts(bio_out, "ENGINE\n");
 #endif
 #ifdef OPENSSL_NO_GOST
     BIO_puts(bio_out, "GOST\n");
 #endif
 #ifdef OPENSSL_NO_HEARTBEATS
     BIO_puts(bio_out, "HEARTBEATS\n");
 #endif
 #ifdef OPENSSL_NO_IDEA
     BIO_puts(bio_out, "IDEA\n");
 #endif
 #ifdef OPENSSL_NO_MD2
     BIO_puts(bio_out, "MD2\n");
 #endif
 #ifdef OPENSSL_NO_MD4
     BIO_puts(bio_out, "MD4\n");
 #endif
 #ifdef OPENSSL_NO_MD5
     BIO_puts(bio_out, "MD5\n");
 #endif
 #ifdef OPENSSL_NO_MDC2
     BIO_puts(bio_out, "MDC2\n");
 #endif
 #ifdef OPENSSL_NO_OCB
     BIO_puts(bio_out, "OCB\n");
 #endif
 #ifdef OPENSSL_NO_OCSP
     BIO_puts(bio_out, "OCSP\n");
 #endif
 #ifdef OPENSSL_NO_PSK
     BIO_puts(bio_out, "PSK\n");
 #endif
 #ifdef OPENSSL_NO_RC2
     BIO_puts(bio_out, "RC2\n");
 #endif
 #ifdef OPENSSL_NO_RC4
     BIO_puts(bio_out, "RC4\n");
 #endif
 #ifdef OPENSSL_NO_RC5
     BIO_puts(bio_out, "RC5\n");
 #endif
 #ifdef OPENSSL_NO_RMD160
     BIO_puts(bio_out, "RMD160\n");
 #endif
 #ifdef OPENSSL_NO_RSA
     BIO_puts(bio_out, "RSA\n");
 #endif
 #ifdef OPENSSL_NO_SCRYPT
     BIO_puts(bio_out, "SCRYPT\n");
 #endif
 #ifdef OPENSSL_NO_SCTP
     BIO_puts(bio_out, "SCTP\n");
 #endif
 #ifdef OPENSSL_NO_SEED
     BIO_puts(bio_out, "SEED\n");
 #endif
 #ifdef OPENSSL_NO_SOCK
     BIO_puts(bio_out, "SOCK\n");
 #endif
 #ifdef OPENSSL_NO_SRP
     BIO_puts(bio_out, "SRP\n");
 #endif
 #ifdef OPENSSL_NO_SRTP
     BIO_puts(bio_out, "SRTP\n");
 #endif
 #ifdef OPENSSL_NO_SSL3
     BIO_puts(bio_out, "SSL3\n");
 #endif
 #ifdef OPENSSL_NO_TLS1
     BIO_puts(bio_out, "TLS1\n");
 #endif
 #ifdef OPENSSL_NO_TLS1_1
     BIO_puts(bio_out, "TLS1_1\n");
 #endif
 #ifdef OPENSSL_NO_TLS1_2
     BIO_puts(bio_out, "TLS1_2\n");
 #endif
 #ifdef OPENSSL_NO_WHIRLPOOL
     BIO_puts(bio_out, "WHIRLPOOL\n");
 #endif
 #ifndef ZLIB
     BIO_puts(bio_out, "ZLIB\n");
 #endif
 }

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

     /* Sort alphabetically within category. For nicer help displays. */
     for (i = 0, f = functions; f->name != NULL; ++f, ++i) ;
     qsort(functions, i, sizeof(*functions), SortFnByName);

     if ((ret = lh_FUNCTION_new(function_hash, function_cmp)) == NULL)
         return (NULL);

     for (f = functions; f->name != NULL; f++)
         (void)lh_FUNCTION_insert(ret, f);
     return (ret);
 }
	/*
	* Copyright 1995-2017 The OpenSSL Project Authors. All Rights Reserved.
	*
	* Licensed under the OpenSSL license (the "License"). You may not use
	* this file except in compliance with the License. You can obtain a copy
	* in the file LICENSE in the source distribution or at
	* https://www.openssl.org/source/license.html
	*/

	#include <stdio.h>
	#include <string.h>
	#include <stdlib.h>
	#include <openssl/bio.h>
	#include <openssl/crypto.h>
	#include <openssl/lhash.h>
	#include <openssl/conf.h>
	#include <openssl/x509.h>
	#include <openssl/pem.h>
	#include <openssl/ssl.h>
	#ifndef OPENSSL_NO_ENGINE
	# include <openssl/engine.h>
	#endif
	#include <openssl/err.h>
	#define USE_SOCKETS /* needed for the _O_BINARY defs in the MS world */
	#include "s_apps.h"
	/* Needed to get the other O_xxx flags. */
	#ifdef OPENSSL_SYS_VMS
	# include <unixio.h>
	#endif
	#define INCLUDE_FUNCTION_TABLE
	#include "apps.h"


	#ifdef OPENSSL_NO_CAMELLIA
	# define FORMAT "%-15s"
	# define COLUMNS 5
	#else
	# define FORMAT "%-18s"
	# define COLUMNS 4
	#endif

	/* Special sentinel to exit the program. */
	#define EXIT_THE_PROGRAM (-1)

	/*
	* 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(void);
	static void list_type(FUNC_TYPE ft);
	static void list_disabled(void);
	char *default_config_file = NULL;

	BIO *bio_in = NULL;
	BIO *bio_out = NULL;
	BIO *bio_err = NULL;

	static int apps_startup()
	{
	#ifdef SIGPIPE
	signal(SIGPIPE, SIG_IGN);
	#endif

	/* Set non-default library initialisation settings */
	if (!OPENSSL_init_crypto(OPENSSL_INIT_ENGINE_ALL_BUILTIN
	\| OPENSSL_INIT_LOAD_CONFIG, NULL))
	return 0;

	#ifndef OPENSSL_NO_UI
	setup_ui_method();
	#endif

	return 1;
	}

	static void apps_shutdown()
	{
	#ifndef OPENSSL_NO_UI
	destroy_ui_method();
	#endif
	}

	static char *make_config_name()
	{
	const char *t;
	size_t len;
	char *p;

	if ((t = getenv("OPENSSL_CONF")) != NULL)
	return OPENSSL_strdup(t);

	t = X509_get_default_cert_area();
	len = strlen(t) + 1 + strlen(OPENSSL_CONF) + 1;
	p = app_malloc(len, "config filename buffer");
	strcpy(p, t);
	#ifndef OPENSSL_SYS_VMS
	strcat(p, "/");
	#endif
	strcat(p, OPENSSL_CONF);

	return p;
	}

	int main(int argc, char *argv[])
	{
	FUNCTION f, *fp;
	LHASH_OF(FUNCTION) *prog = NULL;
	char **copied_argv = NULL;
	char p, pname;
	char buf[1024];
	const char *prompt;
	ARGS arg;
	int first, n, i, ret = 0;

	arg.argv = NULL;
	arg.size = 0;

	/* Set up some of the environment. */
	default_config_file = make_config_name();
	bio_in = dup_bio_in(FORMAT_TEXT);
	bio_out = dup_bio_out(FORMAT_TEXT);
	bio_err = dup_bio_err(FORMAT_TEXT);

	#if defined(OPENSSL_SYS_VMS) && defined(__DECC)
	copied_argv = argv = copy_argv(&argc, argv);
	#elif defined(_WIN32)
	/*
	* Replace argv[] with UTF-8 encoded strings.
	*/
	win32_utf8argv(&argc, &argv);
	#endif

	p = getenv("OPENSSL_DEBUG_MEMORY");
	if (p != NULL && strcmp(p, "on") == 0)
	CRYPTO_set_mem_debug(1);
	CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ON);

	if (getenv("OPENSSL_FIPS")) {
	BIO_printf(bio_err, "FIPS mode not supported.\n");
	return 1;
	}

	if (!apps_startup())
	goto end;

	prog = prog_init();
	pname = opt_progname(argv[0]);

	/* first check the program name */
	f.name = pname;
	fp = lh_FUNCTION_retrieve(prog, &f);
	if (fp != NULL) {
	argv[0] = pname;
	ret = fp->func(argc, argv);
	goto end;
	}

	/* If there is stuff on the command line, run with that. */
	if (argc != 1) {
	argc--;
	argv++;
	ret = do_cmd(prog, argc, argv);
	if (ret < 0)
	ret = 0;
	goto end;
	}

	/* ok, lets enter interactive mode */
	for (;;) {
	ret = 0;
	/* Read a line, continue reading if line ends with \ */
	for (p = buf, n = sizeof buf, i = 0, first = 1; n > 0; first = 0) {
	prompt = first ? "OpenSSL> " : "> ";
	p[0] = '\0';
	#ifndef READLINE
	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;
	#else
	{
	extern char readline(const char );
	extern void add_history(const char *cp);
	char *text;

	text = readline(prompt);
	if (text == NULL)
	goto end;
	i = strlen(text);
	if (i == 0 \|\| i > n)
	break;
	if (text[i - 1] != '\\') {
	p += strlen(strcpy(p, text));
	free(text);
	add_history(buf);
	break;
	}

	text[i - 1] = '\0';
	p += strlen(strcpy(p, text));
	free(text);
	n -= i;
	}
	#endif
	}

	if (!chopup_args(&arg, buf)) {
	BIO_printf(bio_err, "Can't parse (no memory?)\n");
	break;
	}

	ret = do_cmd(prog, arg.argc, arg.argv);
	if (ret == EXIT_THE_PROGRAM) {
	ret = 0;
	goto end;
	}
	if (ret != 0)
	BIO_printf(bio_err, "error in %s\n", arg.argv[0]);
	(void)BIO_flush(bio_out);
	(void)BIO_flush(bio_err);
	}
	ret = 1;
	end:
	OPENSSL_free(copied_argv);
	OPENSSL_free(default_config_file);
	lh_FUNCTION_free(prog);
	OPENSSL_free(arg.argv);

	BIO_free(bio_in);
	BIO_free_all(bio_out);
	apps_shutdown();
	#ifndef OPENSSL_NO_CRYPTO_MDEBUG
	if (CRYPTO_mem_leaks(bio_err) <= 0)
	ret = 1;
	#endif
	BIO_free(bio_err);
	EXIT(ret);
	}

	const OPTIONS exit_options[] = {
	{NULL}
	};

	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_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((BIO *)arg, "%s => %s\n", from, to);
	}
	}

	static void list_missing_help(void)
	{
	const FUNCTION *fp;
	const OPTIONS *o;

	for (fp = functions; fp->name != NULL; fp++) {
	if ((o = fp->help) == NULL) {
	BIO_printf(bio_out, "%s *\n", fp->name);
	continue;
	}
	for ( ; o->name != NULL; o++) {
	if (o->helpstr == NULL)
	BIO_printf(bio_out, "%s %s\n", fp->name, o->name);
	}
	}
	}


	/* Unified enum for help and list commands. */
	typedef enum HELPLIST_CHOICE {
	OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
	OPT_COMMANDS, OPT_DIGEST_COMMANDS,
	OPT_DIGEST_ALGORITHMS, OPT_CIPHER_COMMANDS, OPT_CIPHER_ALGORITHMS,
	OPT_PK_ALGORITHMS, OPT_DISABLED, OPT_MISSING_HELP
	} HELPLIST_CHOICE;

	const OPTIONS list_options[] = {
	{"help", OPT_HELP, '-', "Display this summary"},
	{"commands", OPT_COMMANDS, '-', "List of standard commands"},
	{"digest-commands", OPT_DIGEST_COMMANDS, '-',
	"List of message digest commands"},
	{"digest-algorithms", OPT_DIGEST_ALGORITHMS, '-',
	"List of message digest algorithms"},
	{"cipher-commands", OPT_CIPHER_COMMANDS, '-', "List of cipher commands"},
	{"cipher-algorithms", OPT_CIPHER_ALGORITHMS, '-',
	"List of cipher algorithms"},
	{"public-key-algorithms", OPT_PK_ALGORITHMS, '-',
	"List of public key algorithms"},
	{"disabled", OPT_DISABLED, '-',
	"List of disabled features"},
	{"missing-help", OPT_MISSING_HELP, '-',
	"List missing detailed help strings"},
	{NULL}
	};

	int list_main(int argc, char **argv)
	{
	char *prog;
	HELPLIST_CHOICE o;
	int done = 0;

	prog = opt_init(argc, argv, list_options);
	while ((o = opt_next()) != OPT_EOF) {
	switch (o) {
	case OPT_EOF: /* Never hit, but suppresses warning */
	case OPT_ERR:
	BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
	return 1;
	case OPT_HELP:
	opt_help(list_options);
	break;
	case OPT_COMMANDS:
	list_type(FT_general);
	break;
	case OPT_DIGEST_COMMANDS:
	list_type(FT_md);
	break;
	case OPT_DIGEST_ALGORITHMS:
	EVP_MD_do_all_sorted(list_md_fn, bio_out);
	break;
	case OPT_CIPHER_COMMANDS:
	list_type(FT_cipher);
	break;
	case OPT_CIPHER_ALGORITHMS:
	EVP_CIPHER_do_all_sorted(list_cipher_fn, bio_out);
	break;
	case OPT_PK_ALGORITHMS:
	list_pkey();
	break;
	case OPT_DISABLED:
	list_disabled();
	break;
	case OPT_MISSING_HELP:
	list_missing_help();
	break;
	}
	done = 1;
	}

	if (!done) {
	BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
	return 1;
	}

	return 0;
	}

	typedef enum HELP_CHOICE {
	OPT_hERR = -1, OPT_hEOF = 0, OPT_hHELP
	} HELP_CHOICE;

	const OPTIONS help_options[] = {
	{"help", OPT_hHELP, '-', "Display this summary"},
	{NULL}
	};


	int help_main(int argc, char **argv)
	{
	FUNCTION *fp;
	int i, nl;
	FUNC_TYPE tp;
	char *prog;
	HELP_CHOICE o;

	prog = opt_init(argc, argv, help_options);
	while ((o = opt_next()) != OPT_hEOF) {
	switch (o) {
	case OPT_hERR:
	case OPT_hEOF:
	BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
	return 1;
	case OPT_hHELP:
	opt_help(help_options);
	return 0;
	}
	}

	if (opt_num_rest() != 0) {
	BIO_printf(bio_err, "Usage: %s\n", prog);
	return 1;
	}

	BIO_printf(bio_err, "\nStandard commands");
	i = 0;
	tp = FT_none;
	for (fp = functions; fp->name != NULL; fp++) {
	nl = 0;
	if (((i++) % COLUMNS) == 0) {
	BIO_printf(bio_err, "\n");
	nl = 1;
	}
	if (fp->type != tp) {
	tp = fp->type;
	if (!nl)
	BIO_printf(bio_err, "\n");
	if (tp == FT_md) {
	i = 1;
	BIO_printf(bio_err,
	"\nMessage Digest commands (see the `dgst' command for more details)\n");
	} else if (tp == FT_cipher) {
	i = 1;
	BIO_printf(bio_err,
	"\nCipher commands (see the `enc' command for more details)\n");
	}
	}
	BIO_printf(bio_err, FORMAT, fp->name);
	}
	BIO_printf(bio_err, "\n\n");
	return 0;
	}

	int exit_main(int argc, char **argv)
	{
	return EXIT_THE_PROGRAM;
	}

	static void list_type(FUNC_TYPE ft)
	{
	FUNCTION *fp;
	int i = 0;

	for (fp = functions; fp->name != NULL; fp++)
	if (fp->type == ft) {
	if ((i++ % COLUMNS) == 0)
	BIO_printf(bio_out, "\n");
	BIO_printf(bio_out, FORMAT, fp->name);
	}
	BIO_printf(bio_out, "\n");
	}

	static int do_cmd(LHASH_OF(FUNCTION) prog, int argc, char argv[])
	{
	FUNCTION f, *fp;

	if (argc <= 0 \|\| argv[0] == NULL)
	return (0);
	f.name = argv[0];
	fp = lh_FUNCTION_retrieve(prog, &f);
	if (fp == NULL) {
	if (EVP_get_digestbyname(argv[0])) {
	f.type = FT_md;
	f.func = dgst_main;
	fp = &f;
	} else if (EVP_get_cipherbyname(argv[0])) {
	f.type = FT_cipher;
	f.func = enc_main;
	fp = &f;
	}
	}
	if (fp != NULL) {
	return (fp->func(argc, argv));
	}
	if ((strncmp(argv[0], "no-", 3)) == 0) {
	/*
	* User is asking if foo is unsupported, by trying to "run" the
	* no-foo command. Strange.
	*/
	f.name = argv[0] + 3;
	if (lh_FUNCTION_retrieve(prog, &f) == NULL) {
	BIO_printf(bio_out, "%s\n", argv[0]);
	return (0);
	}
	BIO_printf(bio_out, "%s\n", argv[0] + 3);
	return 1;
	}
	if (strcmp(argv[0], "quit") == 0 \|\| strcmp(argv[0], "q") == 0 \|\|
	strcmp(argv[0], "exit") == 0 \|\| strcmp(argv[0], "bye") == 0)
	/* Special value to mean "exit the program. */
	return EXIT_THE_PROGRAM;

	BIO_printf(bio_err, "Invalid command '%s'; type \"help\" for a list.\n",
	argv[0]);
	return (1);
	}

	static void list_pkey(void)
	{
	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(bio_out, "Name: %s\n", OBJ_nid2ln(pkey_id));
	BIO_printf(bio_out, "\tAlias for: %s\n",
	OBJ_nid2ln(pkey_base_id));
	} else {
	BIO_printf(bio_out, "Name: %s\n", pinfo);
	BIO_printf(bio_out, "\tType: %s Algorithm\n",
	pkey_flags & ASN1_PKEY_DYNAMIC ?
	"External" : "Builtin");
	BIO_printf(bio_out, "\tOID: %s\n", OBJ_nid2ln(pkey_id));
	if (pem_str == NULL)
	pem_str = "(none)";
	BIO_printf(bio_out, "\tPEM string: %s\n", pem_str);
	}

	}
	}

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

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

	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_disabled(void)
	{
	BIO_puts(bio_out, "Disabled algorithms:\n");
	#ifdef OPENSSL_NO_ARIA
	BIO_puts(bio_out, "ARIA\n");
	#endif
	#ifdef OPENSSL_NO_BF
	BIO_puts(bio_out, "BF\n");
	#endif
	#ifdef OPENSSL_NO_BLAKE2
	BIO_puts(bio_out, "BLAKE2\n");
	#endif
	#ifdef OPENSSL_NO_CAMELLIA
	BIO_puts(bio_out, "CAMELLIA\n");
	#endif
	#ifdef OPENSSL_NO_CAST
	BIO_puts(bio_out, "CAST\n");
	#endif
	#ifdef OPENSSL_NO_CMAC
	BIO_puts(bio_out, "CMAC\n");
	#endif
	#ifdef OPENSSL_NO_CMS
	BIO_puts(bio_out, "CMS\n");
	#endif
	#ifdef OPENSSL_NO_COMP
	BIO_puts(bio_out, "COMP\n");
	#endif
	#ifdef OPENSSL_NO_DES
	BIO_puts(bio_out, "DES\n");
	#endif
	#ifdef OPENSSL_NO_DGRAM
	BIO_puts(bio_out, "DGRAM\n");
	#endif
	#ifdef OPENSSL_NO_DH
	BIO_puts(bio_out, "DH\n");
	#endif
	#ifdef OPENSSL_NO_DSA
	BIO_puts(bio_out, "DSA\n");
	#endif
	#if defined(OPENSSL_NO_DTLS)
	BIO_puts(bio_out, "DTLS\n");
	#endif
	#if defined(OPENSSL_NO_DTLS1)
	BIO_puts(bio_out, "DTLS1\n");
	#endif
	#if defined(OPENSSL_NO_DTLS1_2)
	BIO_puts(bio_out, "DTLS1_2\n");
	#endif
	#ifdef OPENSSL_NO_EC
	BIO_puts(bio_out, "EC\n");
	#endif
	#ifdef OPENSSL_NO_EC2M
	BIO_puts(bio_out, "EC2M\n");
	#endif
	#ifdef OPENSSL_NO_ENGINE
	BIO_puts(bio_out, "ENGINE\n");
	#endif
	#ifdef OPENSSL_NO_GOST
	BIO_puts(bio_out, "GOST\n");
	#endif
	#ifdef OPENSSL_NO_HEARTBEATS
	BIO_puts(bio_out, "HEARTBEATS\n");
	#endif
	#ifdef OPENSSL_NO_IDEA
	BIO_puts(bio_out, "IDEA\n");
	#endif
	#ifdef OPENSSL_NO_MD2
	BIO_puts(bio_out, "MD2\n");
	#endif
	#ifdef OPENSSL_NO_MD4
	BIO_puts(bio_out, "MD4\n");
	#endif
	#ifdef OPENSSL_NO_MD5
	BIO_puts(bio_out, "MD5\n");
	#endif
	#ifdef OPENSSL_NO_MDC2
	BIO_puts(bio_out, "MDC2\n");
	#endif
	#ifdef OPENSSL_NO_OCB
	BIO_puts(bio_out, "OCB\n");
	#endif
	#ifdef OPENSSL_NO_OCSP
	BIO_puts(bio_out, "OCSP\n");
	#endif
	#ifdef OPENSSL_NO_PSK
	BIO_puts(bio_out, "PSK\n");
	#endif
	#ifdef OPENSSL_NO_RC2
	BIO_puts(bio_out, "RC2\n");
	#endif
	#ifdef OPENSSL_NO_RC4
	BIO_puts(bio_out, "RC4\n");
	#endif
	#ifdef OPENSSL_NO_RC5
	BIO_puts(bio_out, "RC5\n");
	#endif
	#ifdef OPENSSL_NO_RMD160
	BIO_puts(bio_out, "RMD160\n");
	#endif
	#ifdef OPENSSL_NO_RSA
	BIO_puts(bio_out, "RSA\n");
	#endif
	#ifdef OPENSSL_NO_SCRYPT
	BIO_puts(bio_out, "SCRYPT\n");
	#endif
	#ifdef OPENSSL_NO_SCTP
	BIO_puts(bio_out, "SCTP\n");
	#endif
	#ifdef OPENSSL_NO_SEED
	BIO_puts(bio_out, "SEED\n");
	#endif
	#ifdef OPENSSL_NO_SOCK
	BIO_puts(bio_out, "SOCK\n");
	#endif
	#ifdef OPENSSL_NO_SRP
	BIO_puts(bio_out, "SRP\n");
	#endif
	#ifdef OPENSSL_NO_SRTP
	BIO_puts(bio_out, "SRTP\n");
	#endif
	#ifdef OPENSSL_NO_SSL3
	BIO_puts(bio_out, "SSL3\n");
	#endif
	#ifdef OPENSSL_NO_TLS1
	BIO_puts(bio_out, "TLS1\n");
	#endif
	#ifdef OPENSSL_NO_TLS1_1
	BIO_puts(bio_out, "TLS1_1\n");
	#endif
	#ifdef OPENSSL_NO_TLS1_2
	BIO_puts(bio_out, "TLS1_2\n");
	#endif
	#ifdef OPENSSL_NO_WHIRLPOOL
	BIO_puts(bio_out, "WHIRLPOOL\n");
	#endif
	#ifndef ZLIB
	BIO_puts(bio_out, "ZLIB\n");
	#endif
	}

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

	/* Sort alphabetically within category. For nicer help displays. */
	for (i = 0, f = functions; f->name != NULL; ++f, ++i) ;
	qsort(functions, i, sizeof(*functions), SortFnByName);

	if ((ret = lh_FUNCTION_new(function_hash, function_cmp)) == NULL)
	return (NULL);

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