fix out-of-bounds check in lock_dbg_cb (was too lose to detect all

[thirdparty/openssl.git] / apps / openssl.c

/* apps/openssl.c */
/* 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) 1998-2001 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 <stdio.h>
#include <string.h>
#include <stdlib.h>
#define OPENSSL_C /* tells apps.h to use complete apps_startup() */
#include "apps.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
#define USE_SOCKETS /* needed for the _O_BINARY defs in the MS world */
#include "progs.h"
#include "s_apps.h"
#include <openssl/err.h>

/* 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 unsigned long MS_CALLBACK hash(FUNCTION *a); */
static unsigned long MS_CALLBACK hash(const void *a_void);
/* static int MS_CALLBACK cmp(FUNCTION *a,FUNCTION *b); */
static int MS_CALLBACK cmp(const void *a_void,const void *b_void);
static LHASH *prog_init(void );
static int do_cmd(LHASH *prog,int argc,char *argv[]);
char *default_config_file=NULL;

/* Make sure there is only one when MONOLITH is defined */
#ifdef MONOLITH
CONF *config=NULL;
BIO *bio_err=NULL;
#endif


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);
                }
        }


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

        if (bio_err == NULL)
                if ((bio_err=BIO_new(BIO_s_file())) != NULL)
                        BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);

        if (getenv("OPENSSL_DEBUG_MEMORY") != NULL) /* if not defined, use compiled-in library defaults */
                {
                if (!(0 == strcmp(getenv("OPENSSL_DEBUG_MEMORY"), "off")))
                        {
                        CRYPTO_malloc_debug_init();
                        CRYPTO_set_mem_debug_options(V_CRYPTO_MDEBUG_ALL);
                        }
                else
                        {
                        /* OPENSSL_DEBUG_MEMORY=off */
                        CRYPTO_set_mem_debug_functions(0, 0, 0, 0, 0);
                        }
                }
        CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ON);

#if 0
        if (getenv("OPENSSL_DEBUG_LOCKING") != NULL)
#endif
                {
                CRYPTO_set_locking_callback(lock_dbg_cb);
                }

        apps_startup();

        /* Lets load up our environment a little */
        p=getenv("OPENSSL_CONF");
        if (p == NULL)
                p=getenv("SSLEAY_CONF");
        if (p == NULL)
                p=to_free=make_config_name();

        default_config_file=p;

        config=NCONF_new(NULL);
        i=NCONF_load(config,p,&errline);
        if (i == 0)
                {
                NCONF_free(config);
                config = NULL;
                ERR_clear_error();
                }

        prog=prog_init();

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

        f.name=pname;
        fp=(FUNCTION *)lh_retrieve(prog,&f);
        if (fp != NULL)
                {
                Argv[0]=pname;
                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++;
                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);
                        fgets(p,n,stdin);
                        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:
        if (to_free)
                OPENSSL_free(to_free);
        if (config != NULL)
                {
                NCONF_free(config);
                config=NULL;
                }
        if (prog != NULL) lh_free(prog);
        if (arg.data != NULL) OPENSSL_free(arg.data);

        apps_shutdown();

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

#define LIST_STANDARD_COMMANDS "list-standard-commands"
#define LIST_MESSAGE_DIGEST_COMMANDS "list-message-digest-commands"
#define LIST_CIPHER_COMMANDS "list-cipher-commands"

static int do_cmd(LHASH *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=(FUNCTION *)lh_retrieve(prog,&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);
#ifdef OPENSSL_SYS_VMS
                {
                BIO *tmpbio = BIO_new(BIO_f_linebuffer());
                bio_stdout = BIO_push(tmpbio, bio_stdout);
                }
#endif
                f.name=argv[0]+3;
                ret = (lh_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_CIPHER_COMMANDS) == 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 /* strcmp(argv[0],LIST_CIPHER_COMMANDS) == 0 */
                        list_type = FUNC_TYPE_CIPHER;
                bio_stdout = BIO_new_fp(stdout,BIO_NOCLOSE);
#ifdef OPENSSL_SYS_VMS
                {
                BIO *tmpbio = BIO_new(BIO_f_linebuffer());
                bio_stdout = BIO_push(tmpbio, bio_stdout);
                }
#endif
                
                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;
                        if (((i++) % 5) == 0)
                                {
                                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");
                                        }
                                }
                        BIO_printf(bio_err,"%-15s",fp->name);
                        }
                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 LHASH *prog_init(void)
        {
        LHASH *ret;
        FUNCTION *f;
        int 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_new(hash, cmp)) == NULL)
                return(NULL);

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

/* static int MS_CALLBACK cmp(FUNCTION *a, FUNCTION *b) */
static int MS_CALLBACK cmp(const void *a_void, const void *b_void)
        {
        return(strncmp(((FUNCTION *)a_void)->name,
                        ((FUNCTION *)b_void)->name,8));
        }

/* static unsigned long MS_CALLBACK hash(FUNCTION *a) */
static unsigned long MS_CALLBACK hash(const void *a_void)
        {
        return(lh_strhash(((FUNCTION *)a_void)->name));
        }