b64.c

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/* demos/b64.c */
/* Copyright (C) 1995-1998 Eric Young ([email protected])
 * All rights reserved.
 *
 * This package is an SSL implementation written
 * by Eric Young ([email protected]).
 * 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 ([email protected]).
 * 
 * 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 ([email protected])"
 *    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 ([email protected])"
 * 
 * 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.]
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "../apps/apps.h"
#include <openssl/buffer.h>
#include <openssl/err.h>
#include <openssl/evp.h>
#include <openssl/objects.h>
#include <openssl/x509.h>
#include <openssl/pem.h>

#undef SIZE
#undef BSIZE
#undef PROG

#define SIZE    (512)
#define BSIZE   (8*1024)
#define PROG    enc_main

int main(argc,argv)
int argc;
char **argv;
    {
    char *strbuf=NULL;
    unsigned char *buff=NULL,*bufsize=NULL;
    int bsize=BSIZE,verbose=0;
    int ret=1,inl;
    char *str=NULL;
    char *hkey=NULL,*hiv=NULL;
    int enc=1,printkey=0,i,base64=0;
    int debug=0;
    EVP_CIPHER *cipher=NULL,*c;
    char *inf=NULL,*outf=NULL;
    BIO *in=NULL,*out=NULL,*b64=NULL,*benc=NULL,*rbio=NULL,*wbio=NULL;
#define PROG_NAME_SIZE  39


    apps_startup();

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

    base64=1;

    argc--;
    argv++;
    while (argc >= 1)
        {
        if  (strcmp(*argv,"-e") == 0)
            enc=1;
        if (strcmp(*argv,"-in") == 0)
            {
            if (--argc < 1) goto bad;
            inf= *(++argv);
            }
        else if (strcmp(*argv,"-out") == 0)
            {
            if (--argc < 1) goto bad;
            outf= *(++argv);
            }
        else if (strcmp(*argv,"-d") == 0)
            enc=0;
        else if (strcmp(*argv,"-v") == 0)
            verbose=1;
        else if (strcmp(*argv,"-debug") == 0)
            debug=1;
        else if (strcmp(*argv,"-bufsize") == 0)
            {
            if (--argc < 1) goto bad;
            bufsize=(unsigned char *)*(++argv);
            }
        else
            {
            BIO_printf(bio_err,"unknown option '%s'\n",*argv);
bad:
            BIO_printf(bio_err,"options are\n");
            BIO_printf(bio_err,"%-14s input file\n","-in <file>");
            BIO_printf(bio_err,"%-14s output file\n","-out <file>");
            BIO_printf(bio_err,"%-14s encode\n","-e");
            BIO_printf(bio_err,"%-14s decode\n","-d");
            BIO_printf(bio_err,"%-14s buffer size\n","-bufsize <n>");

            goto end;
            }
        argc--;
        argv++;
        }

    if (bufsize != NULL)
        {
        int i;
        unsigned long n;

        for (n=0; *bufsize; bufsize++)
            {
            i= *bufsize;
            if ((i <= '9') && (i >= '0'))
                n=n*10+i-'0';
            else if (i == 'k')
                {
                n*=1024;
                bufsize++;
                break;
                }
            }
        if (*bufsize != '\0')
            {
            BIO_printf(bio_err,"invalid 'bufsize' specified.\n");
            goto end;
            }

        /* It must be large enough for a base64 encoded line */
        if (n < 80) n=80;

        bsize=(int)n;
        if (verbose) BIO_printf(bio_err,"bufsize=%d\n",bsize);
        }

    strbuf=OPENSSL_malloc(SIZE);
    buff=(unsigned char *)OPENSSL_malloc(EVP_ENCODE_LENGTH(bsize));
    if ((buff == NULL) || (strbuf == NULL))
        {
        BIO_printf(bio_err,"OPENSSL_malloc failure\n");
        goto end;
        }

    in=BIO_new(BIO_s_file());
    out=BIO_new(BIO_s_file());
    if ((in == NULL) || (out == NULL))
        {
        ERR_print_errors(bio_err);
        goto end;
        }
    if (debug)
        {
        BIO_set_callback(in,BIO_debug_callback);
        BIO_set_callback(out,BIO_debug_callback);
        BIO_set_callback_arg(in,bio_err);
        BIO_set_callback_arg(out,bio_err);
        }

    if (inf == NULL)
        BIO_set_fp(in,stdin,BIO_NOCLOSE);
    else
        {
        if (BIO_read_filename(in,inf) <= 0)
            {
            perror(inf);
            goto end;
            }
        }

    if (outf == NULL)
        BIO_set_fp(out,stdout,BIO_NOCLOSE);
    else
        {
        if (BIO_write_filename(out,outf) <= 0)
            {
            perror(outf);
            goto end;
            }
        }

    rbio=in;
    wbio=out;

    if (base64)
        {
        if ((b64=BIO_new(BIO_f_base64())) == NULL)
            goto end;
        if (debug)
            {
            BIO_set_callback(b64,BIO_debug_callback);
            BIO_set_callback_arg(b64,bio_err);
            }
        if (enc)
            wbio=BIO_push(b64,wbio);
        else
            rbio=BIO_push(b64,rbio);
        }

    for (;;)
        {
        inl=BIO_read(rbio,(char *)buff,bsize);
        if (inl <= 0) break;
        if (BIO_write(wbio,(char *)buff,inl) != inl)
            {
            BIO_printf(bio_err,"error writing output file\n");
            goto end;
            }
        }
    BIO_flush(wbio);

    ret=0;
    if (verbose)
        {
        BIO_printf(bio_err,"bytes read   :%8ld\n",BIO_number_read(in));
        BIO_printf(bio_err,"bytes written:%8ld\n",BIO_number_written(out));
        }
end:
    if (strbuf != NULL) OPENSSL_free(strbuf);
    if (buff != NULL) OPENSSL_free(buff);
    if (in != NULL) BIO_free(in);
    if (out != NULL) BIO_free(out);
    if (benc != NULL) BIO_free(benc);
    if (b64 != NULL) BIO_free(b64);
    EXIT(ret);
    }