681 lines
17 KiB
C
681 lines
17 KiB
C
/* apps/enc.c */
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/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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* All rights reserved.
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*
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* This package is an SSL implementation written
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* by Eric Young (eay@cryptsoft.com).
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* The implementation was written so as to conform with Netscapes SSL.
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*
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* This library is free for commercial and non-commercial use as long as
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* the following conditions are aheared to. The following conditions
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* apply to all code found in this distribution, be it the RC4, RSA,
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* lhash, DES, etc., code; not just the SSL code. The SSL documentation
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* included with this distribution is covered by the same copyright terms
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* except that the holder is Tim Hudson (tjh@cryptsoft.com).
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*
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* Copyright remains Eric Young's, and as such any Copyright notices in
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* the code are not to be removed.
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* If this package is used in a product, Eric Young should be given attribution
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* as the author of the parts of the library used.
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* This can be in the form of a textual message at program startup or
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* in documentation (online or textual) provided with the package.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* "This product includes cryptographic software written by
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* Eric Young (eay@cryptsoft.com)"
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* The word 'cryptographic' can be left out if the rouines from the library
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* being used are not cryptographic related :-).
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* 4. If you include any Windows specific code (or a derivative thereof) from
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* the apps directory (application code) you must include an acknowledgement:
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* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
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*
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* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* The licence and distribution terms for any publically available version or
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* derivative of this code cannot be changed. i.e. this code cannot simply be
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* copied and put under another distribution licence
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* [including the GNU Public Licence.]
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "apps.h"
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#include <openssl/bio.h>
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#include <openssl/err.h>
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#include <openssl/evp.h>
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#include <openssl/objects.h>
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#include <openssl/x509.h>
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#include <openssl/rand.h>
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#include <openssl/pem.h>
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#include <ctype.h>
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int set_hex(char *in,unsigned char *out,int size);
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#undef SIZE
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#undef BSIZE
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#undef PROG
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#define SIZE (512)
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#define BSIZE (8*1024)
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#define PROG enc_main
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static void show_ciphers(const OBJ_NAME *name,void *bio_)
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{
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BIO *bio=bio_;
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static int n;
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if(!islower((unsigned char)*name->name))
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return;
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BIO_printf(bio,"-%-25s",name->name);
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if(++n == 3)
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{
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BIO_printf(bio,"\n");
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n=0;
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}
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else
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BIO_printf(bio," ");
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}
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int MAIN(int, char **);
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int MAIN(int argc, char **argv)
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{
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#ifndef OPENSSL_NO_ENGINE
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ENGINE *e = NULL;
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#endif
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static const char magic[]="Salted__";
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char mbuf[sizeof magic-1];
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char *strbuf=NULL;
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unsigned char *buff=NULL,*bufsize=NULL;
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int bsize=BSIZE,verbose=0;
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int ret=1,inl;
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int nopad = 0;
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unsigned char key[EVP_MAX_KEY_LENGTH],iv[EVP_MAX_IV_LENGTH];
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unsigned char salt[PKCS5_SALT_LEN];
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char *str=NULL, *passarg = NULL, *pass = NULL;
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char *hkey=NULL,*hiv=NULL,*hsalt = NULL;
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char *md=NULL;
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int enc=1,printkey=0,i,base64=0;
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int debug=0,olb64=0,nosalt=0;
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const EVP_CIPHER *cipher=NULL,*c;
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EVP_CIPHER_CTX *ctx = NULL;
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char *inf=NULL,*outf=NULL;
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BIO *in=NULL,*out=NULL,*b64=NULL,*benc=NULL,*rbio=NULL,*wbio=NULL;
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#define PROG_NAME_SIZE 39
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char pname[PROG_NAME_SIZE+1];
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#ifndef OPENSSL_NO_ENGINE
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char *engine = NULL;
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#endif
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const EVP_MD *dgst=NULL;
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apps_startup();
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if (bio_err == NULL)
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if ((bio_err=BIO_new(BIO_s_file())) != NULL)
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BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);
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if (!load_config(bio_err, NULL))
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goto end;
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/* first check the program name */
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program_name(argv[0],pname,sizeof pname);
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if (strcmp(pname,"base64") == 0)
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base64=1;
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cipher=EVP_get_cipherbyname(pname);
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if (!base64 && (cipher == NULL) && (strcmp(pname,"enc") != 0))
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{
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BIO_printf(bio_err,"%s is an unknown cipher\n",pname);
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goto bad;
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}
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argc--;
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argv++;
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while (argc >= 1)
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{
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if (strcmp(*argv,"-e") == 0)
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enc=1;
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else if (strcmp(*argv,"-in") == 0)
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{
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if (--argc < 1) goto bad;
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inf= *(++argv);
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}
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else if (strcmp(*argv,"-out") == 0)
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{
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if (--argc < 1) goto bad;
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outf= *(++argv);
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}
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else if (strcmp(*argv,"-pass") == 0)
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{
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if (--argc < 1) goto bad;
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passarg= *(++argv);
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}
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#ifndef OPENSSL_NO_ENGINE
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else if (strcmp(*argv,"-engine") == 0)
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{
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if (--argc < 1) goto bad;
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engine= *(++argv);
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}
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#endif
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else if (strcmp(*argv,"-d") == 0)
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enc=0;
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else if (strcmp(*argv,"-p") == 0)
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printkey=1;
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else if (strcmp(*argv,"-v") == 0)
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verbose=1;
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else if (strcmp(*argv,"-nopad") == 0)
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nopad=1;
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else if (strcmp(*argv,"-salt") == 0)
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nosalt=0;
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else if (strcmp(*argv,"-nosalt") == 0)
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nosalt=1;
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else if (strcmp(*argv,"-debug") == 0)
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debug=1;
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else if (strcmp(*argv,"-P") == 0)
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printkey=2;
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else if (strcmp(*argv,"-A") == 0)
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olb64=1;
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else if (strcmp(*argv,"-a") == 0)
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base64=1;
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else if (strcmp(*argv,"-base64") == 0)
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base64=1;
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else if (strcmp(*argv,"-bufsize") == 0)
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{
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if (--argc < 1) goto bad;
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bufsize=(unsigned char *)*(++argv);
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}
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else if (strcmp(*argv,"-k") == 0)
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{
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if (--argc < 1) goto bad;
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str= *(++argv);
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}
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else if (strcmp(*argv,"-kfile") == 0)
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{
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static char buf[128];
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FILE *infile;
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char *file;
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if (--argc < 1) goto bad;
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file= *(++argv);
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infile=fopen(file,"r");
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if (infile == NULL)
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{
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BIO_printf(bio_err,"unable to read key from '%s'\n",
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file);
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goto bad;
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}
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buf[0]='\0';
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fgets(buf,sizeof buf,infile);
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fclose(infile);
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i=strlen(buf);
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if ((i > 0) &&
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((buf[i-1] == '\n') || (buf[i-1] == '\r')))
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buf[--i]='\0';
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if ((i > 0) &&
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((buf[i-1] == '\n') || (buf[i-1] == '\r')))
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buf[--i]='\0';
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if (i < 1)
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{
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BIO_printf(bio_err,"zero length password\n");
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goto bad;
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}
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str=buf;
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}
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else if (strcmp(*argv,"-K") == 0)
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{
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if (--argc < 1) goto bad;
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hkey= *(++argv);
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}
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else if (strcmp(*argv,"-S") == 0)
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{
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if (--argc < 1) goto bad;
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hsalt= *(++argv);
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}
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else if (strcmp(*argv,"-iv") == 0)
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{
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if (--argc < 1) goto bad;
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hiv= *(++argv);
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}
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else if (strcmp(*argv,"-md") == 0)
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{
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if (--argc < 1) goto bad;
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md= *(++argv);
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}
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else if ((argv[0][0] == '-') &&
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((c=EVP_get_cipherbyname(&(argv[0][1]))) != NULL))
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{
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cipher=c;
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}
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else if (strcmp(*argv,"-none") == 0)
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cipher=NULL;
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else
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{
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BIO_printf(bio_err,"unknown option '%s'\n",*argv);
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bad:
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BIO_printf(bio_err,"options are\n");
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BIO_printf(bio_err,"%-14s input file\n","-in <file>");
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BIO_printf(bio_err,"%-14s output file\n","-out <file>");
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BIO_printf(bio_err,"%-14s pass phrase source\n","-pass <arg>");
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BIO_printf(bio_err,"%-14s encrypt\n","-e");
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BIO_printf(bio_err,"%-14s decrypt\n","-d");
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BIO_printf(bio_err,"%-14s base64 encode/decode, depending on encryption flag\n","-a/-base64");
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BIO_printf(bio_err,"%-14s passphrase is the next argument\n","-k");
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BIO_printf(bio_err,"%-14s passphrase is the first line of the file argument\n","-kfile");
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BIO_printf(bio_err,"%-14s the next argument is the md to use to create a key\n","-md");
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BIO_printf(bio_err,"%-14s from a passphrase. One of md2, md5, sha or sha1\n","");
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BIO_printf(bio_err,"%-14s key/iv in hex is the next argument\n","-K/-iv");
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BIO_printf(bio_err,"%-14s print the iv/key (then exit if -P)\n","-[pP]");
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BIO_printf(bio_err,"%-14s buffer size\n","-bufsize <n>");
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#ifndef OPENSSL_NO_ENGINE
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BIO_printf(bio_err,"%-14s use engine e, possibly a hardware device.\n","-engine e");
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#endif
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BIO_printf(bio_err,"Cipher Types\n");
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OBJ_NAME_do_all_sorted(OBJ_NAME_TYPE_CIPHER_METH,
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show_ciphers,
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bio_err);
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BIO_printf(bio_err,"\n");
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goto end;
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}
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argc--;
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argv++;
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}
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#ifndef OPENSSL_NO_ENGINE
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e = setup_engine(bio_err, engine, 0);
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#endif
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if (md && (dgst=EVP_get_digestbyname(md)) == NULL)
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{
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BIO_printf(bio_err,"%s is an unsupported message digest type\n",md);
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goto end;
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}
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if (dgst == NULL)
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{
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dgst = EVP_md5();
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}
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if (bufsize != NULL)
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{
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unsigned long n;
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for (n=0; *bufsize; bufsize++)
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{
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i= *bufsize;
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if ((i <= '9') && (i >= '0'))
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n=n*10+i-'0';
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else if (i == 'k')
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{
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n*=1024;
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bufsize++;
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break;
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}
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}
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if (*bufsize != '\0')
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{
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BIO_printf(bio_err,"invalid 'bufsize' specified.\n");
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goto end;
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}
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/* It must be large enough for a base64 encoded line */
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if (base64 && n < 80) n=80;
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bsize=(int)n;
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if (verbose) BIO_printf(bio_err,"bufsize=%d\n",bsize);
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}
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strbuf=OPENSSL_malloc(SIZE);
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buff=(unsigned char *)OPENSSL_malloc(EVP_ENCODE_LENGTH(bsize));
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if ((buff == NULL) || (strbuf == NULL))
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{
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BIO_printf(bio_err,"OPENSSL_malloc failure %ld\n",(long)EVP_ENCODE_LENGTH(bsize));
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goto end;
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}
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in=BIO_new(BIO_s_file());
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out=BIO_new(BIO_s_file());
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if ((in == NULL) || (out == NULL))
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{
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ERR_print_errors(bio_err);
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goto end;
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}
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if (debug)
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{
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BIO_set_callback(in,BIO_debug_callback);
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BIO_set_callback(out,BIO_debug_callback);
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BIO_set_callback_arg(in,bio_err);
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BIO_set_callback_arg(out,bio_err);
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}
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if (inf == NULL)
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{
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if (bufsize != NULL)
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setvbuf(stdin, (char *)NULL, _IONBF, 0);
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BIO_set_fp(in,stdin,BIO_NOCLOSE);
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}
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else
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{
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if (BIO_read_filename(in,inf) <= 0)
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{
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perror(inf);
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goto end;
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}
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}
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if(!str && passarg) {
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if(!app_passwd(bio_err, passarg, NULL, &pass, NULL)) {
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BIO_printf(bio_err, "Error getting password\n");
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goto end;
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}
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str = pass;
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}
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if ((str == NULL) && (cipher != NULL) && (hkey == NULL))
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{
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for (;;)
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{
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char buf[200];
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BIO_snprintf(buf,sizeof buf,"enter %s %s password:",
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OBJ_nid2ln(EVP_CIPHER_nid(cipher)),
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(enc)?"encryption":"decryption");
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strbuf[0]='\0';
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i=EVP_read_pw_string((char *)strbuf,SIZE,buf,enc);
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if (i == 0)
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{
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if (strbuf[0] == '\0')
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{
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ret=1;
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goto end;
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}
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str=strbuf;
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break;
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}
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if (i < 0)
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{
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BIO_printf(bio_err,"bad password read\n");
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goto end;
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}
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}
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}
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if (outf == NULL)
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{
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BIO_set_fp(out,stdout,BIO_NOCLOSE);
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if (bufsize != NULL)
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setvbuf(stdout, (char *)NULL, _IONBF, 0);
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#ifdef OPENSSL_SYS_VMS
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{
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BIO *tmpbio = BIO_new(BIO_f_linebuffer());
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out = BIO_push(tmpbio, out);
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}
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#endif
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}
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else
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{
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if (BIO_write_filename(out,outf) <= 0)
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{
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perror(outf);
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goto end;
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}
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}
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rbio=in;
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wbio=out;
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if (base64)
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{
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if ((b64=BIO_new(BIO_f_base64())) == NULL)
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goto end;
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if (debug)
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{
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BIO_set_callback(b64,BIO_debug_callback);
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BIO_set_callback_arg(b64,bio_err);
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}
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if (olb64)
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BIO_set_flags(b64,BIO_FLAGS_BASE64_NO_NL);
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if (enc)
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wbio=BIO_push(b64,wbio);
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else
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rbio=BIO_push(b64,rbio);
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}
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if (cipher != NULL)
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{
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/* Note that str is NULL if a key was passed on the command
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* line, so we get no salt in that case. Is this a bug?
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*/
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if (str != NULL)
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{
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/* Salt handling: if encrypting generate a salt and
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* write to output BIO. If decrypting read salt from
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* input BIO.
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*/
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unsigned char *sptr;
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if(nosalt) sptr = NULL;
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else {
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if(enc) {
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if(hsalt) {
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if(!set_hex(hsalt,salt,sizeof salt)) {
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BIO_printf(bio_err,
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"invalid hex salt value\n");
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goto end;
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}
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} else if (RAND_pseudo_bytes(salt, sizeof salt) < 0)
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goto end;
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/* If -P option then don't bother writing */
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if((printkey != 2)
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&& (BIO_write(wbio,magic,
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sizeof magic-1) != sizeof magic-1
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|| BIO_write(wbio,
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(char *)salt,
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sizeof salt) != sizeof salt)) {
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BIO_printf(bio_err,"error writing output file\n");
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goto end;
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}
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} else if(BIO_read(rbio,mbuf,sizeof mbuf) != sizeof mbuf
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|| BIO_read(rbio,
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(unsigned char *)salt,
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sizeof salt) != sizeof salt) {
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BIO_printf(bio_err,"error reading input file\n");
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goto end;
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} else if(memcmp(mbuf,magic,sizeof magic-1)) {
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BIO_printf(bio_err,"bad magic number\n");
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goto end;
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}
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sptr = salt;
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}
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EVP_BytesToKey(cipher,dgst,sptr,
|
|
(unsigned char *)str,
|
|
strlen(str),1,key,iv);
|
|
/* zero the complete buffer or the string
|
|
* passed from the command line
|
|
* bug picked up by
|
|
* Larry J. Hughes Jr. <hughes@indiana.edu> */
|
|
if (str == strbuf)
|
|
OPENSSL_cleanse(str,SIZE);
|
|
else
|
|
OPENSSL_cleanse(str,strlen(str));
|
|
}
|
|
if ((hiv != NULL) && !set_hex(hiv,iv,sizeof iv))
|
|
{
|
|
BIO_printf(bio_err,"invalid hex iv value\n");
|
|
goto end;
|
|
}
|
|
if ((hiv == NULL) && (str == NULL))
|
|
{
|
|
/* No IV was explicitly set and no IV was generated
|
|
* during EVP_BytesToKey. Hence the IV is undefined,
|
|
* making correct decryption impossible. */
|
|
BIO_printf(bio_err, "iv undefined\n");
|
|
goto end;
|
|
}
|
|
if ((hkey != NULL) && !set_hex(hkey,key,sizeof key))
|
|
{
|
|
BIO_printf(bio_err,"invalid hex key value\n");
|
|
goto end;
|
|
}
|
|
|
|
if ((benc=BIO_new(BIO_f_cipher())) == NULL)
|
|
goto end;
|
|
|
|
/* Since we may be changing parameters work on the encryption
|
|
* context rather than calling BIO_set_cipher().
|
|
*/
|
|
|
|
BIO_get_cipher_ctx(benc, &ctx);
|
|
if (!EVP_CipherInit_ex(ctx, cipher, NULL, NULL, NULL, enc))
|
|
{
|
|
BIO_printf(bio_err, "Error setting cipher %s\n",
|
|
EVP_CIPHER_name(cipher));
|
|
ERR_print_errors(bio_err);
|
|
goto end;
|
|
}
|
|
|
|
if (nopad)
|
|
EVP_CIPHER_CTX_set_padding(ctx, 0);
|
|
|
|
if (!EVP_CipherInit_ex(ctx, NULL, NULL, key, iv, enc))
|
|
{
|
|
BIO_printf(bio_err, "Error setting cipher %s\n",
|
|
EVP_CIPHER_name(cipher));
|
|
ERR_print_errors(bio_err);
|
|
goto end;
|
|
}
|
|
|
|
if (debug)
|
|
{
|
|
BIO_set_callback(benc,BIO_debug_callback);
|
|
BIO_set_callback_arg(benc,bio_err);
|
|
}
|
|
|
|
if (printkey)
|
|
{
|
|
if (!nosalt)
|
|
{
|
|
printf("salt=");
|
|
for (i=0; i<(int)sizeof(salt); i++)
|
|
printf("%02X",salt[i]);
|
|
printf("\n");
|
|
}
|
|
if (cipher->key_len > 0)
|
|
{
|
|
printf("key=");
|
|
for (i=0; i<cipher->key_len; i++)
|
|
printf("%02X",key[i]);
|
|
printf("\n");
|
|
}
|
|
if (cipher->iv_len > 0)
|
|
{
|
|
printf("iv =");
|
|
for (i=0; i<cipher->iv_len; i++)
|
|
printf("%02X",iv[i]);
|
|
printf("\n");
|
|
}
|
|
if (printkey == 2)
|
|
{
|
|
ret=0;
|
|
goto end;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Only encrypt/decrypt as we write the file */
|
|
if (benc != NULL)
|
|
wbio=BIO_push(benc,wbio);
|
|
|
|
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;
|
|
}
|
|
}
|
|
if (!BIO_flush(wbio))
|
|
{
|
|
BIO_printf(bio_err,"bad decrypt\n");
|
|
goto end;
|
|
}
|
|
|
|
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:
|
|
ERR_print_errors(bio_err);
|
|
if (strbuf != NULL) OPENSSL_free(strbuf);
|
|
if (buff != NULL) OPENSSL_free(buff);
|
|
if (in != NULL) BIO_free(in);
|
|
if (out != NULL) BIO_free_all(out);
|
|
if (benc != NULL) BIO_free(benc);
|
|
if (b64 != NULL) BIO_free(b64);
|
|
if(pass) OPENSSL_free(pass);
|
|
apps_shutdown();
|
|
OPENSSL_EXIT(ret);
|
|
}
|
|
|
|
int set_hex(char *in, unsigned char *out, int size)
|
|
{
|
|
int i,n;
|
|
unsigned char j;
|
|
|
|
n=strlen(in);
|
|
if (n > (size*2))
|
|
{
|
|
BIO_printf(bio_err,"hex string is too long\n");
|
|
return(0);
|
|
}
|
|
memset(out,0,size);
|
|
for (i=0; i<n; i++)
|
|
{
|
|
j=(unsigned char)*in;
|
|
*(in++)='\0';
|
|
if (j == 0) break;
|
|
if ((j >= '0') && (j <= '9'))
|
|
j-='0';
|
|
else if ((j >= 'A') && (j <= 'F'))
|
|
j=j-'A'+10;
|
|
else if ((j >= 'a') && (j <= 'f'))
|
|
j=j-'a'+10;
|
|
else
|
|
{
|
|
BIO_printf(bio_err,"non-hex digit\n");
|
|
return(0);
|
|
}
|
|
if (i&1)
|
|
out[i/2]|=j;
|
|
else
|
|
out[i/2]=(j<<4);
|
|
}
|
|
return(1);
|
|
}
|