apps/enc.c - platform/external/openssl - Git at Google

 /* apps/enc.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.]
  */

 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include "apps.h"
 #include <openssl/bio.h>
 #include <openssl/err.h>
 #include <openssl/evp.h>
 #include <openssl/objects.h>
 #include <openssl/x509.h>
 #include <openssl/rand.h>
 #include <openssl/pem.h>
 #include <openssl/comp.h>
 #include <ctype.h>

 int set_hex(char *in,unsigned char *out,int size);
 #undef SIZE
 #undef BSIZE
 #undef PROG

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

 static void show_ciphers(const OBJ_NAME *name,void *bio_)
 	{
 	BIO *bio=bio_;
 	static int n;

 	if(!islower((unsigned char)*name->name))
 		return;

 	BIO_printf(bio,"-%-25s",name->name);
 	if(++n == 3)
 		{
 		BIO_printf(bio,"\n");
 		n=0;
 		}
 	else
 		BIO_printf(bio," ");
 	}

 int MAIN(int, char **);

 int MAIN(int argc, char **argv)
 	{
 	static const char magic[]="Salted__";
 	char mbuf[sizeof magic-1];
 	char *strbuf=NULL;
 	unsigned char *buff=NULL,*bufsize=NULL;
 	int bsize=BSIZE,verbose=0;
 	int ret=1,inl;
 	int nopad = 0;
 	unsigned char key[EVP_MAX_KEY_LENGTH],iv[EVP_MAX_IV_LENGTH];
 	unsigned char salt[PKCS5_SALT_LEN];
 	char *str=NULL, *passarg = NULL, *pass = NULL;
 	char *hkey=NULL,*hiv=NULL,*hsalt = NULL;
 	char *md=NULL;
 	int enc=1,printkey=0,i,base64=0;
 #ifdef ZLIB
 	int do_zlib=0;
 	BIO *bzl = NULL;
 #endif
 	int debug=0,olb64=0,nosalt=0;
 	const EVP_CIPHER *cipher=NULL,*c;
 	EVP_CIPHER_CTX *ctx = NULL;
 	char *inf=NULL,*outf=NULL;
 	BIO *in=NULL,*out=NULL,*b64=NULL,*benc=NULL,*rbio=NULL,*wbio=NULL;
 #define PROG_NAME_SIZE  39
 	char pname[PROG_NAME_SIZE+1];
 #ifndef OPENSSL_NO_ENGINE
 	char *engine = NULL;
 #endif
 	const EVP_MD *dgst=NULL;

 	apps_startup();

 	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 (!load_config(bio_err, NULL))
 		goto end;

 	/* first check the program name */
 	program_name(argv[0],pname,sizeof pname);
 	if (strcmp(pname,"base64") == 0)
 		base64=1;
 #ifdef ZLIB
 	if (strcmp(pname,"zlib") == 0)
 		do_zlib=1;
 #endif

 	cipher=EVP_get_cipherbyname(pname);
 #ifdef ZLIB
 	if (!do_zlib && !base64 && (cipher == NULL)
 				&& (strcmp(pname,"enc") != 0))
 #else
 	if (!base64 && (cipher == NULL) && (strcmp(pname,"enc") != 0))
 #endif
 		{
 		BIO_printf(bio_err,"%s is an unknown cipher\n",pname);
 		goto bad;
 		}

 	argc--;
 	argv++;
 	while (argc >= 1)
 		{
 		if	(strcmp(*argv,"-e") == 0)
 			enc=1;
 		else 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,"-pass") == 0)
 			{
 			if (--argc < 1) goto bad;
 			passarg= *(++argv);
 			}
 #ifndef OPENSSL_NO_ENGINE
 		else if (strcmp(*argv,"-engine") == 0)
 			{
 			if (--argc < 1) goto bad;
 			engine= *(++argv);
 			}
 #endif
 		else if	(strcmp(*argv,"-d") == 0)
 			enc=0;
 		else if	(strcmp(*argv,"-p") == 0)
 			printkey=1;
 		else if	(strcmp(*argv,"-v") == 0)
 			verbose=1;
 		else if	(strcmp(*argv,"-nopad") == 0)
 			nopad=1;
 		else if	(strcmp(*argv,"-salt") == 0)
 			nosalt=0;
 		else if	(strcmp(*argv,"-nosalt") == 0)
 			nosalt=1;
 		else if	(strcmp(*argv,"-debug") == 0)
 			debug=1;
 		else if	(strcmp(*argv,"-P") == 0)
 			printkey=2;
 		else if	(strcmp(*argv,"-A") == 0)
 			olb64=1;
 		else if	(strcmp(*argv,"-a") == 0)
 			base64=1;
 		else if	(strcmp(*argv,"-base64") == 0)
 			base64=1;
 #ifdef ZLIB
 		else if	(strcmp(*argv,"-z") == 0)
 			do_zlib=1;
 #endif
 		else if (strcmp(*argv,"-bufsize") == 0)
 			{
 			if (--argc < 1) goto bad;
 			bufsize=(unsigned char *)*(++argv);
 			}
 		else if (strcmp(*argv,"-k") == 0)
 			{
 			if (--argc < 1) goto bad;
 			str= *(++argv);
 			}
 		else if (strcmp(*argv,"-kfile") == 0)
 			{
 			static char buf[128];
 			FILE *infile;
 			char *file;

 			if (--argc < 1) goto bad;
 			file= *(++argv);
 			infile=fopen(file,"r");
 			if (infile == NULL)
 				{
 				BIO_printf(bio_err,"unable to read key from '%s'\n",
 					file);
 				goto bad;
 				}
 			buf[0]='\0';
 			if (!fgets(buf,sizeof buf,infile))
 				{
 				BIO_printf(bio_err,"unable to read key from '%s'\n",
 					file);
 				goto bad;
 				}
 			fclose(infile);
 			i=strlen(buf);
 			if ((i > 0) &&
 				((buf[i-1] == '\n') || (buf[i-1] == '\r')))
 				buf[--i]='\0';
 			if ((i > 0) &&
 				((buf[i-1] == '\n') || (buf[i-1] == '\r')))
 				buf[--i]='\0';
 			if (i < 1)
 				{
 				BIO_printf(bio_err,"zero length password\n");
 				goto bad;
 				}
 			str=buf;
 			}
 		else if (strcmp(*argv,"-K") == 0)
 			{
 			if (--argc < 1) goto bad;
 			hkey= *(++argv);
 			}
 		else if (strcmp(*argv,"-S") == 0)
 			{
 			if (--argc < 1) goto bad;
 			hsalt= *(++argv);
 			}
 		else if (strcmp(*argv,"-iv") == 0)
 			{
 			if (--argc < 1) goto bad;
 			hiv= *(++argv);
 			}
 		else if (strcmp(*argv,"-md") == 0)
 			{
 			if (--argc < 1) goto bad;
 			md= *(++argv);
 			}
 		else if	((argv[0][0] == '-') &&
 			((c=EVP_get_cipherbyname(&(argv[0][1]))) != NULL))
 			{
 			cipher=c;
 			}
 		else if (strcmp(*argv,"-none") == 0)
 			cipher=NULL;
 		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 pass phrase source\n","-pass <arg>");
 			BIO_printf(bio_err,"%-14s encrypt\n","-e");
 			BIO_printf(bio_err,"%-14s decrypt\n","-d");
 			BIO_printf(bio_err,"%-14s base64 encode/decode, depending on encryption flag\n","-a/-base64");
 			BIO_printf(bio_err,"%-14s passphrase is the next argument\n","-k");
 			BIO_printf(bio_err,"%-14s passphrase is the first line of the file argument\n","-kfile");
 			BIO_printf(bio_err,"%-14s the next argument is the md to use to create a key\n","-md");
 			BIO_printf(bio_err,"%-14s   from a passphrase.  One of md2, md5, sha or sha1\n","");
 			BIO_printf(bio_err,"%-14s salt in hex is the next argument\n","-S");
 			BIO_printf(bio_err,"%-14s key/iv in hex is the next argument\n","-K/-iv");
 			BIO_printf(bio_err,"%-14s print the iv/key (then exit if -P)\n","-[pP]");
 			BIO_printf(bio_err,"%-14s buffer size\n","-bufsize <n>");
 			BIO_printf(bio_err,"%-14s disable standard block padding\n","-nopad");
 #ifndef OPENSSL_NO_ENGINE
 			BIO_printf(bio_err,"%-14s use engine e, possibly a hardware device.\n","-engine e");
 #endif

 			BIO_printf(bio_err,"Cipher Types\n");
 			OBJ_NAME_do_all_sorted(OBJ_NAME_TYPE_CIPHER_METH,
 					       show_ciphers,
 					       bio_err);
 			BIO_printf(bio_err,"\n");

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

 #ifndef OPENSSL_NO_ENGINE
         setup_engine(bio_err, engine, 0);
 #endif

 	if (md && (dgst=EVP_get_digestbyname(md)) == NULL)
 		{
 		BIO_printf(bio_err,"%s is an unsupported message digest type\n",md);
 		goto end;
 		}

 	if (dgst == NULL)
 		{
 		dgst = EVP_md5();
 		}

 	if (bufsize != NULL)
 		{
 		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 (base64 && 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 %ld\n",(long)EVP_ENCODE_LENGTH(bsize));
 		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,(char *)bio_err);
 		BIO_set_callback_arg(out,(char *)bio_err);
 		}

 	if (inf == NULL)
 	        {
 #ifndef OPENSSL_NO_SETVBUF_IONBF
 		if (bufsize != NULL)
 			setvbuf(stdin, (char *)NULL, _IONBF, 0);
 #endif /* ndef OPENSSL_NO_SETVBUF_IONBF */
 		BIO_set_fp(in,stdin,BIO_NOCLOSE);
 	        }
 	else
 		{
 		if (BIO_read_filename(in,inf) <= 0)
 			{
 			perror(inf);
 			goto end;
 			}
 		}

 	if(!str && passarg) {
 		if(!app_passwd(bio_err, passarg, NULL, &pass, NULL)) {
 			BIO_printf(bio_err, "Error getting password\n");
 			goto end;
 		}
 		str = pass;
 	}

 	if ((str == NULL) && (cipher != NULL) && (hkey == NULL))
 		{
 		for (;;)
 			{
 			char buf[200];

 			BIO_snprintf(buf,sizeof buf,"enter %s %s password:",
 				     OBJ_nid2ln(EVP_CIPHER_nid(cipher)),
 				     (enc)?"encryption":"decryption");
 			strbuf[0]='\0';
 			i=EVP_read_pw_string((char *)strbuf,SIZE,buf,enc);
 			if (i == 0)
 				{
 				if (strbuf[0] == '\0')
 					{
 					ret=1;
 					goto end;
 					}
 				str=strbuf;
 				break;
 				}
 			if (i < 0)
 				{
 				BIO_printf(bio_err,"bad password read\n");
 				goto end;
 				}
 			}
 		}


 	if (outf == NULL)
 		{
 		BIO_set_fp(out,stdout,BIO_NOCLOSE);
 #ifndef OPENSSL_NO_SETVBUF_IONBF
 		if (bufsize != NULL)
 			setvbuf(stdout, (char *)NULL, _IONBF, 0);
 #endif /* ndef OPENSSL_NO_SETVBUF_IONBF */
 #ifdef OPENSSL_SYS_VMS
 		{
 		BIO *tmpbio = BIO_new(BIO_f_linebuffer());
 		out = BIO_push(tmpbio, out);
 		}
 #endif
 		}
 	else
 		{
 		if (BIO_write_filename(out,outf) <= 0)
 			{
 			perror(outf);
 			goto end;
 			}
 		}

 	rbio=in;
 	wbio=out;

 #ifdef ZLIB

 	if (do_zlib)
 		{
 		if ((bzl=BIO_new(BIO_f_zlib())) == NULL)
 			goto end;
 		if (enc)
 			wbio=BIO_push(bzl,wbio);
 		else
 			rbio=BIO_push(bzl,rbio);
 		}
 #endif

 	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,(char *)bio_err);
 			}
 		if (olb64)
 			BIO_set_flags(b64,BIO_FLAGS_BASE64_NO_NL);
 		if (enc)
 			wbio=BIO_push(b64,wbio);
 		else
 			rbio=BIO_push(b64,rbio);
 		}

 	if (cipher != NULL)
 		{
 		/* Note that str is NULL if a key was passed on the command
 		 * line, so we get no salt in that case. Is this a bug?
 		 */
 		if (str != NULL)
 			{
 			/* Salt handling: if encrypting generate a salt and
 			 * write to output BIO. If decrypting read salt from
 			 * input BIO.
 			 */
 			unsigned char *sptr;
 			if(nosalt) sptr = NULL;
 			else {
 				if(enc) {
 					if(hsalt) {
 						if(!set_hex(hsalt,salt,sizeof salt)) {
 							BIO_printf(bio_err,
 								"invalid hex salt value\n");
 							goto end;
 						}
 					} else if (RAND_pseudo_bytes(salt, sizeof salt) < 0)
 						goto end;
 					/* If -P option then don't bother writing */
 					if((printkey != 2)
 					   && (BIO_write(wbio,magic,
 							 sizeof magic-1) != sizeof magic-1
 					       || BIO_write(wbio,
 							    (char *)salt,
 							    sizeof salt) != sizeof salt)) {
 						BIO_printf(bio_err,"error writing output file\n");
 						goto end;
 					}
 				} else if(BIO_read(rbio,mbuf,sizeof mbuf) != sizeof mbuf
 					  || BIO_read(rbio,
 						      (unsigned char *)salt,
 				    sizeof salt) != sizeof salt) {
 					BIO_printf(bio_err,"error reading input file\n");
 					goto end;
 				} else if(memcmp(mbuf,magic,sizeof magic-1)) {
 				    BIO_printf(bio_err,"bad magic number\n");
 				    goto end;
 				}

 				sptr = salt;
 			}

 			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)
 		    && EVP_CIPHER_iv_length(cipher) != 0)
 			{
 			/* 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,(char *)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);
 #ifdef ZLIB
 	if (bzl != NULL) BIO_free(bzl);
 #endif
 	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);
 	}
	/* apps/enc.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.]
	*/

	#include <stdio.h>
	#include <stdlib.h>
	#include <string.h>
	#include "apps.h"
	#include <openssl/bio.h>
	#include <openssl/err.h>
	#include <openssl/evp.h>
	#include <openssl/objects.h>
	#include <openssl/x509.h>
	#include <openssl/rand.h>
	#include <openssl/pem.h>
	#include <openssl/comp.h>
	#include <ctype.h>

	int set_hex(char in,unsigned char out,int size);
	#undef SIZE
	#undef BSIZE
	#undef PROG

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

	static void show_ciphers(const OBJ_NAME name,void bio_)
	{
	BIO *bio=bio_;
	static int n;

	if(!islower((unsigned char)*name->name))
	return;

	BIO_printf(bio,"-%-25s",name->name);
	if(++n == 3)
	{
	BIO_printf(bio,"\n");
	n=0;
	}
	else
	BIO_printf(bio," ");
	}

	int MAIN(int, char **);

	int MAIN(int argc, char **argv)
	{
	static const char magic[]="Salted__";
	char mbuf[sizeof magic-1];
	char *strbuf=NULL;
	unsigned char buff=NULL,bufsize=NULL;
	int bsize=BSIZE,verbose=0;
	int ret=1,inl;
	int nopad = 0;
	unsigned char key[EVP_MAX_KEY_LENGTH],iv[EVP_MAX_IV_LENGTH];
	unsigned char salt[PKCS5_SALT_LEN];
	char str=NULL, passarg = NULL, *pass = NULL;
	char hkey=NULL,hiv=NULL,*hsalt = NULL;
	char *md=NULL;
	int enc=1,printkey=0,i,base64=0;
	#ifdef ZLIB
	int do_zlib=0;
	BIO *bzl = NULL;
	#endif
	int debug=0,olb64=0,nosalt=0;
	const EVP_CIPHER cipher=NULL,c;
	EVP_CIPHER_CTX *ctx = NULL;
	char inf=NULL,outf=NULL;
	BIO in=NULL,out=NULL,b64=NULL,benc=NULL,rbio=NULL,wbio=NULL;
	#define PROG_NAME_SIZE 39
	char pname[PROG_NAME_SIZE+1];
	#ifndef OPENSSL_NO_ENGINE
	char *engine = NULL;
	#endif
	const EVP_MD *dgst=NULL;

	apps_startup();

	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 (!load_config(bio_err, NULL))
	goto end;

	/* first check the program name */
	program_name(argv[0],pname,sizeof pname);
	if (strcmp(pname,"base64") == 0)
	base64=1;
	#ifdef ZLIB
	if (strcmp(pname,"zlib") == 0)
	do_zlib=1;
	#endif

	cipher=EVP_get_cipherbyname(pname);
	#ifdef ZLIB
	if (!do_zlib && !base64 && (cipher == NULL)
	&& (strcmp(pname,"enc") != 0))
	#else
	if (!base64 && (cipher == NULL) && (strcmp(pname,"enc") != 0))
	#endif
	{
	BIO_printf(bio_err,"%s is an unknown cipher\n",pname);
	goto bad;
	}

	argc--;
	argv++;
	while (argc >= 1)
	{
	if (strcmp(*argv,"-e") == 0)
	enc=1;
	else 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,"-pass") == 0)
	{
	if (--argc < 1) goto bad;
	passarg= *(++argv);
	}
	#ifndef OPENSSL_NO_ENGINE
	else if (strcmp(*argv,"-engine") == 0)
	{
	if (--argc < 1) goto bad;
	engine= *(++argv);
	}
	#endif
	else if (strcmp(*argv,"-d") == 0)
	enc=0;
	else if (strcmp(*argv,"-p") == 0)
	printkey=1;
	else if (strcmp(*argv,"-v") == 0)
	verbose=1;
	else if (strcmp(*argv,"-nopad") == 0)
	nopad=1;
	else if (strcmp(*argv,"-salt") == 0)
	nosalt=0;
	else if (strcmp(*argv,"-nosalt") == 0)
	nosalt=1;
	else if (strcmp(*argv,"-debug") == 0)
	debug=1;
	else if (strcmp(*argv,"-P") == 0)
	printkey=2;
	else if (strcmp(*argv,"-A") == 0)
	olb64=1;
	else if (strcmp(*argv,"-a") == 0)
	base64=1;
	else if (strcmp(*argv,"-base64") == 0)
	base64=1;
	#ifdef ZLIB
	else if (strcmp(*argv,"-z") == 0)
	do_zlib=1;
	#endif
	else if (strcmp(*argv,"-bufsize") == 0)
	{
	if (--argc < 1) goto bad;
	bufsize=(unsigned char )(++argv);
	}
	else if (strcmp(*argv,"-k") == 0)
	{
	if (--argc < 1) goto bad;
	str= *(++argv);
	}
	else if (strcmp(*argv,"-kfile") == 0)
	{
	static char buf[128];
	FILE *infile;
	char *file;

	if (--argc < 1) goto bad;
	file= *(++argv);
	infile=fopen(file,"r");
	if (infile == NULL)
	{
	BIO_printf(bio_err,"unable to read key from '%s'\n",
	file);
	goto bad;
	}
	buf[0]='\0';
	if (!fgets(buf,sizeof buf,infile))
	{
	BIO_printf(bio_err,"unable to read key from '%s'\n",
	file);
	goto bad;
	}
	fclose(infile);
	i=strlen(buf);
	if ((i > 0) &&
	((buf[i-1] == '\n') \|\| (buf[i-1] == '\r')))
	buf[--i]='\0';
	if ((i > 0) &&
	((buf[i-1] == '\n') \|\| (buf[i-1] == '\r')))
	buf[--i]='\0';
	if (i < 1)
	{
	BIO_printf(bio_err,"zero length password\n");
	goto bad;
	}
	str=buf;
	}
	else if (strcmp(*argv,"-K") == 0)
	{
	if (--argc < 1) goto bad;
	hkey= *(++argv);
	}
	else if (strcmp(*argv,"-S") == 0)
	{
	if (--argc < 1) goto bad;
	hsalt= *(++argv);
	}
	else if (strcmp(*argv,"-iv") == 0)
	{
	if (--argc < 1) goto bad;
	hiv= *(++argv);
	}
	else if (strcmp(*argv,"-md") == 0)
	{
	if (--argc < 1) goto bad;
	md= *(++argv);
	}
	else if ((argv[0][0] == '-') &&
	((c=EVP_get_cipherbyname(&(argv[0][1]))) != NULL))
	{
	cipher=c;
	}
	else if (strcmp(*argv,"-none") == 0)
	cipher=NULL;
	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 pass phrase source\n","-pass <arg>");
	BIO_printf(bio_err,"%-14s encrypt\n","-e");
	BIO_printf(bio_err,"%-14s decrypt\n","-d");
	BIO_printf(bio_err,"%-14s base64 encode/decode, depending on encryption flag\n","-a/-base64");
	BIO_printf(bio_err,"%-14s passphrase is the next argument\n","-k");
	BIO_printf(bio_err,"%-14s passphrase is the first line of the file argument\n","-kfile");
	BIO_printf(bio_err,"%-14s the next argument is the md to use to create a key\n","-md");
	BIO_printf(bio_err,"%-14s from a passphrase. One of md2, md5, sha or sha1\n","");
	BIO_printf(bio_err,"%-14s salt in hex is the next argument\n","-S");
	BIO_printf(bio_err,"%-14s key/iv in hex is the next argument\n","-K/-iv");
	BIO_printf(bio_err,"%-14s print the iv/key (then exit if -P)\n","-[pP]");
	BIO_printf(bio_err,"%-14s buffer size\n","-bufsize <n>");
	BIO_printf(bio_err,"%-14s disable standard block padding\n","-nopad");
	#ifndef OPENSSL_NO_ENGINE
	BIO_printf(bio_err,"%-14s use engine e, possibly a hardware device.\n","-engine e");
	#endif

	BIO_printf(bio_err,"Cipher Types\n");
	OBJ_NAME_do_all_sorted(OBJ_NAME_TYPE_CIPHER_METH,
	show_ciphers,
	bio_err);
	BIO_printf(bio_err,"\n");

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

	#ifndef OPENSSL_NO_ENGINE
	setup_engine(bio_err, engine, 0);
	#endif

	if (md && (dgst=EVP_get_digestbyname(md)) == NULL)
	{
	BIO_printf(bio_err,"%s is an unsupported message digest type\n",md);
	goto end;
	}

	if (dgst == NULL)
	{
	dgst = EVP_md5();
	}

	if (bufsize != NULL)
	{
	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 (base64 && 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 %ld\n",(long)EVP_ENCODE_LENGTH(bsize));
	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,(char *)bio_err);
	BIO_set_callback_arg(out,(char *)bio_err);
	}

	if (inf == NULL)
	{
	#ifndef OPENSSL_NO_SETVBUF_IONBF
	if (bufsize != NULL)
	setvbuf(stdin, (char *)NULL, _IONBF, 0);
	#endif /* ndef OPENSSL_NO_SETVBUF_IONBF */
	BIO_set_fp(in,stdin,BIO_NOCLOSE);
	}
	else
	{
	if (BIO_read_filename(in,inf) <= 0)
	{
	perror(inf);
	goto end;
	}
	}

	if(!str && passarg) {
	if(!app_passwd(bio_err, passarg, NULL, &pass, NULL)) {
	BIO_printf(bio_err, "Error getting password\n");
	goto end;
	}
	str = pass;
	}

	if ((str == NULL) && (cipher != NULL) && (hkey == NULL))
	{
	for (;;)
	{
	char buf[200];

	BIO_snprintf(buf,sizeof buf,"enter %s %s password:",
	OBJ_nid2ln(EVP_CIPHER_nid(cipher)),
	(enc)?"encryption":"decryption");
	strbuf[0]='\0';
	i=EVP_read_pw_string((char *)strbuf,SIZE,buf,enc);
	if (i == 0)
	{
	if (strbuf[0] == '\0')
	{
	ret=1;
	goto end;
	}
	str=strbuf;
	break;
	}
	if (i < 0)
	{
	BIO_printf(bio_err,"bad password read\n");
	goto end;
	}
	}
	}


	if (outf == NULL)
	{
	BIO_set_fp(out,stdout,BIO_NOCLOSE);
	#ifndef OPENSSL_NO_SETVBUF_IONBF
	if (bufsize != NULL)
	setvbuf(stdout, (char *)NULL, _IONBF, 0);
	#endif /* ndef OPENSSL_NO_SETVBUF_IONBF */
	#ifdef OPENSSL_SYS_VMS
	{
	BIO *tmpbio = BIO_new(BIO_f_linebuffer());
	out = BIO_push(tmpbio, out);
	}
	#endif
	}
	else
	{
	if (BIO_write_filename(out,outf) <= 0)
	{
	perror(outf);
	goto end;
	}
	}

	rbio=in;
	wbio=out;

	#ifdef ZLIB

	if (do_zlib)
	{
	if ((bzl=BIO_new(BIO_f_zlib())) == NULL)
	goto end;
	if (enc)
	wbio=BIO_push(bzl,wbio);
	else
	rbio=BIO_push(bzl,rbio);
	}
	#endif

	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,(char *)bio_err);
	}
	if (olb64)
	BIO_set_flags(b64,BIO_FLAGS_BASE64_NO_NL);
	if (enc)
	wbio=BIO_push(b64,wbio);
	else
	rbio=BIO_push(b64,rbio);
	}

	if (cipher != NULL)
	{
	/* Note that str is NULL if a key was passed on the command
	* line, so we get no salt in that case. Is this a bug?
	*/
	if (str != NULL)
	{
	/* Salt handling: if encrypting generate a salt and
	* write to output BIO. If decrypting read salt from
	* input BIO.
	*/
	unsigned char *sptr;
	if(nosalt) sptr = NULL;
	else {
	if(enc) {
	if(hsalt) {
	if(!set_hex(hsalt,salt,sizeof salt)) {
	BIO_printf(bio_err,
	"invalid hex salt value\n");
	goto end;
	}
	} else if (RAND_pseudo_bytes(salt, sizeof salt) < 0)
	goto end;
	/* If -P option then don't bother writing */
	if((printkey != 2)
	&& (BIO_write(wbio,magic,
	sizeof magic-1) != sizeof magic-1
	\|\| BIO_write(wbio,
	(char *)salt,
	sizeof salt) != sizeof salt)) {
	BIO_printf(bio_err,"error writing output file\n");
	goto end;
	}
	} else if(BIO_read(rbio,mbuf,sizeof mbuf) != sizeof mbuf
	\|\| BIO_read(rbio,
	(unsigned char *)salt,
	sizeof salt) != sizeof salt) {
	BIO_printf(bio_err,"error reading input file\n");
	goto end;
	} else if(memcmp(mbuf,magic,sizeof magic-1)) {
	BIO_printf(bio_err,"bad magic number\n");
	goto end;
	}

	sptr = salt;
	}

	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)
	&& EVP_CIPHER_iv_length(cipher) != 0)
	{
	/* 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,(char *)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);
	#ifdef ZLIB
	if (bzl != NULL) BIO_free(bzl);
	#endif
	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);
	}