/* crypto/des/des.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 <openssl/opensslconf.h>

 #ifndef OPENSSL_SYS_MSDOS

 #ifndef OPENSSL_SYS_VMS

 #include OPENSSL_UNISTD

 #else /* OPENSSL_SYS_VMS */

 #ifdef __DECC

 #include <unistd.h>

 #else /* not __DECC */

 #include <math.h>

 #endif /* __DECC */

 #endif /* OPENSSL_SYS_VMS */

 #else /* OPENSSL_SYS_MSDOS */

 #include <io.h>

 #endif

 #include <time.h>

 #include "des_ver.h"

 #ifdef OPENSSL_SYS_VMS

 #include <types.h>

 #include <stat.h>

 #else

 #ifndef _IRIX

 #include <sys/types.h>

 #endif

 #include <sys/stat.h>

 #endif

 #include <openssl/des.h>

 #include <openssl/rand.h>

 #include <openssl/ui_compat.h>

 void usage(void);

 void doencryption(void);

 int uufwrite(unsigned char *data, int size, unsigned int num, FILE *fp);

 void uufwriteEnd(FILE *fp);

 int uufread(unsigned char *out,int size,unsigned int num,FILE *fp);

 int uuencode(unsigned char *in,int num,unsigned char *out);

 int uudecode(unsigned char *in,int num,unsigned char *out);

 void DES_3cbc_encrypt(DES_cblock *input,DES_cblock *output,long length,

 	DES_key_schedule sk1,DES_key_schedule sk2,

 	DES_cblock *ivec1,DES_cblock *ivec2,int enc);

 #ifdef OPENSSL_SYS_VMS

 #define EXIT(a) exit(a&0x10000000L)

 #else

 #define EXIT(a) exit(a)

 #endif

 #define BUFSIZE (8*1024)

 #define VERIFY  1

 #define KEYSIZ	8

 #define KEYSIZB 1024 /* should hit tty line limit first :-) */

 char key[KEYSIZB+1];

 int do_encrypt,longk=0;

 FILE *DES_IN,*DES_OUT,*CKSUM_OUT;

 char uuname[200];

 unsigned char uubuf[50];

 int uubufnum=0;

 #define INUUBUFN	(45*100)

 #define OUTUUBUF	(65*100)

 unsigned char b[OUTUUBUF];

 unsigned char bb[300];

 DES_cblock cksum={0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};

 char cksumname[200]="";

 int vflag,cflag,eflag,dflag,kflag,bflag,fflag,sflag,uflag,flag3,hflag,error;

 int main(int argc, char **argv)

 	{

 	int i;

 	struct stat ins,outs;

 	char *p;

 	char *in=NULL,*out=NULL;

 	vflag=cflag=eflag=dflag=kflag=hflag=bflag=fflag=sflag=uflag=flag3=0;

 	error=0;

 	memset(key,0,sizeof(key));

 	for (i=1; i<argc; i++)

 		{

 		p=argv[i];

 		if ((p[0] == '-') && (p[1] != '\0'))

 			{

 			p++;

 			while (*p)

 				{

 				switch (*(p++))

 					{

 				case '3':

 					flag3=1;

 					longk=1;

 					break;

 				case 'c':

 					cflag=1;

 					strncpy(cksumname,p,200);

 					cksumname[sizeof(cksumname)-1]='\0';

 					p+=strlen(cksumname);

 					break;

 				case 'C':

 					cflag=1;

 					longk=1;

 					strncpy(cksumname,p,200);

 					cksumname[sizeof(cksumname)-1]='\0';

 					p+=strlen(cksumname);

 					break;

 				case 'e':

 					eflag=1;

 					break;

 				case 'v':

 					vflag=1;

 					break;

 				case 'E':

 					eflag=1;

 					longk=1;

 					break;

 				case 'd':

 					dflag=1;

 					break;

 				case 'D':

 					dflag=1;

 					longk=1;

 					break;

 				case 'b':

 					bflag=1;

 					break;

 				case 'f':

 					fflag=1;

 					break;

 				case 's':

 					sflag=1;

 					break;

 				case 'u':

 					uflag=1;

 					strncpy(uuname,p,200);

 					uuname[sizeof(uuname)-1]='\0';

 					p+=strlen(uuname);

 					break;

 				case 'h':

 					hflag=1;

 					break;

 				case 'k':

 					kflag=1;

 					if ((i+1) == argc)

 						{

 						fputs("must have a key with the -k option\n",stderr);

 						error=1;

 						}

 					else

 						{

 						int j;

 						i++;

 						strncpy(key,argv[i],KEYSIZB);

 						for (j=strlen(argv[i])-1; j>=0; j--)

 							argv[i][j]='\0';

 						}

 					break;

 				default:

 					fprintf(stderr,"'%c' unknown flag\n",p[-1]);

 					error=1;

 					break;

 					}

 				}

 			}

 		else

 			{

 			if (in == NULL)

 				in=argv[i];

 			else if (out == NULL)

 				out=argv[i];

 			else

 				error=1;

 			}

 		}

 	if (error) usage();

 	/* We either

 	 * do checksum or

 	 * do encrypt or

 	 * do decrypt or

 	 * do decrypt then ckecksum or

 	 * do checksum then encrypt

 	 */

 	if (((eflag+dflag) == 1) || cflag)

 		{

 		if (eflag) do_encrypt=DES_ENCRYPT;

 		if (dflag) do_encrypt=DES_DECRYPT;

 		}

 	else

 		{

 		if (vflag) 

 			{

 #ifndef _Windows			

 			fprintf(stderr,"des(1) built with %s\n",libdes_version);

 #endif			

 			EXIT(1);

 			}

 		else usage();

 		}

 #ifndef _Windows			

 	if (vflag) fprintf(stderr,"des(1) built with %s\n",libdes_version);

 #endif			

 	if (	(in != NULL) &&

 		(out != NULL) &&

 #ifndef OPENSSL_SYS_MSDOS

 		(stat(in,&ins) != -1) &&

 		(stat(out,&outs) != -1) &&

 		(ins.st_dev == outs.st_dev) &&

 		(ins.st_ino == outs.st_ino))

 #else /* OPENSSL_SYS_MSDOS */

 		(strcmp(in,out) == 0))

 #endif

 			{

 			fputs("input and output file are the same\n",stderr);

 			EXIT(3);

 			}

 	if (!kflag)

 		if (des_read_pw_string(key,KEYSIZB+1,"Enter key:",eflag?VERIFY:0))

 			{

 			fputs("password error\n",stderr);

 			EXIT(2);

 			}

 	if (in == NULL)

 		DES_IN=stdin;

 	else if ((DES_IN=fopen(in,"r")) == NULL)

 		{

 		perror("opening input file");

 		EXIT(4);

 		}

 	CKSUM_OUT=stdout;

 	if (out == NULL)

 		{

 		DES_OUT=stdout;

 		CKSUM_OUT=stderr;

 		}

 	else if ((DES_OUT=fopen(out,"w")) == NULL)

 		{

 		perror("opening output file");

 		EXIT(5);

 		}

 #ifdef OPENSSL_SYS_MSDOS

 	/* This should set the file to binary mode. */

 	{

 #include <fcntl.h>

 	if (!(uflag && dflag))

 		setmode(fileno(DES_IN),O_BINARY);

 	if (!(uflag && eflag))

 		setmode(fileno(DES_OUT),O_BINARY);

 	}

 #endif

 	doencryption();

 	fclose(DES_IN);

 	fclose(DES_OUT);

 	EXIT(0);

 	}

 void usage(void)

 	{

 	char **u;

 	static const char *Usage[]={

 "des <options> [input-file [output-file]]",

 "options:",

 "-v         : des(1) version number",

 "-e         : encrypt using SunOS compatible user key to DES key conversion.",

 "-E         : encrypt ",

 "-d         : decrypt using SunOS compatible user key to DES key conversion.",

 "-D         : decrypt ",

 "-c[ckname] : generate a cbc_cksum using SunOS compatible user key to",

 "             DES key conversion and output to ckname (stdout default,",

 "             stderr if data being output on stdout).  The checksum is",

 "             generated before encryption and after decryption if used",

 "             in conjunction with -[eEdD].",

 "-C[ckname] : generate a cbc_cksum as for -c but compatible with -[ED].",

 "-k key     : use key 'key'",

 "-h         : the key that is entered will be a hexadecimal number",

 "             that is used directly as the des key",

 "-u[uuname] : input file is uudecoded if -[dD] or output uuencoded data if -[eE]",

 "             (uuname is the filename to put in the uuencode header).",

 "-b         : encrypt using DES in ecb encryption mode, the default is cbc mode.",

 "-3         : encrypt using triple DES encryption.  This uses 2 keys",

 "             generated from the input key.  If the input key is less",

 "             than 8 characters long, this is equivalent to normal",

 "             encryption.  Default is triple cbc, -b makes it triple ecb.",

 NULL

 };

 	for (u=(char **)Usage; *u; u++)

 		{

 		fputs(*u,stderr);

 		fputc('\n',stderr);

 		}

 	EXIT(1);

 	}

 void doencryption(void)

 	{

 #ifdef _LIBC

 	extern unsigned long time();

 #endif

 	register int i;

 	DES_key_schedule ks,ks2;

 	DES_cblock iv,iv2;

 	char *p;

 	int num=0,j,k,l,rem,ll,len,last,ex=0;

 	DES_cblock kk,k2;

 	FILE *O;

 	int Exit=0;

 #ifndef OPENSSL_SYS_MSDOS

 	static unsigned char buf[BUFSIZE+8],obuf[BUFSIZE+8];

 #else

 	static unsigned char *buf=NULL,*obuf=NULL;

 	if (buf == NULL)

 		{

 		if (    (( buf=OPENSSL_malloc(BUFSIZE+8)) == NULL) ||

 			((obuf=OPENSSL_malloc(BUFSIZE+8)) == NULL))

 			{

 			fputs("Not enough memory\n",stderr);

 			Exit=10;

 			goto problems;

 			}

 		}

 #endif

 	if (hflag)

 		{

 		j=(flag3?16:8);

 		p=key;

 		for (i=0; i<j; i++)

 			{

 			k=0;

 			if ((*p <= '9') && (*p >= '0'))

 				k=(*p-'0')<<4;

 			else if ((*p <= 'f') && (*p >= 'a'))

 				k=(*p-'a'+10)<<4;

 			else if ((*p <= 'F') && (*p >= 'A'))

 				k=(*p-'A'+10)<<4;

 			else

 				{

 				fputs("Bad hex key\n",stderr);

 				Exit=9;

 				goto problems;

 				}

 			p++;

 			if ((*p <= '9') && (*p >= '0'))

 				k|=(*p-'0');

 			else if ((*p <= 'f') && (*p >= 'a'))

 				k|=(*p-'a'+10);

 			else if ((*p <= 'F') && (*p >= 'A'))

 				k|=(*p-'A'+10);

 			else

 				{

 				fputs("Bad hex key\n",stderr);

 				Exit=9;

 				goto problems;

 				}

 			p++;

 			if (i < 8)

 				kk[i]=k;

 			else

 				k2[i-8]=k;

 			}

 		DES_set_key_unchecked(&k2,&ks2);

 		OPENSSL_cleanse(k2,sizeof(k2));

 		}

 	else if (longk || flag3)

 		{

 		if (flag3)

 			{

 			DES_string_to_2keys(key,&kk,&k2);

 			DES_set_key_unchecked(&k2,&ks2);

 			OPENSSL_cleanse(k2,sizeof(k2));

 			}

 		else

 			DES_string_to_key(key,&kk);

 		}

 	else

 		for (i=0; i<KEYSIZ; i++)

 			{

 			l=0;

 			k=key[i];

 			for (j=0; j<8; j++)

 				{

 				if (k&1) l++;

 				k>>=1;

 				}

 			if (l & 1)

 				kk[i]=key[i]&0x7f;

 			else

 				kk[i]=key[i]|0x80;

 			}

 	DES_set_key_unchecked(&kk,&ks);

 	OPENSSL_cleanse(key,sizeof(key));

 	OPENSSL_cleanse(kk,sizeof(kk));

 	/* woops - A bug that does not showup under unix :-( */

 	memset(iv,0,sizeof(iv));

 	memset(iv2,0,sizeof(iv2));

 	l=1;

 	rem=0;

 	/* first read */

 	if (eflag || (!dflag && cflag))

 		{

 		for (;;)

 			{

 			num=l=fread(&(buf[rem]),1,BUFSIZE,DES_IN);

 			l+=rem;

 			num+=rem;

 			if (l < 0)

 				{

 				perror("read error");

 				Exit=6;

 				goto problems;

 				}

 			rem=l%8;

 			len=l-rem;

 			if (feof(DES_IN))

 				{

 				for (i=7-rem; i>0; i--)

 					RAND_pseudo_bytes(buf + l++, 1);

 				buf[l++]=rem;

 				ex=1;

 				len+=rem;

 				}

 			else

 				l-=rem;

 			if (cflag)

 				{

 				DES_cbc_cksum(buf,&cksum,

 					(long)len,&ks,&cksum);

 				if (!eflag)

 					{

 					if (feof(DES_IN)) break;

 					else continue;

 					}

 				}

 			if (bflag && !flag3)

 				for (i=0; i<l; i+=8)

 					DES_ecb_encrypt(

 						(DES_cblock *)&(buf[i]),

 						(DES_cblock *)&(obuf[i]),

 						&ks,do_encrypt);

 			else if (flag3 && bflag)

 				for (i=0; i<l; i+=8)

 					DES_ecb2_encrypt(

 						(DES_cblock *)&(buf[i]),

 						(DES_cblock *)&(obuf[i]),

 						&ks,&ks2,do_encrypt);

 			else if (flag3 && !bflag)

 				{

 				char tmpbuf[8];

 				if (rem) memcpy(tmpbuf,&(buf[l]),

 					(unsigned int)rem);

 				DES_3cbc_encrypt(

 					(DES_cblock *)buf,(DES_cblock *)obuf,

 					(long)l,ks,ks2,&iv,

 					&iv2,do_encrypt);

 				if (rem) memcpy(&(buf[l]),tmpbuf,

 					(unsigned int)rem);

 				}

 			else

 				{

 				DES_cbc_encrypt(

 					buf,obuf,

 					(long)l,&ks,&iv,do_encrypt);

 				if (l >= 8) memcpy(iv,&(obuf[l-8]),8);

 				}

 			if (rem) memcpy(buf,&(buf[l]),(unsigned int)rem);

 			i=0;

 			while (i < l)

 				{

 				if (uflag)

 					j=uufwrite(obuf,1,(unsigned int)l-i,

 						DES_OUT);

 				else

 					j=fwrite(obuf,1,(unsigned int)l-i,

 						DES_OUT);

 				if (j == -1)

 					{

 					perror("Write error");

 					Exit=7;

 					goto problems;

 					}

 				i+=j;

 				}

 			if (feof(DES_IN))

 				{

 				if (uflag) uufwriteEnd(DES_OUT);

 				break;

 				}

 			}

 		}

 	else /* decrypt */

 		{

 		ex=1;

 		for (;;)

 			{

 			if (ex) {

 				if (uflag)

 					l=uufread(buf,1,BUFSIZE,DES_IN);

 				else

 					l=fread(buf,1,BUFSIZE,DES_IN);

 				ex=0;

 				rem=l%8;

 				l-=rem;

 				}

 			if (l < 0)

 				{

 				perror("read error");

 				Exit=6;

 				goto problems;

 				}

 			if (bflag && !flag3)

 				for (i=0; i<l; i+=8)

 					DES_ecb_encrypt(

 						(DES_cblock *)&(buf[i]),

 						(DES_cblock *)&(obuf[i]),

 						&ks,do_encrypt);

 			else if (flag3 && bflag)

 				for (i=0; i<l; i+=8)

 					DES_ecb2_encrypt(

 						(DES_cblock *)&(buf[i]),

 						(DES_cblock *)&(obuf[i]),

 						&ks,&ks2,do_encrypt);

 			else if (flag3 && !bflag)

 				{

 				DES_3cbc_encrypt(

 					(DES_cblock *)buf,(DES_cblock *)obuf,

 					(long)l,ks,ks2,&iv,

 					&iv2,do_encrypt);

 				}

 			else

 				{

 				DES_cbc_encrypt(

 					buf,obuf,

 				 	(long)l,&ks,&iv,do_encrypt);

 				if (l >= 8) memcpy(iv,&(buf[l-8]),8);

 				}

 			if (uflag)

 				ll=uufread(&(buf[rem]),1,BUFSIZE,DES_IN);

 			else

 				ll=fread(&(buf[rem]),1,BUFSIZE,DES_IN);

 			ll+=rem;

 			rem=ll%8;

 			ll-=rem;

 			if (feof(DES_IN) && (ll == 0))

 				{

 				last=obuf[l-1];

 				if ((last > 7) || (last < 0))

 					{

 					fputs("The file was not decrypted correctly.\n",

 						stderr);

 					Exit=8;

 					last=0;

 					}

 				l=l-8+last;

 				}

 			i=0;

 			if (cflag) DES_cbc_cksum(obuf,

 				(DES_cblock *)cksum,(long)l/8*8,&ks,

 				(DES_cblock *)cksum);

 			while (i != l)

 				{

 				j=fwrite(obuf,1,(unsigned int)l-i,DES_OUT);

 				if (j == -1)

 					{

 					perror("Write error");

 					Exit=7;

 					goto problems;

 					}

 				i+=j;

 				}

 			l=ll;

 			if ((l == 0) && feof(DES_IN)) break;

 			}

 		}

 	if (cflag)

 		{

 		l=0;

 		if (cksumname[0] != '\0')

 			{

 			if ((O=fopen(cksumname,"w")) != NULL)

 				{

 				CKSUM_OUT=O;

 				l=1;

 				}

 			}

 		for (i=0; i<8; i++)

 			fprintf(CKSUM_OUT,"%02X",cksum[i]);

 		fprintf(CKSUM_OUT,"\n");

 		if (l) fclose(CKSUM_OUT);

 		}

 problems:

 	OPENSSL_cleanse(buf,sizeof(buf));

 	OPENSSL_cleanse(obuf,sizeof(obuf));

 	OPENSSL_cleanse(&ks,sizeof(ks));

 	OPENSSL_cleanse(&ks2,sizeof(ks2));

 	OPENSSL_cleanse(iv,sizeof(iv));

 	OPENSSL_cleanse(iv2,sizeof(iv2));

 	OPENSSL_cleanse(kk,sizeof(kk));

 	OPENSSL_cleanse(k2,sizeof(k2));

 	OPENSSL_cleanse(uubuf,sizeof(uubuf));

 	OPENSSL_cleanse(b,sizeof(b));

 	OPENSSL_cleanse(bb,sizeof(bb));

 	OPENSSL_cleanse(cksum,sizeof(cksum));

 	if (Exit) EXIT(Exit);

 	}

 /*    We ignore this parameter but it should be > ~50 I believe    */

 int uufwrite(unsigned char *data, int size, unsigned int num, FILE *fp)

 	{

 	int i,j,left,rem,ret=num;

 	static int start=1;

 	if (start)

 		{

 		fprintf(fp,"begin 600 %s\n",

 			(uuname[0] == '\0')?"text.d":uuname);

 		start=0;

 		}

 	if (uubufnum)

 		{

 		if (uubufnum+num < 45)

 			{

 			memcpy(&(uubuf[uubufnum]),data,(unsigned int)num);

 			uubufnum+=num;

 			return(num);

 			}

 		else

 			{

 			i=45-uubufnum;

 			memcpy(&(uubuf[uubufnum]),data,(unsigned int)i);

 			j=uuencode((unsigned char *)uubuf,45,b);

 			fwrite(b,1,(unsigned int)j,fp);

 			uubufnum=0;

 			data+=i;

 			num-=i;

 			}

 		}

 	for (i=0; i<(((int)num)-INUUBUFN); i+=INUUBUFN)

 		{

 		j=uuencode(&(data[i]),INUUBUFN,b);

 		fwrite(b,1,(unsigned int)j,fp);

 		}

 	rem=(num-i)%45;

 	left=(num-i-rem);

 	if (left)

 		{

 		j=uuencode(&(data[i]),left,b);

 		fwrite(b,1,(unsigned int)j,fp);

 		i+=left;

 		}

 	if (i != num)

 		{

 		memcpy(uubuf,&(data[i]),(unsigned int)rem);

 		uubufnum=rem;

 		}

 	return(ret);

 	}

 void uufwriteEnd(FILE *fp)

 	{

 	int j;

 	static const char *end=" \nend\n";

 	if (uubufnum != 0)

 		{

 		uubuf[uubufnum]='\0';

 		uubuf[uubufnum+1]='\0';

 		uubuf[uubufnum+2]='\0';

 		j=uuencode(uubuf,uubufnum,b);

 		fwrite(b,1,(unsigned int)j,fp);

 		}

 	fwrite(end,1,strlen(end),fp);

 	}

 /* int size:  should always be > ~ 60; I actually ignore this parameter :-)    */

 int uufread(unsigned char *out, int size, unsigned int num, FILE *fp)

 	{

 	int i,j,tot;

 	static int done=0;

 	static int valid=0;

 	static int start=1;

 	if (start)

 		{

 		for (;;)

 			{

 			b[0]='\0';

 			fgets((char *)b,300,fp);

 			if (b[0] == '\0')

 				{

 				fprintf(stderr,"no 'begin' found in uuencoded input\n");

 				return(-1);

 				}

 			if (strncmp((char *)b,"begin ",6) == 0) break;

 			}

 		start=0;

 		}

 	if (done) return(0);

 	tot=0;

 	if (valid)

 		{

 		memcpy(out,bb,(unsigned int)valid);

 		tot=valid;

 		valid=0;

 		}

 	for (;;)

 		{

 		b[0]='\0';

 		fgets((char *)b,300,fp);

 		if (b[0] == '\0') break;

 		i=strlen((char *)b);

 		if ((b[0] == 'e') && (b[1] == 'n') && (b[2] == 'd'))

 			{

 			done=1;

 			while (!feof(fp))

 				{

 				fgets((char *)b,300,fp);

 				}

 			break;

 			}

 		i=uudecode(b,i,bb);

 		if (i < 0) break;

 		if ((i+tot+8) > num)

 			{

 			/* num to copy to make it a multiple of 8 */

 			j=(num/8*8)-tot-8;

 			memcpy(&(out[tot]),bb,(unsigned int)j);

 			tot+=j;

 			memcpy(bb,&(bb[j]),(unsigned int)i-j);

 			valid=i-j;

 			break;

 			}

 		memcpy(&(out[tot]),bb,(unsigned int)i);

 		tot+=i;

 		}

 	return(tot);

 	}

 #define ccc2l(c,l)      (l =((DES_LONG)(*((c)++)))<<16, \

 			 l|=((DES_LONG)(*((c)++)))<< 8, \

 		 	 l|=((DES_LONG)(*((c)++))))

 #define l2ccc(l,c)      (*((c)++)=(unsigned char)(((l)>>16)&0xff), \

                     *((c)++)=(unsigned char)(((l)>> 8)&0xff), \

                     *((c)++)=(unsigned char)(((l)    )&0xff))

 int uuencode(unsigned char *in, int num, unsigned char *out)

 	{

 	int j,i,n,tot=0;

 	DES_LONG l;

 	register unsigned char *p;

 	p=out;

 	for (j=0; j<num; j+=45)

 		{

 		if (j+45 > num)

 			i=(num-j);

 		else	i=45;

 		*(p++)=i+' ';

 		for (n=0; n<i; n+=3)

 			{

 			ccc2l(in,l);

 			*(p++)=((l>>18)&0x3f)+' ';

 			*(p++)=((l>>12)&0x3f)+' ';

 			*(p++)=((l>> 6)&0x3f)+' ';

 			*(p++)=((l    )&0x3f)+' ';

 			tot+=4;

 			}

 		*(p++)='\n';

 		tot+=2;

 		}

 	*p='\0';

 	l=0;

 	return(tot);

 	}

 int uudecode(unsigned char *in, int num, unsigned char *out)

 	{

 	int j,i,k;

 	unsigned int n=0,space=0;

 	DES_LONG l;

 	DES_LONG w,x,y,z;

 	unsigned int blank=(unsigned int)'\n'-' ';

 	for (j=0; j<num; )

 		{

 		n= *(in++)-' ';

 		if (n == blank)

 			{

 			n=0;

 			in--;

 			}

 		if (n > 60)

 			{

 			fprintf(stderr,"uuencoded line length too long\n");

 			return(-1);

 			}

 		j++;

 		for (i=0; i<n; j+=4,i+=3)

 			{

 			/* the following is for cases where spaces are

 			 * removed from lines.

 			 */

 			if (space)

 				{

 				w=x=y=z=0;

 				}

 			else

 				{

 				w= *(in++)-' ';

 				x= *(in++)-' ';

 				y= *(in++)-' ';

 				z= *(in++)-' ';

 				}

 			if ((w > 63) || (x > 63) || (y > 63) || (z > 63))

 				{

 				k=0;

 				if (w == blank) k=1;

 				if (x == blank) k=2;

 				if (y == blank) k=3;

 				if (z == blank) k=4;

 				space=1;

 				switch (k) {

 				case 1:	w=0; in--;

 				case 2: x=0; in--;

 				case 3: y=0; in--;

 				case 4: z=0; in--;

 					break;

 				case 0:

 					space=0;

 					fprintf(stderr,"bad uuencoded data values\n");

 					w=x=y=z=0;

 					return(-1);

 					break;

 					}

 				}

 			l=(w<<18)|(x<<12)|(y<< 6)|(z    );

 			l2ccc(l,out);

 			}

 		if (*(in++) != '\n')

 			{

 			fprintf(stderr,"missing nl in uuencoded line\n");

 			w=x=y=z=0;

 			return(-1);

 			}

 		j++;

 		}

 	*out='\0';

 	w=x=y=z=0;

 	return(n);

 	}