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openssl/crypto/des/des.c
Richard Levitte c2e4f17c1a Due to an increasing number of clashes between modern OpenSSL and 
libdes (which is still used out there) or other des implementations,
the OpenSSL DES functions are renamed to begin with DES_ instead of
des_.  Compatibility routines are provided and declared by including
openssl/des_old.h.  Those declarations are the same as were in des.h
when the OpenSSL project started, which is exactly how libdes looked
at that time, and hopefully still looks today.

The compatibility functions will be removed in some future release, at
the latest in version 1.0.
2001-10-24 21:21:12 +00:00

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/* 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);
p+=strlen(cksumname);
break;
case 'C':
cflag=1;
longk=1;
strncpy(cksumname,p,200);
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);
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);
memset(k2,0,sizeof(k2));
}
else if (longk || flag3)
{
if (flag3)
{
DES_string_to_2keys(key,&kk,&k2);
DES_set_key_unchecked(&k2,&ks2);
memset(k2,0,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);
memset(key,0,sizeof(key));
memset(kk,0,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:
memset(buf,0,sizeof(buf));
memset(obuf,0,sizeof(obuf));
memset(&ks,0,sizeof(ks));
memset(&ks2,0,sizeof(ks2));
memset(iv,0,sizeof(iv));
memset(iv2,0,sizeof(iv2));
memset(kk,0,sizeof(kk));
memset(k2,0,sizeof(k2));
memset(uubuf,0,sizeof(uubuf));
memset(b,0,sizeof(b));
memset(bb,0,sizeof(bb));
memset(cksum,0,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);
}
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