des.c

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/* crypto/des/des.c */
/* Copyright (C) 1995-1998 Eric Young ([email protected])
 * All rights reserved.
 *
 * This package is an SSL implementation written
 * by Eric Young ([email protected]).
 * The implementation was written so as to conform with Netscapes SSL.
 * 
 * This library is free for commercial and non-commercial use as long as
 * the following conditions are aheared to.  The following conditions
 * apply to all code found in this distribution, be it the RC4, RSA,
 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
 * included with this distribution is covered by the same copyright terms
 * except that the holder is Tim Hudson ([email protected]).
 * 
 * Copyright remains Eric Young's, and as such any Copyright notices in
 * the code are not to be removed.
 * If this package is used in a product, Eric Young should be given attribution
 * as the author of the parts of the library used.
 * This can be in the form of a textual message at program startup or
 * in documentation (online or textual) provided with the package.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *    "This product includes cryptographic software written by
 *     Eric Young ([email protected])"
 *    The word 'cryptographic' can be left out if the rouines from the library
 *    being used are not cryptographic related :-).
 * 4. If you include any Windows specific code (or a derivative thereof) from 
 *    the apps directory (application code) you must include an acknowledgement:
 *    "This product includes software written by Tim Hudson ([email protected])"
 * 
 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * 
 * The licence and distribution terms for any publically available version or
 * derivative of this code cannot be changed.  i.e. this code cannot simply be
 * copied and put under another distribution licence
 * [including the GNU Public Licence.]
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <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);
    }