diff options
Diffstat (limited to 'openssl/crypto/des/des.c')
| -rw-r--r-- | openssl/crypto/des/des.c | 932 |
1 files changed, 932 insertions, 0 deletions
diff --git a/openssl/crypto/des/des.c b/openssl/crypto/des/des.c new file mode 100644 index 000000000..343135ff9 --- /dev/null +++ b/openssl/crypto/des/des.c @@ -0,0 +1,932 @@ +/* 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); + } |