2 * This file is part of ipif, part of userv-utils
4 * Copyright 1996-2013 Ian Jackson <ijackson@chiark.greenend.org.uk>
5 * Copyright 1998 David Damerell <damerell@chiark.greenend.org.uk>
7 * Chancellor Masters and Scholars of the University of Cambridge
8 * Copyright 2010 Tony Finch <fanf@dotat.at>
10 * This is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 3 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful, but
16 * WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with userv-utils; if not, see http://www.gnu.org/licenses/.
30 static void checkrw(int r, int exp_r, const char *op, FILE *f) {
31 if (ferror(f)) { perror(op); exit(3); }
32 if (feof(f)) { fprintf(stderr,"unexpected eof on %s\n",op); exit(2); }
37 struct blowfish_cbc_state cbc;
38 unsigned char keybuf[BLOWFISH_MAXKEYBYTES], ivbuf[BLOWFISH_BLOCKBYTES];
39 unsigned char ibuf[BLOWFISH_BLOCKBYTES], obuf[BLOWFISH_BLOCKBYTES];
42 r= fread(keybuf,1,sizeof(keybuf),stdin); checkrw(r,sizeof(keybuf),"input",stdin);
43 blowfish_loadkey(&cbc.ek,keybuf,sizeof(keybuf));
45 r= fread(ibuf,1,sizeof(ivbuf),stdin); checkrw(r,sizeof(ivbuf),"input",stdin);
46 blowfish_cbc_setiv(&cbc,ivbuf);
49 r= fread(ibuf,1,sizeof(ibuf),stdin); if (r<sizeof(ibuf) && r>=0) break;
50 checkrw(r,sizeof(ibuf),"input",stdin);
51 blowfish_cbc_encrypt(&cbc,ibuf,obuf);
52 r= fwrite(obuf,1,sizeof(obuf),stdout); checkrw(r,sizeof(obuf),"output",stdout);
54 memset(ibuf+r,sizeof(ibuf)-r,sizeof(ibuf)-r);
55 blowfish_cbc_encrypt(&cbc,ibuf,obuf);
56 r= fwrite(obuf,1,sizeof(obuf),stdout); checkrw(r,sizeof(obuf),"output",stdout);