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
);