Mercurial > hg > early-roguelike

annotate rogue5/findpw.c @ 176:db1c9a21a7c3

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
srogue: prevent overflowing the score file name. If SCOREFILE is not defined, roguehome() is called to find a directory for the score file. It copies up to PATH_MAX-20 bytes from an environment variable to a static buffer. Later these are strcpy()'d to scorefile, which is of size LINLEN. Unfortunately LINLEN is 80 and PATH_MAX is at least 256. On Linux, it happens to be 4096. I haven't yet managed to crash or exploit it, but there are surely no beneficial consequences, so roguehome() has been modified to check the length, and the string it returns is also checked in main().
author John "Elwin" Edwards
date Sun, 02 Aug 2015 12:14:47 -0400
parents f502bf60e6e4
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
33
f502bf60e6e4 Import Rogue 5.4 from the Roguelike Restoration Project (r1490)
elwin
parents:
diff changeset
1 /*
f502bf60e6e4 Import Rogue 5.4 from the Roguelike Restoration Project (r1490)
elwin
parents:
diff changeset
2 * print out an encrypted password on the standard output
f502bf60e6e4 Import Rogue 5.4 from the Roguelike Restoration Project (r1490)
elwin
parents:
diff changeset
3 *
f502bf60e6e4 Import Rogue 5.4 from the Roguelike Restoration Project (r1490)
elwin
parents:
diff changeset
4 * @(#)findpw.c 1.4 (Berkeley) 02/05/99
f502bf60e6e4 Import Rogue 5.4 from the Roguelike Restoration Project (r1490)
elwin
parents:
diff changeset
5 *
f502bf60e6e4 Import Rogue 5.4 from the Roguelike Restoration Project (r1490)
elwin
parents:
diff changeset
6 * Rogue: Exploring the Dungeons of Doom
f502bf60e6e4 Import Rogue 5.4 from the Roguelike Restoration Project (r1490)
elwin
parents:
diff changeset
7 * Copyright (C) 1980-1983, 1985, 1999 Michael Toy, Ken Arnold and Glenn Wichman
f502bf60e6e4 Import Rogue 5.4 from the Roguelike Restoration Project (r1490)
elwin
parents:
diff changeset
8 * All rights reserved.
f502bf60e6e4 Import Rogue 5.4 from the Roguelike Restoration Project (r1490)
elwin
parents:
diff changeset
9 *
f502bf60e6e4 Import Rogue 5.4 from the Roguelike Restoration Project (r1490)
elwin
parents:
diff changeset
10 * See the file LICENSE.TXT for full copyright and licensing information.
f502bf60e6e4 Import Rogue 5.4 from the Roguelike Restoration Project (r1490)
elwin
parents:
diff changeset
11 */
f502bf60e6e4 Import Rogue 5.4 from the Roguelike Restoration Project (r1490)
elwin
parents:
diff changeset
12 #include <stdio.h>
f502bf60e6e4 Import Rogue 5.4 from the Roguelike Restoration Project (r1490)
elwin
parents:
diff changeset
13
f502bf60e6e4 Import Rogue 5.4 from the Roguelike Restoration Project (r1490)
elwin
parents:
diff changeset
14 main(int argc, char *argv[])
f502bf60e6e4 Import Rogue 5.4 from the Roguelike Restoration Project (r1490)
elwin
parents:
diff changeset
15 {
f502bf60e6e4 Import Rogue 5.4 from the Roguelike Restoration Project (r1490)
elwin
parents:
diff changeset
16 char buf[80];
f502bf60e6e4 Import Rogue 5.4 from the Roguelike Restoration Project (r1490)
elwin
parents:
diff changeset
17
f502bf60e6e4 Import Rogue 5.4 from the Roguelike Restoration Project (r1490)
elwin
parents:
diff changeset
18 fprintf(stderr, "Password: ");
f502bf60e6e4 Import Rogue 5.4 from the Roguelike Restoration Project (r1490)
elwin
parents:
diff changeset
19 (void) fgets(buf, 80, stdin);
f502bf60e6e4 Import Rogue 5.4 from the Roguelike Restoration Project (r1490)
elwin
parents:
diff changeset
20 buf[strlen(buf) - 1] = '\0';
f502bf60e6e4 Import Rogue 5.4 from the Roguelike Restoration Project (r1490)
elwin
parents:
diff changeset
21 printf("%s\n", xcrypt(buf, "mT"));
f502bf60e6e4 Import Rogue 5.4 from the Roguelike Restoration Project (r1490)
elwin
parents:
diff changeset
22 }