| 1 | /* |
| 2 | * Copyright (c) 2000-2002 |
| 3 | * Chris Adams <cmadams@iruntheinter.net> |
| 4 | * written for HiWAAY Internet Services |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to the Free Software |
| 18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 |
| 19 | * USA |
| 20 | */ |
| 21 | |
| 22 | /* |
| 23 | * Adapted for Exim by Tamas TEVESZ <ice@extreme.hu> |
| 24 | * Further adapted by Philip Hazel to cut out this function for operating |
| 25 | * systems that have a built-in version. |
| 26 | */ |
| 27 | |
| 28 | /* The OS has a built-in crypt16(). Some compilers don't like compiling empty |
| 29 | modules, so keep them happy with a dummy when skipping the rest. */ |
| 30 | |
| 31 | #include "config.h" |
| 32 | |
| 33 | #ifdef HAVE_CRYPT16 |
| 34 | static void dummy(int x) { dummy(x-1); } |
| 35 | #else |
| 36 | |
| 37 | /* The OS doesn't have a built-in crypt16(). Compile this one. */ |
| 38 | |
| 39 | #include <unistd.h> |
| 40 | #include <string.h> |
| 41 | #include "os.h" |
| 42 | |
| 43 | #ifdef CRYPT_H |
| 44 | #include <crypt.h> |
| 45 | #endif |
| 46 | |
| 47 | char *crypt16(char *key, char *salt) |
| 48 | { |
| 49 | static char res[25]; |
| 50 | static char s2[3]; |
| 51 | char *p; |
| 52 | |
| 53 | /* Clear the string of any previous data */ |
| 54 | memset (res, 0, sizeof (res)); |
| 55 | |
| 56 | /* crypt the first part */ |
| 57 | p = crypt (key, salt); |
| 58 | strncpy (res, p, 13); |
| 59 | |
| 60 | if (strlen (key) > 8) |
| 61 | { |
| 62 | /* crypt the rest |
| 63 | * the first two characters of the first block (not counting |
| 64 | * the salt) make up the new salt */ |
| 65 | strncpy (s2, &(res[2]), 2); |
| 66 | p = crypt (&(key[8]), s2); |
| 67 | strncpy (&(res[13]), &(p[2]), 11); |
| 68 | memset (s2, 0, sizeof (s2)); |
| 69 | } |
| 70 | |
| 71 | return (res); |
| 72 | } |
| 73 | #endif |
| 74 | |
| 75 | /* End of crypt16.c */ |