mirror of
https://github.com/NishiOwO/ircservices5.git
synced 2025-04-21 16:54:38 +00:00
125 lines
3.1 KiB
C
125 lines
3.1 KiB
C
/* Module for encryption using the Unix crypt() function.
|
|
*
|
|
* IRC Services is copyright (c) 1996-2009 Andrew Church.
|
|
* E-mail: <achurch@achurch.org>
|
|
* Parts written by Andrew Kempe and others.
|
|
* This program is free but copyrighted software; see the file GPL.txt for
|
|
* details.
|
|
*/
|
|
|
|
#include "services.h"
|
|
#include "modules.h"
|
|
#include "conffile.h"
|
|
#include "encrypt.h"
|
|
|
|
#if !HAVE_CRYPT
|
|
# define crypt(pass,salt) NULL
|
|
#endif
|
|
|
|
/*************************************************************************/
|
|
|
|
/* Allowable characters in the salt */
|
|
const char saltchars[] =
|
|
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789./";
|
|
|
|
/*************************************************************************/
|
|
/*************************************************************************/
|
|
|
|
static int unixcrypt_encrypt(const char *src, int len, char *dest, int size)
|
|
{
|
|
char buf[PASSMAX+1], salt[3];
|
|
const char *res;
|
|
|
|
if (len > sizeof(buf)-1)
|
|
len = sizeof(buf)-1;
|
|
memcpy(buf, src, len);
|
|
buf[len] = 0;
|
|
salt[0] = saltchars[random()%64];
|
|
salt[1] = saltchars[random()%64];
|
|
salt[2] = 0;
|
|
res = crypt(buf, salt);
|
|
if (!res) {
|
|
module_log_perror("encrypt: crypt() failed");
|
|
return -1;
|
|
}
|
|
if (strlen(res) > size-1) {
|
|
module_log("encrypt: crypt() returned too long a string! (%d"
|
|
" characters)", (int)strlen(res));
|
|
return strlen(res) + 1;
|
|
}
|
|
strscpy(dest, res, size);
|
|
return 0;
|
|
}
|
|
|
|
/*************************************************************************/
|
|
|
|
static int unixcrypt_decrypt(const char *src, char *dest, int size)
|
|
{
|
|
return -2; /* decryption impossible (in reasonable time) */
|
|
}
|
|
|
|
/*************************************************************************/
|
|
|
|
static int unixcrypt_check_password(const char *plaintext, const char *password)
|
|
{
|
|
const char *res;
|
|
|
|
res = crypt(plaintext, password);
|
|
if (!res) {
|
|
module_log_perror("check_password: crypt() failed");
|
|
return -1;
|
|
}
|
|
if (strcmp(res, password) == 0)
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
/*************************************************************************/
|
|
/*************************************************************************/
|
|
|
|
/* Module stuff. */
|
|
|
|
ConfigDirective module_config[] = {
|
|
{ NULL }
|
|
};
|
|
|
|
static CipherInfo unixcrypt_info = {
|
|
.name = "unix-crypt",
|
|
.encrypt = unixcrypt_encrypt,
|
|
.decrypt = unixcrypt_decrypt,
|
|
.check_password = unixcrypt_check_password,
|
|
};
|
|
|
|
int init_module(void)
|
|
{
|
|
#if !HAVE_CRYPT
|
|
module_log("Your system does not support the crypt() function!");
|
|
return 0;
|
|
#else
|
|
if (PASSMAX < 14) {
|
|
module_log("PASSMAX too small (must be at least 14)");
|
|
return 0;
|
|
}
|
|
register_cipher(&unixcrypt_info);
|
|
return 1;
|
|
#endif
|
|
}
|
|
|
|
int exit_module(int shutdown_unused)
|
|
{
|
|
unregister_cipher(&unixcrypt_info);
|
|
return 1;
|
|
}
|
|
|
|
/*************************************************************************/
|
|
|
|
/*
|
|
* Local variables:
|
|
* c-file-style: "stroustrup"
|
|
* c-file-offsets: ((case-label . *) (statement-case-intro . *))
|
|
* indent-tabs-mode: nil
|
|
* End:
|
|
*
|
|
* vim: expandtab shiftwidth=4:
|
|
*/
|