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/********************************************************************\
* BitlBee -- An IRC to other IM-networks gateway *
* *
* Copyright 2002-2004 Sjoerd Hemminga and others *
\********************************************************************/
/* A little bit of encryption for the users' passwords */
/*
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License with
the Debian GNU/Linux distribution in /usr/share/common-licenses/GPL;
if not, write to the Free Software Foundation, Inc., 59 Temple Place,
Suite 330, Boston, MA 02111-1307 USA
*/
/* [WvG] This file can also be compiled into a stand-alone program
which can encode/decode BitlBee account files. The main() will be
included if CRYPTING_MAIN is defined. Or just do "make decode" and
the programs will be built. */
#include <bitlbee.h>
#include "md5.h"
#include "crypting.h"
/*\
* [SH] Do _not_ call this if it's not entirely sure that it will not cause
* harm to another users file, since this does not check the password for
* correctness.
\*/
int checkpass (const char *pass, const char *md5sum)
{
md5_state_t md5state;
md5_byte_t digest[16];
int i, j;
char digits[3];
md5_init (&md5state);
md5_append (&md5state, (unsigned char *)pass, strlen (pass));
md5_finish (&md5state, digest);
for (i = 0, j = 0; i < 16; i++, j += 2) {
/* Check password for correctness */
g_snprintf (digits, sizeof (digits), "%02x\n", digest[i]);
if (digits[0] != md5sum[j]) return (-1);
if (digits[1] != md5sum[j + 1]) return (-1);
}
return( 0 );
}
char *hashpass (const char *password)
{
md5_state_t md5state;
md5_byte_t digest[16];
int i;
char digits[3];
char *rv;
if (password == NULL) return (NULL);
rv = g_new0 (char, 33);
md5_init (&md5state);
md5_append (&md5state, (const unsigned char *)password, strlen (password));
md5_finish (&md5state, digest);
for (i = 0; i < 16; i++) {
/* Build a hash of the pass */
g_snprintf (digits, sizeof (digits), "%02x", digest[i]);
strcat (rv, digits);
}
return (rv);
}
char *obfucrypt (char *line, const char *password)
{
int i, j;
char *rv;
if (password == NULL) return (NULL);
rv = g_new0 (char, strlen (line) + 1);
i = j = 0;
while (*line) {
/* Encrypt/obfuscate the line, using the password */
if (*(signed char*)line < 0) *line = - (*line);
rv[j] = *line + password[i]; /* Overflow intended */
line++;
if (!password[++i]) i = 0;
j++;
}
return (rv);
}
char *deobfucrypt (char *line, const char *password)
{
int i, j;
char *rv;
if (password == NULL) return (NULL);
rv = g_new0 (char, strlen (line) + 1);
i = j = 0;
while (*line) {
/* Decrypt/deobfuscate the line, using the pass */
rv[j] = *line - password[i]; /* Overflow intended */
line++;
if (!password[++i]) i = 0;
j++;
}
return (rv);
}
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