wpa_passphrase.c revision 189251 
1/*
2 * WPA Supplicant - ASCII passphrase to WPA PSK tool
3 * Copyright (c) 2003-2005, Jouni Malinen <j@w1.fi>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
8 *
9 * Alternatively, this software may be distributed under the terms of BSD
10 * license.
11 *
12 * See README and COPYING for more details.
13 */
14
15#include "includes.h"
16
17#include "common.h"
18#include "sha1.h"
19
20
21int main(int argc, char *argv[])
22{
23	unsigned char psk[32];
24	int i;
25	char *ssid, *passphrase, buf[64], *pos;
26
27	if (argc < 2) {
28		printf("usage: wpa_passphrase <ssid> [passphrase]\n"
29			"\nIf passphrase is left out, it will be read from "
30			"stdin\n");
31		return 1;
32	}
33
34	ssid = argv[1];
35
36	if (argc > 2) {
37		passphrase = argv[2];
38	} else {
39		printf("# reading passphrase from stdin\n");
40		if (fgets(buf, sizeof(buf), stdin) == NULL) {
41			printf("Failed to read passphrase\n");
42			return 1;
43		}
44		buf[sizeof(buf) - 1] = '\0';
45		pos = buf;
46		while (*pos != '\0') {
47			if (*pos == '\r' || *pos == '\n') {
48				*pos = '\0';
49				break;
50			}
51			pos++;
52		}
53		passphrase = buf;
54	}
55
56	if (os_strlen(passphrase) < 8 || os_strlen(passphrase) > 63) {
57		printf("Passphrase must be 8..63 characters\n");
58		return 1;
59	}
60
61	pbkdf2_sha1(passphrase, ssid, os_strlen(ssid), 4096, psk, 32);
62
63	printf("network={\n");
64	printf("\tssid=\"%s\"\n", ssid);
65	printf("\t#psk=\"%s\"\n", passphrase);
66	printf("\tpsk=");
67	for (i = 0; i < 32; i++)
68		printf("%02x", psk[i]);
69	printf("\n");
70	printf("}\n");
71
72	return 0;
73}
74