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
main(int argc,char * argv[])21 int 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