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 
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