1 /*
2  * WPA Supplicant - ASCII passphrase to WPA PSK tool
3  * Copyright (c) 2003-2005, Jouni Malinen <j@w1.fi>
4  *
5  * This software may be distributed under the terms of the BSD license.
6  * See README for more details.
7  */
8 
9 #include "includes.h"
10 
11 #include "common.h"
12 #include "crypto/sha1.h"
13 
14 
15 int main(int argc, char *argv[])
16 {
17 	unsigned char psk[32];
18 	int i;
19 	char *ssid, *passphrase, buf[64], *pos;
20 
21 	if (argc < 2) {
22 		printf("usage: wpa_passphrase <ssid> [passphrase]\n"
23 			"\nIf passphrase is left out, it will be read from "
24 			"stdin\n");
25 		return 1;
26 	}
27 
28 	ssid = argv[1];
29 
30 	if (argc > 2) {
31 		passphrase = argv[2];
32 	} else {
33 		printf("# reading passphrase from stdin\n");
34 		if (fgets(buf, sizeof(buf), stdin) == NULL) {
35 			printf("Failed to read passphrase\n");
36 			return 1;
37 		}
38 		buf[sizeof(buf) - 1] = '\0';
39 		pos = buf;
40 		while (*pos != '\0') {
41 			if (*pos == '\r' || *pos == '\n') {
42 				*pos = '\0';
43 				break;
44 			}
45 			pos++;
46 		}
47 		passphrase = buf;
48 	}
49 
50 	if (os_strlen(passphrase) < 8 || os_strlen(passphrase) > 63) {
51 		printf("Passphrase must be 8..63 characters\n");
52 		return 1;
53 	}
54 
55 	pbkdf2_sha1(passphrase, (u8 *) ssid, os_strlen(ssid), 4096, psk, 32);
56 
57 	printf("network={\n");
58 	printf("\tssid=\"%s\"\n", ssid);
59 	printf("\t#psk=\"%s\"\n", passphrase);
60 	printf("\tpsk=");
61 	for (i = 0; i < 32; i++)
62 		printf("%02x", psk[i]);
63 	printf("\n");
64 	printf("}\n");
65 
66 	return 0;
67 }
68