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
main(int argc,char * argv[])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