Home | History | Annotate | Download | only in wpa_supplicant
      1 /*
      2  * WPA Supplicant - ASCII passphrase to WPA PSK tool
      3  * Copyright (c) 2003-2005, Jouni Malinen <j (at) 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