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 "crypto/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
