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