hostap/wpa_supplicant/wpa_passphrase.c

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/*
* WPA Supplicant - ASCII passphrase to WPA PSK tool
* Copyright (c) 2003-2005, Jouni Malinen <j@w1.fi>
*
* This software may be distributed under the terms of the BSD license.
* See README for more details.
*/
#include "includes.h"
#include "common.h"
#include "crypto/sha1.h"
int main(int argc, char *argv[])
{
unsigned char psk[32];
int i;
char *ssid, *passphrase, buf[64], *pos;
size_t len;
if (argc < 2) {
printf("usage: wpa_passphrase <ssid> [passphrase]\n"
"\nIf passphrase is left out, it will be read from "
"stdin\n");
return 1;
}
ssid = argv[1];
if (argc > 2) {
passphrase = argv[2];
} else {
fprintf(stderr, "# reading passphrase from stdin\n");
if (fgets(buf, sizeof(buf), stdin) == NULL) {
fprintf(stderr, "Failed to read passphrase\n");
return 1;
}
buf[sizeof(buf) - 1] = '\0';
pos = buf;
while (*pos != '\0') {
if (*pos == '\r' || *pos == '\n') {
*pos = '\0';
break;
}
pos++;
}
passphrase = buf;
}
len = os_strlen(passphrase);
if (len < 8 || len > 63) {
fprintf(stderr, "Passphrase must be 8..63 characters\n");
return 1;
}
if (has_ctrl_char((u8 *) passphrase, len)) {
fprintf(stderr, "Invalid passphrase character\n");
return 1;
}
pbkdf2_sha1(passphrase, (u8 *) ssid, os_strlen(ssid), 4096, psk, 32);
printf("network={\n");
printf("\tssid=\"%s\"\n", ssid);
printf("\t#psk=\"%s\"\n", passphrase);
printf("\tpsk=");
for (i = 0; i < 32; i++)
printf("%02x", psk[i]);
printf("\n");
printf("}\n");
return 0;
}