/**
* \brief Generate four 40 bit (5 byte) WEP subkeys from a string
* \param str Plaintext password
* \param keys Pointer to key buffer (at least 21 bytes long)
* \note Key locations: keys[0-4], keys[5-9], keys[10-14], keys[15-20].
* \ingroup wep
*/
void wep_keygen40(const gchar* str, guint8* keys)
{
gint val, i, shift;
// Seed is generated by xor'ing in the keystring bytes
// into the four bytes of the seed, starting at the little end
val = 0;
for (i = 0; str[i]; i++) {
shift = i & 0x3;
val ^= (str[i] << (shift * 8));
}
wep_seedkeygen(val, keys);
}
/*
* generate four subkeys from a string using the defacto standard
*
* resultant keys are stored in
* four 40 bit keys: keys[0-4], keys[5-9], keys[10-14] and keys[15-20]
*/
void
wep_keygen40(char *str, u_char *keys)
{
int val, i, shift;
/*
* seed is generated by xor'ing in the keystring bytes
* into the four bytes of the seed, starting at the little end
*/
val = 0;
for(i = 0; str[i]; i++) {
shift = i & 0x3;
val ^= (str[i] << (shift * 8));
}
wep_seedkeygen(val, keys);
return;
}
