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handshake: Add GTK data to handshake_state

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Add places to store the GTK data, index and RSC in struct
handshake_state and add a setter function for these fields.  We may want
to also convert install_gtk to use these fields similar to install_ptk.
This commit is contained in:
Andrew Zaborowski 2018-09-22 18:48:14 +02:00 committed by Denis Kenzior
parent 7eb59602df
commit 68e612573e
2 changed files with 21 additions and 0 deletions
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15
src/handshake.c
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@ -445,6 +445,21 @@ bool handshake_state_get_pmkid(struct handshake_state *s, uint8_t *out_pmkid)
use_sha256);
}
void handshake_state_set_gtk(struct handshake_state *s, const uint8_t *key,
unsigned int key_index, const uint8_t *rsc)
{
enum crypto_cipher cipher =
ie_rsn_cipher_suite_to_cipher(s->group_cipher);
int key_len = crypto_cipher_key_len(cipher);
if (!key_len)
return;
memcpy(s->gtk, key, key_len);
s->gtk_index = key_index;
memcpy(s->gtk_rsc, rsc, 6);
}
/*
* This function performs a match of the RSN/WPA IE obtained from the scan
* results vs the RSN/WPA IE obtained as part of the 4-way handshake. If they

6
src/handshake.h
View File

@ -109,6 +109,9 @@ struct handshake_state {
uint8_t r0khid[48];
size_t r0khid_len;
uint8_t r1khid[6];
uint8_t gtk[32];
uint8_t gtk_rsc[6];
unsigned int gtk_index;
void *user_data;
void (*free)(struct handshake_state *s);
@ -179,6 +182,9 @@ bool handshake_state_get_pmkid(struct handshake_state *s, uint8_t *out_pmkid);
bool handshake_decode_fte_key(struct handshake_state *s, const uint8_t *wrapped,
size_t key_len, uint8_t *key_out);
void handshake_state_set_gtk(struct handshake_state *s, const uint8_t *key,
unsigned int key_index, const uint8_t *rsc);
bool handshake_util_ap_ie_matches(const uint8_t *msg_ie,
const uint8_t *scan_ie, bool is_wpa);