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eap: Fix Expanded Nak processing

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Expanded Nak packet contains (possibly multiple) 8 byte chunks that
contain the type (1 byte, always '254') vendor-id (3 bytes) and
vendor-type (4) bytes.

Unfortunately the current logic was reading the vendor-id at the wrong
offset (0 instead of 1) and so the extracted vendor-type was incorrect.

Fixes: 17c569ba4cdd ("eap: Add authenticator method logic and API")
This commit is contained in:
Denis Kenzior 2021-03-09 18:28:42 -06:00
parent 28e58887ec
commit a483ec7b68
1 changed files with 4 additions and 3 deletions
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7
src/eap.c
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@ -442,12 +442,13 @@ static void eap_handle_response(struct eap_state *eap, const uint8_t *pkt,
} }
else else
while (len >= 8) { while (len >= 8) {
uint32_t v_id = (pkt[0] << 16) | (pkt[1] << 8) | uint32_t v_id = (pkt[1] << 16) |
pkt[2]; (pkt[2] << 8) |
pkt[3];
l_debug("EAP peer proposed method: %s", l_debug("EAP peer proposed method: %s",
eap_type_to_str(pkt[0], v_id, eap_type_to_str(pkt[0], v_id,
l_get_be32(pkt + 3))); l_get_be32(pkt + 4)));
pkt += 8; pkt += 8;
len -= 8; len -= 8;
} }