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iwd
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eap-wsc: Add utility to check KeyWrapAuthenticator

This commit is contained in:
Denis Kenzior 2016-08-30 14:42:43 -05:00
parent 046c7b8994
commit b78bef2be8
1 changed files with 16 additions and 0 deletions
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16
src/eap-wsc.c
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@ -118,6 +118,22 @@ static inline void authenticator_put(struct eap_wsc_state *wsc,
l_checksum_get_digest(wsc->hmac_auth_key, cur_msg + cur_msg_len - 8, 8);
}
static inline bool keywrap_authenticator_check(struct eap_wsc_state *wsc,
const uint8_t *pdu, size_t len)
{
uint8_t authenticator[8];
/* We omit the included KeyWrapAuthenticator element from the hash */
l_checksum_update(wsc->hmac_auth_key, pdu, len - 12);
l_checksum_get_digest(wsc->hmac_auth_key, authenticator, 8);
/* KeyWrapAuthenticator is the last 8 bytes of the message */
if (memcmp(authenticator, pdu + len - 8, 8))
return false;
return true;
}
static int eap_wsc_probe(struct eap_state *eap, const char *name)
{
struct eap_wsc_state *wsc;