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wscutil: Add M3 parser

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This commit is contained in:
Denis Kenzior 2016-08-18 17:48:04 -05:00
parent dc310bfc49
commit b6e7b7a4d6
2 changed files with 35 additions and 0 deletions
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26
src/wscutil.c
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@ -1065,6 +1065,32 @@ int wsc_parse_m2(const uint8_t *pdu, uint32_t len, struct wsc_m2 *out)
return 0;
}
int wsc_parse_m3(const uint8_t *pdu, uint32_t len, struct wsc_m3 *out)
{
int r;
struct wsc_wfa_ext_iter iter;
uint8_t version;
enum wsc_message_type msg_type;
memset(out, 0, sizeof(struct wsc_m3));
r = wsc_parse_attrs(pdu, len, &out->version2, &iter, out->authenticator,
REQUIRED(VERSION, &version),
REQUIRED(MESSAGE_TYPE, &msg_type),
REQUIRED(REGISTRAR_NONCE, &out->registrar_nonce),
REQUIRED(E_HASH1, &out->e_hash1),
REQUIRED(E_HASH2, &out->e_hash2),
WSC_ATTR_INVALID);
if (r < 0)
return r;
if (msg_type != WSC_MESSAGE_TYPE_M3)
return -EBADMSG;
return 0;
}
struct wsc_attr_builder {
size_t capacity;
uint8_t *buf;

9
src/wscutil.h
View File

@ -429,6 +429,14 @@ struct wsc_m2 {
uint8_t authenticator[8];
};
struct wsc_m3 {
bool version2;
uint8_t registrar_nonce[16];
uint8_t e_hash1[32];
uint8_t e_hash2[32];
uint8_t authenticator[8];
};
int wsc_parse_beacon(const unsigned char *pdu, unsigned int len,
struct wsc_beacon *out);
int wsc_parse_probe_response(const unsigned char *pdu, unsigned int len,
@ -438,6 +446,7 @@ int wsc_parse_probe_request(const unsigned char *pdu, unsigned int len,
int wsc_parse_m1(const uint8_t *pdu, uint32_t len, struct wsc_m1 *out);
int wsc_parse_m2(const uint8_t *pdu, uint32_t len, struct wsc_m2 *out);
int wsc_parse_m3(const uint8_t *pdu, uint32_t len, struct wsc_m3 *out);
uint8_t *wsc_build_probe_request(const struct wsc_probe_request *probe_request,
size_t *out_len);