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wscutil: Add M4 parser

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This commit is contained in:
Denis Kenzior 2016-08-19 15:04:06 -05:00
parent ca41b21e15
commit d3ee7c71be
2 changed files with 40 additions and 0 deletions
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28
src/wscutil.c
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@ -1106,6 +1106,34 @@ int wsc_parse_m3(const uint8_t *pdu, uint32_t len, struct wsc_m3 *out)
return 0; return 0;
} }
int wsc_parse_m4(const uint8_t *pdu, uint32_t len, struct wsc_m4 *out,
struct iovec *out_encrypted)
{
int r;
struct wsc_wfa_ext_iter iter;
uint8_t version;
enum wsc_message_type msg_type;
memset(out, 0, sizeof(struct wsc_m4));
r = wsc_parse_attrs(pdu, len, &out->version2, &iter, out->authenticator,
REQUIRED(VERSION, &version),
REQUIRED(MESSAGE_TYPE, &msg_type),
REQUIRED(ENROLLEE_NONCE, &out->enrollee_nonce),
REQUIRED(R_HASH1, &out->r_hash1),
REQUIRED(R_HASH2, &out->r_hash2),
REQUIRED(ENCRYPTED_SETTINGS, out_encrypted),
WSC_ATTR_INVALID);
if (r < 0)
return r;
if (msg_type != WSC_MESSAGE_TYPE_M4)
return -EBADMSG;
return 0;
}
struct wsc_attr_builder { struct wsc_attr_builder {
size_t capacity; size_t capacity;
uint8_t *buf; uint8_t *buf;

12
src/wscutil.h
View File

@ -20,6 +20,8 @@
* *
*/ */
struct iovec;
/* Wi-Fi Simple Configuration Technical Specification v2.0.5, Section 12 */ /* Wi-Fi Simple Configuration Technical Specification v2.0.5, Section 12 */
enum wsc_attr { enum wsc_attr {
WSC_ATTR_8021X_ENABLED = 0x1062, WSC_ATTR_8021X_ENABLED = 0x1062,
@ -437,6 +439,14 @@ struct wsc_m3 {
uint8_t authenticator[8]; uint8_t authenticator[8];
}; };
struct wsc_m4 {
bool version2;
uint8_t enrollee_nonce[16];
uint8_t r_hash1[32];
uint8_t r_hash2[32];
uint8_t authenticator[8];
};
int wsc_parse_beacon(const unsigned char *pdu, unsigned int len, int wsc_parse_beacon(const unsigned char *pdu, unsigned int len,
struct wsc_beacon *out); struct wsc_beacon *out);
int wsc_parse_probe_response(const unsigned char *pdu, unsigned int len, int wsc_parse_probe_response(const unsigned char *pdu, unsigned int len,
@ -447,6 +457,8 @@ 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_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_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); int wsc_parse_m3(const uint8_t *pdu, uint32_t len, struct wsc_m3 *out);
int wsc_parse_m4(const uint8_t *pdu, uint32_t len, struct wsc_m4 *out,
struct iovec *out_encrypted);
uint8_t *wsc_build_probe_request(const struct wsc_probe_request *probe_request, uint8_t *wsc_build_probe_request(const struct wsc_probe_request *probe_request,
size_t *out_len); size_t *out_len);