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wscutil: Add parser for M2 messages

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This commit is contained in:
Denis Kenzior 2016-08-17 21:57:50 -05:00
parent f389b2ffbc
commit 966f0a974f
2 changed files with 72 additions and 0 deletions
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47
src/wscutil.c
View File

@ -983,6 +983,53 @@ done:
return 0;
}
int wsc_parse_m2(const uint8_t *pdu, uint32_t len, struct wsc_m2 *out)
{
int r;
struct wsc_wfa_ext_iter iter;
uint8_t version;
enum wsc_message_type msg_type;
memset(out, 0, sizeof(struct wsc_m1));
r = wsc_parse_attrs(pdu, len, &out->version2, &iter,
REQUIRED(VERSION, &version),
REQUIRED(MESSAGE_TYPE, &msg_type),
REQUIRED(ENROLLEE_NONCE, &out->enrollee_nonce),
REQUIRED(REGISTRAR_NONCE, &out->registrar_nonce),
REQUIRED(UUID_R, &out->uuid_r),
REQUIRED(PUBLIC_KEY, &out->public_key),
REQUIRED(AUTHENTICATION_TYPE_FLAGS, &out->auth_type_flags),
REQUIRED(ENCRYPTION_TYPE_FLAGS, &out->encryption_type_flags),
REQUIRED(CONNECTION_TYPE_FLAGS, &out->connection_type_flags),
REQUIRED(CONFIGURATION_METHODS, &out->config_methods),
REQUIRED(MANUFACTURER, &out->manufacturer),
REQUIRED(MODEL_NAME, &out->model_name),
REQUIRED(MODEL_NUMBER, &out->model_number),
REQUIRED(SERIAL_NUMBER, &out->serial_number),
REQUIRED(PRIMARY_DEVICE_TYPE, &out->primary_device_type),
REQUIRED(DEVICE_NAME, &out->device_name),
REQUIRED(RF_BANDS, &out->rf_bands),
REQUIRED(ASSOCIATION_STATE, &out->association_state),
REQUIRED(CONFIGURATION_ERROR, &out->configuration_error),
REQUIRED(DEVICE_PASSWORD_ID, &out->device_password_id),
REQUIRED(OS_VERSION, &out->os_version),
REQUIRED(AUTHENTICATOR, &out->authenticator),
WSC_ATTR_INVALID);
if (r < 0)
return r;
if (msg_type != WSC_MESSAGE_TYPE_M2)
return -EBADMSG;
/* WSC 2.0.5, Section 8.3.2: "Specific RF band used for this message" */
if (__builtin_popcount(out->rf_bands) != 1)
return -EBADMSG;
return 0;
}
struct wsc_attr_builder {
size_t capacity;
uint8_t *buf;

25
src/wscutil.h
View File

@ -405,6 +405,30 @@ struct wsc_m1 {
bool request_to_enroll;
};
struct wsc_m2 {
bool version2;
uint8_t enrollee_nonce[16];
uint8_t registrar_nonce[16];
uint8_t uuid_r[16];
uint8_t public_key[192];
uint16_t auth_type_flags;
uint16_t encryption_type_flags;
uint8_t connection_type_flags;
uint16_t config_methods;
char manufacturer[65];
char model_name[33];
char model_number[33];
char serial_number[33];
struct wsc_primary_device_type primary_device_type;
char device_name[33];
uint8_t rf_bands;
enum wsc_association_state association_state;
enum wsc_configuration_error configuration_error;
enum wsc_device_password_id device_password_id;
uint32_t os_version;
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,
@ -413,6 +437,7 @@ int wsc_parse_probe_request(const unsigned char *pdu, unsigned int len,
struct wsc_probe_request *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);
uint8_t *wsc_build_probe_request(const struct wsc_probe_request *probe_request,
size_t *out_len);