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wscutil: More strictly handle AUTHENTICATOR tlv

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This element must be the TLV in the message
This commit is contained in:
Denis Kenzior 2016-08-18 12:53:06 -05:00
parent f59f7564ce
commit af7224a973
1 changed files with 30 additions and 7 deletions
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37
src/wscutil.c
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@ -562,6 +562,7 @@ static bool verify_version2(struct wsc_wfa_ext_iter *ext_iter)
static int wsc_parse_attrs(const unsigned char *pdu, unsigned int len, static int wsc_parse_attrs(const unsigned char *pdu, unsigned int len,
bool *out_version2, bool *out_version2,
struct wsc_wfa_ext_iter *ext_iter, struct wsc_wfa_ext_iter *ext_iter,
uint8_t *authenticator,
enum wsc_attr type, ...) enum wsc_attr type, ...)
{ {
struct wsc_attr_iter iter; struct wsc_attr_iter iter;
@ -647,8 +648,31 @@ static int wsc_parse_attrs(const unsigned char *pdu, unsigned int len,
for (; e; e = e->next) { for (; e; e = e->next) {
struct attr_handler_entry *entry = e->data; struct attr_handler_entry *entry = e->data;
if (entry->flags & ATTR_FLAG_REQUIRED) if (entry->flags & ATTR_FLAG_REQUIRED) {
parse_error = true; parse_error = true;
goto done;
}
}
/* Authenticator element must be the last element */
if (authenticator) {
while (wsc_attr_iter_get_type(&iter) !=
WSC_ATTR_AUTHENTICATOR) {
if (!wsc_attr_iter_next(&iter)) {
have_required = false;
goto done;
}
}
if (!extract_authenticator(&iter, authenticator)) {
parse_error = true;
goto done;
}
if (wsc_attr_iter_next(&iter) != false) {
parse_error = true;
goto done;
}
} }
/* /*
@ -771,7 +795,7 @@ int wsc_parse_beacon(const unsigned char *pdu, unsigned int len,
memset(out, 0, sizeof(struct wsc_beacon)); memset(out, 0, sizeof(struct wsc_beacon));
r = wsc_parse_attrs(pdu, len, &out->version2, &iter, r = wsc_parse_attrs(pdu, len, &out->version2, &iter, NULL,
REQUIRED(VERSION, &version), REQUIRED(VERSION, &version),
REQUIRED(WSC_STATE, &out->state), REQUIRED(WSC_STATE, &out->state),
OPTIONAL(AP_SETUP_LOCKED, &out->ap_setup_locked), OPTIONAL(AP_SETUP_LOCKED, &out->ap_setup_locked),
@ -823,7 +847,7 @@ int wsc_parse_probe_response(const unsigned char *pdu, unsigned int len,
memset(out, 0, sizeof(struct wsc_probe_response)); memset(out, 0, sizeof(struct wsc_probe_response));
r = wsc_parse_attrs(pdu, len, &out->version2, &iter, r = wsc_parse_attrs(pdu, len, &out->version2, &iter, NULL,
REQUIRED(VERSION, &version), REQUIRED(VERSION, &version),
REQUIRED(WSC_STATE, &out->state), REQUIRED(WSC_STATE, &out->state),
OPTIONAL(AP_SETUP_LOCKED, &out->ap_setup_locked), OPTIONAL(AP_SETUP_LOCKED, &out->ap_setup_locked),
@ -883,7 +907,7 @@ int wsc_parse_probe_request(const unsigned char *pdu, unsigned int len,
memset(out, 0, sizeof(struct wsc_probe_request)); memset(out, 0, sizeof(struct wsc_probe_request));
r = wsc_parse_attrs(pdu, len, &out->version2, &iter, r = wsc_parse_attrs(pdu, len, &out->version2, &iter, NULL,
REQUIRED(VERSION, &version), REQUIRED(VERSION, &version),
REQUIRED(REQUEST_TYPE, &out->request_type), REQUIRED(REQUEST_TYPE, &out->request_type),
REQUIRED(CONFIGURATION_METHODS, &out->config_methods), REQUIRED(CONFIGURATION_METHODS, &out->config_methods),
@ -930,7 +954,7 @@ int wsc_parse_m1(const uint8_t *pdu, uint32_t len, struct wsc_m1 *out)
memset(out, 0, sizeof(struct wsc_m1)); memset(out, 0, sizeof(struct wsc_m1));
r = wsc_parse_attrs(pdu, len, &out->version2, &iter, r = wsc_parse_attrs(pdu, len, &out->version2, &iter, NULL,
REQUIRED(VERSION, &version), REQUIRED(VERSION, &version),
REQUIRED(MESSAGE_TYPE, &msg_type), REQUIRED(MESSAGE_TYPE, &msg_type),
REQUIRED(UUID_E, &out->uuid_e), REQUIRED(UUID_E, &out->uuid_e),
@ -992,7 +1016,7 @@ int wsc_parse_m2(const uint8_t *pdu, uint32_t len, struct wsc_m2 *out)
memset(out, 0, sizeof(struct wsc_m1)); memset(out, 0, sizeof(struct wsc_m1));
r = wsc_parse_attrs(pdu, len, &out->version2, &iter, r = wsc_parse_attrs(pdu, len, &out->version2, &iter, out->authenticator,
REQUIRED(VERSION, &version), REQUIRED(VERSION, &version),
REQUIRED(MESSAGE_TYPE, &msg_type), REQUIRED(MESSAGE_TYPE, &msg_type),
REQUIRED(ENROLLEE_NONCE, &out->enrollee_nonce), REQUIRED(ENROLLEE_NONCE, &out->enrollee_nonce),
@ -1014,7 +1038,6 @@ int wsc_parse_m2(const uint8_t *pdu, uint32_t len, struct wsc_m2 *out)
REQUIRED(CONFIGURATION_ERROR, &out->configuration_error), REQUIRED(CONFIGURATION_ERROR, &out->configuration_error),
REQUIRED(DEVICE_PASSWORD_ID, &out->device_password_id), REQUIRED(DEVICE_PASSWORD_ID, &out->device_password_id),
REQUIRED(OS_VERSION, &out->os_version), REQUIRED(OS_VERSION, &out->os_version),
REQUIRED(AUTHENTICATOR, &out->authenticator),
WSC_ATTR_INVALID); WSC_ATTR_INVALID);
if (r < 0) if (r < 0)