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wscutil: Add wsc_parse_m8_encrypted_settings

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This commit is contained in:
Denis Kenzior 2016-08-31 21:59:52 -05:00
parent fa8cbeea7c
commit d83bf50a39
2 changed files with 101 additions and 0 deletions
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91
src/wscutil.c
View File

@ -361,6 +361,21 @@ static bool extract_model_number(struct wsc_attr_iter *iter, void *data)
return extract_ascii_string(iter, data, 32);
}
static bool extract_new_password(struct wsc_attr_iter *iter, void *data)
{
struct iovec *new_password = data;
unsigned int len;
len = wsc_attr_iter_get_length(iter);
if (len > 64)
return false;
new_password->iov_len = len;
new_password->iov_base = (void *) wsc_attr_iter_get_data(iter);
return true;
}
static bool extract_os_version(struct wsc_attr_iter *iter, void *data)
{
uint32_t v;
@ -530,6 +545,8 @@ static attr_handler handler_for_type(enum wsc_attr type)
return extract_model_name;
case WSC_ATTR_MODEL_NUMBER:
return extract_model_number;
case WSC_ATTR_NEW_PASSWORD:
return extract_new_password;
case WSC_ATTR_OS_VERSION:
return extract_os_version;
case WSC_ATTR_PUBLIC_KEY:
@ -1306,6 +1323,80 @@ int wsc_parse_m8(const uint8_t *pdu, uint32_t len, struct wsc_m8 *out,
return 0;
}
int wsc_parse_m8_encrypted_settings(const uint8_t *pdu, uint32_t len,
struct wsc_m8_encrypted_settings *out,
struct iovec *iov, size_t *iovcnt)
{
struct wsc_attr_iter iter;
size_t n_cred = 0;
memset(out, 0, sizeof(*out));
wsc_attr_iter_init(&iter, pdu, len);
if (!wsc_attr_iter_next(&iter))
return -EBADMSG;
while (wsc_attr_iter_get_type(&iter) == WSC_ATTR_CREDENTIAL) {
if (n_cred < *iovcnt) {
iov[n_cred].iov_base =
(void *) wsc_attr_iter_get_data(&iter);
iov[n_cred].iov_len = wsc_attr_iter_get_length(&iter);
n_cred += 1;
}
if (!wsc_attr_iter_next(&iter))
return -EBADMSG;
}
/* At least one Credential element is required */
if (!n_cred)
return -EBADMSG;
if (wsc_attr_iter_get_type(&iter) == WSC_ATTR_NEW_PASSWORD) {
struct iovec np;
if (!extract_new_password(&iter, &np))
return -EBADMSG;
memcpy(out->new_password, np.iov_base, np.iov_len);
out->new_password_len = np.iov_len;
if (!wsc_attr_iter_next(&iter))
return -EBADMSG;
/*
* According to WSC 2.0.5, Table 21, Device Password ID is
* "Required if New Password is included."
*/
if (wsc_attr_iter_get_type(&iter) !=
WSC_ATTR_DEVICE_PASSWORD_ID)
return -EBADMSG;
}
if (wsc_attr_iter_get_type(&iter) == WSC_ATTR_DEVICE_PASSWORD_ID) {
extract_device_password_id(&iter, &out->device_password_id);
if (!wsc_attr_iter_next(&iter))
return -EBADMSG;
}
while (wsc_attr_iter_get_type(&iter) !=
WSC_ATTR_KEY_WRAP_AUTHENTICATOR) {
if (!wsc_attr_iter_next(&iter))
return -EBADMSG;
}
if (!extract_authenticator(&iter, &out->authenticator))
return -EBADMSG;
if (wsc_attr_iter_get_pos(&iter) != len)
return -EBADMSG;
*iovcnt = n_cred;
return 0;
}
int wsc_parse_nack(const uint8_t *pdu, uint32_t len, struct wsc_nack *out)
{
int r;

10
src/wscutil.h
View File

@ -498,6 +498,13 @@ struct wsc_m8 {
uint8_t authenticator[8];
};
struct wsc_m8_encrypted_settings {
uint8_t new_password[64];
uint8_t new_password_len;
enum wsc_device_password_id device_password_id;
uint8_t authenticator[8];
};
struct wsc_nack {
bool version2;
uint8_t enrollee_nonce[16];
@ -533,6 +540,9 @@ int wsc_parse_m7_encrypted_settings(const uint8_t *pdu, uint32_t len,
struct wsc_m7_encrypted_settings *out);
int wsc_parse_m8(const uint8_t *pdu, uint32_t len, struct wsc_m8 *out,
struct iovec *out_encrypted);
int wsc_parse_m8_encrypted_settings(const uint8_t *pdu, uint32_t len,
struct wsc_m8_encrypted_settings *out,
struct iovec *iov, size_t *iovcnt);
int wsc_parse_nack(const uint8_t *pdu, uint32_t len, struct wsc_nack *out);