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DPP2: Add parsing of ssid64/ssid_charset in Config Object

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The discovery object is now allowed to use either the UTF-8 encoded
string ssid or base64url encoded ssid64.

Signed-off-by: Jouni Malinen <jouni@codeaurora.org>
This commit is contained in:
Jouni Malinen 2019-11-28 15:20:32 +02:00 committed by Jouni Malinen
parent 590bc64d65
commit 57a63b1318
2 changed files with 41 additions and 14 deletions
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54
src/common/dpp.c
View file

@ -6128,6 +6128,7 @@ static int dpp_parse_conf_obj(struct dpp_authentication *auth,
int ret = -1;
struct json_token *root, *token, *discovery, *cred;
struct dpp_config_obj *conf;
struct wpabuf *ssid64 = NULL;
root = json_parse((const char *) conf_obj, conf_obj_len);
if (!root)
@ -6155,28 +6156,52 @@ static int dpp_parse_conf_obj(struct dpp_authentication *auth,
goto fail;
}
token = json_get_member(discovery, "ssid");
if (!token || token->type != JSON_STRING) {
dpp_auth_fail(auth, "No discovery::ssid string value found");
goto fail;
}
wpa_hexdump_ascii(MSG_DEBUG, "DPP: discovery::ssid",
token->string, os_strlen(token->string));
if (os_strlen(token->string) > SSID_MAX_LEN) {
dpp_auth_fail(auth, "Too long discovery::ssid string value");
goto fail;
ssid64 = json_get_member_base64url(discovery, "ssid64");
if (ssid64) {
wpa_hexdump_ascii(MSG_DEBUG, "DPP: discovery::ssid64",
wpabuf_head(ssid64), wpabuf_len(ssid64));
if (wpabuf_len(ssid64) > SSID_MAX_LEN) {
dpp_auth_fail(auth, "Too long discovery::ssid64 value");
goto fail;
}
} else {
token = json_get_member(discovery, "ssid");
if (!token || token->type != JSON_STRING) {
dpp_auth_fail(auth,
"No discovery::ssid string value found");
goto fail;
}
wpa_hexdump_ascii(MSG_DEBUG, "DPP: discovery::ssid",
token->string, os_strlen(token->string));
if (os_strlen(token->string) > SSID_MAX_LEN) {
dpp_auth_fail(auth,
"Too long discovery::ssid string value");
goto fail;
}
}
if (auth->num_conf_obj == DPP_MAX_CONF_OBJ) {
wpa_printf(MSG_DEBUG,
"DPP: No room for this many Config Objects - ignore this one");
json_free(root);
return 0;
ret = 0;
goto fail;
}
conf = &auth->conf_obj[auth->num_conf_obj++];
conf->ssid_len = os_strlen(token->string);
os_memcpy(conf->ssid, token->string, conf->ssid_len);
if (ssid64) {
conf->ssid_len = wpabuf_len(ssid64);
os_memcpy(conf->ssid, wpabuf_head(ssid64), conf->ssid_len);
} else {
conf->ssid_len = os_strlen(token->string);
os_memcpy(conf->ssid, token->string, conf->ssid_len);
}
token = json_get_member(discovery, "ssid_charset");
if (token && token->type == JSON_NUMBER) {
conf->ssid_charset = token->number;
wpa_printf(MSG_DEBUG, "DPP: ssid_charset=%d",
conf->ssid_charset);
}
cred = json_get_member(root, "cred");
if (!cred || cred->type != JSON_OBJECT) {
@ -6207,6 +6232,7 @@ static int dpp_parse_conf_obj(struct dpp_authentication *auth,
wpa_printf(MSG_DEBUG, "DPP: JSON parsing completed successfully");
ret = 0;
fail:
wpabuf_free(ssid64);
json_free(root);
return ret;
}

1
src/common/dpp.h
View file

@ -247,6 +247,7 @@ struct dpp_authentication {
char *connector; /* received signedConnector */
u8 ssid[SSID_MAX_LEN];
u8 ssid_len;
int ssid_charset;
char passphrase[64];
u8 psk[PMK_LEN];
int psk_set;