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RRTcodebaseC

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* - DC_QR_ASK_VERIFYCONTACT with dc_lot_t::id=Contact ID
* - DC_QR_ASK_VERIFYGROUP withdc_lot_t::text1=Group name
* - DC_QR_FPR_OK with dc_lot_t::id=Contact ID
* - DC_QR_FPR_MISMATCH with dc_lot_t::id=Contact ID
* - DC_QR_FPR_WITHOUT_ADDR with dc_lot_t::test1=Formatted fingerprint
* - DC_QR_ADDR with dc_lot_t::id=Contact ID
* - DC_QR_TEXT with dc_lot_t::text1=Text
* - DC_QR_URL with dc_lot_t::text1=URL
* - DC_QR_ERROR with dc_lot_t::text1=Error string
*
*
* @memberof dc_context_t
* @param context The context object.
* @param qr The text of the scanned QR code.
* @return Parsed QR code as an dc_lot_t object. The returned object must be
* freed using dc_lot_unref() after usage.
*/
dc_lot_t* dc_check_qr(dc_context_t* context, const char* qr)
{
char* payload = NULL;
char* addr = NULL; // must be normalized, if set
char* fingerprint = NULL; // must be normalized, if set
char* name = NULL;
char* invitenumber = NULL;
char* auth = NULL;
dc_apeerstate_t* peerstate = dc_apeerstate_new(context);
dc_lot_t* qr_parsed = dc_lot_new();
uint32_t chat_id = 0;
char* device_msg = NULL;
char* grpid = NULL;
char* grpname = NULL;
qr_parsed->state = 0;
if (context==NULL || context->magic!=DC_CONTEXT_MAGIC || qr==NULL) {
goto cleanup;
}
dc_log_info(context, 0, "Scanned QR code: %s", qr);
/* split parameters from the qr code
------------------------------------ */
if (strncasecmp(qr, DC_OPENPGP4FPR_SCHEME, strlen(DC_OPENPGP4FPR_SCHEME))==0)
{
/* scheme: OPENPGP4FPR:FINGERPRINT#a=ADDR&n=NAME&i=INVITENUMBER&s=AUTH
or: OPENPGP4FPR:FINGERPRINT#a=ADDR&g=GROUPNAME&x=GROUPID&i=INVITENUMBER&s=AUTH */
payload = dc_strdup(&qr[strlen(DC_OPENPGP4FPR_SCHEME)]);
char* fragment = strchr(payload, '#'); /* must not be freed, only a pointer inside payload */
if (fragment)
{
*fragment = 0;
fragment++;
dc_param_t* param = dc_param_new();
dc_param_set_urlencoded(param, fragment);
addr = dc_param_get(param, 'a', NULL);
if (addr) {
char* urlencoded = dc_param_get(param, 'n', NULL);
if(urlencoded) {
name = dc_urldecode(urlencoded);
dc_normalize_name(name);
free(urlencoded);
}
invitenumber = dc_param_get(param, 'i', NULL);
auth = dc_param_get(param, 's', NULL);
grpid = dc_param_get(param, 'x', NULL);
if (grpid) {
urlencoded = dc_param_get(param, 'g', NULL);
if (urlencoded) {
grpname = dc_urldecode(urlencoded);
free(urlencoded);
}
}
}
dc_param_unref(param);
}
fingerprint = dc_normalize_fingerprint(payload);
}
else if (strncasecmp(qr, MAILTO_SCHEME, strlen(MAILTO_SCHEME))==0)
{
/* scheme: mailto:addr...?subject=...&body=... */
payload = dc_strdup(&qr[strlen(MAILTO_SCHEME)]);
char* query = strchr(payload, '?'); /* must not be freed, only a pointer inside payload */
if (query) {
*query = 0;
}
addr = dc_strdup(payload);
}
else if (strncasecmp(qr, SMTP_SCHEME, strlen(SMTP_SCHEME))==0)
{
/* scheme: `SMTP:addr...:subject...:body...` */
payload = dc_strdup(&qr[strlen(SMTP_SCHEME)]);
char* colon = strchr(payload, ':'); /* must not be freed, only a pointer inside payload */