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RRTcodebaseC

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chat_id_blocked = sqlite3_column_int(stmt, 1);
goto cleanup; /* success, chat found */
}
}
if (!allow_creation) {
goto cleanup;
}
/* we do not check if the message is a reply to another group, this may result in
chats with unclear member list. instead we create a new group in the following lines ... */
/* create a new ad-hoc group
- there is no need to check if this group exists; otherwise we would have catched it above */
if ((grpid = create_adhoc_grp_id(context, member_ids))==NULL) {
goto cleanup;
}
/* use subject as initial chat name */
if (mime_parser->subject && mime_parser->subject[0]) {
grpname = dc_strdup(mime_parser->subject);
}
else {
grpname = dc_stock_str_repl_int(context, DC_STR_MEMBER, dc_array_get_cnt(member_ids));
}
/* create group record */
chat_id = create_group_record(context, grpid, grpname, create_blocked, 0);
chat_id_blocked = create_blocked;
for (i = 0; i < dc_array_get_cnt(member_ids); i++) {
dc_add_to_chat_contacts_table(context, chat_id, dc_array_get_id(member_ids, i));
}
context->cb(context, DC_EVENT_CHAT_MODIFIED, chat_id, 0);
cleanup:
dc_array_unref(member_ids);
dc_array_unref(chat_ids);
free(chat_ids_str);
free(grpid);
free(grpname);
sqlite3_finalize(stmt);
sqlite3_free(q3);
if (ret_chat_id) { *ret_chat_id = chat_id; }
if (ret_chat_id_blocked) { *ret_chat_id_blocked = chat_id_blocked; }
}
static int check_verified_properties(dc_context_t* context, dc_mimeparser_t* mimeparser,
uint32_t from_id, const dc_array_t* to_ids,
char** failure_reason)
{
int everythings_okay = 0;
dc_contact_t* contact = dc_contact_new(context);
dc_apeerstate_t* peerstate = dc_apeerstate_new(context);
char* to_ids_str = NULL;
char* q3 = NULL;
sqlite3_stmt* stmt = NULL;
#define VERIFY_FAIL(a) \
*failure_reason = dc_mprintf("%s. See \"Info\" for details.", (a)); \
dc_log_warning(context, 0, *failure_reason);
if (!dc_contact_load_from_db(contact, context->sql, from_id)) {
VERIFY_FAIL("Internal Error; cannot load contact.")
goto cleanup;
}
// ensure, the message is encrypted
if (!mimeparser->e2ee_helper->encrypted) {
VERIFY_FAIL("This message is not encrypted.")
goto cleanup;
}
// ensure, the contact is verified
// and the message is signed with a verified key of the sender.
// this check is skipped for SELF as there is no proper SELF-peerstate
// and results in group-splits otherwise.
if (from_id!=DC_CONTACT_ID_SELF)
{
if (!dc_apeerstate_load_by_addr(peerstate, context->sql, contact->addr)
|| dc_contact_is_verified_ex(contact, peerstate) != DC_BIDIRECT_VERIFIED) {
VERIFY_FAIL("The sender of this message is not verified.")
goto cleanup;
}
if (!dc_apeerstate_has_verified_key(peerstate, mimeparser->e2ee_helper->signatures)) {
VERIFY_FAIL("The message was sent with non-verified encryption.")
goto cleanup;
}
}
// check that all members are verified.
// if a verification is missing, check if this was just gossiped - as we've verified the sender, we verify the member then.
to_ids_str = dc_array_get_string(to_ids, ",");
q3 = sqlite3_mprintf("SELECT c.addr, LENGTH(ps.verified_key_fingerprint) "
" FROM contacts c "
" LEFT JOIN acpeerstates ps ON c.addr=ps.addr "
" WHERE c.id IN(%s) ",
to_ids_str);