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RRTcodebaseC

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char *p1 = NULL, *p2 = NULL;
if (dc_param_get_int(factory->msg->param, DC_PARAM_GUARANTEE_E2EE, 0)) {
p1 = dc_stock_str(factory->context, DC_STR_ENCRYPTEDMSG); /* we SHOULD NOT spread encrypted subjects, date etc. in potentially unencrypted MDNs */
}
else {
p1 = dc_msg_get_summarytext(factory->msg, DC_APPROX_SUBJECT_CHARS);
}
p2 = dc_stock_str_repl_string(factory->context, DC_STR_READRCPT_MAILBODY, p1);
message_text = dc_mprintf("%s" LINEEND, p2);
free(p2);
free(p1);
struct mailmime* human_mime_part = build_body_text(message_text);
mailmime_add_part(multipart, human_mime_part);
/* second body part: machine-readable, always REQUIRED by RFC 6522 */
message_text2 = dc_mprintf(
"Reporting-UA: Delta Chat %s" LINEEND
"Original-Recipient: rfc822;%s" LINEEND
"Final-Recipient: rfc822;%s" LINEEND
"Original-Message-ID: <%s>" LINEEND
"Disposition: manual-action/MDN-sent-automatically; displayed" LINEEND, /* manual-action: the user has configured the MUA to send MDNs (automatic-action implies the receipts cannot be disabled) */
DC_VERSION_STR,
factory->from_addr,
factory->from_addr,
factory->msg->rfc724_mid);
struct mailmime_content* content_type = mailmime_content_new_with_str("message/disposition-notification");
struct mailmime_fields* mime_fields = mailmime_fields_new_encoding(MAILMIME_MECHANISM_8BIT);
struct mailmime* mach_mime_part = mailmime_new_empty(content_type, mime_fields);
mailmime_set_body_text(mach_mime_part, message_text2, strlen(message_text2));
mailmime_add_part(multipart, mach_mime_part);
/* currently, we do not send MDNs encrypted:
- in a multi-device-setup that is not set up properly, MDNs would disturb the communication as they
are send automatically which may lead to spreading outdated Autocrypt headers.
- they do not carry any information but the Message-ID
- this save some KB
- in older versions, we did not encrypt messages to ourself when they to to SMTP - however, if these messages
are forwarded for any reasons (eg. gmail always forwards to IMAP), we have no chance to decrypt them;
this issue is fixed with 0.9.4 */
force_plaintext = DC_FP_NO_AUTOCRYPT_HEADER;
}
else
{
set_error(factory, "No message loaded.");
goto cleanup;
}
/* Encrypt the message
*************************************************************************/
if (factory->loaded==DC_MF_MDN_LOADED) {
char* e = dc_stock_str(factory->context, DC_STR_READRCPT); subject_str = dc_mprintf(DC_CHAT_PREFIX " %s", e); free(e);
}
else {
subject_str = get_subject(factory->chat, factory->msg, afwd_email);
}
struct mailimf_subject* subject = mailimf_subject_new(dc_encode_header_words(subject_str));
mailimf_fields_add(imf_fields, mailimf_field_new(MAILIMF_FIELD_SUBJECT, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, subject, NULL, NULL, NULL));
if (force_plaintext!=DC_FP_NO_AUTOCRYPT_HEADER) {
dc_e2ee_encrypt(factory->context, factory->recipients_addr,
force_plaintext, e2ee_guaranteed, min_verified,
do_gossip, message, &e2ee_helper);
}
if (e2ee_helper.encryption_successfull) {
factory->out_encrypted = 1;
if (do_gossip) {
factory->out_gossiped = 1;
}
}
/* create the full mail and return */
factory->out = mmap_string_new("");
mailmime_write_mem(factory->out, &col, message);
//{char* t4=dc_null_terminate(ret->str,ret->len); printf("MESSAGE:\n%s\n",t4);free(t4);}
success = 1;
cleanup:
if (message) {
mailmime_free(message);
}
dc_e2ee_thanks(&e2ee_helper); // frees data referenced by "mailmime" but not freed by mailmime_free()
free(message_text); // mailmime_set_body_text() does not take ownership of "text"
free(message_text2); // - " --
free(subject_str);
free(grpimage);
return success;
}