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/* Copyright (C) 2019-2021 June McEnroe <june@causal.agency>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*
* Additional permission under GNU GPL version 3 section 7:
*
* If you modify this Program, or any covered work, by linking or
* combining it with OpenSSL (or a modified version of that library),
* containing parts covered by the terms of the OpenSSL License and the
* original SSLeay license, the licensors of this Program grant you
* additional permission to convey the resulting work. Corresponding
* Source for a non-source form of such a combination shall include the
* source code for the parts of OpenSSL used as well as that of the
* covered work.
*/
#include <err.h>
#include <inttypes.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sysexits.h>
#include <unistd.h>
#ifdef DECLARE_RPP
#define RPP_STDIN 1
char * readpassphrase(const char *prompt, char *buf, size_t bufsiz, int flags);
#else
#include <readpassphrase.h>
#endif
#include "imap.h"
#define FETCH_HEADERS \
"Date Subject From Sender Reply-To To Cc Bcc " \
"Message-Id In-Reply-To References " \
"MIME-Version Content-Type Content-Disposition Content-Transfer-Encoding"
static void mboxrd(char *header, char *body) {
printf("From mboxrd@z Thu Jan 1 00:00:00 1970\n");
for (char *crlf; (crlf = strstr(header, "\r\n")); header = &crlf[2]) {
*crlf = '\0';
printf("%s\n", header);
}
if (!body) return;
for (char *crlf; (crlf = strstr(body, "\r\n")); body = &crlf[2]) {
*crlf = '\0';
char *from = body;
while (*from == '>') from++;
if (!strncmp(from, "From ", 5)) {
printf(">%s\n", body);
} else {
printf("%s\n", body);
}
}
printf("\n");
}
static void printNums(FILE *file, struct List nums) {
for (size_t i = 0; i < nums.len; ++i) {
uint32_t num = dataCheck(nums.ptr[i], Number).number;
fprintf(file, "%s%" PRIu32, (i ? "," : ""), num);
}
}
int main(int argc, char *argv[]) {
int rppFlags = 0;
const char *host = NULL;
const char *port = "imaps";
const char *mailbox = "INBOX";
const char *subject = NULL;
const char *from = NULL;
const char *to = NULL;
const char *cc = NULL;
bool unseen = false;
bool idle = false;
bool body = true;
const char *move = NULL;
bool seen = false;
int opt;
while (0 < (opt = getopt(argc, argv, "C:F:HM:S:T:Uh:im:p:svw"))) {
switch (opt) {
break; case 'C': cc = optarg;
break; case 'F': from = optarg;
break; case 'H': body = false;
break; case 'M': move = optarg;
break; case 'S': subject = optarg;
break; case 'T': to = optarg;
break; case 'U': unseen = true;
break; case 'h': host = optarg;
break; case 'i': idle = true;
break; case 'm': mailbox = optarg;
break; case 'p': port = optarg;
break; case 's': seen = true;
break; case 'v': imapVerbose = true;
break; case 'w': rppFlags |= RPP_STDIN;
break; default: return EX_USAGE;
}
}
const char *user = argv[optind];
if (!user) errx(EX_USAGE, "username required");
if (!host) {
host = strchr(user, '@');
if (!host) errx(EX_USAGE, "no domain in username");
host++;
}
char buf[1024];
char *pass = readpassphrase(
(rppFlags & RPP_STDIN ? "" : "Password: "),
buf, sizeof(buf), rppFlags
);
if (!pass) err(EX_UNAVAILABLE, "readpassphrase");
struct Resp resp;
struct IMAP imap = imapOpen(host, port);
respFree(respOk(imapResp(&imap)));
enum Atom login = atom("login");
fprintf(imap.w, "%s LOGIN \"%s\" \"%s\"\r\n", Atoms[login], user, pass);
for (; resp = respOk(imapResp(&imap)), resp.tag != login; respFree(resp));
respFree(resp);
enum Atom examine = atom("examine");
fprintf(
imap.w, "%s %s \"%s\"\r\n",
Atoms[examine], (move || seen ? "SELECT" : "EXAMINE"), mailbox
);
for (; resp = respOk(imapResp(&imap)), resp.tag != examine; respFree(resp));
respFree(resp);
search:;
struct List nums = {0};
enum Atom search = atom("search");
fprintf(imap.w, "%s SEARCH CHARSET UTF-8 ALL", Atoms[search]);
if (subject) fprintf(imap.w, " SUBJECT \"%s\"", subject);
if (from) fprintf(imap.w, " FROM \"%s\"", from);
if (to) fprintf(imap.w, " TO \"%s\"", to);
if (cc) fprintf(imap.w, " CC \"%s\"", cc);
if (unseen) fprintf(imap.w, " UNSEEN");
fprintf(imap.w, "\r\n");
for (; resp = respOk(imapResp(&imap)), resp.tag != search; respFree(resp)) {
if (resp.resp != AtomSearch) continue;
nums = resp.data;
resp.data = (struct List) {0};
}
respFree(resp);
if (!nums.len) {
if (!idle) errx(EX_TEMPFAIL, "no matching messages");
respFree(respOk(imapIdle(&imap, atom("idle"))));
goto search;
}
enum Atom fetch = atom("fetch");
fprintf(imap.w, "%s FETCH ", Atoms[fetch]);
printNums(imap.w, nums);
fprintf(
imap.w, " (BODY[HEADER.FIELDS (" FETCH_HEADERS ")]%s)\r\n",
(body ? " BODY[TEXT]" : "")
);
for (; resp = respOk(imapResp(&imap)), resp.tag != fetch; respFree(resp)) {
if (resp.resp != AtomFetch) continue;
if (!resp.data.len) errx(EX_PROTOCOL, "missing fetch data");
struct List items = dataCheck(resp.data.ptr[0], List).list;
struct Data header = {0};
struct Data body = {0};
for (size_t i = 0; i + 2 < items.len; ++i) {
struct Data item = items.ptr[i];
if (item.type != Atom || item.atom != AtomBody) continue;
if (items.ptr[i + 1].type != List) continue;
struct List sect = items.ptr[i + 1].list;
if (!sect.len || sect.ptr[0].type != Atom) continue;
if (sect.ptr[0].atom == AtomHeader) {
header = items.ptr[i + 2];
} else if (sect.ptr[0].atom == AtomText) {
body = items.ptr[i + 2];
}
}
mboxrd(
dataCheck(header, String).string,
(body.type == String ? body.string : NULL)
);
}
respFree(resp);
if (seen) {
enum Atom sto = atom("store");
fprintf(imap.w, "%s STORE ", Atoms[sto]);
printNums(imap.w, nums);
fprintf(imap.w, " +FLAGS.SILENT (\\Seen)\r\n");
for (; resp = respOk(imapResp(&imap)), resp.tag != sto; respFree(resp));
respFree(resp);
}
if (move) {
enum Atom mov = atom("move");
fprintf(imap.w, "%s MOVE ", Atoms[mov]);
printNums(imap.w, nums);
fprintf(imap.w, " \"%s\"\r\n", move);
for (; resp = respOk(imapResp(&imap)), resp.tag != mov; respFree(resp));
respFree(resp);
}
fprintf(imap.w, "ayy LOGOUT\r\n");
fclose(imap.r);
fclose(imap.w);
}
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