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/* Copyright (c) 2002-2018 Dovecot authors, see the included COPYING file */
#include "lib.h"
#include "istream.h"
#include "str.h"
#include "message-address.h"
#include "message-part-data.h"
#include "message-parser.h"
#include "imap-parser.h"
#include "imap-envelope.h"
#include "imap-quote.h"
/*
* Envelope write
*/
static void imap_write_address(string_t *str, struct message_address *addr)
{
if (addr == NULL) {
str_append(str, "NIL");
return;
}
str_append_c(str, '(');
while (addr != NULL) {
str_append_c(str, '(');
if (addr->name == NULL)
str_append(str, "NIL");
else {
imap_append_string_for_humans(str,
(const void *)addr->name, strlen(addr->name));
}
str_append_c(str, ' ');
imap_append_nstring(str, addr->route);
str_append_c(str, ' ');
imap_append_nstring(str, addr->mailbox);
str_append_c(str, ' ');
imap_append_nstring(str, addr->domain);
str_append_c(str, ')');
addr = addr->next;
}
str_append_c(str, ')');
}
void imap_envelope_write(struct message_part_envelope *data,
string_t *str)
{
#define NVL(str, nullstr) ((str) != NULL ? (str) : (nullstr))
static const char *empty_envelope =
"NIL NIL NIL NIL NIL NIL NIL NIL NIL NIL";
if (data == NULL) {
str_append(str, empty_envelope);
return;
}
imap_append_nstring_nolf(str, data->date);
str_append_c(str, ' ');
if (data->subject == NULL)
str_append(str, "NIL");
else {
imap_append_string_for_humans(str,
(const unsigned char *)data->subject,
strlen(data->subject));
}
str_append_c(str, ' ');
imap_write_address(str, data->from);
str_append_c(str, ' ');
imap_write_address(str, NVL(data->sender, data->from));
str_append_c(str, ' ');
imap_write_address(str, NVL(data->reply_to, data->from));
str_append_c(str, ' ');
imap_write_address(str, data->to);
str_append_c(str, ' ');
imap_write_address(str, data->cc);
str_append_c(str, ' ');
imap_write_address(str, data->bcc);
str_append_c(str, ' ');
imap_append_nstring_nolf(str, data->in_reply_to);
str_append_c(str, ' ');
imap_append_nstring_nolf(str, data->message_id);
}
/*
* ENVELOPE parsing
*/
static bool
imap_envelope_parse_address(const struct imap_arg *arg,
pool_t pool, struct message_address **addr_r)
{
struct message_address *addr;
const struct imap_arg *list_args;
const char *name, *route, *mailbox, *domain;
unsigned int list_count;
if (!imap_arg_get_list_full(arg, &list_args, &list_count))
return FALSE;
/* we require 4 arguments, strings or NILs */
if (list_count < 4)
return FALSE;
if (!imap_arg_get_nstring(&list_args[0], &name))
return FALSE;
if (!imap_arg_get_nstring(&list_args[1], &route))
return FALSE;
if (!imap_arg_get_nstring(&list_args[2], &mailbox))
return FALSE;
if (!imap_arg_get_nstring(&list_args[3], &domain))
return FALSE;
addr = p_new(pool, struct message_address, 1);
addr->name = p_strdup(pool, name);
addr->route = p_strdup(pool, route);
addr->mailbox = p_strdup(pool, mailbox);
addr->domain = p_strdup(pool, domain);
*addr_r = addr;
return TRUE;
}
static bool
imap_envelope_parse_addresses(const struct imap_arg *arg,
pool_t pool, struct message_address **addrs_r)
{
struct message_address *first, *addr, *prev;
const struct imap_arg *list_args;
if (arg->type == IMAP_ARG_NIL) {
*addrs_r = NULL;
return TRUE;
}
if (!imap_arg_get_list(arg, &list_args))
return FALSE;
first = addr = prev = NULL;
for (; !IMAP_ARG_IS_EOL(list_args); list_args++) {
if (!imap_envelope_parse_address
(list_args, pool, &addr))
return FALSE;
if (first == NULL)
first = addr;
if (prev != NULL)
prev->next = addr;
prev = addr;
}
*addrs_r = first;
return TRUE;
}
bool imap_envelope_parse_args(const struct imap_arg *args,
pool_t pool, struct message_part_envelope **envlp_r,
const char **error_r)
{
struct message_part_envelope *envlp;
envlp = p_new(pool, struct message_part_envelope, 1);
if (!imap_arg_get_nstring(args++, &envlp->date)) {
*error_r = "Invalid date field";
return FALSE;
}
envlp->date = p_strdup(pool, envlp->date);
if (!imap_arg_get_nstring(args++, &envlp->subject)) {
*error_r = "Invalid subject field";
return FALSE;
}
envlp->subject = p_strdup(pool, envlp->subject);
if (!imap_envelope_parse_addresses(args++, pool, &envlp->from)) {
*error_r = "Invalid from field";
return FALSE;
}
if (!imap_envelope_parse_addresses(args++, pool, &envlp->sender)) {
*error_r = "Invalid sender field";
return FALSE;
}
if (!imap_envelope_parse_addresses(args++, pool, &envlp->reply_to)) {
*error_r = "Invalid reply_to field";
return FALSE;
}
if (!imap_envelope_parse_addresses(args++, pool, &envlp->to)) {
*error_r = "Invalid to field";
return FALSE;
}
if (!imap_envelope_parse_addresses(args++, pool, &envlp->cc)) {
*error_r = "Invalid cc field";
return FALSE;
}
if (!imap_envelope_parse_addresses(args++, pool, &envlp->bcc)) {
*error_r = "Invalid bcc field";
return FALSE;
}
if (!imap_arg_get_nstring(args++, &envlp->in_reply_to)) {
*error_r = "Invalid in_reply_to field";
return FALSE;
}
envlp->in_reply_to = p_strdup(pool, envlp->in_reply_to);
if (!imap_arg_get_nstring(args++, &envlp->message_id)) {
*error_r = "Invalid message_id field";
return FALSE;
}
envlp->message_id = p_strdup(pool, envlp->message_id);
*envlp_r = envlp;
return TRUE;
}
bool imap_envelope_parse(const char *envelope,
pool_t pool, struct message_part_envelope **envlp_r,
const char **error_r)
{
struct istream *input;
struct imap_parser *parser;
const struct imap_arg *args;
int ret;
bool success;
input = i_stream_create_from_data(envelope, strlen(envelope));
(void)i_stream_read(input);
parser = imap_parser_create(input, NULL, SIZE_MAX);
ret = imap_parser_finish_line(parser, 0,
IMAP_PARSE_FLAG_LITERAL_TYPE, &args);
if (ret < 0) {
*error_r = t_strdup_printf("IMAP parser failed: %s",
imap_parser_get_error(parser, NULL));
success = FALSE;
} else if (ret == 0) {
*error_r = "Empty envelope";
success = FALSE;
} else {
success = imap_envelope_parse_args(args, pool, envlp_r, error_r);
}
imap_parser_unref(&parser);
i_stream_destroy(&input);
return success;
}
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