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/*
** Copyright 1998 - 2018 Double Precision, Inc.
** See COPYING for distribution information.
*/
#if HAVE_CONFIG_H
#undef PACKAGE
#undef VERSION
#include "config.h"
#endif
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <signal.h>
#include <ctype.h>
#include <fcntl.h>
#if HAVE_UNISTD_H
#include <unistd.h>
#endif
extern const char *externalauth();
int have_starttls()
{
const char *p;
if ((p=getenv("POP3_STARTTLS")) == 0) return (0);
if (*p != 'y' && *p != 'Y') return (0);
p=getenv("COURIERTLS");
if (!p || !*p) return (0);
if (access(p, X_OK)) return (0);
return (1);
}
int tls_required()
{
const char *p=getenv("POP3_TLS_REQUIRED");
if (p && atoi(p)) return (1);
return (0);
}
const char *pop3_externalauth()
{
const char *external=NULL;
const char *p;
if ((p=getenv("POP3_TLS")) != 0 && atoi(p))
external=externalauth();
return external;
}
void pop3dcapa()
{
const char *p;
const char *external=pop3_externalauth();
printf("+OK Here's what I can do:\r\n");
if ((p=getenv("POP3_TLS")) != 0 && atoi(p) &&
(p=getenv("POP3AUTH_TLS")) != 0 && *p)
;
else
p=getenv("POP3AUTH");
if ((p && *p) || external)
{
if (!p)
p="";
if (!external)
external="";
printf("SASL %s%s%s\r\n", p, *p && *external ? " ":"",
*external ? "EXTERNAL":"");
}
if (have_starttls())
printf("STLS\r\n");
printf("TOP\r\nUSER\r\nLOGIN-DELAY 10\r\n"
"PIPELINING\r\nUIDL\r\n"
"UTF8 USER\r\n"
"IMPLEMENTATION Courier Mail Server\r\n.\r\n");
fflush(stdout);
}
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