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/*
* Copyright (C) 2017 Denys Vlasenko
*
* Licensed under GPLv2, see file LICENSE in this source tree.
*/
//config:config SSL_CLIENT
//config: bool "ssl_client (23 kb)"
//config: default y
//config: select TLS
//config: help
//config: This tool pipes data to/from a socket, TLS-encrypting it.
//applet:IF_SSL_CLIENT(APPLET(ssl_client, BB_DIR_USR_BIN, BB_SUID_DROP))
//kbuild:lib-$(CONFIG_SSL_CLIENT) += ssl_client.o
//usage:#define ssl_client_trivial_usage
//usage: "[-e] -s FD [-r FD] [-n SNI]"
//usage:#define ssl_client_full_usage ""
#include "libbb.h"
int ssl_client_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int ssl_client_main(int argc UNUSED_PARAM, char **argv)
{
tls_state_t *tls;
const char *sni = NULL;
int opt;
// INIT_G();
tls = new_tls_state();
opt = getopt32(argv, "es:+r:+n:", &tls->ofd, &tls->ifd, &sni);
if (!(opt & (1<<2))) {
/* -r N defaults to -s N */
tls->ifd = tls->ofd;
}
if (!(opt & (3<<1))) {
if (!argv[1])
bb_show_usage();
/* Undocumented debug feature: without -s and -r, takes HOST arg and connects to it */
//
// Talk to kernel.org:
// printf "GET / HTTP/1.1\r\nHost: kernel.org\r\n\r\n" | busybox ssl_client kernel.org
if (!sni)
sni = argv[1];
tls->ifd = tls->ofd = create_and_connect_stream_or_die(argv[1], 443);
}
tls_handshake(tls, sni);
BUILD_BUG_ON(TLSLOOP_EXIT_ON_LOCAL_EOF != 1);
tls_run_copy_loop(tls, /*flags*/ opt & 1);
return EXIT_SUCCESS;
}
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