9a647c326a
A new applet, ssl_client, is the TLS debug thing now. It doubles as wget's NOMMU helper. In MMU mode, wget still forks, but then directly calls TLS code, without execing. This can also be applied to sendmail/popmail (SMTPS / SMTP+starttls support) and nc --ssl (ncat, nmap's nc clone, has such option). function old new delta tls_handshake - 1691 +1691 tls_run_copy_loop - 443 +443 ssl_client_main - 128 +128 packed_usage 30978 31007 +29 wget_main 2508 2535 +27 applet_names 2553 2560 +7 ... xwrite_encrypted 360 342 -18 tls_main 2127 - -2127 ------------------------------------------------------------------------------ (add/remove: 4/1 grow/shrink: 13/8 up/down: 2351/-2195) Total: 156 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
56 lines
1.3 KiB
C
56 lines
1.3 KiB
C
/*
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* Copyright (C) 2017 Denys Vlasenko
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*
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* Licensed under GPLv2, see file LICENSE in this source tree.
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*/
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//config:config SSL_CLIENT
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//config: bool "ssl_client"
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//config: default y
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//config: select TLS
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//config: help
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//config: This tool pipes data to/from a socket, TLS-encrypting it.
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//applet:IF_SSL_CLIENT(APPLET(ssl_client, BB_DIR_USR_BIN, BB_SUID_DROP))
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//kbuild:lib-$(CONFIG_SSL_CLIENT) += ssl_client.o
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//usage:#define ssl_client_trivial_usage
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//usage: "-s FD [-r FD] [-n SNI]"
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//usage:#define ssl_client_full_usage ""
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#include "libbb.h"
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int ssl_client_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int ssl_client_main(int argc UNUSED_PARAM, char **argv)
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{
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tls_state_t *tls;
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const char *sni = NULL;
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int opt;
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// INIT_G();
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tls = new_tls_state();
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opt = getopt32(argv, "s:#r:#n:", &tls->ofd, &tls->ifd, &sni);
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if (!(opt & 2)) {
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/* -r N defaults to -s N */
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tls->ifd = tls->ofd;
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}
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if (!(opt & 3)) {
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if (!argv[1])
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bb_show_usage();
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/* Undocumented debug feature: without -s and -r, takes HOST arg and connects to it */
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//
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// Talk to kernel.org:
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// printf "GET / HTTP/1.1\r\nHost: kernel.org\r\n\r\n" | ./busybox ssl_client kernel.org
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if (!sni)
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sni = argv[1];
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tls->ifd = tls->ofd = create_and_connect_stream_or_die(argv[1], 443);
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}
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tls_handshake(tls, sni);
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tls_run_copy_loop(tls);
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return EXIT_SUCCESS;
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}
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