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58 lines
1.4 KiB
C
58 lines
1.4 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 (28 kb)"
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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: "[-e] -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, "es:+r:+n:", &tls->ofd, &tls->ifd, &sni);
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if (!(opt & (1<<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<<1))) {
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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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BUILD_BUG_ON(TLSLOOP_EXIT_ON_LOCAL_EOF != 1);
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tls_run_copy_loop(tls, /*flags*/ opt & 1);
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return EXIT_SUCCESS;
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}
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