mirror of
https://github.com/guanzhi/GmSSL.git
synced 2026-05-07 08:56:17 +08:00
316 lines
7.7 KiB
C
316 lines
7.7 KiB
C
/*
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* Copyright 2014-2024 The GmSSL Project. All Rights Reserved.
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*
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* Licensed under the Apache License, Version 2.0 (the License); you may
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* not use this file except in compliance with the License.
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*/
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#include <stdio.h>
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#include <errno.h>
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#include <string.h>
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#include <stdlib.h>
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#include <gmssl/tls.h>
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#include <gmssl/x509.h>
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#include <gmssl/error.h>
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#define TIMEOUT_SECONDS 1
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static int client_ciphers[] = { TLS_cipher_ecc_sm4_cbc_sm3, };
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static const char *usage =
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"-host str [-port num] [-cacert file]"
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" [-cert file -key file -pass str]"
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" [-outcerts file]"
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" [-get path]"
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" [-quiet]";
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static const char *help =
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"Options\n"
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"\n"
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" -host str Domain name or IP address of remote host\n"
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" -port num Port number of remote host, default 443\n"
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" -cacert file Trusted CA certificate(s) in PEM format\n"
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" -cert file Client certificate(s) in PEM format\n"
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" -key file Private key of client certificate\n"
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" -pass password Password of encrypted private key\n"
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" -get path Send a GET request with given path of URI\n"
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" -outcerts file Save server certificates to a PEM file\n"
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" -quiet Without printing any status message\n"
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"\n"
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"Examples\n"
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"\n"
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" gmssl tlcp_client -host www.pbc.gov.cn -get / -outcerts certs.pem\n"
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"\n"
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" gmssl tlcp_client -host www.pbc.gov.cn -port 443\n"
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"\n";
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int tlcp_client_main(int argc, char *argv[])
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{
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int ret = -1;
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char *prog = argv[0];
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char *host = NULL;
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int port = 443;
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char *cacertfile = NULL;
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char *certfile = NULL;
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char *keyfile = NULL;
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char *pass = NULL;
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char *get = NULL;
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char *outcertsfile = NULL;
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int quiet = 0;
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struct hostent *hp;
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struct sockaddr_in server;
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tls_socket_t sock = -1;
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TLS_CTX ctx;
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TLS_CONNECT conn;
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char buf[1024] = {0};
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size_t len = sizeof(buf);
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char send_buf[1024] = {0};
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int read_stdin = 1;
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argc--;
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argv++;
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if (argc < 1) {
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fprintf(stderr, "usage: gmssl %s %s\n", prog, usage);
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return 1;
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}
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while (argc >= 1) {
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if (!strcmp(*argv, "-help")) {
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printf("usage: gmssl %s %s\n\n", prog, usage);
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printf("%s\n", help);
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ret = 0;
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goto end;
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} else if (!strcmp(*argv, "-host")) {
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if (--argc < 1) goto bad;
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host = *(++argv);
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} else if (!strcmp(*argv, "-port")) {
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if (--argc < 1) goto bad;
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port = atoi(*(++argv));
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} else if (!strcmp(*argv, "-cacert")) {
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if (--argc < 1) goto bad;
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cacertfile = *(++argv);
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} else if (!strcmp(*argv, "-cert")) {
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if (--argc < 1) goto bad;
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certfile = *(++argv);
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} else if (!strcmp(*argv, "-key")) {
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if (--argc < 1) goto bad;
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keyfile = *(++argv);
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} else if (!strcmp(*argv, "-pass")) {
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if (--argc < 1) goto bad;
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pass = *(++argv);
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} else if (!strcmp(*argv, "-get")) {
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if (--argc < 1) goto bad;
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get = *(++argv);
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} else if (!strcmp(*argv, "-outcerts")) {
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if (--argc < 1) goto bad;
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outcertsfile = *(++argv);
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} else if (!strcmp(*argv, "-quiet")) {
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quiet = 1;
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} else {
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fprintf(stderr, "%s: invalid option '%s'\n", prog, *argv);
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return 1;
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bad:
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fprintf(stderr, "%s: option '%s' argument required\n", prog, *argv);
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return 0;
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}
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argc--;
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argv++;
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}
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if (!host) {
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fprintf(stderr, "%s: '-in' option required\n", prog);
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return -1;
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}
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if (tls_socket_lib_init() != 1) {
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error_print();
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return -1;
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}
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if (tls_socket_create(&sock, AF_INET, SOCK_STREAM, 0) != 1) {
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fprintf(stderr, "%s: open socket error\n", prog);
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goto end;
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}
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if (!(hp = gethostbyname(host))) {
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fprintf(stderr, "%s: invalid hostname '%s'\n", prog, host);
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goto end;
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}
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server.sin_addr = *((struct in_addr *)hp->h_addr_list[0]);
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server.sin_family = AF_INET;
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server.sin_port = htons(port);
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if (tls_socket_connect(sock, &server) != 1) {
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fprintf(stderr, "%s: socket connect error\n", prog);
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goto end;
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}
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if (tls_ctx_init(&ctx, TLS_protocol_tlcp, TLS_client_mode) != 1
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|| tls_ctx_set_cipher_suites(&ctx, client_ciphers, sizeof(client_ciphers)/sizeof(client_ciphers[0])) != 1) {
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fprintf(stderr, "%s: context init error\n", prog);
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goto end;
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}
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if (cacertfile) {
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if (tls_ctx_set_ca_certificates(&ctx, cacertfile, TLS_DEFAULT_VERIFY_DEPTH) != 1) {
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fprintf(stderr, "%s: context init error\n", prog);
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goto end;
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}
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}
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if (certfile) {
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if (!keyfile) {
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fprintf(stderr, "%s: option '-key' should be assigned with '-cert'\n", prog);
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goto end;
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}
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if (!pass) {
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fprintf(stderr, "%s: option '-pass' should be assigned with '-pass'\n", prog);
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goto end;
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}
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if (tls_ctx_set_certificate_and_key(&ctx, certfile, keyfile, pass) != 1) {
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fprintf(stderr, "%s: context init error\n", prog);
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goto end;
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}
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}
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if (quiet) {
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ctx.quiet = 1;
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}
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if (tls_init(&conn, &ctx) != 1
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|| tls_set_socket(&conn, sock) != 1
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|| tls_do_handshake(&conn) != 1) {
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fprintf(stderr, "%s: error\n", prog);
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goto end;
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}
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if (outcertsfile) {
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FILE *outcertsfp;
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if (!(outcertsfp = fopen(outcertsfile, "wb"))) {
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fprintf(stderr, "%s: open '%s' failure\n", prog, outcertsfile);
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perror("fopen");
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goto end;
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}
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if (x509_certs_to_pem(conn.server_certs, conn.server_certs_len, outcertsfp) != 1) {
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fprintf(stderr, "%s: x509_certs_to_pem error\n", prog);
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fclose(outcertsfp);
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goto end;
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}
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fclose(outcertsfp);
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}
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// tls_shutdown(&conn);
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// return 0;
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if (get) {
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struct timeval timeout;
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timeout.tv_sec = TIMEOUT_SECONDS;
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timeout.tv_usec = 0;
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snprintf(buf, sizeof(buf), "GET %s HTTP/1.1\r\nHost: %s\r\n\r\n", get, host);
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if (tls_send(&conn, (uint8_t *)buf, strlen(buf), &len) != 1) {
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fprintf(stderr, "%s: send error\n", prog);
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goto end;
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}
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// use timeout to close the HTTP connection
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if (setsockopt(conn.sock, SOL_SOCKET, SO_RCVTIMEO, (const char*)&timeout, sizeof(timeout)) != 0) {
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perror("setsockopt");
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fprintf(stderr, "%s: set socket timeout error\n", prog);
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goto end;
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}
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for (;;) {
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int rv;
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rv = tls_recv(&conn, (uint8_t *)buf, sizeof(buf), &len);
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if (rv == 1) {
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fwrite(buf, 1, len, stdout);
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fflush(stdout);
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} else if (rv == 0) {
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fprintf(stderr, "%s: TLCP connection is closed by remote host\n", prog);
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goto end;
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} else if (rv == -EAGAIN) {
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// when timeout, tls_recv return -EAGAIN (-11)
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tls_shutdown(&conn);
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ret = 0;
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goto end;
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} else {
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fprintf(stderr, "%s: tls_recv error\n", prog);
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goto end;
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}
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}
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}
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for (;;) {
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fd_set fds;
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FD_ZERO(&fds);
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FD_SET(conn.sock, &fds);
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if (read_stdin)
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#ifdef WIN32
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FD_SET(_fileno, &fds); // in WIN32, first arg type is SOCKET, maybe typedef of uint
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#else
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FD_SET(STDIN_FILENO, &fds); // in POSIX, first arg type is int
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#endif
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if (select(conn.sock + 1, &fds, NULL, NULL, NULL) < 0) {
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fprintf(stderr, "%s: select error\n", prog);
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goto end;
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}
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#ifdef WIN32
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if (read_stdin && FD_ISSET(_fileno, &fds)) {
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#else
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if (read_stdin && FD_ISSET(STDIN_FILENO, &fds)) {
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#endif
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if (fgets(buf, sizeof(buf), stdin)) {
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if (tls_send(&conn, (uint8_t *)buf, strlen(buf), &len) != 1) {
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fprintf(stderr, "%s: send error\n", prog);
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goto end;
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}
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} else {
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if (!feof(stdin)) {
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fprintf(stderr, "%s: length of input line exceeds buffer size\n", prog);
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goto end;
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}
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read_stdin = 0;
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}
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}
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if (FD_ISSET(conn.sock, &fds)) {
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int rv;
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rv = tls_recv(&conn, (uint8_t *)buf, sizeof(buf), &len);
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if (rv == 1) {
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fwrite(buf, 1, len, stdout);
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fflush(stdout);
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} else if (rv == 0) {
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fprintf(stderr, "Connection closed by remote host\n");
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goto end;
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} else if (rv == -EAGAIN) {
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// should not happen
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error_print();
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goto end;
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} else {
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error_print();
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fprintf(stderr, "%s: tls_recv error\n", prog);
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goto end;
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}
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}
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}
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end:
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// FIXME: clean ctx and connection ASAP, as Ctrl-C is not handled
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if (sock != -1) tls_socket_close(sock);
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tls_ctx_cleanup(&ctx);
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tls_cleanup(&conn);
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return ret;
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}
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