mirror of
https://github.com/guanzhi/GmSSL.git
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413 lines
11 KiB
C
413 lines
11 KiB
C
/*
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* Copyright 2014-2026 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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/*
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* FIXME: 本文件中多处使用 atoi() 解析命令行参数（如 -port），存在安全隐患：
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*
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* 1. 错误不可检测：atoi("abc") 和 atoi("0") 均返回 0，无法区分有效值 0 和解析错误。
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* 2. 溢出是未定义行为：atoi 遇到超出 INT_MAX 的输入时行为未定义，编译器可能产生不可预测的结果。
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* 3. 负数可绕过边界检查：atoi("-1") 返回 -1，可能绕过只检查下界的验证逻辑。
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*
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* 应在后续版本中将 atoi 替换为 strtol()，配合 errno 和 endptr 做完整的错误检查：
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* errno = 0;
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* long val = strtol(arg, &endptr, 10);
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* if (errno || *endptr || val < 0 || val > INT_MAX) { error; }
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* port = (int)val;
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*
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* 同样的 atoi 问题也存在于其他 tlcp_*.c、tls12_*.c、tls13_*.c 以及 sm4*.c 等工具文件中。
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*/
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <gmssl/mem.h>
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#include <gmssl/sm2.h>
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#include <gmssl/tls.h>
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#include <gmssl/error.h>
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static const char *options = "[-port num] -cert pem -key pem -pass str [-cipher_suite str] [-alpn str] [-cert_request] [-cacert pem] [-verbose]";
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static const char *help =
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"Options\n"
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"\n"
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" -port num Listening port number, default 443\n"
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" -cert pem Server's certificate chain in PEM format, may appear multiple times\n"
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" -key pem Server's signing and encryption private keys in PEM format: signing key first, encryption key second, may appear multiple times\n"
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" -pass str Password to decrypt both private keys in the same -key PEM, may appear multiple times\n"
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" -cipher_suite str Supported cipher suites, may appear multiple times, higher priority first\n"
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" -alpn str Application protocol name, may appear multiple times, higher priority first\n"
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" -cert_request Client certificate request\n"
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" -cacert pem CA certificate for client certificate verification\n"
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" -verbose Print TLS handshake messages\n"
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"\n"
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#include "tlcp_help.h"
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"\n";
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static int do_handshake_select(TLS_CONNECT *conn)
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{
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int ret;
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fd_set rfds;
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fd_set wfds;
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for (;;) {
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ret = tls_do_handshake(conn);
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if (ret == 1) {
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return 1;
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}
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FD_ZERO(&rfds);
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FD_ZERO(&wfds);
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if (ret == TLS_ERROR_RECV_AGAIN) {
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FD_SET(conn->sock, &rfds);
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} else if (ret == TLS_ERROR_SEND_AGAIN) {
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FD_SET(conn->sock, &wfds);
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} else {
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error_print();
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return -1;
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}
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if (select((int)(conn->sock + 1), &rfds, &wfds, NULL, NULL) < 0) {
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error_print();
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return -1;
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}
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}
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}
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static int do_shutdown_select(TLS_CONNECT *conn)
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{
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int ret;
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fd_set rfds;
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fd_set wfds;
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for (;;) {
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ret = tls_shutdown(conn);
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if (ret == 1) {
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return 1;
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}
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FD_ZERO(&rfds);
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FD_ZERO(&wfds);
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if (ret == TLS_ERROR_RECV_AGAIN) {
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FD_SET(conn->sock, &rfds);
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} else if (ret == TLS_ERROR_SEND_AGAIN) {
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FD_SET(conn->sock, &wfds);
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} else {
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error_print();
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return -1;
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}
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if (select((int)(conn->sock + 1), &rfds, &wfds, NULL, NULL) < 0) {
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error_print();
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return -1;
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}
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}
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}
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static int do_send_select(TLS_CONNECT *conn, const uint8_t *buf, size_t len)
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{
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int ret;
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size_t offset = 0;
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fd_set rfds;
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fd_set wfds;
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while (offset < len) {
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size_t sentlen = 0;
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ret = tls_send(conn, buf + offset, len - offset, &sentlen);
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if (ret == 1) {
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offset += sentlen;
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continue;
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}
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FD_ZERO(&rfds);
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FD_ZERO(&wfds);
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if (ret == TLS_ERROR_RECV_AGAIN) {
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FD_SET(conn->sock, &rfds);
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} else if (ret == TLS_ERROR_SEND_AGAIN) {
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FD_SET(conn->sock, &wfds);
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} else {
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error_print();
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return -1;
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}
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if (select((int)(conn->sock + 1), &rfds, &wfds, NULL, NULL) < 0) {
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error_print();
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return -1;
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}
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}
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return 1;
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}
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int tlcp_server_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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int port = 443;
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int cipher_suites[4];
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size_t cipher_suites_cnt = 0;
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char *certfiles[4];
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size_t certfiles_cnt = 0;
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char *signkeyfiles[sizeof(certfiles)/sizeof(certfiles[0])];
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size_t signkeyfiles_cnt = 0;
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char *signpasses[sizeof(certfiles)/sizeof(certfiles[0])];
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size_t signpasses_cnt = 0;
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char *alpn_protocols[4];
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size_t alpn_protocols_cnt = 0;
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int cert_request = 0;
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char *cacertfile = NULL;
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int verbose = 0;
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TLS_CTX ctx;
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TLS_CONNECT conn;
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char buf[1600] = {0};
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size_t len = sizeof(buf);
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tls_socket_t sock;
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tls_socket_t conn_sock;
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struct sockaddr_in server_addr;
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struct sockaddr_in client_addr;
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tls_socklen_t client_addrlen;
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size_t i;
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argc--;
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argv++;
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if (argc < 1) {
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fprintf(stderr, "usage: %s %s\n", prog, options);
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return 1;
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}
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while (argc > 0) {
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if (!strcmp(*argv, "-help")) {
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printf("usage: %s %s\n", prog, options);
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printf("%s\n", help);
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return 0;
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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, "-cert")) {
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if (certfiles_cnt >= sizeof(certfiles)/sizeof(certfiles[0])) {
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fprintf(stderr, "%s: too many -cert options\n", prog);
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return -1;
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}
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if (--argc < 1) goto bad;
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certfiles[certfiles_cnt++] = *(++argv);
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} else if (!strcmp(*argv, "-key")) {
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if (signkeyfiles_cnt >= sizeof(signkeyfiles)/sizeof(signkeyfiles[0])) {
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fprintf(stderr, "%s: too many -key options\n", prog);
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return -1;
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}
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if (--argc < 1) goto bad;
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signkeyfiles[signkeyfiles_cnt++] = *(++argv);
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} else if (!strcmp(*argv, "-pass")) {
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if (signpasses_cnt >= sizeof(signpasses)/sizeof(signpasses[0])) {
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fprintf(stderr, "%s: too many -pass options\n", prog);
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return -1;
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}
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if (--argc < 1) goto bad;
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signpasses[signpasses_cnt++] = *(++argv);
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} else if (!strcmp(*argv, "-cipher_suite")) {
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char *cipher_suite_name;
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int cipher_suite;
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if (cipher_suites_cnt >= sizeof(cipher_suites)/sizeof(cipher_suites[0])) {
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fprintf(stderr, "%s: too many -cipher_suite options\n", prog);
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return -1;
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}
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if (--argc < 1) goto bad;
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cipher_suite_name = *(++argv);
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if ((cipher_suite = tls_cipher_suite_from_name(cipher_suite_name)) == 0) {
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fprintf(stderr, "%s: invalid -cipher_suite '%s' value\n", prog, cipher_suite_name);
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return -1;
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}
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cipher_suites[cipher_suites_cnt++] = cipher_suite;
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} else if (!strcmp(*argv, "-alpn")) {
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if (alpn_protocols_cnt >= sizeof(alpn_protocols)/sizeof(alpn_protocols[0])) {
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fprintf(stderr, "%s: too many -alpn options\n", prog);
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return -1;
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}
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if (--argc < 1) goto bad;
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alpn_protocols[alpn_protocols_cnt++] = *(++argv);
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} else if (!strcmp(*argv, "-cert_request")) {
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cert_request = 1;
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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, "-verbose")) {
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verbose = 5;
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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 1;
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}
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argc--;
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argv++;
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}
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if (!certfiles_cnt) {
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fprintf(stderr, "%s: '-cert' option required\n", prog);
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return 1;
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}
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if (!signkeyfiles_cnt) {
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fprintf(stderr, "%s: '-key' option required\n", prog);
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return 1;
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}
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if (!signpasses_cnt) {
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fprintf(stderr, "%s: '-pass' option required\n", prog);
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return 1;
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}
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if (certfiles_cnt != signkeyfiles_cnt || signkeyfiles_cnt != signpasses_cnt) {
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fprintf(stderr, "%s: -cert/-key/-pass counts mismatch\n", prog);
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return 1;
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}
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if (!cipher_suites_cnt) {
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fprintf(stderr, "%s: '-cipher_suite' option required\n", prog);
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return 1;
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}
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memset(&ctx, 0, sizeof(ctx));
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memset(&conn, 0, sizeof(conn));
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if (tls_ctx_init(&ctx, TLS_protocol_tlcp, TLS_server_mode) != 1
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|| tls_ctx_set_cipher_suites(&ctx, cipher_suites, cipher_suites_cnt) != 1) {
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error_print();
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return -1;
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}
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if (verbose && tls_ctx_set_verbose(&ctx, verbose) != 1) {
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error_print();
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return -1;
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}
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if (alpn_protocols_cnt) {
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if (tls_ctx_set_application_layer_protocol_negotiation(&ctx,
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alpn_protocols, alpn_protocols_cnt) != 1) {
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error_print();
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return -1;
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}
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}
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for (i = 0; i < certfiles_cnt; i++) {
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if (tlcp_ctx_add_server_certificate_and_keys(&ctx,
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certfiles[i], signkeyfiles[i], signpasses[i]) != 1) {
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error_print();
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return -1;
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}
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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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error_print();
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return -1;
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}
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}
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if (cert_request) {
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if (!cacertfile) {
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fprintf(stderr, "%s: -cacert required by -cert_request\n", prog);
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return 1;
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}
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if (tls_ctx_enable_certificate_request(&ctx, 1) != 1) {
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error_print();
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return -1;
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}
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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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error_print();
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return 1;
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}
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server_addr.sin_family = AF_INET;
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server_addr.sin_addr.s_addr = INADDR_ANY;
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server_addr.sin_port = htons(port);
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if (tls_socket_bind(sock, &server_addr) != 1) {
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fprintf(stderr, "%s: socket bind error\n", prog);
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goto end;
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}
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puts("start listen ...\n");
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tls_socket_listen(sock, 1);
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restart:
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client_addrlen = sizeof(client_addr);
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if (tls_socket_accept(sock, &client_addr, &conn_sock) != 1) {
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fprintf(stderr, "%s: socket accept error\n", prog);
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goto end;
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}
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puts("socket connected\n");
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if (tls_init(&conn, &ctx) != 1
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|| tls_set_socket(&conn, conn_sock) != 1) {
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error_print();
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tls_socket_close(conn_sock);
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goto restart;
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}
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if (tls_socket_set_nonblocking(conn_sock, 1) != 1) {
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error_print();
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tls_cleanup(&conn);
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tls_socket_close(conn_sock);
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goto restart;
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}
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if (do_handshake_select(&conn) != 1) {
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error_print();
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tls_cleanup(&conn);
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tls_socket_close(conn_sock);
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goto restart;
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}
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for (;;) {
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int rv;
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fd_set fds;
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do {
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FD_ZERO(&fds);
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FD_SET(conn.sock, &fds);
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if (select((int)(conn.sock + 1), &fds, NULL, NULL, NULL) < 0) {
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fprintf(stderr, "%s: select failed\n", prog);
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goto end;
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}
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len = sizeof(buf);
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if ((rv = tls_recv(&conn, (uint8_t *)buf, sizeof(buf), &len)) != 1) {
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if (rv == TLS_ERROR_RECV_AGAIN
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|| rv == TLS_ERROR_SEND_AGAIN) {
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continue;
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}
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if (rv < 0) {
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fprintf(stderr, "%s: recv failure\n", prog);
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} else {
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if (do_shutdown_select(&conn) != 1) {
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fprintf(stderr, "%s: shutdown failure\n", prog);
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}
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fprintf(stderr, "%s: Disconnected by remote\n", prog);
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}
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//tls_socket_close(conn.sock); // FIXME:
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tls_cleanup(&conn);
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goto restart;
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}
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} while (!len);
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if (do_send_select(&conn, (uint8_t *)buf, len) != 1) {
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fprintf(stderr, "%s: send failure, close connection\n", prog);
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tls_socket_close(conn.sock);
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goto end;
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}
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}
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end:
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return ret;
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}
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