From 42ff12d487f8bb5dfe123b493451e9d339793b1f Mon Sep 17 00:00:00 2001
From: zwkylkx <51225320+zwkylkx@users.noreply.github.com>
Date: Tue, 14 Mar 2023 22:06:24 +0800
Subject: [PATCH] Create demo_tls12_get.c (#1433)

demo_tls12_get
---
 demos/src/demo_tls12_get.c | 100 +++++++++++++++++++++++++++++++++++++
 1 file changed, 100 insertions(+)
 create mode 100644 demos/src/demo_tls12_get.c

diff --git a/demos/src/demo_tls12_get.c b/demos/src/demo_tls12_get.c
new file mode 100644
index 00000000..5e13245a
--- /dev/null
+++ b/demos/src/demo_tls12_get.c
@@ -0,0 +1,100 @@
+#include <stdio.h>
+#include <errno.h>
+#include <string.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <netdb.h>
+#include <sys/types.h>
+#include <arpa/inet.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <gmssl/tls.h>
+#include <gmssl/error.h>
+#include "url_parser.h"
+
+
+int main(int argc, char *argv[])
+{
+	int ret = -1;
+	char *prog = argv[0];
+	const int cipher = TLS_cipher_ecc_sm4_cbc_sm3;
+	URL_COMPONENTS *url;
+	struct hostent *hp;
+	int port = 4430;
+	struct sockaddr_in server;
+	int sock;
+	TLS_CTX ctx;
+	TLS_CONNECT conn;
+	char request[1024];
+	uint8_t buf[16800];
+	char *p;
+	size_t len;
+
+	if (argc != 2) {
+		fprintf(stderr, "example: https://sm2only.ovssl.cn\n");
+		return 1;
+	}
+
+	if (!(url = parse_url(argv[1]))) {
+		fprintf(stderr, "parse url '%s' failure\n", argv[1]);
+		return 1;
+	}
+	if (!(hp = gethostbyname(url->host))) {
+		herror("tls12_client: '-host' invalid");
+		goto end;
+	}
+	if (url->port != -1) {
+		port = url->port;
+	}
+
+	server.sin_addr = *((struct in_addr *)hp->h_addr_list[0]);
+	server.sin_family = AF_INET;
+	server.sin_port = htons(port);
+
+	if ((sock = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
+		perror("socket");
+		goto end;
+	}
+	if (connect(sock, (struct sockaddr *)&server , sizeof(server)) < 0) {
+		perror("connect");
+		goto end;
+	}
+
+	memset(&ctx, 0, sizeof(ctx));
+	memset(&conn, 0, sizeof(conn));
+
+	tls_ctx_init(&ctx, TLS_protocol_tls12, TLS_client_mode);
+	tls_ctx_set_cipher_suites(&ctx, &cipher, 1);
+	tls_init(&conn, &ctx);
+	tls_set_socket(&conn, sock);
+
+	if (tls_do_handshake(&conn) != 1) {
+		fprintf(stderr, "%s: error\n", prog);
+		goto end;
+	}
+
+	snprintf(request, sizeof(request)-1, "GET %s HTTP/1.1\r\nHost: %s\r\n\r\n",
+		url->path ? url->path : "/",
+		url->host);
+
+	tls_send(&conn, (uint8_t *)request, strlen(request), &len);
+
+	if (tls_recv(&conn, buf, sizeof(buf), &len) != 1) {
+		fprintf(stderr, "recv failure\n");
+		goto end;
+	}
+	buf[len] = 0;
+
+	p = strstr((char *)buf, "\r\n\r\n");
+	if (p) {
+		printf("%s", p + 4);
+		fflush(stdout);
+	}
+
+end:
+	free_url_components(url);
+	close(sock);
+	tls_ctx_cleanup(&ctx);
+	tls_cleanup(&conn);
+	return 0;
+}